Investigation of the Large-Scale Pallet by Recycled Polypropylene and the Sequential Valve Gate System during the Injection Molding

Figure 13

Flatness of the pallet. (a) The flatness of the top plane of the pallet (cooling time 48 sec, mold temperature 40° Celsius, cooling channel 20° Celsus) (flatness 12.433 mm). (b) The flatness of the bottom plane of the pallet (cooling time 48 sec, mold temperature 40° Celsius, cooling channel 20° Celsius) (flatness 14.777 mm). (c) Flatness with respect to cooling time under mold temperature 40° Celsius, cooling channel 60° Celsius.

(a)

(b)

(c)