scootermsp Posted May 10, 2015 Report Share Posted May 10, 2015 Just did my first Frog in this injection mold. I poured a white pearl belly, then the top was green pumpkin. 2 drops In 4 oz with .040 Black Hex. It came out awesome except one of the feet has a void in it. I purged the air, did a steady pressure and kept the pressure on for about 7 seconds. Sprue was filled over top. How can I get this perfect next time? Thanks in advance for your help. Everything was stirred well too. Quote Link to comment Share on other sites More sharing options...
Bassinfool Posted May 10, 2015 Report Share Posted May 10, 2015 Was it the foot that was oriented to the top side of the mold by chance? 2 Quote Link to comment Share on other sites More sharing options...
Apdriver Posted May 10, 2015 Report Share Posted May 10, 2015 I don't have that mold but have read guys vent the feet to make it shoot right. Quote Link to comment Share on other sites More sharing options...
scootermsp Posted May 11, 2015 Author Report Share Posted May 11, 2015 Bassinfool, yes! Top foot....highest point in mold when oriented up in injection position. I'm thinking of clamping mold in my big vise at a 45° angle for injection. Might work. I can also shoot it so Sprue hole is horizontal, that would make feet lowest part of the mold. Thoughts? Quote Link to comment Share on other sites More sharing options...
Bassinfool Posted May 11, 2015 Report Share Posted May 11, 2015 You could try those options but I would look at your temp as well, maybe try shooting it a little bit cooler. If that doesn't solve the issue you may need to open up the vents with a file. 1 Quote Link to comment Share on other sites More sharing options...
MonteSS Posted May 11, 2015 Report Share Posted May 11, 2015 That mold always had that prob Quote Link to comment Share on other sites More sharing options...
jeffhill Posted May 11, 2015 Report Share Posted May 11, 2015 Shooting colder is definitely the answer. I have 14 of these molds and I shoot them at 310 with the shooting star. They come out perfect every time. If I shoot any higher than 315-320 I start having issues with the hollow feet. I've also noticed that pushing a little harder and faster than normal on the injector seems to help, too. Hope this helps. 1 Quote Link to comment Share on other sites More sharing options...
scootermsp Posted May 12, 2015 Author Report Share Posted May 12, 2015 Thanks Jeffhill! Worked like a charm. Shot it just a little harder and faster at around 315°F instead of 350°F like the one that came out lousy. This seems to have done the trick! Just came out perfect....thank you so much for your help. Quote Link to comment Share on other sites More sharing options...
jeffhill Posted May 13, 2015 Report Share Posted May 13, 2015 No problem. Glad it worked out for you! Quote Link to comment Share on other sites More sharing options...
