SU1452644A1 - Moulding machine - Google Patents

Abstract

The invention relates to foundry. The purpose of the invention is to improve the performance and improve the quality of manufactured forms. The molding machine contains a desktop 6 driven by a shaftless motor.

Description

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The invention relates to a foundry, namely, equipment for the manufacture of foundry molds.

The purpose of the invention is to increase productivity and improve the quality of manufactured forms.

The drawing shows the proposed, general view.

The -1machine consists of the base 1, the cylinder 2 of the internal combustion engine, the struts (columns) 3 with the start mechanism 4 and the crosshead 5. The worktable 6 of the molding machine is fixed to the piston 7 of the worktable's drive. The fuel system, the theme of the desktop drive consists of a fuel tank 8 connected to the fuel-injected water with a high-pressure fuel pump 9 and a nozzle 10. To blow the cylinder 2 out of the exhaust gases, the air line 11 with a check valve 12 is used, and to discharge the exhaust gases Designed slots 13, connected through a collector 14 with the ventilation system of the workshop or with the atmosphere. The fuel pump is driven by hitting the height-adjustable stop 15 fixed to the bottom of the working table 6 on the plunger-fuel pump head 9 when the working table 6 with the piston 7 is down. The starting mechanism consists of horizontally movable lugs 16 moving inside the cylinder 17 under the action of compressed air, and pneumatic cylinders 18 mounted on columns 3. The rotation of the working table during operation of the device is prevented by means of

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19 and sockets 20, respectively, mounted on the work table 6 and the base 1 of the machine.

The press block 21 is mounted on the piston 22 of the cylinder 23 of the internal I combustion. Press block 21 with: piston 22 is kept from falling: rolling pins 24 entering the sleeves 25 and having spring shock absorbers 26. Just like the drive of the working table of the machine, the drive of the press block is equipped with a high-pressure fuel pump 27, driven by an emphasis 28, fuel tank (not shown), a nozzle 29, an air pipe 30 with a check valve 31 for purging the cylinder with air, as well as exhaust ports 32 and a manifold 33 For exhausting gases.

The machine works as follows.

In the initial position, the worktable 6 of the molding machine is in the raised position and rests on the mounted stops 16, and the press shoe 21 is lowered to the lower position and hangs on the rolling pins 24, which rest on the springs 26 inside the cylinder 23. The plungers of the fuel pumps 9 and 27 are TC, respectively, in the upper and lower positions, and the inner space between the plungers and pump housings is filled with fuel coming through the pipeline from the respective fuel tanks. Through pipes 11 and 30 of compressed air, cylinders 2 and 23 are blown through with air passing through check valves 12 and 31. On the work table 6 there is a model-optional set

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with filling frame loaded

. a mixture.

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The machine is put into operation by pulling in the stops 16 by moving the associated pistons inside the cylinders 17 under the action of compressed air. The table 6 freed by the stops 16 together with the piston 7 and the model-optional set with the mixture falls down. By blocking 7 piston holes 13 in the cylinder 2 with the piston, the piston compresses the air, as a result of which the air temperature rises. When the air pressure is greater than that in the supply pipe 11, the check valve 12 closes and the air is compressed and heated in the cylinder 2. At the end of the lowering of the table 6, the stop 15 fixed on it strikes the shank of the plunger of the high-pressure pump 9 and moves it down, drying the fuel injection through the nozzle 10 into the piston space. 5 The fuel is ignited by the high temperature of the compressed air and an explosion occurs in the sub-piston space, just like in a diesel internal combustion engine. As a result, the piston 7 with the working table 6 and the model-optional set with the mixture is sharply moved upward with acceleration greater than 5g and reaching up to: 3008 and continues to move rapidly under the pressure of the expanding combustion products of the fuel until the opening 13 is opened by the piston 7. As a result of the mixture getting the acceleration in it, proportional to the acceleration of inertia forces arise, which tend to preserve the state of the mixture in which it was in the upward movement. Under the action of inertial forces, the mixture is condensed in a manner similar to that of a mixture, as is the case when the mixture is compacted with shaking. When the piston 7 moves upward, the plunger is refilled with fuel. After opening the piston 7 of the exhaust ports 13, the pressure in the cylinder 2 drops and compressed air begins to sink through the pipeline 11 and the check valve 12, the combustion products are carried out through the exhaust ports 13 and the collector 14 in the workshop ventilation system, and the working thickness is 6 seconds. -key kit continues to move up

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inertia. At the same time, the upper layers of the mixture loaded into the box-mounted sidewall and the filled frame enter into contact with the pressing block 21 and, compacting themselves, begin to lift the pressing block and the associated piston 22 entering the cylinder 23. The piston 7 out of the cylinder 10 2, and the alignment of the cylinder and

the piston is provided by means of the rails 19. When the piston 22 is raised, it overlaps the exhaust ports 32 and then the process in the cylinder proceeds in the same way as in the lower cylinder: when air is compressed under the piston, it heats up, the stop 28 of the press block 21 presses the plunger tail fuel pump 27, injecting fuel through nozzle 29 into cylinder 23, self-ignition of fuel occurs in the cylinder, accompanied by explosion, as a result of which piston 22 acquires a significant acceleration, transfers it to the press block, which t on the mixture, producing additional compaction. Upon further movement of the piston 22 with the press block down, the exhaust ports 32 open, and then the press block 21 begins to brake by means of the spring shock absorbers 26 through the rolling pins 24, into the working table 5 with the piston 7 and the model-optional snap keeps moving down. After the piston 7 enters the cylinder 2 and after the holes 13 are closed, the air begins to compress again in the sub-piston space, at the same time the brake moves the falling parts. The cycle can then be repeated or the process can be stopped by cutting off the fuel supply to the cylinder.

5 2. In the latter case, at the end of the downward stroke of the piston, air is throttled from under the piston space and the worktable 6 stops in the lower position. For

When the table returns to its original position, the cylinders 18 are lowered down, the stops 16 exit from the cylinders 17 under the working table 6, after which the cylinders 18 rise again to the original

5 position. A ready-made mold with a model is removed from the working table and a new model-rigging rig loaded with the mixture is installed, and the process of making the mold is repeated.

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The proposed design of the molding machine allows to intensify the process of compacting the mixture by creating an additional shock pulse during the process of pressing the mixture. And, thereby, increasing the productivity of the machine, as well as choosing the necessary optimum force to act on the mixture as in the course of compression (in the lower part of the form), and in the period of compaction of the upper layers of the mixture during pressing due to the dosage of fuel in the combustion chamber, depending on the parameters of the model,

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pho 5 mixtures and technological requirements for the quality of the form.

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Claims (1)

Invention Formula A mold macele containing a worktable with an internal combustion drive, having a starting mechanism, a traverse on the columns and a press tank, is characterized in that, in order to improve the quality of the forms produced and increase productivity, it is equipped with a drive for the press shoe fixed on the traverse. and similar to the desktop drive. Editor V. Bugrenkova Compiled by A. Idrisov Tehred L. Oliynyk Proofreader V. Girn to Order 7118/8 Circulation 710 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5   - - - --- - - -, .. „..„ I Production and Printing Enterprise, Uzhgorod, st. Project, 4 Subscription