<P align=left><U>求教一段长一点的:)</U></P><P align=left><U>Some Typical Complications</U></P><P align=left><b>Burned or Scorched Parts:</b> Melt temperature may be too high. Polymer may be becoming trapped and degrading in the injection nozzle. Cycle time may be too long allowing the resin to overheat.</P><P align=left><b>Warpage of Parts:</b> Uneven surface temperature of the molds. Non-uniform wall thickness of mold design.</P><P align=left><b>Surface Imperfections:</b> Melt temperature may be too high causing resin decomposition and gas evolution (bubbles). Excessive moisture in the resin. Low pressure causing incomplete filling of mold.</P><P align=left><b>Incomplete Cavity Filling:</b> Injection stroke may be too small for mold (ie. not enough resin is being injected). Injection speed may be too slow causing freezing before mold is filled.</P>
<DIV class=quote><B>以下是引用<I>孤峰顶上</I>在2005-2-26 11:22:21的发言:</B> <br>
<P>cold</P>
<P>cold-pressed</P>
<P>cold-coining</P>
<P>cold-compacting</P></DIV><br><br><br><br>
<P>thanks for you kind help.</P>
<P>but I suggest <B>cold extrusion </B> would be much better.</P>
<P align=left><U>求教一段长一点的:)</U></P>
<P align=left><U>Some Typical Complications</U></P>
<P align=left><B>Burned or Scorched Parts:</B> Melt temperature may be too high. Polymer may be becoming trapped and degrading in the injection nozzle. Cycle time may be too long allowing the resin to overheat.</P>
<P align=left><B>Warpage of Parts:</B> Uneven surface temperature of the molds. Non-uniform wall thickness of mold design.</P>
<P align=left><B>Surface Imperfections:</B> Melt temperature may be too high causing resin decomposition and gas evolution (bubbles). Excessive moisture in the resin. Low pressure causing incomplete filling of mold.</P>
<P align=left><B>Incomplete Cavity Filling:</B> Injection stroke may be too small for mold (ie. not enough resin is being injected). Injection speed may be too slow causing freezing before mold is filled.</P></DIV>