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    • 1. 发明申请
    • IMPROVEMENTS IN OR RELATING TO METHODS AND APPARATUS FOR THE CONTINUOUS FORMATION OF AN EXTRUDED PRODUCT
    • 关于连续形成挤压产品的方法和装置的改进或相关
    • WO1990008024A1
    • 1990-07-26
    • PCT/GB1990000025
    • 1990-01-09
    • NATIONAL RESEARCH DEVELOPMENT CORPORATIONALLEN, Peter, StewartBEVIS, Michael, John
    • NATIONAL RESEARCH DEVELOPMENT CORPORATION
    • B29C47/00
    • B29C47/0004B29C47/0023B29C47/20B29C47/362B29C47/368B29C47/385B29C47/54B29C47/86B29C47/862B29C47/864B29K2105/06
    • Method and apparatus for the continuous formation of an extruded product from material containing fibres, molecules of other constituents susceptible to alignment or other ordered orientation. While the extrudate is still molten and moving through the die (5), in the direction of the extrusion axis (11), it is subjected to pulsating displacements in a direction transverse relative to that axis. These displacements give rise to a shearing action within the material, resulting in a degree of transverse orientation of the constituents. This orientation may be "locked in" to the extruded product when the melt solidifies (40), so improving the transverse strength of that product, and/or may correct an unwanted orientation (from 112, Fig. 16) that existed in the melt upstream of the point where the pulsating displacements were applied. The displacements may be applied by the synchronized operation of pistons (20-27), operating in chambers (17) which open into the die cavity (18) at separated locations all lying in the same transverse plane. The extrusion of products of rectangular, tubular and other sections is described, as are various methods (8a, 8b, 9, 10, 37) of applying forced cooling to the die to accelerate the solidification of the molten product.
    • 用于从含有纤维的材料连续形成挤出产品的方法和设备,易于对准或其它有序取向的其他成分的分子。 当挤出物仍然熔融并通过模具(5)沿着挤出轴线(11)的方向移动时,其在相对于该轴线的横向方向上受到脉动位移。 这些位移在材料内产生剪切作用,导致组分的一定程度的横向取向。 当熔体固化(40)时,该取向可以“锁定”到挤出的产品中,从而改善该产品的横向强度和/或可以校正存在于熔体中的不希望的取向(图16中的112) 应用脉动位移点的上游。 位移可以通过活塞(20-27)的同步操作来施加,其操作在腔室(17)中,所述腔室(17)在分开的位置处都位于同一横向平面内。 还描述了矩形,管状和其它部分的产品的挤出,以及向模具施加强制冷却以加速熔融产品固化的各种方法(8a,8b,9,10,37)。