• 挤出棒材的隔热和制动装置
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挤出棒材的隔热和制动装置

  • 12/06/2018 09:37:48

隔热垫圈:在机头与冷却定型模之间要放置隔热垫圈,也称为绝热隔板,使主要使机头与冷却定型模之间以形成明显的冷、热界面。隔热垫圈最好选用氟塑料,如PTFE等。PTFE能耐高温,热导率小,并有非薪性,有自润滑性和弹性,不会影响棒材的表面质量;其缺点是硬度不高,有蠕变现象,…

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