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Position sensors in plastic manufacturing

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As you probably know, linear position sensors, also known as linear transducers or potentiometers, measure the displacement of an object along a single axis, converting this movement into an electrical signal. This data is crucial for automated process control, enabling precise monitoring of key variables like position, pressure, or flow during manufacturing. In the plastics industry, these sensors are vital for ensuring high-precision molding processes.

Applications in plastics manufacturing

Linear position sensors or transducers are integral to injection molding and blow molding processes, where precise control over machine components is essential.

Injection molding: high-speed precision

Injection molding requires precise monitoring of key components like the injection unit, mold, and nozzle. Linear position sensors offer real-time feedback, optimizing the injection cycle for consistent product quality and minimizing waste. Magnetoresistive sensors, including rodless and spring-loaded types, excel in high-temperature and high-vibration environments, providing non-contact operation and exceptional durability.

Blow molding: precision for complex shapes

In blow molding, linear sensors ensure accurate mold positioning and control air pin movement, maintaining strict dimensional tolerances. These sensors deliver precision as fine as 0.005 millimeters, critical for producing uniform blown films. Their robust durability and long operational life ensure reliable performance even in challenging environments.

Types of linear position sensors

Various types of linear transducers offer unique benefits in plastic molding:

  • Rodless sensors: compact and cost-effective, ideal for space-limited applications like material handling and packaging systems.
  • LVDT sensors: non-contact, highly accurate, and resilient in extreme conditions, perfect for frictionless operation.
  • Spring-loaded sensors: contact sensors suitable for continuous motion tracking in hydraulic systems.
  • Fixed slide sensors: mounted in a fixed position, providing accurate feedback in high-speed assembly and automated production lines.

Conclusion

Linear position sensors deliver precise positioning, enhancing product quality with tight tolerances. These non-contact sensors minimize wear and extend the lifespan of equipment. Built to endure harsh conditions such as high temperatures and vibrations, they are ideal for plastic molding applications.

Discover how our linear position sensors can improve efficiency and reliability in your operations. Reach out to our team to explore tailored solutions that drive long-term success in industries like plastics manufacturing.


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Please feel free to contact us for questions and more information.

Robert van der Elst

Sales Engineer