dvd - 2013-07-26 5:35 PM
So Dan, not to detour this thread, but how do they do the hand-laid bowls today?
Thanks! As always, you must first qualify which bowls you're asking about when you say, 'hand-laid' bowls. There are the foreign hand-laid bowls used in the VL series and the hand-laid bowls used in the custom guitars made in CT. Naturally, Ovation is somewhat closed-mouth about the exact processes and materials used in their bowls. I documented some of this in my thread titled, 'The History of the Bowl'. Per 'The Book': 1968-1970 2-ply cloth bowl hand-laid over male mold. Covered with clear plastic, apply vacuum and scrape excess resin. High-quality, but time-consuming to produce, thus very high cost. 1968-1970 2-ply cloth bowl hand-laid in a female mold. The fiberglass cloth weave is not visible on the inside of the 1st-Gen bowls. The cloth weave is visiible on the inside of the 2nd-Gen bowls. Since the glass weave is visible on this bowl, it's clearly a 2nd-Gen bowl. According to 'The Book', the 2nd-Gen bowls did not perform as well as the 1st-Gen bowls. Based upon my experience with molding fiberglass parts, this is due to the fact that when you mold parts using vacuum-bagging technique, you squeeze the excess resin out of the cloth. Laying up parts inside a female mold is much more difficult to use a vacuum-bagging technique. Thus, the amount of resin left inside the lay-up varies from part to part and from molder to molder. Per my email correspondance with John Budny: Me: The ad copy for the 1627 VL says: "Ovation’s new 1627VL features a shallow “Vintage Lyrachord®” body made from the same interwoven glass and hybrid resin materials used on early Ovations from the 60’s and 70’s." JB: 'On this model the bowls are molded overseas somewhere. They are not the same as the hand laid bowls used here for the Adamas line but are similar since they use the woven cloth layup method.' If you view the video found at: Ovation Factory Tour, Jason Barnes says that the woven fiberglass bowls are made using an autoclave. This process is similar to the vacuum-formed bowls of the 1960s in that the excess resin is 'squeezed' out of the the cloth/resin matrix. So, what this tells me is that the foreign bowls use woven-cloth, but beyond that, the exact molding techniques are somewhat hazy.
Edited by DanSavage 2013-07-27 12:42 AM
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