Carbide PCB Dry Film Circular Cutter

As a China Manufacturer, Winway offers the Carbide PCB Dry Film Circular Cutter, a special disc blade for dry film processing in PCB circuit board production. It is integrally sintered with cemented alloy, and the cutting edge is precisely ground. It is used to slit and cut roll-type photosensitive dry film according to process requirements, ensuring no burrs and small tensile deformation on dry film cutting edges. It matches the slitting and cutting process before dry film lamination, and it is the core consumable for inner and outer layer dry film manufacturing of PCB.

Product Definition

Carbide PCB Dry Film Circular Cutter, also known as a dry film cutting knife or disc dry film knife. It is an integrally formed disc blade of cemented alloy. The outer ring is a precision-ground cutting edge, and the center is equipped with a mounting positioning hole. Installed on a dry film slitting machine, it is used for roll slitting of PCB photosensitive dry film.

Working Principle

The blade rotates at high speed with the main shaft. Under certain pressure, the sharp alloy cutting edge contacts the dry film material and continuously cuts the dry film coil by shearing force of blade edge. Cooperating with bottom blade /rubber pad, it achieves clean rotary cutting, divides wide dry film into the width required for production, ensures neat cutting edge and avoids pulling the photosensitive layer of dry film.

Specification Table

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

Item	Parameter Example	Description
Product Name	Carbide PCB Dry Film Circular Cutter	Dry film cutting knife
Outer Diameter	64mm	Customizable
Inner Hole	12mm	Mounting positioning hole
Blade Thickness	0.8mm
Material	Cemented Alloy	Integrated forming, no welding
Cutting Edge Type	Single / double side precision ground edge	Optional as required
Application Method	Rotary cutting	Used on dry film slitting machine

Application Range

PCB industry: slitting and cutting of photosensitive dry film (photoresist dry film), cutting for inner and outer circuit dry film

Similar thin soft films: slitting of PET film, protective film and thin adhesive film (thin soft rolls)

Equipment: dry film slitting machine, film rotary cutting machine

Non-applicable Working Conditions

1.Cannot cut metal foil, copper foil, thick FR4 board and hard plates, which will cause edge chipping and rapid wear
2.Not suitable for cutting hard materials thicker than 0.2mm
3.Cannot be used for high-load continuous cutting of hard particles and high glass fiber content materials
4.Direct cutting on hard metal table without elastic bottom pad (rubber pad / bottom blade) is prohibited
5.Not suitable for intermittent impact cutting (punching), only for continuous rotary cutting

Common Selection Misconceptions

1.❌ Thicker means more durable: Blade thickness matches dry film thickness and equipment clearance. Too thick blade will wrinkle dry film
2.❌ The higher hardness the better: Excessively high hardness reduces toughness, and edge chipping occurs easily under slight impact
3.❌ Universal for all films: Cutting film with sand grains and dust will accelerate edge wear, separate evaluation is required
4.❌ Inner hole processing at will: Poor inner hole accuracy leads to large runout during operation and directly causes burrs on cutting edge
5.❌ Mix old and new blades: Inconsistent height of new and old blades results in uneven cutting depth of dry film

Operation Taboos

1.Direct hard contact between blade and metal bottom blade is forbidden. Machine startup without buffer rubber pad is prohibited
2.Forcibly increasing pressure for cutting is forbidden. Excessive pressure will cause edge damage and dry film wrinkling
3.Do not start the machine with loose clamping or excessive spindle runout, which will cause edge chipping
4.Foreign matters (copper scraps, dust, hard objects) entering between blade and rubber pad are forbidden
5.Prevent blade from dropping and collision. Alloy material is brittle, slight impact will produce invisible microcracks
6.Do not touch rotating blade by hand without shutdown

Fault Analysis

Fault Phenomenon	Cause Analysis
Burrs and drawing on dry film cutting edge	1. Blade edge worn or chipped; 2. Large spindle runout; 3. Insufficient pressure; 4. Aging and wear of rubber pad
Cutting position deviation of dry film	Blade installation eccentricity, unparallel equipment guide roller
Blade chipping and notch	1. Collision; 2. Excessive pressure; 3. Hard foreign matter involved; 4. Microcracks on blade
Dry film wrinkling after cutting	Overlarge blade thickness, excessive pressure, hard rubber pad
Cannot cut off with residual filaments	Blade edge passivation, insufficient pressure, excessive blade gap

Maintenance

1.Storage: Place blades separately in foam / protective box, isolate cutting edges, avoid stacking and collision with each other
2.Cleaning: After each shutdown, gently clean cutting edge with dust-free cloth and alcohol to remove residual dry film glue, do not scrape blade edge with hard objects
3.Inspection: Visually check whether there are chipping, notches and cracks on blade edge before operation; regularly test spindle runout
4.Edge repair: After edge passivation, send back to manufacturer for regrinding, self-grinding is not allowed
5.Assembly & disassembly: Handle gently, hold blade side, do not touch sharp cutting edge
6.Environment: Store in dry environment to avoid long-term damp oxidation

FAQ

Q1: How long can the Carbide PCB Dry Film Circular Cutter last?

A1: Service life depends on dry film cleanliness, cutting length, pressure and rubber pad condition. Longer service life under normal working condition with dust-free dry film; dust will greatly shorten blade life.

Q2: Must we replace the blade once slight burrs appear?

A2: First check whether rubber pad is aging, equipment pressure and runout. Replace the blade if blade edge is confirmed passivated.

Q3: The blade drops accidentally, can it still be used if no notch is seen?

A3: Alloy material is brittle. Falling easily causes invisible microcracks, which may lead to edge chipping during high-speed rotation. Continued use is not recommended.

Q4: Can it be used to cut copper foil?

A4: Not recommended. Copper foil sticks easily to blade, and copper scraps will quickly wear cutting edge and shorten tool life.