CN213496335U

CN213496335U - Riser sleeve with exhaust function

Info

Publication number: CN213496335U
Application number: CN202022096897.6U
Authority: CN
Inventors: 陈呈祥; 吴俊俊; 段文恒; 田辉
Original assignee: CRRC Changzhou Auto Parts Co Ltd
Current assignee: CRRC Changzhou Auto Parts Co Ltd
Priority date: 2020-09-22
Filing date: 2020-09-22
Publication date: 2021-06-22
Anticipated expiration: 2030-09-22

Abstract

The utility model relates to a take exhaust function's riser bush belongs to the casting field. The feeder sleeve aims to solve the problems that the existing feeder sleeve has certain defects while feeding a casting, for example, the air hole defect of the casting can be caused because one type of feeder sleeve has no exhaust channel; the other type is a hole formed in the top of the riser bush for exhausting, but the modulus of the riser bush is reduced, and feeding efficiency is affected. The riser sleeve is provided with a riser sleeve top, a riser sleeve bottom and concave-convex matching bonding grooves; the top of the riser bush is connected with the bottom of the riser bush into a whole through a concave-convex matching bonding groove. The top of the riser sleeve made of 30-40 mesh silica sand or hollow floating beads can effectively compensate the shrinkage of the casting, solve the shrinkage porosity defect of the casting, simultaneously have better exhaust effect, prevent the casting from having air hole defect and improve the process yield of products.

Description

Riser sleeve with exhaust function

Technical Field

The utility model relates to a take exhaust function's riser bush belongs to the casting field.

Background

The riser bush is a supplementary part which is added above or on the side surface of the casting to avoid the defect of the casting, and has the function in a casting mould, a cavity of the riser bush is a cavity for storing liquid metal, and the metal is supplied when the casting is formed, so that the riser bush has the functions of preventing shrinkage cavity, shrinkage porosity, exhaust and slag collection. The existing riser sleeves have certain defects while feeding castings, for example, one type of riser sleeve has no exhaust passage, so that the castings have air hole defects; the other type is that a hole is formed in the top of the riser sleeve for exhausting, and simultaneously, the internal heat can be directly exhausted through the hole, so that the feeding time is shortened, the modulus of the riser sleeve is reduced, the feeding efficiency is influenced, and particularly when a casting with large feeding amount is required, the sufficient number of risers is required to meet the storage requirement of molten metal, the gas in the feeding process is required to be exhausted in time, and the internal heat cannot be exhausted quickly, so that the feeding effect is ensured.

With the development of the turbocharger industry, higher requirements are put on the porosity of the internal organization of the turbine shell of the core part in the turbocharger, namely the internal compactness and no shrinkage porosity of the turbine shell. With the improvement of the requirement on porosity, a riser is needed at the hot spot position of the turbine shell to compensate the shrinkage of the casting during solidification, particularly stainless steel products, the required feeding amount is larger, for example, for some heat-resistant steel turbine shells with special structures (the wall thickness of the product is less than or equal to 2.5mm, the wall thickness is not uniform, the position needing feeding is at the highest position, and the like), through a traditional method using a heat-insulating or heating riser, although the heat-insulating or heating riser can solve the shrinkage porosity problem of the casting, the gas generated during casting, filling and feeding cannot be effectively discharged, and finally the process yield of the casting cannot be ensured.

SUMMERY OF THE UTILITY MODEL

Problem and not enough to exist among the prior art, the utility model provides a take exhaust function's riser bush can satisfy traditional riser bush and carry out the demand of feeding to the foundry goods, fills the type and the feeding stage at the pouring simultaneously, can effectively get rid of gas in the die cavity, has guaranteed the feeding effect, has also reduced the defect that the gas pocket appears in the foundry goods, has improved the yield of foundry goods.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a take exhaust function's riser bush, includes riser bush top and riser bush bottom, and riser bush bottom is the tube-shape cavity structure that link up from top to bottom, and riser bush top is the tube-shape cavity structure of upper end confined, and the open end at riser bush top is continuous with the one end of riser bush bottom through unsmooth cooperation bonding groove.

Specifically, the bottom of the riser bush is a vertically through cylinder body with gradually changed pipe diameters, and the small-diameter end of the bottom of the riser bush is connected with the top of the riser bush.

Specifically, the concave-convex matching bonding groove is composed of a flange-shaped convex groove formed at the small-diameter end at the bottom of the riser bush and a groove formed at the inner side of the top opening end of the riser bush and matched with the convex groove at the bottom of the riser bush.

Specifically, the height of the bottom of the riser bush accounts for 2/3-1/2 of the height of the whole riser bush.

Specifically, the height of the top of the riser bush accounts for 1/3-1/2 of the height of the whole riser bush; a pressure reduction groove is arranged at the middle position of the top of the riser bush, which is positioned at the cavity side of the closed end; the cross section of the pressure reducing groove is triangular and transversely penetrates through the top of the riser bush, and the top of the riser bush is made of 30-40 meshes of silica sand or hollow floating beads.

Compared with the prior art, the beneficial effects of the utility model reside in that:

1. this riser bush sets up riser bush top, riser bush bottom, and both during operation connect integratively through unsmooth bonding groove, and the back of having used up can separately make things convenient for inside the clean riser bush, can use repeatedly, and the cost of manufacture is lower itself moreover to manufacturing cost has been reduced.

2. The top of the riser bush is set to be made of materials with good air permeability and heat preservation effect, so that gas generated in the pouring and filling process can be timely discharged, the defect of air holes in castings can be avoided, the heat in the cavity can not be rapidly discharged, the feeding time is prolonged, and the feeding effect is guaranteed.

Drawings

FIG. 1 is a front view of a riser sleeve with venting features;

FIG. 2 is a top view of the riser sleeve;

FIG. 3 is a cross-sectional view of the riser sleeve;

FIG. 4 is a bottom view of the riser sleeve;

FIG. 5 is a front view of the top of the riser sleeve;

figure 6 is a front view of the bottom of the riser sleeve.

In the figure: 1. the top of the riser bush; 2. the bottom of the riser bush; 3. concave-convex fitting bonding groove; 4. a pressure relief tank.

Detailed Description

The invention will be further elucidated with reference to the drawings in an embodiment of the invention.

Please refer to fig. 1-6, this embodiment discloses a riser bush with an exhaust function, which includes a riser bush top 1 and a riser bush bottom 2, wherein the riser bush bottom 2 is a cylindrical cavity structure which is through from top to bottom, the riser bush top 1 is a cylindrical cavity structure with a closed upper end, and an open end of the riser bush top 1 is connected with one end of the riser bush bottom 2 through a concave-convex matching adhesive groove 3. When in use, the utility model is connected into a whole, and can be disassembled after use, thereby being convenient for cleaning the inside.

Further, the bottom 2 of the riser bush is a cylinder body with gradually changed pipe diameters and communicated up and down, and the small-diameter end of the bottom 2 of the riser bush is connected with the top 1 of the riser bush. The position of the top 1 of the riser bush and the bottom 2 of the riser bush are formed.

Further, the concave-convex matching bonding groove 3 is composed of a flange-shaped convex groove formed at the small-diameter end of the bottom 2 of the riser bush and a groove formed at the inner side of the opening end of the top 1 of the riser bush and matched with the convex groove at the bottom of the riser bush. Realizes the formation of concave-convex matching bonding grooves.

Furthermore, the height of the bottom 2 of the riser bush accounts for 2/3-1/2 of the height of the whole riser bush; when the feeding device is used, the feeding device can be made into the riser sleeves with different functions by using heating materials or heat-insulating materials so as to improve the feeding efficiency according to different casting feeding requirements.

Furthermore, the height of the top 1 of the riser bush accounts for 1/3-1/2 of the height of the whole riser bush; a pressure reduction groove 4 is arranged at the middle position of the top 1 of the riser bush, which is positioned at the cavity side of the closed end; the section of the pressure reduction groove 4 is triangular, and the pressure reduction groove transversely penetrates through the top of the riser bush to play a role in reducing the pressure during molten metal filling when the riser bush works; the top 1 of the riser bush is made of 30-40 mesh silica sand or hollow floating beads, so that the riser bush has the function of exhausting.

The working principle is as follows: when this kind of take exhaust function's riser bush of in-service use, the molten metal of riser bush bottom cavity carries out the feeding to the foundry goods, and riser bush top has good gas permeability and certain heat insulating ability, can in time discharge the gas that the in-process produced of filling the mould and feeding, also can guarantee that the inside heat of die cavity can not discharge fast, prolongs feeding time, guarantees the feeding effect. Thereby improve the inside quality and the yield of turbine shell, traditional riser bush in addition can promote the technology yield of product.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. All equivalent changes and modifications made according to the content of the claims of the present invention fall within the technical scope of the present invention.

Claims

1. The utility model provides a take riser bush of exhausting function, includes riser bush top (1) and riser bush bottom (2), its characterized in that: the bottom (2) of the riser bush is of a cylindrical cavity structure which is communicated up and down, the top (1) of the riser bush is of a cylindrical cavity structure with a closed upper end, and the open end of the top (1) of the riser bush is connected with one end of the bottom (2) of the riser bush through a concave-convex matching bonding groove (3).

2. The riser sleeve with a venting function of claim 1, wherein: the bottom (2) of the riser bush is a vertically through cylinder body with gradually changed pipe diameter, and the small-diameter end of the bottom (2) of the riser bush is connected with the top (1) of the riser bush.

3. The riser sleeve with a venting function of claim 2, wherein: the concave-convex matching bonding groove (3) is composed of a flange-shaped convex groove formed at the small-diameter end of the bottom (2) of the riser bush and a groove formed at the inner side of the opening end of the top (1) of the riser bush and matched with the convex groove at the bottom of the riser bush.

4. The riser sleeve with a venting function of claim 1, wherein: the height of the bottom (2) of the riser bush accounts for 2/3-1/2 of the height of the whole riser bush.

5. The riser sleeve with a venting function of claim 1, wherein: the height of the top (1) of the riser bush accounts for 1/3-1/2 of the height of the whole riser bush; a pressure reduction groove (4) is arranged in the middle position of the top (1) of the riser bush, which is positioned at the cavity side of the closed end; the top (1) of the riser bush is made of 30-40 mesh silica sand or hollow floating beads.