CN111216305A - Method for combining metal and plastic and product thereof - Google Patents
Method for combining metal and plastic and product thereof Download PDFInfo
- Publication number
- CN111216305A CN111216305A CN201811412897.3A CN201811412897A CN111216305A CN 111216305 A CN111216305 A CN 111216305A CN 201811412897 A CN201811412897 A CN 201811412897A CN 111216305 A CN111216305 A CN 111216305A
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- China
- Prior art keywords
- metal
- plastic
- coating material
- bonding method
- metal substrate
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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
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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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/18—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
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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
- B29C2045/1486—Details, accessories and auxiliary operations
- B29C2045/14868—Pretreatment of the insert, e.g. etching, cleaning
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The invention relates to the field of metal surface treatment, in particular to a metal and plastic bonding method and a product thereof. The metal and plastic bonding method comprises the following steps: loading the coating material into a spray tool; spraying the coating material on the surface of the metal base material by a spraying tool, and generating a coating on the surface of the metal base material; and molding the plastic on the metal substrate. The metal and plastic bonding method and the product thereof have small influence on the surface of the metal material, the coating ensures strong bonding between the metal and the plastic, high-density bonding between the metal and the plastic is realized, the process stability is high, and the automatic production is easy.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the field of metal surface treatment, in particular to a metal and plastic bonding method and a product thereof.
[ background of the invention ]
NMT (Nano-Molding Technology) is a process for combining metal and plastic by a nanotechnology, wherein the surface of the metal is subjected to nanocrystallization, and the plastic is directly injection-molded on the surface of the metal, so that the metal and the plastic can be integrally molded.
More specifically, referring to fig. 1 to 5, fig. 1 is a schematic view of a metal substrate, fig. 2 is a schematic view of a metal substrate after alkali treatment in the conventional NMT technology, fig. 3 is a schematic view of a metal substrate after cleaning and drying after alkali treatment in the conventional NMT technology, fig. 4 is a schematic view of a metal substrate after acid treatment in the conventional NMT technology, and fig. 5 is a schematic view of a metal substrate after immersion treatment in the conventional NMT technology. The specific procedures of the NMT technology are as follows: (1) alkali treatment: cleaning impurities such as grease 11 on the surface of the metal base material 10 by using alkali liquor, and then cleaning and drying; (2) acid treatment: removing the metal oxide layer by using acid liquor, activating the metal oxide layer, and corroding the surface of the metal substrate 10 to form nano holes 12 with a large coral reef-like structure; (3) soaking the metal base material 10 by using a special solution to form small nano holes 13 on the surface of the metal base material; (4) washing and drying the metal base material 10; (5) the metal substrate 10 is put into a mold to perform injection molding of plastic, so that the resin enters the small nano holes 13 to be cured, thereby achieving the purpose of strong bonding.
Therefore, the NMT technology not only can give consideration to the appearance and the texture of metal, but also can simplify the design of a mechanism part of a product, so that the product is lighter, thinner, shorter and smaller, and has more cost benefit than a CNC (machining) construction method. At present, the NMT technique for bonding aluminum and plastic has been expanded to be applied to copper, magnesium alloy, etc.
However, the NMT method is a wet process, and the used chemical components are complex, and a large amount of wastewater needs to be discharged, which is not favorable for environmental protection; in addition, the NMT method uses a complicated chemical composition due to the wet process, and is not easy to manage and is liable to cause poor stability.
In addition, the metal and the plastic can be combined through a chew structure, as shown in fig. 6 and 7, fig. 6 is a schematic view of a chew structure in the prior art, and fig. 7 is another schematic view of the chew structure in the prior art. The zipper-type structure 20 is used to combine metal and plastic in the figure 6, and the through-hole 21 is used to combine metal and plastic in the figure 7. However, this method has problems that the working hours are extremely long if CNC engraving is used; secondly, if the die casting or the injection molding is adopted, the die processing becomes complicated; thirdly, the plastic flowing is poor due to the glue-biting structure, the unsaturated material or the follow-up baking shrinkage can be caused, the zipper mark on the appearance is not easy to cover, and the difficulty in making the integrated zipper is increased.
In view of the above, it is necessary to develop a method for bonding metal and plastic and a product thereof to solve the above problems.
[ summary of the invention ]
Therefore, an object of the present invention is to provide a method for bonding metal and plastic, which is a dry process, is environmentally friendly, and can tightly bond metal and plastic.
In order to achieve the above object, the metal and plastic bonding method of the present invention comprises the following steps:
(1) loading the coating material into a spray tool;
(2) heating the coating material to a plastic or molten state, and then spraying the coating material on the surface of the metal base material by a spraying tool to generate a coating on the surface of the metal base material;
(3) and molding the plastic on the metal substrate.
Optionally, the coating material has a nano-scale or micro-scale particle size, and comprises a cross-linking agent and metal powder, wherein the addition amount of the cross-linking agent is 5% -20% of the coating material.
Optionally, the crosslinking agent is dicumyl peroxide, benzoyl peroxide, di-t-butyl peroxide, dicumyl hydroperoxide.
Optionally, the metal powder has a melting point above 500 ℃.
Optionally, the metal powder is titanium carbide, aluminum, or chromium.
Optionally, the metal powder is irregularly shaped.
Optionally, the spray tool is a spray gun.
Optionally, in the step (2), the coating material is sprayed on the surface of the metal substrate in a plasma spray welding manner or a laser cladding manner.
Optionally, when the plastic is a thermosetting plastic, the plastic is hot-pressed on the metal substrate; when the plastic is thermoplastic, the plastic is injection molded on the metal substrate.
In addition, the invention also provides a product produced by the metal and plastic combination method.
Compared with the prior art, the metal and plastic bonding method and the product thereof have the advantages that the bonding method is a dry process and does not need to adopt a medicament by spraying the coating material in a plastic or molten state on the surface of the metal substrate and then bonding the plastic on the metal substrate, so that the bonding method has no environmental problem of waste water discharge and is environment-friendly; the plastic and the metal can be tightly combined without designing a complex chew structure, which is different from the chew structure in the prior art; the product can be applied to electronic product areas needing radio frequency emission, such as notebook computer backshells, various articles partially needing plastic as an insulating part, articles needing air tightness test, and the like. Therefore, the metal and plastic bonding method and the product thereof have small influence on the surface of the metal material, the coating layer ensures that the bonding property between the metal and the plastic is strong, the high-density bonding between the metal and the plastic is realized, the process stability is high, and the automatic production is easy.
[ description of the drawings ]
FIG. 1 is a schematic view of a metal substrate.
Fig. 2 is a schematic diagram of a metal substrate after alkali treatment in the prior art NMT.
Fig. 3 is a schematic diagram of a metal substrate cleaned and dried after an alkaline treatment in the prior art NMT.
Fig. 4 is a schematic diagram of a metal substrate after acid treatment in the prior art NMT.
Fig. 5 is a schematic diagram of a metal substrate after a soaking treatment in the prior art NMT.
FIG. 6 is a schematic diagram of a prior art chew structure.
Fig. 7 is another schematic diagram of a prior art chew structure.
FIG. 8 is a schematic view of the metal and plastic bonding method of the present invention before spraying.
FIG. 9 is a schematic diagram of the metal and plastic bonding method of the present invention after spraying.
FIG. 10 is a micro-scale view of the metal substrate coating in the metal and plastic bonding method of the present invention.
FIG. 11 is another micro-view of the metal substrate coating in the metal and plastic bonding method of the present invention.
[ detailed description ] embodiments
For further understanding of the objects, technical effects and technical means of the present invention, reference will now be made to the following embodiments. Referring to fig. 8 to 11, fig. 8 is a schematic view of fig. 8 before spraying in the metal and plastic bonding method of the present invention, fig. 9 is a schematic view of fig. 10 after spraying in the metal and plastic bonding method of the present invention, fig. 11 is a microscopic view of a metal substrate coating in the metal and plastic bonding method of the present invention, and fig. 11 is another microscopic view of the metal substrate coating in the metal and plastic bonding method of the present invention.
In this embodiment, the metal and plastic bonding method of the present invention includes the following steps:
step S100: loading the coating material 200 into a spray tool, which may be a spray gun;
step S200: heating the coating material 200 to a plastic or molten state, and then spraying the coating material 200 in the plastic or molten state on the surface of the metal substrate 100 by a spraying tool, wherein the surface of the metal substrate 100 generates a coating 300, and the coating 300 has a relatively small hole structure 301 for bonding plastics;
step S300: the plastic is molded on the metal substrate 100, and the plastic enters the rugged hole structure 301 for curing, so as to achieve the purpose of tightly combining the metal and the plastic.
The particle size of the coating material 200 is nano-scale or micro-scale, so that the generated coating 300 contains a nano-scale or micro-scale microstructure, so that plastic and the metal substrate 100 are tightly combined, and the particle size can be adjusted according to different materials of the metal substrate 100 and the plastic which need to be combined; the coating material 200 contains a cross-linking agent and metal powder, wherein the addition amount of the cross-linking agent is 5% -20% of the coating material, and the composition of the coating material 200 can be adjusted according to different materials of the metal substrate 100 and the plastic.
When the metal substrate 100 is bonded with plastic, the cross-linking agent generates chemical bonds among linear molecules of the plastic, so that the linear molecules are mutually connected to form a net structure, and the metal substrate 100 is more tightly bonded with the plastic.
The metal powder has a melting point higher than 500 ℃, is a high-melting-point metal powder, is preferably made of metal materials such as titanium carbide, aluminum or chromium, and can enable the coating material 200 to be tightly fused on the metal substrate 100 when the coating material 200 is sprayed by selecting the high-melting-point metal powder.
The metal powder is irregular, for example, may be in the shape of a round spur, a spherical barb, etc., and is similar to a coral reef, and the irregular shape allows plastic to enter, thereby effectively providing a force for bonding the plastic to the metal substrate 100.
In step S200, the coating material 200 is sprayed on the surface of the metal substrate 100 in a plasma spray welding manner or a laser cladding manner. A laser cladding method is preferably selected, specifically, a high-energy-density laser beam is used to fuse the coating material 200 and the surface of the metal base material 100 together, and the coating 300 combined with plastic is formed on the surface of the metal base material 100, and the laser cladding method has the advantages of small dilution, compact structure and good combination of the coating 300 and the metal base material 100.
When the plastic is a thermosetting plastic, the plastic is hot-pressed on the metal substrate 100; when the plastic is thermoplastic, the plastic is injection molded on the metal substrate 100.
In addition, the invention also provides a product produced by the metal and plastic combination method.
Compared with the prior art, the metal and plastic bonding method and the product thereof have the advantages that the bonding method is a dry process and does not need to adopt a medicament by spraying the coating material 200 in a plastic or molten state on the surface of the metal substrate 100 and then bonding the plastic on the metal substrate 100, so that the bonding method has no environmental problem of waste water discharge and is environment-friendly; the plastic and the metal can be tightly combined without designing a complex chew structure, which is different from the chew structure in the prior art; the product can be applied to electronic product areas needing radio frequency emission, such as notebook computer backshells, various articles partially needing plastic as an insulating part, articles needing air tightness test, and the like. Therefore, the metal and plastic bonding method and the product thereof have small influence on the surface of the metal material, the coating 300 ensures strong bonding between the metal and the plastic, high-density bonding between the metal and the plastic is realized, the process stability is high, and the automatic production is easy.
Claims (10)
1. A method for combining metal and plastic is characterized by comprising the following steps:
(1) loading the coating material into a spray tool;
(2) heating the coating material to a plastic or molten state, and then spraying the coating material on the surface of the metal base material by a spraying tool to generate a coating on the surface of the metal base material;
(3) and molding the plastic on the metal substrate.
2. The method for bonding metal and plastic according to claim 1, wherein the coating material has a particle size of nano-scale or micro-scale, and comprises a cross-linking agent and metal powder, wherein the amount of the cross-linking agent is 5-20% of the coating material.
3. The method of claim 2, wherein the cross-linking agent is dicumyl peroxide, benzoyl peroxide, di-t-butyl peroxide, or dicumyl hydroperoxide.
4. The metal and plastic bonding method of claim 2, wherein the melting point of the metal powder is greater than 500 ℃.
5. The method of claim 4, wherein the metal powder is titanium carbide, aluminum or chromium.
6. The metal and plastic bonding method of claim 2 or 4, wherein the metal powder is irregular in shape.
7. The metal and plastic bonding method of claim 1, wherein the spray tool is a spray gun.
8. The metal and plastic bonding method according to claim 1, wherein the coating material is sprayed on the surface of the metal substrate in step (2) by plasma spray welding or laser cladding.
9. The method of claim 1, wherein when the plastic is a thermosetting plastic, the plastic is hot-pressed on the metal substrate; when the plastic is thermoplastic, the plastic is injection molded on the metal substrate.
10. A product produced by the metal-plastic bonding method of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811412897.3A CN111216305A (en) | 2018-11-23 | 2018-11-23 | Method for combining metal and plastic and product thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811412897.3A CN111216305A (en) | 2018-11-23 | 2018-11-23 | Method for combining metal and plastic and product thereof |
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| Publication Number | Publication Date |
|---|---|
| CN111216305A true CN111216305A (en) | 2020-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811412897.3A Pending CN111216305A (en) | 2018-11-23 | 2018-11-23 | Method for combining metal and plastic and product thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1346736A (en) * | 2001-05-01 | 2002-05-01 | 邱德豪 | Method for cladding copper or stainless stee joint in plastic material |
| CN104894509A (en) * | 2015-05-17 | 2015-09-09 | 深圳市信太通讯有限公司 | Plastic coating metal imitation process |
| CN105500823A (en) * | 2014-10-15 | 2016-04-20 | 深圳富泰宏精密工业有限公司 | Preparation method of complex of metal and resin |
| CN106042264A (en) * | 2012-12-28 | 2016-10-26 | 比亚迪股份有限公司 | Preparation method for stainless steel-resin compound body and stainless steel-resin compound body prepared through method |
| CN107042602A (en) * | 2016-02-05 | 2017-08-15 | 汉达精密电子(昆山)有限公司 | Inserts associated methods and products thereof |
| CN107263939A (en) * | 2016-04-08 | 2017-10-20 | 优尔材料工业（深圳）有限公司 | complex and preparation method thereof |
-
2018
- 2018-11-23 CN CN201811412897.3A patent/CN111216305A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1346736A (en) * | 2001-05-01 | 2002-05-01 | 邱德豪 | Method for cladding copper or stainless stee joint in plastic material |
| CN106042264A (en) * | 2012-12-28 | 2016-10-26 | 比亚迪股份有限公司 | Preparation method for stainless steel-resin compound body and stainless steel-resin compound body prepared through method |
| CN105500823A (en) * | 2014-10-15 | 2016-04-20 | 深圳富泰宏精密工业有限公司 | Preparation method of complex of metal and resin |
| CN104894509A (en) * | 2015-05-17 | 2015-09-09 | 深圳市信太通讯有限公司 | Plastic coating metal imitation process |
| CN107042602A (en) * | 2016-02-05 | 2017-08-15 | 汉达精密电子(昆山)有限公司 | Inserts associated methods and products thereof |
| CN107263939A (en) * | 2016-04-08 | 2017-10-20 | 优尔材料工业（深圳）有限公司 | complex and preparation method thereof |
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Application publication date: 20200602 |