Manufacturing process

1) Put a good model, and consolidate the nakedness. First fill in the right amount of yarn veil and back for the first time to consolidate and strengthen, sand-excavating and accurately put good live two blocks, then fill in the small amount of the veil, ramming live around the block, and then fill in sand compaction. 2) Scrape off the box under the excess sand mold and turn over the box 3) To block up the parting surface mould sand mold, recuperation, parting surface and sand 4) Place on a sand box, Have the positioning device) , according to the position of the technological requirements put the sprue and riser 5) Ram on fill in just the right amount of the veil, yarn, retaining good poured riser and consolidate a few times, and then included tamper good upward to light after the first 6) Box on the excess sand, leveling up out of the sprue, plunge into the vent 7) Out of the 8) Draw, attention should be loose and remove the shape and 9) According to the technological requirements issued a runner and sprue within 10) Repair the type. Repair cavity and sprue and riser 11) rated-locking