SU852445A1 - Plant for production casting by vacuum process - Google Patents

Description

one

The invention relates to foundry and can be used for the manufacture of castings by vacuum molding.

Known automatic carousel installation with a vertical connector opok. In this setup, twenty-eight forms are placed on the carousel. After lining the model plates, the film-coated models are pivoted with the help of rotating devices to the molding, where sand is fed into the flask from the bunker, compacted by vibration and the flask is sealed. After evacuation and compaction of sand, model plates are extracted and transferred to the film for re-lining. The finished mold half is transferred to the carousel, rods are inserted into it and the mold half is pressed against the mold half issued in the previous cycle. After the mold is assembled, the carousel is rotated one step, the mold is cast, and after the metal solidifies, the mold is automatically disconnected from the vacuum system and disassembled. The casting and sand fall onto the grille under the carousel, and the flask is again transferred to the molding 2.

This installation has a number of significant drawbacks:

carousel, forming device, two

the positions of the lining of the models with synthetic film are installed separately from each other, which makes it difficult to install and adjust overloading devices with ensuring

5 exact statement of flasks on model equipment and their docking;

application on the installation of a bulky system of twenty-eight flexible hoses attached to the ladder of the flask is unreliable

10 during the transfer of the flasks to the molding and to the carousel, since the hoses can easily be mechanically damaged and, during the pouring of the metal, from metal ingestion; area inside the carousel used

15 is irrational, which significantly increases the total area occupied by the installation equipment;

Only one item of the product is being cast at the facility at the same time, since for the manufacture of other items it is necessary to stop the operation of the equipment for changing the equipment.

A mechanized carousel line for the production of a 25-minute casting machine is also known, which contains a sand bin, a two-stage molding installation, an eight-position hoist carousel, an embossing grille, a sand receiving bin and a sand separator.

30 from metal 2.

This line has the same drawbacks as the above carousel installation with a vertical connector of the flasks. In addition, the use of a telpher for permutations of the flasks and zero-forms increases the number of manual operations, and a small number of positions leads to the fact that the rate of operation of the line is very low (5 forms per hour), and even then during the casting of quick-hardening silumin.

In addition, the known vacuum forming line is a horizontally closed carriage conveyor with a molding installation, an ileiki heater, a knockout grill, a system of conveyors for the floor, vacuum pumps, a receiver, turntables, bunkers and a vacuum node system with flexible hoses to the equipment listed above near conveyor

 The disadvantages of such a vacuum line

Molding is the following:

the accuracy of the arrangement of the individual parts among themselves is small, which makes it difficult: to ensure reliable combination of the flasks between themselves and placing them in the molding and assembly positions;

it is required to move the flasks and half-molds over considerable distances, which complicates the movement mechanisms and increases the time for it;

the area occupied by the line with related equipment is not used economically - inside the conveyor it is filled only with flexible slags;

The routing of flexible hoses from the central column is even more cumbersome than on a circular carousel (the amount of slack is obstructed). They are easily damaged. They must be connected and removed manually, as these operations are mechanized. In addition, the molding machine, which alternately forms the upper and lower zero shapes, requires the return stroke of the conveyor for setting the upper zero shapes, which reduces its possible work rate by a factor of two. And by itself, a single-position molding machine is an inefficient unit. As a result, the productivity of the line is very low (120 tons of steel casting per month during two-shift operation and the size of the SOUKHUX X250 / 250).

The purpose of the invention is to save production areas and increase the reliability of the performance units, as well as ease of operation and ease of assembly and disassembly.

This goal is achieved by the fact that the vertical axis of rotation of the carousel is sectioned with appropriate vacuum supply manifolds and equipped with two batches for making the top and bottom half-molds and assembling, pouring and knocking half-molds, and the mold-forming devices are provided with radial guides.

the plates are made with the possibility of radial movement. Each section of the vertical axis of rotation of the carousel is connected to a corresponding vacuum source.

FIG. 1 shows the proposed installation, a vertical section; in fig. 2 - the same, top view; in fig. 3 - section bb FIG. 2; in fig. 4 shows a section bb of FIG. 2; in fig. 5 - section GG

FIG. 2

The continuous casting installation for the vacuum process contains a vertical axis of rotation, made of sections 1-3. A section 4 of the vertical axis is provided with a collector 4 connected to the top carousel 5 and top shape, a collector 6 is fixed to section 2, connected to the bottom half carousel 7, and a collector 8 is attached to the axis section 3

filling carousel 9.

In addition, on sections 1 and 2 of the axis, annular flooring 10 and 11 for service personnel with fences 12 are permanently fixed, provided with thermal insulation or a cooling system.

The annular flooring 10 has a supporting overlap 13 for the sub-model plates 14 associated with it, and the floor 11 has a supporting overlap 15. The filling carousel 9

contains sections 16 connected between

a means of pins 17 in the ring

circular construction

support rail rollers 18.

In addition, each section 16 is connected by a tubular needle 19 to a collector 8 of a casting carousel 9.

In sections 16 of the casting carousel 9 there are tubular posts 20 with swivel squares 21 and slotted windows

for connected half-molds to a vacuum system.

Above the two openings of the ring construction of the casting carousel 9, corresponding to the internal dimensions of the flasks, on

each section 16 has two

pallet 22 with gate 23. Pallets 22

intended for installation on them

forms 24.

On the carousel 5 and 7 of the top and bottom half-molds, on the radial guides 25 there are mounted model plates 14 with models for making the same or different castings. The submodeled plates 14 are movable by means of a drive 26 along radial guides 25 and a supporting overlap 13 for the top half-mold and the overlap 15 for the half-mold bottom. Vacuum channels from sub-model

The plates 14 mounted on the tables of the carousels 5 and 7, respectively, are connected to the collectors 4 and 6, which, like the collector 8 of the potting carousel 9, have seals 27 at the junction with the shoulders of the sections 1-3 of the axis of rotation.

The casting carousel 9 is connected with the carousel 5 for manufacturing the top shape of a top by means of a loading crane 28 and a loading crane 29, and for the carousel 7 of manufacturing the bottom half-form by a loading crane 30 and a loading crane 31 having a mechanism of 32 turning-overs.

Above the supporting floors 13 and 15, sand bins 33 are installed with a dosing head 34, under which vibrators 35 are located on the floors.

Vacuum wire 36 connects the cavity of sections 1 and 2 of the vertical axis with a vacuum pump for wrapping models with pleics, and vacuum wire 37 connects the cavity of section 3 of the vertical axis with a pump that maintains vacuum on the casting carousel 9.

At the load handlers 29 and 31, the vacuum is applied independently through permanently fixed shlang to the grip points of the flasks, which have check valves.

The installation works as follows.

Carousels 5, 7, and 9 have a shag feed with a distance from hydraulic actuators (not shown), and the height for the casting and molding carousels depends on the required technological time for individual operations or their part, as well as on the ratio of the number of positions on the casting carousel 9 and molding carousel x 5 and 7.

On the carousel 5 of manufacturing the half-mold top, at positions 38 and 39, in the direction of movement counterclockwise from reloader 29, the model blown on the submodel plate and covered with film is blown.

At positions 40 and 46, the model and the film covered with a film are painted. At position 47, the model plate 14 is shifted by the actuator 26 to the overlap 13 and is covered with the chamber by means of a reloader 28.

Shifted under the dispensing head 34 of the flask 33 of the flask, standing on the sub-model plate 14, is filled up with a portion of sand and compacted with a vibrator 35.

At position 49, sand-filled flask 50 is covered with film, captured by reloader 29, evacuated through vacuum wire 51, and after vacuum relief on the sub-model plate 14 is transferred to the bottom half-form, which at this time is already located at the node 29 of the spreading table 29 on the filling carousel 9.

Thereafter, the mold half is connected to the vacuum system of the casting carousel 9 by bringing in it a rotary angle piece 21, and the loading crane 29 is moved to an intermediate position.

At this time, the release of the model board 14 by the reverse motion of the drive 26 moves along radial guides 25 from the overlap 13 to the carousel 5.

The making of the bottom half-molds is carried out in a similar way on the carousel 7, but the position 38 for the carousel 7 collapses in the counterclockwise direction of the loader 31,

which, during the transfer of the bottom half of the form, cant it 180 ° around a horizontal axis perpendicular to the plane of transfer. At position 52 of the casting carousel 9

in the direction of movement counterclockwise from reloader 29, the bottom and top half-forms are fastened and casting teas are set. On the section from the 53 position to the 66 position

It is possible to produce metal casting and cooling, and, at position 67, knock out the finished casting.

At position 67 of the casting carousel 9, the vacuum is disconnected from the top and i-shape and

at the bottom, in the pallet 20, the spike 23 is opened, and the casting together with the test enters the tunnel and is transported from the installation.

At position 68, which coincides with the loader 30, the upper empty flask is transferred to the sub-model slab on the slab 15 and, after passing through the previously described molding steps, can be turned by the loader 31 and placed on the free space 69 of the casting carousel 9.

At position 70, which coincides with the loader 28, the bottom empty flask is transferred to the submodel plate 14 on the floor 13 and, after the forming stage, the loader 29 is set to

bottom half-form at position 71.

From position 69 to position 72, the bottom half-form moves without the top half-form, and this time is used to set the rods.

The metal casting on the line casting installation of the vacuum process can be performed continuously during the spacing movement of the casting carousel or periodically, in this case, the casting carousel is stationary, and the casting brush moves from 66 to 53 positions.

Thus, the proposed installation of the in-line casting in a vacuum process takes up a much smaller area.

due to the fact that all actuators are mounted on one common axis of rotation.

Basing the carousels on the same axis of rotation ensures the reliability of their mutual functioning.

The implementation of sand filling and vibrating on sub-model plates, which are shifted to fixed rigid floors, reveals the dynamic and static overloads from the tables of the carousels 5 and 7, thus raising the working capacity of the individual installation units.

The proposed installation is reliable in operation, its installation, repair and maintenance are greatly simplified, since the vertical axis of rotation is made integral and has an internal cavity in which the vacuum wire is located. In addition, the installation is universal, it can be used for the simultaneous manufacture of castings of different nomenclature.

Claims (2)

1. A vacuum process casting machine comprising a carousel with a vertical axis of rotation, a forming device associated with it by reloading machines with sub-model plates for top and bottom half-form, a device for wrapping the model with film, devices for filling and sealing molding material, tilter, embossing grill and vacuum supply manifold, characterized in that, in order to save production space, increase the reliability of the mutual functioning of the actuating units through their compact placement, the vertical axis of rotation of the carousel is made sectional with appropriate manifolds for supplying vacuum and is equipped with two batches for making, respectively, the half-form of the top and bottom and the blond-shaped assembly, pouring and knockouts, the molding devices being provided with radial guides, and the model plates made with the possibility of radial movement. 2. Installation according to Claim. 1, other than in that each section of the vertical axis of rotation of the carousel is connected to a corresponding vacuum source. Sources of information taken into account in the examination 1. Palestine V.S. Vacuum method of making sand forms without using a binder, Heyol, 1974, no. 5, p. 26. 2. "Foundry production, 1977, No. 7, with. 19, fig. 1, s. 20, Fig. 3 (prototype). 9/8 a fff ff g ..;. °; -;. „-.Y. l. , - L. ;; but- -, .. . about. about with, - °. . . , f. . ;; -.;, .- b-: °: i; -; °; -:; b.j.-i.- ° ° /rg / h fg / g Jj ; .-- o: - s, -.-- o--,: -; ;;; - v-ov:; - v ..- .. (,.; -o, -; ...- T; years ...-. I-, o:,.;, ..; -. -.... ..-.,: