​How do you change the scraper of the Hot melt adhesive coating machine?

How do you change the scraper of the Hot melt adhesive coating machine? 

Scraper for cleaning waste: The scraper blade of the Hot melt adhesive coating machine is made of steel, and the position of the knife edge and the coating roller should be adjusted to prevent damage to the coating. Hot melt adhesive coating machine comma roller, servo motor knife, bearing for the low position, comma roller and coating roller pad between the isolation to avoid touching, loosen all fixed parts, manual adjustment knife to prevent the roller from contact after removal. 

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