As a new type of sand-making machinery, sand making machines offer significant advantages after structural upgrades: high sand-making efficiency, high sand-control ratio, and low energy consumption. They are increasingly widely used in industries such as highway construction, hydropower, and building materials, gaining industry recognition and experiencing rapid growth. Their motor power typically ranges from 45kW to 400kW, with an output of 50 to 500 tons per hour. They offer more stable performance and higher efficiency than traditional sand-making machines.
In a sand-making production line, various devices work closely with the sand-making machine: vibrating feeders deliver evenly, crushers provide coarse crushing and feeding, vibrating screens ensure quality control, sand washers clean and improve sand quality, belt conveyors efficiently transport materials, electronic control systems precisely manage each link to ensure coordinated operation, and water circulation systems provide water for sand washing and recycle it. Together, these devices create an efficient and stable sand-making process, improving sand-making efficiency and sand quality, and promoting the efficient development of the sand-making industry.
The sand making machine primarily consists of a feed hopper, a distributor, a vortex crushing chamber, an impeller, a main shaft assembly, a base, a transmission device, and a motor. The feed hopper guides the material in, the distributor distributes the material, the vortex crushing chamber forms a wear-resistant, self-lining material layer, the impeller accelerates the material's ejection and crushing, the main shaft assembly transmits power, the base supports the installation, the transmission device drives the impeller, and the motor provides power.
The working principle of the sand making machine is mainly based on the high-speed impact and friction of materials in the crushing chamber. The material enters the jaw crusher from the vibrating feeder for initial crushing, and then is refined by the small jaw crusher before being screened by the vibrating screen.
Qualified materials enter the sand making machine (the hammer crushing stage in the figure) and are crushed by the impact of the high-speed rotating hammer head. They repeatedly collide with the surrounding liner and rebounding materials, and at the same time, the materials rub against each other, eventually forming sand particles of the required particle size. After being cleaned by the sand washing machine, they are discharged from the discharge port.
The current system has obvious defects: it cannot adjust the speed and is difficult to flexibly adjust according to the actual transmission feeding and production; if the crusher is blocked or the motor is out of phase, it cannot protect the motor in time, which can easily cause damage to the motor; the mechanical frequency (machine frequency) impact is large during startup, which not only shortens the service life of the mechanical equipment and belts, but also causes a large impact on the grid voltage at the moment of startup, affecting the normal operation of other electrical equipment, and urgently needs optimization and improvement.
The FR500A inverter has significant advantages over the defects of traditional sand making machines: no PG vector control, large starting torque, precise positioning, and flexible speed adjustment to adapt to production; it runs smoothly, reduces mechanical shock, extends equipment life and has an efficiency of up to 95%; it uses a squirrel cage motor, is maintenance-free, and significantly reduces downtime; it has 12 types of protection and high-accuracy self-diagnosis to ensure safety; it can also significantly save energy, with considerable annual electricity savings and a short investment payback period, achieving safe, stable and economical operation of sand making.
FRECON FR500A series inverter drive control solution is deeply compatible with sand making machines and offers outstanding advantages. With features such as excellent speed regulation, smooth and low-consumption operation, simplified maintenance, comprehensive protection, and significant energy savings, it effectively overcomes the operational pain points of traditional sand making machines, creating a reliable and stable operating environment for sand making production lines, significantly improving production efficiency and economic benefits. It is an ideal choice for the sand making industry to achieve efficient, safe, and green production.
