Glass fiber and polyurethane integrated forming process and mobile phone rear cover

Abstract

The invention relates to the technical field of composite forming, in particular to a glass fiber and polyurethane integrated forming process which comprises the following steps: taking polyurethane leather and a glass fiber plate, punching the polyurethane leather and the glass fiber plate through a punching machine to form a position avoiding hole and a position avoiding groove, sequentially stacking the polyurethane leather and the glass fiber plate, and forming the polyurethane leather and the glass fiber plate into a whole; the position of the avoiding hole corresponds to the position of the avoiding groove; a LOGO module is taken and placed in the avoiding groove, one face of the LOGO module is exposed out of the avoiding hole, the structure of the LOGO module is matched with the structures of the avoiding hole and the avoiding groove, and the LOGO module is embedded into the polyurethane leather and the glass fiber board; the stacked polyurethane leather, the glass fiber board and the LOGO module are placed below a mold pressing jig of a hot press together to be subjected to hot pressing and integrated forming, and the appearance of a semi-finished product is cut and processed through CNC to obtain a finished product. According to the process provided by the invention, the glass fiber, the polyurethane, the LOGO part and the texture layer are integrally formed, and the process is applied to the rear cover of the mobile phone, so that the manufacturing process is simplified, and the yield of products is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of composite molding, and in particular to a process for integrally molding glass fiber and polyurethane and a mobile phone back cover. Background Art

[0002] Glass fiber is an inorganic non-metallic material with excellent performance and a wide variety of types. Its advantages are good insulation, strong heat resistance, good corrosion resistance, and high mechanical strength. Glass fiber is usually used as a reinforcing material in composite materials. Nowadays, when preparing mobile phone covers, continuous glass fiber cloth is generally used as a reinforcing layer. After curing, multiple layers are hot-pressed to obtain a glass fiber laminate. The polyurethane skin is hot-pressed between the cloth and the glass fiber pressing plate, and then the logo is pasted and the texture is processed to obtain the finished mobile phone cover. The actual production process is relatively complicated, and the performance of existing mobile phone covers is poor, the yield is not high, and cannot meet our needs. Summary of the invention

[0003] In order to solve the technical problems existing in the manufacturing process of the existing mobile phone cover, the present invention provides a process for integrally molding glass fiber and polyurethane and a mobile phone back cover.

[0004] In order to achieve the above object, the present invention provides the following technical solution: a process for integrally forming glass fiber and polyurethane, comprising the following steps:

[0005] Step S1: taking a polyurethane skin and a glass fiber board, punching the polyurethane skin and the glass fiber board with a punching machine to form avoidance holes and avoidance grooves, the polyurethane skin and the glass fiber board are stacked in sequence, and the positions of the avoidance holes and the avoidance grooves correspond to each other;

[0006] Step S2: taking a LOGO module and placing it in the avoidance groove, with one side of the LOGO module exposed to the avoidance hole, and the structure of the LOGO module matching the structures of the avoidance hole and the avoidance groove, so that the LOGO module is embedded in the polyurethane skin and the glass fiber board;

[0007] Step S3: placing the polyurethane skin, glass fiber board and LOGO module stacked in S2 under a hot press molding jig for hot pressing and integrally forming to obtain a semi-finished product.

[0008] Step S4: CNC is used to cut and process the semi-finished product to obtain a finished product.

[0009] Preferably, the step S3 specifically includes the following steps:

[0010] Step S31: placing the polyurethane skin, glass fiber board and LOGO module stacked in S2 under a hot press molding jig;

[0011] Step S32: placing a release texture film on top of the molding jig of the hot press;

[0012] Step S33: Start the hot press machine, and hot-press the release texture film on the top of the molding jig and the polyurethane skin, LOGO module and glass fiber board below the molding jig in sequence to obtain a semi-finished product.

[0013] Preferably, the surface of the polyurethane skin is sprayed with an excimer coating to obtain a modified layer, and the thickness of the modified layer is 0.01 to 0.02 mm.

[0014] Preferably, the thickness of the polyurethane skin is 0.2 mm.

[0015] Preferably, the glass fiber board comprises at least three layers, and the thickness of each layer of the glass fiber board is 0.1 mm.

[0016] Preferably, in step S3, the working temperature of the hot press is 120-140° C., the pressure is 5-80 t, and the hot pressing time is 5-10 min.

[0017] Preferably, the texture of the release texture film is lychee texture or snakeskin texture.

[0018] The present invention also provides a mobile phone back cover, which is made by the process method described above. The mobile phone back cover includes a texture layer, a polyurethane layer and at least three glass fiber layers formed in sequence. The LOGO module is embedded in the polyurethane layer and the glass fiber layer and exposed on the polyurethane layer.

[0019] Preferably, the glass fiber layer has a thickness of 0.1 mm, and the polyurethane layer has a thickness of 0.2 mm.

[0020] Preferably, the texture layer has a lychee texture or a snakeskin texture.

[0021] By implementing the above technical scheme, the following technical effects are achieved: the process of integrally molding glass fiber and polyurethane provided by the present invention enables the glass fiber board, polyurethane skin, LOGO parts and texture layer to be integrally molded, simplifies the product production process, reduces the product thickness by 0.15 to 0.2 mm, improves the product's feel, and further effectively improves the yield of the product made by the process, reduces the cost of the process, and solves the problem of plushness of the product appearance through CNC processing. The process can be applied to the production of mobile phone back covers, solving the existing technical problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of a process for integrally molding glass fiber and polyurethane provided in accordance with the first embodiment of the present invention;

[0023] Figure 2 A schematic flow chart of a process step S3 for integrally forming glass fiber and polyurethane provided in the first embodiment of the present invention;

[0024] Figure 3 An enlarged cross-sectional view of a rear cover of a mobile phone provided in accordance with a second embodiment of the present invention;

[0025] Description of the accompanying drawings:

[0026] 1. Polyurethane layer; 2. Glass fiber layer; 3. LOGO module; 4. Texture layer; 21. First glass fiber layer; 22. Second glass fiber layer; 23. Third glass fiber layer. DETAILED DESCRIPTION

[0027] In order to better understand the technical solution of the present invention, the embodiments provided by the present invention are described in detail below with reference to the accompanying drawings.

[0028] See also Figure 1-2 The first embodiment of the present invention provides a process for integrally molding glass fiber and polyurethane, comprising the following steps:

[0029] Step S1: taking a polyurethane skin and a glass fiber board, punching the polyurethane skin and the glass fiber board with a punching machine to form avoidance holes and avoidance grooves, and stacking the polyurethane skin and the glass fiber board in sequence, with the avoidance holes and the avoidance grooves corresponding to each other;

[0030] Step S2: taking the LOGO module and placing it in the avoidance groove, with one side of the LOGO module exposed to the avoidance hole, and the structure of the LOGO module matching the structure of the avoidance hole and the avoidance groove, so that the LOGO module is embedded in the polyurethane skin and the glass fiber board;

[0031] Step S3: placing the polyurethane skin, glass fiber board and LOGO module stacked in S2 under a hot press molding jig for hot pressing and integrally forming to obtain a semi-finished product.

[0032] Step S4: CNC is used to cut and process the semi-finished product to obtain a finished product.

[0033] Specifically, CNC can automatically control the cutting process, significantly improve production efficiency, reduce miscutting, improve product precision and quality, process the burrs and corners of the products, and solve the fuzz problem of the product appearance.

[0034] Based on the above first embodiment, in other embodiments, further, step S3 specifically includes the following steps:

[0035] Step S31: placing the polyurethane skin, glass fiber board and LOGO module stacked in S2 under a hot press molding jig;

[0036] Step S32: placing a release texture film on top of the molding jig of the hot press;

[0037] Step S33: Start the hot press machine, and hot-press the release texture film on the top of the molding jig and the polyurethane skin, LOGO module and glass fiber board below the molding jig in sequence to obtain a semi-finished product.

[0038] Therefore, the process of integrally molding glass fiber and polyurethane provided by the present invention enables the glass fiber board, polyurethane skin, LOGO part and texture layer to be integrally molded, simplifies the production process of the product, improves the feel of the product, and further effectively improves the yield of the product made by the process, reduces the cost of the process, and solves the problem of plushness of the product appearance through CNC processing. Specifically, the yield of the product is increased by 5% to 10%, and the cost of the product is reduced by 20%.

[0039] On the basis of the above-mentioned first embodiments, in other embodiments, further, the surface of the polyurethane skin is sprayed with a quasi-molecular coating to obtain a modified layer, and the thickness of the modified layer is 0.01 to 0.02 mm. The purpose of the modified layer is to improve the feel of the product and make it more comfortable for users to use.

[0040] On the basis of the above first embodiments, in other embodiments, further, the thickness of the polyurethane skin is 0.2 mm, so that the product thickness is reduced by 0.15-0.2 mm compared with the existing products.

[0041] On the basis of the above-mentioned first embodiments, in other embodiments, further, the glass fiber board includes at least three layers, and the thickness of each layer of the glass fiber board is 0.1 mm, which further ensures the hardness of the product and improves the performance of the product.

[0042] On the basis of the above-mentioned first embodiments, in other embodiments, further, in step S3, the working temperature of the hot press is 120-140°C, the pressure is 5-80t, the hot pressing molding time is 5-10min, followed by cooling and shaping, and a semi-finished product is obtained after cooling.

[0043] On the basis of the above-mentioned first embodiments, in other embodiments, further, the texture of the release texture film is lychee texture or snake skin texture. In this embodiment, the texture of the release texture film is lychee texture, which not only ensures the beauty of the product, but also effectively improves the feel of the product.

[0044] See also Figure 3The present invention also provides a second embodiment, a mobile phone back cover, which is made by the process of integrally molding glass fiber and polyurethane of the first embodiment. The mobile phone back cover includes a texture layer 4, a polyurethane layer 1 and at least three glass fiber layers 2 formed in sequence. In this embodiment, the glass fiber layer 2 includes a first glass fiber layer 21, a second glass fiber layer 22 and a third glass fiber layer 23, and a LOGO module 3 is embedded in the polyurethane layer 1 and the glass fiber layer 3, and is exposed on the polyurethane layer 1.

[0045] On the basis of the above second embodiment, in other embodiments, further, the thickness of the first glass fiber layer 21, the second glass fiber layer 22 and the third glass fiber layer 23 is 0.1 mm, and the thickness of the polyurethane layer 1 is 0.2 mm.

[0046] Based on the above second embodiment, in other embodiments, further, the texture of the texture layer 4 is lychee texture or snake skin texture.

[0047] Therefore, the overall thickness of the mobile phone back cover provided in this embodiment is reduced by at least 0.15 to 0.2 mm, which improves the feel of the product, effectively reduces the cost, and effectively improves the yield of the product.

[0048] The above is a detailed introduction to the process of integrally molding glass fiber and polyurethane and the mobile phone back cover provided in the embodiment of the present invention. For a general technician in this field, according to the ideas of the embodiments of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A process for integrally molding glass fiber and polyurethane, characterized in that: The steps include: Step S1: taking a polyurethane skin and a glass fiber board, punching the polyurethane skin and the glass fiber board with a puncher to form avoidance holes and avoidance grooves, and stacking the polyurethane skin and the glass fiber board in sequence, with the avoidance holes and the avoidance grooves corresponding to each other; Step S2: taking a LOGO module and placing it in the avoidance groove, with one side of the LOGO module exposed to the avoidance hole, and the structure of the LOGO module matching the structure of the avoidance hole and the avoidance groove, so that the LOGO module is embedded in the polyurethane skin and the fiberglass board; Step S3: placing the polyurethane skin, glass fiber board and LOGO module stacked in S2 under a hot press molding jig for hot pressing and forming the semi-finished product; Step S4: CNC cutting is performed on the semi-finished product to obtain the finished product.

2. The process for integrally molding glass fiber and polyurethane according to claim 1, characterized in that: The step S3 specifically includes the following steps: Step S31: placing the polyurethane skin, fiberglass board and LOGO module stacked in S2 under a hot press molding jig; Step S32: placing a release texture film on top of the molding jig of the hot press; Step S33: Start the hot press to hot-press the release texture film on the upper part of the molding jig and the polyurethane skin, LOGO module and glass fiber board on the lower part of the molding jig in sequence to obtain a semi-finished product.

3. The process for integrally molding glass fiber and polyurethane according to claim 2, characterized in that: The surface of the polyurethane skin is sprayed with an excimer coating to obtain a modified layer, and the thickness of the modified layer is 0.01 to 0.02 mm.

4. The process for integrally molding glass fiber and polyurethane according to claim 1, characterized in that: The thickness of the polyurethane skin is 0.2 mm.

5. The process for integrally molding glass fiber and polyurethane according to claim 1, characterized in that: The glass fiber board comprises at least three layers, and the thickness of each layer of the glass fiber board is 0.1 mm.

6. The process for integrally molding glass fiber and polyurethane according to claim 1, characterized in that: In step S3, the operating temperature of the hot press is 120-140° C., the pressure is 5-80t, and the hot pressing time is 5-10 minutes.

7. The process for integrally molding glass fiber and polyurethane according to claim 1, characterized in that: The texture of the release texture film is lychee texture or snake skin texture.

8. A mobile phone back cover, characterized by: The mobile phone back cover is manufactured using the process described in any one of claims 1 to 7, comprising a texture layer, a polyurethane layer and at least three glass fiber layers formed in sequence, and the LOGO module is embedded in the polyurethane layer and the glass fiber layer and exposed on the polyurethane layer.

9. The mobile phone back cover according to claim 8, characterized in that: The thickness of the glass fiber layer is 0.1 mm, and the thickness of the polyurethane layer is 0.2 mm.

10. The mobile phone back cover according to claim 8, characterized in that: The texture layer has a pattern of lychee or snakeskin.

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