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Forums
Engineering
Materials and Chemical Engineering
Maintaining -320°F Liquid Nitrogen for Injection Molding
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[QUOTE="Diamond Dave, post: 5461012, member: 548235"] So instead of the LN2 being in the line behind the mold for 20 sec. after the material is packed. Do you think it would serve a better service to give a quick shot before the plastic is packed. Chilling the cavity before the hot plastic reaches the area would have the same effect. The tool I made is with cooling lines and the water going into the mold is coming from a chiller. What I have when I say closed loop is a hose used only for LN2 it would be on demand usage the pressure pump maintains the low line pressure. On/off valve going to intake port (copper tube) on mold. The ports are directed at and close to hot spots. Without knowing what cycle time for LN2 would be needed I would want a return line to the tank. Once it is dialed in and working It may not need a return line. It may only need an exhaust tube. LN2 has been used in molds for years but delivered a different way. [/QUOTE]
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Materials and Chemical Engineering
Maintaining -320°F Liquid Nitrogen for Injection Molding
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