New ceramic injection systems for hot chamber die casting of aluminium alloys

The quality of hot chamber die cast aluminium alloys can vary, due to differences of casting conditions, in particular the casting pressure. This is caused by the plunger tip galling during the casting process. To solve this problem, a new injection system is proposed using a flexible movable plunge...

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Bibliographic Details
Published in:International journal of cast metals research (Online) 2010-08, Vol.23 (4), p.246-249
Main Authors: Okayasu, M., Hitomi, M., Yamazaki, H.
Format: Article
Language:English
Subjects:
ALUMINIUM ALLOY
Aluminum base alloys
Chambers
Die casting
HOT CHAMBER DIE CASTING
INJECTION SYSTEM
Inserts
PLUNGER TIP
Plungers
Pressure casting
Shot
SHOT SLEEVE
Sleeves
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Description
Summary:The quality of hot chamber die cast aluminium alloys can vary, due to differences of casting conditions, in particular the casting pressure. This is caused by the plunger tip galling during the casting process. To solve this problem, a new injection system is proposed using a flexible movable plunger tip and an insert type shot sleeve. With this system, the plunger tip can be turned around and slid into the piston holder, which facilitates smooth insertion of the plunger into the shot sleeve. The proposed insert type sleeve can be made with a strong structure. Moreover, even if the sleeve is partially fractured, it can easily be replaced. With the proposed injection system, high quality hot chamber die cast components can be created. In addition, the maintenance cost of the injection system is dramatically reduced.
ISSN:1364-0461
1743-1336
DOI:10.1179/136404610X12682097603768