Hot runner sliding nozzle
AssigneeHusky Injection Molding Systems Ltd.
InventorsRobert D. Schad, Edward J. Jenko
Life of this patent
Estimating the term…
Abstract
The present invention relates to an improved nozzle-manifold assembly having utility in injection molding machines for making molded plastic articles. The nozzle assembly employs a clamp ring to apply a clamping force to the nozzle housing to cause it to mate with a manifold so as to prevent leakage of molten plastic material between the nozzle housing and the manifold. The clamp ring is mounted to the manifold by a plurality of screws whose tightening creates the desired clamping force and an effective seal between the nozzle housing and the manifold. The nozzle-manifold assembly also includes a centering ring for positioning the nozzle housing within a bore in a mold plate.
Claims23
An assembly for use in an injection molding machine for manufacturing molded articles which comprises:
- a nozzle housing having a first flow channel through which liquified material flows;
- said nozzle housing being positioned within a bore in a first mold plate;
- means for centering said nozzle housing within said bore;
- said first flow channel having a nozzle at a first end and being connected to a source of liquified material by a second flow channel in a manifold;
- said nozzle housing having a substantially flat end surface abutting a substantially flat surface of said manifold;
- said end surface of said nozzle housing being able to slide along said substantially flat surface of said manifold as a result of thermal expansion;
- and
- means for clamping said nozzle housing against said manifold to prevent leakage of said liquified material as said material flows from said second flow channel to said first flow channel, said clamping means comprising a clamp ring surrounding a portion of said nozzle housing and means for joining said clamp ring to said manifold and thereby creating a clamping force which maintains a seal between the nozzle housing and said manifold.
An assembly for use in an injection molding machine for manufacturing molded articles which comprises:
- a nozzle housing having a first flow channel through which liquified material flows;
- said nozzle housing being positioned within a bore in a first mold plate;
- said first flow channel having a nozzle at a first end and being connected to a source of liquified material by a second flow channel in a manifold;
- means for clamping said nozzle housing against said manifold to prevent leakage of said liquified material as said material flows from said second flow channel to said first flow channel;
- said clamping means comprising a clamp ring surrounding a portion of said nozzle housing and means for joining said clamp ring to said manifold and thereby creating a clamping force which maintains a seal between the nozzle housing and said manifold;
- and
- a centering ring surrounding a main body portion of said nozzle housing to center said nozzle housing within said bore, said centering ring being positioned adjacent to said clamp ring.
Dependencies are inferred from the claim text.