Injection demolding mold for plastic cement cylinder product

Abstract

The utility model provides a plastic cement cylinder product injection molding demolding mold which comprises a lower mold, synchronous hydraulic lifting rods arranged at four corners of the lower mold, an upper mold arranged at the tops of the synchronous hydraulic lifting rods, an injection molding pipe embedded in one side of the top of the upper mold, an injection molding opening formed in one side of the bottom of the upper mold, and the injection molding pipe is communicated with the injection molding opening in a sealed mode. Injection grooves are formed in the two sides of the bottom of the inner wall of the lower mold, synchronous electric telescopic rods are arranged on one sides of the inner walls of the injection grooves, special-shaped plugging blocks are arranged at one ends of the synchronous electric telescopic rods, liquid injection electromagnetic valves are embedded in the tops of the other sides of the inner walls of the injection grooves, and liquid drainage electromagnetic valves are embedded in the bottoms of the other sides of the inner walls of the injection grooves; according to the injection demolding mold for the plastic cement cylinder product, a cooling liquid containing substance is pumped into an injection groove through an injection flow dividing pipe, cooling liquid permeates into an injection part and a groove in the inner wall of a lower mold, so that the injection part is rapidly cooled and shaped and is separated from the inner wall of the lower mold, redundant cooling liquid is discharged through a discharging flow dividing pipe, and automatic demolding of the lower mold is completed.

Description

Technical Field

[0001] This utility model belongs to the field of plastic cylinder processing technology, specifically relating to an injection molding and demolding mold for plastic cement cylinder products. Background Technology

[0002] Existing injection molds suffer from poor demolding functionality. After injection molding is completed inside the mold, manual demolding is required, which is quite difficult. The "Injection Mold for Processing Plastic Trash Cans with Easy Demolding" disclosed in application number "CN202222024925.2" represents an increasingly mature technology. It utilizes pressure blocks to "press" the protruding edges of the upper mold base, resulting in tighter mold closing, higher trash can molding consistency, and easier subsequent demolding. The design is reasonable, safe, and provides better mold molding and easier demolding. However, this device still has the following drawbacks: in actual use, the plastic tends to stick to the inner wall of the lower mold, making demolding difficult, and when the upper mold is detached, the inner wall of the plastic cylinder tends to stick to the surface of the upper mold. Utility Model Content

[0003] The purpose of this utility model is to provide an injection molding and demolding mold for plastic cement cylinder products, which aims to solve the problems in the prior art where plastic easily sticks to the inner wall of the lower mold, making demolding inconvenient, and when the upper mold is removed, the inner wall of the plastic cylinder easily sticks to the surface of the upper mold.

[0004] To achieve the above objectives, this utility model provides the following technical solution: It includes a lower mold, with synchronous hydraulic lifting rods at its four corners, an upper mold at the top of the synchronous hydraulic lifting rods, an injection tube embedded on one side of the top of the upper mold, an injection port on one side of the bottom of the upper mold, the injection tube and the injection port being sealed and connected, injection grooves on both sides of the bottom of the lower mold's inner wall, a synchronous electric telescopic rod on one side of the inner wall of the injection groove, a shaped sealing block at one end of the synchronous electric telescopic rod, an injection solenoid valve embedded at the top of the other side of the injection groove's inner wall, a discharge solenoid valve embedded at the bottom of the other side of the injection groove's inner wall, a material distribution pipe on the top of one side of the lower mold, both ends of the material distribution pipe being sealed and connected to the injection solenoid valve, and a material discharge distribution pipe on the bottom of one side of the lower mold, both ends of the material discharge distribution pipe being sealed and connected to the material discharge solenoid valve.

[0005] In an embodiment of the injection molding demolding mold for plastic cement cylinder products of this utility model, a movable groove is provided at the bottom of the inner wall of the lower mold, a main electric telescopic push rod is provided at the bottom of the movable groove, and a main top plate is fixedly connected to the top of the main electric telescopic push rod.

[0006] In this scheme, after the upper and lower molds are combined, injection molding is performed through the injection tube. After injection molding is completed, the synchronous electric telescopic rod retracts the irregular sealing block, and the injection diversion pipe pumps the coolant into the injection tank. The coolant seeps into the groove of the injection part and the inner wall of the lower mold, so that the injection part cools and solidifies quickly and separates from the inner wall of the lower mold. At this time, the drain solenoid valve opens, and the excess coolant is discharged through the drain diversion pipe. At this time, the upper mold separates, and the main electric telescopic ejector rod extends the main ejector plate to eject the injection molded product.

[0007] In an embodiment of the injection molding demolding mold for plastic cement cylinder products of this utility model, auxiliary electric telescopic rods are provided on both sides of the bottom of the inner wall of the movable groove, and an auxiliary annular top plate is fixedly provided on the top of the auxiliary electric telescopic rods. A plurality of auxiliary protrusions are distributed on the top of the auxiliary annular top plate, and a plurality of insertion holes are distributed on the surface of the main top plate. The auxiliary protrusions are movably connected to the insertion holes.

[0008] In this solution, the extension and retraction of the auxiliary electric telescopic rod assists the annular top plate in moving up and down within the insertion hole, lifting the bottom of the injection molded part and separating the bottom of the injection molded part from the part that is adhered to the main top plate.

[0009] In an embodiment of the injection molding demolding mold for plastic cement cylinder products of this utility model, the lower mold is provided with guide frames on both sides, and the guide frames are provided with guide grooves on their inner sides. The upper mold is provided with guide blocks on both sides, and the guide blocks are slidably connected in the guide grooves.

[0010] In this solution, when the upper mold is moved by the synchronous hydraulic lifting rod, the guide block moves within the guide groove to guide the movement direction of the upper mold.

[0011] In an embodiment of the injection molding demolding mold for plastic cement cylinder products of this utility model, an air outlet groove is provided at the bottom of the upper mold, an air outlet pipe is embedded on one side of the bottom of the inner wall of the air outlet groove, and an air inlet valve is embedded on the other side of the top of the upper mold. The air inlet valve is sealed and connected to the air outlet pipe.

[0012] In this solution, after injection molding is completed, the upper electric telescopic ejector rod retracts the upper sealing block, and external cooling gas is blown into the air outlet groove through the air inlet valve to inflate the inner wall of the injection molded part, so that the injection molded part falls off from the outside of the upper mold.

[0013] In an embodiment of the injection molding demolding mold for plastic cement cylinder products of this utility model, an upper electric telescopic rod is provided at the top of the inner wall of the air outlet groove, and an upper sealing block is fixedly connected to the bottom of the upper electric telescopic rod.

[0014] In this solution, during the injection molding process, the upper electric telescopic ejector rod extends to block the upper sealing block, which blocks the venting groove to prevent the injection molding liquid from flowing into the venting groove.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1) The main electric telescopic ejector rod extends the main ejector plate to eject the injection molded product. The auxiliary electric telescopic rod extends and retracts to allow the auxiliary annular ejector plate to move up and down in the insertion hole, lifting the bottom of the injection molded part and separating the bottom of the injection molded part from the part that is stuck to the main ejector plate. After the injection is completed, the upper electric telescopic ejector rod retracts the upper sealing block. The air inlet valve blows external cooling gas into the air outlet groove and inflates the inner wall of the injection molded part, causing the injection molded part to fall off the outside of the upper mold, thus completing the automatic demolding of the upper mold.

[0017] 2) By retracting the irregular sealing block through the synchronous electric telescopic rod, the injection solenoid valve and the drainage solenoid valve are exposed. The injection diversion pipe pumps the coolant into the injection tank. The coolant seeps into the groove of the injection molded part and the inner wall of the lower mold, so that the injection molded part cools and solidifies quickly and separates from the inner wall of the lower mold. At this time, the drainage solenoid valve opens, and the excess coolant is discharged through the drainage diversion pipe, completing the automatic demolding of the lower mold. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the upper mold of this utility model;

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of the lower mold of this utility model.

[0022] In the diagram: 1. Lower mold; 2. Synchronous hydraulic lifting rod; 3. Upper mold; 4. Injection pipe; 5. Injection port; 6. Injection groove; 7. Synchronous electric telescopic rod; 8. Irregular sealing block; 9. Injection solenoid valve; 10. Drain solenoid valve; 11. Injection diverter pipe; 12. Discharge diverter pipe; 13. Discharge solenoid valve; 14. Movable groove; 15. Main electric telescopic ejector rod; 16. Main top plate; 17. Auxiliary electric telescopic rod; 18. Auxiliary annular top plate; 19. Auxiliary protrusion; 20. Insertion hole; 21. Guide frame; 22. Guide groove; 23. Guide block; 24. Air outlet groove; 241. Air outlet pipe; 242. Air inlet valve; 243. Upper electric telescopic ejector rod; 244. Upper sealing block. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-3 This utility model provides the following technical solution: a plastic cement cylinder product injection molding and demolding mold, including a lower mold 1, with synchronous hydraulic lifting rods 2 at the four corners of the lower mold 1, an upper mold 3 at the top of the synchronous hydraulic lifting rods 2, an injection tube 4 embedded on one side of the top of the upper mold 3, an injection port 5 opened on one side of the bottom of the upper mold 3, the injection tube 4 and the injection port 5 are sealed and connected, injection grooves 6 are opened on both sides of the bottom of the inner wall of the lower mold 1, a synchronous electric telescopic rod 7 is provided on one side of the inner wall of the injection groove 6, a special-shaped sealing block 8 is provided at one end of the synchronous electric telescopic rod 7, an injection solenoid valve 9 is embedded at the top of the other side of the inner wall of the injection groove 6, a drainage solenoid valve 10 is embedded at the bottom of the other side of the inner wall of the injection groove 6, an injection diversion pipe 11 is provided at the top of one side of the lower mold 1, the two ends of the injection diversion pipe 11 are sealed and connected to the injection solenoid valve 9, and a discharge diversion pipe 12 is provided at the bottom of one side of the lower mold 1, the two ends of the discharge diversion pipe 12 are sealed and connected to the discharge solenoid valve 13.

[0025] In a specific embodiment of an injection molding demolding mold for a plastic cement cylinder product, please refer to... Figure 3 The bottom of the inner wall of the lower mold 1 is provided with a movable groove 14, and the bottom of the movable groove 14 is provided with a main electric telescopic ejector rod 15. The top of the main electric telescopic ejector rod 15 is fixedly connected to the main top plate 16.

[0026] Please see Figure 3 After the upper mold 3 and the lower mold 1 are combined, injection molding is performed through the injection tube 4. After injection molding is completed, the synchronous electric telescopic rod 7 retracts the irregular sealing block 8, and the injection diversion pipe 11 pumps the coolant into the injection tank 6. The coolant seeps into the groove of the inner wall of the injection molded part and the lower mold 1, so that the injection molded part cools and solidifies quickly and separates from the inner wall of the lower mold 1. At this time, the drain solenoid valve 10 opens, and the excess coolant is discharged through the drain diversion pipe 12. At this time, the upper mold 3 is separated, and the main electric telescopic ejector rod 15 extends the main ejector plate to eject the injection molded product.

[0027] In a specific embodiment of an injection molding demolding mold for a plastic cement cylinder product, please refer to... Figure 3 The bottom sides of the inner wall of the movable groove 14 are provided with auxiliary electric telescopic rods 17. The top of the auxiliary electric telescopic rods 17 is fixedly provided with an auxiliary annular top plate 18. Several auxiliary protrusions 19 are distributed on the top of the auxiliary annular top plate 18. Several insertion holes 20 are distributed on the surface of the main top plate 16. The auxiliary protrusions 19 are movably connected to the insertion holes 20.

[0028] Please see Figure 3 The extension and retraction of the auxiliary electric telescopic rod 17 assists the annular top plate 18 to move up and down within the insertion hole 20, lifting the bottom of the injection molded part and separating the bottom of the injection molded part from the part that is adhered to the main top plate 16.

[0029] In a specific embodiment of an injection molding and demolding mold for a plastic cement cylinder product, please refer to the figure: the lower mold 1 is provided with guide frames 21 on both sides, and guide grooves 22 are provided on the inner side of the guide frames 21; the upper mold 3 is provided with guide blocks 23 on both sides, and the guide blocks 23 are slidably connected in the guide grooves 22.

[0030] Please see Figure 1 When the synchronous hydraulic lifting rod 2 moves the upper mold 3, the guide block 23 moves within the guide groove 22 to guide the movement direction of the upper mold 3.

[0031] In a specific embodiment of an injection molding demolding mold for a plastic cement cylinder product, please refer to... Figure 2 The bottom of the upper mold 3 is provided with an air outlet groove 24. An air outlet pipe 241 is embedded on one side of the bottom of the inner wall of the air outlet groove 24. An air inlet valve 242 is embedded on the other side of the top of the upper mold 3. The air inlet valve 242 is sealed and connected to the air outlet pipe 241.

[0032] Please see Figure 2 After injection molding is completed, the upper electric telescopic ejector rod 243 retracts the upper sealing block 244, and the external cooling gas is blown into the air outlet groove 24 through the air inlet valve 242 to inflate the inner wall of the injection molded part, so that the injection molded part falls off the outside of the upper mold 3.

[0033] In a specific embodiment of an injection molding demolding mold for a plastic cement cylinder product, please refer to... Figure 2 The top of the inner wall of the air outlet 24 is provided with an upper electric telescopic rod 243, and an upper sealing block 244 is fixedly connected to the bottom of the upper electric telescopic rod 243.

[0034] Please see Figure 2 During the injection molding process, the upper electric telescopic push rod 243 extends the upper sealing block 244, and the sealing block 244 is used to block the air outlet groove 24 to prevent the injection molding liquid from flowing into the air outlet groove 24.

[0035] This utility model provides an injection molding die for plastic cement cylinder products. The specific usage is as follows: a synchronous hydraulic lifting rod 2 presses down on the upper mold 3, and a guide block 23 moves within a guide groove 22 to guide the movement of the upper mold 3, improving its stability during movement. After the upper mold 3 and lower mold 1 merge, an electric telescopic rod 243 extends the upper sealing block 244 to block the vent groove 24. A synchronous electric telescopic rod 7 extends a shaped sealing block 8 to seal the injection groove 6. Injection is then performed through the injection pipe 4. After injection, the synchronous electric telescopic rod 7 retracts the shaped sealing block 8, exposing the injection solenoid valve 9 and the drainage solenoid valve 10. The injection diversion pipe 11 pumps the coolant into the injection groove 6. Inside, coolant seeps into the groove between the injection molded part and the inner wall of the lower mold 1, allowing the injection molded part to cool and solidify quickly and separate from the inner wall of the lower mold 1. At this time, the drain solenoid valve 10 opens, and excess coolant is discharged through the discharge diversion pipe 12. At this time, the upper mold 3 is disengaged, and the main electric telescopic ejector rod 15 extends the main ejector plate to eject the injection molded product. The auxiliary electric telescopic rod 17 extends and retracts, allowing the auxiliary annular ejector plate 18 to move up and down in the insertion hole 20, lifting the bottom of the injection molded part and separating the bottom of the injection molded part from the part that is stuck to the main ejector plate 16. After the injection is completed, the upper electric telescopic ejector rod 243 retracts the upper sealing block 244, and the air inlet valve 242 blows external cooling gas into the air outlet groove 24 and inflates the inner wall of the injection molded part, causing the injection molded part to fall off from the outside of the upper mold 3.

[0036] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A molding die for injection molding of plastic cement cylinder products, comprising a lower die (1), characterized in that: The lower mold (1) is provided with synchronous hydraulic lifting rods (2) at its four corners. The upper mold (3) is provided at the top of the synchronous hydraulic lifting rods (2). An injection tube (4) is embedded on one side of the top of the upper mold (3). An injection port (5) is opened on one side of the bottom of the upper mold (3). The injection tube (4) and the injection port (5) are sealed and connected. Injection grooves (6) are opened on both sides of the bottom of the inner wall of the lower mold (1). A synchronous electric telescopic rod (7) is provided on one side of the inner wall of the injection groove (6). The synchronous electric telescopic rod (7) is... The end is provided with a special-shaped sealing block (8), the top of the other side of the inner wall of the injection tank (6) is provided with an injection solenoid valve (9), the bottom of the other side of the inner wall of the injection tank (6) is provided with a drain solenoid valve (10), the top of one side of the lower mold (1) is provided with an injection diversion pipe (11), the two ends of the injection diversion pipe (11) are sealed and connected to the injection solenoid valve (9), the bottom of one side of the lower mold (1) is provided with a drain diversion pipe (12), the two ends of the drain diversion pipe (12) are sealed and connected to the drain solenoid valve (13).

2. The injection molding die for plastic cement cylinder products according to claim 1, characterized in that: The lower mold (1) has a movable groove (14) at the bottom of its inner wall. The bottom of the movable groove (14) is provided with a main electric telescopic push rod (15), and the top of the main electric telescopic push rod (15) is fixedly connected to a main top plate (16).

3. The injection molding die for plastic cement cylinder products according to claim 2, characterized in that: The inner wall of the movable groove (14) is provided with auxiliary electric telescopic rods (17) on both sides. The top of the auxiliary electric telescopic rod (17) is fixedly provided with an auxiliary annular top plate (18). The top of the auxiliary annular top plate (18) is provided with a number of auxiliary protrusions (19). The surface of the main top plate (16) is provided with a number of insertion holes (20). The auxiliary protrusions (19) are movably connected to the insertion holes (20).

4. The injection molding die for plastic cement cylinder products according to claim 3, characterized in that: The lower mold (1) is provided with guide frames (21) on both sides, and a guide groove (22) is provided on the inner side of the guide frame (21). The upper mold (3) is provided with guide blocks (23) on both sides, and the guide blocks (23) are slidably connected in the guide groove (22).

5. The injection molding die for plastic cement cylinder products according to claim 1, characterized in that: The upper mold (3) has an air outlet groove (24) at the bottom. An air outlet pipe (241) is embedded on one side of the bottom of the inner wall of the air outlet groove (24). An air inlet valve (242) is embedded on the other side of the top of the upper mold (3). The air inlet valve (242) is sealed and connected to the air outlet pipe (241).

6. The injection molding die for a plastic cement cylinder product according to claim 5, characterized in that: The top of the inner wall of the air outlet groove (24) is provided with an upper electric telescopic rod (243), and an upper sealing block (244) is fixedly connected to the bottom of the upper electric telescopic rod (243).

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