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将一种改性碱性酚醛树脂应用在无模铸型制造技术(Patternless Casting Manufacturing,以下称PCM技术)中,针对PCM造型设备的喷头对粘结剂粘度的要求,先通过乙醇稀释的方法将该树脂粘度降低至13 MPa·s,达到电磁阀式喷头适用需求。完成造型后,为了强化铸型,将砂型放在180℃的恒温箱内烘烤1 h,最终得到强度0.8 MPa,发气量15.6 m L/g的砂型,满足实际浇注要求。
A modified alkaline phenolic resin is applied to the patternless casting manufacturing technology (referred to as PCM technology below). According to the requirements of the viscosity of the adhesive on the nozzle of the PCM modeling equipment, a method of diluting ethanol with ethanol The resin viscosity reduced to 13 MPa · s, to meet the needs of solenoid valve nozzle. After the completion of the modeling, in order to strengthen the mold, the sand was baked in a 180 ° C oven for 1 h to finally obtain a sand with an intensity of 0.8 MPa and a gas evolution of 15.6 m L / g to meet the actual casting requirements.