Hot runner manifold for thermally sensitive resins

Details Hot runner manifold for thermally sensitive resins Hot runner manifold for thermally sensitive resins

1996-02-06

1998-06-09

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

With apparatus assembly or dismantling means or with idle part

For extrusion or injection type shaping means

2642972, 2643288, 425549, 425572, B29C 4522

Patent

active

057629765

ABSTRACT:
A hot runner manifold and a method for making such, comprising a runner, a heating element, a sprue hole defined by said manifold and communicating with said runner at an intersection, said runner, having opposing ends, at least two nozzle drops communicating with the opposing ends of the runner at intersections, all of said intersections describing abrupt changes in direction, a runner insert sealably disposed within the manifold at each point of intersection, said insert defining a toroidal orifice, said insert having one inlet and at least one outlet, said inlet and outlet positioned to enable communication with the runner, and the orifice being free of sharp edges. The insert may be employed to change the level of flow of plastic within said manifold.

REFERENCES:
patent: 3923209 (1975-12-01), Roy
patent: 4256140 (1981-03-01), Swaroop et al.
patent: 4299553 (1981-11-01), Swaroop
patent: 4391579 (1983-07-01), Morrison
patent: 4588367 (1986-05-01), Schad
patent: 4648546 (1987-03-01), Gellert
patent: 4682945 (1987-07-01), Schad
patent: 4932858 (1990-06-01), Gellert
patent: 5295806 (1994-03-01), Gunther
patent: 5366369 (1994-11-01), Gellert
patent: 5441197 (1995-08-01), Gellert et al.
patent: 5518393 (1996-05-01), Gessner

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