CN214161355U - Vacuum die-casting die with elastic deformation sealing structure of die closing surface - Google Patents

Abstract

The utility model discloses a vacuum die casting mold with a die-closing surface elastic deformation sealing structure, which comprises 1-2 spring steel metal ring pipes and a plurality of fixing rings of the spring steel metal ring pipes; one half of the spring steel metal ring pipe in the pipe diameter direction is arranged in a groove on a movable die sleeve plate or a fixed die sleeve plate, the shape and the pipe diameter of the groove correspond to those of the spring steel metal ring pipe, and the other half of the spring steel metal ring pipe is fixed by a fixed ring and keeps a bulge with the diameter of 1-2 mm on the surface of the fixed ring; the contact surface of the fixed ring and the movable die sleeve plate or the spring steel metal ring pipe and the fixed die sleeve plate is a closed annular surface of the fixed die and the movable die. The utility model has simple structure, stability, reliability and convenient operation; the sealing effect is good, the specially designed double-layer sealing structure has better sealing effect, and the quality and the yield of die castings are effectively improved. Is easy to be popularized and applied in the industry and has wide market application prospect.

Description

Vacuum die-casting die with elastic deformation sealing structure of die closing surface

Technical Field

The utility model belongs to the technical field of pressure casting, more specifically say, relate to a vacuum die casting die with compound die face elastic 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 a vacuum die-casting die with an elastic deformation sealing structure of a die clamping surface, which has a simple structure, effectively improves the service performance of a casting die and has good sealing stability of the die clamping surface.

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

the utility model provides a vacuum die casting die with compound die face elastic deformation seal structure, includes cover half part and movable mould part, its characterized in that: the elastic deformation sealing structure of the die-closing surface of the vacuum die-casting die comprises 1-2 spring steel metal ring pipes and a plurality of fixing rings of the spring steel metal ring pipes; the spring steel metal ring pipe is arranged in a groove on a movable die sleeve plate or a fixed die sleeve plate along one half of the pipe diameter direction, the shape and the pipe diameter of the groove correspond to those of the spring steel metal ring pipe, and the other half of the spring steel metal ring pipe is fixed by a plurality of fixing rings matched with the spring steel metal ring pipe and keeps a bulge of 1-2 mm on the surface of each fixing ring; the contact surface of the fixed ring and the movable die sleeve plate or the spring steel metal ring pipe and the fixed die sleeve plate is a closed annular surface of the fixed die and the movable die.

Preferably, the spring steel metal ring pipe is formed by bending a straight spring steel metal pipe with the outer diameter of 8-20 mm and the wall thickness of 0.7-2.0 mm into a ring-shaped piece, and then two ports are aligned accurately and welded into a whole.

Preferably, the material of the spring steel metal ring pipe (4) is 65Mn or 55Si2Mn or 60Si2 Mn.

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

1. the utility model discloses an add spring steel metal ring pipe between the matched mould face of cover half and movable mould, spring steel metal ring pipe can produce the bullet shape and warp and flatten under big pressure effect, laminate with relative die face well to the effect sealed to the mould die cavity has been played.

2. The utility model discloses sealed effectual, double-deck seal structure seals the effect better, and long service life reaches the requirement of vacuum die-casting, has improved the quality and the yield of die casting effectively.

3. The utility model discloses simple structure, reliable and stable, convenient operation, it is easy to implement, and manufacturing cost is lower, easily popularizes and applies in industry, and market perspective is extensive.

Drawings

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

Fig. 2 is a partially enlarged schematic view of region I in fig. 1.

Fig. 3 is a partially enlarged schematic view of two spring steel metal collar portions in a double-layer sealing structure according to embodiment 3 of the present invention.

In the figure: the device comprises a guide block 1, a moving die insert 2, a spring steel metal ring pipe fixing ring 3, a spring steel metal ring pipe fixing outer ring 3A, a fixing ring inner ring 3B, a fixing ring middle ring 3C, a spring steel metal ring pipe 4, a moving die sleeve plate 5, a part unloading push plate guide pillar 6, a part unloading push plate guide sleeve 7, a part unloading push rod fixing plate 8, a part unloading push plate 9, a nut 10, a gasket 11, a part unloading oil cylinder 12, a hydraulic rod 13, a part unloading push plate limit nail 14, a moving die seat plate 15, a moving die cushion plate 16, a supporting block 17, a part unloading push rod 18, a fixed die guide sleeve 19, a guide pillar 20, a fixed die cushion plate 21, a spring steel ring pipe fixing inner ring 3B, a fixed die sleeve plate 22, a fixed die insert 23, a sprue bush 24, a sprue bush 25 and a sprue bush 26.

Detailed Description

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

Example 1

Fig. 1 is the embodiment 1 of the present invention, a schematic structural diagram of a vacuum die casting mold with a sealing structure of elastic deformation of a mold clamping surface, a front view, a section view between a fixed mold base plate and a movable mold base plate. The sealing structure for elastic deformation of the die-closing surface of the vacuum die-casting die is a single-layer sealing structure and comprises a fixing ring 3, namely a fixing ring inner ring 3B and a fixing ring outer ring 3A, which are formed by 1 spring steel metal ring pipe 4 and 2 spring steel metal ring pipes 4. As shown in fig. 1, a vacuum die casting mold with a mold clamping surface elastic deformation sealing structure comprises a fixed mold part and a movable mold part, the movable mold part is installed on the inner side of a movable mold base plate 15, and the movable mold part comprises: the die comprises a movable die insert 2, a guide sleeve 19, a movable die sleeve plate 5, a part unloading push rod 18 (also called a thimble), a supporting block 17, a part unloading push rod fixing plate 8, a part unloading push plate 9, a movable die base plate 15, a part unloading push plate limit nail 14, a part unloading push plate guide sleeve 7, a part unloading push plate guide pillar 6 and a movable die base plate 16. The movable die base plate 16 is supported between the movable die base plate 15 and the movable die sleeve plate 5, the movable die insert 2 is embedded in the movable die sleeve plate 5, the unloading push plate guide sleeve 7 and the unloading push plate guide post 6 guide the motion of the unloading push plate 9, and the unloading push plate limit nail 14 limits the unloading push plate 9. The unloading oil cylinder 12 is positioned in the middle of the outer side of the movable die base plate 15. The guide post 20 and the guide sleeve 19 are a guide mechanism for clamping the fixed die and the movable die. The fixed mold part comprises: the fixed die base plate 21 and the fixed die insert 23, and the fixed die base plate 21 is supported between the fixed die base plate 26 and the fixed die sleeve plate 22. The spring steel metal ring pipe 4 can be made of 65Mn or 55Si2Mn or 60Si2Mn with the outer diameter of 8-20 mm and the wall thickness of 0.7-2.0 mm, two ports of the spring steel metal ring pipe are accurately aligned after the spring steel metal ring pipe is bent into a ring-shaped piece, and then the spring steel metal ring pipe is formed by laser welding and grinding and polishing a joint part. Half of the spring steel metal ring pipe 4 along the pipe diameter direction is arranged in a groove of a movable mould sleeve plate 5, the groove corresponds to the shape and the pipe diameter of the spring steel metal ring pipe 4 and is suitable for being arranged, the other half of the spring steel metal ring pipe 4 is fixed on the surface of the movable mould sleeve plate 5 through a fixed outer ring 3A and a fixed inner ring 3B and screws are adopted to fix the fixed outer ring 3A and the fixed inner ring 3B of the spring steel metal ring pipe 4. Before die assembly, as shown in fig. 2, a spring steel metal ring pipe 4 protrudes out of the surfaces of a fixed outer ring 3A and a fixed inner ring 3B, and the height of the protrusion is 1-2 mm; when the die is closed, the spring steel metal ring pipe 4 can generate elastic deformation in the groove of the movable die sleeve plate 5 under the action of large pressure on the closed die surface of the fixed die and is pressed flat, and the spring steel metal ring pipe is well attached to the opposite die surface, so that the die cavity is sealed. The contact surfaces of the surface of the fixed die sleeve plate 22 and the fixed outer ring 3A and the fixed inner ring 3B of the spring steel metal ring pipe 4 are the joint surfaces of the fixed die and the movable die and are closed annular surfaces. The sprue 25, the sprue bush 24 and the flow guide block 1 are positioned at the lower part of the fixed die. Fig. 1 shows a nut 10, a washer 11 and a hydraulic rod 13.

Example 2

This embodiment has basically the same structure as embodiment 1, except that: the fixed outer ring 3A of the spring steel metal ring pipe 4 and the fixed inner ring 3B of the spring steel metal ring pipe fix the spring steel metal ring pipe 4 in the groove of the fixed die sleeve plate 22, and the fixed outer ring 3A of the spring steel metal ring pipe and the fixed inner ring 3B of the spring steel metal ring pipe are fixed on the surface of the fixed die sleeve plate 22 by screws. Before die assembly, the spring steel metal ring pipe 4 protrudes out of the surfaces of the fixed outer ring 3A and the fixed inner ring 3B of the spring steel metal ring pipe, and the protruding height is 1-2 mm; when the die is closed, under the action of large pressure on the closing surface of the movable die, the spring steel metal ring pipe 4 can generate elastic deformation in the groove of the fixed die sleeve plate 22 to be flattened and well attached to the opposite die surface, so that the die cavity is sealed. The contact surface of the movable mould sleeve plate 5 and the spring steel metal ring pipe fixing outer ring 3A and the spring steel metal ring pipe fixing inner ring 3B is the joint surface of the fixed mould and the movable mould and is a closed annular surface.

Example 3

This embodiment has substantially the same structure as embodiment 1 or 2, except that: as shown in fig. 3, the elastic deformation sealing structure of the die-clamping surface of the vacuum die-casting die is a double-layer sealing structure, and comprises 2 spring steel metal ring pipes 4, namely spring steel ring pipes 4A, 4B, and 3 fixing rings 3, namely fixing ring inner rings 3B, fixing ring middle rings 3C, and fixing ring outer rings 3A, of the spring steel metal ring pipes 4. The sealing effect is further improved through the double-layer sealing structure.

The above-mentioned embodiments are the preferred embodiments of the present invention, not limiting the scope of the present invention, so that the changes made according to the shape and principle of the present invention should be covered within the protection scope of the present invention.

Claims (3)

1. The utility model provides a vacuum die casting die with compound die face elastic deformation seal structure, includes cover half part and movable mould part, its characterized in that: the elastic deformation sealing structure of the die-closing surface of the vacuum die-casting die comprises 1-2 spring steel metal ring pipes (4) and a plurality of fixing rings (3) of the spring steel metal ring pipes (4); one half of the spring steel metal ring pipe (4) is arranged in a groove on a movable die sleeve plate (5) or a fixed die sleeve plate (22) along the pipe diameter direction, the shape and the pipe diameter of the groove correspond to those of the spring steel metal ring pipe (4), and the other half of the spring steel metal ring pipe is fixed by a plurality of fixing rings (3) matched with the spring steel metal ring pipe (4) and keeps 1-2 mm of bulges on the surface of the fixing rings (3); the contact surface of the fixed ring (3) and the movable die sleeve plate (5) or the spring steel metal ring pipe (4) and the fixed die sleeve plate (22) is the joint surface of the fixed die and the movable die and is a closed annular surface.

2. The vacuum die-casting mold with the elastic deformation sealing structure of the mold clamping surface as set forth in claim 1, wherein: the spring steel metal ring pipe (4) is formed by bending a straight spring steel metal pipe with the outer diameter of 8-20 mm and the wall thickness of 0.7-2.0 mm into a ring-shaped piece, and then two ports are accurately aligned and welded into a whole.

3. The vacuum die-casting mold with the elastically deformable sealing structure of the mold clamping surface as set forth in claim 1 or 2, wherein: the material of the spring steel metal ring pipe (4) is 65Mn or 55Si2Mn or 60Si2 Mn.

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