SU361089A1 - AUTOMATIC FOR TABLING FIBER PRESS MATERIALS - Google Patents

Description

The invention relates to the processing of plastics and can be used in electronic and other industries for tabletting fibrous molding materials, for example of the type AG-4B.

A machine for the same purpose is known, which contains a device for briquette blowing, made in the form of a roll with a needle-like surface, a material feed mechanism, a plunger-type dispenser and a tablet shaping device.

This machine has the disadvantage that the mechanism for briquetting, made in the form of a needle drum and transport-feeding device, made in the form of a belt conveyor with a gland roller for feeding fluff material to the receiving plates (combs), are large and complex in design.

The proposed machine for tabletting fibrous materials has a small size, simpler in design, provides pressing of tablets of the correct geometric shape and exact weight, which is achieved due to the implementation of the eels and feeding mechanism of the material in the form of counter-rotating hollow rolls, each of which is provided with radially extending fangs mounted on eccentric axles, and a carriage rocking above the rollers intended for

relative to the rolls of the briquette of the press material, separated and fed by the tusks to the combs of the loading device, mounted directly under the rollers and

feeding press material into the injection chamber.

During the stand of the rotary disk, press material is injected into the matrix at the same time in different positions, pressing the tablet, pushing the tablet into the container and returning the punch to its original position.

During the rotation of the disk, the tablet section is derived from the total mass of the press material and the segment of excess press material from the tablet.

FIG. 1 shows the proposed machine, a longitudinal section; in fig. 2 is a section along A-A in FIG. 1 (roll cutting press material); in fig. 3 is a section along BB in FIG. 2

A bunker for a press material briquette, a fuzzing mechanism (razdirki), a feeding device, a volumetric dosing device (batcher) of the press material, a shaping device (tabletting), a disk accelerated turning mechanism consisting of a dual differential cylinder and a turning mechanism are installed on the machine bed.

The hopper / includes a carriage 2 mounted on the belts 3 and 4, and a hydraulic cylinder 5.

Mounted under the bunker / the fuzzing mechanism consists of two hollow rolls 6 and 7 rotating towards each other, each of which is equipped with radially extending tusks 8 placed on eccentric axes 9 and 10. On the cylindrical surface of the rolls there are radial holes in which fangs 8. When the rolls rotate, the rotational eccentric movement is conveyed to the fangs, i.e. the fangs move relative to the grooves of the rolls by the amount of eccentricity of displacement of the axes of the canines relative to the axes of the rolls.

A device consisting of two blocks of moving and stationary toothed comb plates // and 12 is mounted directly under the razditerny rollers on the frame. The movable plates receive reciprocating motion from the eccentric rollers 13.

The volumetric metering device is a plunger type dispenser and consists of a pressure chamber 14 with a spinneret / 5; heated by the electric heater 16, and the dispensing discharge cylinder 17.

The shaping (tabletting) device consists of a rotary multi-position disk 18 with molds 19 and a frame 20 with adjustable screws 21 intended for pressing and ejecting tablets.

The frame receives a reciprocating motion from the independent pressing cylinder 22.

The differential twin cylinder 23 serves to drive the turning mechanism and contains two external 24 and 25 different diameters that can move one relative to the other. The cylinder 23 provides cutting tablet and turn the disk.

The disk rotation mechanism consists of a shaft 26, on which gear 27, engages with the teeth of the disk, and gear 28, engages with the rack 29 of the cylinder of rotation of the end coupling 30, which rotates the shaft in one direction, and brakes 31 .

When the cylinder rails go up, the disk rotates with the end clutch, and when the rake reverses, the coupling teeth skip relative to each other and the shaft of the rotation mechanism stands still.

The machine operates in two modes: loading and pressing.

The briquette of the press material loaded into the hopper 1 in the “loading” mode performs a reciprocating motion with the help of the carriage 2 relative to the rolls b and 7.

The rolls, rotating towards one another, seize the press material with the tusks 8, tear it off from the briquette and feed it onto the comb plates 11 and 12, which, after a swinging motion, compact the fluff press material and feed it into the discharge chamber

14. The cylinder of the injection cylinder 17 cuts off the press material from the total mass and pushes it through the spinneret 15 of the injection chamber 14. After filling the chamber with the press material

injection takes place automatic switching of the automaton from the loading mode to the pressing mode.

In the pressing mode, the heated press material is pushed out of the pressure chamber 14 by the cylinder of the injection cylinder 17 through the die plate 15 into the matrix of one of the molds 19 installed on the disk 18. At the same time, the tablet is pressed in other positions of the disk, pushing

pressed tablets into the container and the return of the punch to its original position. These operations are carried out with the help of screws 21 mounted on the frame 20, driven from the pressing cylinder 22. During

rotation of the disk 18, the tablet is cut between the ends of the matrix 19 and the die 15 of the total mass and a segment of excess press material from the tablet.

The disk is rotated by a dual differential cylinder operating during the cutting of the tablet by two pistons 23 and 24, providing the necessary shear force, and during idling - by one piston

24, reducing the turnaround time.

The tableting process continues until the cylinder of the injection cylinder 17 pushes all the press material from the injection chamber 14 into the mold molds 19, after which the automatic switch from the “pressing to the loading” cycle takes place. Thus, the proposed machine makes it possible to automate the process of obtaining tablets of the correct geometric shape and exact weight from briquetted press material, for example AG-4B, which can be compacted after subsequent pressing.

applied high-frequency heating, which significantly reduces the process of pressing products.

Subject invention

A fiber tableting machine for molding press materials containing a briquette powdering mechanism and a material supply, a spinner type dispenser and a tablet forming device, characterized in that, in order to improve product quality, the aerated material feed mechanism is designed as counter-rotating hollow rolls with radial sliding tusks mounted on eccentric axles and located above the carriage rolls with a hopper equipped with a mechanism for communicating

her swinging motion.

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