Injection Molding EM Heating Retrofit Case: 45% Energy Saving, 18-Month Payback

A plastic products factory with 10 injection molding machines originally used resistance heating bands with annual electricity costs of about 620,000 RMB. After retrofitting to electromagnetic induction heating, annual electricity costs dropped to 340,000 RMB, saving 45%.

Retrofit solution:

• Each injection molding machine equipped with a 60KW electromagnetic heating controller
• Customized induction coils based on barrel dimensions
• Temperature sensors and PID temperature control system installed
• RS-485 communication interface configured for factory automation integration

Retrofit results:

• Annual electricity savings: 280,000 RMB
• Investment payback period: 18 months
• Heating time reduced by 60%
• Improved temperature uniformity, reduced product defect rate