Insert pipe for injection molding, insert pipe processing...

Details Insert pipe for injection molding, insert pipe processing... Insert pipe for injection molding, insert pipe processing...

B - Operations, Transporting

29

C

B29C 45/14 (2006.01) B21D 28/28 (2006.01)

Patent

CA 2342936

A number of holes (3) are formed in the outer circumferential wall (2) of a tubular metallic pipe (1) at regulator intervals in both circumferential and axial directions. Each of the holes (3) consists of a polygonal opening (4) and raised pieces (5) formed by bending the material of the outer circumferential wall (2) inwardly from the peripheral edge surrouding the opening (3). This pipe may be used as an insert pipe in injection molding an article such as a lead screw, an optical fiber ferrule or the like. The raised pieces reinforce the part of the pipe surrounding each hole, and enhances the bonding between the molding material and insert pipe.

Plusieurs orifices (3) sont situés dans la paroi périphérique extérieure (2) d'un tube métallique (1) à intervalles réguliers à la fois sur la circonférence et le long de l'axe du tube. Chacun de ces orifices (3) consiste en une ouverture polygonale (4) et en des pièces surélevées (5) obtenues par incurvation du matériau de la paroi périphérique extérieure (2) vers l'intérieur depuis le bord périphérique entourant l'ouverture (3). On peut utiliser ce tube en tant que matrice rapportée afin de mouler par injection un article, tel qu'une tige filetée ou une ferrule de fibre optique, par exemple. Les pièces surélevées renforcent la partie du tube entourant chaque orifice et améliorent la liaison entre le matériau moulé et la matrice rapportée.

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