SU1503979A1 - Moulding machine - Google Patents

Abstract

The invention relates to foundry, primarily to the construction of molding machines for the manufacture of one-off sand molds in flasks using a shaking-pressing method. The purpose of the invention is to increase reliability and reduce noise. The molding machine contains a pressing cylinder 3, in which the pressing piston 4 is placed. Inside the piston 4 there is a shaking piston 9 of the working table 10. The angular fixation of the piston 4 consists of a pair of rotary cylindrical rollers 16 mounted with floating sleeves on fixed-axis cylinders 3 x 18. Angle fixation of the table 10 is carried out by rollers mounted with floating sleeves on 22 mounted axle housings. The housings 22 interact with the rods 26. The protective cover 27 is installed with a minimum clearance relative to the table 10 and the cylinder 3 and forms chambers 28 and 29 into which compressed air is supplied, preventing the molding sand from accessing the molding parts of the molding machine. The use of the invention allows to increase the durability of the molding machine, reduce the cost of repair and maintenance, and improve the operating conditions. 4 il.

Description

ABOUT-

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31503979

HbDC cylindrical rollers 16 mounted with floating sleeves on fixed axles 3 x 18 fixed in the cylinder. Angle fixation of the table 10 is carried out by rollers mounted with floating sleeves fixed on 22 axles fixed in housings. The housings 22 interact with the rods 26. The protective casing 27 Q is installed with a minimum clearance relative to the table 10 and the cylinder 3 and forms chambers 28 and 29 into which compressed air is supplied, preventing the molding sand from accessing the molding parts of the molding machine. The use of the invention allows to increase the durability of the molding machine, reduce the cost of repair and maintenance, and improve the operating conditions. 4 il.

The invention relates to foundry, primarily to the construction of molding machines for the manufacture of sand molds in flasks using shaking and pressing mechanisms for compaction of the molding sand.

The purpose of the invention is to increase reliability and reduce noise.

Pa figure 1 shows the molding machine, longitudinal section}. FIGS. 2 and 3 are cross-sections A-A and BB in FIG. 1, respectively, in FIG. 4, section B-B in FIG. 3.

The molding machine contains a base 1, on which a press cylinder 2 is installed by means of elastic elements 2. On the cylinder 3, the press / piston 4 is centered with a massive shank — the stem 5 has an inner surface of the shaking cylinder 6. At the bottom of the rod 5, a chamber 7 dp of reducing the pressure of exhaust air is made when exhausting from the chamber 8 of the shaking cylinder 6. In the shaking cylinder 6 there is a shaking piston 9 which is the guide shank of the working table 10. The machine is supplied with It is also provided with a chamber 11 formed inside the shaking piston 9 and serving as a receiver for the chamber 8, and a chamber 12 of the press cylinder. Channels 13 and 14 serve for supplying compressed air to the machine. Channels 15 are used to exhaust exhaust air. The table is locked using a two-stage system, the first stage of which fixes the angular position of the rod 5 with the piston 4 relative to the cylinder 3 and contains one pair of rotary cylindrical rollers 16 mounted with

floating sleeves 17 fixed on the cylinder 3 axles x 18. The rollers 16 interact with flat flats 19, diametrically spread out on the rod 5 (figure 2). The second stage fixes the angular position of the table 10 relative to the rod 5 and contains two pairs of rotary cylindrical rollers 20 mounted with floating hubs 21 on the axles 23 fixedly mounted in housings 22 (fig. 3 and 4) .- The housings 22 are fixed on the flange 24, attached to the upper end of the rod 5. The rollers 20 interact with flat flats 25, made on two rods 26 fixedly mounted on the table 10. The flange 24 also has a protective cover 27, the upper and lower parts of which are mounted with a minimum relative distance but the cylindrical surface of the table 10 and the outer surface of the upper part of the cylinder 3. The upper part of the protective casing 27 forms a chamber 28 with the surfaces of the table 10 and the flange 24. Similar chamber 29 is formed by the surfaces of the casing 27, the upper part of the cylinder 3 and the flange 24. These chambers A small amount of compressed air is supplied from the line through the throttle 30. To soften the blows and rationally form the shock impulses at. A shim 31 is intended for shaking.

The molding machine works as follows.

On the work table 10, a model plate is fixed on which a flask is mounted (not shown). The flask is filled with molding sand, and compressed air is fed through the duct 14 into chamber 12. When the chamber 12 is filled, the press / piston goes up

against the shoulder of the cylinder Z. and raises the shaking mechanism to the working position. The compressed air supply is turned on through channel 13 to chamber 11, from which air flows into chamber 8. Under the pressure of compressed air filling chamber 8, the shaking piston 9 with table 10 and the payload go up. In the course of movement of the piston 9, the compressed air in the chamber 8 is cut off and expanded, and then the air leaves through the channels 15 using the buffer chamber 7. The desktop 10 with the payload travels a further distance upwards by inertia, and then changes the direction of movement and fall down. Table 10 is impacted by a gasket 31 and a flange 24 with a rod 5. Lifting-press head 4 with a massive rod 5 lying on the air cushion of chamber 12, dampen the transfer of shock loads to the base 1 and the foundation. Under the action of the impact force that occurs when the table 10 interacts with the rod 5, the latter goes down. However, its movement is rapidly slowed down by the air pressure in chamber 12 and the stroke of piston 4 with piston 4 is a small amount (1-2 mm). Then the piston 4 with the rod 5 moves upwards. In the upward direction, these bodies can collide again with the table 1.0, accelerate it upward, and also strike the ledge of the cylinder 3. The shocks of the piston 4 against the ledge of the cylinder 3 are damped by springs.

 Along the way down, the shaking piston 9 closes the exhaust and friction losses open as it moves.

the intake channels in the shaking cylinder 6, the chamber 8 is filled with compressed air and the cycle is turned. torus Embedding stops when channel 13 is disconnected from the network. Chamber 12 then communicates with the atmosphere, and piston 4 lowers the shaking mechanism to its original position (bottom). A press head is positioned over the compacted molding sand, and compressed air is again supplied to chamber 12. After filling the chamber 12, poryen 4 goes up, having compressed the molding sand. The chamber 12 is then reconnected to the atmosphere, and the rim 4 is lowered with a shaking mechanism. The separation is made of a compacted semi-pore. from the model plate, removal 45

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table and lift-press piston, the noise level is reduced due to the installation on the surface of the impact of shock-absorbing pads and shielding the site of impact from the environment with a protective casing. The use of a protective casing with chambers into which the compressed air from the main line is continuously supplied eliminates dust and sand from falling on the surface of the shaking and Pressing pair and increases the durability of the respective cylinders and vehicles.

Claims (1)

Invention Formula Forming machine containing press cylinder with press port . ten 15 20 25 thirty 35 forms and feed the next mold on the machine table, As the stem 5 moves up and down, flat flats 19, imprinted on its outer cylindrical surface, interact with guide rollers 16, which are pierced on flats, keeping stem 5 from turning around a vertical axis. Rollers 20 work similarly when the table moves 10 with $ 26 rods preventing the table from turning 10. Before the machine starts operation, the compressed air is supplied from the main through the throttle 30 to the chambers 28 and 29, creating a slight overpressure and escaping into the atmosphere through the gaps between the casing 27 and the table 10 and the cylinder 3. Minimum gaps between these parts remain over the entire length of the course of the table 10 relative to the rod 5 and the rod 5 relative to the cylinder 3, and the overpressure in chambers 28 and 29 prevents dust and molding sand from entering the rubbing surface of the shaking and pressing piston actuators. Improving the reliability of the machine is achieved by significantly reducing the wear rate / parts of the device by fixing the working table, in which slip pairs are replaced by more durable rolling pairs, which are easier to make qualitatively, since it is required to ensure alignment in only one radial direction. Loss on friction during movement decreases many times five 0 five table and lift-press piston, the noise level is reduced due to the installation on the surface of the impact of shock-absorbing pads and shielding the site of impact from the environment with a protective casing. The use of a protective casing with chambers into which the compressed air from the main line is continuously supplied eliminates dust and sand from falling on the surface of the shaking and Pressing pair and increases the durability of the respective cylinders and vehicles. Invention Formula A molding machine containing a press cylinder with a press tailor, a work table with a shank, a fixture for fixing a stem in the form of rods and a protective casing, so as to. increase reliability and reduce noise, it is equipped with rollers mounted on fixed axles, A- / I placed opposite faces, made evenly spaced on the press piston and rods, and the protective cover forms with the work table and press cylinder of the chamber connected to a source of compressed air. Phage.5 L Phage.h