Automobile interior trim part injection mold based on gas assistance

Abstract

The utility model provides an automobile interior trim part injection mold based on gas assistance, and belongs to the technical field of injection molds. The automobile interior trim part injection mold based on gas assistance comprises an upper mold plate, a lower mold plate and a mold core, an ejector rod is sleeved with a sleeve sliding along the ejector rod, the upper end of the sleeve is provided with a horizontally-unfolded sealing lifting plate attached to the inner wall of an ejector hole, the lower end of the ejector hole is in threaded connection with a plug, and the lower end of the ejector rod and the lower end of the sleeve both penetrate out of the plug. The lower end of the sleeve is connected with a driven block, the lower end of the ejector rod penetrates out of the sleeve and then is connected with a limiting plate, a driving block is arranged between the limiting plate and the driven block, the ejector rod is sleeved with the driving block, the driving block slides up and down along the ejector rod, the sleeve is sleeved with a first spring, the upper end of the first spring abuts against the sealing lifting plate, and the lower end of the first spring abuts against the plug. The ejector plate is ejected by compressed air, thrust applied to the ejector plate is gradually increased and finally reaches a critical point, the automotive upholstery is ejected out, ejection force is smooth, and products can be well protected.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molds and relates to a gas-assisted injection mold for automobile interior decoration parts. Background Art

[0002] The automotive interior system is a crucial component of the vehicle body, and its design effort accounts for over 60% of the vehicle's styling, far exceeding the vehicle's exterior, making it one of the most crucial components of the vehicle body. A large portion of automotive interior components are made of plastic and produced using injection molds. During demolding, some interior components are directly ejected upwards by ejector pins. Due to the small force-bearing area, excessive ejection force can easily cause bulging, deformation, bending, or even breakage of the interior components. Utility Model Content

[0003] The purpose of the utility model is to address the above-mentioned problems in the existing technology and propose a gas-assisted injection mold for automobile interior decoration parts. The mold uses compressed air to eject the ejector plate. The thrust exerted on the ejector plate gradually increases and finally reaches a critical point to eject the automobile interior decoration parts. The ejection force is relatively smooth and can better protect the product.

[0004] The purpose of the utility model can be achieved through the following technical solutions: a gas-assisted automobile interior decoration injection mold, comprising an upper template, a lower template and a mold core, characterized in that side ear plates are fixed on both sides of the upper template, a vertically arranged piston groove is opened on the lower template, a vertically arranged piston rod is fixed on the side ear plates, the lower end of the piston rod has a piston block located in the piston groove and sliding up and down along the piston groove, an inwardly concave upper mold cavity is opened on the lower end surface of the upper template, a lower mold cavity is opened at the center of the upper end of the lower template, the mold core is fixed in the lower mold cavity, a transverse hole is opened horizontally at the bottom of the piston groove, a pressure accumulation component is provided in the transverse hole, a through-feeding hole is opened at the center of the mold core and the lower template, a ejecting rod is provided in the ejecting hole, and the upper end of the ejecting rod is fixed with an ejecting rod embedded in the embedding groove of the lower template The cam is provided with a plurality of air-conditioning elements, and the cam is provided with a plurality of air-conditioning elements, and the cam is provided with a plurality of air-conditioning elements, and the cam is provided with a plurality of air-conditioning elements.

[0005] Furthermore, an injection needle tube connected to the upper mold cavity is provided on the upper mold plate, and the plastic raw material is injected into the upper mold cavity through the injection needle tube.

[0006] Furthermore, the pressure storage assembly includes a sealing plate, a second spring and a rebound block. The rebound block is tightly attached to the inner wall of the transverse hole. The rebound block is connected to the sealing plate through the second spring. The sealing plate is fixed on the lower template and blocks the transverse hole.

[0007] When the piston block compresses the air, the rebound block is pushed by the air to move toward the sealing plate, and the second spring is compressed.

[0008] Furthermore, one side of the driver block is connected to the telescopic rod of the ejection cylinder. The ejection cylinder drives the telescopic rod up and down, driving the driver block. When the driver block reaches its lowest point, it abuts against the stop plate, securing the ejection plate firmly within the slot. The driver block then moves upward, abutting against the driven block, pushing the sleeve upward, causing the sealing lift plate to squeeze the air out of the ejection hole.

[0009] Furthermore, a sealing ring is provided on the edge of the sealing lifting plate.

[0010] The injection molding machine drives the upper and lower mold plates to close together. The piston rod descends along the piston groove, compressing the air in the piston groove into the bottom and transverse holes, compressing the pressure accumulator. After injection is complete, the electric valve opens, and with the rebound of the pressure accumulator, air enters the ejection hole through the air supply duct and heat dissipation channel. Since the heat dissipation channel is close to the lower mold cavity, it removes heat. Once the hot air enters the heat dissipation channel, it pushes the sleeve downward, compressing the first spring. At this point, the electric valve closes. After the automotive interior part cools and sets, the injection molding machine is driven to open a short distance, and then the ejection cylinder is driven to move the sleeve upward, squeezing the air in the ejection hole upward. Finally, the compressed air pushes the ejector plate out of the slot. The electric valve is then opened again, allowing the piston block to move up faster and easier. Because compressed air is used to compress the ejector plate, the thrust on the ejector plate increases gradually, and the ejection force on the automotive interior part also increases slowly and gradually. This effectively protects the product and prevents deformation and damage caused by the strong ejection force of the ejector rod.

[0011] Compared with the existing technology, this gas-assisted automotive interior parts injection mold has the following advantages:

[0012] 1. By closing the mold, the piston block sinks and compresses the air in the piston groove into the bottom and transverse holes. The air is then pushed into the heat dissipation channel and the ejection hole through the pressure accumulator component. Finally, the sleeve is used to compress the air and squeeze the ejection plate to eject the product. Therefore, this injection mold uses air-assisted demoulding to better protect the product and avoid damage caused by violent ejection.

[0013] 2. After passing through the heat dissipation channel, the air can take away the heat from the lower template, use the sleeve to conduct heat, and finally dissipate the heat to the outside through the lower end of the sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1This is a cross-sectional view of the gas-assisted injection mold for automotive interior parts.

[0015] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0016] In the figure, 1. upper template; 2. lower template; 3. mold core; 4. side ear plate; 5. piston groove; 6. piston rod; 7. piston block; 8. upper mold cavity; 9. lower mold cavity; 10. transverse hole; 11. pressure accumulator assembly; 111. sealing plate; 112. second spring; 113. rebound block; 12. ejection hole; 13. ejection rod; 14. ejection plate; 15. heat dissipation channel; 16. air supply duct; 17. electric valve; 18. sleeve; 19. sealing lifting plate; 20. plug; 21. driven block; 22. limit plate; 23. drive block; 24. first spring; 25. injection needle; 26. telescopic rod; 27. sealing ring. DETAILED DESCRIPTION

[0017] 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.

[0018] like Figure 1 As shown, the gas-assisted injection mold for automobile interior parts includes an upper mold plate 1, a lower mold plate 2 and a mold core 3. Side ear plates 4 are fixed on both sides of the upper mold plate 1, a vertically arranged piston groove 5 is opened on the lower mold plate 2, a vertically arranged piston rod 6 is fixed on the side ear plate 4, and the lower end of the piston rod 6 has a piston block 7 located in the piston groove 5 and sliding up and down along the piston groove 5. The lower end surface of the upper mold plate 1 is opened with an inwardly concave upper mold cavity 8, the upper end center of the lower mold plate 2 is opened with a lower mold cavity 9, the mold core 3 is fixed in the lower mold cavity 9, and the bottom of the piston groove 5 is provided with a piston block 7 located in the piston groove 5 and sliding up and down along the piston groove 5. A transverse hole 10 is opened horizontally, and a pressure accumulation component 11 is arranged in the transverse hole 10. A through-hole 12 is opened in the center of the mold core 3 and the lower template 2, and a ejection rod 13 is provided in the ejection hole 12. The upper end of the ejection rod 13 is fixed with a ejection plate 14 embedded in the embedding groove of the lower template 2. A heat dissipation channel 15 is opened in the lower template 2, and one end of the heat dissipation channel 15 is connected with the bottom of the piston groove 5 through the air supply duct 16, and the other end of the heat dissipation channel 15 is connected with the ejection hole 12, and an electric valve 17 for controlling the opening and closing of the air supply duct 16 is installed in the air supply duct 16.

[0019] The ejector rod is covered with a sleeve 18 that slides along the ejector rod. The upper end of the sleeve 18 is provided with a horizontally expanded sealing lifting plate 19 that fits the inner wall of the ejector hole 12. The edge of the sealing lifting plate 19 is covered with a sealing ring 27. The lower end of the ejector hole 12 is threadedly connected to a plug 20. The ejector rod 13 and the lower end of the sleeve 18 both pass through the plug 20. The lower end of the sleeve 18 is connected to a driven block 21. After the lower end of the ejector rod 13 passes through the sleeve 18, it is connected to a limit plate 22. A driving block 23 is provided between the limit plate 22 and the driven block 21. The driving block 23 is sleeved on the ejector rod 13 and slides up and down along the ejector rod 13. The sleeve 18 is covered with a first spring 24. The upper end of the first spring 24 abuts against the sealing lifting plate 19, and the lower end of the first spring 24 abuts against the plug 20.

[0020] The upper mold plate 1 is provided with an injection needle 25 which is in communication with the upper mold cavity 8. Plastic raw material is injected into the upper mold cavity 8 from the injection needle 25.

[0021] like Figure 2 As shown, the pressure accumulator assembly 11 includes a sealing plate 111, a second spring 112, and a rebound block 113. The rebound block 113 is in close contact with the inner wall of the transverse hole 10. The rebound block 113 is connected to the sealing plate 111 via the second spring 112. The sealing plate 111 is fixed to the lower mold plate 2 and blocks the transverse hole 10. When the piston block 7 compresses air, the rebound block 113 is pushed by the air toward the sealing plate 111, and the second spring 112 is compressed.

[0022] One side of the driver block 23 is connected to the telescopic rod 26 of the ejection cylinder. The ejection cylinder drives the telescopic rod 26 up and down, which in turn moves the driver block 23. The driver block 23 moves down to its lowest point, where it abuts against the stop plate 22, securing the ejection plate 14 firmly within the slot. The driver block 23 then moves up to abut against the driven block 21, pushing the sleeve 18 upward, causing the sealing lift plate 19 to squeeze the air out of the ejection hole 12.

[0023] Working process: The injection molding machine drives the upper mold plate 1 and the lower mold plate 2 to close the mold, and the piston rod 6 sinks along the piston groove 5. The air in the piston groove 5 is compressed to the bottom and the transverse hole 10, and the pressure accumulation component 11 is compressed. After the injection molding is completed, the electric valve 17 is opened. With the rebound of the pressure accumulation component 11, the air enters the ejection hole 12 from the air supply duct 16 and the heat dissipation channel 15. Since the heat dissipation channel 15 is close to the lower mold cavity 9, the heat is taken away. After the hot air enters the heat dissipation channel 15, it will push the sleeve 18 to sink, causing the first spring 24 to be compressed. At this time, the electric valve 17 is closed. After the automobile interior parts are cooled and shaped, the injection molding machine is driven to open a short distance, and then the ejection cylinder is driven to drive the sleeve 18 to move upward, squeezing the air in the ejection hole 12 upward, and finally the compressed air pushes the ejection plate 14 out of the groove, and then the electric valve 17 is opened to make the piston block 7 move up faster and easier. Since compressed air is used to squeeze the ejector plate 14, the thrust on the ejector plate 14 gradually increases, and the ejection force on the automotive interior parts also increases slowly and gradually. This can well protect the product and avoid deformation and damage of the product caused by the strong ejection force of the ejector rod 13.

[0024] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A gas-assisted injection mold for automobile interior parts, comprising an upper mold plate, a lower mold plate and a mold core, characterized in that: Side ear plates are fixed on both sides of the upper template, a vertically arranged piston groove is opened on the lower template, a vertically arranged piston rod is fixed on the side ear plates, the lower end of the piston rod has a piston block located in the piston groove and sliding up and down along the piston groove, the lower end surface of the upper template is provided with an inward-concave upper mold cavity, the upper end center of the lower template is provided with a lower mold cavity, the mold core is fixed in the lower mold cavity, a transverse hole is opened horizontally at the bottom of the piston groove, a pressure storage component is provided in the transverse hole, a through-hole is opened between the mold core and the center of the lower template, a ejection hole is provided in the ejection hole, and a ejection rod is fixed on the upper end of the ejection rod with an ejection plate embedded in the embedding groove of the lower template, a heat dissipation channel is opened in the lower template, and one end of the heat dissipation channel is connected to the bottom of the piston groove through the air supply duct The top of the cylinder is connected to the air conditioning tube, and the other end of the heat dissipation channel is connected to the ejecting hole. An electric valve for controlling the opening and closing of the air supply duct is installed in the air supply duct. The outer sleeve of the ejector rod is provided with a sleeve that slides along the ejector rod. The upper end of the sleeve is provided with a sealing lifting plate that is horizontally expanded and fits with the inner wall of the ejecting hole. The lower end of the ejecting hole is threadedly connected with a plug. The ejecting rod and the lower ends of the sleeve both pass through the plug. The lower end of the sleeve is connected with a driven block. After the lower end of the ejecting rod passes through the sleeve, it is connected to a limiting plate. A driving block is provided between the limiting plate and the driven block. The driving block is sleeved on the ejecting rod and slides up and down along the ejecting rod. The outer sleeve is provided with a first spring, the upper end of the first spring abuts against the sealing lifting plate, and the lower end of the first spring abuts against the plug.

2. The gas-assisted injection mold for automobile interior parts according to claim 1, characterized in that: The upper mold plate is provided with an injection needle tube communicating with the upper mold cavity.

3. The gas-assisted automobile interior trim injection mold according to claim 1, characterized in that: The pressure accumulator assembly includes a sealing plate, a second spring and a rebound block. The rebound block is in close contact with the inner wall of the transverse hole. The rebound block is connected to the sealing plate through the second spring. The sealing plate is fixed on the lower template and blocks the transverse hole.

4. The gas-assisted injection mold for automobile interior parts according to claim 1, characterized in that: One side of the driving block is connected to the telescopic rod of the ejection cylinder, and the ejection cylinder drives the telescopic rod to move up and down, driving the driving block to move.

5. The gas-assisted automobile interior trim injection mold according to claim 1, characterized in that: A sealing ring is sleeved on the edge of the sealing lifting plate.

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