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    • 4. 发明公开
    • PROCESS FOR PRODUCTION OF HEAT-RESISTANT HOLLOW ARTICLES MADE OF POLYLACTIC ACID-CONTAINING RESIN
    • VERFAHREN ZUR HERSTELLUNG VONWÄRMEBESTÄNDIGENHOHLKÖRPERNAUSPOLYMILCHSÄUREENTHALTENDEM HARZ
    • EP1849577A1
    • 2007-10-31
    • EP05805984.1
    • 2005-11-08
    • Matsuoka, ToshitakaKomatsu, Michio
    • Matsuoka, ToshitakaKomatsu, Michio
    • B29C45/43B29C45/73C08L67/00C08K3/22C08L101/16B29K105/16B29K67/00B29L22/00
    • B29C33/444B29C45/0001B29C45/14811B29C45/43B29C45/78B29C2045/7356B29K2995/006C08K3/013C08L67/04
    • 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.
    • 提供一种不会引起注射成型品的变形或不能从模具中取出的耐热中空制品的制造方法。 模具1包括具有凹部2的阴模部分3,具有凸部4的阳模部分5和具有边缘形成部分6的剥离板7被加热,使得面向空腔的表面的温度 由凹凸形状和边缘形成部分包围的聚氨酯树脂8由8表示为聚乳酸树脂的结晶温度,通过浇口9注入含聚乳酸树脂。将注入聚乳酸树脂的温度 通过使用红外线传感器12来测量空腔8,并且当含聚乳酸的树脂是耐热性显现的温度T 1与碗A不能释放的温度T 2之间的温度 从模具中,阳模部分5和剥离板7沿阳模部分5和剥离板7与阴模部分3隔开的方向移动。脱模执行 通过将空气引入空心制品A的内表面和阳模部分5的凸部4之间引入气体。通过使脱模板7沿中空制品A的方向前进而将中空制品A从模具1中取出 。