What to Do When a Sand Making Machine Becomes Clogged

During the sand production process, we occasionally encounter minor issues with our sand-making equipment. Resolving these problems ourselves can save significant time in production, eliminating the need to wait for technical personnel. Material blockage is a common issue we face when operating the equipment. To address it effectively, we must first identify the causes:

1. Excessive Feed Rate at the Inlet

When an excessive amount of material arrives before the preceding batch is fully crushed, and more material is immediately fed in, it causes a blockage at the inlet. To address this, adjust the conveyor belt's feed rate and speed to match the crushing capacity of the sand making machine.

2. Raw material size is too large

The inlet of a sand making machine is typically designed for material under 5 cm. If the raw material is around 5-6 cm, it may get stuck at the inlet or fail to pass through. In such cases, it may be necessary to install a primary crusher upstream to pre-crush the material before feeding into the sand maker.

3. Improper discharge adjustment

This issue mirrors the problem of excessive feed volume at the inlet. When crushed material isn't promptly discharged, subsequent feed entering the crushing chamber can cause blockages. To resolve this, adjust the discharge speed appropriately based on the sand maker's capacity.

4. Excessive Material Moisture Content

High-moisture materials may exhibit viscosity after crushing. Small particles can stick together due to this viscosity, causing blockages between the crushing chamber and wear parts. When moisture content is too high, pre-screening and dewatering the material before crushing can prevent blockages.

5. Poor Equipment Quality

Incorrect selection of sand making machine models can also cause blockages during production. Therefore, consult technical personnel during selection, providing details about the material to be crushed and desired particle size to choose the appropriate machine model. The booming sand production industry has spurred rapid growth in the sand-making machine sector. With numerous manufacturers now producing sand-making machines, output capacities vary significantly. Therefore, exercise extreme caution when selecting equipment. Communicate your specific requirements promptly with technical personnel to purchase a sand-making machine that meets your needs.

6. Production Line Equipment Coordination Issues

For instance, if the conveyor's throughput exceeds the crusher's capacity, mismatched throughput rates cause uncrushed material to accumulate while fresh material rapidly enters the crusher. This leads to delayed crushing and subsequent blockages.

7. Severe Wear of Wear Parts

Severe wear of the sand-making machine's own wear parts is another cause of blockages. Since the machine primarily relies on hammers for crushing, and hammers are among the wear parts, if they are not replaced promptly after prolonged use, encountering harder materials will prevent complete crushing. This results in large chunks of material not being fully broken down, hindering timely discharge. When new material enters under these conditions, blockages occur.

8. Insufficient Voltage

Unstable voltage causes uneven and intermittent feeding into the sand making machine. When feeding exceeds discharge rates, blockages form in the crushing chamber and discharge port. Crushed products cannot be expelled promptly while new material continuously enters the equipment, ultimately causing blockages. Severe cases may result in equipment shutdown due to overload.

9. Excessively Hard or Large Material Particles

When materials are excessively hard or have overly large particle sizes, and the sand-making machine's crushing force is inadequate, the material may not be properly crushed. Subsequent material then forces its way into the crusher, preventing internal material from being discharged and potentially causing blockages.

Sand Making Machine Blockage Prevention Measures:

1. Monitor the ammeter needle during feeding. Generally, excessive feed volume causes significant needle deflection. Prolonged overload risks motor burnout. Immediately reduce or close the feed gate when this occurs. Alternatively, install a feeder to control feed rate and prevent blockages.

2. Mismatched conveying equipment can weaken or eliminate airflow in discharge pipelines, causing blockages. Therefore, before designing a sand-making production line, avoid mismatched output capacities between equipment to prevent blockages.

3. During sand-making machine operation, regularly replace broken or severely aged hammer plates and inspect screens. If screens show signs of aging, clogged or torn mesh, replace them promptly. The moisture content of crushed materials should be below 14%. These measures can effectively reduce blockages and enhance equipment efficiency.

We hope the above points provide useful guidance for addressing sand-making machine issues. OCP Heavy Industry is a specialized joint-stock enterprise integrating R&D, manufacturing, sales, and after-sales service, boasting a high level of professional expertise. We welcome visits to OCP Heavy Industry for on-site inspections.