Search the Community
Showing results for tags 'wet molding'.
Found 1 result
Hi there, everyone, I recently completed my first mold, made to form a simple rectangle with radiused corners out of 8oz. veg. tanned leather, and have some questions concerning how to improve the process. For starters, I'd like to adjust the mold. The mold base and presser piece are a mix of CNC'd plywood, and stacked laser cut MDF pieces. I've attached a section view of the mold. Do I need to include the lower radius on the buck--beyond the leather--or would it be best to minimize or eliminate it altogether? My reasoning was that it would help spread out the leather while pressed, but I'm a novice at this sort of thing! When designing the mold, I left hardly any clearance for the leather/buck/presser piece. This tight tolerance made it rather difficult to press. Additionally, I neglected to seal the plywood buck, and noticed that the individual ply layers were pressed into the leather. The ply was sanded smooth before use, so I assume that the individual ply layers swelled, creating these distinct layers. My guess is that a combination of the untreated wood and tight fit led to this pattern. I've attached a picture showing one of the corners, with the plywood pattern. I plan on adding some clearance between the buck and presser piece; would 1/16" be sufficient? 1/8"? From now on, these molds will be sealed with clear urethane. Is there something better to use for this purpose? One last thing-- my second and third pulls show a bit of a curve around the edges of the leather, bowing inwards. It's more pronounced in the photo, but it's there nonetheless. My process for the three is below: #1 - Soaked in cool water for 20 minutes, pressed, left to dry in mold for 2 days #2 - Soaked in cool water ~5 minutes, dipped in hot water for ~30 seconds. Left to dry in mold for ~24 hours. #3 - Soaked in cool water ~10 minutes, dipped in warm water for 1 minute. Left to dry in mold for ~24 hours. Could this bow be caused by pulling the leather too soon? Or, could it be something else entirely? Any help is greatly appreciated!