METHOD OF PRODUCING MULTIPLE LAYER-COATED CURVED METAL PIPE

Japanese Patent JP3943003

B2

PROBLEM TO BE SOLVED: To produce a multiple layer resin-coated curved metal pipe in which a multiple layer coat having an epoxy resin, a thin film layer of a heat melting adhesive, and a thick film layer of a polyolefin is applied on the peripheral surface of a curved metal pipe.
SOLUTION: An incompletely cured anchor layer 2 of a curable epoxy resin is formed on the peripheral surface of the curved metal pipe 1, and a provisionally assembled multiple layer coat 5 in which the thin film layer 3 of the heat melting adhesive and the thick film layer 4 of the polyolefin are arranged in an adhesive state is formed on the layer 2. After that, by induction-heating the curved metal pipe 1 under the coat with an induction coil 25, the complete curing of the anchor layer 2 by heat conduction from the curved metal pipe and interlayer joining by the melting of the adhesive are advanced simultaneously, so that the coat 5 is completed in an integrated multiple layer coat, and the multiple layer-coated curve metal pipe is produced.

Hirayama welfare
Ryoji Kobayashi
Chihiro Kemizaki
Yasuyuki Taniguchi

JP2002297615A

July 11, 2007

October 10, 2002

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Dai-ichi Kogyo Kogyo Co., Ltd.

B29C65/46; F16L43/00; B29C63/14; B29C63/18; B29C65/04; B29C65/48; B32B15/08; B32B15/085; B32B15/092; F16L58/10; B29K23/00; B29K63/00; B29L9/00; B29L23/00; (IPC1-7): B29C65/04; B29C63/14; B29C63/18; B29C65/48; B32B15/08; F16L43/00; F16L58/10; //B29K23:00; B29K63:00; B29L9:00; B29L23:00

JP3244527A
JP61059095A
JP9174754A
JP3093527A
JP9504484A
JP59062373A
JP58222817A
JP61120738A
JP3240950B2
JP7156268A
JP11502163A
JP61148046A

WO1992003234A1

Kyozo Norimatsu

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