CN216938360U

CN216938360U - Core-pulling exhaust device of steering gear

Info

Publication number: CN216938360U
Application number: CN202123031930.8U
Authority: CN
Inventors: 勾建勇; 李政
Original assignee: Yangzhou Rongtai Precision Die Casting Co ltd
Current assignee: Yangzhou Rongtai Precision Die Casting Co ltd
Priority date: 2021-12-06
Filing date: 2021-12-06
Publication date: 2022-07-12
Anticipated expiration: 2031-12-06

Abstract

The utility model relates to a core-pulling exhaust device of a steering gear. The exhaust device comprises a die-casting die and a molten metal filling mechanism; the die-casting die comprises a first die component and a second die component which are symmetrical to each other, a cavity is formed in the middle of the first die component and the second die component, a flow path is arranged between the first die component and the second die component and communicated with the cavity, one end of the flow path is communicated to the outside of the die-casting die, and the other end of the flow path is communicated to a molten metal filling mechanism; the molten metal filling mechanism comprises a sleeve, a molten metal injection port, a first push rod and a punch, wherein the sleeve is communicated with a flow path, the first push rod and the punch are arranged in the sleeve, the first push rod is fixedly connected with the punch, the first push rod drives the punch to move back and forth in the sleeve, and the molten metal injection port is arranged on the sleeve. The utility model can effectively avoid the defects of air holes and the like generated in the die casting, fills the molten metal into the cavity, and exhausts the air in the cavity, thereby ensuring the internal quality of the die casting.

Description

Core-pulling exhaust device of steering gear

Technical Field

The utility model relates to a die casting core-pulling exhaust device, in particular to a steering gear core-pulling exhaust device.

Background

The die casting process is a method for filling a die-casting die cavity with liquid or semi-liquid metal at high speed under the action of high pressure and quickly solidifying under the pressure to obtain a casting. The mold used is called a die casting mold.

When in production, raw materials are pressed into a die cavity from a die-casting opening, air exists in the die cavity at the moment, the temperature of the materials is high, gas can expand, if the gas is not exhausted in time, the product can occupy the space of the die cavity due to the gas, the product is lack of materials, and the like, so that the die-casting die is required to be provided with an exhaust structure.

At present, the domestic die-casting mold is single in exhaust design and poor in effect, and a fixed exhaust sieve and an ejection integrated exhaust are adopted for exhausting, but the exhaust effect is poor, and the problems of holes and subcutaneous air holes are still easy to occur.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a core-pulling exhaust device of a steering gear, which aims to solve the problems in the prior art.

The technical scheme of the utility model is as follows: the core-pulling exhaust device of the steering gear comprises a die-casting die and a molten metal filling mechanism;

the die-casting die comprises a first die component and a second die component which are symmetrical to each other, a cavity is formed in the middle of the first die component and the second die component, a flow path is arranged between the first die component and the second die component and communicated with the cavity, one end of the flow path is communicated to the outside of the die-casting die, and the other end of the flow path is communicated to a molten metal filling mechanism;

the molten metal filling mechanism comprises a sleeve, a molten metal injection port, a first push rod and a punch, wherein the sleeve is communicated with a flow path, the first push rod and the punch are arranged in the sleeve, the first push rod is fixedly connected with the punch, the first push rod drives the punch to move back and forth in the sleeve, and the molten metal injection port is arranged on the sleeve.

Preferably, the exhaust device further comprises a telescopic sealing mechanism, the telescopic sealing mechanism is arranged in the second mold assembly, the telescopic sealing mechanism comprises a ramp, a second push rod and a thin sheet, the ramp is arranged in the second mold assembly and communicated with the flow path, the second push rod is arranged in the ramp, and the thin sheet is fixedly connected to the front end of the second push rod.

Preferably, the sheet is arranged at the communication part of the ramp and the flow path, and the size of the sheet is consistent with the inner diameter of the ramp.

The beneficial effects of the utility model are: the defects of air holes and the like generated in the die casting can be effectively avoided, and the die casting is particularly widely applied to the production of die casting of Mg alloy, such as: the steering gear shell and the camshaft cover cap are isostatically cast. And before the metal liquid is filled into the die cavity, the core pulling exhaust fills the metal liquid into the die cavity, and exhausts air in the die cavity, so that the internal quality of the die casting is ensured.

Drawings

Fig. 1 is a schematic structural view of the present invention.

In the figure, 1 is a first die assembly, 2 is a second die assembly, 3 is a cavity, 4 is a flow path, 5 is a sleeve, 6 is a molten metal injection port, 7 is a first push rod, 8 is a punch, 9 is a ramp, 10 is a second push rod, and 11 is a sheet.

Detailed Description

A core-pulling exhaust device of a steering gear comprises a die-casting die and a molten metal filling mechanism;

the die-casting die comprises a die component I1 and a die component II 2 which are symmetrical to each other, a cavity 3 is formed in the middle of the die component I1 and the die component II 2, a flow path 4 is arranged between the die component I1 and the die component II 2, the flow path 4 is communicated with the cavity 3, one end of the flow path 4 is communicated to the outside of the die-casting die, and the other end of the flow path 4 is communicated to a molten metal filling mechanism;

the molten metal filling mechanism comprises a sleeve 5, a molten metal injection port 6, a first push rod 7 and a punch 8, wherein the sleeve 5 is communicated with the flow path 4, the first push rod 7 and the punch 8 are arranged in the sleeve 5, the first push rod 7 is fixedly connected with the punch 8, the first push rod 7 drives the punch 8 to move back and forth in the sleeve 5, and the molten metal injection port 6 is arranged on the sleeve 5.

The exhaust device further comprises a telescopic sealing mechanism, the telescopic sealing mechanism is arranged in the second die assembly 2 and comprises a ramp 9, a second push rod 10 and a sheet 11, the ramp 9 is arranged in the second die assembly 2 and communicated with the flow path 4, the second push rod 10 is arranged in the ramp 9, and the sheet 11 is fixedly connected to the front end of the second push rod 10.

The thin sheet 11 is arranged at the communication part of the ramp 9 and the flow path 4, and the size of the thin sheet 11 is consistent with the inner diameter of the ramp 9.

Before filling the molten metal, a first die component 1 and a second die component 2 are attached, the molten metal is injected into a sleeve 5 through a molten metal injection port 6, at the moment, a first push rod 7 is pushed by external power to drive a punch 8 to stably push the molten metal forwards at a certain speed, then the first push rod 7 is retracted to inject the molten metal into the sleeve 5 again, the first push rod 7 extends out to push the molten metal forwards for a plurality of times, the sleeve 5 is communicated with a flow path 4, the molten metal enters a cavity 3 slowly under the pushing of the first push rod 7 until the whole flow path 4 and the cavity 3 are filled, so that the air in the die-casting die is exhausted, at the moment, a second push rod 10 is driven by the external power to drive a sheet 11 to extend out from a ramp 9, the ramp 9 is communicated with the flow path 4, the sheet 11 is pushed into the flow path 4 to seal the whole cavity 3, and the first push rod 7 is retracted simultaneously, and finishing the filling process of the molten metal.

According to the utility model, air in the cavity 3 can be effectively exhausted, the internal quality of a product is ensured, and practical test results show that the air in the cavity 3 can be exhausted in a short time by using core-pulling exhaust, so that the production efficiency of die castings is improved; because the exhausted air flow is not discharged in a jet mode, the molten aluminum is prevented from being injected outside the die, the efficient exhaust process is the key for ensuring that no air holes exist in the casting, the requirements of mass production and low-cost mass production of the automobile steering gear are met, and the method is suitable for the die-casting manufacturing industry of steering gear shells, camshaft covers and the like.

In the present invention, unless otherwise explicitly specified or limited, for example, it may be fixedly attached, detachably attached, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

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

Claims

1. The utility model provides a redirector exhaust apparatus of loosing core which characterized in that: the exhaust device comprises a die-casting die and a molten metal filling mechanism;

the die-casting die comprises a first die component (1) and a second die component (2) which are symmetrical to each other, a cavity (3) is formed in the middle of the first die component (1) and the middle of the second die component (2), a flow path (4) is arranged between the first die component (1) and the second die component (2), the flow path (4) is communicated with the cavity (3), one end of the flow path (4) is communicated to the outside of the die-casting die, and the other end of the flow path is communicated to a molten metal filling mechanism;

the molten metal filling mechanism comprises a sleeve (5), a molten metal injection port (6), a first push rod (7) and a punch (8), wherein the sleeve (5) is communicated with a flow path (4), the first push rod (7) and the punch (8) are arranged in the sleeve (5), the first push rod (7) is fixedly connected with the punch (8), the first push rod (7) drives the punch (8) to move back and forth in the sleeve (5), and the molten metal injection port (6) is arranged on the sleeve (5).

2. The diverter core-pulling exhaust device according to claim 1, characterized in that: the exhaust device further comprises a telescopic sealing mechanism, the telescopic sealing mechanism is arranged in the second die assembly (2), the telescopic sealing mechanism comprises a ramp (9), a second push rod (10) and a sheet (11), the ramp (9) is arranged in the second die assembly (2) and communicated with the flow path (4), the second push rod (10) is arranged in the ramp (9), and the sheet (11) is fixedly connected to the front end of the second push rod (10).

3. The diverter core-pulling exhaust device according to claim 2, characterized in that: the thin sheet (11) is arranged at the communicating part of the ramp (9) and the flow path (4), and the size of the thin sheet (11) is consistent with the inner diameter of the ramp (9).