Carbide PCB Film Cutting Blade

Carbide PCB Film Cutting Blade is a circular film slitting tool specially used in the dry film process of PCB fabrication. It adopts solid cemented carbide sintered substrate, and the outer cutting edge is processed by high-precision mirror polishing. Mounted on dry film slitting machine, it continuously rotary-slits rolled photoresist dry film, cutting wide dry film into target width for production. It ensures intact edge of dry film without damaging the photoresist coating, meeting the slitting requirement before inner /outer layer lamination of PCB, and also compatible with various thin flexible films.

Product Definition

Tungsten carbide film cutting knife (dry film slitting blade): Solid cemented carbide circular rotary slitting blade, with central mounting positioning hole and precision cutting edge on outer rim. Driven by equipment to rotate, cooperating with elastic rubber pad, it continuously slits thin coil materials by rotary shearing. It is special consumable for PCB dry film slitting process.

Material Analysis

Substrate: Cemented carbide (tungsten carbide), integrally sintered, no welded structure.

High tungsten content provides extremely high hardness and wear resistance, the edge is not easy to passivate after long-term film

cutting;

Optimized cobalt content balances toughness and reduces chipping risk under normal rotary slitting condition;

High material density and uniform metallographic structure. The cutting edge can be polished to ultra-high finish, reducing film sticking and wire drawing. Note: Cemented carbide is relatively brittle. Impact or hard extrusion will cause chipping and invisible microcracks. Avoid collision during handling and storage.

Performance Test Results

1.Edge finish: Mirror polished, no burr or chipping on cutting edge, enabling dry film cutting without wire drawing;
2.End face runout test: Blade end face runout ≤0.003mm, stable cutting and consistent cutting edge;
3.Wear life test: Under standard working condition with clean photoresist dry film, edge wear per unit cutting length ≤0.002mm;
4.Chipping resistance test: Continuous rotary cutting under standard cutting pressure without chipping or tooth loss. Edge damage will occur under foreign object impact (inherent property of tungsten carbide).

Core Advantages

1.Solid one-piece tungsten carbide forming: No welding layer, no risk of welding detachment, stable strength;
2.Precision mirror grinding on cutting edge: Neat dry film cutting edge, no wire drawing, no pulling of photoresist layer, reducing dry film scrap;
3.High wear resistance: Service life several times longer than ordinary steel blades, less downtime for tool change;
4.High dimensional accuracy: Strict tolerance control on outer diameter, thickness and inner hole, small runout on machine, stable slitting width;
5.Strong adaptability: Customizable outer diameter, thickness and inner hole, compatible with all brands of PCB dry film slitting equipment;
6.Low blade sticking property: High-density and smooth surface reduces residual dry film glue adhesion and lowers cleaning frequency.

Specification

Table Specifications: Φ64×Inner hole12×Thickness0.8mm/0.85mm Φ65×Inner hole12×Thickness0.8mm/0.85mm

Item	Parameter	Remark
Product Name	Carbide PCB Film Cutting Blade	Dry film slitting blade
Standard Outer Diameter	64mm	Non-standard customization available
Standard Inner Hole	12mm	Mounting positioning hole, customizable
Standard Thickness	0.8mm	Thickness adjustable on request
Material	Solid cemented carbide (Tungsten Carbide)	Integrally sintered, no welding
Edge Process	Precision mirror polished cutting edge	Single / double edge optional
Processing Method	Rotary slitting (rotary cutting)	Used with dry film slitting machine

Application Scope

PCB Industry: Slitting of photoresist dry film for PCB inner and outer layers (core application)

Film Industry: Rotary slitting of PET protective film, thin adhesive film and various flexible thin coils

Compatible Equipment: PCB dry film slitting machine, film rotary slitter Applicable Material: Flexible film coil with thickness ≤0.2mm

Quality Inspection Standard

1.Visual Inspection: No chipping, notch, crack or scratch on cutting edge; no oxidation or collision damage on blade surface;
2.Dimensional Inspection: Outer diameter, thickness and inner hole sampled by micrometer / inside caliper, tolerance conforms to drawing requirement;
3.Runout Inspection: End face runout tested by dial indicator, ≤0.003mm;
4.Cutting Trial Inspection: Sampling test cutting on dry film for each batch, qualified if no wire drawing or burr on cutting edge;
5.Packaging Inspection: Individual foam protective box packaging to prevent collision during transportation.

Sample Trial Procedure

1.Demand Confirmation: Confirm equipment model, blade OD / ID / thickness, edge requirement and cutting material;
2.Quotation for Sample: Provide sample specification, lead time and sample cost description;
3.Sample Production: Precision machining and grinding according to drawing, delivered after full qualified inspection;
4.Sample Delivery: Independent protective packaging with product parameter card;
5.Customer On-machine Test: Customer on-site trial cutting, record cutting effect, service life and burr condition;
6.Sample Feedback: Collect customer test data, evaluate whether to adjust edge or dimension;
7.Sample Closing: Mass order if test passes; optimize process and re-sample if unqualified.

After-sales Support

1.Full inspection before shipment. Free remaking or replacement for defective dimension / edge caused by manufacturing;
2.For naturally passivated cutting edge under normal use, factory regrinding service is available with reasonable grinding charge;
3.Technical Support: Provide technical guidance for installation, gap adjustment and troubleshooting;
4.Disclaimer: Blade chipping & damage caused by collision, wrong installation, foreign object involvement or over-load working condition is not covered by free warranty. Tungsten carbide is consumable, normal wear is not covered by warranty.

FAQ

Q1: Can this Carbide PCB Film Cutting Blade cut copper foil?

A1: Not recommended. Copper foil easily sticks to blade, copper scraps will rapidly wear cutting edge, greatly shorten tool life and easily generate burrs.

Q2: The blade has slight collision, no visible notch, can it still be used on machine?

A2: Not recommended. Tungsten carbide is highly brittle. Collision will produce invisible internal microcracks, which may cause chipping at high rotating speed and bring safety risk.

Q3: Wire drawing and burrs appear when cutting dry film, must the blade be damaged?

A3: Not necessarily. Prioritize checking: aging rubber pad, spindle runout, cutting pressure and guide roller parallelism. Check blade edge wear only after confirming equipment works normally.

Q4: Can I grind the cutting edge by myself?

A4: Not recommended. Tungsten carbide grinding requires special diamond grinding wheel and fixture. Self-grinding will destroy edge precision and cause excessive runout. You can send it back to factory for regrinding.

Q5: What should be noticed for blade storage?

A5: Store separately in foam protective box with edge isolated, do not stack. Keep storage environment dry and avoid moisture.