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随着对铸件质量要求的不断提高和出口产品的日益增加,自硬树脂砂在铸造业的应用越来越广泛,这是当前铸造技术改造的新趋势.采用自硬树脂砂生产铸件除了掌握其工艺性能外,还必须考虑自硬树脂砂的特点,解决好模样、芯盒的工艺.模样的工艺对铸件的质量和尺寸精度起着重要的作用.下面介绍我们的初步实践经验.一、模样的材料实践证明,木模、金属模、塑料模均适用自硬树脂砂.由于自硬呋喃树脂砂在硬化过程中的反应是放热反应,其副产物是水,而塑料模、金属模不吸水,且金属模导热性好,尤其
With the continuous improvement of the quality requirements of castings and the increase of export products, the application of self-hardening resin sand in the foundry industry is more and more widespread, which is a new trend of the current casting technology reforming.In addition to mastering Process performance, but also must consider the characteristics of self-hardening resin sand, to solve the good appearance, the core box process. The appearance of the process of casting quality and dimensional accuracy plays an important role. Here’s our initial practical experience. Practice has proved that wood mold, metal mold, plastic mold are suitable for self-hardening resin sand.As the reaction of the hard furan resin sand in the hardening process is exothermic reaction, the by-product is water, while the plastic mold, the mold is not Water absorption, and good thermal conductivity of the metal mold, in particular