Custom Stainless Steel Extruder Screen Packs
Stainless steel extruder screen packs combine one or more woven wire mesh layers to filter polymer melt before the die. A useful RFQ defines every layer, the pack diameter or profile, edge construction, flow direction and the screen-changer interface.
What an Extruder Screen Pack Must Control
Particle retention
The fine layer is selected around the contamination and process requirement, not mesh count alone.
Layer stability
Coarse layers or perforated supports can stabilize fine mesh under melt-flow loading.
Equipment fit
Diameter, profile, thickness and edge must match the breaker plate or screen changer.
Repeatable installation
Bonded, spot-welded or rimmed packs help preserve a defined layer sequence during handling.
Extruder Screen Pack Specification Checklist
A request such as “80 mesh, 100 mm” is incomplete. Pair mesh count with wire diameter or aperture and list the complete layer stack from the melt-entry side to the exit side.
| RFQ field | Information to provide | Why it matters |
|---|---|---|
| Pack geometry | OD, ID if any, shape, thickness and tolerances | Controls fit and sealing in the changer |
| Each mesh layer | Mesh count plus wire diameter or aperture, weave and material | Defines opening, open area and strength |
| Layer sequence | Upstream-to-downstream order and flow direction | Prevents ambiguity in multilayer assembly |
| Edge construction | Plain cut, spot welded, bonded or rimmed | Affects handling, pack integrity and usable area |
| Process context | Polymer, temperature, pressure condition, changer type and objective | Supports an appropriate construction review |
Screen Changer Interface and Layer Schedule
Write the screen pack as an ordered schedule rather than an unordered list of mesh counts. The same three layers assembled in reverse order can behave differently under the installed melt-flow direction. The screen changer drawing must control the pack profile, seat, usable area and allowable thickness.
| Schedule field | Example notation | Required clarification |
|---|---|---|
| Flow direction | Melt entry → exit | Mark the physical upstream side on the drawing |
| Layer 1 | Coarse protective mesh | Mesh count, wire diameter, weave and material |
| Layer 2 | Fine filtration mesh | Opening or rating basis plus full mesh construction |
| Layer 3 | Downstream support | Support type, orientation and attachment |
| Pack edge | Plain, spot welded, bonded or rimmed | Finished thickness, usable area and permitted projections |
| Changer fit | OD/profile, seat and clearance | Datums, tolerance, orientation feature and sealing/contact face |
Defined media and support layers
Finished rimmed screen packs
Single-Layer and Multilayer Constructions
A single woven disc is suitable when one mesh construction provides the required retention and mechanical behavior. A multilayer pack can combine a coarse protective layer, one or more filtration layers and a downstream support layer.
The exact sequence is application-specific. Show flow direction and identify every layer on the drawing or purchase specification.
Mesh, Aperture and Weave Selection
Do not select by mesh count alone
For square woven mesh, clear aperture depends on both mesh count and wire diameter. The mesh-to-micron chart and calculator is a useful starting reference when these values are known.
Stainless steel wire mesh offers square-opening constructions, while Dutch weave wire mesh uses a different pore structure and should not be assigned a rating by a simple square-mesh formula.
Product Examples and Available Configurations
These Maidong product images show representative mesh discs, rimmed packs and support combinations. They are construction examples, not claims that one arrangement fits every polymer process.
Round rimmed screen pack production
Custom diameters and mesh grades
Drawing-Based Configuration Options
- Round, oval, rectangular or profile-cut shapes
- Single-layer or defined multilayer stacks
- Plain-cut, spot-welded, bonded or rimmed edges
- Coarse woven or perforated support layers
- Central holes, locating features or orientation marks
- Custom dimensions and tolerances from drawings
Extruder Screen Pack vs General Filter Disc
Extruder screen pack
Defined for polymer melt service, often with an ordered multilayer stack and a screen-changer interface.
General wire mesh filter disc
A cut or edged mesh element used across many liquid, gas and equipment filtration duties.
Sintered filter disc
A diffusion-bonded porous structure selected when a rigid integrated laminate is required.
Compare the broader stainless steel filter disc range and the rigid sintered wire mesh filter disc. For plastics processing context, see plastics and chemical fiber filtration applications.
How to Specify an Extruder Screen Pack
1. Define the process
State polymer, contamination concern, changer type and operating conditions.
2. Fix the geometry
Provide diameter or profile, thickness, tolerances and interface drawing.
3. List every layer
Specify mesh count with wire diameter or aperture, weave and material.
4. Confirm the sequence
Mark flow direction, support layers and upstream-to-downstream order.
5. Complete the RFQ
Add edge construction, quantity, packaging and required documentation.
Spin Pack Filter Screens for Fiber Spinning
A spin pack is a fiber-extrusion interface, not a new filtration rating
In synthetic-fiber processing, a spin-pack filter screen is a drawing-defined mesh component or layer stack installed before the spinneret. The purchase specification must define the cavity profile, complete layer order, flow direction, edge construction and polymer duty.
The term spin pack describes the installed process assembly. It does not by itself define mesh opening, micron retention, pressure capability or compatibility. Maidong supplies the wire-mesh screen component to the customer drawing and specification.
Cavity fit
Diameter or profile, total thickness, center opening, orientation and tolerance.
Layer identity
Mesh count plus wire diameter or aperture, weave, alloy and quantity of each layer.
Flow order
Mark polymer entry and exit sides and list the stack in that physical order.
Finished edge
Define plain-cut, attached, bonded or rimmed construction and usable area.
| Spin-pack RFQ field | Information to provide | Purpose |
|---|---|---|
| Installed profile | Diameter or outline, thickness, center opening, orientation features and tolerances | Matches the customer-defined spin-pack cavity |
| Layer schedule | Every mesh layer, wire diameter/aperture, weave and upstream-to-downstream order | Separates retention, distribution and support functions |
| Edge construction | Plain, spot attached, bonded or rimmed; allowable projection and usable area | Controls handling and installed fit |
| Polymer duty | Polymer or spinning process, temperature, pressure condition and contamination objective | Provides application context without inventing a universal rating |
For wider industry context, see plastics and chemical fiber filtration applications. Send the spin-pack drawing and layer schedule through the RFQ contact page.
Stainless Steel Extruder Screen Pack FAQ
An extruder screen pack is one or more wire mesh layers installed in the melt flow path to retain contamination and support stable polymer processing. The required layer sequence depends on the material, screen changer and filtration objective.
Provide the screen changer or cavity dimensions, outside diameter or shape, layer sequence, mesh count and wire diameter or aperture for each layer, weave, material, edge construction, quantity and polymer process conditions.
No. Mesh count must be paired with wire diameter and weave. The same mesh count can have different clear openings, open area and flow behavior when wire diameter or weave changes.
A coarse woven mesh or perforated support layer can help protect and stabilize a finer filtration layer. Its placement and orientation should be defined in the approved layer sequence.
Yes. Round discs are common, but oval, rectangular, kidney-shaped and drawing-specific profiles can be reviewed. Critical dimensions, tolerances and orientation features should be shown.
Only as an approximate reference for square woven mesh when wire diameter is known. Dutch weave and multilayer screen packs require construction-specific data rather than a simple mesh-to-micron conversion.
Request a Custom Extruder Screen Pack Quotation
Send the pack dimensions, complete mesh-layer sequence, material, edge construction, flow direction, screen-changer details, polymer process conditions and quantity for review.