Overall Working Process of a Paste Packaging Machine
A full-automatic paste packaging machine completes the entire packaging process through a PLC intelligent control system. The whole workflow includes material feeding, stirring anti-precipitation, quantitative piston filling, film forming, heat sealing, and finished product cutting. All steps run automatically in cycles to achieve continuous industrial production.
1. Material Feeding and Anti-Precipitation System
Most paste materials feature high viscosity and poor fluidity. Some pastes contain solid particles that easily sink and cause inconsistent material density. To solve this problem, standard paste packaging machines are equipped with a stainless steel hopper and automatic stirring device.
The continuous stirring design keeps the paste evenly mixed at all times, avoids material stratification, and ensures every filling dose maintains the same weight and texture. For special materials such as chocolate paste and low-temperature glue, an optional constant-temperature heating system can stabilize fluidity for smoother feeding.
2. Core Piston Volumetric Filling Principle
The piston filling system is the core technology that distinguishes paste packaging machines from liquid packaging machines. Gravity filling cannot adapt to thick paste, while pneumatic piston filling achieves precise quantitative filling suitable for all viscosity ranges.
Driven by stable pneumatic power, the piston moves back and forth with an adjustable stroke. When retracting, the piston absorbs paste into the measuring cylinder; when pushing forward, it quantitatively squeezes out the material. This mechanical filling method ensures high precision and is not affected by material viscosity changes.
Equipped with an anti-drip nozzle, the machine automatically closes the outlet after filling to effectively prevent residual paste from dripping and polluting packaging bags or machine surfaces.
3. Automatic Film Unwinding and Bag Forming
While the machine completes material metering, the film conveying system operates synchronously. The packaging roll film is automatically unwound with constant tension control to avoid deviation and wrinkles. The professional former folds the flat film into a standard bag shape, preparing for subsequent filling and sealing procedures.
4. Precision Filling and Heat Sealing Process
After bag forming and photoelectric positioning, the nozzle descends into the bag for safe and clean filling. Filling inside the bag effectively prevents paste contamination on the sealing edge.
After filling is completed, the vertical and horizontal heat sealing system works instantly. Constant-temperature heating ensures tight and firm sealing, preventing leakage or bag bursting caused by the weight of thick paste materials.
5. Cutting and Finished Product Output
The high-speed cutting device accurately cuts each finished bag according to the preset length. Finally, standardized paste sachets are automatically output, realizing fully unmanned continuous packaging production.
FAQ About Paste Packaging Machine Working Principle
Q1: Why can’t liquid packaging machines pack thick paste?
A: Liquid machines rely on gravity filling. Thick paste flows slowly and unevenly, causing inaccurate dosing and dripping. Paste packaging machines use piston forced filling to adapt to high-viscosity materials.
Q2: Does a paste packaging machine support pastes with particles?
A: Yes. Professional paste packaging machines are equipped with anti-blocking nozzles and stirring systems, suitable for chili paste, fruit jam, and granular condiments.
Q3: What materials can a paste packaging machine process?
A: It is widely used for honey, salad dressing, ketchup, chili sauce, body lotion, facial cream, pharmaceutical ointment, and various industrial pastes.
Final Conclusion
The stable performance of a paste packaging machine depends on its professional piston filling structure, anti-drip design, and anti-precipitation system. Understanding its working principle helps buyers avoid low-quality equipment and select the most suitable packaging solution for their production line.
If you are looking for high-efficiency and stable paste packaging equipment, feel free to contact our professional team for customized machine solutions.
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