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plastic material grinder

$50 plastic shredder / grinder / recycler : 11 steps (with pictures) - instructables

$50 plastic shredder / grinder / recycler : 11 steps (with pictures) - instructables

Everyone in the DIY community and especially those who work with 3D printers, have one issue - plastic junk. It can be failed prints, project scrap leftovers, or maybe you are just looking for a way to shred and recycle your plastic at home.

There are many more links on youtube if you want to build a beast. Most of my plastic waste comes from failed prints and leftover strands of filament which I want to recycle into fresh filament using Filabot.

Time to hack a paper shredder to grind up my waste plastic. From the time the shredder arrived in the mail to putting together this instructable, the entire project has taken me 48 hours. If you follow all the instructions to the T, this is what you should be capable of grinding in about 24 hours-

STRIP CUT PAPER SHREDDERS WILL NOT WORK for this project (3 types of shredders). I already tried to bust open mine and replace the inner wheels with grooved washers and the like but its just not worth the effort.

We will be working with a CROSS CUT SHREDDER. If you have one already and don't mind busting it open, this instructable should work for you. If not, here is the only real expense involved in the project:

When I ordered mine new, it was <$50. There may be other economical options and I'm not Jeff Bezos, so go for it. Bear in mind, to chew and grind up plastic, we will need a pretty powerful motor and a gear drive train thats mostly metal or as little plastic as possible. This shredder seemed to have both so it worked for me.

Also, the CD shredding capability is completely useless for this project, so if you can find a powerful, economical/free one without it, thats perfect. We will be getting rid of the CD shredder completely.

First we need to test the shredder. Ignore this step if you are using the same shredder. The opening is too small for any part to fit through, so flip it over and run it in reverse. This step came in handy to realize that if the bottom grooved carriage allows for parts to go through, it might be worth keeping intact (which is a nightmare later during hacking). If it barely grinds even the smallest of parts, make note that it is expendable and move on.

For lack of a better term, let's call this "hack". The IR sensors and microswitch under the flap are vestigial and can be harvested for use in other projects. The IR sensor and receiver can be directly cut off the board. The flap microswitch can be cut off and the wire spliced with the alignment microswitch. Look at pictures. Test your circuit.

This part gets a bit tricky. The objective is to get rid of the top plastic cover over the rotors. Go though the dismantling process methodically and avoid using unnecessary brute force. This is the longest and most tedious part of the build and I apologize for the lack of pictures. But if you are at this stage with grease smeared hands, you will understand why.

You will end up unscrewing the end cover, the screws holding the plastic covers together and the screws holding the steel rods in place. I had to unscrew 3 of the 4 steel rods in order to get the covers off.

Once the two plastic covers are off, you have a choice to get rid of both or just the top. I suggest keeping the bottom to add rigidity and since it barely interfered with reverse grinding(Step 1), why not? The pictures make it seem like you should take both off. I changed my mind later and decided to dismantle again to add the bottom plastic cover. So you can skip that unnecessary step.

One piece of advice, don't work on a glass table like I did. This assembly is pretty heavy and the with the number of times it dropped on my table top during dismantling (the copious amounts of grease didn't help), its a miracle it didn't shatter.

For this part, I used my handy jigsaw with the thinnest blade I could find. Remember to cut off the plastic flap on the bottom back edge. Use the pictures as a reference. Make sure your grinding rotors are completely exposed. Test fit once done.

Get creative with your hoppers. I was originally going to print one but something of this size would take hours to design and print. I decided to go with an inverted conical hopper, to minimize the amount of plastic being spit out. I had a sheet of 3mm polypropylene lying around so I used it to cut the shapes.

Assemble like in the pictures and test fit for snugness. Blue painter's tape is what I had handy (thank you ABS printing). Make sure that both the long edges go around the steel rods and touch the lower plastic cover which we added back. Essentially make sure that the plastic bits flying around during operation don't make their way out of the grind chamber to the motor, gears and electronics.

Time to start putting things back together. Screw in the electronics and clean up the wiring like the pictures. Close up, put in the 6 original screws and mount on bin. Load the hopper. I had an extra piece of PP which I decided to use as a lid. We are almost done.

There is one and only one golden rule to this operation. Short slow pulses. If it sounds like the motor is being strained; stop and pulse in reverse once, flip back to forward and start pulsing again. I will eventually work on a hack to reduce motor speed drastically in order to eliminate pulsing all together. But for now, monitored pulsing has its advantages.

1st Grind Quality- The grind varies from dust to long strips and ribbons. This is characteristic of 3D printed parts as entire layers get delaminated. Keep in mind I have been running this continuously and ground up about 1kg of black ABS parts. The only breaks have been when the motor overheats.

2nd Grind Quality- Drastic improvement in consistency but some big chunks still remain. Easy to sort out by hand. Heat is starting to become a huge issue. Friction = heat. Not only does the motor overheat, the real big issue I am noticing is that the rotors have heated up. Also, the undercarriage has taken a bit of a beating, some of the rotor teeth are misaligned. Now the heat issue while not a big deal for plastics like ABS(high glass transition temp), might be a huge issue for PLA(low g-t). Cooling the motor is easy, its the rotors that have me concerned.

3rd Grind Quality- Ground the bigger pieces twice and smaller pieces once. Product is relatively consistent. At least to the point that the filabot extruder screw will spit out bigger chunks. Check out the pictures.

Total product 840gms. Assuming we began with 1kg, thats a yield of 0.84. I'm looking around and all the spillage barely amounts to 100gms. There is definitely a lot of debris in the shell. Most of the real damage seems limited to the plastic undercarriage shell that we left in place. Considering that most of the plastic on this machine is ABS and we ground up ABS, contamination isn't an issue.

1) Physical: The huge downside of this hack is that we are using a single set of rotors which imposes massive strain on the drive train. Also, the grinds need to be reground a couple of times to ensure semi-uniform consistency.

2) Heat is a monster. An immediate upgrade is a computer fan for the motor. Will post more later. The rotors need a bit more thought. Liquid cooling poses the risk of leaks. Fans will just generate dust and require filters which is a perpetual consumable and fire hazard. This is the plate and fin cooling problem from transport phenomena, but reversed.

Don't grind up huge batches at a go but rather grind as you go along and store for later use. My honest opinion is if you intend to grind about 1kg batches at a go, perhaps you need 2 - 3 of these machines running simultaneously. For an outlay of $150 for 3 machines producing 1kg a day and a profit margin of $5 per kg of product, the machines pay themselves off in 30 days. If you intend to go bigger, then you are in the recycling business and the $1000< beast is for you.

1) A small 3-stage plastic grinder comprising of 2 rotor top stage of about double the diameter of this shredder, 4 rotor 2nd stage like the one we are using, 8 rotor 3rd stage of half the diameter. In fact that gear ratio would be a great starting point with load sensitive speed control speed control rather than the "clicky" end-stop switch. There are some coffee grinders that use this concept.

Essentially we need a device transformation like from http://www.thingiverse.com/thing:902826 to http://www.ebay.com/itm/NEJE-1000mW-DIY-Laser-USB-.... Having built the first one, I decided to buy the second one.

If you are reading this, I'm assuming you either liked / thought about / want / intend to build or intend to contribute 'USEFULLY' to this idea. I will be posting upgrades and observations as I go along. If you have any suggestions / feedback / comments / build schematics / upgrades / mods or anything 'USEFUL' to contribute please message me. Use youtube comments as a benchmark for 'USEFULNESS".

In the process of making one of my own, I found a small 'cheat' of sorts. Because of how I cut the blade-guides (I took a dremel cutoff disk and dropped it between the blades, slicing the plastic spacer in half) I was able to keep part of the internal shield. As I am not shredding anything more than 15mm thick, I chose to only cut one side, so it forces the plastic into the other side, and I have had very little scatter into the housing even without a hopper guard.I find that running it at a 15% duty cycle is good enough for it to stay cool on the blades.

I'm quite interested in this project. Do you think a 2.2HP woodchipper could be used as the initial rotor assembly? I found one on Amazon for about $150, and I've heard of them being used to shred plastic. Issue with that is that the total cost comes to $200again, not inexpensive, particularly when coupled with a Recyclebot.

There are older shredders that can eat 3-ring binders! But, paper shredders are designed to shred paper. Maybe a "blender" could shred your plastics small enough to - then use a crosscut shredder. Your savings in; time, money, and electrical usage, will be reduced considerably. OR 3-4 shredders of varyin shred size & power, and reduce your plastic in "stages" vs burning up shredders.

Sorry, this project has been put on the backburner for a while but I will be posting big updates sometime in December. Just a quick update - I have successfully shredded most household plastics and produced fresh filament with quite decent print quality. PLA has been the only plastic with some issues because of its hardness. What really piques my curiosity is a powder extruder which eliminates the filament spool altogether. I have hated the filament and spool concept since my first 3D print over 5 years ago. Hopefully the DIY community starts work in earnest on a hybrid of the filament extruder and print hotend using ptfe tubing in bowden configuration to lighten the x-carriage and eliminate the ridiculous filament and spool.

Thanks for this instructable! I had no idea cross-cut shredders existed until I came across this instructable. I'very purchased a shredder and will work on transforming it in the next couple of weeks.great instructable!

Great plastics shredder! I've been doing some research into recycling plastics into 3D printer filament, but I haven't found a grinder that works for me. Could you do me a favor? If you could please run a clear, recyclable water bottle made of PET (#1 recycling symbol) and record it? I'd love to see the results, because this is probably better than freezing the plastics in Liquid Nitrogen :)

I have stripped the machine and looking into some immediate performance upgrades. The plan right after is to grind kitchen plastics like PP(tupperware, milk and juice jugs), PET(soda and water bottles) and others like pe, ldpe, hdpe. I have tried the liquid nitrogen technique and its a lot of fun but definitely not a smart idea at home. But its just so much fun. All the home plastics will definitely need to be washed, dried and cut into smaller chunks first. Smaller crushable pet bottles should be simple to grind. I'll post some updated videos shortly

wisconsin plastic products | material grinder job

wisconsin plastic products | material grinder job

Equal Opportunity Employment Wisconsin Plastic Products, Inc. is committed to a policy of equal opportunity for all employees. It is the company's policy to seek and employ the best qualified personnel in all positions to provide equal opportunity for advancement to all employees, including upgrading, promotion and training, and to administer these activities in a manner which will not discriminate against or give preference to any person because of race, color, religion, age, sex, national origin, handicap, ancestry, sexual orientation, marital status, arrest or conviction record, or any other discriminatory basis prohibited by state or federal law.

Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee for this job. Duties, responsibilities and activities may change at any time with or without notice.

Wisconsin Plastic Products, Inc. is committed to a policy of equal opportunity for all employees. It is the company's policy to seek and employ the best qualified personnel in all positions to provide equal opportunity for advancement to all employees, including upgrading, promotion and training, and to administer these activities in a manner which will not discriminate against or give preference to any person because of race, color, religion, age, sex, national origin, handicap, ancestry, sexual orientation, marital status, arrest or conviction record, or any other discriminatory basis prohibited by state or federal law.

MetaPlast technology is trademarked to Wisconsin Plastic Products, Inc. Patented MetaPlast LED enclosure to Wisconsin Plastic Products, Inc. Wisconsin Plastic Products, Inc. patent pending on raised round stair trend technology.

industrial grinders for rubber, plastics, trextiles and other materials

industrial grinders for rubber, plastics, trextiles and other materials

The premier equipment line of Jordan Reduction Solutions is our Hog Mill Industrial Grinders. No other grinder on the market has the versatility of application and ruggedness of design as do these reliable and dependable units. Many installations of these grinders are still in operation after over 50 years from original start up and continue to perform at an exceptional capacity. Suited for both wet and dry grinding applications, the JRS Hog Mill Grinder is the perfect choice when demands are somewhat complex in nature. These units continue to serve in applications from organics grinding, rubber grinding and even into ordinance and energetic material (explosive) applications.

With a unique feed system, the Jordan Reduction Solutions Rubber Grinder has been servicing the rubber industry for decades. Our specialized rubber bale feeder, located in the throat of the unit can take whole rubber bales and reduce them to as small 1/4 or below with out without a screen assist (material dependent). Additionally, the rubber bale design reduces the amount of recycle time in the chamber giving greater through-put with minimal horsepower requirements. These grinders also integrate either the ability for a fluid or dry powder partioning agent to enhance the grinding operation and help prevent agglomeration of the ground product.

Designed for high-speed and high-inertia operation, these industrial grinders can power through multiple materials with significantly lower required running horse power ratings yielding and higher production capacities at lower operational costs. Rotors are cast in carbon steel or stainless steel, depending on the application requirements and are a closed-rotor design which is ideal for reducing large heavy infeed materials down to a particle size of 1/8 to 3/8.

We stock a complete inventory of our OEM Hog Knives, knife clamps, and high-strength bolts. Additional replacements parts include throat bars, throat plates, and most screen. We also offer on-site or in-house service and maintenance on all JRS machine and installation of our replacement parts.Learn more about our Parts and Service Department.Please have your machine model number and serial number when calling or inquiring about replacement parts.

plastic scrap grinders, manufacturers of plastic crushers

plastic scrap grinders, manufacturers of plastic crushers

Contact manufacturers of plastic grinders for recycling of plastic rejections, runners, products and waste. On offer are plastic scrap grinders, grinders for plastic pipes, grinder for moulded plastic articles, ginders for films, yarns and plastic disposables, PET grinders, high speed plastic grinder and low noise grinders

Password must be between 4 and 15 characters long, and may consist of hyphen (-), underscores (_), dot (.), and asterix (*).

Password must be between 4 and 15 characters long, and may consist of hyphen (-), underscores (_), dot (.), and asterix (*).

used plastic grinders for sale. wanguo equipment & more | machinio

used plastic grinders for sale. wanguo equipment & more | machinio

TECHNICAL DATA 1. tainless steel pipe and cyclone 2. Water cooling, air cooling and fully automatic temperature control device are adopted for pipes, bearing seats and the body . 3. Vibrating screen is 30 mesh na...

Detailed Photos Plastic crusher refers to crushing all kinds of plastic plastics and rubber, such as plastic baskets, plastic films, plastic products, plastic products, mainly for the crushing of plastic waste ma...

Introduction Our paste grinder is high-efficiency processing machinery integrating the functions of crushing, cutting, grinding, and mixing. Food produced using this equipment can reach a particle size of 2~50 m...

Introduction Our paste grinder is high-efficiency processing machinery integrating the functions of crushing, cutting, grinding, and mixing. Food produced using this equipment can reach a particle size of 2~50 m...

Introduction Our paste grinder is high-efficiency processing machinery integrating the functions of crushing, cutting, grinding, and mixing. Food produced using this equipment can reach a particle size of 2~50 m...

Introduction Our paste grinder is high-efficiency processing machinery integrating the functions of crushing, cutting, grinding, and mixing. Food produced using this equipment can reach a particle size of 2~50 m...

Introduction Our paste grinder is high-efficiency processing machinery integrating the functions of crushing, cutting, grinding, and mixing. Food produced using this equipment can reach a particle size of 2~50 m...

Product Description Plastic Crusher Detailed Photos Product Parameters Model WG-300 WG-400 WG-500 WG-600 WG-800 Crushing caliber(mm) 310*200 410*235 515*290 610*320 815*470 Capacity kg/h 150-200 200-250 300-350 3...

SHR-series waste plastic recycling high speed mixer grinder Type Volume (L) EffectiveVolume (L) Mixing time(min/batch) Rotate speed(r/min) Motor(Kw) Capacity(kg/hour) SHR-5 5 3 6-8 1500 1.1 10 SHR-10 10 7 6-8 150...

Product Description The shredder can be used to tear up the hard to break plastic, rubber, large nylon material, rubber head material, auto parts, wood, circuit board, wood and other articles. The shredder is als...

magnetic plastic grinder 40 mm 3 pieces | wholesale grinders

magnetic plastic grinder 40 mm 3 pieces | wholesale grinders

Cool Magnetic Plastic Grinder. It probably is the cheapest herb grinder anyone can find in the market. Unit price can be down to $0.25/pc if order 480 pcs and more. You can not go wrong with this price.

This is a simple yet effective plastic weed grinder with a magnet to hold each side together. Metal ones are annoying and at home, people normally use a machine, but on the go or just grinding a single, this cheap weed grinder is just right.

grinder materials what you should and shouldn't use | stoner things

grinder materials what you should and shouldn't use | stoner things

If you already have a good glass piece or a quality bong or even a vaporizer the next best investment that you can make is a good grinder. Maybe you already have a quick-and-dirty plastic grinder that someone left behind, and you havent really given thought to purchasing a grinder. Are you aware of how much the material your grinder is made of will affectyour smoking experience?

A grinder will help you grind up your weed to a nice, finetexture. This is a tremendous time saver as compared to breaking up the weed and grinding it up with your fingers. You also achieve a much more consistent texture, which makes for an easy-to-roll joint that burns smoothly and evenly.

Your choice in a grinder should be dependent on many qualities, includingthe number of compartments and the grinder materials used. The material that the grinder is made out of will affect not only the durability of the unit, but the quality of the grind as well. A poor choice in material will eventually result in broken or dulled grinder teeth, which can severely impair its performance. Some of the more commonly used materials for grinders are:acrylic,wood and metal

Acrylic is the cheapest grinder material currently in use. Cheap and easily available, acrylic grinders are what most first-time grinder usersbuy. However, these types of grinders dont usually make a good choice, for many reasons. For starters, the teeth wont last very long and will eventually break off, reducing the grinders effectiveness. But even worse than impaired performance is the likelihood of acrylic particles ending up in your weed. Inhaling these burning particles can pose a serious health risk, so for this reason alone, acrylic grinders should probably be avoided.

When shopping for grinders, you may run across some models made of wood. Depending on the type of wood used and the construction of the unit, these grinders may be good quality, reliable units. Many wood grinders are carved out of a single piece of wood, which limits such models to single compartment varieties. This is usually sufficient for most purposes however, and the quality makes up for the reduced capacity.

The best material for grinder use by far is metal. Strong, durable, and dependable, metal grinders provide a smooth and even grind, and great performance for years and yearsif you choose the right type. Most experts agree that titanium grinders are the best, although you probably wont be coming across too many grinders with teeth made from pure titanium. Due to the cost of the metal, so-called titanium grinders usually have aluminum teeth coated with titanium. These models generally offer superb value for money.

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