Of raw materials to make ALE Series Stroke Stop and Stroke Switch use of carbon steel, ordinary gray cast iron or ductile iron back to BURDEN; reduce the liquid iron in the alloy elements such as Cr, Mn and other content, reducing its molten iron-containing gas; before the next core sand core all the overhead brush paint and the storage period to prevent the sand core to absorb moisture; in rainy days or high humidity of the season, the next best to use torch to the former core cavity, the surface of sand core baking again, in order to reduce sand-fat content; high-temperature casting a small valve in order to facilitate their own exhaust and the reduction of molten iron casting slag produced.

6原料盡量使用碳鋼、普通灰鑄鐵或球墨鑄鐵回爐料；降低鐵液中的合金元素如Cr婷婷五月丁香六月综合、Mn等含量，減少鐵液自身含氣量；將下芯前的砂芯全部架空刷涂料且限期存放另类A片，以防砂芯吸潮；在陰雨天或濕度較大的季節(jié)91视讯亚洲一二三区，下芯前最好用噴燈將型腔0792dmz.com、砂芯表面烘烤一遍，以減少砂型發(fā)氣量在线观看日本黄色片；采用高溫澆注小閥門一级黄色毛片网站，以利于鐵液自身排氣和減少鑄渣產(chǎn)生。