CN212634318U - Precision spring forming die - Google Patents

Abstract

The utility model discloses a precision spring forming die belongs to mould technical field, and in mainly solving precision spring injection moulding, the flow is not smooth, causes the finished product texture inhomogeneous, and the inhomogeneous scheduling problem of elasticity distribution, including first section mould, second section mould and shaping post, be provided with first die cavity in the first section mould, be provided with the second die cavity in the second section mould, be provided with the air current mouth in order to discharge gas that feeds through the export of second die cavity on the second section mould, the shaping post is located with heating fusion form raw materials between first section mould and the second section mould. The utility model is used for in the accurate spring injection moulding, during the melting form raw materials pour into the shaping chamber, flow smooth and easy, the non-resistance, finished product density is even, do not contain the bubble, and inside elasticity distributes evenly, and the quality is reliable.

Description

Precision spring forming die

Technical Field

The utility model relates to the technical field of mold, more specifically say, the utility model relates to an accurate spring forming die.

Background

The traditional spring forming process comprises cold machining and hot machining, the cold machining comprises a cold rolling method, a steel wire raw material is processed in a winding mode, but the efficiency is not high, the spring distance is not well controlled in the winding process, demolding is not good, and the hot machining is not suitable for precise springs. Metal injection moulding is a novel metal moulding technology, can make the comparatively complicated product of molding, like the spring, adds the adhesive with powdered metal, reheats to the molten state and flows into the molding chamber again, and the shaping after the cooling, but the raw materials meets the condensation easily at the in-process that flows and solidifies, causes the flow not smooth, or is heated inhomogeneously, makes the spring stress everywhere after the shaping different, and other die cavities are sealed completely, and the air can't circulate, hinders the raw materials and flows, all influences the product quality.

Therefore, a precision spring forming die is designed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an accurate spring forming die, the melting form raw materials that the heating shaping post made flow remain higher temperature throughout, and the external air pump of air-flow mouth makes the die cavity be the vacuum form, all makes the raw materials shaping that easily flows, makes the product not contain the bubble, and density is even, and elasticity is even.

The utility model provides a precision spring forming die, including first section mould, second section mould and shaping post, be provided with first die cavity in the first section mould, be provided with the second die cavity in the second section mould, be provided with the air current mouth of intercommunication second die cavity export on the second section mould with exhaust gas, the shaping post is located with heating fusion form raw materials between first die cavity and the second die cavity.

In a preferred embodiment, the first section mould and the second section mould are both slidably arranged on a base, side plates are vertically arranged on both sides of the base, and a plurality of hydraulic rods are arranged on the side plates and are respectively connected with the first section mould and the second section mould so as to drive the first section mould and the second section mould to approach or separate from each other.

In a preferred embodiment, an injection port is arranged at the top of the first forming die, an injection channel is arranged in the first forming die, and one end of the injection channel is communicated with the injection port while the other end is communicated with the first cavity.

In a preferred embodiment, an air flow channel is arranged in the second die cavity, one end of the air flow channel is communicated with the air flow port, the other end of the air flow channel is communicated with the second die cavity, and a filter screen is arranged in the air flow channel.

In a preferred embodiment, the forming column is hollow inside and provided with heating wires.

The utility model discloses a technological effect and advantage:

first die cavity and second die cavity enclose to close around the shaping post, form the spring shaping chamber, and the shaping post generates heat and heats melting form raw materials, and when melting form raw materials flowed, can be discharged the air in the spring shaping intracavity from the air current mouth, and melting form raw materials can smoothly flow in the spring shaping chamber all the time, and the spring texture after the cooling shaping is even, tight real, does not have the bubble, and inside elasticity distributes evenly, and the quality is reliable.

Drawings

Fig. 1 is an overall front view of a first mold and a second mold when they are clamped together;

FIG. 2 is an overall front view of the first and second dies when separated;

FIG. 3 is a front view of the internal structure of the first mold, the second mold, the forming post and the base;

FIG. 4 is a front view of the internal structure of the forming post;

FIG. 5 is a top view of the first mold, the second mold, and the forming post;

fig. 6 is an enlarged schematic view of a portion a of fig. 3.

Description of reference numerals: 1. a base; 11. a side plate; 12. a hydraulic lever; 13. a first chute; 14. a second chute; 2. a first mold; 21. an injection port; 22. a first cavity; 23. a first bump; 24. an injection channel; 3. a second mold; 31. an airflow port; 32. a second cavity; 33. a second bump; 34. an air flow channel; 35. filtering with a screen; 4. forming a column; 41. heating wires; 42. a power line.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

A precision spring forming die is shown in figures 1-6 and comprises a first die 2, a second die 3 and a forming column 4, wherein a first cavity 22 is arranged in the first die 2, a second cavity 32 is arranged in the second die 3, the first cavity 22 and the second cavity 32 are communicated after being abutted against each other and form a forming cavity for forming a spring, an air flow opening 31 communicated with an outlet of the second cavity 32 is arranged on the second die 3 to discharge air, the forming column 4 is arranged between the first cavity 22 and the second cavity 32 to heat and melt raw materials, and the forming column 4 is arranged in the middle of the forming cavity.

When the molten raw material flows in the molding cavity, the extruded gas is discharged from the airflow port 31, the molding column 4 heats the molten raw material all the time, the molten raw material flows smoothly in the molding cavity, the cooled and molded spring is uniform in texture, and the internal stress is uniform.

The first section mould 2 and the second section mould 3 are arranged on the base 1 in a sliding mode, a first protruding block 23 is arranged at the bottom of the first section mould 2, a second protruding block 33 is arranged at the bottom of the second section mould 3, a first sliding groove 13 and a second sliding groove 14 are arranged on the base 1 corresponding to the first protruding block 23 and the second protruding block 33, the first protruding block 23 and the second protruding block 33 can respectively slide in the first sliding groove 13 and the second sliding groove 14, the first section mould 2 and the second section mould 3 can slide on the base 1, and the first section mould 2 and the second section mould 3 can be close to a matched mould or far away from a split mould.

The equal vertical curb plate 11 that is provided with in base 1's both sides all is provided with a plurality of hydraulic stem 12 on the curb plate 11, and first section mould 2 and second type mould 3 are connected respectively to hydraulic stem 12, and the concertina movement of hydraulic stem 12 drives first section mould 2 and second type mould 3 and is close to each other or keep away from.

An injection port 21 is arranged at the top of the first mould 2, an injection channel 24 is arranged in the first mould 2, one end of the injection channel 24 is communicated with the injection port 21, the other end of the injection channel 24 is communicated with the first mould cavity 22, and molten metal raw materials are injected through the injection port 21 and enter the first mould cavity 22 and the second mould cavity 32 through the injection channel 24 for forming.

An air flow channel 34 is arranged in the second die 3, one end of the air flow channel 34 is communicated with the air flow port 31, the other end of the air flow channel 34 is communicated with the second die cavity 32, a filter screen 35 is arranged in the air flow channel 34, and filter holes with small aperture are arranged on the filter screen 35.

When the molten raw material flows in the first cavity 22 and the second cavity 32, air in the molding cavity is extruded and overflows from the airflow port 31 through the filter screen 35, the filter screen 35 prevents the molten raw material from flowing out to the outside, the molten raw material flows through the whole molding cavity, and the spring is formed after cooling.

The airflow port 31 can also be externally connected with an air pipe and an air pump, the air pump pumps out air in the molding cavity through the airflow port 31, and negative pressure is generated in the molding cavity, so that smooth flowing of the molten raw materials in the molding cavity is facilitated.

The molding column 4 is hollow and provided with a heating wire 41, the heating wire 41 is provided with a power cord 42, and the power cord 42 is connected with an external power supply to heat the heating wire 41 and heat the whole molding column 4, thereby heating the molten raw material.

In conclusion, the hydraulic rod 12 drives the first mold 2 and the second mold 3 to be closed, the first mold cavity 22 and the second mold cavity 32 enclose and form a whole spring-shaped molding cavity, the molding column 4 is positioned in the center of the molding cavity, i.e., the first cavity 22 and the second cavity 32, surround the molding column 4, and a molten raw material is injected into the first cavity 22 through the injection port 21, the melted raw material flows in the whole molding cavity, the air in the molding cavity is extruded out of the molding cavity through the airflow port 31 (the airflow port 31 can be externally connected with an air pipe and an air pump), the heating wire 41 heats the surrounding temperature of the molding column 4 to always heat the melted raw material, the melting raw material can flow smoothly in the molding cavity, after the whole molding cavity is filled, the molding column 4 stops heating, the melting raw material is naturally cooled and molded, and the first molding die 2 and the second molding die 3 are separated to obtain the spring part (at this time, the spring part surrounds the molding column 4).

It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present disclosure, all other embodiments obtained by a person of ordinary skill in the art and related fields without creative efforts shall fall within the protection scope of the present disclosure. The structures, devices, and methods of operation of the present invention, not specifically described and illustrated, are generally practiced by those of ordinary skill in the art without specific recitation or limitation.

Claims (5)

1. The utility model provides a precision spring forming die, characterized by includes first section mould, second section mould and shaping post, be provided with first die cavity in the first section mould, be provided with the second die cavity in the second section mould, be provided with the air current mouth in order to discharge gas that intercommunication second die cavity exports on the second section mould, the shaping post is located with heating melt form raw materials between first die cavity and the second die cavity.

2. The precision spring forming die as claimed in claim 1, wherein the first die and the second die are slidably disposed on a base, side plates are vertically disposed on two sides of the base, and a plurality of hydraulic rods are disposed on each side plate and respectively connected to the first die and the second die to drive the first die and the second die to approach or separate from each other.

3. The precision spring forming die of claim 2, wherein an injection port is formed in the top of the first die, an injection passage is formed in the first die, and one end of the injection passage is communicated with the injection port while the other end is communicated with the first cavity.

4. The precision spring forming die of claim 3, wherein an air flow channel is formed in the second die cavity, one end of the air flow channel is communicated with the air flow port, the other end of the air flow channel is communicated with the second die cavity, and a filter screen is arranged in the air flow channel.

5. The precise spring forming die of claim 4, wherein the forming column is hollow and provided with heating wires.

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