Definition, Manufacturing Process and Technical Data of Extruder Screens

• Material: Metal
• Layers: Single-Layer or Multi-Layer
• Usage: Solid Filter
• Type: Filter Elements
• Hole Shape: Square
• Structure: Single-Layer or Multi-Layer
• Model NO.: Filtration
• Materials: Steel Plate
• Wire Size: Customized
• Samples: Available
• OEM or ODM: Accept
• Transport Package: Plywood Box
• Specification: Customizable
• Trademark: Tec-Sieve
• Origin: China
• HS Code: 7314140000
• Production Capacity: 1000 Pieces/Day

Product Description

Definition, Manufacturing Process and Technical Data of Extruder Screens

Definition of Extruder Screens
An extruder screen, commonly referred to as a screen pack, is a woven wire filtration system that is formed to filter all contaminants out of the melted plastic. Extruder screens are a necessity for any extruder of polymer or plastic.

Extruder screens are available in both single-layer and multi-layer configurations, and both configurations can be made into specific shapes and sizes.

In case of the multi-layer configurations, extruder screens are multi-layer wire filtration systems that are welded together and made into specific shapes and sizes.

The shape and size of extruder screens shall be dictated by your extruding machines.

When you select technical specifications including the number of layer and micron rating (mesh opening size) for your extruder screen mesh, there are three major considerations: Pressure requirements, the features of the material being filtered, and the desired level of decontaminants.

Most extruder screens found in the plastics industry are typically a square mesh weave ranging from 20-150 mesh and are made out of stainless steel to avoid corrosion/contact corrosion.

Manufacturing Process of Extruder Screens
Extruder screens are manufactured to lots of different specifications.
Here is how an extruder screen is manufactured:
1. Wire mesh specifications with appropriate micron ratings are chosen;
2. Materials are punched by using a sheet punching machine and compound tooling, thus forming specially shaped and sized mesh pieces;
3. The resultant mesh pieces are layered and joined together by using the spot welding operation;
4. The resultant extruder screens are cleaned;   
5. Clean extruder screens are shrink-wrapped in preparation for shipping.
Technical Data Sheet of Extruder Screens

Technical Data		Remark
Material	Stainless steel 201, 304 , 316 and so many more
Weave Type	Plain weave, twill weave and dutch weave	Dutch weave is suitable for finer filtration.
Wire diameter	Customizable	The combination of wire diameter and mesh opening size must be technically feasible!
Mesh opening size (Micron rating)	Customizable
Mesh Count	18, 20, 30, 40, 50,60, 80, 100, 120, 150, 165, 200, 250, 270, 300, 350, 400 and 500	Square mesh counts and associated micron ratings range from 18 mesh (1000 micron) to 500 mesh (25 micron).
Overall size	Customizable --Round screens: 10mm to 600mm; --Kidney-shaped screens: 60mmx80mm to 90mmx170mm	Subject to the customer's drawing or detailed written requirements.
Shape	Round, kidney-shaped, rectangle or oval, etc.	Subject to the customer's drawing or detailed written requirements.
Configuration type	Single-layer or multi-layer	Except for the single-layer configuration, extruder screens typically contain 2 to 5 layers of wire mesh.
Welding type	Spot welding	Extruder screens are properly spot welded to ensure they do not bend, stretch or break.

Most extruder screens are made of stainless steel and have a mesh count range of 20 to 150.
Due to the high temperature of the plastic melt, extruder screens are really the only solution that is both cheap and durable enough to make practical sense in a typical plastic extrusion process.

The price you can expect to pay for extruder screens is going to depend on a number of factors including:
- Size
- Shape
- Number of layers
- Quantity purchased
- The cost of each individual mesh specification chosen
- Any special processing required
- Alloy