CN112721243A - Rapid molding process for high-gloss product on surface of resin-based fiber composite material part - Google Patents
Rapid molding process for high-gloss product on surface of resin-based fiber composite material part Download PDFInfo
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- CN112721243A CN112721243A CN202011492643.4A CN202011492643A CN112721243A CN 112721243 A CN112721243 A CN 112721243A CN 202011492643 A CN202011492643 A CN 202011492643A CN 112721243 A CN112721243 A CN 112721243A
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- Prior art keywords
- resin
- mold
- adsorption
- sticking film
- product
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
- B29C33/68—Release sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
- B29C70/48—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs and impregnating the reinforcements in the closed mould, e.g. resin transfer moulding [RTM], e.g. by vacuum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
Abstract
The invention relates to a rapid molding process of a high-gloss product on the surface of a resin-based fiber composite material part, which comprises the following steps: firstly, arranging an anti-adhesion film: calculating the area of the required anti-sticking film according to the area of the workpiece, and adsorbing the anti-sticking film on the inner wall of the cavity of the mold through a plastic sucking machine; secondly, forming: laying a prepreg on the surface of an anti-sticking film, injecting molten plastic into a mold under the working condition of injection molding, closing the mold, and putting the mold into a hot pressing tank or a hot pressing machine for curing molding; thirdly, demolding: and (3) demolding the cured product after the mold is opened, and naturally separating the demolded finished product from the plastic film. The invention does not need to have higher requirement on the roughness of the die, can produce the product with high gloss surface, has little or no use of the release agent, and reduces the processing cost and the production cost of the die.
Description
Technical Field
The invention relates to the technical field of composite material part preparation, in particular to a rapid molding process of a high-gloss product on the surface of a resin-based fiber composite material part.
Background
The existing preparation of composite material parts needs a mold to ensure the outer profile of the parts, and two methods for obtaining a high-gloss composite material are available, wherein one method is a mirror surface mold; one is to polish and spray paint or gel coat on the surface of the demoulded workpiece. The mirror surface mold in the first method requires small mold surface roughness, large processing difficulty and very high mold cost which is about twice of the processing cost of a common mold; the surface post-treatment in the second method not only increases the processing cost, but also generates a large amount of dust in the treatment process to cause environmental pollution, and simultaneously, the fiber is damaged in the treatment process, thereby influencing the mechanical property of the product.
Disclosure of Invention
The applicant aims at the defects in the prior art and provides a resin-based fiber composite material part surface highlight product rapid molding process with a reasonable structure, so that the mold processing cost is reduced, the environmental pollution is reduced, and the labor cost is reduced.
The technical scheme adopted by the invention is as follows:
a resin-based fiber composite material part surface highlight product rapid molding process comprises the following steps:
firstly, arranging an anti-adhesion film: calculating the area of the required anti-sticking film according to the area of the workpiece, and adsorbing the anti-sticking film on the inner wall of the cavity of the mold through a plastic sucking machine;
secondly, forming: laying a prepreg on the surface of an anti-sticking film, injecting molten plastic into a mold under the working condition of injection molding, closing the mold, and putting the mold into a hot pressing tank or a hot pressing machine for curing molding;
thirdly, demolding: and (3) demolding the cured product after the mold is opened, and naturally separating the demolded finished product from the plastic film.
The thickness of the anti-sticking film is adjusted according to the structure of the cavity, and the thickness range of the anti-sticking film is 0.3-1 mm.
The control factors in the anti-sticking membrane adsorption process comprise adsorption pressure and ambient temperature, wherein the adsorption pressure range is 2-5 kpa, and the ambient temperature range is 40-300 ℃.
The anti-sticking film adsorption process adopts primary adsorption or secondary adsorption, the secondary adsorption process comprises coarse adsorption and secondary accurate adsorption, and the suction force of the coarse adsorption is smaller than that of the accurate adsorption.
In the secondary accurate adsorption process, the suction force is increased at the periphery of the die.
And spraying a release agent on the surface of the anti-sticking film.
The injection molding process is suitable for dry cloth injection resin or for chopped fiber-resin mixed liquor.
The dry part injection resin molding process includes: and (3) arranging the fiber dry cloth in the cavity, closing the mold, connecting the mold into RTM injection equipment for resin injection, and heating and curing the workpiece according to a resin curing process.
The prepreg is a thermosetting prepreg, a carbon fiber prepreg, a glass fiber prepreg or an aramid prepreg is adopted, dry cloth is carbon fiber dry cloth, glass fiber dry cloth or aramid dry cloth, injected thermosetting resin is epoxy resin, bismaleimide resin, vinyl resin or phenolic resin, injected thermoplastic resin is PP, PC or PPS, an anti-sticking film is a nylon or polyimide plastic film or a plastic film with temperature resistance higher than the curing temperature of the thermosetting resin and the hot melting temperature of the thermoplastic resin according to the actual curing temperature, and the inner wall of a mold cavity is a highlight surface.
The invention has the following beneficial effects:
the invention provides a novel preparation method of a resin-based composite material, namely, an anti-sticking film is adsorbed on the surface of a mould through a plastic suction machine, the roughness of the mould is not required to be higher, a product with a high gloss surface can be manufactured, the processing cost and the production cost of the mould are reduced, the demoulding agent is not required to be manually sprayed on the surface of the mould repeatedly for demoulding, the operations of removing resin residues and the like of the mould are not required to be carried out after the product is demoulded, only one layer is sprayed on the surface of a plastic film, and even the demoulding agent is not required to be sprayed on a workpiece with larger curvature, so that the cost is reduced, and the influences of the grinding and the demoulding agent on the environment and people are also reduced.
Because the invention is suitable for the molding working condition of the thermosetting plastic, the invention can even omit the step of spraying the release agent for some molds with simpler shapes and structures based on the characteristic of weak adhesion of the thermosetting plastic and the thermoplastic plastic, and the invention does not influence the release effect, reduces the dosage of the release agent and protects the environment.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Fig. 2 is a schematic view of the mold structure of the present invention.
Wherein: 1. a male mold; 2. a female die; 3. an anti-adhesion film; 4. and (5) manufacturing the product.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1, the process for rapidly forming a resin-based fiber composite material component with a high gloss product on the surface is suitable for forming a thermosetting plastic product, and comprises the following steps:
firstly, arranging an anti-adhesion film: calculating the area of the required anti-sticking film according to the area of the workpiece, and adsorbing the anti-sticking film on the inner wall of the cavity of the mold through a plastic sucking machine; calculating the area of the anti-sticking film according to the area of the workpiece, namely calculating the surface area of the workpiece or the inner wall of the cavity, and generally obtaining the surface area according to the sum of all small areas, which is the prior art and is not described herein; the suction molding is realized by fixing the mold on a suction molding platform, applying suction to the mold cavity and sucking the anti-sticking film on the inner wall of the mold cavity. In this example, a plastic film was used as the release film.
Secondly, forming: laying a prepreg on the surface of an anti-sticking film, injecting molten plastic into a mold under the working condition of injection molding, closing the mold, and putting the mold into a hot pressing tank or a hot pressing machine for curing molding;
thirdly, demolding: and (3) demolding the cured product after the mold is opened, and naturally separating the demolded finished product from the plastic film.
The thickness of the anti-sticking film is adjusted according to the structure of the cavity, and the thickness range of the anti-sticking film is 0.3-1 mm. The selectable node values in the embodiment are 0.3mm, 0.5mm, 0.7mm and 1mm, the specific thickness is selected according to the complexity of the inner wall of the cavity and the shape of a workpiece, and the anti-adhesion film is adsorbed on the inner wall of the cavity of the mold with the highlight surface.
The control factors in the anti-sticking membrane adsorption process comprise adsorption pressure and ambient temperature, wherein the adsorption pressure range is 2-5 kpa, and the ambient temperature range is 40-300 ℃. The thicker the anti-sticking film thickness is, the more complicated the surface shape of the molded product is, the larger the suction force is required, and the thinner the anti-sticking film is, the simpler the surface shape of the molded product is, the smaller the suction force is required.
Since the anti-sticking film is made of thermoplastic material, the ambient temperature is determined based on the ability to soften the anti-sticking film, and specifically, the node values of 40 ℃, 100 ℃, 150 ℃, 250 ℃ and the like can be selected according to the softening temperature of the anti-sticking film material.
The anti-sticking film adsorption process adopts primary adsorption or secondary adsorption, the primary adsorption is suitable for products with simple shapes, and the secondary adsorption is mostly adopted for products with complex shapes. The secondary adsorption process includes that the thick suction, the accurate absorption of secondary, and the suction that the thick suction is less than the accurate absorbent suction of secondary, because during the accurate absorption of secondary, need adsorb the anti-adhesion film in the less corner of size.
In order to facilitate the control of the position of the anti-sticking film and firmly fix the anti-sticking film on the inner wall of the mold cavity of the mold, the suction force is increased on the periphery of the mold in the secondary accurate adsorption process.
And spraying a release agent on the surface of the anti-sticking film. The release agent is equivalent to an optimization measure, the thermosetting material as a product and the thermoplastic material as an anti-adhesion film are not easy to adhere, and the small amount of the release agent is used for improving the release efficiency.
The injection molding process is suitable for dry cloth injection resin or for chopped fiber-resin mixed liquor.
The dry part injection resin molding process includes: and (3) arranging the fiber dry cloth in the cavity, closing the mold, connecting the mold into RTM injection equipment for resin injection, and heating and curing the workpiece according to a resin curing process.
The prepreg is a thermosetting prepreg, a carbon fiber prepreg, a glass fiber prepreg or an aramid prepreg is adopted, dry cloth is carbon fiber dry cloth, glass fiber dry cloth or aramid dry cloth, injected thermosetting resin is epoxy resin, bismaleimide resin, vinyl resin or phenolic resin, injected thermoplastic resin is PP, PC or PPS, an anti-sticking film is a nylon or polyimide plastic film or a plastic film with temperature resistance higher than the curing temperature of the thermosetting resin and the hot melting temperature of the thermoplastic resin according to the actual curing temperature, and the inner wall of a mold cavity is a highlight surface.
As shown in fig. 2, which is a schematic diagram of the mold assembly of the present invention, the size of the mold is the thickness of the plastic film which is set aside on the basis of the product. Fig. 2 shows a product molding process with one side having high light requirements, so that only one side of the mold cavity is required to be provided with an anti-sticking film, and in this embodiment, the female mold is subjected to vacuum forming and the anti-sticking film is arranged. If two surfaces of the product require high light, anti-sticking films are arranged on the inner walls of the female die and the male die; according to the practical situation, the anti-sticking film is arranged on the core, so that each wall surface of the molded product meets the highlight requirement.
The above description is intended to be illustrative and not restrictive, and the scope of the invention is defined by the appended claims, which may be modified in any manner within the scope of the invention.
Claims (9)
1. A resin-based fiber composite material part surface highlight product rapid molding process is characterized in that: the method comprises the following steps:
firstly, arranging an anti-sticking film (3): calculating the area of the required anti-sticking film (3) according to the area of the workpiece (4), and adsorbing the anti-sticking film (3) on the inner wall of the mold cavity through a plastic sucking machine;
secondly, forming: laying a prepreg on the surface of an anti-sticking film (3), injecting molten plastic into a mold under an injection molding working condition, closing the mold, and putting the mold into a hot pressing tank or a hot pressing machine for curing and molding;
thirdly, demolding: and (3) demolding the cured product after the mold is opened, and naturally separating the demolded finished product from the plastic film.
2. The process for rapid prototyping of a high gloss product on the surface of a resin-based fiber composite material part as set forth in claim 1, wherein: the thickness of the anti-sticking film (3) is adjusted according to the structure of the cavity, and the thickness range of the anti-sticking film (3) is 0.3-1 mm.
3. The process for rapid prototyping of a high gloss product on the surface of a resin-based fiber composite material part as set forth in claim 1, wherein: the control factors in the adsorption process of the anti-sticking film (3) comprise adsorption pressure and ambient temperature, the adsorption pressure range is 2-5 kpa, and the ambient temperature range is 40-300 ℃.
4. The process for rapid prototyping of a high gloss product on the surface of a resin-based fiber composite material part as set forth in claim 1, wherein: the adsorption process of the anti-sticking film (3) adopts primary adsorption or secondary adsorption, the secondary adsorption process comprises coarse adsorption and secondary accurate adsorption, and the suction force of the coarse adsorption is smaller than that of the accurate adsorption.
5. The process for rapid prototyping of high gloss articles on the surface of a resin-based fiber composite material part as set forth in claim 4, wherein: in the secondary accurate adsorption process, the suction force is increased at the periphery of the die.
6. The process for rapid prototyping of high gloss articles on the surface of a resin-based fiber composite material part as set forth in claim 4, wherein: and a release agent is sprayed on the surface of the anti-sticking film (3).
7. The process for rapid prototyping of a high gloss product on the surface of a resin-based fiber composite material part as set forth in claim 1, wherein: the injection molding process is suitable for dry cloth injection resin or for chopped fiber-resin mixed liquor.
8. The process for rapid prototyping of a high gloss product on the surface of a resin-based fiber composite part of claim 7 wherein: the dry part injection resin molding process includes: and (3) arranging the fiber dry cloth in the cavity, closing the mold, connecting the mold into RTM injection equipment for resin injection, and heating and curing the workpiece (4) according to a resin curing process.
9. The process for rapid prototyping of a high gloss product on the surface of a resin-based fiber composite part of claim 8 wherein: the prepreg is a thermosetting prepreg, a carbon fiber prepreg, a glass fiber prepreg or an aramid prepreg is adopted, dry cloth is carbon fiber dry cloth, glass fiber dry cloth or aramid dry cloth, injected thermosetting resin is epoxy resin, bismaleimide resin, vinyl resin or phenolic resin, injected thermoplastic resin is PP, PC or PPS, an anti-sticking film (3) is a nylon or polyimide plastic film or a plastic film with temperature resistance higher than the curing temperature of the thermosetting resin and the hot melting temperature of the thermoplastic resin according to the actual curing temperature, and the inner wall of a mold cavity is a highlight surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011492643.4A CN112721243A (en) | 2020-12-17 | 2020-12-17 | Rapid molding process for high-gloss product on surface of resin-based fiber composite material part |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011492643.4A CN112721243A (en) | 2020-12-17 | 2020-12-17 | Rapid molding process for high-gloss product on surface of resin-based fiber composite material part |
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| CN112721243A true CN112721243A (en) | 2021-04-30 |
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| CN202011492643.4A Pending CN112721243A (en) | 2020-12-17 | 2020-12-17 | Rapid molding process for high-gloss product on surface of resin-based fiber composite material part |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101870176A (en) * | 2009-04-24 | 2010-10-27 | 昆山同寅兴业机电制造有限公司 | Processing techniques of carbon fiber products and glass fiber products |
| CN102815064A (en) * | 2012-09-14 | 2012-12-12 | 厦门新旺工贸有限公司 | Breathing-releasing protection film for composite material moulding |
| CN103182767A (en) * | 2011-12-27 | 2013-07-03 | 山田尖端科技株式会社 | Method for resin molding and resin molding apparatus |
| CN109693396A (en) * | 2019-01-11 | 2019-04-30 | 厦门碳帝复合材料科技有限公司 | A kind of mould pressing process of carbon fiber sole |
| CN110561784A (en) * | 2019-09-03 | 2019-12-13 | 江苏亨睿碳纤维科技有限公司 | Autoclave molding method for double-sided smooth composite material |
-
2020
- 2020-12-17 CN CN202011492643.4A patent/CN112721243A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101870176A (en) * | 2009-04-24 | 2010-10-27 | 昆山同寅兴业机电制造有限公司 | Processing techniques of carbon fiber products and glass fiber products |
| CN103182767A (en) * | 2011-12-27 | 2013-07-03 | 山田尖端科技株式会社 | Method for resin molding and resin molding apparatus |
| CN102815064A (en) * | 2012-09-14 | 2012-12-12 | 厦门新旺工贸有限公司 | Breathing-releasing protection film for composite material moulding |
| CN109693396A (en) * | 2019-01-11 | 2019-04-30 | 厦门碳帝复合材料科技有限公司 | A kind of mould pressing process of carbon fiber sole |
| CN110561784A (en) * | 2019-09-03 | 2019-12-13 | 江苏亨睿碳纤维科技有限公司 | Autoclave molding method for double-sided smooth composite material |
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Application publication date: 20210430 |
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