Crystal-imitating PVD (physical vapor deposition) preparation process

Abstract

The invention relates to the technical field of automobile part processing, in particular to a crystal-imitating PVD (Physical Vapor Deposition) preparation process which comprises the following technical processes: selecting raw materials for manufacturing parts, and carrying out injection molding to obtain a semi-finished product; carrying out fine carving processing on the formed semi-finished product of the part; the reverse side of the part product is subjected to first PVD spraying; plating an aluminum film on the surface of the product through PVD sputtering plating; the reverse side of the part product is subjected to second PVD spraying; pVD spraying is conducted on the front face of the part product; quality inspection; and packaging and warehousing finished products. The automobile gear lever shifting button part produced through the technical process has the advantages of being high in transparency, bright in color and luster, full in gloss and clear in corner angle, has the crystal texture in appearance, has the good decoration effect, is resistant to abrasion and scraping and is long in service life.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts processing, in particular to a crystal PVD preparation process. Background Art

[0002] There are many kinds of auto parts. With the improvement of people's living standards, people's consumption of cars is increasing, and the market for auto parts is becoming larger and larger. In recent years, the manufacturing technology of auto parts has also been developing rapidly.

[0003] The car gear lever knob is located in a conspicuous position in the car cab, and is frequently rubbed by the driver's hands during use. Therefore, it needs to have a good texture in appearance to ensure its decorative effect on the interior, and needs to have good wear resistance and scratch resistance to ensure its service life. Summary of the invention

[0004] The invention provides a crystal-like PVD preparation process, which solves the technical problems in the prior art that a car gear lever knob needs to have a good texture in appearance to ensure its decorative effect on the interior, and needs to have good wear resistance and scratch resistance to ensure its service life.

[0005] In view of the above problems, the technical solution proposed by the present invention is:

[0006] A crystal PVD preparation process, characterized in that the preparation process includes the following technical processes:

[0007] S1: Select the raw materials for making parts and obtain semi-finished products through injection molding;

[0008] S2: Carve the semi-finished parts.

[0009] S3: Perform the first PVD spraying on the reverse side of the component product;

[0010] S4: Aluminum film is applied on the surface of the product by PVD sputtering;

[0011] S5: Perform a second PVD spraying on the reverse side of the component product;

[0012] S6: PVD spraying on the front of the component product;

[0013] S7: Quality inspection;

[0014] S8: Finished products are packaged and shipped out.

[0015] Furthermore, the specific steps of S1 are: selecting a PMMA / ABS composition formed by blending, extruding and granulating 70% acrylonitrile-styrene-butadiene copolymer (ABS) and 30% polymethyl methacrylate (PMMA) as the main raw material, the injection mold selects a multi-cavity mold that can mold multiple parts at one time, and the moisture on the surface of the raw material is dried before being put into the injection molding machine. The preferred process parameters during injection molding are: the temperature of the melt is 220-250°C, the mold temperature is 60-80°C, and the injection pressure is 70-120MPa. After the injection molding is completed, an automatic hot shearing machine is used to shear and separate the multiple semi-finished parts connected together.

[0016] Furthermore, the specific steps of S2 are: using CAM software to convert the drawings of finished parts into codes recognizable by CNC machine tools, placing semi-finished parts into CNC machine tools, and the CNC machine tools automatically perform cutting, milling and other precision carving operations according to the programming codes to form the required shape and features of the finished products, and grinding and polishing the surfaces of the parts to improve the apparent quality of the products.

[0017] Furthermore, the specific steps of S3 are: sticking tape on the sides and front of the product, placing the product after sticking tape in a jig so that the back of the product faces outward, and fixing the product by the cover on the jig, using a vacuum coating machine to spray the anti-bite treatment agent on the back of the product, using an oven to dry the treatment agent on the surface of the product, and then spraying acrylic primer on the back of the product, and after spraying, using an oven to perform hot air drying on the product surface.

[0018] Furthermore, the specific steps of S4 are: placing the product in a magnetron sputtering coating apparatus, evacuating the air inside the vacuum chamber so that the internal air pressure is maintained between 0.066 and 0.13 Pa, and after the vacuuming is completed, filling the vacuum chamber with argon gas and simultaneously applying an aluminum film to the reverse side of the product.

[0019] Furthermore, the specific steps of S5 are: fixing the product in a jig so that the back of the product faces outward, using a vacuum coating machine to spray acrylic resin on the back of the product, applying a middle paint film layer on the surface of the product, using an oven to perform hot air drying on the middle paint film layer, and then spraying acrylic resin on the back of the product, and applying a top paint film layer on the surface of the product.

[0020] Furthermore, the specific steps of S6 are: tear off the tape on the side and front of the product, and stick tape on the back of the product, fix the product in the fixture so that the front of the product faces outward, and use a vacuum coating machine to divide the UV paint into three layers of primer, mid-coat and topcoat and spray them on the front of the product. After each layer of UV paint is sprayed, the paint layer on the surface of the product needs to be dried with hot air in an oven.

[0021] Furthermore, the specific steps of S7 are: including first-piece inspection and process inspection, and the inspection items include: using an electronic scale to check the weight of the product; using pliers to perform bending tests on the thin parts and obvious welds of the product; comparing the surface diagram with the standard sample to check the structure and appearance of the product; using an X-ray fluorescence spectrometer to detect harmful substances in the product.

[0022] Furthermore, the specific steps of S8 are: use a blister box, put the product face up into the grid of the blister box, put one product in each grid, place every 8 groups of blister boxes alternately in the packaging bag, put a plastic bag partition between two packages, and tie them into a tic-tac-toe shape with ropes, put the two bundled packages together into an outer packaging carton and seal them with tape.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: in the production process, the raw materials for making parts are first selected, semi-finished products are obtained by injection molding, the formed semi-finished parts are finely carved, the back of the parts product is subjected to the first PVD spraying, an aluminum film is applied on the product surface by PVD sputtering, the back of the parts product is subjected to the second PVD spraying, the front of the parts product is subjected to PVD spraying, the first product quality inspection and the process product quality random inspection are carried out, and finally the finished products are packaged and shipped out. The automobile gear lever knob parts produced by the above technical process have the characteristics of high transparency, bright color, full luster, and clear edges and corners. They have the texture of crystal in appearance, have good decorative effect, and are wear-resistant and scratch-resistant and have a high service life. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] A crystal PVD preparation process, the preparation process includes the following technical processes:

[0027] S1: Select the raw materials for making parts and obtain semi-finished products through injection molding;

[0028] S2: Carve the semi-finished parts.

[0029] S3: Perform the first PVD spraying on the reverse side of the component product;

[0030] S4: Aluminum film is applied on the surface of the product by PVD sputtering;

[0031] S5: Perform a second PVD spraying on the reverse side of the component product;

[0032] S6: PVD spraying on the front of the component product;

[0033] S7: Finished product quality inspection;

[0034] S8: Finished products are packaged and shipped out.

[0035] Furthermore, the specific steps of S1 are: selecting a PMMA / ABS composition formed by blending, extruding and granulating 70% acrylonitrile-styrene-butadiene copolymer (ABS) and 30% polymethyl methacrylate (PMMA) as the main raw material, and the products produced using the raw materials have the characteristics of high gloss, high hardness, high scratch resistance, etc., which effectively ensures the aesthetics and durability of the parts and components. The injection mold uses a multi-cavity mold, and after the injection molding is completed, an automatic hot shearing machine is used to shear and separate the multiple semi-finished parts connected together. Multiple parts and components can be molded during one injection molding process, and the production efficiency is high. Before the raw material is put into the injection molding machine, the moisture on its surface is dried before injection molding to avoid defects such as bubbles and silver streaks on the injection molded parts. The preferred process parameters during injection molding are: the temperature of the melt is 220-250°C, the mold temperature is 60-80°C, and the injection pressure is 70-120MPa.

[0036] Furthermore, the specific steps of S2 are: using CAM software to convert the drawings of finished parts into codes recognizable by CNC machine tools, placing semi-finished parts into CNC machine tools, and the CNC machine tools automatically perform cutting, milling and other precision carving operations according to the programming codes. The edges and corners of the finished products are flat, straight and without gaps, making them close to the appearance of crystal, and the surfaces of the parts are ground and polished to ensure that the product surface is smooth and flat to improve the apparent quality of the product.

[0037] Furthermore, the specific steps of S3 are: sticking tape on the sides and front of the product, placing the product after sticking the tape in a jig so that the back of the product faces outward, and fixing the product with the cover on the jig, and the tape on the front and sides of the product can prevent the paint from being contaminated on the front or sides of the product during the painting process, ensuring that the paint can be evenly and completely attached to the back of the product, using a vacuum coating machine to spray the anti-bite primer on the back of the product, and using an oven to dry the treatment agent on the surface of the product, and then spraying acrylic primer on the back of the product to seal the tiny pores and defects on the surface of the product, and further improve the bonding strength between the paint layer and the surface of the product, and after spraying, use an oven to perform hot air drying on the product surface.

[0038] Furthermore, the specific steps of S4 are: placing the product in a magnetron sputtering coating apparatus, extracting the air inside the vacuum chamber to maintain the internal air pressure between 0.066 and 0.13 Pa, and after the vacuuming is completed, filling the vacuum chamber with argon gas and simultaneously applying an aluminum film to the reverse side of the product, which can form a uniform and high-quality aluminum-plated film in a relatively short time and improve the gloss texture of the product surface.

[0039] Furthermore, the specific steps of S5 are: fixing the product in a jig so that the back of the product faces outward, using a vacuum coating machine to spray acrylic resin on the back of the product, applying a middle paint film layer on the surface of the product to increase the thickness of the coating, improve the shielding effect of the coating, and fill the uneven parts of the base surface to make the product surface smoother, using an oven to perform hot air drying on the middle paint film layer, and then spraying acrylic resin on the back of the product, applying a top coat film layer on the surface of the product, which has a higher gloss, decorates and protects the surface of the product, and can improve the aesthetics and durability of the coating.

[0040] Furthermore, the specific steps of S6 are: tear off the tape on the side and front of the product, and stick tape on the back of the product, fix the product in the fixture so that the front of the product faces outward to prevent the back of the product from being contaminated by the paint, so that the paint can be evenly and comprehensively attached to the front of the product, and use a vacuum coating machine to divide the UV paint into three layers of primer, mid-coat and topcoat and spray them on the front of the product. After each layer of UV paint is sprayed, it is necessary to use an oven to perform hot air drying on the paint layer on the surface of the product. The front UV coating of the product has the characteristics of high transparency, rich and bright color, scratch resistance and wear resistance.

[0041] Furthermore, the specific steps of S7 are: including first-piece inspection and process inspection to ensure the stability of finished product quality during the production process. The inspection items include: using an electronic scale to check the weight of the product, and the weight error between the finished product and the standard part shall not exceed ±5%; using pliers to perform bending tests on the thin parts and obvious welds of the product, bending them evenly at 45 degrees on each side, and the product is qualified if there is no brittle fracture at the tested part; comparing the surface diagram and the standard sample to check the structure and appearance of the product; using an X-ray fluorescence spectrometer to detect harmful substances in the product.

[0042] Furthermore, the specific steps of S8 are: use a blister box, put the product face up into the grid of the blister box, put one product in each grid, place every 8 groups of blister boxes alternately in the packaging bag, put a plastic bag partition between two packages, and tie them into a tic-tac-toe shape with ropes, put the two bundled packages together into an outer packaging carton and seal them with tape.

[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A crystal PVD preparation process, characterized in that: The preparation process includes the following technical processes: S1: Select the raw materials for making parts and obtain semi-finished products through injection molding; S2: Carve the semi-finished parts. S3: Perform the first PVD spraying on the reverse side of the component product; S4: Aluminum film is applied on the surface of the product by PVD sputtering; S5: Perform a second PVD spraying on the reverse side of the component product; S6: PVD spraying on the front of the component product; S7: Quality inspection; S8: Finished products are packaged and shipped out.

2. The crystal PVD preparation process according to claim 1, characterized in that: The specific steps of S1 are: selecting a PMMA / ABS composition formed by co-blending, extruding and granulating 70% acrylonitrile-styrene-butadiene copolymer (ABS) and 30% polymethyl methacrylate (PMMA) as the main raw material; selecting a multi-cavity mold capable of molding multiple parts at one time for the injection mold; drying the surface moisture of the raw materials before feeding them into the injection molding machine; the preferred process parameters for injection molding are: the temperature of the melt is 220-250°C, the mold temperature is 60-80°C, the injection pressure is 70-120MPa, and after the injection molding is completed, an automatic hot shearing machine is used to shear and separate the multiple semi-finished parts connected together.

3. The crystal PVD preparation process according to claim 1, characterized in that: The specific steps of S2 are: use CAM software to convert the drawings of finished parts into codes recognizable by CNC machine tools, put the semi-finished parts into the CNC machine tools, and the CNC machine tools automatically perform cutting, milling and other precision carving operations according to the programming codes to form the required shape and features of the finished products, and grind and polish the surface of the parts to improve the apparent quality of the products.

4. The crystal PVD preparation process according to claim 1, characterized in that: The specific steps of S3 are: stick tape on the sides and front of the product, place the product after sticking tape in the jig so that the back of the product faces outward, and fix the product with the cover on the jig, use a vacuum coating machine to spray the anti-bite treatment agent on the back of the product, use an oven to dry the treatment agent on the surface of the product, and then spray acrylic primer on the back of the product. After spraying, use an oven to dry the product surface with hot air.

5. The crystal PVD preparation process according to claim 1, characterized in that: The specific steps of S4 are: placing the product in a magnetron sputtering coating apparatus, evacuating the air inside the vacuum chamber to keep the internal air pressure between 0.066 and 0.13 Pa, and after the vacuuming is completed, filling the vacuum chamber with argon gas and applying an aluminum film on the reverse side of the product.

6. The crystal PVD preparation process according to claim 1, characterized in that: The specific steps of S5 are: fix the product in a fixture so that the back of the product faces outward, use a vacuum coating machine to spray acrylic resin on the back of the product, apply a middle paint film layer on the surface of the product, use an oven to perform hot air drying on the middle paint film layer, then spray acrylic resin on the back of the product, and apply a top paint film layer on the surface of the product.

7. The crystal PVD preparation process according to claim 1, characterized in that: The specific steps of S6 are: tear off the tape on the sides and front of the product, and stick tape on the back of the product, fix the product in the fixture so that the front of the product faces outward, and use a vacuum coating machine to divide the UV paint into three layers of primer, mid-coat and topcoat and spray them on the front of the product. After each layer of UV paint is sprayed, an oven is needed to perform hot air drying on the paint layer on the surface of the product.

8. The crystal PVD preparation process according to claim 1, characterized in that: The specific steps of S7 are: including first-piece inspection and process inspection, and the inspection items include: using electronic scales to check the weight of each product; using pliers to perform bending tests on the thin parts and obvious welds of the product; comparing the surface diagram with the standard sample to check the structure and appearance of the product; using X-ray fluorescence spectrometer to detect harmful substances in the product.

9. The crystal PVD preparation process according to claim 1, characterized in that: The specific steps of S8 are: use a blister box, put the product face up into the grid of the blister box, put one product in each grid, place every 8 groups of blister boxes alternately in the packaging bag, put a plastic bag partition between two packages, and tie them into a tic-tac-toe shape with ropes, put the two bundles together into the outer packaging carton and seal them with tape.