Mold locking mechanism of injection molding machine

Abstract

The utility model discloses a mould locking mechanism of an injection molding machine, which comprises a fixed mould and a movable mould, a first fixed frame is fixedly welded outside the fixed mould, a second fixed frame is fixedly welded outside the movable mould, a mould locking device and a driving device are arranged outside the first fixed frame and the second fixed frame, and the mould locking device comprises a first moving block and a second moving block. A first chamfer is arranged on the edge of the lower surface of the first fixing frame, a second chamfer is arranged on the edge of the upper surface of the second fixing frame, the mold locking device is arranged in the mold locking device, the first moving block and the second moving block are close to the first fixing frame on the fixed mold and the second fixing frame on the movable mold at the same time, and the first moving block and the second moving block continuously close to each other. And the movable mold and the fixed mold are tightly pressed to be locked together.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machines, and more specifically, it relates to a mold clamping mechanism of an injection molding machine. Background Art

[0002] Generally, a moving mold and a fixed mold are provided in an injection molding machine. A hydraulic device is provided on the moving mold to drive it to move up and down for mold clamping and mold opening. After mold clamping, raw materials are injected between the moving mold and the fixed mold for injection molding production until the molten plastic fills the cavity. After cooling and forming, the mold is opened to take out the formed product. Currently, a mold clamping mechanism is generally not provided on the injection molding machine. After mold clamping, the fixed mold and the moving mold cannot be locked. During the injection molding process, when the internal pressure increases, it is very easy to cause the mold clamping part to open, resulting in raw material overflow or a large mold clamping line, and a grinding device is also required to grind the mold clamping line, resulting in low production efficiency. In addition, although some injection molding machines are provided with a mold clamping mechanism to lock the moving mold and the fixed mold after mold clamping, the mold clamping method is complex, and a complex unlocking operation is required before subsequent mold opening, resulting in low production efficiency. Summary of the Utility Model

[0003] (1) Technical Problems to be Solved

[0004] In view of the problems existing in the prior art, the utility model provides a mold clamping mechanism for an injection molding machine to solve the technical problems mentioned in the background art.

[0005] (2) Technical Solutions

[0006] To achieve the above object, the utility model provides the following technical solutions: A mold clamping mechanism for an injection molding machine includes a fixed mold and a moving mold. A first fixed frame is fixedly welded outside the fixed mold, and a second fixed frame is fixedly welded outside the moving mold. A mold clamping device and a driving device are provided outside the first fixed frame and the second fixed frame. The mold clamping device includes a first moving block and a second moving block. First chamfers are provided at the edges of the lower surface of the first fixed frame, and second chamfers are provided at the edges of the upper surface of the second fixed frame. Third chamfers and fourth chamfers that cooperate with the first chamfers and the second chamfers are provided inside the first moving block and the second moving block. Both the first moving block and the second moving block are connected to the driving device. The driving device includes a support plate, a first vertical plate, a second vertical plate, support legs, a driving oil cylinder, and a linkage mechanism. A connecting block is provided at the telescopic end of the driving oil cylinder, and the connecting block is fixedly connected to the first moving block. The first moving block and the second moving block are connected through the linkage mechanism.

[0007] The present utility model is further configured such that the linkage mechanism includes a mounting shaft, a gear, a first rack, and a second rack. The mounting shaft is fixedly connected to the support plate. The gear is rotatably sleeved outside the mounting shaft. Both the first rack and the second rack are engaged with the gear. The first rack is slidably connected to the support plate, and one end of the first rack is fixedly connected to the first moving block. The second rack is slidably connected to the support plate, and one end of the second rack is slidably connected to the second moving block.

[0008] The present utility model is further configured such that the first vertical plate and the second vertical plate are respectively fixedly provided at both ends of the upper surface of the support plate, and the support legs are fixedly provided at the lower surface of the support plate.

[0009] The present utility model is further configured such that the driving oil cylinder is fixedly provided at one side of the first vertical plate and the support plate, and its telescopic end penetrates through the first vertical plate and the support plate and is fixedly connected to the connecting block.

[0010] The present utility model is further configured such that a first guiding rod is fixedly provided between the first vertical plate and the second vertical plate, a second guiding rod is fixedly provided on the support plate, and both the first moving block and the second moving block are slidably sleeved outside the first guiding rod and the second guiding rod.

[0011] The present utility model is further configured such that an avoidance groove for cooperating with the first moving block and the second moving block is provided on the upper surface of the support plate.

[0012] The present utility model is further configured such that a through groove is provided through the support plate, and the moving die, the fixed die, and the linkage mechanism are all provided in the through groove.

[0013] The present utility model is further configured such that two sets of the linkage mechanisms are provided, symmetrically arranged on both sides of the moving die, and both sets of the linkage mechanisms are connected to the first moving block and the second moving block.

[0014] (III) Advantageous Effects

[0015] Compared with the prior art, the present utility model provides a mold clamping mechanism for an injection molding machine, which has the following advantageous effects:

[0016] 1. A mold clamping device is provided in the present utility model. The first moving block and the second moving block approach the first fixed frame on the fixed die and the second fixed frame on the moving die simultaneously, and by continuously approaching, the moving die and the fixed die are pressed tightly together and locked.

[0017] 2. A driving device is provided in the present utility model. The driving oil cylinder can be extended to drive the first moving block to move, and the second moving block is driven to move simultaneously through the linkage mechanism. The moving die and the fixed die are clamped and fixed by the first moving block and the second moving block.

[0018] 3. The structure of the present utility model is simple and easy to operate. By driving the telescopic movement of the oil cylinder, the movement of the first moving block and the second moving block can be realized. When the first moving block and the second moving block approach each other, the mold clamping can be realized. When the first moving block and the second moving block move away from each other, the unlocking can be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of a mold clamping mechanism of an injection molding machine in the present utility model;

[0020] Figure 2 It is a schematic diagram of the structure of the mold clamping device and the driving device in the present utility model;

[0021] Figure 3 It is a schematic diagram of the structure of the fixed mold and the moving mold in the present utility model;

[0022] Figure 4 It is a schematic diagram of the structure of the support plate, the first vertical plate, the second vertical plate and the support legs in the present utility model;

[0023] Figure 5 It is a schematic diagram of the structure of the driving oil cylinder and the first moving block in the present utility model.

[0024] In the figure: 1. Fixed mold; 2. Moving mold; 3. First fixed frame; 4. Second fixed frame; 5. First moving block; 6. Second moving block; 7. First chamfer; 8. Second chamfer; 9. Third chamfer; 10. Fourth chamfer; 11. Support plate; 12. First vertical plate; 13. Second vertical plate; 14. Support legs; 15. Driving oil cylinder; 16. Connecting block; 17. Mounting shaft; 18. Gear; 19. First rack; 20. Second rack; 21. First guide rod; 22. Second guide rod; 23. Avoidance groove; 24. Through groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0026] It should be pointed out that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0027] In the present utility model, unless otherwise stated, the orientations such as "upper, lower" are usually in the directions shown in the drawings, or in the vertical, perpendicular or gravitational directions; similarly, for the convenience of understanding and description, "left, right" are usually in the left and right shown in the drawings; "inside, outside" refer to the inside and outside relative to the contour of each component itself, but the above orientation terms are not used to limit the present utility model.

[0028] See also Figures 1-5 , a locking mechanism of an injection molding machine, comprising a fixed mold 1 and a movable mold 2, the fixed mold 1 is fixedly welded with a first fixed frame 3 outside, the movable mold 2 is fixedly welded with a second fixed frame 4 outside, the first fixed frame 3 and the second fixed frame 4 are provided with a locking device and a driving device outside, the locking device comprises a first moving block 5 and a second moving block 6, the edge of the lower surface of the first fixed frame 3 is provided with a first chamfer 7, the edge of the upper surface of the second fixed frame 4 is provided with a second chamfer 8, the first moving block 5 and the second moving block 6 are both provided with a third chamfer 9 and a fourth chamfer 10 that cooperate with the first chamfer 7 and the second chamfer 8, the first moving block 5 and the second moving block 6 are both connected to the driving device, the driving device comprises a supporting plate 11, a first vertical plate 12, a second vertical plate 13, a supporting leg 14, a driving cylinder 15 and a linkage mechanism, the telescopic end of the driving cylinder 15 is provided with a connecting block 16, the connecting block 16 is fixedly connected to the first moving block 5, and the first moving block 5 and the second moving block 6 are connected through a linkage mechanism.

[0029] In this embodiment, the first fixed frame 3 is fixedly welded to the outside of the fixed mold 1, and the second fixed frame 4 is fixedly welded to the outside of the movable mold 2. When the first movable block 5 and the second movable block 6 are close to each other, the third chamfer 9 and the first chamfer 7 are fitted together, and the fourth chamfer 10 and the second chamfer 8 are fitted together, and the first movable block 5 and the second movable block 6 are continuously pressed inward, the first chamfer 7 is squeezed by the third chamfer 9, and the second chamfer 8 is squeezed by the fourth chamfer 10, so that the first fixed frame 3 and the second fixed frame 4 are tightly fitted to realize the locking operation of the movable mold 2 and the fixed mold 1. When the first movable block 5 and the second movable block 6 move away from each other and detach from the first fixed frame 3 and the second fixed frame 4, unlocking can be achieved. At this time, the movable mold 2 can be driven to move upward by the hydraulic equipment on the injection molding machine to realize mold opening.

[0030] See also Figures 1-5As an implementation of the driving device: the linkage mechanism includes a mounting shaft 17, a gear 18, a first rack 19 and a second rack 20. The mounting shaft 17 is fixedly connected to the support plate 11. The gear 18 is rotatably sleeved outside the mounting shaft 17. The first rack 19 and the second rack 20 are both meshed with the gear 18. The first rack 19 is slidably connected to the support plate 11, and one end of the first rack 19 is fixedly connected to the first moving block 5. The second rack 20 is slidably connected to the support plate 11, and one end of the second rack 20 is slidably connected to the second moving block 6. The first vertical plate 12 and the second vertical plate 13 are respectively fixedly arranged at both ends of the upper surface of the support plate 11, and the support leg 14 is fixedly arranged on the lower surface of the support plate 11. The driving cylinder 15 is fixedly arranged on one side of the first vertical plate 12 and the support plate 11, and its telescopic end passes through the first vertical plate 12 and the support plate 11 and is fixedly connected to the connecting block 16. A first guide rod 21 is fixedly provided between the first vertical plate 12 and the second vertical plate 13, a second guide rod 22 is fixedly provided on the support plate 11, and the first moving block 5 and the second moving block 6 are both slidably sleeved outside the first guide rod 21 and the second guide rod 22. An avoidance groove 23 cooperating with the first moving block 5 and the second moving block 6 is provided on the upper surface of the support plate 11. A through groove 24 is penetrated through the support plate 11, and the movable mold 2, the fixed mold 1 and the linkage mechanism are all arranged in the through groove 24. Two groups of linkage mechanisms are provided, which are symmetrically arranged on both sides of the movable mold 2, and the two groups of linkage mechanisms are connected to the first moving block 5 and the second moving block 6.

[0031] More specifically, the driving cylinder 15 is started to extend, driving the first moving block 5 to move inward. When the first moving block 5 moves, it drives the first rack 19 to move, and drives the gear 18 to rotate. The second rack 20 is moved through the gear 18, driving the second moving block 6 to approach the first moving block 5, and the fixed mold 1 and the movable mold 2 are locked by the first moving block 5 and the second moving block 6.

[0032] In summary, when the overall equipment is in use or running: the first fixed frame 3 is fixedly welded to the outside of the fixed mold 1, and the second fixed frame 4 is fixedly welded to the outside of the movable mold 2. When the first movable block 5 and the second movable block 6 are close to each other, the third chamfer 9 and the first chamfer 7 are fitted together, and the fourth chamfer 10 and the second chamfer 8 are fitted together, and the first movable block 5 and the second movable block 6 are continuously pressed inward, and the first chamfer 7 is squeezed by the third chamfer 9, and the second chamfer 8 is squeezed by the fourth chamfer 10, so that the first fixed frame 3 and the second fixed frame 4 are tightly fitted to realize the locking operation of the movable mold 2 and the fixed mold 1. When the first movable block 5 and the second movable block 6 move away from each other and disengage from the first fixed frame 3 and the second fixed frame 4, unlocking can be achieved. At this time, the movable mold 2 can be driven to move upward by the hydraulic equipment on the injection molding machine to realize mold opening.

[0033] Start the driving cylinder 15 to extend it, driving the first moving block 5 to move inward. When the first moving block 5 moves, it drives the first rack 19 to move, and drives the gear 18 to rotate. The second rack 20 is driven to move through the gear 18, and the second moving block 6 is driven to approach the first moving block 5. The fixed mold 1 and the movable mold 2 are locked by the first moving block 5 and the second moving block 6.

[0034] In all the schemes mentioned above, the connection between two parts can be selected according to actual conditions by welding, bolt and nut matching connection, bolt or screw connection or other well-known connection methods, which are not described here one by one. In the above, all fixed connections are preferably welded. Although the embodiments of the utility model have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. An injection molding machine clamping mechanism, comprising a fixed mold (1) and a movable mold (2). A first fixed frame (3) is fixedly welded outside the fixed mold (1), and a second fixed frame (4) is fixedly welded outside the movable mold (2). The characteristics are as follows: A clamping device and a driving device are provided outside the first fixed frame (3) and the second fixed frame (4). The clamping device includes a first moving block (5) and a second moving block (6). A first chamfer (7) is provided at the edge of the lower surface of the first fixed frame (3), and a second chamfer (8) is provided at the edge of the upper surface of the second fixed frame (4). Third chamfers (9) and fourth chamfers (10) that cooperate with the first chamfer (7) and the second chamfer (8) are provided inside both the first moving block (5) and the second moving block (6). The first moving block (5) and the second moving block (6) are both connected to the driving device. The driving device includes a support plate (11), a first vertical plate (12), a second vertical plate (13), support legs (14), a driving oil cylinder (15) and a linkage mechanism. A connecting block (16) is provided at the telescopic end of the driving oil cylinder (15). The connecting block (16) is fixedly connected to the first moving block (5). The first moving block (5) and the second moving block (6) are connected by the linkage mechanism.

2. The injection molding machine clamping mechanism according to claim 1, characterized in that: The linkage mechanism includes a mounting shaft (17), a gear (18), a first rack (19) and a second rack (20). The mounting shaft (17) is fixedly connected to the support plate (11). The gear (18) is rotatably sleeved outside the mounting shaft (17). Both the first rack (19) and the second rack (20) are engaged with the gear (18). The first rack (19) is slidably connected to the support plate (11), and one end of the first rack (19) is fixedly connected to the first moving block (5). The second rack (20) is slidably connected to the support plate (11), and one end of the second rack (20) is slidably connected to the second moving block (6).

3. The injection molding machine clamping mechanism according to claim 1, characterized in that: The first vertical plate (12) and the second vertical plate (13) are respectively fixedly provided at both ends of the upper surface of the support plate (11). The support legs (14) are fixedly provided on the lower surface of the support plate (11).

4. The injection molding machine clamping mechanism according to claim 3, characterized in that: The driving oil cylinder (15) is fixedly provided on one side of the first vertical plate (12) and the support plate (11), and its telescopic end penetrates through the first vertical plate (12) and the support plate (11) and is fixedly connected to the connecting block (16).

5. The injection molding machine clamping mechanism according to claim 3, characterized in that: A first guide rod (21) is fixedly provided between the first vertical plate (12) and the second vertical plate (13). A second guide rod (22) is fixedly provided on the support plate (11). Both the first moving block (5) and the second moving block (6) are slidably sleeved outside the first guide rod (21) and the second guide rod (22).

6. The injection molding machine clamping mechanism according to claim 1, characterized in that: An avoidance groove (23) that cooperates with the first moving block (5) and the second moving block (6) is provided on the upper surface of the support plate (11).

7. The injection molding machine clamping mechanism according to claim 2, characterized in that: A through groove (24) is provided through the support plate (11). The moving die (2), the fixed die (1) and the linkage mechanism are all provided in the through groove (24).

8. The injection molding machine clamping mechanism according to claim 7, characterized in that: Two sets of the linkage mechanisms are provided, symmetrically arranged on both sides of the moving die (2), and both sets of the linkage mechanisms are connected to the first moving block (5) and the second moving block (6).

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