25kg calcium carbonate powder packing machine

The 25kg Calcium Carbonate Powder Packing Machine converts bulk fine powder into standard 25kg bags, completely solving the problems of slow manual weighing, uneven weight distribution, and dust spillage. It has an hourly output of 200-400 bags, is compatible with both valved and open bags, and can seamlessly integrate with medium to large-scale grinding production lines.

The machine automates packaging in four steps: bags are hung manually or by a robotic arm; a pneumatic bag clamping device locks the bag opening; a dual-speed screw conveyor quickly discharges the material, automatically switching to slow filling at 90% weight; a weighing sensor monitors in real time, and the valve immediately closes when the bag is full; a pneumatic mechanism pushes the bag, which slides down a chute into the downstream conveyor belt.

What are the benefits of a 25kg calcium carbonate powder packaging machine?

Industrial-grade calcium carbonate powder has complex physical properties. The 25kg calcium carbonate powder packing machine uses a mechanical structure to reduce dust and clogging problems during packaging.

The machine features a double-layer sealed bag clamp around the unloading head, utilizing a 75mm negative pressure exhaust port to draw overflowing dust back into the bag filter, effectively preventing dust hazards. A metal degassing pipe is installed inside the feeding hopper, working in conjunction with a high-frequency vibrating plate below the bag clamping seat to remove air during filling and simultaneously compact the material, reducing the volume of the 25kg package by 15% and resolving the transportation bottleneck of bulky, difficult-to-stack bags. Addressing the persistent problem of micron-sized powders bridging and clogging at the cone-shaped structure, a pneumatic anti-bridging hammer is installed on the hopper wall. The control system periodically and quantitatively impacts the hopper wall to break up the bonding structure, ensuring smooth powder flow.

25kg Calcium Carbonate Powder Packaging Machine Structural Details

The machine's SUS304 stainless steel variable frequency feeding screw has a polished surface. The main shaft adopts a dual-pitch design: a coarser pitch at the front for fast charging and a finer pitch at the rear for slow charging to reduce residue. The weighing suspension uses a three-point suspension structure to avoid transmission vibration interference, and a dustproof cantilever beam sensor transmits signals to the terminal in milliseconds. The fully pneumatic bag clamping seat is covered with wear-resistant rubber pads and driven by two 63mm diameter cylinders, capable of withstanding a downward pull of 50 kg to prevent slippage. The double-sealed control box integrates a Siemens controller and an isolated voltage regulator to resist voltage fluctuations caused by the start and stop of a high-power motor.

Model Parameter Table

The above parameters are for standard workshop configuration. Due to differences in bulk density and mesh size between heavy and light calcium carbonate, the screw spacing and degassing frequency can be adjusted according to the material sample. Please contact our engineers for customized technical solutions.

How much does a 25kg calcium carbonate powder packaging machine cost?

The price range for this machine is typically between $8,500 and $32,000, with the price difference determined by technical factors such as the degree of automation, the number of discharge ports, and the material grade.

Semi-automatic models with manual bag hanging and pushing are less expensive, while fully automatic systems integrating automatic bag loading and folding/sewing have significantly higher costs due to the doubled number of components. The single-nozzle model with a capacity of 4 tons per hour has a lower cost, while the double-nozzle model with a capacity of 8 tons per hour has a higher price due to the increased use of sensors and consumables. The all-carbon steel painted model is inexpensive, while the model with the material contact surface upgraded to 3mm thick SUS304 stainless steel has a raw material procurement cost thousands of dollars higher.

Application Industries of the 25kg Calcium Carbonate Powder Packaging Machine

The 25kg calcium carbonate powder packaging machine can be used in non-metallic mineral processing and basic raw material manufacturing industries. In heavy, light, and nano-calcium carbonate grinding and deep processing lines, it serves as a quality control device before shipment. Besides calcium carbonate, it is also compatible with talc, kaolin, gypsum powder, titanium dioxide, bentonite, and building mortar powder. Inorganic mineral powders with a fineness between 200 mesh and 5000 mesh and an apparent density between 0.4 and 1.2 g/cm³ can be directly used.

25kg Calcium Carbonate Powder Packaging Machine and Supporting Equipment

The 25kg calcium carbonate powder packaging machine can also be used in production lines, such as in conjunction with tubular chain conveyors, screw feeders, and conveyor belts. For example, upstream, a tubular chain conveyor delivers powder from a large hopper to a buffer hopper at the top of the packaging machine in a dust-free manner. After weighing and bag dropping, the powder falls down a slope onto a belt conveyor, where it is sealed by an automatic folding machine or a heat-sealing machine. Subsequently, a bag-turning machine and a roller leveling machine flatten the originally bulging bags into flat squares. Finally, a weight detection machine removes defective products, and the qualified bags enter the robotic palletizing station, where they are neatly stacked on pallets according to a set matrix.

Frequently Asked Questions

Q: Will the weighing accuracy decrease when the material fineness reaches 3000 mesh?

A: No. The variable frequency screw will adaptively adjust the speed of the slow feeding, fixing the error within ±50 grams by extending the micro-feeding time by 0.5 seconds.

Q: What is the lifespan of the mechanical seals under calcium carbonate wear?

A: The spiral bearing end face uses a double mechanical seal of air seal and labyrinth type. When the air source pressure is maintained at 0.2MPa, dust cannot enter the bearing interior. The designed service life is 18,000 hours.

Q: Can valve bags and open bags be used interchangeably on the same machine?

A: They cannot be used interchangeably. Valve bags rely on internal pressure filling through a tubular discharge nozzle, while open bags require external clamps to open the bag opening. You need to confirm one of the discharge head structures when purchasing.

The 25kg calcium carbonate powder packing machine standardizes the production process from bulk fine powder to standard packaging. Through pneumatic sealing, vacuum degassing, and variable frequency dual-speed feeding technology, it improves dust, bag swelling, and quantitative error problems during the powder filling stage. A reasonable mechanical configuration not only stabilizes production capacity but also, through integration with conveying and palletizing equipment, establishes a highly efficient digital downstream packaging line for ore processing enterprises.