APPARATUS AND METHOD FOR MOLDING HOLLOW BODY

• Main Authors: YAMANAKA TOSHIFUMI, CHINO SHIGEO
• Format: Patent
• Language: English
• Published: 17.02.1998
• Edition: 6
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES; 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

PROBLEM TO BE SOLVED: To make a various kinds and small quantity manufacturing system possible, to improve accuracy of an opening and to eliminate the cause of burr and pinch-off of the bottom part by bringing a movable side platen close to a fixed side platen and inserting respectively two cores on the front face of a movable side mold plate into an injection cavity and a blow cavity. SOLUTION: Two pieces of the first cores 46 and 46 corresponding to injection cavities 32 are provided on the front face of a movable side mold plate and two pieces of the second cores 48 and 48 are provided in accordance with blow cavities 36. A movable side platen 40 is moved forward to position the first cores 46 and 46 at the central parts of half-divided parts 30 and 30 of the injection cavities. A pair of slide blocks 26 and 26 at the front face of a fixed side mold plate 24 are brought into contact with it and the half-divided parts 30 and 30 of the injection cavities are bonded to form blow cavities 36 wherein a preform 31 is bonded and the first cores 46 and 46 are stored and at the same time, the injection cavities 32 in which the second cores 48 and 48 are stored are formed.