I think it's a cool idea, especially using the rollers to ensure a constant thickness. To be honest, the thickness of the pullstrustion method is also variable as there is no standard bottle thickness and the preparation of recycled bottles often involves pressurizing them internally and then using a heat gun to remove corrugations in the bottle design - leading to a variable width depending on how the internal pressure and heat conspire to inflate the bottle. I have a couple of questions regarding your proposed design: 1. Assuming the cutters do their job, wont the cut-off material have a higher thermal history when it's re-introduced to the hopper - thus de-valorizing the material? 2. Wont the rollers and their speed introduce the exact same issue of dependency upon a single rate in the linear process? 3. How will the ribbon be turned into a solid core filament? Pullstrusion relies upon merely shaping the plastic and not actually remelting it - wont we need some kind of spiralization process to turn the ribbon into a jellyroll?
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I think it's a cool idea, especially using the rollers to ensure a constant thickness. To be honest, the thickness of the pullstrustion method is also variable as there is no standard bottle thickness and the preparation of recycled bottles often involves pressurizing them internally and then using a heat gun to remove corrugations in the bottle design - leading to a variable width depending on how the internal pressure and heat conspire to inflate the bottle.
I have a couple of questions regarding your proposed design:
1. Assuming the cutters do their job, wont the cut-off material have a higher thermal history when it's re-introduced to the hopper - thus de-valorizing the material?
2. Wont the rollers and their speed introduce the exact same issue of dependency upon a single rate in the linear process?
3. How will the ribbon be turned into a solid core filament? Pullstrusion relies upon merely shaping the plastic and not actually remelting it - wont we need some kind of spiralization process to turn the ribbon into a jellyroll?