CN110588196B - UV printing process for plastic shell - Google Patents

UV printing process for plastic shell Download PDF

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Publication number
CN110588196B
CN110588196B CN201811498945.5A CN201811498945A CN110588196B CN 110588196 B CN110588196 B CN 110588196B CN 201811498945 A CN201811498945 A CN 201811498945A CN 110588196 B CN110588196 B CN 110588196B
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Prior art keywords
printing
board
pmma
composite
semi
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CN110588196A (en
Inventor
曹祖铭
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Shenzhen yimingyue Technology Co.,Ltd.
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曹祖铭
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Classifications

    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/002—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor characterised by the choice of material
    • 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
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/02—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B32B27/322—Layered products comprising a layer of synthetic resin comprising polyolefins comprising halogenated polyolefins, e.g. PTFE
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B32B27/365—Layered products comprising a layer of synthetic resin comprising polyesters comprising polycarbonates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/14—Printing or colouring
    • B32B38/145—Printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/06—Lithographic printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/10—Intaglio printing ; Gravure printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/26—Printing on other surfaces than ordinary paper
    • B41M1/30—Printing on other surfaces than ordinary paper on organic plastics, horn or similar materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/008—Sequential or multiple printing, e.g. on previously printed background; Mirror printing; Recto-verso printing; using a combination of different printing techniques; Printing of patterns visible in reflection and by transparency; by superposing printed artifacts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B2038/0052—Other operations not otherwise provided for
    • B32B2038/0076—Curing, vulcanising, cross-linking

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Printing Methods (AREA)

Abstract

The invention discloses a plastic shell UV printing process, which comprises the following steps: s1, selecting a PC plate and a PMMA + PC composite plate; s2, printing pictures and texts on one surface of the PC board in a UV printing mode; s3, coating a protective film on the printed surface of the PC board in the step S2; s4, carrying out UV transfer printing, electroplating and silk screen printing on the side, not coated with the film, of the PC board obtained in the step S3; s5, tearing off the protective film of the PC board in the step S4; s6, attaching and pasting the PC surface of the PMMA + PC composite board and the UV printing surface of the PC board obtained in the step S5 in a UV glue transfer printing mode, and obtaining the composite board after UV curing; s7, carrying out high-pressure or hot-press molding on the composite board obtained in the step S6; s8, hardening the semi-finished PMMA surface of the step S7; s9, carrying out CNC contour cutting on the semi-finished product obtained in the step S8 to obtain a finished product; s10, hardening the semi-finished PMMA surface of the step S9.

Description

UV printing process for plastic shell
Technical Field
The invention relates to the technical field of printing processes, in particular to a plastic shell UV printing process.
Background
In the current 5G era, because of signal problems, the back cover of the mobile phone can not use metal materials with strong signal shielding performance. And non-metallic ceramic/glass/plastic materials are widely used. The glass and plastic materials are usually transparent materials, the inner layer is decorated with surface effects, and various colors required by the surface appearance are finished in the modes of silk screen printing, spraying, dyeing, electroplating and the like. A mobile phone back cover made of an existing composite board is formed by sequentially manufacturing a first color layer on a PC surface of a PMMA + PC composite board; the second layer is used as a UV transfer printing layer to achieve a certain optical effect; electroplating the third layer; the fourth layer is used as a screen printing anti-light-transmission layer.
In the prior art, the appearance color of the product is changed mainly by the color layer of the first layer. The silk-screen printing mode has low precision, is not easy to control the thickness and the uniformity of the printing ink, has large color difference of mass production, and can only make full-face colors or local characters. Fine gradations or patterns cannot be realized; the dyeing/spraying method can only make a single color and needs to fix the direction.
Disclosure of Invention
The technical problem to be solved by the invention is to provide
The technical scheme adopted by the invention for solving the technical problems is as follows:
a plastic shell UV printing process comprises the following steps:
s1, selecting a PC plate and a PMMA + PC composite plate;
s2, printing pictures and texts on one surface of the PC board in a UV printing mode, and if necessary, firstly, using screen printing grafting ink to enhance the adhesive force;
step S3, covering a protective film on the printed surface of the PC board in the step S2;
step S4, carrying out UV transfer printing, electroplating and silk screen printing on the side, not coated with the film, of the PC board obtained in the step S3;
step S5, tearing off the protective film of the PC board in the step S4;
s6, attaching and pasting the PC surface of the PMMA + PC composite board and the UV printing surface of the PC board obtained in the S5 in a UV glue transfer printing mode, and obtaining a composite board after UV curing;
step S7, carrying out high-pressure or hot-press molding on the composite board obtained in the step S6;
step S8, hardening the semi-finished PMMA surface of the step S7;
step S9, carrying out CNC shape cutting on the semi-finished product obtained in the step S8 to obtain a finished product;
step S10, hardening the semi-finished PMMA surface of step S9.
According to the method, the granular feeling caused by the amplification of printing dots by the UV transfer texture and electroplating is reduced through different reflectivity and refractive index of the PC board and the composite UV transfer glue, and compared with the effect of directly printing on a PMMA + PC composite board, the fineness of a product is greatly improved. In addition, compared with the prior art, the existing process is completed on the PC plate, and the cost of the PC plate is far lower than that of the PMMA + PC composite plate. Compared with the prior art, the plastic shell with the same thickness is manufactured, and the cost caused by the manufacturing process loss is greatly saved.
A plastic shell UV printing process comprises the following steps:
r1, selecting a PC plate and a PMMA + PC composite plate;
step R2, printing partial pictures and texts on one surface of the PC board in a UV or silk-screen printing mode;
step R3, covering a protective film on the printed surface of the PC board material in the step R2;
step R4, non-overlapping image-text printing or full-surface printing is carried out on the side, which is not coated with the film, of the PC board in the step R3 in a UV or silk-screen printing mode;
step R5, carrying out UV transfer printing, electroplating and silk-screen printing on the side, which is not coated with the film, of the PC board obtained in the step R4;
step R6, tearing off the protective film of the PC board in the step R5;
step R7, attaching and pasting the PC surface of the PMMA + PC composite board and the UV printing surface of the PC board in the step R6 in a UV glue transfer printing mode, and obtaining the composite board after UV curing;
step R8, carrying out high-pressure or hot-press molding on the composite board obtained in the step R7;
step R9, hardening the semi-finished PMMA surface of the step R8;
step R10, carrying out CNC shape cutting on the semi-finished product obtained in the step R9 to obtain a finished product;
and R11, hardening the semi-finished PMMA surface of the R10.
The method not only improves the fineness of the product pattern, but also increases the three-dimensional fall sense of the product appearance pattern. So that the product has more effects to be applied. Compared with the prior art, the composite superposition method can superpose more effects on different materials. Is not limited by the process which can be made on a pure material.
Preferably, the UV printing is lithographic or gravure printing. The offset printing or the gravure printing realizes accurate output and reduction due to the adoption of the metal plate, the pattern or/and the image. The ink layer with thinner mesh points is thinner, the ink does not volatilize solvent, and the mass production is more stable. And can realize the printing reduction of any pattern. And the yield of the flat plate printing/gravure printing equipment is higher than that of the silk screen printing equipment.
The invention can be applied to plastic shells of automobile decorations and household electrical appliances, and mainly aims at shells of electronic products such as mobile phones and the like. The appearance diversity and changeability of the plastic shell are improved, and the production efficiency is improved by adopting a flat-plate printing/gravure printing device with higher productivity; the printing effect is more variable, and the solid surface of the gradual change color and the complex pattern which can not be achieved by the original process can be finished; the cost of the PC board is lower than that of a PMMA + PC composite board, and the composite board is less due to process loss, so that the cost is reduced; the degree of UV transfer printing and electroplating amplification of printing screen points is reduced through refraction of different composite materials, and the product fineness is effectively improved; the visual effect of multilayer three-dimensional fall is realized by printing the two sides of the PC board, so that the printing effect of the product is more diversified; by adopting a multilayer composite process, more processes can be realized on different materials for effect superposition, so that the appearance of the product can realize multiple designs.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Detailed Description
The following detailed description of the embodiments of the present invention will be provided with reference to the drawings and examples, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented. It should be noted that, as long as there is no conflict, the embodiments and the features of the embodiments of the present invention may be combined with each other, and the technical solutions formed are within the scope of the present invention.
Example 1:
a plastic shell UV printing process comprises the following steps:
s1, selecting a PC plate and a PMMA + PC composite plate;
s2, printing pictures and texts on one surface of the PC board in a UV printing mode, and if necessary, firstly, using screen printing grafting ink to enhance the adhesive force;
step S3, covering a protective film on the printed surface of the PC board in the step S2;
step S4, carrying out UV transfer printing, electroplating and silk screen printing on the side, not coated with the film, of the PC board obtained in the step S3;
step S5, tearing off the protective film of the PC board in the step S4;
s6, attaching and pasting the PC surface of the PMMA + PC composite board and the UV printing surface of the PC board obtained in the S5 in a UV glue transfer printing mode, and obtaining a composite board after UV curing;
step S7, carrying out high-pressure or hot-press molding on the composite board obtained in the step S6;
step S8, hardening the semi-finished PMMA surface of the step S7;
step S9, carrying out CNC shape cutting on the semi-finished product obtained in the step S8 to obtain a finished product;
step S10, hardening the semi-finished PMMA surface of step S9.
The mode of laminating of PC panel and PMMA + PC composite board: placing the PMMA + PC composite board on a table board of a UV transfer machine, gluing the lower end of the PC surface of the PMMA + PC composite board by using a glue spreader, taking a PC board, placing the UV printing surface on the PC surface of the PMMA + PC composite board, rolling the UV printing surface to the other end from the gluing end by using a glue pressing wheel, covering the whole material area with glue, and carrying out photocuring irradiation on the whole product by using a UV lamp or an LED.
And step S2 and step S4 can also be reversed, UV transfer printing lines, electroplating and silk-screen bottom covering can be completed on one side of the PC board, and then the other side of the PC board is printed with needed pictures and texts in a UV printing mode.
Preferably, the UV printing is lithographic or gravure printing. The offset printing or the gravure printing realizes accurate output and reduction because of adopting a metal plate, a pattern or an image. The ink layer with thinner mesh points is thinner, the ink does not volatilize solvent, and the mass production is more stable. And can realize the printing reduction of any pattern. And the yield of the flat plate printing/gravure printing equipment is higher than that of the silk screen printing equipment.
According to the method, the granular feeling caused by the amplification of printing dots by the UV transfer texture and electroplating is reduced through different reflectivity and refractive index of the PC board and the composite UV transfer glue, and compared with the effect of directly printing on a PMMA + PC composite board, the fineness of a product is greatly improved. In addition, compared with the prior art, the existing process is completed on the PC plate, and the cost of the PC plate is far lower than that of the PMMA + PC composite plate. Compared with the prior art, the plastic shell with the same thickness is manufactured, and the cost caused by the manufacturing process loss is greatly saved.
Example 2:
a plastic shell UV printing process comprises the following steps:
r1, selecting a PC plate and a PMMA + PC composite plate;
step R2, printing partial pictures and texts on one surface of the PC board in a UV or silk-screen printing mode;
step R3, covering a protective film on the printed surface of the PC board material in the step R2;
step R4, non-overlapping image-text printing or full-surface printing is carried out on the side, which is not coated with the film, of the PC board in the step R3 in a UV or/silk-screen printing mode;
step R5, carrying out UV transfer printing, electroplating and silk-screen printing on the side, which is not coated with the film, of the PC board obtained in the step R4;
step R6, tearing off the protective film of the PC board in the step R5;
step R7, attaching and pasting the PC surface of the PMMA + PC composite board and the UV printing surface of the PC board in the step R6 in a UV glue transfer printing mode, and obtaining the composite board after UV curing;
step R8, carrying out high-pressure or hot-press molding on the composite board obtained in the step R7;
step R9, hardening the semi-finished PMMA surface of the step R8;
step R10, carrying out CNC shape cutting on the semi-finished product obtained in the step R9 to obtain a finished product;
and R10, hardening the semi-finished PMMA surface of the R10.
The mode of laminating of PC panel and PMMA + PC composite board: placing the PMMA + PC composite board on a table board of a UV transfer machine, gluing the lower end of the PC surface of the PMMA + PC composite board by using a glue spreader, taking a PC board, placing the UV printing surface on the PC surface of the PMMA + PC composite board, rolling the UV printing surface to the other end from the gluing end by using a glue pressing wheel, covering the whole material area with glue, and carrying out photocuring irradiation on the whole product by using a UV lamp or an LED.
Preferably, the UV printing is lithographic or gravure printing. The offset printing or the gravure printing realizes accurate output and reduction because of adopting a metal plate, a pattern or an image. The ink layer with thinner mesh points is thinner, the ink does not volatilize solvent, and the mass production is more stable. And can realize the printing reduction of any pattern. And the yield of the flat plate printing/gravure printing equipment is higher than that of the silk screen printing equipment.
The method not only improves the fineness of the product pattern, but also increases the three-dimensional fall sense of the product appearance pattern. So that the product has more effects to be applied. Compared with the prior art, the composite superposition method can superpose more effects on different materials. Is not limited by the process which can be made on a pure material.
The invention can be applied to plastic shells of automobile decorations and household electrical appliances, and mainly aims at shells of electronic products such as mobile phones and the like. The appearance diversity and changeability of the plastic shell are improved, and the production efficiency is improved by adopting a flat-plate printing/gravure printing device with higher productivity; the printing effect is more variable, and the solid surface of the gradual change color and the complex pattern which can not be achieved by the original process can be finished; the cost of the PC board is lower than that of a PMMA + PC composite board, and the composite board is less due to process loss, so that the cost is reduced; the degree of UV transfer printing and electroplating amplification of printing screen points is reduced through refraction of different composite materials, and the product fineness is effectively improved; the visual effect of multilayer three-dimensional fall is realized by printing the two sides of the PC board, so that the printing effect of the product is more diversified; by adopting a multilayer composite process, more processes can be realized on different materials for effect superposition, so that the appearance of the product can realize multiple designs.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (3)

1. A plastic shell UV printing process is characterized by comprising the following steps:
s1, selecting a PC plate and a PMMA + PC composite plate;
step S2, printing pictures and texts on one surface of the PC board in a UV printing mode;
step S3, covering a protective film on the printed surface of the PC board in the step S2;
step S4, carrying out UV transfer printing, electroplating and silk screen printing on the side, not coated with the film, of the PC board obtained in the step S3;
step S5, tearing off the protective film of the PC board in the step S4;
s6, attaching and pasting the PC surface of the PMMA + PC composite board and the UV printing surface of the PC board obtained in the S5 in a UV glue transfer printing mode, and obtaining a composite board after UV curing;
step S7, carrying out high-pressure or hot-press molding on the composite board obtained in the step S6;
step S8, hardening the semi-finished PMMA surface of the step S7;
step S9, carrying out CNC shape cutting on the semi-finished product obtained in the step S8 to obtain a finished product;
step S10, hardening the semi-finished PMMA surface of step S9.
2. A plastic shell UV printing process is characterized by comprising the following steps:
r1, selecting a PC plate and a PMMA + PC composite plate;
step R2, printing partial pictures and texts on one surface of the PC board in a UV or silk-screen printing mode;
step R3, covering a protective film on the printed surface of the PC board material in the step R2;
step R4, non-overlapping image-text printing or full-surface printing is carried out on the side, which is not coated with the film, of the PC board in the step R3 in a UV or silk-screen printing mode;
step R5, carrying out UV transfer printing, electroplating and silk-screen printing on the side, which is not coated with the film, of the PC board obtained in the step R4;
step R6, tearing off the protective film of the PC board in the step R5;
step R7, attaching and pasting the PC surface of the PMMA + PC composite board and the UV printing surface of the PC board in the step R6 in a UV glue transfer printing mode, and obtaining the composite board after UV curing;
step R8, carrying out high-pressure or hot-press molding on the composite board obtained in the step R7;
step R9, hardening the semi-finished PMMA surface of the step R8;
step R10, carrying out CNC shape cutting on the semi-finished product obtained in the step R9 to obtain a finished product;
and R11, hardening the semi-finished PMMA surface of the R10.
3. The plastic housing UV printing process of claim 1, wherein the UV printing is lithographic or gravure printing.
CN201811498945.5A 2018-12-08 2018-12-08 UV printing process for plastic shell Active CN110588196B (en)

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CN110588196B true CN110588196B (en) 2021-04-09

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WO2021135006A1 (en) * 2019-12-30 2021-07-08 东莞市雅致印刷有限公司 Method for producing double-sided printing type map membrane and method for producing double-sided printing type terrestrial globe
CN111901460B (en) * 2020-07-31 2022-07-22 昆山三景科技股份有限公司 Matte integral mobile phone back cover and preparation method thereof
CN112223884A (en) * 2020-09-16 2021-01-15 深圳市亿铭粤科技有限公司 Method for manufacturing rear shell of electronic product
CN112959835A (en) * 2021-02-02 2021-06-15 东莞正广精密科技有限公司 Processing technology of mobile phone back shell
CN113102945A (en) * 2021-03-29 2021-07-13 深圳市锦瑞新材料股份有限公司 Large-arc-height forming processing technology for composite board of mobile phone shell
CN113561465B (en) * 2021-07-28 2023-04-28 东莞市聚龙高科电子技术有限公司 Plastic product surface 3D texture forming method and plastic product

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