Rock-on-rock or rock-on-anvil operation, high cubic content and controllable fines — the core machine for manufactured sand and aggregate shaping.
VSI / VSIS / SCB / PCKW Series Sand Maker
The VSI-950 belongs to the Sand Making Machine from New Shanbao and works on the vertical-shaft impact principle. Material enters a high-speed rotor from the centre or through cascade ports, is accelerated to 60–80 m/s and thrown out to strike either a rock lining (rock-on-rock) or wear-resistant anvils (rock-on-anvil). Because breakage follows natural fractures, the product is near-cubic with a continuous gradation.
This model is supplied with motor and electrical control, with a motor power of 2×160kW. It is widely used in manufactured-sand plants, aggregate shaping, cement and wear-material production, and is the key machine for replacing natural sand and upgrading aggregate quality.
What makes a VSI distinctive is the ability to control the fineness modulus and fines content by adjusting rotor speed, feed arrangement and the cascade ratio. That is why one machine can serve both as a sand maker and as a shaper, often doing both jobs in a single aggregate plant.
The table below lists the published specifications for this model. Contact us for the full datasheet, drawings or custom configurations.
| Parameter | Value |
|---|---|
| Max. Feed Size | 中心进料 mm |
| Throughput | 160-260 t/h |
| Rotor Speed | 82/73/57 r/min |
| Application | 制砂 |
| Motor Power | 2×160kW |
| Weight | 14.9 t |
Note: specifications are subject to change; the factory datasheet prevails. Capacity varies with material hardness, size and moisture — tell us your actual conditions for accurate sizing.
Feed entering a VSI splits into two streams: one passes through the rotor centre, is spun up by the rotor and accelerated to 60–80 m/s by the wear tips; the other falls through the cascade ports around the rotor. The accelerated material strikes the falling stream violently, and particles also grind against each other and against the wear-resistant lining.
The broken material falls onto a screen plate at the bottom; the finished fraction leaves the machine and oversize returns to the rotor. Adjusting rotor speed changes impact energy and therefore product fineness and output; raising the cascade ratio increases particle-on-particle impact and reduces wear-part consumption.
Rock-on-rock builds a lining from the material itself: low wear-part consumption and low running cost, but a slightly lower reduction ratio — good for abrasive feed and for shaping duty. Rock-on-anvil fits wear-resistant anvils in the chamber: more direct impact, higher reduction ratio and a finer product, but faster anvil wear — good for medium-abrasive feed and sand making. Many plants combine both: a coarse chamber for shaping and a fine chamber for sand.
Not with a single machine. A VSI will reduce material below 5 mm, but the fraction below 0.15 mm typically runs 10–25% and cannot reach 100% passing. If the process really needs 100% below 0.15 mm, add a vertical or ball mill with an air classifier after the VSI to do the milling and classification.
The main wear parts are the wear tips, distributor plate, top and bottom wear plates and guide plates. In rock-on-rock mode tips typically last 200–400 hours; in rock-on-anvil mode anvils run about 150–300 hours, depending on abrasiveness and speed. Tips can be indexed through four positions, and rotating them on a schedule noticeably lowers cost per tonne.
Tell us your material type, feed size and target capacity — we will come back within 24 hours with a configuration proposal and factory-direct quotation.