B - Operations – Transporting – 28 – B
Patent
B - Operations, Transporting
28
B
28/5
B28B 7/00 (2006.01) B28B 21/56 (2006.01) B28B 21/80 (2006.01) B29D 23/00 (2006.01) F16L 9/08 (2006.01) F16L 21/00 (2006.01) F16L 25/00 (2006.01)
Patent
CA 2006518
A B S T R A C T The components forming the layers of the composite pipe are successively introduced into a rotary drum (1). Firstly a plastics reinforcing layer (8) with a fibre reinforcement is introduced, the ends of the drum (1) being bounded by rings. The concrete core layer (16) is then introduced and by shaping rings fixed to the drum ends the length of the core layer (16) is shortened compared with that of the drum (1). The shaping rings are then replaced by other shaping rings (20, 21). Thus, on either side of the core layer (16) two annular spaces (22, 23) are formed, which are filled by a socket material (24, 25) of the same composition as the reinforcing layer (8). Thus, at one pipe end a socket end (28) is formed and at the other pipe end a spigot end (30), which are located within the composite pipe wall thickness. After introducing a second reinforcing layer (26), the production of the composite pipe is ended. By producing the socket connecting elements (28, 30) simultaneously with the construction of the composite pipe, a reliable and rational production of the composite pipe with its socket connecting elements (28, 30) is achieved. By shaping a shoulder (33) on to the spigot end (30), on sliding together two composite pipes the socket end (28) is centred. Simultaneously an annular space (34) is formed, in which can be inserted an elastic seal (35) for drip-tight sealing. (Figs. 3 and 5)
Bergmann Bernhard
Hartmann Peter
Bergmann Bernhard
Hartmann Peter
Marks & Clerk
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