VFFS Special Contour Notch Cutting Blade For Plastic Bag Corner Forming
Packaging: wooden case
Lead Time: 15 working days
Payment Term: T/T, L/C, Western Union
Custom Service: OEM contour, V-angle & mounting holes
Structure Feature: Stress-dispersed inner concave design
Cutting Performance: No fraying on multi-layer plastic film
Basic Product Specs
Many vertical bag-making machines face early blade breakage during continuous film cutting.
Sharp corner cutting edges easily crack under repeated reciprocating impact. The overlapping position of the multi-layer composite film creates concentrated stress, leading to frequent downtime for cutter replacement.
This contour-notch blade features an inner concave stress-relief structure. We shift the stress concentration point away from the sharp corner, so the cutting edge avoids chipping after long-hour operation. The arc transition edge delivers neat cuts without pulling or fraying PE and composite packaging film.
We strictly copy the entire V-shaped outline, thickness, and mounting hole from your blade sample or technical drawing.
Big Brother Cutting Tool supplies all kinds of special contour cutters for VFFS packaging equipment.
View more packaging machine spare blades here: Packaging Blades
Structure Design & Technical Advantages
Stress-dispersed Inner Concave Structure
Traditional V-shaped cutters crack easily at the sharp corners. We add inner concave segments to transfer peak stress to stable positions, extending blade service life by more than 30%.
Arc Transition Cutting Edge
The V-angle connects smoothly with the straight edge, so the multi-layer film will not be torn during high-speed bag forming. Finely ground edge eliminates burrs on plastic packaging.
Quick-change Fixed Structure
We reserve standard clamping notches and mounting holes. The blade can be locked tightly with spring clips, avoiding deformation caused by loose installation during continuous cutting.
Structural & Craft Features
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Inclined straight single-sided cutting edge
The blade adopts a precise inclined edge design. It forms scissor-type cross cutting with upper moving blade, realizing stable and efficient trimming for plastic film and textile materials.
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Single round mounting hole structure
One precise countersunk circular hole locks the blade firmly on the knife holder via positioning bolt, avoiding displacement under high-frequency vibration and fast reciprocating cutting.
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Compact contoured L-shaped base
L-type curved corner base strengthens the overall rigidity of the blade body, and it can be perfectly embedded into narrow mechanical arms of various packaging and sewing machines.
Matching Equipment & Processing Materials
Applicable Machines
Vertical form fill seal (VFFS) automatic packaging machine
Bag-making station for food, daily chemical, and snack packaging production line
Cutting Materials
PE single-layer film, multi-layer composite film, and laminated plastic packaging bag raw material.
Core Product Merits
- The stress relief structure effectively prevents corner chipping and early fracture.
- Arc ground edge keeps a clean cut without film fraying, reducing defective bag rate.
- Custom V-angle, contour, and hole layout, direct replacement without modifying the machine.
- Solid alloy steel blank improves rigidity for long-shift high-speed production.
- Small trial orders are accepted for new bag-making line testing.
Installation & Daily Maintenance
- Cut off the machine power and lock the safety switch before replacing the notch cutter.
- Take out the old blade and clear plastic film residue on the cutter holder.
- Align the new blade and fasten the clamping spring evenly to avoid shaking during reciprocating movement.
- Run an empty test for 10 cycles, then start continuous bag corner cutting.
- Clean residual plastic scraps on the V-edge every 6 hours to reduce edge abrasion.
- Keep spare blades sealed in dry anti-rust packaging.
Detail display
High Quality Materials
Smooth Blade Without Burrs
Sharp Edges
FAQ
Q: Which packaging machine fits this notch blade?
A: It works for most vertical VFFS bag-making machines. We replicate the full contour strictly based on your original blade sample.
Q: How does the stress relief structure improve durability?
A: Inner concave segments move stress away from the sharp V-corner, avoiding crack initiation at the cutting tip, so the blade lasts 30% longer than ordinary V-shaped cutters.
Q: Can you customize the V-angle and outer shape?
A: We fully customize the notch angle, overall outline and mounting hole position according to your drawing or physical sample.
Q: Will this blade leave burrs on composite film?
A: Multi-step fine grinding ensures smooth cutting edge, multi-layer plastic film will not be stretched or frayed during high-speed bag forming.
Inquiry Guidance
If you need bulk factory price, test samples, or custom contour notch cutters for your vertical packaging machine, send clear photos and dimension data of your old blade.
Big Brother Cutting Tool manufactures a full range of special contour cutters, heat-seal knives, and film slitting blades for VFFS packaging production lines. We reply to all buyer inquiries within 12 working hours.
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