Research On The Performance Of PEPSET Resin Sand

This article in production conditions, by study on PEPSET resin sand ratio, resin addition, environmental temperature, drying temperature, environmental humidity, regeneration sand reduction amount, micro powder sand reduction, the original sand properties of resin sand properties (such as gas evolution, tensile strength and deformation, can use time, demoulding time, etc.) influence to find a reasonable process control to meet production deman.In PEPSET can guarantee the resin sand 8 minutes tensile strength and strength, and can get lower hair under the premise of gas, we will add quantity and components as 1.17%-1.24,resin component I:component II as the ratio 55:45.Only partially adjust catalyst hardening speed. If the production will greatly change sclerosis, adjusting production rate, should consider to replace catalyst type. Due to the catalyst can completely, thus tends to hardening reactions in a certain range, can increase the intensity of the resin sand.PEPSET resin sand production workshop with former sand round shape selected for fractal sand, angular coefficient less than 1.5, ADV value less than or equal to 6, the content of SiO2 more than 90%, particle size as 40/70 in the above, the sand particle concentration more than 80%, the original sand water less than or equal to 0.1%, good resistance to fragmentation, the original sand temperature range between 25 and 30℃.In order to reduce casting defects and ensure the normal operation of the procedure, Regeneration sand reduction amount should be under 2%, the content of micro powder less than or equal to 0.4%, Regeneration arenaceous temperature controlling range 25-35 degrees Celsius, particle size as 40/70, the sand particle concentration more than 80%.Environmental temperature on PEPSET resin sand sclerosis speed, can use time of performance. A temperature rise or fall 8.3 degrees Celsius, resin sand sclerosis speed will double or halve respectively. Ambient temperature is high, can use the resin sand short time, low temperature environment are the resin sand can be used for a long time.Environmental humidity on the strength PEPSET resin sand.Drying temperature is lower, the smaller the deformation, resin sand intensity is small. As temperatures rise, table dry resin sand's intensity is getting bigger, the deformation. In that small deformation and strength of sand production to meet demands of actual condition, table drying temperature as 160-180 degrees.