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A new co-injection process developed by Engel in cooperation with Top Grade Mould enables the use of high levels of fully encapsulated recycled material in the production of barrels, thus outperforming traditional sandwich injection molding processes
.
5 gallon drums are commonly used in North America for industrial, consumer and food products
Globally, there is growing political pressure to use recycled plastic materials
.
These trends drive the development of new co-injection processes
.
extremely short cycle times
extremely short cycle timesEngel's development partner was Top Grade Mould from Mississauga, Canada, a mold maker specializing in packaging applications
.
This new type of large machine combines the triple advantages of productivity, efficiency and short cycle times
.
Co-injection can concentrate recycled material on the inside of a part and encapsulate it in a skin layer of virgin material
.
For demonstration purposes, the product uses a virgin transparent surface material and black recyclable material
.
ENGEL's compact two-platen machine technology brings outstanding efficiency and other benefits
.
higher product quality
higher product qualityThe biggest challenge in sandwich injection molding is achieving high recycled content without compromising product quality or performance
.
Therefore, one focus of the development was to combine the two molten plastics in the barrel mold, rather than mixing them beforehand while they were molten
.
Thus, the system switches between recycled and virgin material via a co-injection valve at the injection point of the cavity
.
5 gallon drums are commonly used in North American markets for various purposes
.
Since the core material and the skin material are strictly separated during the production process, and the core material is wrapped by the skin material, including the injection point, the new co-injection process in the food industry can also be considered
.
In the presentation on the new co-injection process, Engel has further strengthened its expertise in the production of sandwich products with cores made from recycled materials
.
Different from the skinmelt process shown by Engel at the 2019 K exhibition, which is mainly used to produce technical parts such as logistics boxes and pallets, the co-injection process jointly developed with Top Grade Mould mentioned this time is mainly used to meet the needs of barrels and other small packaging products.
The manufacturer's requirements are also applicable to multi-cavity molds
.
Enhancing the use of recycled materials is one of the necessary prerequisites for building a circular economy for plastics, and Engel and its partners are making a big push towards this goal
.
