Limiting and retaining device of sliding core

Abstract

The utility model discloses a limiting and retaining device of a sliding core, which comprises an upper die and a lower die, a cavity is arranged between the upper die and the lower die, a fixed core is arranged in the cavity, sliding channels are arranged on two sides of the cavity, the outer ends of the sliding channels are fixedly connected with driving oil cylinders, and sliding seats are slidably connected in the sliding channels. The two sides of the sliding channel are fixedly connected with sliding base pressing plates. One end of the sliding seat is fixedly connected with a sliding mold core, a driving groove is formed in the other side of the sliding seat, a driving block is slidably connected in the driving groove, the piston end of the driving oil cylinder is fixedly connected with the driving block, sliding transverse pins are arranged on the two sides of the driving groove, and the sliding transverse pins are slidably connected in the sliding seat; a limiting groove matched with the sliding transverse pin is formed in the sliding seat pressing plate; the retaining device is simple in structure, can limit the movement of the sliding mold core during mold closing, ensures the molding precision of a product, does not generate burrs, does not influence the sliding mold core to retreat from the mold cavity during mold opening, and is convenient for demolding of the product.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a limiting and anti-retreat device for a sliding core Background Art

[0002] Molds are various dies and tools used in industrial production to obtain the required products by means of injection molding, blow molding, extrusion, die casting, forging, smelting, stamping, etc. There is a core-pulling mold in the molds. A movable core is arranged in the mold. By separating and combining the mold components, the cavity inside the mold can be made more precise, the forming accuracy of the product can be improved, and it is also beneficial to the demolding of the product. However, the pressure generated during filling will push the sliding core backward, resulting in burrs. After the burrs are generated, the core will be filled with glue. At this time, if the core is inserted again, the core will break and the mold will be damaged. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a limiting and anti-retreat device for a sliding core. The anti-retreat device has a simple structure. When the mold is closed, it can limit the movement of the sliding core, ensure the forming accuracy of the product, and no burrs will be generated. When the mold is opened, it will not affect the sliding core to withdraw from the cavity, which is convenient for product demolding.

[0004] To achieve the above purpose, the utility model adopts the following technical scheme: A limiting and anti-retreat device for a sliding core, including an upper mold and a lower mold. A cavity is opened between the upper mold and the lower mold. A fixed core is arranged in the cavity. Sliding channels are arranged on both sides of the cavity. The outer ends of the sliding channels are fixedly connected with driving oil cylinders. A sliding seat is slidably connected in the sliding channels. Sliding seat pressing plates are fixedly connected to both sides of the sliding channels. One end of the sliding seat close to the fixed core is fixedly connected with a sliding core. A driving groove is opened on the side of the sliding seat away from the fixed core. A driving block is slidably connected in the driving groove. The piston end of the driving oil cylinder is fixedly connected with the driving block. Sliding cross pins are arranged on both sides of the driving groove. The sliding cross pins are slidably connected in the sliding seat. Limiting grooves matching the sliding cross pins are opened on the sliding seat pressing plates.

[0005] Optionally, both the driving groove and the driving block are of T-shaped structures, and both sides of the driving block are in contact with the side walls of the driving groove.

[0006] Optionally, trapezoidal guiding blocks are arranged at both ends of the sliding cross pins.

[0007] Optionally, an inclined surface matching the guiding block is arranged at the front end of the driving block, and the limiting groove is arranged as a V-shaped structure matching the guiding block.

[0008] The limiting and anti-retreat device for the sliding core of the utility model has the following advantages:

[0009] After the upper mold and the lower mold are engaged, the driving oil cylinder pushes the driving block to slide inward. When the driving block contacts the sliding cross pin in the sliding seat, it will extrude the sliding cross pin outward. When the sliding cross pin cannot cooperate with the limiting groove, the sliding cross pin will block the driving block. As the driving oil cylinder continues to extend, the driving block will drive the sliding seat to continue sliding inward. When the sliding cross pin moves to the position of the limiting groove, the sliding cross pin will insert into the limiting groove, and the sliding cross pin will no longer block the driving block. The driving block continues to slide inward for a certain distance and abuts against the inner wall of the driving groove. At this time, the sliding cross pin is blocked by the side wall of the driving block and cannot withdraw from the limiting groove, and the sliding seat is locked. The cavity structure is stable, which can ensure the forming accuracy of the product and will not produce burrs. Brief Description of the Drawings

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

[0011] Figure 2 is a schematic diagram of the cooperation between the sliding channel and the sliding seat.

[0012] Figure 3 is a schematic diagram of the driving block and the sliding cross pin during mold opening.

[0013] Figure 4 is a schematic diagram of the driving block and the sliding cross pin during mold closing. Detailed Description of the Preferred Embodiment

[0014] The present utility model will be further described below with reference to the accompanying drawings.

[0015] As Figures 1-4 shown, a limiting and anti-retreat device for a sliding core includes an upper mold and a lower mold 1. A cavity 2 is formed between the upper mold and the lower mold 1. A fixed core 3 is arranged in the cavity 2. Sliding channels 4 are arranged on both sides of the cavity 2. A driving oil cylinder 5 is fixedly connected to the outer ends of the sliding channels 4. A sliding seat 6 is slidably connected in the sliding channels 4. Sliding seat pressing plates 7 are fixedly connected to both sides of the sliding channels 4. One end of the sliding seat 6 close to the fixed core 3 is fixedly connected to a sliding core 8. A driving groove 9 is formed on the side of the sliding seat 6 away from the fixed core 3. A driving block 10 is slidably connected in the driving groove 9. The piston end of the driving oil cylinder 5 is fixedly connected to the driving block 10. Both the driving groove 9 and the driving block 10 are of T-shaped structures, and both sides of the driving block 10 are in contact with the side walls of the driving groove 9. Sliding cross pins 11 are arranged on both sides of the driving groove 9. The sliding cross pins 11 are slidably connected in the sliding seat 6. Limiting grooves 12 matching the sliding cross pins 11 are formed on the sliding seat pressing plates 7. Trapezoidal guiding blocks are arranged at both ends of the sliding cross pins 11. The hypotenuse of the guiding blocks is inclined at 45°. An inclined surface matching the guiding blocks is arranged at the front end of the driving block 10, and the inclined surface is also inclined at 45°. The limiting grooves 12 are arranged in a V-shaped structure, and the opening angle of the limiting grooves 12 is 90°.

[0016] During mold closing, first, the upper mold is engaged with the lower mold 1, and then the driving oil cylinder 5 is driven to push the driving block 10 to slide inward. When the driving block 10 contacts the sliding cross pin 11 in the sliding seat 6, the sliding cross pin 11 will be extruded outward. When the sliding cross pin 11 cannot cooperate with the limiting groove 12, the sliding cross pin 11 will block the driving block 10, and the driving block 10 will drive the entire sliding seat 6 to slide inward. When the sliding core 8 moves to cooperate with the fixed core 3, the sliding cross pin 11 also moves to the position of the limiting groove 12. At this time, when the driving block 10 continues to slide inward, the sliding cross pin 11 will be pushed into the limiting groove 12. The sliding cross pin 11 no longer blocks the driving block 10, and the driving block 10 continues to slide inward for a certain distance and abuts against the inner side wall of the driving groove 9. At this time, a complete cavity 2 is formed in the mold, and the sliding cross pin 11 is jammed by the side wall of the driving block 10, so that the sliding cross pin 11 cannot withdraw from the limiting groove 12, thereby realizing the locking of the sliding seat 6. Then, the raw material is filled into the cavity 2, and the pressure will not cause the sliding core 8 to retreat, which can ensure the forming accuracy of the product and will not produce burrs.

[0017] During mold opening, the driving oil cylinder 5 drives the driving block 10 outward. After traveling a dead stroke, it fits against the outer side wall of the driving groove 9. At this time, the sliding cross pin 11 is released and is no longer restricted by the driving block 10. The driving block 10 drives the sliding seat 6 to continue sliding outward. Under the action of the limiting groove 12, the sliding cross pin 11 will slide inward into the sliding seat 6, releasing the restriction on the sliding seat 6. When the sliding seat 6 drives the sliding core 8 to completely withdraw from the cavity 2, the mold opens, and the product is ejected and demolded.

[0018] The embodiments described above are only partial embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Claims

1. A limiting and anti-retreat device for a sliding core, comprising an upper mold and a lower mold. A cavity is formed between the upper mold and the lower mold, and a fixed core is arranged in the cavity. It is characterized in that: Sliding channels are arranged on both sides of the cavity. The outer ends of the sliding channels are fixedly connected with driving oil cylinders. A sliding seat is slidably connected in the sliding channels, and sliding seat pressing plates are fixedly connected to both sides of the sliding channels; One end of the sliding seat close to the fixed core is fixedly connected with a sliding core. A driving groove is formed on the side of the sliding seat away from the fixed core. A driving block is slidably connected in the driving groove. The piston end of the driving oil cylinder is fixedly connected with the driving block. Sliding cross pins are arranged on both sides of the driving groove. The sliding cross pins are slidably connected in the sliding seat. Limiting grooves matching the sliding cross pins are formed on the sliding seat pressing plates.

2. The limiting and anti-retreat device for the sliding core as described in claim 1, characterized in that: Both the driving groove and the driving block are of T-shaped structures, and the two sides of the driving block are attached to the side walls of the driving groove.

3. The limit and anti-retreat device for the sliding core as described in claim 1, characterized in that: Trapezoidal guiding blocks are arranged at both ends of the sliding cross pin.

4. The limiting and anti-retreat device for the sliding core as described in claim 3, characterized in that: An inclined surface matching the guiding block is arranged at the front end of the driving block, and the limiting groove is arranged as a V-shaped structure matching the guiding block.

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