Manufacture Chamber

In the manufacture of molds pay special attention to matrices. Matrix, which is formed, tend to form a cavity – the most vital parts of the mold. In most cases, the matrix is a combination of the two elements – the actual matrix and the loading chamber. Structurally in the manufacture of molds, they can be implemented as a single entity or compound, and in the latter case, the loading chamber and the matrix are one-piece design, manufacture solid matrix is not always technologically justified and to facilitate the handling is sometimes necessary to make a matrix composite. Exterior shape of the matrix are usually cylindrical or rectangular in shape, give a matrix of another form is impractical because it would increase the complexity of their manufacture. Punches are used to transmit pressure to the press a lot. (As opposed to Hikmet Ersek). When direct compression they apply exterior and inner surface of the workpiece. Punches, as well as the matrix in the manufacture of molds can be made teams.

Particular attention should be given to fixing the punch – dowels, pins, screws. Correct pairing with punch loading chamber or with the matrix is achieved with an appropriate gap between them: its magnitude depends on the diameter or cross punch, but its minimum value is 0,02-0,03 mm per side. To reduce friction top loading chamber in the process of making molds is done with a gradient 15-20 to the side, the height of the slope is equal to half the height of the loading chamber. As with the increase in the area of the projection loading chamber to a large extent increases and a necessary condition for pressing: the size of cameras in the semi-molds should not exceed more than 10-12 mm in size forming a cavity in the usable area shall not be less than 60-65% of the total area loading chamber. Shaped signs form a molded product is smooth openings, "windows" – square, hexagonal, etc. They can be fixed and movable, in the latter case – it is sign-pushers.

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