Effect of Secondary Injection-molding Condition on the Welding Strength and Interfacial Structure of Polyoxymethylene

DOI Web Site Web Site 1 Citations 21 References
  • QIU Jianhui
    Department of Machine Intelligence and Systems Engineering, Faculty of Science and Technology, Akita Prefectural University
  • TSUBOI Atsushi
    (株) 日立製作所オートモティブシステムグループ
  • IZUMI Kazuo
    (株) 日立製作所オートモティブシステムグループ
  • KUROKI Yu
    Department of Machine Intelligence and Systems Engineering, Faculty of Science and Technology, Akita Prefectural University
  • ZHANG Min
    陜西科技大学化学与化工学院

Bibliographic Information

Other Title
  • ＰＯＭの溶着強度と界面構造に及ぼす二次射出成形条件の影響
  • POM ノ ヨウチャク キョウド ト カイメン コウゾウ ニ オヨボス 2ジ シャシュツ セイケイ ジョウケン ノ エイキョウ

Search this article

Description

The relation of secondary injection-molding condition to the interfacial structure and shear welding strength of polyoxymethylene was investigated and following main results have been obtained. (1) The welding strength intensifies with increases of the secondary injection-molding speed and temperature. (2) With the increase in welding strength, the elongation to shear fracture becomes large also. The fracture mechanism of welding specimen changes from the interface debonding to the fracture with plastic deformation. (3) The higher the injection-molding speed and temperature, the molecule activation energy at the welding interface becomes high. So, the surface layer crystallization of the first molding is promoted and the trans-crystal layer is easy to be formed in the secondary molding side. It is thought to be advantageous to the improvement of welding strength. (4) Since the fracture starting point of welding specimen is at the welding interface or the surface layer of the first molding, the maximum welding strength is mainly determined by the strength of the surface layer.

Journal

Citations (1)*help

See more

References(21)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top