Mould – a working tool presser. In it occur the necessary transformation of the material and product design. From a stable and committed work of mold depends largely on the quality of the finished products. Manufacture of molds made for each part separately, due to nonuniversal this tool. Particular attention is paid to design the loading chamber – general or individual for each nest mold. The most widespread are closed mold (otherwise called the mold with overflow).
Loading chamber they have located over the matrix (as in closed molds), but the size of the camera Plan a bit more than the size of the matrix. In the process of making molds of this design in place of the transition from matrix to the loading platform formed by a horizontal ledge. The same bench also has a punch in the place transition from the decoration to the trailing side. These ledges at closing form the squeezing welt. Excess press material (rag) by forcing welt can flow from the matrix into the gap between the walls of the closing of the punch and loading chamber. He is always horizontal, can be easily removed from the product, as in the area of squeezing welt it's pretty thin.
Products, otpressovannye in molds with overflow, we obtain the exact height. Therefore, Mold often is made with a flow of mnogognezdovymi. Some disadvantage of this type of mold is a slight increase in the area of compression at the expense of squeezing welt and thereby worsening the use of force from the press. All parts that are manufactured for the molds can be divided into two groups: 1) technological purpose (work detail), directly in contact with the compressible material and involved in varying degrees, moldings, and 2) a constructive purpose, engaging in mutual fixation parts mold, heating, its connection with the press, dehiscence of the mold, providing installation, etc. In Currently, almost all the details, but direct contact with the compacted mass, normalized or standardized.