SU742132A2 - Device for forming voids in articles - Google Patents

Description

The invention relates to the field of production of building materials and can be used on preparatory industries for manufacturing, for example, silicate and ceramic bricks. By bus No. 656845, a device for forming voids in a product, containing an elastic shell fixed on a stamp with profiled hollow protrusions, mounted in a stamp with the possibility of reciprocating movement of a piston carrying a number of punches acting on its head. resilient pressure cores placed in the cavity of the shell; moreover, a pressure plate with an elastic carpet is attached to the base of the elastic shell. A disadvantage of the known device is that when the product is molded as a result of deformation of the lower part of the cores, they compress the elastic sheath in the holes of the upper and pressing plates, experiencing resistance to movement, which also causes additional wear on the contacting surfaces. The aim of the invention is to reduce the resistance of movement of cores. This goal is achieved by the fact that in the device for the formation of voids in the product containing an elastic sheath fixed on the stamp with shaped hollow protrusions, mounted; in the rod with the possibility of reciprocating movement of the piston, bearing on its head a number of punches acting on the shell of the elastic pressing cores placed in the cavity of protrusions, moreover, the pressing plate with an elastic mat is attached to the base of the elastic shell, the part of the core under the press plate is made of an elastic material with a higher hardness than the part of the core located above the pressing plate. The drawing shows the described device. The device consists of a hollow box 1, in which a piston 2 with punches 3 is mounted. A clamp 4 is installed in the piston, a plate 5 is fixed above the box, an elastic shell with hollow shells is installed above the plate

The profile protrusions 6 and in the protrusions of the elastic shell above the punches there are elastic cores 7 consisting of two parts: the bottom (A) with greater hardness and the top (B) made of a less solid material. A pressing plate 8 is attached to the base of the elastic shell, and is closed on top with a corrugated carpet 9 of elastic material.

The device works as follows.

To load the mixture, the device in the mold is lowered to its lowest position. Load the mixture. The pressing piston of the press pushes piston 2 with punches .3, the latter transmit forces to elastic cores 7, which, moving up, press the layer of the mixture over themselves. At this time, the upper, less hard part (B) of the core is deformed, compacting the mixture above and between the projections of the elastic shell. When the pressing piston of the press raises the piston 2 with the punches 3 to the level of the bottom of the hollow box 1, the further movement of the piston 2 and the box 1 occurs together. The plate 5 transmits pressure from the box 1 through the base of the elastic shells 6, the pressing plate 8 and the elastic mat 9 to the bottom of the molded article.

At the same time both parts of elastic cores move, the upper part (B) is deformed, decreasing in height and increasing in thickness, additionally seals the mixture between the projections of the elastic shell.

When the upper position is reached, the pressing piston of the press is lowered to the initial lower position. Together with the pressing piston, the press falls down under the pressure of deformed elastic cores and noptueHb 2 with punches 3 until it touches retainer 4 to the lower border of the groove of the hollow box 1.

The ejection of the finished product is made lounging. press mechanism under the bottom of the hollow box 1.

Claims (1)

Invention Formula Device for the formation of voids in the product according to ed. No. 656845, characterized in that, in order to reduce the resistance to movement of the cores, the elastic pressing cores are made of composite, with the part of the core under the pressing plate made of elastic material with a higher hardness than the part of the core located above the pressing plate.