Servo motor temperature control Flow Wrapping Machine for puffed food nuts and dry goods

Horizontal Flow Wrapper: Working Principle and Operational Technical Guide
I. Core Working Principle
The horizontal flow wrapper achieves horizontal packaging for block, strip, granular, and other materials through a continuous automated process of "film transport - formation & filling - heat sealing & cutting". Its core logic is to shape the film into a pillow-shaped bag, synchronously complete material conveying and filling, bag sealing, and fixed-length cutting, and finally form a "pillow-style" packaged product with sealed ends and bonded sides. It is suitable for mass packaging of various products in food, daily necessities, pharmaceutical, and other industries.
II. Analysis of Key Operational Technologies
1. Film Transport Mechanism
Film transport is the fundamental link to ensure packaging accuracy. It relies on dual controls of servo drive and photoelectric positioning to guarantee stable film operation and precise positioning:
Servo Drive Speed Control: After the roll film is unwound via the guide roller, the servo drive system precisely controls the film transport speed, with a tension control accuracy of ±0.5. This effectively prevents the film from wrinkling or stretching due to uneven tension, ensuring the subsequent formation effect.
Photoelectric Color Mark Correction: A high-sensitivity photoelectric sensor is configured to continuously monitor the printed color marks on the film. When the film deviates in position due to transport or stretching, the sensor automatically triggers a correction command, controlling the alignment error between the printed pattern and the bag within ±0.3mm to ensure uniform printing positions on the finished packages.
2. Formation and Filling Stage
This stage realizes the synchronous connection of "film-to-bag conversion + material bagging", with the core focusing on formation stability and material transport synchronization:
Film Formation: Guided and shaped by the former, the film is folded and pressed into a cylindrical bag structure with open ends. The diameter of the bag can be adjusted in advance according to the material size to ensure compatibility between the bag and the material, avoiding looseness or tightness.
Synchronous Material Filling: The synchronous conveyor belt gently feeds materials (such as biscuits, bread, tablets, etc.) into the cylindrical bag at a speed matching the film transport speed. Through the linkage control of the servo system and the conveyor belt, the speed deviation can be controlled within 1%, preventing material jamming, misalignment, or material damage caused by impact.
3. Heat Sealing and Cutting Unit
Heat sealing and cutting are crucial for ensuring package tightness and finished product integrity, achieving efficient sealing and cutting through the adjustment of dual parameters (temperature and pressure):
Vertical Heat Sealing: The vertical sealing device adopts constant temperature control technology, with the temperature adjustable within the range of 150-200℃ (adapted according to film materials such as PE, PET, composite film, etc.). This ensures sufficient fusion at the sealed area, with a sealing strength of ≥4N/15mm, effectively preventing material leakage and moisture intrusion in the package.
Horizontal Sealing & Cutting: The horizontal sealing and cutting knife integrates the dual functions of "sealing + cutting" and supports dual adjustments of temperature and pressure. While completing the horizontal sealing of the bag, it accurately cuts out individual pillow-style packaged products. The cutting edge is smooth without burrs, and the distance between the sealed edge and the cutting position is uniform, ensuring the appearance and tightness of the package.