Flat Heating Knife System — Redefining Precision in Plastic Sheet Bending
Introduction: From Welding to Bending — The Weissenberg Philosophy of Quality
At Weissenberg, innovation extends beyond welding technology.
As China’s leading manufacturer of plastic sheet butt fusion machines, Weissenberg is dedicated to providing high-performance solutions for global clients — from HDPE and PP to PVC materials, covering welding, bending, and forming processes.
Now, our latest Flat Heating Knife System represents another breakthrough in bending precision and surface quality, setting a new benchmark for professional plastic sheet fabrication.
Advantages of the Flat Heating Knife System for PP / HDPE Sheet Bending
Traditional bending systems often cause excessive melt zones, surface unevenness, or weld bead formation, which compromise both the visual appearance and structural strength of the final product.
The Weissenberg Flat Heating Knife System completely changes this — enabling cleaner, smoother, and more professional bends.
Key Advantages:
✅ No visible melt zones during bending
✅ No bead formation or edge deformation
✅ Smooth and clean sheet surfaces
Every bend meets dual expectations of visual quality and structural performance, making it ideal for plastic fabrication, tank manufacturing, and display sheet forming.
How Weissenberg Achieves Seamless, Melt-Free Bending
True innovation isn't always about speed — it's about control and precision.
The Flat Heating Knife System embodies this principle: by ensuring uniform heat distribution and stable temperature control, Weissenberg’s design enables consistent bending across any angle — 55°, 35°, or custom configurations — while maintaining stable thermoplastic performance.
It's important to note:
For the fixed-angle, high-volume bending (such as 90° or 60°), the V-knife system provides higher geometric precision,
whereas the Flat Heating Knife System offers greater flexibility, surface smoothness, and melt-free quality.
Summary:
V-knife: More precise fixed angles, ideal for standardized mass production.
Flat heating knife: Adjustable angles, smoother surfaces, and cleaner visual results.
This “precision + controllability” philosophy perfectly represents Weissenberg’s decades of research and innovation in plastic sheet bending and welding technology.
Weissenberg — China’s Expert Manufacturer of Plastic Welding and Bending Equipment
From sheet butt fusion welders to extrusion welders and automatic bending machines, Weissenberg has become a trusted brand among professionals worldwide.
Our equipment is CE-certified and DVS-compliant, serving clients across Europe, Australia, and Latin America, and demonstrating the high-quality image of Chinese manufacturing in the field of plastic welding technology.
Typical Applications of the Flat Heating Knife System
•PP / HDPE / PVC sheet processing and forming
•Plastic tank, duct, and structural part fabrication
•Industrial display panels and advertising boards
•HDPE boat interiors and equipment panels
Whether for industrial production or custom fabrication, the Weissenberg Flat Heating Knife System delivers higher-quality bends and consistent results.
Frequently Asked Questions (FAQ)
1. What makes the flat heating knife different from traditional wire heating methods?
The Weissenberg Flat Heating Knife uses uniform surface heating technology, providing stable thermal distribution that eliminates the melt zones and uneven surfaces common with wire heating.
The result is a cleaner, bead-free, smoother bending surface.
2. Which system is more precise — the Flat Heating Knife or the V-Knife?
In fixed-angle mass production (e.g., 90° or 60° bends), the V-knife offers higher geometric accuracy because the angle is determined by mechanical geometry, ensuring perfect repeatability.
The Flat Heating Knife, on the other hand, allows adjustable bending angles through heat and time control — ideal for custom work and surface-critical projects.
3. What materials can the Weissenberg Flat Heating Knife System bend?
It is suitable for a wide range of thermoplastic sheets, including:
PP (Polypropylene)
HDPE (High-Density Polyethylene)
PVC (Polyvinyl Chloride)
PE, PVDF, and other industrial plastics
4. What is the adjustable bending angle range?
The system supports a 30°–90° adjustable range.
Common angles such as 35°, 55°, and 90° can be precisely controlled by adjusting the heating width and duration, ensuring ideal bending results.
5. Does Weissenberg support both Flat and V-Knife options?
Yes. Weissenberg offers both Flat Heating Knife and V-Knife bending solutions.
Whether you need a smooth-surface, angle-adjustable flat knife or a high-precision, fixed-angle V-knife for repetitive production, Weissenberg can provide the right configuration and technical support for your operation.
6. Can Weissenberg provide customized solutions?
Absolutely. Weissenberg offers custom-made heating lengths, temperature control systems, and angle configurations based on material thickness, type, and application.
Our engineers design optimized solutions to achieve the best balance between bending precision, production efficiency, and cost control.
About Weissenberg
Weissenberg Machinery specializes in the research, development, and manufacturing of plastic sheet welding, cutting, and bending equipment.
With decades of technical expertise and international experience, our products are widely used by plastic tank manufacturers, HDPE boat builders, and pipeline contractors around the world — continuously setting the standard for precision and quality in thermoplastic welding technology.
