CN114347369A - Spraying-free IMT mobile phone rear cover production process - Google Patents
Spraying-free IMT mobile phone rear cover production process Download PDFInfo
- Publication number
- CN114347369A CN114347369A CN202111669789.6A CN202111669789A CN114347369A CN 114347369 A CN114347369 A CN 114347369A CN 202111669789 A CN202111669789 A CN 202111669789A CN 114347369 A CN114347369 A CN 114347369A
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- layer
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- embossing
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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
- B29C45/14008—Inserting articles into the mould
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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
- B29C45/14336—Coating a portion of the article, e.g. the edge of the article
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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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The production process of the spraying-free IMT mobile phone rear cover is processed by the following steps in sequence: coating an adhesive of a whole roll of PET membrane, coating UV (ultraviolet) embossing master batch, carrying out UV embossing texture, electroplating treatment, primary coating printing treatment and simultaneous film tearing and injection molding treatment; and finally obtaining the IML injection molding piece. The UV master batch independently developed by the invention can ensure that colloid can not be left on the embossed texture layer when the PET membrane is separated from the embossed texture layer, thereby ensuring that the embossed texture layer has the fingerprint-proof effect without adopting a spraying process in the whole operation, the hardness can meet the required requirement, a spraying jig is not required to be configured, the processing cost is greatly saved, the operation process of workers is also simplified, meanwhile, the whole operation is operated on a coil stock, the working efficiency is greatly improved, the sheet stock transfer of the workers is not required, the embossed texture layer can directly make full-gloss, full-matte and smooth-matte integrated visual effects without the arrangement of the spraying process, and the processing range is diversified.
Description
Technical Field
The invention relates to a production process of a mobile phone rear cover, in particular to a production process of a spraying-free IMT mobile phone rear cover.
Background
The shell of the existing electronic product mostly adopts an in-mold insert injection molding process (namely, IMT process), and has the advantages that the produced plastic piece has beautiful appearance and can have appearance effects of various colors, various patterns and the like. The technological process includes printing one release layer on one side of the film, UV embossing and transfer printing on the release layer, electroplating and primer printing to form film with pattern, setting the film with pattern into metal mold, injecting resin for forming into the metal mold to combine with the film to form one integral, demolding and tearing off the PET film with the release layer. According to the mode of in-mold injection molding, the release layer can be attached to the UV embossing pattern layer when the PET membrane is torn off, so that a layer of UV paint with anti-fingerprint, bright or matte effects is sprayed on the surface of the UV embossing transfer printing in a spraying mode after injection molding is finished, and thus, the spraying operation is performed while the production cost and the production process are increased, the manual workload is increased, and the spraying operation can be performed only by adopting sheet materials, so that the whole IMT process can only be performed by adopting sheet materials, the coil material operation cannot be performed, the production efficiency is low, and the whole mobile phone rear cover can only have the full-gloss effect or the full matte effect and cannot be combined in a matte mode.
Accordingly, the present inventors have made extensive studies to solve the above problems and have made the present invention.
Disclosure of Invention
The invention aims to provide a spraying-free production process for a rear cover of an IMT mobile phone, which aims to solve the problems that the conventional IMT mobile phone rear cover can be used only by adopting spraying operation, so that the production cost is high, the working procedures are multiple, the workload of workers is high, only sheet materials can be adopted for production, and the visual effect cannot be muted.
In order to achieve the purpose, the invention adopts the following technical scheme:
the production process of the spraying-free IMT mobile phone rear cover comprises the following steps:
the method comprises the following steps of firstly, drawing out a whole roll of PET membrane, and coating one surface of the drawn PET membrane with a layer of adhesive on the whole surface;
step two, coating a layer of UV (ultraviolet) embossing master batch on the adhesive layer in the step one to form a UV embossing master batch layer, wherein the embossing master batch consists of fluorine modified acrylic resin, 2-functional polyurethane acrylic resin, a monomer and a photoinitiator, the monomer consists of a monomer HDDA and a monomer NVP, the functionality of the fluorine modified acrylic resin is 4, the functionality of the monomer HDDA is 2, and the functionality of the monomer NVP is 1;
step three, coating a UV sub-adhesive layer on the UV embossing master adhesive layer in the step two, extruding concave-convex textures on the UV sub-adhesive layer through a printing roller, and curing through a UV lamp to obtain an embossing texture layer, wherein the UV sub-adhesive is UV paint mixed with anti-fingerprint paint;
step four, electroplating treatment is carried out on the embossed texture layer in the step three to form an electroplated layer;
printing a primer layer on the electroplated layer obtained in the step four to finish the film roll to be subjected to injection molding;
and step six, placing the membrane to be injection-molded in the step five into an injection mold, injection-molding an injection-molding layer on a primer layer of the membrane to be injection-molded, feeding a roll of injection-molded membrane into a cavity of the injection mold through a foil feeder during injection molding, stripping and injection-molding at the same time, finally combining the embossing texture layer and the injection-molding layer into a whole, and taking out an injection-molded part after injection molding is finished, wherein the injection-molded part is an IML mobile phone rear cover.
In the third step, the plate roller is provided with an outward convex grain processing, and the grain processing depth at one axial end of the plate roller is greater than the grain processing depth at the other axial end of the plate roller.
In the second step, the fluorine modified acrylic resin accounts for 50-55% of the total mass, the 2-functional polyurethane acrylic resin accounts for 10-15% of the total mass, the monomer HDDA accounts for 5-10% of the total mass, the monomer NVP accounts for 15-20% of the total mass, and the photoinitiator accounts for 3-5% of the total mass.
By adopting the technical scheme, the spraying-free IMT mobile phone rear cover production process has the advantages that the UV master batch independently developed by the invention can ensure that colloid is not left on the embossed texture layer when the PET membrane is separated from the embossed texture layer, so that the embossed texture layer can have the fingerprint-proof effect without adopting a spraying process in the whole operation, the hardness can meet the required requirement, a spraying jig is not required to be arranged, the processing cost is greatly saved, the operation process of workers is also simplified, meanwhile, the whole operation is operated on a coil stock, the working efficiency is greatly improved, the sheet stock transfer is not required to be carried out by the workers, the embossed texture layer can directly make full-gloss, full-matte and glossy-matte visual effects without the spraying process, and the processing range is diversified.
Detailed Description
In order to further explain the technical solution of the present invention, the following detailed description is given by way of specific examples.
The production process of the spraying-free IMT mobile phone rear cover is processed by the following steps:
the method comprises the following steps of firstly, pulling out a whole roll of PET membrane, and coating a layer of adhesive on the whole surface of one side of the pulled out PET membrane, wherein the adhesive is common oily adhesive;
step two, coating a layer of UV (ultraviolet) embossing master batch on the adhesive layer in the step one to form a UV embossing master batch layer, wherein the embossing master batch consists of fluorine modified acrylic resin, 2-functional polyurethane acrylic resin, a monomer and a photoinitiator, the monomer consists of a monomer HDDA (high density digital) and a monomer NVP (non-volatile organic compound), the monomer HDDA is also called a 1, 6-hexanediol diacrylate monomer, the monomer NVP is also called N-vinyl pyrrolidone, the functionality of the fluorine modified acrylic resin is 4, the functionality of the monomer HDDA is 2, and the functionality of the monomer NVP is 1; the gluing mode of the UV embossing master batch is a gluing mode of UV embossing operation, and the coating is carried out on the whole surface under the operation of rolling materials;
step three, coating a UV sub-adhesive layer on the UV embossing master adhesive layer in the step two, extruding concave-convex textures on the UV sub-adhesive layer through a printing roller, and curing the embossed textures through a UV lamp to obtain an embossing texture layer, wherein the UV sub-adhesive is UV paint mixed with anti-fingerprint paint, the operation in the step three is the existing UV embossing operation, the technology is known, and the difference is that the anti-fingerprint paint is added into the UV paint;
step four, electroplating treatment is carried out on the embossed texture layer in the step three to form an electroplated layer, the electroplating operation is also a known technology, and is different from the prior IMT process in a coil material operation mode and a non-sheet material operation mode;
step five, printing a primer layer on the electroplated layer obtained in the step four, and rolling after printing to finish the film roll to be subjected to injection molding;
and step six, placing the membrane to be injection-molded in the step five into an injection mold, injection-molding an injection-molding layer on a primer layer of the membrane to be injection-molded, feeding a roll of injection-molded membrane into a cavity of the injection mold through a foil feeder during injection molding, stripping and injection-molding, finally combining the embossing texture layer and the injection-molding layer into a whole, and taking out an injection-molded part after injection molding is finished, wherein the injection-molded part is an IML mobile phone rear cover, and the mode of stripping while injection molding is a known technology.
The spraying-free IMT mobile phone rear cover production process of the invention utilizes the fluorinion structure in the UV master glue formula to ensure that the UV master glue has a release effect, the UV master glue and the UV sub-glue are UV paint which can be quickly separated during separation, no colloid is left on the surface of the UV sub-glue, 2-functional polyurethane acrylic resin is utilized to ensure that the UV master glue has better flexibility and stretchability, monomer NVP is utilized to enhance the adhesive force to PET, namely, the UV master glue which is independently developed by the invention ensures that no colloid is left on an embossing texture layer when a PET membrane is separated from the embossing texture layer, thereby ensuring that the embossing texture layer has the fingerprint-proof effect without adopting a spraying process in the whole operation, the hardness can meet the required requirement, no spraying jig is required to be configured, the processing cost is greatly saved, the operation process of workers is simplified, and simultaneously, the whole operation is operated on a coil stock, the working efficiency is greatly improved, the sheet stock transfer is not needed for workers, the embossing texture layer can directly make full gloss, full matte and full matte visual effects without a spraying process, and the processing range is diversified.
In the third step, in the UV embossing operation, the plate roller made of the metal material for UV embossing has an outward convex texture, and the depth of the convex texture at one axial end of the plate roller is greater than that at the other axial end of the plate roller, namely, in the horizontal plate roller, the protruding length of the convex texture at one end of the plate roller is greater than that at the other end of the plate roller, so that the injection-molded part is in a light and dumb integrated effect by using the plate roller.
In the second step, the fluorine modified acrylic resin accounts for 50-55% of the total mass, the 2-functional polyurethane acrylic resin accounts for 10-15% of the total mass, the monomer HDDA accounts for 5-10% of the total mass, the monomer NVP accounts for 15-20% of the total mass, and the photoinitiator accounts for 3-5% of the total mass, preferably the fluorine modified acrylic resin accounts for 54% of the total mass, the 2-functional polyurethane acrylic resin accounts for 13% of the total mass, the monomer HDDA accounts for 10% of the total mass, the monomer NVP accounts for 18% of the total mass, and the photoinitiator accounts for 5% of the total mass.
The above-mentioned embodiments do not limit the production method of the present invention, and any suitable changes or modifications thereof by those skilled in the art should be considered as not departing from the scope of the present invention.
Claims (3)
1. The production process of the spraying-free IMT mobile phone rear cover is characterized by comprising the following steps of:
the method comprises the following steps of firstly, drawing out a whole roll of PET membrane, and coating one surface of the drawn PET membrane with a layer of adhesive on the whole surface;
step two, coating a layer of UV (ultraviolet) embossing master batch on the adhesive layer in the step one to form a UV embossing master batch layer, wherein the embossing master batch consists of fluorine modified acrylic resin, 2-functional polyurethane acrylic resin, a monomer and a photoinitiator, the monomer consists of a monomer HDDA and a monomer NVP, the functionality of the fluorine modified acrylic resin is 4, the functionality of the monomer HDDA is 2, and the functionality of the monomer NVP is 1;
step three, coating a UV sub-adhesive layer on the UV embossing master adhesive layer in the step two, extruding concave-convex textures on the UV sub-adhesive layer through a printing roller, and curing through a UV lamp to obtain an embossing texture layer, wherein the UV sub-adhesive is UV paint mixed with anti-fingerprint paint;
step four, electroplating treatment is carried out on the embossed texture layer in the step three to form an electroplated layer;
printing a primer layer on the electroplated layer obtained in the step four to finish the film roll to be subjected to injection molding;
and step six, placing the membrane to be injection-molded in the step five into an injection mold, injection-molding an injection-molding layer on a primer layer of the membrane to be injection-molded, feeding a roll of injection-molded membrane into a cavity of the injection mold through a foil feeder during injection molding, stripping and injection-molding at the same time, finally combining the embossing texture layer and the injection-molding layer into a whole, and taking out an injection-molded part after injection molding is finished, wherein the injection-molded part is an IML mobile phone rear cover.
2. The production process of the spraying-free IMT mobile phone rear cover according to claim 1, characterized in that: in the third step, the plate roller is provided with an outward convex grain processing, and the grain processing depth at one axial end of the plate roller is greater than the grain processing depth at the other axial end of the plate roller.
3. The production process of the spraying-free IMT mobile phone rear cover according to claim 1, characterized in that: in the second step, the fluorine modified acrylic resin accounts for 50-55% of the total mass, the 2-functional polyurethane acrylic resin accounts for 10-15% of the total mass, the monomer HDDA accounts for 5-10% of the total mass, the monomer NVP accounts for 15-20% of the total mass, and the photoinitiator accounts for 3-5% of the total mass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111669789.6A CN114347369A (en) | 2021-12-31 | 2021-12-31 | Spraying-free IMT mobile phone rear cover production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111669789.6A CN114347369A (en) | 2021-12-31 | 2021-12-31 | Spraying-free IMT mobile phone rear cover production process |
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| Publication Number | Publication Date |
|---|---|
| CN114347369A true CN114347369A (en) | 2022-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111669789.6A Pending CN114347369A (en) | 2021-12-31 | 2021-12-31 | Spraying-free IMT mobile phone rear cover production process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115923387A (en) * | 2022-12-03 | 2023-04-07 | 石狮市通达新材料有限公司 | Surface treatment process of carbon fiber plate |
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| CN108676189A (en) * | 2018-06-08 | 2018-10-19 | 东南大学 | A kind of optics shows the preparation method for curing fluorine silicon release film with ultraviolet light |
| CN212219544U (en) * | 2020-03-09 | 2020-12-25 | 苏州新吉海包装有限公司 | Novel screen protection film |
| CN113199836A (en) * | 2021-04-29 | 2021-08-03 | 曹祖铭 | Manufacturing method of electronic product shell |
-
2021
- 2021-12-31 CN CN202111669789.6A patent/CN114347369A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108676189A (en) * | 2018-06-08 | 2018-10-19 | 东南大学 | A kind of optics shows the preparation method for curing fluorine silicon release film with ultraviolet light |
| CN212219544U (en) * | 2020-03-09 | 2020-12-25 | 苏州新吉海包装有限公司 | Novel screen protection film |
| CN113199836A (en) * | 2021-04-29 | 2021-08-03 | 曹祖铭 | Manufacturing method of electronic product shell |
Non-Patent Citations (1)
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| 魏忠诚: "《光纤材料制备技术》", 北京邮电大学出版社, pages: 255 - 256 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115923387A (en) * | 2022-12-03 | 2023-04-07 | 石狮市通达新材料有限公司 | Surface treatment process of carbon fiber plate |
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