The edgebander does not glue at the beginning. Edge banding machine: purpose, principle of operation of the equipment

With the help of edge banding equipment, the material can be glued to the edges of the workpieces using a special adhesive. Without this unit, not a single woodworking enterprise will be able to work. Manufacturers from all over the world can offer a different range of these machines. The design of this device is not complicated at all, so you can make a portable edge bander yourself.

Purpose of the edge banding machine

The first edge bander was invented a very long time ago, to be precise - in five years it will be half a century since the introduction of a continuous edge banding machine using hot melt adhesive. Currently this equipment is the basis of production at furniture factories. There are many manufacturers of these machines from Germany, Italy, Austria, Czech Republic, Spain, Japan, Turkey and China.

Edge banding is the process of gluing a banding material onto the edge to provide a beautiful appearance products. This method is widely used in the production of furniture, where the narrow edges of slabs or panel parts are to be beautifully finished. Today there is a huge choice of patterns and shades, which forces designers to develop new edgebanders.

As a material, you can use paper, veneer, melamine, ABC, PVC, the thickness of which is 0.4 - 3 millimeters, and the width is 2 - 6 centimeters. The basis of the technology is the system "blank - adhesive mixture - glued material". Thanks to a special compression and transformation, the cladding is securely fastened to the edge.

Many edge banders rely on hot melt adhesive, which melts when heated and solidifies quickly when cooled. This technology requires strict adjustment of the temperature regime and pressing of the glued components with the help of a set force. If you do not think about it, the system may lose stability, and the cladding may fall off.

Edge banding machine design

A table made of textolite or similar material is placed on the bed, which does not allow damage to the workpiece. A base module is mounted on the table, behind which a milling module can be placed to eliminate overhangs. The advantage of such equipment is its mobility, since the dimensions allow you to move the machine to the location of the part. There are also interchangeable guides, as in the photo of edge banders on our website, to work with hard strip facing.

The feeding system includes roll, guillotine and rollers. To begin with, a lining material is installed in the store, from which the tape is pulled by rollers into the gluing area. To adjust the belt feed speed, the roller drive must have an adjustable speed. The guillotine cuts the tape so that it is long enough to cover the entire edge and 25 millimeters for the allowance. The guillotine drive can be mechanical or pneumatic. Using a workpiece position sensor, the moment of operation of the guillotine is determined.

The machine is often equipped with a system for heating and applying glue. This is done in two different versions - so that the edging material is supplied with and without a layer of glue. In the first option, the adhesive is already contained on the tape, but it is heated with hot air using an industrial hair dryer. In the second case, the glue is heated in a special bath and applied to the surface of the tape using a drive roller. It is worth noting that some models have two rollers, of which the second is designed to apply adhesive to the edge of the workpiece.

The next element is the glue bath, where the glue for the edgebander is heated to a temperature of 150-200 degrees Celsius, does not stick, has a uniform consistency and circulates well. Teflon-coated baths and temperature sensors are predominantly used. Some models have a special cartridge for applying glue to the surface.

The clamping system has the form of a support roller. When the tape comes into contact with the facing material, there is a certain compressive force on these components. If the edgebander has a motorized feed, the tape is pressed against the edge of the part by one or more rollers that are arranged in series. In equipment with a manual part feed, this function can be performed by a person who feeds the part and at the same time presses it against the outgoing tape.

One or two or three rollers are used as a support. But this method requires good skills. In addition to the uniform mode, the feed speed of the workpiece and the tape is constantly adjusted to avoid tearing or bunching of the tape. More sophisticated equipment allows you to control the machine automatically, using electronics.

For gluing, a tape is used, the width of which is 2-5 millimeters greater than the height of the part. This is done to ensure that the edge is closed. As a rule, after gluing, so-called overhangs remain, which protrude from both sides. To remove them, a milling module is used, which cuts off all the facing that extends beyond the part.

Usually the tool is endowed with a high-speed drive with 10-12 thousand revolutions per minute to leave the surface unharmed. The module also provides limiting rollers for competent installation of the workpiece. The module is endowed with two cutters with individual drives, it is adjusted to the desired height of the part. To fine-tune the module and fix it, a movement mechanism with a special “screw-nut” gear is activated.

After cutting with a guillotine, the tape with an allowance is glued to the edge. To remove it, you must use a trimming module, the design of which can be very different. The simplest option is a circular saw, which is endowed with vertical movement and equipped with a low power drive.

On a special command, this saw enters the working area of ​​the edging machine and saws off the excess part of the cladding. This principle can only work on machines with a manual feed of the part. If the feed is mechanized, the end module is more complex. The powered saw is mounted according to the instructions of the edge bander on a carriage that has two short strokes: the first to feed the saw to eliminate the tape allowance, and the second to evenly feed the workpiece and saw.

The edgebander can be supplemented with many functional details that affect its productivity, automate some processes, and also prepare and bring the edge to perfection. Modules can be sharpened specific size, type of facing material or type of workpiece. Reliable design provides high-quality pasting of straight and radius furniture blanks.

Working principle of edge banding machine

Edge banding devices with manual feed are used not only at home or in craft workshops. Even large furniture companies have this device for quick repair and veneering of exclusive or curved blanks, small batches of parts.

Due to the presence of processors, controllers and control systems, devices with manual part feed are very convenient and easy to prepare and manage. The main processes during operation are the feed rate, automatic temperature control, and the length of the pasted material.

The manual feed edgebander works with material up to 3 millimeters, consumes approximately 2 kW of electricity, covers an area of ​​​​up to 2-3 square meters, is operated by one person and maintains a part feed speed of 3-6 meters per minute. In order for all machine systems to function, a 0.6 MPa compressed air supply system is connected.

Usually, the edge banding machine is first tested, and the reliability of the glue line and the degree of adhesion of the glue are controlled. To carry out the test, a transparent PVC film can be used, which allows you to observe the distribution of the adhesive after compression and polymerization. When the work shift changes, it is also recommended to carry out tests to prevent the occurrence of a latent violation.

All cutting tools are well sharpened. This applies to guillotine knives and cutters. Do not forget to regularly clean the glue bath. The edge banding machine can be equipped with a fence and have markings for heated surfaces. The machine bed must be grounded. The device must be connected to an aspiration system, as the heated adhesive may release toxic substances that pose a health hazard.

Such a device does not require any configuration. It is necessary to adjust the heating temperature of the adhesive and the tape, correctly set the rotational speed of the rollers that apply the adhesive, as well as the feed rate. It is very important that when applied to the edge or tape, the amount of adhesive is optimally suited to all conditions. If it is not enough, the strength of the bond between the material and the workpiece may be lost. Excess glue will cause excess amount to be squeezed out onto the surface and dirt will appear.

What does the work cycle look like? The workpiece moves along the edge banding machine. The carriage with the saw begins to move at the feed rate in the same direction. On a short time the saw becomes stationary and cuts off the excess part of the tape. To prevent the machine from damaging the part during operation, there is a restrictive roller. To clean sawing waste, a branch of the suction system is connected to the trimming module.

Classification of edge banding machines

Edging machines are divided into the following types: machines for curved edges and for straight edges. In the design of straight edge banding machines, as a rule, automatic material feeding is used, in edge banding machines for curved edges, manual material feeding is used. Manual edge banders are not intended for large factories. There are combined machines that can operate in different modes and provide for both manual and automatic feed of the workpiece.

Edge banding machines are single and double sided. The first of them have a high cost and pay off only in the conditions of large and medium-sized industries. These machines can only cover rectangular edges, but they have many features that are not available on positional machines.

These are mainly operations that are associated with the elimination of defects and giving products a finished look. Double-sided edgebanding machines are identical in functionality to the previous type, however, they are able to edgeband simultaneously on both sides due to more complex mechanics.

Recently, portable machines have appeared that have a special bath for heating the glue to an acceptable temperature. It is endowed with several handles and a roller for rolling the lining to the edge. With this use, the cladding is installed on a specially prepared support. Portable devices can be used for gluing plastic with a small thickness on rectangular parts. They can also be fixed on the table or work as stationary devices.

Manufacturing of an edge banding machine

Because of high price edge banding machine, many prefer homemade edge devices, but they have lame safety precautions, so you should be very careful. Before thinking about creating a machine, you need to pay attention to the thickness of the material with which the equipment will work, think about what material it will work with, and what fixtures should be in without fail. First you need to prepare the base, which includes a system for supplying the facing material, pressing, heating and applying glue.

The standard equipment of the facing machine includes:

• knot of automatic cutting of an edge;
• rotation regulator with feed rate indicator;
• thermostat with support for the standby function and protection against premature operation;
• node for feeding the edge into the area of ​​gluing;
• switch for working with straight parts;
• hair dryer bracket;
• textolite wear-resistant guides.

Edge banding machines are used in almost all woodworking enterprises, however, their design and structural elements can vary significantly. It depends mainly on the amount of work that is performed using this unit. Therefore, it is customary to use mobile devices in small workshops, which are intended for applying edging material with an adhesive composition that has already been applied to it.

Most small businesses and households prefer to use edgebanders for edgebanding, which include only a device for unwinding and fixing the edge material, a heat gun and an incandescent roller. This device is made in the form desktop machine with the presence of a device for moving the workpiece along it. You mount the machine on the workpiece, or to be more precise, on its edge, after which you gradually advance the homemade edgebander as the work progresses.

For more advanced and complex models of edge banding machines, a tank is provided that is designed to heat the glue and apply this composition to the edge. The tank is equipped with handles and a roller that rolls the material to the edge, which in this machine is located on a special separate support. These devices are intended for gluing plastic of increased thickness to rectangular blanks.

Overhangs of edging material, which are formed during cladding with home-made edge banding machines, are usually removed manually using special devices. These include various longitudinal guillotine devices that cut off the overhang and form chamfers on the edges of the product. All structural elements are fastened with comfortable handles for control.

After that, we can confidently say that the do-it-yourself edge banding machine is ready. It is worth remembering that when working on such a device, it is necessary to use facing material in rolls on which the adhesive composition has already been applied, otherwise you simply cannot attach anything. Since you will still need some parts to make an edge bander with your own hands, do not expect that the production of the device will cost you completely free.

Care of the edgebander

The edge banding machine, like any other equipment, needs the strictest safety precautions and careful maintenance, the neglect of which is guaranteed to reduce the life of air reducers, cuffs of cylinders and pneumatic valves. The rules for care are as follows:

1. Always keep an eye on cables and safety devices in case of damage that protect you and your machine. The fact is that a damaged cable can disrupt the operation of electrical units, and this will require urgent repairs.
2. Try to exclude the imbalance of the supply voltage in phases. When using the machine, there is a risk of voltage fluctuations, therefore, to eliminate this problem, it is necessary to install stabilizers and filters.
3. Keep away from dust, water or oil. Many people prefer to clean their own edge banding machine compressed air, but we recommend that you do not do this, because under high pressure foreign bodies can penetrate into protected places. Instead, use brushes instead.
4. After work, clean the workplace and the machine. It is necessary to regularly lubricate the components and parts. Try to use a quality lubricant that has been proven in action.
5. Do not lower the pressure beam from above with strong pressure. Do this carefully so that the workpiece fits exactly on the worktable. If you neglect this rule, the upper pinch rollers and soft detents will quickly wear out, the motor will be overloaded, and the transport chain will stretch.
6. Monitor the condition of all pneumatic cylinders and gearboxes, as they can disrupt the nodes that are responsible for processing parts.
7. Accurately set the heating temperature and correctly choose the adhesive composition. If you use poor-quality glue, the glue station will become dirty, which will lead to the replacement of consumables.
8. When replacing spare parts, always give preference to originals.
9. Before starting work, carefully study the technology of the edge banding machine in order to properly operate the device.
10. If you notice violations in the operation of the machine, but cannot figure it out on your own, it is better to consult with professionals.
11. Don't neglect your edgebander maintenance time.

Thus, edge cladding technology is reaching a more professional level every year due to the advent of improved cladding materials and improvement production process. Today it is difficult to imagine any furniture production without a good edge banding machine, which is very simple in design, but quite expensive equipment. It is for these reasons that many people take up their manufacture on their own.

Nowadays, in the Russian furniture industry, there are almost no those left who do not know what the unit for preliminary milling of the edges of parts (joining) is and where it is located in the edge banding machine. However, what gives the consumer its use is still understood by a few. Perhaps that is why we hear over and over again the wishes to make an offer for a machine without a jointer. And among those who have already bought a machine with this device, there are those who simply turn off the preliminary cutters. Therefore, I consider it necessary to talk again about what a jointing is and what it gives.

What is a bridle?

The unit for pre-milling the edges of parts before they are veneered is often briefly referred to as the jointing unit or simply "joining". The origin of the word is German - Fügeaggregat. The task of this operation is to remove a layer of material from the edge of the part to form a straight and even surface on which the edging material is glued.

To prevent damage to already lined perpendicular edges (Fig. 1), it is equipped with two cutters rotating in opposite directions. Starts the milling cutter with counter rotation, "pressing" the material at the beginning of the workpiece. At the exit, a passing cutter works, preventing the separation of the edging material at the end of the part.

The design of the milling cutters takes into account the fact that the processed plates have lined faces. In order to avoid chipping, cutting forces must be directed inside the part. This is ensured by the location of the incisors at a slight angle to the vertical. Moreover, the slope of the upper and lower incisors has a different direction - the pattern of the cutting elements resembles the letter V.

As a rule, diamond milling cutters are used to ensure maximum tool life. Although it should be remembered that when processing natural wood (carpentry, door panels, etc.), heads with cutters made of special steel should be used - diamond is not suitable in this case.

Jointing and / or high-quality cutting?

Many furniture makers believe that it performs only one function - correcting defects in cutting board materials. From this, some conclude that it is enough to improve the quality of cutting and the need for jointing will disappear. But this is far from true.

On the one hand, pre-milling is not able to eliminate all the problems associated with cutting, and it is necessary to improve the quality of sawing in any case. On the other hand, jointing allows you to solve a much wider range of tasks. But first things first.

The defects that occur during sawing include: chips on the faces, the so-called “step” from the scoring saw, non-perpendicularity of the sides of the workpiece, non-perpendicular edges with respect to the face, non-straight edges (due to the “banana cut” or internal stresses in the material).

Pre-milling copes with the "step" from the scoring saw, chips, with a slight inclination of the edge to the face. But other problems are more difficult. The absence of a right angle between adjacent edges cannot be corrected by jointing. A part with convex arcuate edges cannot be correctly based on the guide ruler, and therefore processed with high quality. With concave edges, correct basing is only possible if their length is less than the length of the ruler.

By the way, even with the highest quality cutting, the “step” from the scoring saw still remains. It may be minimal, barely distinguishable, but it will not be possible to completely eliminate it. This, in fact, is the essence of the use of a scoring saw - the width of its cut must necessarily be greater than the cut of the main saw. And this means that after facing the edges, the adhesive seam on the bottom layer (where the trim left a trace) will be more noticeable. And this difference can be eliminated only by jointing.

Problems arise not only after cutting

Chips and minor damage to plates can occur not only during cutting, but also during storage, moving parts between operations, stacking and loading into the machine. “Loose” slabs with a thin, fragile lining are especially easily damaged. Namely, 90% of Russian companies work with such material. furniture factories. Only preliminary milling can guarantee that the line of junction of the plate and the edging material will be ideal.

Even during a slight pause between the operations of cutting and edge banding, dust settles on the workpieces, which leads to a deterioration in the quality of gluing the edge material. In addition, dust from the parts gets on the glue roller and contributes to the formation of soot. Pre-milling parts allows you to "smooth" the edges a couple of seconds before applying glue to them, which solves this problem.

The Vega company offers high-quality equipment for the production of furniture from scratch. In our catalog, you can choose a complete set of equipment to perform any operation in production efficiently and quickly, including edge processing. Our edge banders are reliable lines and machining centers that can work reliably and for a long time for you.

The modern consumer will not be surprised by cheap furniture, and the choice today is diverse, so buyers are looking not only for affordable furniture, but also for high-quality furniture. Furniture industries of various sizes have to switch to new technologies and purchase high-tech equipment, otherwise production will become unprofitable.

Features of furniture production

In Russia, furniture production mainly uses two types of materials - various options Chipboard and MDF. These are ready-made slabs that are produced at factories and represent a variety of color solutions, since they can be lined with veneer, self-adhesive film, and polymer plastics.

Buying these boards furniture production are faced with the task of cutting them and facing the edges, i.e. edges. Edge banding equipment is an expensive machine with a complex "stuffing", the choice of which simply cannot be mistaken, so it is worth considering them more carefully and more closely.

What is an edge banding machine

On the edge banding machine, you can close the sides of the workpieces with special edging material. It can be different in thickness, width and other parameters (up to 3 mm in thickness and up to 25 mm in the thickness of the layer itself). Veneer, slats, impregnated paper, and acrylic are most often used as edging material. Recently, rolled aluminum for edge processing has also appeared.

It is from the choice of edging material that it is worth starting. By choosing it, you can more accurately select the machine and not be mistaken. If there is only one material, you will not need to equip the equipment with special units, and if there are several, then you should take care in advance about choosing additional equipment.

There are two types of edge banding machines: single-sided and double-sided. They can work with straight edges. Curved edges are processed on complex machining centers equipped with special units.

At the beginning of their journey, many furniture productions do not acquire the most powerful edge processing machine, and when expanding, they have to buy another one, and another, and a third. A situation arises when a separate workshop for edge facing appears in production, in which many workers work.

Thus, the purchase of a powerful productive machine at the beginning of the production activity will save both on the wages of new employees, and on the workshop space, and on the cost of excess equipment. After all, the main thing in production is high-performance, high-quality and reliable equipment that can guarantee growth and expansion without expenses.

Machine tools, as a rule, are equipped with various components necessary to perform a variety of operations while the workpiece makes one pass through the machine. Auxiliary nodes and the parts are not basic, and in principle you can not buy them so as not to spend money and save money, however, there is a high probability that you will have to not only send the lined parts for revision, but also create jobs for their processing.

Edge banding machine

The machine has basic and additional components that are necessary for work. The main ones include:

• formatting unit (joiner);
• edging material supply unit;
• glue station;
• clamping unit;
• trimming unit;
• milling units for removing overhangs;
• cycles
• polishing unit;
• grooving unit;
• spray system.

The formatting unit on the facing machine is a saw segment and a crusher assembled on a spindle. The saw sets the size and the crusher sets the allowance. This node is associated with a joint. It is necessary to obtain the exact size and geometry of all furniture parts. The result is a regular rectangle.

Jointing is an operation during which defects on a part are removed. These can be chips, irregularities after a scoring saw when cutting, etc. Jointing allows you to use less glue in the future, to get a thin seam.

There is a special unit on the machine for supplying edging material. Depending on the type of material, this unit can be equipped with micro-prongs, a bar without them, etc. The equipment of the machine with a knife also differs depending on the power of the machine. If it is designed for thin edge material, then the knife will no longer cope with other edges, for example, plastic ones. Length allowances are also given by different machines. It is worth noting that the larger the volume of production, the greater the overrun of the edge can be, since the allowance increases.

A feature of the machine is the presence of a magazine for quick readjustment. It allows you to change the edging material by color or size.

The glue station on the machines can be made in the form of a tray (possibly removable for quick replacement of glue) or in the form of a cartridge. The adhesive is either spread onto the edging material from the roller or squeezed out from the nozzles of the cartridge.

The sizing system can also be combined - it is something between a tray and a cartridge, i.e. there is both. The glue is heated in the nozzles, and from the container it is applied to the part.

One of the most important elements of an edge banding machine is the clamping mechanism. Very often they do not pay attention to it when choosing a machine, but the final quality of furniture parts depends on it. The strength of the joining of the edging material and the workpiece depends precisely on the clamping unit. It is good if the machine is equipped with several rows of rollers that provide long-term pressure until the glue hardens.

A device that affects the overall performance of the machine is the end assembly. It removes the remnants of the edge from the ends of the workpiece. The workpiece approaches a special saw, and in the process of its movement saws off excess pieces. Then the saw carriage returns back to “wait” for the next part. Sensors regulate the operation of the unit, plus there is a device that determines the size of a suitable workpiece at the beginning of the machine (processing line). From this sensor, the computer reads information and transmits data to various devices at the time of processing. It is also important that the saws have an adjustable angle of rotation, as the adjacent edge must not be damaged.

The milling unit serves to remove excess edge overhangs along the workpieces. He also profiles the part, if it is necessary to glue a thick edge. Two milling cutters on both sides cut off unnecessary parts of the edge from above and below. The cutter angle can be adjusted to smooth two surfaces: the edge and the part.

If a thick edge is used in production, then there is a need to mill the joint of its two parts. For this, there is a profile milling unit. He is also able to process the radius edge on the parts. The profile of the part is rolled in by a copy roller, then it is processed.

A profile knife or radius scraper removes defects after milling. The fact is that after processing with a cutter, a wave is formed, which the cycle will remove. Adhesive residues from some equipment manufacturers are also removed using a flat scraper. After such processing, the edge of the edge turns white, which can also be called a defect. To remove it, a thermal edge alignment unit is used. It melts part of the edge, darkening its color and, as it were, restoring it.

The polishing and grinding unit is necessary for the final processing of the edge and part. They clean minor defects, leaking glue, etc. Leading manufacturers equip the polishing unit with a device not only for rotational movements, but also for reciprocating movements, in order to improve the quality of processing and make the wear of the unit (fabric wheels) uniform.

The sanding operation is carried out for further edging of the edge with solid wood or veneer.

To create grooves in workpieces, the machine is equipped with a grooving unit. To prevent glue or chips from sticking to the workpieces, a release fluid is used, which is sprayed with an anti-adhesive system. The blank heating system allows you to heat the edge during the cold season so that the glue does not harden on it. Thus, the bonding quality is maintained.

The adjustment of all nodes on the machine can be done manually or automatically. The first option is simpler and cheaper, but requires the participation of qualified operators. The second is more expensive, but more functional, as it allows you to diagnose errors and malfunctions.

High-quality edge banders are always equipped with a route control that monitors the position of the part and its size. These parameters depend final result and accuracy of each operation. It is better when at the entrance there is a size reading system that transmits data to a computer and includes one or another node. There are fewer sensors on the machine, which means that the probability of their failure also decreases.

The bed on which all the nodes are attached can be of different lengths, and some manufacturers sell their machines with free space on the bed so that another node can be installed there. The bed should not accept the vibrations of the nodes.

An important element of the machine tool system is the supply of workpieces. The parts are pressed against the conveyor belt by means of a V-belt or rollers. If the feed rate is high, a belt is preferred.

What to look for when choosing a machine

When choosing an edge banding machine, it is important not to make a mistake. The equipment is not cheap, it must perform many operations, complete the processing of parts, while maintaining their quality and appearance.

What is worth paying attention to? For example, if you settled on computer-controlled equipment, do not forget that its elements are sensitive to voltage drops in the network. Machine controllers can suffer due to network failures. To prevent this from happening, install a voltage stabilizer. As a rule, the installation of a stabilizer is a prerequisite for warranty service of the machine by the manufacturer.

Also, the machine is selected according to productivity, and in order to calculate it, you need to know many parameters: feed rate, distance between parts, number of parts, their dimensions, assortment of edging material.

The productivity of the equipment is directly affected by the feed rate of the workpieces. The higher it is, the higher the performance. Plus, it is worth taking into account the distance that can be between the workpieces during the passage. The smaller this distance, the higher the performance. This parameter is especially important if the machine will mainly process small parts.

Machine changeover time also affects productivity, but it all depends on the operator. There are models of machine tools with programmable controllers, thanks to which the reconfiguration of equipment is faster. If the production is going to work with boards of different thicknesses and different edging materials, it is worth considering models of CNC machines or buying several machines for individual types of boards in order to maintain production speed.

Finally, I would like to say that before buying, you need to consider several models of machine tools, compare them, consult with experts, see the equipment in operation in order to find your best option.

You can see all the presented woodworking equipment, we also suggest that you familiarize yourself with large-format printers for printing on wood, chipboard, MDF and other materials.

Any furniture maker, sooner or later, is faced with the fact that on finished product"edge falls off". This happens mainly when a number of factors are not observed. The quality of edge bonding depends on: right choice hot melt adhesive, correct setting machine, compliance with the conditions of application, high-quality edging material. When choosing an adhesive, it is necessary to take into account the feed rate of the workpiece on the machine and the density of the hot melt adhesive (degree of filling of the adhesive). According to the feed rate of the workpiece, the machines can be conditionally divided into low-speed with manual feed of the workpiece (up to 8m/min) and high-speed machines (from 8m/min and above). The principle applies here: the higher the feed rate, the higher the working temperature of the hot melt adhesive and vice versa. This is due to the fact that the adhesive must remain liquid during the period from its application to the edge until the edge is pressed against the workpiece. On low-speed machines, this period is longer than on high-speed ones, which means that the time at which the glue remains liquid should be longer. The time at which the hot melt remains liquid and ready to be bonded is called the open time. For use on low speed machines open time should be long. The increase in open time is achieved by lowering the melt temperature of the hot melt adhesive. So: to work on low-speed machines with manual feed of the workpiece, it is recommended to work with low-temperature adhesives, the operating temperature of which is 120-160 C. operating temperature from 160-180 C, such adhesives are suitable for machine tools with a speed of 8 to 14-18 m / min. When choosing glue, many, trying to reduce the cost of the product, are guided by low price per kilogram of glue. Reducing the cost of hot melt adhesive is achieved by adding fillers to the adhesive composition. With an increase in the proportion of fillers, the density of the adhesive increases (g / cm3), it has a decisive influence on the consumption of the adhesive. In practice, it has been calculated that the consumption of pure glue (density 1.00-1.03 g/cm3) is ~150 g/m2. With one kilogram of such glue, 250 linear meters of 25 mm thick edges can be glued. And the consumption of filled glue (1.35g/cm3) is ~250g/m2. One kilogram of filled glue can glue 160 running meters of 25mm thick edges. So, when using the same amount of hot melt adhesive, 65% more edges can be glued with pure (unfilled) glue. Accordingly, the cost price of the glued linear meter in the product is reduced. Pure glue has a number of advantages: improved wettability, as a result of increased adhesion, transparent, thin, inconspicuous glue line. Bonding of edging material in different colors and decors - without changing the hot melt adhesive. Reduced consumption - due to low density, cost-optimized. Unfortunately, furniture manufacturers very often have to work with wood-based panels of poor quality: very loose and porous. In such cases, you may encounter the problem of overspending pure glue (to fill a large number of pores). It is in such cases that it is advisable to use filled adhesives, where cheap fillers fill the pores. The German company JOWAT, founded back in 1919, supplies Russian market the following hot melt adhesives: low-temperature for machines with manual workpiece feed and processing of curved surfaces Yovaterm 282.20 (filled glue (1.35 g / cm3) with a working temperature of 120-160 C) and Yovaterm 282.40 (pure glue (1.03 g / cm3 ), T 120-160C) Yovaterm 282.30 (1.31g / cm3, T 160-180C) and Yovaterm 282.70 (1.45 g / cm3, T 170-190C) for medium-speed automatic machines for working on automatic high-speed equipment - unfilled Yovaterm 280.30 (1.03 g/cm3, T180-200C), low-filled Yovaterm 280.50 (1.10g/cm3, T 180-200 C), Yovaterm 284.00 (1.45 g/cm3, T 190-210 C), Yovaterm 288.90 (1.50 g / cm3, T 190-210 C) for softforming Yovaterm 288.70 (1.45 g / cm3, T 180-200 C) for Holz-Her machines hot melt adhesive in cartridges Yovaterm 286.60 (1.3 g / cm3 , T 180-200C) and Yovaterm pure 286.30 (1.03 g/cm3, T 180-200C) a wide variety of hot melt adhesive colors - beige, brown, black, white. In 2010, Follmann launched own production hot melt adhesives. Filled low-temperature adhesive Folcomelt 1542 (1.3 g/cm3, T-140-160 C) for work on machines with low feed rates. Folcomelt 1750 (1.48g/cm3, T- 180-200 C) for medium speed machines - 190-210 C) for high-speed machines.