chachybaby Posted July 29, 2011 Report Share Posted July 29, 2011 Hey guys, Need some help... Just picked up a few single cavity injection molds. They are coming out great, but I'm finding I'm having a hard time producing more at a time. I knew already that a single cavity would take longer and be more time consuming. Heating the plastic, injecting, and then waiting for the mold to cool, by the time this happens the plastic I melted begins to harden and needs to be reheated again and again. I'm wondering if there is anything I should be doing to improve my process times with single cavity molds??? I'm working with a twin injector(that could used as two singles) any insight is greatly appreciated Thanks in advance Quote Link to comment Share on other sites More sharing options...
toadfrog Posted July 29, 2011 Report Share Posted July 29, 2011 Hate to say but you just have to buy more molds to increase production or purchase a production model. Most of the molds sold go by the premiss that you are only making your own in your leisure time. Quote Link to comment Share on other sites More sharing options...
Frank Posted July 29, 2011 Report Share Posted July 29, 2011 Two things that can help out. One is keep your heated plastic on a griddle so it does not cool as fast. This will not keep it hot forever but you should get four or five shots before you have to reheat. Even then if you reheat the sprues and add them back in it will kick up the heat in the unused plastic. Two is try and put your mold on another piece of aluminium, it will pull the heat from the mold like a radiator. In time it will get hot too. Getting more mold is easy but figuring out a system that works for you is way harder. Hope this helps. Frank Quote Link to comment Share on other sites More sharing options...
chachybaby Posted July 29, 2011 Author Report Share Posted July 29, 2011 Thanks Frank! Is dipping the closed mold in cold water a bad idea?? Not going too far in, just before the injection slot. Quote Link to comment Share on other sites More sharing options...
SHK Posted July 29, 2011 Report Share Posted July 29, 2011 Thanks Frank! Is dipping the closed mold in cold water a bad idea?? Not going too far in, just before the injection slot. YES!!!!!. 1. Hot plastic and water DO NOT mix. 2. hot aluminum and cold water usually equal warped aluminum. Quote Link to comment Share on other sites More sharing options...
GB GONE Posted July 29, 2011 Report Share Posted July 29, 2011 (edited) You will also see the water get pulled into the mold, even if you set it just on an area where a cup sweated water. Cool air is OK, aluminum is good but water is not a good choice UNLESS you protect the mold and no water gets to it directly. I.e. a cooling system with water in copper tubing would be fine... Jim Edited July 29, 2011 by ghostbaits Quote Link to comment Share on other sites More sharing options...
chachybaby Posted July 29, 2011 Author Report Share Posted July 29, 2011 haha damn good thing I checked with you guys first... that would of been interesting. Thx Quote Link to comment Share on other sites More sharing options...
