In-line systems

Process description:
An In-line system combines two normally separate value-adding processes into one single process. For example: combining compounding and injection moulding or compounding and extrusion.

Typical end products:
High volume long production runs for end-consumer products. For example: vehicle bumpers, plastic sheeting for road construction, automotive components. It is a part manufacturing process and is not based on lot sizes i.e. weight.

Process:
Compounding and injection moulding:
The raw materials are fed into the heated barrel of a twin screw extruder. Here the recipe will be mixed to achieve a homogenous blend and the molten plastic is fed directly into a melt buffer and then to an injection unit where the melt is forced into a mould cavity. Once the plastic has cooled and hardened the mould opens and the part is ejected.

Compounding and extrusion:
The raw materials are fed into the heated barrel of a twin screw extruder. Here the recipe will be mixed to achieve a homogenous blend and the molten plastic is fed directly into a secondary screw or gear pump where the melt will be forced through a die producing a product with a fixed cross-sectional profile.

Typical materials being processed:
Use of raw polymers in granular form, regrind and compounds but also powders, fibres, liquids and gases.

Description of motan system/equipment used:
Drying, conveying as well as dosing and mixing systems with highest accuracy.

Typical dosing & mixing units:
Highly accurate, complex and flexible loss-in-weight dosing & mixing systems (SPECTROPLUS, SPECTROFLEX ER, SPECTROFLEX M, CT and CV units).