在通常的铸造生产中,主要采用粘土砂造型,其铸件质量差、生产效率低、劳动强度大、环境污染严重。随着对铸件的尺寸精度、表面质量要求的提高,以自硬树脂砂造型、造芯工艺得到普遍的使用。自硬树脂砂具有高强度、高精度、高溃散性和低的造型造芯劳动强度,是一种适合各种复杂中、小型铸件型芯制作的高效工艺。近年来采用冷芯盒树脂砂芯发展起来 In the usual casting production, the main use of clay sand modeling, the casting of poor quality, low productivity, labor-intensive, serious environmental pollution. With the dimensional accuracy of castings, surface quality requirements to improve, with a self-hardening resin sand molding, core-making process has been widely used. Self-hardening resin sand with high strength, high precision, high collapsible and low core strength of the workmanship, is a suitable for a variety of complex, small casting core production of efficient processes. In recent years, the use of cold-core resin sand core developed