Weigh batcher with vertical screw feeder HD-20-V

Weighing platform batcher with auger feeder is designed for weighing of dust-forming (dusting) bulk products into finished containers or packages (packages, bags, boxes, cans, bottles). It operates in semi-automatic mode and requires the operator to install containers, give a command to start batching, and collect filled containers. The equipment is used for packing and packaging starch, powdered sugar, chalk, flour, toner, etc., with a capacity of up to 1000 doses per hour.

Additional information

Characteristic

Power supply, V/Hz	380/50
Electricity consumption, kW/hour	2
Pneumatic supply**, atm./l.min.	absent
Length/Width/Height (not more than), mm	1700/1200/2200
Weight (not more than), kg	160
Productivity (max.)*, packs/hour	500-600
Volume of storage bin, l	100
Dosage range, g	1000 – 5000
L/W of package (max), mm	400/240

* Performance depends on dose weight and properties of the dosing product.

Job Description

The product to be dosed is poured down the inclined walls of the bin to a horizontal pipe located at the bottom. An auger passes through the pipe, one end of which is fixed in the electric drive. Pouring into the pipe, the product fills the cavities between the screw surface of the auger and the inner surface of the pipe.

When receiving a signal to start operation (the operator pressing a button or pedal), the Libra controller located in the control unit supplies power to the electric drive, which begins to rotate the auger.

As it rotates, the auger moves the product to be dosed (along its screw surface) from the bin to the nozzle, through which the product is poured into a package (container) installed on the weighing table. The container filled with the product creates pressure on the weighing table, which is attached to the frame of the equipment on strain gauges (strain gauges).

The Libra controller monitors the achievement of the set weight indicators (dose size) by the package using the signal from the load cells, changing the auger operation modes: from the moment the dose is dispensed until the set threshold value, the auger rotates quickly (coarse dosing mode), and after reaching the threshold value, the auger speed decreases and the product is added (fine dosing mode).

The use of these two modes is necessary to ensure sufficiently high productivity while eliminating the dose overrun: the coarse dosing mode ensures fast filling of the package, and the fine dosing mode eliminates accidental overrun of the dose. The auger rotation speed in these modes is determined by the values set on the frequency converter.

When the set weight parameters (dose size) are reached, the controller stops the auger rotation and stops dispensing the product into the package. The operator must replace the filled package (container) with an empty one, after which he can again give a signal to start work (by pressing a button or pedal), continuing the dosing process.

Peculiarities

The dispenser is optimal for dosing powdered dust-forming (dusting) products (flour, powdered sugar, starch, chalk, toner). The dispenser is capable of dosing other free-flowing products, including non-dust-forming ones, but the presence of a screw that moves the product in a closed space (pipe) directly to the package and, as a result, reduces dust formation, leads to the fact that the dispenser is mainly used for dosing dust-forming bulk products. It is not applicable for large-fraction products, fragile and sticky products that can jam the screw or crumble during dosing.

The weighing dispenser allows you to arbitrarily change the portions of the packaged product, as well as achieve fairly accurate dosing. Unlike volumetric dispensers, it has no restrictions on changing the product being dosed. The vertical arrangement of the screw allows for more high-quality and accurate dosing of the product, and the presence of a stirrer reduces the likelihood of the product sticking to the walls of the storage bin.

This equipment is produced in one model HD-20-B, with modifications according to the dosage weight parameters and overall dimensions of the packaging.