Blown Film DIE

Flat Plate or "Pancake" Blown Film Die

Our patent pending "Pancake" Blown Film Die design integrates sets of three round plates that offer uniform gaps to minimize flow variations. Each Plate in the three-plate layer arrangement is aligned with precision via special tapered expanding pins. This pin design allows for repeatable precise alignment of all parts.

Process and blend multiple Blown Film Dies Materials with varying thermal properties for longer periods of time by isolating the temperature of different layers. Extrude various polymer materials into 3-10 Layer Blown Film with the capability to process materials with significant alternate melt temperatures or other properties in adjoining layers.

ADVANTAGES of Precision Flat Plate Blown-Film Die:

Outstanding Minimal Thickness Variation Without Additional Gauge Control
Blown Film Dies Amplified Production Rates from Reduced Down Time
Optimizing Temperature Control and Quicker Heating Abilities Through a Central Pin Integrating Internal Heaters
Low Leakage and Maintenance Issues
Capable of Processing Multiple Materials with Alternate Melt Temperatures or Other Properties

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Split Flow Channels

The flow splitting channels, located between the top and middle plate, direct circulating polymer from the die entrance location to each spiral. Polymer flow follows round cross-section split flow passages to the spiral dispersion zone which avoids dead zones and hang-up locations creating precise channel lengths for each individual spiral.

How It Works

Outstanding Minimal Thickness Variation Without Additional Gauge Control

The split flow design allows for the optimal thermal consistency and polymer dispersion and improves mixing in the spiral distribution zone; which is located between the second and third plates. Once the polymer flows across the spiral distribution zone toward the central pin; the polymer travels vertically upward to the next layer or die lip. Internal heaters in the central pin assist start-up and preserve process control.

Amplified Production Rates from Reduced Down Time

Streamlined Flow Channel Design Minimizes the Total Flow Path Length per Layer
Higher Efficiency Material Transition
Simplified and Fast Assembly and Disassembly
Quicker Purge Times and Reduction in Polymer Residence Time
Reduced Time for Color Change Overs

Low Leakage and Maintenance Issues

Eliminating Port Holes
Removing Slip-Fit Components
Incorporating Tight Sealing Surfaces on Flat Faces

Advantages

Longer Production Runs
Less Down Time for Maintenance
Increased Production Rates
More Consistent Film Gauge
Easier Handling
Fewer Scheduled Maintenance Stops

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