Loss-in-weight dosing

Loss-in-weight dosering voor extrusie – Plastima

Loss-in-weight dosing for extrusion

In loss-in-weight mode, each component is dosed simultaneously and continuously, with the materials mixing naturally before the single or twin screw extruder. This technique is widely used in extrusion. For small dosages, augers with brushless motors ensure accuracy and repeatability; for larger dosages, vibrating feeders with their own microprocessor control deliver a constant, stable material flow. The PLC is fully linked to the extruder controls and regulates the process in real time.

Technical features:

Compact, modular frame for 1 to 12 dosing stations
Stations on load cells for high dosing accuracy
Pneumatic refill valves directly on the frame
PLC control with weighing cards and 7" colour touchscreen
Vibrating feeders for flakes and granulate; auger stations for low throughput

Added value:

Quick colour change and cleaning
Customer-specific layout of the dosing system
Ideal for single and twin screw extruders
Real-time display of recipe composition and actual consumption
Magnetic grid per buffer hopper possible; Profinet/OPC-UA

Vibrating feeder

Width (mm)	Hopper volume (dm³)	Throughput granulate (kg/h) *	Throughput flakes (kg/h) *
50	35	3–70	–
100	35	10–200	–
150	160	30–800	30–200
250	160	100–2000	30–1000
300	160	300–4000	200–2500

* Depending on the material. Granulate ± 0.8 kg/dm³, flakes ± 0.3 kg/dm³.

Augers

Screw type (D×P) mm	Hopper volume (dm³)	Throughput granulate (kg/h) *
12 × 8	35	0,2–0,8
16 × 10	35	1–15
30 × 20	80	3–40
30 × 20	80	8–80
50 × 50	160	50–500
80 × 80	160	120–1200

Loss-in-weight dosing for powders and granulate

For accurate, continuous and fully controlled dosing of both powders and granulate, loss-in-weight dosing offers high precision and repeatability. The same system processes fine powders, coarse powders and free-flowing granulate — ideal for multi-material production lines. For less free-flowing powders, an integrated agitator ensures a constant, homogeneous material flow and prevents bridging, segregation and blockages. All product-contact parts are stainless steel for maximum corrosion resistance and easy cleaning; material consumption is monitored in real time.

Technical features:

Loss-in-weight dosing for precise, continuous and reliable control
Real-time monitoring of material consumption and dosing accuracy
Stainless steel contact parts for corrosion resistance and easy cleaning
Versatile for powders and granulate (fine, coarse and free-flowing)
Integrated agitator for poorly flowing powders
Quick material change for multiple recipes
User-friendly PLC control with touchscreen
Flexible integration via Profinet/OPC-UA

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Dosing & mixing

Continuously controlled dosing

Loss-in-weight dosing for extrusion

Loss-in-weight dosing for powders and granulate

Dosing & mixing brochure

Contact details

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