Horizontal Flow Wrapping Machine Serrated Blades

Industrial Knives and Blades for Packaging Industry

       Vertical packaging machines and horizontal flow wrap machines are core equipment in automated packaging. Their blades, as key cutting components, directly determine packaging efficiency and finished product quality. including vertical or horizontal form fill and seal blades, cup and tray forming sealer blades, sachet forming blades, tamper-evident blades, vacuum packaging blades, film wrapper zigzag blades, and flow wrapping toothed blades, vacuum, thermoformed and serrated packaging knives.Yafei Company is a leader in the industrial blade field, especially in the field of packaging machinery blades, with advanced production equipment and rich experience. Yafei specializes in manufacturing knives for flow wrap equipments. These knives usually have shapes such as straight teeth, helical teeth, serrations, zigzag and diagonals, as well as matching anvils. We can also customize knives with tear notches as needed.

1. Blades for Vertical Form Fill Seal Machines (VFFS Blades)

        Working Principle: Materials enter the bag tube from top to bottom, and the blade completes the horizontal sealing and cutting of the packaging bag in the vertical direction, forming a three-sided or four-sided sealed bag type.

   Blade Types and Characteristics:

   1.1.  Structural Design:

          - Mainly horizontal sealing and cutting knives, usually long strips with serrations (such as 3×3.5 or 4×4 triangular teeth). The reverse side is designed with a slope to form a V-shaped easy-tear opening.
          - Common specifications: 165×55×1.5mm, 240×70×2.5mm, etc. They are usually processed and customized according to samples and drawings.

   2.2.  Material and Process:

          - Material: Stainless steel (such as 440C/420J2), D2, high-speed steel are preferred, which take both corrosion resistance and wear resistance into account, with hardness reaching HRC 54-59.

          - Processing: High-precision wire cutting and CBN grinding wheel grinding are adopted to ensure sharp cutting edges and flatness of the plane ≤ 0.01mm.

   3.3.  Core Applications:

         - Applicable products: Granular/powdered food (coffee, condiments), daily chemicals (shampoo samples), pharmaceutical tablets and other small and light items that need to be packed in upright bags.

         - Functional requirements: The cut should be burr-free, easy to tear, and resistant to humid environments (such as frozen food packaging).

   4.4.  Maintenance Points: - Regularly clean residual film debris with alcohol and lubricate the knife holder bearings; check the cutting edge wear every shift and replace it in time. 

   
   

2. Blades for Horizontal Form Fill Seal Machines (HFFS Blades)

        Working Principle: The product is wrapped in a film into a "pillow shape", and the blade cuts off synchronously after horizontal heat sealing, forming a continuous assembly line packaging.

   Blade Types and Characteristics:

   1.1. Structural Design:

        - Composed of fixed blades and moving blades. Patterned knives (such as crocodile teeth, wave teeth) are common, used for synchronous indentation and cutting. - Specification examples: 130×10×4mm, 200×14×4mm, etc.

   2.2. Material and Process:

        - Material: Mainly high-speed steel M2, M35, M42, with hardness reaching HRC 61-63; cemented carbide can be selected for high-strength scenarios.

        - Heat treatment: Multi-stage tempering to reduce deformation, and the inner side of the teeth is polished to reduce friction.

   3.3. Core Applications:

        - Applicable products: Regular block items (biscuits, soap), industrial parts (hardware accessories), medicine boxes, etc. for high-speed line packaging (speed up to 230 bags/minute).

         - Functional requirements: It needs to withstand high-temperature heat sealing (about 180℃), and the cut should be flat with clear patterns.

   4.4. Maintenance Points:

         - Clean heat-sealing residues and lubricate the guide rail every week; regularly calibrate the parallelism of the blades to avoid incomplete cutting or offset sealing.

   
   

3. Industry Applications and Selection Suggestions

   - Food industry: Vertical blades are used for sauce packets (440C for rust prevention); horizontal serrated blades are used for cutting biscuits (high-speed steel for wear resistance).

   - Industrial/pharmaceutical: Vertical blades are used for cutting medicine plates (precision and burr-free); horizontal blades are used for packaging medical devices (patterns ensure sealing performance).

   - Selection notes:

   - For vertical packaging machines, stainless steel materials are preferred to cope with humid environments;  

   - For high-speed horizontal lines, cemented carbide is needed to extend service life. Yafei's packaging machinery blades can improve packaging efficiency by 15% and reduce material waste. Non-standard requirements (such as ultra-long knife holders) need to provide drawings for customization.