SU1252028A1 - Casting mould - Google Patents

Description

The invention relates to foundry, namely, to the production of castings by casting in a chill mold, by injection molding and by other methods into detachable molds.

The aim of the invention is to improve the reliability of the operation of the mold. FIG. 1 shows a movable half-form; FIG. 2 is a section A-A in FIG. (closed form); figure 3 - section bb in figure 1; figure 4 is a section bb In figure 1; figure 5 is a section of GG in figure 1; Fig. 6 shows the assembly I in Fig. 1 after sealing the mold connector.

The casting mold consists of movable 1 and fixed 2 half-molds, on the surfaces of connector 3 of which cavity and castings are made, groove 5 in movable and groove 6 in fixed semi-molds close to the contour of the cavity from pouring, runner 7 and ventilator channel 8. Inside the cavity formed by the slots 5 and 6, an elastic tube 9 with liquid filler 10 is mounted, fixed in the movable half-form 1 with the help of glue 11.

In the movable mold 1, an ejector 12 is installed and a pressure chamber 13 is provided with a floating piston 14 having an adjustable stop 15 abutting the stationary mold 2, and with a floating piston 16 contacting the runner gates 7, channels 17 and 18 for filling and draining the liquid filler 10, respectively.

Foundry form works as follows.

After the semi-molds 1 and 2 come together and docked, the adjustable stop 13 of the floating piston 14 abuts the stationary half-form 2 and the floating piston 14 presses against the liquid filler 10 in the pressure chamber 13.

As a result, the pressure of the liquid filler 10 in the chamber 13 and the tubes 9 increases. This causes the elastic tubes 9 to expand and fill the entire volume of the slots 5 and 6 in the movable 1 and fixed 2 half-shapes. At the same time, the outer contour of the tube 9 blocks a possible gap between the half-molds 1 and 2 along their surface of the connector 3. The 1st piston 16, which is installed in the area of the gate run 7, floats into the runner run 7 in its original position before the start of pressing.

After the melt is poured into the pressing chamber and the pressing piston starts to move, the melt fills the gate run 7 and the cavity of the gap 4, displacing the air through the ventilation duct 8. At the same time, the melt does not flow into the gaps along the plane of the connector 3 of half-molds 1 and 2, 9 with filler 10 in grooves 5 and 6 are pre-suppressed and overlap the joints of the parts of the forms.

Then, the melt fed to the mold is pressed, i.e. A maximum pressure is applied to the melt, which is usually several hundred times the filling pressure of the mold. At this very moment, in the known methods of pouring under pressure, the melt penetrates as much as possible into the butt gaps of the parts of the mold and forms a precipitate.

The pressure on the melt is transferred to the pressure chamber 13 through the floating piston 16, which is installed in contact with the molten melt in the runner zone 7, where it receives the pressure of the melt.

As a result, the floating piston 16 is pressed into the pressure chamber 13, which leads to a corresponding increase in pressure in the elastic system of the tubes 9 ,. and they more closely cover the possible gaps at the junction of half-molds 1 and 2.

After solidification of the metal, mold halves 1 and 2 are moved apart, the adjustable stopper 15 is released from contact with the fixed iron mold 2 and under the action of the internal pressure in the system of tubes 9 and the pressure chamber 13 moves out from the fixed metal mold 1 to its initial position, which, in turn, leads to pressure drop in the system to the initial level.

Upon further disclosure of half-molds 1 and 2, the casting is removed from the cavity 4 by means of the ejector 12 and half-molds 1 and 2 and elastic tubes 9 with filler 10 are ready to repeat the casting cycle. The filling of the filler 10 in the proposed device is carried out through the channel 17, and the removal of the filler 10 from the system is carried out through the channel 18.

312520284

The application of the invention for semi-In cases of obtaining products without

castings and a device for its application. High pressure at dissolution allows to obtain from the melt or molded mass of the structure without waste, which greatly simplifies the devices, since

reduces the overall complexity of obtaining 5can refuse dopol and castings body piston.

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Editor A.Vorovich

Compiled by A.Kuznetsova

Tehred M. Khodanich Proofreader S. Shekmar

Order 4564/11 Circulation 757 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d. 4/5

and ...-- - - - - - - - --- ---. - - - - - - - - - - - - - - - - - - -

Production and Polygraphic Campaign, Uzhgorod, Project St., A

Claims (2)

1. A CASTING FORM containing half-molds and a device for sealing the plane of the half-mold connector, including elastic elements with liquid filler installed in grooves made on the butt · surfaces of the half-molds, characterized in that, in order to increase reliability in operation, it is equipped with a pressure chamber with a floating piston placed in one of the half-forms, while the elastic elements are made in the form of elastic tubes, the cavity of which is connected to the pressure chamber, and the floating piston is equipped with an adjustable stop interacting with the surface of the response half-form. 2. The mold according to π.1, characterized in that, in order to increase the reliability in operation when casting metals under pressure, the pressure chamber is equipped with an additional floating piston located in the zone of application of pressure on the metal. _t u c h o o u QO>