Silica powder packaging machine
Saturday November-29 2025 13:57:42
Silica powder packaging machine efficiently completes bag making, metering, filling, and sealing of silicon powder. Equipped with a screw feeding system driven by a servo motor and combined with real-time feedback from an electronic scale or load cell, the machine achieves a silicon powder weighing accuracy of ±0.1%~0.2%, minimizing the error per bag.
Depending on the model, a single machine can package 200–500 bags per hour, with a packaged silicon powder weight range of 5–50 kg. It can also be expanded to ton bags weighing 500–1000 kg. Applicable packaging types include valve bags, open bags, zipper bags, stand-up pouches, and four-side seal bags. The Silica powder packaging machine features automatic bag feeding, automatic metering, bag clamping, compaction, conveying, heat sealing, and dust removal functions, adapting to the characteristics of small-sized silica powder particles, easy bridging, and easy dispersion.
Silica Powder Packaging Machine Workflow
The following is the entire packaging process of the silica powder packaging machine from bag feeding to sealing. A robotic arm or suction cup device automatically retrieves a bag from the bag magazine and places the empty bag over the filling port, while a vacuum suction cup or air blowing device opens the bag opening. The pneumatic clamps at the filling port clamp and seal the bag opening to prevent dust escape. Subsequently, a high-precision screw feeder starts, performing rapid, high-flow filling and slow, precise metering filling to ensure a balance between speed and accuracy. During this process, the Silica powder packaging machine's built-in anti-bridging device continuously operates to ensure smooth material feeding. After filling, the bag shaping mechanism taps or squeezes the packaging bag to expel air, ensuring a flat and aesthetically pleasing finished bag shape and improving stacking stability. The bags are heat-sealed, sewn, or tied according to their shape, and the date and batch number are simultaneously printed or labeled. The finished bags are then conveyed out and can be directly connected to a robotic palletizing system to form an unmanned packaging production line.
Advantages of the Silica Powder Packaging Machine
The Silica powder packaging machine incorporates a sealed feeding port, a negative pressure dust collection hood, and a two-stage sealing structure, preventing silica powder from spreading and wasting during filling, feeding, and bag opening shaking. Because silica powder is light and fluffy, its accuracy is poor under conventional gravity filling. Therefore, the machine is equipped with negative pressure dust collection ports at key locations such as the filling port and hopper, connected to an industrial dust collector to promptly remove overflowing dust and return it to the hopper, achieving material recovery. The machine uses a double-helix structure; the main helix provides coarse and fast feeding, while the secondary helix provides fine and slow feeding, ensuring both speed and high precision. The helices are typically specially polished and treated to reduce adhesion. Parts of the machine that come into contact with the material use antistatic materials and are equipped with static eliminators to effectively neutralize charges and reduce material adsorption.
Types of Silica Powder Packaging Machines
There are many silica powder packaging machines on the market. Below, they are categorized into three common types based on packaging speed. Valve-mouth packaging machines and open-mouth packaging machines have similar packaging speeds, while screw-type metering packaging machines are high-speed machines, packaging faster than the other two types.
Valve-mouth Packaging Machines packing speed is approximately 4-8 bags/minute, with a typical packaging weight of 20-50 kg/bag. This type of packaging is used for valve bags such as gluing-bottom bags and square-bottom bags, eliminating the need for sewing after packaging. It uses a screw or impeller feeding method and has a compact structure. A bag clamp seals the bag opening to the filling port, minimizing silica powder leakage. Suitable for powders with good flowability, it is the mainstream model for silica micropowder packaging.
Open-mouth Packaging Machines packing speed is approximately 6-12 bags/minute. Packaging weight can range from 5 kg to 50 kg. This type of packaging is suitable for open bags such as sewn bags and heat-sealed bags. It typically consists of a feeding mechanism, a weighing unit, and a bag clamping device. During packaging, the bags are left open; after filling, an additional sewing or sealing machine is required to seal them. Some models are equipped with a dust collection interface to collect silica dust.
The screw metering packaging machine is suitable for 5–50kg open bags, with a speed of 8–20 bags/minute. The equipment consists of a feeding hopper, an adjustable screw feeder, a precision weighing sensor, and a PLC touch screen controller. The screw speed is variable to achieve different feeding amounts and ensure stable metering. After weighing, the machine automatically releases the bags and seals them or transfers them to the sewing machine. The machine body and parts in contact with silica powder are mostly made of stainless steel. It features a pneumatic bag gripping device, a bag opening positioning device, and an easily calibrated vent valve. It is also equipped with a dust collection and recovery system, a negative pressure dust collection interface, explosion-proof grounding, and a safety door interlock for easy cleaning and maintenance.
Case Studies of Silica Powder Packaging Machines
In the electronic materials field, Silica powder packaging machines provide precise, dust-free packaging of semiconductor silicon micropowder and spherical silicon micropowder in 25kg valve bags. In the chemical industry, they have successfully packaged materials with similar properties such as silica, fumed silica, and fine powders. In the building materials field, they are used to package silica fume for concrete and sealants, providing moisture-proof packaging to maintain its activity and improve the strength and durability of building materials. In the coatings and paints industry, they precisely meter and package silica micropowder for matting agents, helping customers achieve stable product ratios and ensuring consistent matte finishes.
As a high-speed packaging machine for silicon powder, Silica powder packaging machines help users save time in silicon powder packaging. Suppliers of Silica powder packaging machines typically have non-standard customization capabilities. They can customize specific filling head heights, conveyor line lengths and layouts, special sealing methods, interfaces for integration with existing production lines, and special bag-loading mechanisms to accommodate non-standard bag types, based on the specific needs of the silicon powder being packaged. After-sales service response speed and spare parts supply capabilities are reliable.
