The shape of the cross-section of upholstery boards – panel wall
Connector cross-sections can have a different profile. They are primarily used to securely connect and fasten boards and for aesthetic purposes. However, we advise against complex profiling, especially amateurs, because they significantly increase the labor intensity, however, they do not always bring the desired aesthetics and, above all, depend on the production capabilities (having the right cutters).
However, we do not recommend solutions that simplify the work, like for example. nailing the carpet through the face of the board. The nail heads on the surface of the boards are detrimental to the aesthetics of the cladding and indicate a lack of good taste. If we have already spent a lot of money on expensive material, let's spare no time for its processing and assembly.
Drawing. Varieties of joints on a foreign tongue of upholstery boards: a) the sides of the boards at right angles, junction with a convex slit, b) slightly chamfered upper edge of the side of the boards, junction with a convex slit, c) butt joint, without prominence, d) butt joint with slightly cut, emphasized by the side of the boards
Connecting boards on the so-called. the pen is the most commonly used connector. It is also the simplest method of emphasizing the joint. The visible groove between the boards should not be narrower than 4 mm and wider than 12 mm. If it were narrower, it would give the impression of a machining error, wider - freedom of connection. The optimal width of the groove should be 8-10 mm (Lynx. a).
An even greater visual impression can be obtained by cutting the upper crest of the groove at a slight angle (Lynx. b).
Non-convex butt joint (Lynx. c) it is very difficult to implement. It is difficult to make a profile so accurately, that there are no height differences or visible gaps where the two boards meet. Therefore, this method of profiling should be abandoned. The mentioned inaccuracies will not be noticeable at all with the two previous methods of joining. Also bevelling at a slight angle of the top ridge of the groove (Lynx. d) will hide inaccuracies in joint processing.
Siding boards of the type in question are relatively simple to manufacture. You only need to pay attention to some processing rules.
The side planes of the boards must be parallel. You should never save on material in this way, that we will leave the side planes converging, and the parallelism will be maintained by alternating the boards with the wider and narrower ends. Even with low convergence, this error will be visible.
Whether to plan the boards directly on the thicknesser, or first on a planer and then a thicknesser? Coniferous boards are often planed directly on the thicknesser. The paneling boards are manufactured industrially – usually machined on multi-process machines, the most common four-sided planers, through which the board passes once. If the board is uneven before being processed on the thicknessing board as a result of significant twist of the fibers, it will even out significantly after machining, but some unevenness remains as a result of being copied by the machine. Some of the unevenly processed boards are discarded, but some of those that go unnoticed during sorting get to the assembly. After installation, such a defective board should be torn off and replaced, although it complicates the assembly. So if there are conditions for it, the boards should first be processed on a planer, and only then flicker on the thicknesser. With hardwood planks (oak, ash, elm, clone, birch, nut) two-step planing is simply necessary. It guarantees equal and parallel planes and easy installation of the lining.
After distorting the four longitudinal planes, the boards are cut to length at right angles and grooves are milled on both side planes. In the absence of a suitable cutter, the groove cutting can be made on a circular saw provided, that the width of the saw cut (saw blade thickness + teeth opening) is equal to the width of the keyway.
These operations are followed by grinding of longitudinal planes, which removes traces of dirt from the planer and rough areas. The edges are rounded with sandpaper no 60 to a radius of approx 1 mm.