PROCESS FOR PRODUCTION OF HEAT-RESISTANT HOLLOW ARTICLES MADE OF POLYLACTIC ACID-CONTAINING RESIN
    4.
    发明公开
    PROCESS FOR PRODUCTION OF HEAT-RESISTANT HOLLOW ARTICLES MADE OF POLYLACTIC ACID-CONTAINING RESIN 有权
    用于生产聚乳酸树脂含有的耐热中空体

    公开(公告)号:EP1849577A4

    公开(公告)日:2011-01-26

    申请号:EP05805984

    申请日:2005-11-08

    摘要: Provided is a process for the production of heat-resistant hollow articles that does not cause the deformation of injection-molded products or the incapability of the same being taken out of a mold. A mold 1 that comprises a female mold portion 3 having a concavity 2, a male mold portion 5 having a convexity 4, and a stripper plate 7 having an edge-forming part 6, is heated so that the temperature of a surface facing a cavity 8, which is enclosed by the concavity, convexity, and edge-forming part becomes the crystallization temperature of a polylactic acid containing resin, and the polylactic acid containing resin is injected via a gate 9. The temperature of the polylactic acid containing resin injected into the cavity 8 is measured by use of an infrared sensor 12, and when the polylactic acid containing resin is a temperature in the range between the temperature T 1 at which heat resistance exhibits itself and the temperature T 2 at which the bowl A cannot be released from the mold, the male mold portion 5 and the stripper plate 7 are moved in the direction in which the male mold portion 5 and the stripper plate 7 are spaced from the female mold portion 3. Mold release is performed by introducing gas into between the inner surface of the hollow article A and the convexity 4 of the male mold portion 5. The hollow article A is taken out of the mold 1 by advancing the stripper plate 7 in the direction of the hollow article A.