Quick-change structure of extrusion pin
By introducing a quick replacement structure of extrusion pins into the die-casting mold, the cylinder drive connecting rod is used to push the extrusion pins, combined with the step design and limit structure, the problem of inconvenience in replacement of extrusion pins is solved, rapid disassembly and assembly are achieved, and damage is reduced, and production efficiency is improved.
Patent Information
- Application Number
- CN202422126063.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-08-30
AI Technical Summary
The extrusion pins in existing die-casting molds are inconvenient to replace and are easily damaged, resulting in cumbersome and time-consuming operation, affecting production efficiency.
The quick change structure including extrusion pin, extrusion pin sleeve, connecting rod, connecting sleeve and oil cylinder is adopted. The extrusion pin is driven by the oil cylinder to push the extrusion pin, combining the step design and limit structure to achieve convenient disassembly and assembly.
It realizes rapid disassembly and assembly of extruded pins, reduces damage, improves work efficiency, avoids mold removal operations, and improves guidance and support effects.
Smart Images
Figure CN223185516U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of die-casting dies, in particular to an extrusion pin quick-change structure. Background Art
[0002] Die castings produced by die casting molds inevitably involve air due to the high-speed, high-pressure process of filling the molten metal. Furthermore, die castings are produced at high temperatures, and shrinkage holes are unavoidable in areas with thick walls.
[0003] In order to increase the density of castings and minimize the size of pores and shrinkage cavities, a type of die casting called "extrusion die casting" is used. Extrusion die casting is to set "extrusion pins" in places where pores are dense and where shrinkage cavities are likely to occur. During die casting, when the boost is started, the "extrusion pins" are activated to squeeze the casting to minimize the compression of pores and shrinkage cavities. In the actual casting process, the extrusion pins will be deformed by extrusion or corroded or worn after long-term use. In this case, the extrusion pins and pin sleeves need to be replaced. Currently, the extrusion pins on the die casting mold are inconvenient to replace, mainly because the extrusion pins are directly fixed on the push plate or mold frame, and the pin sleeves are embedded in the mold core or mold frame. When replacing, the mold needs to be removed, which is a cumbersome and time-consuming operation. In addition, the extrusion pins of the existing structure are prone to breakage. Summary of the Invention
[0004] In view of the above-mentioned deficiencies in the prior art, the present invention provides an extrusion pin quick-change structure, which has a simple structure, is easy to assemble and disassemble, improves the efficiency of replacing parts, and reduces the damage of the extrusion pin.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A quick-change structure for an extrusion pin, characterized in that it includes an extrusion pin, an extrusion pin sleeve, a connecting rod, a connecting sleeve, and an oil cylinder, one end of the connecting rod is connected to the front end of the piston rod of the oil cylinder, the rear end of the extrusion pin is connected to the other end of the connecting rod, the extrusion pin sleeve is sleeved on the extrusion pin and axially slides with the extrusion pin, the connecting sleeve is sleeved on the outside of the connecting rod, and a movable cavity is provided in the connecting sleeve for axial movement of the connecting rod, one end of the connecting sleeve abuts against the cylinder body of the oil cylinder, and the other end abuts against the rear end of the extrusion pin sleeve.
[0007] Furthermore, the outer side surface of the extruded pin sleeve is in the shape of a three-step shaft from small to large, and the inner hole of the extruded pin sleeve is in the shape of a two-step hole from small to large.
[0008] Furthermore, the connecting rod has a T-shaped groove, the disc head at the rear end of the extrusion pin is limited in the T-shaped groove, and a pressure plate is provided on the side of the connecting rod and is screwed to the connecting rod to cover the T-shaped groove.
[0009] Furthermore, a touch block is provided on one side of the rear portion of the connecting rod, and a touch limit block is provided on one side of the oil cylinder. The upper front end of the touch limit block has a rectangular limit ring, and the upper end of the touch block extends into the rectangular limit ring. A travel switch is provided at the rear end of the touch limit block, and the travel switch corresponds to the touch block.
[0010] The beneficial effects of the utility model include: saving mold repair time, faster and more convenient disassembly and assembly, improving work efficiency, avoiding mold disassembly, and better guiding and supporting effects for the extrusion pin to avoid breakage. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a schematic diagram of the explosion structure of the utility model;
[0012] Figure 2 It is a cross-sectional view of the present utility model. DETAILED DESCRIPTION
[0013] The present invention will be described in further detail below with reference to specific embodiments and accompanying drawings.
[0014] A kind of Figure 1-2 The extrusion pin quick-change structure shown includes an extrusion pin 1, an extrusion pin sleeve 2, a connecting rod 3, a connecting sleeve 4, and an oil cylinder 5. One end of the connecting rod 3 is connected to the front end of the piston rod of the oil cylinder 5, and the rear end of the extrusion pin 1 is connected to the other end of the connecting rod 3. The connecting rod 3 is driven by the oil cylinder 5 to push the extrusion pin. The extrusion pin sleeve 2 is sleeved on the extrusion pin 1 and axially slides with the extrusion pin to position and guide the extrusion pin. The connecting sleeve 4 is sleeved on the outside of the connecting rod 3. The connecting sleeve 4 has a movable cavity for axial movement of the connecting rod 3. One end of the connecting sleeve 4 abuts against the cylinder body of the oil cylinder 5, and the other end abuts against the rear end of the extrusion pin sleeve 2. This structure facilitates the disassembly and assembly of the extrusion pin sleeve 2.
[0015] The outer surface of the extrusion pin sleeve 2 has a three-step shaft shape, from small to large. The first step at the front end mates with the mold core, the second step in the middle mates with the mold frame, and the end face of the third step is positioned at the rear end of the mold frame. The third step then presses against the rear end of the extrusion pin sleeve 2 via the connecting sleeve 4. The inner hole of the extrusion pin sleeve 2 has a two-step hole shape, from small to large. The first step precisely mates with the extrusion pin 1, while the second step serves as a clearance.
[0016] To facilitate the disassembly and assembly of the extrusion pin 1, a T-shaped groove is provided on the connecting rod 3 of this embodiment, and the disc head at the rear end of the extrusion pin 1 is limited in the T-shaped groove, and a pressure plate 6 is provided on the side of the connecting rod 3 and is locked to the connecting rod 3 by screws to cover the T-shaped groove.
[0017] A touch block 7 is provided on one side of the rear portion of the connecting rod 3, and a touch limit block 8 is provided on one side of the oil cylinder 5. The upper front end of the touch limit block 8 has a rectangular limit ring 9, and the upper end of the touch block 7 extends into the rectangular limit ring 9. A limit switch 10 is provided on the rear end of the touch limit block 8, and the limit switch 10 corresponds to the touch block 7. The touch block 7 triggers the limit switch 10 to provide feedback on the piston rod position of the oil cylinder 5.
[0018] The above is a detailed introduction to the technical solutions provided by the embodiments of the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.
Claims
1. A quick-change structure for an extrusion pin, characterized in that: The invention comprises an extrusion pin (1), an extrusion pin sleeve (2), a connecting rod (3), a connecting sleeve (4), and an oil cylinder (5). One end of the connecting rod (3) is connected to the front end of the piston rod of the oil cylinder (5), the rear end of the extrusion pin (1) is connected to the other end of the connecting rod (3), the extrusion pin sleeve (2) is sleeved on the extrusion pin (1) and axially slides with the extrusion pin, the connecting sleeve (4) is sleeved on the outside of the connecting rod (3), and the connecting sleeve (4) has a movable cavity for axial movement of the connecting rod (3), one end of the connecting sleeve (4) abuts against the cylinder body of the oil cylinder (5), and the other end abuts against the rear end of the extrusion pin sleeve (2).
2. The extrusion pin quick-change structure according to claim 1, characterized in that: The outer side surface of the extruded pin sleeve (2) is in the shape of a three-step shaft from small to large, and the inner hole of the extruded pin sleeve (2) is in the shape of a two-step hole from small to large.
3. The extrusion pin quick-change structure according to claim 1, characterized in that: The connecting rod (3) has a T-shaped embedding groove, the disc head at the rear end of the extrusion pin (1) is limited in the T-shaped embedding groove, and a pressure plate (6) is provided on the side of the connecting rod (3) and is screwed to the connecting rod (3) to cover the T-shaped embedding groove.
4. The extrusion pin quick-change structure according to claim 1, characterized in that: A touch block (7) is provided on one side of the rear portion of the connecting rod (3), and a touch limit block (8) is provided on one side of the oil cylinder (5). The upper front end of the touch limit block (8) has a rectangular limit ring (9), and the upper end of the touch block (7) extends into the rectangular limit ring (9). A travel switch (10) is provided at the rear end of the touch limit block (8), and the travel switch (10) corresponds to the touch block (7).