RESIN MOLD-COVERING METHOD FOR MOLDED RESIN PRODUCTS, RESIN MOLD-COVERING APPARATUS EMPLOYED IN THE SAME METHOD, MATERIAL USED FOR THE SAME COVER-MOLDING, AND MOLDED PRODUCT FORMED BY THE SAME METHOD

• Main Authors: MAKI, YOSHIKAZU, MATSUMURA, SHUSUKE, KAJIURA, HISANAO, HIGASHI, KEIJI, UESAKI, KOICHI, KOBAYAKAWA, MASUNORI
• Format: Patent
• Language: English; French; Japanese
• Published: 06.01.1994
• Edition: 5
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; COFFEE MILLS; DOMESTIC ARTICLES OR APPLIANCES; FURNITURE; HUMAN NECESSITIES; PERFORMING OPERATIONS; SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; SPICE MILLS; SUCTION CLEANERS IN GENERAL; TOILET ACCESSORIES; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

This invention enables the outer surface as a whole of a molded resin product to be covered with a coating material with uniform and satisfactory tension. A split mold is provided, which is capable of forming a hollow space between the tapering portions at the circumferential and slidable parts of upper and lower mold members thereof. A molding material is compression molded by using this mold, and the mold members are separated before the molded product has been completely cured, so as to form a space between at least one surface of the molded product and the opposed surface of a mold member. A gas flow directed toward the outer circumference of the mold is formed in the mold so as to send out the extraneous matter to the outside thereof via the mentioned space, and a fluidized coating material is injected into this space between the molded product and the opposed mold surface. The mold is clamped again, and the resultant product is cured under pressure. Produit moulé en résine dont la totalité de la surface externe peut être enrobée d'un matériau d'enrobage avec une tension homogène et satisfaisante. On a prévu un moule composite pouvant former un volume creux entre les parties effilées situées au niveau des zones circonférentielles et glissantes des éléments supérieur et inférieur du moule. On soumet un matériau à mouler au moulage par compression à l'aide de ce moule, et on écarte les éléments du moule avant que le produit moulé n'ait entièrement durci, afin de créer un volume entre au moins une face du produit moulé et la face opposée d'un élément de moule. On crée dans le moule un flux gazeux dirigé vers la circonférence extérieure de celui-ci, afin d'expulser les matières étrangères à travers ledit volume, et on injecte un matériau fluidisé d'enrobage dans ce volume entre ledit produit moulé et ladite face de l'élément. On referme le moule et on fait durcir sous pression le produit ainsi obtenu.