実成形時の冷却速度分布により発生するそり発生メカニズム : 金型温度非対称条件が樹脂流動に与える影響  [in Japanese] Warpage Generation Mechanism by Cooling Speed Distribution in Actual Injection Molding : Influence of Asymmetrical Mold Temperature on Resin Flow  [in Japanese]

Access this Article

Search this Article

Author(s)

Abstract

In some cases, warpage failure occurs in the injection molding plate. This warpage can be predicted by using injection molding CAE. However, the prediction accuracy is not enough in the warpage analysis of injection molding CAE. The warpage generation mechanism changes according to the material and shape. The mechanism has not been clarified in each condition. For example, there is difference in the cooling speed of the real injection plate in each position.<br>In this report, we considered the influence of the difference of mold temperature on warpage, assuming the mold temperature to be an asymmetric condition. And the following conclusions were arrived at. Moreover, upon examining the influence of mold temperature difference on warpage of PP plate, the following conclusions were obtained.<br>1) The amount of warpage grows in an asymmetrical mold temperature condition. The amount of warpage increases in the case of high mold temperature even if the difference of temperature between fixed side and moved side is constant.<br>2) In the case of asymmetrical mold temperature, the distribution of crystallinity becomes asymmetrical in the thickness direction. However, the thermal expansion coefficient is isotropy and constant.<br>3) The key factor of warpage in asymmetrical mold temperature conditions in PP is induced by thermal effect.<br>4) The resin flow of asymmetrical mold temperature conditions in PP becomes a symmetrical flow. This is thought to be influenced by heat of shearing and latent heat of crystallization.<br>5) Even under the same mold temperature asymmetric condition, differences in material cause the influence of mold temperature on flow to differ.

Journal

  • Seikei-Kakou

    Seikei-Kakou 19(2), 111-117, 2007-02-20

    The Japan Society of Polymer Processing

References:  14

  • <no title>

    多田和美

    材料システム 31, 71, 1994

    Cited by (1)

  • <no title>

    新保實

    成形加工 11(8), 726, 1999

    Cited by (1)

  • <no title>

    KIKUCHI H.

    Polym. Eng Sci. 34, 1411, 1994

    Cited by (1)

  • <no title>

    亀田隆夫

    成形加工 17(8), 571, 2004

    Cited by (1)

  • <no title>

    米谷茂

    材料 29(322), 42, 1980

    Cited by (1)

  • <no title>

    中裕之

    日本機械学会論文集(A編) 53(485), 153, 1987

    Cited by (1)

  • <no title>

    山田和慶

    成形加工 14(8), 496, 2002

    Cited by (1)

  • <no title>

    舘山弘文

    成形加工 15(10), 694, 2003

    Cited by (1)

  • <no title>

    佐藤和人

    成形加工 18(8), 593, 2006

    Cited by (1)

  • <no title>

    瀬戸雅宏

    成形加工 15(5), 363, 2003

    Cited by (1)

  • <no title>

    小川俊夫

    工学技術者の高分子材料入門 34, 1993

    Cited by (1)

  • <no title>

    阿部聡

    成形加工シンポジア'97 179, 1997

    Cited by (1)

  • <no title>

    阿部聡

    成形加工シンポジア'98 79, 1998

    Cited by (1)

  • <no title>

    JANSEN K. M. B.

    Int. Polymer Proc. 13, 309, 1998

    Cited by (3)

Cited by:  1

Codes

  • NII Article ID (NAID)
    10023957197
  • NII NACSIS-CAT ID (NCID)
    AN10278882
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    09154027
  • NDL Article ID
    8722093
  • NDL Source Classification
    ZP17(科学技術--化学・化学工業--高分子化学・高分子化学工業--ゴム・プラスチックス)
  • NDL Call No.
    Z17-1254
  • Data Source
    CJP  CJPref  NDL  J-STAGE 
Page Top