Mold closing positioning structure for injection mold

Abstract

The utility model discloses a mold closing positioning structure for an injection mold. Comprising an oil cylinder fixedly mounted on a rack of an injection molding machine, a pushing end mounted in the oil cylinder and driven by the oil cylinder, a movable mold frame fixedly mounted at one end of the pushing end, a positioning connecting rod mechanism fixedly mounted on one side of the movable mold frame, and a movable mold plate and a fixed mold plate fixedly mounted on one side of the positioning connecting rod mechanism. And the movable mold plate and the fixed mold plate are connected and mounted through a positioning sliding mechanism. And a module group is mounted between the movable mold plate and the fixed mold plate. According to the utility model, the positioning prismatic table column is ensured not to shake and deviate in the sliding process, and the positioning accuracy and stability of the module group in the injection molding process are improved by matching with the positioning connecting rod mechanism.

Description

Technical Field

[0001] This utility model belongs to the field of injection molding machine technology, and specifically relates to a mold closing and positioning structure for injection molds. Background Technology

[0002] The function of the mold clamping system is to ensure that the molding die can be opened and closed flexibly, accurately, quickly, reliably, and safely. The molten plastic injected into the mold cavity by the injection system has a very high pressure, requiring the mold platen system to generate sufficient clamping force to ensure that the mold cavity is tightly closed and that the molten plastic does not overflow out of the mold cavity.

[0003] Domestic utility model patent application number 202321993687.4 discloses an anti-misalignment injection molding structure for automotive injection molded parts, relating to the field of injection mold technology. This anti-misalignment injection molding structure for automotive injection molded parts includes an upper mold base and a lower mold base coupled to the upper mold base, forming an injection cavity for molding automotive injection molded parts. A positioning element is fixedly installed at the bottom of the upper mold base, and a positioning rod and an ejector pin assembly that slides through the bottom of the injection cavity are installed on the lower mold base. After the upper and lower mold bases are closed, the positioning element is fitted onto the positioning rod, simultaneously pressing down on the ejector pin assembly. By installing a positioning element on the upper mold base and a positioning rod on the lower mold base, during mold closing, the positioning element is fitted onto the positioning rod to prevent misalignment. It also works in conjunction with existing guide mechanisms on the mold to prevent guide post scratches from affecting the mold closing of the upper and lower mold bases. Furthermore, the positioning element can be inserted into the ejector pin assembly, further achieving the anti-misalignment purpose. The aforementioned utility model achieves positioning by having the positioning element and the positioning rod cooperate with each other during the mold closing process. However, there is a certain gap between the sleeve rod and the positioning element during the mold closing and demolding movement. Even a slight wobbling may cause changes in the thickness of the mold during injection molding. The straight groove positioning also has the same problem. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a mold closing and positioning structure for injection molds, comprising a hydraulic cylinder fixedly mounted on the injection molding machine frame, a pushing end mounted inside the hydraulic cylinder and driven by the hydraulic cylinder, a moving mold frame fixedly mounted at one end of the pushing end, a positioning linkage mechanism fixedly mounted on one side of the moving mold frame, a moving template fixedly mounted on one side of the positioning linkage mechanism, and a fixed template. The moving template and the fixed template are connected and installed via a positioning sliding mechanism. A module assembly is installed between the moving template and the fixed template.

[0005] The moving mold frame is moved forward by the pushing end, so that the moving mold plate and the fixed mold plate cooperate to perform plastic injection molding on the module group.

[0006] As a further preferred technical solution of this utility model, the hydraulic cylinder is fixedly installed to the frame via a mounting base fixedly installed on one side. A connecting seat is fixedly installed on one side of the mounting base outside the hydraulic cylinder, and four sets of guide rods passing through the connecting seat are fixedly installed on the mounting base.

[0007] By connecting the push end to the mounting base and the connecting base, the stability of the hydraulic cylinder during use is ensured.

[0008] As a further preferred technical solution of this utility model, the positioning linkage mechanism includes mounting brackets at both ends, two sets of flipping brackets fixedly mounted on one side of the mounting brackets, auxiliary rods and connecting rods connected and mounted between the flipping brackets, and a positioning ring mounted between the two sets of auxiliary rods and connecting rods. The positioning ring has positioning holes, and the top and bottom of the positioning ring are connected to the auxiliary rods and connecting rods respectively via flipping blocks. A positioning pin is fixedly mounted on one side of one set of mounting brackets, and a limit block is fixedly mounted on one end of the positioning pin.

[0009] The locating ejector pins are installed inside the locating ring. During the pushing process of the mounting frame, the locating ejector pins provide guidance, and together with the positioning of the four sets of guide rods, they provide initial guidance for the mold. Furthermore, the connecting rods, auxiliary rods, and locating rings connected between the mounting frames provide a buffered pushing process, ensuring the stability of the moving platen during mold closing.

[0010] As a further preferred technical solution of this utility model, the module group includes a movable module fixedly installed on the movable template and a fixed module fixedly installed on the fixed template. The fixed module has an injection channel. The fixed template has a main channel for injection that cooperates with the injection channel.

[0011] The plastic raw material particles are heated by the injection structure and melted into a viscous semi-fluid liquid. The liquid is then injected into the main channel through the injection port and introduced into the fixed module through the injection channel, where it cooperates with the moving module for injection molding.

[0012] As a further preferred technical solution of this utility model, fixing blocks are fixedly installed at the top and bottom of one side of the moving template. The positioning sliding mechanism includes a connecting end fixedly installed on the fixing block, a positioning frustum column integrally installed with the connecting end, and positioning guide sleeves fixedly installed on the fixed template at the top and bottom of the fixed template. The positioning guide sleeve has a frustum groove inside. And the positioning frustum column is slidably installed on the frustum groove.

[0013] Due to the shape of the positioning frustum and the frustum groove, the end of the positioning frustum cannot detach from the positioning guide sleeve. During the sliding process, the positioning frustum is basically in contact with the inner wall of the positioning guide sleeve. With the end locking state, it is ensured that the positioning frustum does not shake or deviate during the sliding process. This, together with the positioning linkage mechanism, improves the positioning accuracy and stability of the module group during the injection molding process.

[0014] As a further preferred technical solution of this utility model, the moving mold frame, the mounting frame, and the moving template all slide through the guide rod. Four sets of fixedly installed guide sleeves are arranged on the mounting frame, passing through the guide rod.

[0015] The moving mold frame, mounting frame, and moving template all slide through guide rods, which facilitates basic guidance of the moving template during the injection molding process.

[0016] Beneficial effects

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. Due to the shape of the positioning frustum and the frustum groove, the end of the positioning frustum cannot detach from the positioning guide sleeve. During the sliding process, the positioning frustum is basically in contact with the inner wall of the positioning guide sleeve. With the end locking state, it is ensured that the positioning frustum does not wobble or deviate during the sliding process. Mold closing is a key step in the product shaping process of injection molding. During the sliding process, the outer side of the positioning frustum progressively rubs against the inner wall of the positioning guide sleeve, thereby reducing the gap between the two. This reduces the slight wobble and displacement caused by the internal gap during the mold closing process. In conjunction with the positioning linkage mechanism, this improves the positioning accuracy and stability of the module group during the injection molding process.

[0019] 2. Positioning ejector pins are installed inside the positioning ring. During the pushing process of the mounting frame, the positioning ejector pins provide guidance, and together with the positioning of four sets of guide rods, they provide initial guidance for the mold. Furthermore, the connecting rods, auxiliary rods, and positioning rings between the mounting frames provide a buffered pushing action, ensuring a stable mold closing effect for the moving platen. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the positioning linkage mechanism of this utility model;

[0022] Figure 3 for Figure 2 Enlarged structural diagram at point A;

[0023] Figure 4This is a cross-sectional structural diagram of the positioning sliding mechanism of this utility model.

[0024] In the diagram: 1. Hydraulic cylinder; 11. Mounting base; 12. Pushing end; 13. Connecting base; 2. Moving mold frame; 21. Guide rod; 3. Positioning linkage mechanism; 31. Mounting frame; 32. Tilting frame; 33. Guide sleeve; 34. Positioning ejector pin; 35. Connecting rod; 36. Auxiliary rod; 37. Tilting block; 38. Positioning ring; 381. Positioning hole; 39. Limiting block; 4. Moving template; 41. Fixing block; 5. Module group; 51. Moving module; 52. Fixed module; 53. Injection channel; 6. Fixed template; 61. Main channel; 7. Positioning sliding mechanism; 71. Connecting end; 72. Positioning frustum; 73. Positioning guide sleeve; 74. Frustum groove. Detailed Implementation

[0025] This specific embodiment is a mold closing and positioning structure for injection molds.

[0026] The aforementioned utility model achieves positioning by having the positioning element and the positioning rod cooperate with each other during the mold closing process. However, there is a certain gap between the sleeve rod and the positioning element during the mold closing and demolding movement. Even a slight wobbling may cause changes in the thickness of the mold during injection molding. The straight groove positioning also has the same problem.

[0027] Its structural diagram is as follows Figures 1-4As shown. A mold closing and positioning structure for injection molds includes a hydraulic cylinder 1 fixedly mounted on the frame of an injection molding machine. The hydraulic cylinder 1 is fixedly mounted to the frame via a mounting base 11 fixedly mounted on one side. A connecting seat 13 is fixedly mounted on one side of the mounting base 11 outside the hydraulic cylinder 1, and four sets of guide rods 21 passing through the connecting seat 13 are fixedly mounted on the mounting base 11. The mounting base 11 and the connecting seat 13 are connected by a push end 12 to ensure the stability of the hydraulic cylinder 1 during use. It also includes a push end 12 installed inside the hydraulic cylinder 1 and driven by the hydraulic cylinder 1, a moving mold frame 2 fixedly mounted on one end of the push end 12, and a positioning linkage mechanism 3 fixedly mounted on one side of the moving mold frame 2. The positioning linkage mechanism 3 includes mounting frames 31 at both ends, two sets of flipping frames 32 fixedly mounted on one side of the mounting frame 31, auxiliary rods 36 and connecting rods 35 connected between the flipping frames 32, and a positioning ring 38 installed between the two sets of auxiliary rods 36 and connecting rods 35. The positioning ring 38 has a positioning hole 381, and its top and bottom are connected to the auxiliary rod 36 and connecting rod 35 respectively via a flipping block 37. A positioning ejector pin 34 is fixedly installed on one side of a set of mounting brackets 31, and a limit block 39 is fixedly installed on one end of the positioning ejector pin 34. The positioning ejector pin 34 is installed inside the positioning ring 38, and during the pushing process of the mounting bracket 31, it is guided by the positioning ejector pin 34, which, together with the positioning of the four sets of guide rods 21, has a preliminary guiding effect on the mold. The connecting rod 35, auxiliary rod 36, and positioning ring 38 connected between the mounting brackets 31 provide a buffered pushing effect, ensuring the stability of the moving platen 4 during mold closing. It also includes a moving platen 4 and a fixed platen 6 fixedly installed on one side of the positioning linkage mechanism 3. The moving platen 4 and the fixed platen 6 are connected and installed through a positioning sliding mechanism 7. A module group 5 is installed between the moving platen 4 and the fixed platen 6. The module group 5 includes a moving module 51 fixedly installed on the moving platen 4 and a fixed module 52 fixedly installed on the fixed platen 6. The fixed module 52 has an injection channel 53. The fixed template 6 has a main channel 61 that cooperates with the injection channel 53 for injection. The plastic raw material particles are heated by the injection structure and melted into a viscous semi-fluid liquid. The liquid is then injected into the main channel 61 through the injection port and introduced into the fixed module 52 through the injection channel 53, where it cooperates with the moving module 51 for injection molding.

[0028] Fixed blocks 41 are fixedly installed on the top and bottom of one side of the moving template 4. The positioning sliding mechanism 7 includes a connecting end 71 fixedly installed on the fixed block 41, a positioning frustum 72 integrally installed with the connecting end 71, and positioning guide sleeves 73 fixedly installed on the fixed template 6 at the top and bottom of the fixed module 52. The positioning guide sleeve 73 has a frustum groove 74 inside. The positioning frustum 72 is slidably installed on the frustum groove 74. Due to the shape of the positioning frustum prism 72 and the frustum groove 74, the end of the positioning frustum prism 72 cannot disengage from the positioning guide sleeve 73. During the sliding process, the positioning frustum prism 72 is basically in contact with the inner wall of the positioning guide sleeve 73. With the end locking state, it is ensured that the positioning frustum prism 72 does not wobble or deviate during the sliding process. Mold closing is a key step in the product shaping process during injection molding. During the sliding process, the outer side of the positioning frustum progressively rubs against the inner wall of the positioning guide sleeve, thereby reducing the gap between them. This reduces the slight wobble and displacement caused by the internal gap during mold closing, thus improving the positioning accuracy and stability of the module group 5 during injection molding in conjunction with the positioning linkage mechanism 3. The moving mold frame 2, the mounting frame 31, and the moving template 4 all slide through the guide rod 21. The mounting frame 31 is equipped with four sets of fixedly installed guide sleeves 33 that pass through the guide rod 21. By having the moving mold frame 2, the mounting frame 31, and the moving template 4 all slide through the guide rod 21, it is convenient to provide basic guidance for the moving template 4 during the injection molding mold closing process.

[0029] First, the moving mold frame 2 is moved forward by the pushing end 12, causing the moving mold plate 4 and the fixed mold plate 6 to cooperate. The plastic raw material particles are heated by the injection structure and melted into a viscous semi-fluid liquid. The liquid is then injected into the main runner 61 through the injection port and introduced into the fixed mold plate 52 through the injection channel 53, where it cooperates with the moving mold plate 51 for injection molding. During the demolding and mold closing process, the positioning ejector pins 34 provide guidance, and the positioning of the four sets of guide rods 21 provides initial guidance for the mold. The connecting rods 35, auxiliary rods 36, and positioning rings 38 connected between the mounting brackets 31 provide buffering and propulsion, ensuring the stability of the moving mold plate 4 during mold closing. During the sliding process, the positioning frustum 72 is basically in contact with the inner wall of the positioning guide sleeve 73. With the end locking state, the positioning frustum 72 is prevented from shaking or deviating during the sliding process. This, together with the positioning linkage mechanism 3, improves the positioning accuracy and stability of the module group 5 during injection molding.

[0030] All technical features in this embodiment can be freely combined according to actual needs.

[0031] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A clamp positioning structure for an injection mold, characterized by, The utility model provides an injection mould movable die set, including fixedly installed oil cylinder (1) on injection molding machine frame, install the pushing end (12) in oil cylinder (1) inside and drive through oil cylinder (1), fixedly installed movable die set (2) one end of pushing end (12), fixedly installed positioning connecting rod mechanism (3) one side of movable die set (2), fixedly installed movable die plate (4) one side of positioning connecting rod mechanism (3) and fixed die plate (6), movable die plate (4) and fixed die plate (6) between through positioning sliding mechanism (7) connection installation, install module group (5) between movable die plate (4) and fixed die plate (6).

2. A clamp positioning structure for an injection mold according to claim 1, characterized in that: The oil cylinder (1) is fixedly installed with the rack through the fixedly installed mounting seat (11) on one side, the connecting seat (13) is fixedly installed on the outside of the oil cylinder (1) on one side of the mounting seat (11), and four guide rods (21) penetrating through the connecting seat (13) are fixedly installed on the mounting seat (11).

3. A clamp positioning structure for an injection mold according to claim 2, wherein: The positioning connecting rod mechanism (3) comprises two ends of mounting racks (31), two groups of turnover racks (32) fixedly installed on one side of the mounting racks (31), auxiliary rods (36) and connecting rods (35) connected and installed between the turnover racks (32), and a positioning ring (38) installed between the two groups of auxiliary rods (36) and the connecting rods (35), wherein a positioning hole (381) is formed in the positioning ring (38), and the top and bottom of the positioning ring (38) are connected and installed between the auxiliary rods (36) and the connecting rods (35) through turnover blocks (37), respectively, a positioning thimble (34) is fixedly installed on one side of one of the mounting racks (31), and a limiting block (39) is fixedly installed at one end of the positioning thimble (34).

4. A clamp positioning structure for an injection mold according to claim 3, wherein: The module group (5) comprises movable modules (51) fixedly installed on the movable die plate (4) and fixed modules (52) fixedly installed on the fixed die plate (6), the fixed modules (52) are provided with injection channels (53), and the fixed die plate (6) is provided with main runners (61) matched with the injection channels (53) for injection.

5. A clamp positioning structure for an injection mold according to claim 4, wherein: The top and bottom of one side of the movable die plate (4) are fixedly installed with fixed blocks (41), the positioning sliding mechanism (7) comprises a connecting end (71) fixedly installed on the fixed block (41), a positioning prism column (72) integrally installed with the connecting end (71), and a positioning guide sleeve (73) fixedly installed on the fixed die plate (6) and located at the top and bottom of the fixed module (52), wherein a prism groove (74) is arranged in the positioning guide sleeve (73), and the positioning prism column (72) is slidably installed in the prism groove (74).

6. A clamp positioning structure for an injection mold according to claim 5, wherein: The movable die set (2), the mounting rack (31) and the movable die plate (4) all slidably penetrate through the guide rods (21), and the mounting rack (31) is provided with four guide sleeves (33) fixedly installed and penetrating through the guide rods (21).

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