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压铸模乳液涂料的润滑机理在于它的润滑剂大部分受热分解而释出气体。在整个压铸过程中 ,在模具型腔和金属间形成持久而又适度的气隙。润滑层由释放出的气体和残留的润滑剂所构成。所以润滑剂的发气特性和高温摩擦因数是控制乳液涂料的关键性能。在压铸过程开始时高温摩擦因数起主导作用 ,接着气体润滑的作用控制着整个过程。对于大型铝合金和镁合金铸件来说 ,必须在配方中加入高耐热性的成分 ,在整个压铸过程中才能够持久而且稳定地释放出气体。
The lubrication mechanism of die-casting emulsion paint lies in the fact that most of its lubricant decomposes to release gas. In the entire die-casting process, the mold cavity and metal to form a lasting and modest air gap. The lubricant layer consists of the released gas and residual lubricant. Therefore, the gas generation characteristics of lubricants and high temperature friction coefficient is to control the key performance of emulsion coatings. The high-temperature friction factor plays a dominant role at the beginning of the die-casting process and the gas lubrication then controls the entire process. For large aluminum and magnesium alloy castings, a high-heat-resistant composition must be added to the formulation to permanently and stably release the gas throughout the die-casting process.