Melt Filtration Systems
Slide Plate Screen Changers
Introduction
Slide Plate Screen Changers are designed for continuous and high-efficiency melt filtration in polymer extrusion processes. Utilizing a precision slide plate mechanism, these systems enable rapid screen replacement while maintaining reliable sealing performance and stable melt flow.
The series includes hydraulic, continuous, four-screen circulating, and double slide plate configurations to meet different production capacities and process requirements, providing reliable filtration solutions for polymer compounding, recycling, pelletizing, and extrusion applications.
Overview
Slide Plate Screen Changers are installed between the extruder and downstream processing equipment to remove contaminants from molten polymers before they enter the die, pelletizer, or molding system.
Depending on the production process, different slide plate configurations provide varying levels of production continuity, filtration area, and screen replacement efficiency. Hydraulic models reduce manual intervention, continuous slide plate systems minimize pressure fluctuations during screen replacement, four-screen circulating designs extend uninterrupted operating time, and double slide plate configurations increase filtration capacity for higher throughput applications. Together, they provide flexible solutions for medium- and high-capacity extrusion lines.
Hydraulic Slide Plate Screen Changer
Key Features
- Hydraulic accumulator-assisted screen changing for rapid and reliable operation.
- Dual working positions enable fast switching between operating and standby screens.
- Large filtration area with high filtration efficiency.
- Stable melt pressure with minimal process interruption.
- High-temperature and high-pressure resistant construction.
- Easy operation and low maintenance requirements.
Continuous Slide Plate Screen Changer
Key Features
- Patented sliding plate design for uninterrupted continuous production.
- Continuous screen changing with stable melt pressure and low pressure fluctuation.
- Large filtration area improves filtration efficiency.
- Reduces screen-changing workload compared with conventional systems.
- Simple screen replacement and easy maintenance.
- Suitable for continuous extrusion processes requiring stable product quality.
Four-Screen Circulating Screen Changer
Key Features
- Four independent filter blocks operate sequentially for continuous production.
- Stable melt pressure, flow rate, and temperature during screen changing.
- No production interruption or material leakage during operation.
- Independent filter blocks simplify cleaning and maintenance.
- Unique preheating and venting design improves process stability.
- Excellent sealing performance with long service life.
Double Slide Plate Screen Changer
Key Features
- Double slide plate structure provides an enlarged filtration area.
- Alternating screen replacement enables uninterrupted production.
- High sealing performance under elevated temperature and pressure.
- Stable melt flow with minimal pressure fluctuation.
- Designed for medium- to high-capacity extrusion lines.
- Heavy-duty construction ensures reliable long-term operation.
Technical Specifications
| Model | Product Type | Filter Size | Capacity | Heating Power | Max. Pressure |
|---|---|---|---|---|---|
| DHB-70 ~ DHB-500 | Hydraulic Slide Plate Screen Changer | Ø70 – Ø500 mm | 60–6000 kg/h | 2.0–40 kW | ≤15–50 MPa |
| DHBL-80 ~ DHBL-200 | Continuous Slide Plate Screen Changer | 70 × 70 – 190 × 170 mm | ≤250–1200 kg/h | 3.0–8.0 kW | ≤30–40 MPa |
| DHX-70 ~ DHX-200 | Four-Screen Circulating Screen Changer | Ø70 – Ø200 mm | 60–1300 kg/h | 3.0–11.5 kW | ≤25–35 MPa |
Key Technologies
- Precision slide plate mechanism for fast and accurate screen positioning
- Hydraulic screen replacement for improved operating efficiency
- Continuous slide plate technology for reduced pressure fluctuation
- Four-screen circulating design for extended uninterrupted production
- Double slide plate structure providing larger effective filtration area
- Optimized melt flow channels to reduce pressure loss and melt residence time
- High-temperature sealing system ensuring reliable operation under demanding extrusion conditions
- Modular construction supporting various filtration areas and production capacities
Note
The Slide Plate Screen Changer series offers multiple configurations for different production requirements:
- Hydraulic Slide Plate Screen Changer – A standard hydraulic solution for fast and reliable screen replacement in general extrusion applications.
- Continuous Slide Plate Screen Changer – Designed to minimize pressure fluctuation and maintain stable melt flow during screen replacement.
- Four-Screen Circulating Screen Changer – Features four independent screen positions for longer continuous operation and reduced screen change frequency.
- Double Slide Plate Screen Changer – Provides increased filtration area and extended operating cycles for higher throughput extrusion lines.
For applications requiring fully automatic filtration, online backflushing, or processing of highly contaminated recycled materials, Piston Screen Changers, Belt Screen Changers, or Meshless Self-Cleaning Filters are recommended.
Applications
Slide Plate Screen Changers are suitable for suitable for continuous thermoplastic extrusion processes, including:
- Polymer Compounding
- Masterbatch Production
- Plastic Recycling
- Pelletizing
- Pipe Extrusion
- Sheet & Board Extrusion
- Film Extrusion
- Profile Extrusion
- Wire & Cable Compounds
- Engineering Plastics Processing
Applicable polymers include:PE / PP / PS / ABS / PET / PA / PC / EVA / TPU / Other thermoplastic materials
Interested in This Product?
If you’re interested in this product or have a specific application in mind, feel free to contact us. Share your material, process requirements, production capacity, and application details, and our team will recommend the most suitable configuration and technical solution to meet your production needs.
Our engineering team will recommend the most suitable solution.