Title:
METHOD AND APPARATUS FOR LONGITUDINAL WELDING OF TUBULAR BODY
Document Type and Number:
WIPO Patent Application WO/2012/106783
Kind Code:
A4
Abstract:
The method and apparatus are applicable in production of cans, bottles and more. It has enhanced weld quality, improved appearance and low waste. Laminated foil 2 moves with relatively constant speed and is formed around the mandrel 1. Over the foil edge 7 is placed compressing/cooling bar 10 having cooling channel 11, and over second edge 8 - compressing/cooling bar 12 having cooling channel 13. The profile of mandrel 1 in the heating area of overlapped edges 7 and 8 of foil 2 has step 5 to form cavity 6 between edges 7 and 8. The heating unit 3 is a nozzle supplying hot air into cavity 6. Melting of the foil 2 is limited only to the area, which is not in contact with compressing/cooling bars 10 and 12 and the mandrel 1. During further movement of foil 2 due to change in profile of mandrel 1, transforming into plane 9 the end 8 is lifted up while pressed the end 7 and the two together in compressing/cooling bar 10. After welding area there is cutter 4 to cut the tube into tubular bodies.я
Inventors:
HINKOV MIROSLAV IVANOV (BG)
Application Number:
PCT/BG2012/000009
Publication Date:
November 22, 2012
Filing Date:
April 04, 2012
Export Citation:
Assignee:
MECHATRONICA SC (BG)
HINKOV MIROSLAV IVANOV (BG)
HINKOV MIROSLAV IVANOV (BG)
International Classes:
B29C65/10; B29C53/50; B29C53/54
Attorney, Agent or Firm:
BENATOV, Emil Gabriel et al. (Asen Peykov Str. No 6, 1113 Sofia, BG)
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