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    • 2. 发明授权
    • Method of forming a foamed article having a simulated wood grained
surface
    • 形成具有模拟木纹表面的发泡制品的方法
    • US3993721A
    • 1976-11-23
    • US557024
    • 1975-03-10
    • Shigenari SodaMotoshige HayashiShigetoshi Tanaka
    • Shigenari SodaMotoshige HayashiShigetoshi Tanaka
    • B32B5/32B29B7/00B29C44/22B29C44/46B29C47/00B29C47/20B29C47/30B29C47/90C08J9/00B29D7/02B29D27/00B29F3/08
    • B29C44/468B29C44/22Y10S264/14
    • An improved process for preparing foamed articles of thermoplastic resin having a hard, mar-resistant surface that is flat and smooth and resembles natural wood, and an extrusion die therefor. In the process a softened thermoplastic is extruded through apertures of the extrusion die of the invention which is a fiered die having a resin discharge plate having a peripheral recessing portion and a protruding interior portion which are formed on the resin discharge plate by one or more step-ups. Each of the peripheral and interior portions of the resin discharge plate is provided with a plurality of apertures, the aperture density of the peripheral portion being greater than that of the interior portion. A longitudinally extending cooling frame is mounted adjacent the resin discharge plate and extends in the direction of extrusion to at least the forward face of the interior portion of the plate. The cooling frame together with the interior portion of the resin discharge plate form a restrictive contact zone into which foamable resin members from the recessing portion are extruded. These members are thereafter coalesced with resin members extruded from the interior portion of the plate.The process is particularly suitable for preparing simulated wood articles.
    • 一种制备热塑性树脂的发泡制品的改进方法,其具有平坦光滑且类似于天然木材的坚硬耐磨损表面,以及用于其的挤出模头。 在该过程中,软化的热塑性塑料通过本发明的挤出模头的孔挤出,该挤出模具是具有树脂排出板的加热模具,该树脂排出板具有通过一个或多个步骤形成在树脂排出板上的周边凹陷部分和突出内部部分 -UPS。 树脂排出板的每个周边部分和内部部分设置有多个孔,周边部分的孔径密度大于内部部分的孔径密度。 纵向延伸的冷却框架安装在树脂排出板附近并沿着挤压方向延伸到至少板的内部的前表面。 冷却框架与树脂排出板的内部一起形成限制性接触区域,来自凹部的发泡性树脂构件被挤出到该限制接触区域中。 然后,这些构件与从板的内部部分挤出的树脂构件结合。