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可了提高铸件的尺寸精度,防止产生一系列缺陷,现在用潮模生产铸件时,人们把一些特殊成分的加固料填塞到铸型表面工作层上,从而提高其紧实度。加固料应该具有这样的性能:它与铸型表面接触后在400秒内便可完全硬化,而且还有足够的有效期(不少于一昼夜);加固层的厚度≥8毫米;加固层应具有足够的冷态强度和很高的抗粘砂性;加固成分应由便宜的,非稀有的材料所组成。最有前途
To improve the dimensional accuracy of castings, to prevent a series of defects, and now the production of castings with tide mode, people put some special components of the reinforcement material filling the working surface of the mold surface, thereby enhancing its compaction. The reinforcing material should have such properties that it can be fully cured within 400 seconds after it has been brought into contact with the mold surface and that it is still sufficiently long (not less than one day and night), that the thickness of the reinforcing layer is ≥8 mm, that the reinforcing layer should have sufficient Cold strength and high anti-stick sand; reinforcement should be composed of cheap, non-rare materials. The most promising