CN102922621A - Production method for automobile roof made of fiber reinforced composite material - Google Patents

Abstract

The invention relates to a method for producing a fiber-reinforced composite automobile roof cover. Specifically, the method for producing a car roof disclosed by the present invention includes the steps of: (1) using the first mold of the present invention to prepare a fiber preform for a car roof; and (2) using the second mold of the present invention to prepare a car roof, etc. The continuous and automatic production of fiber-reinforced composite car roofs has been realized. This method has significantly shortened the production cycle of car roofs, greatly improved its production efficiency, and is beneficial to environmental protection and human health. It has a very wide range of applications prospect.

Description

A kind of production method of fiber-reinforced composite automobile roof cover

technical field

The invention belongs to the fields of automobile industry and composite materials, and in particular relates to a continuous automatic production method for fiber-reinforced composite automobile top covers.

Background technique

Due to the greenhouse effect of global warming and the increasingly prominent energy crisis, energy conservation and environmental protection have become the most important propositions faced by the automobile industry in all countries in the world. Automobile lightweight technology is one of the effective technical ways to save energy consumption and reduce environmental pollution for new energy vehicles and traditional internal combustion engine vehicles. Fiber-reinforced composite materials have a series of excellent properties such as high specific strength, high specific modulus, fatigue resistance, corrosion resistance, and strong designability. In recent years, they have become the mainstream lightweight technology trend in the automotive industry.

At present, the world's major automobile manufacturers are using fiber composite materials, especially carbon fiber composite materials, in large quantities in the future automobile technology blueprint to achieve breakthroughs in lightweight and high specific performance. Ford's research shows that reasonably designed composite materials can reduce parts by 80%, processing costs are reduced by 60% compared to steel, bonding costs are reduced by 25% to 40% compared to welding, and composite structures exhibit excellent toughness and resistance. crash performance. According to authoritative research, if the weight of the vehicle is reduced by 10%, the fuel efficiency can be increased by 6%-8%; for every 100 kg of vehicle curb weight reduction, the fuel consumption per 100 kilometers can be reduced by 0.3-0.6 liters. From the perspective of driving performance and collision safety, after the car is lightweight, the acceleration is improved, the braking distance is reduced, the inertia of the collision is reduced, and the vehicle control sensitivity, stability, noise and vibration are also improved.

However, at present, the large-scale application of fiber composite automotive parts in automobiles is greatly restricted, mainly because its continuous and automated mass production technology has not broken through. Existing preparation technologies such as hand lay-up, traditional RTM molding, and vacuum-assisted injection Molding methods, etc., have a long molding cycle, labor-intensive, low production efficiency, low degree of automation, and unstable product quality, which cannot meet the large-volume demand for parts in the automotive industry.

To sum up, there is an urgent need in this field to develop a continuous and automatic production method for fiber-reinforced composite automotive parts with short production cycle and high production efficiency.

Contents of the invention

The technical purpose of the present invention is to provide a continuous automatic production method of fiber-reinforced composite automobile roof cover with short production period and high production efficiency in view of the above-mentioned deficiencies in the prior art.

In a first aspect of the present invention, a method for producing a fiber-reinforced composite automobile roof is provided, which includes the steps of:

(1) Preparation of automotive roof fiber prefabricated parts

After the fiber fabric is shaped, the fiber fabric is cut; after the cut fiber fabric is transferred to the first mold for preparing the fiber prefabricated part of the car roof cover through a mechanical device, the mold is closed and pressurized; then the mold is opened, the mold is demoulded, and the car is taken out Top cover fiber preform, ready for use;

(2) Preparation of car roof

(2.1) after the automobile roof fiber prefabricated part that step (1) is made is transferred into the second mold that is used to prepare the automobile roof through a mechanical device, mold closing;

The second mold includes: an upper mold, a lower mold, a glue injection port and a glue outlet;

Wherein, the lower mold is located below the upper mold, and when the lower mold and the upper mold are closed, the two jointly form a mold cavity, and the mold cavity is used to manufacture a car roof; The periphery of the mold cavity has a closed resin flow channel;

The injection port is used to pour resin, it is located on the side of the upper mold or the upper surface or the side of the lower mold, and communicates with the resin flow channel, and the injection port and the resin flow channel are located on the upper mold at the same time Or in the lower mold at the same time;

The glue outlet is used to discharge resin, which is located on the upper mold and runs through the upper mold;

(2.2) Inject and/or inhale the resin from the injection port, the resin enters the resin flow channel through the injection port, and then enters the mold cavity through the resin flow channel, thereby completing the resin infusion;

(2.3) After completing the pouring of the resin, solidify the resin, then open the mold, demould, and take out the car roof product;

(2.4) Post-cure the car roof product prepared in step (2.3), and then perform trimming and grinding to obtain a fiber reinforced composite material car roof.

In another preferred example, the resin runner is located at the periphery of the mold cavity and on the upper surface of the lower mold.

In another preferred example, the resin runner is located on the periphery of the mold cavity and on the lower surface of the upper mold.

In another preferred example, the setting of the fiber fabric includes the step of: spraying a setting agent or a setting powder on the fiber fabric, so as to set the shape of the fiber fabric.

In another preferred example, the cutting of the fiber fabric includes the step of: cutting the fiber fabric according to the surface size of the first mould.

In another preferred example, the glue outlet is located away from the glue injection port and slightly deviated from the center of the upper mold.

In another preferred example, in step (1), the first mold includes: a lower mold and an upper mold; wherein, the lower mold is located below the upper mold, and the lower mold and the upper mold When the upper mold is closed, both of them jointly form a mold cavity, and the mold cavity is used for manufacturing the fiber prefabricated part of the automobile roof cover.

In another preference, the demoulding described in step (1) or step (2.3) is realized by the following demoulding device:

(a) a device with one or more suction cups; and/or

(b) One or more ejector pins provided on the lower mold.

In another preferred example, the ejector rod has a valve.

In another preferred example, the width of the resin channel is 2-30mm (preferably 5±2mm), and the depth is 0.5-5mm (preferably 2±1mm).

In another preference, in step (1), before the fiber fabric after cutting is transferred into described first mold by mechanical device, heat described first mold; And/or in step (2.1) , before the fiber preform of the automobile roof cover prepared in step (1) is transferred into the second mold through a mechanical device, the second mold is heated.

In another preferred example, the fiber fabric is a fabric formed of reinforcing fibers.

In another preferred example, the fiber fabric is selected from one or more of the following group: plain weave, twill weave, satin weave, unidirectional fabric, multiaxial warp knitted fabric and three-dimensional fabric; and/or

The fiber fabric is selected from one or more of the following groups: glass fiber fabric, carbon fiber fabric, aramid fiber fabric, basalt fiber fabric, ceramic fiber fabric, natural fiber fabric, or combinations thereof.

In another preferred example, in step (2.2), the injection and/or suction of resin from the injection port includes the steps of: using 0.1-0.6MPa injection pressure to inject resin from the injection port; After the mouth is vacuumed to the mold, the resin is injected or sucked from the injection port.

In another preferred example, the resin is a fast-curing resin.

In another preferred example, the fast-curing resin comprises a low-viscosity thermosetting resin or an in-situ polymerizable thermoplastic resin (for example, a resin selected from the group consisting of unsaturated resins, epoxy resins, vinyl ester resins, polyurethane resins , anionic ring-opening polymerized polyamide resin, or polycyclobutylene terephthalate resin.)

In another preferred example, the method has one or both of the following features:

(i) The step (2.2) includes the steps of: using 0.1-0.6 MPa injection pressure to inject the degassed fast-curing resin from the injection port and/or sucking or sucking the degassed resin from the injection port after vacuuming the mold. The quick-curing resin of the foam, after the resin flows out from the glue outlet, close the glue injection port and the glue outlet, so as to complete the resin infusion; and/or

(ii) The step (2.3) includes the steps of: after completing the pouring of the resin, curing the resin for 1-30min (preferably 5-20min or 5-15min) to obtain a cured car roof product, and then opening and demoulding , Take out the car roof products.

In the second aspect of the present invention, a mold for preparing an automobile roof is provided, the mold comprising: an upper mold, a lower mold, a glue injection port and a glue outlet;

Wherein, the lower mold is located below the upper mold, and when the lower mold and the upper mold are closed, the two jointly form a mold cavity, and the mold cavity is used to manufacture a car roof; The periphery of the mold cavity has a closed resin flow channel;

The injection port is used to pour resin, it is located on the side of the upper mold or the upper surface or the side of the lower mold, and communicates with the resin flow channel, and the injection port and the resin flow channel are located on the upper mold at the same time Or in the lower mold at the same time;

The glue outlet is used to discharge resin, it is located on the upper mold and runs through the upper mold.

In another preferred example, the width of the resin channel is 2-30mm (preferably 5±2mm), and the depth is 0.5-5mm (preferably 2±1mm).

In a third aspect of the present invention there is provided a system for producing an automotive roof comprising:

The first mold for the production of fiber preforms for automotive roof covers;

A second mold for preparing a car roof as described in the second aspect of the present invention;

Mechanical devices used to transfer materials; and

A demoulding device, said demoulding device comprising: (a) using a device with one or more suction cups; and/or (b) setting one or more ejector rods on the lower mold.

In another preferred example, the material is a raw material (such as a fiber fabric) for preparing an automobile roof or a fiber prefabricated part of an automobile roof.

In another preferred example, the mechanical device is used to: transfer the raw material (such as fiber fabric) used to prepare the automobile roof into the first mold; and/or transfer the fiber preform of the automobile roof into the The second mould.

It should be understood that within the scope of the present invention, the above-mentioned technical features of the present invention and the technical features specifically described in the following (such as embodiments) can be combined with each other to form new or preferred technical solutions. Due to space limitations, we will not repeat them here.

Description of drawings

Figure 1 is a schematic diagram of the process structure for making fiber-reinforced composite automotive roof fiber prefabricated parts.

Figure 2 is a schematic diagram of the process structure for making a fiber-reinforced composite car roof.

Figure 3 is a schematic diagram of the resin runner structure for making a fiber-reinforced composite car roof mold.

In the above figures, 1 is the lower mold, 2 is the sealing agent, 3 is the release agent, 4 is the fiber prefabricated body, 5 is the sealing strip, 6 is the upper mold, 7 is the injection port, and 8 is the glue outlet , 9 is a sealing groove, and 10 is a resin runner.

Detailed ways

After long-term and in-depth research, the inventor unexpectedly found that the preparation of the fiber prefabricated part of the automobile roof and the preparation of the automobile roof adopt independent molds, and the automobile roof is prepared by using a mold with a specific resin flow path, realizing the automobile The continuous automatic production method of the top cover significantly shortens the production cycle of the automobile top cover, greatly improves its production efficiency, and is suitable for industrialized production. The inventors have completed the present invention on this basis.

second mold

The "second mold" mentioned in the present invention refers to a mold used to prepare an automobile roof.

Now in conjunction with Fig. 2 and Fig. 3, the second mold of the present invention is described in further detail, which includes:

The second mold includes: an upper mold, a lower mold, a glue injection port, a resin runner and a glue outlet;

Wherein, the lower mold is located below the upper mold, and when the lower mold and the upper mold can be sealed and closed, the two together form a mold cavity, and the mold cavity is used to manufacture a car roof; There is a closed resin flow channel at the periphery of the mold cavity;

Preferably, the resin runners are located on the upper surface of the lower mold or the lower surface of the upper mold and are distributed around the cavity. The resin flow path is a closed flow path (as shown in FIG. 3 ).

In addition, the resin flow path can be in any shape such as rectangle (as shown in FIG. 3 ), square, etc.; the corners of the resin flow path can be arranged in a normal way such as right angle or arc. The top view shape of the connection between the resin flow channel and the injection port can adopt the arc shape as shown in Figure 3. It should be understood that the connection can also adopt any other suitable shape (such as square or pointed shape, etc.), so as to It is better to ensure that the injection port, the resin flow channel and the edge of the mold cavity can be connected.

Preferably, the resin channel has a width of 2-30mm (preferably 5±2mm), and a depth of 0.5-5mm (preferably 2±1mm).

The injection port is used to pour resin, it is located on the side of the upper mold or the upper surface or the side of the lower mold, and communicates with the resin flow channel, and the injection port and the resin flow channel are located on the upper mold at the same time Or both located under the mold.

The glue outlet is used to discharge resin, it is located on the upper mold and runs through the upper mold, and communicates with the mold cavity; preferably, the glue outlet is located away from the glue injection port and Slightly deviated from the center of the upper mold.

After the lower mold and the upper mold are closed, the resin enters the mold from the injection port and distributes in the entire resin flow channel, and then gradually fills the entire mold cavity. After the entire cavity is filled, the resin will flow out from the glue outlet to complete the entire injection process. The design of the resin flow channel reduces the number of injection ports while achieving uniform injection. Therefore, the molding cycle is shorter, the efficiency is higher, and the product quality is more stable.

In the "second mold" used herein, both the upper mold and the lower mold are made of hard materials (such as steel, aluminum, composite materials, wood, etc.).

first mold

The "first mold" in the present invention refers to the mold used to prepare the fiber preform of the automobile roof cover, which is basically the same as the second mold in the present invention, the difference is that the first mold is not It is equipped with a glue injection port, a resin flow channel and a glue outlet. Preferably, a mold as shown in FIG. 1 can be used, including an upper mold and a lower mold; the upper mold and the lower mold can be sealed and closed. When the upper mold and the upper mold are hermetically closed, they together form a mold cavity, and the mold cavity is used to manufacture the fiber prefabricated part of the automobile roof cover.

In the "first mold" used herein, the lower mold can be made of hard materials (such as steel, aluminum, composite materials, wood, etc.). The upper mold can be made of hard materials (such as steel, aluminum, composite materials, wood, etc.), or soft materials (such as silica gel, vacuum bag film, etc.).

production method

Now in conjunction with Fig. 1, Fig. 2 and Fig. 3, the production method of the present invention is described in further detail, the continuous automatic production method of the fiber-reinforced composite car roof cover of the present invention mainly includes the following steps:

(1) Preparation of automobile roof fiber prefabricated part 4:

After the fibrous fabric is shaped, cut the fibrous fabric; transfer the cut fibrous fabric to the first mold of the present invention through a mechanical device (such as a manipulator), close the mold, and pressurize (for example, pressurize to 5-20MPa; preferably ground to 8-15MPa) for a period of time (such as 5-60 seconds; preferably 10-30 seconds), then open the mold, demould, take out the fiber prefabricated part 4 of the car roof cover, and set it aside;

In another preferred example, said sizing fiber fabric includes the step of: spraying sizing agent or sizing powder on the fiber fabric. The sizing agent or sizing powder used in the present invention is a sizing agent or sizing powder commonly used in the art. For example, said setting agent or setting powder include: thermosetting type (such as epoxy resin type setting agent/powder, double horse resin type setting agent/powder) and thermoplastic type (such as polyisobutylene setting agent/powder, vinyl ether setting agent/powder) pink).

In another preferred example, the cutting of the fiber fabric includes the step of: cutting the fiber fabric according to the surface size of the first mold, so that the cut fiber fabric is suitable for the mold cavity of the fiber preform for manufacturing the automobile roof cover.

In another preferred example, when using a sizing powder or a sizing agent to set the fibrous fabric, according to the properties of the sizing powder or the sizing agent, before the cut fiber fabric is transferred to the first mold by a mechanical device, Heat the first mold (to a temperature that matches the setting agent), especially when the setting powder or setting agent is a medium-temperature setting powder or a medium-temperature setting agent, such as ES-T321. Of course, if a normal-temperature sizing agent is used, the first mold may not be subjected to heat treatment.

Preferably, the fiber fabric used in the present invention is a fabric formed of reinforcing fibers; preferably, the fiber fabric is selected from one or more of the following group: plain weave, twill weave, satin weave, unidirectional fabric, Multiaxial warp knitted fabrics and three-dimensional fabrics; and/or the fiber fabrics are glass fiber fabrics, carbon fiber fabrics, aramid fiber fabrics, basalt fiber fabrics, ceramic fiber fabrics, natural fiber fabrics, or combinations thereof.

Preferably, before the step (1), the preparation step of the first mold is also included: grinding and wiping the surface of the first mold, putting the sealing strip into the sealing groove of the first mold or putting at the periphery of the first mould.

(2) Preparation of the car roof:

(2.1) Transfer the fiber prefabricated part of the automobile roof cover prepared in step (1) into the second mold of the present invention through a mechanical device (such as a manipulator), and then close the molds.

(2.2) Inject and/or inhale the resin from the injection port, the resin enters the resin flow channel through the injection port, and enters the mold cavity through the resin flow channel. After filling the entire cavity, the resin flows out from the plastic outlet to complete the resin perfusion.

Preferably, the injection and/or suction of the resin from the injection port may include the following steps: (i) injecting the resin from the injection port with an injection pressure of 0.1-0.6 MPa; and/or (ii) pumping the second mold Inject or inhale the resin from the injection port after vacuuming, and close the injection port and the output port after the resin flows out from the injection port to complete the resin infusion.

(2.3) After the resin is poured, the resin is cured, and then the mold is opened and demoulded, and the car roof product is taken out.

Preferably, the curing time of the resin is 1-30 min (preferably 5-20 min or 5-15 min).

(2.4) Post-cure the car roof product prepared in step (2.3), and then perform trimming and grinding to obtain a fiber reinforced composite material car roof.

The resins used herein are preferably fast-curing resins comprising low-viscosity thermosetting resins or in-situ polymerizable thermoplastic resins (for example, resins selected from the group consisting of unsaturated resins, epoxy resins, vinyl ester resins , polyurethane resin, anionic ring-opening polymerized polyamide resin, or polycyclobutylene terephthalate resin).

Preferably, before described step (2.1), also comprise the preparation step of following second mould:

After polishing and wiping the surface of the second mold of the present invention, apply a sealing agent and a release agent successively on the surface of the second mold;

Then put the sealing strip into the sealing groove of the second mold or place it on the periphery of the second mold;

Connect the pipeline at the glue injection port and the glue outlet of the second mold;

Heating the second mold (eg heating to 60-200° C.; preferably 80-180° C.).

The sealing agent and the release agent used in the method of the present invention are commonly used sealing agents and release agents in the art. For example, the sealing agent includes: glyceride resin, phenolic resin, aluminum vinyl, epoxy resin, polyimide ammonia resin and other types; the release agent includes: silicon series (mainly including: siloxane Compound, silicone oil, silicone resin methyl branched silicone oil, methyl silicone oil, emulsified methyl silicone oil, hydrogen-containing methyl silicone oil, silicone grease, silicone resin, silicone rubber, silicone rubber toluene solution, etc.), wax series (mainly including: plant , animal, synthetic paraffin; microcrystalline paraffin; polyethylene wax, etc.), fluorine series (such as polytetrafluoroethylene, fluororesin powder, fluororesin coating, etc.), surfactant series (such as metal soap, EO or PO derivatives, etc. ) and other types.

In the production method of the present invention, the demoulding step can be assisted by a variety of demoulding devices, so that the obtained product (i.e., the fiber prefabricated part of the car roof or the car roof) is demolded from the mold without damage. The molding device may adopt (a) a device with one or more suction cups to suck out the manufactured product, thereby demoulding the product; or (b) one or more ejector pins are provided on the lower mold, and the ejector The ejection rod can be ejected upwards, so that the product can be released from the film. In the second mold, the center ejector rod preferably has a valve. After the mold is opened, compressed air is fed into the ejector rod with the valve, so that the product is demolded.

A continuous automatic production method for fiber-reinforced composite automobile roof provided by the present invention has the main advantages of:

The automobile roof produced by the automobile roof production method of the present invention not only maintains the rigidity, strength and other properties of the roof, but also achieves a weight reduction of more than 40% compared with the metal automobile roof, and has excellent mechanical properties.

The production method of the automobile top cover of the invention realizes the continuous automatic production method of the automobile top cover, and the production period is significantly shortened, the production efficiency is greatly improved, and it is suitable for industrialized production.

The second mold of the present invention realizes a single glue injection port and a single glue outlet through a glue injection port combined with a closed resin flow channel, and the glue injection is uniform, the mold filling efficiency is high, and the mold is easy to clean.

The present invention will be further described below in conjunction with specific implementation. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. For the experimental methods without specific conditions indicated in the following examples, the conventional conditions or the conditions suggested by the manufacturer are usually followed. Percentages and parts are by weight unless otherwise indicated. Unless otherwise specified, the raw materials used in the present invention are all commercially available.

The production method of embodiment 1 carbon fiber reinforced composite automobile roof cover

Step 1: Cleaning and preparation of the first mold

Provide the first mold for preparing the fiber prefabricated part of the automobile roof cover as shown in Fig. 1;

The surface of the lower mold 1 and the upper mold 6 of the first mold is polished smooth with 1000 mesh sandpaper, then the surface is wiped clean with alcohol or acetone, and the sealing strip 5 is put into the sealing groove around the lower mold 1.

Step 2: Preparation of fiber preforms for automotive roof

Spray a small amount of sizing agent (trade name: AIRTAC 2, purchased from Airtech Company) on the Toray T700-12K carbon fiber twill fabric to be cut, and then use the cutting machine to cut 4 pieces of carbon fiber cloth according to the surface size of the first mold, and put 4 pieces of carbon fiber cloth Transfer to the first mold processed by step 1 after being automatically stacked by a manipulator, then close the mold, pressurize at 9MPa for 10 seconds, open the mold and demould, take out the fiber prefabricated part of the car roof, and set it aside;

Step 3: Cleaning and preparation of the second mold

Provide the second mold that is used to prepare the car top cover shown in Figure 2;

The surface of the lower mold 1 and the upper mold 6 of the second mold is polished smooth with 1000 mesh sandpaper, and wiped clean with alcohol or acetone;

15Sealer，购自CHEM-TREND公司)；待封孔剂固化后然后在下模具1和上模具6表面均匀涂覆脱模剂3(商品名：

购自CHEM-TREND公司)，待脱膜剂干后再重复该操作2次；After the alcohol or acetone volatilize completely, evenly coat the sealing agent 2 (trade name:

15Sealer, purchased from CHEM-TREND company); after the sealing agent is cured, evenly coat the release agent 3 on the surface of the lower mold 1 and the upper mold 6 (trade name:

purchased from CHEM-TREND company), and repeat the operation 2 times after the release agent is dry;

Put the sealing strip 5 into the sealing groove of the lower mold and the upper mold, connect the glue injection port 7 and the glue outlet 8 of the second mold to the pipeline, and set aside, then heat the second mold to 85 degrees;

Step 4: Preparation of the car roof

The automobile roof fiber prefabricated part that step 2 makes is transferred in the second mold that is processed through step 3) by manipulator; Close the upper mold 6 and the lower mold 1 of the second mold; Adopt 0.2MPa injection pressure from the Fill the injection port 7 on the side of the lower mold with degassed fast-curing epoxy resin (trade name: EpoTech 167A: trade name: EpoTech 175B=100:21, mass ratio), and close the injection after the resin flows out from the exit port 8 mouth and glue outlet;

Step 5: Unmold

After the resin is cured for 10 minutes, the mold is opened, and the surface of the product is absorbed by a device with multiple suction cups, so that the product is released from the mold without damage, and the product is taken out;

Step 6: Car Roof Post-Processing

Put the product obtained in step 5 into an oven, perform post-curing treatment at 150 degrees for 1 hour, and then trim and polish to obtain a carbon fiber reinforced composite car roof.

The production method of embodiment 2 carbon fiber reinforced composite automobile roof cover

The preparation method is similar to Example 1, except that the following conditions are adopted:

In step 3, the second mold is heated to 150 degrees;

In step 4, the fiber prefabricated part of the roof cover made in step 2 is transferred to the second mold processed in step 3 by manipulator; The mold is evacuated to no higher than 2.4kPa, and then the defoamed anionic ring-opening polymerized polyamide 6 resin (caprolactam: caprolactam magnesium bromide: hexamethylene-1,6-di formyl caprolactam=97:1.0:2.0, molar ratio), and the resin flows out from the glue outlet 8 and closes the glue injection port and the glue outlet.

In step 6, post-cure the product at 150 degrees for 1 hour.

Embodiment 3 The production method of carbon fiber reinforced composite automobile roof cover

The preparation method is similar to Example 1, except that the following conditions are adopted:

An ejector rod with a valve is arranged at the center of the lower mold 1 of the second mold;

In step 5, after the resin is solidified for 10 minutes, the mold is opened, and 0.3 MPa compressed air is introduced from the ejector rod at the center of the lower mold 1 to release the product from the mold without damage, and take out the product.

In summary,

1. Compared with the metal car roof, the production method of the present invention adopts lightweight, high-performance fiber-reinforced composite material as the raw material for making the car roof, and the prepared roof maintains properties such as rigidity and strength. It also achieves a weight reduction of more than 40% on the top cover, and has excellent mechanical properties.

2. In the prior art, the same mold is usually used to successively prepare the fiber prefabricated part of the automobile roof and the automobile roof. Such a method has a long production cycle and low efficiency. And the production method of the present invention adopts the first mold and the second mold of the present invention respectively when preparing the automobile roof fiber prefabricated part and the automobile roof, and realizes the continuous automatic production method of the automobile roof, which significantly shortens the production time of the automobile roof. The production cycle of the top cover greatly improves its production efficiency and is suitable for industrial production.

3. Existing molds for preparing automotive roofs usually have multiple injection ports and outlets for injecting resin, and multiple injection ports and multiple outlets usually have uneven injection, increased processes, And mold cleaning is time-consuming and other defects. However, the second mold adopted in the production method of the present invention realizes a single injection port and a single glue outlet through a glue injection port and a closed resin flow channel, and has uniform glue injection, high mold filling efficiency, and easy cleaning of the mold. Etc.

All documents mentioned in this application are incorporated by reference in this application as if each were individually incorporated by reference. In addition, it should be understood that after reading the above teaching content of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

Claims (10)

1. A production method for a fiber-reinforced composite car roof, characterized in that, Include steps: (1) Preparation of automotive roof fiber prefabricated parts After the fiber fabric is shaped, the fiber fabric is cut; after the cut fiber fabric is transferred to the first mold for preparing the fiber prefabricated part of the car roof cover through a mechanical device, the mold is closed and pressurized; then the mold is opened, the mold is demoulded, and the car is taken out Top cover fiber preform, ready for use; (2) Preparation of car roof (2.1) after the automobile roof fiber prefabricated part that step (1) is made is transferred into the second mold that is used to prepare the automobile roof through a mechanical device, mold closing; The second mold includes: an upper mold, a lower mold, a glue injection port and a glue outlet; Wherein, the lower mold is located below the upper mold, and when the lower mold and the upper mold are closed, the two jointly form a mold cavity, and the mold cavity is used to manufacture a car roof; The periphery of the mold cavity has a closed resin flow channel; The injection port is used to pour resin, it is located on the side of the upper mold or the upper surface or the side of the lower mold, and communicates with the resin flow channel, and the injection port and the resin flow channel are located on the upper mold at the same time Or in the lower mold at the same time; The glue outlet is used to discharge resin, which is located on the upper mold and runs through the upper mold; (2.2) Inject and/or inhale the resin from the injection port, the resin enters the resin flow channel through the injection port, and then enters the mold cavity through the resin flow channel, thereby completing the resin infusion; (2.3) After completing the pouring of the resin, solidify the resin, then open the mold, demould, and take out the car roof product; (2.4) Post-cure the car roof product prepared in step (2.3), and then perform trimming and grinding to obtain a fiber reinforced composite material car roof. 2. the production method of fiber reinforced composite car roof as claimed in claim 1, is characterized in that, the described demoulding of step (1) or step (2.3), realizes by following demoulding device: (a) a device with one or more suction cups; and/or (b) One or more ejector pins provided on the lower mold. 3. The method for producing a fiber-reinforced composite car roof as claimed in claim 1, wherein the resin runner has a width of 2-30mm and a depth of 0.5-5mm. 4. the production method of fiber-reinforced composite automobile roof cover as claimed in claim 1, is characterized in that, In step (1), before the cut fiber fabric is transferred into the first mold by mechanical means, the first mold is heated; and/or In the step (2.1), the second mold is heated before the fiber preform of the roof cover of the automobile prepared in the step (1) is transferred into the second mold by a mechanical device. 5. The method for producing a fiber-reinforced composite car roof as claimed in claim 1, wherein said fiber fabric is a fabric formed of reinforcing fibers. 6. The production method of fiber-reinforced composite car roof as claimed in claim 1, characterized in that, in step (2.2), said injection and/or inhalation of resin from the injection port comprises the steps of: using 0.1- 0.6MPa injection pressure injects resin from the injection port; and/or sucks or inhales resin from the injection port after vacuuming the mold from the injection port. 7. The method for producing a fiber-reinforced composite car roof as claimed in claim 1, wherein said resin is a fast-curing resin. 8. The production method of fiber-reinforced composite car roof as claimed in claim 1, characterized in that, has one or both of the following characteristics: (i) The step (2.2) includes the steps of: using 0.1-0.6 MPa injection pressure to inject the degassed fast-curing resin from the injection port and/or sucking or sucking the degassed resin from the injection port after vacuuming the mold. The quick-curing resin of the foam, after the resin flows out from the glue outlet, close the glue injection port and the glue outlet, so as to complete the resin infusion; and/or (ii) The step (2.3) includes the steps of: curing the resin for 1-30 minutes to obtain a cured car roof product after the filling of the resin is completed, and then opening and demolding the car roof product. 9. A mold for preparing a car roof, characterized in that, the mold comprises: an upper mold, a lower mold, a glue injection port and a glue outlet; Wherein, the lower mold is located below the upper mold, and when the lower mold and the upper mold are closed, the two jointly form a mold cavity, and the mold cavity is used to manufacture a car roof; The periphery of the mold cavity has a closed resin flow channel; The injection port is used to pour resin, it is located on the side of the upper mold or the upper surface or the side of the lower mold, and communicates with the resin flow channel, and the injection port and the resin flow channel are located on the upper mold at the same time Or in the lower mold at the same time; The glue outlet is used to discharge resin, it is located on the upper mold and runs through the upper mold. 10. A system for producing a car roof, characterized in that it comprises: The first mold for the production of fiber preforms for automotive roof covers; The second mold for preparing a car roof as claimed in claim 9; Mechanical devices used to transfer materials; and A demoulding device, said demoulding device comprising: (a) using a device with one or more suction cups; and/or (b) setting one or more ejector rods on the lower mold.

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