NZ505803A - Twin sheet thermoforming mould having one mould half with a retractable pinch off region to assist in shearing off the seam of a thermoformed article - Google Patents

Twin sheet thermoforming mould having one mould half with a retractable pinch off region to assist in shearing off the seam of a thermoformed article

Info

Publication number
NZ505803A
NZ505803A NZ505803A NZ50580399A NZ505803A NZ 505803 A NZ505803 A NZ 505803A NZ 505803 A NZ505803 A NZ 505803A NZ 50580399 A NZ50580399 A NZ 50580399A NZ 505803 A NZ505803 A NZ 505803A
Authority
NZ
New Zealand
Prior art keywords
mould
seam
region
pinch
mould half
Prior art date
Application number
NZ505803A
Inventor
Stewart Vaughan
Christopher Jason Hill
Original Assignee
Fisher & Paykel Appliances Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fisher & Paykel Appliances Ltd filed Critical Fisher & Paykel Appliances Ltd
Priority to NZ505803A priority Critical patent/NZ505803A/en
Priority claimed from PCT/NZ1999/000006 external-priority patent/WO1999037465A1/en
Publication of NZ505803A publication Critical patent/NZ505803A/en

Links

Landscapes

  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

A method of twin sheet thermoforming is provided in which the seam (1) between sheets (7, 8) is trimmed from the finished part by a shearing action between cooperating edges of the mould halves (3, 4). In the preferred form, one mould half (4) is provided with a moveable pinch-off region (13) which retracts under pressure from the other mould half (3) to leave an edge of the mould half (4) adjacent the mould cavity which cooperates with an edge of the mould cavity of the other mould half (3) to provide the shearing action. The moveable pinch-off region may be a pinch-off member (13) supported in an annular channel (14) by a pre- compressed spring (15). The method allows significant plastic displacement of the material in the seam region for weld reinforcement along with trimming of the seam from the formed part within the mould in a one step process.
NZ505803A 1998-01-21 1999-01-21 Twin sheet thermoforming mould having one mould half with a retractable pinch off region to assist in shearing off the seam of a thermoformed article NZ505803A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NZ505803A NZ505803A (en) 1998-01-21 1999-01-21 Twin sheet thermoforming mould having one mould half with a retractable pinch off region to assist in shearing off the seam of a thermoformed article

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NZ32961498 1998-01-21
NZ505803A NZ505803A (en) 1998-01-21 1999-01-21 Twin sheet thermoforming mould having one mould half with a retractable pinch off region to assist in shearing off the seam of a thermoformed article
PCT/NZ1999/000006 WO1999037465A1 (en) 1998-01-21 1999-01-21 Apparatus and methods for twin sheet thermoforming

Publications (1)

Publication Number Publication Date
NZ505803A true NZ505803A (en) 2002-11-26

Family

ID=26651873

Family Applications (1)

Application Number Title Priority Date Filing Date
NZ505803A NZ505803A (en) 1998-01-21 1999-01-21 Twin sheet thermoforming mould having one mould half with a retractable pinch off region to assist in shearing off the seam of a thermoformed article

Country Status (1)

Country Link
NZ (1) NZ505803A (en)

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