JPS6375314U

JPS6375314U -

Info

Publication number: JPS6375314U
Application number: JP16929886U
Authority: JP
Priority date: 1986-11-04
Filing date: 1986-11-04
Publication date: 1988-05-19

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例を示すスクリユヘ
ツドの一部切欠断面図、第２図は第１図の一部を
拡大した断面図、第３図はリング前端面部を示す
断面図、第４図は従来のスクリユヘツドを示す一
部切欠斜視図である。１０……スクリユヘツド、１２……スクリユヘ
ツド先端部分、１２Ａ……後部大径側、１２Ｂ…
…後端面部、１５……スクリユヘツド本体部分、
１７……樹脂通路、１９……環状溝部、２０……
リング、２０Ｂ……前端面部、２９……環状溝部
、３０……バレル、３５……計量チヤンバ、４０
……球体、Ｌ……直径。 Fig. 1 is a partially cutaway sectional view of a screw head showing an embodiment of this invention, Fig. 2 is an enlarged sectional view of a part of Fig. 1, Fig. 3 is a sectional view showing the front end of the ring, and Fig. 4 is a sectional view showing the ring front end. The figure is a partially cutaway perspective view showing a conventional screw head. 10...Screw head, 12...Screw head tip, 12A...Rear large diameter side, 12B...
... Rear end surface part, 15 ... Screw head main body part,
17... Resin passage, 19... Annular groove, 20...
Ring, 20B... Front end surface portion, 29... Annular groove portion, 30... Barrel, 35... Metering chamber, 40
...Sphere, L...Diameter.

Claims

[Scope of utility model registration request]

A ring for opening and closing the resin passage is movably provided in the axial direction between the tip of the screw head of the screw mounted in the barrel and the wear plate, and the rear large diameter side of the tip of the screw head is the outer diameter of the ring. In addition, annular grooves facing each other are formed on the rear end surface of the tip of the screw head and the front end of the ring, and a distance between the two annular grooves is larger than the maximum distance between the tip of the screw head and the ring. A screw head for an injection molding machine, characterized in that a sphere having a large diameter is inserted around the entire circumference.