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EP0233064A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Extrusion apparatus

Assignee: Alform Alloys Ltd
•
Filing: 1987-02-05
•
Granted: —
•
Expires: 2007-02-05
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Abstract

Abstract An extrusion apparatus is described in which a removeable die 12 is located in a die chamber 7 within a body 6 of the apparatus. A passageway 26 leads from an inlet 25 for extrusion material to the die chamber 7. A general squared-section sealing ring 30 is positioned in the passageway adjacent to the die 12. The sealing member 30 has the corner next to the face of the die 12 and passageway wall 26 chamfered. so that extrusion material pressing against the sealing ring forces that ring into sealing engagement with the die face and passageway wall in order to present undesirable flow of extrusion material about the die into the die chamber.

Inventors

  • 👤 Brian Maddock

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-09 21:08
CPC Classifications
B; B21; B21C; B21C23/00; B21C23/005; B21C25/00; B21C25/02

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 108 words
An extrusion apparatus comprising: a body (6) having a chamber (7) for receiving a die (10, 12); an inlet (25) in the body for extrusion material; a passageway (26) from the inlet (25) to an opening into the chamber (7); a die (10, 12) in the chamber with an input side juxtaposed with the opening to the passageway (26); a sealing member (30) positioned in the passageway (26) so that extrusion material passing through the passageway (26) towards the die (12) can press the sealing member (30) against the die (12) and the passageway to prevent extrusion material spreading around the die (12) into the die chamber (7).
Claim 2
Dependent Claim 108 words
An extrusion apparatus comprising: a body (6) having a chamber (7) for receiving a die (10, 12); an inlet (25) in the body for extrusion material; a passageway (26) from the inlet (25) to an opening into the chamber (7); a die (10, 12) in the chamber with an input side juxtaposed with the opening to the passageway (26); a sealing member (30) positioned in the passageway (26) so that extrusion material passing through the passageway (26) towards the die (12) can press the sealing member (30) against the die (12) and the passageway to prevent extrusion material spreading around the die (12) into the die chamber (7).
Claim 3
Dependent Claim 25 words
An extrusion apparatus as claimed in claim 1, wherein the sealing member (30) is a sealing ring (30) dimensioned to fit within the passageway (26).
Claim 4
Dependent Claim 43 words
An extrusion apparatus as claimed in claim 1 or 2, wherein the sealing member (30) preferably is formed so that the surface area of sealing member contactable by the extrusion material is greater than that which contacts the die (12) and passageway (26).
Claim 5
Dependent Claim 79 words
An extrusion apparatus as claimed in claim 1 or 2, wherein the sealing ring (30) is generally square in cross-section with two adjacent faces for contacting the extrusion material and one each of the other two faces for contacting the die (12) and passageway (26), and a common corner of the die and passageway contacting faces being cut away, so that the area of each of these faces is less than area of the corresponding extrusion material contacting face.

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