I. Equipment Definition & Core Positioning​

The Flour/Salt/Sugar Paper Bag Packing Machine is an automated packaging device specifically designed for powdery and small granular food raw materials. Its core function is to realize the full-process automated operation from material metering, paper bag supply, precise filling to sealing and forming. Widely used in flour mills, sugar factories, salt companies and food processing enterprises, this equipment is compatible with environmentally friendly packaging materials such as kraft paper, white cardboard and composite paper. It can meet the packaging requirements of different specifications ranging from 500g to 50kg, serving as a key link connecting production and circulation.​

II. Core Structure & Component Configuration​

1. Main Structure​

• Frame & Contact Parts: The whole machine is made of stainless steel (carbon steel with spray coating optional for some models). All parts in contact with materials comply with food-grade standards (FDA/EU certification). Equipped with an aluminum profile frame safety door, it balances hygiene and operational safety.​

• Control System: Centered on a PLC (Programmable Logic Controller), paired with a touchscreen HMI (Human-Machine Interface), it integrates parameter storage, fault alarm and position display functions, supporting quick switching of process parameters for multiple products.​

2. Key Functional Modules​

• Feeding & Metering System:​

• For powdery materials (e.g., flour): Adopts a servo motor-driven screw metering device, combined with an agitator to prevent caking, with a metering accuracy of ±0.5%~±1%;​

• For granular materials (e.g., salt, sugar): Cup metering or load cell metering is optional to adapt to materials with different fluidity;​

• Silo Design: Equipped with a negative pressure dust-proof device (negative pressure up to -0.8kPa) to reduce dust pollution.​

• Paper Bag Supply System: Supports automatic feeding of prefabricated paper bags. A magazine-type bag feeding mechanism stores a sufficient number of paper bags, and the horizontal bag feeding method improves stability. It is compatible with multi-specification paper bags with a width of 70~400mm and a length of 250~1200mm.​

• Filling & Forming System: Includes automatic bag opening, material filling and vibration compaction functions. Some models are equipped with anti-clogging discharge nozzles to ensure smooth filling of powder/granules. Through a folding mechanism, the top side of the bag is folded and sealed with cold glue/hot melt glue to form brick-shaped or square finished bags.​

• Detection & Safety System: Integrates multiple protection mechanisms—no filling without bags, no operation if the bag mouth is not opened, and automatic shutdown in case of abnormal air pressure. Fault information is displayed on the control panel in real time, reducing material loss and equipment damage risks.​

III. Standardized Workflow​

1. Parameter Presetting: Set packaging weight (1kg~50kg), speed (2~25 bags/minute), sealing temperature and other parameters through the touchscreen, and call the stored product process plan;​

2. Paper Bag Supply: Prefabricated paper bags are sequentially transported to the workstation by the bag feeding mechanism, and pneumatic clamps accurately position and open the bag mouths;​

3. Material Metering: Materials in the silo are transported to the weighing unit through screws/cups, and feeding stops when the preset weight is reached;​

4. Filling & Sealing: The metered materials are injected into the paper bag, the vibration device assists in material compaction, and then the top folding and glue sealing of the bag are completed. Some models can realize synchronous coding (production date/traceability code);​

5. Finished Product Output: The sealed paper bags are output through the conveyor belt. Optional stackers and heat shrinkable machines can be configured to complete subsequent finishing processes.​

IV. Core Technical Parameters (Mainstream Model Reference)​

​

​

V. Application Scenarios & Core Advantages​

1. Typical Application Fields​

• Food Industry: Packaging of flour, corn starch, white sugar, rock salt, monosodium glutamate, etc.;​

• Agricultural Products: Packaging of grain powder, soybean meal, feed additives (granular/powdery);​

• Chemical Industry: Packaging of non-toxic chemical powders (e.g., baking soda, detergent powder) with paper bags.​

2. Core Competitive Advantages​

• High Automation: Reduces manual intervention by 80% compared with manual packaging, significantly improving production efficiency and reducing labor costs;​

• Precise Metering: Adopts servo control and high-precision sensors to ensure packaging weight consistency, reducing material waste;​

• Hygiene & Environmental Protection: Food-grade contact materials and dust-proof design meet food safety standards; paper bag packaging is biodegradable, conforming to environmental protection policies;​

• Strong Adaptability: Supports multi-specification packaging switching and is compatible with different types of paper bags, adapting to the production needs of small-batch and multi-variety products;​

• Stable & Reliable: Mature mechanical structure and intelligent fault diagnosis system ensure a continuous operation rate of over 95%, reducing maintenance downtime.