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木模的一些突出部位和棱角等处,在造型过程中,容易破损,尤其是用捣固机紧实时更为严重。木模破损必然会影响铸件外观质量。过去,为延长木模的使用寿命,在那些容易破损部位,我们常采用3～5mm厚的铝板或铁板包敷在木模表面,以提高木模强度防止变形。近年来,我们采用酚醛布板代替铝板、铁板,相比之下具有以下优点。1.铝、铁板对木模工来说,下料加工都比较困难,特别是几何形状较
Some prominent parts of wooden molds and edges, etc., in the modeling process, easy to damage, especially tamping machine tightening more serious. Broken wood mold will inevitably affect the appearance of quality castings. In the past, in order to extend the service life of wood mold, in those vulnerable parts, we often use 3 ~ 5mm thick aluminum or iron coated on the surface of the wood mold, in order to improve the strength of wood to prevent deformation. In recent years, we use phenolic cloth instead of aluminum, iron, in comparison with the following advantages. 1. Aluminum, iron mold for wood, the cutting process are more difficult, especially the more geometric shape