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使用水玻璃砂手工造型生产单件小批铸钢件,由于水玻璃砂流动性好,湿强度低,开箱起模时容易塌箱。实践中我们从模板的结构和定位原理中受到启示,反复试验,逐步改进并采用了基准定位锥定位形式-简易模板结构,其造价低廉,使用起来非常方便,深受工人们欢迎。 1.简易模板的结构设计 图1是简易模板的结构示意图。上下半模样的基准板为厚8mm、宽30mm钢板,其长度可依模样分模面大小而定。为定位准确,定位销锥、定位销和销套的工作的锥度应对应一致。定位销和基准板之间用两沉头螺钉联接(图2),基准与半模样之间用木螺钉联接。
The use of sodium silicate hand-shaped production of single-shot castings of small pieces, due to the fluidity of sodium silicate sand, low wet strength, easy to collapse box when starting the mold. In practice, we get enlightenment from the structure and positioning principle of the template, repeatedly test and gradually improve and adopt the positioning form of the reference positioning cone - simple template structure, which is cheap and easy to use, and is deeply welcomed by the workers. 1. Simple template structure design Figure 1 is a simplified template structure diagram. The upper and lower half of the reference plate thickness 8mm, width 30mm steel, the length of the sub-die according to the size of the sample may be. For accurate positioning, positioning pin taper, positioning pin and pin taper work should be consistent. Positioning pin and the reference plate with two countersunk head screw connection (Figure 2), between the reference and the half with wood screws.