A 135 mm screw and barrel is a heavy-duty extrusion component used in large plastic extruders. The screw rotates inside the barrel to melt, mix, compress, and push plastic material (PE, PP, PVC, ABS, etc.) through the die to produce products like films, pipes, sheets, and granules.

Main Technical Specifications

These materials and treatments are used to improve wear resistance, corrosion resistance, and durability in high-temperature plastic processing.

Screw Structure

The screw normally has three functional zones:

1️⃣ Feed Zone

• Plastic pellets enter from hopper.

• Screw flights move material forward.

2️⃣ Compression Zone

• Plastic begins melting due to heat and friction.

3️⃣ Metering Zone

• Melt becomes uniform before exiting to the die.

Different screw designs may include:

• Barrier screw

• Mixing screw

• Pin screw

• Vent screw

These designs help improve melting efficiency and mixing.

Barrel Features

• High-precision inner bore

• Nitrided or bimetallic lining

• High wear resistance

• Good heat transfer

Barrels may be integral or segmented, depending on machine design.

Typical Extruder Capacity (135 mm)

In large extruder systems:

• Capacity: about 500 – 550 kg/hour

• Heating power: about 63 kW

• Motor transmission power: about 90 kW

These values depend on material and machine configuration.

Applications

A 135 mm screw and barrel is commonly used for:

• Plastic blown film machines

• Plastic pipe extrusion

• Plastic sheet extrusion

• Recycling pelletizing machines

• Compounding lines

It can process materials such as:

• LDPE

• HDPE

• PP

• PVC

• ABS

• PET

Key Advantages

• High production capacity

• Long service life

• Excellent wear resistance

• Stable plastic melting performance

• Suitable for heavy industrial extrusion lines