Shredder for plastic. Twin shaft shredders. Why is a plastic shredder better than a crusher?

If except impeccable build quality and high performance, you are also interested in the affordable price, plastic shredder from Stankopolymer company- this is exactly what you need. Our company supplies equipment for polymer processing own production. To assemble our installations we use only high quality components, many of which, such as knives and augers, our company produces independently.

Wide choice is the key to consumer success

The company produces several models of shredders, each of which is designed to work with certain types of plastic raw materials:

• more suitable for processing thick waste single rotor shredder;
• better for recycling plastic bags buy a two-shaft shredder.

You will also find universal installations in our assortment.

We offer a wide variety of equipment on the market, including granulation and sorting lines for solid waste. Contact us if you need a plastic crusher or any other installation used in the processing of plastic, film and other types of polymer materials.

The shredder includes:

A plastic shredder is an installation for crushing plastics (it also shreds wood, tires, pipes, solid waste, etc.). Shredders for plastics are manufactured with a noticeable reserve of strength and wear resistance. Thanks to its design, it can work with raw materials of pre-designated dimensions.

• loading compartment (window);
• rotating rotor with knives;
• sieve (set depending on the task assigned by the client).

Plastic of any strength is processed until it is sifted through a sieve placed under the rotor. There are also other shredder models that have multiple rotors.

The knives located on the rotor have four very sharp blades (after use, the knife is turned over with a different edge and fixed again, due to this the service life of the knife increases).

Installation selection

A characteristic worth paying attention to will help you choose the right shredder for shredding plastic:

• engine power;
• speed of circular motion of the rotor (measured in the number of revolutions per minute);
• loading window size;
• width and type of knife.

The above determines what types and dimensions of plastic the shredder will be able to crush.

Types of plastic shredding plant

There are the following types of shredder:

• single-rotor, which shreds large-sized waste of various shapes from plastic, rubber, wood;
• the double-rotor, unlike the single-rotor, shreds thick-walled waste (thick-walled plastic pipes, car tires) of the same shape.

Plastic shredding equipment must be installed on a perfectly flat surface, otherwise proper operation will be impaired. Any unevenness on the surface leads to vibration of the equipment, which will negatively affect its performance. In addition, our company offers plastic compactors at affordable prices.

You can buy a shredder for plastic on the website of the Stankopolymer company, where they provide the best installations of various models that satisfy any needs of industrial enterprises that process plastic.

You can also buy a plastic shredder, the price of which will satisfy every customer, by calling the phone number listed on the website.

Most polymer materials are chemically inert and not biodegradable.

There is also, but its share in world production is very small.

The durability of polymers also has a downside - waste, including industrial waste, must be disposed of.

Landfilling or burning plastics causes irreparable harm to the environment. Therefore, polymer manufacturers and solid waste disposal enterprises are mastering recycling.

This is a set of activities, the diagram of which as follows:

• waste collection and sorting;
• processing into secondary raw materials;
• production of final products.

In this article we will talk about plastic shredders.

Polymer processing is impossible without shredders and crushers. They are used for grinding, that is, obtaining pieces of a given size.

Fraction size– one of the key technical parameters of the equipment, and it determines how costly the next stage of processing – granulation – will be.

In some industries, technology allows for the mixing of plastic chips into the feedstock. Here, the uniformity of grinding, the absence of dust and too large pieces plays an even more important role.

Types of shredders and crushers

Manufacturers and equipment suppliers are often faced with a client’s request to select a universal shredder or crusher that will work with all types of plastics and produce almost finished granulate.

This task is practically impossible, since polymer materials differ in a number of parameters:

• physical and mechanical properties - strength, impact strength, friction coefficient, softening temperature;
• structure - they are solid, fibrous, cellular, composite;
• shape and dimensions.

In addition, consumers do not always understand the purpose and operating principle of the equipment. To avoid confusion, we note that both machines stand next to each other in a complete production line: the shredder performs the primary grinding of waste, and the crusher does the secondary. Their designs may be the same.

The division into two stages is carried out to optimize production. For example, grinding a thick-walled 200-liter barrel to the required size will require either a high-power drive or a high time investment.

Two-stage crushing allows reduce energy costs And increase processing speed.

Some manufacturers make machines that combine a shredder and a crusher. For example, the international group of companies TRIA has developed a series of combines for processing large blocks and thick-walled blow moldings. However, they are not suitable for working with small-sized waste - , -.

Crushing equipment differs in design, operating principle and type of material being processed.

Processed materials and methods of exposure

All recyclable materials can be divided into three types:

1. Film— polypropylene, acrylic, polyethylene and PVC films are highly elastic. To grind them, you need cutting or tearing installations.
2. Small and thin-walled— these include PET containers, small canisters for fuels and lubricants, and plastic pipes. Shredders should be equipped with stronger blades or teeth.
3. Large and thick-walled— sprues, profiles and molding defects are crushed by impact, squeezing or abrasion.

The dimensions of the loading window, hopper, filling system, actuator and profiling sieve depend on the dimensions of the waste. Feeding can be done manually, using a conveyor belt or a lifting machine.

Some types of machines are integrated into the production lines of enterprises, others are installed separately.

There are a number of solutions on a trailed chassis, such shredders delivered to the temporary work site. Many manufacturers offer their customers modular designs with a set of options that allow the same mechanisms to be used in different conditions.

Operating principles of shredders

There are three types of shredders depending on the principle of operation:

• shock action;
• compressive;
• cutting and tearing.

Impact shredders, or hammer crushers, are often used in mining and processing plants, are also used to destroy polymers.

They fit for working with gates and large waste made of fragile plastics. The advantages of such machines include high productivity and the ability to work with hard-to-grind materials.

However, they have significant flaws:

• large mass of the frame— some models can only be installed on a prepared reinforced concrete base;
• high rotation speed in combination with hinged hammers make the mechanism a source of noise and vibration.

Compression devices—jaw and cone crushers—are designed for grinding the largest wastes. However, they are not able to cope with viscous polymers such as ABS plastic or polyurethane.

The machines are equipped with a powerful drive; electric motors and hydraulic cylinders are used as power units.

Cutting and breaking shredders, or rotary shredders, are equipped with knives and teeth. They are suitable for grinding most types of polymer waste. Among the manufacturers' offers models for industrial use can be found, medium and small businesses.

Common designs

Shredders for plastics are made according to three different kinematic schemes. They are:

1. Single-shaft. The rotor rotates in a working chamber, or stator. The raw material is fed through the loading window, and the crushed material, under its own weight, exits through the profiling sieve. There are also machines with forced pneumatic unloading. One of the main elements of a single-shaft shredder for medium and large waste is a hydraulic press plate. It presses pieces of plastic against the rotor and ensures that they are captured by teeth or knives. Single-shaft designs are suitable for primary grinding of high-hardness polymers.
2. Twin-shaft. Systems with two rotors have a higher degree of grinding. On the loading side, the shafts rotate towards each other. The gripping conditions in a two-rotor machine make it possible to do without a pre-presser. High torque allows you to process waste from soft elastic plastics, elastomers, and rubber goods.
3. Four-shaft. The system includes two main (cutting) and two auxiliary (feed) shafts. Such machines are designed for crushing large-sized waste, including hollow waste: cans, barrels, cans. The knives of the feed rotors are spaced apart, but have a positive overlap with the knives of the working shafts, and therefore also participate in the grinding process.

The largest demand for plastic recycling use rotary shredders and crushers.

They achieve the required crushing depth with high productivity, are easy to operate and do not require high maintenance costs.

Grinding is performed with knives attached to the rotor and stator. For light and thin plastics, machines with a high rotation speed are used, for solid and large waste - with a low one.

Depending on the type of plastic, knives of the following designs are used:

• disk;
• straight;
• oblique;
• V-shaped;
• cascading.

Highly specialized machines

The largest share of waste in the production of polymer film comes from the edges. To crush it and remove it from the work area specialized installations have been developed.

Venti Oelde produces a range of industrial burst fans. There are no counterknives in their design, and the edges of the blades have a sawtooth shape. Fine teeth grab the edge and pull it until it breaks, and the crushed waste is directed by air flow into the receiving hopper.

Shredding of polyethylene films and extruded polystyrene foam is accompanied by heating of the material itself and the knives.

To avoid material sticking, crushers are equipped with water cooling systems. However, some manufacturers self-heating is used to obtain agglomerate– the processing stage following grinding.

They are high-speed (≥1200 min -1) crushers that produce dense balls with a diameter of 3 – 15 mm. If the initial raw material did not contain impurities, the agglomerate is sent for reuse without additional processing.

Equipment performance: industrial and mini

You need to choose a plastic shredder for specific tasks taking into account its performance.

Using the example of the ATLASMASH LLC family of shredders, it can be seen that the spread of this parameter is 50 – 3500 kg per hour.

The consumers of such installations are enterprises not involved in recycling.

The WS line is a medium-performance model designed for commercial use. WN are industrial shredders designed for high load levels.

It is also worth paying attention to machine drive power. The most productive models consume up to 160 kW/h electricity.

Plastic shredder prices

Approximate prices for polymer shredders from various companies are presented in the table:

Most manufacturers of shredders and crushers for plastic do not lay out prices for their equipment, but make a commercial offer at the request of the client after studying all his needs.

For example, installing a cooling system or a cyclone filter can lead to a significant increase in the cost of equipment.

A decision on the advisability of purchasing a shredder or crusher should be made only after calculations and consultations with an economist and the manufacturer.

Sometimes a mini crusher will be enough. In cases where the amount of polymer waste does not reach 1 ton per year, the optimal solution would be take mobile shredder for rent or enter into a collection agreement, removal and disposal with a specialized company.

Results

Crusher and shredder are indispensable devices in plastic processing. The right shredder will give you a good start and make it as cost-effective as possible.

In contact with

Buying a plastic shredder is profitable and without headaches. Assembly, delivery, commissioning

For polymer processing, we suggest you familiarize yourself with single-rotor and double-rotor shredders. High-quality equipment from a good manufacturer is what everyone needs. And we will help you choose a plastic shredder, buy it and start using it.

• Why is a plastic shredder better than a crusher?

  The shredder works more efficiently, and most importantly, with less waste - it does not make much noise and does not leave dust behind. In addition, the size of the pieces of plastic can be completely different - the shredder can handle everything. The plastic shredder is very resistant to any type of damage - the knives and other parts do not wear out for a very long time.

• Shredder Types

  Shredders for plastic can be completely different - depending on the amount of material that is collected in your production, you can choose a shredder based on size and technical characteristics. The fraction on the output hole is marked with productivity - for example, 50 mm, but the size of the hole can be changed depending on your wishes and needs. In addition, our company offers film shredders.

Positive traits

Buy a shredder, which processes plastic without additional costs, from us, and you will receive the following device:

• With minimal noise;
• Compact and convenient design;
• Ease of operation;
• High-quality and reliable knives on the rotor;
• Economical costs – minimum electricity consumption and machine maintenance;
• The design of the working chamber is suitable for processing plastics of large and small sizes.
• Highly efficient performance;
• Good price and availability of all models and spare parts of interest in our warehouse in Moscow;
• The shredder can be configured for more convenient use, as well as depending on the operating conditions that are optimized in your production.

Processing polymers is not such a complicated technological process if you have the space, specialists and a plastic shredder. Thanks to the correct adherence to the technological process, in a minimum amount of time, you can clean up a large pile of garbage and obtain a new product necessary for the production of plastic goods.

• Where is a plastic shredder used?

  The main customers of the solid waste shredder are small and large enterprises specializing in the manufacture of plastic products, companies that collect waste for the purpose of subsequent disposal, and enterprises whose activities are related to the production of plastic products.

  The process of processing used plastic and rejecting it using high-quality equipment guarantees the following advantages:

  • high productivity of granules of a certain size and shape;
  • reducing the cost of the resulting product;
  • increasing the number of sales;
  • saving costs on purchasing parts;
  • quick profit generation;
  • achieving financial independence.

  To realize your dream and develop your plastic recycling business, all that’s left is to buy a plastic shredder. We invite you to learn more about how to find us and what you need to do this.

• How to choose a shredder for LDPE?

  Choosing a high quality product is easy. To do this, you can get advice from our specialist or fill out an online application on the company’s official website. By specifying contact information and equipment requirements, managers will select a unit of the required quality in the shortest possible time. There are several types of shredders on the market. Knowing the final purpose of the installation and the preliminary loading parameters, our specialists will never make mistakes.

They have firmly entered modern life, and there is not a single industry where they are not used, from the production of containers to space technologies. Every year about 180 million tons of various plastics are produced on the planet. Most of them cannot decompose on their own into simple components and be disposed of independently.

This causes irreparable damage to nature and can cause an environmental disaster. A positive feature of almost any polymer (plastic) is the possibility that old plastic things can get a “new life” as useful items. Recycled plastic is slightly inferior in strength characteristics to primary polymer, but at certain proportions, products made from recycled plastic are practically no different from the original one.

Types of shredders

Before recycling can be produced, any plastic must be shredded. There are special devices for this - crushers. Depending on the physical properties of the polymer placed in them, devices can be classified into several categories:

• for shredding PVC film, nylon or acrylic. The design resembles large scissors with “V”-shaped blades;
• for large plastic waste. Most often used in recycling plants or plastics factories. They come in hammer, jaw or cone designs. With their help, window profiles and large parts and housings are crushed;
• for PET bottles and thin-walled plastics. The most common version of the chopper is structurally called rotary.

You can purchase the required type of device or make it yourself. We are talking about a small household appliance from the third category. Making a plastic crusher with your own hands is quite easy and does not require serious knowledge or specialized tools, except for a welding machine.

Learn more about the rotary shredder

The most common design is the impact crusher. It consists of a rotor on which the knives are fixedly mounted. Under the influence of the driving force - from a diesel, gasoline engine or electric motor, the axis with knives begins to move and with quick blows crushes the raw materials that have fallen under the knives. Depending on the purpose, there are low-speed machines and high-speed units.

A sieve or grid with a certain mesh size is installed at the bottom of the working chamber, depending on the required quality and diameter of the resulting fraction. The raw materials are processed cyclically with knives and gradually pass through a sieve.

Particular attention is paid to the quality of the metal from which the knives are made - it should be good hardened steel, which prevents rapid wear and ensures that the sharpness is maintained for a long time.

We make the crusher ourselves

There are several most popular types of shredders that are made at home. In order to assemble this device with your own hands you will need a little patience and minimal skills. All you need as a special tool is a welding machine or a household inverter.

A do-it-yourself plastic crusher, the design of which will differ slightly depending on the level of skill of the manufacturer and his imagination, has the following common elements:

• drive unit. The most commonly used is an electric motor. Thanks to the large selection and affordable prices, you can choose the model of the required power. In addition, the electric drive crusher is quieter and can be used both outdoors and indoors;
• circular saws. This will be the basis of our apparatus. It is necessary to select a sufficient number of them and different configurations of teeth for better grinding of waste. The optimal number of saws on the axis is about 20;
• the axis on which the saws will be mounted;
• metal profile or pipe for making the support frame and frame of the crusher;
• protective cover and feed hopper. You can make them yourself at home from galvanized sheets using metal shears, a hammer and a vice;
• a pulley, two bearings and a special belt, which creates interaction between the electric motor and the rotor;
• fasteners (nuts, washers and metal screws).

When all the necessary materials and tools are prepared, you can begin manufacturing the unit.

First of all, you need to build a cutting unit. To do this, we put circular saws on the prepared axis. The diameter of the axis and the seat of the saw must match. There should be a minimum distance between improvised knives, which is provided by ordinary metal washers. The ends of the saw blades should be well secured with nuts. Then we install the axle on the pulley and use two bearings so that the structure rotates freely.

The next step is making the supporting frame. We make a rectangular frame from a metal corner, profile or pipe by welding. Then we weld the legs of the required height to it. Cover the frame with a sheet of metal, which we weld to the frame. We cut a hole in the sheet equal to the size of the cutting block. We mount the engine at a short distance from the knives.

After the frame is ready, we can begin the final stage of assembling our device. To do this, we put a protective cover on the knives and install a hopper on top for supplying raw materials. It is necessary to provide a hole in the casing through which the axle will be connected to the pulley. Using a special belt, we connect the motor shaft and the cutting unit. Our simplest plastic crusher design is ready.

People who have extensive experience in making all kinds of units with their own hands recommend first of all drawing up a drawing of the future design. In this way, you can avoid size mismatches or missing some components or parts.

Before purchasing an engine, you should decide on its power and output speed. For infrequent use and low loads, a compact low-power electric motor is sufficient. The more actively the crusher is used, the more powerful and “speedy” the motor should be.

It is better to choose light alloy circular saws. They are somewhat more expensive than standard products, but they retain their sharpness much better, which will save you from regularly and frequently removing the cutting unit to sharpen saws. The design itself should be thought out in such a way that you can easily reach any of its nodes.

For greater convenience, you can make a special container where the processed raw materials will be stored. The container is attached directly under the saw blades of the crusher. If you need to receive recycled plastic of various sizes, you should take care to manufacture and install a special grid or grid under the disks with the desired mesh size.

Small conclusions

A plastic crusher is a tool that will not only help fight environmental pollution, but will also bring some income to the owner. Shredded plastic can be taken by weight to recycling centers and earn some money. In addition, depending on the design of the cutting unit and the power of the motor, the device can be used to chop leaves and branches - and this is a serious help to any summer resident or owner of a private house.

Assembling the unit is not particularly difficult, and thanks to your own developments, you can improve the design. Self-assembled crusher will not differ at all from commercially produced shredders for household needs, and in terms of reliability it will surpass cheap Chinese analogues. One of the options for what a plastic crusher can be is a video plot attached.