On a lithium battery slitting line, the knife is one of the smallest parts in the machine and one of the least forgiving. A coated electrode web passes through it at speed, and whatever the edge leaves behind — a burr, a chipped corner, a trace of foil smeared on the blade — travels on into winding, stacking and, eventually, the finished cell. For battery makers, the question is rarely whether a knife can cut. It is whether it can keep cutting the same way, shift after shift.
That is the problem Huaxin Carbide set out to address with its newly launched line of customized tungsten carbide circular slitting knives for new energy applications. The range is built for slitting battery electrode sheets, metal foils, separator film and adhesive tape, and every parameter can be tailored to the customer’s own equipment and material.
Two representative sizes show the kind of work the knives are made for: a 150 × 15 × 0.7 mm full mirror-polished circular knife and an 80 × 30 × 0.3 mm version for thinner, finer cutting tasks. Both follow the same idea — a carbide body, a mirror-finished edge and dimensions held tightly enough that the blade runs true.
| Representative Specifications | ||
| Size (OD × Bore × Thickness) | Surface | Typical Use |
| 150 × 15 × 0.7 mm | Full mirror polish | Electrode, foil and film slitting |
| 80 × 30 × 0.3 mm | Full mirror polish | Thin, high-precision slitting |
| Other sizes | Per customer requirement | Custom to drawing |
Why carbide, and why a mirror finish? Battery materials are unusually hard on cutting edges. Coated electrodes are abrasive, copper and aluminum foils are thin and soft enough to drag or stick, and separator film is easily damaged by a rough edge. A tungsten carbide body gives the blade the hardness and wear resistance to hold its geometry over long runs, while the full mirror-polished edge is designed to cut cleanly and cut down on the burrs, chipping and material adhesion that show up when a surface is rough.
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Hard and wear-resistant
Tungsten carbide substrate keeps the edge stable through long production runs.
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Full mirror-polished edge
A smooth, sharp and even edge for clean separation of thin materials.
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High dimensional accuracy
Tight control of size and edge for stable, consistent cutting performance.
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Less burr, chipping and sticking
Designed to reduce edge defects and foil adhesion that hurt yield.
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The knives cover a wide stretch of the new energy production chain: positive and negative electrode sheet slitting, copper and aluminum foil, battery separator, functional film and adhesive tape. They also suit other high-precision converting jobs where a clean edge matters as much as the cut itself.
In practice that means Huaxin Carbide does not treat the knife as a fixed catalog item. Outer diameter, bore, thickness, carbide grade, edge geometry and surface treatment can all be specified to match the customer’s slitter and the material running through it.
| How a custom order works | |
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Send your drawing or specification. Dimensions, tolerances and the material being cut are the starting point. |
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2
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Confirm grade, edge and finish. Carbide grade, edge geometry and surface treatment are matched to your application. |
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3
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Receive a quotation. Pricing is based on your confirmed specifications. |
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Production and delivery. Knives are made to the agreed drawing. |
The launch fits Huaxin Carbide’s wider focus on tungsten carbide industrial knives and non-standard cutting parts, and extends the company’s slitting experience into one of the fastest-moving manufacturing sectors.
What sizes are available?
Representative sizes include 150 × 15 × 0.7 mm and 80 × 30 × 0.3 mm (outer diameter × bore × thickness), both with a full mirror finish. Other dimensions can be made to your drawing.
Which materials can the knives slit?
Lithium battery positive and negative electrode sheets, copper and aluminum foil, battery separator, functional film and adhesive tape, as well as other precision converting materials.
What should I send to get a quote?
A drawing is ideal. If you do not have one, send the outer diameter, bore, thickness, the material you are cutting, your slitter model and the quantity you need.
Website: www.huaxincarbide.com
HUAXIN CARBIDE · Tungsten Carbide Industrial Knives & Customized Cutting Solutions
Post time: Nov-10-2026
