Injection foaming forming mold for polyvinyl chloride high polymer material
By combining hydraulic drive and vibration mechanism, the problems of low demolding efficiency and air bubbles in the injection molding of polyvinyl chloride polymer materials are solved, achieving rapid demolding and high-quality molding.
Patent Information
- Application Number
- CN202520171975.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-26
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-01-26
AI Technical Summary
The demolding process in traditional polyvinyl chloride (PVC) injection molding is inefficient, easily damages the workpiece, and results in significant material waste. Furthermore, air bubbles are easily generated during the molding process.
The hydraulically driven demolding mechanism and vibration mechanism, combined with the design of pry bars and rubber discs, enable rapid demolding and prevent air bubble formation.
It improves demolding efficiency, reduces manpower waste, ensures workpiece quality and avoids internal air bubbles, thereby improving production efficiency and molding quality.
Smart Images
Figure CN223763616U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of polymer injection molding technology, and in particular to an injection foaming mold for polyvinyl chloride polymer materials. Background Technology
[0002] In the injection molding process of polyvinyl chloride (PVC) polymer materials, demolding is a critical step that directly affects product quality, production efficiency, and manufacturing costs, and its importance cannot be ignored. The injection molding process transforms PVC polymer materials into products with specific shapes through high-temperature melting, injection molding, and cooling and solidification. However, due to material shrinkage, the complexity of workpiece structures, and the diversity of mold designs, the demolding stage often faces challenges. Optimizing demolding technology can not only improve yield and process efficiency but also significantly reduce manual intervention and resource waste in the manufacturing process.
[0003] Traditional demolding methods have some shortcomings in practical applications. For example, manual demolding relies on the operator's experience and skills, which is inefficient and prone to inconsistencies when dealing with complex workpieces or high-intensity production tasks. This method can also affect the surface finish and dimensional accuracy of the workpiece, and may even lead to product damage or mold wear, thereby increasing material waste and production costs.
[0004] To address this issue, a polyvinyl chloride (PVC) polymer injection foaming mold is proposed. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a polyvinyl chloride polymer material injection foaming mold, which aims to improve the problems of the archer being difficult to demold after molding and the easy generation of air bubbles inside the workpiece during the molding process.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: a polyvinyl chloride polymer material injection foaming mold, including a worktable, a support fixedly connected to the top of the worktable, a hydraulic cylinder fixedly connected to the middle of the support, an upper mold fixedly connected to the output end of the hydraulic cylinder, a lower mold fixedly connected to the top of the worktable, a demolding mechanism provided inside the worktable, and a vibration mechanism provided on the top of the worktable;
[0007] The demolding mechanism includes a hollow column, the bottom of which is fixedly connected to the inside of the worktable. A circular column is slidably connected inside the hollow column, a pad is fixedly connected to the outside of the circular column, and a spring is sleeved on the outside of the circular column. A lifting plate is fixedly connected to one end of the circular column that passes through the top of the hollow column and the bottom of the lower mold. An H-shaped block is fixedly connected inside the worktable, and a pry bar is slidably connected to the middle of the H-shaped block.
[0008] As a further description of the above technical solution:
[0009] The vibration mechanism includes a base and a motor. The bottom of the base is fixedly connected to the top of the workbench, and the motor is fixedly connected inside the base. A turntable is fixedly connected to the output end of the motor. An eccentric shaft is fixedly connected to the top of the turntable. A rotating shaft is rotatably connected to the outside of the eccentric shaft. A limit block is fixedly connected to the top of the base. A slider is slidably connected to the top of the limit block. A connecting rod is fixedly connected to the outside of the slider. A rubber disc is fixedly connected to the end of the connecting rod away from the slider.
[0010] As a further description of the above technical solution:
[0011] One end of the pry bar is slidably connected inside the hollow column, and the top of the pry bar abuts against the bottom of the circular column.
[0012] As a further description of the above technical solution:
[0013] The circular column and the lifting plate are both slidably connected inside the lower mold, and the pad is slidably connected inside the hollow column.
[0014] As a further description of the above technical solution:
[0015] One end of the spring is fixedly connected to the top of the pad, and the other end of the spring abuts against the inner top wall of the hollow column.
[0016] As a further description of the above technical solution:
[0017] The end of the rotating shaft away from the eccentric shaft is rotatably connected to the outside of the slider, and the outside of the rubber disc abuts against the upper mold and the lower mold.
[0018] As a further description of the above technical solution:
[0019] A sliding groove is provided on the outer side of the workbench, and the pry bar is slidably connected inside the sliding groove.
[0020] As a further description of the above technical solution:
[0021] The upper mold is fixedly connected to a feed pipe.
[0022] This utility model has the following beneficial effects:
[0023] 1. In this utility model, when polyvinyl chloride polymer material is being molded, the upper mold is opened and the pry bar is pressed down. The pry bar will slide inside the H-shaped frame and also inside the hollow column. As a result, the pry bar will push the circular column upward, thereby pushing up the lifting plate. This allows the molded workpiece to be demolded quickly, preventing it from affecting the next injection molding process. This effectively improves work efficiency and reduces unnecessary manpower waste.
[0024] 2. In this utility model, during the molding process of polyvinyl chloride polymer material, the motor is started, and the turntable drives the eccentric shaft to rotate. With the cooperation of the turntable, slider and limit block, the rubber disc will reciprocate to impact the upper mold and lower mold, effectively preventing the generation of air bubbles inside the material during the molding process, thereby improving product quality. Attached Figure Description
[0025] Figure 1 This is a three-dimensional schematic diagram of an injection foaming mold for polyvinyl chloride polymer material proposed in this utility model;
[0026] Figure 2 This is a schematic diagram of the exploded structure of a polyvinyl chloride polymer injection foaming mold proposed in this utility model.
[0027] Figure 3 for Figure 2 Enlarged view of point A in the middle;
[0028] Figure 4 for Figure 2 Enlarged diagram of point B in the middle.
[0029] Legend:
[0030] 1. Support; 2. Feed pipe; 3. Rubber disc; 4. Turntable; 5. Base; 6. Pry bar; 7. Slide 1; 8. Worktable; 9. Lower mold; 10. Upper mold; 11. Hydraulic cylinder; 12. Eccentric shaft; 13. Rotating shaft; 14. Slider; 15. Connecting rod; 16. Limit block; 17. Motor; 18. Lifting plate; 19. Spring; 20. Pad; 21. H-block; 22. Hollow column; 23. Circular column. Detailed Implementation
[0031] 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.
[0032] Reference Figures 1-4An embodiment of this utility model is provided: a polyvinyl chloride polymer material injection foaming mold, including a worktable 8, a support 1 fixedly connected to the top of the worktable 8, a hydraulic cylinder 11 fixedly connected to the middle of the support 1, an upper mold 10 fixedly connected to the output end of the hydraulic cylinder 11, a lower mold 9 fixedly connected to the top of the worktable 8, a demolding mechanism provided inside the worktable 8, and a vibration mechanism provided on the top of the worktable 8.
[0033] The demolding mechanism includes a hollow column 22, the bottom of which is fixedly connected to the inside of the worktable 8. A circular column 23 is slidably connected inside the hollow column 22. A pad 20 is fixedly connected to the outside of the circular column 23. A spring 19 is sleeved on the outside of the circular column 23. A lifting plate 18 is fixedly connected to one end of the circular column 23, which passes through the top of the hollow column 22 and the bottom of the lower mold 9. An H-shaped block 21 is fixedly connected inside the worktable 8. A pry bar 6 is slidably connected to the middle of the H-shaped block 21. The upper mold 10 is located inside... The upper mold 10 is fixedly connected to the feed pipe 2. A groove 7 is provided on the outer side of the worktable 8. A pry bar 6 is slidably connected inside the groove 7. One end of the pry bar 6 is slidably connected inside the hollow column 22, and the top of the pry bar 6 abuts against the bottom of the circular column 23. The circular column 23 and the lifting plate 18 are both slidably connected inside the lower mold 9. A pad 20 is slidably connected inside the hollow column 22. One end of the spring 19 is fixedly connected to the top of the pad 20, and the other end of the spring 19 abuts against the inner top wall of the hollow column 22. The worktable 8 serves as the basic support platform for the mold, fixing and supporting the entire mold system to ensure processing stability. The bracket 1 is used to fix the hydraulic cylinder 11, providing stable support for the upper mold 10. The hydraulic cylinder 11 is used to drive the upper mold 10 to move up and down, realizing mold closing and opening. The upper mold 10, as the upper part of the injection molding mold, cooperates with the lower mold 9 to complete injection molding; the feed pipe 2 is connected internally. The lower mold 9, as the lower part of the injection molding mold, cooperates with the upper mold 10 to form a mold cavity, completing product molding. The feed pipe 2 is used to inject PVC material into the mold cavity, ensuring uniform material distribution. The hollow column 22 provides a sliding guide for the circular column 23 and also serves as a fixing component for the spring 19 and the circular column 23. The circular column 23, in cooperation with the ejector plate 18 and the pry bar 6, drives the demolding mechanism to eject the molded product. The pad 20 serves as a support component for the spring 19, helping it return the circular column 23 to its initial position. The spring 19 provides a restoring force to reset the demolding mechanism, maintaining the continuity of mold operation. The ejector plate 18, driven by the circular column 23, ejects the molded product from the mold cavity. The H-block 21 provides a sliding guide for the pry bar 6, ensuring smooth operation. The pry bar 6 abuts against the bottom of the circular column 23, providing auxiliary drive to the demolding mechanism through sliding. The slide groove 7 provides a sliding path for the pry bar 6, restricting its direction of movement.
[0034] Reference Figures 1-4The vibration mechanism includes a base 5 and a motor 17. The bottom of the base 5 is fixedly connected to the top of the worktable 8. The motor 17 is fixedly connected inside the base 5. A turntable 4 is fixedly connected to the output end of the motor 17. An eccentric shaft 12 is fixedly connected to the top of the turntable 4. A rotating shaft 13 is rotatably connected to the outside of the eccentric shaft 12. A limit block 16 is fixedly connected to the top of the base 5. A slider 14 is slidably connected to the top of the limit block 16. A connecting rod 15 is fixedly connected to the outside of the slider 14. A rubber disc 3 is fixedly connected to the end of the connecting rod 15 away from the slider 14. The end of the rotating shaft 13 away from the eccentric shaft 12 is rotatably connected to the outside of the slider 14. The outside of the rubber disc 3 abuts against the upper mold 10 and the lower mold 9. The base 5 is used to fix the vibration mechanism, provide stable support, and transmit the vibration force of the motor 17 to the worktable 8. The motor 17 provides power to the vibration mechanism, and the rotation of the turntable 4 through rotation output drives the entire vibration mechanism to work. The turntable 4 is connected to the output end of the motor 17, transmitting the rotational motion of the motor 17 to the eccentric shaft 12. The eccentric shaft 12, rotating shaft 13, and slider 14 work together to achieve the reciprocating motion of the connecting rod 15, thereby causing the rubber disc 3 to impact and vibrate against the upper mold 10 and lower mold 9, preventing air bubbles from forming inside the PVC during the molding process. The limiting block 16 provides a motion track for the sliding of the slider 14. The rubber disc 3 directly abuts against the upper mold 10 and lower mold 9, and the back-and-forth impact causes the molds to vibrate slightly, which helps to enhance the flowability of the PVC material within the mold cavity and improve the molding quality.
[0035] Working principle: First, the hydraulic cylinder 11 on the support 1 lowers the upper mold 10, closing it with the lower mold 9. Then, a certain amount of polyvinyl chloride (PVC) material is injected into the feed pipe 2. During material solidification, the motor 17 is started, driving the turntable 4 to rotate, which in turn drives the eccentric shaft 12 to rotate. Through the coordinated action of the rotating shaft 13, the slider 14, and the connecting rod 15, the reciprocating motion of the connecting rod 15 is achieved. Simultaneously, the rubber disc 3 continuously impacts the upper mold 10 and the lower mold 9 under this mechanical drive, effectively preventing the formation of air bubbles inside the workpiece during solidification.
[0036] After the workpiece has completely solidified, the upper mold 10 is opened. Then, by pressing down the pry bar 6, the circular column 23 slides inside the hollow column 22, thereby lifting the plate 18 and ejecting the formed workpiece from the lower mold 9, successfully completing the demolding process. This significantly improves production efficiency and workpiece quality.
[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present 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 the present utility model should be included within the protection scope of the present utility model.
Claims
1. A polyvinyl chloride high molecular material injection foaming forming mold comprising a workbench (8), characterized in that: The top of the workbench (8) is fixedly connected with a support (1), the middle of the support (1) is fixedly connected with a hydraulic cylinder (11), the output end of the hydraulic cylinder (11) is fixedly connected with an upper mold (10), the top of the workbench (8) is fixedly connected with a lower mold (9), the inside of the workbench (8) is provided with a demolding mechanism, and the top of the workbench (8) is provided with a vibrating mechanism. The demolding mechanism comprises a hollow column (22), the bottom of the hollow column (22) is fixedly connected in the inside of the workbench (8), the inside of the hollow column (22) is slidably connected with a circular column (23), the outer side of the circular column (23) is fixedly connected with a backing plate (20), the outer side of the circular column (23) is sleeved with a spring (19), the circular column (23) penetrates through the top of the hollow column (22) and the bottom of the lower mold (9) and is fixedly connected with a jacking disc (18) at one end, the inside of the workbench (8) is fixedly connected with an H-shaped block (21), and the middle of the H-shaped block (21) is slidably connected with a crowbar (6).
2. The polyvinyl chloride polymer material injection foaming forming mold according to claim 1, characterized in that: The vibrating mechanism comprises a base (5) and a motor (17), the bottom of the base (5) is fixedly connected to the top of the workbench (8), the motor (17) is fixedly connected in the inside of the base (5), the output end of the motor (17) is fixedly connected with a rotating disc (4), the top of the rotating disc (4) is fixedly connected with an eccentric shaft (12), the outer side of the eccentric shaft (12) is rotatably connected with a rotating shaft (13), the top of the base (5) is fixedly connected with a limiting block (16), the top of the limiting block (16) is slidably connected with a sliding block (14), the outer side of the sliding block (14) is fixedly connected with a connecting rod (15), and the end, away from the sliding block (14), of the connecting rod (15) is fixedly connected with a rubber disc (3).
3. The polyvinyl chloride polymer material injection foaming forming mold according to claim 1, characterized in that: One end of the crowbar (6) is slidably connected in the inside of the hollow column (22), and the top of the crowbar (6) abuts against the bottom of the circular column (23).
4. The polyvinyl chloride polymer material injection foaming forming mold according to claim 1, characterized in that: The circular column (23) and the jacking disc (18) are both slidably connected in the inside of the lower mold (9), and the backing plate (20) is slidably connected in the inside of the hollow column (22).
5. The polyvinyl chloride polymer injection foam molding mold according to claim 1, characterized in that: One end of the spring (19) is fixedly connected to the top of the backing plate (20), and the other end of the spring (19) abuts against the inner top wall of the hollow column (22).
6. The polyvinyl chloride polymer material injection foam forming mold according to claim 2, characterized in that: The rotating shaft (13) is rotatably connected to the outer side of the sliding block (14) at the end, away from the eccentric shaft (12), and the outer side of the rubber disc (3) abuts against the upper mold (10) and the lower mold (9).
7. The polyvinyl chloride polymer injection foam molding die according to claim 1, wherein: The outer side of the workbench (8) is provided with a sliding groove (7), and the crowbar (6) is slidably connected in the inside of the sliding groove (7).
8. The polyvinyl chloride polymer material injection foaming forming mold according to claim 1, characterized in that: The inside of the upper mold (10) is fixedly connected with a feeding pipe (2).