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Hot Topic (More than 10 Replies) Bullet mold tune up (Read 6358 times)
KFW
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Re: Bullet mold tune up
Reply #15 - Nov 25th, 2019 at 8:22am
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Modified another of my creedmore molds using the very cool method JLouis provided in the post below. The roll pin spring hold down works so well I went out and bought a bag of pins for additional conversions.
thanks
kw
  
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bnice
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Re: Bullet mold tune up
Reply #16 - Nov 25th, 2019 at 8:43am
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KFW, How about of picture of your work.
  
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desert-dude
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Re: Bullet mold tune up
Reply #17 - Nov 25th, 2019 at 11:19am
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Has anyone tried the powdered graphite one buys for locks?
  
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JLouis
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Re: Bullet mold tune up
Reply #18 - Nov 25th, 2019 at 1:32pm
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A better picture of its actual use.

(You need to Login or Register to view media files and links)
  
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KFW
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Re: Bullet mold tune up
Reply #19 - Nov 25th, 2019 at 1:34pm
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Graphite under sprue plate works fine. Its maintaining the uniform plate tension on some molds that is the challenge. The roll pin finger assists in that.

kw
  
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Jeff_Schultz
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Re: Bullet mold tune up
Reply #20 - Nov 25th, 2019 at 5:20pm
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desert-dude wrote on Nov 25th, 2019 at 11:19am:
Has anyone tried the powdered graphite one buys for locks?

  It's OK; much better is spray on moly. It lasts quite a while. I credit Paul Shuttleworth for the tip.
  

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oldman46
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Re: Bullet mold tune up
Reply #21 - Nov 26th, 2019 at 12:32am
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I think JLouis hit the nail on the head regarding lapping the sprue plate flat and this does help the sprue plate hole to have a sharper edge which does a better job of cuttting the sprue. I think this problem is kind of common on factory not custom molds. I have an ancient cast iron surface plate I bought for $20 bucks over 40 years ago. And I use silicon carbide paper to flatten the underside of the sprue plate. Magic markers make good layout tools for seeing how things are progressing. But some of the sprue plate holes are so poorly cut that they would be hard pressed to cut a wet noodle. So I use a 60 degree center drill and recut the cutting edge. Once that is done a few more passes with the silicon carbide paper to get the burrs caused by redrilling the hole.. Saeco-Redding usually has good flat sprue plates and sharp cutting edges. The surface plate has never been tested to see how flat it actually is but have a stainless steel rule and no light shines through when last I checked it. The owner used to buy out old machine shops when they shut down. He had a 20' shipping container full of them. Frank.
  
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westerner
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Re: Bullet mold tune up
Reply #22 - Nov 26th, 2019 at 4:50am
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I always toss any washer. Adjust the mold when up to casting temperature.
  

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