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 (1600 MM). 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 a 400MM. Core paper cut 250 knife, cut into two longitudinal 590MM two 200MM. When gluing, 400 MM and 200 MM 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 vertically. The core paper was cut 389 knives, of which 167 knives were longitudinally slit into two 700 MM ones and 180 MM, and 222 knives were longitudinally slit into three 530 MMs. When silicone is used, 180MM and 530MM are combined into 666 cores.
Note: Any size of cardboard, as long as the remaining material in more than 10MM can be fully utilized, of course, the remaining material in the 10MM only waste. It is worth reminding that the splicing head or head must have a 10 mm shingle (in the single-sided machine operation, the bottom paper can be staggered with the end of the paper by 10 MM). In silicone rubber, 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 the second and the 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.