Tapered die assembly and elements thereof

Details Tapered die assembly and elements thereof Tapered die assembly and elements thereof

1989-10-30

1991-07-16

Bueker, Richard

Plastic article or earthenware shaping or treating: apparatus

Distinct means to feed, support or manipulate preform stock...

Extrusion shaping means

118405, 118419, 118420, B05C 500

Patent

active

050315684

ABSTRACT:
There is provided cross-head type die apparatus for applying a substantially concentric insulating layer to a conductor passing therethrough. Die assembly elements of novel structural combination are disposed within the substantially cylindrical cross-head such that they are in axial alignment with each other and the cross-head. In particular, a die insert or die tip has a front portion which tapers inwardly to substantially a point and includes an outlet orifice to guide the conductor along a passline towards a die orifice. A flow guide has a respective internal surface which tapers rearwardly to form a die orifice on its front surface. Cooperatively tapered surfaces securely fit the flow guide and the die tip within the cross-head axial bore such that a space is formed between the internally tapered surface of the flow guide and the front portion of the die tip. The die orifice and the outlet orifice of the die tip are axially aligned due to their respectively tapered fits within the cross-head. As the conductor is fed from the outlet orifice, injected plastic, which has flowed in the area between the flow guide and the die tip adheres to the conductor. The conductor concentrically passes through the die orifice of the flow guide and thus achieves a concentric layer of plastic thereon.

REFERENCES:
patent: 3752614 (1973-06-01), Bremer
patent: 3960530 (1976-06-01), Iyengar
patent: 4165957 (1979-08-01), Kertscher
patent: 4493747 (1985-01-01), Kanotz et al.
patent: 4505222 (1985-03-01), Holt et al.
patent: 4690627 (1987-09-01), Sebille

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