Method in manufacturing a heat insulated tube and a device in extruders
for manufacturing the tube
    1.
    发明授权
    Method in manufacturing a heat insulated tube and a device in extruders for manufacturing the tube 失效
    用于制造隔热管的方法和用于制造管的挤出机中的装置

    公开(公告)号:US4929409A

    公开(公告)日:1990-05-29

    申请号:US307196

    申请日:1989-02-03

    摘要: Method in manufacturing a heat insulated tube includes a tube (17) for conducting fluid and a sheath (12) enclosing said tube, a heat insulating material (15) being disposed between the fluid tube and the sheath. The sheath is being extruded in an angle extruder die (10) while the fluid tube and the heat insulating material enclosing said tube are being fed axially through the angle extruder die as the sheath is being extruded around the heat insulating material. Then the sheath (12) extruded from the angle extruder die is kept spaced from the heat insulating material (15) enclosing the fluid tube (17), over an initial length of the axial movement thereof up to chains of chill molds (13) for imparting to the sheath a corrugated shape by forming the sheath against the chains of chill molds under the influence of negative pressure. The invention also relates to a device in extruders having an angle extruder die (10) for the manufacture of the heat insulated tube. wherein a sleeve (20) is provided in the angle extruder die, said sleeve defining a passage for the heat insulating material (15) and the fluid tube (17) enclosed by said material, from the angle extruder die up to the chains of chill molds (13).

    摘要翻译: 制造隔热管的方法包括用于导电流体的管(17)和封闭所述管的护套(12),设置在流体管和护套之间的隔热材料(15)。 鞘被挤出在角度挤出机模具(10)中,同时围绕绝热材料挤压护套时,流体管和围绕所述管的绝热材料被轴向地供给通过角度挤出机模具。 然后从角挤出机模头挤出的护套(12)与封闭流体管(17)的绝热材料(15)保持在其轴向运动的初始长度上,直到冷却模具链(13),用于 通过在负压的影响下通过在冷却模具链上形成护套来赋予护套波纹形状。 本发明还涉及一种具有用于制造隔热管的角度挤出机模具(10)的挤出机中的装置。 其中套筒(20)设置在所述角度挤出机模具中,所述套筒限定用于隔热材料(15)和所述材料包围的流体管(17)的通道,从角度挤出机模头到冷却链 模具(13)。

    Method for relining underground pipelines
    2.
    发明授权
    Method for relining underground pipelines 失效
    地下管道改造方法

    公开(公告)号:US5469891A

    公开(公告)日:1995-11-28

    申请号:US170303

    申请日:1994-04-18

    摘要: The invention relates to a material wherein the main constituent is PVC for manufacturing pipes to be used for relining underground pipelines by the pipe in a folded condition being drawn into the pipeline and being engaged with the inside surface of the pipeline by temperature increase. By the addition of polymer thermoplastic elastomers which can be mixed with PVC the material has a glass transition temperature ranging from 45.degree. to 75.degree. C. and a ratio (Emod, T=20.degree. C.)/(Emod, T=75.degree. C.)>20. The invention also relates to a method for restoring underground pipes by relining such pipes with a pipe which has been folded after the extrusion.

    摘要翻译: PCT No.PCT / SE92 / 00471 Sec。 371日期1994年04月18日 102(e)日期1994年4月18日PCT提交1992年6月25日PCT公布。 出版物WO93 / 00548 日本1993年1月7日。本发明涉及一种材料,其中主要成分是PVC,用于制造管道,用于通过管道将管道重新排列在折叠状态下,被抽入管道并与内部表面接合 管道由温度升高。 通过添加可与PVC混合的聚合物热塑性弹性体,该材料的玻璃化转变温度为45-75℃,比例(Emod,T = 20℃)/(Emod,T = 75℃) C。)> 20。 本发明还涉及一种通过将这种管道与在挤出后折叠的管道相连的方式来恢复地下管道的方法。

    Method and apparatus for manufacturing ribbed pipe
    5.
    发明授权
    Method and apparatus for manufacturing ribbed pipe 失效
    制造胶管的方法和装置

    公开(公告)号:US5139730A

    公开(公告)日:1992-08-18

    申请号:US679014

    申请日:1991-05-02

    摘要: The invention relates to a method and apparatus for manufacturing ribbed piping, wherein a formable mass in a plastic state is extruded into a substantially cylindrical forming space of a corrugator, the forming space being delimited by forming molds movable in the production direction of the apparatus and having grooves on the inner surface thereof for forming rib flanges. A stationary kernel portion of a mandrel cools the interior surface of the piping and extends beyond the forming space constituted by the forming molds of the corrugator.

    摘要翻译: PCT No.PCT / FI90 / 00249 Sec。 371日期1991年5月2日 102(e)日期1991年5月2日PCT提交1990年10月23日PCT公布。 出版物WO91 / 06417 日期1991年5月16日本发明涉及一种用于制造肋状管道的方法和装置,其中塑性状态下的可成形块体被挤压成瓦楞机的基本上圆柱形的成形空间,该成形空间通过在 该装置的生产方向并且在其内表面上具有用于形成肋凸缘的凹槽。 心轴的固定内核部分冷却管道的内表面并延伸超过由波纹机的成型模具构成的成形空间。