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公开(公告)号：US4300839A
公开(公告)日：1981-11-17
申请号：US143473
申请日：1979-06-28
申请人： Mamoru Sakagami
发明人： Mamoru Sakagami
CPC分类号： B29C47/625 , B29B7/483 , B29C47/0844 , B29C47/0861 , B29C47/0881 , B29C47/40 , B29C47/402 , B29C47/60 , B29C47/0009
摘要： This invention relates to a self-cleaning type extruder including a cylinder and at least two screws therein adapted to rotate in the same direction, the screws being in such a relation that at any position in at least a part of the screws which lies in the longitudinal direction of the extruder, the contour of one screw in a cylinder cross-section taken at right angles to the screw axes is in substantial contact at one point with the contour in the same cross-section of another screw intermeshing therewith. A conventional self-cleaning type extruder lacks the ability to knead a resin stock uniformly and sufficiently. This defect of the prior extruder is removed in accordance with the present invention by improving the aforesaid self-cleaning type extruder in such a way that each of the screws has at least two screw flights, and the top of at least one of the screw flights is substantially in contact with the inner wall surface of the cylinder and the top of at least one other screw flight has a predetermined tip clearance with respect to the inner wall surface of the cylinder. The extruder of this invention can achieve uniform and powerful kneading and melting of the resin stock.
摘要翻译： 本发明涉及一种自清洁型挤出机，其包括圆筒和至少两个螺钉，其中适于沿相同方向旋转，所述螺钉处于这样的关系中：在至少一部分螺钉中的位于 在挤出机的纵向方向上，与螺杆轴成直角的圆筒横截面中的一个螺杆的轮廓在与其相互啮合的另一个螺杆的相同横截面中的一个点处实质接触。 常规的自清洗型挤出机缺乏均匀且充分地捏合树脂原料的能力。 根据本发明，通过改进上述自清洁型挤出机，使得每个螺杆具有至少两个螺杆螺纹，并且至少一个螺杆螺纹的顶部 基本上与气缸的内壁表面接触，并且至少一个其它螺旋螺纹的顶部相对于气缸的内壁表面具有预定的顶端间隙。 本发明的挤出机可以实现均匀且强力的树脂原料的捏合和熔融。
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公开(公告)号：US4038850A
公开(公告)日：1977-08-02
申请号：US688082
申请日：1976-05-19
申请人： Mamoru Sakagami
发明人： Mamoru Sakagami
CPC分类号： B21D22/16 , A63B59/50 , A63B2102/18
摘要： The present invention enables the efficient production of integral baseball bats made of metal tubing by use of a unique process utilizing a forming machine without welding or joining individually processed portions, this process comprising substantially the following major steps:The step of rotationally forming the body portion by pressing a plurality of spinning rollers of three or more in number synchronously on the tubing with a pre-formed mandrel inserted therein;The step of rotationally forming the grip portion by urging another plurality of rollers against the tubing at the rear portion thereof after retracting the tailstock; andThe step of rotationally forming the other end portion of the tubing which is re-chucked after an interruption of working followed by a turn-over of the tubing which has been removed from the mandrel.
摘要翻译： 本发明能够通过利用成形机的独特工艺有效地生产由金属管制成的一体棒球棒，而不用焊接或连接单独加工的部分，该方法包括基本上以下主要步骤：
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