R&D News: Automotive

The Uniloy Milacron blow molding machines can be equipped with RPV, a device that permits to decentralize the extrusion die compared to the pin, according to a dynamic profile that can be programmed at will with the objective to create major thickness on one side of the parison. The system does not modify the total passage area of the resin but it simply moves the die asymmetrically.

RPV is particularly useful for pieces with strong dissymmetry, corresponding to different stretch ratio during the blow molding phase that varies along the longitudinal axis of the piece.

The decentralization process occurs dynamically during the parison extrusion, according to fixed parameters of each produced piece by means of two hydraulic cylinders connected to the die, but can be used for various products by reprogramming the desired profile. There are many pieces with very complex shapes that can benefit by this possibility to control the thickness. The device is particularly useful for 3-D ducts produced with parison suction.

If the necessity of the customer is to blow mold containers with high quality finish surface, for functional or market reasons (obtainable with costly...

Stable production processes, with parameters that are maintained within the fixed limits, generate a constant quality product...

UMA.SH, “S” as in Suction and “H” as in High Temperature, is suitable to blow mold polyamide PA ducts near the motor, that are characterized...