A mold clamping device

Abstract

The utility model relates to a mould locking device, including a pair of upper fixed frame, a pair of lower fixed frame and a middle balance frame, the top of upper fixed frame is fixed on the frame of mould closing, the upper die frame is slidably installed on the frame, the bottom of upper fixed frame is hinged with first movable frame, the bottom of lower fixed frame is fixed on the upper die frame, the top of lower fixed frame is hinged with second movable frame, the bottom of first movable frame and the top of second movable frame are hinged, the middle balance frame is installed in the piston end of lifting hydraulic cylinder, and a plurality of first connecting rods are hingedly installed between the both ends of middle balance frame and two first movable frames respectively. The mould locking device lowers the upper die through lifting hydraulic cylinder, after closing, the lower die is sent up by balance cylinder, so that the upper die and the lower die can be completely closed tightly, thereby avoiding material leakage.

Description

Technical Field

[0001] This utility model specifically relates to a mold locking device. Background Technology

[0002] Currently, molds are various molds and tools used in industrial production to obtain desired products through injection molding, blow molding, extrusion, die casting, forging, smelting, stamping, and other methods. These tools are composed of various parts, and different molds are composed of different parts. They mainly achieve the processing of the object's shape by changing the physical state of the material being molded. The molds used in compression molding generally consist of an upper mold and a lower mold. Currently, existing molds already possess good processing capabilities; however, conventional molds typically close with a unidirectional force, and the impact during mold closing can easily damage the mold. Damaged molds may experience loose mold closure, leading to material leakage. Utility Model Content

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a mold locking device.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a mold locking device, including a pair of upper fixed frames, a pair of lower fixed frames and a middle balancing frame. The top of the upper fixed frames is fixed to the mold closing frame. An upper mold frame is slidably installed on the frame. A first movable frame is hinged to the bottom of the upper fixed frames. The bottom of the lower fixed frames is fixed to the upper mold frame. A second movable frame is hinged to the top of the lower fixed frames. The bottom of the first movable frame and the top of the second movable frame are hinged together. The middle balancing frame is installed at the piston end of the lifting hydraulic cylinder. Multiple first connecting rods are hinged between the two ends of the middle balancing frame and the two first movable frames.

[0005] Preferably, the frame is equipped with multiple guide columns, and an upper mold frame is slidably mounted on the guide columns. At least one upper mold is mounted on the bottom of the upper mold frame, and a corresponding lower mold is located directly below the upper mold. The lower mold is mounted on the top of a balance cylinder, which is mounted on the bottom of the frame. A lifting hydraulic cylinder for controlling the raising and lowering of the upper mold frame is mounted on the top of the frame, and a balancing mechanism is provided between the frame and the upper mold frame.

[0006] Preferably, two guide rods are symmetrically arranged between the machine frame and the upper mold frame, and a center balance frame passes through the middle of the guide rods.

[0007] Preferably, a limiting post is movably installed inside the upper mold, and a through hole is provided inside the upper mold for the limiting post to move. A first limiting plate for the limiting post to pass through is fixedly installed inside the through hole, and a limiting groove corresponding to the limiting post is provided on the lower mold.

[0008] Preferably, the lower end of the limiting post has a circular head, the middle of the limiting post has a first limiting block, a double-sided frustum is movably fitted between the circular head and the first limiting block, a movable hole is opened on one side of the limiting groove, a locking rod is movably inserted through the movable hole, a lock head is provided at the end of the locking rod facing the limiting post, a second limiting plate for the locking rod to pass through is installed in the movable hole, and a spring is provided between the lock head and the second limiting plate.

[0009] Compared with the prior art, the present invention has the following advantages: the mold locking device presses the upper mold down through the lifting hydraulic cylinder, and after the mold is closed, the lower mold is pressed up through the balance cylinder, so that the upper mold and the lower mold can be completely closed, thereby avoiding material leakage. Attached Figure Description

[0010] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0011] Figure 2 This is a schematic diagram of the frame structure according to an embodiment of the present utility model.

[0012] Figure 3 This is a schematic diagram of the limiting post according to an embodiment of the present utility model.

[0013] The markings in the diagram are: 1. Frame; 2. Guide column; 3. Upper mold frame; 4. Upper mold; 5. Lower mold; 6. Balance cylinder; 7. Lifting hydraulic cylinder; 8. Upper fixed frame; 9. Lower fixed frame; 10. Middle balance frame; 11. First movable frame; 12. Second movable frame; 13. First connecting rod; 14. Guide rod; 15. Lower heating plate; 16. Limiting column; 17. Through hole; 18. Limiting groove; 19. Circular head; 20. First limiting block; 21. Double-sided cone; 22. Movable hole; 23. Locking rod; 24. Lock head; 25. Second limiting plate; 26. Second limiting block. Detailed Implementation

[0014] To make the above-mentioned features and advantages of this utility model more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings for detailed explanation.

[0015] like Figures 1-3 As shown, a mold locking device includes a frame, a plurality of guide columns 2 are mounted on the frame 1, an upper mold frame 3 is slidably mounted on the guide columns 2, at least one upper mold 4 is mounted on the bottom of the upper mold frame 3, a corresponding lower mold 5 is mounted directly below the upper mold 4, the lower mold 5 is mounted on the top of a balance cylinder 6, the balance cylinder 6 is mounted on the bottom of the frame 1, a lifting hydraulic cylinder 7 for controlling the lifting and lowering of the upper mold frame 3 is mounted on the top of the frame 1, and a balancing mechanism is provided between the frame 1 and the upper mold frame 3.

[0016] It also includes a pair of upper fixed frames 8, a pair of lower fixed frames 9, and a middle balancing frame 10. The top of the upper fixed frame 8 is fixed to the mold closing frame 1. The upper mold frame 3 is slidably mounted on the frame 1. The bottom of the upper fixed frame 8 is hinged to a first movable frame 11. The bottom of the lower fixed frame 9 is fixed to the upper mold frame 3. The top of the lower fixed frame 9 is hinged to a second movable frame 12. The bottom of the first movable frame 11 and the top of the second movable frame 12 are hinged together. The middle balancing frame 10 is mounted on the piston end of the lifting hydraulic cylinder 7. Multiple first connecting rods 13 are hinged between the two ends of the middle balancing frame 10 and the two first movable frames 11, respectively.

[0017] During operation, the lifting hydraulic cylinder 7 controls the lifting of the middle balance frame 10. The middle balance frame 10 drives the upper mold frame 3 to lift through multiple movable frames, thereby driving the upper mold 4 to lift. Through the transition setting of the movable frames, the impact force between the upper mold 4 and the lower mold 5 during mold closing is reduced, avoiding damage between the molds, thereby improving the tightness of mold closing.

[0018] In this embodiment, two guide rods 14 are symmetrically arranged between the frame 1 and the upper mold frame 3. The middle of the guide rod 14 passes through the middle balance frame 10, the bottom of the guide rod 14 is fixed on the upper mold frame 3, and the top of the guide rod 14 passes through the top of the frame 1.

[0019] To facilitate heating during operation, an upper heating plate is provided between the upper mold 4 and the upper mold frame 3, and a lower heating plate 15 is provided between the lower mold 5 and the balance cylinder 6. The operation of the heating plates is existing technology and will not be described in detail here.

[0020] A limiting post 16 is movably installed inside the upper mold 4. A through hole 17 is provided inside the upper mold 4 for the limiting post 16 to move. A first limiting plate 18 for the limiting post 16 to pass through is fixedly installed inside the through hole 17. A limiting groove 18 corresponding to the limiting post 16 is provided on the lower mold 5.

[0021] The lower end of the limiting post 16 has a circular head 19, and a first limiting block 20 is provided in the middle of the limiting post 16. A double-sided cone 21 is movably sleeved between the circular head 19 and the first limiting block 20. A movable hole 22 is provided on one side of the limiting groove 18. A locking rod 23 is movably inserted into the movable hole 22. A locking head 24 is provided at the end of the locking rod 23 facing the limiting post 16. A second limiting plate 25 for the locking rod 23 to pass through is installed in the movable hole 22. A spring is provided between the locking head 24 and the second limiting plate 25.

[0022] The circular head 19 has a groove for one side of the double-sided cone 21 to be inserted. A spring is provided between the double-sided cone 21 and the groove. The spring is used to prevent the double-sided cone 21 from being inserted into the groove under gravity in a natural state.

[0023] During operation, as the upper mold 4 and lower mold 5 approach each other, the lower end of the limiting post 16 extends into the limiting groove 18. The locking rod 23 is pressed and moved by the round head 19, and then subjected to the spring force, causing the locking head 24 to be located between the round head and the double-sided cone 21, thereby locking the upper mold 4 and the lower mold 5. When unlocking, the limiting post 16 is pressed downward from above the through hole, and the limiting post 16 continues to penetrate into the limiting groove 18. The locking rod 23 is pressed and moved by the double-sided cone 21, and then subjected to the spring force, causing the locking head 24 to be located between the double-sided cone 21 and the first limiting block 20. As the upper mold 4 and lower mold 5 separate, the locking head 24 comes close to the double-sided cone 21, pushing the double-sided cone 21 and the round head 19 to fit together. Since the width of the middle part of the double-sided cone 21 is equal to that of the round head 19, the locking rod is pressed and can then leave the limiting post.

[0024] A second limiting block 26 is provided at the rear of the limiting post 16, and the end face of the top rod facing the limiting post is an inclined surface.

[0025] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent changes, and alterations made by those skilled in the art to the above embodiments based on the technical essence of the present utility model without departing from the content of the technical solution of the present utility model shall be within the scope of the present utility model.

Claims

1. A mold clamping apparatus characterized by: It includes a pair of upper fixed frames, a pair of lower fixed frames, and a middle balancing frame. The top of the upper fixed frames is fixed to the frame used for mold closing. An upper mold frame is slidably mounted on the frame. A first movable frame is hinged to the bottom of the upper fixed frames. The bottom of the lower fixed frames is fixed to the upper mold frame. A second movable frame is hinged to the top of the lower fixed frames. The bottom of the first movable frame and the top of the second movable frame are hinged together. The middle balancing frame is mounted on the piston end of the lifting hydraulic cylinder. Multiple first connecting rods are hinged between the two ends of the middle balancing frame and the two first movable frames.

2. The mold locking device of claim 1, wherein: Multiple guide columns are installed on the frame, and an upper mold frame is slidably mounted on the guide columns. At least one upper mold is installed at the bottom of the upper mold frame, and a corresponding lower mold is located directly below the upper mold. The lower mold is mounted on the top of a balance cylinder, which is mounted at the bottom of the frame. A lifting hydraulic cylinder for controlling the raising and lowering of the upper mold frame is installed at the top of the frame, and a balancing mechanism is provided between the frame and the upper mold frame.

3. The mold locking device of claim 2, wherein: Two guide rods are symmetrically arranged between the frame and the upper mold frame, and a center balance frame passes through the middle of the guide rods.

4. The mold locking apparatus of claim 2, wherein: A limiting post is movably installed inside the upper mold. A through hole is provided inside the upper mold for the limiting post to move. A first limiting plate is fixedly installed inside the through hole for the limiting post to pass through. A limiting groove corresponding to the limiting post is provided on the lower mold.

5. The mold locking device of claim 4, wherein: The lower end of the limiting post has a circular head, and a first limiting block is provided in the middle of the limiting post. A double-sided frustum is movably fitted between the circular head and the first limiting block. A movable hole is provided on one side of the limiting groove. A locking rod is movably inserted through the movable hole. A lock head is provided at the end of the locking rod facing the limiting post. A second limiting plate for the locking rod to pass through is installed in the movable hole. A spring is provided between the lock head and the second limiting plate.

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