---
title: Cracked Knives
description: Used plastics typically contain contaminants such as stones or metal parts, which lead to...
image: https://www.tkmgroup.com/hubfs/%5Bv20%5D/Blog/Kunstsoffrecycling.png
---

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Recycling industry

# Cracked Knives

![](https://www.tkmgroup.com/hubfs/%5Bv20%5D/Blog/Kunstsoffrecycling.png)

 27.08.2020 [ TKM ](https://www.tkmgroup.com/en/troubleshooting/author/tkm)

## Cracked Knives

- If production waste is directly recycled and returned into the production process, no problems will occur.
- Example: Producers of film, hollow bodies, injection moulding handler
- Used plastics typically contain contaminants such as stones or metal parts, which lead to immediate problems with the knives.
- In the worst-case scenario, the whole knife set could be damaged. This normally happens if the machine is not stopped immediately after the knife cracks.
- There is no one-fits-all solution. In some cases, the situation was improved with adjustments that added to the static rigidity at the cutting edge (e.g. attachment of bevels).

### Relevant articles

- [
  
  
  
  ##### Durability disposable blade (plastic fiber)
  
  
  
  ](https://www.tkmgroup.com/en/troubleshooting/durability-disposable-blade-plastic-fiber)
- [
  
  
  
  ##### Blade Breakage
  
  
  
  ](https://www.tkmgroup.com/en/troubleshooting/blade-breakage-cable)
- [
  
  
  
  ##### Durability
  
  
  
  ](https://www.tkmgroup.com/en/troubleshooting/durability-automotive-industry)

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