{"id":175,"date":"2009-05-05T22:31:10","date_gmt":"2009-05-06T03:31:10","guid":{"rendered":"http:\/\/leessilver.userblogs.ganoksin.coms\/?p=175"},"modified":"2009-05-05T22:31:10","modified_gmt":"2009-05-06T03:31:10","slug":"flow-lines-on-injected-wax-models","status":"publish","type":"post","link":"https:\/\/userblogs.ganoksin.com\/leessilver\/2009\/05\/05\/flow-lines-on-injected-wax-models\/","title":{"rendered":"Flow lines on injected wax models"},"content":{"rendered":"

WAX INJECTION AND WAX TEXTURING<\/p>\n

Wax injection can be a black art.\u00a0 What works for one may not work for others.\u00a0 Wax too hot can cause problems or solve problems.\u00a0 Mold temperature can be a problem.<\/p>\n

I have created many buckles for which I made rubber molds.\u00a0 Normally I do not have problems in the waxes I inject.<\/p>\n

I use Rio\u2019s Pink Buckle wax.\u00a0 I inject from my pressurized wax injector at a pressure of around 12 psi and a temperature a little less that 160 degrees.\u00a0 My wax pot is\u00a0 pressurized by a built in pump.\u00a0 I clamp the mold in a clamping device.\u00a0 That seems to work for me.<\/p>\n

I do not inject wax into a warm mold.\u00a0 If the wax is warm from a previous injection the design is not sharp.\u00a0 The edges are rounded and not sharp.\u00a0 Either a hot mold or too hot wax caused this problem.\u00a0 I find the best wax I get is from the first injection of the day.<\/p>\n

The faster the wax flows inth the mols the better.<\/p>\n

I think the lines you describe are chill lines caused by the wax flow stopping for an instant then flowing again. This could easily be caused by inconsistent pressure on the injector pump.
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\nThis is the back on one of my Bolas.\u00a0 It is around three inches long, 2 mm thick with engraving that is 1 mm deep.<\/p>\n

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If I have a problem getting wax into the bottom of the mold I spray the surface with silicone spray and put talc in the cut edges of the mold.\u00a0 If all that does not work I place 18 gage wires in the mold from the inside bottom of the mold to the outside.\u00a0 This provides large vent holes.<\/p>\n

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One solution to the flat back of the mold being not perfect is to texture it.\u00a0 One texture can be created by using a small wax burr in a cable driven hand piece.\u00a0 Tap the burr into the wax so that the burr just cuts a shallow cut.\u00a0 The texture can be varied by using different sizes of burrs.\u00a0 Note there are burrs sold by Rio that are specifically designed to cut waxes.<\/p>\n

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\nThese photos show the burr cut texture on the background of the tops of two of my seed pots.<\/p>\n

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