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SANDWICH
PROCESS
MIHB & BILLION’s Innovation :
MIHB has developed and designed a complete process implementing 3K injection, Sandwich and overmolding Processes, as well as IML technologies, to showcase this process produced on a BILLION 300T. All-Electric twin-shot IMM from new generation SELECT².
Sandwich process allows for one part to have a skin material different from the core material. In order to keep a good surface finish of the part, quality material is used for the outer part. Recycled or bio-based resins are implemented for core material, benefiting circular economy. In this particular demonstration, the Recycled PP core material amounts to more than 90 % of the part.
Sandwich process steps
2 injection units bring both materials together: The skin material is first injected in the mould, covering the outer side of the part. The second material is injected in the middle of the part, and finally the mould is closed with a second injection of the first virgin material.
The third material, injected via BILLION Plug&Play injection unit, is a TPO (Thermoplastic Polyolefin) overmolded on the racket handle, bringing soft touch and easy grip properties.
Mastered by MIHB the In Mold Labelling technology completes the process. The advantages in production are numerous: No more adhesive label with risk of damage, long-lasting solution, high quality decoration integrated in the part and easy to change during production.
Designed by MIHB for this specific process a 100 % automated process with multi-function robot: in mold labelling, part transfer from one cavity to the other, and final part extraction made by robot. The whole racket is 100% recyclable and can be integrated into the core material. An optimal configuration of waste reduction and a finished part for each production cycle!
THIS PROJECT HAS BEEN MADE POSSIBLE THANKS TO THE PARTNERSHIP OF MIHB X BILLION AS WELL AS:
