CN217018476U

CN217018476U - Local cooling structure of metal mold casting mould

Info

Publication number: CN217018476U
Application number: CN202220687664.XU
Authority: CN
Inventors: 龚大军; 王欢欢
Original assignee: XIANGYANG HANGLI ELECTROMECHANICAL TECHNOLOGY DEVELOPMENT CO LTD
Current assignee: XIANGYANG HANGLI ELECTROMECHANICAL TECHNOLOGY DEVELOPMENT CO LTD
Priority date: 2022-03-28
Filing date: 2022-03-28
Publication date: 2022-07-22
Anticipated expiration: 2032-03-28

Abstract

A metal mold casting mould local cooling structure is characterized in that a step hole is formed in a metal mould at the thicker part of a casting mould cavity, an insert used for heat dissipation is fixedly mounted in the step hole, the insert is in a step shape matched with the step hole, and comprises an insert mounting flange matched with a large hole of the step hole and a small step part connected to the upper end of the insert mounting flange and matched with a small hole of the step hole; the insert cavity surface of the insert is flush with the cavity surface of the metal mold, a plurality of V-shaped exhaust grooves are distributed on the insert cavity surface, U-shaped grooves which are distributed side by side are formed in the outer side surface of the insert, radiating fins are formed between every two adjacent U-shaped grooves, and the outer side surface of the insert is opposite to the insert cavity surface. The heat of the thick and large part of the casting is timely dissipated through the insert before the molten metal is filled, so that the purposes of leading the heat out of the metal mold and ensuring the compact structure of the thick and large part of the casting are achieved, and the casting mold has the advantages of simple structure, convenience in processing, simplicity and convenience in maintenance and good heat dissipation effect.

Description

Local cooling structure of metal mold casting mould

Technical Field

The utility model relates to a local cooling structure of a metal mold casting die.

Background

In the metal mold casting, the temperature field distribution of the casting is determined to be inconsistent due to the different thicknesses of the casting shape structures, the temperature field of the thick part of the casting is higher than that of the thin wall part of the casting, in order to reduce the temperature field of the thick part of the casting, cooling water is generally introduced into a drilled hole on a metal mold, but the peripheral mold temperature field is greatly influenced after the cooling water is introduced, so that the bad phenomena of cold shut, insufficient pouring and the like are easy to occur, even the defect of looseness is caused, the forming outline of the casting is damaged by the conditions, and the qualified casting is difficult to be produced.

Disclosure of Invention

The utility model aims to solve the defects of the prior art, thereby providing a local cooling structure of a metal mold casting die, improving the quality of castings and further improving the qualification rate of the castings.

A metal mold casting die local cooling structure is characterized in that a step hole is formed in a metal die at the thick part of a casting die cavity, an insert for heat dissipation is fixedly mounted in the step hole, the insert is in a step shape matched with the step hole, and comprises an insert mounting flange matched with a large hole of the step hole and a small step part connected to the upper end of the insert mounting flange and matched with a small hole of the step hole; the insert cavity surface of the insert is flush with the cavity surface of the metal mold, a plurality of V-shaped exhaust grooves are distributed on the insert cavity surface, U-shaped grooves which are uniformly distributed side by side are formed in the outer side surface of the insert, radiating fins are formed between every two adjacent U-shaped grooves, and the outer side surface of the insert is opposite to the insert cavity surface.

The small step part and the insert mounting flange are both of a circular truncated cone shape or a square truncated cone shape.

The cross section area of the small step part is not less than that of the thicker part of the mold cavity.

The mounting flange of the insert is provided with a mounting hole, the metal die is provided with a mounting screw hole corresponding to the mounting hole, and the insert and the metal die are fixedly connected through the fastening screw passing through the corresponding mounting hole and the mounting screw hole.

And the upper end surface of the flange of the insert mounting flange is matched and positioned with the step surface of the step hole.

The V-shaped exhaust grooves are arranged in a staggered mode to form a cross reticulate pattern structure.

The included angle of the opening of the cross section of the V-shaped exhaust groove is 60 degrees, and the longitudinal depth a of the V-shaped exhaust groove is 0.3 mm-0.5 mm.

The section of the radiating fin is of a U-shaped structure.

The depth of the U-shaped groove is at least half of the thickness of the insert.

The insert is made of red copper.

The utility model reduces the temperature field of the metal mold at the thick and large part of the casting, and has the advantages of simple structure, convenient processing, simple and convenient maintenance, easy assembly and good exhaust and heat dissipation effects.

According to the utility model, red copper with a large heat conductivity coefficient is embedded in the position of the thick part of the casting corresponding to the mold to increase the heat conduction and heat dissipation of the position, the heat dissipation of the red copper insert is increased by processing the U-shaped groove on the back surface (the contact surface of the cavity faces the vertical surface) of the red copper insert, and the reticulated V-shaped exhaust groove is milled on the contact surface of the cavity of the insert and is used for exhausting the thick part of the casting, so that the quality of the thick part of the casting is ensured.

The utility model not only solves the problems of accelerating the heat conduction of the thick and big part of the casting, promoting the rapid solidification of the thick and big part (a heat node area) and preventing the thick and big part of the casting from loosening, but also solves the exhaust problem that the exhaust hole cannot be formed due to the insert structure, leads out the hot air of the thick and big part of the casting and avoids the occurrence of defective products of the casting.

Drawings

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

FIG. 2 is a view in the direction A of FIG. 1;

FIG. 3 is an enlarged view of section I of FIG. 1;

in the figure: 1. an insert; 2. mounting an insert; 3. mounting holes; 4. a U-shaped groove; 5. a heat sink; 6. the upper end face of the flange 7 and a metal mold; 8. a cavity surface; 9. a V-shaped exhaust groove; 10. an insert cavity surface; 11. installing a threaded hole; 12. and (5) fastening the screw.

Detailed Description

In fig. 1 and 2, a die cavity is formed on the closed opposite surfaces of the upper and lower metal grinding tools 7, a stepped hole is formed in one of the metal dies 7 at the thick part of the die cavity, and an insert 1 for heat dissipation is fixedly mounted in the stepped hole. The insert 1 is step-shaped, the insert 1 comprises an insert mounting flange 2 with a mounting hole 3 and a small step part connected to the upper end of the insert mounting flange 2, the size of the small step part is smaller than that of the insert mounting flange 2, the insert mounting flange 2 is matched with the step hole in a punching mode and can be in a round table or square table shape, the small step part is matched with the small hole of the step hole, and the cross section area of the small step part is not smaller than that of the thicker part of the die cavity. U-shaped grooves 4 are formed in the outer side faces of the inserts, and radiating fins 5 are formed between every two adjacent U-shaped grooves 4, so that the radiating area is increased, and the radiating efficiency is improved; the upper end surface of the flange of the insert mounting flange 2 has a positioning function and is matched and positioned with the step surface of the step hole. An insert cavity surface 10 of the insert 1 is flush with a cavity surface 8 of the metal mold 7, and the insert cavity surface 10 is provided with a plurality of V-shaped exhaust grooves 9; the outer side surface of the insert 1 is opposite to the insert cavity surface 10. The metal mold 7 is provided with mounting screw holes 11 corresponding to the mounting holes 3, and fastening screws penetrate through the corresponding mounting holes 3 and the mounting screw holes 11 to fixedly connect the insert 1 with the metal mold 7. The insert 1 is made of red copper.

The upper cavity surface 10 of the insert forms part of a metal casting cavity, and in the metal liquid filling process, the metal mold can quickly dissipate heat through the U-shaped groove of the red copper insert and the heat dissipation fins 5 and can also discharge gas in the thick and large cavity through the V-shaped exhaust groove 9. Insert mounting flange 2's effect lies in that this insert structure can be conveniently rolled over from the metal casting and taken off, clearance, assembly, plays limiting displacement simultaneously. The U-shaped groove at the lower end of the insert 1 can rapidly lead out the heat of the metal mold with the thick and large part of the casting.

In fig. 2, a plurality of V-shaped air discharge grooves 9 are arranged in a staggered manner to form a cross-shaped cross-hatched structure.

In fig. 3, when designing the depth a of the V-shaped exhaust groove 9, it is necessary to ensure that the gas can be exhausted through the V-shaped cross section of the exhaust groove 9, and the molten metal can be prevented from invading into the V-shaped cross section of the longitudinal exhaust groove 9, in this embodiment, the depth a of the exhaust groove 9 is 0.3-0.5 mm, and the opening included angle of the V-shaped cross section of the exhaust groove 7 is 60 °.

During assembly, the structure is arranged in a metal mold 7, the insert mounting flange 2 and the metal mold 7 form limit, and the upper cavity surface 10 of the insert 1 is flush with the cavity surface 8 of the metal mold. The working principle of the utility model is that the heat and air gathered at the thick and large part of the casting are radiated and exhausted by the U-shaped groove and the V-shaped exhaust groove 9 of the insert 1 during the mold filling process of the metal liquid in the cavity of the metal mold 7 to control the temperature field of the mold at the thick and large part of the metal mold 7 and ensure the heat balance of the mold at the thick and large part of the casting.

Claims

1. The utility model provides a local cooling structure of metal mold casting mould which characterized in that: a step hole is formed in a metal die (7) at the thick part of a die cavity, an insert (1) for heat dissipation is fixedly mounted in the step hole, the insert (1) is in a step shape matched with the step hole, and the insert (1) comprises an insert mounting flange (2) matched with a large hole of the step hole and a small step part connected to the upper end of the insert mounting flange (2) and matched with a small hole of the step hole; the insert cavity surface (10) of the insert (1) is flush with the cavity surface (8) of the metal mold (7), a plurality of V-shaped exhaust grooves (9) are distributed on the insert cavity surface (10), U-shaped grooves (4) which are distributed side by side are formed in the outer side surface of the insert (1), radiating fins (5) are formed between every two adjacent U-shaped grooves (4), and the outer side surface of the insert (1) is opposite to the insert cavity surface (10).

2. The structure of locally cooling a metal mold casting mold according to claim 1, wherein: the small step part and the insert mounting flange (2) are both in a circular truncated cone shape or a square truncated cone shape.

3. The structure of locally cooling a metal mold casting die according to claim 1 or 2, wherein: the cross section area of the small step part is not less than that of the thicker part of the mold cavity.

4. The metal mold casting mold localized cooling structure as claimed in claim 1 or 2, wherein: the mounting structure is characterized in that the mounting hole (3) is formed in the insert mounting flange (2), the mounting screw hole (11) corresponding to the mounting hole (3) is formed in the metal die (7), and the insert (1) is fixedly connected with the metal die (7) through the corresponding mounting hole (3) and the mounting screw hole (11) by the fastening screw.

5. The structure of locally cooling a metal mold casting die as set forth in claim 4, wherein: and the upper end surface (6) of the insert mounting flange (2) is matched and positioned with the step surface of the step hole.

6. The structure of locally cooling a metal mold casting die as set forth in claim 1, wherein: the V-shaped exhaust grooves (9) are arranged in a staggered mode to form a cross reticulate pattern structure.

7. The structure of locally cooling a metal mold casting die according to claim 1 or 6, wherein: the included angle of the opening of the cross section of the V-shaped exhaust groove (9) is 60 degrees, and the longitudinal depth a of the V-shaped exhaust groove (9) is 0.3-0.5 mm.

8. The structure of locally cooling a metal mold casting mold according to claim 1, wherein: the section of the radiating fin (5) is of a U-shaped structure.

9. The structure of locally cooling a metal mold casting mold according to claim 1, wherein: the depth of the U-shaped groove (4) is at least half of the thickness of the insert (1).

10. The structure of locally cooling a metal mold casting mold according to claim 1, wherein: the insert (1) is made of red copper.