Fiberglass insulating tube with multi-layer ring shaped braiding structure

Abstract

The present invention discloses a glass steel insulating tube with the multi-layer round structure, which is compounded with the multi-layer glass steel insulating tube, each glass steel insulating tube of the compounded glass steel insulating tube is the glass steel insulating weaving tube which is weaved at the moving type core tube by the horizontal knitting machine, each layer of the lass steel insulating weaving tube is dipped by the bond before the compound; the compounded glass steel insulating tube is compound under the same straight core mould, and finally shape and solidified by a pulling mould; the glass steel insulating tube is formed by the 2 to 5 layers of the glass steel insulating weaving tube. Compared with prior compound tube, the intensity and the accuracy of the glass steel insulating tube are improved greatly, the thickness of the tube wall only differ from 1 to 2 threads, in particular to the application of the micro electromotor double insulating tubes make the manufacture efficiency of the micro electromotor improve, and the cost is reduced, and the production craftwork is simple.

Description

Technical field: [0001] The invention relates to a glass fiber reinforced plastic insulating tube, which is mainly used for the glass fiber reinforced plastic insulating tube with a multi-layer annular braiding structure in electric tools and micro-motors of household appliances. Background technique: [0002] The current micro-motor manufacturers all use the micro-motor rotating shaft and silicon steel sheet to be sent to professional manufacturers, and the professional manufacturer uses BMC lumps to compress the middle of the rotating shaft and silicon steel sheet, make an insulating layer after curing, and then return to the factory for assembly. Although this method can meet the production needs of the motor, it has the following disadvantages: (1), the material needs to be transported back and forth, which increases the cost and wastes time: (2), this method is to press the BMC group material onto the shaft and the silicon steel sheet In the middle, each product needs t...

AI Technical Summary

Problems solved by technology

Although this method can meet the production needs of the motor, it has the following disadvantages: (1), the material needs to be transported back and forth, which increases the cost and wastes time: (2), this method is to press the BMC group material onto the shaft and the silicon steel sheet In the middle, each product needs to be cured for 2-3 minutes, and the production efficiency is low: (3) When recompressing, if the position of the shaft and the silicon steel sheet deviates, the motor is prone to vibration during rotation, which makes the product unqualified and the scrap rate is high

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

Patent 03138047.6 discloses a production method of pultruded pipes. Although the overall strength of the FRP insulating pipe produced by this method is strengthened, it has the following disadvantages: (1) Low production efficiency and high cost. The main reinforcement layer is woven on the machine, and then the inner and outer surface layers of the main reinforcement layer and the long fiber reinforcement layer are passed through the preforming die for pultrusion molding, which requires secondary production and low efficiency

At the same time, the main reinforcement layer, the inner and outer surface layers, and the long fiber layer are impregnated and pultruded through the mold at the same time, the resin is difficult to penetrate, and the product strength is low

(2) The precision is low and the thickness of the product is uneven. The inner and outer surface layers of this method are a kind of braid wrapped into a circular structure. If the width of the braid is smaller than the circumference of the garden, the reinforcing fibers cannot overlap each other to form a If there is a gap, the reinforcing layer has no effect. If the width of the braid is larger than the circumference, the fiber fabrics will overlap each other, and the product at this place will be thicker than other places.

(3) The strength is low, and the circular interface between the inner and outer surface layers is only bonded by resin, and the fibers are not integrated, so the high tensile properties of the fibers 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 fibers cannot be fully stretched, the fiber prestressing effect is lost, and the dimensional accuracy in the tube is low

(5) The FRP insulating pipe is only suitable for FRP conveying fluid media or anti-corrosion lined pipelines, especially oil pipes and high-pressure water injection pipes for oil fields, but it cannot meet the needs of micro-motors with higher strength requirements

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