I suggest you to get a waffle irons wrap with thick layers of cloths to heat up carved temple blanks at....55 to 65 degree celsius for 3 to 5 min. The heat will soften temple blanks like gummy worms. I usually leave it air cool for 20 seconds and then wet acete temple edges over 2mm of cotton pads in a tray with 1 mm high of cold water. The purpose is to cool off the edge of temple blanks only and keep the center hot to ensure temple core shooting straight without traveling warply! Once the core is "injected" into the blank, you might see a little bump on the center of the temple caused by extra plastic had no where to go after the core is inserted! Use a knife blade to scrape the bump off til surface is flat. I would use 400 grit of sandpaper stick to round off sharp corners followed by 600, 1,000 and then 1,500 sanding process before rough and fine polishing. The "injection" machine you mentioned will have the heating element to heat up the temple core up at 85 degree celsius. You will need to drop in one temple core in the matching size/shape of metal jig and wait....45 seconds til the core is evenly hot. The only trick is to keep the center of temple blank hot and then insert the core while it is also very hot to ensure smooth insertion. Make sense?
The challenge is making different profile of temple jig for each new design!!! You will need a jig saw to saw off from a matching thickness of metal plate (3.5 to 4 mm) each time
.
and then apply filing and sanding for smooth edges.....that is why custom frames cost arms and legs
.
The jig is made to hold and secure the temple blank firmly for the heated temple core insert from the other end.
PhiTrace's technique is very correct to laminate 2 pieces of Acetate together with Acetone. Much easier!
Bookmarks