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Improvements in investment casting

A technology of investment casting and wax mold, which is applied in the technical improvement field of investment casting, and can solve the problems such as high-standard finishing of casting parts that cannot be used.

Inactive Publication Date: 2007-07-11
PROCESS TECH EURO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, such resin molds cannot be used for high-spec finishing of cast parts (such as aircraft engine blades) that do not require further polishing treatments, because the type of production resin mold treatments do not result in a smooth finish to the casting

Method used

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  • Improvements in investment casting
  • Improvements in investment casting

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Embodiment Construction

[0015] The figure shows a runner 10 with a pouring cup 14 filled with a wax pattern material 11 . A pattern 12 of the part to be molded is attached to the sprue by the treatment of wax, glue or a heat-sealing knife. It is known that the sprue 10, the pouring cup 11 and all the patterns 12 are formed of wax pattern material. However, according to the present invention, the sprue 10 has a higher percentage of microwave susceptor content than the original wax pattern 12 , and the pouring cup 11 has a higher content of microwave susceptor content than the sprue 10 . The mold 12 is formed from virgin wax, and the runner 10 and pouring cup 11 are formed from a recycled wax emulsion having a known fixed percentage of microwave susceptors.

[0016] In the first layer of sand grain coating outside the tree model, there is a certain proportion of microwave susceptors, which can be water, carbon, graphite or their related mixtures, and can also be other suitable susceptible substances. ...

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Abstract

In an investment casting procedure using microwave energy as the heat source virgin wax models (12) are attached to a spree (10) of a wax-type pattern material incorporating a susceptor, the spree (10) having a pour cup (14) also of a wax-type pattern material, the pour cup material having a higher percentage of the susceptor than the material of the spree. In use the pour cup (14) will melt first and the spree (10) second, unblocking the path of the virgin wax so that its expansion will not crack ceramic with which it has been coated.

Description

technical field [0001] This invention relates to improvements in investment casting, and more particularly to improvements in the art of investment casting which utilizes heat provided by microwave energy to melt wax patterns and sinter ceramic molds. Background technique [0002] Investment casting first requires making a fusible model of a fusible material that is equivalent to the part being cast, usually by injecting wax into a reverse engineered mold (reverse engineered mold), or making it on a wax model material. The material of the model can be natural wax or artificial wax, polystyrene, a mixture of various waxes and other thermoplastic materials, etc., sometimes non-exclusively including some fillers such as fatty acids and plasticizers. In this specification and the appended claims, whenever the term "wax pattern material" is used, it is defined as all meltable materials suitable for lost wax casting including the above. After a certain number of similar wax molds...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04B22C7/02
CPCB22C9/043B22C7/02B22C9/04B22D23/00
Inventor 安东尼·威尔弗雷德·博尔顿
Owner PROCESS TECH EURO
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