chevy5099 Posted October 15, 2012 Report Share Posted October 15, 2012 I have a 6 cavitys craw molds. I get some air in each of the top of each crawfish cavity. Its in the same spot in each cavity I know when hot plastic gos into the cavity the air comes out from the sides of the plate. but that little air gets trap at each top cavitys. So I open the cavity hole more were the hot plastic gos in so the air can come out. Thanks Quote Link to comment Share on other sites More sharing options...
Bass-Boys Posted October 16, 2012 Report Share Posted October 16, 2012 hand pour or injection ? Quote Link to comment Share on other sites More sharing options...
chevy5099 Posted October 16, 2012 Author Report Share Posted October 16, 2012 hand pour or injection ? Hand Injection. I am also using floating bubblers in the plasitc Quote Link to comment Share on other sites More sharing options...
atijigs Posted October 16, 2012 Report Share Posted October 16, 2012 Most likely you are getting suck back from the plastic cooling and shrinking. Keep a little extra pressure on the injector after the cavity is filled. Be sure to over fill the sprue and them go back and top it off again with the hot plastic. As the cavity cools you want it to draw down plastic and not air. Quote Link to comment Share on other sites More sharing options...
