How to bend mdf with milling. Manufacturing technology of MDF curved facades. Reaction of wood to external influences

Currently, curved MDF facades for kitchens, bedrooms and other elements of furniture have become increasingly popular. Rounded shapes allow you to get new design solutions and create a harmonious completeness of the furniture architecture of the interior.

How to bend mdf?

Therefore, the production of curved facades from MDF is an integral part of progressive furniture production.

At the current level of development, the technology of manufacturing curved facades uses a special MDF board type Master Form, Topan form and so on with a thickness of 8 mm. On one side, it has slots at intervals of about 5 mm, due to which it bends easily and retains its shape well. By gluing two blanks on a template, back side to each other, after appropriate refinement, you can get full-fledged bent furniture facades with a thickness of 16 mm.

Another, more cheap technology manufacturing of curved facades consists in forming a stack of thin sheet elements, smeared with glue and further bending them in special molds until the glue dries completely.

The most important element of the MDF curved facades technology is the production of a template frame. The radius of the templates should be approximately 3% less than the required radius, since the finished MDF curved facade continues to unfold for two weeks. Allowance for fasteners should be made in width. Chipboard residues can be used as a template material.

Curved facades from MDF, as a rule, are made of sheets of smooth fiberboard or HDF with a thickness of 3-4 mm. For the first or bottom layer, laminated HDF can be used to give nice view future facade with inside.

Blanks for curved facades are cut on a panel saw with an allowance for fixing them on a template frame and further processing.

Sheets of fiberboard or HDF, using a roller, are covered with glue and stacked, and then the entire foot is fixed with screws on the template. The resulting structure is laid in a vacuum press and covered with a silicone membrane. The bonding process takes place in a vacuum and lasts at a temperature of work surface 40-60 ° С for at least 40-60 minutes.

The resulting bent blanks, after complete cooling, are sent to a circular saw to cut the overhangs and bring them to the required dimensions.

Edge milling in the absence of more complex equipment produced by a manual milling machine with an edge molding cutter. The drawing on the front side is made on a milling-copying machine with a template.

For processing a concave surface, you will need curved facade milling machine with a curved base that follows the radius of the product and the corresponding template.

Covering curved MDF facades with PVC film on a membrane vacuum press, you should use special substrates that preserve the resulting bending radius of the product.

Manufacturing technology of curved facades is easily mastered by a beginner production furniture facades from MDF. At the same time, some investments are possible in optional equipment... However, as practice shows, own production curved facades are much cheaper for the enterprise than the purchase of finished products.

Hidden text

With the invention of ways industrial production veneer, that is, thin sheets of wood obtained by saw-free division directly from a log or a bar previously cut from it, glued plywood also appeared, that is, material in the form of flat sheets glued from several veneer sheets. Moreover, if during gluing, even before the glue cures, the veneer sheets in the package can be easily bent at a rather large angle, then after the glue curing is completed, the mutual displacement of the individual sheets is excluded and the material takes the shape set during gluing, acquiring high bending strength. The production of bent-glued parts is based on this principle, that is, products formed from separate thin sheet elements, jointly bent when glued together and held in a press until the glue is completely cured.

The technology for the production of bent-glued furniture is constantly being modernized and improved. One of the most famous is the technology for the production of curved facades, developed by specialists from the All-Russian Design and Technological Institute of Furniture / VPKTIM /, which specializes in providing technical assistance to enterprises in organizing the production of furniture. It allows you to make panels from a glued block of solid wood with a thickness of 4-6 mm, as well as from sawn veneer.

Structures of the first type - based on glued board made of solid wood with saw grooves or from several layers of glued board - the developers recommend using without cladding, which will emphasize the beauty and originality of the texture natural wood... Finishing - transparent varnishes. Considering the mentality of the Russian consumer, who, unlike the Scandinavians, is not accustomed to using knotty pine and spruce wood in household furniture, the surface of the part can be veiled with a translucent dye that will slightly muffle the texture of the wood without completely covering it.

How to bend MDF.

The surface of the aspen cannot be treated in this way, so as not to hide its beautiful silky overflows.
The second type - with a middle layer of low-grade wood and veneer with any natural or synthetic facing material... Of particular interest are the claddings made of inlaid mosaic board and sawn aspen veneer. The construction of this type is based on the use of low-waste technologies.

As the main unified element in the development of structures of any type, a bent part with an R bend from 400 to 600 mm, and a thickness of 16-20 mm is accepted. The shape and bending radius of the part are selected based on the analysis. modern trends in the design of furniture presented at international exhibitions in Cologne, Milan and Moscow. Based on such a detail as in children's designer, by combining its various options, you can get a wide variety of surface shapes: round, wavy, with a bend in the vertical or horizontal planes. In the development of structures and technologies, much attention is paid to ensuring the necessary rigidity and dimensional stability of the bent parts to be glued, as well as their environmental friendliness. Wherein great importance have the physical and mechanical characteristics of the glue used. Measuring the dimensional stability of parts various designs showed that after production of parts of multilayer structures, slight changes in the bending radius towards its increase can occur. The distance between the extreme points of the radius part 10 days after production can increase by an average of 3-4%, which is within the normal range for bent-glued parts. After this period, the form stabilizes and no further changes occur. For parts with special embedded elements, no change in bend radius occurs. Parts can be manufactured using wooden or metal heated molds, special or conventional facing presses, cold or hot. For any medium or even small business, an acceptable technology option can be found. Subsequent gluing machining and finishing of parts is carried out according to traditional technologies using conventional equipment.
As an example of a complete technological cycle for the production of bent-glued furniture, one can cite a line offered by one of the leading suppliers furniture equipment- KAMI. A similar line was demonstrated at one of the recent events in Moscow furniture exhibitions and attracted the attention of visitors. By the way, in the accompanying documentation provided by the equipment supplier, this process is named neither more nor less - "fun".

The equipment of a furniture production workshop with the use of bearing and decorative bent-glued parts depends not only on the productivity and the adopted production technology, but also on the future design of the furniture. Bent-glued elements can be made of peeled veneer of birch, beech, larch, pine, as well as MDF. The edges of bent-glued elements are most often profiled. The layers of bent-glued parts are faced with sliced veneer of hardwood or valuable breeds: beech, ash, oak, mahogany, walnut and others.

The production cycle consists of several operations. First, the veneer sheets are fed to a guillotine shear or a joining saw. Here they are cut into blanks corresponding to the size of the future veneer package for gluing the block. Face sheets of the veneer "shirt" are cut from peeled or sliced veneer and stitched together on an edge gluing machine. If MDF is used as a material, the sheets are fed to a panel saw and cut into blanks corresponding to the size of the future package. After the guillotine shears or the panel saw, the prepared set of solid sheets goes to the glue rollers, where the glue is applied and the package is formed. Formed veneer package with glue applied using hydraulic press fits into the mold. Each of the presses has its own mold for forming its own separate profile, where hot pressing is carried out. Ready blocks fit into the feet, there is a stabilization of their shape. In the case of manufacturing non-load-bearing bent-glued decorative elements (for example, facades), a hot membrane vacuum press with a template is used. The resulting bent-glued blocks go to a circular saw or band saw machine, the overhangs of the bent-glued blocks of a relatively simple shape are trimmed, and on band saw- at blocks complex shape.

The sawn blocks are transported to the planer, where a reference surface is created along their edge. After processing, the block can be fed to a vertical milling machine with a lower spindle and cut into separate workpieces using a set of saws, the distance between which corresponds to a given width of the parts. Cut and jointed workpieces are delivered to thicknessing machine for calibrating workpieces to the width of the part. The workpieces processed along the width are cut along the length on a cross-cut machine. The parts prepared in this way have milling machine using a profile cutter and a copying ring supported by lateral surface, the edges are filled up. Then the bent-glued workpieces are moved to the drilling-filler machine. Here, all the necessary holes are drilled for the installation of dowels, ties and accessories. If the design of the product provides for connections that require the selection of grooves and the formation of tenons, the corresponding parts are transferred to the drilling and grooving and tenoning machines.

After mechanical processing on grinding machine processing of flat side surfaces of workpieces and their ends, internal curved surfaces and external curved planes of parts, rounding on edges. Finishing grinding of workpieces is carried out using a hand mechanized tool.

The polished workpieces go to the preliminary assembly, which is performed on workbenches-tables and in the clamps, where the product frames are assembled. Applying a transparent or coloring primer to products is carried out in a spray booth using special guns. Then the frame is kept in the drying zone until the soil is completely cured, after which it is again transferred to the grinding department for intermediate grinding in order to remove lint and bubbles on the surface being trimmed. And the whole process ends with the application of varnish in the spray booth.

These manufacturing methods are widely used, especially in mass production... In an individual, especially with an increase in the well-being of the population, a slightly different technology is often used - for the manufacture of bent elements, as a rule, they are used different kinds fibreboards, incl. special types MDF type "Topan" or "Neaform"... But this is an expensive imported material, moreover, the parts made from it need either facing or a covering finish.

Even a cursory examination of furniture in stores shows that the enormous possibilities inherent in the technology of manufacturing bent-glued elements are still far from being fully utilized. Moreover, manufacturing technologies and areas of application of bent-glued elements are simply unlimited! In addition to the use of these elements in the production of living rooms and bedrooms, the use of bent-glued elements in the production of children's and school furniture... The absence of sharp corners, the smoothness of the lines, the collapsibility allow to design mobile and lightweight furniture, providing the child's freedom of movement, excluding the possibility of injury. Another direction in which curved glued elements have been successfully used lately is bedroom furniture. The most widespread in it today are flexible bed bases that support the mattress itself, which we call differently - "armor", "latoflexes"... They have become now essential element bed or sofa. The battens are a typical bent-glued element in the form of a curved plate that takes part of the total load from a lying person. But in bedroom furniture, other constructive and decorative bent-glued elements are very often used, which make up the bed frame itself - its side-frame and backrests, elements of mirror frames, bedside tables and wardrobes. The spring effect created by a bent-glued element is successfully used in many design solutions... Depending on the architectural design, they allow you to create both inexpensive furniture intended for a general consumer, and elite, used in the most prestigious interiors.

superduse

29.07.2008 12:57

We use (by the way, produce ourselves) a special material Master Forms, for the manufacture of products of complex shapes, an analogue of the German TOPAN FORM, MDF Flex. This material is made of 8 mm MDF, on the one hand its surface is smooth and even, and on the other - "cut". This feature allows you to create the desired curved shape. If, by bending and aligning the cuts, glue two sheets together, the structure will lose its flexibility and retain the desired shape... Using the Master Form saves time on making a product.
Using the Master-Form allows you to make products of various radii, saving time due to simple gluing technology.
The material is intended for the manufacture of facades and furniture frames.
dimensions:
2800x1019
2070x564

shcha upload photos of those. process, I'll post it!
and it looks like this

fill007, glue MDF 3 and mill

We open it, see what we do not understand, we ask. No comments, everything is similar to Vladus's post - just live photos !!

by the way, so that there is no question - a simple white Whatman paper (cardboard) is glued between the master form

The MDF board, being a fairly durable, easy-to-handle and fairly clean material in terms of ecology, is widely used in the manufacture of furniture for kitchens and bathrooms. It is also convenient to use it when making furniture with your own hands.

Sometimes, as in this particular case, it becomes necessary to make curved facades, which you simply cannot buy in a store. I want to tell you how I made curved fronts from MDF for a cabinet under a round washbasin in the bathroom.

How to make curved facades from MDF

For the manufacture of curved facades, we will use two 9mm thick MDF sheets - one for the inside of the facade, and the other for the outside. The facade will turn out to be smooth both from the inside and from the outside.

It will not work just like that to bend the MDF slab under a small radius, and even so that it then remains in this state. We'll have to make cuts on it across the fold.

First, we make a template. In my case, the shelves themselves of the future cabinet under the sink served as a template. MDF sheets need to be cut off with a margin of length and width: then you can easily cut off the excess, but you will hardly be able to add the missing one. Do not forget that the outer radius of the curved facades is larger than the inner one, and therefore the outer workpiece must be longer.

Find the centers of both blanks and mark with dashed lines in height on both sides of the blanks: along these lines, we will then combine the blanks with each other before gluing.

Mark for cuts before the transition of your semicircle to a straight plane. Each line should be 5mm apart from one another.

Adjust the circular saw so that the board does not cut too deep, and the insufficient cutting depth will make it difficult to bend and the board may even break. The hinge should be about 1mm.

Advice: Before you start making cuts on blanks for curved facades, practice on unnecessary MDF scraps of the required length. Apply markings on them, saw through every 5 millimeters, attach one strip to the template with cuts outward, and another on top of it with cuts inward.

Now you will know exactly how many cuts to make on each of the blanks before moving from a semicircle to a plane. You will also see that somewhere, it may not be necessary to make cuts every 5mm, and you can cut less often.

When making cuts in workpieces, do not throw away the sawdust - you will still need it.

We fill the cuts on both blanks with a paste made from a mixture of wood glue and sawdust. The paste should be of such consistency that it can easily fill incisions, but not too runny. Rub the paste into the incisions with a spatula, working along the incision from the center outward so that no air pockets remain.

We dilute the glue small amount water and, moistening a brush with it, we pass it over both blanks, smoothing the paste and removing the remnants of sawdust.

We put the inner blank on the template.

We put the outer workpiece on top, combining it with the lines drawn in advance in the center of the workpieces.

We nail the workpiece to one another with thin carnations - without fanaticism, so that the carnations can then be easily pulled out. Do not be embarrassed that holes will remain from the nails: bent facades will still be primed, putty and painted anyway.

We tighten the entire economy with clamps, and leave it to dry completely.

We cut the dried workpiece as we need it, attach amplifiers to the door for installing accessories, grind the edges.

That's all, MDF curved facades are ready for finishing.

As you can see, making curved facades is not the fastest and simplest task, but you will have unique furniture that no one else has.

MFD is enough comfortable material used for the manufacture of furniture, including products of an unusual shape. You can bend the MFD, but this is a tricky procedure. To create curved facades, sheets with a thickness of 9 millimeters will be an excellent solution. In order for the facade to be smooth on both sides, it is necessary to use two sheets, which, as a result, will be connected into one (outer and inner sheets).

How to bend the MFD panel at home?

Not in all cases it is necessary to finish only a straight surface. If you have imagination, then you can create decorative elements round or semi-oval profile, diversifying its style, but here's how to deal with MDF panels that have a rectangular profile.

As practice shows, the flexibility of such finishing material more than possible, but subject to the use of thin panels. Their thickness should be no more than 3 mm and only for painting.

To bend MDF panel, cut the sheet across the fold. In order for everything to go smoothly, you need to make a template that will allow the sheets to keep their shape. Next, you need to cut off pieces of a MFD sheet of a certain size, but it is better to take with a margin (first of all, this applies to the outer sheet), then you can easily cut off all excess.

Then draw lines at the folds every 5 mm. Then take the disc plate and insert the settings so that the hinge is about 1 mm. Then we collect sawdust, after which we mix them with wood glue and fill the holes with this mixture. Since the mixture should resemble gruel, you need to fill the holes with a spatula.

The remnants of glue and sawdust are removed as follows: moisten a brush in water and work it over the surface, carefully smoothing the paste. Lay out the sheet on the template and carefully nail it in with nails, which we will later remove (do not hammer them too hard). Then we remove the workpiece, cut off all unnecessary things, hook the fittings, paint and grind.

Thanks to this technique, a dynamic effect is created, which allows you to visually increase the space of the room. The easiest way is to order such a facade in the furniture production, where for a certain fee they will make a model according to your requirements and parameters. But this is the easiest option. Despite the fact that all this seems complicated, you can make such furniture yourself, without the help of specialists. It is this article that will help you understand how to make a curved facade yourself.

The use of curved facades is often found in kitchen sets, prefabricated furniture structures or to make radius cabinet... This is done in order to give a beautiful and stylish look to your furniture, and most importantly, to make the most of the entire space in the room. Another plus is that sharp corners will not damage both the hostess and the children, who often run around such pieces of furniture.

But in order to do this work yourself, you should take into account some points:

To calculate such modules, more complex design is required than for ordinary furniture.
For the manufacture of a curved facade, you will need much more money than the standard one.
It is difficult to find a profile curved cornice and false panels, moreover, their price will be much higher than that of analogues.

But do not despair, because all this is not scary. If you find it difficult to do correct project, calculate everything desired parameters, you can ask for help from a company that manufactures furniture. They can provide not only calculation and software design, but also a three-dimensional model, which will be made according to your sketch.

You can buy the necessary elements and component parts according to the catalogs of the manufacturers. You can get it in any specialty store, take contact information there. The total cost of the furniture will be higher, but the quality is still guaranteed. Moreover, such furniture will serve you for a very long time.

Where to start

To make a curved facade with your own hands for a shelf, cabinet or for a kitchen, it will work well MDF plate... If someone has already dealt with her, it will be much easier for him. It is soft and pliable, so it can be easily processed. To make a curved facade, two slabs are needed - an internal and an external one. In total, the thickness of the workpiece should be 16 mm. To get radial details you need:

make an end template with the required radius;
subtract the right amount slabs to be bent;
cut out blanks for bent parts;
mark out the cuts where the area will bend.

To make a curved facade, prepare the following tools and materials:

MDF boards, at least 2;
pencil, ruler and tape measure;
circular and hand saw;
joiner's glue;
brush;
small nails and hammer;
small spatula;
clamps;
screwdriver and finishing tools.

Having collected such an arsenal, you can get to work.

Making a curved facade

So, to make a curved facade, you will need two MDF sheets, each 9 mm thick. As already mentioned, one of them will be external and the other will be internal. The facade will be smooth on all sides. Since most of the furniture is made of wood , difficulties in work should not arise. You will need a minimum of tools and a little patience.

To bend the slab to the desired radius and make it hold in this position for a long time, a simple effort is not enough. For this purpose, you need to make cuts on the sheet, passing across the fold. First, make a template. It can be a shelf, a cabinet or something else. We will focus on it when making the curved facade itself.

You need to cut off MDF sheets with a margin so as not to be mistaken. After all, the excess will then be easily cut off, and it will not work to finish the missing centimeters.

Remember that the inner radius of the curved facade is smaller than the outer one, so make the outer workpiece longer. After that, you need to find the center of the two blanks and mark it with dashed lines in height on one side and on the other. Based on these lines, further the workpieces will be glued together.

Depending on the type of bend, you need to apply markings for cuts, which allow you to make a rounded blank from a straight sheet of MDF. Draw lines spaced 5 mm from one another. It is thanks to these cuts that our structure will be able to acquire a bent shape and not break. Now you need to make cuts. For this you will need Circular Saw... Adjust it so that you do not cut the sheet to the bottom, but also do not leave too large a hinge. A hinge of 1 mm is considered ideal.

In order not to spoil the finished workpiece, just before making cuts, use unnecessary trimmings for training. Do everything right: mark with a distance of 5 mm and start cutting. Remember, these cuts must be made on both the outer and the inner workpieces.

How many cuts to make depends on how much you want to bend the part. If you need to make a curved corner, several stripes are needed in that place. And when you need to make shelves for the sink or cabinet in the kitchen, where the bend radius is large, the cuts should be almost over the entire plane. Do not throw away sawdust from working with a saw, you will need them in your work.

After the cuts are made, they need to be filled with a special paste, which requires wood glue and sawdust. You need to cover up the slots on both blanks. The consistency of the paste should be such that it fills the incisions easily, but also not very runny. Using a spatula, rub the mixture into the slots. To avoid air pockets, apply the paste along the incision from the center outward.

Then dilute the glue using a little water. Use a brush to run the solution over the two pieces to smooth out the paste and remove excess sawdust. Then place the inner blank onto the template. On top of it, the outer workpiece is laid, aligning with the applied dashed lines, which were applied in the center of the workpieces.

Next, you need to nail the blanks to one another using thin nails. Do not hammer them in too hard so that they can be easily removed. Do not worry that holes will remain from them, everything will need to be primed, putty and painted even further the facade. Therefore, all holes will be hidden and invisible.

The facade must be fixed with clamps and left until it is completely dry. After drying, the workpiece must be cut as necessary, cleaned, sanding the edges and equipped with reinforcements for the fittings. After that, it is ready for finishing.

It is not very easy and quick to make a curved facade, but such an element in your design will attract others, delight you with its beauty and save space. Especially if it is a small kitchen or bathroom. You will also protect yourself and your family from injuries and bruises.

Video

This video shows how a curved facade is made: