product news/產品新聞
haust system was coated and not run until the following day. Curing is required to allow the release coating to polymer- ize. 85% polymerization is required. Tis is achieved within 2 hours. Humidity and ventilation improve the hardening process (Figure 1). Production did not have to stop to clean the tooling. No
additional traditional release agent spray was required. On the cylinder head water jacket, the release coating lasted 1,527 cycles, and on the cylinder head exhaust system, it lasted 1,600 cycles. Te tests confirm the advantages to using a release coat- ing in highly stressed areas in coldbox core production as opposed to a traditional release agent. Te release coating is a dry system. Resin, sand and release agent sludge, most commonly referred to as resin wipe-off, do not build up. Tis system allows for a tight corebox, thereby reduc- ing flashing. Te release coating thickness is only limited by the requirements of dimensional accuracy. It allows for constant function of the core box because the vents and ejectors do not malfunction. Te core is not contaminated by the release agent, lowering the risk of casting defects. Production stops are avoided, leading to higher produc- tivity and higher output. Tere are no emissions of oil or solvent in production. It also protects the tooling against wear, lowering tool replacement costs. Traditional release agents need to be reapplied within 20 cycles. Te release coating lasts far longer into the 100 of cycles range before reapplication is needed. It allows for lower cost, higher output, and better quality. S. Clifford, ASK Chemicals LP, Cleveland, Ohio, USA; H. Rehse; ASK Chemicals GmbH, Hilden, Germany.
天才能运行。脱模剂的聚合要求硬化，需要85％的聚 合物。这一过程在2小时内完成。湿度和通风可改善 硬化工艺（图1）。
清理模具时不用停产，也不必再喷涂额外的脱模 剂。在气缸盖水套和气缸盖排气系统，脱模涂层可分 别持续使用1527个和1600个工作周期。 试验证实了与传统的脱模剂相比，新型脱模剂在冷 芯盒制芯生产中的高应力区域的优势。新型脱模涂层 是干法系统。树脂、砂和脱模剂沉积，通常被称为树 脂残留，不会产生堆积。
该系统可在结构紧凑的芯盒中使用，从而减少飞 边。脱模涂层的厚度仅受限于尺寸精度的要求。通风 孔和喷射孔不会发生障碍，因此，可保证芯盒的连续 稳定工作。砂芯不会被脱模剂污染，降低了产生铸造 缺陷的风险。避免了停产，从而提高了生产力和产 量。生产过程没有油或溶剂的排放。它还可以保护模 具防止磨损，从而降低模具的更换成本。传统的脱模 剂需要在20个周期内重新涂覆。新型脱模涂层的工作 时间更长，可达100个工作周期。它的成本更低，产 量更高，质量更好。
Cliffor
美国俄亥俄州克利夫兰，ASK Chemicals公司，S. d 德国希尔登，ASK Chemicals 公司H. R
ehse
Process Technologies Boosted with Big-Bag Handling 大袋货物提升搬运的技术
Processing procedures involving powdered, granulated or other free-flowing materials require regular, high volume product top-ups to maintain adequate production through- puts. Te specialized big-bag, air operated hoists manufac- tured by J D Neuhaus are suitable for operating with single or twin bag loads. Tese handling products also provide safe, speedy and accurate positioning, even where limited head- room conditions exist. Individual bag loads of 1,100 or 2,200kg can be accom-
modated, with precision handling facilities incorporated for discharge at storage sites or process line delivery chutes etc. Te hoist systems are also designed for reliable and safe operation within dust laden atmospheres, including areas at risk of explosion. Teir operating medium is compressed air (6 bar pressure), with additional spark protection also being available, ensuring explosion protection classifications according to Directive 94/9/EG (Equipment and Protec- tion Systems Intended for use in Potentially Explosive Areas [ATEX]). Te explosion potential of dust laden atmospheres can be high where handling powdered chemicals, but with more innocuous food based components or metallic pow-
进行研粉、粒化或其他流程性材料的加工作业， 需要稳定、大量的原材料供应，以保持充足的生产 物料的通过量。由J D Neuhaus公司生产的气动提升 机，可适用于单袋或双袋的大容量包装的提升作业。 即使在空间高度受限制的情况下，产品运输过程能确 保安全、快速和准确定位。 每袋承重1100或2200kg，配以精密的运输设 备，可把原料卸载在仓库或原料输送线料槽。提升系 统的设计能够在充满粉尘的大气环境下可靠且安全的 工作，包括有爆炸风险的区域。工作介质选用压缩空 气（6 bar），也可提供额外的防电火花保护，确保 防爆等级符合标准94/9/EG的要求（用于潜在易爆区 域[ATEX]内的设备和保护系统）。在含粉尘的大气 环境下搬运化学品粉末，爆炸的潜在危险性高，但是
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FOUNDRY-PLANET.COM | MODERN CASTING | CHINA FOUNDRY ASSOCIATION December 2015
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