Custom Plastic Crusher Blade Manufacturer & Supplier

High-Performance Tungsten Carbide and Precision Tool Steel Knives for Global Industrial Recycling & Polymer Processing

Global Recycling Trends

Macro-Industry Challenges in Modern Polymer Crushing

The surging global demand for plastic recycling, driven by stringent mandates like the European Union's Circular Economy Action Plan and global ESG targets, has transformed the technical requirements of industrial shredder and crusher blades. Modern processing facilities no longer deal only with clean, post-industrial scrap. Instead, the focus has shifted toward highly abrasive, contaminated post-consumer plastic waste (PET, HDPE, PVC, WEEE scrap, and fiber-reinforced polymers).

Processing these complex materials causes severe wear on traditional tool steel blades, leading to rapid edge dulling, cracking, and excessive downtime. As a premium manufacturer,四川省申工硬质合金刀具有限公司 (Sichuan Shen Gong) develops high-toughness, wear-resistant carbide grades and tailored metallurgical solutions to increase blade longevity, ensure consistent pellet quality, and minimize power consumption.

Industrial Shredder and Crusher Processing Tech
Metallurgy & Engineering Expertise

Material Science: Choosing the Right Blade Metallurgy

How material chemistry dictates wear rates, impact resistance, and edge retention under demanding thermal and mechanical loads.

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Tungsten Carbide (WC-Co)

Featuring extreme hardness (HRA 88-92) and wear resistance. Ideal for processing abrasive fiberglass-reinforced plastics or clean pelletizing, where edge sharpness determines the purity of the cut and prevents polymer stringing.

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Premium Tool Steel (D2 / H13)

Offers high fracture toughness to withstand heavy impacts from un-crushed contaminants (such as metals or stones) in post-consumer waste streams. Shen Gong applies customized heat treatment processes to maximize surface hardness without sacrificing core strength.

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TiCN-Based Cermets & Coatings

Designed for high-speed cutting where thermal degradation is a risk. Cermets and special PVD coatings reduce friction at the blade tip, preventing polymer adhesion (melting) and extending continuous runtimes by up to 200%.

1998
Established Year
20+
Years of Carbide Expertise
1280px
Standard Width Layout
100%
In-House Manufacturing
ADVANTAGE PRODUCTS

Carbide blades for a wide range of industrial slitting applications

Engineered to support precise cutting and slitting across a broad spectrum of manufacturing processes.

Chemical Fiber Cutting Blade
Chemical Fiber Cutting Blade
Coil Slitting Knife
Coil Slitting Knife
Corrugated Slitter Scorer Knife
Corrugated Slitter Scorer Knife
Crusher Blade
Crusher Blade
Film Razor Blades
Film Razor Blades
Li-Ion Battery Electrode Knives
Li-Ion Battery Electrode Knives
Rewinder Slitter Bottom Knife
Rewinder Slitter Bottom Knife
Tube & Filter Cutting Knife
Tube & Filter Cutting Knife
Sichuan Shen Gong Carbide Knives Co. Ltd.
ABOUT SHEN GONG

MAKE SHARP EDGE ALWAYS IN REACH

Sichuan Shen Gong Carbide Knives Co., Ltd. was established in 1998. Located in southwest of China, Chengdu, Shen Gong is a national high-tech enterprise specializing in the research, development, manufacturing, and sales of cemented carbide industrial knives and blades more than 20 years.

Shen Gong boasts complete production lines for WC-based cemented carbide and TiCN-based cermet for industrial knives and blades, covering the entire process from RTP powder making to finished product.

Since 1998, SHEN GONG has grown from a small workshop with just a handful of employees and a few outdated grinding machines into a comprehensive enterprise specializing in the research, production, and sales of Industrial Knives, now ISO9001 certified. Throughout our journey, we’ve held fast to one belief: to provide professional, reliable, and durable industrial knives for various industries.

Striving For Excellence, Forging Ahead With Determination.

Our Services & Solutions

Global Service Capabilities & Value Added Benefits

From concept to cutting-edge performance, we back our manufacturing with scientific support and optimized logistics.

OEM Production

OEM Production

Production is carried out in accordance with the ISO quality system, effectively ensuring stability between batches. Simply provide your samples to us, we do the rest.

Solution Provider

Solution Provider

Rooted in knife, but far beyond knife. Shen Gong's powerful R&D team is your back-up for industrial cutting and slitting solution.

Analysis

Analysis

Whether it's geometric shapes or material properties, Shen Gong provides reliable analytical results.

Knives Recycling

Knives Recycling

Cherishing the finite, creating the infinite. For a greener planet, Shen Gong offers re-sharpening and recycling service for used carbide knives.

Quick Reply

Quick Reply

Our professional sales team offers multilingual services. Please contact us, and we will respond to your request within 24 hours.

Worldwide Delivery

Worldwide Delivery

Shen Gong has long-term strategic partnerships with several globally renowned courier companies, ensuring fast worldwide shipping.

Specialized Applications

Industrial Sectors We Serve

Customized blade geometries and materials engineered for specific industrial applications.

RUBBER/PLASTIC/RECYCLING

RUBBER/PLASTIC/RECYCLING

Shen Gong's high-toughness carbide materials are specially developed for producing pelletizing knives in plastic and rubber manufacturing, as well as shredding blades for waste recycling.

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CHEMICAL FIBER/NON-WOVEN

CHEMICAL FIBER/NON-WOVEN

Razor blades designed for cutting synthetic fibers and non-woven materials deliver superior performance due to their exceptional edge sharpness, straightness, symmetry, and surface finish, resulting in better cutting performance.

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FOOD PROCESSING

FOOD PROCESSING

Industrial knives and blades designed for meat cutting, sauce grinding, and nut crushing processes, meeting food-grade purity standards.

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MEDICAL

MEDICAL

High-precision industrial knives and surgical-grade blades manufactured with strict tolerance control for medical device manufacturing.

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METAL MACHINING

METAL MACHINING

We provide TiCN based cermet cutting tools for steel part semi-finish to finish machining, very low affinity with ferrous metals results in an exceptionally smooth surface finish during machining.

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CORRUGATED

CORRUGATED

Shen Gong is the world’s largest manufacturer for corrugated slitter scorer knives. Meanwhile, we provide resharpening grinding wheels, cross-cut blades and other parts for corrugated industry.

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PACKAGING/PRINTING/PAPER

PACKAGING/PRINTING/PAPER

Shen Gong's advanced carbide material technology delivers exceptional durability, and we offer specialized treatments such as anti-adhesion, corrosion resistance, and dust suppression for knives used in these industries.

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LI-ION BATTERY

LI-ION BATTERY

Shen Gong is the first company in China to develop precision slitting knives specifically designed for lithium-ion battery electrodes. The knives feature a mirror-finish edge with absolutely no notches, effectively preventing material sticking at the cutting tip during slitting.

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SHEET METAL

SHEET METAL

Shen Gong’s high-precision shear slitting knives (coil slitting knives) have been exported to Germany and Japan for an extended period. They are widely used in the coil processing industry, particularly in the slitting of silicon steel sheets for motor manufacturing and non-ferrous metal foils.

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Global Supply & Standards

Local Support, Custom OEM Services, and ISO Compliance

We recognize that modern recycling and processing lines operate 24/7/365. To minimize unscheduled stops, Sichuan Shen Gong provides specialized technical support, failure analysis, and customizable blade designs. We collaborate with equipment builders (OEMs) and processing plants globally to produce drop-in replacement blades that meet or exceed original specifications.

Every batch of our blades undergoes rigorous ultrasonic testing and coordinate measuring machine (CMM) inspection. This ensures that every dimension, edge profile, and counterbore fits the rotor assembly perfectly, eliminating structural failure risks during high-RPM crushing cycles.

Engineering & Development

Future Technological Roadmap & R&D Commitments

Our R&D team continues to pioneer advanced WC-Co grade compositions with specialized microstructures. By optimizing carbide grain sizes (down to sub-micron levels) and binder concentrations, we develop blades that balance extreme hardness with impact resistance.

Our technology roadmap includes developing thin-film diamond coatings (CVD/PVD) for next-generation composite and battery foil shredding. We also focus on expanding our Carbide Blade Recycling Program, helping global manufacturing plants reduce their carbon footprint and reclaim raw materials.

Technical FAQ

Plastic Crusher & Shredder Blades

Answering the most common technical questions from plastic recycling plant managers and engineers.

1. What materials are best suited for high-impact plastic crushing?
For heavy-duty high-impact shredding, shock-resisting tool steels like D2, H13, or S7 are commonly selected because they resist chipping and cracking from metallic contamination. For high-wear applications with minimal metal contamination (like clean film or fiber scrap), tungsten carbide provides significantly longer edge retention.
2. How do Shen Gong blades handle abrasive filler materials like glass fibers?
We use specific carbide grades with optimized binder ratios to resist the abrasive wear caused by glass fibers and mineral fillers. Our carbide-tipped options provide both the impact resistance of tool steel and the wear resistance of tungsten carbide.
3. What is the average lead time for custom OEM crusher blades?
Typical custom production times range from 4 to 6 weeks, which includes toolpath programming, powder pressing, sintering, heat-treating, precision grinding, and quality inspection. We also stock standard blanks to expedite urgent replacements.
4. How can we prevent polymer melting on the blade edge during operation?
Polymer melting is usually caused by excessive friction and dull edges. Maintaining a sharp cutting profile and proper clearance angles minimizes heat buildup. We can also apply low-friction PVD coatings or recommend cermet materials with a low affinity for polymers to reduce sticking.
5. Does Sichuan Shen Gong support drawing or sample-based customization?
Yes, our engineering department can work from your 2D/3D CAD drawings or reverse-engineer a physical sample. We ensure precise dimensional tolerances and metallurgical compatibility with your equipment.
6. How does blade quality affect overall energy consumption in a recycling plant?
Dull blades increase cutting resistance, which raises motor load and energy consumption. Keeping blades sharp with high-quality carbide materials maintains optimal cutting efficiency and lowers operating costs.
Updates & Press Releases

Press & News

Stay informed on the latest developments, market insights, and innovations in industrial cutting technology.

New Year Holiday Notice
Feb, 12 2026

New Year Holiday Notice & Our Best Wishes

As the New Year approaches, we thank our valued partners and customers for their trust. Please note that our facility will be closed for holiday from Feb 14 to Feb 22...

SG CARBIDE
Feb, 02 2026

Standing Shoulder to Shoulder: Facing Market Changes

The global manufacturing recovery and growing demand in emerging sectors are driving changes in the supply and demand of key raw materials like tungsten carbide...

European Packaging Plant Case Study
Jan, 03 2026

European Packaging Plant Achieves 20% Longer Tool Life

A European packaging plant using high-speed slitting machinery for multi-layer corrugated cardboard saw a 20% increase in tool life after switching to Shen Gong blades...