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Precision casting method for multi-cavity structural part

A technology of precision casting and structural parts, which is applied in the direction of casting molding equipment, casting molds, and cores. It can solve the problems of easy fracture of cores, breakouts, and difficult coating of slender cavities, so as to achieve high casting precision and high production efficiency. Simple operation, effective in solving slag inclusion phenomenon

Active Publication Date: 2014-02-19
CHINA HANGFA SOUTH IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a precision casting method for multi-cavity structural parts, so as to solve the technical problems that the core is easy to break during the wax mold pressing process, and the coating of the slender cavity is difficult and easy to leak

Method used

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  • Precision casting method for multi-cavity structural part
  • Precision casting method for multi-cavity structural part
  • Precision casting method for multi-cavity structural part

Examples

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Embodiment 1

[0045] Embodiment 1 of the present invention: a casing has thirty-one straight through holes with varying cross-sections from small to large, and the molding method of the present invention is used: first, prepare figure 2 , 3 ceramic core 1 as shown, and then pressed as Figure 4 , 5 The wax mold 2 shown in the figure, and then insert the ceramic core 1 into the 31 through holes of the wax mold 2, seal the edges of the through holes, and then carry out moulding, shell making, smelting and pouring, post-processing and core removal to obtain Investment cast monolithic piece with thirty-one through holes.

Embodiment 2

[0046] Embodiment 2 of the present invention: there are eight curved cavities in a week in a certain overall precision casting structure, adopt the method of the present invention: first prepare as Figure 6 ceramic core 1, and pressed as Figure 6 Cover wax mold 3, and then press the main body wax mold 2, the main body wax mold 2 brings out the left side, right side and bottom surface of the curved cavity, put the cover wax mold 3 together with the ceramic core 1 The corresponding position of the main body wax mold 2 is sealed with adhesive wax on the left side and the left side of the cover plate, and the right side and the right side of the cover plate are sealed, and then the moulding, shell making, melting and pouring, post-processing and The core is removed to obtain an investment casting monolith with several curved cavities.

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Abstract

The invention discloses a precision casting method for a multi-cavity structural part. The precision casting method for the multi-cavity structural part comprises the following steps: ceramic cores are prepared; multi-cavity structural part wax molds are designed and manufactured, and a plurality of cavities are formed in a manner that steel cores are placed inside each wax mold; the multi-cavity wax molds are obtained through pressing; the pre-prepared ceramic cores are placed inside the cavities of the wax molds, and gaps between the ceramic cores and the wax molds and at the openings of the cavities are sealed through adhesive wax; the wax molds with the ceramic cores are combined into a tree group in a certain manner; the outer surface of the tree group is repeatedly subjected to sizing coating, stuccoing and drying, so as to form a housing which covers the whole outer surfaces of the wax molds and has at least one reserved opening for pouring and / or discharging; the housing is sintered, and the melted wax molds are discharged from the opening, so as to form a hollow housing with the opening; the temperature of the housing is kept, and an alloy material for casting the multi-cavity structural part is melted and poured into the hollow housing until the hollow housing is full of the alloy material; the housing and the ceramic cores are removed after cooling; the multi-cavity structural part is formed.

Description

technical field [0001] The invention relates to the technical field of precision casting, in particular to a precision casting method for an integral part with a plurality of identical mold cavities. Background technique [0002] There are many integral parts with multiple identical cavities in the aviation field, and these parts are mostly formed by precision casting, and because the parts in the aviation field have high precision requirements, once there is a problem in any link in the casting process, the parts will be scrapped . [0003] At present, there are two traditional investment casting molding methods for multi-cavity structural parts: [0004] One is to use a ceramic core, put the ceramic core into a wax mold making mold, and press the wax mold; paint and dewax to form a shell, then melt and pour, clean the shell, and remove the ceramic core to obtain a structural part. In order to avoid uneven hole wall thickness caused by eccentricity in the molding process ...

Claims

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Application Information

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IPC IPC(8): B22C9/04B22C7/02B22C9/22
Inventor 郝新雷四雄贺峥嵘闫彬唐双双龙宪翼周坚蔡瑜
Owner CHINA HANGFA SOUTH IND CO LTD
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