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Finishing the Master Plug Cavity (Continued)
64. Immerse the mold half (with Master Plug in) in hot tap water approximately ten minutes. This will expand the mold half body slightly. Not enough for you to see. This will also re-solulate the mold release. Fig. 62.
65. Beginning at position “A” (the tail wire eye): With a small screw driver; wedge the tip of the screw driver into the shaping wax, and under the wire eye. Exert light pressure downward on screw driver while lifting upward on the wire eye. The Master Plug should slip out of the Master Plug Cavity easily. Fig. 63. & Fig. 64. If the master plug does not easily slip out of the master plug cavity; move the screw driver to positions “B” & “C” to help loosen the master plug. Lift the master plug out of the master plug cavity from position “A”. Fig. 65.
66. Use the screw driver to remove the shaping wax from the wire eye beds. The wax should pop out easily. Fig. 66.
Removing the Mold Cavity Press Ridge
67. After the master plug is removed from the mold half face; there will be a small left over of M&CC protruding above the mold face. This must be removed in order to return the mold face to glass flat. Fig. 67.
68. Use instructions featured in FACTORY>TFI, TEAM>Accessories to make a small mold sanding block as seen in Fig. 33. & Fig. 34.
28. Place the mold half firmly into a table vise. With sanding block and #220 wet sand paper; wet the sanding block and the mold face. Position the sanding block over the mold cavity squarely. Do not allow the sanding block to make contact with the mold face; just the M&CC ridge. Fig. 33., Fig. 68. & Fig. 69.
69. With even downward pressure; Sand away the M&CC ridge until the sand paper begins to make contact with the mold face. Switch to #400 wet sand paper on the sanding block, and continue sanding until all remaining M&CC ridge is removed. Fig. 71.
Keep the mold face and the sand paper wet at all times, and rinse often.
NOTE: All mold making instructions, up to this point, were designed to accomplish one thing: That is to create a negative impression of exactly on half of the master plug. Everything you have done has been done without the use of measuring instruments. Therefore; you should not be concerned about a high degree of accuracy, or splitting hairs. Use your eyes. If things appear to be as they should be; that is close enough for a prototype development, or shape capture mold. We will fine tune these procedures in MOLD MAKING>Advanced Mold Making.
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