TERMIUM Plus®

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HOT RUNNER SYSTEM [4 records]

Record 1 2007-11-19

English

Subject field(s)
  • Plastics Manufacturing
DEF

The technique used to partially clear the resin from the injection nozzle after the injection cycle. By pulling the screw rearward, the resin is drawn back into the injector.

CONT

Most machines retract the screw slightly at this point to decompress the material to prevent drooling out of the nozzle. This is called the suck back and is usually controlled by a timer.

OBS

When the pressure on the sprue is not held long enough for the resin to cool before the screw returns, some of the hot resin in the cavities or runner system may expand back into the nozzle and cause sink marks on the finished part.

French

Domaine(s)
  • Plasturgie

Spanish

Save record 1

Record 2 2007-11-19

English

Subject field(s)
  • Plastics Manufacturing
CONT

... the runner system(which brings the hot plastic from the plasticizing chamber to the gate) ;...

French

Domaine(s)
  • Plasturgie
CONT

La plastification. Il s'agit de l'opération consistant à transformer, par apport de chaleur, un produit solide pulvérulent ou, le plus souvent, granulé, en une masse de consistance généralement pâteuse (état plastifié) capable de circuler à travers un réseau de canaux et d'épouser parfaitement les formes de la cavité du moule.

Spanish

Save record 2

Record 3 1998-02-02

English

Subject field(s)
  • Plastics Manufacturing
CONT

Insulated runner molds. A combination between a hot runner mold and a three-plate mold is called an insulated runner mold. The gating system is very similar to that of a three-plate mold except that the runners are very thick, at least 1 3/4in.(45mm) in diameter. There is no runner plate, and the backup plate and A plate are held together by latches. After the material is injected, the outside of the runner freezes but insulates the center, permitting the core to remain fluid at molding temperatures and act as a hot runner.

French

Domaine(s)
  • Plasturgie
Key term(s)
  • moule à canal isolé

Spanish

Save record 3

Record 4 1997-11-26

English

Subject field(s)
  • Plastics Manufacturing
OBS

Injection moulding.

French

Domaine(s)
  • Plasturgie

Spanish

Save record 4

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