SU99900A1 - Adaptation (valve) to the stamp for the manufacture of products from ceramic and similar plastic masses - Google Patents

Description

The supply of compressed air to the surfaces of the contact of the punch with the molded product to separate the latter is difficult because the air supply valve cannot move in the direction of the cavity of the punch, as this is hampered by the molded and located in the mold.

The proposed device (valve) eliminates this drawback. For this purpose, a rifle equipped with coaxially arranged shanks is mounted in its punch or die. Through the upper one, which is made hollow, air is supplied to the piston torp, as a result of which the piston receives a movement, in which the lower shank opens the compressed air to the surfaces of the contact of the die with the molded product.

FIG. 1 schematically shows a longitudinal section of the proposed device; in fig. 2 shows a section along I-I “and FIG. one; “And FIG. 3- another form of the proposed fixture.

A stamp for ceramic, etc. products is fitted with a liopnyc / fixture (valve), the end of which is flush with the working surface of the stamp. In the housing 1, a piston 2 having two shanks, an upper shank 3 and a lower shank 4, can move. The upper shank 3 is made hollow and serves to supply compressed air, as shown by art. 1, to the end 5 of the piston 2. The piston is under the influence of the spring 6. To hold the piston in a stationary position at the beginning of the compression of the mass with a punch, it is provided with a spring latch 7.

At the end of the stamping process, when the mass is compressed and the product is molded, compressed air is supplied through the hollow shank 3, which pushes the latch 7 and this releases the piston 2. Then the compressed air enters through the lateral flanges 5 and moves the piston upwards, wherein the LOWER shank 4 is withdrawn from the opening of the housing 1 and

compressed air gains access to the contact surfaces of the molded product with the dies. This prevents the product from being pressed into the die and, as a result, the product is easily separated from it.

The proposed seal is also used to automatically remove air from the die band during the initial pressing period. For this, a form for making an adaptation is provided, according to which a sleeve 8 (fig. 3) is freely placed on the lower shank 4 of the piston 2, and the housing / is provided with openings I communicate with the atmosphere.

At the beginning of punching when the mass is compressed, the air rushes out of the punch, lifts the sleeve 8 and moves it along the lower tailing 4 until it stops at the end 5 of the piston 2 held in a stationary state by the latch 7. At the same time, the sleeve 8 opens the holes 9 and the air from the cavity of the stamp goes into the atmosphere.

Subject invention

Claims (3)

1. A fixture (valve) to a stem for manufacturing products from ceramic and similar plastic masses, intended to supply compressed air to the surfaces of the contact of the die with the molded product to separate the latter, characterized in that a piston fitted coaxially is mounted in the punch or die vertically arranged shanks, of which the upper shank is hollow and serves to supply compressed air to the piston face and to let the latter move, in which the lower shank opens zhatomu air access to the surfaces of contact with the die molded article. 2. The form of making the device according to item I, characterized in that, in order to automatically remove air from the die cavity during the initial pressing period, on the lower shank of the piston is loosely worn, opening when axially moved by the air of the die cavity, the holes communicating with the atmosphere. 3. The form of making the device according to claim I, characterized in that in order to keep the piston in a stationary state during the period of removal of air from the die cavity (pressing), the piston is provided with a spring-loaded latch removed by the impact of the latter during the period of the compressed air supply.