Sand treatment equipment manufacturers talk about how to choose resin sand production line

Sand treatment equipment manufacturers talk about how to choose resin sand production line

How to choose the resin sand production line explained by the sand processing equipment manufacturer? Because the resin sand production line has the advantages of high dimensional accuracy and good surface finish, it is more and more favored by foundry enterprises. However, the production enterprises of resin sand treatment production line are mixed. Take the production line with an annual output of 3000 tons of castings as an example: one ton of sand mixed with one kilogram of resin wastes 100000 yuan. The quality of reclaimed sand is an important standard to measure the quality of resin sand processing production line. Including loss on ignition, stripping rate, fine powder content, angle coefficient of gravel, etc. The old sand will become recycled sand after iron removal, crushing, demoulding, screening, powder removal and other processes. Each process has strict technical standards, which will directly affect the quality of reclaimed sand.

Sand processing equipment manufacturer: 1. crushing: The friction force of the grid plate is affected by the weight of the sand block and the vibration force of the vibration motor. The manufacturer shall provide detailed data to ensure that the friction of the grid plate is less than the impact resistance of the gravel. Otherwise, the gravel is easy to be broken and refined, which will reduce the recovery rate of the old sand and increase the production cost. Microscopically, the increase of the gravel angle coefficient (spherical well) will increase the surface area of the gravel, increase the amount of resin, and reduce the air permeability of the molding sand.

Sand treatment equipment manufacturer: 2. stripping: the resin film in the sand mold near the casting within 500 degrees will be burned and burnt. The presence of the coke film affects the strength of the sand mold, wastes a lot of resin and needs to be removed. However, the surface of the sand is wrapped with a resin film without paste, which can not only reduce the amount of resin, but also increase the yield of the sand mold, so it cannot be removed. The peeling device uses an impact force to peel off the paste film. Also, the impact force needs to be less than that of the gravel. Manufacturers are obliged to help foundry enterprises determine a reasonable sand-iron ratio, so that the mold release rate is 26% and the burning loss is 4%.

Sand processing equipment manufacturers: advantages and disadvantages of resin sand production line

Sand processing equipment manufacturers: advantages of resin sand production line

1. The casting has high dimensional accuracy and clear external contour; the casting surface is smooth and the appearance quality is good; the dense casting has high comprehensive quality.

2. Resin sand has good fluidity, easy compaction, adjustable demoulding time, high strength after hardening, and no deformation during subsequent handling and closing. Due to the high rigidity of resin sand, there is basically no wall displacement during pouring and solidification, so the dimensional accuracy of castings is high, which can be improved by 1-2 grades compared with castings produced by clay sand and oil sand.

There is no need to dry, which shortens the production cycle and saves energy. No drying process is required, the molding sand is easy to compact, has good collapsibility, and is easy to clean, which greatly reduces the labor intensity of workers and creates conditions for mechanized production.

Sand processing equipment manufacturers: Disadvantages of resin sand production line

1. If the curing time is large after molding, multiple sets of molds need to be made;

2. High quality requirements for raw sand;

3. Free formaldehyde with pungent odor in the air during the on-site production of molding and pouring;

4. The production cost of resin sand is higher.

The above is a small series of sand processing equipment manufacturers to introduce in detail the advantages and disadvantages of resin sand production line, I hope to help you.