Preparation process of scratch-resistant colorful texture plastic part and highlight plastic part

Abstract

The invention relates to a preparation process of a scratch-resistant colorful texture plastic part, which comprises the following steps: processing nano laser textures in a mold cavity to obtain a highlight nano texture structure; high-temperature liquid glue is injected into a mold cavity, a highlight plastic part with colorful textures is obtained through injection molding and cooling, and the colorful textures of the highlight plastic part are complementary with the highlight nanometer texture structure in the mold cavity; and the highlight plastic part with the colorful textures is taken out of the mold cavity and then immediately placed in a cooling box to be continuously cooled for at least 4 hours at the temperature of-5 DEG C to 6 DEG C, and the highlight plastic part with the scratch-resistant colorful textures is obtained.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, and in particular to a preparation process of a scratch-resistant colorful textured plastic part and a high-gloss plastic part. Background Art

[0002] Due to the surge in people's aesthetic requirements in recent years, the requirements for decorative aesthetics of products in various fields such as 3C, digital, and packaging have also become increasingly higher. In particular, on the appearance of some products with high-gloss surfaces, people hope that the high-gloss surface can present a high-gloss effect of colorful textures under different angles of light, so as to improve the grade of various products. In fact, the colorful texture on the high-gloss surface of the product is generally a nano-level structure, which needs to be engraved on the high-gloss surface of the product with the help of laser. The nano-texture is not scratch-resistant during use. Summary of the invention

[0003] The present invention provides a preparation process of a scratch-resistant colorful texture plastic part and a high-gloss plastic part, so as to solve the technical problem that the nano-texture of the high-gloss plastic part with a high-gloss colorful texture is not scratch-resistant.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] In the first aspect of the present invention

[0006] The present invention provides a preparation process of a scratch-resistant colorful textured plastic part, comprising the following steps:

[0007] Processing nano-laser textures in the mold cavity to obtain high-gloss nano-texture structures;

[0008] Injecting high-temperature liquid glue into the mold cavity and cooling it after injection molding to obtain a high-gloss plastic part with a colorful texture, wherein the colorful texture of the high-gloss plastic part is complementary to the high-gloss nano-texture structure in the mold cavity;

[0009] The high-gloss plastic part with colorful texture is taken out from the mold cavity and immediately placed in a cooling box to maintain a temperature of -5°C to 6°C for at least 4 hours to obtain a high-gloss plastic part with scratch-resistant colorful texture.

[0010] In one of the embodiments, during injection molding, a high-temperature liquid soft glue is selected to be injected into the mold cavity; during cooling, the temperature of the cooling box is controlled between 1°C and 6°C.

[0011] In one of the embodiments, during injection molding, a high-temperature liquid hard glue is selected to be injected into the mold cavity; during cooling, the temperature of the cooling box is controlled to be between -5°C and -3°C.

[0012] In one of the embodiments, a low-positioned first nano-laser texture and a high-positioned second nano-laser texture are processed in the mold cavity; during injection molding, a high-temperature liquid soft glue and a high-temperature liquid hard glue are selected and injected into the mold cavity in no particular order, and the liquid glues injected twice cover the first nano-texture and the second nano-texture respectively. The liquid glue injected later needs to be injected after the liquid glue injected previously is cooled and solidified, so as to obtain a high-gloss plastic part with a combination of soft and hard glues and colorful textures; when cooling, the temperature of the cooling box is maintained at -3°C to 1°C for at least 4 hours.

[0013] In one of the embodiments, after the high-gloss plastic part with colorful texture is taken out from the mold cavity, the high-gloss plastic part is moved to a cooling box by a conveyor belt; on the conveyor belt's transfer path, the high-gloss plastic part passes through a high-temperature evaporation zone and a vacuum natural cooling zone before entering the cooling box; when the high-gloss plastic part passes through the high-temperature evaporation zone, the water vapor carried by the high-gloss plastic part is evaporated, and when the high-gloss plastic part passes through the vacuum natural cooling zone, the high-gloss plastic part is naturally cooled.

[0014] In one of the embodiments, the conveyor belt is provided with a plurality of molding molds arranged at intervals, the molding molds are provided with a mold cavity, the mold cavity matches the size of the mold cavity, and the mold cavity is provided with a structure that is the same as the high-gloss nano-texture structure; in the step of transferring the high-gloss plastic part to the conveyor belt, the high-gloss plastic part is taken out of the mold cavity by a robot and placed in the mold cavity, keeping the colorful texture aligned with the high-gloss nano-texture structure in the mold cavity; at the position where the vacuum natural cooling zone is connected to the cooling box, another robot grabs the high-gloss plastic part and puts it into the cooling box.

[0015] In one of the embodiments, while the high-gloss plastic part is being cooled in a cooling box, the colorful texture is continuously irradiated with strong UV light.

[0016] In one embodiment, after the high-gloss plastic part is cooled in a cooling box for 1 to 2 hours, the fan is controlled to blow air to cool the colorful texture.

[0017] In the second aspect of the present invention

[0018] The present invention provides a high-gloss plastic part, which is prepared by adopting the above-mentioned preparation process.

[0019] In one embodiment, the high-gloss plastic part is a tablet protective cover, and the colorful texture on the high-gloss plastic part is formed on the back side of the tablet protective cover.

[0020] It can be seen from the above technical solutions that the embodiments of the present invention have at least the following advantages and positive effects:

[0021] The preparation process of the scratch-resistant colorful textured plastic parts of the embodiment of the present invention and the high-gloss plastic parts prepared by the process are obtained by injecting high-temperature liquid glue in the mold cavity and then rapidly cooling to obtain the high-gloss plastic parts with colorful textures. After the high-gloss plastic parts are taken out of the mold cavity, they are not naturally cooled slowly or rapidly. Because whether it is natural cooling for less than 10-15 days or rapid cooling for 1-2 hours (or the cooling temperature is not controlled correctly), it is impossible to ensure that the colorful texture has a scratch-resistant effect. Even if the conventional natural cooling for 10-15 days can obtain the scratch-resistant effect of the colorful texture matching the present solution, the time is too long and does not meet the requirements of mass product production and timely batch shipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0023] Figure 1 The figure is a schematic diagram of a process flow for preparing a high-gloss plastic part according to an embodiment of the present invention. DETAILED DESCRIPTION

[0024] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially used for illustration purposes rather than for limiting the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0026] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] See also Figure 1 The present invention provides a preparation process of a scratch-resistant colorful textured plastic part, comprising the following steps:

[0028] Step S10, processing the nano laser texture in the mold cavity to obtain a high light nano texture structure. The nano laser texture has a plurality of nano reflective mirrors with different inclination angles. The pattern of the nano laser texture can be diversified and customized according to the needs of the user. For example, the nano laser texture can include but is not limited to one of the types of text, pattern, image, badge, logo, etc. or a combination of at least two.

[0029] Step S20, inject high-temperature liquid glue into the mold cavity and cool it after injection molding to obtain a high-gloss plastic part with a colorful texture. The colorful texture of the high-gloss plastic part complements the high-gloss nano-texture structure in the mold cavity. Therefore, the colorful texture of the high-gloss plastic part also has a plurality of nano-reflective mirrors with different inclination angles. When in use, the colorful texture of the optical plastic part can present a colorful display effect at different angles. It should be noted that based on the demand for mass production of the injection molding process, the cooling time of this step is extremely short. The so-called cooling refers to the natural cooling of the injection molding material from a high temperature of several hundred degrees to about 50-60 degrees within tens of seconds.

[0030] Step S30, after taking out the high-gloss plastic part with colorful texture from the mold cavity, immediately place it in a cooling box and maintain -5℃~6℃ for at least 4 hours to obtain a high-gloss plastic part with scratch-resistant colorful texture. In particular, the injection molding material of the high-gloss plastic part can be soft glue or hard glue. When the material of the high-gloss plastic part is soft glue, during the injection molding in step S20, the high-temperature liquid soft glue is selected to be injected into the mold cavity; during the cooling in step S30, the temperature of the cooling box is controlled between 1℃~6℃. When the material of the high-gloss plastic part is hard glue, during the injection molding in step S20, the high-temperature liquid hard glue is selected to be injected into the mold cavity; during the cooling in step S30, the temperature of the cooling box is controlled between -5℃~-3℃. The soft glue can be selected from TPU, TPE, silicone. The hard glue can be selected from UV glue, epoxy resin glue, etc.

[0031] The preparation process of the scratch-resistant colorful texture plastic parts of the embodiment of the present invention and the high-gloss plastic parts prepared by the process, after the high-temperature liquid glue is injected into the mold cavity and then quickly cooled to obtain the high-gloss plastic parts with colorful textures, and after the high-gloss plastic parts are taken out from the mold cavity, there is no natural slow cooling, nor is there a rapid cooling, because whether it is natural cooling for less than 10-15 days, or rapid cooling for 1-2 hours (or the cooling temperature is not properly controlled), it is impossible to ensure that the colorful texture has a scratch-resistant effect. Even if the conventional natural cooling for 10-15 days can obtain the scratch-resistant effect of the colorful texture matching the present scheme, the time is too long and does not meet the requirements of mass product production and timely batch shipment. It needs to be explained that if the high-gloss plastic parts are taken out of the mold cavity and quickly cooled (within 1-2 hours or shorter), the molecules can form an ordered subcrystalline structure, and the obtained high-gloss plastic parts will be harder and more brittle. The colorful texture on the high-gloss surface of the harder and more brittle high-gloss plastic parts is easier to be scratched off. After the high-gloss plastic parts are taken out of the mold cavity, they are immediately placed in a cooling box and maintained at -5℃ to 6℃ for at least 4 hours. The grains of the material can gradually grow and arrange into an orderly structure, thus forming a softer and tougher material. The colorful texture on the surface of the soft high-gloss plastic parts is not easily scratched.

[0032] In one embodiment, a first low-level nano-laser texture and a second high-level nano-laser texture are processed in the mold cavity; during injection molding, a high-temperature liquid soft glue and a high-temperature liquid hard glue can be selected and injected into the mold cavity in no particular order, and the liquid glues injected twice cover the first nano-texture and the second nano-texture respectively. The liquid glue injected later needs to be cooled and solidified after the liquid glue injected the previous time, so that a high-gloss plastic part with a combination of soft and hard glue and colorful texture can be obtained; the two nano-texture structures are located near the bonding surface of the soft glue and the hard glue. When cooling, maintain the temperature of the cooling box at -3℃~1℃ for at least 4 hours. The selection of soft glue and hard glue can refer to the above embodiment. In this embodiment, when cooling, when the hard glue and the soft glue are cooled, their internal molecules can interact with each other at the bonding surface, avoiding deformation and volume reduction of the soft glue due to too low temperature, and the traction of the soft glue molecules balances the insufficient cooling temperature of the hard glue.

[0033] In one embodiment, after the high-gloss plastic part with colorful texture is taken out from the mold cavity, the high-gloss plastic part is moved to a cooling box by a conveyor belt; on the conveyor belt's transfer path, the high-gloss plastic part passes through a high-temperature evaporation zone and a vacuum natural cooling zone before entering the cooling box; when the high-gloss plastic part passes through the high-temperature evaporation zone, the water vapor carried by the high-gloss plastic part is evaporated, and when the high-gloss plastic part passes through the vacuum natural cooling zone, the high-gloss plastic part is naturally cooled. This embodiment can prevent the high-gloss plastic part from being attached to water vapor in the air when it is moved to the cooling box, which affects the arrangement of the internal molecules of the high-gloss plastic part when it is cooled. The water vapor can be evaporated in the high-temperature evaporation zone in advance, and then the high-gloss plastic part is cooled to about 50-60 degrees Celsius (equivalent to the temperature of rapid natural cooling in the mold) in the vacuum natural cooling zone before entering the cooling box.

[0034] In one embodiment, a plurality of fixed molds arranged at intervals are provided on the conveyor belt, and the fixed mold is provided with a mold cavity, the mold cavity matches the size of the mold cavity, and a structure identical to the high-gloss nano-texture structure is provided in the mold cavity; in the step of transferring the high-gloss plastic part to the conveyor belt, the high-gloss plastic part is taken out of the mold cavity by a robot and placed in the mold cavity, keeping the colorful texture aligned with the high-gloss nano-texture structure in the mold cavity; at the position where the vacuum natural cooling zone is connected to the cooling box, another robot grabs the high-gloss plastic part and puts it into the cooling box. In this embodiment, based on the setting of the fixed mold, the possibility of deformation of the high-gloss plastic part due to the increase in temperature in the high-temperature evaporation zone can be avoided, the shape of the product can be maintained, and the product quality can be improved.

[0035] In one embodiment, while the high-gloss plastic part is in the cooling box and continuously cooled, the colorful texture is continuously irradiated with strong UV light. In one embodiment, after the high-gloss plastic part is in the cooling box and continuously cooled for 1 to 2 hours, the fan is controlled to blow air to cool the colorful texture.

[0036] The high-gloss plastic parts prepared by the above preparation process can be tablet protective covers, mobile phone protective covers, badges, and various plastic decorative parts. Among them, when the high-gloss plastic part is a protective cover, a colorful texture can be formed on the back of the tablet protective cover or the back of the mobile phone protective cover to enhance the texture and grade during use. The high-gloss plastic part prepared by the above preparation process can also be a watch strap, and the colorful texture on the high-gloss plastic part can be arranged on the entire watch strap, and the colorful texture extends along the length of the watch strap. Of course, the arrangement position and form of the colorful texture on the protective cover and the watch strap may not be limited in other embodiments.

[0037] Example 1

[0038] Step S10, processing a nano laser texture in a mold cavity to obtain a high light nano texture structure.

[0039] Step S20, injecting high-temperature liquid TPU soft glue into the mold cavity and cooling it after injection molding to obtain a high-gloss plastic part with a colorful texture, wherein the colorful texture of the high-gloss plastic part complements the high-gloss nano-texture structure in the mold cavity.

[0040] Step S30, after taking out the high-gloss plastic part with colorful texture from the mold cavity, immediately place it in a cooling box and maintain the temperature at 1°C for 4 hours.

[0041] After step S30 is completed, the texture is scratched by a finger to verify that the texture is not scratched; the colorful effect of the colorful texture is observed from different viewing angles, and it is no different from the effect before the texture is scratched.

[0042] Example 2

[0043] Step S10, processing a nano laser texture in a mold cavity to obtain a high light nano texture structure.

[0044] Step S20, injecting high-temperature liquid TPE soft glue into the mold cavity and cooling it after injection molding to obtain a high-gloss plastic part with a colorful texture, wherein the colorful texture of the high-gloss plastic part complements the high-gloss nano-texture structure in the mold cavity.

[0045] Step S30, after taking out the high-gloss plastic part with colorful texture from the mold cavity, immediately place it in a cooling box and maintain the temperature at 6°C for 5 hours.

[0046] After step S30 is completed, the texture is scratched by a finger to verify that the texture is not scratched; the colorful effect of the colorful texture is observed from different viewing angles, and it is no different from the effect before the texture is scratched.

[0047] Example 3

[0048] Step S10, processing a nano laser texture in a mold cavity to obtain a high light nano texture structure.

[0049] Step S20, injecting high-temperature liquid UV hard glue into the mold cavity and cooling it after injection molding to obtain a high-gloss plastic part with a colorful texture, wherein the colorful texture of the high-gloss plastic part complements the high-gloss nano-texture structure in the mold cavity.

[0050] Step S30, after taking out the high-gloss plastic part with colorful texture from the mold cavity, immediately place it in a cooling box and maintain the temperature at -5°C for 4 hours.

[0051] After step S30 is completed, the texture is scratched by a finger to verify that the texture is not scratched; the colorful effect of the colorful texture is observed from different viewing angles, and it is no different from the effect before the texture is scratched.

[0052] Example 4

[0053] Step S10, processing a nano laser texture in a mold cavity to obtain a high light nano texture structure.

[0054] Step S20, injecting high-temperature liquid UV hard glue into the mold cavity and cooling it after injection molding to obtain a high-gloss plastic part with a colorful texture, wherein the colorful texture of the high-gloss plastic part complements the high-gloss nano-texture structure in the mold cavity.

[0055] Step S30, after taking out the high-gloss plastic part with colorful texture from the mold cavity, immediately place it in a cooling box and maintain the temperature at -3°C for 5 hours.

[0056] After step S30 is completed, the texture is scratched by a finger to verify that the texture is not scratched; the colorful effect of the colorful texture is observed from different viewing angles, and it is no different from the effect before the texture is scratched.

[0057] Example 5

[0058] Step S10, processing a low-position first nanometer laser texture and a high-position second nanometer laser texture in the mold cavity to obtain a high-light nanometer texture structure.

[0059] Step S20, select high-temperature liquid TPU soft glue and high-temperature liquid UV hard glue in the mold cavity in sequence and inject them into the mold cavity in no particular order, the liquid glues injected twice cover the first nanotexture and the second nanotexture respectively, and the liquid glue injected later needs to be injected after the liquid glue injected previously is cooled and solidified, so that a high-gloss plastic part with a combination of soft and hard glue and a colorful texture can be obtained; the two nano-texture structures are located near the bonding surface of the soft glue and the hard glue, and the colorful texture of the high-gloss plastic part complements the high-gloss nano-texture structure in the mold cavity.

[0060] Step S30, after taking out the high-gloss plastic part with colorful texture from the mold cavity, immediately place it in a cooling box and maintain the temperature at -3°C for 4 hours.

[0061] After step S30 is completed, the texture is scratched by a finger to verify that the texture is not scratched; the colorful effect of the colorful texture is observed from different viewing angles, and it is no different from the effect before the texture is scratched.

[0062] Example 6

[0063] Step S10, processing a low-position first nanometer laser texture and a high-position second nanometer laser texture in the mold cavity to obtain a high-light nanometer texture structure.

[0064] Step S20, select high-temperature liquid TPU soft glue and high-temperature liquid UV hard glue in the mold cavity in sequence and inject them into the mold cavity in no particular order, the liquid glues injected twice cover the first nanotexture and the second nanotexture respectively, and the liquid glue injected later needs to be injected after the liquid glue injected previously is cooled and solidified, so that a high-gloss plastic part with a combination of soft and hard glue and a colorful texture can be obtained; the two nano-texture structures are located near the bonding surface of the soft glue and the hard glue, and the colorful texture of the high-gloss plastic part complements the high-gloss nano-texture structure in the mold cavity.

[0065] Step S30, after taking out the high-gloss plastic part with colorful texture from the mold cavity, immediately place it in a cooling box and maintain the temperature at -2°C for 4 hours.

[0066] After step S30 is completed, the texture is scratched by a finger to verify that the texture is not scratched; the colorful effect of the colorful texture is observed from different viewing angles, and it is no different from the effect before the texture is scratched.

[0067] Example 7

[0068] Step S10, processing a low-position first nanometer laser texture and a high-position second nanometer laser texture in the mold cavity to obtain a high-light nanometer texture structure.

[0069] Step S20, select high-temperature liquid TPU soft glue and high-temperature liquid UV hard glue in the mold cavity in sequence and inject them into the mold cavity in no particular order, the liquid glues injected twice cover the first nanotexture and the second nanotexture respectively, and the liquid glue injected later needs to be injected after the liquid glue injected previously is cooled and solidified, so that a high-gloss plastic part with a combination of soft and hard glue and a colorful texture can be obtained; the two nano-texture structures are located near the bonding surface of the soft glue and the hard glue, and the colorful texture of the high-gloss plastic part complements the high-gloss nano-texture structure in the mold cavity.

[0070] Step S30, after taking out the high-gloss plastic part with colorful texture from the mold cavity, immediately place it in a cooling box and maintain the temperature at 1°C for 4 hours.

[0071] After step S30 is completed, the texture is scratched by a finger to verify that the texture is not scratched; the colorful effect of the colorful texture is observed from different viewing angles, and it is no different from the effect before the texture is scratched.

[0072] Example 8

[0073] Step S10, processing a nano laser texture in a mold cavity to obtain a high light nano texture structure.

[0074] Step S20, injecting high-temperature liquid TPU soft glue into the mold cavity and cooling it after injection molding to obtain a high-gloss plastic part with a colorful texture, wherein the colorful texture of the high-gloss plastic part complements the high-gloss nano-texture structure in the mold cavity.

[0075] Step S30, after taking the high-gloss plastic part with colorful texture out of the mold cavity, move the high-gloss plastic part to the cooling box through the conveyor belt; on the conveyor belt's transfer path, make the high-gloss plastic part pass through the high-temperature evaporation zone and the vacuum natural cooling zone in turn and then enter the cooling box; when the high-gloss plastic part passes through the high-temperature evaporation zone, the water vapor carried by the high-gloss plastic part is evaporated, and when the high-gloss plastic part passes through the vacuum natural cooling zone, the high-gloss plastic part is naturally cooled; at the position where the vacuum natural cooling zone and the cooling box are connected, another robot grabs the high-gloss plastic part and puts it into the cooling box; the high-gloss plastic part is placed in the cooling box and maintained at 1°C for 4 hours.

[0076] After step S30 is completed, the texture is scratched by a finger to verify that the texture is not scratched; the colorful effect of the colorful texture is observed from different viewing angles, and there is no difference from the effect before the texture is scratched; and the yield rate of the product is effectively improved compared with Example 1, and the defective rate of the product due to deformation is reduced.

[0077] Comparative Example 1

[0078] Step S10, processing a nano laser texture in a mold cavity to obtain a high light nano texture structure.

[0079] Step S20, injecting high-temperature liquid TPU soft glue into the mold cavity and cooling it after injection molding to obtain a high-gloss plastic part with a colorful texture, wherein the colorful texture of the high-gloss plastic part complements the high-gloss nano-texture structure in the mold cavity.

[0080] Step S30, after taking out the high-gloss plastic part with colorful texture from the mold cavity, immediately place it in a cooling box and maintain the temperature at -3°C for 4 hours.

[0081] After step S30 is completed, the texture is scratched by a finger to verify that the texture is scratched off; the colorful effect of the colorful texture observed from different viewing angles is not as ideal as the effect before the texture is scratched.

[0082] Comparative Example 2

[0083] Step S10, processing a nano laser texture in a mold cavity to obtain a high light nano texture structure.

[0084] Step S20, injecting high-temperature liquid TPU soft glue into the mold cavity and cooling it after injection molding to obtain a high-gloss plastic part with a colorful texture, wherein the colorful texture of the high-gloss plastic part complements the high-gloss nano-texture structure in the mold cavity.

[0085] Step S30, after taking out the high-gloss plastic part with colorful texture from the mold cavity, immediately place it in a cooling box and maintain the temperature at -7°C for 4 hours.

[0086] After step S30 is completed, the texture is scratched by a finger to verify that the texture is scratched off; the colorful effect of the colorful texture observed from different viewing angles is not as ideal as the effect before the texture is scratched.

[0087] Comparative Example 3

[0088] Step S10, processing a nano laser texture in a mold cavity to obtain a high light nano texture structure.

[0089] Step S20, injecting high-temperature liquid UV hard glue into the mold cavity and cooling it after injection molding to obtain a high-gloss plastic part with a colorful texture, wherein the colorful texture of the high-gloss plastic part complements the high-gloss nano-texture structure in the mold cavity.

[0090] Step S30, after taking out the high-gloss plastic part with colorful texture from the mold cavity, immediately place it in a cooling box and maintain the temperature at -6°C for 4 hours.

[0091] After step S30 is completed, the texture is scratched by a finger to verify that the texture is scratched off; the colorful effect of the colorful texture observed from different viewing angles is not as ideal as the effect before the texture is scratched.

[0092] Comparative Example 4

[0093] Step S10, processing a nano laser texture in a mold cavity to obtain a high light nano texture structure.

[0094] Step S20, injecting high-temperature liquid UV hard glue into the mold cavity and cooling it after injection molding to obtain a high-gloss plastic part with a colorful texture, wherein the colorful texture of the high-gloss plastic part complements the high-gloss nano-texture structure in the mold cavity.

[0095] Step S30, after taking out the high-gloss plastic part with colorful texture from the mold cavity, immediately place it in a cooling box and maintain the temperature at -2°C for 4 hours.

[0096] After step S30 is completed, the texture is scratched by a finger to verify that the texture is scratched off; the colorful effect of the colorful texture observed from different viewing angles is not as ideal as the effect before the texture is scratched.

[0097] Comparative Example 5

[0098] Step S10, processing a low-position first nanometer laser texture and a high-position second nanometer laser texture in the mold cavity to obtain a high-light nanometer texture structure.

[0099] Step S20, select high-temperature liquid TPU soft glue and high-temperature liquid UV hard glue in the mold cavity in sequence and inject them into the mold cavity in no particular order, the liquid glues injected twice cover the first nanotexture and the second nanotexture respectively, and the liquid glue injected later needs to be injected after the liquid glue injected previously is cooled and solidified, so that a high-gloss plastic part with a combination of soft and hard glue and a colorful texture can be obtained; the two nano-texture structures are located near the bonding surface of the soft glue and the hard glue, and the colorful texture of the high-gloss plastic part complements the high-gloss nano-texture structure in the mold cavity.

[0100] Step S30, after taking out the high-gloss plastic part with colorful texture from the mold cavity, immediately place it in a cooling box and maintain the temperature at -5°C for 4 hours.

[0101] After step S30 is completed, the texture is scratched by a finger to verify that the texture is not scratched; the colorful effect of the colorful texture is observed from different viewing angles, and the colorful effect is not as ideal as that of embodiments 5 and 6.

[0102] Comparative Example 6

[0103] Step S10, processing a low-position first nanometer laser texture and a high-position second nanometer laser texture in the mold cavity to obtain a high-light nanometer texture structure.

[0104] Step S20, select high-temperature liquid TPU soft glue and high-temperature liquid UV hard glue in the mold cavity in sequence and inject them into the mold cavity in no particular order, the liquid glues injected twice cover the first nanotexture and the second nanotexture respectively, and the liquid glue injected later needs to be injected after the liquid glue injected previously is cooled and solidified, so that a high-gloss plastic part with a combination of soft and hard glue and a colorful texture can be obtained; the two nano-texture structures are located near the bonding surface of the soft glue and the hard glue, and the colorful texture of the high-gloss plastic part complements the high-gloss nano-texture structure in the mold cavity.

[0105] Step S30, after taking out the high-gloss plastic part with colorful texture from the mold cavity, immediately place it in a cooling box and maintain the temperature at 2°C for 4 hours.

[0106] After step S30 is completed, the texture is scratched by a finger to verify that the texture is not scratched; the colorful effect of the colorful texture is observed from different viewing angles, and the colorful effect is not as ideal as that of embodiments 5 and 6.

[0107] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present invention can be embodied in a variety of forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A process for preparing a scratch-resistant colorful textured plastic part, characterized in that: The steps include: Processing nano-laser textures in the mold cavity to obtain high-gloss nano-texture structures; Injecting high-temperature liquid glue into the mold cavity and cooling it after injection molding to obtain a high-gloss plastic part with a colorful texture, wherein the colorful texture of the high-gloss plastic part is complementary to the high-gloss nano-texture structure in the mold cavity; The high-gloss plastic part with colorful texture is taken out from the mold cavity and immediately placed in a cooling box to maintain a temperature of -5°C to 6°C for at least 4 hours to obtain a high-gloss plastic part with scratch-resistant colorful texture.

2. The preparation process according to claim 1, characterized in that: During injection molding, high-temperature liquid soft glue is selected to be injected into the mold cavity; during cooling, the temperature of the cooling box is controlled between 1°C and 6°C.

3. The preparation process according to claim 1, characterized in that: During injection molding, high-temperature liquid hard glue is selected to be injected into the mold cavity; during cooling, the temperature of the cooling box is controlled between -5℃ and -3℃.

4. The preparation process according to claim 1, characterized in that: The mold cavity is processed with a low-position first nano-laser texture and a high-position second nano-laser texture; during injection molding, a high-temperature liquid soft glue and a high-temperature liquid hard glue are selected and injected into the mold cavity in no particular order, and the liquid glues injected twice cover the first nano-texture and the second nano-texture respectively. The liquid glue injected later needs to be injected after the liquid glue injected once is cooled and solidified, so as to obtain a high-gloss plastic part with a combination of soft and hard glues and colorful textures; when cooling, the temperature of the cooling box is maintained at -3°C to 1°C for at least 4 hours.

5. The preparation process according to claim 1, characterized in that: After the high-gloss plastic parts with colorful textures are taken out from the mold cavity, the high-gloss plastic parts are moved to the cooling box by the conveyor belt; on the transfer path of the conveyor belt, the high-gloss plastic parts successively pass through the high-temperature evaporation zone and the vacuum natural cooling zone before entering the cooling box; when the high-gloss plastic parts pass through the high-temperature evaporation zone, the water vapor carried by the high-gloss plastic parts is evaporated, and when the high-gloss plastic parts pass through the vacuum natural cooling zone, the high-gloss plastic parts are naturally cooled.

6. The preparation process according to claim 5, characterized in that: The conveyor belt is provided with a plurality of shaping molds arranged at intervals, the shaping molds are provided with a mold cavity, the mold cavity matches the size of the mold cavity, and the mold cavity is provided with a structure identical to the high-gloss nano-texture structure; in the step of transferring the high-gloss plastic part to the conveyor belt, the high-gloss plastic part is taken out of the mold cavity by a robot and placed in the mold cavity, keeping the colorful texture aligned with the high-gloss nano-texture structure in the mold cavity; at the position where the vacuum natural cooling zone is connected to the cooling box, another robot grabs the high-gloss plastic part and puts it into the cooling box.

7. The preparation process according to claim 1, characterized in that: While the high-gloss plastic parts are being cooled in the cooling box, they are also being continuously exposed to strong UV light.

8. The preparation process according to claim 1, characterized in that: After the high-gloss plastic parts are cooled in the cooling box for 1 to 2 hours, the fan is controlled to blow air to cool the colorful texture.

9. A high-gloss plastic part, characterized in that: The high-gloss plastic part is prepared by using the preparation process described in any one of claims 1 to 8.

10. The high-gloss plastic part according to claim 9, characterized in that: The high-gloss plastic part is a tablet protective cover, a mobile phone protective cover or a watch strap.

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