Large-scale sand-making machines meet the requirements for granite sand production

Currently, sand-making machines are widely used for sand production in the sand and gravel aggregate industry. However, conventional hammer-type sand-making machines have poor sand-making performance, suffer from severe equipment wear, and incur relatively high maintenance costs. We recommend using impact-principle sand-making equipment, specifically impact sand-making machines, for processing granite. By employing the ‘stone-on-stone’ + ‘stone-on-iron’ principle, these machines cause minimal equipment wear and have gained widespread recognition in the industry.

Advantages of sand-making machines

1. Quick conversion between crushing modes:

By optimising the crushing chamber structure, the machine can quickly switch between ‘stone-on-stone’ and ‘stone-on-iron’ crushing modes. The ‘stone-on-stone’ mode adds material layer partitions to form a sturdy and stable stone layer, enabling the production of more cubic-shaped finished materials even when processing medium to high-hardness stones; the ‘stone-on-iron’ mode optimises the installation angle of the impact blocks to reduce energy loss and achieve a higher crushing rate.

2. Enhanced performance of key components:  

New designs for key components such as the rotor, bearing housing, and lower machine body: The rotor adopts a four-port design to increase material throughput and collision probability between materials; the bearing housing features a unique exhaust dust-proof device and sealing structure to prevent oil leakage from the lower bearing cover due to dust ingress; the lower machine body is modified from a ‘well’ structure to a ‘cross’ structure to prevent material blockage of the exhaust channel.

3. Intelligent control of thin oil lubrication:  

The thin oil lubrication and air cooling system, controlled by intelligent instruments, enables fully automatic lubrication control and adjustable lubrication temperature, providing better working conditions for bearings.  

4. Humanised design for easy maintenance:  

Standard hydraulic opening and closing facilitate maintenance of the impeller and bearing housing; a hydraulic jack is used to lift the feed hopper for easy maintenance; the guardrail height is reduced to avoid interference during feed hopper rotation.

Large-scale sand-making machines can easily crush, finely grind, and shape hard stones such as hard granite, river pebbles, quartzite, basalt, diabase, and gabbro. The produced finished sand has good quality, uniform particle size, and meets the requirements of high-grade construction and engineering projects, thereby enhancing construction quality. Additionally, compared to traditional equipment of the same power, the new sand-making machine has a 30% increase in output and operates stably. Wear parts have low consumption, and the cavity design is reasonable, reducing direct contact between materials and wear parts, significantly reducing wear on wear parts. The hydraulic cover opening device makes it more convenient to replace wear parts. This sand-making machine equipment is at the forefront of the industry in terms of lubrication, adopting an advanced lubrication system and hydraulic pump station. The special oil transmission system has excellent bearing transmission and cooling efficiency.

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