CN119489525B - Extrusion molding machine and process for PET plastic bottle blanks - Google Patents

Abstract

The invention relates to the technical field of forming equipment, and provides a PET plastic bottle preform extrusion molding machine and process, wherein the machine comprises a molding main body; the first module is arranged on the molding main body, the second module is movably arranged on the molding main body, the first module is provided with a molding core body and a bearing ring groove, the bearing ring groove is arranged around the molding core body, the second module is provided with a molding groove, a trimming ring block is movably arranged in the bearing ring groove, a demolding ring groove is arranged on the inner wall of the trimming ring block, the trimming ring block stretches into or stretches out of the bearing ring groove after moving, the molding core body stretches into the molding groove after moving, a molding cavity is formed among the molding core body, the trimming ring block and the second module, the molding cavity is communicated with the demolding ring groove, and the trimming ring block is configured to separate the waste edge of the demolding ring groove from a bottle blank of the molding cavity after being moved by external force. Through above-mentioned technical scheme, the problem of the mould of extrusion moulding machine when the drawing of patterns among the prior art can't be stable and with the slitter edge separation of the drawing of patterns of being convenient for on with fashioned bottle base smoothly has been solved.

Description

Extrusion molding machine and process for PET plastic bottle blanks

Technical Field

The invention relates to the technical field of forming equipment, in particular to a PET plastic bottle preform extrusion forming machine and a process.

Background

PET (polyethylene terephthalate) plastic bottle blanks are key intermediate products for manufacturing various plastic bottles, and are widely applied to the packaging fields of various industries such as food, beverage, medicines, cosmetics and the like. For example, common mineral water bottles, beverage bottles, edible oil bottles, etc. are mostly made of PET materials.

With the continuous improvement of the technological level, automatic and intelligent production has become the mainstream, wherein the specific production process of bottle blanks comprises the steps of adding solid PET particle raw materials into a machine barrel of an extruder through a hopper, heating the PET raw materials to be gradually melted into a viscous state in the machine barrel by a heating device outside the machine barrel, driving molten PET plastic into a grinding tool under the rotation of a screw rod, finally cooling and forming the PET plastic into bottle blanks, demolding, separating a left mold from a right mold, clamping the bottle blanks on the left mold due to a circular groove of the left mold, smoothly keeping away from the right mold, completing demolding, and finally sucking the bottle blanks by a sucking disc driven by a mechanical arm to complete blanking.

However, the extrusion molding machine has the following problems that the sucking disc directly sucks the bottle blank and cannot stably and smoothly remove the slitter edges in the ring groove, so that the slitter edges can be accumulated in the ring groove for a long time to influence the quality of subsequent products, or the left die is split, the sucking disc sucks the bottle blank and the slitter edges, and the subsequent working procedures are required to remove the slitter edges on the bottle blank, so that the subsequent workload is increased.

Disclosure of Invention

The invention provides a PET plastic bottle preform extrusion molding machine and a process, which solve the problem that a mold of the extrusion molding machine in the related art cannot stably and smoothly separate a molded bottle preform from a slitter edge which is convenient to mold.

The technical scheme of the invention is as follows:

a PET plastic bottle preform extrusion molding machine comprising:

Forming a main body;

the first module is arranged on the molding main body, the second module is movably arranged on the molding main body, the first module is provided with a molding core body and a bearing ring groove, the bearing ring groove is arranged along the periphery of the molding core body, and the second module is provided with a molding groove;

the trimming ring block is movably arranged in the bearing ring groove, the inner wall of the trimming ring block is provided with a demolding ring groove, and the trimming ring block stretches into or stretches out of the bearing ring groove after moving;

after the second module moves, the molding core body stretches into the molding groove, a molding cavity is formed among the molding core body, the trimming ring block and the second module, and the molding cavity is communicated with the demolding ring groove;

the trimming ring block is configured to separate the trimming edge of the stripper ring groove from the bottle blank of the forming cavity after being moved by an external force.

As a further technical scheme, the trimming ring block has a plurality of the stripper ring grooves, a plurality of the stripper ring grooves are arranged at intervals along the moving direction of the trimming ring block, and after the trimming ring block moves, the trimming ring block is used for enabling at least one stripper ring groove to be communicated with the forming cavity, and the trimming ring block further comprises:

and the forming block moves in the forming groove, and after the second module moves, a forming cavity is formed among the forming core body, the trimming ring block, the second module and the forming block.

As a further technical solution, the stripper ring groove has an opening, and further includes:

The grid pieces are arranged at the openings, and the grid pieces are circumferentially arranged along the periphery of the demolding ring groove.

As a further technical scheme, the first module has high pressure channel and row material passageway, side cut ring piece still has two intercommunication channels, two the intercommunication passageway all communicates the drawing of patterns annular, after the side cut ring piece removes, high pressure channel intercommunication or cancel the intercommunication one of them intercommunication channel, row material passageway intercommunication or cancel the intercommunication another intercommunication channel still includes:

The heating piece is arranged on the first module and is configured to heat the slitter edges in the demolding ring groove to be molten after being electrified.

As a further technical scheme, the heating piece is spiral, and the heating piece is arranged along the periphery of the bearing ring groove.

As a further technical solution, the first module has a feed channel, which penetrates through the molding core and communicates with the molding cavity;

The molding core bodies and the molding grooves are all in a plurality, the molding core bodies are arranged in a matrix, and the molding core bodies and the molding grooves are in one-to-one correspondence.

As a further technical scheme, the method further comprises:

The first driving plate is movably arranged on the first module;

The two ends of the connecting rod are respectively arranged on the first driving plate and the trimming ring blocks, the connecting rod penetrates through the first module, and the first driving plate is configured to move and then drives a plurality of trimming ring blocks to move;

The air inlet pipe and the discharge pipe are both arranged on the first module, the air inlet pipe is communicated with the high-pressure channel, and the discharge pipe is communicated with the discharge channel.

As a further technical scheme, the first module is further provided with a feed inlet and a distribution channel, and the feed inlet is communicated with a plurality of feed channels through the distribution channel.

As a further technical solution, the first module bottom has the feed inlet, and further includes:

The piston pressurizing columns are arranged in the distribution channel in a moving mode, correspond to the feeding channels one by one, and are configured to pressurize the feeding channels after moving;

The second driving plate is movably arranged on the first module and is configured to drive the plurality of piston pressurizing columns to move after moving.

The PET plastic bottle preform extrusion process uses the PET plastic bottle preform extrusion molding machine, and comprises the following steps:

S1, feeding, namely providing PET plastic raw materials for a molding main body and processing the PET plastic raw materials into molten plastic raw materials;

s2, die assembly, namely moving the trimming ring block and the forming block to a specified position, and moving the second module to die assembly with the first module;

s3, feeding, namely, the molten plastic raw material is injected into a forming cavity through an inlet;

s4, pressurizing and forming, namely moving a piston pressurizing column, pressurizing the molding cavity, and gradually cooling and forming;

S5, demolding and blanking, namely moving the second module away from the first module, moving the trimming ring block, and controlling the mechanical arm to drive the sucker to adsorb the bottle blank.

The working principle and the beneficial effects of the invention are as follows:

1. effectively solve slitter edge processing problem:

The bottle base is directly sucked away to traditional drawing of patterns adopts the sucking disc, can't directly handle the slitter edge in the annular, still needs subsequent handling to get rid of the slitter edge, and the present case is through with traditional drawing of patterns annular and mould components of a whole that can function independently equipment to remove the setting to the drawing of patterns annular behind the split, can be after removing, drive slitter edge and the bottle base separation of forming cavity in the drawing of patterns annular on it, ensure that the bottle base just keeps clean and tidy when the drawing of patterns, need not to worry that the slitter edge remains and causes the interference to subsequent handling, the sucking disc is stable to adsorb away the bottle base simultaneously, accomplish the drawing of patterns, and avoid the slitter edge to pile up in the annular for a long time and influence subsequent product quality.

2. The subsequent workload is reduced:

compared with the traditional method that extra procedures are needed to remove the slitter edges on bottle blanks, or the sucking disc is only used for absorbing the demolding mode to remove the slitter edges by utilizing the shearing force of the entity part of the demolding ring groove, the time and the labor are wasted and the workload is increased.

Drawings

The above features, technical features, advantages and implementation of the present invention will be further described in the following description of preferred embodiments with reference to the accompanying drawings in a clear and easily understood manner.

FIG. 1 is a schematic diagram of a PET plastic bottle preform extrusion molding machine;

FIG. 2 is a first view mating diagram of a first module and a second module according to the present invention;

FIG. 3 is a schematic view of a first module and a second module according to the present invention;

FIG. 4 is a partial cross-sectional view of a first module according to the present invention;

FIG. 5 is a cross-sectional view of a molded core of a first embodiment of the present invention;

FIG. 6 is an enlarged view of portion B of FIG. 5 in accordance with the present invention;

FIG. 7 is a cross-sectional view of a molded core of a second embodiment of the present invention;

FIG. 8 is an enlarged view of portion C of FIG. 7 in accordance with the present invention;

FIG. 9 is a partial cross-sectional view of a trim ring block according to the present invention;

FIG. 10 is an enlarged view of portion D of FIG. 9 in accordance with the present invention;

FIG. 11 is a schematic view of a heating element according to the present invention;

FIG. 12 is a schematic view of a first module structure according to the present invention;

FIG. 13 is an enlarged view of portion E of FIG. 12 in accordance with the present invention;

FIG. 14 is a schematic view of a driving plate according to the present invention;

FIG. 15 is a schematic view of the structure of the air inlet pipe and the air outlet pipe in the invention;

FIG. 16 is an enlarged view of portion A of FIG. 4 in accordance with the present invention;

FIG. 17 is a schematic view of a distribution channel structure according to the present invention;

Fig. 18 is a second view mating diagram of the first module and the second module according to the present invention.

In the figure, 1, a molding main body, 2, a first module, 201, a molding core body, 202, a bearing ring groove, 203, a high-pressure channel, 204, a discharge channel, 205, a feed channel, 206, a feed inlet, 207, a distribution channel, 3, a second module, 301, a molding groove, 4, a trimming ring block, 401, a demolding ring groove, 402, an opening, 403, a communication channel, 5, a molding cavity, 6, a molding block, 7, a grid sheet, 8, a heating element, 9, a first driving plate, 10, a connecting rod, 11, an air inlet pipe, 12, a discharge pipe, 13, a piston pressurizing column, 14 and a second driving plate.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will explain the specific embodiments of the present invention with reference to the accompanying drawings. It is evident that the drawings in the following description are only examples of the invention, from which other drawings and other embodiments can be obtained by a person skilled in the art without inventive effort.

For simplicity of the drawing, only the parts relevant to the invention are schematically shown in each drawing, and they do not represent the actual structure thereof as a product. In addition, in order to simplify the drawings and facilitate understanding, components having the same structure or function in some drawings are only schematically illustrated in one of them, or only one of them is labeled. Herein, "a" means not only "only this one" but also "more than one", and "a number" includes "two" and "two or more".

In this context, unless explicitly stated or limited otherwise, the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may, for example, be fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or communicate between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In addition, in the description of the present application, the terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

Referring to fig. 1-18, a PET plastic bottle preform extrusion molding machine is provided for a first embodiment of the present invention, which comprises a molding main body 1, a first module 2 disposed on the molding main body 1, a second module 3 movably disposed on the molding main body 1, the first module 2 having a molding core 201 and a bearing ring groove 202, the bearing ring groove 202 disposed around the molding core 201, the second module 3 having a molding groove 301, a trimming ring block 4 movably disposed in the bearing ring groove 202, a stripping ring groove 401 disposed on an inner wall of the trimming ring block 4, the trimming ring block 4 moving to extend into or out of the bearing ring groove 202, the second module 3 moving to extend into the molding groove 301, the molding core 201, the trimming ring block 4 and the second module 3 forming a cavity 5, the molding cavity 5 communicating with the stripping ring groove 401, the trimming ring block 4 being configured to separate a waste edge of the stripping ring groove 401 from a bottle preform of the molding cavity 5 after being moved by an external force.

This embodiment is a first embodiment in which the extruder molding machine of the present disclosure works as follows:

Firstly, solid PET particle raw materials are added into a machine barrel of an extruder of a molding main body 1 through a hopper, and the PET raw materials are heated and melted into a viscous state by a heating device outside the machine barrel, wherein the molding main body 1 is used as a supporting framework of the whole equipment and is cast by adopting a firm metal material, such as cast iron or steel.

Secondly, the first module2 and the second module3 are assembled, the linear movement of the second module3 is completed, the forming core 201 of the first module2 stretches into the forming groove 301, a forming cavity 5 is formed among the forming core 201, the trimming ring block 4 and the second module3, and the forming cavity 5 is simultaneously communicated with the demolding annular groove 401, wherein the movement of the second module3 can be provided with a reasonable mounting guide rail and a fixing clamping groove on the forming main body 1, so that the left module and the second module3 can be conveniently and accurately mounted and stably moved, the appearance of the left module and the second module is approximately cuboid, and the bottom of the left module and the second module is provided with damping foot pads for reducing the running vibration of equipment.

Then, the molten PET plastic is injected into the molding cavity 5 by the rotation and pushing action of the screw through the extrusion outlet of the extruder and the communication pipeline on the side of the first module 2 at the fixed position, molded in the molding cavity 5, and cooled to be a bottle blank.

Finally, the second module 3 moves away from the first module 2, the forming core 201 extends out of the forming groove 301, under the clamping effect of the slitter edges in the demolding annular groove 401 on the first module 2, bottle blanks are left on the forming core 201 of the first module 2, the mechanical arm drives the sucker to prop against and adsorb the bottle blanks, the trimming annular block 4 moves by external force, the demolding annular groove 401 and the forming core 201 move relatively, the slitter edges are separated from the bottle blanks, and then the bottle blanks are adsorbed and discharged.

Specifically, the trimming ring block 4 is subjected to the form of external force, and can be realized by the cylinder arranged on the first module 2, or the sucker is arranged in the groove and has a certain movement amount through the elastic element, when the sucker butts against and adsorbs bottle blanks, the abutting part of the sucker is abutted against the trimming ring block 4, and then the mechanical arm drives the sucker to move, and then the external force is applied to the trimming ring block 4 through the abutting part, trimming is completed, and the existence of the movement amount of the sucker is just in order to avoid the damage of the sucker to the bottle blanks, and finally the bottle blanks are adsorbed.

For each component, the molding core 201 is preferably arranged at the center of the first module 2, the bearing ring groove 202 is arranged along the periphery of the molding core, the shape of the trimming ring block 4 is matched with the bearing ring groove 202, a hard alloy material is adopted, a limit supporting effect is mainly provided for the movement of the trimming ring block 4, the diameter of the inner wall demolding ring groove 401 is slightly larger than that of the cylindrical molding core 201, conditions are provided for forming the molding cavity 5, the waste edges are thoroughly separated, the molding groove 301 of the second module 3 is matched with the molding core 201 of the left module, the depth and radian of the groove are precisely machined according to the bottle blank design requirement, the movement of the groove is realized through a mounting guide rail, and the mounting guide rail is arranged at the bottom of the molding main body 1 and driven by a motor, so that the movement speed and the position can be precisely controlled.

Compared with the traditional trimming ring block 4 integrally formed with the first module 2, the trimming ring block 4 is driven to move relative to the forming core 201 by external force to rapidly remove the slitter edges, so that the subsequent workload is avoided, and further, the trimming ring block 4 is ensured to be rapidly taken out of the demolding ring groove 401 after forming, is convenient for rapid connection with the subsequent forming work, can be split and arranged, is split in half after moving, and enables the slitter edges to be automatically separated, and is reset to continue forming.

Further, the trimming ring block 4 is provided with a plurality of demolding ring grooves 401, the plurality of demolding ring grooves 401 are arranged at intervals along the moving direction of the trimming ring block 4, after the trimming ring block 4 moves, the trimming ring block is used for enabling at least one demolding ring groove 401 to be communicated with the forming cavity 5, and the trimming ring block further comprises a forming block 6 moving in the forming groove 301, and after the second module 3 moves, the forming cavity 5 is formed among the forming core 201, the trimming ring block 4, the second module 3 and the forming block 6.

The present embodiment is a second embodiment, and a partial structure is added to the first embodiment, and only differences from the first embodiment will be described below.

In this embodiment, the demolding annular grooves 401 on the inner wall of the trimming ring block 4 are additionally provided with a plurality of demolding annular grooves, and the demolding annular grooves are arranged at intervals along the moving direction of the trimming ring block 4, so that the structural complexity caused by split setting is avoided for rapidly taking out the waste edges, the production cost is further reduced, the production efficiency is improved, and the complex processing procedures are omitted.

The stripper ring grooves 401 are used one by one through the movement of the trimming ring blocks 4, and further considering that the second module 3 is clamped with the first module 2 after being moved due to the change of the positions of the stripper ring grooves 401, the positions of the forming cavities 5 also need to be changed, namely the lengths of the forming cores 201 extending into the forming grooves 301 are changed, so that the design of a plurality of groups of stripper ring grooves 401 is adapted to ensure the consistency of formed products, forming blocks 6 are arranged in the forming grooves 301 along the depth movement of the forming blocks, and the movement of the forming blocks can be accurately driven by the components such as air cylinders.

The change of the working process of the extrusion molding machine is that before the second step of die assembly, the molding block 6 is required to be moved to a proper position for the trimming ring block 4 at different positions, so that after die assembly, a consistent molding cavity 5 is formed among the molding core 201, the trimming ring block 4, the second module 3 and the molding block 6, and then the operations of feeding, molding, demolding and the like are performed.

For the use of several groups of stripper ring grooves 401, the stripper ring grooves 202 need to be used one by one from far to near, when the first stripper ring groove 401 is used and the second stripper ring groove is ready to be used, the waste edges in the first stripper ring groove 401 are filled, so that the forming of the second bottle blank cannot be influenced, the movement of the trimming ring block 4 can still complete the separation action, and after all stripper ring grooves 401 are used finally, the quick connection of production can be realized by quickly replacing the structure.

The trimming ring block moves to cut the slitter edge, can leave 'burrs' on the bottle blank, and under the holding of a plurality of demolding ring grooves, can leave a plurality of 'burrs' on each position on the same bottle body, but even if a plurality of 'burrs' remain, the use of the bottle blank can not be influenced, the tiny 'burrs' are easy to polish, the polishing procedure which is complicated and time-consuming in the prior art is not needed, and the polishing roller can simply rotate to polish after demolding and blanking to ensure the product quality.

Further, the demolding ring groove 401 is provided with an opening 402, and further comprises a plurality of grid plates 7 which are arranged at the opening 402 and are circumferentially arrayed along the periphery of the demolding ring groove 401.

Considering that the first embodiment or the second embodiment, in order to enhance the effectiveness of the separating action, the slitter edge is separated from the bottle blank more smoothly, and the annular slitter edge in the demolding annular groove 401 is provided with a 'pre-indentation' after being molded by utilizing the principle of similar pre-indentation and convenient tearing, and the annular slitter edge is changed into a slitter edge with a 'ring-shaped structure' which is arranged circumferentially in a grid-by-grid manner from the annular slitter edge, so that the trimming annular block 4 is easier to cut off the 'ring-shaped structure' by moving.

Specifically, at the opening 402 of the inner diameter of the stripper ring groove 401, a plurality of grid plates 7 are integrally formed or welded along the circumference of the periphery of the stripper ring groove 401, so that when in forming, the positions of the existing molten plastics are occupied by the grid plates 7 along the ring shape, and the molten plastics are changed into a ring shape, and meanwhile, the arrangement of the grid plates 7 does not influence the communication relation between the stripper ring groove 401 and the forming cavity 5, and the forming is not influenced.

Further, the first module 2 is provided with a high-pressure channel 203 and a discharge channel 204, the trimming ring block 4 is further provided with two communication channels 403, the two communication channels 403 are communicated with the demolding ring groove 401, after the trimming ring block 4 moves, the high-pressure channel 203 is communicated with or is not communicated with one communication channel 403, the discharge channel 204 is communicated with or is not communicated with the other communication channel 403, and the heating element 8 is arranged on the first module 2 and is configured to heat the waste edges in the demolding ring groove 401 to be molten after being electrified.

In this embodiment, in order to solve the problem that the slitter edge remaining in the stripper ring groove 401 cannot be separated, the following use of the manner of quickly replacing the trimming ring block 4 and the split design is avoided, which results in a more complex structure, and meanwhile, the quick connection of production is ensured, the recycling manner is adopted, the slitter edge which is light and thin in the stripper ring groove 401 and is made of plastic material is reheated back to be melted for recycling, the process can be realized only by the movement of the trimming ring block 4 and the heating and the pipeline arrangement, and the slitter edge is light and thin, so that after the forming, the stripper ring groove 401 is filled with the slitter edge, which does not take a long time to complete the above action, thereby affecting the production rhythm.

Specifically, a high-pressure channel 203 and a discharge channel 204 are formed in the first module 2, two communication channels 403 which are communicated with all the demolding annular grooves 401 are formed in the trimming ring block 4, the high-pressure channel 203 can be correspondingly provided with a pump body, and a heating element 8 which heats the waste edges to be molten is arranged on the first module 2, when the waste edges are fully formed in all the demolding annular grooves 401 on the trimming ring block 4 and need to be treated, the trimming ring block 4 moves to extend into the bearing annular groove 202, so that the high-pressure channel 203 and the discharge channel 204 are respectively communicated with the two communication channels 403, the heating element 8 in the form of resistance wires and the like is controlled to be electrified and heated for 10-60 seconds, all the waste edges are molten, then the pump body is controlled to pump and pressurize in the high-pressure channel 203, the molten waste edges are forced to flow away along the communication channels 403 and the discharge channel 204 for recycling, and in the normal forming, the high-pressure channel 203 and the discharge channel 204 are not communicated with the communication channels 403.

Further, the heating element 8 is spiral, and the heating element 8 is arranged along the circumference of the bearing ring groove 202.

In this embodiment, specifically, the slitter edge is in an annular structure, so as to improve the heating efficiency and shorten the time for forming the melting shape, so as to improve the production rhythm, and the heating element 8 in the form of a spiral resistance wire is used and is arranged around the bearing ring groove 202, so that heat can be more comprehensively provided for the edge cutting ring block 4 during operation.

Further, the first module 2 has a feeding channel 205, and the feeding channel 205 penetrates through the molding core 201 and is in communication with the molding cavity 5, wherein the molding core 201 and the molding groove 301 are all a plurality of, the plurality of molding cores 201 are arranged along a matrix, and the molding cores 201 and the molding grooves 301 are in one-to-one correspondence.

In this embodiment, in order to facilitate the injection of the molten PET plastic into the molding cavity 5, the feeding on the moving second module 3 is avoided, which makes it difficult to connect with the extrusion port of the extruder, and the structure is complicated, so that the first module 2 at the fixed position is provided with the feeding channel 205 and penetrates the molding core 201 to perform the smooth feeding molding.

The number of the core 201 and the number of the forming grooves 301 are several, which are in one-to-one correspondence and are arranged along a matrix, so that the production efficiency is greatly improved.

Further, the novel trimming device further comprises a first driving plate 9 which is movably arranged on the first module 2, two ends of a connecting rod 10 are respectively arranged on the first driving plate 9 and the trimming ring blocks 4, the connecting rod 10 penetrates through the first module 2, the first driving plate 9 is configured to move and then drive the trimming ring blocks 4 to move, an air inlet pipe 11 and a discharging pipe 12 are both arranged on the first module 2, the air inlet pipe 11 is communicated with the high-pressure channel 203, and the discharging pipe 12 is communicated with the discharging channel 204.

In this embodiment, correspond, for synchronous drive a plurality of side cut ring piece 4, remove through the cylinder and be provided with drive plate one 9 on first module 2 one side, for make full use of space, avoid the position of drive plate one 9 to influence the feeding, so can offer again on first module 2 and dodge the region, drive plate one 9 is located dodges the region, and be located a plurality of side cut ring piece 4 and be same one side, be convenient for install and connect, a plurality of feed channel 205 runs through the drive plate again simultaneously, make the connecting rod 10 that runs through first module 2 conveniently connect drive plate one 9 and a plurality of side cut ring piece 4, it removes to drive a plurality of side cut ring piece 4 after having realized that drive plate one 9 removes.

Meanwhile, since the first module 2 is correspondingly provided with the plurality of groups of high-pressure channels 203 and the discharge channels 204, for facilitating subsequent maintenance and synchronous operation, the air inlet pipe 11 and the discharge pipe 12 are also configured, and are respectively communicated with the high-pressure channels 203 and the discharge channels 204, and the pump body is correspondingly arranged on the air inlet pipe 11 to provide high-pressure air flow required by discharge.

Further, the first module 2 is also provided with a feed port 206 and a distribution channel 207, wherein the feed port 206 communicates with a plurality of feed channels 205 through the distribution channel 207.

In this embodiment, since only one extrusion port of the extruder needs to be uniformly distributed into the plurality of feeding channels 205, the first module 2 on the other side of the avoidance area far away from the trimming ring 4 is provided with the feeding port 206 and the distribution channel 207, so that the feeding port 206 is communicated with the plurality of feeding channels 205 through the distribution channel 207, and after the screw is rotationally pushed, the molten raw material is uniformly distributed into each feeding channel 205 along the feeding port 206 and the distribution channel 207, and the movement of the driving plate one 9 does not affect the process.

Further, the bottom of the first module 2 is provided with a feed port 206, and the device further comprises a plurality of piston pressurizing columns 13 which are movably arranged in the distribution channel 207, wherein the piston pressurizing columns 13 are in one-to-one correspondence with the feed channel 205, the piston pressurizing columns 13 are configured to pressurize the feed channel 205 after moving, a driving plate II 14 is movably arranged on the first module 2, and the driving plate II 14 is configured to drive the plurality of piston pressurizing columns 13 to move after moving.

In this embodiment, in order to improve the molding quality of the bottle blank, a plurality of piston pressurizing columns 13 are correspondingly and movably disposed in the distribution channels 207 at the same side positions of the plurality of groups of feeding channels 205, and the piston pressurizing columns 13 are correspondingly and movably disposed in the distribution channels, so that the omission of raw materials can be avoided, and the moving arrangement of the driving plate two 14 is the same as the principle of the driving plate one 9, and the cylinder driving synchronously drives the plurality of groups of piston pressurizing columns 13 to move and pressurize.

Further avoiding the position of the second driving plate 14, realizing feeding at the same time, and arranging the feeding hole 206 at the bottom.

After feeding, the piston pressurizing columns 13 are controlled to move, pressurized in the molding cavity 5, cooled gradually to mold, and then demolded and fed.

The PET plastic bottle preform extrusion process uses the PET plastic bottle preform extrusion molding machine, and comprises the following steps:

S1, feeding, namely providing PET plastic raw materials for the molding main body 1 and processing the PET plastic raw materials into molten plastic raw materials;

s2, die assembly, namely moving the trimming ring block 4 and the forming block 6 to a specified position, and moving the second module 3 and the first module 2 to die;

s3, feeding, namely, the molten plastic raw material is injected into a forming cavity 5 through an inlet;

s4, pressurizing and forming, namely moving a piston pressurizing column 13, pressurizing the molding cavity 5, and gradually cooling and forming;

S5, demolding and blanking, namely moving the second module 3 away from the first module 2, moving the trimming ring block 4 and controlling the mechanical arm to drive the sucker to adsorb the bottle blank.

It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered in the scope of the claims of the present invention.

Claims (7)

1. A PET plastic bottle preform extrusion molding machine, comprising:

A molding body (1);

The molding device comprises a molding main body (1), a first module (2) and a second module (3), wherein the first module (2) is arranged on the molding main body (1), the second module (3) is movably arranged on the molding main body (1), the first module (2) is provided with a molding core body (201) and a bearing ring groove (202), the bearing ring groove (202) is arranged around the molding core body (201), and the second module (3) is provided with a molding groove (301);

The edge cutting ring block (4) is movably arranged in the bearing ring groove (202), a demolding ring groove (401) is formed in the inner wall of the edge cutting ring block (4), and the edge cutting ring block (4) stretches into or stretches out of the bearing ring groove (202) after moving;

after the second module (3) moves, the molding core body (201) stretches into the molding groove (301), a molding cavity (5) is formed among the molding core body (201), the trimming ring block (4) and the second module (3), and the molding cavity (5) is communicated with the demolding ring groove (401);

The trimming ring block (4) is configured to separate the trimming edge of the demolding ring groove (401) from the bottle blank of the molding cavity (5) after being moved by an external force;

The side cut ring piece (4) have a plurality of drawing of patterns annular (401), a plurality of drawing of patterns annular (401) are followed side cut ring piece (4) direction of movement interval arrangement, after side cut ring piece (4) remove, be used for making at least one drawing of patterns annular (401) intercommunication shaping chamber (5), still include:

The molding block (6), the molding block (6) moves in the molding groove (301), and after the second module (3) moves, a molding cavity (5) is formed among the molding core body (201), the trimming ring block (4), the second module (3) and the molding block (6);

The stripper ring groove (401) has an opening (402), further comprising:

The grid plates (7) are arranged at the openings (402), and the grid plates (7) are circumferentially arranged along the periphery of the demolding ring groove (401);

The first module (2) is provided with a high-pressure channel (203) and a discharging channel (204), the trimming ring block (4) is further provided with two communicating channels (403), the two communicating channels (403) are all communicated with the demolding ring groove (401), after the trimming ring block (4) moves, the high-pressure channel (203) is communicated or is not communicated with one communicating channel (403), the discharging channel (204) is communicated or is not communicated with the other communicating channel (403), and the device further comprises:

And a heating element (8), wherein the heating element (8) is arranged on the first module (2), and the heating element (8) is configured to heat the slitter edge in the demolding ring groove (401) to be molten after being electrified.

2. The extrusion molding machine for PET plastic bottle blanks according to claim 1, wherein the heating element (8) is spiral, and the heating element (8) is arranged along the periphery of the bearing ring groove (202).

3. A PET plastic bottle preform extrusion-molding machine according to claim 1, characterized in that the first module (2) has a feed channel (205), the feed channel (205) extending through the molding core (201) and communicating with the molding cavity (5);

The molding core bodies (201) and the molding grooves (301) are all in a plurality, the molding core bodies (201) are arranged in a matrix, and the molding core bodies (201) and the molding grooves (301) are in one-to-one correspondence.

4. A PET plastic bottle preform extrusion machine as in claim 3, further comprising:

a first driving plate (9), wherein the first driving plate (9) is movably arranged on the first module (2);

The two ends of the connecting rod (10) are respectively arranged on the first driving plate (9) and the trimming ring blocks (4), the connecting rod (10) penetrates through the first module (2), and the first driving plate (9) is configured to move and then drive a plurality of trimming ring blocks (4) to move;

intake pipe (11) and row material pipe (12), intake pipe (11) with arrange material pipe (12) all set up on first module (2), intake pipe (11) intercommunication high-pressure channel (203), arrange material pipe (12) intercommunication row material passageway (204).

5. The PET plastic bottle preform extrusion molding machine according to claim 4, wherein the first module (2) further has a feed port (206) and a distribution channel (207), and the feed port (206) communicates with a plurality of the feed channels (205) through the distribution channel (207).

6. The PET plastic bottle preform extrusion machine of claim 5, wherein the first module (2) has the feed port (206) at the bottom, further comprising:

The piston pressurizing columns (13) are arranged in the distribution channel (207) in a moving mode, the piston pressurizing columns (13) are in one-to-one correspondence with the feeding channels (205), and the piston pressurizing columns (13) are configured to pressurize the feeding channels (205) after moving;

the second driving plate (14) is movably arranged on the first module (2), and the second driving plate (14) is configured to drive a plurality of piston pressurizing columns (13) to move after moving.

7. A process for extruding a PET plastic bottle preform, which uses the PET plastic bottle preform extruding and molding machine as claimed in claim 6, and is characterized by comprising the following steps:

s1, feeding, namely providing PET plastic raw materials for a molding main body (1) and processing the PET plastic raw materials into molten plastic raw materials;

S2, die assembly, namely moving the trimming ring block (4) and the forming block (6) to a specified position, and moving the second module (3) to die assembly with the first module (2);

S3, feeding, namely, the molten plastic raw material is injected into a forming cavity (5) through an inlet;

s4, pressurizing and forming, namely moving a piston pressurizing column (13), pressurizing the inside of the forming cavity (5), and gradually cooling and forming;

S5, demolding and blanking, namely moving the second module (3) away from the first module (2), moving the trimming ring block (4), and controlling the mechanical arm to drive the sucker to adsorb the bottle embryo.