Single-sided machine - vacuum trace

This situation can be seen on corrugated cardboard produced by a single-sided machine without guide jaws. This is a common problem with guide wire, but it is caused by too much vacuum on the corrugating roll with corrugated teeth. . Too much vacuum will over-adhere the core paper to the corrugating roll. As a result, the core paper is recessed and the glue roller cannot apply the paste to the top of the core paper tile. Like the effect of the guide wire on the quality of the paperboard, this situation will also reduce the side pressure strength of the paperboard and cause the paper box to break.