KB-Z Small-Bag Automatic Unpacker

Our company's unpacker is used for bagged powder and granular material bag-opening and discharging operations. It performs automatic bag opening and discharging of dry powder materials in industries such as chemicals, petroleum, building materials, metallurgy, electric power, food, pharmaceuticals, grain, and environmental protection, and can automatically open and discharge materials such as slaked lime, magnesium oxide, quartz sand, limestone, sawdust, milk powder, PVC powder, fly ash, urea, clay, gypsum, cement, and sewage-treatment additive powder, by automatically feeding bags via a belt conveyor, the bag-cutting device automatically opens the bags, and the vibrating screen automatically separates bags from material and discharges it; the material falls into the storage hopper by gravity to complete the bag-opening and discharging work. The dust generated during operation is filtered out by the built-in dust-removal device, allowing operators to work in a clean environment.

       The unpacker mainly consists of two parts: an inclined belt conveyor for feeding and the main machine. The feeding belt conveyor can be customized according to the site requirements, autonomously completing the conveying of bagged materials so that the bagged material enters the main machine's inlet. The main machine consists of a main cabinet, a bag-breaking device, a screening device, a material output device, a waste-bag output device, and a dust-removal device. The components of the main machine are introduced below, as shown in Figure 1.

Bag-breaking device: The main working part of the bag-breaking device is the cutter. Bagged powder and granular material is conveyed by the belt conveyor to a 45-degree inclined slide and slides down by gravity. During the descent, five rapidly rotating cutters slit the packaging bag in multiple lines, allowing the material to quickly separate from the waste bag. The cut waste bag and material slide into the trommel screen for screening. The inlet of the bag-breaking device, i.e., the material inlet, is equipped with a PVC curtain to prevent material from splashing out of the cabinet.

Screening device: In the screening device, the trommel screen wall is covered with screen holes, and the screen plate surface is fixed with 6 movable inclined plates that act as an internal screw. The waste bag and material enter the trommel screen, which rotates at low speed, accelerating the material to pass through the screen holes into the cone hopper, while the waste bag is conveyed by the internal screw of the trommel to the drum outlet and drops into the waste-bag conveyor.

Material output device: The material in the cone hopper enters the screw conveyor in the material output device; the conveyor rotates the screw shaft to convey the material out of the machine and into the next process.

Waste-bag output device: The waste bags coming out of the drum are conveyed by the shaftless screw in the waste-bag output device to a long cylindrical bag outside the fully automatic unpacker for collection and processing. When the long bag is full, it is manually replaced.

Dust-removal device: The dust-removal device of the fully automatic unpacker is an integrated pulse-jet dust collector, arranged above the automatic unpacker. It is small in size and highly efficient; a quick-open access door is provided on top for convenient maintenance and bag replacement; a large-flow pulse-jet valve ensures clean and rapid cleaning, guaranteeing dust-removal efficiency and extending bag life.

The automatic unpacker cabinet has observation windows on both sides for convenient observation of internal operation. Access doors are provided on both sides of the observation windows and above the waste-bag conveyor for convenient machine installation and fault maintenance.

This machine is easy to operate, with sensitive and reliable stopping.