OUTER DIE APPARATUS FOR FORMING SOCKET

• Main Author: AZUMA YOSHIO
• Format: Patent
• Language: English
• Published: 10.09.1982
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

PURPOSE:To form a socket having an accurate shape and dimensions without intruding pipe-material into the gap between dies by carrying out the draw pressing for the socket of a resin pipe by outer die composed of a pair of splitted partial dies between which sector dies are positioned. CONSTITUTION:A socket (undermention: work) P of a pipe held on an inner die T is positioned in the center of the gap between splitted partial dies 1A and 1B in which die grooves 7 with required cross section-shapes are formed, and thereafter, the splitted partial dies 1A and 1B are moved near one another by actuation of arms 4 through cylinders. Then the thrust slopes 8a of the thrust protrusions 8 of the dies 1A and 1B come in contact with the thrust surface 5b of the sector 5 on which die grooves 5a are formed, and the sectors 5 are continuously moved by wedge action to the die-center according to the approach-movement of the dies 1A and 1B. When the partial dies 1A and 1B touch the periphery of the work P, the die surfaces of the sector dies 5 also touch the periphery of the work P and push the work uniformly to the die center. Thus desired socket may be formed.