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    • 2. 发明申请
    • ASSEMBLY FOR EXTRUDING PIPE
    • 挤出管组装
    • WO1981000823A1
    • 1981-04-02
    • PCT/NO1980000028
    • 1980-09-09
    • AS SONNICHSEN RORVALSEVERKETBOEN P
    • AS SONNICHSEN RORVALSEVERKET
    • B29D23/04
    • B29C47/24B29C47/0023B29C47/0033B29L2023/003
    • An assembly for extruding circular, cylindrical plastic piping, comprising an extruder (1, 2) with a feed screw (1) for transporting and softening the mass (9), and an annular nozzle with a central mandrel (4) which constitutes a circular, cylindrical, coaxial extension (4, 4') of the feed screw (1). The stationary outer mold section (3) of the annular nozzle is provided with one or more parallel, helical grooves (6) with the direction of the thread being in the direction of rotation for the screw (1) and mandrel (4). The mandrel (4) has a roughened surface or is provided with axial grooves or low ribs over at least a portion of its length. In addition alternate assembly for extruding circular, cylindrical plastic piping, comprising an extruder (1, 2) with a feed screw (2) for transporting and softening the mass, and an annular nozzle with a central mandrel which constitutes a circular cylindrical, coaxial extension (4, 4') of the feed screw (2), the rotating mandrel (4) is provided with helical grooves (14) on its outside surface. Lubrication is provided on the sliding surface, and the stationary outer mold section of the annular nozzle is smoothly cylindrical.
    • 一种用于挤出圆形圆柱形塑料管道的组件,包括具有用于输送和软化质量块(9)的进料螺杆(1)的挤出机(1,2)和具有构成圆形的中心心轴(4)的环形喷嘴 ,进给螺杆(1)的圆柱形同轴延伸部(4,4')。 环形喷嘴的固定外模具部分(3)设置有一个或多个平行的螺旋槽(6),螺纹的方向沿着螺杆(1)和心轴(4)的旋转方向。 心轴(4)具有粗糙表面或在其长度的至少一部分上设置有轴向槽或低肋。 另外用于挤出圆形圆柱形塑料管道的替代组件包括具有用于输送和软化物料的进料螺杆(2)的挤出机(1,2)和具有中心心轴的环形喷嘴,所述中心心轴构成圆柱形同轴延伸部 (4)的进给螺杆(4,4')上,旋转心轴(4)在其外表面上设有螺旋槽(14)。 在滑动面上设置润滑,环形喷嘴的固定外模部分平滑地圆柱形。
    • 3. 发明授权
    • COEXTRUSION DIE
    • EP0046789B1
    • 1984-11-28
    • EP81900658.6
    • 1981-02-27
    • RASMUSSEN, Ole-Bendt
    • RASMUSSEN, Ole-BendtJENSEN, Borge
    • B29D7/04B29D23/04B29F3/04
    • B29C47/065B29C47/0023B29C47/0026B29C47/009B29C47/20B29C47/268B29C47/56B29C2791/007
    • A coextrusion die for the extrusion of plastics materials in the shape of a tubular film comprising supply means (2) for separately supplying at least two plastics materials to said die, a distribution channel system connected to each supply means, each distribution channel system comprising at least two arched channels (24, 25, 26) provided in different axial planes, the ends of each arched channel (24, 25) being connected to the middle portion of the following arched channel (25, 26) and the distribution channel systems being located at different distances from the centre axis of the die, collecting chambers (18-20, 33-35) communicating with said distribution channel systems and an annular extrusion slot (5, 36) communicating with the collecting chambers (18-20, 33-35).
    • 一种用于塑料材料挤出成形为管状薄膜的共挤出模具,其包括用于将至少两种塑料材料分别供应到所述模具的供应装置(2),连接到每个供应装置的分配通道系统,每个分配通道系统包括在 至少两个设置在不同轴向平面中的拱形通道(24,25,26),每个拱形通道(24,25)的端部连接到随后的拱形通道(25,26)的中间部分,并且分配通道系统 (18-20,33-35)与所述分配通道系统连通并且环形挤出狭槽(5,36)与所述收集室(18-20,33)连通,所述收集室(18-20,33-35)与所述收集室 -35)。
    • 5. 发明公开
    • A method and an arrangement for the manufacture of a material web of foamed thermoplastics
    • 用于薄膜生产的发泡的热塑性塑料的方法和装置。
    • EP0008689A1
    • 1980-03-19
    • EP79102841.8
    • 1979-08-07
    • AB TETRA PAK
    • Nilsson, LennartLjungberg, Per-AllanAndrén, Sven-Olof
    • B29D23/04B29D27/00
    • B29C44/507B29L2023/00
    • The manufacture of material webs of foamed plastics generally takes place by extrusion of the material in tubular form, whereupon the material whilst it is still in soft condition is calibrated, that is to say expanded by means of a mandrel, so that the desired tube diameter and thus the desired material thickness is obtained. The material tube is then cooled and cut up axially and laid flat to a web. This manufacturing procedure gives a final product with uneven surface, since the pores and craters which the material surface presents will be enlarged when the tube is expanded. Moreover, the cooling as well as the contact pressure of the material against the mandrel will be varying, which further increases the uneveness of the surface and gives the material an uneven quality. A more uniform material surface and a more homogeneous material tube is obtained in accordance with the invention, in that the material tube (3) after extrusion is pressed, by means of compressed air introduced into the tube, against an outer calibration element (5) and is cooled at the same time, so that its temperature drops below the softening temperature of the material. In this way the cooling as well as the contact pressure can be controlled, and by imparting moreover a profiled surface to the outer calibrating element, a rational manufacture of a material web of foamed thermoplastics of good quality and uniform surface is made possible.
    • 8. 发明公开
    • AN ORIENTED, SEMI-CRYSTALLINE POLYMER PRODUCT AND METHOD AND APPARATUS FOR PRODUCING SUCH PRODUCT.
    • 拉伸,半结晶聚合物产品和生产这种产品的方法和装置。
    • EP0016817A4
    • 1983-02-09
    • EP79901170
    • 1980-04-08
    • BETHLEHEM STEEL CORP
    • AUSTEN ALFRED RHUMPHRIES DARRAL V
    • B29D23/00B29C47/00B29C47/20B29C55/26B29D7/01F16L9/12B32B5/16B29B1/14B29D7/16B29D7/22B29D23/04B29F3/06B32B27/06
    • F16L9/12B29C47/0004B29C47/0023
    • A thick-walled, seamless, rigid non-porous conduit (Y) having a substantially uniform wall thikkness which is not less than about 0.5 percent of the outside diameter consisting essentially of an oriented crystalline thermoplastic polymer characterized by a structure comprised of radially compressed discrete, platelet-like spherulitic crystalline aggregates (A!) and having a combination of good ultimate tensile strength and low temperature tensile impact strength. The conduit is fabricated by solid state hydrostatic extrusion of a substantially non-oriented semi-crystalline thermoplastic polymer preform (X) which may contain up to about60 weight percent filler. The polymer is substantially simultaneously elongated in both circumferential and axial directions by compressive forces with the circumferential elongation being at least 100 percent. The apparatus used to produce the product is a hydrostatic extrusion press which includes an annular orifice in which the thermoplastic polymer is elongated substantially simultaneously circumferentially and axially with the circumferential elongation being at least 100 percent. Means for maintaining the rigidity of tooling and the hydrostatic extrusion fluid pressure while providing a film of the fluid on the preform for lubricity are provided in the apparatus. A sheet (F) substantially uniform in thickness and having substantially the microstructure and properties of the conduit and excellent drawability may be made from the conduit by slitting and heat deformation. Articles of manufacture may be made by solid state deformation processing of the conduit or the sheet, such as vacuum drawing.