Structure for quickly replacing insert of injection mold

Abstract

The utility model relates to a structure for quickly replacing an insert of an injection mold, which comprises a movable mold core, a replaceable interchangeable insert, an ejector pin, a return pin, a guide sleeve, a movable mold frame, a mold foot, a bottom plate, a reset spring, an ejector pin plate, an ejector pin bottom plate, a limiting block, a T-shaped pin and a push plate guide column, the replaceable interchangeable insert is arranged in the movable mold core, and the bottom of the replaceable interchangeable insert is movably connected with the head of the T-shaped pin; the T-shaped needle is fixed on the ejector plate and is used for realizing synchronous movement of the replaceable interchange insert and the ejector plate, and the replaceable interchange insert can be quickly separated from the T-shaped needle, so that quick replacement is completed. The utility model has obvious technical effects in the aspects of improving the mold replacement efficiency, expanding the mold application range, reducing the operation and maintenance cost and the like, and is suitable for an efficient injection molding manufacturing system under the scene of multi-variety, small-batch or frequent mold replacement.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold structure design field, concretely relates to a structure of quick change of injection mold insert. BACKGROUND

[0002] In the use process of injection mold, often need to produce different specifications or different characteristics of plastic product through changing insert, thereby reduce mold manufacturing cost and shorten processing cycle. However, the conventional insert replacement mode usually needs to disassemble the mold structure from the injection molding machine to change the insert, leading to cumbersome operation, time-consuming and laborious, seriously affect the production efficiency. Therefore, the prior art usually adopts the mode of locking screw from the front to fix the insert, so that the replacement process is relatively simplified. However, this method is only suitable for the insert fixing around the product, and for the insert located in the product, the insert cannot be fixed by locking screw from the front, which limits the application range. Therefore, it is urgent to provide a structure for quickly changing the insert without disassembling the mold, so as to improve the mold adaptability and improve the production efficiency. SUMMARY

[0003] To solve the above problems, the utility model provides a kind of injection mold structure that can directly complete insert replacement on injection molding machine, and the structure is cooperated with the T-shaped slot of interchangeable insert by T-shaped needle, so that interchangeable insert moves synchronously with ejector pin during mold ejection, and remains fixed under the action of limiting block, to realize quick replacement.

[0004] To achieve the above purpose, the technical scheme of the utility model is as follows: a kind of injection mold structure for quickly changing insert, including movable die kernel, interchangeable insert, ejector pin, needle, guide sleeve, movable die frame, mold foot, bottom plate, reset spring, ejector pin plate, ejector pin bottom plate, limiting block, T-shaped needle and push plate guide column, the movable die kernel is fixedly installed in movable die frame, the movable die frame is connected with mold foot by guide sleeve, and mold foot is arranged at the top of bottom plate, forming the overall fixed structure of movable die;The ejector pin plate and the ejector pin bottom plate are fixed to each other, located between movable die frame and bottom plate, and can move in up-down direction under the guidance of push plate guide column;The needle is fixed on the ejector pin plate and passes through the movable die frame, the reset spring is sleeved on the outer side of needle, one end is supported on movable die frame, and the other end is supported on ejector pin plate, so as to provide reset force for ejector pin plate;The limiting block is fixed on the upper part of movable die frame, for limiting the ejection stroke of ejector pin plate;The interchangeable insert is arranged in movable die kernel, and the bottom thereof is movably connected with the head of T-shaped needle, the T-shaped needle is fixed on the ejector pin plate, for realizing the synchronous movement of interchangeable insert and ejector pin plate.

[0005] The utility model discloses technical effects are: the utility model discloses through setting up T type needle and T type groove cooperation, make replaceable interchangeable insert can directly on injection molding machine change operation, need not to disassemble mould, the efficiency of insert replacement has been improved significantly, reduced production downtime. Replaceable interchangeable insert is connected through T type needle and ejector plate, when ejector plate ejection, with the synchronous movement of ejector plate, realizes the synchronous demolding of insert and product, simplifies demolding process. T type structure has good guiding effect, can ensure that insert moves stably, position is accurate in ejection process, avoids the occurrence of deviation or jamming phenomenon.

[0006] The whole structure is compact and reasonable, the parts are closely matched, has the characteristics of high modularization and standardization, is favorable for subsequent maintenance and replacement operation. In the operation process, the insert can be assembled and disassembled without using special tools, the operation process is simplified, the manual operation difficulty and training cost are reduced, and the utility model is suitable for the production line with high automation. In addition, by replacing the use of standardized inserts, the overall life of the mold can be prolonged, the precision of the mold cavity and the consistency of the product quality can be maintained, and the stability and economy of the injection molding process can be further improved.

[0007] In conclusion, the utility model has remarkable technical effects in improving the mold replacement efficiency, expanding the mold application range, reducing the operation and maintenance cost, and is suitable for efficient injection molding manufacturing systems in the scene of multi-variety, small batch or frequent mold replacement. ACCURACY

[0008] Figure 1 It is the overall structure of the utility model stereogram schematic diagram;

[0009] Figure 2 It is the overall structure of the utility model exploded view schematic diagram;

[0010] Figure 3 It is the utility model plan view;

[0011] Figure 4 It is the utility model Figure 3 Along the section of A-A;

[0012] Figure 5 It is the utility model fixed interchangeable insert schematic diagram;

[0013] Figure 6 It is the utility model T type needle schematic diagram;

[0014] Figure 7 It is the utility model movable die kernel schematic diagram;

[0015] Figure 8 It is the utility model movable die frame schematic diagram.

[0016] In the diagram: 1. Moving mold core; 1-1. First insert hole; 1-2. Second insert hole; 2. Fixed interchangeable insert; 3. Replaceable interchangeable insert; 3-1. T-slot; 4. Ejector pin; 5. Return pin; 6. Guide sleeve; 7. Moving mold frame; 8. Mold foot; 9. Base plate; 10. Return spring; 11. Ejector plate; 12. Ejector base plate; 13. Limit block; 14. T-pin; 15. Push plate guide post. Detailed Implementation

[0017] like Figures 1 to 8 As shown, a quick-change insert structure for an injection mold includes a moving mold core 1, a fixed interchangeable insert 2, a replaceable interchangeable insert 3, an ejector pin 4, a return pin 5, a guide sleeve 6, a moving mold frame 7, mold feet 8, a base plate 9, a return spring 10, an ejector plate 11, an ejector base plate 12, a limiting block 13, a T-shaped pin 14, and a push plate guide post 15. The moving mold core 1 is fixedly installed inside the moving mold frame 7. The lower end of the moving mold frame 7 is fixedly connected to the mold feet 8 and the base plate 9, forming an integral fixed structure for the moving mold. The ejector plate 11 and the ejector base plate 12 are fixed to each other and located between the moving mold frame 7 and the base plate 9, and can move vertically under the guidance of the push plate guide post 15. The return pin 5 is fixed on the ejector plate 11 and passes through the moving mold frame 7. The return spring 10 is sleeved on the outside of the return pin 5, with one end supported on the moving mold frame 7 and the other end supported on the ejector plate 11, thereby providing a restoring force to the ejector plate 11. The limiting block 13 is fixed to the bottom of the moving mold frame 7 to limit the ejection stroke of the ejector plate 11. The fixed interchangeable insert 2 is fixed to the insert mounting position of the moving mold core 1 by screws, while the interchangeable insert 3 is set inside the moving mold core 1. Its bottom is provided with a T-slot 3-1, which cooperates with the head of the T-pin 14. The head of the T-pin 14 is provided with an annular groove 14-1 and is fixed on the ejector plate 11 to realize the synchronous movement of the interchangeable insert 3 and the ejector plate 11.

[0018] The moving mold core 1 is provided with a first insert hole 1-1 and a second insert hole 1-2, which are used to install replaceable insert 3 and fixed insert 2, respectively.

[0019] The moving mold frame 7 has a shaft hole 7-1 for engaging with the top of the T-shaped pin 14, and its position corresponds to the first insert hole 1-1.

[0020] The replaceable interchangeable insert 3 is used to replace the partial forming structure or the lettering mark of the product. The shape of the replaceable interchangeable insert 3 is a cuboid, and the outer surface of the replaceable interchangeable insert 3 is matched with the movable mold core 1. The T-shaped groove 3-1 at the bottom of the replaceable interchangeable insert 3 penetrates along the width direction of the replaceable interchangeable insert 3, and the opening width of the T-shaped groove 3-1 is slightly larger than the width of the head annular groove 14-1 of the T-shaped pin 14, so as to ensure that the T-shaped pin 14 can be smoothly inserted and slid. The head of the T-shaped pin 14 is in a T shape, which is matched with the T-shaped groove 3-1, so as to provide a stable connection and guiding function. The lower end of the T-shaped pin 14 is fixed on the ejector plate 11, so that the T-shaped pin 14 can move synchronously with the ejector plate 11. The limiting block 13 is a cuboid structure, which is installed on the movable mold frame 7. A predetermined gap S is formed between the bottom surface of the limiting block 13 and the ejector plate 11, and the gap S is smaller than the length of the insert hole 1-1, so as to limit the movement range of the replaceable interchangeable insert 3 and ensure that the replaceable interchangeable insert 3 cannot completely separate from the insert hole 1-1 during the ejection process. The distance S2 between the movable mold frame 7 and the ejector plate 11 is greater than the length of the insert hole 1-1, so that the replaceable interchangeable insert 3 can be completely ejected from the movable mold core 1 when the replaceable interchangeable insert 3 is replaced.

[0021] During the working process of the mold, the molten plastic fills the cavity through the injection system. After the product is cooled, the ejector plate 11 moves upward under the action of the injection molding machine push-out mechanism, and drives the ejector pin 4, the T-shaped pin 14 and the replaceable interchangeable insert 3 to move upward synchronously. When the ejector plate 11 moves to the upper limit position set by the limiting block 13, the movement of the ejector plate 11 is stopped. Since the gap S between the limiting block 13 and the top surface of the ejector plate 11 is smaller than the length of the insert hole 1-1, the replaceable interchangeable insert 3 cannot completely separate from the movable mold core 1, but only moves a small distance upward in the insert hole 1-1. At this time, the product is demolded, and the mold completes a forming cycle.

[0022] When it is necessary to replace the replaceable interchangeable insert 3, the limiting block 13 is first removed, and then the ejector plate 11 is continuously pushed to move upward until the ejector plate 11 reaches the bottom position of the movable mold frame 7. Since the distance S2 between the movable mold frame 7 and the ejector plate 11 is greater than the length of the insert hole 1-1, the replaceable interchangeable insert 3 can completely separate from the insert hole 1-1 at this time, so that the replaceable interchangeable insert 3 can be slid and disassembled along the direction of the T-shaped pin 14. After the new replaceable interchangeable insert is slid into the direction of the T-shaped pin 14, the ejector plate 11 is returned downward to drive the new replaceable interchangeable insert to be reinserted into the insert hole 1-1, and finally the limiting block 13 is reinstalled, so that the interchangeable operation is completed. Through the operation process, the insert can be replaced without stopping the machine and without disassembling the mold, which greatly improves the adaptability and working efficiency of the mold in the production of multi-specification products.

Claims

1. A structure for quick change of insert in injection mold characterized by: The utility model relates to a movable die structure, including movable die kernel (1), replaceable interchangeable insert (3), ejector pin (4), needle (5), guide sleeve (6), movable die frame (7), die foot (8), bottom plate (9), reset spring (10), ejector pin plate (11), ejector pin bottom plate (12), limiting block (13), T type needle (14) and push plate guide pillar (15), movable die kernel (1) fixed mounting is in movable die frame (7), movable die frame (7) is connected with die foot (8) through guide sleeve (6), die foot (8) is set up at the top end of bottom plate (9), forms the integral fixed structure of movable die, the ejector pin plate (11) is fixed with the ejector pin bottom plate (12) each other, is located between movable die frame (7) and bottom plate (9), can under the guidance of push plate guide pillar (15) along the up and down direction movement, needle (5) is fixed on the ejector pin plate (11) and passes through movable die frame (7), reset spring (10) is set on the outside of needle (5), one end is supported on movable die frame (7), the other end is supported on the ejector pin plate (11), to provide reset force for the ejector pin plate (11), limiting block (13) is fixed in the upper portion of movable die frame (7) and is used to limit the ejection stroke of ejector pin plate (11), replaceable interchangeable insert (3) is set up in movable die kernel (1) inside, and its bottom is movably connected with the head of T type needle (14), T type needle (14) is fixed on the ejector pin plate (11) and is used to realize the synchronous movement of replaceable interchangeable insert (3) and ejector pin plate (11).

2. The structure for quick change of insert of injection mold according to claim 1, wherein: First insert hole (1-1) and second insert hole (1-2) are formed in the movable die kernel (1) for mounting replaceable interchangeable insert (3) and fixed interchangeable insert (2) respectively.

3. The structure for quick change of insert of injection mold according to claim 1, wherein: Replaceable interchangeable insert (3) is a cuboid, and its outer surface matches with the movable die kernel (1); T-shaped groove (3-1) is arranged at the bottom of replaceable interchangeable insert (3), and the T-shaped groove (3-1) penetrates along the width direction of the insert; the opening width of the T-shaped groove (3-1) is slightly larger than the head width of T type needle (14) to ensure that the T type needle (14) can be smoothly inserted and slid.

4. The structure for quick change of insert of injection mold according to claim 2, wherein: The head of T type needle (14) is T-shaped, and the cross-sectional width matches with the T-shaped groove (3-1) to provide stable connection and guiding function; the lower end of T type needle (14) is fixed on the ejector pin plate (11) to move synchronously with the ejector pin plate (11).

5. The structure for quick change of insert of injection mold according to claim 1, wherein: Limiting block (13) is a cuboid structure, which is installed on the movable die frame (7), and a predetermined gap S is formed between the bottom surface of the limiting block (13) and the ejector pin plate (11); the gap S is smaller than the length of insert hole (1-1); the gap S2 between the movable die frame (7) and the ejector pin plate (11) is larger than the length of insert hole (1-1).

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