Automatic water gap breaking structure of injection mold

Abstract

The utility model discloses an automatic water gap breaking structure of an injection mold. The automatic water gap breaking structure comprises a first ejector plate and a second ejector plate which are stacked from bottom to top, a mold seat is further arranged above the second ejector plate, and a rear mold core is further mounted in the mold seat; the top of the rear mold core is also provided with a clamping position for forming a product; the top of the rear mold core is also provided with a water supply pipe assembly which is arranged close to the clamping position, and further comprises a first ejector pin, a second ejector pin and a third ejector pin; the first ejector pin is fixedly installed on the second ejector pin plate, and one end of the first ejector pin movably penetrates through the mold base, then is movably inserted into the rear mold core and makes contact with the bottom of the water supply pipe assembly. According to the utility model, the product can be separated from the water gap while the product is ejected, the design is reasonable, the structure is compact and stable, the use is convenient, the cost is low, and the practicability is strong.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to an automatic water cut-off structure of an injection mold. Background Art

[0002] Plastic injection molds require full automation, de-manualization and cost savings, which are the basic requirements at present. The existing water-cut-off structures, such as latent type, bull-horn type, fine water-point injection, hot runner point / needle valve injection, etc., are restricted by the characteristics of the product materials and appearance. At present, most of the water-cut-off separation is done manually, that is, the water-cut-off is separated from the product manually, which is cumbersome and labor-intensive. Therefore, designing a simple and practical automatic water-cut-off structure is a technical problem that the industry urgently needs to solve. Utility Model Content

[0003] The utility model aims to provide an automatic water-cut-off structure for an injection mold, which can separate the product from the water outlet while realizing product ejection through the cooperation of a pad and a third ejector pin, and has reasonable design, compact structure, convenient use, stable structure, low cost and strong practicality.

[0004] In order to achieve the above purpose, the following technical solutions are adopted:

[0005] An automatic water shut-off structure for an injection mold comprises a first ejector plate and a second ejector plate which are stacked from bottom to top; a mold base is arranged above the second ejector plate, and a rear mold core is installed in the mold base; a clamping position for molding a product is provided on the top of the rear mold core; a water supply pipe assembly arranged near the clamping position is installed on the top of the rear mold core, and further comprises a first ejector pin, a second ejector pin, and a third ejector pin; the first ejector pin is fixedly mounted on the second ejector plate, and one end of the first ejector pin is movably inserted into the rear mold core and contacts the bottom of the water supply pipe assembly after one end of the first ejector pin movably passes through the mold base; a first mounting hole is also provided on the second ejector plate, one end of the second ejector pin is movably mounted in the first mounting hole, and the other end of the second ejector pin is movably inserted into the rear mold core after the other end of the second ejector pin movably passes through the mold base in the rear mold core and in contact with the bottom of the product; a first groove connected to the first mounting hole is provided at the top of the first ejector plate corresponding to the first mounting hole, and a pad is arranged in the first groove, and one end of the second ejector installed in the first mounting hole is arranged on the pad; a first plug hole connected to the first ejector is provided at the bottom of the first ejector plate corresponding to the first groove; one end of the third ejector is movably inserted in the first groove, and the other end of the third ejector movably passes through the first plug hole and extends outward; a first limit platform is also provided at one end of the third ejector movably inserted in the first groove, and the top of the first limit platform contacts the bottom of the pad; the diameter of the first limit platform is larger than the inner diameter of the first plug hole, and a gap is left between the first limit platform and the bottom of the first groove.

[0006] Furthermore, the cross-section of the first mounting hole is T-shaped, and the T-shaped vertical end of the first mounting hole is arranged upward; the end of the second ejector pin movably installed in the first mounting hole is also provided with a second limit platform, and the second limit platform is arranged in the T-shaped horizontal end of the first mounting hole and contacts with the top of the pad.

[0007] Furthermore, it also includes a bottom plate, and two support blocks are arranged at intervals on the top of the bottom plate; the first ejector plate and the second ejector plate are both arranged between the two support blocks, and the mold base is installed on the top of the two support blocks.

[0008] Furthermore, a guide column is installed on the second ejector plate, and one end of the guide column is movably arranged through the mold seat.

[0009] Furthermore, a first connecting hole for connecting with an external injection molding machine top rod is provided at the bottom of the base plate.

[0010] By adopting the above scheme, the beneficial effects of the utility model are:

[0011] The structure can separate the product from the nozzle while realizing product ejection through the cooperation of the pad and the third ejector pin. It has reasonable design, compact structure, convenient use, stable structure, low cost and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 This is a cross-sectional view of one viewing angle of the utility model;

[0014] Figure 3 This is a cross-sectional view of the utility model from another perspective;

[0015] The accompanying drawings illustrate:

[0016] 1. First ejector plate; 2. Second ejector plate; 3. Mold seat; 4. Rear mold core; 5. Water supply pipe assembly; 6. Bottom plate; 7. Support block; 8. Guide column; 9. First connecting hole; 11. First ejector; 12. Second ejector; 13. Third ejector; 14. First groove; 15. Pad; 16. First limit platform; 17. Second limit platform. DETAILED DESCRIPTION

[0017] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] Reference Figures 1 to 3As shown, the utility model provides an automatic water shut-off structure for an injection mold, comprising a first ejector plate 1 and a second ejector plate 2 which are stacked from bottom to top; a mold base 3 is also arranged above the second ejector plate 2, and a rear mold core 4 is also installed in the mold base 3; a clamping position for molding a product is also provided on the top of the rear mold core 4; a water supply pipe assembly 5 arranged close to the clamping position is also installed on the top of the rear mold core 4. In one embodiment, the structure further comprises a first ejector pin 11, a second ejector pin 12, and a third ejector pin 13; the first ejector pin 11 is fixedly mounted on the second ejector plate 2, and after one end of the first ejector pin 11 movably passes through the mold base 3, it is movably inserted into the rear mold core 4 and contacts with the bottom of the water supply pipe assembly 5; a first mounting hole is also provided on the second ejector plate 2, and one end of the second ejector pin 12 is movably mounted in the first mounting hole, and after the other end of the second ejector pin 12 movably passes through the mold base 3, It is movably inserted in the rear mold core 4 and contacts with the bottom of the product; a first groove 14 connected to the first mounting hole is provided at the top of the first ejector plate 1, and a pad 15 is arranged in the first groove 14, and one end of the second ejector 12 installed in the first mounting hole is arranged on the pad 15; a first plug hole connected to the first ejector plate 1 is provided at the bottom of the first ejector plate 1 corresponding to the first groove 14; one end of the third ejector 13 is movably inserted in the first groove 14, and the other end of the third ejector 13 movably passes through the first plug hole and extends outward; a first limit platform 16 is also provided at one end of the third ejector 13 movably inserted in the first groove 14, and the top of the first limit platform 16 contacts with the bottom of the pad 15; the diameter of the first limit platform 16 is larger than the inner diameter of the first plug hole, and a gap is left between the first limit platform 16 and the bottom of the first groove 14.

[0019] Continue to refer to Figures 1 to 3As shown, in this embodiment, the positions on the rear mold core 4 are provided with two rows, and the water supply pipe assembly 5 is arranged between the two rows of positions; accordingly, a plurality of first ejector pins 11 are provided, which are evenly distributed below the water supply pipe assembly 5. When the water supply pipe assembly 5 is lifted up, the force can be ensured to be uniform. At the same time, two rows of second ejector pins 12 are also provided, and a second ejector pin 12 is arranged below each position, which can independently lift the products on the corresponding positions, realize the synchronous ejection of multiple products, and improve work efficiency; a plurality of second ejector pins 12 are arranged on the pad 15, and two third ejector pins 13 are arranged below each pad 15, that is, the pad 15 is lifted up by the two third ejector pins 13, so that all the second ejector pins 12 can be driven to lift upward. By providing the pad 15, the number of the third ejector pins 13 can be greatly reduced, and the structure can be optimized. Reduce costs; when working, first the first ejector plate 1 and the second ejector plate 2 move upward at the same time. Since there is a gap between the first limit platform 16 of the third ejector 13 and the bottom of the first groove 14, when the first ejector plate 1 and the second ejector plate 2 rise, only the first ejector 11 will be driven to move upward, thereby lifting the water supply pipe assembly 5 upward, while the position of the second ejector 12 will remain unchanged until the bottom of the first groove 14 contacts the first limit platform 16. This is the first stage of movement; then, the first ejector plate 1 and the second ejector plate 2 continue to move upward. Since the bottom of the first groove 14 contacts the first limit platform 16 at this time, the third ejector 13 will be driven to move upward, and then the second ejector 12 will be driven to move upward synchronously through the pad 15 to lift the product and complete demoulding.

[0020] In one embodiment, the cross section of the first mounting hole is T-shaped, and the T-shaped vertical end of the first mounting hole is arranged upward; the second ejector 12 is movably mounted in the first mounting hole and is also provided with a second limit platform 17, which is arranged in the T-shaped horizontal end of the first mounting hole and contacts the top of the pad 15. At the same time, it also includes a bottom plate 6, and two support blocks 7 are arranged at intervals on the top of the bottom plate 6; the first ejector plate 1 and the second ejector plate 2 are arranged between the two support blocks 7, and the mold seat 3 is installed on the top of the two support blocks 7; the second ejector plate 2 is also installed with a guide column 8, and one end of the guide column 8 is movably arranged through the mold seat 3. Through the guide column 8, the first ejector plate 1 and the second ejector plate 2 can be guided when they are moving upward. In addition, the bottom of the bottom plate 6 is also provided with a first connection hole 9 for connecting with the ejector rod of the injection molding machine in the outside world. The first ejector plate 1 and the second ejector plate 2 are driven to move up and down by the ejector rod of the injection molding machine.

[0021] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic water shut-off structure for an injection mold, comprising a first ejector plate and a second ejector plate stacked from bottom to top; a mold base is arranged above the second ejector plate, and a rear mold core is installed in the mold base; a clamping position for molding a product is provided on the top of the rear mold core; a water supply pipe assembly arranged near the clamping position is installed on the top of the rear mold core, characterized in that: The invention also includes a first ejector pin, a second ejector pin, and a third ejector pin; the first ejector pin is fixedly mounted on the second ejector pin plate, and one end of the first ejector pin is movably inserted into the rear mold core and contacts the bottom of the water supply pipe assembly after one end of the first ejector pin movably passes through the mold seat; the second ejector pin plate is also provided with a first mounting hole, one end of the second ejector pin is movably mounted in the first mounting hole, and the other end of the second ejector pin is movably inserted into the rear mold core and contacts the bottom of the product after the other end of the second ejector pin movably passes through the mold seat; a first groove connected to the first mounting hole is also provided at the top of the first ejector pin plate, and a gasket is arranged in the first groove The first ejector plate is a plate, one end of the second ejector pin installed in the first mounting hole is arranged on the pad; a first plug hole connected to the first groove is provided at the bottom of the first ejector pin plate corresponding to the first groove; one end of the third ejector pin is movably inserted in the first groove, and the other end of the third ejector pin is movably passed through the first plug hole and extended outward; a first limit platform is also provided at one end of the third ejector pin movably inserted in the first groove, and the top of the first limit platform contacts the bottom of the pad; the diameter of the first limit platform is larger than the inner diameter of the first plug hole, and a gap is left between the first limit platform and the bottom of the first groove.

2. The automatic water shut-off structure of the injection mold according to claim 1, characterized in that: The cross-section of the first mounting hole is T-shaped, and the T-shaped vertical end of the first mounting hole is arranged upward; the end of the second ejector pin movably installed in the first mounting hole is also provided with a second limit platform, and the second limit platform is arranged in the T-shaped horizontal end of the first mounting hole and contacts with the top of the pad.

3. The automatic water shut-off structure of the injection mold according to claim 1, characterized in that: It also includes a bottom plate, and two support blocks are arranged at intervals on the top of the bottom plate; the first ejector plate and the second ejector plate are both arranged between the two support blocks, and the mold seat is installed on the top of the two support blocks.

4. The automatic water shut-off structure of the injection mold according to claim 3, characterized in that: A guide column is also installed on the second ejector plate, and one end of the guide column is movably arranged through the mold seat.

5. The automatic water shut-off structure of the injection mold according to claim 4, characterized in that: The bottom of the bottom plate is also provided with a first connecting hole for connecting with an external injection molding machine top rod.

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