CN219541662U

CN219541662U - Injection punch of die casting die

Info

Publication number: CN219541662U
Application number: CN202320498932.8U
Authority: CN
Inventors: 文焱; 白明月; 方建儒; 宋清和
Original assignee: Dalian Yaming Automotive Parts Co ltd
Current assignee: Dalian Yaming Automotive Parts Co ltd
Priority date: 2023-03-15
Filing date: 2023-03-15
Publication date: 2023-08-18
Anticipated expiration: 2033-03-15

Abstract

The utility model discloses a die casting die injection punch, which comprises a punch body, wherein the punch body is provided with a first annular groove; a first sealing ring is sleeved in the first annular groove; one side of the first sealing ring is provided with a first expansion joint, one side of the first expansion joint is provided with a sealing groove, and the other side of the first expansion joint is provided with a first sealing block; the first seal ring is made of a metal material with a high thermal expansion coefficient. The injection punch has good sealing performance and can ensure the processing quality of high-vacuum castings.

Description

Injection punch of die casting die

Technical Field

The utility model relates to the technical field of die casting, in particular to a die casting die injection punch.

Background

Among many die casting processes, the high-vacuum die casting process has the advantages of reducing air holes in castings, improving the mechanical properties of materials, being suitable for the production of high-strength and high-toughness complex thin-wall parts, and particularly having strong technical and efficiency advantages in the manufacture of automobile stress parts.

One of the key technologies of the high-vacuum die casting process is the sealing of the injection punch, and the conventional injection punch used at home and abroad is designed for common die casting at present, and a certain gap is reserved between the injection punch and the inner wall of the injection chamber because the injection punch needs to move at a high speed in the injection chamber. When high-vacuum die casting is performed, external air easily enters the injection chamber and the die cavity through the gap, so that the problem of air hole defects on the surface or in the product is caused.

Disclosure of Invention

In view of the above-described drawbacks or shortcomings in the prior art, it is desirable to provide a die-casting die injection punch that has good sealability and can ensure high vacuum casting processing quality.

The utility model provides a die casting die injection punch, which comprises a punch body, wherein a circle of first annular grooves are formed in the outer wall of the punch body along the circumferential direction; a first sealing ring is sleeved in the first annular groove, and the outer diameter of the first sealing ring is not smaller than the outer diameter of the punch body; a first expansion joint is arranged on one side of the first sealing ring along the direction parallel to the axis of the first sealing ring, a sealing groove is arranged on one side of the first expansion joint, a first sealing block extending into the sealing groove is arranged on the other side of the first expansion joint, and two sides of the first sealing block are attached to the inner wall of the sealing groove; the first sealing ring is made of a metal material with a high thermal expansion coefficient.

Further, the first sealing ring is made of beryllium copper alloy material.

Further, the outer edges at two ends of the first sealing ring are provided with first chamfers.

Further, a second annular groove is formed in one side, located at the first annular groove, of the outer wall of the punch body; a second sealing ring is sleeved in the second annular groove, and the outer diameter of the second sealing ring is the same as that of the first sealing ring; the second sealing ring and the first sealing ring are made of the same material.

Further, the width of second sealing ring is less than the width of first sealing ring, one side of second sealing ring is provided with the second expansion joint along the direction that is on a parallel with its axis, the both sides of second expansion joint are crisscross to be provided with two second sealing blocks, two the adjacent one side of second sealing block laminating mutually.

Further, the outer edges at two ends of the second sealing ring are provided with second chamfers.

Compared with the prior art, the utility model has the beneficial effects that:

(1) According to the injection punch, the annular groove is formed in the punch body, the sealing ring is arranged in the annular groove and made of a metal material with a high thermal expansion coefficient, and when high-vacuum die casting is performed, the sealing ring is heated and expanded, so that the size of the sealing ring can be automatically adjusted according to a gap between the punch body and the injection chamber, and self-sealing is realized. The expansion joint is arranged on the sealing ring, so that the thermal expansion performance is fully exerted, the sealing effect is good, and the processing quality of castings is ensured.

(2) The edges at the two ends of the sealing ring are provided with the chamfers, so that the sealing ring is convenient to install and detach and is beneficial to daily maintenance and replacement of the injection punch.

(3) The sealing ring is made of beryllium copper alloy material, and has the advantages of high thermal expansion coefficient, good ductility and good sealing effect. The high-temperature heat-conducting material has excellent mechanical property, heat conductivity, high-temperature performance and wear resistance, can meet the requirements of high speed, high temperature and wear resistance of stamping of a die casting machine, and has longer service life.

It should be understood that the description in this summary is not intended to limit the critical or essential features of the embodiments of the utility model, nor is it intended to limit the scope of the utility model. Other features of the present utility model will become apparent from the description that follows.

Drawings

Other features, objects and advantages of the present utility model will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the accompanying drawings in which:

fig. 1 is a schematic structural view of an injection punch of a die casting die;

fig. 2 is a schematic cross-sectional structure of an injection punch of a die casting die.

Reference numerals in the drawings: 1. a punch body; 2. a first seal ring; 3. a second seal ring;

11. a first ring groove; 12. a second ring groove;

21. a first expansion joint; 22. sealing grooves; 23. a first sealing block; 24. a first chamfer;

31. a second expansion joint; 32. a second sealing block; 33. and (5) a second chamfer.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be noted that, for convenience of description, only the portions related to the utility model are shown in the drawings.

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

Referring to fig. 1-2, an embodiment of the present utility model provides a die casting die injection punch, including a punch body 1, wherein a circle of first ring grooves 11 are circumferentially arranged on an outer wall of the punch body 1; the first annular groove 11 is sleeved with a first sealing ring 2, and the outer diameter of the first sealing ring 2 is not smaller than the outer diameter of the punch body 1; one side of the first sealing ring 2 is provided with a first expansion joint 21 along the direction parallel to the axis of the first sealing ring, one side of the first expansion joint 21 is provided with a sealing groove 22, the other side is provided with a first sealing block 23 extending into the sealing groove 22, and two sides of the first sealing block 23 are attached to the inner wall of the sealing groove 22; the first seal ring 2 is made of a metal material having a high thermal expansion coefficient.

In this embodiment, when the high-vacuum die casting operation is performed, the punch body 1 is inserted into the shot chamber, the first seal ring 2 is thermally expanded, and the size is automatically adjusted according to the gap between the punch body 1 and the shot chamber, thereby realizing self-sealing.

The first expansion joint 21 is provided in the first seal ring 2 so that the thermal expansion performance is fully utilized. And be provided with the seal structure that first sealing block 23 and seal groove 22 matched with in the first expansion joint 21, after the thermal expansion of first sealing ring 2, first sealing block 23 expands tightly in seal groove 22, has realized the seal of first expansion joint 21.

The injection punch has good sealing effect and ensures the processing quality of castings.

In a preferred embodiment, the first sealing ring 2 is made of beryllium copper alloy material, and self-sealing of the injection punch is realized by utilizing the characteristics of high thermal expansion coefficient and good ductility of copper of the beryllium copper alloy. The beryllium copper alloy has excellent mechanical property, thermal conductivity, high-temperature performance and wear resistance, can meet the requirements of high speed, high temperature and wear resistance of stamping of a die casting machine, and has longer service life.

In a preferred embodiment, as shown in fig. 1 and 2, the outer edges of the two ends of the first sealing ring 2 are provided with first chamfers 24, so that the mounting and dismounting of the injection punch are more convenient, and the daily maintenance and replacement are facilitated.

In a preferred embodiment, as shown in fig. 1 and 2, a second annular groove 12 is provided on the outer wall of the punch body 1 at one side of the first annular groove 11; a second sealing ring 3 is sleeved in the second annular groove 12, and the outer diameter of the second sealing ring 3 is the same as that of the first sealing ring 2; the second seal ring 3 is made of the same material as the first seal ring 2.

In the embodiment, by arranging two sealing rings, the sealing effect of the injection punch is further improved.

In a preferred embodiment, as shown in fig. 1 and 2, the width of the second sealing ring 3 is smaller than that of the first sealing ring 2, one side of the second sealing ring 3 is provided with a second expansion joint 31 along a direction parallel to the axis of the second sealing ring, two second sealing blocks 32 are alternately arranged on two sides of the second expansion joint 31, and two adjacent sides of the second sealing blocks 32 are attached.

In this embodiment, the second seal ring 3 with smaller width is matched with the first seal ring 2, so that an excellent sealing effect can be achieved. The second expansion joint 31 of the second seal ring 3 can improve the expansion performance and ensure the sealing performance. The second expansion joint 31 is sealed by two second sealing blocks 32 which are in staggered fit. The second expansion joint 31 is staggered with the first expansion joint 21 so as to improve the sealing effect of the two sealing rings.

In a preferred embodiment, as shown in fig. 1 and 2, the outer edges of the two ends of the second sealing ring 3 are provided with second chamfers 33, so that the installation and the disassembly of the injection punch are more convenient, and the daily maintenance and the replacement are facilitated.

In the description of the present specification, the terms "connected," "mounted," "secured," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, the terms "one embodiment," "some embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The injection punch of the die casting die is characterized by comprising a punch body, wherein a circle of first annular grooves are formed in the outer wall of the punch body along the circumferential direction; a first sealing ring is sleeved in the first annular groove, and the outer diameter of the first sealing ring is not smaller than the outer diameter of the punch body; a first expansion joint is arranged on one side of the first sealing ring along the direction parallel to the axis of the first sealing ring, a sealing groove is arranged on one side of the first expansion joint, a first sealing block extending into the sealing groove is arranged on the other side of the first expansion joint, and two sides of the first sealing block are attached to the inner wall of the sealing groove; the first sealing ring is made of a metal material with a high thermal expansion coefficient.

2. The die casting die injection punch according to claim 1, wherein the first seal ring is made of beryllium copper alloy material.

3. The die casting die injection punch according to claim 1, wherein the outer edges of both ends of the first seal ring are provided with first chamfers.

4. The die casting die injection punch according to claim 1, wherein a second annular groove is provided on the outer wall of the punch body on a side of the first annular groove; a second sealing ring is sleeved in the second annular groove, and the outer diameter of the second sealing ring is the same as that of the first sealing ring; the second sealing ring and the first sealing ring are made of the same material.

5. The injection punch of the die casting die according to claim 4, wherein the width of the second sealing ring is smaller than that of the first sealing ring, a second expansion joint is arranged on one side of the second sealing ring along the direction parallel to the axis of the second sealing ring, two second sealing blocks are arranged on two sides of the second expansion joint in a staggered mode, and two adjacent sides of the second sealing blocks are attached to each other.

6. A die casting die injection punch as claimed in any one of claims 4 or 5 wherein the outer edges of the two ends of the second seal ring are each provided with a second chamfer.