CN114683466A - Manufacturing process of colored plastic mobile phone rear cover - Google Patents
Manufacturing process of colored plastic mobile phone rear cover Download PDFInfo
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- CN114683466A CN114683466A CN202011616839.XA CN202011616839A CN114683466A CN 114683466 A CN114683466 A CN 114683466A CN 202011616839 A CN202011616839 A CN 202011616839A CN 114683466 A CN114683466 A CN 114683466A
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- 239000011248 coating agent Substances 0.000 claims abstract description 35
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- 229920006255 plastic film Polymers 0.000 claims abstract description 26
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- 238000001746 injection moulding Methods 0.000 claims description 42
- 239000000463 material Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 18
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- 239000012778 molding material Substances 0.000 claims description 11
- 238000002360 preparation method Methods 0.000 claims description 9
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- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 4
- 239000004417 polycarbonate Substances 0.000 claims description 4
- 229920000515 polycarbonate Polymers 0.000 claims description 4
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
- B29C45/0055—Shaping
-
- 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
- B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
- B29C45/0055—Shaping
- B29C2045/0058—Shaping removing material
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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
- B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
- B29C2045/0079—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping applying a coating or covering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3431—Telephones, Earphones
- B29L2031/3437—Cellular phones
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Telephone Set Structure (AREA)
Abstract
The invention discloses a manufacturing process of a colored plastic mobile phone rear cover, compared with the prior art, the produced colored plastic mobile phone rear cover, a hole site (7) for installing a camera is arranged on the colored plastic mobile phone rear cover (6), reinforcing ribs (8) which are fixedly connected are arranged at four corners and four edges of the colored plastic mobile phone rear cover (6), the reinforcing rib (8) and the colored plastic mobile phone rear cover (6) are in seamless fixed connection or are integrally formed, the colored plastic mobile phone rear cover (6) sequentially comprises a functional coating (3), an outer shell layer (1), a glue layer (9), a plastic film layer (10), a texture layer (2), a reflecting layer (4) and a shading layer (5), according to practical requirements, the values of RaxAb of the colored plastic mobile phone rear cover (6) comprise the values of RaxAb and RaxAb of the shell layer (1) and the value of RaxAb of the reflecting layer (4). The manufacturing process solves a series of problems of the colored plastic mobile phone rear cover manufactured by the manufacturing process of the mobile phone shell rear cover.
Description
Technical Field
The invention relates to the field of colored plastic mobile phone rear cover manufacturing, in particular to a colored plastic mobile phone rear cover manufacturing process.
Background
In the process of manufacturing the colored plastic mobile phone rear cover, a color difference formula of a used color difference meter is commonly used in industry: CIE L a b color space, L a, b are colorimetric values representing colors of objects, i.e. color space coordinates of the colors, and any color has a unique coordinate value; wherein L represents brightness (black and white), a represents red and green, and b represents yellow and blue; is a modern color difference assessment according to the standard color difference formula recommended by the International Commission on illumination (CIE) and is calculated by measuring with instruments and computers, and can be represented by precise numbers.
The color L, a and b of the rear cover of the colored plastic mobile phone is generally realized through a coating layer of a decorative film. When the color of the colored plastic mobile phone rear cover is darker, the coating layer is generally more complex, the more the required layers are, and the thicker the coating layer is. This brings about the following problems: (1) the more the number of the color layers of the coating layer is, the more the chromatic aberration of the coating is dispersed, which results in lower yield. (2) Because the coating layer needs to use a material with a high refractive index, but the thickness of the coating layer is generally only 5-100nm, and a slight change of the thickness of the coating layer can cause a large chromatic aberration, because the more coating layers, the poorer color gradation displayed by the coating layer is caused. (3) When the decorative film is attached to the inner surface of the 3D plastic shell, the more the number of layers is required, the thicker the coating layer is, and the more easily the coating layer is broken in a region with larger stress and strain, which results in poor appearance. (4) Moreover, the edge of the rear cover of the colored plastic mobile phone is not protected, so that the colored plastic mobile phone is easy to lose in the installation process.
Disclosure of Invention
The invention provides a manufacturing process of a colored plastic mobile phone rear cover, which solves a series of problems in the manufacturing process of the colored plastic mobile phone rear cover.
In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides a lid preparation technology behind coloured plastics cell-phone, lid behind the coloured plastics cell-phone after lid preparation technology preparation includes functional coating, outer shell, glue layer, plastics rete, texture layer, reflection stratum and light shield layer from outside to inside in proper order, the texture layer sets up one side of outer shell on the surface or on both sides surface, the texture layer with outer shell integrated into one piece, functional coating is the sclerosis coating, and lid behind the coloured plastics cell-phone is lid behind the coloured plastics cell-phone of integrated into one piece cover behind the coloured plastics cell-phone and be equipped with the hole site that is used for installing the camera four corners and the four sides of lid behind the coloured plastics cell-phone are equipped with fixed connection's reinforcement muscle, seamless fixed connection or integrated into one piece are covered behind reinforcement muscle and the coloured plastics cell-phone, lid preparation technology behind the coloured plastics cell-phone is as follows:
the method comprises the following steps: injection molding, namely forming the required plastic shell through an injection molding process according to different actual requirements;
step two: functionalization treatment, namely performing functionalization treatment on the plastic shell subjected to injection molding in the step one to form a functionalized coating;
step three: machining the numerical control machine tool, namely machining the appearance of the numerical control machine tool on the plastic shell subjected to the functionalized treatment in the step two according to different actual requirements;
step four: independently preparing a decorative film, using a plastic film as a base material, preparing a texture layer on the plastic film through a related process, and then forming a reflecting layer on the texture layer through a film coating process; according to different actual requirements, a shading material with shading effect is completely covered on the reflecting layer by using related processes to form a shading layer, and the decorative film is formed by preparing a texture layer, the reflecting layer and the shading layer on the plastic film;
step five: bonding, namely cutting the decorative film formed in the fourth step according to different actual requirements, bonding the cut decorative film to the plastic shell processed by the numerical control machine tool in the third step, and arranging a glue layer for bonding on the plastic shell during bonding, or using a plastic membrane provided with the glue layer when independently preparing the decorative film in the fourth step;
step six: forming a colored plastic mobile phone rear cover with L a b value through steps one to five, and controlling a and b values of the colored plastic mobile phone rear cover by controlling the component proportion of injection molding materials according to different actual requirements during injection molding in step one, or controlling a and b values of the colored plastic mobile phone rear cover by controlling the color value of a texture layer according to different actual requirements during independent preparation of a decorative film in step four, or controlling a and b values of the colored plastic mobile phone rear cover by controlling the color value of a glue layer in step five; meanwhile, when the decorative film is prepared independently in the fourth step, the L value of the colored plastic mobile phone rear cover is controlled by controlling the color value of the reflecting layer; finally, the colored plastic mobile phone rear cover with the required L A B value is formed.
Preferably, in the sixth step, if the component ratio of the injection molding material is controlled according to different actual requirements during injection molding in the first step, and the values a and b of the colored plastic mobile phone rear cover are controlled, the injection molding material is one or a combination of two or three of polymethyl methacrylate, propenyl diglycol carbonate and polycarbonate.
Preferably, the step one injection molding process uses injection filling.
Preferably, the molding temperature in the injection molding process in the first step is 100-.
Preferably, the second step of functionalization treatment is hardening treatment, the formed functionalized coating is a hardened coating, the hardened coating is on the outer side surface of the plastic shell, and the thickness of the hardened coating is 2-40 um.
Preferably, in the step four of independently preparing the decorative film, the coating process is a magnetron sputtering, CVD or evaporation mode.
Preferably, in the step four of separately preparing the decorative film, the light shielding material is a colored material.
Preferably, in the step four of independently preparing the decorative film, the shading material is completely covered on the reflecting layer of the plastic shell, and when the shading layer is formed, the relevant process is silk-screen printing, spraying or transfer printing, or the shading material is directly pasted on the reflecting layer of the plastic shell after being cut.
Preferably, when the texture layer is prepared in the fourth step and the sixth step, the process for preparing the texture layer on the plastic film sheet is to add the nano color paste into the texture glue to adjust the value a, b of the required color, and then transfer the colored texture glue onto the plastic film sheet by using the texture mold to form the texture layer, i.e. the value a, b of the colored plastic mobile phone rear cover is controlled by controlling the color value of the texture layer.
Preferably, the functionalized coating (3) is a hardened coating, the thickness of the outer shell (1) is 0.1-5.0mm, and the thickness of the functionalized coating (3) is 2-40 um.
The invention has the following beneficial effects: (1) the color of the plastic shell is divided into two parts, namely the color L, the color a and the color b, the values of the color a and the color b of the plastic shell after injection molding are controlled by controlling the component proportion of injection molding materials according to different actual requirements during colored injection molding, and the value of the color L of the colored plastic mobile phone rear cover is controlled by controlling the color value of the reflecting layer, so that the required color L a b colored plastic mobile phone rear cover is finally formed. (2) The invention adopts magnetron sputtering, CVD or evaporation mode during film coating, and can avoid the risk of larger cracking of the coating due to deformation during the bonding. (3) The invention directly combines the texture layer and the injection molding process together, thereby improving the efficiency and the first pass rate of products. (4) The colored plastic mobile phone rear cover is additionally provided with the reinforcing ribs, so that compared with the traditional mobile phone design, no protective measures are provided, the colored plastic mobile phone rear cover can be protected from being damaged in the installation process, and meanwhile, the reinforcing ribs can be integrally formed with the colored plastic mobile phone rear cover, so that the flow is greatly saved in the manufacturing process.
Drawings
Fig. 1 is an explosion schematic diagram of a colored plastic mobile phone rear cover manufactured by the colored plastic mobile phone rear cover manufacturing process of the invention used on a mobile phone.
Fig. 2 is a cross-sectional view of the colored plastic mobile phone rear cover manufactured by the colored plastic mobile phone rear cover manufacturing process of the invention.
Fig. 3 is a first flow chart of the manufacturing process of the colored plastic mobile phone rear cover of the invention.
Fig. 4 is a second flow chart of the manufacturing process of the colored plastic mobile phone rear cover of the invention.
Names of the corresponding components or flow names represented by numerals or letters in the drawings: 1. an outer shell layer; 2. a texture layer; 3. a functionalized coating; 4. a reflective layer; 5. a light-shielding layer; 6. a colored plastic mobile phone rear cover; 7. hole site; 8. reinforcing ribs; 9. a glue layer; 10. a plastic film layer.
The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted; the same or similar reference numerals correspond to the same or similar parts; the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be described in further detail with reference to examples. The method comprises the following specific steps:
detailed description of the invention
As shown in fig. 1 and 2, hole sites 7 for mounting a camera are provided on the colored plastic mobile phone rear cover 6, reinforcing ribs 8 are fixedly connected to four corners and four sides of the colored plastic mobile phone rear cover 6, the reinforcing ribs 8 and the colored plastic mobile phone rear cover 6 are fixedly connected in a seamless manner or integrally formed, the reinforcing ribs 8 provided at the four corners of the colored plastic mobile phone rear cover 6 are rectangular, and the reinforcing ribs 8 provided at the four sides of the colored plastic mobile phone rear cover 6 are integrally shaped like a Chinese character 'jing'. The material of the reinforcing rib 8 is transparent plastic or glass. In this embodiment, the reinforcing ribs 8 are fixedly connected to the colored plastic mobile phone rear cover 6 in a seamless manner, the reinforcing ribs 8 at the four corners of the colored plastic mobile phone rear cover 6 in this embodiment are rectangular, and the reinforcing ribs 8 at the four sides of the colored plastic mobile phone rear cover 6 are integrally shaped like a Chinese character 'jing', as shown in fig. 1. Meanwhile, in this embodiment, the reinforcing rib 8 is made of transparent plastic.
Specifically, the colored plastic mobile phone rear cover 6 sequentially comprises a functionalized coating layer 3, an outer shell layer 1, a glue layer 9, a plastic film layer 10, a texture layer 2, a reflection layer 4 and a light shielding layer 5 from outside to inside, according to actual requirements, the values of L a b of the color of the colored plastic mobile phone rear cover 6 comprise the values of a and b of the color of the outer shell layer 1 or the values of a and b of the color of the texture layer 2 or the values of a and b of the color of the glue layer 9 and the value of L of the color of the reflection layer 4, the functionalized coating layer 3 is a hardened coating, the thickness of the outer shell layer 1 is 0.1-5.0mm, and the thickness of the functionalized coating layer 3 is 2 mm
And 40um, wherein according to actual requirements, the values of the color of the colored plastic mobile phone back cover 6 include the values of the color of the outer shell layer 1, the values of the color of the texture layer 2, the values of the color of the glue layer 9, and the values of the color of the reflection layer 4, the thickness of the outer shell layer 1 is 0.1mm, the thickness of the functionalized coating layer 3 is 2um, the values of the color of the colored plastic mobile phone back cover 6 include the values of the color of the outer shell layer 1, the value of the color of the texture layer is colorless, and the values of the color of the colored plastic mobile phone back cover 6 are set to be yellow as a whole.
Detailed description of the invention
The main differences between the second embodiment and the first embodiment are as follows:
(1) in this embodiment, the reinforcing rib 8 and the colored plastic mobile phone rear cover 6 are integrally formed.
(2) In the embodiment, the thickness of the outer shell layer 1 is 5mm, the thickness of the functionalized coating layer 3 is 40um, the L a b values of the color of the colored plastic mobile phone rear cover 6 comprise a value and b values of the color of the texture layer 2 and L values of the color of the reflection layer 4, at this time, the outer shell layer is colorless, and the L a b values of the color of the colored plastic mobile phone rear cover 6 are integrally set to be blue.
Detailed description of the invention
The main differences between the third embodiment and the first embodiment are as follows:
(1) in this embodiment, the reinforcing rib 8 and the rear cover 6 of the colored plastic mobile phone are integrally formed.
(2) In this embodiment, the thickness of the outer shell layer 1 is 2.5mm, the thickness of the functionalized coating layer 3 is 20um, the values of L a b of the color of the colored plastic mobile phone rear cover 6 include the values of a b of the color of the glue layer 9 and the values of L b of the color of the reflective layer 4, at this time, the outer shell layer and the texture layer are colorless, and the value of L a b of the color of the colored plastic mobile phone rear cover 6 is entirely set to red.
Detailed description of the invention
In the first, second and third concrete implementation modes, the manufacturing process of the colored plastic mobile phone rear cover comprises the following steps:
as shown in fig. 3, step one: and (3) injection molding, namely forming the required plastic shell by an injection molding process according to different actual requirements, simultaneously filling the plastic shell by using injection molding in the injection molding process, wherein the molding temperature is 100-350 ℃, the injection pressure is 10-190MPa, the pressure for pressure-maintaining molding is 10-98MPa, the time for pressure-maintaining molding is 5-180s, and the thickness of the plastic shell after injection molding is 0.1-5.0 mm. In the present embodiment, the molding temperature during the injection molding process is 100 ℃, the injection pressure is 10Mpa, the pressure for pressure-maintaining molding is 10Mpa, the pressure-maintaining molding time is 5s, and the thickness of the plastic shell after injection molding is 0.1 mm.
Step two: and (4) functionalization treatment, namely functionalizing the plastic shell subjected to injection molding in the first step to form a functionalized coating. The functionalization treatment is hardening treatment, the functionalization coating is formed to be a hardening coating, the hardening coating is arranged on the outer side surface of the plastic shell, and the thickness of the hardening coating is 2-40 mu m. The thickness of the hardened coating in this example was 2 um.
Step three: and D, machining the numerical control machine tool, namely machining the appearance of the numerical control machine tool on the plastic shell subjected to the functionalized treatment in the step two according to different actual requirements.
Step four: independently preparing a decorative film, using a plastic film as a base material, preparing a texture layer on the plastic film through a related process, and forming a reflecting layer on the texture layer through a film coating process; according to different actual requirements, the shading material with the shading function is completely covered on the reflecting layer by using related processes to form a shading layer, and the texture layer, the reflecting layer and the shading layer are prepared on the plastic film sheet to form the decorative film. Wherein the coating process is a magnetron sputtering, CVD or evaporation mode. The shading material is a colored material, the shading material is completely covered on the reflecting layer of the plastic shell, and when the shading layer is formed, the related process is silk-screen printing, spraying or transfer printing, or the shading material is directly pasted on the reflecting layer of the plastic shell after being cut. In the embodiment, the coating process is magnetron sputtering, the shading material is black ink, and the related process is spraying.
Step five: and (4) attaching, namely cutting the decorative film formed in the step four according to different actual requirements, and attaching the cut decorative film to the plastic shell processed by the numerical control machine tool in the step three. And during the bonding, a glue layer for bonding is arranged on the plastic shell, or when the decorative film is prepared independently in the fourth step, a plastic film provided with the glue layer is used. The plastic film provided with the glue layer is used in the embodiment, and the plastic film adopts PET.
Step six: forming a colored plastic mobile phone rear cover with a value of L a b through the first step to the fifth step, wherein the values of a and b of the colored plastic mobile phone rear cover are controlled by controlling the component proportion of injection molding materials according to different actual requirements during injection molding in the first step, or the values of a and b of the colored plastic mobile phone rear cover are controlled by controlling the color value of a texture layer according to different actual requirements during independent preparation of a decorative film in the fourth step, or the values of a and b of the colored plastic mobile phone rear cover are controlled by controlling the color value of a glue layer in the fifth step; meanwhile, when the decorative film is prepared independently in the fourth step, the L value of the colored plastic mobile phone rear cover is controlled by controlling the color value of the reflecting layer; finally, the colored plastic mobile phone rear cover with the required L A B value is formed. If the values of a and b of the colored plastic mobile phone rear cover are controlled by controlling the color value of the texture layer, the related process for preparing the texture layer on the plastic film sheet is to add the nano color paste into the texture glue to adjust the values of a and b of the required colors, and then transfer the colored texture glue onto the plastic film sheet by using the texture mold to form the texture layer, namely, the values of a and b of the colored plastic mobile phone rear cover are controlled by controlling the color value of the texture layer. As shown in fig. 1, in this embodiment, the component ratios of the injection molding material are controlled, and the values a and b of the colored plastic mobile phone rear cover are controlled, so that the injection molding material is one or a combination of two or three of polymethyl methacrylate, propylene diglycol carbonate and polycarbonate. The injection molding material in this example was a combination of polymethyl methacrylate, propylene diglycol carbonate and polycarbonate.
Detailed description of the invention
The fifth embodiment is basically the same as the fourth embodiment in terms of setting conditions, and the main difference is that: in the first step, the molding temperature is 350 ℃, the injection pressure is 190MPa, the pressure for pressure-maintaining molding is 98MPa, the time for pressure-maintaining molding is 180s, and the thickness of the plastic shell after injection molding is 5 mm. The thickness of the hardened coating in the second step is 40 um. In the fourth step, the film coating process is CVD, the shading material is black plastic film, and the black plastic film is directly adhered to the reflecting layer of the plastic shell. And step five, arranging a glue layer for bonding on the plastic shell. In the sixth step, through the first to fifth steps, the colored plastic mobile phone rear cover with the L x a b value is formed, when the injection molding is performed in the first step, the a x and b values of the colored plastic mobile phone rear cover are controlled by controlling the color value of the texture layer, and when the texture layer is prepared, the process for preparing the texture layer on the plastic film sheet is to add the nano color paste into the texture glue to adjust the a x and b values of the required color, and then transfer the colored texture glue onto the plastic film sheet by using the texture mold to form the texture layer, that is, the a x and b values of the colored plastic mobile phone rear cover are controlled by controlling the color value of the texture layer, as shown in fig. 4.
Detailed description of the invention
The setting conditions of the sixth specific embodiment are basically the same as those of the fifth specific embodiment, and the main difference is that: in the first step, the molding temperature in the injection molding process is 225 ℃, the injection pressure is 100Mpa, the pressure for pressure-maintaining molding is 54MPa, the time for pressure-maintaining molding is 92s, and the thickness of the plastic shell after injection molding is 2.5 mm. The thickness of the hardened coating in the second step is 20 um. And in the fourth step, the coating process is evaporation. And step six, forming the colored plastic mobile phone rear cover with the L a b value through the steps one to five, and controlling the a b value of the colored plastic mobile phone rear cover by controlling the color value of the adhesive glue layer when the colored plastic mobile phone rear cover is adhered in the step five.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A manufacturing process of a colored plastic mobile phone rear cover is characterized by comprising the following steps: the colored plastic mobile phone rear cover (6) after the colored plastic mobile phone rear cover manufacturing process is manufactured sequentially comprises a functional coating (3), an outer shell layer (1), a glue layer (9), a plastic film layer (10), a texture layer (2), a reflecting layer (4) and a light shielding layer (5) from outside to inside, wherein the texture layer (2) is arranged on one side surface or two side surfaces of the outer shell layer (1), the texture layer (2) and the outer shell layer (1) are integrally formed, the functional coating (3) is a hardened coating, the colored plastic mobile phone rear cover is an integrally formed colored plastic mobile phone rear cover (6), hole sites (7) for installing cameras are arranged on the colored plastic mobile phone rear cover (6), reinforcing ribs (8) are fixedly connected with four corners and four sides of the colored plastic mobile phone rear cover (6), and the colored plastic mobile phone rear cover (6) are seamlessly and fixedly connected or integrally formed, the manufacturing process of the colored plastic mobile phone rear cover comprises the following steps:
the method comprises the following steps: injection molding, namely forming the required plastic shell through an injection molding process according to different actual requirements;
step two: functionalization treatment, namely performing functionalization treatment on the plastic shell subjected to injection molding in the step one to form a functionalized coating;
step three: machining the numerical control machine tool, namely machining the appearance of the numerical control machine tool on the plastic shell subjected to the functionalized treatment in the step two according to different actual requirements;
step four: independently preparing a decorative film, using a plastic film as a base material, preparing a texture layer on the plastic film through a related process, and forming a reflecting layer on the texture layer through a film coating process; according to different actual requirements, a shading material with shading effect is completely covered on the reflecting layer by using related processes to form a shading layer, and the decorative film is formed by preparing a texture layer, the reflecting layer and the shading layer on the plastic film;
step five: bonding, namely cutting the decorative film formed in the fourth step according to different actual requirements, bonding the cut decorative film to the plastic shell processed by the numerical control machine tool in the third step, and arranging a glue layer for bonding on the plastic shell during bonding, or using a plastic membrane provided with the glue layer when independently preparing the decorative film in the fourth step;
step six: forming a colored plastic mobile phone rear cover with L a b value through steps one to five, and controlling a and b values of the colored plastic mobile phone rear cover by controlling the component proportion of injection molding materials according to different actual requirements during injection molding in step one, or controlling a and b values of the colored plastic mobile phone rear cover by controlling the color value of a texture layer according to different actual requirements during independent preparation of a decorative film in step four, or controlling a and b values of the colored plastic mobile phone rear cover by controlling the color value of a glue layer in step five; meanwhile, when the decorative film is prepared independently in the fourth step, the L value of the colored plastic mobile phone rear cover is controlled by controlling the color value of the reflecting layer; finally, the colored plastic mobile phone rear cover with the required L A B value is formed.
2. The manufacturing process of the colored plastic mobile phone rear cover according to claim 1, characterized in that: and step six, if the component proportion of the injection molding material is controlled according to different actual requirements during injection molding in the step one, and the values of a and b of the colored plastic mobile phone rear cover are controlled, the injection molding material is one or the combination of two or three of polymethyl methacrylate, propenyl diglycol carbonate and polycarbonate.
3. The manufacturing process of the colored plastic mobile phone rear cover according to claim 2, characterized in that: and injecting glue for filling in the injection molding process in the step one.
4. The manufacturing process of the colored plastic mobile phone rear cover according to claim 3, characterized in that: in the injection molding process in the first step, the molding temperature is 100-350 ℃, the injection pressure is 10-190MPa, the pressure for pressure maintaining molding is 10-98MPa, the pressure maintaining molding time is 5-180s, and the thickness of the plastic shell after injection molding is 0.1-5.0 mm.
5. The manufacturing process of the colored plastic mobile phone rear cover according to claim 1, characterized in that: the second step is that the functionalized treatment is hardened treatment, the formed functionalized coating is a hardened coating, the hardened coating is arranged on the outer side surface of the plastic shell, and the thickness of the hardened coating is 2-40 um.
6. The manufacturing process of the colored plastic mobile phone rear cover according to claim 1, characterized in that: in the step four, in the independent preparation of the decorative film, the coating process is a magnetron sputtering, CVD or evaporation mode.
7. The manufacturing process of the colored plastic mobile phone rear cover according to claim 6, characterized in that: in the step four, the decorative film is prepared independently, and the shading material is a colored material.
8. The manufacturing process of the colored plastic mobile phone rear cover according to claim 7, characterized in that: in the step four, in the independent preparation of the decorative film, the shading material is completely covered on the reflecting layer of the plastic shell, and when the shading layer is formed, the related process is silk-screen printing, spraying or transfer printing, or the shading material is directly pasted on the reflecting layer of the plastic shell after being cut.
9. The manufacturing process of the colored plastic mobile phone rear cover according to claim 1, characterized in that: when the texture layer is prepared in the fourth step and the sixth step, the related process for preparing the texture layer on the plastic film sheet is to add the nano color paste into the texture glue to adjust the value a, b of the required color, and then transfer the colored texture glue to the plastic film sheet by using the texture mold to form the texture layer, namely, the value a, b of the back cover of the colored plastic mobile phone is controlled by controlling the color value of the texture layer.
10. The manufacturing process of the colored plastic mobile phone rear cover according to claim 1, characterized in that: the functionalized coating (3) is a hardened coating, the thickness of the outer shell (1) is 0.1-5.0mm, and the thickness of the functionalized coating (3) is 2-40 um.
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| CN202011616839.XA CN114683466A (en) | 2020-12-30 | 2020-12-30 | Manufacturing process of colored plastic mobile phone rear cover |
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