Preparation method for on-line pulling and extruding glass steel tube with multilayer annular weaving structure

Abstract

The invention relates to the making of multi layer knitting structure on the wire pulling glass steel tube using several computers controlling the two dimensional horizontal knitter, using core mold, stretch mold, extractor synthesizing the glass steel tube, setting resin dipping slot at the back of each knitter, even direct core mold at both ends of the core mold that follows with the movement of the ring knitting layer in the direction from the first two dimensional horizontal knitter to the last knitter through the dipping slot to the stretch mold. The glass tube in and out radius has high precision, thickness of each knitting layer adjustable, even in each dipping and consistent in strength.

Description

Technical field: [0001] The invention relates to a method for preparing a glass steel pipe, in particular to a method for preparing a movable inner mandrel, a multilayer circular braid, and an online pultrusion multilayer circular braid structure and an online pultrusion glass steel pipe. Background technique: [0002] At present, pultrusion is a widely used method for manufacturing FRP pipes. The method generally includes drawing multiple reinforcing fibers through a resin impregnation zone, and then pulling the impregnated fibers through a heated mold to solidify the resin and fibers. Together, the required glass steel pipe is formed. Since the pipe has only longitudinal unidirectional reinforcing fibers and only resin bonding force in the hoop direction, the bearing pressure is low. The pultrusion winding method is based on the pultrusion method. While pultruding, the longitudinal reinforcing fiber is hoop-wound, and then solidified by heating the mold. The glass steel pi...

AI Technical Summary

Problems solved by technology

The pultrusion winding method is based on the pultrusion method, and the longitudinal reinforcing fiber is hoop-wound while pultruding, and then solidified by heating the mold. The glass steel pipe produced by this method has increased strength in the longitudinal and hoop directions. , but because the longitudinal reinforcing fibers and the hoop reinforcing fibers are only superimposed, and there is no cross-braiding between fibers, the torsional strength is low

Chinese patent ZL03138047.6 announced "a fiber reinforced material pultruded pipe with a braided structure and its preparation method". The overall strength of the glass steel pipe produced by this method is enhanced, but there are still the following deficiencies: (1). First weave the main reinforcement layer on the braiding machine, then the inner and outer surface layers of the main reinforcement layer and the long fiber reinforcement layer pass through the preforming die, and are pultruded. At the same time, the main reinforcement layer, inner and outer surface layers, and long fiber layers are simultaneously impregnated and pultruded through the mold The resin is difficult to penetrate, and the product strength is low

(3) Since the circular interface of the inner and outer surface layers is only bonded by resin, the fiber and the fiber are not integrated, and the high tensile strength of the fiber cannot be exerted

(4) In this method, the inner mold adopts a tapered circular tube, and the diameter of each reinforcing layer becomes smaller as it is pulled, so that the reinforcing fiber cannot be fully stretched, the fiber prestressing effect is lost, and the dimensional accuracy in the tube is low. In short, the glass steel tube is only It is suitable for FRP conveying fluid medium or anti-corrosion lined pipelines, especially for oilfield oil pipes and high-pressure water injection pipes, but it cannot meet the needs of micro-motors with higher strength requirements

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