SU459876A3 - Apparatus for applying liquid plasticizer to continuously moving filter media - Google Patents

Description

two air nozzles 7 and 8 for expanding the filter tow.

The plasticizer supply device 2 is located between the other two pairs of rollers 9 and 10. All pairs of rollers 5, 9 and 10, as well as the drive of the device, are driven by an electric motor 11. At the same time, the speed of moving the rollers 5 is less than that of rollers 9 and can be adjusted by means of an actuator 12, the gear ratio of which varies from the adjustable servomotor 13.

The plasticizer spraying device 14 consists of a reservoir 15 enclosing a filter material belt 4 located in a plasticizer application zone 16, as well as from suction channels 17 and a common suction pipe 18 that is connected to the reservoir 19.

To the pipeline 18 under, the separator 20 is connected to the fan 21, creating an air flow.

On the path of the tape in the zone of application of the plasticizer in the tank 15, a plate 22 is horizontally mounted to catch droplets of plasticizer mist passing through the belt 4 of filter material.

A spray nozzle 23 for supplying a plasticizer is connected to a pipe 24, which is connected to an automatic distributor of the amount of plasticizer supplied in the form of throttles 25 with a pressure gauge 26. A measured pump 28 is used to supply the plasticizer from the reservoir 19 to the nozzle , for example a tachogenerator driven by the main motor 11, comparing the element 29, the driver element 30 and the amplifier 31.

The plasticizer is metered in accordance with the speed of the tape, while the higher the speed of rotation of the motor AND, the more the throttle 25 opens, and vice versa. Thus, the supply of the plasticizer automatically corresponds to the speed of movement of the filter media.

When spraying from the nozzle 23 a drop of mist plasticizer fall on the catching plate 22.

Due to the fact that the tape slides along the plate, the droplets are removed and picked up by its bottom side. A certain amount of plasticizer that is not bound to the belt enters the suction channel 17, in which a small vacuum is created. From the duct 17, the plasticizer is sucked through the pipeline 18 and the separator 20 into the tank 19.

The prepared and impregnated plasticizer tape of filtering material 4 is fed to the mechanism 3 for the manufacture of filter tows in shells, which includes a funnel 32 in which the tape is collected

in the bundle and placed on the shell 33, unrolled from the reel 34 and glued by means of the device 35, guiding the template 36, the plate 37 for drying the glue line, the device 38 for cutting the harness, the ejector 39 for converting the filter pieces to the drum 40 and the conveyor 41 for feeding filter sections for further processing of the technological cycle.

In attachment 2 for supplying plasticizer to the filter media, the spray nozzle 23 is located underneath, under the filter media, the plasticizer is supplied from the nozzle with compressed air and the gear motor is driven by a main drive motor. The tank 42 (Fig. 2) is located so that the spray nozzle 23 is directed to

tape bottom. The latter is connected via pipeline 43 to a fan 44, which creates an air flow. Gear pump 45 has an adjustable drive 46, driven by the main drive

motor 47 through a V-belt transmission 48, the speed of rotation being regulated by a handwheel 49.

When improving device performance gear pump 45 delivers to

the spray nozzle 23 has a larger amount of plasticizer, while the air pressure in the pipe 43 remains constant, and a larger amount of plasticizer is sprayed onto the filter media 4.

In another embodiment of the device, (FIG. 3), the automatic dispenser of the supplied plasticizer is made in the form of a brush 51 rotating on the shaft 50. The plasticizer is supplied to the brushes from the reservoir 52 by a distributor 53, such as a metering pump, through pipelines 54 and 55 without further increase in pressure due to the fact that the tank 52 is located at a higher level. In the tank 52, the plasticizer is fed through line 56 by pump 57 from tank 58, and through pipe 59, an excess amount of plasticizer is diverted back to tank 52, which

necessary to maintain a constant level of plasticizer in the pipe and thus a constant pressure in the pipeline 54.

The proposed device can be made (Fig. 4) with a nozzle 60 for removing the air flow that occurs when the tape is expanded, in which there is a separation plate 61 (Fig. 5). The air nozzle has a compressed air supply pipe 62 which is connected to an air supply source (not shown in the drawings) and passes into a wide funnel 63 having a base 64 with holes 65.

The separator plate 61 separates the air flow entering the funnel 63 by

two parts so that one part of the air flow is directed through the openings 65 across the ribbon of filter material and expands it. This part of the air flow is further directed to the guide plate 66 located opposite the air nozzle 60, and is reflected from it. The other part of the air flow passes through the channel 67 and through the filter media strip, withdrawing down the first part of the air flow exiting between the guide plate 66 and the nozzle 60.

Thus, due to the second air flow, an air curtain is created preventing the air flow from passing between the air nozzles and the guide plate 66 so that the first air flow does not flow into the device 2 to supply plasticizer to the filter media and does not affect the spraying process plastifikatoa.

The air nozzle shown in FIG. 6 is characterized in that between it and the plasticizer supply device 2, a suction device 68 is installed, by means of which an air flow is sucked out between the guide 69 and the nozzle 60 and directed in the direction of movement of the filter material belt 4. At the same time, the air flow does not get into the plasticizer supply device 2 and does not affect the process of supplying it to the mite of filter material.

The advantage of the proposed device is that the plasticizer coming from the spray nozzle completely goes to the moving belt of filter material. As a result, each

The filter section has the same hardness, which improves further processing. The rate of sweeping the ribbon of filter material and the supply of plasticizer to it are automatically controlled, and the air intended for expansion of the ribbon does not adversely affect the process of applying the plasticizer even when the expansion nozzle is located near the spray device.

Subject invention

Claims (4)

1.Device for applying liquid plasticizer to continuously moving a filtering material tape containing a device for expanding the filtering material tape, a plasticizer feeding device onto the tape, characterized in that, in order to ensure that the plasticizer is evenly distributed on the tape, a passage is installed in the plasticization feed zone in the plasticizer supply path filtering through the tape matepiala. 2. DEVICE under item 1, characterized in that. that in the plasticizer supply device there is an automatic distribution of the amount of plasticizer supplied. 3. The device according to claim 2, characterized in that the distributor is made in the form of a rotating brush. 4. The device according to claim. 1, characterized in that. that it contains a nozzle for diverting airflow that occurs when the belt expands, in which there is a separation plane that guides the airflow across the ribbon of filter material. UAA 19 b 6 fS J5 FIG. 6 If VE 68