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Engel Formenbau und Spritzguss GmbH (ENGEL) specialises in manufacturing components for cars and household appliances.
With decades of experience in manufacturing, they are considered an early adopter of PLASTINUM™ GIM process and technology innovation.
ENGEL wanted to increase the quality of their injection moulded parts without increasing costs.
Their aim was to shorten cycle times and reduce the effects of clogging, resulting from oxidised residues.
ENGEL contacted The Linde Group and together they began to explore the possibility of nitrogen flushing as a process to cool the inner wall of the gas channel (within the plastic part) more effectively.
Linde installed a liquid nitrogen vessel, connected to their patented PRESUS N10 booster pump and a high-pressure evaporator.
Two gas injection moulding pressure control units were also installed ensuring consistent 340 bar pressure through the capillary tubes, connected to ENGEL’s two injection moulding machines. The Linde system was easily installed and instantly accelerated cycle times by 30%.
ENGEL and Linde decided to continue collaborations to develop and test an inerting solution for the gas cavity. The idea was to further increase productivity by reducing downtime and scrap rates. Inerting prevents the build-up of oxidised residues, which clog the gas injectors and supply system, resulting in costly cleaning processes and downtime. The inerting process introduced, successfully increased output by a further 10%.
Intent on achieving even further efficiencies, the nitrogen gas was replaced with carbon dioxide (CO2) for the inner wall cooling. At high pressures, CO2 is far denser than nitrogen, further enhancing the cooling power and further accelerating cycle times.
BOC, a member of The Linde Group, is proud to offer customised packages for GIM cooling.
BOC is able to collaborate with customers to perform on-site equipment trials, connecting to customer injection moulding machines.
In addition to GIM, BOC are also able to provide equipment for CO2 spot cooling, providing additional injection moulding cooling to areas where water cooling is unable to access.
“Linde is the perfect fit for our application technology needs. The PLASTINUM GIM package of technologies from Linde synergises our complementary expertise and innovative capabilities. The resulting increase in quality, productivity and efficiency means we are even better equipped to meet our customers’ expectations”.
Benefits of GIM at a glance
- Higher productivity with up to 30% reduction in cycle times
- Lowers costs with less downtime for cleaning
- Reduced scrap rates
- Improved quality
- Greater energy efficiency.