CN214161354U - Plastic deformation sealing structure for die-closing surface of vacuum die-casting die - Google Patents

Abstract

The utility model discloses a plastic deformation sealing structure of a die-closing surface of a vacuum die-casting die, which comprises a movable die part and a movable die base plate, wherein the movable die base plate is supported between a movable die base plate and a movable die sleeve plate; in the fixed die part, a fixed die base plate is supported between a fixed die base plate and a fixed die sleeve plate; the surface of the fixed die sleeve plate or the movable die sleeve plate is covered and fixed with a red copper material layer with the thickness of at least 2 mm; the contact surface of the red copper material layer and the movable mould sleeve plate or the fixed mould sleeve plate is the joint surface of the fixed mould and the movable mould and is a closed annular surface. The utility model discloses an add the red copper material layer between the die surface of cover half and movable mould, effectively improve the foundry goods and make mould performance. The red copper is shaped and deformed under the action of the die closing force, the red copper is well attached to the opposite die surface, the sealing effect on the die cavity is achieved, and even if hard particles exist on the die closing surface, the red copper can be pressed into a red copper material during die closing, and the sealing effect is not influenced. Thereby meeting the requirement of vacuum die casting and effectively improving the quality and yield of die castings.

Description

Plastic deformation sealing structure for die-closing surface of vacuum die-casting die

Technical Field

The utility model belongs to the technical field of pressure casting, more specifically say, relate to a vacuum die casting die matched surface plastic deformation seal structure that obviously improves mould performance is made to foundry goods.

Background

With the continuous development of die casting technology, higher requirements are put forward on the mechanical property, complex procedures and the appearance of a casting, in die casting, particularly large-sized die casting pieces, before the metal liquid is filled into a die cavity of a die, the inside of the die cavity is completely air, an injection head of the die casting machine quickly presses the metal liquid into the die cavity during die casting, the metal liquid is filled into the die cavity in a spraying mode, the air in the die cavity cannot be exhausted, and the air hole defect is easy to occur, so that the die cavity is pre-vacuumized and then filled, and the air hole defect of the die casting piece can be obviously reduced or eliminated. In order to ensure the sealing of a mold cavity, the joint surfaces of the mold need to be well jointed when the mold is closed, the joint surfaces of a fixed mold and a movable mold of a new mold are ground to be smooth, two surfaces can be well jointed when the mold is closed, and the sealing property is good; however, when the die is used for a long time, repeated die closing and opening can be performed, the die closing surfaces are gradually abraded to serious abrasion, so that the two die surfaces can not be well attached, the die cavity leaks air, the vacuum degree is reduced, the air hole defect can be formed, the quality and the yield of die castings are reduced, and the vacuum die-casting effect can not be achieved, so that the fact that the two die surfaces can be well attached during die closing is particularly important.

Disclosure of Invention

The invention aims to overcome the defects and shortcomings of the prior art and provide the plastic deformation sealing structure for the die closing surface of the vacuum die-casting die, which can simply and effectively improve the service performance of the die for casting and the sealing stability of the die closing surface.

The purpose of the utility model is realized through the following technical scheme:

the utility model provides a vacuum die casting die matched mould die surface plastic deformation seal structure, includes its characterized in that of cover half part and movable mould part: the movable mould part is installed in the inboard of movable mould bedplate, and the movable mould part includes: the movable mould backing plate, the movable mould backing plate supports between movable mould bedplate and movable mould lagging, and its cover half includes: the fixed die base plate is supported between the fixed die base plate and the fixed die sleeve plate; the surface of the fixed die sleeve plate or the movable die sleeve plate is covered and fixed with a red copper material layer, and the thickness of the red copper material layer is at least 2 mm; the contact surface of the red copper material layer and the movable die sleeve plate or the contact surface of the red copper material layer and the fixed die sleeve plate is a closed annular surface of the fixed die and the movable die.

Preferably, the thickness of the red copper material layer is 2-5 mm.

Preferably, the red copper material layer is a commercial red copper plate, the surface of the red copper material layer is subjected to roll extrusion and compression molding to form a mirror surface, and the mirror surface is fixed with the movable die sleeve plate or the fixed die sleeve plate by screws.

Preferably, the red copper material layer is formed by spraying and depositing a red copper material and is metallurgically combined with the movable die sleeve plate or the fixed die sleeve plate.

Compared with the prior art, the utility model have following advantage and beneficial effect:

1. the utility model discloses an add the red copper material layer between the die joint face of cover half and movable mould, red copper's yield strength is 60 ~ 70MPa, and die pressure reaches hundreds of tons to supreme thousand tons during die-casting, when there is the position of bellied unevenness on the surface, red copper plate will moulding deformation be flattened under big pressure effect, laminate with relative die face well to play sealed effect to the mould die cavity, solved the problem that mould die cavity leaks gas, vacuum descends among the prior art effectively.

2. Commercial copper plate can make its surface become the mirror surface through rolling the moulding processing of extrusion, and is sealed effectual, long service life.

3. When hard particles are on the die matching surface, the hard particles can be pressed into the red copper material during die matching, the sealing effect cannot be influenced, the requirement of vacuum die casting is met, and the quality and the yield of die casting pieces are effectively improved.

4. The utility model provides a simple structure effectively improves foundry goods and makes mould performance, reliable and stable, convenient operation, manufacturing cost is lower, easily in industry popularization and application, market perspective is extensive.

Drawings

Fig. 1 is a schematic view of a sealing structure for plastic deformation of a mold clamping surface of a vacuum die-casting mold according to embodiment 1 of the present invention.

In fig. 1: the die comprises a guide block 1, a moving die insert 2, a moving die sleeve plate 3, a part unloading push plate guide post 4, a part unloading push plate guide sleeve 5, a part unloading push rod fixing plate 6, a part unloading push plate 7, a nut 8, a washer 9, a part unloading oil cylinder 10, a hydraulic rod 11, a part unloading push plate limit nail 12, a moving die base plate 13, a moving die base plate 14, a support block 15, a part unloading push rod 16, a guide sleeve 17, a red copper material layer 18, a guide post 19, a fixed die base plate 20, a fixed die sleeve plate 21, a fixed die insert 22, a sprue sleeve 23, a sprue channel 24 and a fixed die base plate 25.

Detailed Description

The present invention will be further described with reference to the following specific embodiments and accompanying drawings.

Example 1

Fig. 1 is a schematic view of a sealing structure for plastic deformation of a mold clamping surface of a vacuum die-casting mold according to embodiment 1 of the present invention, which is in a cross-sectional view in a front view between a fixed mold base plate and a movable mold base plate. As shown in fig. 1, a plastic deformation sealing structure of a clamping surface of a vacuum die-casting mold comprises a fixed mold part and a movable mold part, wherein the movable mold part is installed on the inner side of a movable mold base plate 13, and the movable mold part comprises: the movable mould insert comprises a movable mould insert 2, a guide sleeve 17, a movable mould sleeve plate 3, an unloading push rod 16 (also called a thimble), a supporting block 15, an unloading push rod fixing plate 6, an unloading push plate 7, a movable mould base plate 13, an unloading push plate limit nail 12, an unloading push plate guide sleeve 5, an unloading push plate guide pillar 4 and a movable mould base plate 14, wherein the movable mould base plate 14 is supported between the movable mould base plate 13 and the movable mould sleeve plate 3, the movable mould insert 2 is embedded in the movable mould sleeve plate 3, the guide sleeve 17 and the unloading push plate guide pillar 4 guide the movement of the unloading push plate 7, and the unloading push plate limit nail 12 limits the unloading push plate 7. The unloading oil cylinder 10 is positioned in the middle of the outer side of the movable mold base plate 13. The guide post 19 and the guide sleeve 17 are a guide mechanism for clamping the fixed die and the movable die. The fixed mold part comprises: a fixed mold base plate 20, the fixed mold base plate 20 being supported between the fixed mold base plate 25 and the fixed mold sleeve plate 21; the fixed die sleeve plate 21 or the movable die sleeve plate 3 is covered on the surface and is fixed with a red copper material layer 18, the red copper material layer 18 is a commercial red copper plate with the thickness of 2-5 mm, the surface is subjected to roll extrusion and compression molding to form a mirror surface, and the mirror surface is fixed with the fixed die sleeve plate 21 through screws. The fixed die insert 22 is embedded in the fixed die sleeve plate 21 and the red copper plate, namely the red copper material layer 18. The contact surface of the red copper material layer 18 on the surface of the fixed die sleeve plate 21 and the movable die sleeve plate 3 is a closed annular surface of the fixed die and the movable die. The sprue 24, the sprue bush 23 and the flow guide block 1 are positioned at the lower part of the fixed die. Fig. 1 shows a nut 8, a washer 9 and a hydraulic rod 11.

Example 2

This embodiment has basically the same structure as embodiment 1, except that: the surface of the movable die sleeve plate 3 is covered with and fixed with a red copper material layer 18, the red copper material layer 18 is selected from commercial red copper plates with the thickness of 2-5 mm, the surface is subjected to rolling extrusion and shaping processing to form a mirror surface, and screws are adopted to be fixed with the movable die sleeve plate 3. The movable mould insert 2 is embedded in the movable mould sleeve plate 3 and the red copper plate, namely the red copper material layer 18. The contact surface of the red copper material layer 18 and the fixed die sleeve plate 21 on the surface of the movable die sleeve plate 3 is the joint surface of the fixed die and the movable die and is a closed annular surface.

Example 3

This embodiment has substantially the same structure as embodiment 1 or 2, except that: the red copper material layer 18 is formed by spraying and depositing red copper material and is metallurgically combined with the movable die sleeve plate 3 or the fixed die sleeve plate 21. And then the surface of the glass is processed to be a mirror surface by rolling, extruding and shaping.

Claims (4)

1. The utility model provides a vacuum die casting die matched mould die surface plastic deformation seal structure, includes cover half part and movable mould part, its characterized in that: the movable mould part is installed in the inboard of movable mould bedplate (13), and the movable mould part includes: movable mould backing plate (14), movable mould backing plate (14) support between movable mould bedplate (13) and movable mould lagging (3), and its cover half includes: the fixed die base plate (20), the fixed die base plate (20) is supported between the fixed die base plate (25) and the fixed die sleeve plate (21); the surface of the fixed die sleeve plate (21) or the movable die sleeve plate (3) is covered and fixed with a red copper material layer (18), and the thickness of the red copper material layer (18) is at least 2 mm; the contact surface of the red copper material layer (18) and the movable die sleeve plate (3) or the contact surface of the red copper material layer (18) and the fixed die sleeve plate (21) is the joint surface of the fixed die and the movable die and is a closed annular surface.

2. The die-closing surface plastic deformation sealing structure of the vacuum die-casting die as claimed in claim 1, wherein: the thickness of the red copper material layer (18) is 2-5 mm.

3. The die surface plastic deformation sealing structure of the vacuum die casting die as claimed in claim 1 or 2, wherein: the red copper material layer (18) is a commercial red copper plate, the surface of the red copper material layer is subjected to roll extrusion and compression molding to form a mirror surface, and the mirror surface is fixed with the movable die sleeve plate (3) or the fixed die sleeve plate (21) by screws.

4. The die surface plastic deformation sealing structure of the vacuum die casting die as claimed in claim 1 or 2, wherein: the red copper material layer (18) is formed by spraying and depositing red copper material and is metallurgically combined with the moving die sleeve plate (3) or the fixed die sleeve plate (21).

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