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    • 13. 发明申请
    • METHOD AND APPARATUS FOR EXTRUDING FOAMED ARTICLES
    • 用于挤压发泡制品的方法和装置
    • WO00015405A1
    • 2000-03-23
    • PCT/NL1999/000552
    • 1999-09-07
    • B29C44/46B29C44/50
    • B29C44/468B29C44/507
    • During extrusion of foamed articles made from thermoplastic, a molten mass comprising heated, pressurized plastic which has been mixed with a foaming agent is pressed firstly through an orifice (4) which shapes the article and then through the nucleator (6). Then, the article is cooled. This results in a very fine microfoam structure. Particularly good results are obtained if the molten material is compressed for a short time immediately after it leaves the nucleator, during which compression it is ensured that no shear forces, or only slight shear forces, are generated in the molten mass.
    • 在由热塑性塑料制成的发泡制品的挤出过程中,将与发泡剂混合的加热的加压塑料的熔融物质首先通过孔(4)压制,该孔(4)使制品成形,然后通过成核器(6)。 然后,将物品冷却。 这导致非常精细的微泡结构。 如果熔融材料在离开成核剂之后立即压缩短时间,则获得特别好的结果,在此期间压缩确保在熔融物质中不产生剪切力或仅产生轻微的剪切力。