The current mainstream black masterbatch production equipment is mainly twin-screw extruder. The common black masterbatch production process is: ingredients-mixing-extrusion-k-stripe-cooling-all-pellets-packing. Defects in the appearance of masterbatch products are a major problem in quality. The reasons that may cause this problem are the production process of masterbatch, the quality of raw materials of masterbatch, the production equipment of masterbatch, and the production environment.
Problem one: The black masterbatch is stripped. Lengths greater than 2 times the normal particles are considered long bars. The main causes are the pull-up bar or broken bar at the start, the direction of the bar is not straight, the pelletizer is worn or has a gap.
solution:
1. During normal production, adjust the direction of the bar entering the pelletizer and adjust the length of water.
2. The broken bars are strictly covered during production and need to be adjusted for processing.
3. Pay attention to the apricot cutting motor knife and replace the damaged moving knife in time.
4. Appropriate vibrating sieve should be used for the long strips that appear.
Problem two: The black masterbatch appears to be continuous. Two or more particles connected side by side are called lenticules. The main reasons are broken bars when pulling the bars, insufficient water length, etc.
solution:
1. When extruding the draw bar, use a guide bar with a suitable width to separate the connected bars.
2, adjust the appropriate cooling water length, that is, reduce the number of consecutive grains.
3, for the appearance of continuous particles can be sieved with a vibrating screen with a suitable mesh.