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我厂铸钢车间采用水玻璃砂(吹 CO_2硬化)手工造型。长期以来,造型定位一直沿用打泥号或每套砂箱都做出一套定位装置的方法。前者定位准确性差,易造成偏箱缺陷;后者则增加砂箱的加工费用。为此,在生产中我们设计了一种定位销(见图1)。使用时,将销套埋在下砂型内(法兰上表面与分型面在同一平面上),做上箱时先将定位销插入销套,然后填砂造型即可(见图2)。它定位准确,且不必每套砂箱都做出定位装置,节约了砂箱的加工费用。
I plant steel workshop using sodium silicate (blowing CO_2 hardened) hand shape. For a long time, modeling positioning has been used to play mud number or set of each set of sand box positioning device method. The former positioning accuracy is poor, easily lead to partial box defects; the latter increase the sand box processing costs. For this reason, we designed a dowel pin in production (see Figure 1). When used, the pin bushing is buried in the lower sand mold (the upper surface of the flange is on the same plane as the parting surface). When the upper box is made, insert the locating pin into the pin sleeve first, then fill the sand mold (see Figure 2). It is accurate positioning, and do not have to make a positioning device for each set of sand box, saving the sand box processing costs.