SU1574347A1 - Machine for producing cores - Google Patents

Abstract

The invention relates to a foundry industry, in particular to machines used to make casting cores from sand mixtures compacted under the direct influence of compressed air and set in a tooling. The purpose of the invention is to increase the versatility, improve the control of the compaction of the mixture in the process tank, increase productivity. The machine contains two working tanks, each of which has a body, inside of which there is an air-permeable shell, a pneumatic outlet with a gate, a blower valve with a valve chamber and an inflatable plate. The working tanks are installed with the possibility of their inclination relative to the vertical axis at an angle of 60 ° and moving relative to each other in a horizontal plane. Gates are installed on the inlet pneumatic nozzles, not intersecting the internal surfaces of the shell. 1 hp f-ly, 4 ill.

Description

The invention relates to a foundry, in particular, to machines used for the manufacture of casting cores from sand mixtures, compacted under the direct influence of compressed air and cured in a tooling.

The purpose of the invention is to increase the versatility, improve the control of the compaction of the mixture in the process tank, increase productivity.

FIG. 1 shows the proposed machine, a general view (position of the inflation); in fig. 2 is a view A of FIG. one; in fig. 3 shows a section BB in FIG. 2; in fig. 4 - car, view in plan.

The machine for manufacturing rods contains a bed 1 (Fig. 1), on which working tanks 2 are installed, carts 3 with core pins 4, pressing cylinder 5, cylinders 6 of disassembling rod pins 4 (Fig. 2). To feed the core mixture into the working tanks 2, the machine is equipped with a chamber feeder 7 (Fig. 4) connected to the working tanks 2 by flexible pipes 8, which are equipped with shut-off devices 9 at both ends. The working tank 2 of the machine includes a housing 10 (Fig. 3), inside which is installed air-permeable shell 1 G, the inlet 12, the blow valve 13 and the exhaust valve 14. In the lower part of the working tank 2 is mounted an inflatable plate 15.

The working tanks 2 are mounted on the bed 1 (Figs. 1 and 2) in such a way that they can move in the direction of movement of the carriages 3 with the rod boxes 4, and also rotate relative to the vertical axis of the machine. In this case, it is advantageous to rotate the working tanks in the direction of their position (Fig. 1).

The machine works as follows.

The core box 4 (for example, for a complex centering rod from a sand-resin mixture of casting a cylinder block of a U-shaped internal combustion engine) mounted on the transport carriage 3 is moved to the position of the inflation side where it happened (L

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it is pressed by the cylinder 5 to the inflatable plates 15. Open the shut-off devices 9 on the flexible pipe 8, and the sand mixture under the influence of compressed air with a pressure of 0.15-0.25 MPa flows from the chamber feeder 7 into the working tanks 2 and fills them. The blow valve 13 is closed while the air entering the tank with the mixture is filtered through the air-permeable walls of the shell 11 and

The filling of the working tanks 2 with the sand mixture from the chamber feeder 7 through flexible pipelines 8.

After filling the working tanks 2 with sand mixture for the next inflation, the pressing cylinder 5 with the transport carriage 3, on which the core box 4 is installed, is lowered, and the transport carriage 3 with the core box 4 is moved to

.u.civ.m v .., ™. . , „,.„. Г position of curing rod and disassembly

the exhaust valve 14 is removed to the environment of the 10 core case (Fig. 2), and the cylinder 5 is filled with a medium. Then the pod locking device enters another pivot box,

close and inflate the rod and repeat the cycle.

Box 4. At the same time, the blower is opened. The proposed machine provides the valve 13 and air under pressure 0.3 controls the compaction of the mix, 45 MPa enters first through the walls 15 bc throughout the entire rod, thereby eliminating the air-permeable shell 11 rods on

nude cavity last. Jets of air to under-compaction and loosening, constituting

to the center of the sphere of the housing 10 and both now at least 2%. By

gulls 11, a cumulative effect is created, the possibility of retooling, which

the spirit acts on the mixture, forming a flow being 3-5 in a shift and more than it takes

increased effect as a result of the concentration of approximately 20% of the time the machine has been operating from the radio energy of the air in the direction of blowing — a corresponding decrease in its output hole of the inflatable plate 15, allowing the mixture to flow out as a dense flow into the core box 4. Taking into account the described process of blowing the mixture, be called pneumocumulative. The filled core box 4 is not lowered until the queue sequence occurs, the time spent on changeover is approximately halved, i.e., the productivity of the machine increases by about 10%. In addition, improving the versatility of the machine reduces the fleet of equipment, which simplifies and reduces the cost of its operation.

Approximately 20% of the machine’s operating time, with a corresponding decrease in its productivity, reduces the time spent on changeover by approximately half, i.e., the productivity of the machine increases by about 10%. In addition, improving the versatility of the machine reduces the fleet of equipment, which simplifies and reduces the cost of its operation.

Fig 2

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Claims (2)

1. MACHINE FOR THE PRODUCTION OF CASTING RODS, containing two working tanks, each of which has a housing inside which there is a breathable shell, an pneumatic outlet pipe with a gate, an inflatable valve with a valve chamber and an inflatable plate, characterized in that, in order to increase universality, improvement of regulation of mixture compaction in the technological tank, increase of productivity, working tanks are installed with the possibility of their inclination relative to the vertical axis by an angle of 60 ° and moving tnositelno gorizon'talnoy each other in a plane. 2. Machine by π. I, characterized in that the gates are installed on the pneumatic inlet nozzles without intersecting the inner surfaces of the shell.