Single-sided machined corrugated board

Many domestic cardboard or paperboard manufacturers have five- or seven-tier corrugated board production lines, but companies that own these advanced equipment account for only a small part of the country's enterprises. Most carton manufacturers are affected by the market and funds. With technical restrictions, it is impossible to update advanced equipment at one time, and still retain single-sided machines, even using a single unit to produce cartons (cardboard). Therefore, how to further improve the quality of single-sided machined paperboard and reduce production costs is a common concern for these carton manufacturers.

Let's discuss the most direct and effective way to reduce production costs.

First, make full use of corner materials. At present, some companies have adopted the method of ordering paper in order to reduce the waste of corners. Of course, this method is preferable for the stable carton size, small variety, and large batch production volume; but for companies with various carton sizes and small production volumes, such an approach will inevitably lead to greater waste. The general strategy is to purchase all raw materials with a uniform width (1600mm). If a five-layer cardboard is produced, the longitudinal slitting specifications and the amount of materials may be reasonably calculated according to the specifications of the cardboard, and the remaining material of the corners may be used as a splice core. To give a few examples:

Cardboard width 590mm, production of 1000 five-layer cardboard, then, the paper can be cut 500 knife, cut into two longitudinal 590mm  400mm. The core paper is cut into 250 blades and longitudinally slit into two 590mm and two 200mm. When gluing, 400mm and 200mm are spliced ​​into 500 pieces of sandwich.

The width of the paperboard is 700mm, and 1000 sheets of five-layer paperboard are produced. Then, 500 papers can be cut in the paper and cut into two 700mm sheets and 180mm sheets in the longitudinal direction. The core paper was slashed with 389 knives, in which 167 knives were longitudinally slit into two 700 mm and one 180 mm, and 222 knives were longitudinally slit into three 530 mm. When silicone is used, 180mm and 530mm are combined into 666 cores.

Note: Any size of cardboard, as long as more than 10mm can be fully utilized, of course, the remaining material is only 10mm below the waste. It is worth noting that the large or small heads of the splicing must have 10 mm of exposed tile (in the operation of a single-sided machine, the bottom and the ends of the cardboard can be staggered by 10 mm). In silicone, the large head and small head must overlap 10mm. The overlapping part can only be within 10mm of the shiva, and it can only be a two-piece joint. When calculating, try to stagger the indentation line. In this way, neither the exposed tissue marks nor the vertical compressive strength of the cardboard will be affected. If it is a three-layer paperboard, the excess scrap can be rewinded by manual rewinding, and then the flanging can be carried out when the five-layer cardboard is produced.

Second, reduce the cost of adhesives. With a single-sided machine to produce corrugated cardboard, adhesives are the most critical. To reduce the cost of adhesives, first choose the lower cost starch adhesive. In the type of starch adhesive, a strong adhesive and a small amount of adhesive are selected. In general, the cost of composite adhesives (commonly known as cooked glue) can be controlled at about three cents per square meter of five-layer cardboard.