IPC分类号：
B29C45/00 | B29C49/06 | B29C49/22 | B29C49/48
当前申请(专利权)人：
Nissei ASB Machine Co. Ltd.
原始申请(专利权)人：
NISSEI ASB MACHINE CO., LTD.
发明人：
OIKE, TOSHITERU | ICHIHASHI, YUKIHIRO
摘要：
A method for manufacturing a resin container includes: a first injection-molding step of injection-molding a first layer of a bottomed cylindrical preform from a first resin material; a temperature adjustment step of accommodating the first layer manufactured in the first injection-molding step in a temperature adjustment mold, adjusting a temperature of the first layer, and forming an opening portion in a bottom portion of the first layer; a second injection-molding step of injecting a second resin material from the opening portion to an inner peripheral side of the first layer to laminate a second layer on the inner peripheral side of the first layer; and a blow-molding step of blow-molding a multilayer preform obtained in the second injection-molding step in a state where the multilayer preform includes residual heat from the injection molding to manufacture the resin container.
权利要求：
1. A method for manufacturing a resin container comprising: a first injection-molding step of injection-molding a first layer of a bottomed cylindrical preform from a first resin material; a temperature adjustment step of accommodating the first layer manufactured in the first injection-molding step in a temperature adjustment mold, adjusting a temperature of the first layer, and forming an opening portion in a bottom portion of the first layer; a second injection-molding step of injecting a second resin material from the opening portion to an inner peripheral side of the first layer to laminate a second layer on the inner peripheral side of the first layer; and a blow-molding step of blow-molding a multilayer preform obtained in the second injection-molding step in a state where the multilayer preform includes residual heat from the injection molding to manufacture the resin container.
2. A mold unit for cooling an injection-molded bottomed resin-made preform, the mold unit comprising: a core mold that has an outer shape corresponding to an internal shape of the preform and is insertable into the preform; a cavity mold that accommodates the preform and adjusts a temperature of the preform; and a movable member facing a bottom portion of the preform, wherein any one of the core mold and the movable member has a perforating portion that forms an opening penetrating the bottom portion of the preform.
3. The mold unit according to claim 2, wherein the perforating portion is formed from a distal end of the core mold so as to protrude in an axial direction of the preform, and the movable member includes a concave portion that receives the perforating portion.
4. The mold unit according to claim 2, wherein the perforating portion is formed in the movable member so as to protrude in an axial direction of the core mold, and the core mold has a concave portion that receives the perforating portion.
5. A blow-molding apparatus comprising: a first injection-molding unit configured to injection-mold a first layer of a bottomed cylindrical preform from a first resin material; a temperature adjustment unit that includes the mold unit according to any one of claims 2 to 4, the temperature adjustment unit being configured to adjust a temperature of the first layer manufactured by the first injection-molding unit and to form an opening portion in a bottom portion of the first layer; a second injection-molding unit configured to inject a second resin material from the opening portion to an inner peripheral side of the first layer to laminate a second layer on an inner periphery of the first layer; and a blow-molding unit configured to blow-mold the multilayer preform obtained by the second injection-molding unit in a state where the multilayer preform includes residual heat from the injection molding to manufacture a resin container.