In PUR hot melt adhesive extrusion production lines, the combined application of dual-column large filter cartridge changers and melt pumps represents an optimal solution for enhancing production efficiency and ensuring product quality. Through coordinated filtration, conveying, and regulation functions, they form a complete chain of “impurity interception - flow stabilization - performance optimization,” significantly improving production continuity and product consistency.
I. Core Function Analysis
Dual-Column Large Filter Cartridge Screen Changer
Non-Stop Screen Change: Features a dual-column, dual-station design with one screen in operation and one on standby. Rapid switching via hydraulic/pneumatic systems (within seconds) ensures continuous production, eliminating efficiency losses caused by downtime associated with traditional single-column screen changers.
High-Efficiency Filtration: The large filter cartridge design increases filtration area, effectively capturing impurities in PUR hot melt adhesive (e.g., unmelted particles, gels). This prevents clogging that could cause poor adhesive flow or uneven curing, ensuring product purity.
Flexible Adaptability: Supports selection of different mesh sizes based on adhesive viscosity and impurity content, balancing filtration effectiveness with production efficiency.
Melt Pump
Precise Flow Control: Utilizes gear meshing principles to eliminate feeding fluctuations, ensuring stable melt pressure and flow rate. Optimizes melt homogenization for enhanced adhesive performance (e.g., bonding strength, temperature resistance).
Corrosion-Resistant Materials: Constructed from stainless steel or specialized alloys to withstand PUR hot melt adhesive's high temperatures (typically 120-180°C) and high-viscosity environments, reducing equipment wear and maintenance costs.
Pressure Compensation: Compensates for extruder pressure fluctuations, preventing adhesive flow interruptions or overflow caused by unstable pressure to ensure production stability.
II. Collaborative Application Advantages
Enhanced Production Continuity
The dual-column screen changer enables non-stop screen changes. Combined with the melt pump's stable delivery, it reduces downtime by 10%-20%, significantly improving production line utilization.
Optimized Product Quality
The mesh changer filters impurities while the melt pump homogenizes the melt, providing dual assurance for adhesive purity and performance consistency. This reduces product defect rates to below 0.5% (compared to approximately 2%-3% in traditional processes).
Reduced Overall Costs
Minimized adhesive waste: Stable delivery prevents spillage, while filter screen replacement frequency decreases by 50%. Annual raw material cost savings reach approximately ¥200,000 (based on a medium-sized production line).
III. Typical Application Scenarios
High-Viscosity PUR Hot-Melt Adhesive Production
Melt pumps overcome the resistance of conveying high-viscosity materials, while screen changers filter out large particulate impurities. This setup is ideal for applications demanding superior adhesive performance, such as automotive interiors and packaging materials.
Continuous Filling Production Lines
Dual-column screen changers ensure continuous adhesive supply to filling heads, while melt pumps maintain stable pressure to prevent dripping. This setup enhances filling precision and speed, making it suitable for small-batch, high-value-added products like electronic components and textiles.
Recycled Material PUR Hot-Melt Adhesive Recovery
Screen changers efficiently filter impurities (e.g., paper scraps, plastic fragments) from recycled materials. Melt pumps homogenize the recycled melt, reducing raw material costs and supporting eco-friendly adhesive production.
The integrated application of dual-column large-cartridge screen changers and melt pumps delivers three core functions: non-stop screen changing, precise flow control, and efficient impurity filtration. This significantly boosts the efficiency and product quality of PUR hot melt adhesive extrusion lines. For enterprises pursuing high output, low waste, and stable quality, this solution is a key choice for optimizing production processes and enhancing market competitiveness.
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