Ejection structure for injection molding of a deflector plate

Abstract

The utility model belongs to mould manufacturing technical field, concretely relates to a ejection structure for flow guide plate injection moulding, including bottom plate, the inner wall fixed mounting of bottom plate has connecting plate, the inner wall fixed mounting of bottom plate has guide rail, the left side fixed mounting of connecting plate has right mould, make the ejection action with the movement of left mould strict synchronization, can accurate control the ejection opportunity, avoid the deformation caused by ejection too early, or scratch caused by too late, in the process of ejector pin movement will contact with sponge ring, through the contact smearing of lubricating oil in sponge ring, make reduce the friction of ejector pin sliding, through the opening solenoid valve make the oil storage tank transport lubricating oil to the oil dripping pipe to give sponge ring to make up, and in the process of ejector pin reset every time through the chip removal ring to remove the surface attachment of chippings, prevent these chippings from entering guide bush to intensify the friction of ejector pin and guide bush, to improve the service life of ejector pin.

Description

Technical Field

[0001] This utility model belongs to the field of mold manufacturing technology, specifically relating to an ejection structure for injection molding of a guide plate. Background Technology

[0002] An ejection structure for injection molding of a guide plate is a mold component designed specifically to solve the problem of guide plate demolding. The core is to convert the ejection power of the injection molding machine into an ejection force adapted to the guide plate structure through the coordination of a specific ejection actuator and a power transmission mechanism, so as to realize the smooth release of the plastic part from the cavity and avoid deformation, scratches or adhesion.

[0003] Patent publication number CN207931024U discloses an ejection structure for a rear guide plate injection mold. The rear guide plate forms an undercut structure on its layout surface. Because the product has an undercut on the mold, it cannot be ejected normally, requiring manual assistance, thus resulting in low production efficiency and hindering product quality improvement. This utility model includes an A plate, a B plate, an upper mold core, and a lower mold core. The product is positioned on the lower mold core. A large slider is provided between the A plate and the B plate. The large slider is connected to a slanted guide post, which controls the slider's sideways movement. The product is connected to a pull rod insert, which is connected to a pull rod. The pull rod insert and the product move backward. This utility model, through structural improvements, enables smooth product ejection, improving production efficiency and finished product quality.

[0004] However, the current pressing device used for polyurethane damping pad foaming has the following problems: debris on the ejector pin surface will enter the ejector pin guide sleeve as the ejector pin moves and accumulate in the mating gap, resulting in increased frictional resistance between the ejector pin and the guide sleeve. Therefore, we propose an ejection structure for guide plate injection molding. Utility Model Content

[0005] The purpose of this invention is to provide an ejector structure for injection molding of a guide plate, which can solve the problem in related technologies where debris on the surface of the ejector pin moves into the ejector pin guide sleeve and accumulates in the mating gap, resulting in increased frictional resistance between the ejector pin and the guide sleeve.

[0006] The specific technical solution adopted by this utility model is as follows:

[0007] An ejection structure for injection molding of a guide plate includes a base plate, a connecting plate fixedly installed on the inner wall of the base plate, a guide rail fixedly installed on the inner wall of the base plate, a right mold fixedly installed on the left side of the connecting plate, a pressure plate slidably installed on the circumferential surface of the guide rail, a left mold fixedly installed on the right side of the pressure plate, a top plate slidably installed on the surface of the connecting plate, an ejector pin fixedly installed on the left side of the top plate, a chain conveyor between the left mold and the top plate, and an ejection mechanism provided on the surface of the base plate. The ejection mechanism includes a limiting rod, which is fixedly installed on the right side of the right mold, and the fixed end of a hydraulic rod is fixedly installed on the inner wall of the right mold. In use, the pressure plate moves along the guide rail, and the movement of the pressure plate drives the left mold to move towards the right mold for mold closing. When the mold opens, the pressure plate resets, causing the left mold to reset. At this time, the movement of the left mold pulls the chain conveyor, causing the top plate to be pulled. The movement of the top plate drives the ejector pin to move, thereby ejecting the mold.

[0008] A mounting button is provided on the right side of the right mold, and a chip removal ring is fixedly mounted on the surface of the mounting button.

[0009] The number of mounting buttons and chip removal rings is set to four, and they are arranged in a circular array along the center of the right mold. The chip removal rings are in contact with the ejector pins.

[0010] An oil storage tank is fixedly installed on the top of the right mold. The oil storage tank and the right mold are connected by a pipe, and a solenoid valve is installed on the surface of the pipe.

[0011] The surface of the right mold is provided with a sponge ring, and the surface of the right mold is provided with an oil drip pipe. The oil drip pipe is connected to a pipeline and is located above the sponge ring. The sponge ring is in contact with the ejector pin. The number of sponge rings and oil drip pipes is set to four, and they are arranged in a circular array along the center circumference of the right mold.

[0012] An auxiliary mechanism is provided on the surface of the base plate. The auxiliary mechanism includes a push rod, which is slidably installed on the inner wall of the base plate. A toothed rack is provided at the bottom of the push rod, and an arc plate is fixedly installed on the inner wall of the base plate.

[0013] A gear is rotatably mounted on the inner wall of the arc plate, and a rack is fixedly mounted on the left side of the pressure plate. The rack meshes with the gear, and the gear meshes with the rack.

[0014] The technical effects achieved by this utility model are as follows:

[0015] This invention utilizes an ejection mechanism. During mold opening, the movement of the left mold pulls the chain belt, causing the top plate to be pulled. The movement of the top plate then drives the ejector pins to move, thus ejecting the ejector pins. This ensures that the ejection action is strictly synchronized with the movement of the left mold, allowing for precise control of the ejection timing and preventing deformation caused by ejection too early or scratches caused by ejection too late. During the movement of the ejector pins, they come into contact with the sponge ring, where lubricating oil is applied to reduce friction during pin sliding. By opening a solenoid valve, the oil reservoir delivers lubricating oil to the drip pipe to replenish the sponge ring. Each time the ejector pins reset, a chip removal ring removes debris adhering to the surface, preventing these debris from entering the guide sleeve and increasing friction between the ejector pins and the guide sleeve, thereby improving the service life of the ejector pins.

[0016] This invention utilizes an auxiliary mechanism. The reset of the left mold is a crucial step before mold closing. If the plastic part is still stuck together at this time, the continued reset of the left mold may cause the plastic part to be squeezed and deformed by the cavity, or it may collide with the right mold during the next mold closing. At this time, the reset of the pressure plate drives the rack rod to move. The movement of the rack rod causes the gear to rotate, and the rotation of the gear causes the ejector rod to move. The ejector rod provides additional ejection force, actively pushing the stuck parts during the reset of the left mold and breaking the adhesion in time. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the entire utility model;

[0018] Figure 2 This is a schematic diagram of the structure at the position of the top plate and the connecting plate of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure at the position of the limiting rod and the top plate of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure at the position of the hydraulic rod and the top plate of this utility model;

[0021] Figure 5 This is a schematic diagram of the structure at the location of the ejection mechanism of this utility model;

[0022] Figure 6 This is a schematic diagram of the structure at the location of the auxiliary mechanism of this utility model.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. Base plate; 2. Connecting plate; 3. Guide rail; 4. Right mold; 5. Pressure plate; 6. Left mold; 7. Top plate; 8. Ejector pin; 9. Chain belt; 10. Ejection mechanism; 100. Limiting rod; 101. Hydraulic rod; 102. Mounting button; 103. Chip removal ring; 104. Oil reservoir; 105. Solenoid valve; 106. Sponge ring; 107. Oil drip pipe; 11. Auxiliary mechanism; 110. Ejector rod; 111. Arc plate; 112. Gear; 113. Rack and pinion. Detailed Implementation

[0025] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0026] like Figure 1-5 As shown, an ejection structure for injection molding of a guide plate includes a base plate 1, a connecting plate 2 fixedly installed on the inner wall of the base plate 1, a guide rail 3 fixedly installed on the inner wall of the base plate 1, a right mold 4 fixedly installed on the left side of the connecting plate 2, a pressure plate 5 slidably installed on the circumferential surface of the guide rail 3, a left mold 6 fixedly installed on the right side of the pressure plate 5, a top plate 7 slidably installed on the surface of the connecting plate 2, an ejector pin 8 fixedly installed on the left side of the top plate 7, a chain 9 between the left mold 6 and the top plate 7, and an ejection mechanism 10 provided on the surface of the base plate 1. The ejection mechanism 10 includes a limiting rod 100, which is fixedly installed on the right side of the right mold 4. The fixed end of the hydraulic rod 101 is fixedly installed on the inner wall of the right mold 4, so that the ejection action is strictly synchronized with the movement of the left mold 6, which can accurately control the ejection timing and avoid deformation caused by ejection too early or scratches caused by ejection too late.

[0027] A mounting button 102 is provided on the right side of the right mold 4. A chip removal ring 103 is fixedly mounted on the surface of the mounting button 102. When the ejector pin 8 resets each time, the chip removal ring 103 removes the debris attached to the surface, preventing these debris from entering the guide sleeve and aggravating the friction between the ejector pin 8 and the guide sleeve, thereby improving the service life of the ejector pin 8.

[0028] The number of mounting buttons 102 and chip removal rings 103 is set to four, and they are arranged in a circular array along the center of the right mold 4. The chip removal rings 103 contact the ejector pins 8, and no further additions are made.

[0029] An oil storage tank 104 is fixedly installed on the top of the right mold 4. The oil storage tank 104 is connected to the right mold 4 through a pipe. A solenoid valve 105 is provided on the surface of the pipe. By opening the solenoid valve 105, the oil storage tank 104 delivers lubricating oil to the drip pipe 107 to replenish the sponge ring 106.

[0030] The surface of the right mold 4 is provided with a sponge ring 106 and an oil dripping pipe 107. The oil dripping pipe 107 is connected to a pipe and is located above the sponge ring 106. The sponge ring 106 is in contact with the ejector pin 8. The number of sponge rings 106 and oil dripping pipes 107 is set to four and arranged in a circular array along the center of the right mold 4 without further additions.

[0031] According to the above structure, during use, the pressure plate 5 moves along the guide rail 3. The movement of the pressure plate 5 drives the left mold 6 to move towards the right mold 4 for mold closing. When the mold opens, the pressure plate 5 resets, causing the left mold 6 to reset as well. At this time, the movement of the left mold 6 pulls the chain belt 9, causing the top plate 7 to be pulled. The movement of the top plate 7 then drives the ejector pin 8 to move, thus ejecting the mold. This ensures that the ejection action is strictly synchronized with the movement of the left mold 6, allowing for precise control of the ejection timing and avoiding deformation due to premature ejection or scratches due to delayed ejection. When the top plate 7 moves, it contacts the hydraulic rod 101. At this time, the chain drive relies on the uniform movement of the moving mold, and the ejection mechanism 10... During movement, inertia can easily cause impacts, leading to cracks at the edge of the guide plate or surface vibration marks. The impact can be absorbed by the oil damping effect of the hydraulic rod 101. During the movement of the ejector pin 8, it will come into contact with the sponge ring 106. The lubricating oil in the sponge ring 106 will be used to apply the lubricating oil, thereby reducing the friction generated when the ejector pin 8 slides. By opening the solenoid valve 105, the oil reservoir 104 delivers lubricating oil to the drip pipe 107 to replenish the sponge ring 106. Each time the ejector pin 8 resets, the chip removal ring 103 removes the debris attached to the surface, preventing these debris from entering the guide sleeve and aggravating the friction between the ejector pin 8 and the guide sleeve, thereby improving the service life of the ejector pin 8.

[0032] like Figure 1-5 As shown, an auxiliary mechanism 11 is provided on the surface of the base plate 1. The auxiliary mechanism 11 includes a push rod 110, which is slidably installed on the inner wall of the base plate 1. A rack is provided at the bottom of the push rod 110, and an arc plate 111 is fixedly installed on the inner wall of the base plate 1.

[0033] A gear 112 is rotatably mounted on the inner wall of the arc plate 111, and a rack rod 113 is fixedly mounted on the left side of the pressure plate 5. The rack rod 113 meshes with the gear 112, and the gear 112 meshes with the rack. The push rod 110 provides additional push force, which actively pushes the sticky parts during the reset process of the left mold 6 to break the stickiness in time.

[0034] According to the above structure, the reset of the left mold 6 is a key step before mold closing. If the plastic part is still stuck at this time, the continued reset of the left mold 6 may cause the plastic part to be squeezed and deformed by the cavity, or collide with the right mold 4 during the next mold closing. At this time, the reset of the pressure plate 5 drives the rack rod 113 to move. The movement of the rack rod 113 causes the gear 112 to rotate. The rotation of the gear 112 causes the ejector rod 110 to move. The ejector rod 110 provides additional ejection force and actively pushes the stuck parts during the reset of the left mold 6 to break the adhesion in time.

[0035] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. An ejector structure for injection molding of a guide vane, comprising a base plate (1), characterized in that, A connecting plate (2) is fixedly installed on the inner wall of the base plate (1), a guide rail (3) is fixedly installed on the inner wall of the base plate (1), a right mold (4) is fixedly installed on the left side of the connecting plate (2), a pressure plate (5) is slidably installed on the circumferential surface of the guide rail (3), a left mold (6) is fixedly installed on the right side of the pressure plate (5), a top plate (7) is slidably installed on the surface of the connecting plate (2), an ejector pin (8) is fixedly installed on the left side of the top plate (7), a chain belt (9) is provided between the left mold (6) and the top plate (7), and an ejection mechanism (10) is provided on the surface of the base plate (1). The ejection mechanism (10) includes a limiting rod (100) and a hydraulic rod (101). The limiting rod (100) is fixedly installed on the right side of the right mold (4), and the fixed end of the hydraulic rod (101) is fixedly installed on the inner wall of the right mold (4).

2. The ejection structure for injection molding of a guide plate according to claim 1, characterized in that: The right mold (4) is provided with a mounting button (102) on the right side, and a chip removal ring (103) is fixedly mounted on the surface of the mounting button (102).

3. The ejection structure for injection molding of a guide plate according to claim 2, characterized in that: The number of mounting buttons (102) and chip removal rings (103) is set to four, and they are arranged in a circular array along the center of the right mold (4). The chip removal rings (103) are in contact with the ejector pins (8).

4. The ejection structure for injection molding of a guide plate according to claim 1, characterized in that: An oil storage tank (104) is fixedly installed on the top of the right mold (4). The oil storage tank (104) and the right mold (4) are connected by a pipe. A solenoid valve (105) is provided on the surface of the pipe.

5. The ejection structure for injection molding of a guide plate according to claim 1, characterized in that: The surface of the right mold (4) is provided with a sponge ring (106) and an oil dripping pipe (107) on the surface of the right mold (4). The oil dripping pipe (107) is connected to a pipe and is located above the sponge ring (106). The sponge ring (106) is in contact with the ejector pin (8). The number of sponge rings (106) and oil dripping pipes (107) is set to four and arranged in a circular array along the center circumference of the right mold (4).

6. The ejection structure for injection molding of a guide vane according to claim 1, characterized in that: An auxiliary mechanism (11) is provided on the surface of the base plate (1). The auxiliary mechanism (11) includes a top rod (110). The top rod (110) is slidably installed on the inner wall of the base plate (1). A toothed rack is provided at the bottom of the top rod (110). An arc plate (111) is fixedly installed on the inner wall of the base plate (1).

7. The ejection structure for injection molding of a guide vane according to claim 6, characterized in that: A gear (112) is rotatably mounted on the inner wall of the arc plate (111), and a rack rod (113) is fixedly mounted on the left side of the pressure plate (5). The rack rod (113) meshes with the gear (112), and the gear (112) meshes with the rack.

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