plastic extruder filter -slide plate two working station hydraulic screen changer
Plastic Extrusion Single-Plate Dual-Station Screen Changer is a critical piece of equipment on plastic extrusion production lines for filtering melt impurities. It enables screen replacement without stopping production, ensuring continuous operation. Below is a detailed introduction:
Structural Components
Slide Plate and Filter Channels: The slide plate features two independent filter channels, each fitted with a removable perforated plate (i.e., filter screen). One station operates while the other serves as a standby.
Hydraulic Drive System:
Comprising hydraulic cylinders and other components, this system uses hydraulic fluid to drive the slide plate's reciprocating motion, enabling rapid station switching.
Sealing and Compensation Mechanism:
Employs pressure-driven rigid sealing technology. The sealing gap automatically compensates during operation to prevent material leakage.
Heating and Insulation System:
Typically equipped with electric heating or thermal fluid heating devices to maintain stable temperatures in the filter area, preventing melt solidification or degradation.
Working Principle
During normal production, molten material passes through the working station's filter screen, where impurities are intercepted. Purified material flows to subsequent die heads. When pressure increases due to impurity buildup on the working filter, the hydraulic system activates, moving the slide plate to engage the clean spare filter. The contaminated filter retracts to the change position. This entire process occurs without shutdown, maintaining uninterrupted material flow.
Features
Rapid Screen Change: Hydraulic drive achieves extremely short station switching times (typically ≤1 second), significantly boosting production efficiency.
Reliable Sealing: Pressure-driven rigid sealing technology with automatic clearance compensation effectively prevents material leakage, ensuring stable extrusion pressure and reducing product defects.
High Pressure/Temperature Resistance: Withstands operating pressures up to 50MPa and temperatures ≤350°C, suitable for processing various plastic materials.
User-Friendly Operation: Filters can be quickly disassembled and replaced for easy cleaning and maintenance. Supports multiple customization options to adapt to different operating conditions.
Compact Size with Short Flow Path: Features an integrated structure with a small footprint and short flow path, compatible with extruders of various standards.
Application Areas
Widely used in the polymer materials processing industry, including film production, pipe and sheet manufacturing, wire and fiber production in plastic extrusion, as well as rubber processing, recycled plastic production, ceramic processing, and adhesive and coating manufacturing.
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