消除压铸铝脚轮支架气孔缺陷的措施  

Improvement Measures of Gas Porosity in Aluminum Die Casting for Caster Arm

作　　者：周志军 

机构地区：[1]恩比尔(厦门)机械制造有限公司

出　　处：《特种铸造及有色合金》2015年第5期498-500,共3页Special Casting & Nonferrous Alloys

摘　　要：压铸铝脚轮支架由于其结构具有筋条多、壁较厚且不均匀的特点,易产生气孔、缩松等缺陷。通过分析脚轮支架结构,设计合理的浇注系统使铸件利于排气和补缩,在生产中掌握好铝液熔炼工艺要点,保证精炼质量。采用慢压射压铸工艺,找准增压转换点,同时在模具深腔处镶拼的芯子上增加减压筋和排气槽,可以有效地降低铸件气孔不良率,提高铸件质量。Gas porosity is one of the biggest problems in die casting.Caster arm aluminum casting easily generate gas porosity due to its wall thickness and multi-ribs.Through analysis of the product struc-ture,reasonable gating system for exhaust and feeding was designed.Aluminum alloy melting was con-trolled strictly in the production to ensure the quality of refining.Slow shot die casting technology was adopted with choosing exactly pressure conversion point.Decompression reinforcement and exhausting groove were set on the core of mold deep cavity,reducing effectively gas porosity rate in casting and im-proving the quality of the caster arm.

关 键 词：铝压铸 气孔缺陷 浇注系统 慢压射 

分 类 号：TG245[金属学及工艺—铸造]