Resin sand production process and overview

Process flow of resin sand processing line: After pouring, the sand box and castings are hoisted to the inertia vibration shakeout machine. After the sanding treatment, the castings are transported to the cleaning and shovel workshop, and the sand box is transported to the sand box warehouse for standby. Large pieces of jackets and risers are manually sorted, and the sand, sand mass and small pieces of cold iron through the falling sand grid fall to the magnetic separation belt conveyor, and after magnetic separation, they are transported to the multi-functional vibrating crushing and regenerating machine for crushing and stripping. , Screening, the sand after screening is sent to 1# bucket elevator, and is lifted from the elevator to the centrifugal rotor secondary regenerator for strong regeneration and full stripping. The regenerated sand mixed with fine powder, dust and resin film flows into the flow curtain air separator through the flow sand tank. The air separator is connected with the cyclone dust collector and the pulse type back blowing dust collector to remove the fine powder and dust. The reclaimed sand is then lifted to the sand warehouse by the 2# bucket elevator for standby. The upper feeding port of the mobile double-arm continuous resin sand mixer is connected with the sand outlet at the bottom of the sand storage by the pneumatic shutter. The sand flows into the mixer from the sand storehouse. In the sand mixer, the sand is transported forward through the screw blade to the beginning of sand mixing, the curing agent is added from the proximal control valve, and the resin is added to the proximal valve after premixing by the small blade, and then enters the sand mixing end. The curing agent, resin and regenerated sand are fully mixed and sent to the front discharge port to automatically flow into the prepared sand box for molding and core making. This equipment is controlled by imported PLC (programmable controllable) with excellent automation performance and is suitable for small and medium foundry enterprises with resin sand technology.

The advantages of resin sand production line are as follows: 

(1) Minimize the environmental pollution caused by the removal of waste sand, so that more than 90% of the waste sand can be recycled.
(2) Since the surface of the regenerated sand particles is smooth, the particle size distribution is uniform, and the micropowder is less, it can save more than 20% of the expensive resin.
(3) The regenerated sand has good thermal stability, less thermal expansion, stable chemical properties, lower acid consumption value, and easy control of resin sand properties, which is conducive to improving the quality of castings and reducing defects such as veining and mechanical sand sticking. The characteristics of furan no-bake resin sand: 1. The mold (core) has high strength and good collapsibility, which can ensure the dimensional accuracy and surface quality of the casting. 2. Good fluidity, can improve the filling of the mold (core), improve the quality and labor productivity of the mold (core), and reduce the labor intensity of workers. 3. Energy saving, the casting mold (core) only needs to be baked to meet the pouring requirements. 4. The old sand can be recycled and reused, which can further reduce the cost.