Curved panels and MDF parts, curved facades. Curved plywood production of radius products

Curved panels from MDF are intended for the production of furniture parts (facades, plinths, headboards and sides of beds, corner elements, legs), interior decoration of rooms and salons Vehicle. These products are used by companies - manufacturers of furniture and commercial equipment, as well as construction organizations, architectural bureaus and design studios that have necessary equipment, skills and desire to independently file, sit down and mill bent glued blanks. From several panels of different radii, by docking, you can create any radius product. For several years of work with curved glued products, pressing of dozens of profile panels with a height of up to 2400 mm of various configurations has been established: single-radius R from 34 to 3000 mm, multi-radius, one- and two-plane, thickness from 5 to 44 mm.

All panels are sold unsawn. The edges of such panels are uneven (see.a photo ) and the panel must be filed before use. Dimensions inpanel drawings indicated with the deduction of allowances for filing - 15-20 mm.

STOCK PROGRAM FOR FOLDED MDF PANELS

From curved MDF panels of the most demanded radii - 242, 300, 450, 600,1000 mm, a warehouse program has been formed. It includes curved glued panels without finishing or laminated with white finish paper with an outer or inside for further painting or wrapping with PVC films. At the request of the customer, bent panels can be laminated with CPL plastic - production time is 5 working days. The use of blanks in CPL plastic will improve the quality of wrapped panels and simplify the painting process.

For painting, panels with a thickness of 18 mm are usually selected, and for wrapping - with a thickness of 16 mm. Most often, bent painted or PVC facades for the kitchen, bathroom, and trading floor are made from the panels of the warehouse program.
The presence of a warehouse stock of bent glued MDF panels allows the manufacturer to produce parts different sizes, in the right quantities, in the shortest possible time and at the lowest prices.

The creative thought of the furniture creators is not limited to several radii of the warehouse program. Therefore, it is freely available a large assortment ready-made molds of various configurations, which can be used without additional capital investments and commissioning expectations. The only difference is that these panels are not stored ready-made, but are made to order. Production time - up to 5 working days.

RADIUS MDF PARTS Bent MDF parts are a product obtained by sawing a panel of the appropriate radius to the desired dimensions. Parts can be made from unlined panels, or can be made from panels lined with plastic, veneer, paper finish or PVC film.

At the request of the customer, it is possible to perform additional operations: MILLING ON THE PLANE AND ON THE PERIMETER, additive for fasteners, edge facing. Such parts are made without finishing.

Variety of shapes and types facing materials and allow the use of bent glued parts, like any constructive component of furniture - facade, sidewall, headboard, plinth, cornice, support ... this list is limited only by the designer's imagination. The most common radius product is a curved facade.

Surface Options
The radius panel can be unlined - for further finishing with enamels or wrapping with PVC films, or it can be covered during pressing with a facing material of the customer's choice - the panel remains to be sawn and processed with edges.
The surface of unlined panels can be different. As a rule, MDF is used on the outside, but if a smoother and denser surface is required, a panel from HOMANIT can be ordered. If deep milling is planned along the face, then a panel is recommended where all the layers of MDF are.

-Postformed plastics
The coating looks great, has a stable, durable surface, but when filing it is difficult to deal with small chips. For edging, ABC and PVC edging any thickness.
Most often, this type of finish is used in their products by manufacturers of commercial equipment, facades for kitchens and bathrooms.

- paper finish
Laminated profiled MDF panels are easy to manufacture and relatively inexpensive, although the surface is inferior in strength to laminated or painted, although recently new papers have appeared that are suitable even for 3D wrapping with increased hiding power and abrasion resistance. Some manufacturers cover the laminated parts with varnish, giving them new strength and aesthetic properties.
Most often, this type of finish is used in home furniture - bedrooms, children's rooms, living rooms, hallways.
In 2009, according to the five most common finish paper colors, a scalade program was organized for wrapping postforming panels.

Despite the huge variety building materials, produced by modern industry, their new modifications and varieties appear every year, which are distinguished by an excellent set of physical and technical parameters and unique specific properties.

One of them is flexible plywood, which has the advantages natural wood and characterized by extraordinary flexibility, not typical for other woodworking products. The reason for this flexibility lies in the raw materials used. This is the wood of tropical trees, the wood of which is characterized by low density.

These include:

• Ceiba (Ceiba). Area of ​​origin: Africa and the Middle East. Features of wood: light cream. Light weight, soft and durable. It tolerates gluing, painting, polishing and.
• Sumauma, Parika, Faveira. Area of ​​origin: Africa and South America. Features of wood: from creamy white to light brown and pinkish. It resembles ceibu in structure and composition.
• Keruing. Area of ​​origin: Indochina and countries of Asia Minor. Features of wood: red or red-brown. Very strong, resinous and hard, can be used in high humidity conditions.

Recently, flexible plywood made from birch veneer has also become widespread. It owes its specific qualities to the special structure of the layers that have a cross arrangement. The main advantage of this flexible type is its availability and lower cost compared to exotic counterparts.

Varieties of flexible wood:

Today on sale you can also find the so-called bent or bent plywood, made from thin veneer, the sheets of which are glued together during the production process according to the sketches of the future product. in the manufacture of furniture. Due to its elasticity, strength and ease of processing, this material is very convenient for creating pieces of furniture of the most inconceivable and original shapes.

Bent plywood is made from peeled veneer of birch, larch, beech, pine and even MDF. For facing its surface, veneer is used from valuable wood species, such as walnut, mahogany or oak. Due to the use of such a spectacular cladding, bent plywood products look very expensive and elegant.

The advantages of this material include:

• Great variety of shapes.
• Homogeneous structure.
• Resistance to abrasion and mechanical stress.
• Spectacular appearance and decorative.

Production and specifications

In the process of manufacturing flexible transverse plywood, layers of wood (at least 3) are interconnected with a special adhesive, after which the sheets are heated and pressed at a certain temperature. As a result of this processing, a unique and unusual material, with its high strength and lightness, it has excellent elasticity and resilience.

Technical parameters and properties of Asian plywood:

Technical parameters and properties of African plywood:

Thus, evaluating flexible plywood on a five-point scale, it can be assigned marks of "five" in the categories "practicality", "external attractiveness" and "reliability". As for availability and price range, here is this finishing material deserves a "troika" because of its high cost and "exoticism". The exception is Chinese-made flexible plywood, which combines all of the above advantages and has an affordable price.

Application and products

Curved plywood is most widely used in the furniture industry. In particular, kits for children's rooms are made from it. The main advantage of such products is their original appearance, high strength and the absence of sharp edges and corners that can injure the child. Such plywood is not suitable only for. For these purposes, special ones are used, such as, and others.

In addition, it is the basis for the manufacture of so-called bent glued elements and products, which include:

• Rocking chairs.
• Office chairs, furniture for cafes and restaurants.
• Elements upholstered furniture and facade elements of cabinet furniture.
• Flexible bed bases, called "latoflexes" or "lats".
• Decorative and constructive components of mirrors, bedside tables, cabinets, etc.

Using the previously used five-point scale, curved plywood products can be assigned "five points" for functionality, decorativeness and ease of use. And for the cost and complexity in manufacturing, they deserve a rating of "four", which confirms their high quality, originality and uniqueness.

Press for the production of plywood products:

Bending plywood at home

You can bend plywood, giving it an original and unusual shape at home. To do this, it must be placed in the appropriate conditions, with certain temperature and humidity.

The main methods used to create bent structures from this material:

• Steaming.
• Gluing.
• Creation of cuts.
• A combination of the above processing methods.

To give plywood elasticity, you can do the following:

• By immersing it in water heated to +95 ⁰С. In this case, water of the required temperature is poured into an open container of the appropriate size, after which sheets of plywood are lowered into it. Time spent in water: 5 to 30 minutes. Then the wood begins to gently bend. First, a minimal bend is made, and the workpieces are again immersed in hot water leaving it there for another half an hour. After that, the manipulation is repeated until the part acquires the desired shape.
• Having processed it with hot steam. For this purpose, you can use a regular kettle or iron with a steam function. But the main difficulty of this process lies in the fact that the effect of steam on the material must be constant and long enough, and at home it is very problematic to achieve this. In this situation, it is more convenient to work with an iron. The workpiece is wetted and ironed with a well-heated iron. Then the plywood is gently bent to a small radius. These steps are repeated several times until the desired bend is obtained.
• Soak it in warm water. The most inconvenient way, because of the duration and low efficiency.

The above methods are well suited for self-manufacturing small pieces of plywood. To bend a sheet big size, it is necessary to make cone-shaped cuts in the form of strips in it, while acting as carefully as possible to prevent the appearance of cracks and chips.

For cutting cuts, it is better to use electric jigsaw with cutter. The depth of cuts - with a sheet thickness of 4-5 mm - no more than 2 mm. Quantity - in accordance with the angle of bending. After sawing, the plywood is clamped on the template used and with epoxy glue. The drying time of the workpiece is about a day.

In order to get beautiful and original elements of high quality as a result of arching, the following points must be considered:

• The value of the transverse radius of wood fibers should be much smaller than the longitudinal.
• Manufactured parts must be stored at a humidity not exceeding 9-11%.
• Bending of steamed or heated workpieces must be done while they have not cooled down.

On the picture - original shelf bent plywood

Do-it-yourself bent plywood

After undergoing preliminary preparation, plywood can be bent in accordance with the given patterns.

At home, this can be done like this:

• A load is attached at the bend, and the edges of the sheet (supports are placed under them) are pulled together with a rope.
• Plywood is fixed with tape or rope.
• The function of a template can be performed by any structures that have the desired angle of curvature and sufficient strength. For example, fiberboard sheets cut to the appropriate shape and size.

When making a large part or a non-standard shape, it is better to use as a template steel sheet. At the same time, plywood bending must be done simultaneously with the workpiece, firmly fastening the sheets together. It will be possible to separate the template only after the design has dried well.

You can also bend plywood by gluing its layers. To do this, a template is first made, and thin layers of wood are laid on it, bending them along a given radius and smearing them with an adhesive (PVA or epoxy).

In this case, each subsequent layer must be laid on the previous one with alternating direction of the fibers. After drying, the edges of the parts are processed with a grinder to remove bumps and smudges of glue.

How to bend plywood will tell the video:

22.05.2015

Bent glued blanks are made by gluing veneer packs in heated molds with their simultaneous bending. Under such conditions, the package is deformed and takes the form of a blank, which is fixed as a result of the curing of the adhesive and the decrease in moisture content of the package during hot gluing.
Materials. For the manufacture of bent glued blanks, peeled veneer is used mainly from birch, alder and other hardwoods, less often from softwoods. The thickness of the veneer depends on the complexity of the profile, package design, angles and bending radii and is 0.95-2.2 mm.
Most often, lump veneer is used with a width of over 100 mm and a length corresponding to the size of the workpiece. In the manufacture of furniture blanks, depending on their purpose, peeled AV and BB veneers are used as outer layers, as well as sliced ​​veneer of I and II grades with a thickness of 0.6-1 mm, facing films based on decorative paper and other sheet or facing materials. For the inner layers, grade III peeled veneer is used. The grade of veneer for the manufacture of building curved glued profiles depends mainly on the calculated resistances adopted for them and, to a lesser extent, on the aesthetic qualities of the structure.
The humidity of the veneer in terms of its deformability should be the maximum allowable. It depends on the required moisture content of the finished product, corresponding to the equilibrium moisture content under operating conditions. The moisture content of the veneer also depends on the type of adhesive used and the gluing conditions. For the manufacture of curved furniture blanks, veneer must have a moisture content of 8 ± 2%, and construction - up to 12%.
Gluing veneer in the production of curved blanks is carried out with fast-curing adhesives, which increases the productivity of the process when gluing blanks of considerable thickness in low-rise presses.
For the manufacture of furniture blanks, urea-formaldehyde adhesives based on resins of the M-70, SFC-70, KF-Zh-F, KF-MT-F, etc. grades are used, and for building materials, phenol-formaldehyde grades SFZh-3013, SFZh-3014, SFZh-3011, bakelite film. The adhesives used with a viscosity of 90-230 s according to VZ-4 according to the recipe do not differ from those used in the manufacture of plywood.
Technological process. It includes the following stages: preparation of veneer, application of glue and assembly of packages, gluing of packages, machining of blanks.
Veneer preparation. The veneer, after sorting by quality and thickness, is cut in accordance with the dimensions of the blanks and the design of the packages. For the manufacture of blanks of a complex profile of variable cross section, it is cut according to the markup or according to the template in packages, the thickness of which depends on the type of equipment used and the direction of the fibers relative to the direction of the cut or cut.
Veneer packages with a thickness of up to 130 mm are cut on circular saws at a cutting speed of 45-55 m/min, a feed rate of 15 m/min for longitudinal cutting, and 6 m/min for transverse cutting. On guillotine shears of the NG-30 type or paper-cutting machines BRP-4M, the veneer is cut at a speed of movement of the machine carriage of 5.9 m/min. The greatest thickness of the packages when cutting on guillotine shears along the fibers is 90 mm, across - 30 mm, on paper-cutting machines - along the fibers 100 mm, across - 80 mm. In the process of cutting veneer, the dimensions and configuration of the blanks are controlled. Deviations in the length and width of the blanks should not exceed 5 mm per 1000 mm of the measured size.
Applying glue and assembling bags. Glue is applied to the veneer in a glue dispenser, their roller machines KV-9, KV-14. The working length of the rollers of these machines is 900 and 1400 mm, the minimum length of the processed workpieces is 350 and 500 mm. Workpiece feed rate 15 and 30 m/min. Glue consumption, depending on the complexity of the configuration of bent-glued blanks and the quality of the veneer, is 90-130 g/m2.
Preparation for gluing consists in keeping the sheets with the applied adhesive layer or assembled packages for 15-20 minutes, depending on the characteristics of the veneer and glue. The packages are most often assembled manually, which is often due to their design and the use of small-format veneer. The assembly is carried out in accordance with the geometry of the bent glued workpiece and the structure of the veneer package, which is determined by the loading conditions of the parts during operation. The principles of composition of veneer packs also take into account the thermoelastic stresses that occur in hot-glued packs.
The highest strength of the part in one direction is achieved when the number of transverse layers is 8-10% of the number of longitudinal ones. The transverse layers should be placed closer to the center of the section, while the number and location of the transverse layers should ensure the elastic-geometric symmetry of the section. The parallel arrangement of all layers in the package is acceptable in those products whose transverse dimensions are much less than their length and do not exceed 100 mm, for example, a chair leg. For parts working in shear, it is preferable to alternate longitudinal and transverse layers of veneer (for example, for the back or seat of a chair).
Packages are assembled from veneer with a thickness depending on the required radii and bending angles of the workpiece. Such an internal radius of the workpiece is considered acceptable, at which there is no destruction of the veneer wood. It depends on the thickness, species and moisture content of the veneer wood, the design and the bending angle of the package (Table 41).

The use of thin veneer for the outer layers and thick veneer for the inner layers makes it possible to produce curved glued blanks with a small radius of curvature, while reducing labor costs and the consumption of adhesive materials.
To avoid dangerous radial stresses that occur after the release of the pressing pressure on the package, the ratio of the inner bending radius to the outer should be more than 0.5. When assembling packages, it is necessary to maintain their thickness. Deviations of packages in thickness during gluing in rigid molds leads to a very uneven redistribution of pressure over the area of ​​the package.
If the package thickness is less than the calculated one, the punch pressure is transmitted mainly in its center. With a thickness greater than the calculated one, the main force is transferred to the edges of the package (Fig. 80). In the first case, the middle part of the workpiece is excessively compacted, and the edges are under insufficient pressure, and in the second case, vice versa. In both cases, it is impossible to achieve high-quality bonding. The thickness of the packages in the manufacture of bent glued blanks is set, taking into account their compaction during gluing, equal to 7-8%. A variable thickness of the profile is achieved by laying the veneer in an overlapping bag or by using additional layers of veneer (Fig. 81, a). Details of a small section (chair legs, armrests, hangers, etc. (see Fig. 5, b, 3, n) are made from multiple blanks by assembling packages of veneer of the appropriate format (Fig. 81, b). This allows more rational use equipment, raw materials, reduce labor costs.In the assembly process, control the consumption of glue, package design.

Gluing packages. When forming curved glued profiles from veneer, uniform pressure transfer to the glued package is very important. Curved blanks are made in presses equipped with molds, usually consisting of a punch and a matrix. If the profile depth is large, which often leads to the use of a complex mold, one mold is installed in the press; if the depth is shallow, the press is equipped with multi-storey molds.
The simplest in design is a one-piece rigid mold. When pressing symmetrical workpieces in rigid solid molds, the pressing force P is distributed unevenly over the package area (Fig. 82, a). On inclined or curved sections, it is equal to

With an increase in the angle of inclination, the pressure on this section of the profile decreases and, at a = 90 ° (for example, when pressing profiles with vertical walls), it is completely absent.
Simultaneously with the action of the force P ", a transverse force P" acts on the package, tending to move the veneer sheets relative to each other. Sheet shifting occurs under the condition that

In the manufacture of asymmetric profiles (Fig. 82, b), the pressing forces acting normally to inclined areas are equal to

To ensure the same pressing pressure on inclined sections of length L1 and L2, it is necessary to orient the mold relative to the direction of the pressing force P in such a way that

The difference in pressing pressure is exacerbated by mold errors and deviations in the thickness of the packages being glued. The uneven distribution of pressure on the package is the main disadvantage of rigid molds and causes uneven quality of gluing and different thicknesses of packages. Therefore, rigid one-piece molds are used only when forming shallow profiles.
Greater uniformity of pressure on the package can be achieved by using rigid molds with a dissected matrix or punch (Fig. 83, a, b). When working according to scheme a, the preliminary formation of the profile and the creation of pressure on the horizontal part of the package 2 is carried out when the plunger 1 moves down, which through the movable base 3 of the matrix 4 acts on the levers 5. The levers are rigidly connected to the side hinged walls 6 of the matrix, providing pressure on the side parts of the package.

When working according to scheme b, the composite punch with the pressing parts hinged on the vertical rod 1 is lowered into the matrix 2, forming the profile of the package 3. parts of the punch 6. Thus, a relatively uniform pressure on the package is ensured.
A relatively uniform pressure on the package can be achieved using multi-plunger presses (Fig. 83, c), each of the plungers 1 of which is equipped with a part of the matrix or punch. In this way, for example, blanks for the walls of half-boxes, legs of stools and chairs, etc. are obtained.
The pressing of bent glued blanks is also carried out in molds with metal tires in the form of tapes 1.5-2 mm thick (Fig. 83, d, e). The tire provides equalization of pressure, which is directed along the radius of curvature. It fits snugly to the package and deforms along with it. Under such conditions, sliding friction between the tire and the outer layers of the package is eliminated, which prevents their destruction. When the package is bent, its neutral axis shifts towards the tire, as a result of which the stresses in the stretched zone decrease, so profiles with smaller radii can be formed using this method.
When gluing in a mold according to scheme d, when the punch 1 is lowered, the profile of the package 2 is formed, and with further tension of the tape 3, the curved section is sequentially crimped with a tape, and the rectangular sections are pressed with side clamps 4. The profile is formed according to scheme e on a rotating punch 1, winding package 2 together with tire 3.
The disadvantages of molds with tires are their short service life, unequal pressure on the package, which is generally absent in straight sections, the impossibility of forming profiles with several bend angles.
The greatest uniformity of pressure is achieved when pressing bent glued elements by the method of elastic transfer of pressure to the package (Fig. 83, e). The forming element of the package 1 of such a mold is a punch 2. On the working surface of the matrix 3, one or more flat elastic chambers 4 are placed, into which a working fluid (for example, hot oil) or compressed air is supplied under pressure. The device on a matrix of several chambers is effective in the manufacture of complex profiles. Sequential inclusion of chambers from the middle to the edges of the profile ensures its unrestricted formation, prevents the appearance of gaps and folds on the veneer of blanks. Due to the hydrostatic pressure on the package, a high quality of gluing is achieved, it is possible to obtain blanks of the most complex profiles.
Bonding using elastic diaphragms is also carried out in vacuum or vacuum-pneumatic molds (Fig. 83, g). In them, the profile of the package 1 is formed by a rigid punch 2 in the matrix 3. In this case, the package is in a sealed chamber A between the punch and the diaphragm 4. Air is removed from the chamber through the channels 5 by a vacuum pump, and atmospheric air on the other side of the diaphragm provides pressure on the bag. The advantage of such press devices is their low metal consumption due to the absence of reactions to the press bed. In addition, the process of adhesive curing during hot gluing in vacuum is more intensive than at atmospheric pressure, harmful gaseous gluing products (phenol, formaldehyde) are removed from the pressing zone. If the pressing pressure in vacuum (up to 0.1 MPa) is insufficient, additional pressure is created by forcing air with reverse side diaphragm through channel 6.
Molds, depending on the volume of production, the method of heating them, structures are made of steel, silumin, duralumin, plywood boards, wood laminates, plastics. Elastic chambers and diaphragms are made of heat-resistant rubber, silicone and fluoroelastomer. To increase strength and wear resistance, these materials are reinforced with chafer, metal foil. The required pressure on the package depends on the method of its transfer (rigid or elastic), profile configuration. When pressing in rigid molds, the pressure is 1-2 MPa, with its elastic transmission - 0.1-0.5 MPa.
The packages are usually glued together in a hot way, which ensures high productivity of the process and low form changeability of the achieved profile shape. Packages are heated in a conductive way and less often in the field of high frequency currents (HFC). Conductive heating is provided by steam supply to the channels of the mold, tubular electric heaters, also placed inside the mold, electric contact flat heaters in the form of metal strips located on the working surfaces of non-metallic molds. With a package thickness of up to 8 mm, electrocontact heaters are placed on one side, with a larger one - on both sides. Heaters in the form of tapes up to 3 mm thick are made of steel grades 08; 10, brass grades L62, L68, bronze grade Br.OF 65-0.85, nichrome grades X15N60, X20N80, etc. surfaces of molds in the conductive method of heat transfer to the package 110-135°C.
More effective, especially when gluing thick workpieces, is heating in the HDTV field. This is due to the fact that the temperature across the cross section of the material increases in the same way. It is desirable to glue packages in the HDTV field in non-metallic molds in order to avoid generator power losses. Such heating is used, for example, in the manufacture of a closed profile chair side. The temperature of the adhesive layer during high-frequency heating reaches 100-120°C. The relative cost of the gluing process when heated in the field of HDTV, steam and electrocontact is related as 1.0: 1.05: 1.08.
The duration of gluing the package depends on the method of heating it, the temperature, the working surface of the mold during conductive heating, the thickness of the package, and the characteristics of the adhesive. With the conductive method of heating and the mold working surface temperature of 110-135°C, the specific duration of gluing with urea-formaldehyde adhesives is 0.65-0.5 min/mm, respectively. In the case of electrocontact heating to the same temperatures, its duration is 0.75-0.6 min/mm. The duration of gluing in the HDTV field depends on the input power. For heating, HDTV generators with an oscillatory power of 10-60 kW and an operating frequency of 5-25 MHz are used.
Single-plunger and multi-plunger presses are used as press equipment in the production of curved blanks (Table 42).

Loading packages into the press and unloading blanks from it, especially in the manufacture of their complex profile, large-sized, is usually done manually. In the production of blanks with a simple profile and low requirements for the geometry of the profile (for example, the back of a chair), two or three packages are loaded into each gap of the press.
The gluing area is often organized in such a way that packages at one workplace are assembled simultaneously for gluing in several presses (Fig. 84). Schemes of sections are also proposed that provide mechanized assembly of packages, their transportation, loading into the press, and unloading blanks from the press.

Molded bent glued profiles (corners, channels) are made on production lines based on a caterpillar or roller press through the type.
After gluing, bent glued blanks up to machining kept for 1-3 days. This is determined by the need to relax shrinkage stresses in them, causing their deformation of the workpieces. The deformations are especially significant across the fibers and in the places where the profile is bent. At the initial moment of exposure, the bending angle of the profile increases in comparison with the nominal ones, and then it decreases. The formability of the workpiece after pressing must be taken into account when designing molds.
During the gluing process, the parameters of the gluing mode are controlled. After gluing, the geometric dimensions of the workpieces, the gluing strength are controlled by determining the tensile strength when shearing along the adhesive layer, the bending strength of the straight sections of the profile and the bending (bend) of the curvilinear ones.
Mechanical processing of blanks. Machining of bent-glued blanks consists mainly in their trimming or processing along the perimeter, cutting multiple blanks into parts. Trimming is carried out on circular saws or band saw machines, and processing along the perimeter - on milling machines by template. Multiple blanks of half-boxes, rear legs of chairs, etc. are sawn on specialized multi-saw machines with mechanical feed. During machining, control geometric parameters details and visually - the absence of delamination, cracks in the bends of the profile.
The production of bent-glued veneer blanks is highly efficient. Depending on the type of profile of bent glued blanks, the consumption of dry veneer per 1 m3 of bent glued parts is 1.9-3 m3 (wood consumption for the manufacture of carpentry parts of a complex profile reaches 5 m3 / m3), liquid glue - 117-118 kg. On average, labor costs for the manufacture of bent-glued blanks are reduced by 25-35%, and the cost of production (mainly due to a decrease in the cost of raw materials) - by 20-30%.

Features and benefits of curved plywood products.

Parts made of curved plywood allow you to create original interior items of various shapes. Furniture manufacturing company "Formex" manufactures furniture from curved plywood using multi-layer veneer. More than 200 types of curved plywood parts are available, including interior items, chairs, armchairs, accessories: armrests for chairs and chairs, frames and parts of various configurations. Curved plywood is widely used to create decorative wooden screens for radiators, folding stools, as well as for the production of health products, in particular the exercise seat.

Thanks to the unique structure of chairs and armchairs made of bent plywood are bright and original decor any room, both office and home. Using curved plywood, you can create high-quality, practical furniture unusual design at an affordable price.

bent plywood made from thin sheets wood. Sheets are produced by sawless division. Sheets are firmly glued together in a given shape. The finished product is particularly durable and flexible.

Currently fashion trend became a combination curved plywood with other materials, such as metal. The best option is a combination of bent plywood with steel, aluminum, decorated with glass. As a structural material, curved plywood has ample opportunities for the flight of designer imagination. Furniture made from this material is practical, comfortable, and special training seats made of bent plywood have a positive effect on human health. Curved plywood can be used to make original models of sofas, chairs, armchairs, beds, bedside tables, cabinets and many other office and home interior items.

Furniture production company "Formeks" produces high-quality products from bent-glued plywood (multilayer veneer - plywood).

We offer over 100 types accessories products for the production of executive chairs, staff chairs, chairs on a metal frame, chairs for cafes and bars, armrests for chairs and chairs. The company's production capabilities and the versatility of forms allow us to produce an infinite number of chair frames and chair parts of any configuration.

Our bent plywood products are also used in the manufacture of decorative battery screens, folding stools, orthopedic products.

Currently, no manufacturer of office furniture, staff furniture, upholstered furniture and furniture for cafes and bars can do without the use of bent-glued plywood products - plywood.

Bent plywood is a blank various shapes to create unique, beautiful and stylish things that give home coziness and comfort. Flexible plywood is different from wood because it is lighter in weight, stronger, and easier to press into shape. Curved plywood is an indispensable raw material for furniture manufacturers and designers. The material is used to create original bedside tables, bookcases and other things that will make your home unique and stylish, etc.

A bendable plywood board allows a professional craftsman to create highly artistic things.

The sheets are made from thin coniferous or birch veneer, the layers are glued together using a press of a certain shape, according to the sketch of the project or details. A distinctive property of curved plywood is veneer veneer of various tree species: mahogany, cherry, oak, etc.

There are two ways to create a smooth curved shape of a plywood sheet: production and post-production. Work is carried out with non-glued veneer, as well as pressed board. Next, we will tell separately about the features of how to bend plywood correctly.

Plywood production

The process of creating plywood sheets in production has certain stages. Consider the features of manufacturing plywood:

1. The tree trunk is sawn into logs, approximately identical to each other, then they are connected with a chain.
2. The bundle is lowered into warm - almost hot - water, in which the tree is steamed and releases tar.
3. After the final exit of the tar, the veneer is removed from the steamed and softened logs in a spiral.
4. The resulting raw material is placed on a machine that lubricates the sheets with synthetic adhesive resins.
5. The inner layers are birch / coniferous, and the outer ones are made from expensive woods.
6. Depending on the thickness of the sheet, a stack is selected from the required number of layers.
7. The material is placed in a shaped press, which shapes the product.
8. Rough ends are cut on four sides.
9. Work completed item produced.

When bending a finished flat slab, you must perform the following steps:

• the sheet is steamed with an iron with a continuous supply of steam, with a sheet size of 1220x1220 or 1525x1525, it is suspended above the boiling water;
• after steaming the leaf, layers of leaves are removed from it;
• without waiting for the plywood to dry, small cuts must be made at the site of the intended bend;
• cut on both sides. neatly in chess order at a distance of two to five millimeters, the thickness of the notch depends on the thickness of the product plate itself and the dimensions of the parts;
• the sheet is bent at the required angle and it is fixed on the form;
• waiting for complete drying;
• glue on the outer and inner sides of the veneer.

The plywood sheet is bent by hot pressing and steam treatment in order to retain all of its strength, weather and water resistance properties. The process of steaming the sheet in a vessel with water is used only for bakelite alcohol-soluble plywood, since other types lose their appearance from moisture.

It is important to note that any plywood can be bent, but it is not recommended to steam the PSF yourself: toxic fumes of phenol and formaldehyde are harmful to health. FSF, FB, FBS and FBV grades can only be bent at specialized factories where the necessary safety measures are provided.

FCs can be vaped on their own, they are safe for health, but it is difficult to bend them without incisions. For the independent manufacture of furniture, flexible plywood is used, which is made from the same glued veneer, but not Russian, but exotic wood species. These materials have a low density with high strength and susceptibility to staining, bonding and polishing. Exotic breeds include:

• Ceiba is a light beige wood from the Middle East and parts of Africa. It has a soft structure, light weight and high strength;
• keruing - grows in the forests of Asia Minor. beautiful material red-brown shade with natural resistance to moisture due to the presence of resin. Characterized by strength and flexibility with high hardness;
• faveira, wig, sumauma - has various shades from snow-white to pinkish. Similar in properties to seiba.

Ready-made bent plywood board is used for the manufacture of streamlined objects decorating the room. Stylish, refined and comfortable things will complement your interior. Most requested products:

• decorative elements of cabinets, cabinets, mirrors, drawers, tables, whatnots, etc.;
• latoflexes for beds;
• stylish and comfortable rocking chairs;
• facade for cabinet furniture and decorative inserts for upholstered furniture. Beautiful and fashionable look give the room an original appearance;
• armchairs and chairs for offices, schools, kindergartens, hotels, etc.