SU1419793A1 - Pulsed head for compacting casting moulds - Google Patents

Abstract

The invention relates to foundry. The purpose of the invention is to expand technological capabilities and reduce the consumption of compressed air. In the proposed pulse head, the valve is made in the form of a cylinder 1 1 and a two-stage piston 8 with through vertical channels 9 connecting the sub-piston space with the working cavity 3. The lower perforated plate 7 provides a locking device 13, the elastic element 12 of which is connected to the pressure source 15. 1 hp f-ly ,. 4 il.

Description

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The invention relates to foundry and can be used to compact casting molds and cores.

The aim of the invention is to expand the technological capabilities and reduce air flow.

Figure 1 shows the proposed pulse head with the outlet closed; figure 2 - the same, with an open outlet; Fig. 3 shows the node I in Fig. 2 (the locking device, the initial position); figure 4 - node I in figure 1 (locking device, operating position).

The pulse head comprises a housing 1 with a lid 2 overlapping the working cavity 3 for compressed air, an outlet 4, passing into the cavity 5 of the dissector 6 connected to the lower perforated plate 7. The piston 8 with through channels 9 of valve 10 is mounted in the cylinder 11 in the lowest position. In the channel 12 of the lower perforated plate 7, a shut-off device 13 is installed. Air under pressure is supplied to the working cavity 3 through the inlet port 14. Through a conduit 15, air or pressure under pressure is supplied to the stopping device 13. 13. the locking rings 17, two locking rings 18 and the elastic element 19.

Pulse head works as follows.

Air or liquid enters through the conduit 15 to the locking device 13 to a predetermined pressure, under the action of which the elastic element 19 closes the channel 12 of the lower perforated plate 7. Then the compressed air enters the cavity 3 of the impulse head to a predetermined pressure. In this case, compressed air enters both in cavities 3 and 5, and in the piston chamber of valve 10 through openings 9 of piston 8. The area (F,) of the lower part of piston 8 is larger than the area (F) of the upper part, therefore when supplying compressed air to the pulse head the piston B moves from the lowermost position to the uppermost one and closes the outlet 4. After that, the pressure of air or liquid is released from the locking device 13, as a result of which

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The rod 8 is moved to the lowest position, the outlet 4 is opened and the compressed air is distributed in the piston space of the valve 10 and the additional cavity 5, from where it enters the space above the mixture, which is in a flask (not shown), and seals it. At the time of the end of the seal, air or liquid under pressure is supplied to the shut-off device 13, the elastic element 19 of which closes the channel 12. At the same time, the remaining compressed air from the working 3 and additional 5 cavities enter the piston chamber of the valve 10 through the holes 9, under the action of which the piston 8 Returning to the extreme upper position, it closes off the outlet 4 and cuts off part of the remaining air in the working cavity 3 of the pulse head, which will then be used in the subsequent test. To seal the next flask, the cycle is repeated.

The application of the proposed device allows to expand the technological capabilities of the pulse head. upon receipt of a wide range of castings due to the increase in the reliability of its operation, simplification and acceleration of the changeover process. The ability to close the valve while achieving the desired distribution of mixture density by volume of the mold at any stage of compaction (during or at the end of compaction) reduces the flow rate of compressed air.

Claims (2)

1. A pulse head for compacting the casting molds, comprising a housing with a working cavity and an outlet opening, shut off by a valve in a kind of cylinder open at the top with a piston, under which the cut is installed; Tel with a lower perforated plate that forms an additional cavity with the body, in order to expand technological capabilities and reduce the consumption of compressed air, the head is equipped with a locking device located in the lower perforated plate under the piston, which is made in two steps with through vertical channels . 314197934 2. The impulse head according to claim 1, about t-ki, on the side surface of which is characterized by the fact that a hollow elastic element is bolted, the booster device is made in the form of a sleeve with a pressure source; /