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Plastic recycling is a well-established industry that globally

processes and resells several million tons of used plastic material

each year. Rather than operating merely out of environmental

necessity, plastic material recovery services can be both cost-

efficient and productive, saving resources for a range of different

manufacturing applications. The recycling and reclamation field also

encompasses the industrial processes by which plastic materials are

separated into their base monomers and made available for further

polymerization at secondary and tertiary levels.


While the plastic recycling industry was originally focused on

recovering manufacturing scraps and byproducts left over from initial

plastic fabrication, present-day recycling services are capable of

reclaiming heterogeneous post-consumer goods as well. The methods

employed by material recovery systems tend to vary according to the

type of plastic being processed, but there are some essential

practices common to most recycling services. Stages such as sorting,

cleaning, size reduction, separation, and pelletizing can be found in

most plastic recycling operations. Likewise, the machinery used to

achieve these processes generally falls into a handful of equipment

categories called Plastics Recycling Machine.


Plastic Recycling Sorting Process and Equipment
Sorting and grouping plastic materials according to resin type is an

important first step in the recycling process because contamination

can render a batch of material un-reusable. The most frequently

recycled resins, including polyethylene terephthalate (PET), high-

density polyethylene (HDPE), and polyvinyl chloride (PVC), must be

carefully separated from one another in order to enable further

processing. Contaminants within each type of plastic must also be

removed from the base resin to ensure stock purity.


Sorting machines must rapidly identify and categorize large volumes of

post-consumer plastic, often under continuous input. Although there

are varying degrees of technical sophistication and capacity, an

advanced sorting machine can be equipped with some or all of the

following features:


Sensors: These devices detect specific polymers within a mixed stream

of plastic materials. They can be equipped with x-ray or infrared

sensing that registers a polymer's unique signature along the

spectrum. Some sensors also incorporate color detection technology

that sorts material according to tint and transparency.



Ejectors: Mechanical or precision air ejection units physically group

different plastic materials according to resin types. Depending on

their capacity, ejectors can often handle very high rates of input.


Computing Systems: Computer processing technology supplies the

algorithms that are used to identify and sort different materials.

These systems provide the controlling parameters for both sensor and

ejector operations.


User Interfaces: An operator's interface can provide machine

controls and diagnostic tools for technicians. In addition, interfaces

can also offer networking abilities to help integrate a sorting

machine and make rapid adjustments to its functions.


Size Reduction Machines
Plastic materials usually need to be cut into smaller sizes in order

to allow further processing and to provide easier packaging,

transportation, and distribution of recycled stock. This cutting

presents certain challenges, as many plastics are abrasive to metal

blades and can have wide variation in their hardness, weight, and

thickness. Most standard size reduction is performed by single or

multi-shaft shredders, and granulators. Multi-shaft shredders perform

scissor-like cutting with a series of rotating blades that can handle

moderately dirty or contaminated material, but are somewhat imprecise

in the size of the cuts. Single shaft shredders perform more of a

tearing motion, and have slower motors that lengthen blade lifespan.

They can also handle dirty or abrasive material and usually have

adjustable or replaceable blades.


Granulators are composed of a rotor attached to blades that rotate

within a chamber containing a grid floor. Their capacity for

processing plastic material depends on the speed of the rotor, angle

of the cutting blades, spacing of the grid, and the shape of the

rotor. Granulators are usually sturdy machines, capable of relatively

rapid cutting rates, and the presence of the grid allows for more

precise control over the size of cuts. Granulator blades typically

need to be replaced regularly over the course of operations.

Washing Equipment
After the plastic has been cut into smaller pieces, or

"flakes," the stock usually needs to be washed in order to

remove lingering dirt or attachments. Paper, glue, sand, and grit are

some of the common elements targeted in the washing process, which can

be accomplished using water baths, friction washers, or a washing

line. The washing line applies a continuous hot spray over a stream of

plastic material, removing some or all of the labels and dirt attached

to the plastic surface. Detergents and disinfecting agents are often

included in this process to improve the level of cleaning.


There are a variety of other Recycling Machine used more and more in

the modern industry such as Copper Wire Recycling Machine,

Motor

Rotor Recycling Machine
and

Radiator

Recycling Machine
. Without doubt, they must require the

cooperation with many Other Accessories like

Cable Stripper

and Cable Shredder

.

  • Created: 06-01-22
  • Last Login: 06-01-22

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