< >又是很trouble的問題?。?!</P>
< >可能產(chǎn)生的原因如下:</P>
< >一、材質(zhì):</P>
< >1)Insufficient glass wet out with resin (dry glass)
玻璃纖維未能浸潤</P>
< >2)Foreign objects/contamination (film, flash, etc.) in or on the charge
有雜質(zhì)</P>
< >3)Wrinkles/pockets in discontinuous surface of SMC charge pattern
SMC表面不平整</P>
< >二、生產(chǎn)工藝:</P>
< >1)Adding small SMC pieces to charge pattern which trap air
小塊的SMC補(bǔ)片內(nèi)裹氣(布料不良)</P>
< >2)Insufficient pressure on SMC during cure cycle
固化時(shí)壓力不足</P>
< >3)Oven temperature heat-up rate too fast, especially in combination with a high moisture content part
烘箱加熱太快,特別是含水率偏高時(shí)</P>
<P>4)Improper charge patter (too large, rolled or folded)
充填不良</P>
<P>5)Vacuum too low; improper vacuum cycle
排氣動作不當(dāng)</P>
<P>6)Low cure time (under cure)
固化時(shí)間太短(未完全固化)</P>
<P>7)Press closure speed to fast (air trapped in laminate)
合模速度太快</P>
<P>三、模具:</P>
<P>1)Mold shear edge is too tight (not allowing air to bleed out)
模具間隙太?。o法排氣)</P>
<P>2)Tool Deflection
加工尺寸偏差</P>
[此貼子已經(jīng)被作者于2006-4-6 12:07:03編輯過] |