Industrial sourcing · China to Europe

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Buyer guide · Plastics & molding

Plastic extrusion line from China

An extrusion line is an extruder plus everything after the die, and quotes compare the extruder while the product is decided by the die, the cooling and the haul-off that follow it.

Ask about this machine ↗Where the numbers come from

Written and listings checked 30 September 2026. Every figure on this page names its source.

What you are actually comparing.

Two quotes, one machine name

What hides inside the price

Single screw or twin screw

Polyolefins such as PE and PP usually run on a single screw. Rigid PVC dry blend usually needs a conical or parallel twin screw. A quote that offers one extruder for every polymer is a warning.

Screw length and barrel treatment

Ask for the length to diameter ratio, the screw steel and its hardening, and whether the barrel is bimetallic. Filled and recycled recipes wear a nitrided screw fast.

Die and calibration

The die shapes the melt; the calibrator or roll stack fixes final size. Both are usually made for one product. Ask which sizes are in the price.

Downstream length

Cooling tanks, haul-off and cutter or winder must be long and strong enough for your speed. A short cooling section limits output whatever the extruder can push.

Gravimetric dosing and melt pump

Ask whether dosing is by weight or volume, and whether a melt pump steadies output ahead of the die. Both decide how close you can run to minimum wall.

Decode the model code.

Chinese extruder codes are usually real. SJ marks a single-screw extruder, followed by screw diameter and length to diameter ratio: SJ65/33 is a 65 mm screw, 33 diameters long. SJZ marks a conical twin screw, followed by the small and large screw end diameters, as in SJZ65/132. Neither code states output.

SJ65/33: 65 mm x 33 = 2,145 mm of flighted screw length.

Before you ask for a price.

Send these with the enquiry. Without them, any number a factory gives you is a guess dressed as a quotation.

The product: pipe, profile, sheet, film, strap or filament, with a drawing and tolerance.
Polymer and recipe, with fillers, regrind and additives.
Output in kilograms per hour, or meters per minute at a stated wall or thickness.
Every product size you want to make, since each can need its own die and calibrator.
Hall length, cooling water supply and electrical capacity.

Turn the claim into a demonstration.

Require this	A pass looks like
Run your recipe to steady state, then weigh product over a timed hour.	Hourly output matches the offer on your product, not on a stock sample.
Measure the critical dimensions of product from the start and end of the run.	All dimensions inside your drawing tolerance.
Record screw speed, motor load and melt pressure through the run.	Readings stable, with motor load below the rated value stated in the offer.

The documents that must arrive with it.

EU Declaration of Conformity for the whole line, under 2006/42/EC or, for delivery from 20 January 2027, Regulation (EU) 2023/1230, with 2014/35/EU and 2014/30/EU.
Standards list; ask whether the EN 1114 series for extruders and downstream equipment was applied.
Screw, barrel and die drawings, with steel grades.

The one people forget. One declaration covering the assembled line. Separate papers for each machine leave you to prove how they work together.

When this is the wrong machine.

Buy something else if

Named, not hedged

You know the product is pipe, profile or sheet.

Read the page for that line: each has its own die, calibration and test method.

You want pellets from recycled plastic, not a finished product.

A plastic pelletizing machine, which adds degassing, melt filtration and a cutter instead of a forming die.

Where the numbers come from.

We name the kind of source, how many and when, and never the factory. Listed prices are asking prices, not landed cost. Where we do not hold a fact we say so: that is a GAP, not an estimate.

Listings · 21Twenty-one marketplace machine listings under plastic extrusion, checked September 2026, advertised FOB asking prices from US$30,000 to US$1,200,000, the top end for composite pipe lines. Asking prices, not landed cost.
Listings · 3Three further listings in the same search, checked September 2026, sold extruded window profiles, sills or pipe by the piece, not machines.
ArithmeticSJ65/33: 65 mm x 33 = 2,145 mm of screw length.
GAPGAP - no supplier quotations logged for this machine yet. Three to five quotations for one configuration would give a real price spread.

Related machines.

Plastic pipe extrusion line. Go there if your product is pipe, where pressure rating and wall control lead the decision.
Plastic profile extrusion line. Go there for window, panel or trim profiles, where the die and calibrator are the cost.

Every machine we source in this area is on the Plastics & molding page. How a project runs, stage by stage, is on how it works, and what it costs is on pricing.

Straight answers

Questions buyers ask about this machine.

What is the best plastic extrusion line from China?+

One whose screw suits your polymer and whose die and downstream were built for your product. The extruder alone says little.

Plastic extrusion line sourcing guide: what do I send suppliers first?+

Product drawing, recipe and target output. Ask each to name the extruder model, the die, and every downstream unit with its length and drive.

What does a plastic extrusion line inspection checklist include?+

Screw and barrel hardness certificates, heater zones, die finish, cooling, haul-off, cutter accuracy, guarding, and a timed run on your recipe.

Who is the EU importer for an extrusion line bought in China?+

If you buy directly, it is usually you. Check that one Declaration of Conformity covers the complete line and that your details appear on the documents.

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