1. Thoroughly remove impurities to prevent hard objects from entering.

Stones, sand, nails, and metal shavings are the number one killers of ring die cracking and pressure roller breakage.

Use a front-end magnetic separator + vibrating screen for triple iron and stone removal; screen wood chips first to remove coarse, hard wood blocks and metal fasteners; clean the magnetic rollers every shift to remove iron filings.

2. Strictly control moisture content to 10%–15%.

Moisture > 16%: Material sticks to and clogs the die holes, exponentially increasing extrusion resistance, and causing bearings and gears to overheat under long-term high load; Moisture < 8%: Dry and hard raw materials increase friction, doubling the wear rate of the ring die and pressure rollers; Straw and bark have high sugar content, so uniform conditioning is essential to avoid uneven moisture levels.

3. Particle size matched to the die.

Uniform raw material size prevents large pieces from directly impacting the inner wall of the die holes; use a crusher matched to the ring die hole diameter to control the particle size at 3–8mm.

4. High-sugar raw materials must be washed after production.

Straw, bamboo shavings, and fruit wood residue are prone to hardening and clogging due to their high sugar content. Before leaving get off work, add a small amount of oily sawdust to the machine to fill the mold holes and prevent hardening.