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Auxiliary equipment · Feeding
Auto Loader & Dosing Unit (Auxiliary)
Auto loaders carry resin from storage to the extruder hopper; dosing units mix masterbatch and additives at accurate ratios. Both are auxiliary equipment quoted with your extrusion line.
Definition
Why automatic feeding and dosing matter
Manual resin handling is labour-heavy and inconsistent. An auto loader keeps the extruder fed without interruptions, while a dosing unit meters masterbatch and additives at a set ratio — the same recipe every shift, which directly stabilises film colour and thickness.
Specifications
What to specify
| Parameter | Details |
|---|---|
| Number of extruders | Each extruder needs its own feed and dosing arrangement. |
| Throughput | Loader capacity must match the line's kg/h consumption. |
| Materials | Pellets, regrind and masterbatch have different flow properties. |
| Dosing accuracy | Weight-based dosing gives tighter ratios than volumetric. |
| Recipe control | Multi-component dosing keeps additive ratios repeatable. |
In the line
Where it sits in the line
From storage to hopper
The loader conveys resin to each extruder hopper automatically.
At the hopper
The dosing unit mixes masterbatch and additives at the set ratio.
Through the extruder
Consistent feed and ratios reduce thickness variation and colour shift.
How to choose
How to match feeding and dosing
Count your extruders
Blown film lines with two or three extruders need multi-station systems.
State throughput and materials
Capacity and material type decide loader size and dosing method.
Ask for a line proposal
Feeding and dosing are configured with the line and quoted as auxiliary equipment.
Buyers ask
Frequently asked
questions
What is the difference between loader and dosing unit?
The loader moves resin into the hopper; the dosing unit meters and mixes additives at a controlled ratio.
Does dosing improve film quality?
Consistent masterbatch ratios reduce colour and thickness variation across production runs.
Can it handle regrind?
Yes — regrind and virgin pellets can be blended at a set ratio, which is common in recycled-content film production.
Is it a separate purchase?
It is auxiliary equipment and can be quoted together with the extrusion line.
Get your custom solution
Plan your line
with our engineers
Tell our engineering team your material, output target and facility conditions. We design and build machinery to match — average response time 4 hours.
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