SU1250390A1 - Caisson mould - Google Patents

Description

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The invention relates to foundry, and to design. die casting molds, and is intended primarily for large and medium casting engineering parts.

The aim of the invention is to improve the cleaning performance of the caisson form from the filler.

Figure 1 shows schematically a caisson form, a vertical section; figure 2 is the same, the view in the plan; on fig.Z - section aa in figure 1; figure 4 - section bb in figure 1; figure 5 is a section bb In figure 1.

The caisson form contains the upper 1 and lower 2 half-molds installed in the caisson 3 in a suspended state with an installation clearance of above the bottom plate 4.

The bottom | 1I plate 4 is installed elastically on the oscillation excitation chamber 5; insulated from the working space of the caisson 3 and placed on the perimeter of the bottom plate 4 around the tank 6 for receiving the spent mixture.

The amplitude of the elastic oscillations, the chamber does not exceed the value of VcT a but the night gap (5 between the bottom plate; that 4 and the walls of the lower half-form 2,

The oscillation excitation chamber 5 is made between a movable U-shaped frame 7 and elements of a fixed assembly base consisting of an extension 8 connected to a fixed U-shaped frame 9, between which the elastic shell 10 is fixed with its thickened edges.

The movable U-shaped frame 7 is rigidly connected to the bottom plate 4, and the fixed U-shaped frame 9 is mounted on the pedestals 11.

Elastic shell 10 is composed of. of four isolated sections of equal volume — two longitudinal 12 and two transverse sections 13, each of which is associated with an oscillation pathogen (hamstring) 14, input channels 15 and output channels 16.

The output channel 15 is provided with a nozzle insert 17 fixed in a fixed U-shaped frame 9 and a dilated expanding neck of the nozzle in the direction of the narrowed entrance neck of the excitation chamber 5;

The spool 18 of the excitation exciter 14 rotates around a vertical axis from the actuator 19 with smoothly

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revolving speed. In the rotating spool 18 there is a horizontal kangsh 20 connected to a vertical channel 21, which, in turn, communicates with two mutually perpendicular channels 22 and 23 of the spool located at different levels (see Fig. 3 n).

Channel 20. During rotation of the spool 18, the channel system is alternately connected to supply lines 24 and outlet 25 of compressed air, respectively, through receivers 26 and 27.

Removal of the filler is carried out from the tank 6 for receiving the waste mixture into the ejector pipe 28, from which it is discharged by pneumatic conveying.

The device works as follows.

In the initial position, the bottom caisson of the half-mold 2 with the half-form 1 installed on it is suspended from the walls of the caisson 3. So that the bottom plate 4 is separated from the walls of the half-form to distance f.

After the casting in the form of I, 2 is solidified, compressed air is supplied to the spool 18 of the exciter i 14 oscillations through a freshly running main 24 through the rectifier 26 when the spool 18 is installed on the compressed air inlet. Compressed air passes through the horizontal channel 20 into the vertical channel 21 and enters the channels 22 and 23 to simultaneously fill the longitudinal and transverse chambers 12 and 13 through the inlet channels 15.

The output of compressed air from the elastic shells (chambers) is blocked by a spool 18.

When filling the excitation chamber 5 with air, the elastic chamber 10 fills the movable body 7 together with the bottom plate 4 along the guides until the installation gap 5 is chosen between the bottom plate and the bottom half-form.

The rotational drive 19 is turned on, turning the spool 18 to an angle of 90 to release compressed air from the longitudinal 12 and transverse 13 elastic chambers, which until now have been blocked. The elastic chambers through channel 16 are connected to the channels of the spool 22 to 23 through line 25 and rossiver 27 with a compressed air outlet to the air collector.

The spool continues to rotate, re-adjusts the compressed air supply to the casing at 180 °, and discharges compressed air at a 270 ° rotation, providing the amplitude of the elastic casing oscillation in the size of the gap c.

Thus, rotating, the spool 18 acts on the air in the electric chamber 10, connecting the latter in turn with the air supply and exhaust, i.e. the spool becomes a generator of elastic vibrations of the elastic shell. These vibrations affect the bottom plate 4 of the mold. Donna plate with the top 1 and bottom 2 half-forms enters into resonance when exposed to vibrations on the filler

there is its rapid destruction, and 20 destroyed mixture of caisson.

the ready casting is lowered gradually to the bottom. As the connections are broken, the mass is requested through the bottom openings into the bunker 6, and from it into the ejector tube 28 it is discharged by pneumatic transport, the casting is easily removed from the bottom part by a crane.

By adjusting the rotational speed of the spool, it is possible to adjust the amplitude of oscillation and the rate of destruction of the filler.

The present invention allows to improve the cleaning performance of the caisson form from the filler as a result of the fact that the installation simultaneously operates in the mode of excitation of vibrations and in the mode of removal

FIG. 2

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Compiled by V. Sazonov. Tehred-L.Serdnzhova Proofreader A.Zimokosov

Order A362 / P

Circulation 757 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 3035 Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod GulGpro1ktn1 7

Claims (1)

CESSON FORM, comprising: an upper and lower half-mold, a bottom plate mounted on an elastic base, a container for receiving the worked-out mixture, a vibration excitation chamber and a vibration exciter made in the form of a rotary drive spool, distinguished by the fact that , in order to improve the cleaning performance of the caisson mold from the filler, the vibration excitation chamber is made in the form of four isolated elastic chambers of equal volume, placed along the perimeter of the bottom plate, with each chamber connected by a central ··. · Input and output channels with the oscillations exciter, the lower mold g is placed in the caisson in a suspended state, and the base plate ustanovle- 1B but with clearance relative to the bottom, the mold halves. SU, 1250390 fie1 1 1250390 2