SIMULTANEOUS MOLDING METHOD FOR PLURALITY OF BIAXIALLY STRETCHED BOTTLES

• Main Authors: DOI HAYATO, TAKEGAMI KAZUO, TSUCHIYA SHIROU
• Format: Patent
• Language: English
• Published: 21.12.1982
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; MAKING GRANULES OR PREFORMS; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; 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 obtain said bottles at a low cost from a parison of continuous length by a device of a simple mechanism, by heating a parison for molding a plurality of bottles in a heating oven to a stretching temperature and stretching simultaneously each bottle part of the parison via a pantograph mechanism. CONSTITUTION:A parison 1 is heated in a heating oven to a stretching temperature and held by clamps 3 of a stretching apparatus at regular intervals, and a plurality of all bottle parts is simultaneusly stretched longitudinally by a cylinder device 5 via a pantograph mechanism 4. Then, a stretching apparatus 2 is titled by 90 deg. as it is, each bottle part of the parison 1 is held by an upper mold 22 and a lower mold 23 of a molding machine 21 and the parison 1 is cut into each bottle. Then, by blowing air into each bottle via a needle provided at either of molds 22, 23 a bottle of a predetermined shape is formed by lateral stretching and a molded bottle is obtained.