Styrofoam/EPS shredder
Description
Hi all. recently i build a drill powered mini styrofoam/EPS shredder. Recycle old styrofoam and shred them to usable styrofoam beads for whatever project you need them. an easy and free solution and above all, powered with a cordless drill. The parts are cut from scrap wood pieces (4mm), especially the wooden blades In the file section you will find are all parts needed to build your own. parts are nested to a 20x30 working area. Be very carefull with your fingers, this is not a toy! The box can be cut from 4mm plywood. The blades can have every width. First build the entire box (dont glue the bottom and side yet). place a 608zz ball bearing in the slots on the side panels. the triangles should be glued on the under side of the diagonal plates that guide the styrofoam to the blades. this way the plates wont bend when styrofoam gets in between the blades, and the guide plates. as a shaft i use a 10mm rod (can be threaded) 3 blade versions should be in sequence. slide one piece on the rod, add some wood glue on top and slide on the next piece. a thin metal rod can be inserted in the small holes to align the blades. stack as many blades as needed. Test fit the full stack of blades to fit between the bearings with about 10mm to spare on each side. (from now i call this part the barrel) to prevent the shaft from slipping on the barrel i added a metal washer on both ends of the barrel and spot welded them on the shaft. drilled two holes in the washer and use a long screw to attach the washer to the barrel. The barrel is finished now and the shaft wont slip. remove one side of the box so the barrel can be placed in the ball bearings. The box can be closed now. on both sides, the shaft should stick out of the box. here you can attach a cordless drill or other motor at first the blades can slightly hit the guide blades but this will wear out pretty fast for a perfect fit. on the backside of the box is a large hole. here you can attach a vaccuum cleaner or other blower/fan to capture the styrofoam beads and reduces the overall mess. i build this device to shred a huge amount of styrofoam. i needed about 2000 liter to mix with concrete to form styrocrete. styrocrete is a lightweight concrete with a good thermal insulation. i used this to build my inground swimming pool. The entire project can be seen on my YT channel. too bad i made the video when i allready used and abused the shredder and dropped it twice. thats why its covered in ducttape but it did an awesome job in shredding and saved me a lot of money in the end. wish i made some pictures of the building progress. hope you all have a good time building the shredder. https://www.youtube.com/watch?v=olg4kGXyLv8
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