Creaser slotter-creasing slotting machine for corrugated box

Creaser slotter-creasing slotting machine for corrugated box

The creaser-slotter (creading-slotting machine), also known as the scorer-slotter, performs many simple tasks essential to the box making process. It creases and slots the blank, as the name implies. However, it also trims when needed and performs critical tasks for making the manufacturer’s joint. In order to complete all of these operations, many different parts make up this section, including two creasing shafts, two slotter shafts, and two pull rollers.

The creasing operation creates creases in the box to allow for folding later in the process. This procedure is performed by a male and female creaser. The male creaser contains the creasing heads and is responsible for making the creases on the corrugated board. It can be either on the top or bottom shaft. The most common creasers have three creasing heads per shaft. The top creaser is adjustable in order to make a harsher or lighter crease depending on the flute of the board running through the machine . For corrugated containers, scoring is always done on the inside of the box. When erecting a shipping container, the walls of the box are folded toward the groove.

Slotting, the next operation in the creaser-slotter, is necessary in order to fold the flaps of the box without them interfering with one another. Another pair of shafts in the creaser-slotter performs the slotting operation. This pair of shafts contains the slotter knives and the glue lap cutter. The slotting heads have two blades attached. Each blade cuts one side of the slot. Slot widths are commonly between 1/4 and 3/8 inch. The end of the slotter knife has a raised blade which cuts and detaches the third side of the slot. Slotting is always performed in a top down process for easy scrap removal. Scrap may also be accumulated from trimmings and cutting the glue lap. Pneumatical and mechanical scrap removal systems are both common. Blowing air downward at an angle along with gravity removes the scrap quickly. The scrap is generally taken to a recycling pile via a conveyor belt.

Crushing is another essential operation that occurs in the creaser-slotter section. The outside edge of the blank that the manufacturer’s joint is adhered or stitched to is crushed. Crushing of the box in this specific area is essential in order to make the box thickness more uniform throughout. If crushing does not take place, the portion of the box where the manufacturer’s joint is attached will be twice as thick as the rest of the corrugated box. Although crushing cannot make the thickness completely uniform, it does compensate.

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