Injection mold for processing valve chamber cover using waste plastic

Abstract

The application relates to the technical field of cover injection molding, and discloses a valve chamber cover processing injection mold using waste plastics, which comprises a bottom plate, the upper surface of the bottom plate is fixedly connected with a lower mold frame, the rear side of the lower mold frame is fixedly connected with an elevator, the front side of the elevator is slidably connected with an upper mold frame, the bottom inner surface of the upper mold frame is fixedly connected with an upper mold core, the top inner surface of the lower mold frame is fixedly connected with a lower mold core, and the moving end of the elevator is fixedly connected with a machine top. In the application, the stirring plate forcibly stirs and shears the plastic melt in the melting tank, breaks the unmelted lumps or the uneven viscosity areas possibly existing in the waste recycled materials, improves the processing quality of the materials, the grid plate can finely cut the plastic melt when reciprocating, and the uneven viscosity of the plastic melt is further avoided, so that the processing quality is improved.

Description

Technical Field

[0001] This invention relates to the field of valve cover injection molding technology, specifically to an injection mold for processing valve chamber covers using waste plastic. Background Technology

[0002] Currently, valve cover is mostly made of new plastic injection molding, which consumes a lot of resources. Due to differences in performance parameters, the direct use of waste plastic in existing molds can easily lead to insufficient product strength, dimensional instability, and surface defects, thus limiting its high-value application in precision automotive parts.

[0003] Patent CN117183223A discloses an injection mold for processing a plastic valve chamber cover. This patent includes a lower mold component, a stamping component fixedly connected to the side of the lower mold component, and an upper mold component fixedly connected to the bottom of the stamping component. The upper mold component is located above the lower mold component. A cooling component is slidably connected to the inner wall of the upper mold component, rapidly cooling the interior of the upper mold component. A cleaning component is fixedly connected to the bottom of the cooling component, cleaning the interior of the upper mold component. A ventilation component is fixedly connected to the side of the upper mold component away from the cooling component. A heating component is fixedly connected to the top of the component. The stamping component drives the upper mold component and the lower mold component to close and demold. The cooling component uses water cooling to cool the mold during mold closing. The cleaning component cleans the residual cooling water inside the upper mold after the workpiece has solidified. Although this patent solves the above problems, it is still difficult to process and inject low-strength waste plastics. The processing quality is not high, and there are problems such as air bubbles being generated in the mold cavity during injection and material deformation due to untimely cooling. Therefore, a valve chamber cover made of waste plastic is proposed to solve the above problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an injection mold for processing valve cover using waste plastic, which addresses the shortcomings of the prior art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a valve chamber cover processing injection mold using waste plastic, comprising: A base plate, a lower mold frame is fixedly connected to the upper surface of the base plate, a lifting mechanism is fixedly connected to the rear side of the lower mold frame, an upper mold frame is slidably connected to the front side of the lifting mechanism, an upper mold core is fixedly connected to the bottom inner surface of the upper mold frame, a lower mold core is fixedly connected to the top inner surface of the lower mold frame, and an upper top is fixedly connected to the moving end of the lifting mechanism. A sealing device is provided above the base plate and is used to seal the upper mold frame and the lower mold core. A cooling device is installed below the top of the machine and is used to improve the cooling efficiency of the molded plastic.

[0006] As a further technical solution, the lower mold frame includes: A support column is fixedly connected to the upper surface of the upper mold frame; A melting vessel, which is fixedly connected to the upper surface of the upper mold frame; A reciprocating lead screw is rotatably connected to the lower surface of the machine top. A rotating shaft is fixedly connected to the bottom end of the reciprocating lead screw, and an agitator plate is fixedly connected to the circumferential surface of the rotating shaft.

[0007] As a further technical solution, the lower mold frame also includes: A through groove is formed inside the agitator plate, and a radial slide rod is slidably connected to the inner surface of the through groove; A grid plate is fixedly connected to both sides of the circumferential surface of a radial slide bar, and a top plate is fixedly connected to the side of the grid plate near the inner wall of the melting tank. An arc-shaped protrusion is fixedly connected to the inner wall of the melting tank.

[0008] As a further technical solution, the top of the support column is fixedly connected to the lower surface of the machine top, the grid plate and the side surface of the stirring plate are slidably connected, the end of the top plate away from the grid plate abuts against the arc-shaped protrusion, an elastic telescopic rod is provided between the radial slide rod and the rotating shaft, the rotating shaft is rotatably connected to the inner wall of the top of the melting tank, and an injection valve is provided between the melting tank and the lower mold frame.

[0009] As a further technical solution, the sealing device includes: A vacuum pump is fixedly connected to the inner surface of the base plate, and an exhaust pipe is fixedly connected to the circumferential surface of the vacuum pump. Positioning guide post, which is fixedly connected to the upper surface of the lower mold frame; Positioning guide sleeve, which is fixedly connected to the inner surface of the upper mold frame; A sealing gasket is fixedly connected to the upper surface of the lower mold frame.

[0010] As a further technical solution, the sealing device also includes: A sliding sleeve is fixedly connected to the inner surface of the top of the sealing gasket, and a sealing plug is slidably connected to the inner surface of the sliding sleeve. A lifting frame is threadedly connected to the circumferential surface of a reciprocating lead screw. Axial slide rods are fixedly connected to both ends of the lower surface of the lifting frame, and a pressure shaft is fixedly connected to the bottom end of the axial slide rods. Support shafts are fixedly connected to both sides of the melting tank.

[0011] As a further technical solution, the vacuum pump is fixedly connected to the inner surface of the lower mold frame, the exhaust pipe is movably connected to the inner surface of the lower mold frame, the positioning guide post is slidably connected to the inner surface of the positioning guide sleeve, the top end of the exhaust pipe is movably connected to the bottom of the sealing gasket, the axial slide rod is slidably connected to the inner surface of the support shaft, and the axial slide rod is slidably connected to the inner surface of the upper mold frame.

[0012] As a further technical solution, the cooling device includes: A heat exchange plate is snapped onto the inner surface of the lower mold frame, and a retainer is fixedly connected to the front end of the heat exchange plate. The flow pipe is fixedly connected to the inner surface of the rear side of the lower mold frame, and a pin is slidably connected to the inner surface of the flow pipe.

[0013] As a further technical solution, the cooling device also includes: U-shaped pressure plate, the U-shaped pressure plate is fixedly connected to the rear side of the pressure shaft; A card plate, which is fixedly connected to the rear side of the card holder; A positioning rod is slidably connected to the inner surface of the front side of the lower mold frame, and a pull plate is fixedly connected to the top end of the positioning rod.

[0014] As a further technical solution, the front end of the conveying pipe is engaged with the inner surface of the rear end of the heat exchange plate, a through hole is provided on the inner side of the pin, both ends of the clamping plate are fixedly connected to the heat exchange plate, a locking hole is provided on the inner side of the clamping plate, and the locking hole is engaged with the bottom end of the positioning rod, a spring is provided between the lower surface of the pull plate and the upper surface of the lower mold frame, and an elastic telescopic rod is provided between the bottom end of the positioning rod and the inner surface of the lower mold frame.

[0015] The present invention, by adopting the above technical solution, can bring the following beneficial effects: 1. This device uses valve chamber covers made from waste plastic to process injection molds. The stirring plate aligns the molten plastic in the melting tank and performs forced stirring and shearing, breaking up any unmelted lumps or areas of uneven viscosity that may exist in the recycled waste material, thus improving the processing quality of the material. During the continuous rotation of the device, the top plate moves back and forth due to the influence of the arc-shaped protrusion, which in turn drives the radial slide bar and grid plate to move back and forth. When the grid plate moves back and forth, it can perform finer segmentation and shearing of the molten plastic, further avoiding uneven viscosity of the molten plastic that would lead to a decline in processing quality.

[0016] 2. The injection mold is made using valve chamber covers made from waste plastic. A vacuum pump extracts the air between the lower and upper mold cores and discharges it through an exhaust pipe. Then, molten plastic is injected between the lower and upper mold cores. This effectively prevents air bubbles from forming during the molding process, thus avoiding defective products. It improves the yield rate of the material processing equipment and reduces material waste. The positioning guide pillars and positioning guide sleeves ensure that the upper and lower mold frames are completely aligned, preventing the lower and upper mold cores from shifting during molding and causing the material to be unqualified after molding.

[0017] 3. The injection mold is made from the valve chamber cover of waste plastic. After the lower mold core and the upper mold core are closed, the gap between them is blocked by a sealing gasket. The sealing gasket can prevent external gas from entering the mold cavity, and further prevent air bubbles from being generated during material molding. The air discharged through the exhaust pipe flows upward into the sealing gasket, causing the sealing gasket to expand, thereby completely fitting and filling the gap between the lower mold core and the upper mold core, improving the sealing effect of the sealing gasket. The bottom end of the sealing plug is inserted into the connection between the exhaust pipe and the sealing gasket, thereby sealing the sealing gasket and preventing air leakage, further improving the sealing effect.

[0018] 4. The valve chamber cover made from waste plastic is used to process the injection mold. When the through hole on the pin is aligned with the axial direction of the delivery pipe, the cold flow can flow into the heat exchange plate through the through hole. When the U-shaped pressure plate rises away from the pin, the pin slides upward and resets under the influence of the elastic telescopic rod at the bottom of the air pipe, thereby blocking the delivery pipe and preventing liquid leakage before the device is connected.

[0019] 5. The valve chamber cover made from waste plastic is used to process the injection mold. After the clamping plate is inserted into the lower mold frame, the pull plate is released. At this time, the pull plate moves downward due to the elastic reset effect of the spring and drives the positioning rod to move downward and insert into the locking hole opened on the clamping plate, locking the heat exchange plate in the lower mold frame, thus improving the stability of the device during cooling. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a three-dimensional half-section diagram of the front side of the lower mold frame of the present invention; Figure 3 For the present invention Figure 2 A magnified structural diagram of A in the middle; Figure 4 This is a three-dimensional half-sectional view of the front side of the sealing device of the present invention; Figure 5 For the present invention Figure 4 A magnified structural diagram of B in the diagram; Figure 6 This is a three-dimensional half-sectional view of the rear side of the cooling device of the present invention; Figure 7 For the present invention Figure 6 A magnified structural diagram of C; Figure 8 This is a three-dimensional structural diagram of the rear side of the heat exchange plate of the present invention; Figure 9 For the present invention Figure 8 A magnified structural diagram of D in the diagram.

[0021] In the diagram: 1. Base plate; 2. Lower mold frame; 3. Lifting machine; 4. Upper mold frame; 5. Lower mold core; 6. Upper mold core; 7. Machine top; 8. Sealing device; 9. Cooling device; 10. Support column; 11. Melting tank; 12. Reciprocating screw; 13. Rotating shaft; 14. Stirring plate; 15. Through groove; 16. Radial slide bar; 17. Grid plate; 18. Top plate; 19. Arc-shaped protrusion; 81. Vacuum pump; 82. Positioning guide post; 83. Positioning guide sleeve; 84. Sealing gasket; 85. Exhaust pipe; 86. Sliding sleeve; 87. Sealing plug; 88. Lifting frame; 89. Axial slide bar; 810. Support shaft; 811. Pressure shaft; 91. Heat exchange plate; 92. Card seat; 93. Flow pipe; 94. Pin; 95. U-shaped pressure plate; 96. Card plate; 97. Positioning rod; 98. Pull plate. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figures 1-9One embodiment of the present invention is as follows: an injection mold for processing valve chamber covers using waste plastic, comprising a base plate 1, a lower mold frame 2 fixedly connected to the upper surface of the base plate 1, a lifting mechanism 3 fixedly connected to the rear side of the lower mold frame 2, an upper mold frame 4 slidably connected to the front side of the lifting mechanism 3, an upper mold core 6 fixedly connected to the bottom inner surface of the upper mold frame 4, a lower mold core 5 fixedly connected to the top inner surface of the lower mold frame 2, a top 7 fixedly connected to the moving end of the lifting mechanism 3, and a sealing device 8 disposed above the base plate 1, the sealing device 8 being used to seal the upper mold frame 4 and the lower mold core 5. A sealing and cooling device 9 is located below the top of the machine 7. The cooling device 9 is used to improve the cooling efficiency of the molded plastic. The stirring plate 14 aligns the plastic melt in the melting tank 11 and performs forced stirring and shearing to break up any unmelted lumps or areas of uneven viscosity that may exist in the waste recycled material, thereby improving the processing quality of the material. The lower mold frame 2 includes a support column 10, which is fixedly connected to the upper surface of the upper mold frame 4. The melting tank 11 is fixedly connected to the upper surface of the upper mold frame 4. The reciprocating screw 12 is rotatably connected to the lower surface of the top of the machine 7, and the bottom end of the reciprocating screw 12 is fixed. A rotating shaft 13 is connected, and an agitator 14 is fixedly connected to the circumferential surface of the rotating shaft 13. The lower mold frame 2 also includes a through groove 15, which is opened inside the agitator 14. A radial slide rod 16 is slidably connected to the inner surface of the through groove 15. A grid plate 17 is fixedly connected to both sides of the circumferential surface of the radial slide rod 16. A top plate 18 is fixedly connected to the side of the grid plate 17 near the inner wall of the melting tank 11. An arc-shaped protrusion 19 is fixedly connected to the inner wall of the melting tank 11. The top of the support column 10 is fixedly connected to the lower surface of the machine top 7. The grid plate 17 and the side surface of the agitator 14 are slidably connected. The top plate 18... The end of the top plate 18 away from the grid plate 17 abuts against the arc-shaped protrusion 19. An elastic telescopic rod is provided between the radial slide rod 16 and the rotating shaft 13. The rotating shaft 13 is rotatably connected to the inner wall of the top of the melting tank 11. An injection valve is provided between the melting tank 11 and the lower mold frame 2. During the continuous rotation of the device, the top plate 18 moves back and forth due to the influence of the arc-shaped protrusion 19, which in turn drives the radial slide rod 16 and the grid plate 17 to move back and forth. When the grid plate 17 moves back and forth, it can perform finer segmentation and shearing of the molten plastic, further avoiding uneven viscosity of the plastic melt, which would lead to a decrease in processing quality.

[0024] Working Principle: The lifting platform 3 is activated, causing the top of the machine 7 to descend. The top of the machine 7, via the support column 10, lowers the upper mold frame 4. The upper mold frame 4 then lowers the upper mold core 6, which connects with and closes with the lower mold core 5. The molten plastic is then injected through the injection valve at the top of the upper mold core 6 into the space between the upper mold core 6 and the lower mold core 5, filling and molding the plastic. After the plastic cools, the lifting platform 3 is activated again, causing the top of the machine 7 to rise. The top of the machine 7, via the support column 10, then raises and separates the upper mold frame 4 and the upper mold core 6, completing the injection molding process. Before the molten plastic is injected into the lower mold core 5 and the upper mold core 6, the built-in motor of the top of the machine 7 is activated. This motor drives the reciprocating screw 12 to rotate, which in turn drives the rotating shaft 13. The rotating shaft 13 drives the agitator plate 14 to rotate circumferentially. The agitator plate 14 aligns the molten plastic in the melting tank 11, performing forced stirring and shearing to break up any unmelted lumps or areas of uneven viscosity that may exist in the recycled waste material, thus improving the efficiency of the process. To improve the processing quality of the material, when the stirring plate 14 rotates, it drives the radial slide rod 16 to rotate circumferentially. The radial slide rod 16 then drives the grid plate 17 and the top plate 18 to rotate circumferentially. When the arc-shaped end of the top plate 18 contacts the arc-shaped protrusion 19, the top plate 18 moves closer to the rotating shaft 13 due to the influence of the arc surface, and drives the grid plate 17 to move closer to the rotating shaft 13. The grid plate 17 then drives the radial slide rod 16 to slide closer to the rotating shaft 13 in the through groove 15. When the top plate 18 moves away from the arc-shaped protrusion 19, the grid plate 17 and the radial slide rod 16 lose contact, and thus move in the opposite direction due to the elastic force of the elastic telescopic rod between the grid plate 17 and the rotating shaft 13. Thus, during the continuous rotation of the device, the top plate 18 moves back and forth due to the influence of the arc-shaped protrusion 19, which in turn drives the radial slide rod 16 and the grid plate 17 to move back and forth. When the grid plate 17 moves back and forth, it can perform finer segmentation and shearing of the molten plastic, further avoiding uneven viscosity of the plastic melt, which would lead to a decrease in processing quality.

[0025] Please see Figures 1-9Based on the above embodiments, in another embodiment of the present invention, the sealing device 8 includes a vacuum pump 81, which is fixedly connected to the inner surface of the base plate 1. An exhaust pipe 85 is fixedly connected to the circumferential surface of the vacuum pump 81. A positioning guide post 82 is fixedly connected to the upper surface of the lower mold base 2, a positioning guide sleeve 83 is fixedly connected to the inner surface of the upper mold base 4, and a sealing gasket 84 is fixedly connected to the upper surface of the lower mold base 2. The vacuum pump 81 extracts the air between the lower mold core 5 and the upper mold core 6, and then discharges it through the exhaust pipe 85. At this time, molten plastic is injected into the space between the lower mold core 5 and the upper mold core 6. In this process, air bubbles can be effectively avoided from forming defective products, thus improving the yield rate of material processing and reducing material waste. The positioning guide post 82 and positioning guide sleeve 83 ensure complete alignment of the upper mold frame 4 and lower mold frame 2, preventing misalignment between the lower mold core 5 and upper mold core 6 during molding, which could lead to defective materials. The sealing device 8 also includes a sliding sleeve 86, which is fixedly connected to the inner surface of the top of the sealing gasket 84. A sealing plug 87 is slidably connected to the inner surface of the sliding sleeve 86. The lifting frame 88 is threadedly connected to the reciprocating screw 12. On the periphery, axial slide rods 89 are fixedly connected to both ends of the lower surface of the lifting frame 88, and pressure shafts 811 are fixedly connected to the bottom ends of the axial slide rods 89. Support shafts 810 are fixedly connected to both sides of the melting tank 11. Vacuum pump 81 is fixedly connected to the inner surface of the lower mold frame 2. Exhaust pipe 85 is movably connected to the inner surface of the lower mold frame 2. Positioning guide post 82 is slidably connected to the inner surface of the positioning guide sleeve 83. The top end of exhaust pipe 85 is movably connected to the bottom of sealing gasket 84. Axial slide rods 89 are slidably connected to the inner surface of support shaft 810. Axial slide rods 89 are slidably connected to the inner surface of upper mold frame 4. Lower mold core After the lower mold core 5 and the upper mold core 6 are closed, the gap between them is blocked by the sealing gasket 84. The sealing gasket 84 can prevent external gas from entering the mold cavity, and further prevent the generation of air bubbles during material molding. The air discharged through the vent pipe 85 flows upward into the sealing gasket 84, causing the sealing gasket 84 to expand, thereby completely fitting and filling the gap between the lower mold core 5 and the upper mold core 6, improving the sealing effect of the sealing gasket 84. The bottom end of the sealing plug 87 is inserted into the connection between the vent pipe 85 and the sealing gasket 84, thereby sealing the sealing gasket 84 and preventing it from leaking air, further improving the sealing effect.

[0026] Working principle: After the lower mold core 5 and the upper mold core 6 are closed, the vacuum pump 81 is started. The vacuum pump 81 extracts the air between the lower mold core 5 and the upper mold core 6, and then discharges it through the exhaust pipe 85. At this time, the molten plastic is injected between the lower mold core 5 and the upper mold core 6. This effectively avoids the formation of air bubbles in the material during the forming process, thus preventing defective products. This improves the yield rate of the material processing and reduces material waste. During the descent of the upper mold frame 4, the positioning guide sleeve 83 descends and is inserted into the positioning guide post 82. Through the positioning of the positioning guide post 82 and the positioning guide sleeve 83, the upper mold frame 4 and the lower mold frame 2 are completely aligned, preventing the lower mold core 5 and the upper mold core 6 from shifting during molding, which would result in defective material after forming. After the lower mold core 5 and the upper mold core 6 are closed, the gap between them is blocked by the sealing gasket 84. The sealing gasket 84 can... This prevents external gas from entering the mold cavity, further preventing air bubbles from forming during material molding. The air discharged through the vent pipe 85 flows upward into the sealing gasket 84, causing the sealing gasket 84 to expand and completely fit and fill the gap between the lower mold core 5 and the upper mold core 6, improving the sealing effect of the sealing gasket 84. At the same time as the gas flows into the sealing gasket 84, the reciprocating screw 12 rotates, driving the lifting frame 88 to descend. The lifting frame 88 drives the axial slide rod 89 to slide and descend within the support shaft 810 and the lower mold frame 2. The axial slide rod 89 then drives the pressure shaft 811 to descend. After the pressure shaft 811 contacts the sealing plug 87, it pushes it to slide and descend within the sliding sleeve 86. Finally, the bottom end of the sealing plug 87 is inserted into the connection between the vent pipe 85 and the sealing gasket 84, thereby sealing the sealing gasket 84 and preventing air leakage, further improving the sealing effect.

[0027] Please see Figures 1-9Based on the above embodiments, in another embodiment of the present invention, the cooling device 9 includes a heat exchange plate 91, which is snapped onto the inner surface of the lower mold frame 2. A retaining seat 92 is fixedly connected to the front end of the heat exchange plate 91. A flow pipe 93 is fixedly connected to the inner rear surface of the lower mold frame 2. A pin 94 is slidably connected to the inner surface of the flow pipe 93. When the through hole on the pin 94 is axially aligned with the flow pipe 93, cold flow can flow into the heat exchange plate 91 through the through hole. When the U-shaped pressure plate 95 rises away from the pin 94, the pin 94 slides upward and resets due to the elastic telescopic rod at its bottom end, thereby sealing the flow pipe 93 and preventing leakage before the device is connected. The cooling device 9 also includes a U-shaped pressure plate 95, which is fixedly connected to the rear side of the pressure shaft 811. A retaining plate 96 is fixedly connected to the rear side of the retaining seat 92. The positioning rod 97 is slidably connected to the inner surface of the front side of the lower mold frame 2. The top of the positioning rod 97 is fixedly connected to the pull plate 98. The front end of the conveying pipe 93 is engaged with the inner surface of the rear end of the heat exchange plate 91. The inner side of the pin rod 94 has a through hole. The two ends of the clamping plate 96 are fixedly connected to the heat exchange plate 91. The inner side of the clamping plate 96 has a locking hole, which is engaged with the bottom end of the positioning rod 97. A spring is provided between the lower surface of the pull plate 98 and the upper surface of the lower mold frame 2. An elastic telescopic rod is provided between the bottom end of the positioning rod 97 and the inner surface of the lower mold frame 2. When the clamping plate 96 is inserted into the lower mold frame 2, the pull plate 98 is released. At this time, the pull plate 98 moves downward under the influence of the elastic reset action of the spring and drives the positioning rod 97 to move downward and insert into the locking hole on the clamping plate 96, locking the heat exchange plate 91 in the lower mold frame 2, thus improving the stability of the device during cooling.

[0028] Working principle: During the injection molding process, the heat exchange plate 91 is inserted into the lower mold base 2 through the retainer 92. At this time, the heat exchange plate 91 is located below the lower mold core 5. After the heat exchange plate 91 is inserted into the lower mold base 2, its rear end is connected to the flow pipe 93. At this time, cold air is delivered into the heat exchange plate 91 through the flow pipe 93, thereby absorbing the heat of the plastic and the mold, ensuring rapid product shaping and reducing deformation. After the cold air absorbs the heat, it can recover residual heat, reducing the overall energy consumption during production. When the pressure shaft 811 descends, it drives the U-shaped pressure plate 95 to descend. After the U-shaped pressure plate 95 contacts the pin 94, it pushes it to slide downward in the lower mold base 2. When the through hole on the pin 94 is axially aligned with the flow pipe 93, the cold air can flow into the heat exchange plate 91 through the through hole. When the U-shaped pressure plate 95 rises away from the pin 94, the pin 94 slides upward and resets under the influence of the elastic telescopic rod at the bottom of the air chamber, thereby sealing the delivery pipe 93 to prevent leakage before the device is connected. The clamping seat 92 drives the heat exchange plate 91 to insert into the lower mold frame 2, and at the same time drives the clamping plate 96 to insert into the lower mold frame 2. Before the clamping plate 96 is inserted into the lower mold frame 2, the pull plate 98 is pulled upward. The pull plate 98 drives the positioning rod 97 to slide upward, and at the same time drives the spring to extend upward. When the clamping plate 96 is inserted into the lower mold frame 2, the pull plate 98 is released. At this time, the pull plate 98 moves downward under the influence of the elastic reset action of the spring and drives the positioning rod 97 to move downward and insert into the locking hole opened on the clamping plate 96, locking the heat exchange plate 91 in the lower mold frame 2, thus improving the stability of the device during cooling.

[0029] This invention provides a method for processing valve cover injection molds using waste plastic. Many methods and approaches exist for implementing this technical solution; the above description is merely a preferred embodiment. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications should also be considered within the scope of protection of this invention. All components not explicitly stated in this embodiment can be implemented using existing technologies.

Claims

1. An injection mold for processing valve chamber covers using waste plastic, characterized in that, include: A base plate (1) is fixedly connected to a lower mold frame (2) on its upper surface. A lifting machine (3) is fixedly connected to the rear side of the lower mold frame (2). An upper mold frame (4) is slidably connected to the front side of the lifting machine (3). An upper mold core (6) is fixedly connected to the bottom inner surface of the upper mold frame (4). A lower mold core (5) is fixedly connected to the top inner surface of the lower mold frame (2). An organic top (7) is fixedly connected to the moving end of the lifting machine (3). A sealing device (8) is provided above the base plate (1) and is used to seal the upper mold frame (4) and the lower mold core (5); Cooling device (9) is located below the top of the machine (7) and is used to improve the cooling efficiency of the molded plastic.

2. The injection mold for processing valve chamber covers using waste plastic as described in claim 1, characterized in that: The lower mold frame (2) includes: The support column (10) is fixedly connected to the upper surface of the upper mold frame (4); Melting vessel (11), which is fixedly connected to the upper surface of the upper mold frame (4); A reciprocating lead screw (12) is rotatably connected to the lower surface of the machine top (7). A rotating shaft (13) is fixedly connected to the bottom end of the reciprocating lead screw (12), and an agitator plate (14) is fixedly connected to the circumferential surface of the rotating shaft (13).

3. The injection mold for processing valve chamber covers using waste plastic as described in claim 2, characterized in that: The lower mold frame (2) also includes: A through groove (15) is formed inside the stirring plate (14), and a radial slide rod (16) is slidably connected to the inner surface of the through groove (15). A grid plate (17) is fixedly connected to both sides of the circumferential surface of the radial slide bar (16), and a top plate (18) is fixedly connected to the side of the grid plate (17) near the inner wall of the melting tank (11). Arc-shaped protrusion (19) is fixedly connected to the inner wall of the melting tank (11).

4. The injection mold for processing valve chamber covers using waste plastic as described in claim 3, characterized in that: The top of the support column (10) is fixedly connected to the lower surface of the machine top (7), the side surfaces of the grid plate (17) and the stirring plate (14) are slidably connected, the end of the top plate (18) away from the grid plate (17) abuts against the arc-shaped protrusion (19), an elastic telescopic rod is provided between the radial slide rod (16) and the rotating shaft (13), the rotating shaft (13) is rotatably connected to the inner wall of the top of the melting tank (11), and an injection valve is provided between the melting tank (11) and the lower mold frame (2).

5. The injection mold for processing valve chamber covers using waste plastic as described in claim 4, characterized in that: The sealing device (8) includes: A vacuum pump (81) is fixedly connected to the inner surface of the base plate (1), and an exhaust pipe (85) is fixedly connected to the circumferential surface of the vacuum pump (81). Positioning guide post (82), the positioning guide post (82) is fixedly connected to the upper surface of the lower mold frame (2); Positioning guide sleeve (83), which is fixedly connected to the inner surface of the upper mold frame (4); A sealing gasket (84) is fixedly connected to the upper surface of the lower mold frame (2).

6. The injection mold for processing valve chamber covers using waste plastic as described in claim 5, characterized in that: The sealing device (8) further includes: A sliding sleeve (86) is fixedly connected to the inner surface of the top of the sealing gasket (84), and a sealing plug (87) is slidably connected to the inner surface of the sliding sleeve (86). The lifting frame (88) is threadedly connected to the circumferential surface of the reciprocating screw (12). Axial slide rods (89) are fixedly connected to both ends of the lower surface of the lifting frame (88), and a pressure shaft (811) is fixedly connected to the bottom end of the axial slide rods (89). Support shaft (810) is fixedly connected to both sides of melting tank (11).

7. The injection mold for processing valve chamber covers using waste plastic as described in claim 6, characterized in that: The vacuum pump (81) is fixedly connected to the inner surface of the lower mold frame (2), the exhaust pipe (85) is movably connected to the inner surface of the lower mold frame (2), the positioning guide post (82) is slidably connected to the inner surface of the positioning guide sleeve (83), the top end of the exhaust pipe (85) is movably connected to the bottom of the sealing gasket (84), the axial slide rod (89) is slidably connected to the inner surface of the support shaft (810), and the axial slide rod (89) is slidably connected to the inner surface of the upper mold frame (4).

8. The injection mold for processing valve chamber covers using waste plastic as described in claim 7, characterized in that: The cooling device (9) includes: A heat exchange plate (91) is snapped onto the inner surface of the lower mold frame (2), and a card holder (92) is fixedly connected to the front end of the heat exchange plate (91). The flow pipe (93) is fixedly connected to the inner surface of the rear side of the lower mold frame (2), and the inner surface of the flow pipe (93) is slidably connected with a pin (94).

9. The injection mold for processing valve chamber covers using waste plastic as described in claim 8, characterized in that: The cooling device (9) further includes: U-shaped pressure plate (95), the U-shaped pressure plate (95) is fixedly connected to the rear side of the pressure shaft (811); Card plate (96), said card plate (96) is fixedly connected to the rear side of card holder (92); Positioning rod (97) is slidably connected to the inner surface of the front side of the lower mold frame (2), and a pull plate (98) is fixedly connected to the top of the positioning rod (97).

10. The injection mold for processing valve chamber covers using waste plastic according to claim 9, characterized in that: The front end of the flow pipe (93) is engaged with the inner surface of the rear end of the heat exchange plate (91). The inner side of the pin (94) is provided with a through hole. The two ends of the clamping plate (96) are fixedly connected to the heat exchange plate (91). The inner side of the clamping plate (96) is provided with a locking hole, and the locking hole is engaged with the bottom end of the positioning rod (97). A spring is provided between the lower surface of the pull plate (98) and the upper surface of the lower mold frame (2). An elastic telescopic rod is provided between the bottom end of the positioning rod (97) and the inner surface of the lower mold frame (2).

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