product news/產品新聞
introduced a heavy lubricant or grease in an ill-advised at- tempt to seal the gap. Tis was constantly being pulled into the valve and was often a reason for its failure. Te amount of downtime was uncommonly high. Just a few years ago, if the average diecaster invested in
a vacuum system, the downtime often offset profit. It was unaffordable unless the requirements of his product were so stringent that they couldn’t be satisfied without vacuum. Today, almost any product can be profitably made with a
vacuum-assisted diecasting system. A valve is available that is stronger, has fewer moving parts and requires minimal maintenance. Tis much improved valve is now working very profitably, while supported by a thermally controlled shot sleeve and plunger tip combination that create a secure seal with a minimal amount of a special benign lubricant.
Chill Vents A properly designed copper chill vent with improved
thermal conductivity can increase quality and reduce scrap due to porosity. No additional water cooing is required. Also 20,000 to 40,000 shots can be expected before maintenance is required. A problem that is shared by most diecasters— the unplanned downtime that occurs when casting must be discontinued before the scheduled production run—has been eliminated. Chill vents supplied to Castool by InterGuss have an innovative insert design that provides high thermal conductivity, high wear resistance and high temperature resis- tance that allows a large venting profile, and at the same time guarantees solidification of the aluminum or magnesium. Whatever vacuum method is employed, if it works well,
improved quality and reduced scrap can be guaranteed. Vacuum assisted diecasting is essential to any diecaster who wants to eliminate porosity and wants to make larger, thinner, more complicated parts with less pressure.
Elkem and Sinojit Sign a Technical Co-operation Agreement Elkem Foundry Products signs a new technical co-opera-
tion agreement with Sinojit, the largest wind energy casting foundry globally. In 2012, the first technical co-operation agreement was
signed after many years of a close working relationship between Elkem and Sinojit During the course of these agreements, both companies
have grown in size and competency and have risen to meet new challenges in large section cast- ing production, such as low tempera- ture impact properties and shrinkage. Te close co-operation has also
generated metallurgical solutions for new alloys such as Solution Strengthen Ferritic Ductile Iron which is starting to become an industry standard for the windmill industry, making both Elkem and Sinojit the leaders in the production technology of these alloys in large section castings.
年签署。
在协议执行过程中，双方规模和竞争力都得到提升， 同时也都面临着大型型材铸造生产方面的新挑战，如低 温冲击性和收缩性等。 密切合作也促成了新型 合金治炼方案的产生，如已 开始成为风车工业行业标准 的铁素体球铁强化方案，双 方也因此成为这些大型型材 铸件用合金生产技术的领先 企业。
Elkem 与 Sinojit 签订技术合作协议 Elkem 铸造产品部与全球最大风能设备铸造商 Sino- jit 签订了一项新技术合作协议。
经过双方多年密切合作，首份技术合作协议于 2012
年，如果一家普通压铸制造商投资真空系统，其故障停机 成本也会将其利润抵消掉，除非产品要求极高以致不得不 采用真空铸造法，否则制造商不会采用。 到了今天，几乎所有产品采用真空铸造都有利可图， 原因在于真空阀性能提高、活动件减少且维护要求降至 最低。
目前，通过与确保良好密封性的温控压射缸和冲头组 合配合使用，再加上少量专用良性润滑剂，性能得到大 力改善的真空阀带来的利益相当客观。
冷却排气道
设计合理且热导性得到改善的铜质冷却排气道可提高 产品质量并降低因孔隙导致的报废率，而且无需另采用 水冷。维护到期之前预期可实现 20,000 至 40,000 次 压射。之前大部分压铸制造商面临的问题，即按计划 生产前因铸造过程中断而意意外停机也迎刃而解。由 InterGuss 供应给 Castool 的冷却排气道有一项创新性 嵌入式设计，它不仅提供大面积排气所需的高热导性、 耐磨性和耐温性，同时还能确保铝或镁的凝固。 品质改善
无论采用何种真空铸造法，只要其运行良好，就可改 善产品质量并降低报废率。
真空铸造法是任何想要消除孔隙、……以及想要制造 更大、更薄、更复杂铸件的压铸制造商所需求的根本解 决办法。
December 2015
FOUNDRY-PLANET.COM | MODERN CASTING | CHINA FOUNDRY ASSOCIATION | 87
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