Plastic Industry Slitting And Cutting Blades

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Plastic Industry Slitting And Cutting Blades

The cutting and slicing blades in the plastic industry are widely used in the packaging industry, electronics industry, and recycling field. They can achieve industrial waste treatment, precision component production, and are essential components for diversified processing in the plastic industry.

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Application Of Slitting And Cutting Blades In The Plastic Industry

1.Industry application of slitting blades

1)Packaging industry: Cutting blades are used for producing food packaging films, plastic bags, etc., requiring high cutting accuracy and no burrs.

2)Electronics industry: When cutting electronic materials such as insulating films and conductive films, wear-resistant blades should be used to reduce dust pollution.

3)Recycling field: The plastic film shredder blade can cut the waste film into small pieces, which is convenient for subsequent melting granulation or direct recycling.

4)Material type adaptation:

Plastic film:	Flat and round blade slitting machines are widely used for precise slitting of PE, PP, PVC and other films, ensuring that the width and edge flatness of packaging materials meet production requirements.
Composite film and metal foil:	Round blades (such as slitting machine round blades) are suitable for cutting aluminum foil, copper foil, and multi-layer composite films, reducing material deformation through high-speed rotation.
High viscosity material:	The pneumatic slitting knife can handle soft PVC, adhesive tape and other materials, and achieve stable cutting through air pressure regulation.

5)Process requirement adaptation

Thin walled material cutting:	Long strip blades or elastic blades are used for cutting plastic sheets and films, with low cutting resistance and low energy consumption.
Hard plastic cutting:	Alloy embedded blades are suitable for engineering plastics (such as ABS, PC) or materials containing fiberglass, improving wear resistance and extending lifespan.
Alien cutting:	Irregular blades (such as wavy or trapezoidal) can be customized for cutting special products such as pipes and irregular parts.

6)Typical Scenario

Industrial waste treatment:	The shredder blade is used to cut waste plastic products (such as plastic film and pipes) to improve recycling efficiency.
Precision component production:	Combination blade (main blade+auxiliary blade) synchronously completes rough cutting and finishing of plastic parts, meeting high-precision requirements

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Cutting Blade Types And Applicable Scenarios‌

type	design characteristics	advantage
Square knife cutting	The blade is fixed on the knife holder and can be vertically cut by lifting and lowering. It is suitable for general plastic films such as ABS and PE, and is recommended to use double-sided blades for cutting thicknesses below 70 μ m (to improve edge flatness)	Suspended slitting operation is convenient and suitable for thin materials (such as 0.01-0.1mm aluminum foil)
Round knife cutting	Hard alloy (YG8-YG15) or high-speed steel (W6Mo5Cr4V2), with a wear resistance life 5 times that of ordinary steel, suitable for continuous slitting production lines (such as BOPP film, metallized film)	Dynamically adjust the blade spacing (0.1-0.3mm) and optimize the cutting accuracy in conjunction with the sieve mesh frame

Classic Case

PE film slitting	The circular blade slitting machine cuts large rolls of PE film into packaging films with a width of 3-5mm, with smooth edges and no burrs
ABS electronic waste cutting:	The combined blade synchronously completes crushing and cutting, with a particle accuracy of ± 0.2mm, and is directly used for injection molding raw materials.
PVC pipe cutting:	Customized cutting of pipe waste with irregular blades, suitable for the production of recycled particles in the construction industry.

By adapting the types and process parameters of slitting and cutting blades, the diverse processing needs of the plastic industry can be efficiently met.

Material And Performance‌

Type	Material	Applicable scenarios
High speed steel cutting knife	W6Mo5Cr4V2（HRC55-58）	Intermittent cutting of bubble wrap and PE sheet
Alloy tool steel blade	Cr12MoV（HRC58-62）	High load cutting of mixed plastics containing impurities
Hard alloy coated knife	Tungsten carbide matrix (YG series)	Industrial grade continuous operation (such as PVC woven bags)

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Blade Selection

Cutting scenario: For high-speed continuous cutting, circular blades are preferred; High viscosity materials are suitable for pneumatic slitting knives.

Cutting scene: Hard materials are selected with alloy edged blades; Thin walled materials are recommended with elongated blades.

Function Optimization

Adjustable knife holder: supports vertical cutting position adjustment (such as bubble film cutting device), suitable for different size requirements.

Multi claw interlocking design: reduces material adhesion (such as nylon/PVC scraps) and improves cutting stability.

Maintenance Points

Regularly clean the surface residue of the blade to avoid material adhesion affecting cutting quality.

Check the wear of the blade, and replace the hard alloy blade locally to reduce costs.

When cutting high hardness materials, it is necessary to control the cutting pressure to prevent blade breakage.

Plastic slitting and cutting blades need to be selected comprehensively based on material characteristics (thickness, hardness), operating mode (intermittent/continuous), and cost budget:

Cutting scenario: For thin films, circular cutting is preferred (for hard alloy materials), while for thick plates, square cutting is preferred (for Cr12MoV alloy steel).

Cutting scenario: For high-precision requirements, an adjustable tool holder scheme is recommended, and for mixed materials, multi jaw staggered blades are recommended.

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