SAND CASTING EQUIPMENT.

The planetary rotor sand mixer is specially designed for the wet sand process in the foundry industry. It is used to mix green sand (clay sand), water and additives to form uniform molding sand. Its core working principle is:

Planetary motion mechanism: The rotor rotates at high speed while revolving (rotating around the center of the machine basin with the cross arm), forming a composite motion trajectory.

Strong mixing action: The rotor blades penetrate into the sand layer (close to the chassis) and generate centrifugal force through high-speed rotation (linear speed 16-19 m/s), so that strong rubbing, shearing and impact are formed between the sand particles, and the clay mass is efficiently broken and a uniform clay film is formed.

The old sand silo and coal powder, bentonite, and new sand silos are equipped with electronic scales, which can achieve accurate quantification and ensure accurate feeding. The internal spiral water spray device of the sand mixing silo can ensure accurate water addition.

1. Mixing device
The material is forced to be mixed by the composite actions such as squeezing and flipping when the planetary shaft with blades installed in the mixing drum rotates. The mixing blade is designed as a parallelogram structure. Customers can rotate it 180° for repeated use according to the actual wear condition, which effectively improves the utilization rate and life of the blade. A special unloading scraper is designed for the unloading speed to improve productivity.


2. Movement trajectory
The revolution and rotation of the mixing blade are determined after in-depth research and continuous testing, so that the mixer can achieve the maximum productivity when mixing aggregates of various particle sizes and specific gravities without segregation. The material movement trajectory in the mixing drum is smooth and continuous. This figure shows that when the revolution body rotates one circle, the movement trajectory of the mixing blade covers the entire mixing drum.

3. Water adding device
The water channel uses an upper structure to solve the problem of residual admixtures and water in the pipeline, avoiding losses caused by customers changing formulas. The nozzle adopts a spiral solid conical nozzle, which has a fine and uniform atomization effect, a large coverage area, and makes the material mixing more uniform.

4. Ultra-low energy consumption: Planetary rotor technology increases power utilization by 30%, reduces energy consumption by 25%, saves 20% of electricity bills, saves electricity and saves costs!
Evenly mixed sand: three-dimensional mixing, perfect fusion of green sand + binder, improved mold strength, reduced scrap rate, improved surface finish of castings, and doubled sand cleaning efficiency!
Extremely fast and efficient: The sand mixing cycle is shortened by 40%, production efficiency is doubled, and production capacity is boosted!
Environmental pioneer: low noise, low dust, suitable for green casting process, easily pass environmental protection review!

5. Wear-resistant and maintenance design
Wear-resistant materials: The blades and scrapers are welded with carbide, and the base is made of wear-resistant cast iron, which supports piece replacement.
Quick unloading: hydraulically driven side discharge door (emptied within 30 seconds) to avoid squeezing and leaking.
Modular structure: The rotor and scraper can be disassembled independently, and the maintenance cost is reduced by 50%.

6. Intelligent control adaptation
Adjustable parameters: support real-time adjustment of rotor speed and water addition, and adapt to different clay addition amounts (2.8-3.6%).
Overload protection: equipped with sensors to monitor current and temperature, and automatically shut down when abnormal.

The planetary rotor sand mixer solves the problems of low efficiency and many dead corners of traditional sand mixers through planetary compound motion + high power density distribution, and is especially suitable for the continuous production needs of modern foundry workshops. Its technical advantages are reflected in:
Specially designed for efficient green sand casting, the amount of binder is reduced by 15%, the sand mold is more collapsible, the unit energy consumption of sand mixing is increased by 40%, and the qualified rate of molding sand is greater than 95%
Wear-resistant rotor + modular structure, the life is extended by 50%, and the modular wear-resistant structure reduces the full-cycle maintenance cost, and the comprehensive cost is directly reduced!