Canadian foundryman (1917) . he mud gun before a cast, only one manshould do the work if the clay is beingfed at the funnel, because if two menare used, one to operate the plunger andone to feed the clay, one of them may becaughl by the plunger. Loading Clay In loading clay at the funnel do not push it down with your foot; use a , the gun can be loaded as welland more safely b.\ putting the clay inat the nose of the gun with a the gun is loaded, put about 3inches of dry sand or -ground ganistermixed with tar or black oil in the nose,removing enough clay to give room. W
Canadian foundryman (1917) . he mud gun before a cast, only one manshould do the work if the clay is beingfed at the funnel, because if two menare used, one to operate the plunger andone to feed the clay, one of them may becaughl by the plunger. Loading Clay In loading clay at the funnel do not push it down with your foot; use a , the gun can be loaded as welland more safely b.\ putting the clay inat the nose of the gun with a the gun is loaded, put about 3inches of dry sand or -ground ganistermixed with tar or black oil in the nose,removing enough clay to give room. Wetor sloppy clay may cause an explosionwhen it comes in contact with hot not wet the nozzle of the mud it with black oil after casting,while it is still warm, and again just ateast time. This will keep it from get-ting wet, and will prevent a shot ifthe nose of the gun is placed in the holeagainst a stream of molten iron. Oilingthe nose of the gun is better than warm-ing it, because if the nose is heated too. PH3. It. sake METHOD OP DRILLING A TAPPING plate over runner, shield in point of tapping hole, men Wearing proper clothing, air jet used to clean tapping hole. much or too long the clay will becomedry and stiff, and may cause a short heating the nose is preferred, pouringone or two hand ladles of cinder over itshould be sufficient. When easting do not use cold or wetbars to p°ke out sand, clay, or loam inthe runners or -ales or to break a pathfor the iron. Lift the punch-out ordrain gate (Fig. 15) slowly, to avoid arush of iron, which may cause boiling,and be sure the punch-out bar is turning the iron into a ladle seethat the ladle is spotted and is all not fill the ladle within more than 8or 9 inches of the top, as the iron maybe spilled in shifting it. Do not throwlarge pieces of cold scrap into the ladlebefore or during the cast, as it may causeboiling or an explosion of the hot is safer to fill the ladl
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