SK6778Y1 - Method for producing musical instrument, especially recorder - Google Patents

Abstract

Described a process for producing the flute tube of the musical instrument, especially recorder. The wooden tube is made from a two-piece solid wooden prism of dried natural wood, especially ash or maple, in the each piece of the wooden prism at the first is milled along the entire length the circular groove, two fitted pieces with grooves firmly glued together, created the tubular prism with a circular hole, the surface is outlined, than the tube stained and lacquered.

Description

Musical instruments, in particular wind instruments.

BACKGROUND OF THE INVENTION

Fujara, which has a long tradition in Slovakia, belongs to the group of wind instruments. Performance and production is ensured through a whisker into which we breathe air through our mouth, modulating the air with our fingers covering the openings, resulting in unique and unique tones and melodies. From a historical point of view, the fujara is designed to be played by hands - the upper hole is eg. covered by the middle of the left hand, the middle hole is covered by the thumb of the right hand and the remaining bottom hole is covered by the ring of the right hand. Other fingering methods are also used. The production of this musical instrument in a traditional way is difficult, both in terms of production technology itself, but also in terms of the material used - in this case wood. For the production of fujari respectively. whistles are most commonly used base, maple, ash and acacia. A suitable piece should be as straight as possible without side branches. The ends obtained are perpendicular to the ends and prepared for clamping. It is fastened with joiner's clamps, tightening belts - ghettos, or with a chain on a straight, long piece of suitably placed wooden beam or thick iron L - profile. The borehole is drilled manually from both sides by various non-turrets with graduated diameters ranging from approximately 15 mm, 20 mm, 25 mm to 30 mm in a G-major tuning. It should be noted that the most common fujars are made from the base precisely because this wood has a soft flesh in the middle of the annual rings, which is used for the initial guidance of the winch, thus greatly facilitating the drilling process. However, this flesh is not always the center of the cross-section of the base, which, on the other hand, causes the wood to deteriorate by creating uneven walls of the future fujara tube when drilling. After the initial drilling, the wood drying stage takes place. Wood should be dried for at least 2 years, first months more slowly in damp and colder rooms, later drying can be accelerated by drying in warmer and drier rooms. After drying, the drilled hole deforms and shrinks by 1 to 3 mm due to drying, which requires re-drilling. After drilling, the hole is still smoothed using abrasive paper suitably rotated and attached to a flexible rod. The blank thus prepared is machined from the outside. As mentioned, the traditional method is demanding on the quality of the wood and the production method. It is particularly difficult to drill a hole, especially with tools of greater length. For this reason, tools are produced from several parts (usually three), which are joined to the final length.

Simplifying and improving the production of a wind instrument is known from JP 7140969 and A 19950602, which describes the production of a bamboo flute, where a sealant is injected into the hole prior to final drilling to ensure a uniform wall thickness of the musical instrument.

From CN201111869 (Y) 20080910, it is known to produce a wind instrument from multiple layers of tubes of uniform thickness which are bonded to one another. This ensures higher production and therefore a lower price while maintaining sound quality.

Another example of a bonded wind instrument is the Chinese flute of CN2574165 (Y) 20030917, which consists of layers of tubes, the inner being metallic and the outer being non-metallic, which are bonded together by an adhesive. Production is greatly simplified and a uniform wall thickness and thus sound quality of the tool is ensured.

The essence of the technical solution

The above-mentioned deficiencies are largely eliminated by the method of production of the whistle tube of a wind musical instrument, in particular a fujara, where the sequence of steps in the production of the fujara base, i. j. The wooden pipe of two pieces is as follows:

It is necessary to select two pieces of wood (prisms), which can be up to 180 cm long, up to 6 cm wide and up to 4 cm thick. It is a solid wood, ie a natural piece of wood that is properly dried, that is to say dried as wood must be dried before making furniture. As far as the fujara is concerned, the most suitable wood for its production is ash or maple, but other wood species such as e.g. linden, beech, oak, acacia. It is important that the wood has a bulk density of more than 650 kg / m ³ (dense wood). Suitable wood must be free from any blemishes, rot or other damage. The most suitable are pieces without knots, there can be no cracks on the prisms. Each groove is milled along the entire length of the grooves. It is suitable to use a conventional joinery milling table. It is important that the milled groove is straight, smooth and regular throughout its length. Width can be 3 cm and depth 1.5 cm.

The two pieces thus prepared, two wooden prisms in which the same groove is milled, are glued together to form a prism that will be hollow along its entire length. It will therefore have a straight hole with a diameter of e.g. 3 cm. Joining adhesives are also used for gluing, which are also used for gluing wood for furniture production (gluing takes place at normal room temperature). After applying the adhesive to the required surfaces and joining the two parts, the two are joined

SK 6778 Υ1 pieces of wood are pressed firmly together to make the joint firm. The two pieces thus tightened with vices, bolts or other similar means shall dry for at least three days. It is very important that the whole process proceeds in such a way that by milling and gluing a precise hole is created between the glued wood, which will be smooth, regular, circular on its surface and will have the same diameter along its entire length. When the joint is already firm and the adhesive is dry, the prism is machined externally. The hollow prism is machined from the outside to form a tube with a concentric hole. The external machining must therefore be regular on each side to produce a pipe with the same external diameter. A milling cutter is used for machining, which is taken from the prism gradually along its entire length so that the prism becomes a round cylinder, respectively. tube. The cylindrical wooden tube is machined to give a slight cone (conical shape) from the cylinder. This means that one end of the pipe is thicker than the other end of the pipe. The wood thus treated looks more aesthetic and the taper at the bottom has a positive effect on the sound of the instrument. The thickness of the inner hole must remain unchanged and have the same diameter over its entire length. Any minor irregularities are compensated for by grinding paper or a file. A similar procedure is followed for the production of the air duct. It is also possible to use a wood turning machine (turntable) for its external machining. The wood lathe (turntable) can also be used for external processing of the whistle tube (body of the fujara), but it is rather used for smoothing and grinding with sandpaper (sandpaper). The surface of the pipe (the body of the fujara) and the air duct must be completely smooth, which is very necessary for pickling and subsequent painting.

EXAMPLES

A method for producing a fujara base, i. j. A wooden pipe made of two pieces of prisms made of solid natural wood, consists of the following steps:

It is necessary to select two pieces of wood (prisms) that are 180 cm long, 6 cm wide and 4 cm thick. It is a solid wood, ie a natural piece of wood that is properly dried, that is to say dried as it has to be dried before making furniture. For the production of the fujara, the most suitable wood for such production is ash. It is important that the wood has a bulk density of more than 650 kg / m ³ (dense wood). Of course, suitable wood must be free of any blemishes, rot or other damage. The most suitable are pieces without knots and of course there can be no cracks on the prisms.

Each groove is milled along the length of the grooves. It is suitable to use a conventional joinery milling table. It is important that the milled groove is straight, smooth and regular throughout its length. Width 3 cm, depth 1.5 cm.

The two pieces thus prepared, two wooden prisms in which the same groove is milled, are glued to form a prism that is hollow along its entire length. It will therefore have a straight hole with a diameter of 3 cm. Joining adhesives are also used for gluing, which are also used for gluing wood for furniture production (gluing takes place at normal room temperature). After the adhesive has been applied to the required surfaces and the two parts have been joined, they are pressed firmly together to make the joint firm. The two pieces thus tightened with vices, bolts or other similar means shall dry for at least three days. It is very important that the whole process proceeds in such a way that by milling and gluing a precision hole is created between the glued parts, which will be smooth, regular, circular and have a diameter of 3 cm along its entire length.

After the bond strength is reached, the prism is machined externally. The hollow prism is machined from the outside to form a tube with a concentric hole. The external machining must be regular on each side to produce a tube with an outside diameter of 5.5 cm. A milling cutter is used for machining, which is taken from the prism gradually along its entire length so that the prism becomes a round cylinder, respectively. tube.

The cylindrical wooden tube is machined to give a slight cone (conical shape) from the cylinder. This means that one end of the pipe is thicker than the other end of the pipe. The wood thus treated looks more aesthetic and the taper at the bottom has a positive effect on the sound of the instrument. The thickness of the inner hole must remain unchanged and have the same diameter over its entire length. Any minor irregularities are compensated for by grinding paper or a file.

A similar procedure is followed for the production of the air duct. It is also possible to use a wood turning machine (turntable) for its external machining. The wood turning machine (turntable) can also be used for external processing of a wooden tube (body of a fujara), but it is more a use for smoothing and grinding with sandpaper (sandpaper). The surface of the wooden pipe (fujara body) and the air duct must be completely smooth, which is very necessary for pickling and subsequent painting.

PROTECTION REQUIREMENTS

Claims (5)

Method for producing a pipe of a musical instrument, in particular a fujara, characterized in that a wooden tube made of two pieces of prisms made of solid wood, in particular of ash or maple, is formed, each of which prisms are milled round the entire length of a circular trough 3 SK 6778 Υ1 the side and these two pieces of prisms provided with a groove are firmly glued together to form a hollow prism with a circular hole along its entire length, the surface of which is subsequently machined into a tube shape, dipped and then painted. Method for producing a pipe of a musical instrument, in particular a fujara, according to claim 1, characterized in that wood such as lime, beech, oak, acacia are used as the natural wood mass. 5 Method for producing a pipe of a musical instrument, in particular a fujara, according to claim 1, characterized in that the milled circular groove is straight, smooth and regular over its entire length. Method for producing a pipe of a musical instrument, in particular a fujara, according to claim 1, characterized in that the wooden tube is machined to a conical shape. Method for producing a pipe of a musical instrument, in particular a fujara, according to claim 1, characterized in that the machined surface of the wooden tube is regular and completely smooth on each side.