CN218310800U - Cooling mechanism for precision investment casting of thin-wall products - Google Patents

Abstract

The utility model relates to a precision casting field discloses a thin wall product cooling body for investment casting, including the mould shell, the mould shell has a plurality of kinks, be equipped with the recess on the kink, be equipped with detachable thickened piece in the recess. The utility model discloses a set up the recess on the kink on the mould shell, can reduce the thickness of mould shell, be provided with the thickening piece in the recess simultaneously, the setting of thickening piece can make the mould shell keep at certain thickness, ensures the support intensity of foundry goods in-process. In the cooling step after the foundry goods is accomplished, can dismantle the thickened part, and then reduce the local thickness of mould shell for the cooling rate of work piece in this department, because this position heat dissipation is fast, the work piece solidification rate is fast, can effectively prevent the technology heat festival that this position formed, avoids appearing shrinkage cavity, shrinkage porosity class defect.

Description

Cooling mechanism for precision investment casting of thin-wall products

Technical Field

The utility model relates to a precision casting field, concretely relates to thin wall product cooling body for investment precision casting.

Background

For thin-wall investment precision castings with complex structures, the thin-wall castings are thin in wall thickness, so that riser feeding distance is very limited during casting, particularly products with complex structures often have process thermal junctions formed due to the structures, such as products shown in fig. 1, and the thermal junctions (arrow parts) are difficult to be provided with risers for feeding, so that the castings have local shrinkage porosity defects which are difficult to avoid in the production process.

Disclosure of Invention

An object of the utility model is to provide a thin wall product cooling body for investment precision casting solves the local shrinkage porosity class defect problem that exists that current special foundry goods product is difficult to avoid in process of production.

In order to realize the purpose of the utility model, the utility model adopts the technical proposal that: the utility model provides a thin wall product cooling body for investment casting, includes the mould shell, the mould shell has a plurality of kinks, be equipped with the recess on the kink, be equipped with detachable thickening piece in the recess.

Preferably, the thickening piece is a gummed paper tape, and the gummed paper tape is adhered in the groove.

Preferably, the mould body is coated with multiple layers of refractory material.

Preferably, the mold shell comprises a shell, one side of the shell is arc-shaped, a plurality of pipe orifices are arranged on the arc-shaped side face of the shell, and the concave regions between two adjacent pipe orifices form bending portions.

Preferably, the number of said nozzles is four.

Preferably, a die holder is arranged on the other side of the shell.

The beneficial effects of the utility model are concentrated and are embodied in:

the utility model discloses a set up the recess on the kink on the mould shell, can reduce the thickness of mould shell, be provided with the thickening piece in the recess simultaneously, the setting of thickening piece can make the mould shell keep at certain thickness, ensures the support intensity of foundry goods in-process. In the cooling step after the foundry goods is accomplished, can dismantle the thickened part, and then reduce the local thickness of mould shell for the cooling rate of work piece in this department, because this position heat dissipation is fast, the work piece solidification rate is fast, can effectively prevent the technology heat festival that this position formed, avoids appearing shrinkage cavity, shrinkage porosity class defect.

Drawings

FIG. 1 is a schematic diagram of a process heat node formed in a prior art work piece casting configuration;

FIG. 2 is a schematic view of the overall structure of the mold shell of the present invention;

illustration of the drawings: 1. a bending section; 2. a groove; 3. a thickening member; 4. a housing; 5. a pipe orifice; 6. and (4) die holders.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 2, a cooling mechanism for investment precision casting of a thin-walled product includes a mold shell, in this embodiment, the mold shell mainly includes a shell 4, nozzles 5 and a mold base 6, one side of the shell 4 is arc-shaped, a plurality of nozzles 5 are connected to an arc-shaped side surface of one side of the shell 4, the mold shell has a plurality of bending portions 1, that is, a concave region between two connected nozzles 5 forms the bending portion 1, in this embodiment, the number of the nozzles 5 is preferably four, the number of the nozzles 5 is correspondingly set according to the structure of an actual workpiece product, meanwhile, a groove 2 is formed on the bending portion 1, the setting of the groove 2 can reduce the thickness of the shell 4 at the bending portion 1, and meanwhile, a detachable thickened part 3 is arranged in the groove 2, the setting of the thickened part 3 increases the thickness of the shell 4, which is equivalent to cover the groove 2, so as to ensure that the mold shell has normal support strength; after liquid is cast in the die shell, the thickened part 3 is taken out, the thickness of the shell 4 at the position is relatively thin, the heat dissipation speed is high, the workpiece at the position is cooled and solidified preferentially, the process thermal node formed at the position can be effectively prevented, and the defects of shrinkage cavity and shrinkage porosity are avoided; the yield of foundry goods is improved, simple structure, practicality are strong.

Furthermore, the thickening piece 3 is an adhesive tape, and the adhesive tape is adhered in the groove 2; the gummed paper tape plays the effect of support before the casting, because high temperature can make the gummed paper tape melt during the casting, and then exposes recess 2 for the heat dissipation of kink 1. In this embodiment, the thickened part 3 may also be a hard structure that cannot be melted, and after casting, the thickened part 3 is removed from the bent part 1; before casting, the thickened part 3 is placed in the groove 2 of the bending part 1.

Further, the die body is coated by multiple layers of refractory materials; the groove 2 can be formed manually after the refractory material is sprayed; or the thickened part 3 can be placed at the bent part 1, and then multiple layers of refractory materials are sprayed, so that the groove 2 is formed.

It should be noted that, for simplicity of description, the above-mentioned embodiments of the method are described as a series of acts, but those skilled in the art should understand that the present application is not limited by the described order of acts, as some steps may be performed in other orders or simultaneously according to the present application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and elements referred to are not necessarily required in this application.

Claims (6)

1. The utility model provides a thin wall product cooling body for investment casting which characterized in that: the die comprises a die shell, wherein the die shell is provided with a plurality of bending parts (1), grooves (2) are formed in the bending parts (1), and detachable thickening pieces (3) are arranged in the grooves (2).

2. The cooling mechanism for investment precision casting of thin-walled products of claim 1, wherein: the thickening piece (3) is an adhesive tape, and the adhesive tape is bonded in the groove (2).

3. The cooling mechanism for investment casting of thin-walled products of claim 1, wherein: the die body is formed by coating multiple layers of refractory materials.

4. The cooling mechanism for investment casting of thin-walled products according to any one of claims 1 to 3, wherein: the die shell comprises a shell (4), one side of the shell (4) is arc-shaped, a plurality of pipe orifices (5) are arranged on the arc-shaped side face of the shell (4), and the concave areas between every two adjacent pipe orifices (5) form bending parts (1).

5. The cooling mechanism for investment casting of thin-walled products of claim 4, wherein: the number of the pipe orifices (5) is four.

6. The cooling mechanism for investment casting of thin-walled products of claim 4, wherein: and a die holder (6) is arranged on the other side of the shell (4).

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