CN211218556U

CN211218556U - Gold type casting mould with floating mould core structure

Info

Publication number: CN211218556U
Application number: CN201920836433.9U
Authority: CN
Inventors: 雒应学; 黄浩; 李洪涛
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-06-04
Filing date: 2019-06-04
Publication date: 2020-08-11
Anticipated expiration: 2029-06-04

Abstract

The utility model discloses a golden mold casting mould with unsteady mold core structure, including relative movable mould and the cover half that sets up, under the compound die state, be formed with a plurality of product die cavity between movable mould and the cover half, be equipped with fixed mold core and unsteady mold core in the product die cavity, fixed mold core is fixed on the movable mould, unsteady mold core is installed on the cover half, be equipped with the elastic component between unsteady mold core and the cover half, the elastic component can make the terminal surface of fixed mold core and unsteady mold core laminate all the time under the compound die state. The utility model discloses a mold core and elastic component float are designed on the cover half that does not have ejection mechanism to ensure that the fixed mold core of both sides and the terminal surface of the mold core that floats are laminated all the time when the compound die, not only guaranteed the quality of foundry goods center hole site, but also prolonged the life of mould.

Description

Gold type casting mould with floating mould core structure

Technical Field

The utility model relates to the technical field of mold, in particular to golden type casting mould with unsteady mold core structure.

Background

In the existing cast iron (such as gray cast iron and nodular cast iron) industry, metal mold (referred to as metal mold for short) casting and sand mold casting are the two most common casting and molding modes, and both the two modes are suitable for batch production of iron product blanks. But along with the more and more strict national control on environmental protection and energy saving, the problems of large dust, more equipment, high noise and the like in sand casting become more prominent. In contrast, the use of metal molds in the foundry industry has shown its advantages again, for example: raw materials such as molding sand, bentonite and the like are not purchased and stored; no sand handling equipment is purchased and maintained; the casting does not need to be cleaned during production, so that no dust is generated to pollute the environment; the reduction in equipment means that the demand for electrical energy is also reduced.

When a workpiece with an inner hole is machined, the inner hole forming mold core main body is designed on one side of a mold (movable mold) with an ejection mechanism according to the characteristics of the inner hole of the product, but because a metal mold is high in temperature and high in production frequency in the production process, the mold core is easy to burn and damage, end face gaps are too large due to foreign matters and the like, the direct consequence is that the inner hole of the product is subjected to edge scraping, and the direct hole plugging is serious. For this reason, no good solution is currently available.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a gold type casting mould with core structure floats to solve the problem that proposes in the above-mentioned background art.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides a golden mould casting mould with core structure floats, includes relative movable mould and the cover half that sets up, under the compound die state, be formed with a plurality of product die cavity between movable mould and the cover half, be equipped with fixed mold core and unsteady mold core in the product die cavity, fixed mold core is fixed on the movable mould, unsteady mold core is installed on the cover half, be equipped with the elastic component between unsteady mold core and the cover half, the elastic component enables the terminal surface of fixed mold core and unsteady mold core to laminate all the time under the compound die state.

Further, the floating mold core comprises a floating mold core body and a fixed column, the first end of the fixed column is connected with the center of the floating mold core body, and the second end of the fixed column penetrates through the fixed mold and then is connected with the outer side wall of the fixed mold.

Further, be equipped with the elastic component standing groove on the cover half in order to install the elastic component, the elastic component is the spring, the spring suit is on the fixed column, the both ends of spring respectively with the terminal surface of unsteady mold core body and the terminal surface butt of elastic component standing groove.

Further, in a free state, the length of the end portion of the spring extending out of the elastic member placing groove is 3 mm.

Furthermore, an opening is formed in the end face, close to the fixed mold core, of the floating mold core body, a through hole is formed in the fixed column, the opening is communicated with the through hole to form a central exhaust hole, a plurality of exhaust grooves are formed in the end face, close to the floating mold core, of the fixed mold core, two ends of each exhaust groove are respectively communicated with the center and the edge of the end face of the fixed mold core, and each exhaust groove is communicated with the central exhaust hole to form an exhaust channel in a mold closing state.

Furthermore, the width of the exhaust groove is 3-5 mm, and the depth is 0.1-0.2 mm.

Further, the fixed column is a bolt, a screw rod of the bolt is in threaded connection with the floating mold core body, and the head of the bolt is abutted to the outer side wall of the fixed mold.

Has the advantages that: the utility model discloses a mold core and elastic component float are designed on the cover half that does not have ejection mechanism to ensure that the fixed mold core of both sides and the terminal surface of the mold core that floats are laminated all the time when the compound die, not only guaranteed the quality of foundry goods center hole site, but also prolonged the life of mould.

Drawings

The invention is further described with reference to the following figures and examples:

fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the fixed mold of the present invention;

FIG. 3 is a schematic view showing the fixed mold core and the floating mold core when the mold is opened;

FIG. 4 is a schematic view of the fixed mold core and the floating mold core of the present invention in the mold closing process;

fig. 5 is a schematic end view of the middle fixed mold core of the present invention.

Detailed Description

Referring to fig. 1 and 2, the utility model relates to a golden mould casting mould with unsteady mold core structure, including relative movable mould 1 and the cover half 2 that sets up, under the compound die state, be formed with a plurality of product die cavity 3 between movable mould 1 and the cover half 2, be equipped with fixed mold core 4 and unsteady mold core in the product die cavity 3, fixed mold core 4 is fixed on movable mould 1, unsteady mold core is installed on cover half 2, be equipped with elastic component 6 between unsteady mold core and the cover half 2, elastic component 6 enables the terminal surface of fixed mold core 4 and unsteady mold core to laminate all the time under the compound die state, consequently, the leakproofness of mold core position has been ensured, thereby the quality of foundry goods center hole site has been guaranteed, and the life of mould has still been prolonged.

The floating mold core comprises a floating mold core body 51 and a fixed column 52, a first end of the fixed column 52 is connected with the center of the floating mold core body 51, and a second end of the fixed column 52 penetrates through the fixed mold 2 and then is connected with the outer side wall of the fixed mold 2. Preferably, the fixed column 52 is a bolt, a screw of the bolt is in threaded connection with the floating mold core body 51, and a head of the bolt is abutted with the outer side wall of the fixed mold 2 to play a limiting role. Preferably, the floating mold core body 51 and the fixed mold core 4 are made of a wear-resistant and high-temperature-resistant heat-conducting material (such as chromium zirconium copper).

The fixed die 2 is provided with an elastic piece placing groove 21 for installing the elastic piece 6, the elastic piece 6 is a spring, preferably a high-temperature-resistant spring, the spring is sleeved on the fixed column 52, and two ends of the spring are respectively abutted against the end face of the floating die core body 51 and the end face of the elastic piece placing groove 21. Preferably, in the free state, the length of the end portion of the spring protruding from the elastic member placing groove 21 is 3mm, and a floating stroke of 3mm is opened by the spring force.

Referring to fig. 3 to 5, an opening 511 is provided on an end surface of the floating mold core body 51 close to the fixed mold core 4, a through hole 521 is provided inside the fixed column 52, the opening 511 is communicated with the through hole 521 to form a central exhaust hole, a plurality of exhaust grooves 41 are provided on an end surface of the fixed mold core 4 close to the floating mold core, two ends of each exhaust groove 41 are respectively communicated with the center and the edge of the end surface of the fixed mold core 4, each exhaust groove 41 is communicated with the central exhaust hole to form an exhaust channel in a mold closing state, and the exhaust channel can exhaust waste gas outwards and guide cooling gas in cooperation with external equipment. Preferably, the width of the exhaust groove 41 is 3 to 5mm, and the depth is 0.1 to 0.2 mm. Specifically, in the actual production process of the metal mold, the annular product is prone to gas trapping in the inner hole (the gas source includes air, water vapor, hydrogen, nitrogen and the like generated by aluminum during molten iron smelting), and if the trapped gas is generated, the trapped gas can directly cause quality defects such as pores, pinholes and the like on the surface or under the skin of the product. Therefore, the end face of the fixed mold core 4 is provided with the exhaust groove 41, the exhaust groove 41 is communicated with the central exhaust hole of the floating mold core in a mold closing state, and therefore, the gas accumulated around the mold core can be actively exhausted by an air exhaust tool on the casting machine in the time period from the beginning of casting molten iron (the temperature of the molten iron is between 1300 and 1400 ℃) to the completion of casting the molten iron, so that the aim of eliminating product air holes is fulfilled.

Because the fixed mold core 4 and the floating mold core are wrapped in the center of the casting, the temperature of the casting is higher, so that the fixed mold core 4 and the floating mold core can be quickly cooled, and the air extracting tool can achieve the purpose of air blowing and cooling. The method comprises the following specific steps: after casting, the surface of the casting begins to harden (the temperature of the casting is about 1000 ℃) under the cooling effect of cooling water. The suction is switched to the blowing line by a changeover valve arranged on the casting machine. Cold air (such as compressed air, nitrogen and the like) provided by peripheral equipment is blown into the central hole position of the product from the central exhaust hole of the floating mold core, so that the fixed mold core 4 and the floating mold core are forced to be rapidly cooled. Simultaneously, because fixed mold core 4 and unsteady mold core body 51 are wear-resisting high temperature resistant heat conduction material, so according to expend with heat and contract with cold principle, fixed mold core 4 and unsteady mold core body 51's volume can contract rapidly this moment, and the product hole size increases to form the demolding clearance between product and mold core, consequently also can normally demold under the condition of the drawing of patterns angle 7 at the mold core design very little (if 0 ~ 0.5 °). Meanwhile, the demoulding angle 7 of 0-0.5 degrees also reduces the machining allowance of the inner hole of the casting during the later mechanical machining, improves the utilization rate of molten iron, and reduces the production cost of casting and mechanical machining.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the scope of knowledge possessed by those skilled in the art.

Claims

1. The utility model provides a gold casting mould with floating core structure which characterized in that: including relative movable mould (1) and cover half (2) that sets up, under the compound die state, be formed with a plurality of product die cavity (3) between movable mould (1) and cover half (2), be equipped with fixed mold core (4) and unsteady mold core in product die cavity (3), fixed mold core (4) are fixed on movable mould (1), the mold core that floats is installed on cover half (2), be equipped with elastic component (6) between unsteady mold core and cover half (2), elastic component (6) can make fixed mold core (4) laminate with the terminal surface of unsteady mold core all the time under the compound die state.

2. The metal casting mold with floating core structure of claim 1, wherein: the floating mold core comprises a floating mold core body (51) and a fixed column (52), the first end of the fixed column (52) is connected with the center of the floating mold core body (51), and the second end of the fixed column (52) penetrates through the fixed mold (2) and then is connected with the outer side wall of the fixed mold (2).

3. The metal casting mold with floating core structure of claim 2, wherein: the fixed die is characterized in that an elastic piece placing groove (21) is formed in the fixed die (2) to install the elastic piece (6), the elastic piece (6) is a spring, the spring is sleeved on the fixed column (52), and two ends of the spring are respectively abutted to the end face of the floating die core body (51) and the end face of the elastic piece placing groove (21).

4. The metal casting mold with floating core structure of claim 3, wherein: in a free state, the length of the end part of the spring extending out of the elastic piece placing groove (21) is 3 mm.

5. The metal casting mold with floating core structure of claim 2, wherein: the end face, close to the fixed mold core (4), of the floating mold core body (51) is provided with an opening (511), a through hole (521) is formed in the fixed column (52), the opening (511) is communicated with the through hole (521) to form a central exhaust hole, the end face, close to the floating mold core, of the fixed mold core (4) is provided with a plurality of exhaust grooves (41), two ends of each exhaust groove (41) are respectively communicated with the center and the edge of the end face of the fixed mold core (4), and in a mold closing state, each exhaust groove (41) is communicated with the central exhaust hole to form an exhaust channel.

6. The metal casting mold with floating core structure of claim 5, wherein: the width of the exhaust groove (41) is 3-5 mm, and the depth is 0.1-0.2 mm.

7. The metal casting mold with floating core structure of claim 2, wherein: the fixed column (52) is a bolt, a screw rod of the bolt is in threaded connection with the floating mold core body (51), and the head of the bolt is abutted against the outer side wall of the fixed mold (2).