In daily life, the use of paper is indispensable for everyone, because paper is a relatively soft material, with good shock resistance, moisture resistance and antistatic functions. The material of the wet pressed paper tray is bagasse. The product is environmentally friendly and can reach the food grade. It has a beautiful appearance. After the product is formed, when the product is still wet, it is directly heated at high temperature and the product comes out, so it is called wet pressing.
1. Surface printing on the paper support:
There are stripes on the surface of wet pressed paper support products after hot pressing. These lines are mainly caused by uneven slurry absorption of the molding die. The solution is to use a smaller drill bit for drilling or increase the hot pressing. Machine pressure, which can effectively improve the line phenomenon. If feasible, you can also add a few more layers of mesh to the forming mold, so that the vacuum force at the punching area can be well dispersed.
2. The product is blackened:
Paper support black is a very common problem, mainly because the smaller part of the product structure is easy to slurp during molding, so the thickness is larger than other parts, and it is pressed too tightly and blacked during hot pressing. It may also be caused by too much pressure of the hot press itself and too long hot pressing time. For the first case, you only need to use a file or properly remove the corresponding mold on the machine tool. In the second case, you need to adjust the pressure and time of the hot press at the same time to make the machine reach a balance point.
3, hot press net fracturing:
In the process of hot pressing, the omentum is often ruptured. If a fracturing net is attached to the mold, and then the product is put on the product for hot pressing, the pressed paper support product will leave a trace, which will affect Exterior. The solution is to change to a softer mesh, and manually pour the mesh into the shape of the product on the mold before pressing the mesh. If the intact omentum cannot be pressed, the cracks in the mesh can be patched with a spot welding machine.
The above content is an introduction to the common problems and solutions of the wet pressing paper tray process. The primary function of the paper tray is to contain and protect the packaging product. The paper tray product should be able to reliably contain the packaged product specified by the packaging, so that the packaged product It is not damaged during transportation, loading and unloading, and use, and it meets the requirements of strength, rigidity and stability. The application areas of paper trays include electronics, electrical appliances, communication equipment, computer accessories, glass, ceramics, lighting, handicrafts, cosmetics, health products, wine, fruits, eggs, etc.
