CN111961242A - Colored plastic shell and preparation method thereof - Google Patents
Colored plastic shell and preparation method thereof Download PDFInfo
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- CN111961242A CN111961242A CN202010660790.1A CN202010660790A CN111961242A CN 111961242 A CN111961242 A CN 111961242A CN 202010660790 A CN202010660790 A CN 202010660790A CN 111961242 A CN111961242 A CN 111961242A
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- 239000004033 plastic Substances 0.000 title claims abstract description 85
- 229920003023 plastic Polymers 0.000 title claims abstract description 85
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 238000001746 injection moulding Methods 0.000 claims abstract description 42
- 239000011248 coating agent Substances 0.000 claims abstract description 36
- 238000000576 coating method Methods 0.000 claims abstract description 36
- 239000012778 molding material Substances 0.000 claims abstract description 8
- 230000008020 evaporation Effects 0.000 claims abstract description 5
- 238000001704 evaporation Methods 0.000 claims abstract description 5
- 238000001755 magnetron sputter deposition Methods 0.000 claims abstract description 5
- 239000010410 layer Substances 0.000 claims description 105
- 238000000034 method Methods 0.000 claims description 24
- 239000011247 coating layer Substances 0.000 claims description 18
- 238000000465 moulding Methods 0.000 claims description 18
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 10
- 238000003754 machining Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000007888 film coating Substances 0.000 claims description 5
- 238000009501 film coating Methods 0.000 claims description 5
- 238000007306 functionalization reaction Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 3
- 239000002991 molded plastic Substances 0.000 claims description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 3
- 239000004417 polycarbonate Substances 0.000 claims description 3
- 229920000515 polycarbonate Polymers 0.000 claims description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 3
- 125000004368 propenyl group Chemical group C(=CC)* 0.000 claims description 2
- 238000007650 screen-printing Methods 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 238000010023 transfer printing Methods 0.000 claims description 2
- 238000005336 cracking Methods 0.000 abstract description 2
- 239000003086 colorant Substances 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
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- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/046—Forming abrasion-resistant coatings; Forming surface-hardening coatings
-
- 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
- B29C45/16—Making multilayered or multicoloured articles
-
- 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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/1769—Handling of moulded articles or runners, e.g. sorting, stacking, grinding of runners
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/24—Vacuum evaporation
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
- C23C14/35—Sputtering by application of a magnetic field, e.g. magnetron sputtering
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2331/00—Characterised by the use of copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, or carbonic acid, or of a haloformic acid
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2333/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
- C08J2333/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C08J2333/10—Homopolymers or copolymers of methacrylic acid esters
- C08J2333/12—Homopolymers or copolymers of methyl methacrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2369/00—Characterised by the use of polycarbonates; Derivatives of polycarbonates
Abstract
The invention discloses a colored plastic shell and a preparation method thereof, wherein the color L, a, b of the plastic shell is divided, the values of a, 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 then the value of L of the colored plastic shell is controlled by controlling the color value of a reflecting layer, so that the required colored plastic shell with L a b is finally formed. Meanwhile, the invention adopts magnetron sputtering, CVD or evaporation mode during coating, which can avoid the risk of larger cracking of the coating due to deformation during bonding. In addition, the texture layer and the injection molding process are directly combined together, so that the efficiency and the first pass rate of the product are improved.
Description
Technical Field
The invention relates to the field of colored plastic shells, in particular to a colored plastic shell and a preparation method thereof.
Background
Electronic products such as cell-phone, computer, panel computer, VR are as the smart machine that often uses now, and its shell setting is especially important, and wherein, the colour preparation to the electronic product shell is especially important. In the process of manufacturing the color of the electronic product shell, a color difference formula of a used color difference meter is commonly used in the 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, b of the plastic shell of the electronic product is generally realized by a coating layer of the decorative film. When the color of the plastic shell of the electronic product is darker, the coating layer is generally more complex, the more layers are required, 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.
Disclosure of Invention
The invention provides a colored plastic shell and a preparation method thereof, which solve the problems of the prior art that the color of the plastic shell is realized by controlling the color of a film coating layer of a decorative film.
In order to solve the technical problems, the technical scheme of the invention is as follows: a preparation method of a colored plastic shell comprises the following steps:
the method comprises the following steps: performing colored injection molding, namely controlling the values of a and b of the injection molded plastic shell by controlling the component proportion of an injection molding material according to different actual requirements to form a colored plastic shell;
step two: preparing a texture layer, namely preparing the texture layer on the colored plastic shell by using a related process in the step one;
step three: functionalization treatment, namely functionalizing the colored plastic shell subjected to injection molding in the step two to form a functionalized coating;
step four: machining the numerical control machine tool, namely machining the appearance of the numerical control machine tool on the colored plastic shell subjected to the functionalized treatment in the step three according to different actual requirements;
step five: coating a film, preparing a reflecting layer, forming the reflecting layer on the colored plastic shell processed by the numerical control machine tool in the step four by coating the film on the texture layer of the colored plastic shell, and controlling the L value of the colored plastic shell by controlling the color value of the reflecting layer according to different actual requirements;
step six: preparing a shading layer, and completely covering the shading material on the reflecting layer of the colored plastic shell by using related processes according to different actual requirements on the basis of the fifth step to form the shading layer;
step seven: and finally forming the required colored plastic shell through the steps from one to six.
Preferably, the related process for preparing the texture layer in the second step is that injection molding is performed by using a textured metal mold core while performing colored injection molding in the first step, so as to form the colored plastic shell with the texture layer.
Preferably, when the metal mold core with the texture is used for injection molding, the texture layer can be formed on the inner surface or the outer surface of the colored plastic shell or both the inner surface and the outer surface according to actual requirements.
Preferably, the injection molding material used in the step one colored injection molding is one or a combination of two or three of polymethyl methacrylate, propylene-based diglycol carbonate and polycarbonate.
Preferably, the step one colored injection molding process uses injection filling.
Preferably, in the step one, 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 material after injection molding is 0.1-5.0 mm.
Preferably, the three-step functionalization treatment is hardening treatment, the formed functionalized coating is a hardened coating, the hardened coating is arranged on the outer side surface of the colored plastic shell, and the thickness of the hardened coating is 2-40 um.
Preferably, during the film coating in the fifth step, magnetron sputtering, CVD or evaporation plating is adopted for film coating.
Preferably, when the light shielding layer is prepared in the sixth step, the relevant process used is screen printing, spraying or transfer printing, and the light shielding material is completely covered on the reflective layer of the colored plastic shell, i.e. the light shielding layer is formed, or the light shielding material is cut and then directly pasted to form the light shielding layer.
The invention also provides a colored plastic shell, which sequentially comprises a shading layer, a reflecting layer, a shell layer, a texture layer and a functionalized coating, wherein the texture layer is arranged on one side surface or two side surfaces of the shell layer, the texture layer and the shell layer are integrally formed, the functionalized coating is a hardened coating, the thickness of the shell layer is 0.1-5.0mm, the thickness of the functionalized coating is 2-40um, and the values of La and b of the colored plastic shell comprise the values of a and b of the shell layer and the value of L of the reflecting layer according to actual requirements.
The invention has the following beneficial effects: (1) the invention separates the colors L, a and b of the plastic shell, firstly controls the values of a and b of the plastic shell after injection molding by controlling the component proportion of injection molding materials according to different actual requirements during colored injection molding, and then controls the value of L of the colored plastic shell by controlling the color value of the reflecting layer, thereby finally forming the required colored plastic shell. (2) The invention adopts magnetron sputtering, CVD or evaporation mode during film coating, which can avoid the risk of larger cracking of the coating due to deformation during 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.
Drawings
FIG. 1 is a first flow chart of the method for preparing the colored plastic housing of the present invention.
Fig. 2 is a perspective view of the colored plastic housing of the present invention.
Fig. 3 is a cross-sectional view of the textured layer of the colored plastic casing of the present invention on one side surface of the casing layer.
Fig. 4 is a cross-sectional view of the textured layer of the colored plastic casing of the present invention on one side surface of the casing layer.
Fig. 5 is a cross-sectional view of the textured layer of the colored plastic casing of the present invention on both side surfaces of the casing layer.
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 housing.
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 for those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and examples. The method comprises the following specific steps:
detailed description of the invention
The colored plastic housing 6 shown in fig. 3 sequentially comprises a light shielding layer 5, a reflecting layer 4, a housing layer 1, a texture layer 2 and a functionalized coating layer 3, wherein the texture layer 2 is arranged on one side surface of the housing layer 1, the texture layer 2 and the housing layer 1 are integrally formed, the functionalized coating layer 3 is a hardened coating, the thickness of the housing layer 1 is 0.1-5.0mm, the thickness of the functionalized coating layer 3 is 2-40um, and the L a b values of the colored plastic housing 6 comprise a b values of the housing layer 1 and L values of the reflecting layer 4 according to actual requirements. The texture layer 2 in this example is provided on the outer surface of the outer shell layer 1, i.e. in contact with the hardened coating 3; the thickness of the outer shell layer 1 is 0.1mm, the thickness of the functionalized coating layer 3 is 2um, and the overall L a b value of the colored plastic outer shell 6 is black.
Detailed description of the invention
The second embodiment is basically the same as the first embodiment in terms of setting conditions, and the main difference is that: as shown in fig. 4, the texture layer 2 in this example is provided on the inner surface of the outer shell layer 1, i.e., in contact with the reflective layer 4; the thickness of the outer shell layer 1 is 5mm, the thickness of the functionalized coating layer 3 is 40um, and the overall L a b value of the colored plastic outer shell 6 is white.
Detailed description of the invention
The second embodiment is basically the same as the first embodiment in terms of setting conditions, and the main difference is that: as shown in fig. 5, the texture layer 2 in this example is provided on both side surfaces of the outer shell layer 1, i.e., the texture layer 2 is in contact with the reflective layer 4 and the hardened coating 3, respectively; the thickness of the outer shell layer 1 is 2.5mm, the thickness of the functionalized coating layer 3 is 20um, and the overall L a b value of the colored plastic outer shell 6 is blue.
Detailed description of the invention
In the first, second and third specific embodiments, the preparation method of the colored plastic shell comprises the following steps:
the method comprises the following steps: performing colored injection molding, namely controlling the values of a and b of the injection molded plastic shell by controlling the component proportion of an injection molding material according to different actual requirements to form a colored plastic shell; wherein, the injection molding material adopted by the colored injection molding is one or the combination of two or three of polymethyl methacrylate, propenyl diglycol carbonate and polycarbonate. The colored injection molding process uses injection filling, meanwhile, the molding temperature in the colored injection molding process 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 material after injection molding is 0.1-5.0 mm. In this embodiment, the molding temperature in the colored injection molding process is 100 ℃, the injection pressure is 10Mpa, the pressure for pressure-maintaining molding is 10Mpa, and the pressure-maintaining molding time is 5 s.
Step two: preparing a texture layer, namely preparing the texture layer on the colored plastic shell by using a related process in the step one; the related process for preparing the texture layer is that injection molding is carried out by using the metal mold core with texture while the colored injection molding is carried out in the step one, so as to form the colored plastic shell with the texture layer, and when the injection molding is carried out by using the metal mold core with texture, the texture layer can be formed on the inner surface or the outer surface of the colored plastic shell or the inner surface and the outer surface exist simultaneously according to the actual requirement.
Step three: functionalization treatment, namely functionalizing the colored plastic shell subjected to injection molding in the step two to form a functionalized coating; the functionalization treatment in this example is a hardening treatment, and the formation of the functionalized coating is a hardened coating on the outer surface of the colored plastic shell, the hardened coating having a thickness of 2-40 um.
Step four: and (4) machining the numerical control machine tool, namely machining the appearance of the numerical control machine tool on the colored plastic shell subjected to the three-step functional treatment according to different actual requirements.
Step five: and coating a film, preparing a reflecting layer, namely forming the reflecting layer by coating the film on the texture layer of the colored plastic shell on the colored plastic shell processed by the numerical control machine tool in the step four, wherein the film is coated in a magnetron sputtering, CVD or evaporation mode, and the L value of the colored plastic shell is controlled by controlling the color value of the reflecting layer according to different actual requirements.
Step six: preparing a light shielding layer, and completely covering the light shielding material on the reflecting layer of the colored plastic shell by using a related process according to different actual requirements on the basis of the fifth step to form the light shielding layer. But may of course be implemented in other ways.
Step seven: and finally forming the required colored plastic shell through the steps from one to six.
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 process of colored injection molding, the molding temperature is 350 ℃, the injection pressure is 190MPa, the pressure for pressure-maintaining molding is 98MPa, and the time for pressure-maintaining molding is 180 s.
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: the molding temperature in the colored injection molding process is 225 ℃, the injection pressure is 100MPa, the pressure for pressure-maintaining molding is 54MPa, and the time for pressure-maintaining molding is 92 s.
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 preparation method of a colored plastic shell is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: performing colored injection molding, namely controlling the values of a and b of the injection molded plastic shell by controlling the component proportion of an injection molding material according to different actual requirements to form a colored plastic shell;
step two: preparing a texture layer, namely preparing the texture layer on the colored plastic shell by using a related process in the step one;
step three: functionalization treatment, namely functionalizing the colored plastic shell subjected to injection molding in the step two to form a functionalized coating;
step four: machining the numerical control machine tool, namely machining the appearance of the numerical control machine tool on the colored plastic shell subjected to the functionalized treatment in the step three according to different actual requirements;
step five: coating a film, preparing a reflecting layer, forming the reflecting layer on the colored plastic shell processed by the numerical control machine tool in the step four by coating the film on the texture layer of the colored plastic shell, and controlling the L value of the colored plastic shell by controlling the color value of the reflecting layer according to different actual requirements;
step six: preparing a shading layer, and completely covering the shading material on the reflecting layer of the colored plastic shell by using related processes according to different actual requirements on the basis of the fifth step to form the shading layer;
step seven: and finally forming the required colored plastic shell through the steps from one to six.
2. The method for preparing a colored plastic housing according to claim 1, wherein: and the related process for preparing the texture layer in the second step is that injection molding is carried out by using a metal mold core with texture while the colored injection molding in the first step is carried out, so as to form the colored plastic shell with the texture layer.
3. The method for preparing a colored plastic housing according to claim 2, wherein: when the metal mold core with texture is used for injection molding, the texture layer can be formed on the inner surface or the outer surface of the colored plastic shell or the inner surface and the outer surface exist simultaneously according to actual requirements.
4. A method for preparing a coloured plastic casing according to any of claims 1 to 3, characterised in that: the injection molding material adopted in the colored injection molding in the first step is one or a combination of two or three of polymethyl methacrylate, propenyl diglycol carbonate and polycarbonate.
5. The method for preparing a colored plastic housing according to claim 4, wherein: and in the first step, injection filling is used in the colored injection molding process.
6. The method for preparing a colored plastic housing according to claim 5, wherein: 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 material after injection molding is 0.1-5.0 mm.
7. The method for preparing a colored plastic housing according to claim 1, wherein: the three-step functionalized treatment is hardening treatment, the formed functionalized coating is a hardened coating, the hardened coating is arranged on the outer side surface of the colored plastic shell, and the thickness of the hardened coating is 2-40 um.
8. The method for preparing a colored plastic housing according to claim 1, wherein: and in the fifth step, during film coating, magnetron sputtering, CVD or evaporation coating is adopted.
9. The method for preparing a colored plastic housing according to claim 1, wherein: when the shading layer is prepared in the sixth step, the relevant process used is silk-screen printing, spraying or transfer printing, the shading material is completely covered on the reflecting layer of the colored plastic shell, namely, the shading layer is formed, or the shading material is directly pasted to form the shading layer after being cut.
10. A colored plastic shell is characterized in that: forming the colored plastic housing (6) by the colored plastic housing manufacturing method of claims 1-9, the colored plastic shell (6) sequentially comprises a shading layer (5), a reflecting layer (4), a shell layer (1), a texture layer (2) and a functional coating (3), 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 thickness of the outer shell layer (1) is 0.1-5.0mm, the thickness of the functional coating layer (3) is 2-40um, according to practical requirements, the L a b values of the colored plastic housing (6) include a, b values of the housing layer (1) and L values of the reflective layer (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010660790.1A CN111961242A (en) | 2020-07-10 | 2020-07-10 | Colored plastic shell and preparation method thereof |
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| CN114683467A (en) * | 2020-12-30 | 2022-07-01 | 伯恩高新科技（惠州）有限公司 | Manufacturing process of colored plastic mobile phone rear cover |
| CN114683470A (en) * | 2020-12-30 | 2022-07-01 | 伯恩高新科技（惠州）有限公司 | Manufacturing process of colored plastic mobile phone rear cover |
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Application publication date: 20201120 |