Molding Press and Method for Preparing the Rear Cover of Consumer Electronics to Improve the Automatic Demolding Efficiency of Products

Abstract

The present invention relates to the technical field of molding presses, specifically a molding press and method for preparing consumer electronic back covers to improve the automatic demolding efficiency of products, mainly used for molding glass fiber mobile phone back covers, including: a pressure relief port provided on the lower mold, and the pressure relief port is connected to a pump pressure assembly provided on the side of the lower mold; a telescopic assembly connected to the upper mold, and the telescopic assembly cooperates with a first convex shaft connecting the pump pressure assembly, and can drive the pump pressure assembly to act to draw external air into the pump pressure assembly when the upper mold moves upward; a driving member installed on the bracket, and the driving member cooperates with the telescopic assembly, and can separate the telescopic assembly from the first convex shaft after the upper mold rises to a predetermined height, and make the pump pressure assembly act to compress and pump external air to the pressure relief port, facilitating the separation of the molded material from the mold.

Description

Technical Field

[0001] The present invention relates to the technical field of molding presses, and particularly to a molding press and method for preparing a consumer electronics back cover that improve the automatic demolding efficiency of products. Background Technique

[0002] Molding presses are often used to process and manufacture various components, component housings, and packaging boxes, etc., and are widely used in fields such as automobiles, electronics, machinery, and medical treatment.

[0003] In the field of electronics, for the outer casings of current consumer electronic products, such as the 3D molding of the back covers of 5G tablets and 5G mobile phones, semi-cured sheets of epoxy glass fiber are stacked in a suitable structure and release films are placed on the top and bottom, and then they are put into a mold for hot pressing. However, the curing speed of the epoxy glass fiber semi-cured sheet is relatively slow, resulting in a relatively low molding efficiency during the molding process. Therefore, in the industry, a thermoplastic epoxy glass fiber board is selected and put into the mold for rapid thermoplastic molding to improve the molding efficiency.

[0004] During the operation of the molding press, in order to make the thermoplastic epoxy glass fiber board material better molded, operations such as heating and vacuum pumping are involved. Although these operations can make the thermoplastic epoxy glass fiber board material better molded, they also indirectly lead to the problem that it may be difficult to separate the molded hot-pressed material from the mold. Currently, when demolding and discharging, by allowing the hot-pressed molded part to fully cool and cure, and then using methods such as negative pressure adsorption and mechanical grasping to take out the hot-pressed molded part. During the taking-out process, there is a certain adhesion force and frictional force between the hot-pressed molded part and the mold, and when taking out the hot-pressed molded part by the above method, the hot-pressed molded part is subjected to local stress, which easily causes the hot-pressed molded part to deform or even crack during the process of pulling the hot-pressed molded part. Summary of the Invention

[0005] The purpose of the present invention is to provide a molding press and method for preparing a consumer electronics back cover that improve the automatic demolding efficiency of products, so as to solve the problems raised in the above background technique.

[0006] To achieve the above object, the present invention provides the following technical solutions: A mold press for preparing a consumer electronics back cover that improves the automatic mold ejection efficiency of products, including: a bracket, on which an upper mold and a lower mold are provided, and the upper mold is connected to a hydraulic cylinder provided on the bracket; further including: a pressure relief port provided on the lower mold, and the pressure relief port is connected to a pump pressure component provided on the side of the lower mold; a telescopic component connected to the upper mold, and the telescopic component cooperates with a first convex shaft connecting the pump pressure component, and can drive the pump pressure component to act to pump external air into the pump pressure component when the upper mold moves upward; a driving member installed on the bracket, and the driving member cooperates with the telescopic component, and can separate the telescopic component from the first convex shaft after the upper mold rises to a predetermined height, and make the pump pressure component act to compress and pump external air to the pressure relief port.

[0007] As a further solution of the present invention: The pump pressure component includes a pump cylinder body fixedly installed on the side of the lower mold and with its central axis arranged in the vertical direction of the space. Two groups of one-way valves with opposite conduction directions are provided on the pump cylinder body. One group of the one-way valves is connected to a connector provided on the lower mold through a conduit, and the connector is in communication with the pressure relief port; the pump pressure component further includes an energy storage structure provided in the pump cylinder body and connected to the first convex shaft. When the first convex shaft moves upward, it can drive the energy storage structure to store energy and pump external air into the pump cylinder body.

[0008] As a further solution of the present invention: The energy storage structure includes a piston hermetically and slidably installed in the pump cylinder body. A connecting shaft passing through the pump cylinder body is connected to the piston. A first spring is sleeved on the connecting shaft. One end of the first spring is connected to the piston, and the other end is connected to the inner wall of the pump cylinder body; the end of the connecting shaft away from the piston is rotatably connected to the first convex shaft.

[0009] As a further solution of the present invention: The telescopic component includes a guiding member fixedly connected to the upper mold. A horizontal shaft is slidably installed on the guiding member. A first inclined surface for rolling cooperation with the first convex shaft is formed at one end of the horizontal shaft, and the other end is connected to the guiding member through a second spring; a second convex shaft is also rotatably installed on the horizontal shaft. Two groups of third inclined surfaces provided on the driving member cooperate with the second convex shaft, and can separate the horizontal shaft from the first convex shaft when the horizontal shaft performs a horizontal reciprocating motion once.

[0010] As a further solution of the present invention: it further includes: a contact member, horizontally arranged on the side of the lower mold and adapted to the groove 401 on the side of the lower mold, the contact member is connected to the support structure arranged on the lower mold, and a third convex shaft is rotatably installed on the support structure; a telescopic member, horizontally arranged and slidably installed on the lower mold, the telescopic member is in rolling cooperation with the third convex shaft, and a fourth convex shaft is rotatably installed on the telescopic member; a side plate, connecting the connecting shaft, a guiding groove is formed on the side plate, and the fourth convex shaft is in rolling cooperation with the guiding groove, so that after the upper mold and the lower mold are separated, the telescopic member and the third convex shaft can be separated.

[0011] As a further solution of the present invention: the support structure includes a hysteresis sleeve fixedly installed on the lower mold and with an opening arranged along the vertical direction of the space, a telescopic shaft fixedly connected to the contact member is slidably installed in the hysteresis sleeve, a limiting ring is arranged on the telescopic shaft, and a third spring is sleeved on the telescopic shaft, one end of the third spring is connected to the limiting ring, and the other end is connected to the inner wall of the hysteresis sleeve; the telescopic shaft is rotatably connected to the third convex shaft.

[0012] As a further solution of the present invention: the telescopic member includes a follower sleeve plate arranged on the lower mold along the horizontal direction of the space, the inside of the follower sleeve plate is a hollow structure, and a telescopic plate rotatably connected to the fourth convex shaft is slidably installed in the follower sleeve plate, one end of the telescopic plate far away from the follower sleeve plate forms a fourth inclined surface, and the fourth inclined surface is in rolling cooperation with the third convex shaft; the telescopic member further includes an elastic limiting structure arranged between the follower sleeve plate and the telescopic plate.

[0013] As a further solution of the present invention: the elastic limiting structure includes a fourth spring arranged in the follower sleeve plate, one end of the fourth spring is connected to the follower sleeve plate, and the other end is connected to the telescopic plate; a limiting groove is further arranged on the side wall of the follower sleeve plate, and a limiting part arranged on the telescopic plate can slide in the limiting groove.

[0014] As a further solution of the present invention: the guiding groove includes an inclined groove arranged on the side plate, and both ends of the inclined groove are connected to a first vertical groove and a second vertical groove arranged on the side plate.

[0015] Using the mold press for preparing a consumer electronics rear cover that improves the automatic demolding efficiency of products to prepare a consumer electronics rear cover, the method includes the following steps:

[0016] Step 1: Place the material to be hot-pressed on the lower mold, and then control the upper mold to move towards the lower mold until the upper mold and the lower mold are in contact. At this time, the contact member is in contact with the upper mold, and at the same time, the third convex shaft is locked by the telescopic member;

[0017] Step 2: Under the cooperation of the upper mold and the lower mold, the material to be hot-pressed is softened and then vacuumed to form a shape.

[0018] Step 3: The upper mold moves upward and drives the pump pressure assembly to draw external air into the pump pressure assembly.

[0019] Step 4: After the pump pressure assembly moves a certain distance, the guiding groove cooperates with the fourth convex shaft, so that the telescopic member and the third convex shaft are reset. At this time, the supporting structure drives the abutting member to move upward to lift the corners of the formed material.

[0020] Step 5: The upper mold continues to move to the end of the stroke. At this time, the driving member cooperates with the telescopic assembly to separate the telescopic assembly from the first convex shaft. At this time, the pump pressure assembly compresses the air and injects the compressed air into the pressure relief port, and uses the pressure to separate the formed material from the lower mold.

[0021] The material to be hot-pressed is a thermoplastic epoxy fiberglass board material.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: By providing the abutting member, the telescopic member and the side plate, when a high pressure is generated between the hot-pressed forming part and the lower mold, the abutting member can drive the two sides of the hot-pressed forming part to move upward, so that when a high pressure is generated between the hot-pressed forming part and the lower mold, the abutting member can act on the two sides of the hot-pressed forming part to assist the separation of the hot-pressed forming part from the lower mold, avoiding deformation, cracking and other phenomena on the side of the hot-pressed forming part, ensuring the smooth separation between the hot-pressed forming part and the lower mold, and after separation, the abutting member has the effect of lifting the hot-pressed forming part, so that when taking the hot-pressed forming part, it is not necessary to touch the lower mold, avoiding being scalded by the high temperature on the lower mold; By providing the pressure relief port, the pump pressure assembly, the telescopic assembly and the driving member, after hot-pressing and forming, the upper mold can move away from the lower mold, so that the natural wind from the outside can act on the hot-pressed forming part to assist its cooling and shaping, so that when a high pressure is generated between the hot-pressed forming part and the lower mold, the hot-pressed forming part can be fully cooled and solidified, avoiding local deformation of the hot-pressed forming part when the high pressure forces the hot-pressed forming part to separate from the lower mold, and when the upper mold moves to a predetermined height, the piston compresses the air in the pump cylinder body, so that a positive pressure is formed between the hot-pressed forming part and the lower mold, and under the action of the pressure, the hot-pressed forming part can be better separated from the lower mold, thereby effectively reducing the difficulty of taking out the hot-pressed forming part after hot-pressing and forming. Description of the Drawings

[0023] Figure 1 A schematic structural diagram of an embodiment of a mold press for preparing a consumer electronics back cover to improve the automatic demolding efficiency of products;

[0024] Figure 2Schematic diagram of the structure of a mold press for preparing a consumer electronics back cover from another angle in an embodiment for improving the automatic mold ejection efficiency of a product;

[0025] Figure 3 Schematic diagram of the structure of the lower mold in an embodiment of a mold press for preparing a consumer electronics back cover for improving the automatic mold ejection efficiency of a product;

[0026] Figure 4 For Figure 3 Enlarged view of the structure at A in;

[0027] Figure 5 Schematic diagram of the structure of the pump pressure component in an embodiment of a mold press for preparing a consumer electronics back cover for improving the automatic mold ejection efficiency of a product;

[0028] Figure 6 Exploded view of the structure of the support structure in an embodiment of a mold press for preparing a consumer electronics back cover for improving the automatic mold ejection efficiency of a product;

[0029] Figure 7 Schematic diagram of the structure of the telescopic rod member and the side plate in an embodiment of a mold press for preparing a consumer electronics back cover for improving the automatic mold ejection efficiency of a product;

[0030] Figure 8 Exploded view of the structure of the telescopic rod member in an embodiment of a mold press for preparing a consumer electronics back cover for improving the automatic mold ejection efficiency of a product;

[0031] Figure 9 Schematic diagram of the structure of the telescopic assembly in an embodiment of a mold press for preparing a consumer electronics back cover for improving the automatic mold ejection efficiency of a product;

[0032] Figure 10 Schematic diagram of the relative positions of the first convex shaft and the first inclined surface, and the third convex shaft and the fourth inclined surface in an embodiment of a mold press for preparing a consumer electronics back cover for improving the automatic mold ejection efficiency of a product.

[0033] In the figure: 1. Bracket; 2. Hydraulic cylinder; 3. Upper die; 4. Lower die; 401. Groove; 5. Pump cylinder block; 6. First spring; 7. Connecting shaft; 8. Connector; 9. Piston; 10. Check valve; 11. Conduit; 12. Pressure relief port; 13. First camshaft; 14. Guide; 15. Cross shaft; 1501. First inclined surface; 16. Second spring; 17. Second camshaft; 18. Link plate; 19. Driving member; 1901. Third inclined surface; 20. Retention sleeve; 21. Third spring; 22. Telescopic shaft; 2201. Limit ring; 23. Contact member; 24. Third camshaft; 25. Telescopic plate; 2501. Fourth inclined surface; 2502. Limiting portion; 26. Fourth spring; 27. Follow-up sleeve plate; 2701. Limit groove; 28. Fourth camshaft; 29. Grooved pulley; 30. Guide member; 31. Side plate; 3101. First vertical groove; 3102. Inclined groove; 3103. Second vertical groove. Detailed implementation manner

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] In addition, an element in the present invention is referred to as being "fixed to" or "disposed on" another element, and it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0036] Please refer to Figures 1 to 10 , in the embodiment of the present invention, a mold press for preparing a consumer electronics rear cover that improves the automatic demolding efficiency of products. Among them, taking the mobile phone rear cover made of thermoplastic epoxy glass fiber board material as an example of the consumer electronics rear cover, the mold press includes: a bracket 1, a pressure relief port 12, a telescopic assembly, and a driving member 19.

[0037] The upper die 3 and the lower die 4 are arranged on the bracket 1, and the upper die 3 is connected to the hydraulic cylinder 2 arranged on the bracket 1; the pressure relief port 12 is arranged on the lower die 4, and the pressure relief port 12 is connected to the pump pressure assembly arranged on the side of the lower die 4; the pump pressure assembly includes a pump cylinder body 5 fixedly installed on the side of the lower die 4 and with its central axis arranged in the vertical direction of the space. Two groups of check valves 10 with opposite conduction directions are arranged on the pump cylinder body 5. One group of the check valves 10 is connected to a connector 8 arranged on the lower die 4 through a conduit 11, and the connector 8 is communicated with the pressure relief port 12; the pump pressure assembly further includes an energy storage structure arranged in the pump cylinder body 5 and connected to the first convex shaft 13. When the first convex shaft 13 moves upward, it can drive the energy storage structure to store energy and draw external air into the pump cylinder body 5; the energy storage structure includes a piston 9 slidably installed in the pump cylinder body 5 in a sealed manner. A connecting shaft 7 is connected to the piston 9 and penetrates through the pump cylinder body 5. A first spring 6 is sleeved on the connecting shaft 7. One end of the first spring 6 is connected to the piston 9, and the other end is connected to the inner wall of the pump cylinder body 5; the end of the connecting shaft 7 far from the piston 9 is rotatably connected to the first convex shaft 13.

[0038] During use, after the upper die 3 and the lower die 4 cooperate to achieve hot pressing and forming of the material, the upper die 3 will move upward. At this time, the telescopic assembly connected to the upper die 3 will move upward, and the telescopic assembly is in a state of abutting against the first convex shaft 13, so that the first convex shaft 13 can drive the connecting shaft 7 to move upward, and the piston 9 to move upward. At this time, negative pressure can be generated in the pump cylinder body 5, and external air can be drawn into the pump cylinder body 5. At the same time, the first spring 6 is compressed. When the upper die 3 rises to a predetermined height, the telescopic assembly can move horizontally under the action of the driving member 19 and separate from the first convex shaft 13. At this time, the first spring 6 releases its elastic potential energy, compresses the air in the pump cylinder body 5, and makes the compressed air enter the pressure relief port 12 through the conduit 11 until it moves between the lower die 4 and the hot-pressed formed part. At this time, under the action of the gradually increasing pressure, the hot-pressed formed part can generate a cavity that spreads around with the pressure relief port 12 as the center, so that the hot-pressed formed part can be separated from the lower die 4.

[0039] Further, during the process of the upper die 3 moving away from the lower die 4, external air can be drawn into the pump cylinder body 5. During this process, there is a certain gap between the upper die 3 and the lower die 4, and the natural wind generated by the external cooling device (fan) can flow through the upper part of the hot-pressed formed part, and assist in the cooling and forming of the hot-pressed formed part, so that when a high pressure is generated between the hot-pressed formed part and the lower die 4, the hot-pressed formed part can be fully cooled and solidified, and avoid local deformation of the hot-pressed formed part when it is separated from the lower die 4 under the high pressure.

[0040] Please refer to Figure 5 and Figure 9 For the process in which the upper die 3 moves upward to drive the first convex shaft 13 to move, the following settings can be referred to: The telescopic assembly is connected to the upper die 3, and the telescopic assembly cooperates with the first convex shaft 13 connecting the pump pressure assembly, and can drive the pump pressure assembly to act to pump external air into the pump pressure assembly when the upper die 3 moves upward; The driving member 19 is installed on the bracket 1 through the connecting plate 18, and the driving member 19 cooperates with the telescopic assembly, and can separate the telescopic assembly from the first convex shaft 13 after the upper die 3 rises to a predetermined height, and make the pump pressure assembly act to compress and pump the external air to the pressure relief port 12; The telescopic assembly includes a guide member 14 fixedly connected to the upper die 3, a horizontal shaft 15 is slidably installed on the guide member 14, one end of the horizontal shaft 15 is formed with a first inclined surface 1501 that rolls with the first convex shaft 13, and the other end is connected to the guide member 14 through a second spring 16; A second convex shaft 17 is also rotatably installed on the horizontal shaft 15, and two sets of third inclined surfaces 1901 provided on the driving member 19 cooperate with the second convex shaft 17, and can make the horizontal shaft 15 separate from the first convex shaft 13 when the horizontal shaft 15 performs a horizontal reciprocating motion once.

[0041] Define the initial state when the upper die 3 starts to separate from the lower die 4. At this time, the second spring 16 is in a natural state. At this time, the horizontal shaft 15 is below the first convex shaft 13. At the same time, in this state, it is in the state of performing a hot pressing action while the upper die 3 and the lower die 4 are in contact. When the hot pressing forming is completed, the upper die 3 moves away from the lower die 4. At this time, the horizontal shaft 15 can abut against the first convex shaft 13 to drive the first convex shaft 13 to move upward. At the same time, the first convex shaft 13 drives the piston 9 to move upward through the connecting shaft 7 to pump external air into the pump cylinder block 5 while compressing the first spring 6. When the upper die 3 moves to a predetermined height, the second convex shaft 17 on the horizontal shaft 15 can abut against the third inclined surface 1901 on the driving member 19, so that the horizontal shaft 15 can slide relative to the guide member 14, and the second spring 16 is stretched until after the horizontal shaft 15 separates from the first convex shaft 13, the first spring 6 can release elastic potential energy to drive the piston 9 to accelerate downward, so that a positive pressure is generated in the pump cylinder block 5 to compress air. At this time, the compressed air can enter between the hot pressing forming part and the lower die 4 through the conduit 11 and the pressure relief port 12, and use the pressure to separate the hot pressing forming part from the lower die 4.

[0042] When the thermoplastic epoxy fiberglass board material is placed on the lower mold 4, the upper mold 3 will move towards the lower mold 4. At this time, the horizontal shaft 15 will also move downward. When the upper mold 3 is about to fit with the lower mold 4, the first convex shaft 13 abuts against the first inclined surface 1501 on the horizontal shaft 15. During the process of the horizontal shaft 15 continuing to move downward, the horizontal shaft 15 will move relative to the guiding member 14 again and stretch the second spring 16 again. When the horizontal shaft 15 moves to the lower part of the first convex shaft 13, the second spring 16 can release elastic potential energy to reset the horizontal shaft 15. Thus, when the upper mold 3 moves upward again, the above steps can be repeated to achieve continuous processing. After the upper mold 3 moves to a predetermined height, a positive pressure can be formed between the hot-pressed forming part and the lower mold 4 to facilitate their separation.

[0043] Through the above settings, after hot pressing and forming, the upper mold 3 can move away from the lower mold 4, and the natural wind from the outside can act on the hot-pressed forming part to assist in its cooling and shaping. When a high pressure is generated between the hot-pressed forming part and the lower mold 4, the hot-pressed forming part can be fully cooled and solidified, avoiding local deformation of the hot-pressed forming part when it is separated from the lower mold 4 under high pressure. When the upper mold 3 moves to a predetermined height, the piston 9 compresses the air in the pump cylinder block 5 to form a positive pressure between the hot-pressed forming part and the lower mold 4. Under the action of the pressure, the hot-pressed forming part can be better separated from the lower mold 4, effectively reducing the difficulty of taking out the hot-pressed forming part after hot pressing and forming.

[0044] Please refer to Figure 4 、 Figure 6 A mold press for preparing a consumer electronics back cover that improves the automatic mold ejection efficiency of products further includes: an abutting member 23, a telescopic member, and a side plate 31.

[0045] The abutting member 23 is horizontally arranged on the side of the lower mold 4 and is adapted to the groove 401 on the side of the lower mold 4, that is, the lower mold 401 can be embedded in the groove 401. During use, when the upper mold 3 moves towards the lower mold 4, it can push the epoxy fiberglass material towards the lower mold 4. When the abutting member 23 enters the groove 401, the upper surface of the abutting member 23 is coplanar with the upper surface of the lower mold 4. The abutting member 23 is connected to a support structure arranged on the lower mold 4, and a third convex shaft 24 is rotatably installed on the support structure; the support structure includes a retention sleeve 20 fixedly installed on the lower mold 4 with an opening arranged along the vertical direction of the space. A telescopic shaft 22 fixedly connected to the abutting member 23 is slidably installed in the retention sleeve 20. A limit ring 2201 is arranged on the telescopic shaft 22, and a third spring 21 is sleeved on the telescopic shaft 22. One end of the third spring 21 is connected to the limit ring 2201, and the other end is connected to the inner wall of the retention sleeve 20; the telescopic shaft 22 is rotatably connected to the third convex shaft 24.

[0046] In the initial state, the third spring 21 is in a compressed state. At this time, the abutting member 23 is at the high point of the stroke. When the thermoplastic epoxy fiberglass board material is placed on the abutting member 23 and the upper mold 3 is in contact with the lower mold 4, the abutting member 23 can be located between the upper mold 3 and the lower mold 4. At this time, the abutting member 23 is at the lower part of the thermoplastic epoxy fiberglass board material. At the same time, in this state, the third spring 21 is further compressed, and the telescopic shaft 22 is locked by the telescopic member. After hot pressing is completed, when the upper mold 3 moves upward a certain distance, the telescopic member can be separated from the third convex shaft 24. At this time, the third spring 21 can release its elastic potential energy to push the abutting member 23 upward. At this time, the abutting member 23 can act on both sides of the hot-pressed forming part. At this time, the hot-pressed forming part may not be separated from the lower mold 4, but the hot-pressed forming part has a tendency to be separated from the lower mold 4 under the push of the abutting member 23. When a positive pressure is generated between the hot-pressed forming part and the lower mold 4, the acting force of the abutting member 23 on the hot-pressed forming part can assist in the separation of the hot-pressed forming part from the lower mold 4, which improves the separation success rate between the hot-pressed forming part and the lower mold 4 to a certain extent.

[0047] Among them, after the hot-pressed forming part is separated from the lower mold 4, the abutting member 23 can push the hot-pressed forming part upward, so that a certain gap is generated between the hot-pressed forming part and the lower mold 4, which is convenient for taking the hot-pressed forming part and avoiding scalding.

[0048] Please refer to Figure 4 、 Figure 6 、 Figures 7 to 8 、 Figure 10, Further, the telescopic member is horizontally arranged and slidably mounted on the lower mold 4. The telescopic member is in rolling cooperation with the third convex shaft 24, and a fourth convex shaft 28 is rotatably mounted on the telescopic member. Specifically, a grooved wheel 29 is rotatably mounted on the telescopic member, and the grooved wheel 29 is in rolling connection with a guide member 30 provided on the lower mold 4; the telescopic member includes a follower sleeve plate 27 horizontally arranged in the space on the lower mold 4 and fixedly connected to the guide member 30. The inside of the follower sleeve plate 27 is a hollow structure, and a telescopic plate 25 rotatably connected to the fourth convex shaft 28 is slidably mounted inside the follower sleeve plate 27. One end of the telescopic plate 25 away from the follower sleeve plate 27 forms a fourth inclined surface 2501, and the fourth inclined surface 2501 is in rolling cooperation with the third convex shaft 24; the telescopic member further includes an elastic limiting structure arranged between the follower sleeve plate 27 and the telescopic plate 25. The elastic limiting structure includes a fourth spring 26 arranged inside the follower sleeve plate 27. One end of the fourth spring 26 is connected to the follower sleeve plate 27, and the other end is connected to the telescopic plate 25; a limiting groove 2701 is further arranged on the side wall of the follower sleeve plate 27, and a limiting portion 2502 arranged on the telescopic plate 25 can slide in the limiting groove 2701; the side plate 31 is connected to the connecting shaft 7, and a guiding groove is formed on the side plate 31. The fourth convex shaft 28 is in rolling connection with the guiding groove, and can separate the telescopic member from the third convex shaft 24 after the upper mold 3 and the lower mold 4 are separated. Specifically, the guiding groove includes an inclined groove 3102 arranged on the side plate 31, and both ends of the inclined groove 3102 are connected to a first vertical groove 3101 and a second vertical groove 3103 arranged on the side plate 31.

[0049] In the initial state, the fourth spring 26 is in a compressed state. At this time, the limiting portion 2502 is in a state of abutting against one side of the limiting groove 2701. At the same time, the third convex shaft 24 is located below the telescopic plate 25, and the upper mold 3 and the lower mold 4 are in a fitting state. When the upper mold 3 moves upward and drives the connecting shaft 7 to move upward, the side plate 31 connected thereto will also move upward, and the fourth convex shaft 28 will move along the first vertical groove 3101. At this time, the follower sleeve plate 27 and the telescopic plate 25 are stationary relative to the third convex shaft 24. During this process, a certain gap can be generated between the upper mold 3 and the lower mold 4, so that the natural wind outside can act on the hot pressing forming part, enabling the hot pressing forming part to cool and solidify quickly, and preventing the abutting member 23 from acting on the side of the hot pressing forming part. When the hot pressing forming part is still in a softened state, the acting force of the abutting member 23 on the side of the hot pressing forming part cannot be transmitted to the middle of the hot pressing forming part, resulting in the loss of the auxiliary separation effect.

[0050] As the side plate 31 continues to rise, the fourth convex shaft 28 will move along the inclined groove 3102. At this time, the inclined groove 3102 is in rolling cooperation with the fourth convex shaft 28, which can drive the follower sleeve plate 27 and the telescopic plate 25 to move along the length direction of the guide member 30. When the telescopic plate 25 is separated from the third convex shaft 24, the telescopic shaft 22 is unlocked. At this time, the third spring 21 releases elastic potential energy, causing the abutting member 23 to move upward to jack up both sides of the hot pressing forming part.

[0051] Further, similarly, when the hot pressing action is performed again, the upper die 3 can reset the abutting member 23 by acting on the thermoplastic epoxy fiberglass board material. When the third convex shaft 24 acts on the fourth inclined surface 2501, the telescopic plate 25 performs a telescopic action and resets. When the upper die 3 moves upward again, the abutting member 23 can act on both sides of the hot pressing forming part again.

[0052] Through the above settings, when a high pressure is generated between the hot pressing forming part and the lower die 4, the abutting member 23 can drive both sides of the hot pressing forming part to move upward, so that when a high pressure is generated between the hot pressing forming part and the lower die 4, the abutting member 23 can assist in separating the hot pressing forming part from the lower die 4 by acting on both sides of the hot pressing forming part, ensuring the smooth separation between the hot pressing forming part and the lower die 4, avoiding phenomena such as deformation and cracking on the side of the hot pressing forming part. And after separation, the abutting member 23 has the effect of jacking up the hot pressing forming part, so that when taking the hot pressing forming part, it is not necessary to touch the lower die 4, avoiding being scalded by the high temperature on the lower die 4.

[0053] As an embodiment of the present invention, a method for preparing a consumer electronics back cover using the mold press for improving the automatic demolding efficiency of products is also proposed, including the following steps:

[0054] Step 1: Place the thermoplastic epoxy fiberglass board material on the lower die 4, and then control the upper die 3 to move towards the lower die 4 until the upper die 3 is in contact with the lower die 4. At this time, the abutting member 23 is in contact with the upper die 3, and at the same time, the third convex shaft 24 is locked by the telescopic member;

[0055] Step 2: Under the cooperation of the upper die 3 and the lower die 4, the thermoplastic epoxy fiberglass board material softens and then is formed by vacuum pumping;

[0056] Step 3: The upper die 3 moves upward and drives the pump pressure component to pump external air into the pump pressure component;

[0057] Step 4: After the pump pressure component moves a certain distance, the guide groove cooperates with the fourth convex shaft 28, so that the telescopic member and the third convex shaft 24 are reset. At this time, the support structure drives the abutting member 23 to move upward to jack up the corners of the formed material;

[0058] Step Five: The upper mold 3 continues to move to the end of the stroke. At this time, the driving member 19 cooperates with the telescopic assembly to separate the telescopic assembly from the first convex shaft 13. At this time, the pump pressure assembly compresses the air and injects the compressed air into the pressure relief port 12, and uses the pressure to separate the formed material from the lower mold 4.

[0059] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0060] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A mold press for preparing a consumer electronics back cover to improve the automatic demolding efficiency of products, comprising: A bracket, on which an upper mold and a lower mold are arranged, and the upper mold is connected to a hydraulic cylinder arranged on the bracket; it is characterized in that it further includes: a contact member, horizontally arranged on the side of the lower mold and adapted to a groove on the side of the lower mold, the contact member is connected to a support structure arranged on the lower mold, and a third convex shaft is rotatably installed on the support structure; a telescopic member, horizontally arranged and slidably installed on the lower mold, the telescopic member is in rolling cooperation with the third convex shaft, and a fourth convex shaft is rotatably installed on the telescopic member; a side plate, connected to the lower mold, a guiding groove is formed on the side plate, and the fourth convex shaft is in rolling connection with the guiding groove, and can separate the telescopic member from the third convex shaft after the upper mold and the lower mold are separated; the support structure includes a retention sleeve fixedly installed on the lower mold and with an opening arranged along the vertical direction of the space, a telescopic shaft perpendicular to the contact member is slidably installed in the retention sleeve, a limit ring is arranged on the telescopic shaft, and a third spring is sleeved on the telescopic shaft, one end of the third spring is connected to the limit ring, and the other end is connected to the inner wall of the retention sleeve; the telescopic shaft is rotatably connected to the third convex shaft; the telescopic member includes a follower plate arranged horizontally on the lower mold, the inside of the follower plate is a hollow structure, and a telescopic plate rotatably connected to the fourth convex shaft is slidably installed in the follower plate, a fourth inclined surface is formed at one end of the telescopic plate away from the follower plate, and the fourth inclined surface is in rolling cooperation with the third convex shaft; the telescopic member further includes an elastic limiting structure arranged between the follower plate and the telescopic plate; the elastic limiting structure includes a fourth spring arranged in the follower plate, one end of the fourth spring is connected to the follower plate, and the other end is connected to the telescopic plate; a limiting groove is further arranged on the side wall of the follower plate, and a limiting portion arranged on the telescopic plate can slide in the limiting groove; the guiding groove includes an inclined groove arranged on the side plate, and two ends of the inclined groove are connected to a first vertical groove and a second vertical groove arranged on the side plate.

2. The mold press for preparing a consumer electronics back cover for improving the automatic demolding efficiency of a product according to claim 1, characterized in that, It further includes: A pressure relief port, arranged on the lower mold, and the pressure relief port is connected to a pump pressure assembly arranged on the side of the lower mold; a telescopic assembly, connected to the upper mold, the telescopic assembly is in cooperation with a first convex shaft connected to the pump pressure assembly, and can drive the pump pressure assembly to act to draw external air into the pump pressure assembly when the upper mold moves upward; a driving member, installed on the bracket, the driving member is in cooperation with the telescopic assembly, and can separate the telescopic assembly from the first convex shaft and make the pump pressure assembly act to compress and pump the external air to the pressure relief port after the upper mold rises to a predetermined height.

3. The die press for preparing the consumer electronics rear cover for improving the automatic demolding efficiency of the product according to claim 2, wherein The pump pressure assembly includes a pump cylinder body fixedly installed on the side of the lower mold and with a central axis arranged along the vertical direction of the space, two groups of one-way valves with opposite conduction directions are arranged on the pump cylinder body, and one group of one-way valves is connected to a connector arranged on the lower mold through a conduit, and the connector is in communication with the pressure relief port; the pump pressure assembly further includes an energy storage structure arranged in the pump cylinder body and connected to the first convex shaft, and when the first convex shaft moves upward, it can drive the energy storage structure to store energy and draw external air into the pump cylinder body.

4. The die press for preparing the consumer electronics rear cover for improving the automatic demolding efficiency of the product according to claim 3, wherein, The energy storage structure includes a piston sealed and slidably installed in the pump cylinder body, the piston is connected to a connecting shaft arranged through the pump cylinder body, the connecting shaft is connected to the side plate, and a first spring is sleeved on the connecting shaft, one end of the first spring is connected to the piston, and the other end is connected to the inner wall of the pump cylinder body; the end of the connecting shaft away from the piston is rotatably connected to the first cam shaft.

5. The die press for preparing a consumer electronics back cover for improving the automatic demolding efficiency of a product according to claim 2, wherein The telescopic assembly includes a guide member fixedly connected to the upper mold, a horizontal axis is slidably installed on the guide member, one end of the horizontal axis is formed with a first inclined surface that rolls with the first cam, and the other end is connected to the guide member through a second spring; a second cam is also rotatably installed on the horizontal axis, and two groups of third inclined surfaces arranged on the driving member cooperate with the second cam, so that the horizontal axis can be separated from the first cam when performing a horizontal reciprocating motion.

6. A method for manufacturing a consumer electronics back cover using the molding machine according to any one of claims 2 to 5, characterized in that, The following steps are involved: Step 1: placing the material to be hot-pressed on the lower mold, and then controlling the upper mold to move toward the lower mold until the upper mold and the lower mold are in contact with each other, at which time the abutment member and the upper mold are in contact with each other, and the third convex shaft is locked by the telescopic rod; Step 2: Under the cooperation of the upper mold and the lower mold, the hot pressed material is softened and then vacuumed to form; Step 3: The upper mold moves upward and drives the pump assembly to draw external air into the pump assembly; Step 4: After the pumping assembly moves a certain distance, the guide groove cooperates with the fourth cam shaft to reset the telescopic rod and the third cam shaft. At this time, the supporting structure drives the abutment member to move upward to lift the corners of the formed material; Step 5: The upper mold continues to move to the end of the stroke. At this time, the driving member cooperates with the telescopic assembly to separate the telescopic assembly from the first cam. At this time, the pump pressure assembly compresses the air and injects the compressed air into the pressure relief port, using pressure to separate the molded material from the lower mold.

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