CN213794217U

CN213794217U - Erosion-resistant powder metallurgy die gate structure

Info

Publication number: CN213794217U
Application number: CN202022392571.8U
Authority: CN
Inventors: 程云; 史广星; 张国增
Original assignee: Jiangsu Sriyi Precision Technology Co ltd
Current assignee: Jiangsu Sriyi Precision Technology Co ltd
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2021-07-27
Anticipated expiration: 2030-10-23

Abstract

The utility model belongs to the technical field of powder metallurgy, a scour protection loses powder metallurgy die gate structure is related to, including sprue, die cavity and the transition runner of connecting sprue and die cavity, the transition runner is including the dashpot that is located between sprue and the die cavity, from the dashpot be connected to the front gate of sprue and from the back runner that the dashpot is connected to the die cavity of dashpot. The sprue can buffer the metal fluid entering the cavity twice, so that the acting force generated on the mold is reduced, the edge of the cavity is prevented from being eroded, and the service life of the mold is prolonged.

Description

Erosion-resistant powder metallurgy die gate structure

Technical Field

The utility model relates to a powder metallurgy technical field, in particular to scour protection loses powder metallurgy die runner structure.

Background

Powder metallurgy is a process technique for producing metal powder or metal powder (or a mixture of metal powder and nonmetal powder) as a raw material, and then forming and sintering the raw material to produce metal materials, composite materials and various products. Some intelligent electronic terminal parts are manufactured by powder metallurgy. The product molding requires that a machine table has enough injection force in the molding process, the injection force is large, the problem of a mold is easily caused, and the conventional gate mode easily causes mold erosion, so that the service life of the mold is influenced, and the functional requirements of the product are met.

There is therefore a need for an improved gate structure to address the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides a scour protection loses powder metallurgy die gate structure can avoid fast-speed metal fluid direct impact die cavity edge and cause the erosion.

The utility model discloses a following technical scheme realizes above-mentioned purpose: the utility model provides an scour protection powder metallurgy die gate structure, includes sprue, die cavity and connects the transition runner of sprue and die cavity that sprue, transition runner include the dashpot that is located between sprue and the die cavity, from the dashpot be connected to the front gate of sprue and from the back runner that the dashpot is connected to the die cavity of sprue.

Specifically, the extending direction of the front gate inclines to the flowing direction of the main runner, and the extending direction of the rear gate is perpendicular to the side edge of the cavity.

Specifically, the buffer slot is a strip extending along the edge of the cavity, and a plurality of front gates and a plurality of rear gates are arranged on two sides of the buffer slot.

Further, the front gate and the rear gate are staggered from each other.

Specifically, a plurality of thimble holes are arranged below the buffer groove.

Adopt above-mentioned technical scheme, the utility model discloses technical scheme's beneficial effect is:

the sprue can buffer the metal fluid entering the cavity twice, so that the acting force generated on the mold is reduced, the edge of the cavity is prevented from being eroded, and the service life of the mold is prolonged.

Drawings

FIG. 1 is a schematic structural diagram of a gate structure of an erosion-resistant powder metallurgy mold according to an embodiment.

The figures in the drawings represent:

1-a main runner;

2-a cavity;

31-buffer groove, 311-thimble hole, 32-front gate, 33-back gate.

Detailed Description

The present invention will be described in further detail with reference to specific examples.

Example (b):

as shown in fig. 1, the utility model discloses an erosion-preventing powder metallurgy die gate structure, including sprue 1, die cavity 2 and the transition runner of connecting sprue 1 and die cavity 2, the transition runner is including the dashpot 31 that is located between sprue 1 and die cavity 2, the front gate 32 that is connected to sprue 1 from dashpot 31 and the back gate 33 that is connected to die cavity 2 from dashpot 31. In practical production, the high-speed metal fluid in the main runner 1 must pass through the transition runner to enter the cavity 2, the front gate 32 and the rear gate 33 are both relatively narrow runners, and the buffer slot 31 is a space with a larger width direction, so that the metal fluid enters the buffer slot 31 from the front gate 32 to generate kinetic energy release, the erosion to the inner wall can be greatly reduced after the speed is reduced, and then the metal fluid enters the cavity 2 from the buffer slot 31 to undergo one-time speed reduction, so that the impact force of the metal fluid to the cavity 2 is small, the edge of the cavity 2 is prevented from being eroded, and the service life of the mold is prolonged.

As shown in fig. 1, the extending direction of the front gate 32 is inclined to the flowing direction of the main runner 1, and the extending direction of the rear gate 33 is perpendicular to the side of the cavity 2. The direction of the front gate 32 needs to be favorable for the high-pressure metal fluid to enter the buffer tank 31, and the direction of the rear gate 33 needs to be more favorable for the metal fluid to be uniformly diffused, so that the directions of the two are slightly different.

As shown in fig. 1, the buffer slot 31 is a strip extending along the edge of the cavity 2, and a plurality of front gates 32 and a plurality of rear gates 33 are disposed at both sides of the buffer slot 31. Therefore, the metal fluid can uniformly enter the buffer groove 31 and then enter the cavity 2, and the buffer effect is improved.

As shown in fig. 1, the front gate 32 and the rear gate 33 are offset from each other. Therefore, the metal fluid passing through the front gate 32 can impact the side edge of the buffer groove 31 and cannot directly enter the rear gate 33, and after the kinetic energy is released, the metal fluid can enter the cavity 2 through the rear gate 33, so that the buffer effect is improved.

As shown in fig. 1, a plurality of thimble holes 311 are provided below the buffer tank 31. The new structure can bring about the complicated structure of the stub bar and improve the difficulty of stripping. In order to avoid the influence on the main structure of the product caused by the breakage of the stub bar during stripping, the ejector pin is arranged below the buffer slot 31 to eject out the stub bar, so that the new problem of stripping can be avoided, and the post-treatment is convenient.

What has been described above are only some embodiments of the invention. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are within the scope of the invention.

Claims

1. The utility model provides an scour protection loses powder metallurgy die gate structure, includes sprue, die cavity and connects the transition runner of sprue and die cavity, its characterized in that: the transition runner includes a buffer trough between the main runner and the cavity, a front gate connected from the buffer trough to the main runner, and a rear gate connected from the buffer trough to the cavity.

2. The erosion protection powder metallurgy die gate structure of claim 1, wherein: the extending direction of the front pouring gate inclines to the flowing direction of the main runner, and the extending direction of the rear pouring gate is perpendicular to the side edge of the cavity.

3. The erosion protection powder metallurgy die gate structure of claim 1, wherein: the buffer slot is a strip extending along the edge of the cavity, and a plurality of front gates and a plurality of rear gates are arranged on two sides of the buffer slot.

4. The erosion prevention powder metallurgy mold gate structure of claim 3, wherein: the front gate and the rear gate are staggered with each other.

5. The erosion protection powder metallurgy die gate structure of claim 1, wherein: and a plurality of thimble holes are arranged below the buffer groove.