Continuous production device of steel plastic composite pipe having holed steel skeleton surface coated with binder

Abstract

An apparatus for continuously manufacturing the composite steel-plastics pipe whose perforated steel skeleton is coated by adhesive is composed of a shaping-sizing welder unit, adhesive coating unit,steel skeleton heater, extruding out unit with hollow core die and cooling-sizing sleeve, and sizing-cooling unit.

Description

Technical field: [0001] The invention relates to a metal frame with holes as a reinforcing body, and a production device for extruding composite polymer materials on the inner and outer surfaces of the frame to form metal frame-reinforced plastic composite pipes, in particular to a metal frame with holes A continuous production device for plastic composite pipes that are pre-coated with an adhesive layer before the composite material is extruded on the surface. Background technique: [0002] There are many methods and devices for the production technology of steel-plastic composite pipes, as well as corresponding patents, which use a metal skeleton with holes as a reinforcement, and extrude a composite polymer material on the skeleton as a continuum to wrap the skeleton to form a steel-plastic composite pipe. 的报道和公开,如英国专利GB2255、148A92.10.28,中国专利申请号94104509.9、申请号98119383.8、申请号99232026.7申请号99232162.X和99232214.6申请号99114790.1申请号00222720.7和00132035.1申请号99112221.6申请号01113962.5。 ...

AI Technical Summary

Problems solved by technology

[0004] The prior art relates to coating or coating the inner and outer walls of steel pipes or aluminum pipes, steel pipes with an adhesive layer and then extruding the polymer layer or bonding the finished polymer pipe with the adhesive layer to form a composite pipe However, this kind of composite pipe is different from the metal skeleton with holes and the composite pipe of the polymer. Although the composite pipe composited with the metal pipe without holes has good pressure bearing capacity and strong anti-corrosion ability, the polymer The linear expansion coefficient of the polymer layer and the metal pipe is an order of magnitude different. When used in a heated environment or a cold environment, the polymer layer will be significantly elongated or shortened compared with the metal pipe in the middle layer, so that the metal pipe at the end of the pipe will be exposed. Anti-corrosion failure, in addition, the connection between the pipe fittings and the pipeline is only connected by a thin layer of polymer on the outer layer. Whether it is a hot-melt connection or a mechanical clamp connection, there is no connection strength. The pressure capacity is not equal, the connection is the weakest and not durable, unsafe, this kind of pipeline is not good in practical application due to the difference in linear expansion coefficient of different orders of magnitude of different materials

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