包装機械用ナイフ

What do Packaging Machine Knives Mean?

Packaging machine knives, also known as packaging blades or form fill seal knives, are specialized cutting tools integrated into various types of packaging machinery. These knives perform a wide range of cutting and sealing functions essential for forming, filling, and sealing packages containing diverse products, from food and pharmaceuticals to industrial goods. The term “packaging machine knives” encompasses a broad category of blades designed for specific tasks within the packaging process, ensuring efficient and secure packaging.

Uses and Applications of Packaging Machine Knives

Packaging machine knives are integral to numerous automated packaging processes across various industries. Their key applications include:

• フォームフィルシール（FFS）機： Cutting and sealing flexible packaging films to create pouches, bags, and sachets. This includes horizontal and vertical FFS machines.
• フローラッピングマシン: Cutting and sealing the ends of wrapped products like candy bars, baked goods, and individual portions.
• サシェ包装機： Cutting and sealing small pouches or sachets containing powders, liquids, or granular products.
• ブリスター包装機: Cutting the formed blister cavities from the web and sometimes perforating or scoring the packaging.
• カートン包装機: Cutting and scoring cardboard blanks to form cartons and sometimes cutting and sealing inner bags or liners.
• ラベリングマシン: Cutting labels from a continuous roll or perforating label stock.
• シュリンクラッピングマシン: Cutting the shrink film after it has been wrapped around a product.
• 袋詰め機: Cutting the filled bags from a continuous roll of bagging material.
• 真空包装機： Cutting the excess film after vacuum sealing a product.

Common Materials for Packaging Machine Knives

The materials used for packaging machine knives must be food-grade where applicable, corrosion-resistant (especially for food and pharmaceutical packaging), and capable of maintaining a sharp and durable cutting edge to ensure clean and reliable cuts at high speeds. Common materials include:

• ステンレス鋼（例：304、420、440シリーズ）： Stainless steel is widely used due to its excellent corrosion resistance, ease of cleaning, and ability to be sharpened. Different grades offer varying levels of hardness and wear resistance. For direct food contact, 304 stainless steel is a common choice.
• 高速度鋼 (HSS) Provides improved wear resistance and can maintain sharpness at higher operating speeds, suitable for demanding packaging applications.
• 合金工具鋼（例：D2、A2）： Offers a good balance of hardness, toughness, and wear resistance, ideal for processing abrasive packaging materials or for high-volume production.
• Carbide-Tipped Blades: Feature tungsten carbide inserts at the cutting edge, offering exceptional hardness and wear resistance for cutting tough or abrasive packaging films and extending blade life significantly.

The blades are often precision ground and may undergo hardening and tempering processes to achieve the optimal balance of sharpness and durability. Surface coatings like titanium nitride (TiN) can be applied to enhance surface hardness, reduce friction, and improve wear and corrosion resistance.

Common Packaging Blades Shapes

Packaging machine knives come in a diverse range of shapes and edge configurations tailored to specific cutting and sealing mechanisms within different packaging machines:

• Straight Cut-Off Knives: Long, straight blades used to make transverse cuts across the packaging material to separate individual packages.
• Rotary Cut-Off Knives: Circular or disc-shaped blades that rotate to cut the moving packaging film.
• ショルダーナイフの形成： Shaped blades used in FFS machines to cut and shape the film as it passes over the forming shoulder.
• シーリングナイフ（クリンパー）: Often have serrated or profiled edges and may be heated to create a heat seal while simultaneously cutting the film.
• Tear Notch Knives: Small, shaped blades that create tear notches in flexible packaging for easy opening.
• Perforating Knives: Blades with teeth or специально designed edges to create lines of perforations for easy tearing or venting.
• Slitting Knives: Circular or straight blades used to slit the packaging material longitudinally.
• ダイカットブレード: ブリスターパックや成形ポーチなどの包装材の特定の輪郭をカットするために使用されるカスタム形状のブレード。
• Guillotine Knives: Straight blades used in a guillotine-like action for cutting stacks of packaging material or individual sheets.

The working principle depends on the specific type of packaging machine and the knife’s function. Cut-off knives typically shear the material against a stationary anvil or another moving blade. Sealing knives use heat and pressure to fuse the layers of film together while also severing the excess material. Rotary knives provide continuous cutting action. The precision of the blade shape, the sharpness of the cutting edge, the applied pressure, and the synchronization with the machine’s movement are all critical for achieving clean, accurate cuts and strong seals in the packaging process.

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If you don’t find the shear blade you are looking for, we can also customize it, see our 「カスタムブレード」 to learn how!

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