RED Matthews
Posts: 2268
Joined: 8/2/2008 Status: offline
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So this is to tell you a little more about that bottle texture. The first one had to be chiseled into an iron mold. The two halves of the first mold had to be laid open and bolted to an L shaped right angle iron bracket on a ball vise. A ball vise has a half round lockable ball of steel. The first half of the mold was bolted to the L bracket by a bolt in the threaded pick-up hole in the top of the mold. From there the mold maker had to transfer the pattern onto a painted, machined and polished mold cavity. Then he could start chipping the iron away - the female of the ridges you see on the bottle. From there he had to do the other mold half. After that he would put the mold halves together with the bottom plate - put a chain clamp around the mold halves and pour the cavity full of molten sulphur. After the sulphur cooled he would take the chain clamp off and open the two mold halves from the standing bottle shape and lift it off the bottom plate. Now it was necessary to study the design on the sulphur and no doubt also have it inspected; to make sure all the detail was there and suitable to the design needed on the glass bottle. This was not a cheap mold set, but the rest of the set could have been Deckeled into the rest of the set on a flexible pantograph machine. Even then the mold halves would have to be moved, so the follower and the tool could extend into the cavity, to do the job of machining the detail. A set run on a DG (double gob) machine would have had to have had at least 36 molds. So there, some more of my TMI. RED Matthews
< Message edited by RED Matthews -- 7/12/2010 6:43:17 PM >
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