Many domestic cardboard or carton manufacturers have five-layer or seven-layer corrugated cardboard production lines, but the enterprises with these advanced equipments only account for a small part of the national enterprises, and the vast majority of carton manufacturers are affected by market, capital, and technology. With other restrictions, it was not possible to update the advanced equipment for a while, and still retain the single facer corrugated machine, and even use a single unit to produce cartons (cardboard). Therefore, how to further improve the cardboard quality produced by single facer corrugated machine and reduce production costs is a general concern of these carton manufacturers.
Most direct and effective way to reduce production costs of single facer corrugated machine
First, make full use of leftover materials. Now some companies, in order to reduce the waste of leftover materials, adopt the method of ordering specification paper. Of course, this method is desirable for stable carton specifications, few varieties, and large production batches of single batch varieties; but for companies with diverse carton specifications and small production batches, this method will cause greater Waste.
The general countermeasure is to purchase all base papers with a uniform width (1600mm). If a five-layer cardboard is produced, the longitudinal slitting specifications and the number of materials can be reasonably calculated according to the specifications of the cardboard, and the leftover materials can be used as splicing core paper.
For example, if the cardboard is 590mm wide and 1,000 sheets of five-layer cardboard are produced, then the inner paper can be cut 500 knives and cut into two pieces of 590mm and one piece of 400mm longitudinally. The core paper is cut 250 knives and cut into two pieces of 590mm and two pieces of 200mm longitudinally. When laminating, 400mm and 200mm are spliced into 500 core papers.
Another example: the cardboard is 700mm wide, and 1,000 sheets of five-layer cardboard are produced. Then, the inner paper can be cut 500 knives and cut into two pieces of 700mm and one piece of 180mm longitudinally. The core paper is cut 389 knives, of which 167 knives are longitudinally divided into two 700mm and one 180mm, and 222 knives are longitudinally cut into three 530mm. When laminating, 180mm and 530mm are combined into 666 core paper.
Note: Any size of cardboard can be fully utilized as long as the remaining material is above 10mm. Of course, the remaining material below 10mm can only be discarded. It is worth reminding that the splicing big or small heads must have 10mm exposed corrugation (when the single-sided machine is operated, the bottom paper and the two ends of the corrugated paper can be staggered by 10mm). When mounting glue, the big head and the small head must overlap by 10mm, and the overlapping part can only be within 10mm of the exposed corrugated part , and it can only be two pieces and one joint.
Try to stagger the indentation line of the flap when calculating. In this way, it will not expose the contact marks on the face paper, nor will it affect the vertical compressive strength of the cardboard. If it is a three-layer cardboard, the excess leftover material can be rewinded by manual rewinding, and then re-cut for splicing when the five-layer cardboard is produced.
Second, reduce the cost of adhesives. In the production of corrugated board with a single facer corrugated machine, the adhesive is the most critical. To reduce the cost of adhesives, first choose a lower cost starch adhesive. In the starch adhesive type, choose the adhesive with strong viscosity and small usage. Generally speaking, the cost of composite adhesives can be controlled at about three cents per square meter of five layers of cardboard.