CN114872268A - Method for combining carbon fiber plate and plastic part and corresponding molded product - Google Patents
Method for combining carbon fiber plate and plastic part and corresponding molded product Download PDFInfo
- Publication number
- CN114872268A CN114872268A CN202110160593.8A CN202110160593A CN114872268A CN 114872268 A CN114872268 A CN 114872268A CN 202110160593 A CN202110160593 A CN 202110160593A CN 114872268 A CN114872268 A CN 114872268A
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- Prior art keywords
- carbon fiber
- fiber plate
- plastic part
- temperature
- plastic
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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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/1418—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
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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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
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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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/1418—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
- B29C2045/14237—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure the inserts being deformed or preformed outside the mould or mould cavity
Abstract
The invention relates to the technical field of carbon fiber plate processing, in particular to a method for combining a carbon fiber plate and a plastic part and a corresponding formed product. The bonding method comprises the following steps: pre-cutting the first part of the carbon fiber plate; heating a first part carbon fiber plate and a second part plastic part, wherein the first part carbon fiber plate is heated to a surface softening state; and carrying out hot-pressing and laminating on the carbon fiber plate and the plastic part in the mold. According to the method for combining the carbon fiber plate and the plastic part and the corresponding formed product, the carbon fiber plate and the plastic part can be tightly combined without using glue, the manufacturing process is simple, the binding force between the carbon fiber plate and the plastic part is strong and can reach more than 5B, and the corresponding formed product can reach the required strength.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of carbon fiber plate processing, in particular to a method for combining a carbon fiber plate and a plastic part and a corresponding formed product.
[ background of the invention ]
With the development of electronic and electrical devices and information devices such as notebook computers, tablet computers, cellular phones, portable information terminals, and cameras, there is a strong demand in the market for thin and lightweight molded articles. Thin and light molded products require thin wall and light weight of housing parts constituting the molded products, and also require high strength and high rigidity.
The carbon fiber board is widely applied to electronic forming products such as military industry, automobiles, electronic appliances and the like due to the advantages of light weight, high strength and the like. In the prior art, after a carbon fiber plate is generally subjected to hot pressing forming, the carbon fiber plate is embedded in a mold and is subjected to injection molding to form a plastic part. However, the carbon fiber plate and the plastic part formed by the method have poor bonding performance, and a special structure is required to be added at the design end of the formed product to fix the plastic part and the plate, for example, special glue is used, and glue is dispensed at the joint of the plastic part and the plate to enable the bonding force to reach the required strength, so that the method has complex manufacturing process; moreover, when the carbon fiber plate with complicated geometry is embedded, the process of combining the carbon fiber plate and the plastic part is more unstable.
In view of the above, it is necessary to develop a method for combining a carbon fiber plate and a plastic part to solve the above problems.
[ summary of the invention ]
Therefore, an object of the present invention is to provide a method for bonding a carbon fiber plate to a plastic part, which has a simple process and a strong bonding force between the carbon fiber plate and the plastic part, and can achieve a desired strength of a corresponding molded product.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for combining a carbon fiber plate and a plastic part comprises the following steps:
(1) pre-cutting the first part of the carbon fiber plate;
(2) heating a first part carbon fiber plate and a second part plastic part, wherein the first part carbon fiber plate is heated to a surface softening state;
(3) and carrying out hot-pressing and laminating on the carbon fiber plate and the plastic part in the mold.
Further, the resin used in the carbon fiber sheet is a thermoplastic resin, and the carbon fiber sheet is heated to a temperature between the glass transition temperature and the melting temperature of the thermoplastic resin.
Further, the resin used in the carbon fiber sheet is a thermosetting resin, and the carbon fiber sheet is heated to a temperature equal to or higher than the pre-curing temperature of the thermosetting resin.
Furthermore, the plastic part is made of thermoplastic plastics.
Further, in the step (2), an infrared heating device and/or a high-speed high-temperature forming device is/are used for heating the carbon fiber plate.
Further, in the step (2), a high-speed high-temperature forming device is adopted to heat the plastic part.
Further, after the step (3), the method further comprises the steps of: and in an injection mold, performing injection molding on the carbon fiber plate and the plastic part subjected to hot pressing and attaching to form a third part.
Furthermore, the third part covers the outer parts of the first part carbon fiber plate and the second part plastic part.
In addition, the invention also provides a molded product produced by the method for combining the carbon fiber plate and the plastic part.
Compared with the prior art, the method for combining the carbon fiber plate and the plastic part and the corresponding formed product thereof have the advantages that the carbon fiber plate and the plastic part are heated, the surface of the carbon fiber plate is heated to be in a softened state, the surface of the carbon fiber plate is enabled to generate viscosity, the carbon fiber plate is combined with the plastic part while being molded by the temperature and the pressure of the mold, the carbon fiber plate and the plastic part can be tightly combined without glue, the manufacturing process is simple, the bonding force between the carbon fiber plate and the plastic part is strong, the bonding force can reach more than 5B, and the corresponding formed product can reach the required strength.
[ description of the drawings ]
FIG. 1 is a flow chart showing a method for bonding a carbon fiber plate and a plastic part according to the present invention.
FIG. 2 is a flow chart showing the method for bonding a carbon fiber plate and a plastic part according to the present invention in a preferred embodiment.
FIG. 3 is a flow chart showing a method for bonding a carbon fiber plate and a plastic part according to another preferred embodiment of the present invention.
[ detailed description ] embodiments
For a further understanding of the objects, technical effects and technical means of the present invention, reference will now be made in detail to the following description taken in conjunction with the accompanying drawings.
Referring to fig. 1, fig. 1 is a flow chart illustrating a method for bonding a carbon fiber plate and plastic according to the present invention. The invention provides a method for combining a carbon fiber plate and a plastic part, which comprises the following steps:
step S100: pre-cutting the first part of the carbon fiber board according to the shape of a product to be manufactured to obtain a required size;
step S200: heating a first part carbon fiber plate and a second part plastic part, wherein the first part carbon fiber plate is heated to a surface softening state, so that the surface of the carbon fiber plate generates viscosity;
step S300: and in the mold, hot-pressing and attaching the carbon fiber plate and the plastic part by using the temperature and the pressure of the mold, wherein the mold is an injection mold or a hot-pressing mold.
Wherein the resin used in the carbon fiber plate is thermoplastic resin, the carbon fiber plate is heated to a temperature between the glass transition temperature and the melting temperature of the thermoplastic resin, and the plate is in a softened state at the moment, but no molten liquid drips; the resin used in the carbon fiber plate is thermosetting resin, and the carbon fiber plate is heated to a temperature higher than the pre-curing temperature of the thermosetting resin.
The plastic part is made of thermoplastic plastic, the plastic part is heated to a temperature between the glass transition temperature and the melting temperature of the plastic part, and the plastic part can be a clamping hook, a convex column and other structural parts.
In step S200, an infrared heating device and/or a high-speed high-temperature forming device is used to heat the carbon fiber plate. Specifically, the infrared heating device can be an infrared baking tray, a plurality of infrared light tubes arranged in sequence are arranged at the bottom of the infrared baking tray, the distance between the infrared light tubes is not adjustable, the distance between the surface of the carbon fiber plate and the baking tray is adjusted by utilizing the distance between the baking tray and the mold, the wavelength used by the infrared light tubes is the same as the wavelength of resin used by the carbon fiber plate, and the heating efficiency can be improved. Placing the cut carbon fiber plate into an oven for infrared heating, quickly raising the temperature of the surface of the plate to be between the glass transition temperature and the melting temperature of resin used by the plate or above the pre-curing temperature, and then placing the carbon fiber plate into a mold; or placing the cut carbon fiber plate into an infrared baking tray for infrared heating to a preset temperature, then placing the carbon fiber plate into a mold for continuous heating until the temperature of the surface of the plate is raised to be between the glass transition temperature and the melting temperature of the resin used by the plate or above the pre-curing temperature.
In step S200, the plastic part is heated by using a high-speed high-temperature forming device, that is, the plastic part is placed in a mold having the high-speed high-temperature forming device, so that the surface temperature of the plastic part is raised to a temperature between the glass transition temperature and the melting temperature of the material of the plastic part, and the surface of the plastic part is in a microsoft state.
After step S300, step S400 is further included: and in an injection mold, performing injection molding on the carbon fiber plate and the plastic part subjected to hot pressing and attaching to form a third part. The step S400 may specifically include embedding the carbon fiber plate and the plastic part to be hot-pressed and attached in an injection mold, closing the mold, hot-pressing and attaching the carbon fiber plate and the plastic part, expanding the carbon fiber plate and the plastic part after hot-pressing and attaching, closing the mold again in the injection mold, and injecting a molten plastic material to form the third part. The step S400 may further include embedding the carbon fiber plate and the plastic part to be hot-pressed and attached in a hot-pressing mold, closing the mold, hot-pressing and attaching the carbon fiber plate and the plastic part, placing the attached carbon fiber plate and the attached plastic part in an injection mold, and injecting a molten plastic material to form the third component. The third part is coated outside the first part carbon fiber plate and the second part plastic part.
Reference will now be made in detail to the following examples
Example 1
The resin used in the first part of the carbon fiber board is thermoplastic PC resin, and the second part of the plastic part is thermoplastic PC resin, so as to mold a part product of the notebook computer.
In S101, the first carbon fiber sheet is cut into desired dimensions, such as a length of 350mm, a width of 255mm, and a thickness of 1.5 mm. Wherein the holes on the plate are milled or blanked.
In S102, a first part of the carbon fiber plate is placed in an infrared baking tray to be heated, and the surface of the carbon fiber plate is quickly heated to a preset temperature; and (3) placing the first part carbon fiber plate and the second part plastic part in a mold with a high-speed high-temperature forming device for heating, wherein the surface temperature of the mold reaches over 200 ℃, so that the carbon fiber plate is heated to 200 ℃ to be in a surface softening state, and the surface of the plastic part is slightly softened.
In S103, the mold is closed to lock a high pressure, which may be in a range of 1000 n/cm to 1500 n/cm, so that the heated carbon fiber sheet is not only pressed into a desired three-dimensional shape, but also tightly combined with the plastic part.
In S104, the mold is opened, and the combined molded article is taken out, and one cycle is completed.
Example 2
Taking the resin used in the first part carbon fiber board as thermosetting resin epoxy resin, and the second part plastic part as PC resin, the molded notebook computer D-piece product is taken as an example.
In S101, the first carbon fiber sheet is cut into desired dimensions, such as a length of 350mm, a width of 255mm, and a thickness of 1.0 mm. Wherein the holes on the plate are milled or blanked.
In S102, the first component of the carbon fiber plate and the second component of the plastic part are placed in an injection mold with a high-speed and high-temperature forming device to be heated, the surface temperature of the mold rapidly reaches above 160 ℃, so that the surface temperature of the carbon fiber plate is rapidly raised to above 160 ℃.
In S103, the mold is closed to lock a high pressure, which may be in a range of 1000 n/cm to 1500 n/cm, the heated carbon fiber sheet is pressed into a desired three-dimensional shape, and with the continuous temperature rise and curing of the high-speed high-temperature forming device, the epoxy resin in the carbon fiber sheet flows to the surface of the plastic part, the plastic part and the carbon fiber sheet are tightly bonded, and the bonding force can reach a level of 5B or more.
In S104, the injection mold with the high-speed and high-temperature molding apparatus is expanded and then closed again, and a molten plastic material is injected to mold a third part, wherein the third part covers the outer portions of the first part carbon fiber plate and the second part plastic part.
In S105, the mold is opened, and the molded article is taken out, and one cycle is completed.
In addition, the present invention further provides a molded product produced by the method for combining the carbon fiber plate and the plastic part, wherein the molded product is formed by hot-pressing and attaching the carbon fiber plate and the plastic part, and the molded product can be a housing of an electronic and electrical device or an information device, such as a notebook computer, a tablet computer, a portable phone, a portable terminal or a camera.
In summary, according to the method for bonding the carbon fiber plate and the plastic part and the corresponding molded product thereof of the present invention, the carbon fiber plate is heated to a surface softening state by heating the carbon fiber plate and the plastic part, so that the surface of the carbon fiber plate is sticky, and the carbon fiber plate is bonded to the plastic part while being molded by using the temperature and pressure of the mold, so that the carbon fiber plate and the plastic part can be tightly bonded without using glue, the manufacturing process is simple, the bonding force between the carbon fiber plate and the plastic part is strong, the bonding force can reach more than 5B, and the corresponding molded product can reach the required strength.
Claims (9)
1. A method for combining a carbon fiber plate and a plastic part is characterized by comprising the following steps:
(1) pre-cutting the first part of the carbon fiber plate;
(2) heating a first part carbon fiber plate and a second part plastic part, wherein the first part carbon fiber plate is heated to a surface softening state;
(3) and carrying out hot-pressing and laminating on the carbon fiber plate and the plastic part in the mold.
2. The method of claim 1, wherein the resin used in the carbon fiber sheet is a thermoplastic resin, and the carbon fiber sheet is heated to a temperature between the glass transition temperature and the melting temperature of the thermoplastic resin.
3. The method of claim 1, wherein the resin used in the carbon fiber sheet is a thermosetting resin, and the carbon fiber sheet is heated to a temperature higher than a pre-curing temperature of the thermosetting resin.
4. The method of claim 1, wherein the plastic part is made of thermoplastic plastic.
5. The method of claim 1, wherein in the step (2), the carbon fiber sheet is heated by an infrared heating device and/or a high-speed high-temperature forming device.
6. The method of claim 1, wherein in the step (2), the plastic part is heated by a high-speed high-temperature forming device.
7. The method for combining a carbon fiber plate with a plastic part, according to claim 1, further comprising, after the step (3), the steps of: and in an injection mold, performing injection molding on the carbon fiber plate and the plastic part subjected to hot pressing and attaching to form a third part.
8. The method of claim 7, wherein the third part covers the outer surfaces of the first part, the carbon fiber plate and the second part, and the plastic part.
9. A molded article produced by the method of bonding the carbon fiber sheet according to any one of claims 1 to 8 to a plastic member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110160593.8A CN114872268A (en) | 2021-02-05 | 2021-02-05 | Method for combining carbon fiber plate and plastic part and corresponding molded product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110160593.8A CN114872268A (en) | 2021-02-05 | 2021-02-05 | Method for combining carbon fiber plate and plastic part and corresponding molded product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114872268A true CN114872268A (en) | 2022-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110160593.8A Pending CN114872268A (en) | 2021-02-05 | 2021-02-05 | Method for combining carbon fiber plate and plastic part and corresponding molded product |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105291372A (en) * | 2015-09-30 | 2016-02-03 | 上汽通用汽车有限公司 | Hot pressing injection mold and processing technology for integrally molding fibrilia plate and surface layer |
| CN107042605A (en) * | 2016-02-05 | 2017-08-15 | 汉达精密电子(昆山)有限公司 | The preparation method of thermoplastic composite product and its corresponding product |
| CN110001034A (en) * | 2018-01-05 | 2019-07-12 | 汉达精密电子(昆山)有限公司 | Folding mechanism member product and its forming method |
-
2021
- 2021-02-05 CN CN202110160593.8A patent/CN114872268A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105291372A (en) * | 2015-09-30 | 2016-02-03 | 上汽通用汽车有限公司 | Hot pressing injection mold and processing technology for integrally molding fibrilia plate and surface layer |
| CN107042605A (en) * | 2016-02-05 | 2017-08-15 | 汉达精密电子(昆山)有限公司 | The preparation method of thermoplastic composite product and its corresponding product |
| CN110001034A (en) * | 2018-01-05 | 2019-07-12 | 汉达精密电子(昆山)有限公司 | Folding mechanism member product and its forming method |
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