Injection Moulds with Embedded Electronics

1. Introduction

Injection moulding is a widely used manufacturing process for producing complex plastic components in high volumes with excellent dimensional accuracy. Traditionally, injection moulds have been purely mechanical systems, designed to shape molten plastic and withstand high pressures and temperatures. However, with the advent of Industry 4.0, smart manufacturing, and embedded sensor technologies, moulds are evolving into intelligent tools capable of monitoring, controlling, and optimizing the moulding process in real time.

Injection moulds with embedded electronics integrate sensors, microcontrollers, and communication modules within the mould structure to collect process data and enable adaptive control. These “smart moulds” significantly improve product quality, reduce cycle time, and support predictive maintenance.

2. Concept and Working Principle

Embedded electronics are incorporated directly into the mould cavity, core, or other tooling components without affecting the mould’s structural integrity or moulding performance. These electronics can include:

• Temperature sensors (thermocouples, RTDs)

• Pressure sensors

• Humidity and flow sensors

• Strain gauges

• RFID chips for part tracking

• Microcontrollers or wireless transmitters

During each injection cycle, these sensors continuously measure parameters such as:

• Melt temperature and pressure inside the cavity

• Cooling channel temperature

• Clamp force and mould strain

• Cycle time and part ejection conditions

The collected data are transmitted to a data acquisition system or manufacturing execution system (MES) via wired or wireless communication (e.g., Bluetooth, Wi-Fi, or industrial protocols). Advanced analytics and control algorithms can then adjust process parameters (injection speed, packing pressure, cooling time) dynamically.

3. Components and Technologies Used