Sceadwian
Banned
This isn't exactly a robotics question, but it's related to a common material used in it. I have some Sterilite (brand) containers that are made from clear (foggy white) plastic with a #5 (Polypropylene) recycling mark on the bottom.
The problem is some of the drawers are warped. A couple of the drawers were warped juuust enough to keep them from closing properly and completely. Random heat gun tests made the warping worse not better as I wasn't able to figure out the various states the plastic was in during heating and cooling.
Any experts here on this type of plastic? I want to basicaly after I obtain the position they need to be in heat them to the point where it aneals (relaxes all internal stressing) but not melts, and then cool it so that it keeps the form it was in when it was annealed.
I think this might require heating to a specific temperature and then cooling gradually but I don't know to what temperature and and what rate the cooling needs to be done. Can anyone provide reference? As best as I can tell it's not cross linked Polypro, it zippers just fine if torn.
The problem is some of the drawers are warped. A couple of the drawers were warped juuust enough to keep them from closing properly and completely. Random heat gun tests made the warping worse not better as I wasn't able to figure out the various states the plastic was in during heating and cooling.
Any experts here on this type of plastic? I want to basicaly after I obtain the position they need to be in heat them to the point where it aneals (relaxes all internal stressing) but not melts, and then cool it so that it keeps the form it was in when it was annealed.
I think this might require heating to a specific temperature and then cooling gradually but I don't know to what temperature and and what rate the cooling needs to be done. Can anyone provide reference? As best as I can tell it's not cross linked Polypro, it zippers just fine if torn.
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