Long-service-life injection punch for high-vacuum die casting

Abstract

The utility model relates to a long-service-life injection punch for high-vacuum die casting. The punch comprises a punch body and a sealing assembly arranged on the outer side of the punch body, the sealing assembly comprises a front copper ring, a main copper ring and a rear steel ring, the main copper ring is fixed to the middle of the outer side of the punch body through a copper ring fixing sleeve, and the front copper ring and the rear steel ring are fixed to the front side and the rear side of the main copper ring respectively. A pressing ring end cover is fixedly arranged at the rear end of the punch body and abuts against the rear portion of the rear steel ring. The sealing performance is good, the defects of air holes, cold shut and the like can be reduced, and the casting density and surface smoothness are improved; the sealing assembly effectively reduces scouring and corrosion of molten metal to the inner wall of the injection cylinder, equipment abrasion is reduced, the service life of equipment is prolonged, meanwhile, the production cost is reduced, the shutdown maintenance frequency caused by leakage is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to a sealing punch, and more particularly to a long-life injection punch for high vacuum die casting. Background Technology

[0002] In the die-casting process, the punch needs to push molten metal at high speed to fill the mold under high pressure (typically tens to hundreds of megapascals). The design of the sealed punch ensures that the gap between the injection cylinder and the punch is effectively sealed, preventing leakage of molten metal or gas, thus maintaining stable pressure transmission, preventing oxide slag from entering, and reducing the ingress of external air or oxide slag into the molten metal flow. This reduces defects such as porosity and inclusions inside the casting and minimizes energy loss. However, if the seal fails, it will lead to pressure loss, affecting the filling speed of the molten metal and the quality of the casting. Utility Model Content

[0003] The purpose of this invention is to provide a long-life injection punch for high-vacuum die casting, so as to solve the problems in the prior art.

[0004] The technical solution of this utility model is: a high-life injection punch for high vacuum die casting, the punch including a punch body and a sealing assembly disposed on the outside of the punch body, the sealing assembly including a front copper ring, a main copper ring and a rear steel ring, the main copper ring being fixed to the middle of the outside of the punch body by a copper ring fixing sleeve, the front copper ring and the rear steel ring being fixed to the front and rear sides of the main copper ring respectively, and a pressure ring end cap being fixedly provided at the rear end of the punch body, the pressure ring end cap abutting against the rear part of the rear steel ring.

[0005] Furthermore, a spring is connected to the main copper ring.

[0006] Furthermore, the punch body is provided with a water core inside, and the water core is provided with a nozzle and a water core outlet, and the water core outlet is connected to the nozzle.

[0007] Furthermore, a sealing ring is provided on the inner wall of the water core.

[0008] The beneficial effects of this utility model are: good sealing performance can reduce defects such as porosity and cold shuts, and improve the density and surface finish of castings; the sealing component effectively reduces the scouring and corrosion of the inner wall of the injection cylinder by molten metal, reduces equipment wear, extends equipment life, and at the same time reduces production costs, reduces the frequency of downtime maintenance caused by leakage, and improves production efficiency. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model.

[0010] In the diagram, 1 is the punch body, 2 is the front copper ring, 3 is the main copper ring, 4 is the rear steel ring, 5 is the copper ring fixing sleeve, 6 is the pressure ring end cap, 7 is the spring, 8 is the water core, 9 is the water core outlet, and 10 is the sealing ring. Detailed Implementation

[0011] A high-life injection punch for high-vacuum die casting includes a punch body 1 and a sealing assembly disposed on the outside of the punch body 1. The sealing assembly includes a front copper ring 2, a main copper ring 3, and a rear steel ring 4. The main copper ring 3 is fixed to the middle of the outside of the punch body 1 by a copper ring fixing sleeve 5. The front copper ring 2 and the rear steel ring 4 are respectively fixed to the front and rear sides of the main copper ring 3. A pressure ring end cap 6 is fixedly provided at the rear end of the punch body 1, and the pressure ring end cap 6 abuts against the rear part of the rear steel ring 4.

[0012] A spring 7 is connected to the main copper ring 3.

[0013] The punch body 1 is provided with a water core 8 inside, and the water core 8 is provided with a nozzle and a water core outlet 9. The water core outlet 9 is connected to the nozzle.

[0014] A sealing ring 10 is provided on the inner wall of the water core 8.

[0015] The outer wall of the punch body 1 is multi-step, with the step height gradually decreasing from the front to the middle of the punch body. The front copper ring 2 is fixedly mounted on the step, and the main copper ring 3 is fixed to the outside of the punch body 1 by the copper ring fixing sleeve 5 and abuts against the front copper ring 2. The spring 7 on the main copper ring 3 is radially arranged to ensure that the gap between the injection cylinder and the punch is effectively sealed. The sealing ring 10 set on the inner wall of the water core 8 can effectively prevent the leakage of molten metal or gas, thereby maintaining stable pressure transmission and preventing oxide slag from entering. Good sealing performance can reduce the entry of external air or oxide slag into the molten metal flow and reduce defects such as porosity and inclusions inside the casting.

[0016] In the description of this utility model, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0017] In this utility model, unless otherwise explicitly specified and limited, for example, it can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components or an interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0018] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-life injection punch for high-vacuum die casting, characterized in that: The punch includes a punch body (1) and a sealing assembly disposed on the outside of the punch body (1). The sealing assembly includes a front copper ring (2), a main copper ring (3) and a rear steel ring (4). The main copper ring (3) is fixed to the middle of the outside of the punch body (1) by a copper ring fixing sleeve (5). The front copper ring (2) and the rear steel ring (4) are respectively fixed on the front and rear sides of the main copper ring (3). A pressure ring end cap (6) is fixedly provided at the rear end of the punch body (1). The pressure ring end cap (6) abuts against the rear part of the rear steel ring (4).

2. The high-life injection punch for high-vacuum die casting according to claim 1, characterized in that: A spring (7) is connected to the main copper ring (3).

3. A high-life injection punch for high-vacuum die casting according to claim 1, characterized in that: The punch body (1) is provided with a water core (8) inside, and the water core (8) is provided with a nozzle and a water core outlet (9). The water core outlet (9) is connected to the nozzle.

4. A high-life injection punch for high-vacuum die casting according to claim 3, characterized in that: The water core (8) is provided with a sealing ring (10) on its inner wall.

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