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Packaging Machine Knives and Blades

Precision packaging blades and machine knives designed for high-speed packaging lines, delivering clean cuts, stable sealing performance, and consistent operation across films, laminates, paper, and foil materials.

Packaging Machine Knives We Manufacture

YISHI manufactures precision packaging machine knives for cutting film, foil, paper, and laminates on vertical form-fill-seal (VFFS), horizontal form-fill-seal (HFFS), flow wrap, pouch, and carton converting lines. Blades are produced from D2, M2, SKD11, and tungsten carbide grades, vacuum heat-treated to HRC 58–62 for edge retention and impact resistance. Dimensional tolerances are held to ±0.01 mm on critical surfaces, with surface finishes down to Ra 0.2 µm for clean cuts and reduced adhesive buildup. Every knife is supplied with a material certificate and inspection report.

Vacuum Heat-Treated Tool Steels
Blades are produced from D2 (Cr12MoV), M2 high-speed steel, or SKD11, achieving HRC 58–62 after vacuum quenching and multiple tempering cycles for dimensional stability.
Tight Dimensional Tolerances
Critical cutting edges and mounting surfaces are ground to ±0.01 mm, ensuring consistent cut quality and reduced setup time on multi-lane machines.
Low-Friction Surface Finish
Blade surfaces are finished to Ra 0.2–0.4 µm to minimize adhesive transfer from films and reduce friction heat during high-speed operation.
Custom Edge Geometries
Available with straight, serrated, scalloped, or perforating edges; edge angles optimized for specific film thicknesses (12–200 µm) and material types.
OEM Compatibility
Knives are reverse-engineered from OEM part numbers or customer drawings to fit Bosch, Rovema, Ilapak, Hayssen, and other major packaging machine brands.
Carbide Options for Abrasive Films
Tungsten carbide (YG8, YG10X) blades offer HRC 89–92 for extended life in cutting metalized films, abrasive papers, and recycled-content materials.
Full Traceability
Each blade is laser-marked with a heat lot number and supplied with a certificate of conformance showing material grade, hardness, and dimensional inspection results.

Take a Closer Look

VFFS Bagging Lines
HFFS Flow Wrapping
Pouch and Stick Pack Machines
Carton Converting
Label and Tape Slitting
Foil and Lidding Film Cutting

VFFS Bagging Lines
Straight and serrated knives for cross-cutting and sealing jaw stations on vertical form-fill-seal machines processing PE, PP, and laminated films at speeds up to 120 bags/min.
HFFS Flow Wrapping
Circular slitting blades and cut-off knives for horizontal flow wrap machines used in bakery, confectionery, and medical device packaging.
Pouch and Stick Pack Machines
Perforation blades and notch knives for easy-open features on stick packs and sachets, with precise tear propagation control.
Carton Converting
Slotting blades and creasing knives for corrugated box printer-slotter machines, made from D2 or HSS for long runs in recycled board.
Label and Tape Slitting
Circular shear slitting blades for pressure-sensitive adhesive tapes and label stock, with polished edges to prevent adhesive buildup.
Foil and Lidding Film Cutting
Tungsten carbide knives for cutting aluminum foil lidding and blister pack films, maintaining edge sharpness through abrasive oxide layers.

Technical Specifications

Dimensions	Circular blades: OD 50–400 mm, ID 15–100 mm, thickness 0.5–5 mm. Straight knives: length 50–1200 mm, width 10–100 mm, thickness 1–20 mm. Custom sizes available.
Materials	D2 (Cr12MoV), M2, SKD11, H13, HSS, tungsten carbide (YG8, YG10X), 9CrSi, 65Mn
Hardness	HRC 58–62 for tool steels; HRC 89–92 for carbide
Tolerances	±0.01 mm on cutting edges and mounting features; ±0.05 mm on non-critical dimensions
Surface Finish	Ra 0.2–0.4 µm on cutting edges; Ra 0.8 µm on blade bodies
Customisation	Buyers can specify dimensions, material grade, hardness, edge type, mounting hole pattern — including 3-hole razor blades — and coating (TiN, CrN). Provide OEM part number or CAD drawing for exact match.

Why Choose Yishi

YISHI operates in-house vacuum heat treatment and cryogenic processing to achieve precise hardness profiles without distortion. All blades are ground on CNC machines with automatic wheel dressing to maintain consistent edge geometry across production batches. We provide material certificates and dimensional inspection reports as standard. Custom knives are manufactured from customer drawings or OEM part numbers with no minimum order quantity, and prototypes are delivered within 10 working days.

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Frequently Asked Questions

What steel grade is best for cutting LDPE film?

D2 (Cr12MoV) at HRC 58-60 is commonly used for LDPE films up to 100 µm. For thinner films or high-speed lines, M2 HSS offers better edge retention. Provide film thickness and machine speed for a specific recommendation.
Can you match the dimensions of my existing Bosch packaging knife?

Yes. Send us the OEM part number or a dimensional drawing, and we will manufacture a replacement knife to the same specifications, including mounting hole positions and edge bevel angles.
What is the typical lead time for custom packaging knives?

Standard custom orders ship within 15 working days. Prototype orders for testing can be expedited to 7–10 working days depending on complexity.
Do you offer coatings for packaging knives?

We apply TiN (titanium nitride) and CrN (chromium nitride) PVD coatings to reduce friction and adhesive pickup. Coated blades are recommended for high-speed lines running sticky films or hot-melt adhesives.
What hardness range do you recommend for serrated blades?

Serrated blades are typically hardened to HRC 56–58 to balance edge sharpness with impact toughness. For abrasive materials, we can increase to HRC 60–62 using M2 steel.
How do I measure my existing knife for a replacement?

Provide the overall length, width, thickness, hole diameter and center distance, and edge angle. A photo or sketch with dimensions is sufficient for quotation.
Can you supply knives for intermittent-motion VFFS machines?

Yes, we manufacture knives for both continuous and intermittent-motion machines. Specify the machine model and cutting station for correct blade design.