Sawing Plastic: Avoid Damage to the Material

Sawing Plastic: Avoid Damage to the Material

Sawing plastic might seem easy, but the wrong technique can ruin the material. So, how do you get a good result? We're sharing our experience with sawing plastic.

Blade Choice is Key

When you choose a saw blade, it's crucial to consider both the tooth pitch and the material. The tooth pitch, meaning the distance between the teeth, should be adjusted to the plastic's properties. For a soft material like HDPE (also called PEHD or PE-300), a blade with a larger tooth pitch works well. This prevents the material from getting stuck. For harder plastics, for example PA6, a blade with a finer tooth pitch is a better choice.

The blade's material is also important. Invest in a blade made of tool steel for good durability. Coatings, such as diamond coating, can also improve performance and lifespan.

Feed Rate: Balance is the Key

The feed rate, that is, how quickly you feed the plastic through the blade, plays a big role. Too high a speed can lead to melting or cracks. Too low a speed can overheat the blade and cause unnecessary wear. How do you find the right feed rate? Experiment! Or use a guide that provides recommendations based on material and blade.

Cooling Prevents Problems

Cooling is important to avoid melting and cracking. Water, air, or special coolants can be used. The choice depends on the type of plastic and the saw blade. For HDPE, water may be sufficient. For PA6, air may be a better option. Proper cooling provides a safe and efficient result.

Common Mistakes and How to Avoid Them

Melting and cracking are common problems. Melting is often due to too high a feed rate or a too hot blade. Cracks can occur at too low a speed or with a worn blade.

Preventive measures? Choose the right feed rate, use appropriate cooling, and invest in a quality blade.

Materials Require Different Methods

Different plastics require different methods. HDPE benefits from a blade with a large tooth pitch and adjusted feed rate. PA6 needs a blade with a finer tooth pitch and likewise adjusted speed. PMMA (acrylic plastic) can benefit from a diamond-coated blade and cooling with air or coolant.

We're happy to help you with tips and advice! Contact us if you want to discuss material selection and sawing techniques for your specific application.