Pneumatic demolding injection mold for automotive upholstery

Abstract

The utility model provides a pneumatic demolding injection mold for automotive upholstery, and belongs to the technical field of automobile part manufacturing. The injection mold comprises a movable mold body, a fixed mold body, vertical plates and a bottom plate, the fixed mold body and the bottom plate are connected through the two vertical plates, a side wall air jacking assembly used for jacking the inner wall of the automobile interior trim part open and blowing air and a bottom air jacking assembly used for blowing air towards the bottom end of the automobile interior trim part are arranged in the fixed mold body, and a motor and an air pump are fixed to the bottom plate. A gas conveying pipe is vertically arranged in the fixed mold in a penetrating manner, a driven gear is fixedly connected outside the lower end of the gas conveying pipe, a driving gear meshed with the driven gear is fixed to an output shaft of the motor, and an upper gas outlet communicated with the side wall gas cap assembly and a lower gas outlet connected with the bottom gas cap assembly are formed in the side face of the gas conveying pipe; the lower end of the air conveying pipe communicates with an air pump through a three-way pipeline. The inner side wall of a product is firstly blown through the air pump, the air cylinder drives the ejector rod to eject the contact surface of the inner top surface and the fixed mold, and finally the bottom of the product is blown, so that the product can be easily blown off from the mold.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts manufacturing technology, and relates to a pneumatic demolding injection mold for automotive interior parts. Background Technology

[0002] Some injection-molded products fit tightly to the mold surface. In this case, air pins need to be installed in the mold core. Before the ejector pin ejects the product, compressed air is used to blow the product out of the mold surface first, and then the ejector pin ejects it completely. For some deep-cavity products, the ejector pin is not long enough to completely eject the product from the mold cavity. In this case, an air pump needs to be used to continue blowing air into the product during the ejection process to ensure complete separation. Utility Model Content

[0003] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a pneumatic demolding injection mold for automotive interior parts, which uses an air pump and ejector pins to quickly demold the product.

[0004] The purpose of this utility model can be achieved through the following technical solution: A pneumatic demolding injection mold for automotive interior parts, comprising a moving mold, a fixed mold, a vertical plate, and a base plate, characterized in that the gap between the moving mold and the fixed mold after mold closing forms a mold cavity, the fixed mold and the base plate are connected by two vertical plates, the fixed mold is provided with a side wall air ejector assembly that pushes open the inner wall of the automotive interior part and blows air, and a bottom air ejector assembly that blows air towards the bottom end of the automotive interior part, a motor and an air pump are fixed on the base plate, an air supply pipe is vertically inserted in the fixed mold, a driven gear is fixedly connected to the lower end of the air supply pipe, a driving gear that meshes with the driven gear is fixed on the output shaft of the motor, the side of the air supply pipe has an upper air outlet that connects to the side wall air ejector assembly and a lower air outlet that connects to the bottom air ejector assembly, the lower end of the air supply pipe is connected to the air pump through a three-way pipe, the lower end of the air supply pipe is inserted into the three-way pipe and is rotatably connected to the three-way pipe through a bearing.

[0005] Furthermore, the sidewall air ejector assembly includes a side slide groove that is laterally opened on the sidewall of the fixed mold. The inner end of the side slide groove can be connected to the upper air outlet through a first air passage. A side slide block is slidably provided in the side slide groove. A protruding limiting block is fixed on the inner wall of the side slide groove. A spring rod is connected to the inner end of the side slide block. After the spring rod passes through the limiting block, it is connected to a support block. A first spring is sleeved on the spring rod. The outer end of the first spring abuts against the limiting block, and the inner end of the first spring abuts against the support block. Under the action of the first spring, the side slide block and the limiting block are in close contact, and the outer side surface of the side slide block is flush with the sidewall of the fixed mold. A side air passage that can connect the inner cavity of the side slide groove and the mold cavity is opened on the side slide block.

[0006] When the upper air outlet rotates to connect with the first air passage, the air pump outputs air to the air supply pipe, which enters the side slide groove from the first air passage. The air pressure in the side slide groove increases, pushing the side slider to slide outward, causing the first spring to compress and shorten. After the side slider moves outward, it continues until the side air passage connects the mold cavity and the side slide groove. The side slider pushes open the inner wall of the automotive interior part, and at the same time introduces air into the gap between the fixed mold and the automotive interior part, thereby loosening the side contact surface between the product and the fixed mold.

[0007] Furthermore, the bottom air ejector assembly includes a transverse square hole on the side of the fixed mold, a square block slidably disposed in the square hole, a second spring disposed in the transverse square hole, a plug threadedly connected to the opening of the transverse square hole, the outer end of the second spring abutting against the plug, the inner end of the second spring abutting against the square block, the inner end of the transverse square hole communicating with the lower air outlet through a second air passage, and a bottom air passage communicating with the bottom of the mold cavity and the second air passage on the square block.

[0008] When the air outlet rotates to connect with the second air passage, the air pump outputs air to the air supply pipe, which enters the horizontal square hole from the second air passage, pushing the square block to slide outward and squeeze the second spring until the bottom air passage connects the mold cavity and the second air passage. High-pressure gas blows towards the bottom of the car interior part, blowing the car interior part away from the mold cavity.

[0009] Furthermore, the upper end of the fixed mold has a groove, in which a top plate is embedded. The upper end of the output pipe is in contact with the lower end of the top plate. An ejector rod is provided inside the air supply pipe. The upper end of the ejector rod is fixedly connected to the top plate. The lower end of the ejector rod passes through the air supply pipe and the tee pipe. A vertical sliding groove is provided on the bottom plate. An ejector slider is provided inside the sliding groove. The ejector slider is fixedly connected to the lower end of the ejector rod.

[0010] The cylinder is activated, pushing the ejector slider upwards. The ejector rod moves upwards relative to the air supply pipe, and the top plate pushes open the upper surface of the automotive interior part from the fixed mold. This loosens the top contact surface between the automotive interior part and the fixed mold, improving the demolding efficiency.

[0011] Furthermore, the top plate is disc-shaped, and several transversely penetrating ventilation slots are formed on the lower end face of the top plate. The ventilation slots are connected to the upper end of the air supply pipe. Because the top plate and the slot are tightly fitted, air cannot be blown when the top plate is stationary. When the ejector rod pushes the top plate to open the automotive interior part a certain distance, the gap between the upper end face of the fixed mold and the automotive interior surface is connected to the ventilation slots, which can assist the bottom air ejector assembly in blowing the automotive interior part product away from the fixed mold.

[0012] Furthermore, the lower end of the push rod slides into the tee pipe. This improves the sealing performance and prevents air from leaking out of the tee pipe from its lower end.

[0013] Furthermore, the upper and lower air outlets are staggered at 90°.

[0014] Furthermore, an injection needle is inserted through the moving mold, and the outlet of the injection needle is connected to the mold cavity.

[0015] After the product cools and sets, the moving mold separates from the fixed mold. When the product needs to be demolded, the motor is first started to drive the drive gear to rotate, and the driven gear and the air supply pipe rotate together, connecting the upper air outlet with the side wall air ejector assembly. At this time, the lower air outlet is closed, and the air pump is started to blow air onto the side wall of the product, loosening its contact surface. Then, the cylinder is started to push the ejector slider upward, blowing air onto the inner bottom surface of the product, loosening the upper end face of the fixed mold from the inner top surface of the product. Next, the motor is started to rotate 90°, connecting the lower air outlet with the bottom air ejector assembly. At this time, the upper air outlet is closed, and high-pressure gas blows the automotive interior parts from the bottom air channel. Combined with the upward movement of the top plate and the blowing of air onto the inner top surface, the product quickly detaches from the fixed mold.

[0016] Compared with existing technologies, the pneumatic ejection injection mold for this automotive interior part has the following advantages:

[0017] 1. Reduce the movement distance of the top plate, and subsequent demolding mainly relies on pneumatic blowing of the product.

[0018] 2. First, blow air into the inner sidewall of the product to loosen the contact surface of the sidewall. Then, use a cylinder to open the contact surface between the inner top surface and the fixed mold, so that the inner top surface also begins to loosen. Finally, blow air into the bottom of the product, which can easily blow the product off the mold. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the pneumatic ejection injection mold for automotive interior parts.

[0020] Figure 2 This is a schematic diagram of the gas pipeline structure.

[0021] Figure 3 yes Figure 1 Enlarged view at point A.

[0022] Figure 4 This is a schematic diagram of the assembly of the top rod and the top plate.

[0023] In the diagram, 1. Moving mold; 2. Fixed mold; 3. Vertical plate; 4. Base plate; 5. Mold cavity; 6. Motor; 61. Drive gear; 7. Air pump; 8. Air supply pipe; 81. Upper air outlet; 82. Lower air outlet; 83. Driven gear; 9. T-shaped pipe; 10. Side wall air ejector assembly; 101. Side slide groove; 102. First air passage; 103. Side slider; 104. Limit block; 105. Spring rod; 106. Support block; 107. First spring; 108. Side air passage; 11. Bottom air ejector assembly; 111. Horizontal square hole; 112. Square block; 113. Second spring; 114. Plug; 115. Second air passage; 116. Bottom air passage; 12. Top plate; 121. Vent groove; 13. Ejector rod; 14. Slide groove; 15. Ejector slider; 16. Injection needle tube. Detailed Implementation

[0024] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0025] like Figure 1 As shown, the pneumatic ejection injection mold for this automotive interior part includes a moving mold 1, a fixed mold 2, a vertical plate 3, and a bottom plate 4. The gap between the moving mold 1 and the fixed mold 2 after they are closed forms a mold cavity 5. The fixed mold 2 and the bottom plate 4 are connected by two vertical plates 3. The fixed mold 2 is provided with a side wall air ejector assembly 10 that pushes open the inner wall of the automotive interior part and blows air, and a bottom air ejector assembly 11 that blows air toward the bottom of the automotive interior part.

[0026] A motor 6 and an air pump 7 are fixed on the base plate 4, such as Figure 2 As shown, a gas supply pipe 8 is vertically installed inside the fixed mold 2. A driven gear 83 is fixedly connected to the lower end of the gas supply pipe 8. A driving gear 61 that meshes with the driven gear 83 is fixed on the output shaft of the motor 6. The side of the gas supply pipe 8 has an upper air outlet 81 that connects to the side wall air top assembly 10 and a lower air outlet 82 that connects to the bottom air top assembly 11. The lower end of the gas supply pipe 8 is connected to the air pump 7 through a three-way pipe 9. The lower end of the gas supply pipe 8 is inserted into the three-way pipe 9 and is rotatably connected to the three-way pipe 9 through a bearing.

[0027] like Figure 3As shown, the sidewall air ejector assembly 10 includes a side slide groove 14101 laterally opened on the sidewall of the fixed mold 2. The inner end of the side slide groove 14101 can communicate with the upper air outlet 81 through the first air passage 102. A side slide block 103 is slidably disposed in the side slide groove 14101. A protruding limiting block 104 is fixed on the inner wall of the side slide groove 14101. A spring rod 105 is connected to the inner end of the side slide block 103. The spring rod 105 passes through the limiting block 104 and is connected to... There is a support block 106, and a first spring 107 is sleeved on the spring rod 105. The outer end of the first spring 107 abuts against the limiting block 104, and the inner end of the first spring 107 abuts against the support block 106. Under the action of the first spring 107, the side slider 103 is in close contact with the limiting block 104, and the outer side of the side slider 103 is flush with the side wall of the fixed mold 2. The side slider 103 has a side air passage 108 that can connect the inner cavity of the side slide groove 14101 and the mold cavity 5.

[0028] When the upper air outlet 81 rotates to connect with the first air passage 102, the air pump 7 outputs air to the air supply pipe 8, which enters the side slide groove 14101 from the first air passage 102. The air pressure in the side slide groove 14101 increases, pushing the side slider 103 to slide outward, causing the first spring 107 to compress and shorten. After the side slider 103 moves outward, it continues until the side air passage 108 connects the mold cavity 5 and the side slide groove 14101. The side slider 103 pushes open the inner wall of the automotive interior part, and at the same time introduces air into the gap between the fixed mold 2 and the automotive interior part, thereby loosening the side contact surface between the product and the fixed mold 2.

[0029] The bottom air ejector assembly 11 includes a transverse square hole 111 on the side of the fixed mold 2, a square block 112 slidingly disposed in the square hole, a second spring 113 disposed in the transverse square hole 111, a plug 114 threadedly connected to the opening of the transverse square hole 111, the outer end of the second spring 113 abutting against the plug 114, the inner end of the second spring 113 abutting against the square block 112, the inner end of the transverse square hole 111 being able to communicate with the lower air outlet 82 through the second air passage 115, and a bottom air passage 116 connected to the bottom of the mold cavity 5 and the second air passage 115 on the square block 112.

[0030] When the air outlet 82 rotates to connect with the second air passage 115, the air pump 7 outputs air to the air supply pipe 8, which enters the transverse square hole 111 from the second air passage 115, pushing the square block 112 to slide outward and squeeze the second spring 113 until the bottom air passage 116 connects the mold cavity 5 and the second air passage 115. The high-pressure gas blows towards the bottom of the car interior part, blowing the car interior part away from the mold cavity 5.

[0031] The fixed mold 2 has a groove at its upper end, and a top plate 12 is embedded in the groove. The upper end of the output pipe is in contact with the lower end of the top plate 12. A push rod 13 is provided in the air supply pipe 8. The upper end of the push rod 13 is fixedly connected to the top plate 12. The lower end of the push rod 13 passes through the air supply pipe 8 and the three-way pipe 9. A vertical sliding groove 14 is provided on the bottom plate 4. An ejector slider 15 is provided in the sliding groove 14. The ejector slider 15 is fixedly connected to the lower end of the push rod 13.

[0032] The cylinder is activated, pushing the ejector slider 15 upwards. The ejector rod 13 moves upwards relative to the air supply pipe 8, and the top plate 12 pushes open the upper surface of the automotive interior part and the fixed mold 2. This loosens the top contact surface between the automotive interior part and the fixed mold 2, improving the demolding efficiency of the product.

[0033] like Figure 4 As shown, the top plate 12 is disc-shaped, and several transversely penetrating ventilation slots 121 are opened on the lower end surface of the top plate 12. The ventilation slots 121 are connected to the upper end of the air supply pipe 8. Since the top plate 12 is tightly fitted with the slot, air cannot be blown when the top plate 12 is stationary. When the push rod 13 pushes the top plate 12 to open the automotive interior part a certain distance, the gap between the upper end surface of the fixed mold 2 and the automotive interior surface is connected to the ventilation slots 121, which can assist the bottom air top assembly 11 in blowing the automotive interior part product away from the fixed mold 2.

[0034] The lower end of the push rod 13 slides into the tee pipe 9. This improves the sealing performance and prevents air from leaking out of the lower end of the tee pipe 9. The upper air outlet 81 and the lower air outlet 82 are staggered at 90°.

[0035] Workflow: An injection needle tube 16 is installed on the moving mold 1, and the outlet of the injection needle tube 16 is connected to the mold cavity 5. Plastic raw material is injected into the mold cavity 5 through the injection needle tube 16. After the product cools and solidifies, the moving mold 1 separates from the fixed mold 2. When the product needs to be demolded, the motor 6 is started first to drive the drive gear 61 to rotate, and the driven gear 83 and the air supply pipe 8 rotate together, so that the upper air outlet 81 is connected to the side wall air ejector assembly 10. At this time, the lower air outlet 82 is closed. The air pump 7 is started to blow air into the side wall of the product to loosen its side wall contact surface. Then the cylinder is started to push the ejector slider 15 to move upward, blowing air into the inner bottom surface of the product, so that the upper end surface of the fixed mold 2 is loosened from the inner top surface of the product. Next, start the motor 6 and rotate it 90° to connect the lower air outlet 82 with the bottom air top assembly 11. At this time, the upper air outlet 81 is closed, and high-pressure gas blows the car interior parts from the bottom air channel 116. Combined with the upward movement of the top plate 12 and the blowing of air on the inner top surface, the product quickly separates from the fixed mold 2.

[0036] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A pneumatic release injection mold for automotive interior parts, comprising a moving mold, a fixed mold, a vertical plate, and a base plate, characterized in that, The gap between the moving mold and the fixed mold after they are closed forms a mold cavity. The fixed mold and the base plate are connected by two vertical plates. The fixed mold is equipped with a side wall air top assembly that pushes open the inner wall of the car interior parts and blows air, and a bottom air top assembly that blows air towards the bottom of the car interior parts. A motor and an air pump are fixed on the base plate. An air supply pipe is vertically inserted into the fixed mold. A driven gear is fixedly connected to the lower end of the air supply pipe. A driving gear that meshes with the driven gear is fixed on the output shaft of the motor. The side of the air supply pipe has an upper air outlet that connects to the side wall air top assembly and a lower air outlet that connects to the bottom air top assembly. The lower end of the air supply pipe is connected to the air pump through a three-way pipe. The lower end of the air supply pipe is inserted into the three-way pipe and is rotatably connected to the three-way pipe through a bearing.

2. The pneumatic release injection mold for automotive interior parts according to claim 1, characterized in that, The sidewall air ejector assembly includes a side slide groove that is laterally opened on the sidewall of the fixed mold. The inner end of the side slide groove can be connected to the upper air outlet through a first air passage. A side slide block is slidably provided in the side slide groove. A protruding limiting block is fixed on the inner wall of the side slide groove. A spring rod is connected to the inner end of the side slide block. After the spring rod passes through the limiting block, it is connected to a support block. A first spring is sleeved on the spring rod. The outer end of the first spring abuts against the limiting block, and the inner end of the first spring abuts against the support block. Under the action of the first spring, the side slide block and the limiting block are in close contact, and the outer side of the side slide block is flush with the sidewall of the fixed mold. A side air passage that can connect the inner cavity of the side slide groove and the mold cavity is opened on the side slide block.

3. The pneumatic release injection mold for automotive interior parts according to claim 2, characterized in that, The bottom air ejector assembly includes a horizontal square hole on the side of the fixed mold, a square block that slides inside the square hole, and a second spring inside the horizontal square hole. A plug is threaded to the opening of the horizontal square hole. The outer end of the second spring abuts against the plug, and the inner end of the second spring abuts against the square block. The inner end of the horizontal square hole can communicate with the lower air outlet through a second air passage. A bottom air passage is opened on the square block that connects the bottom of the mold cavity and the second air passage.

4. The pneumatic release injection mold for automotive interior parts according to claim 3, characterized in that, The fixed mold has a groove at its upper end, in which a top plate is embedded. The upper end of the output pipe is in contact with the lower end of the top plate. An ejector rod is installed inside the air supply pipe. The upper end of the ejector rod is fixedly connected to the top plate. The lower end of the ejector rod passes through the air supply pipe and the tee pipe. A vertical sliding groove is opened on the bottom plate. An ejector slider is installed inside the sliding groove. The ejector slider is fixedly connected to the lower end of the ejector rod.

5. The pneumatic release injection mold for automotive interior parts according to claim 4, characterized in that, The top plate is disc-shaped, and several transverse ventilation slots are opened on the lower end face of the top plate.

6. The pneumatic release injection mold for automotive interior parts according to claim 5, characterized in that, The lower end of the push rod slides into the tee pipe.

7. The pneumatic release injection mold for automotive interior parts according to claim 6, characterized in that, The upper and lower air outlets are staggered at 90°.

8. The pneumatic release injection mold for automotive interior parts according to claim 1, characterized in that, An injection needle is inserted through the moving mold, and the outlet of the injection needle is connected to the mold cavity.

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