Injection mold with variable injection molding cavity size for plastic product processing

Abstract

The utility model provides an injection mold with a size-variable injection molding cavity for plastic product processing, which relates to the technical field of injection molds and comprises a lower mold, an upper mold is arranged on the top surface of the lower mold, molding cavities for injection molding are formed in the top surface of the lower mold and the bottom surface of the upper mold, and a feeding hole is formed in the top surface of the upper mold. A feeding hole is formed in the upper mold and communicates with a forming cavity in the upper mold, the lower mold, the upper mold, an air pump, a three-way pipe, a supporting pipe, an air bag, an air bag, a sealing frame and the forming cavity are matched with one another, so that a movable plate moves to a proper position in the forming cavity, and the movable plate, a connecting rod, a sliding seat, a supporting box and a spring are matched with one another; the moving stability of the movable plates can be improved, a worker moves the two movable plates to proper positions, the injection molding area in the forming cavity is reduced, and the effect of adjusting the sizes of the forming cavities in the lower mold and the upper mold is achieved.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to an injection mold with variable injection cavity size for processing plastic products. Background Technology

[0002] Injection molds are indispensable key components in the injection molding process. During injection molding, plastic raw materials (usually thermoplastics) are heated to a molten state, and then injected into the mold cavity at a specific pressure and speed through the injection unit of the injection molding machine. The shape and size of the mold cavity determine the shape and size of the plastic product. After the plastic cools and solidifies within the cavity, the mold is opened, and the molded plastic product can be removed. The design and manufacturing precision of the injection mold have a crucial impact on the quality, production efficiency, and cost of the plastic product.

[0003] A search revealed problems with existing injection molds. Because the cavity size is fixed, a single mold can only mold one type of plastic part, making it difficult to adjust the molding cavity and thus hindering the mold's reuse. Therefore, it is necessary to provide a new type of injection mold with a variable-sized injection cavity for processing plastic products to solve these technical problems. Utility Model Content

[0004] The technical problem solved by this utility model is to provide an injection mold with a variable injection cavity size for processing plastic products.

[0005] To solve the above technical problems, this utility model provides an injection mold with variable injection cavity size for processing plastic products, comprising: a lower mold, an upper mold provided on the top surface of the lower mold, molding cavities for injection molding being provided on the top surface of the lower mold and the bottom surface of the upper mold, a feeding hole provided on the top surface of the upper mold, the feeding hole being connected to the molding cavity on the upper mold, and a connecting pipe for feeding being fixedly installed on the top surface of the upper mold;

[0006] An adjustment mechanism is provided inside the upper mold and is used to adjust the space inside the molding cavity.

[0007] Preferably, the adjusting mechanism includes several movable plates, which are slidably connected inside the two molding cavities. Airbags are fixedly installed on both sides of the upper mold. A three-way pipe is provided on one side of the lower mold and one side of the upper mold. Support pipes are connected to both ends of the three-way pipe. One end of the support pipe passes through the lower mold or the upper mold and communicates with the airbag. An air pump for air intake is fixedly sleeved on the outer circular wall of the three-way pipe. Support boxes are fixedly installed on both sides of the molding cavity. A sliding seat is slidably connected to the inner circular wall of the support box. A connecting rod is fixedly installed on one side of the sliding seat. One end of the connecting rod passes through the support box and is fixedly connected to one side of the movable plate. A spring is sleeved on the outer circular wall of the connecting rod.

[0008] Preferably, a flow equalization valve is fixedly sleeved on the inner circular wall of the three-way pipe, and two air inlet valves are fixedly sleeved on the inner circular wall of the three-way pipe.

[0009] Preferably, two support blocks are fixedly installed on one side of the lower mold and one side of the upper mold. A fixing ring is fixedly installed on the outer circular wall of the support block, and the inner circular wall of the fixing ring is fixedly sleeved with the outer circular wall of the support tube.

[0010] Preferably, the top surface of the lower mold is provided with a plurality of positioning grooves, and the bottom surface of the upper mold is fixedly installed with a plurality of positioning posts for positioning, wherein the outer circular wall surface of the positioning posts is movably sleeved with the inner circular wall surface of the positioning grooves.

[0011] Preferably, support plates are fixedly installed on both sides of the lower mold, and the top surface of the support plates has a plurality of fixing holes.

[0012] Compared with related technologies, the injection mold with variable injection cavity size for processing plastic products provided by this utility model has the following beneficial effects:

[0013] This utility model provides an injection mold with a variable injection cavity size for processing plastic products. Through the cooperation of the lower mold, upper mold, air pump, T-pipe, support pipe, airbag, sealing frame and molding cavity, the movable plate can be moved to a suitable position inside the molding cavity. The stability of the movable plate movement can be improved by the cooperation of the movable plate, connecting rod, sliding seat, support box and spring. The operator moves the two movable plates to a suitable position to reduce the injection area inside the molding cavity, thereby achieving the effect of adjusting the size of the molding cavity of the lower mold and upper mold, which helps to reuse the lower mold and upper mold. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a rear view schematic diagram of the connection structure between the upper mold and the feed hole of this utility model;

[0016] Figure 3 This is a schematic diagram of the connection structure between the movable plate and the molding cavity of this utility model;

[0017] Figure 4 This is a schematic diagram of the connection structure between the sliding seat and the support box of this utility model;

[0018] Figure 5 This is a schematic diagram of the connection structure between the intake valve and the three-way pipe of this utility model.

[0019] The following are the labels in the diagram: 1. Lower mold; 2. Upper mold; 3. Molding cavity; 4. Support plate; 5. Fixing hole; 6. Adjustment mechanism; 7. Positioning groove; 8. Positioning pin; 9. Feed hole; 10. Connecting pipe; 11. Movable plate; 12. Sealing frame; 13. Airbag; 14. Support box; 15. T-pipe; 16. Air pump; 17. Support block; 18. Fixing ring; 19. Support pipe; 20. Sliding seat; 21. Connecting rod; 22. Spring; 23. Air inlet valve; 24. Flow equalization valve. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Please refer to the following: Figures 1-5 ,in, Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a rear view schematic diagram of the connection structure between the upper mold and the feed hole of this utility model; Figure 3 This is a schematic diagram of the connection structure between the movable plate and the molding cavity of this utility model; Figure 4 This is a schematic diagram of the connection structure between the sliding seat and the support box of this utility model; Figure 5 This is a schematic diagram of the connection structure of the air intake valve and the three-way pipe of this utility model. A variable-size injection mold for processing plastic products includes a lower mold 1, an upper mold 2 on the top surface of the lower mold 1, molding cavities 3 for injection molding on both the top surface of the lower mold 1 and the bottom surface of the upper mold 2, a feed hole 9 on the top surface of the upper mold 2 connected to the molding cavity 3 on the upper mold 2, a connecting pipe 10 for feeding material fixedly installed on the top surface of the upper mold 2, and an adjusting mechanism 6 disposed inside the upper mold 2 for adjusting the space inside the molding cavity 3.

[0022] The adjusting mechanism 6 includes several movable plates 11, which are slidably connected inside the two molding cavities 3. A sealing frame 12 is fixedly sleeved on the outside of each movable plate 11 to reduce the gap between the movable plate 11 and the molding cavity 3. Airbags 13 are fixedly installed on both sides of the interior of the upper mold 2. A three-way pipe 15 is provided on one side of the lower mold 1 and one side of the upper mold 2. Support pipes 19 are bolted to both ends of the three-way pipe 15. One end of the support pipe 19 passes through the lower mold 1 or the upper mold 2 and is connected to the airbag 13. An air pump 16 for air intake is fixedly sleeved on the outer circular wall of the three-way pipe 15. Support boxes 14 are fixedly installed on both sides of the inside of the molding cavity 3. A sliding seat 20 is slidably connected to the inner circular wall of the support box 14. A connecting rod 21 is fixedly installed on one side of the sliding seat 20. One end of the connecting rod 21 passes through the support box 14 and is fixedly connected to one side of the movable plate 11. A spring 22 is sleeved on the outer circular wall of the connecting rod 21. One end of the spring 22 is fixedly connected to one side of the sliding seat 20, and the other end of the spring 22 is fixedly connected to one side of the inside of the support box 14.

[0023] When the air pump 16 is started, air enters the interior of the two support tubes 19 through the three-way pipe 15. The air in the support tubes 19 enters the airbag 13. The airbag 13 inflates and expands, causing the movable plate 11 to move outward. The outward movement of the movable plate 11 drives the sliding seat 20 and the connecting rod 21 to move in the support box 14, while the spring 22 is compressed. This can restrict the movement of the movable plate 11. After the two movable plates 11 move inward, the injectionable area inside the molding cavity 3 is reduced, thereby adjusting the size of the molding cavity 3 of the lower mold 1 and the upper mold 2.

[0024] In the above method, when injection molding is performed using the lower mold 1 and the upper mold 2, the operator starts the air pump 16. The air pump 16 delivers air into the interior of the three-way pipe 15. The air entering the interior of the three-way pipe 15 enters the interior of the airbag 13 through the two support pipes 19. After the airbag 13 is inflated, it expands, causing the movable plate 11 and the sealing frame 12 to move inward inside the molding cavity 3. The inward movement of the movable plate 11 drives the connecting rod 21 to move outward. The outward movement of the connecting rod 21 causes the sliding seat 20 to move outward inside the support box 14, while simultaneously compressing the spring 22. The support box 14, the connecting rod 21, and the spring 22 work together to restrict the movement of the movable plate 11, improving the stability of the movement of the movable plate 11. The operator moves the two movable plates 11 to a suitable position, reducing the area that can be injected inside the molding cavity 3, thereby achieving the effect of adjusting the size of the molding cavity 3 of the lower mold 1 and the upper mold 2, which helps to reuse the lower mold 1 and the upper mold 2.

[0025] A flow equalization valve 24 is fixedly sleeved on the inner circular wall of the three-way pipe 15. After the air passes through the flow equalization valve 24, the amount of air entering both ends of the three-way pipe 15 is the same. Two air inlet valves 23 are fixedly sleeved on the inner circular wall of the three-way pipe 15. By controlling the air inlet valves 23, it is possible to control which three-way pipe 15 is filled with air.

[0026] In this method, the air entering the three-way pipe 15 moves to both ends of the three-way pipe 15 through the flow equalization valve 24. The flow equalization valve 24 makes the air enter both ends of the three-way pipe 15 evenly. At the same time, the operator can control the opening and closing of the air inlet valve 23 on both ends of the three-way pipe 15. By controlling the opening and closing of the air inlet valve 23, the airbag 13 on either side can be selectively inflated, further adjusting the size of the molding cavity 3 on the lower mold 1 and the upper mold 2, and improving the adjustment effect of the size of the molding cavity 3.

[0027] Two support blocks 17 are fixedly installed on one side of the lower mold 1 and one side of the upper mold 2. A fixing ring 18 is fixedly installed on the outer circular wall of the support block 17. The inner circular wall of the fixing ring 18 is fixedly sleeved with the outer circular wall of the support tube 19. The support tube 19 can be supported by the cooperation of the support block 17 and the fixing ring 18.

[0028] In this method, the support block 17 and the fixing ring 18 can support the support tube 19 and prevent the support tube 19 from shaking.

[0029] The top surface of the lower mold 1 is provided with several positioning grooves 7, and the bottom surface of the upper mold 2 is fixedly installed with several positioning pins 8 for positioning. The outer circular wall surface of the positioning pin 8 is movably connected with the inner circular wall surface of the positioning groove 7.

[0030] In this method, when the lower mold 1 and the upper mold 2 are closed, multiple positioning pins 8 on the upper mold 2 will enter the interior of the positioning groove 7 on the lower mold 1. The positioning groove 7 and the positioning pins 8 work together to position the lower mold 1 and the upper mold 2 during mold closing, thereby improving the accuracy of the mold closing between the lower mold 1 and the upper mold 2.

[0031] Support plates 4 are fixedly installed on both sides of the lower mold 1, and several fixing holes 5 are opened on the top surface of the support plates 4.

[0032] In this method, by using the support plate 4, the worker inserts bolts into the fixing holes 5 on the support plate 4, thereby fixing the lower mold 1 onto the workbench.

[0033] The working principle of the variable-size injection mold for processing plastic products provided by this utility model is as follows: The lower mold 1 is placed on the workbench by the operator, and the lower mold 1 is fixed on the workbench by bolts passing through the fixing holes 5 on the support plate 4 to ensure that the mold remains stable in subsequent operations. The upper mold 2 is placed on the top surface of the lower mold 1, so that the positioning pin 8 on the bottom surface of the upper mold 2 is aligned with the positioning groove 7 on the top surface of the lower mold 1 and inserted, so as to achieve precise positioning of the lower mold 1 and the upper mold 2 and ensure the accuracy of mold closing.

[0034] Next, the air pump 16 is started, and the air pump 16 delivers air into the interior of the three-way pipe 15. The air is evenly distributed to both ends of the three-way pipe 15 through the flow equalization valve 24 inside the three-way pipe 15, and then enters the interior of the airbag 13 through the support pipe 19. After the airbag 13 is inflated, it expands and pushes the movable plate 11 and the sealing frame 12 to move inward inside the molding cavity 3. The inward movement of the movable plate 11 drives the connecting rod 21 to move outward. The outward movement of the connecting rod 21 drives the sliding seat 20 to move outward inside the support box 14. At the same time, the spring 22 is compressed. The support box 14, the connecting rod 21 and the spring 22 work together to restrict the movement of the movable plate 11 and improve the stability of the movement of the movable plate 11. According to the size of the plastic product to be injected, the two movable plates 11 are moved to a suitable position to reduce the injectionable area inside the molding cavity 3 and complete the adjustment of the size of the molding cavity 3.

[0035] Finally, the staff injects the plastic raw material into the molding cavity 3 through the feed hole 9 and connecting pipe 10 on the top surface of the upper mold 2 for injection molding. After the injection molding is completed, the air pump 16 is turned off, the gas in the air bag 13 is discharged, the movable plate 11 returns to its original position under the elastic force of the spring 22, the upper mold 2 is opened, and the molded plastic product is taken out.

[0036] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An injection mold with variable injection cavity size for processing plastic products, characterized in that, include: The lower mold (1) has an upper mold (2) on its top surface. Both the top surface of the lower mold (1) and the bottom surface of the upper mold (2) are provided with molding cavities (3) for injection molding. The top surface of the upper mold (2) is provided with a feeding hole (9). The feeding hole (9) is connected to the molding cavity (3) on the upper mold (2). A connecting pipe (10) for feeding is fixedly installed on the top surface of the upper mold (2). Adjustment mechanism (6) is provided inside the upper mold (2) for adjusting the space inside the molding cavity (3).

2. The injection mold with variable injection cavity size for processing plastic products according to claim 1, characterized in that, The adjusting mechanism (6) includes several movable plates (11), which are slidably connected to the interiors of the two molding cavities (3). Airbags (13) are fixedly installed on both sides of the interior of the upper mold (2). A three-way pipe (15) is provided on one side of the lower mold (1) and one side of the upper mold (2). Support pipes (19) are connected to both ends of the three-way pipe (15). One end of the support pipe (19) passes through the lower mold (1) or the upper mold (2) and is connected to the airbag (13). The three-way pipe (15) is connected to an air pump (16) for air intake, which is fixedly sleeved on the outer circular wall. Support boxes (14) are fixedly installed on both sides of the inside of the forming cavity (3). A sliding seat (20) is slidably connected to the inner circular wall of the support box (14). A connecting rod (21) is fixedly installed on one side of the sliding seat (20). One end of the connecting rod (21) passes through the support box (14) and is fixedly connected to one side of the movable plate (11). A spring (22) is sleeved on the outer circular wall of the connecting rod (21).

3. The injection mold with variable injection cavity size for processing plastic products according to claim 2, characterized in that, A flow equalization valve (24) is fixedly sleeved on the inner circular wall of the three-way pipe (15), and two air inlet valves (23) are fixedly sleeved on the inner circular wall of the three-way pipe (15).

4. The injection mold with variable injection cavity size for processing plastic products according to claim 2, characterized in that, Two support blocks (17) are fixedly installed on one side of the lower mold (1) and one side of the upper mold (2). A fixing ring (18) is fixedly installed on the outer circular wall of the support block (17), and the inner circular wall of the fixing ring (18) is fixedly sleeved with the outer circular wall of the support tube (19).

5. The injection mold with variable injection cavity size for processing plastic products according to claim 1, characterized in that, The lower mold (1) has several positioning grooves (7) on its top surface, and the upper mold (2) has several positioning posts (8) fixedly installed on its bottom surface for positioning. The outer circular wall of the positioning post (8) is movably connected to the inner circular wall of the positioning groove (7).

6. The injection mold with variable injection cavity size for processing plastic products according to claim 1, characterized in that, The lower mold (1) is fixedly installed on both sides with support plates (4), and the top surface of the support plates (4) has several fixing holes (5).

Images