SU1560364A1 - Shaking moulding machine - Google Patents

Abstract

The invention relates to foundry and can be used in the design of pneumatic shaking and press shaking molding machines and machines. The purpose of the invention is to improve the quality of compaction of the molding sand when shaken without transferring shock loads to the substrate. The insertion molding molding machine comprises a welded base 1, to which the guide cylinder 4 and the step support column 5 are attached, located inside the striker 6 and its shank 7. The shank 7, which is the agitating piston, is located in the agitating cylinder 8, which is internal surface of the guide shank 9 of the working table 10. The machine has chambers 19 and 27 communicated with a source of compressed gas. Their presence allows the use of a large drummer. 1 il.

Description

The invention relates to foundry and can be used in the design of pneumatic shaking and pressing and shaking molding machines and automatic machines.

The purpose of the invention is to improve the quality of compaction of the molding mixture when shaken without transferring shock loads to the base,

The drawing shows a molding machine, a slit.

The molding machine contains a welded base I, to which, by bolts 2 with elastic elements 3, a guide cylinder 4 is attached. The base 1 also has a central step column 5 located inside the drummer 6 and its shank 7. The drummer 6 is centered on column 5 and rests on its upper end. The shank 7 of the striker 6 is a shaking piston and a guide shank 9 of the working table 10 is installed on it by means of a shaking cylinder 8. A shock-absorbing gasket 11 is installed on the upper end of the striker 6, Axial fixation of the working table 10 is provided by two cylindrical rollers 129 mounted on the axes 13 with the possibility of adjusting their position in the radial direction by bolts 14. The rollers 12 interact with the guide shank

9 ON FLAT BALS. IN THE BASIC COLUMN

5 is a cylinder 15 in which the piston 16 is located. Iorshen 16 is made in one piece with a long rod 17 centered on the upper part of the support column 5, and a restrictive spring 18 is mounted on the rod 17. The machine is equipped with a chamber 19 of the shaking cylinder 8 with a feed channel 20 and exhaust air exhaust channel 21 at the exhaust, with chamber 22 of a lifting cylinder 23 located between the upper end of the support column 5 and the shank 7 of the striker 6 and equipped to supply compressed air

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from the line and removing the exhaust air by the channel 24, the chamber 25 of the pneumatic spring, into which compressed air is supplied from the line through the pressure regulator 26 and the additional chamber 27 of the striker 6’s upward movement while being shaken, into which the compressed air is periodically supplied from the chamber 25 through the channels 28 and 29 and is removed via channel 30 to the internal polostC, base 1,

The molding machine works as follows.

Compressed air is supplied through channel 24 to chamber 22 of lifting cylinder 23 and through regulator 26 to chamber 25 of the pneumatic spring. The piston 16 with the rod 17 and the drummer 6 with the work table 10 move up to the stop with the upper end of the drummer 6 at the lower end of the guide cylinder 4. Along the way up, the work table 10 removes the model plate and the flask from the transport devices, assembling the tooling (not shown) and the piston 16 compresses the restrictive spring 18 resting against the upper end of the cylinder 15. The mold is filled with a molding sand, for example, from a hopper located above the machine, and then the shaking mechanism is set to the working position for shaking. positioned below the upper limit position and the lowering of the shaking mechanism is provided automatically when the chamber is connected to a 22 l lift cylinder 23 with the atmosphere through channel 24. Under the force of gravity of the shaking mechanism with the payload and the force developed by the previously compressed spring 18, the lowering occurs the piston 16 with the rod 17 and resting on the last of the shank 7 with the drummer 6 and the table 10 to a height sufficient to eliminate the shock of the upper end of the drummer 6 on the lower end of the cylinder 4, which could dit with shaking.

To enable shaking, compressed air is supplied through channel 20 to the chamber

18in the cylinder 8, under the action of compressed air filling chamber 19, the worktable 10 with the shank 9 and the payload moving up, and the shaking piston 7 with the hammer 6 go down, compressing the air in the chamber 25 of the pneumatic spring

and finally unloading the restriction spring 18. After the shaking piston 7 and the cylinder 8 have completed the filling and expansion stroke, the channel 21 connecting the chamber opens

19 with the inner cavity of the base 1 and the atmosphere. The payload desktop 10 and the firing pin 6 are still inertia for some distance in the previous directions, and then the movement direction is changed: the payload table 10 moves down under the force of gravity, and the firing pin 6 goes up with the piston 16 and the rod 17 under the action of the pressure of compressed air in the chamber 25 on the piston 16. At the end of the counter stroke, a collision occurs through the spacer 11 of the impactor 6 s. guide shank 9, arising during sudden braking of the table 0 and the model plate, shock and inertial loads seal the molding sand. The compressed air is again supplied to the chamber 19p and the cycle is repeated.

The shaking efficiency is increased due to the use of the additional chamber 27 of the striker 6 acceleration upwards, which allows the kinetic energy of the striker to be increased during its working stroke to the required technology and compensate for the energy loss caused by the decelerating action of the spring 18 in contact with the top.

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Him end cylinder 15 and compressible piston 16.

The use of an additional chamber 27 occurs as a result of supplying compressed air into it when the striker accelerates upwards from chamber 25 through channels 28 and 29. At the end of the striker’s upward stroke, the cut-off and expansion of air in chamber 27 and then exhaust through channel 30 occurs.

In the proposed molding machine, it is possible to use a massive drummer whose mass is equal to or exceeds the mass of the desktop with the payload. The use of a large impactor and the possibility of intensifying its movement upward by using an additional chamber to disperse the impactor allows shaking with a large amplitude of movement of the table and effectively compacting the forms of sandy-clay mixtures.

Claims (1)

Invention Formula An insertion molding molding machine comprising a base, a guide cylinder, a worktable with a hollow shank, a drummer placed in the upper part of the cavity of the table shank and mounted on a support column fixed to the base, and a piston located in the cavity of the support column, that, in order to improve the quality of the compaction of the filling mixture when shaken without transferring shock loads to the base, the supporting column is made in a stepped form and is located in a stepped cavity made in the drummer with The formation of two chambers between the drummer and the steps of the column, these chambers communicate with a source of compressed air. five 0