熔模铸造铜花管离心浇注工艺的研究

李爱宗

doi:10.15980/j.tzzz.2017.07.016

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熔模铸造铜花管离心浇注工艺的研究
Application of Centrifugal Pressurizing Technology in Investment Casting Decorated Brass Tube
2017年37卷第7期页码：750-751
纸质出版日期： 2017 ，
DOI： 10.15980/j.tzzz.2017.07.016

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[1]李爱宗.熔模铸造铜花管离心浇注工艺的研究[J].特种铸造及有色合金,2017,37(07):750-751.

Li Aizong. Application of Centrifugal Pressurizing Technology in Investment Casting Decorated Brass Tube[J]. Special Casting & Nonferrous Alloys, 2017,37(7):750-751.
[1]李爱宗.熔模铸造铜花管离心浇注工艺的研究[J].特种铸造及有色合金,2017,37(07):750-751. DOI： 10.15980/j.tzzz.2017.07.016.

Li Aizong. Application of Centrifugal Pressurizing Technology in Investment Casting Decorated Brass Tube[J]. Special Casting & Nonferrous Alloys, 2017,37(7):750-751. DOI： 10.15980/j.tzzz.2017.07.016.

摘要

建筑装饰用黄铜花管管壁较薄

外表面布满凸起花纹。采用普通熔模铸造工艺生产时

由于铜液流速慢

且发气量大

会产生大量气孔、缩孔等缺陷。而采用离心加压浇注工艺

由于离心力对合金液起到强力"推动"作用

促使合金液快速良好地充型和补缩

达到了减少或避免缩孔的效果;同时

由于合金液对型腔内气体产生了强力推动和挤压作用

而且气体本身也受到离心力

所以在离心力场中

型腔内的气体也更容易及时排出

从而大大减少了气孔缺陷。

Abstract

Decorated brass tube with a thin-walled thickness and many concave decorative veins on its outer surface is very difficult to produce by using common investment casting.Because of the low speed flow of molten brass and high gas evolution

great many shrinkage cavity and gas hole can be generated in the brass tube.By centrifugal pressurizing technology

as a result of centrifugal force strongly driving liquid copper to promote it filling and feeding rapidly

shrinkage porosities in the brass tube can be eliminated or decreased.Meanwhile

liquid copper can strongly drive and squeeze gas in the cavity accompanied with centrifugal force effects.So the gas in the cavity can be exhausted more easily to greatly reduce gas hole in the brass tube.