Modern puzzles are mostly made of cardboard, so the cost is lower and the manufacturing process is simpler. The pattern of a jigsaw puzzle is a whole artistic print pasted on the surface of a cardboard before cutting, and the picture content can be enlarged photography, painting or other kinds of plane art.
The pasted cardboard will be sent to a special punching machine, which is equipped with a steel cutter set combined according to a predetermined pattern. After the cardboard is strongly stamped by the machine, it will be cut into pieces by the cutter group. This process is quite similar to the forming process of graphic biscuits, except that the impact force of jigsaw press is much higher.
For example, for a typical 1000 jigsaw puzzle, in order to make the tool set on the mold completely cut through the cardboard, the machine tool is required to generate a pressure of up to 700 tons when running. The mold (printing plate) of jigsaw puzzles is usually made of plywood. The modeler first draws or burns grooves on the template according to the assembly pattern of the jigsaw puzzle pieces, and then inserts the blades into the grooves one by one to assemble the tool set.
The surface of the cutter set should be covered with a layer of elastic material, usually foam rubber, which is used to eject the cardboard parts from the holes of the cutter set after printing.
Preservation method
After completion, the puzzle glue is evenly coated on the surface of the work, so that it penetrates into the gap to fix the whole puzzle, forming a smooth and bright protective film on the surface. After the puzzle glue is completely dried (about 1 ~ 2 hours), you can pick up the whole picture and mount it.
1. Paste installation method: first pour the glue on the front of the puzzle.
2. After evenly brushing, scrape it off with foam.
3. Refer to the pictures in the finished product drawing, and classify the puzzles according to colors and patterns. In order to avoid the loss of puzzles, they can be sorted and put in boxes or small boxes respectively.