Easy collapsibility foundry sand polymerizer and preparation method thereof

The invention discloses an easy collapsibility foundry sand polymerizer and a preparation method thereof which aim to solve the problems that more energy is consumed, the thickening degree is high, surface activation cannot be achieved and the like in the conventional foundry sand polymerizer. The method comprises the following steps of: metering hydroxymethyl propyl cellulose, fatty alcohol ether, and cyclodextrine respectively, pouring into an appropriate amount of reclaimed water, and uniformly stirring until the hydroxymethyl propyl cellulose, the fatty alcohol ether, and the cyclodextrine are dissolved in the water; and after polyacrylamide is dissolved in water at the temperature of between 50 and 80 DEG C for 20 minutes, mixing the polyacrylamide solution and the mixture in the step and uniformly stirring to form paste to obtain negative ion activator; and adding the obtained negative ion activator into sodium silicate in the mass ratio of 1:(1.5-6), stirring at normal temperature for 10 to 15 minutes,