How to avoid the production of corrugated paper waste

Where is the most likely waste generated? The answer is "Corrugated cardboard production line." By making simple adjustments to various parts of the production line, waste products can be reduced. Among these, cardboard warpage will lead to an increase in waste.

"Cardboard warpage" is a phenomenon that often occurs during the production process. It leads to a series of problems, such as: reduced production speed, increase of starch paste, steam and power consumption, and more machines produced by the downstream of the corrugated cardboard production line. Relevant problems, such as: the paper is soft, so that the die-cutting process cannot be performed; the “washing” paper cannot be printed without cracking; and the accuracy of printing and grooving reduces, resulting in a large increase in waste, making the carton The factory lost its due profits. How to make cardboard no longer warp, thus reducing the production of waste products?

Paper not registered

First of all, it should be noted whether the paper used is suitable for a corrugated cardboard production line. The base paper holder (and paper holder) must have several basic characteristics: including the ability to handle different widths (ie, 75 mm and 100 mm base paper rolls); ease of operation and ease of maintenance; whether all can be used up The paper does not damage the core of the paper roll so that the paper supplier cannot reuse it. The paper roll holder must be able to automatically register the base paper roll so that it is on the centerline of the corrugated board production line. The lack of edge registration is one of the main reasons for scrap. A chuck with the above characteristics can certainly save you money, because it guarantees that the expensive raw paper you buy will be used for production entirely, and even guarantee the supply from your base paper. Businesses get a small amount of money because the core of the paper roll that you use allows reuse. A good chuck has an average return on investment in 3 to 6 months. You can think of this part as a place to make money. This part is in line with the old saying - "Save money is money," that is, extra. Profit.

Web tension control throughout the entire machine

Another key part of the corrugated board production line is tension control rather than replacing the existing standard adjustable curling arm roller (located before each preheater). These parts are often subject to wear, and the lack of automatic registration of the original parts will cause the paper to wrinkle or fluffy due to non-uniform heating, thus allowing the downstream machinery to produce a large amount of waste. Standard accessories ensure that the web on the preheater has a loose or tight edge, but this will cause uneven removal of moisture and warpage of the board. The compact-edged paper web can remove more moisture than the loose-edged paper web. When paper with low moisture content (loose edged paper webs) is run on a double-sided machine, it tends to cause the paper web to warp at the edges of the drive, causing the paper web to warp upwards on the side of the operator. In the same way, the excessive moisture on the side of the operator at the double-sided machine will cause the opposite situation.

A perfect device for tension control throughout the machine's web should be able to "react" to the web, rather than trying to "control" the web. If a system tries to "control" the web, it can cause the web to register, resulting in a large increase in scrap. In addition, this equipment should be 100% mechanized, not pneumatically controlled or electronic, and easy to install, with a small amount of work during outage maintenance. The most important thing is that the web tension system should have a 360-degree error correction function, otherwise it will be limited by the location and cannot work effectively. A good system will eliminate the paper web tension problem, improve board quality, reduce board warping and delamination, and increase the production speed of corrugated board production lines. The return on investment for a good web tension control system should be 3 to 6 months.

Reproduced from: China Corrugated Machinery Equipment Network