Mobile phone rear cover TPU decorative layer processing device based on IML technology
By designing a TPU decorative layer processing device including an electric telescopic rod and a driving motor, the TPU surface curling problem is solved, ensuring the uniform formation of the hardened film and improving the processing quality.
Patent Information
- Application Number
- CN202420905078.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-28
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-04-28
AI Technical Summary
In the prior art, the TPU decorative layer of the mobile phone back cover based on IML process lacks the function of leveling the TPU surface during processing, resulting in the possible curling of the TPU surface, affecting the formation of the hardened film.
A processing device including a conveyor belt, an external frame, a rectangular frame that can be moved up and down, a driving motor, a forward and reverse screw, an elastic connection mechanism and a deployed press roller are designed. Through the synergy of the electric telescopic rod and the driving motor, Unfold the press roller to roll the surface of the TPU to ensure its flat state.
It effectively avoids the surface curling of the TPU, ensures the uniform formation of the hardened film, and improves the quality of the subsequent spraying process.
Smart Images
Figure CN222245741U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of TPU processing, in particular to a TPU decorative layer processing device for a mobile phone back cover based on an IML process. Background Art
[0002] TPU is an innovative material used in the fields of automobiles, homes, consumer electronics, etc. It has the advantages of good durability, color diversity, and process plasticity.
[0003] The structure of the TPU decorative layer of the mobile phone back cover based on the IML process in the prior art is as follows: Figure 7 During the processing, it is necessary to cover the back of TPU with a layer of PC or ABS, and then coat the front of TPU with a layer of hardening film.
[0004] However, in the prior art, before the TPU device layer is processed and sprayed with hardening coating to form a hardened film, there is a lack of the function of leveling the TPU surface. The TPU surface transported to the spraying position may be curled, affecting the formation of the hardened film during subsequent spraying. Utility Model Content
[0005] The purpose of the utility model is to provide a TPU decorative layer processing device for a mobile phone back cover based on the IML process to solve the problems raised in the above background technology.
[0006] The purpose of the utility model can be achieved through the following technical solutions:
[0007] A mobile phone back cover TPU decorative layer processing device based on IML process, comprising a conveyor belt and an external frame, the conveyor belt passes through the external frame, a rectangular frame that can move up and down is arranged inside the external frame, a driving motor is fixedly installed on one side of the rectangular frame, the output end of the driving motor is fixedly connected to a forward screw, and one end of the forward screw is located in the rectangular frame and is fixedly connected to a reverse screw.
[0008] The forward screw and the reverse screw are each threadedly connected with a movable block, the bottom of the movable block is fixedly connected with a retractable elastic connection mechanism, the bottom of the elastic connection mechanism is fixedly connected with a rectangular bracket, the rectangular bracket is fixedly connected with a central axis, and the outer surface of the central axis is rotatably connected with an unfolding roller.
[0009] Preferably, an electric telescopic rod is fixedly connected to the top of the external frame, and the bottom of the electric telescopic rod is fixedly connected to one side of the rectangular frame to drive the rectangular frame to move up and down.
[0010] Preferably, a connecting pipe is fixedly connected inside the external frame, an input pipe for inputting hardened film coating is fixedly connected to the top of the connecting pipe, and a plurality of nozzles are fixedly connected to the bottom of the connecting pipe.
[0011] Preferably, the movable block is slidably connected to the rectangular frame, one end of the reverse screw is rotatably connected to the rectangular frame, and the thread directions of the forward screw and the reverse screw are opposite.
[0012] Preferably, the elastic connection mechanism comprises a fixed sleeve fixed to the bottom of the movable block, a spring is fixedly connected inside the fixed sleeve, a movable shaft is fixedly connected to the bottom of the spring, and the bottom of the movable shaft is fixedly connected to the rectangular bracket.
[0013] Preferably, a negative pressure adsorption device is provided on the conveyor belt, TPU is provided on the top of the negative pressure adsorption device, and a decorative layer is connected to the back of the TPU.
[0014] Beneficial effects of the utility model:
[0015] The utility model extends the electric telescopic rod and rotates the driving motor, so that the two unfolding rollers are finally attached to the TPU surface and move away from each other, and the TPU surface is rolled, so that the TPU can be quickly unfolded to avoid curling of the TPU surface and influence on the formation of a hardened film during subsequent spraying. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0018] Figure 2 This utility model Figure 1 a cross-sectional view of the middle and outer frame;
[0019] Figure 3 This utility model Figure 1 Side view of the middle external frame;
[0020] Figure 4 This utility model Figure 2 Schematic diagram of the connection between the middle rectangular frame and the negative pressure adsorption device;
[0021] Figure 5 This utility model Figure 4 A schematic diagram of the structure of the elastic connection mechanism;
[0022] Figure 6 This utility model Figure 4 Schematic diagram of the structure of the medium negative pressure adsorption equipment;
[0023] Figure 7 It is a structural schematic diagram of the TPU decorative layer proposed by the utility model.
[0024] The reference numerals in the figures are as follows:
[0025] 1. Conveyor belt, 2. External frame, 3. Rectangular frame, 4. Driving motor, 5. Forward screw, 6. Reverse screw, 7. Movable block, 8. Elastic connecting mechanism, 81. Fixed sleeve, 82. Spring, 83. Movable shaft, 9. Rectangular bracket, 10. Center axis, 11. Expanding roller, 12. Electric telescopic rod, 13. Connecting pipe, 14. Input pipe, 15. Nozzle, 16. Negative pressure adsorption device, 17. TPU, 18. Decorative layer, 100. Hardened film layer. DETAILED DESCRIPTION
[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0027] A mobile phone back cover TPU decorative layer processing device based on IML process, comprising a conveyor belt 1 and an external frame 2, the conveyor belt 1 passes through the external frame 2, a rectangular frame 3 that can move up and down is arranged in the external frame 2, a driving motor 4 is fixedly installed on one side of the rectangular frame 3, the output end of the driving motor 4 is fixedly connected to a forward screw 5, and one end of the forward screw 5 is located in the rectangular frame 3 and is fixedly connected to a reverse screw 6.
[0028] The forward screw 5 and the reverse screw 6 are each threadedly connected to a movable block 7, the bottom of the movable block 7 is fixedly connected to a retractable elastic connecting mechanism 8, the bottom of the elastic connecting mechanism 8 is fixedly connected to a rectangular bracket 9, the rectangular bracket 9 is fixedly connected to a central axis 10, and the outer surface of the central axis 10 is rotatably connected to an unfolding roller 11.
[0029] like Figure 7 The TPU decorative layer of the back cover of the mobile phone based on the IML process is an existing technology, which includes TPU (thermoplastic polyurethane), the front of the TPU is a hardened film layer 100, and the back is an ABS (terpolymer of three monomers of acrylonitrile, butadiene, and styrene) or PC (polycarbonate) layer, which has the advantages of increasing the selectivity of automobile interior decoration materials and adding more aesthetic elements to the car.
[0030] The processing steps are as follows:
[0031] (1) Cover the back of TPU with a layer of PC or ABS;
[0032] (2) Apply a layer of hardening film on the front of TPU;
[0033] (3) Place it in the injection molding machine for IML one-piece molding;
[0034] (4) Perform post-injection modification according to the normal injection molding process.
[0035] The top of the external frame 2 is fixedly connected with an electric telescopic rod 12 , and the bottom of the electric telescopic rod 12 is fixedly connected to one side of the rectangular frame 3 , so as to drive the rectangular frame 3 to move up and down.
[0036] like Figure 1 and Figure 2 The telescopic end of the electric telescopic rod 12 is located in the external frame 2 and is fixed to the rectangular frame 3, and can drive the rectangular frame 3 to move up and down.
[0037] A connecting pipe 13 is fixedly connected inside the external frame 2 , an input pipe 14 for inputting hardened film coating is fixedly connected to the top of the connecting pipe 13 , and a plurality of nozzles 15 are fixedly connected to the bottom of the connecting pipe 13 .
[0038] like Figure 3 and Figure 4 One end of the input pipe 14 is connected to the external hardening film coating input device. When the negative pressure adsorption device 16 moves to the bottom of the nozzle 15, the hardening film coating can be input into the connecting pipe 13 through the input pipe 14, and then the hardening film coating is sprayed onto the surface of TPU17 through the nozzle 15 to form a hardened layer.
[0039] The movable block 7 is slidably connected to the rectangular frame 3, one end of the reverse screw 6 is rotationally connected to the rectangular frame 3, and the thread directions of the forward screw 5 and the reverse screw 6 are opposite.
[0040] like Figure 3 , the connection between the forward screw 5 and the reverse screw 6 is located in the middle position of the rectangular frame 3, so that.
[0041] The elastic connection mechanism 8 includes a fixed sleeve 81 fixed to the bottom of the movable block 7 , a spring 82 is fixedly connected inside the fixed sleeve 81 , a movable shaft 83 is fixedly connected to the bottom of the spring 82 , and the bottom of the movable shaft 83 is fixedly connected to the rectangular bracket 9 .
[0042] like Figure 4 and Figure 5 The top of the movable shaft 83 is located in the fixed sleeve 81, and the movable shaft 83 and the fixed sleeve 81 are connected by a spring 82, so that the entire elastic connection mechanism 8 can produce elastic expansion and contraction when it moves, avoiding the unfolding roller 11 from being too tightly pressed on the TPU17 and affecting the movement of the unfolding roller.
[0043] The conveyor belt 1 is provided with a negative pressure adsorption device 16 , a TPU 17 is provided on the top of the negative pressure adsorption device 16 , and a decorative layer 18 is connected to the back of the TPU 17 .
[0044] like Figure 4 The TPU 17 on the negative pressure adsorption device 16 has been covered with a layer of PC or ABS on the back to form a decorative layer 18. The decorative layer 18 is made of PC or ABS. The negative pressure adsorption device 16 is provided with an air pump and adsorption holes, which can stably adsorb the TPU on the negative pressure adsorption device 16.
[0045] The working principle of the TPU decorative layer processing device for the back cover of a mobile phone based on the IML process provided by the utility model is as follows:
[0046] Before the TPU 17 is sprayed with the hardening film coating by the nozzle 15 to form the hardening film, the electric telescopic rod 12 is extended to drive the rectangular frame 3 to move downward, and the movable block 7 and the elastic connecting mechanism 8 move downward accordingly, so that the bottom of the unfolding pressing roller 11 is pressed tightly against the surface of the TPU 17;
[0047] Then the driving motor 4 drives the forward screw 5 and the reverse screw 6 to rotate clockwise, so that the two movable blocks 7 drive the elastic connection mechanism 8 to move away from each other, and the rectangular bracket 9 and the unfolding roller 11 move away from each other accordingly, and the unfolding roller 11 rolls on the surface of the TPU to unfold the TPU, so that the surface of the TPU remains horizontal and is then transported to the nozzle 15 for spraying to form a hardened film;
[0048] Then the electric telescopic rod 12 contracts, driving the rectangular frame 3 to move upward, and the rectangular frame 3 drives the elastic connection mechanism 8 and the unfolding to move upward, and the driving motor 4 drives the forward screw 5 and the reverse screw 6 to rotate counterclockwise, so that the two movable blocks 7 approach each other, and the movable block 7 drives the rectangular bracket 9 and the unfolding roller 11 to approach each other through the elastic connection mechanism 8.
[0049] Compared with the related art, the TPU decorative layer processing device for the mobile phone back cover based on the IML process provided by the utility model has the following beneficial effects:
[0050] The utility model extends the electric telescopic rod 12 and rotates the driving motor 4, so that the two unfolding rollers 11 are finally attached to the surface of the TPU and move away from each other, rolling the surface of the TPU, so that the TPU can be quickly unfolded to avoid curling of the TPU surface and affecting the formation of a hardened film during subsequent spraying.
[0051] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.
Claims
1. A TPU decorative layer processing device for a mobile phone back cover based on the IML process, comprising a conveyor belt (1) and an external frame (2), wherein the conveyor belt (1) passes through the external frame (2), and is characterized in that: A rectangular frame (3) that can move up and down is arranged inside the external frame (2); a driving motor (4) is fixedly installed on one side of the rectangular frame (3); a forward screw rod (5) is fixedly connected to the output end of the driving motor (4); and a reverse screw rod (6) is fixedly connected to one end of the forward screw rod (5) and is located inside the rectangular frame (3); The forward screw (5) and the reverse screw (6) are each threadedly connected to a movable block (7); a retractable elastic connection mechanism (8) is fixedly connected to the bottom of the movable block (7); a rectangular bracket (9) is fixedly connected to the bottom of the elastic connection mechanism (8); a central shaft (10) is fixedly connected to the rectangular bracket (9); and an unfolding roller (11) is rotatably connected to the outer surface of the central shaft (10).
2. According to the IML process-based TPU decorative layer processing device for mobile phone back cover according to claim 1, it is characterized in that: The top of the external frame (2) is fixedly connected to an electric telescopic rod (12), and the bottom of the electric telescopic rod (12) is fixedly connected to one side of the rectangular frame (3) for driving the rectangular frame (3) to move up and down.
3. According to the IML process-based TPU decorative layer processing device for mobile phone back cover according to claim 1, it is characterized in that: A connecting pipe (13) is fixedly connected inside the external frame (2), an input pipe (14) for inputting hardened film coating is fixedly connected to the top of the connecting pipe (13), and a plurality of nozzles (15) are fixedly connected to the bottom of the connecting pipe (13).
4. According to the IML process-based TPU decorative layer processing device for mobile phone back cover according to claim 1, it is characterized in that: The movable block (7) is slidably connected to the rectangular frame (3), one end of the reverse screw (6) is rotationally connected to the rectangular frame (3), and the thread directions of the forward screw (5) and the reverse screw (6) are opposite.
5. The device for processing TPU decorative layer of mobile phone back cover based on IML process according to claim 1, characterized in that: The elastic connection mechanism (8) comprises a fixed sleeve (81) fixed to the bottom of the movable block (7), a spring (82) is fixedly connected inside the fixed sleeve (81), a movable shaft (83) is fixedly connected to the bottom of the spring (82), and the bottom of the movable shaft (83) is fixedly connected to the rectangular bracket (9).
6. The device for processing TPU decorative layer of mobile phone back cover based on IML process according to claim 1, characterized in that: The conveyor belt (1) is provided with a negative pressure adsorption device (16), a TPU layer (17) is provided on the top of the negative pressure adsorption device (16), and a decorative layer (18) is connected to the back of the TPU layer (17).