SU787270A1 - Device for metering-out and packaging loose materials into heat-sealable film - Google Patents

Description

one

The invention relates to a packaging technique, namely, devices for dispensing and packaging bulk materials.

A device for metering bulk materials is known, comprising a rotatable metering drum with measuring containers and packing mechanism l).

A disadvantage of the known device is that with an increase in the rotational speed of the metering drum, the bulk material does not have time to completely fill the measuring containers, which leads to a sharp decrease in the metering accuracy.

The purpose of the invention is to increase the productivity and increase the accuracy of dosing.

This goal is achieved by the fact that the dosed drum is made hollow to feed the dosed material into it, and the packing mechanism contains a conveyor, enveloping the dosing drum and made in the form of a belt with cells covered by an elastic plate forming the cavity, each cavity being connected to a pneumatic system and has a valve.

FIG. 1 shows a device for metering and packing bulk materials in a heat-sealing film with a partial section, a general view, 5 in FIG. 2 shows section A-A in FIG. 1. The device comprises a frame 1, on which a dosing drum 2 is fixed, having measuring containers 3. The drum 2 is made empty to feed 10 into it a dosing material. Inside the drum is placed the cut-off 4.

The device also contains a packing mechanism that includes a conveyor made in the form of a belt 5 with cells 5 6. Cells 6 are covered with an elastic

plate 7, obrazukhdey cavity 8, while Ks1Zhda cavity is connected to the pneumatic system (n; drawing not shown), has a ball valve 9. Transport 20jpy are supported gears 10. On the base 1 installed electric motor 11 and gearbox 12 with chain gear 13.

On the frame, there are bobbin packers 25 and 14 and 15 with rolls of heat-sealing film and mechanisms 16 for unwinding the film, as well as nap rolls 17 for film, heating rollers 18, rollers 19 with cutting blades 30.

On the base 1 mounted hopper 20 and the vacuum distributing device .21, on the shaft 22 of the metering drum 2 is fixed drive sprocket 23 and sprocket 24 intermediate gear. In the body of the shaft 22 there is a channel 25.

The device works as follows.

The end of the heat seal film from the roll 14 is inserted between the pre-roll drum 2 and the belt 5 (Fig. 1). The end of the thermal film from the roll 15 is inserted between the rollers 17

Subsequently, unwinding of thermal sealing of the film is carried out by the mechanisms 16. The product from the hopper 20 spills into the interior of the metering drum 2, which rotates from the electric motor 11 through the gearbox 12, the chain gear 13, the drive sprocket 23.

When the metering drum rotates, the bulk material under the influence of centrifugal forces enters the measuring containers 3, the bottom of which is plastic film from the roll 14. When the metering drum rotates, the material in the measuring container separates from the material in the loading chamber cutter 4. After cutting off the material into air is sucked from the internal cavity 8 because the shaft of the dosing drum rotates and the channel 25 in front of the vacuum distributor 21 connects the internal cavity 8 to the vacuum pump, not showing on the drawings. Due to the narrowness of the openings B of the transfer belt, under the action of vacuum, the heat-sealing film deforms after the elastic belt plate and forms the concave half of the bag.

Material under the influence of centrifugal forces and SUL. excess atmospheric pressure leaves the measuring capacitance and enters the space formed during the deformation of the plate 7 and the heat-sealing film. Further, the dosed material moves along a horizontal portion of the conveyor. However, the entry of atmospheric air into the belt cells is difficult due to the presence of the 9x ball valve, while the deformation of the plate 7 remains throughout the entire length of the 3-section conveyor belt.

dosing occurs when it is filled with atmospheric air by passing it through the valve and leveling the elastic plate.

The film from the roll 15 covers the dosed material and in this state the heat-sealing films with the dosed material come under the heating rollers 18, which form the longitudinal seams along the edges of the tapes and the transverse seams between the doze ma- t. rial Heat-sealable films with the material later fall under the rollers 19 with cutting blades, where the film is cut into ready-made bags. The finished packages are removed from the delivery area by a conveyor not shown in the drawing. The conveyor, heating rollers and rollers with cutting blades are driven from sprocket 24 chain drives.

The use of the device of the proposed design makes it possible to significantly increase the productivity of packing bulk materials in small doses by 3–10 times. Dosing at high speeds occurs without decreasing the accuracy of the doses given. Under the influence of centrifugal forces, the material in dimensional containers is compacted, which reduces the metering error.

Claims (1)

1. The patent of France 2091766, cl. In 65 In 3/00, published. 1972. - -., "..- -.;.;,." - -: V. B ;;; v-. .. : {. 787270