Molding press and method for manufacturing consumer electronic rear cover and capable of improving automatic demolding efficiency of product

Abstract

The invention relates to the technical field of molding presses, in particular to a molding press and method for manufacturing consumer electronic rear covers and capable of improving the automatic demolding efficiency of products, the molding press is mainly used for carrying out compression molding on glass fiber mobile phone rear covers, and the molding press comprises a pressure relief opening formed in a lower mold and connected with a pump pressure assembly arranged on the side portion of the lower mold; the telescopic assembly is connected with the upper mold, the telescopic assembly is matched with a first convex shaft connected with the pump pressure assembly, and when the upper mold moves upwards, the telescopic assembly can drive the pump pressure assembly to act so as to suck external air into the pump pressure assembly; and the driving piece is installed on the support, the driving piece is matched with the telescopic assembly, and after the upper body of the upper mold reaches the preset height, the telescopic assembly can be separated from the first protruding shaft, the pumping assembly is made to act, so that external air is compressed and pumped to the pressure relief opening, and a formed material is conveniently separated from the mold.

Description

Technical Field

[0001] The present invention relates to the technical field of molding machines, and in particular to a molding machine and method for preparing a back cover of consumer electronics, which can improve the efficiency of automatic demoulding of products. Background Art

[0002] Molding machines are often used to process and manufacture various parts, component shells and packaging boxes, and are widely used in the automotive, electronics, machinery, medical and other fields.

[0003] In the electronics field, the shells of current consumer electronic products, such as 5G tablets and 5G mobile phone back covers, are 3D molded by using epoxy glass fiber prepregs that are appropriately stacked and combined with release films placed on top and bottom, and then placed in a mold for hot pressing. However, the curing speed of epoxy glass fiber prepregs is relatively slow, resulting in relatively low molding efficiency during the molding process. Therefore, the industry will use thermoplastic epoxy glass fiber boards to be placed in the mold for rapid thermoplastic molding, thereby improving molding efficiency.

[0004] During the operation of the molding machine, in order to better mold the thermoplastic epoxy glass fiber board material, heating, vacuuming and other operations are involved. Although these operations can better mold the thermoplastic epoxy glass fiber board material, they also indirectly lead to the problem that there may be difficulty in separating the hot-pressed material and the mold after molding. When the mold is separated and the material is discharged, the hot-pressed molded part is fully cooled and solidified, and then the hot-pressed molded part is taken out by negative pressure adsorption, mechanical grasping and the like. During the removal process, there is a certain adhesion and friction between the hot-pressed molded part and the mold. When the hot-pressed molded part is taken out by the above method, the hot-pressed molded part is locally stressed, which makes it easy to cause 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 object of the present invention is to provide a molding machine and method for preparing a back cover of consumer electronics that improves the efficiency of automatic demolding of products, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a molding machine for preparing back covers of consumer electronics that improves the efficiency of automatic demolding 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; and further comprising: a pressure relief port, arranged on the lower mold, and the pressure relief port is connected to a pump pressure component arranged on the side of the lower mold; a telescopic component, connected to the upper mold, the telescopic component cooperates with a first convex shaft connected to the pump pressure component, and can drive the pump pressure component to operate to draw external air into the pump pressure component when the upper mold moves upward; a driving member, installed on the bracket, the driving member cooperates with the telescopic component, and can separate the telescopic component from the first convex shaft and operate the pump pressure component after the upper mold is raised to a predetermined height, so as to compress the external air and pump it to the pressure relief port.

[0007] As a further solution of the present invention: the pumping assembly includes a pump cylinder body fixedly mounted on the side of the lower mold and with the central axis arranged in the vertical direction of the space, and two groups of one-way valves with opposite conduction directions are arranged on the pump cylinder body, one group of the one-way valves is connected to a connector arranged on the lower mold through a conduit, and the connector is connected to the pressure relief port; the pumping assembly also includes an energy storage structure arranged in the pump cylinder body and connected to the first cam shaft, and when the first cam shaft moves upward, the energy storage structure can be driven to store energy and draw external air into the pump cylinder body.

[0008] As a further solution of the present invention: 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, 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.

[0009] As a further solution of the present invention: 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 shaft, and the other end is connected to the guide member through a second spring; a second cam shaft 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 shaft, so that the horizontal axis can be separated from the first cam shaft when the horizontal axis performs a lateral reciprocating motion.

[0010] As a further solution of the present invention: it also includes: an abutment member, which is horizontally arranged on the side of the lower mold and adapted to the groove 401 on the side of the lower mold, the abutment member is connected to the supporting structure arranged on the lower mold, and a third cam is rotatably installed on the supporting structure; a telescopic rod member, which is horizontally arranged and slidably installed on the lower mold, the telescopic rod member is rollingly matched with the third cam, and a fourth cam is rotatably installed on the telescopic rod member; a side plate, which is connected to the connecting shaft, and a guide groove is formed on the side plate, and the fourth cam is rollingly matched with the guide groove, so that the telescopic rod member can be separated from the third cam after the upper mold is separated from the lower mold.

[0011] As a further solution of the present invention: the supporting structure includes a hysteresis sleeve which is fixedly mounted on the lower mold and whose opening is arranged along the vertical direction of the space, a telescopic shaft which is fixedly connected to the abutment member is slidably mounted 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 cam shaft.

[0012] As a further solution of the present invention: the telescopic rod includes a follower sleeve plate arranged on the lower mold along the horizontal direction of the space, the interior of the follower sleeve plate is a hollow structure, and a telescopic plate rotatably connected to the fourth cam shaft is slidably installed in the follower sleeve plate, and a fourth inclined surface is formed at one end of the telescopic plate away from the follower sleeve plate, and the fourth inclined surface is rollingly engaged with the third cam shaft; the telescopic rod also 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, one end of the fourth spring is connected to the follower sleeve, and the other end is connected to the telescopic plate; a limiting groove is also arranged on the side wall of the follower sleeve, and the limiting part arranged on the telescopic plate can slide in the limiting groove.

[0014] As a further solution of the present invention: the guide 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] The method for preparing a back cover of consumer electronics using the molding machine for preparing a back cover of consumer electronics that improves the automatic demoulding efficiency of products comprises the following steps: 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.

[0016] The material to be hot-pressed is a thermoplastic epoxy glass fiber board material.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: by providing the abutment, telescopic rod and side plate, when high pressure is generated between the hot-pressed part and the lower mold, the abutment can drive the two sides of the hot-pressed part to move upward, so that when high pressure is generated between the hot-pressed part and the lower mold, the abutment can assist the hot-pressed part to separate from the lower mold by acting on the two sides of the hot-pressed part, thereby avoiding deformation, cracking and the like on the side of the hot-pressed part, ensuring smooth separation between the hot-pressed part and the lower mold, and after separation, the abutment has the effect of lifting the hot-pressed part, so that when taking the hot-pressed part, there is no need to touch the lower mold, avoiding burns from the high temperature on the lower mold; by providing The pressure relief port, pump pressure component, telescopic component and driving component are arranged so that after hot pressing 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 part to assist its cooling and shaping, so that when high pressure is generated between the hot pressed part and the lower mold, the hot pressed part can be fully cooled and solidified, avoiding local deformation of the hot pressed part when the high pressure forces the hot pressed part to be separated from the lower mold, and when the upper mold moves to a predetermined height, the piston compresses the air in the pump cylinder body to form a positive pressure between the hot pressed part and the lower mold, and under the action of pressure, the hot pressed part can be better separated from the lower mold, thereby effectively reducing the difficulty of removing the hot pressed part after hot pressing forming. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of an embodiment of a molding machine for preparing a back cover of consumer electronics for improving the efficiency of automatic demoulding of products; Figure 2 A schematic structural diagram of another angle of an embodiment of a molding machine for preparing a back cover of consumer electronics to improve the efficiency of automatic demoulding of products; Figure 3A schematic diagram of the structure of the lower mold in one embodiment of a molding machine for preparing a back cover of consumer electronics to improve the efficiency of automatic demoulding of products; Figure 4 for Figure 3 A magnified view of the structure at center A; Figure 5 A schematic diagram of the structure of a pumping assembly in one embodiment of a molding machine for preparing a back cover of consumer electronics to improve the efficiency of automatic demoulding of products; Figure 6 An exploded view of the structure of the support structure in one embodiment of a molding machine for preparing a back cover of consumer electronics to improve the efficiency of automatic demoulding of products; Figure 7 A schematic diagram of the structure of the telescopic rod and the side plate in one embodiment of a molding machine for preparing a back cover of consumer electronics to improve the efficiency of automatic demoulding of products; Figure 8 An exploded view of the structure of the telescopic rod in one embodiment of a molding machine for preparing a back cover of consumer electronics to improve the efficiency of automatic demoulding of products; Fig. 9 A schematic diagram of the structure of a telescopic component in one embodiment of a molding machine for preparing a back cover of consumer electronics to improve the efficiency of automatic demoulding of products; Fig.10 A schematic diagram of the relative positions of the first convex axis and the first inclined surface, and the third convex axis and the fourth inclined surface in an embodiment of a molding machine for preparing a back cover of consumer electronics to improve the efficiency of automatic demolding of products.

[0019] In the figure: 1, bracket; 2, hydraulic cylinder; 3, upper mold; 4, lower mold; 401, groove; 5, pump cylinder body; 6, first spring; 7, connecting shaft; 8, connector; 9, piston; 10, one-way valve; 11, guide tube; 12, pressure relief port; 13, first convex shaft; 14, guide member; 15, horizontal axis; 1501, first inclined surface; 16, second spring; 17, second convex shaft; 18, connecting plate; 19, driving member; 1901, third inclined surface; 20. Delay sleeve; 21. Third spring; 22. Telescopic shaft; 2201. Limiting ring; 23. Abutment member; 24. Third cam shaft; 25. Telescopic plate; 2501. Fourth inclined surface; 2502. Limiting portion; 26. Fourth spring; 27. Follower sleeve; 2701. Limiting groove; 28. Fourth cam shaft; 29. ​​Groove wheel; 30. Guide member; 31. Side plate; 3101. First vertical groove; 3102. Inclined groove; 3103. Second vertical groove. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0022] See also Figure 1 to Figure 10 In an embodiment of the present invention, a molding machine for preparing a consumer electronic back cover is provided to improve the efficiency of automatic demolding of products, wherein the consumer electronic back cover takes a mobile phone back cover made of thermoplastic epoxy glass fiber board material as an example, and the molding machine includes: a bracket 1, a pressure relief port 12, a telescopic component and a driving member 19.

[0023] An upper mold 3 and a lower mold 4 are arranged on the bracket 1, and the upper mold 3 is connected to the hydraulic cylinder 2 arranged on the bracket 1; the pressure relief port 12 is arranged on the lower mold 4, and the pressure relief port 12 is connected to a pump pressure assembly arranged on the side of the lower mold 4; the pump pressure assembly includes a pump cylinder body 5 fixedly mounted on the side of the lower mold 4 and with the central axis arranged in the vertical direction of the space, and two groups of one-way valves 10 with opposite conduction directions are arranged on the pump cylinder body 5, one of which is connected to a connector 8 arranged on the lower mold 4 through a conduit 11, and the connector 8 is conducted with the pressure relief port 12; the pump pressure assembly It also includes an energy storage structure arranged in the pump cylinder body 5 and connected to the first cam 13. When the first cam 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 that is sealingly and slidably installed in the pump cylinder body 5, and the piston 9 is connected to a connecting shaft 7 that passes through the pump cylinder body 5. The connecting shaft 7 is sleeved with a first spring 6, 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 away from the piston 9 is rotatably connected to the first cam 13.

[0024] When in use, after the upper mold 3 cooperates with the lower mold 4 to realize hot pressing forming of the material, the upper mold 3 will move upward. At this time, the telescopic assembly connected to the upper mold 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 moves upward. At this time, negative pressure can be generated in the pump cylinder body 5, and external air is drawn into the pump cylinder body 5. At the same time, the first spring 6 is compressed. When the upper mold 3 rises to a predetermined height, the telescopic assembly can move laterally under the action of the driving member 19 and separate from the first convex shaft 13. At this time, the first spring 6 releases elastic potential energy, compresses the air in the pump cylinder body 5, and allows the compressed air to enter the pressure relief port 12 through the conduit 11 until it moves between the lower mold 4 and the hot pressing molded part. At this time, under the action of the gradually increasing pressure, the hot pressing molded part can generate a cavity that spreads to the surroundings with the pressure relief port 12 as the center, thereby separating the hot pressing molded part from the lower mold 4.

[0025] Furthermore, in the process of the upper mold 3 moving away from the lower mold 4, external air can be drawn into the pump cylinder 5. During this process, there is a certain gap between the upper mold 3 and the lower mold 4. The natural wind generated by the external cooling device (fan) can flow through the upper part of the hot-pressed part, thereby assisting the cooling and forming of the hot-pressed part. When high pressure is generated between the hot-pressed part and the lower mold 4, the hot-pressed part can be fully cooled and solidified, thereby avoiding local deformation of the hot-pressed part when the hot-pressed part is separated from the lower mold 4 under high pressure.

[0026] See also Figure 5 , Fig. 9For the process of the upper mold 3 moving upward and driving the first convex shaft 13 to move, the following settings can be referred to: the telescopic component is connected to the upper mold 3, and the telescopic component cooperates with the first convex shaft 13 connected to the pump pressure component, so that when the upper mold 3 moves upward, the pump pressure component can be driven to operate to draw external air into the pump pressure component; the driving member 19 is installed on the bracket 1 through the connecting plate 18, and the driving member 19 cooperates with the telescopic component, so that after the upper mold 3 rises to a predetermined height, the telescopic component can be separated from the first convex shaft 13, and the pump pressure component can be operated to draw external air into the pump pressure component. The compression is carried out and the pump is directed to the pressure relief port 12; the telescopic assembly comprises a guide member 14 fixedly connected to the upper mold 3, a transverse shaft 15 is slidably mounted on the guide member 14, a first inclined surface 1501 which is formed at one end of the transverse shaft 15 and which rolls with the first cam 13, and the other end is connected to the guide member 14 via a second spring 16; a second cam 17 is also rotatably mounted on the transverse shaft 15, and two groups of third inclined surfaces 1901 arranged on the driving member 19 cooperate with the second cam 17, so that the transverse shaft 15 can be separated from the first cam 13 when the transverse shaft 15 performs a transverse reciprocating motion.

[0027] The initial state is defined as when the upper mold 3 and the lower mold 4 begin to separate. At this time, the second spring 16 is in a natural state. At this time, the horizontal axis 15 is below the first convex axis 13. At the same time, in this state, the upper mold 3 and the lower mold 4 are in a state of being in contact with each other to perform hot pressing. After the hot pressing molding is completed, the upper mold 3 moves away from the lower mold 4. At this time, the horizontal axis 15 can abut against the first convex axis 13, and drive the first convex axis 13 to move upward. At the same time, the first convex axis 13 drives the piston 9 to move upward through the connecting shaft 7 to draw external air into the pump cylinder body 5 while compressing the first spring 6. When the upper mold After the tool 3 moves to a predetermined height, the second protrusion 17 on the horizontal axis 15 can abut against the third inclined surface 1901 on the driving member 19, so that the horizontal axis 15 can slide relative to the guide member 14, and the second spring 16 is stretched, until the horizontal axis 15 is separated from the first protrusion 13, the first spring 6 can release elastic potential energy, and drive the piston 9 to accelerate downward movement, so that a positive pressure is generated in the pump cylinder body 5 to compress the air. At this time, the compressed air can enter between the hot-pressed part and the lower mold 4 through the conduit 11 and the pressure relief port 12, and the hot-pressed part and the lower mold 4 are separated by pressure.

[0028] When the thermoplastic epoxy glass fiber board material is placed on the lower mold 4, the upper mold 3 will move toward the lower mold 4, and the horizontal axis 15 will also move downward until the upper mold 3 is about to fit with the lower mold 4, and the first protrusion 13 abuts against the first inclined surface 1501 on the horizontal axis 15, and as the horizontal axis 15 continues to move downward, the horizontal axis 15 will move relative to the guide member 14 again and stretch the second spring 16 again, and when the horizontal axis 15 moves to the lower part of the first protrusion 13, the second spring 16 can release elastic potential energy and reset the horizontal axis 15, so that when the upper mold 3 moves upward again, the above steps can be repeated to achieve continuous processing, and after the upper mold 3 moves to a predetermined height, a positive pressure can be formed between the hot-pressed part and the lower mold 4 to facilitate separation of the two.

[0029] Through the above-mentioned arrangement, after hot pressing forming, the upper mold 3 can move away from the lower mold 4, and the external natural wind can act on the hot pressing molded part to assist its cooling and shaping. When high pressure is generated between the hot pressing molded part and the lower mold 4, the hot pressing molded part can be fully cooled and solidified, avoiding local deformation of the hot pressing molded part when the hot pressing molded part is separated from the lower mold 4 under high pressure. After the upper mold 3 moves to a predetermined height, the piston 9 compresses the air in the pump cylinder 5 to form a positive pressure between the hot pressing molded part and the lower mold 4, and under the action of pressure, the hot pressing molded part can be better separated from the lower mold 4, thereby effectively reducing the difficulty of removing the hot pressing molded part after hot pressing forming.

[0030] See also Figure 4 , Figure 6 The molding machine for preparing the back cover of consumer electronics that improves the efficiency of automatic demolding of products also includes: an abutment member 23, a telescopic rod and a side plate 31.

[0031] The abutment 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. When in use, when the upper mold 3 moves toward the lower mold 4, the epoxy glass fiber material can be pushed toward the lower mold 4. When the abutment 23 enters the groove 401, the upper surface of the abutment 23 is coplanar with the upper surface of the lower mold 4. The abutment 23 is connected to a supporting structure arranged on the lower mold 4, and a third cam is rotatably installed on the supporting structure. 24; the supporting structure includes a hysteresis sleeve 20 which is fixedly mounted on the lower mold 4 and whose opening is arranged along the vertical direction of the space, a telescopic shaft 22 which is fixedly connected to the abutment 23 is slidably mounted in the hysteresis sleeve 20, a limiting 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 limiting ring 2201, and the other end is connected to the inner wall of the hysteresis sleeve 20; the telescopic shaft 22 is rotatably connected to the third convex shaft 24.

[0032] In the initial state, the third spring 21 is in a compressed state, at which time the abutment 23 is at the high point of the stroke, and when the thermoplastic epoxy glass fiber board material is placed on the abutment 23, and the upper mold 3 and the lower mold 4 are fitted, the abutment 23 can be between the upper mold 3 and the lower mold 4, at which time the abutment 23 is at the lower part of the thermoplastic epoxy glass fiber 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 rod. After the hot pressing is completed, the upper mold 3 moves upward for a certain distance, and the telescopic rod can engage with the third convex shaft 24. Separation, at this time, the third spring 21 can release elastic potential energy and push the abutment 23 upward, at this time, the abutment 23 can act on both sides of the hot-pressed part, at this time, the hot-pressed part may not be separated from the lower mold 4, but the hot-pressed part has a tendency to separate from the lower mold 4 under the push of the abutment 23, and when positive pressure is generated between the hot-pressed part and the lower mold 4, the force of the abutment 23 acting on the hot-pressed part can assist the separation of the hot-pressed part and the lower mold 4, thereby improving the success rate of separation between the hot-pressed part and the lower mold 4 to a certain extent.

[0033] Among them, after the hot-pressed part is separated from the lower mold 4, the abutment part 23 can push the hot-pressed part upward, so that a certain gap can be generated between the hot-pressed part and the lower mold 4, thereby facilitating the removal of the hot-pressed part and avoiding burns.

[0034] See also Figure 4 , Figure 6 , Figure 7~Figure 8 , Fig.10, further, the telescopic rod is horizontally arranged and slidably installed on the lower mold 4, the telescopic rod is rollingly matched with the third cam 24, and a fourth cam 28 is rotatably installed on the telescopic rod. Specifically, a groove wheel 29 is rotatably installed on the telescopic rod, and the groove wheel 29 is rollingly connected with a guide member 30 arranged on the lower mold 4; the telescopic rod includes a follower sleeve 27 arranged on the lower mold 4 along the horizontal direction of the space and fixedly connected to the guide member 30, the interior of the follower sleeve 27 is a hollow structure, and a telescopic plate 25 rotatably connected with the fourth cam 28 is slidably installed in the follower sleeve 27, and a fourth inclined surface 2501 is formed on the end of the telescopic plate 25 away from the follower sleeve 27, and the fourth inclined surface 2501 is rollingly matched with the third cam 24; the telescopic rod also includes a follower sleeve 27 and a telescopic sleeve 27. The elastic limiting structure between the plates 25 comprises a fourth spring 26 arranged in 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 also 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 guide groove is formed on the side plate 31, and the fourth cam 28 is rollingly connected to the guide groove, so that the telescopic rod can be separated from the third cam 24 after the upper mold 3 and the lower mold 4 are separated. Specifically, the guide groove comprises an inclined groove 3102 arranged on the side plate 31, and the two ends of the inclined groove 3102 are connected to the first vertical groove 3101 and the second vertical groove 3103 arranged on the side plate 31.

[0035] 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 make the fourth cam 28 move along the first vertical groove 3101. At this time, the follower sleeve 27 and the telescopic plate 25 are in a stationary state relative to the third cam 24. In this process, a certain gap can be generated between the upper mold 3 and the lower mold 4, so that the natural wind from the outside can act on the hot-pressed molded parts, so that the hot-pressed molded parts can be quickly cooled and solidified, and when the abutment 23 is prevented from acting on the side of the hot-pressed molded parts, the hot-pressed molded parts are still in a softened state, resulting in the force of the abutment 23 acting on the side of the hot-pressed molded parts cannot be transmitted to the middle of the hot-pressed molded parts, thereby losing the effect of auxiliary separation.

[0036] As the side plate 31 continues to rise, the fourth cam 28 will move along the inclined groove 3102. At this time, the inclined groove 3102 and the fourth cam 28 will roll together to drive the follower sleeve 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 cam 24, the telescopic shaft 22 is unlocked. At this time, the third spring 21 releases its elastic potential energy, causing the abutment 23 to move upward to lift up both sides of the hot-pressed part.

[0037] Furthermore, similarly, when the hot pressing action is performed again, the upper mold 3 can reset the abutment 23 by acting on the thermoplastic epoxy glass fiber board material, and when the third cam 24 acts on the fourth inclined surface 2501, the telescopic plate 25 performs a telescopic action and resets, so that when the upper mold 3 moves upward again, the abutment 23 can act on both sides of the hot pressed part again.

[0038] Through the above-mentioned arrangement, when high pressure is generated between the hot-pressed part and the lower mold 4, the abutment 23 can drive the two sides of the hot-pressed part to move upward, so that when high pressure is generated between the hot-pressed part and the lower mold 4, the abutment 23 can assist the hot-pressed part to separate from the lower mold 4 by acting on the two sides of the hot-pressed part, thereby ensuring smooth separation between the hot-pressed part and the lower mold 4 and avoiding deformation, cracking and the like on the side of the hot-pressed part. After separation, the abutment 23 has the effect of lifting the hot-pressed part, so that when taking the hot-pressed part, there is no need to touch the lower mold 4, avoiding burns from the high temperature on the lower mold 4.

[0039] As an embodiment of the present invention, a method for preparing a back cover of consumer electronics using the molding machine for preparing a back cover of consumer electronics that improves the automatic demolding efficiency of products is also proposed, comprising the following steps: Step 1: Place the thermoplastic epoxy glass fiber board material on the lower mold 4, and then control the upper mold 3 to move toward the lower mold 4 until the upper mold 3 and the lower mold 4 are in contact with each other. At this time, the abutment member 23 and the upper mold 3 are in contact with each other, and the third convex shaft 24 is locked by the telescopic rod; Step 2: With the cooperation of the upper mold 3 and the lower mold 4, the thermoplastic epoxy glass fiber board material is softened and then vacuumed to form; Step 3: The upper mold 3 moves upward and drives the pump assembly to draw external air into the pump assembly; Step 4: After the pump assembly moves a certain distance, the guide groove cooperates with the fourth convex shaft 28 to reset the telescopic rod and the third convex shaft 24. At this time, the supporting structure drives the abutment member 23 to move upward to lift the corners of the formed material; Step 5: 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 cam 13. At this time, the pump pressure assembly compresses the air and injects the compressed air into the pressure relief port 12, using the pressure to separate the molded material from the lower mold 4.

[0040] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0041] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A molding machine for preparing back covers of consumer electronics to improve the efficiency of automatic demolding of products, including: 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 also includes: an abutment member, which is horizontally arranged on the side of the lower mold and adapted to the groove on the side of the lower mold, the abutment member is connected to a supporting structure arranged on the lower mold, and a third cam is rotatably installed on the supporting structure; a telescopic rod, which is horizontally arranged and slidably installed on the lower mold, the telescopic rod is rollingly matched with the third cam, and a fourth cam is rotatably installed on the telescopic rod; a side plate, connected to the lower mold, a guide groove is formed on the side plate, and the fourth cam is rollingly connected to the guide groove, so that the telescopic rod can be separated from the third cam after the upper mold is separated from the lower mold.

2. The molding machine for preparing the back cover of consumer electronics for improving the automatic demoulding efficiency of products according to claim 1, characterized in that: The supporting structure includes a hysteresis sleeve which is fixedly mounted on the lower mold and whose opening is arranged in the vertical direction of the space. A telescopic shaft which is vertically fixedly connected to the abutment member is slidably mounted 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 cam shaft.

3. The molding machine for preparing the back cover of consumer electronics for improving the automatic demoulding efficiency of products according to claim 1, characterized in that: The telescopic rod includes a follower sleeve plate arranged on the lower mold along the horizontal direction of the space, the interior of the follower sleeve plate is a hollow structure, and a telescopic plate rotatably connected to the fourth cam shaft is slidably installed in the follower sleeve plate, and a fourth inclined surface is formed at the end of the telescopic plate away from the follower sleeve plate, and the fourth inclined surface is rollingly matched with the third cam shaft; the telescopic rod also includes an elastic limiting structure arranged between the follower sleeve plate and the telescopic plate.

4. The molding machine for preparing the back cover of consumer electronics for improving the automatic demoulding efficiency of products according to claim 3, characterized in that: The elastic limiting structure includes a fourth spring arranged in the follower sleeve, one end of the fourth spring is connected to the follower sleeve, and the other end is connected to the telescopic plate; a limiting groove is also arranged on the side wall of the follower sleeve, and the limiting part arranged on the telescopic plate can slide in the limiting groove.

5. The molding machine for preparing the back cover of consumer electronics for improving the automatic demoulding efficiency of products according to claim 1, characterized in that: The guide groove comprises 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.

6. The molding machine for preparing the back cover of consumer electronics for improving the automatic demoulding efficiency of products according to claim 1, characterized in that: Also includes: A pressure relief port is provided on the lower mold, and is connected to a pump pressure assembly provided on the side of the lower mold; a telescopic assembly is connected to the upper mold, and cooperates with a first cam connected to the pump pressure assembly, so that when the upper mold moves upward, the pump pressure assembly can be driven to operate to draw external air into the pump pressure assembly; a driving member is installed on the bracket, and the driving member cooperates with the telescopic assembly, so that after the upper mold is raised to a predetermined height, the telescopic assembly can be separated from the first cam, and the pump pressure assembly can be operated to compress the external air and pump it to the pressure relief port.

7. The molding machine for preparing the back cover of consumer electronics for improving the automatic demoulding efficiency of products according to claim 6, characterized in that: The pumping assembly includes a pump cylinder body fixedly mounted on the side of the lower mold and with the central axis arranged in the vertical direction of the space. Two groups of one-way valves with opposite conduction directions are arranged on the pump cylinder body, one group of which is connected to a connector arranged on the lower mold through a conduit, and the connector is connected to the pressure relief port; the pumping assembly also includes an energy storage structure arranged in the pump cylinder body and connected to the first cam shaft. When the first cam shaft moves upward, it can drive the energy storage structure to store energy and draw external air into the pump cylinder body.

8. The molding machine for preparing the back cover of consumer electronics for improving the automatic demoulding efficiency of products according to claim 7, characterized in that: 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.

9. The molding machine for preparing the back cover of consumer electronics for improving the automatic demoulding efficiency of products according to claim 6, characterized in that: 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.

10. A method for preparing a back cover of consumer electronics using the molding machine for preparing a back cover of consumer electronics for improving the automatic demoulding efficiency of products as claimed in any one of claims 1 to 9, 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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