The properties of phosphate binder of no bake sand such as sand mixing technique,the amount of binder and hardener,the scrip time and work time,the shakeout property and humidity resistance are studied in the paper.
本文以新型磷酸盐为铸造型砂粘结剂,研究了混砂工艺,粘结剂加入量,固化剂加入量对型砂性能的影响,考察了该粘结剂自硬砂铸型脱模时间,型砂可使用时间,溃散性,抗吸湿性等。
The humidity resistance of the no-bake Al-phosphate sand was improved with the addition of the modifier to the no-bake Al-phosphate binder and changing the solidification humidity.
通过向铝磷酸盐粘结剂中加入改性剂和改变自硬砂固化湿度,研究了铝磷酸盐自硬砂的抗吸湿性,并利用电子探针对试验结果进行显微分析。
It is revealed that the room temperature compressive strength of no-bake sand is reduced by adding the magnesium-containing modifier;the humidity resistance is improved effectively when the amount of the magnesium-containing modifier is appropriate.
结果表明:加入含镁改性剂会使磷酸盐自硬砂的室温抗压强度下降,适量的含镁改性剂能有效地提高磷酸盐自硬砂的抗吸湿性;含硼改性剂能有效地提高磷酸盐自硬砂的室温抗压强度,对其抗吸湿性影响不大,适量的含硼改性剂能提高铝磷酸盐粘结剂的稳定性。
But the binder has the poor power to anti-moisture absorption.
钠磷酸盐无机粘结剂是一种高稳定性的呈胶体状态的粘结剂,用其作铸造粘结剂具有很高的铸型烘干强度,极好的水溶溃散性,但抗吸湿性很差,本文通过对钠磷酸盐改性,极大地提高了其抗吸湿性。