Paper tray is an environmentally friendly product under environmental protection and recycling. It has good shockproof, waterproof, dustproof, heat-resistant and thermal insulation properties. Paper tray products are divided into dry pressed paper trays and wet pressed paper trays. 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. It is generally aimed at some high-end or brand products. After the product is formed, when the product is still wet, it is directly heated at high temperature, Come out, so it is called wet pressing, so what are the common problems with the wet pressing paper tray process?
What are the common problems of the wet press paper support process:
1, the product is pressed black
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.
2. Hot press net fracturing
In the process of hot pressing, the omentum rupture is often encountered. 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 net, and manually pour the net into the shape of the product on the mold before pressing the net. If the intact omentum cannot be pressed, the crack in the net can be repaired with a spot welding machine.
3, the surface texture of 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 forming 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.
The above content is an introduction to the common problems of the wet press paper tray process. With the continuous enhancement of environmental protection awareness and the continuous progress of paper film technology, the small and medium products that used plastic foam as the inner packaging are basically used in the past. Paper trays are used instead, so the application range of paper trays can be said to be more and more extensive. The main products of wet pressed paper trays are children's toy paper trays, electronic product paper trays, airplane wing paper trays, auto parts paper trays, small airplane paper trays, socket paper trays, massage chair paper trays, and so on.
