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Ultra-large type evanescent mould precision-casting shell manufacturing tool and shell manufacturing process thereof

A lost foam and super-large technology, applied in the field of investment casting, can solve the problems of castings that cannot be flipped flexibly, immediate sand hanging, mold shell deformation, etc.

Active Publication Date: 2014-08-13
安徽应流铸业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned shell making process has the following problems: 1. Since the blades of the impeller and guide vane are relatively thin, the mold shell will easily be deformed due to uneven force during the shell making process; 2. The outline size and volume of the casting are large, such as Using the traditional paint dipping process, the buoyancy of the paint during the paint dipping process (the density of the paint is 2.8kg / L, the density of the lost foam is about 0.04kg / L) is 1400kg, and it is impossible to operate at all; 3. After dipping the paint, it needs Immediately hang the sand. In order to ensure that all parts of the lost foam are hung with sand, the sand must be hung while turning the module. Such a huge casting cannot be turned flexibly, and it is impossible to ensure that the slurry and sand on the module will not fall off after turning over.

Method used

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  • Ultra-large type evanescent mould precision-casting shell manufacturing tool and shell manufacturing process thereof
  • Ultra-large type evanescent mould precision-casting shell manufacturing tool and shell manufacturing process thereof
  • Ultra-large type evanescent mould precision-casting shell manufacturing tool and shell manufacturing process thereof

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Embodiment Construction

[0022] Such as figure 1 and figure 2 As shown, the ultra-large lost foam investment casting tooling of the present invention includes a first spoke structure 1 and a second spoke structure 2 . The first spoke structure 1 and the second spoke structure 2 are installed on the left and right parts of the main shaft 3 . The first spoke structure 1 comprises a hexagonal first frame 9 . Six first connecting plates 10 are welded in the first frame 9 . One end of each first connecting plate 10 is located at the center of the first frame 9 and welded together. The other end of each first connecting plate 10 is vertically welded to each side plate of the first frame 9 respectively. A first circular plate 11 is connected to the right side of the side plate connecting portion of each first connecting plate 1 and the first frame 9 . The second spoke structure 2 comprises a hexagonal second frame 12 . Six second connecting plates 13 are welded in the second frame 12, and one end of e...

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Abstract

The invention relates to an ultra-large type evanescent mould precision-casting shell manufacturing tool and a shell manufacturing process thereof, belonging to the technical field of investment casting. The ultra-large type evanescent mould precision-casting shell manufacturing tool comprises a first wheel spoke structure and a second wheel spoke structure which are arranged on a main shaft, one end of the main shaft is connected with a power mechanism, the main shaft is provided with bearings between the power mechanism and the first wheel spoke structure and on the right end part of the second wheel spoke structure, the two bearings are arranged on two bearing seats, and the two bearing seats are fixed on a chassis. The shell manufacturing process comprises the following steps of: when a shell is manufactured, installing an evanescent mould on the main shaft, adhering the small ends of a plurality of connected lug bosses on a pouring channel and a feed head of the evanescent mould and an evanescent mould body, and adhering the large ends to the inner sides of the first wheel spoke structure and the second wheel spoke structure; rotating the main shaft, spraying paint on the surface of the evanescent mould by adopting flow coating mode, and then scattering sand; after the evanescent mould is dried, spraying the paint and scattering the sand again till the number of mould shell layers is reached, and then cutting off the connected lug bosses; taking down the evanescent mould and the shell from the ultra-large type evanescent mould precision-casting shell manufacturing tool, and then roasting to obtain the mould shell. The mould shell has the advantages of difficult deformation, smooth paint immersion process, stable quality of a produced product, labor conservation and work efficiency increase.

Description

technical field [0001] The invention relates to the technical field of investment casting, in particular to a super-large lost foam precision casting shell-making tooling and a shell-making process. Background technique [0002] For a long time, an important factor hindering the production of large castings by lost foam precision casting is the inability to obtain a qualified and stable mold shell. For this reason, many experts have designed various manipulators, but processing with manipulators is not only expensive, difficult to operate, but also poor in applicability, and the quality of the mold shell cannot be guaranteed at all. [0003] At present, the company adopts the lost foam process to produce the first-stage impeller and guide vane, and the weight of the casting blank is 920kg and 2200kg respectively. The traditional shell-making process is to put the lost foam of the impeller or guide vane in the paint tank, manually rotate the lost foam to soak the surface of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/04
Inventor 林欣杜应流张传书张年玉戴勇胡存友张金波
Owner 安徽应流铸业有限公司
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