CN106391370A - Device and method for machining coating layer on surface of conical inner cavity - Google Patents

Abstract

The invention discloses an inner cavity surface coating processing device, which comprises a working box, a workpiece fixture, a first rotating device, a material spraying device, a second rotating device, a coating liquid feeding box, a feeding pipe, a heating device and the like. When in use, the workpiece is clamped on the workpiece fixture, and the first transmission device and the second transmission device are started to rotate the material spraying device and the workpiece fixture respectively. The paint is sprayed onto the surface of the inner cavity of the workpiece by the spraying device, and the spraying device is activated to move axially, so that the paint is coated on the desired position on the surface of the inner cavity of the workpiece. Then increase the rotating speed of the workpiece fixture, and at this time, the paint forms a uniform and dense film on the surface of the inner cavity of the workpiece. Then increase the rotation speed of the workpiece fixture, and turn on the heating device, and the coating is cured and formed at a suitable temperature to form a coating film with a thickness that meets the requirements. In addition, the invention also provides a surface coating processing method for the tapered inner cavity, which can achieve the same technical effect.

Description

A kind of surface coating processing device and processing method of tapered inner cavity

technical field

The invention relates to the technical field of material surface modification processing, and further relates to a tapered inner cavity surface coating processing device and a processing method thereof.

Background technique

The development of modern high-tech not only puts forward more and newer performance requirements for materials, but also provides more and newer technical means for the transformation of the properties of material surfaces. More and more new technologies have been applied to material surface engineering. Various fields of the national economy have received increasingly obvious economic and social benefits.

Surface engineering technology is to change the morphology, chemical composition, tissue structure and stress state of solid metal surface or non-metal surface through surface pretreatment, surface coating, surface modification or composite treatment of various material surface modification technologies, in order to obtain Engineering techniques for desired surface properties. The advantage of this technology is that it can prepare a thin layer of surface function that is superior to the properties of the material body in a variety of ways, and endow the processed parts with properties such as high temperature resistance, corrosion resistance, friction resistance, fatigue resistance, and radiation protection. Compared with the overall material of the component, this layer of material has a thinner thickness and a smaller area, and can greatly improve the use value of the material.

For the coating and modification processing of the surface of the tapered variable-diameter inner cavity, traditional processing technologies include thermal spraying technology, ion beam technology and vapor deposition technology. Generally speaking, there are mainly the following technical problems: 1. The bonding performance between the coating film and the material matrix is not high, and it is loose and uneven, and it is easy to produce wrinkles; 2. The thickness of the coating film is difficult to parameterize. The processing surface on the surface of the diameter inner cavity is curved, which makes it difficult to measure and control the coating thickness of the tapered surface; 3. It is difficult to process tiny tapered inner cavity devices. The surface of the tapered inner cavity has a certain degree of closure and can be processed The narrow space increases the difficulty of surface modification processing.

Therefore, for those skilled in the art, how to design a device that can evenly coat the modified coating so that it can process a uniform and consistent coating film on the surface of the variable-diameter inner cavity is currently a problem in the art. Technicians need to solve technical problems.

Contents of the invention

The invention provides a coating processing device for the surface of a conical inner cavity, which can process a uniform coating film on the surface of a variable diameter inner cavity, and its thickness can be changed by controlling the rotating speed, and the forming effect of the coating is better . The specific plan is as follows:

An inner cavity surface coating processing device, comprising:

work box;

A workpiece fixture arranged in the work box for clamping and fixing the workpiece;

a first rotating device capable of driving the workpiece fixture to rotate at a variable speed;

A spraying device that can extend into the inner cavity of the workpiece and can spray paint on the surface of the inner cavity, and the spraying device can move in the axial direction;

A second rotating device capable of driving the spraying device and the workpiece fixture to rotate coaxially;

A paint supply box for providing paint to the spray device;

connecting the coating liquid supply box with the spraying device, and a supply pipe for supplying paint;

A heating device for heating the inner cavity of the workpiece.

Optionally, the spraying device is a spraying disc capable of rotating around the center of the circle, a through hole is opened in the center of the spraying disc, and the paint flowing out from the supply pipe flows to the spraying disc through the through hole. surface.

Optionally, the feed pipe is a hose; the feed pipe is rotatably connected to the injection disk, and the injection disk rotates relative to the supply pipe.

Optionally, a fixed hard rotating tube is connected to the through hole of the spraying disc, and the rotating tube rotates synchronously with the spraying disc; the feeding tube is rotatably connected to the rotating tube to feed.

Optionally, the coating liquid supply box is arranged at the bottom of the working box, and the work clamp is arranged at the top of the working box.

Optionally, the heating device surrounds the outer circumference of the feeding pipe, and the heating device sprays hot air into the inner cavity of the workpiece through a through hole opened on the top circumference.

Optionally, an upper baffle is further provided on the top of the workpiece holder, and the first rotating device is arranged on the upper baffle.

Optionally, a collecting plate is detachably arranged in the working box, and the collecting plate is used for collecting paint flowing down from the working surface.

In addition, the present invention also provides a method for processing the surface coating of the tapered inner cavity, including:

Clamp the workpiece on the workpiece fixture;

Start the first transmission device and the second transmission device, so that the workpiece holder and the spraying device rotate in the same direction at the speeds of ω21 and ω1 respectively;

Start the paint supply box, so that the paint is delivered to the spraying device through the feed pipe at a stable speed;

Start the spraying device (4) to move axially, so that the paint is coated on the surface of the inner cavity of the workpiece;

Raise the rotational speed of the workpiece fixture to ω22, so that the paint forms a uniform and dense film on the surface of the inner cavity of the workpiece;

Raise the rotational speed of the workpiece fixture to ω23, and turn on the heating device, so that the coating is cured and formed.

Optionally, the rotation speed of ω1 is 1000r/min, the rotation speed of ω21 is 180-300r/min, the rotation speed of ω22 is 3000-3500r/min, and the rotation speed of ω23 is 3500-4000r/min.

The invention provides a surface coating processing device for a tapered inner cavity, which includes a working box, a workpiece fixture, a first rotating device, a material spraying device, a second rotating device, a coating liquid supply box, a feeding pipe, a heating device and other structures . The working box is a load-bearing installation structure, and its interior is used to install other parts, and the workpiece clamp is used to clamp and fix the workpiece; the first rotating device can drive the workpiece clamp and the workpiece to rotate at variable speeds, so that the workpiece rotates at different speeds.

The spraying device can extend into the inner cavity of the workpiece, and can spray paint on the surface of the inner cavity, and at the same time, the spraying device can move up and down along its own rotating shaft; the second rotating device can drive the spraying device and the workpiece fixture to rotate coaxially . The paint supply box provides paint to the spraying device through the feed pipe, and at the same time heats the inner cavity of the workpiece through the heating device.

When in use, the workpiece is clamped on the workpiece fixture, and the first transmission device and the second transmission device are started to rotate the material spraying device and the workpiece fixture respectively. The paint is delivered to the spray device through the paint supply box through the feed pipe, the paint is sprayed onto the surface of the inner cavity of the workpiece by the spray device, and the spray device is started to move axially, so that the paint is coated on the surface of the inner cavity of the workpiece. At the position where the paint is painted, the state of the paint at this time is point block. Then increase the rotating speed of the workpiece fixture, and at this time, the paint forms a uniform and dense film on the surface of the inner cavity of the workpiece. Then increase the rotation speed of the workpiece fixture, and turn on the heating device, so that the inner cavity of the workpiece reaches the film-forming temperature, and the coating is cured and formed at a suitable temperature to form a coating film with a thickness that meets the requirements.

The device provided by the invention can process a uniform coating film on the surface of the variable-diameter inner cavity, and its thickness can be changed through the control of the rotating speed, so that the forming effect of the coating is better.

In addition, the invention also provides a surface coating processing method for the tapered inner cavity, which can achieve the same technical effect.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the structural diagram of tapered inner cavity surface coating processing device provided by the present invention;

Figure 2a is a schematic diagram of the low-velocity jet adsorption stage;

Figure 2b is a schematic diagram of the spreading stage of the speed-increasing coating liquid;

Figure 2c is a schematic diagram of the high-speed rotation curing stage;

As shown in Figure 3, it is a schematic diagram of the force on the surface of the inner cavity of the coating liquid

These include:

Upper baffle 1, first rotating device 11, workpiece 2, workpiece fixture 3, material spraying device 4, rotating pipe 41, heating device 5, working box 6, collecting plate 61, coating liquid supply box 7, supply pipe 8 .

detailed description

The core of the present invention is to provide a tapered inner cavity surface coating processing device, which can process a uniform coating film on the surface of the variable diameter inner cavity, and its thickness can be changed through the control of the rotating speed. Better results.

In order to enable those skilled in the art to better understand the technical solution of the present invention, the tapered inner cavity surface coating processing device and its processing method of the present application will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in FIG. 1 , it is a structural schematic diagram of a specific embodiment of the tapered inner cavity surface coating processing device provided by the present invention. It mainly includes a working box 6, a workpiece fixture 3, a first rotating device 11, a spraying device 4, a second rotating device, a coating liquid supply box 7, a feeding pipe 8 and a heating device 5 and other structures. As the shell part of the whole device, the working box 6 plays a protective role, and other structures are arranged inside the working box 6, which are installed on the fixed structures in the working box 6 respectively.

The workpiece fixture 3 is used to clamp and fix the workpiece 2, and the workpiece fixture 3 can rotate at a variable speed driven by the first rotating device 11, so that the workpiece 2 can keep rotating at a specific speed. The workpiece fixture 3 has good self-centering ability, and realizes the high-speed rotation of the workpiece 2 . The workpiece fixture 3 preferably adopts a three-jaw chuck structure, and a layer of high-strength rubber material is provided on the surface of each jaw in contact with the workpiece 2 to protect the outer surface of the workpiece 2 under the premise of ensuring sufficient clamping force.

The material spraying device 4 can extend into the inner cavity of the workpiece 2 so as to spray paint on the surface of the inner cavity, and the material spraying device 4 can move along the axial direction. In addition to the vertical movement, the material spraying device 4 is driven by the second rotating device to rotate coaxially with the workpiece holder 3, and the moving direction is the direction of its rotating shaft. The first rotating device 11 and the second rotating device can adopt servo motors, which can realize variable speed rotation, and the change of speed is stable and uniform.

The working box 6 is also provided with a coating solution supply box 7 that provides coating to the spraying device 4; a feed pipe 8 is connected between the coating solution supply box 7 and the spraying device 4, and the coating in the coating solution supply box 7 It is supplied to the spraying device 4 through the supply pipe 8 . The speed and total amount of the liquid supply can be parameterized and controlled by the coating liquid supply box 7 to adjust the thickness of the coating film. In addition, a heating device 5 for heating the inner cavity of the workpiece 2 is included.

When in use, the workpiece 2 is clamped on the workpiece holder 3, and the first transmission device 11 and the second transmission device are activated to make the workpiece holder 3 and the spraying device 4 rotate respectively. The paint is delivered to the spraying device 4 through the coating liquid supply box 7 through the feed pipe 8, and the paint is sprayed onto the inner cavity surface of the workpiece 2 by the spraying device 4, and the spraying device 4 is started to move axially, so that the paint is coated on the surface of the workpiece. The position to be painted on the surface of the inner cavity of the workpiece. At this time, the state of the paint is in the form of dots and blocks. Then, the rotating speed of the workpiece holder 3 is increased, and the paint forms a uniform and dense film on the surface of the inner cavity of the workpiece 2 at this time. Then increase the rotating speed of the workpiece fixture 3, and turn on the heating device 5, so that the inner cavity of the workpiece 2 reaches the film-forming temperature, and the coating is cured and formed at a suitable temperature to form a coating film with a thickness that meets the requirements, and the coating is completed.

The device provided by the invention can process a uniform coating film on the surface of the variable-diameter inner cavity, and its thickness can be changed through the control of the rotating speed, so that the forming effect of the coating is better.

On the basis of the above, the spraying device 4 is specifically a spraying disk capable of rotating around the center of the circle. A through hole is opened in the center of the spraying disk, and the paint flowing out from the feeding pipe 8 flows to the surface of the spraying disk through the through hole. As shown in Fig. 2a to Fig. 2c, respectively represent the process diagrams of the three stages of the coating film forming process. The paint flows to the center of the upper surface of the spray disc first, and the spray disc rotates to generate centrifugal force, and the coating liquid at the center of the circle is evenly coated on the surface of the spray disc, and the paint can be sprayed out evenly at the end of the disc. Therefore, the paint droplets can be sprayed quantitatively and stably to the circumference of the annular inner cavity at the same height, which is also the premise of consistent film thickness.

Specifically, the feeding pipe 8 is a flexible tube, which can be a rubber tube, and the flexible tube can be deformed as the spraying device 4 moves up and down to adapt to different heights. The feed pipe 8 is rotationally connected with the injection disc, and adopts a cylindrical hinge connection mode, and the spray disc and the feed pipe 8 rotate relatively. In addition, in addition to setting the feed pipe 8 as a hose, other arrangements can also be used.

The through hole of the spraying disc is connected with a fixed hard rotating tube 41, the rotating tube 41 rotates synchronously with the spraying disc, and the paint can flow out from the end of the rotating tube 41. The feeding pipe 8 is connected to the other end of the rotating pipe 41 to feed the material in rotation. At this time, the second rotating device can drive the rotating pipe 41 and further drive the spray disc. Of course, the feed pipe 8 can also be set as a hard pipe as a whole, and at this time, it is connected with the coating liquid supply box 7 by sliding fit, and can slide in the coating liquid supply box 7 .

On the basis of any of the above technical solutions and their combination, the coating liquid supply box 7 is arranged at the bottom of the working box 6 , and the workpiece fixture 3 is arranged at the top of the working box 6 . This form of implementation is a specific arrangement sequence, from bottom to top, there are coating liquid supply box 7, feed pipe 8, heating device 5, material spraying device 4, workpiece fixture 3, and the paint flows from the bottom to the top. Easy to control the flow of liquid. Of course, it is also possible to arrange the components in reverse order, as long as the workpiece holder 3 and the material spraying device 4 are rotated on the horizontal plane.

The heating device 5 surrounds the outer periphery of the feed pipe 8 , the feed pipe 8 passes through the center of the heating device 5 , and the heating device 5 sprays hot air into the inner cavity of the workpiece 2 through the through hole provided on the top circumference. The main function of the heating device 5 is to solidify the coating film being formed by heating during the working process, so that the solvent part in the coating liquid evaporates and separates the coating liquid in a high temperature environment, so that the coating The concentration and viscosity of the liquid increase continuously, which also accelerates the condensation of the coating liquid, so that the cured coating film is effectively combined with the surface of the annular inner cavity, so that its performance is stable and good. Reasonable control of the heating temperature can achieve the effect of controlling the solidification speed and quality of the coating liquid. Through this heating method, it can be adapted to any machinable workpiece, including a single-opening complex tapered variable-diameter inner cavity, which greatly improves the scope of application.

In addition, an upper baffle 1 is provided on the top of the workpiece holder 3 , and the first rotating device 11 is arranged on the upper baffle 1 . The upper baffle plate 1 is not only used for installing the first rotating device 11, but also can block the splashed paint on the workpiece 2. When the rotating speed of the workpiece 2 reaches a certain height, some paint will splash out.

A collection plate 61 is detachably arranged in the work box 6, the collection plate 61 is in the shape of a ring, and is arranged below the workpiece 2, and is used to collect the paint flowing down from the work 2, and it can be disassembled if a certain amount is collected Clean or replace.

In addition, the present invention also provides a method for processing the surface coating of the tapered inner cavity, comprising the following steps:

The workpiece 2 is clamped on the workpiece holder 3;

Start the first transmission device and the second transmission device, so that the workpiece holder 3 and the spraying device 4 rotate in the same direction at the speeds of ω21 and ω1 respectively;

Start the paint supply box 7, so that the paint is delivered to the spraying device 4 through the feed pipe 8 at a stable speed, and the paint is evenly sprayed through the spraying turntable;

Start the spraying device 4 to move axially, so that the paint is applied to the part of the inner cavity surface of the workpiece 2 that needs to be provided with the coating;

Raise the rotational speed of the workpiece fixture 3 to ω22, so that the paint forms a uniform and dense film on the surface of the inner cavity of the workpiece 2;

Increase the rotational speed of the workpiece holder 3 to ω23, and turn on the heating device 5 to solidify the coating.

Because thin film coatings of different thicknesses require different rotational speeds and temperature parameters, the present invention provides a kind of specific embodiment here: take preparation 200um PVDF/PTFE composite film under the temperature of 60 ℃ as example to illustrate, and specific rotational speed is ω1 1000r/min, ω21 180~300r/min, ω22 3000~3500r/min, ω23 3500~4000r/min, divided into three stages, that is, the low-speed jet adsorption stage in the technical plan and other three stages, ω1, ω21, ω22, and ω23 should be set according to the processing requirements, so that ω22 and ω23 can be equal.

As shown in Figures 2a to 2c, the spraying process mainly includes three stages, which are the low-speed spraying adsorption stage, the accelerated coating liquid spreading stage, and the high-speed rotation curing stage.

(1) Low-speed spray adsorption stage: put the coating liquid with a certain viscosity into the coating liquid supply device 7, start the spray device 4 and the workpiece 2, and make them reach a certain stable lower rotational speed ω1 and ω21 respectively, start Coating liquid feeding device 7, so that the coating liquid is transported to the center of the spraying disc through the feeding pipeline at a stable speed, and under the action of the centrifugal force generated by the spraying disc, the coating liquid is sprayed out after the spraying disc is evenly coated. It hits and adsorbs and deposits on the surface of the vertical annular inner cavity at a certain speed to form a circumferential coating liquid adsorption zone; at the same time, the spray disc moves axially from a position with a large inner diameter to a position with a small inner diameter, forming a spray adsorption On a deposition surface, the state of the coating liquid at this time is in the form of dots and blocks.

As shown in Figure 3, it is a schematic diagram of the force on the surface of the inner cavity of the coating liquid. At the lower speed ω1 in the low-speed injection adsorption stage, the coating liquid is sprayed out through the spray device 4, and in the process of adsorption and deposition on the surface of the vertical inner cavity and the surface of the tapered inner cavity, the shear parallel to the surface of the annular inner cavity is received. The combination of shear stress F _shear and _bonding force F is equal to or greater than the gravity G of the dot-shaped coating liquid itself, which mainly balances the downward flow trend of the coating liquid, so that the coating liquid is adsorbed and deposited on the surface of the inner cavity to form dots The state of the coating liquid. The amount of coating liquid supplied at this stage is larger than that required to coat the film.

(2) Speed-up coating liquid spreading stage: after the adsorption deposition surface obtained in the low-speed spray adsorption stage, the rotation speed ω2 of the workpiece 2 is increased, and under the action of shear tensile stress F shear and centrifugal pressure F _separation , the obtained point The block coating solution spreads, the coating gradually becomes thinner, and becomes a flat coating film, and the rotation speed of the workpiece 2 is continuously increased to reach a certain stable value ω22, and a uniform and dense coating film is obtained.

In the speed-up coating liquid spreading stage, increase the rotation speed of the workpiece to ω22, so that the shear tensile stress F _shear and centrifugal pressure F _separation of the coating liquid will increase, and the high speed ω22 will be maintained, and the coating liquid will be subject to continuous large F- _shear and F- _separation (under the effect of larger rotational speed, there are F- _shear >> G, F _combination >> G, and the influence of self-gravity of the coating liquid can be ignored), the effect of F- _shear Under this condition, the coating solution quickly spreads along _the surface of the inner cavity to both sides, and the thickness gradually becomes thinner and more uniform. The surface is more tightly bonded. F- _shear and F _-bonding mainly act on the bonding layer between the coating liquid and the surface of the inner cavity, making the bonding layer more dense and uniform, and improving the bonding performance of the coating film and the surface of the inner cavity.

Specifically, the relationship of controlling the thickness of the coating film by the rotational speed of the workpiece 2 is:

H∝(ω2) ^-b

Among them, ω2 is the rotational speed of the workpiece 2, and b is a constant about the evaporation rate of the solvent of the coating liquid during the heating process.

Under the premise of a certain evaporation rate, the coating liquid with a certain viscosity can achieve the purpose of parametrically controlling the thickness of the coating film by controlling the rotation speed ω2 of the workpiece 2 .

(3) High-speed rotation curing stage: after the coating film is obtained in the speed-up coating liquid spreading stage, the workpiece 2 is kept at a stable high-speed rotation speed, and the heating device 5 is started to make the annular inner cavity reach a stable film-forming temperature. The coating film is cured and formed, and finally a coating film with the required thickness is formed.

In the high-speed rotation curing stage, after the workpiece reaches the high-speed rotation of the speed-up coating liquid spreading stage and the coating liquid is fully spread and coated, a layer of extremely thin and dense coating film with a certain thickness is obtained. At this time, the shearing of the coating liquid The shear stress F _shear and the _bonding force F between the surface of the inner cavity and the coating liquid are equal, and the forces in the vertical direction and the conical direction are balanced. Therefore, no extension occurs in the vertical direction and the conical direction, and a balanced state; when the _centrifugal pressure F is kept constant, the effect of compactness and ultra-thinness is achieved, and the state of equilibrium is reached. Keep the high-speed rotation speed, turn on the heating device 5, increase the temperature of the annular inner cavity at a uniform speed, and after reaching the evaporation temperature required by the coating film, conduct constant temperature evaporation and solidification treatment at a high-speed rotation speed for a certain period of time to obtain a coating that meets the required thickness. Coating film.

Among them, during the specific evaporation curing and forming process, the relationship between the thickness of the coating film and the evaporation rate of the coating solution solvent is:

H∝u ^b

Among them: b is a constant about the solvent evaporation rate, u is the evaporation rate of the coating solution solvent.

Under the premise that the rotation speed of the workpiece 2 is constant, the coating liquid with a certain viscosity can achieve the purpose of parametrically controlling the thickness of the coating film by controlling the evaporation rate u.

Preferably, in the three processes of the low-speed jet adsorption stage, the speed-up coating liquid spreading stage and the high-speed rotation curing stage, the inner cavity surface with a larger inner diameter and equal diameter is processed first, and then the inner cavity surface with a smaller inner diameter and variable diameter is processed. The force of the coating liquid on the surface of the equal-diameter inner cavity and the surface of the variable-diameter inner cavity is different, resulting in the problem of inconsistent flow of the coating liquid. It is necessary to set different rotation speeds of the workpiece and paint supply to achieve the thickness and density of the coating film. , Combined with the requirements of consistent performance. Specifically, the part with a smaller inner diameter has a higher rotation speed and a larger supply amount.

Adopting the processing device and method provided by the present invention can effectively improve the processing quality of the coating modification on the surface of the tapered diameter-changing inner cavity of the micro-devices, which is specifically reflected in the denser bonding layer between the coated coating film and the surface of the inner cavity and uniformity, which improves the bonding performance of the two; and the thickness of the coating film can achieve the purpose of parameterized control by controlling the rotation speed of the workpiece and the rate of heating, evaporation and solidification, and solve the problem that the existing technology cannot be controlled by parameterization; for The coating of the tapered and variable-diameter inner cavity of the micro-device can be solved as long as the rotary spray table with a very small outer diameter is used, which not only solves the processing problem of the micro-device, but also expands the scope of application of the device.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. a kind of surface of internal cavity coating processing unit (plant) is it is characterised in that include：

Work box (6)；

It is arranged in described work box (6), be used for gripping the work piece holder (3) of workpiece (2)；

Described work piece holder (3) can be driven to make first tumbler (11) of speed-changing rotation；

Can extend into described workpiece (2) inner chamber and can be to the material-spraying device (4) of inner chamber surface spraying coating, described material spray Device (4) can be axially moveable；

The second tumbler that described material-spraying device (4) is rotated coaxially can be driven with described work piece holder (3) work；

Described material-spraying device (4) is provided with the masking liquid feed box (7) of coating；

Connect described masking liquid feed box (7) and described material-spraying device (4), the feeder sleeve (8) for supplying coating；

Heater (5) to the inner chamber heating of described workpiece (2).

2. conical internal cavity face coat processing unit (plant) according to claim 1 is it is characterised in that described material-spraying device (4) For the injection disk that can rotate around the center of circle, the center of described injection disk opens up through hole, the painting flowed out from described feeder sleeve (8) Material via through holes flow to the surface of described injection disk.

3. conical internal cavity face coat processing unit (plant) according to claim 2 is it is characterised in that described feeder sleeve (8) is Flexible pipe；Described feeder sleeve (8) is connected with described injection disk rotational, and described injection disk is relatively rotated with described feeder sleeve (8).

4. conical internal cavity face coat processing unit (plant) according to claim 2 it is characterised in that described injection disk logical Be connected on hole the rotation pipe (41) of hard, described rotates pipe (41) and described injection disk synchronous rotary；Described feeder sleeve (8) rotate with described rotation pipe (41) and be connected feeding.

5. the conical internal cavity face coat processing unit (plant) according to any one of Claims 1-4 is it is characterised in that described painting Liquid feed box (7) is arranged at the bottommost of described work box (6), and described work piece holder (3) is arranged at the top of described work box (6) Portion.

6. conical internal cavity face coat processing unit (plant) according to claim 5 is it is characterised in that described heater (5) It is looped around the periphery of described feeder sleeve (8), the through hole that described heater (5) is opened up by top circumference is to described workpiece (2) Inner chamber injection hot blast.

7. conical internal cavity face coat processing unit (plant) according to claim 6 is it is characterised in that described work piece holder (3) Top also set up overhead gage (1), described first tumbler (11) is arranged on described overhead gage (1).

8. conical internal cavity face coat processing unit (plant) according to claim 5 is it is characterised in that described work box (6) is interior It is removably disposed collecting board (61), described collecting board (61) is used for collecting the coating flowing down from described work (2).

9. a kind of conical internal cavity face coat processing method is it is characterised in that include：

Workpiece (2) is clamped on work piece holder (3)；

Start the first actuating device and the second actuating device, make described work piece holder (3) and described material-spraying device (4) respectively with ω 21 and ω 1 rotating speed rotating Vortex；

Start masking liquid feed box (7), make coating be transported to described material-spraying device (4) with stable speed by feeder sleeve (8)；

Start described material-spraying device (4) to move axially, make coatings in the surface of internal cavity of described workpiece (2)；

The rotating speed lifting described work piece holder (3), to ω 22, makes coating form even compact in the surface of internal cavity of described workpiece (2) Thin film；

The rotating speed lifting described work piece holder (3) is to ω 23, and opens heater (5), makes curing of coatings molding.

10. conical internal cavity face coat processing method according to claim 9 is it is characterised in that the rotating speed of ω 1 is The rotating speed of 1000r/min, ω 21 is 180～300r/min, and the rotating speed of ω 22 is 3000～3500r/min, and the rotating speed of ω 23 is 3500～4000r/min.