Sevenstars Machinery's PVC window and door profile extrusion line combines extrusion, vacuum calibration, haul-off, cutting and stacking into a single synchronized system. The design is intended to support stable, continuous production of profiles used in building openings, where dimensional accuracy and physical performance affect service life. The line pairs a conical twin-screw extruder with multi-zone temperature control and a quick-change die system.
Production flow and system integration
PVC profile manufacturing is a continuous process in which small variations in plasticizing, calibration or haul-off can affect the finished profile. The line links material feeding, plasticizing extrusion, vacuum calibration and cooling, automatic haul-off and cutting, and automated stacking in one synchronized sequence.
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Material supply
: PVC resin compound enters the extruder.
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Plasticizing extrusion
: A conical twin-screw design is used for efficient plasticizing.
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Calibration and cooling
: A vacuum calibration table stabilizes profile geometry.
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Haul-off and cutting
: An automatic haul-off unit works with a fixed-length cutter.
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Finished-product stacking
: An automatic stacking system collects products and supports initial inspection.
The integrated arrangement is designed to keep line speed, dimensional control and product handling aligned across the production run, reducing the need for separate manual transfer steps between stages.
Core technical features
The line's main technical claims center on control of the extrusion process across different profile sizes and wall thicknesses.
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Technical feature
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Application value
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Conical twin-screw design
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Provides plasticizing performance and stable extrusion pressure for PVC and UPVC compounds.
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Multi-zone temperature control
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PLC and touchscreen control maintain temperature accuracy of ±1°C for consistent quality.
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Energy-saving drive system
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Reduces unit energy consumption and helps control long-term operating costs.
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Quick-change die design
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Shortens downtime during die changes and product changeovers.
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CE-certified electrical system
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Includes safety interlocks intended to protect operators.
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A conical twin-screw design is intended to deliver consistent plasticizing and stable extrusion pressure for PVC and UPVC compounds. Multi-zone temperature control, managed through a PLC and touchscreen interface, holds temperatures to within ±1°C, a specification the manufacturer says supports batch-to-batch quality consistency. An energy-saving drive system is included to lower unit power consumption, while the quick-change die design is intended to reduce downtime between product changes. The electrical system carries CE certification and includes safety interlocks.
Customization and specification adaptability
The line can be configured for profiles used in different window and door systems. Engineering teams can produce dies from customer drawings or samples, supporting common system widths of 60, 65, 70, 80, 88 and 95 mm, among others. Adjustable parameters allow the equipment to handle both high-volume standard profiles and custom shapes.
That flexibility is relevant for manufacturers serving markets with different window standards or requiring nonstandard profile geometries. The line can be matched to daily output requirements and profile wall thickness specifications, according to the manufacturer.
Frequently Asked Questions
What is the production capacity of the line?
Output ranges from 150 to 450 kg/h, depending on the specific machine configuration. The appropriate model should be selected based on daily output requirements and profile wall thickness specifications.
How is batch-to-batch quality consistency maintained?
The PLC control system and multi-zone temperature control, with ±1°C accuracy, monitor and adjust temperature fluctuations during plasticizing. This is intended to keep geometric accuracy and physical properties consistent across production batches.
Is changing dies for different profile specifications complex?
The line uses a quick-change die design intended to minimize downtime during die changes. After a die change, extrusion pressure and haul-off speed should be recalibrated to the new die parameters to support a stable production transition.
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