Cutting plastics without compromise: Here's how it's done correctly
Cutting plastics sounds simple, but in practice it requires precise technique, comprehensive material knowledge, and precisely coordinated processes. Only those who consider these factors will achieve clean, precise, and cost-effective cutting results – regardless of the material or part format.
Requirements for cutting plastics
In industries such as automotive, medical technology, technical textiles, or furniture production, plastic parts must be cut precisely. It is not enough just to separate the component. It must:
- maintain exact dimensions (even with complex geometries),
- be cut with repeat accuracy (same quality in continuous operation),
- have clean edges (to avoid contamination or chips),
- and require as little rework as possible (reducing manual steps).
The ability to cut different components on one machine is becoming increasingly important in modern production lines. Here, flexibility in technology and adaptability of the system are crucial.
Which technology is suitable for cutting plastics?
Depending on the material, part geometry, and production situation, different cutting methods are used. A precise selection is crucial to avoid damage to the material and to achieve the required cutting qualities.
Rotating knives
This technique is mainly used for continuously produced profiles from extrusion plants. The rotating blades cut the continuous material in sync, allowing high cutting frequencies with consistent quality. This method is particularly advantageous for soft to medium-hard thermoplastics like PVC or TPE.
Guillotine cutter
This is a linear cutting method where a blade hits the material vertically from above. It is suitable for sheet materials or prefabricated parts and is often used for small series or changing product formats. Typical materials are rigid thermoplastics or composites.
Thermal cutting
This method works with heat, such as through hot wire or hot knives. It is particularly suitable for synthetic textiles or fiber-reinforced materials, as it seals the edges while cutting. This prevents fraying or unravelling of cut surfaces.
Which method is the most sensible?
The choice of a specific method depends on several factors: the elasticity modulus of the plastic, the material thickness, the geometric shape of the part, and the sensitivity of the cutting edge. Production speed and the degree of automation also play a role in selecting the appropriate system.
Cutting plastics correctly: Avoid typical problems
Even small deviations in cutting parameters or material behavior have significant impacts on the quality of the final product. Therefore, it is important to understand the following influencing factors and to take them into account in the planning and operation of your cutting technology.
Material behavior during cutting
Thermoplastics like polypropylene (PP) or polyethylene (PE) tend to deform with too much friction or cutting speed. This leads to unclean, charred cut edges. Thermosets like epoxy resins are brittle and can crack or splinter under too much pressure. The choice of tool and process parameters must be precisely tailored to the specific material.
Chip formation and burr
Unclean cutting conditions lead to chips or burrs that disrupt downstream processes or even render products unusable. Depending on the application, burrs must be mechanically removed or sanded smooth. The goal is always a burr-free cut that requires no reworking, saving costs and time.
Maintaining tolerances
Especially in series production, exact dimensions are crucial. A part that deviates by even 0.2 mm can jam or be leaky during assembly. In the medical technology or automotive industry, tolerances are in the range of a few hundredths of a millimeter. Therefore, the cutting technology used must ensure high repeatability and stable process parameters.
Advantages of Modern Cutting Systems for Plastic Cutting
Those who want to cut plastic cleanly and economically benefit from technical solutions that go beyond mere separation. Modern cutting systems offer:
Reproducible Cutting Quality
- Consistently precise results with each cutting process
Less Waste
- Precise cuts reduce material losses
Increased Productivity
- Fast cycle times increase production throughput
Flexibility for Various Products
- Thanks to modular technology and variable cutting methods
Seamless Integration
- Compatible with existing production lines and control systems
Minimized Post-Processing Effort
- Burr-free edges reduce manual
Tips for Choosing the Right Cutting Technology
1. Check the Range of Materials
Do you process different plastics with various properties (soft/hard/elastic)? Then you need a system that can adapt flexibly.
2. Analyze the Production Volume
With high throughput, an automated system quickly pays off. In single-unit or small series production, a manual solution may be more economical.
3. Pay Attention to Post-Processing
Each burr means additional effort. A well-tuned system reduces manual intervention and thus saves time and resources.
Integration into Existing Systems
Is your production line already automated? Then the cutting system must be compatible – for example, through standardized interfaces, compatible controls, and common machine communication (e.g., PLC).
Plastic Cutting with Deckert Systems
Good plastic cutting starts with the right technology. Whether you need to process large quantities or react flexibly to changing products: Our cutting systems offer the right solution for efficient, clean, and reproducible cuts.
Modular Precision Cutter
The modular cutting system is designed for the processing of different plastics and product formats. With interchangeable cutting units, it can be flexibly adapted to new requirements. Its high cycle rate and line compatibility make it the optimal solution for automated series productions with changing product dimensions.
Compact Precision Cutter
The Compact Precision Cutter is a space-saving, economical cutting solution for simple applications. It is ideally suited for the precise cutting of smaller plastic parts with medium throughput. Thanks to quick setup and intuitive operation, it is particularly efficient in changing batches or in smaller production environments.
Our services for cutting plastics
The right cutting system is just one part of the solution. To ensure that your processes for cutting plastics run efficiently and reliably, we offer you comprehensive support – from the initial idea to the final implementation:
Feasibility analyses
We check in advance whether your component can be economically cut with our systems – tailored to material, shape, and tolerances.
Consulting & Design
We develop customized solutions that are precisely tailored to your requirements and production environment.
Maintenance & Repair
For consistently precise cuts, we provide quick service interventions, regular maintenance, and high spare part availability.
Custom Adaptations
Whether ATEX, cleanroom, or special material – we adapt our machines if standard solutions are not sufficient.
Your Contact Person
Do you have questions about our products or the application of our cutting systems? Our staff is happy to advise you.
Contact us now!
Whether series production, blanks, or complex geometries: We advise you on choosing the appropriate process and support you with suitable technology.