Mold locking mechanism of injection molding machine

Abstract

The utility model discloses a mold locking mechanism of an injection molding machine, which belongs to the field of injection molding machines and comprises an injection molding machine platform, a fixed mold is fixedly connected to the top of the injection molding machine platform, a movable mold is slidably connected to the top of the injection molding machine platform, a clamping block is fixedly connected to the outer wall of the movable mold, and an extrusion block is fixedly connected to the outer wall of the movable mold. A mold locking mechanism is arranged on the outer wall of the fixed mold; through the arrangement of the movable mold, the fixed mold, the extrusion block, the stress block, the sliding rods, the embedding blocks, the clamping block and the lap joint block, when the two sliding rods respectively drive the embedding blocks to be close to each other to a certain position, the clamping block is also clamped into the lap joint block, and the two embedding blocks close to each other can be clamped into the clamping block; therefore, the purpose of locking the movable mold and the fixed mold is achieved, the movable mold and the fixed mold are prevented from being opened by force generated when raw materials are injected into a mold cavity at high pressure in the injection molding process, and the situation that the injection molding quality is affected due to elastic deformation of the movable mold is avoided.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine technology, specifically an injection molding machine clamping mechanism. Background Technology

[0002] Disposable products typically refer to a class of inexpensive, non-durable items that are used only once. Disposable products that provide convenience include disposable plastic bags, fast food containers, paper cups, and disposable chopsticks. Currently, the production of disposable lunch boxes and disposable cups requires the use of injection molding machines to mold thermoplastic or thermosetting plastics into various shapes of plastic products using plastic molding molds.

[0003] An investigation revealed that a Chinese utility model patent discloses an injection molding machine for the production of disposable lunch boxes (publication number: CN213291126U), comprising a machine body, an internal pushing device and an injection molding device, a controller mounted on one side wall of the machine body, an mounting plate mounted on the top of the machine body, a through hole in the surface wall of the mounting plate, a bracket mounted on the top of the mounting plate, and a drive wheel rotatably connected to one end of the bracket away from the mounting plate via a rotating shaft.

[0004] In the aforementioned patent, although compared with the prior art, the stirring blades are driven by the first electric motor to stir and churn the materials back and forth in the inner cylinder, preventing them from sticking together and affecting the injection molding, and the inner cylinder surface is provided with ventilation holes, which, together with the air inlet and outlet fans on the outer cylinder surface, can enhance the air circulation inside the inner cylinder and prevent internal humidity and heat from affecting the injection molding quality, most of the injection molding machines used for the production of disposable lunch boxes in the prior art usually do not have a mold-locking function. This results in a mold-opening force when the raw material is injected into the mold cavity under high pressure during the injection molding process, which may cause the mold to be opened, thereby causing elastic deformation of the moving mold and affecting the injection molding quality.

[0005] Therefore, this utility model provides a mold clamping mechanism for an injection molding machine to solve the above problems. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] This utility model provides a mold clamping mechanism for an injection molding machine, which aims to solve the problems mentioned in the background art.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the present invention provides the following technical solution: a molding machine clamping mechanism, comprising an injection molding machine platform, a fixed mold fixedly connected to the top of the injection molding machine platform, a movable mold slidably connected to the top of the injection molding machine platform, a locking block fixedly connected to the outer wall of the movable mold, an extrusion block fixedly connected to the outer wall of the movable mold, and a clamping mechanism provided on the outer wall of the fixed mold.

[0010] The mold-locking mechanism includes an overlapping block fixedly connected to the outer wall of the fixed mold, a sliding rod slidably connected to the outer wall of the fixed mold, an embedded block fixedly connected to one end of the sliding rod near the overlapping block, a force-receiving block in contact with the extrusion block fixedly connected to one end of the sliding rod away from the embedded block, a spring fixedly connected to the outer wall of the force-receiving block, and the end of the spring away from the force-receiving block fixedly connected to the outer wall of the fixed mold, with the sliding rod inserted through the inner ring of the spring.

[0011] As a preferred technical solution of this application, the outer wall of the extrusion block and the force-bearing block are obliquely fitted, the bottom of the embedding block is obliquely set, and the interior of the overlapping block is provided with a first through hole for the locking block and the embedding block to be engaged.

[0012] As a preferred technical solution of this application, the card block has a second through hole for the insert block to be inserted, and the top of the fixed mold has a placement groove for the extrusion block to move.

[0013] As a preferred technical solution of this application, a first rack is fixedly connected to the outer wall of the moving mold, and a gear that meshes with the first rack is rotatably connected to the top of the injection molding machine platform.

[0014] As a preferred technical solution of this application, a second rack is meshed on the gear, and a protective cover is fixedly connected to the outer wall of the second rack.

[0015] As a preferred technical solution of this application, the bottom of the protective cover is fixedly connected to the top of the injection molding machine platform, and the protective cover is telescopic and adjustable.

[0016] As a preferred technical solution of this application, a telescopic rod is fixedly connected to the bottom of the second rack, and the end of the telescopic rod away from the second rack is fixedly connected to the inside of the injection molding machine platform.

[0017] (III) Beneficial Effects

[0018] This invention, through the arrangement of a moving mold, a fixed mold, extrusion blocks, force-bearing blocks, sliding rods, insert blocks, locking blocks, and overlapping blocks, allows the two extrusion blocks to move downwards simultaneously when the moving mold drives the locking blocks to contact the two force-bearing blocks on the fixed mold. This causes the two extrusion blocks to squeeze the two force-bearing blocks, causing them to drive the sliding rods closer together. When the two sliding rods drive the insert blocks closer together to a certain position, the locking blocks also engage with the overlapping blocks. This locks the moving mold and the fixed mold, preventing the force generated by the high-pressure injection of raw materials into the mold cavity during the injection molding process from opening the moving mold and the fixed mold, thus avoiding elastic deformation of the moving mold that could affect the quality of the injection molding. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the mold clamping mechanism of an injection molding machine;

[0020] Figure 2 This is a schematic diagram of the moving mold and the fixed mold in the mold clamping mechanism of an injection molding machine;

[0021] Figure 3 This is a schematic diagram of the structure of a protective cover in the mold clamping mechanism of an injection molding machine;

[0022] Figure 4 for Figure 1 A magnified structural diagram at point A;

[0023] Figure 5 for Figure 2 A magnified structural diagram at point B;

[0024] In the picture:

[0025] 1. Injection molding machine platform; 2. Fixed mold; 3. Moving mold; 4. Clamping block; 5. Extrusion block; 6. Overlapping block; 7. Sliding rod; 8. Embedded block; 9. Force-bearing block; 10. Spring; 11. First through hole; 12. Second through hole; 13. Placement slot; 14. First rack; 15. Gear; 16. Second rack; 17. Protective cover; 18. Telescopic rod. Detailed Implementation

[0026] 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.

[0027] This utility model provides a mold clamping mechanism for an injection molding machine, such as... Figure 1-5 As shown, the injection molding machine includes an injection molding machine platform 1, a fixed mold 2 is fixedly connected to the top of the injection molding machine platform 1, a movable mold 3 is slidably connected to the top of the injection molding machine platform 1, a locking block 4 is fixedly connected to the outer wall of the movable mold 3, an extrusion block 5 is fixedly connected to the outer wall of the movable mold 3, and a mold locking mechanism is provided on the outer wall of the fixed mold 2.

[0028] The mold clamping mechanism includes an overlapping block 6 fixedly connected to the outer wall of the fixed mold 2, a sliding rod 7 slidably connected to the outer wall of the fixed mold 2, an embedded block 8 fixedly connected to the end of the sliding rod 7 near the overlapping block 6, a force-bearing block 9 that contacts the extrusion block 5 fixedly connected to the end of the sliding rod 7 away from the embedded block 8, a spring 10 fixedly connected to the outer wall of the force-bearing block 9, and the end of the spring 10 away from the force-bearing block 9 fixedly connected to the outer wall of the fixed mold 2, with the sliding rod 7 inserted into the inner ring of the spring 10.

[0029] The outer walls of the extrusion block 5 and the force-bearing block 9 are obliquely fitted, the bottom of the embedding block 8 is obliquely set, and the interior of the overlapping block 6 is provided with a first through hole 11 for the locking block 4 and the embedding block 8 to be inserted.

[0030] The card block 4 has a second through hole 12 for the insert block 8 to be inserted, and the top of the fixed mold 2 has a placement groove 13 for the extrusion block 5 to move.

[0031] Specifically, when this device is used to injection mold thermoplastic or thermosetting plastics to form disposable lunch boxes and disposable cups, the moving mold 3 first moves the locking block 4 downwards. During this downward movement, the two extrusion blocks 5 move downwards simultaneously. As the locking block 4 is about to be inserted into the overlapping block 6 through the first through hole 11, the two extrusion blocks 5 also compress the two force-bearing blocks 9. When the two force-bearing blocks 9 are compressed by the two extrusion blocks 5, their oblique fit allows them to move the sliding rods 7 closer together. This causes the two sliding rods 7 to move the embedded blocks 8 closer together, and the locking block 4 is then inserted into the overlapping block 6. Simultaneously, the two embedded blocks 8, which are moving closer together, are also inserted into the locking block 4 through the second through hole 12. This locking of the moving mold 3 and the fixed mold 2 prevents the force generated by the high-pressure injection of raw material into the mold cavity during the injection molding process from separating the moving mold 3 and the fixed mold 2, thus avoiding elastic deformation of the moving mold 3. This affects the quality of injection molding. After injection molding is completed, the moving mold 3 can move upward, causing the moving mold 3 to drive the clamping block 4 to move upward. The clamping block 4 uses the inclined shape of the bottom of the insert block 8 to allow the clamping block 4 to squeeze the insert block 8 to move upward smoothly, preventing the clamping block 4 from being restricted by the insert block 8 and unable to move upward. When the clamping block 4 separates from the insert block 8, the two extrusion blocks 5 can also move upward and separate from the two force blocks 9. When the two force blocks 9 are not squeezed by the extrusion blocks 5, they can drive the slide rod 7 respectively and use the elastic force of the spring 10 to move away from each other, so that the two insert blocks 8 can be reset, which is convenient for the next mold locking. This makes the mold locking of the moving mold 3 and the fixed mold 2 convenient and quick, and the separation is also quick. The placement groove 13 gives the extrusion block 5 enough room to move. When the extrusion block 5 moves downward to squeeze the force block 9, the extrusion block 5 will not be blocked by the injection molding machine platform 1, so it can continue to move downward to squeeze the force block 9, thus ensuring that the insert block 8 can be smoothly locked into the clamping block 4.

[0032] The outer wall of the moving mold 3 is fixedly connected to a first rack 14, and the top of the injection molding machine platform 1 is rotatably connected to a gear 15 that meshes with the first rack 14.

[0033] A second rack 16 meshes with the gear 15, and a protective cover 17 is fixedly connected to the outer wall of the second rack 16.

[0034] The bottom of the protective cover 17 is fixedly connected to the top of the injection molding machine platform 1, and the protective cover 17 is telescopic and adjustable.

[0035] A telescopic rod 18 is fixedly connected to the bottom of the second rack 16, and the end of the telescopic rod 18 away from the second rack 16 is fixedly connected to the inside of the injection molding machine platform 1.

[0036] Specifically, as the moving mold 3 moves downward, it drives the first rack 14 to move downward synchronously, causing the gear 15 meshing with the first rack 14 to rotate. When the gear 15 rotates, the second rack 16 meshing with the gear 15 drives the telescopic protective cover 17 to move upward. This causes the protective cover 17 to move upward to a certain height along with the downward movement of the moving mold 3, forming a certain enclosure. This prevents some thermoplastic or thermosetting plastics from splashing onto nearby workers due to the temperature generated during injection molding, thus ensuring the safety of the surrounding workers. Furthermore, the telescopic rod 18 provides a fixed point for the second rack 16, and the telescopic characteristics of the telescopic rod 18 allow the second rack 16 to move smoothly up and down when rotated by the gear 15, preventing instability caused by the second rack 16 relying solely on the support of the protective cover 17.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A mold clamping mechanism for an injection molding machine, comprising an injection molding machine platform (1), characterized in that: The top of the injection molding machine platform (1) is fixedly connected to a fixed mold (2), the top of the injection molding machine platform (1) is slidably connected to a moving mold (3), the outer wall of the moving mold (3) is fixedly connected to a locking block (4), the outer wall of the moving mold (3) is fixedly connected to an extrusion block (5), and the outer wall of the fixed mold (2) is provided with a mold locking mechanism. The mold-locking mechanism includes an overlapping block (6) fixedly connected to the outer wall of the fixed mold (2). A slide rod (7) is slidably connected to the outer wall of the fixed mold (2). An embedded block (8) is fixedly connected to one end of the slide rod (7) near the overlapping block (6). A force-bearing block (9) that contacts the extrusion block (5) is fixedly connected to one end of the slide rod (7) away from the embedded block (8). A spring (10) is fixedly connected to the outer wall of the force-bearing block (9). The end of the spring (10) away from the force-bearing block (9) is fixedly connected to the outer wall of the fixed mold (2). The slide rod (7) is inserted into the inner ring of the spring (10).

2. The injection molding machine clamping mechanism according to claim 1, characterized in that: The outer wall of the extrusion block (5) is obliquely fitted to the outer wall of the force-bearing block (9), the bottom of the embedding block (8) is obliquely set, and the interior of the overlapping block (6) is provided with a first through hole (11) for the locking block (4) and the embedding block (8) to be inserted.

3. The injection molding machine clamping mechanism according to claim 1, characterized in that: The card block (4) has a second through hole (12) inside for the insert block (8) to be inserted into, and the top of the fixed mold (2) has a placement groove (13) for the extrusion block (5) to move.

4. The injection molding machine clamping mechanism according to claim 1, characterized in that: The outer wall of the moving mold (3) is fixedly connected to a first rack (14), and the top of the injection molding machine platform (1) is rotatably connected to a gear (15) that meshes with the first rack (14).

5. The injection molding machine clamping mechanism according to claim 4, characterized in that: A second rack (16) meshes with the gear (15), and a protective cover (17) is fixedly connected to the outer wall of the second rack (16).

6. The injection molding machine clamping mechanism according to claim 5, characterized in that: The bottom of the protective cover (17) is fixedly connected to the top of the injection molding machine platform (1), and the protective cover (17) is telescopic and adjustable.

7. The injection molding machine clamping mechanism according to claim 5, characterized in that: A telescopic rod (18) is fixedly connected to the bottom of the second rack (16), and the end of the telescopic rod (18) away from the second rack (16) is fixedly connected to the inside of the injection molding machine platform (1).

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