Overview SMC (Sheet Molding Compound) it is to show course colophony macerate is short cut fiber or felt to wait enhance material, agent of embedded solidify agent, drawing of patterns, filling, small contractive dose, thickener gift this compound is different a shape moulding makings of function, can use at mould pressing to shape craft, below high temperature, high pressure cross-linking, solidify forms three-dimensional and reticulate structure. Car component treatment has the characteristic that shapes quickly, SMC sheet shapes through high temperature of mould pressing craft, high pressure, goods is had shape speed is fast, mechanical function tall, shrinkage low, surface smooth, treatment is convenient wait for a characteristic, perfect the demand that agreed with car domain. After 21 centuries, as high-powered colophony development succeeds, the application of goods of SMC answer material on the car is wider and wider. Colophony is the main component of SMC sheet, with the main body that enhances material to make SMC sheet, decided the basic function of material, its main effect is as follows: 1. Join action. Each constituent that colophony will not disperse before solidify infiltrates adequately, solidify hind forms an unified whole, provide mechanical performance. 2. The action that prop up. Colophony itself has particular mechanical function strength, press in the model one part load bears in controlling a process getting power. 3. Transfer balanced function. Because colophony is material of each photograph same sex, mould pressing controls a process getting power in, colophony matrix can diffuse force equably go out, enhance material to be material of each photograph opposite sex, squelch in the model in show irregular arrange dispersedly, be not successive model, need colophony increases somewhere fiber susceptive force delivers additionally one part, have balanced effect thereby. 4. Protect action. Composite material enhances photograph axial strength taller, yi She is broken, hygroscopic strong, when the interface is in be affected with damp be affected with damp to perhaps be corroded, mechanical function drops considerably. Mould pressing makes a surface form rich colophony layer, effective protection fiber avoids those who suffer outside ambient to destroy. The applied cent that goes up in the car in the applied SMC sheet on the car is 1.SMC sheet general-purpose, structural member, function 3 kinds big, not congener SMC sheet place applies a domain to differ, its constituent matchs bigger than having difference, the function that place expression comes out is not same also. General-purpose SMC sheet basically replaces original garnish and blame bear force structure, use glass reinforced plastics the light qualitative excel in, characteristic that can shape design, easily, replace the metallic stuff such as rolled steel, reduce the weight of component. Be like inside the handle inside dial of adornment board, appearance, light, door, change lever, engine to lid, coping, mothball box circumjacent, floor. Structure SMC sheet provides the mechanical performance such as the strength that structural member place needs, stiffness for the car, for excel in SMC, colophony matrix uses high-powered vinyl ester colophony or epoxy resin, basically use at automobile body, frame, be like coping of automobile body, batholith, bumper, door, calash, step, ala child board, seat framework, raised taller mechanical function requirement to SMC sheet, carbon fiber / annulus oxygen SMC has distinct advantage in this domain. Function SMC is the material that is aimed at special performance demand, if be able to bear or endure lukewarm, anticorrosion, tall tenacity, basically offer by colophony matrix, wait for need like gas cylinder of interface of cover board of housing of engine cover, gear case, gear case cover, wind scooper, cistern, fan, drainpipe, natural gas high temperature resistant, be able to bear or endure damp and hot, anti-corrosive requirement, bumper needs tall tenacity, the satisfaction with function very good SMC corresponding performance demand. 2. The characteristic that sheet of SMC of introduction of colophony of Hua Chang SMC shapes quickly because of its, need SMC colophony is had tall active, fast add the characteristic such as stiff, good wellability, high mechanical performance. Resorcinol of Hua Chang SMC is two kinds big, one kind is vinyl of oxygen of MFE series annulus ester colophony, another kind is MERICAN series colophony of not saturated polyester, if brand of colophony of Hua Chang SMC and applicable domain are expressed 1.
