Method for forming unevenness on an outer surface of a...

Details Method for forming unevenness on an outer surface of a... Method for forming unevenness on an outer surface of a...

B - Operations, Transporting

29

C

18/940

B29C 59/02 (2006.01)

Patent

CA 1203963

Abstract of the Disclosure in order to improve the bonding strength between a synthetic resin-coated steel pipe and concrete applied arround said synthetic resin-coated steel pipe for weight coating or protection, unevenness formed of groove portions and ridge portions arranged alternately is formed on the outer surface of the synthetic resin-coated steel pipe by pressing the synthetic resin coating layer with a working tool having an uneven inner surface under a condition where at least one member of said working tool and said synthetic resin coating layer is kept at a temperature at which the synthetic resin is melted.

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