Annular member forming apparatus

Details Annular member forming apparatus Annular member forming apparatus

1992-08-21

1994-03-29

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Preform severing means

Means for forming from bulk material, means for severing and...

425315, 425375, 4253823, 264148, B29C 6578, B29C 6900

Patent

active

052979490

ABSTRACT:
An apparatus for forming an annular member simply with high accuracy, for example, a side tread and bead filler having a height in the radial direction comparatively larger than its thickness as a constituent member of a tire. A material, for example, a soft and fragile raw rubber at a high temperature is directly extruded through a mouthpiece of an extruder onto a rotating disc-like lower mold so as to adhere onto it. The lower mold is able dividable into plural lower mold segments. An arcuately curved extruded material is formed on the lower mold in this manner. The extruded material is not deformed during being cooled because it is strongly restrained by the receiving surface of the lower mold on which the material adheres. The extruded material is then cut along the divided lines of the lower mold segments. Lower mold segments thus having arcuately extruded materials, respectively, are then transferred to a restoration position and gathered together to form the original lower mold. Thereafter, ends of the arcuately extruded materials are joined with each other to form an endless annular member.

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