FIELD: technological processes.
SUBSTANCE: method for cavity calking in hollow section made of thermoplastic having substantially rectangular cross section and formed in the form of pipe by means of spiral winding, consists in the fact that slot is arranged in profile wall on external side or internal side of pipe, which passes along the whole width of cavity in section. Plate of thermoplastic with cross section that corresponds to length and width of slot and height that is more than section height is inserted into section via slot. Plate is welded to internal side of section side walls after surfaces inside section and thermoplastic plates subject to joining have been processed and heated to melted condition.
EFFECT: simple and very reliable calking of cavity in section and minimum action at pipe structure in the form of suction effects and stresses.
12 cl, 5 dwg
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