{"id":1059,"date":"2026-09-14T08:55:56","date_gmt":"2026-09-14T08:55:56","guid":{"rendered":"https:\/\/isbmmolding.com\/?p=1059"},"modified":"2026-09-14T08:55:56","modified_gmt":"2026-09-14T08:55:56","slug":"how-to-reduce-energy-consumption-in-isbm-production","status":"publish","type":"post","link":"https:\/\/isbmmolding.com\/id\/how-to-reduce-energy-consumption-in-isbm-production\/","title":{"rendered":"Bagaimana cara mengurangi konsumsi energi dalam produksi ISBM?"},"content":{"rendered":"
Energy cost is typically the second-largest variable operating cost in ISBM production after resin, and the largest single controllable cost beyond the initial machine purchase. For an ISBM machine running two shifts a day, 250 days a year, energy savings of 30\u201345% through drive system and process optimisation represent USD 8,000\u201325,000 in annual cost reduction depending on machine size and local electricity price. This guide covers every lever available to reduce energy consumption in one-step ISBM production, in order of impact.<\/p>\n
The most impactful energy reduction decision in ISBM is made at machine purchase: choosing a servo-hydraulic or full-servo (all-electric) drive system over a fixed-speed hydraulic pump. Fixed-speed hydraulic pumps run continuously at full motor speed regardless of whether the machine is actively clamping, injecting, or in a dwell period. Energy is consumed even when the hydraulic system is not performing useful work, because the pump pressure must be maintained. A servo-hydraulic system runs the pump motor on demand only, matching hydraulic flow precisely to the instantaneous requirement and consuming zero pump energy during dwell periods.<\/p>\n
The measured energy saving of servo-hydraulic over fixed-speed hydraulic on ISBM machines is consistently 30\u201345% in commercial production conditions \u2014 not a theoretical figure, but verified from installed machine consumption data. A full-servo (all-electric) machine, which replaces all hydraulic axes with servo-motor-driven mechanical systems, achieves 40\u201355% energy saving over fixed-speed hydraulic. All EP-HGY and EP-BPET machines use servo-hydraulic or full-servo drive as standard. If you are operating a fixed-speed hydraulic ISBM machine, retrofitting a servo-hydraulic pump system (where the machine\u2019s hydraulic circuit design allows) is the single highest-ROI energy investment available for that machine.<\/p>\n
The desiccant dryer for PET resin is typically the second-largest energy consumer in an ISBM production cell, after the machine itself. Standard desiccant dryers operate at 160\u2013170\u00a0\u00b0C and consume significant energy for both the heating element and the desiccant regeneration cycle. Several measures reduce dryer energy without compromising drying effectiveness:<\/p>\n
The conditioning station infrared heaters are significant energy consumers on 4-station and 6-station ISBM machines. Each heater zone runs continuously at its setpoint temperature during production, regardless of whether the conditioning step is limiting the cycle time or is completing well within the injection station\u2019s available time. Heater energy can be reduced by: setting the minimum number of active heater zones required to achieve the target preform temperature profile (zones not needed for a specific bottle format should be switched off, not just reduced); using pulse-width modulation (PWM) control where available to reduce heater energy during dwell periods within the conditioning step; and confirming that the target conditioning temperature is the minimum needed to achieve acceptable bottle quality rather than a conservative overshoot of the process window.<\/p>\n
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Servo-hydraulic drive on the EP-HGY series \u2014 on-demand pump operation is the single most impactful energy reduction measure available in ISBM production, saving 30\u201345% versus fixed-speed hydraulic.<\/p>\n
High-pressure blow air at 25\u201340 bar is generated by a dedicated booster compressor and represents a significant energy cost in the ISBM production cell. Several measures reduce blow air energy without compromising bottle quality:<\/p>\n
Reducing cycle time increases the number of bottles produced per hour for the same machine energy consumption, which reduces the energy cost per bottle even if total machine energy consumption stays constant. Cycle time reduction is achieved through: optimising cooling water flow and temperature in the injection mould (reducing cooling time within the injection cycle); optimising the blow mould cooling circuit for faster bottle cooling; and using the 6-station machine configuration (EP-HGYS280-V6), which allows shorter mould hold times by using a post-blow cooling station to complete bottle cooling off the blow mould.<\/p>\n
Energy cost per bottle is also affected by production scheduling decisions. Running the machine at continuous high output rates is more energy-efficient than frequent starts, stops, and idle periods. Machine startup from cold consumes significant energy in barrel heating, dryer cycling, and mould temperature conditioning. A production schedule that consolidates smaller runs into longer continuous runs, with planned format changes rather than unplanned interruptions, reduces the number of startups per week and the associated energy overhead. Where possible, schedule mould changeovers immediately after the end of one production run (while the machine is still at operating temperature) rather than after a cold shutdown, to avoid the energy cost of a second full warm-up cycle.<\/p>\n
Want to calculate the energy saving of upgrading to a servo-hydraulic ISBM machine?<\/p>\n
Ever-Power can calculate the expected annual energy saving for your specific production volume and local electricity price when upgrading from fixed-speed hydraulic to the EP-HGY servo-hydraulic range. Contact our technical team with your current machine\u2019s energy consumption data.<\/p>\n