Features and selection of hydraulic waste paper presses

The work of the overwhelming majority of modern enterprises is associated with the formation and accumulation of various types of waste. In particular, we are talking about paper and cardboard, that is, used packaging materials, unnecessary documents and more. Taking into account the low density of paper products, the storage of such waste requires rather large areas. In such situations, the most rational solution would be to use hydraulic presses for waste paper. Knowing the peculiarities of the choice and operation of such equipment, it is possible to reduce the volume of the materials under consideration by tens of times and, therefore, significantly save the occupied warehouse space.

At its core, any hydraulically driven waste paper press is a machine whose main task is to compact paper and cardboard as efficiently as possible. At the same time, many models have the function of packing compressed waste into bales or briquettes, which in itself greatly simplifies storage and transportation. It is worth noting that the technique in question is universal, since it is successfully used for processing not only paper waste. With sufficient power and compression force, it is also about wood, plastic and (in some cases) even metal.

As proven by many years of practice, even taking into account rather large dimensions, the best option are machines with a hydraulic drive. The list of structural elements of such devices includes:

• closed frame frame made of welded steel sheets;
• working (power) cylinder - is located, as a rule, on the upper cross member;
• piston plunger;
• rack guides forming a regular (isosceles) prism in section;
• pump;
• traverse with a smooth striker;
• working (loading) chamber;
• ejection mechanism;
• control system.

One of the main features of waste paper hydraulic presses is the absence of return cylinders. The fact is that a very large force is not required to seal the materials described. The system of functioning of such presses is designed so that the working fluid is in the lower part of the cylinder, and when the direction of pumping is reversed, it moves up.

Among other things, it is important to note that the traverse always has an exact direction. In this case, the guides can be adjusted at any time using special adjusting bolts. The compression force during the pressing process is controlled by a pressure gauge, which is adjusted based on the readings of the pressure sensors. Taking into account the volume of the container loading, that is, the compacted paper bale, the pressure at the final stage of the traverse stroke can reach 10 atm, and the minimum indicator is 2.5 atm. Otherwise, the density of the future packaging will be insufficient.

The finished package after pressing is pushed out by the above-mentioned mechanism. The latter can have both manual and automated control. The second option provides for the independent activation of the unit after the traverse reaches the upper position.

Given this value, important points can be highlighted.

1. The simplest press models are capable of creating operating pressures ranging from 4 to 10 tons.As a result, such machines can only handle light materials.
2. Samples of equipment belonging to the category average in terms of power produce from 10 to 15 tons. Such modifications are already being used for processing not only paper raw materials, but also thermoplastics.
3. Professional (industrial) units create a force of up to 30 tons. Such presses are capable of working with sheet metal products.

The equipment models presented today in the relevant market segment are classified according to several key characteristics. Depending on the size, performance and principle of operation, there are the following settings:

• compact, characterized by a relatively low weight;

• mobile;

• medium in size and weight;

• heavy (often multi-ton) industrial applications.

Depending on the place of use, the volume of work performed and, of course, the size of the pressing machines can be divided into mobile plants and stationary ones. The latter are characterized by maximum power and are installed, as a rule, in enterprises specializing in the reception and processing of recyclable materials.

The key distinguishing features of these presses are:

• permanent location;
• large dimensions;
• increased productivity;
• multifunctionality and maximum equipment.

Mobile models are characterized by small size and weight, as well as the corresponding power and performance. Such units are used by enterprises and organizations whose activities are associated with the formation of a large amount of paper waste. We can also talk about companies involved in the disposal of recyclable materials.

The current waste paper presses (taking into account their main technical characteristics) can be divided into:

• mechanical;
• hydraulic;
• hydromechanical;
• baling.

As already noted, the most efficient are hydraulic installations. Despite the fact that they are significantly larger and heavier than their mechanical "counterparts", hydraulic presses are in great demand. Their main structural elements are the pumping unit, ejection mechanism and control system. In this case, the working part includes hydraulic cylinders and guides (sliders). Such devices in the context of work management can be:

• manual;
• semi-automatic;
• fully automated.

Hydromechanical machines are equipped with a hydraulic circuit with a working cylinder, which is paired with a lever assembly. In this case, the main distinguishing feature is the decrease in the speed of the plate movement in parallel with the repeated effort at the final stage of the pressing cycle.

A separate category is made up of baling models. Based on the name, it can be understood that their feature lies in the function of tying compacted bales of paper and cardboard. Such machines are most often found in large enterprises and warehouses.

Regardless of the parameters already listed, the described equipment is divided into two large groups, taking into account the method of loading raw materials, which is vertical, horizontal and even angular. The overwhelming majority of small and medium-sized waste paper presses are vertical units. More powerful and functional stationary modifications of hydraulic machines have a horizontal layout.

Horizontal loading units offered by leading manufacturers are usually quite compact machines. They are conveniently located even in relatively small rooms. At the same time, such presses easily cope with the processing of waste from small enterprises, retail outlets and organizations. And the key performance characteristics of the equipment in this case are as follows:

• compression - about 2 tons;
• productivity - up to 90 kg / h;
• connection to the electrical network - 220 V (one phase);
• working temperature - from -25 to +40 degrees;
• occupied area - approximately 4 sq. m (2x2 m);
• loading chamber window - 0.5x0.5 m at a height of 1 m;
• dimensions of the bale after processing by the press - 0.4x0.5x0.35;
• bale weight is in the range of 10–20 kg.

Horizontally oriented hydraulic models (top loading) for compaction of paper and other types of waste - these are versatile and high-performance presses with the following characteristics:

• the average compression force is 6 tons;
• productivity - from 3 to 6 bales per hour;
• operating temperature fluctuations - from -25 to +40 degrees;
• loading window - depends on the overall dimensions of the machine;
• bale weight - from 10 kg.

Due to their high power, machines belonging to this category can handle large volumes of heavier materials. This refers to plastics, as well as rolled ferrous and non-ferrous metals up to 1.5 mm thick. One person can also perform work here, but loading mechanisms are used to simplify and speed up the process.

Taking into account this parameter, all models of pressing machines available on the market for the described types of recyclable materials can be divided into three categories.

• Mini-presses, installation and operation of which does not require rigid fixation on the surface. As a result, one of the key advantages is the mobility of the equipment. Another distinctive feature is the maximum ease of operation: one person can easily handle the unit. Moreover, the presence of special training is not required. It is important to take into account that, due to the relatively low compression force in compact presses, the volume of the raw material is reduced by approximately three times. These models will be the optimal solution for households, offices and small warehouses and retail outlets.

• Standard grade equipment, which is widely used in large warehouses, factories, as well as points of reception and processing of paper recyclable materials. It is important to take into account that such machines must be rigidly fixed on a horizontal surface. The power of the machines allows to reduce the volume of waste paper and other materials by about 5 times.

• Large-sized professional equipment used by printing companies, as well as other enterprises whose activities are associated with large flows of paper waste of various classes. Such hydraulic installations - due to their characteristics - are capable of compacting waste, reducing their volume by a factor of 10 or more. Installation, operation and maintenance of such machines must only be carried out by qualified personnel.

At the moment, a fairly wide selection of hydraulic presses in question offers plant "Gidropress"located in Arzamas. Representatives of the model range of this domestic manufacturer are equipped with high quality and reliable French automatics. In addition, it is worth highlighting the automated systems for loading raw materials and unloading pressed bales. An equally important point is the possibility of full-fledged operation of machines at negative temperatures.

The family of vertical presses of this brand is now presented on the market in the following modifications:

• small waste paper hydraulic presses - up to 200 kg of compacted raw materials with a force of up to 160 kN;
• middle class machines - processing up to 350 kg of waste with a pressing force of up to 350 kN;
• large models - the weight of the baled bale of paper and cardboard is up to 600 kg with a force of up to 520 kN.

The product range of the plant allows satisfying the needs of all potential customers, regardless of their needs, production scale and financial capabilities. At the same time, the list of advantages includes the optimal price-performance ratio of hydraulic pressing plants.

Another major manufacturer is plant "Statico", which has been producing vertical and horizontal presses for 25 years. In addition to machines for processing solid waste and industrial waste, the company's model range includes a range of machines for compacting waste paper, plastic and sheet metal.

Key benefits include the following important points:

• warranty for press bodies and hydraulics for 2 years and 1 year, respectively;
• high quality materials used in the production, in particular, we are talking about the strength, reliability and durability of the bodies of the pressing units;
• equipping production lines with German equipment;
• creation of a reliable and resistant to external influences coating;
• use of PST Group technology;
• high-quality service and prompt delivery throughout the territory of the Russian Federation.

Barinel from St. Petersburg specializes in the development and production of high quality presses that meet all current standards. The model range of the brand includes baling machines for processing paper, cardboard, polyethylene, plastic (BRLTM series models) and other types of waste. Based on customer feedback, Barinel equipment can reduce storage and transport costs for recyclable materials.

Speaking about foreign manufacturers, it is worth focusing on products Swedish company Orwak... We are talking about one of the indisputable leaders of the industry, whose history began back in 1971. It was then that the first patented press model 5030 was developed and released, which was presented at exhibitions in Paris and London. After just two years, the brand has already entered the international market.

To date, a whole network of official representations of the company is successfully operating all over the world. As a result, the manufacturer quickly responds to any requests from a potential consumer.

Given a fairly wide range of waste paper presses on the market, you can choose the most suitable option taking into account key criteria. First of all, it is necessary to determine the potential volumes of recycled waste, and, consequently, the loads. The most important points are:

• density of pressed materials;
• unit performance;
• the power of the hydraulic drive itself;
• compression force (pressing);
• Energy consumption;
• the size of the equipment and its mobility.

In addition to all of the above, it is also recommended to pay attention to the equipment manufacturer. Of course, the financial side of the issue will play an important role for many potential buyers.