Molding the Entex Porsche

[Mr Scott]

The doors were done in traditional box molds, nothing too fancy.






Here is a pet peeve of mine. I HATE punching vent holes in my molds. In the past I have tried using rubber cement to tack styrene rods to my master parts. It works about 50% of the time. The weight of the flowing rtv will knock over the rods. I know I could use a stronger glue/solvent but in most cases, especially this one, I don’t want to harm the master. This time I tacked down with rubber cement and then mixed up a few grams of rtv. I brushed it on to the rod base for extra support. When the small batch of rtv was reaching the end of its pot life I poured the mold. All my vents stayed in place and the RTV cured together as one. It seems to have worked nicely, but what a pain.

Does anybody have a better way?







Here are some castings. I have some minor bubble issues, especially with the strip on the back and the bottom of the door. I tried putting them in the pressure pot, but oddly enough I still had the same problem. So, why bother, the bubbles will be easy to fix.