Extrusion for Package Profile Formation
4 patents in this list
Updated:
Modern packaging extrusion faces precision and efficiency demands, with throughput requirements often exceeding 500 kg/hr while maintaining dimensional tolerances within ±0.1mm. Traditional processes struggle with complex geometries and material variations, particularly when working with low melt index composites or specialized additives like calcium carbonate and wood flour that affect flow characteristics.
The fundamental challenge lies in balancing material flow dynamics, cooling control, and dimensional stability while maintaining production speeds that meet commercial requirements.
This page brings together solutions from recent research—including symmetric split channel dies for composite materials, staged cooling systems for thermoplastic starches, integrated thermoforming approaches, and additive-enhanced material processing. These and other approaches focus on achieving complex profiles while reducing waste, energy consumption, and production time in commercial packaging operations.
1. Extrusion Process for Forming Packaging Boxes with Complex Curved Surfaces Using Additive-Enhanced Plasticized Material
SHISHI JINHE PACKAGING TECHNOLOGY CO LTD, 2020
A new extrusion process for making packaging boxes that allows complex shapes with curved surfaces, without the limitations and high costs of molding techniques like injection molding or stamping. The process involves extruding plasticized material, vacuum shaping it, cooling, pulling, and cutting to create the final box shape. The extruded material contains additives like calcium carbonate, wood flour, coupling agent, talc, and graphite flame retardant. This allows shaping the plastic into intricate forms during extrusion, followed by further shaping, cooling, pulling, and cutting steps to create the finished box.
2. Extrusion Die with Symmetric Split and Expanding Channel Layout for Low Melt Index Composite Materials
LUO YAN, Luo Yan, 2019
Composite material sheet extrusion die for processing low melt index materials like composites with high fiber content. The die has a unique channel layout to ensure consistent sheet thickness when extruding low melt index materials. The die has a central feed channel with symmetric split channels on each side. Below the split channels are equally spaced extrusion channels. The channel cross-section increases from the center to the sides. This allows balanced flow and prevents thickness variation when extruding composites with low melt index.
3. Staged Cooling System for Extruded Thermoplastic Starch with Sequential Water and Air Cooling Steps
KIMBERLY-CLARK WORLDWIDE INC, 2017
Processing thermoplastic starch compositions by selectively cooling the extruded material in stages to prevent water absorption and maintain processability. The stages include a water cooling step followed by an air cooling step. The initial water cooling duration is optimized to prevent excessive starch swelling. This allows efficient extrusion and cooling of thermoplastic starches without needing costly waterless systems.
4. Integrated Thermoforming and Extrusion Machine with Direct Sheet Transfer and Continuous Heating System
MET ILERI TEKNOLOJI SISTEMLERI MUEHENDISLIK IMALAT ITHALAT VE IHRACAT TICARET LTD SIRKETI, 2016
Integrated thermoforming and extrusion machine for reducing material, time, and energy consumption compared to separate extrusion and thermoforming processes. The machine has an extruder, calender, cutting units, heating oven, forming station, and secondary cutting unit. After extruding the plastic sheet, it goes directly into thermoforming without cooling or cutting steps. The sheet is heated lower in the forming station since it already has some heat from extrusion. This avoids waste from edge thickening and cooling, and reduces time and energy by combining the processes.
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