METHOD FOR PRODUCING PIPING JOINT, MOLD THEREFOR, AND PIPING JOINT TO BE OBTAINED BY THE METHOD

PROBLEM TO BE SOLVED: To obtain a piping joint having a flat O-ring mounting place and free from parting line and to omit a cutting process for eliminating the parting line. SOLUTION: An annular member 32 concentrically circular to a screw core 31 is integrally formed at the upper end of the screw c...

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Bibliographische Detailangaben
1. Verfasser:	MIKAWA MITSUHARU
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING BLASTING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES JOINTS OR FITTINGS FOR PIPES LIGHTING MEANS FOR THERMAL INSULATION IN GENERAL MECHANICAL ENGINEERING PERFORMING OPERATIONS PIPES SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING THERMAL INSULATION IN GENERAL TRANSPORTING WEAPONS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To obtain a piping joint having a flat O-ring mounting place and free from parting line and to omit a cutting process for eliminating the parting line. SOLUTION: An annular member 32 concentrically circular to a screw core 31 is integrally formed at the upper end of the screw core 31 incorporated in a split mold 33 and the inner surface of the annular member 32 is formed into a stepped shape and a screw is formed to the small diameter part 32a of the member 32 and a flat circumferential surface is formed to the large diameter part 32b of the member 32. After molding, when the screw core 31 is revolved to be pulled out, a place wherein an O-ring is mounted corresponds to the large diameter part 32b to become a flat circumferential surface free from a parting line.