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1). Te main tasks of die spraying are: • Application of separating agent. • Lubrication of the moving die half. • Removal of impurities. • Die cooling. An important basic condition for optimal spraying is that the die surface is sprayed evenly and gently. Te separating agent application influences the die lifetime. Te high cooling rate of the tool surface during spraying means a high strain on the die material with regard to temperature fatigue strength. Te high thermal tension can cause cracks in the die. A spraying tool can be built very quickly using the modular spray tool technology from Wollin GmbH, Lorch, Germany. Te modular system allows for almost any adaptation to the die contour. An advantage of such a “mask spraying tool” is that no tubes have to be attached. Tese often cause interruptions as they can be bent easily. A spraying tool should be designed with nozzles that


spray vertically to the die surface so that the complete die can be sprayed from one spray position, thus avoiding time-consuming travelling (Fig. 2) Well-known manufacturers have developed water-free oil-based die separating agents in order to avoid tempera- ture instabilities within the die. Tese mean improvements in quality, environmental protection and production. Te new generation of water-free separating agents have


high adhesive properties, which can be reliably applied to the die using the newly developed WOLLIN spraying nozzles. Te Wollin company’s comprehensive application technology already allows an even more efficient spraying result.


• 润滑压铸机动型。 • 清除杂质。 • 冷却模具。


最佳喷涂的重要基本条件是在模具表面进行均匀且 仔细地喷涂。脱模剂喷涂能够影响模具的使用寿命。如 果喷涂时模具表面的冷却率高,将引起模具材料的高应 变,从而影响模具的温度疲劳强度。高的热应力会导致 模具出现裂纹。 德国洛池Wollin GmbH公司的模块化喷涂工具技术 能够实现快速喷涂。模块化系统几乎可适应任何模具形 状。这种“模块喷涂工具”的优点是不需要连接管子。 由于管子容易弯曲,经常会导致喷涂中断。 喷涂工具应当设计带有喷嘴,垂直于模具表面进行喷 涂,以便可从一个喷涂位置喷涂整个模具,避免耗时的 移动(图2)。


知名制造商已经开发出油基无水模具脱模剂,以避免 模具内出现温度不稳定的情况。这意味着质量、环保和 生产力水平的提升。


新一代无水脱模剂粘合性能高,使用新开发的WOL- LIN喷嘴能够可靠地应用于模具中。Wollin公司的综合 喷涂技术已经取得更加高效的喷涂效果。 微喷的优点包括:


• 喷涂时间短。 • 脱模剂使用量减少。


Fig. 1: The characteristics of the spray stream are primarily responsible for good separating agent application.


图1:喷涂流的特点是主要用于适当的脱模剂应用。 80 | FOUNDRY-PLANET.COM | MODERN CASTING | CHINA FOUNDRY ASSOCIATION December 2015


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