Single-sided machining of corrugated cardboard

Single-sided machining of corrugated cardboard

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Many domestic cardboard or carton manufacturers have five or seven layers of corrugated board production lines, but those with these advanced equipments only account for a small part of the national enterprises, and most of the carton manufacturers are subject to market, capital, Due to technical constraints, it is not possible to update advanced equipment at the moment, still retaining single-sided machines, and even using a single unit to produce cartons (cardboard). Therefore, how to further improve the quality of single-sided machined cardboard and reduce production costs is a common concern of these carton manufacturers.

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

First, make full use of the corners. Now some companies, in order to reduce the waste of corners, take the method of ordering specification paper. Of course, this method is preferable for the stable specifications of the carton, the small variety, and the large batch size of the batch; however, for enterprises with various carton specifications and small production batches, this method will cause a larger waste. The general countermeasure is to purchase a uniform width (1600mm) base paper. If five-layer cardboard is produced, the longitudinal slitting specification and the amount of material can be reasonably calculated according to the specifications of the cardboard, and the residual material of the corner can be used as the splicing core. To name a few:

The cardboard is 590mm wide and produces 1000 sheets of five-layer cardboard. Then, the paper can be cut into 500 knives and cut into two 590mm   400mm. The core paper was cut into 250 knives and cut longitudinally into two 590 mm  two 200 mm. When the glue is used, 400mm and 200mm are spliced into 500 sheets.

The paperboard is 700mm wide and produces 1000 sheets of five-layer cardboard. Then, the paper can be cut into 500 knives and cut into two pieces of 700mm and 180mm. The core paper is cut into 389 knives, of which 167 knives are longitudinally cut into two pieces of 700 mm and one piece of 180 mm, and the 222 knives are longitudinally cut into three pieces of 530 mm. When squeezing the glue, 180mm and 530mm are spliced into 666 sheets.

Note: Any type of cardboard can be fully utilized as long as the remaining material is above 10mm. Of course, the remaining material is only wasted below 10mm. It is worth reminding that the spliced big or small head must have a 10mm exposed tile (when the single-sided machine is operated, the bottom paper and the paper paper can be staggered by 10mm). In the silicone, the big head and the small head must overlap 10mm, the overlapping part can only be within 10mm of the exposed tile, and only two joints and one joint. Try to stagger the flap indentation line when calculating. In this way, neither the exposed paper nor the vertical compressive strength of the paperboard is affected. In the case of three-layer cardboard, the excess scrap can be re-rolled by manual rewinding and then re-cut for splicing when producing five-ply paperboard.

Second, reduce the cost of the adhesive. The production of corrugated cardboard with a single-sided machine is the most critical. To reduce the cost of the adhesive, first choose a lower cost starch binder. Further, among the types of starch binders, a binder having a strong viscosity and a small amount of use is selected. In general, the cost of composite adhesives (commonly known as cooked rubber) can be controlled at about three cents per square meter of five-layer cardboard.