JP2017134158A - Reed for woodwind instrument and method for manufacturing reed for woodwind instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reed for woodwind instrument having anisotropy while formed from a synthetic resin, and to provide a method for manufacturing the reed for woodwind instrument.SOLUTION: In a reed for woodwind instrument, which contains a synthetic resin as matrix, has a bump on one end side of a longitudinal direction and has a band plate shape, a plurality of kinds of regions having different characteristics exist so as to oriented in the longitudinal direction, and the characteristics are inclined on an interface in the plurality of kinds of regions. The characteristics may be elasticity, density or a color. A method for manufacturing a reed for woodwind instrument includes a step of injecting a plurality of kinds of resin compositions having different characteristics into a cavity, where an apparatus used in injection of the plurality of kinds of resin compositions has a cylindrical pipe line, a first spiral wing body 1 coaxially arranged in the pipe line, and a second spiral wind body which is arranged coaxially in the pipe line and on the downstream side of the first spiral wing body, and performs the reverse rotation to the first spiral wing body.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a woodwind instrument lead and a method for manufacturing a woodwind instrument lead.

  For example, woodwind instruments such as a saxophone and a clarinet generate sound by vibrating a strip-shaped lead attached to a pit that a player breathes in. Woodwind reeds are generally made of a natural resin composition such as bamboo or bamboo, and the surface is shaved so that the thickness gradually decreases toward the longitudinal end (tip) on the side where the player holds the mouth. A dropped vamp is provided.

  The reed for woodwind instruments formed from such a natural resin composition has a drawback that individual variations are large. For this reason, even if the user is a non-skilled player with a relatively low level of skill, select a lead that provides a satisfactory tone from among multiple leads, and do not use a lead that does not provide a satisfactory tone. The actual situation is that they are discarded. Specifically, woodwind reeds are often sold as a set of 10 pieces, but even a general user judges that only 2 to 3 pieces can be used in practice. There are many cases to do.

  Moreover, it is inevitable that moisture contained in the player's saliva and breath adheres to the woodwind instrument reed. Woodwind reeds made of bamboo and bamboo have the disadvantage that their life is relatively short because degradation is accelerated by exposure to such moisture. For this reason, the lead | read | reed excellent in durability formed from the synthetic resin is marketed.

  However, a lead made of a synthetic resin is different from a lead formed from a natural resin composition in physical properties such as vibration characteristics, so that it cannot be said that the tone and performance are sufficient. Thus, it has been proposed to improve the vibration characteristics of synthetic resin leads by blending cellulose fibers with the resin composition forming the synthetic resin leads (see, for example, Japanese Patent Application Laid-Open No. 2008-197450).

  Leads formed from natural resin compositions such as straw and bamboo have anisotropy in physical properties because the fibers are oriented in the longitudinal direction. On the other hand, when fibers are blended in a synthetic resin as described in the above publication, it is difficult to orient the fibers in a certain direction and impart anisotropy like a natural resin composition. It is difficult. If anisotropy can be imparted to a woodwind instrument lead, vibration characteristics close to those of a natural material can be obtained, and a design that improves the value of the woodwind instrument lead can be added.

JP 2008-197450 A

  In view of the above disadvantages, an object of the present invention is to provide a woodwind instrument lead having anisotropy while being formed from a synthetic resin, and a method for producing such a woodwind instrument lead.

  The invention made to solve the above-mentioned problems is a strip-shaped woodwind instrument lead having a synthetic resin as a matrix and a vamp on one end in the longitudinal direction, wherein a plurality of regions having different characteristics are in the longitudinal direction. It is a woodwind instrument lead that exists so as to be oriented and has a characteristic that is inclined at the interface between these plural types of regions.

  This woodwind instrument lead has anisotropy that has different characteristics in the longitudinal direction and the transverse direction due to the presence of multiple types of regions with different characteristics oriented in the longitudinal direction. It can have characteristics and design properties. In addition, since the characteristics are inclined at the interfaces of the plurality of regions, the woodwind instrument reed is prevented from cracking at the regions interface to improve the strength, and the entire woodwind instrument lead is integrated as a whole. Can be vibrated. Note that “inclination” of a characteristic means that the characteristic gradually changes.

  The characteristic may be elasticity, density or color. When the characteristic is elasticity or density, the woodwind instrument lead may have anisotropy in vibration characteristics. Further, when the characteristic is color, the woodwind instrument lead has a design that is not seen in the past.

  The number of types of regions having different characteristics may be two, and the two types of regions may be alternately arranged in the short direction. As described above, the number of types of the regions having different characteristics is two, and the two types of regions are alternately arranged in the short-side direction, whereby anisotropy due to the fiber orientation of the natural resin composition. The physical properties close to the characteristics can be reproduced relatively easily.

  Another invention made to solve the above-mentioned problems is a method for manufacturing a strip-shaped woodwind instrument lead having a synthetic resin as a matrix and a vamp on one end in the longitudinal direction, and having a plurality of different characteristics. A step of injecting a resin composition into a cavity, and a device used for injecting the plurality of resin compositions includes a cylindrical pipe and a first spiral blade disposed coaxially in the pipe A woodwind instrument lead comprising: a body; and a second spiral wing body that is coaxially arranged in the duct and downstream of the first spiral wing body and is reversely rotated with the first spiral wing body. It is a manufacturing method.

  Since the method for manufacturing a woodwind instrument lead includes a step of injecting a plurality of types of resin compositions having different characteristics into the cavity, the woodwind instrument lead can be manufactured relatively easily and inexpensively. Further, in the method for manufacturing a woodwind instrument lead, the apparatus used for injecting the plurality of types of resin compositions includes a cylindrical pipe line, a first spiral wing body coaxially disposed in the pipe line, and By providing the second spiral wing body, it is possible to relatively easily arrange a plurality of types of regions having different characteristics in the longitudinal direction and to incline the characteristics at the interface between these types of regions. Can be made. For this reason, the woodwind instrument lead manufacturing method can relatively easily manufacture a woodwind instrument lead having anisotropy with different characteristics in the longitudinal direction and the transverse direction.

  The woodwind instrument lead obtained by the woodwind instrument lead of the present invention and the woodwind instrument lead manufacturing method of the present invention has anisotropy while being formed from a synthetic resin.

1 is a schematic perspective view showing a saxophone to which a woodwind instrument lead according to an embodiment of the present invention is attached. It is typical sectional drawing which shows the mouthpiece of the saxophone of FIG. FIG. 2 is a schematic plan view showing a saxophone woodwind reed of FIG. 1. It is typical AA line fragmentary sectional view of the lead for woodwind instruments of FIG. It is a schematic diagram which shows the structure of the manufacturing equipment of the lead for woodwind instruments of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.

[saxophone]
FIG. 1 shows a saxophone which is a kind of woodwind instrument using a woodwind instrument lead 1 according to an embodiment of the present invention.

  The saxophone shown in FIG. 1 is provided with a mouthpiece 3 having a woodwind instrument lead 1 attached to one end of a saxophone body 2.

  The saxophone body 2 is provided with a mouthpiece 3 attached to one end and a bent tube portion 4 that is opened so that the other end is enlarged in diameter, and a plurality of sound holes formed in the tube portion 4 are provided. A plurality of keys 5 that can be sealed are provided, and a lever 6 for operating these keys 5 is provided. The configuration of the saxophone main body 2 can be the same as the configuration of the conventional saxophone main body.

  The mouthpiece 3 is attached to one end of the saxophone main body 2 and is used by a player to blow into the saxophone main body 2 and vibrate the woodwind instrument lead 1.

  As shown in FIG. 2, the mouthpiece 3 is formed in a substantially cylindrical shape, and has a shape in which one end side where the player gets into the mouth is flat and crushed, and the side in contact with the lower lip of the player is wide open. The woodwind instrument lead 1 is attached so as to seal the opening. The woodwind instrument lead 1 is fixed to the mouthpiece 3 by a ligature 7 attached to the outer periphery of the mouthpiece 3. As the mouthpiece 3 and the ligature 7, those having a conventional configuration can be used.

  The woodwind instrument lead 1 is not limited to the saxophone as shown in FIG. 1, but can be used for other woodwind instruments such as clarinet. For example, a tree using two leads such as oboe and bassoon. It can also be used for wind instruments. In the case of a woodwind instrument using two leads, the woodwind instrument lead 1 is used for only one of the two leads, and the conventional lead formed from a natural resin composition is not used for the other. Alternatively, a resin lead may be used.

[Lead for woodwind instruments]
3 and 4 show the woodwind instrument lead 1 in detail. The woodwind instrument lead 1 is formed in a strip shape using a synthetic resin as a matrix, and has a bump 8 on one end side in the longitudinal direction as shown in the figure.

  The woodwind instrument lead 1 is curved so that the surface of the portion where the vamp 8 is not formed (the surface opposite to the side attached to the mouthpiece 3) forms part of the cylindrical surface. The curved surface has a longitudinal axis parallel to the back surface (the surface on the side attached to the mouthpiece 3), and bulges to the front surface side. As a result, as shown in FIGS. 1 and 2, the woodwind instrument lead 1 is configured such that the portion where the vamp 8 is not formed is fastened with the ligature 7 so that the surface is continuous with the outer surface of the mouthpiece 3. It is held integrally with the piece 3.

  The vamp 8 is formed so as to gradually reduce the thickness of the woodwind instrument lead 1 toward the longitudinal end of the player's mouth (hereinafter also simply referred to as the “tip”). . More specifically, the vamp 8 is generally curved so that the inclination angle becomes larger toward the heel (longitudinal end portion where the vamp 8 is not formed) of the woodwind instrument lead 1, and the tip side is substantially flat. Formed to stretch. The curved shape of the vamp 8 is the same as the curved shape of the vamp formed on the conventional lead.

  That is, the approximate shape of the woodwind instrument lead 1 is the same as that of a conventional lead formed from a bag or the like. As specific dimensions of the schematic shape of the woodwind instrument lead 1, when the woodwind instrument lead 1 is an alto saxophone lead, the width is about 15 mm, the length is about 70 mm, and the vamp 8 is formed. The maximum thickness of the unexposed portion can be about 3 mm, and the thickness at the tip of the vamp 8 can be about 0.15 mm.

  Further, the woodwind instrument lead 1 exists such that a plurality of types of regions having different characteristics (two types of regions 9 and 10 in FIGS. 3 and 4) are oriented in the longitudinal direction.

  In this way, the woodwind instrument lead 1 is anisotropic in that the characteristics differ in the longitudinal direction and the lateral direction due to the presence of a plurality of regions 9 and 10 having different characteristics oriented in the longitudinal direction. Have sex.

  In the woodwind instrument lead 1, the characteristic is inclined at the interface between the regions 9 and 10. That is, the regions 9 and 10 are not clearly divided, and the composition gradually changes at the boundary. Thus, the woodwind instrument lead 1 prevents cracking at the interface between the regions 9 and 10 to improve strength, and vibrates integrally even when the vibration characteristics are different between the regions 9 and 10. be able to.

  The regions 9 and 10 have different characteristics from each other, and the properties that differ between the regions 9 and 10 are preferably at least one of elasticity, density, and color.

  When the characteristic that differs between the regions 9 and 10 is elasticity or density, the vibration propagation speeds in the regions 9 and 10 are different, and the woodwind instrument lead 1 has anisotropy in the vibration characteristics. Further, by varying the elasticity or density between the regions 9 and 10, the anisotropy of the physical properties due to the fiber orientation of the natural resin composition can be reproduced, so that the vibration characteristic of the woodwind instrument lead 1 is natural. It can be brought close to the lead formed from the resin composition.

  The lower limit of the ratio of elasticity (elastic modulus) or density (specific gravity) between the regions 9 and 10 (a value obtained by dividing the larger value by the smaller value) is preferably 1.5 and more preferably 2. On the other hand, the upper limit of the ratio of elasticity or density between the regions 9 and 10 is preferably 50 and more preferably 30. If the ratio of elasticity or density between the regions 9 and 10 is less than the above lower limit, the anisotropy of the physical properties of the woodwind instrument lead 1 may be insufficient. On the contrary, when the ratio of the elasticity or density between the regions 9 and 10 exceeds the above upper limit, the strength of one region may be insufficient, or the compatibility between the materials constituting each region may be insufficient. The lead 1 may not be easily manufactured.

  On the other hand, when the characteristic different between the regions 9 and 10 is color, a striped pattern is formed on the surface of the woodwind instrument lead 1, so that the design of the woodwind instrument lead 1 can be improved.

  In the woodwind instrument lead 1, the number of types of regions having different characteristics may be three or more. However, two types are preferable because manufacturing is relatively easy.

  In addition, it is preferable that a plurality of the two types of regions 9 and 10 having different characteristics are provided in plurality and alternately arranged in the short direction. As described above, the two types of regions 9 and 10 having different characteristics are alternately arranged in the short direction, thereby more accurately reproducing the anisotropy of the physical properties due to the fiber orientation of the natural resin composition. Therefore, a more natural sound can be generated by using the woodwind instrument lead 1.

  The lower limit of the average width (center distance) of the regions 9 and 10 on the surface of the woodwind reed 1 is preferably 0.3 mm, and more preferably 0.5 mm. On the other hand, the upper limit of the average width of the regions 9 and 10 is preferably 3 mm, and more preferably 2 mm. If the average width of each of the regions 9 and 10 is less than the lower limit, manufacturing may be difficult. On the other hand, when the average width of each of the regions 9 and 10 exceeds the above upper limit, there is a possibility that sufficient anisotropy cannot be imparted to the woodwind instrument lead 1. The widths of the regions 9 and 10 may be equal to each other, but may be different from each other within the above range.

  The woodwind instrument lead 1, that is, the synthetic resin used as the matrix of the regions 9 and 10 is not particularly limited as long as it has sufficient rigidity. However, in order to apply the manufacturing method described later, the cavity of the mold is used. Polymers that can be produced by polymerization of monomers or prepolymers within are preferred. Specific examples of the synthetic resin that becomes the matrix of the woodwind instrument lead 1 include polyethylene, acrylic resin, phenol resin, epoxy resin, polyamide, and polyurethane.

  The synthetic resins that serve as the matrix for each of the regions 9 and 10 may be different from each other. However, since it is necessary to partially mix them so that the characteristics are inclined at the interface between the regions 9 and 10, It is preferable that the synthetic resin used as a matrix has compatibility.

  The material forming the woodwind instrument lead 1 may include, for example, natural fibers such as wood fibers and bamboo fibers, inorganic fibers such as glass fibers, and synthetic fibers such as polyamide fibers in the matrix. The fibers in the matrix improve the rigidity of the woodwind reed 1.

  Although it does not specifically limit as a minimum of the content rate of the fiber in the material which forms the said lead 1 for woodwind instruments, 10 mass% is preferable and 20 mass% is more preferable. On the other hand, the upper limit of the fiber content in the material forming the woodwind reed 1 is preferably 70% by mass, more preferably 60% by mass. When the content rate of the said fiber is less than the said minimum, there exists a possibility that the rigidity of the said lead 1 for woodwind instruments cannot fully be improved. Conversely, if the fiber content exceeds the upper limit, it may be difficult to form the woodwind instrument lead 1.

  The lower limit of the average length of fibers contained in the material forming the woodwind instrument lead 1 is preferably 3 μm, and more preferably 5 μm. On the other hand, the upper limit of the average length of fibers contained in the material forming the woodwind instrument lead 1 is preferably 50 μm, and more preferably 30 μm. If the average length of the fibers is less than the lower limit, the rigidity of the woodwind instrument lead 1 may not be sufficiently improved. Conversely, when the average length of the fibers exceeds the upper limit, it may be difficult to produce the woodwind instrument lead 1 by injection molding.

[Manufacturing method for woodwind reed]
The woodwind instrument lead 1 includes a step of injecting a plurality of types of resin compositions having different characteristics into the cavity (injection step) and a step of curing the plurality of types of resin compositions in the cavity (curing step). It can manufacture by the method of providing.

  FIG. 5 shows an example of equipment for manufacturing the woodwind instrument lead 1. This manufacturing equipment includes a mold 11 having a cavity C having a shape corresponding to the woodwind instrument lead 1, an injection device 12 for injecting the plurality of types of resin compositions into the cavity C of the mold 11, and a mold 11 and a heating device 13 for heating 11.

(Mold)
The mold 11 has a cavity C having a shape corresponding to the woodwind instrument lead 1 and a gate G that opens to the heel portion of the cavity C. That is, the resin composition injected into the cavity C flows from the heel to the tip of the woodwind instrument lead 1.

  The cavity C preferably has an extension portion Ca that extends further to the tip side than a position corresponding to the tip of the woodwind instrument lead 1. The cavity preferably has an enlarged portion Cb that gradually increases in cross-sectional area from the gate G to a position corresponding to the heel of the woodwind instrument lead 1. Further, the mold 11 may have a discharge path E for discharging the air in the cavity C and the resin composition injected first from the tip of the cavity C.

  The plurality of types of resin compositions may not be able to form the regions 9 and 10 evenly at the initial stage of injection, and the flow direction of the resin composition is constant at the portion where the cross-sectional area of the flow path changes abruptly. Don't be. For this reason, by providing the extension portion Ca and the enlarged portion Cb and the discharge path E, by cutting out the portions corresponding to the extension portion Ca and the enlarged portion Cb from the resin molded body taken out from the mold 11, each region 9, Thus, the woodwind instrument lead 1 in which 10 is accurately oriented can be obtained.

(Injection device)
The injection device 12 has a plurality of delivery units 14 and 15 each including, for example, a syringe and a pump for delivering different resin compositions, and a cylindrical shape to which a plurality of types of resin compositions are simultaneously supplied from these delivery units 14 and 15. , A first spiral wing body 17 disposed coaxially in the conduit 16, and disposed coaxially within the duct 16 and downstream of the first spiral wing body 17. A wing body 17 and a reversely rotating second spiral wing body 18 are provided.

  The injection device 12 includes a plurality of the first spiral wing bodies 17 and a plurality of second spiral wing bodies 18, and the first spiral wing bodies 17 and the second spiral wing bodies 18 are alternately arranged in the axial direction. Preferably it is. The first spiral wing body 17 and the second spiral wing body 18 are plate-like bodies each having a twist that bisects the inside of the pipe line 16 and rotates by 180 ° about the central axis of the pipe line 16. Each of the plurality of resin composition flows is divided into two. As a result, the number of fluxes of the plurality of types of resin compositions is doubled, and a multilayer flow parallel to the downstream ends of the first spiral wing body 17 and the second spiral wing body 18 is generated. Form. Note that the number of the first spiral wing bodies 17 and the number of the second spiral wing bodies 18 do not have to be the same, and the first spiral wing body 17 is arranged on the most downstream side by adding one first spiral wing body 17. May be.

  Thus, each layer of the resin composition formed by the first spiral wing body 17 and the second spiral wing body 18 in the injection device 12 forms the regions 9 and 10 in the woodwind instrument lead 1. While moving in the pipe line 16 and the mold 11, the resin composition partially mixes at the interface with each other, so that the characteristic gradient at the interface between the regions 9 and 10 in the woodwind instrument lead 1 is inclined. Form.

  As a minimum of the number of the 1st spiral wing bodies 17 and the 2nd spiral wing bodies 18, 2 is preferred respectively. On the other hand, the upper limit of the number of the first spiral wing bodies 17 and the second spiral wing bodies 18 is preferably 4 respectively. When the number of the first spiral wing bodies 17 and the second spiral wing bodies 18 is less than the lower limit, the number of the regions 9 and 10 of the woodwind instrument lead 1 may be insufficient, and sufficient orientation may not be imparted. is there. Conversely, when the number of the first spiral wing bodies 17 and the second spiral wing bodies 18 exceeds the upper limit, there is a possibility that a plurality of resin compositions are mixed and the regions 9 and 10 cannot be separated.

(Heating device)
The heating device 13 may be any device that can uniformly heat the mold 11 to a set temperature. For example, an electric heater can be used. By heating the resin composition in the mold 11 with the heating device 13, curing of the resin composition can be promoted, and the manufacturing efficiency of the woodwind instrument lead 1 can be improved.

<Injection process>
In the injection step, a plurality of types of resin compositions are injected into the cavity C of the mold 11 using the injection device 12. By injecting into the cavity C the resin composition arranged in layers in the pipe line 16 by the first spiral wing body 17 and the second spiral wing body 18, a plurality of types of resin compositions are oriented in the longitudinal direction, In addition, the resin composition is mixed at the boundary between different resin compositions.

(Resin composition)
The plurality of types of resin compositions to be injected into the cavity C have a viscosity that can be injected into the cavity C without being completely mixed with each other by the injection device 12. A monomer or prepolymer that forms a synthetic resin that forms a matrix of the woodwind instrument lead 1 by polymerization is included.

  Each resin composition preferably contains a polymerization initiator (crosslinking agent). Examples of the polymerization initiator include radical polymerization initiators such as a photopolymerization initiator and a thermal polymerization initiator, and ionic polymerization initiators such as an anionic polymerization initiator and a cationic polymerization initiator.

  Each resin composition may also contain additives such as the above-described fibers, other fillers, pigments for coloring, and modifiers.

  The lower limit of the viscosity of the resin composition is preferably 100 Pa · s, more preferably 700 Pa · s. On the other hand, the upper limit of the viscosity of the resin composition is preferably 2000 Pa · s, and more preferably 1100 Pa · s. When the viscosity of the resin composition is less than the lower limit, different types of resin compositions may be mixed and the plurality of regions 9 and 10 may not be formed. On the contrary, when the viscosity of the resin composition exceeds the upper limit, the filling of the cavity tends to be incomplete, and there is a concern that the manufacturability of the woodwind instrument lead 1 is insufficient. The “viscosity” is a value measured using a B-type viscometer at 25 ° C.

<Curing process>
In the curing step, a plurality of types of resin compositions injected into the cavity C in the injection step are cured in the cavity C. In this curing step, it is preferable to heat the mold 11 in order to start the reaction of the polymerization initiator or to accelerate the polymerization reaction of the resin composition. Moreover, in a hardening process, according to the kind of polymerization initiator, you may perform irradiation of an energy ray etc. In this case, the material of the metal mold | die 11 may be made other than a metal.

  The woodwind instrument lead manufacturing method preferably further includes a step of cutting burrs and the like from the molded product taken out from the mold 11. In particular, when the cavity C has the extended portion Ca or the enlarged portion Cb, a step of cutting away portions corresponding to the extended portion Ca and the enlarged portion Cb is essential.

[Other Embodiments]
The said embodiment does not limit the structure of this invention. Therefore, in the above-described embodiment, components of each part of the above-described embodiment can be omitted, replaced, or added based on the description and common general knowledge of the present specification, and they are all interpreted as belonging to the scope of the present invention. Should.

  The woodwind instrument lead is not limited to a straight plate shape in which each region is arranged in the short direction, but each region extends in a cross-section perpendicular to the longitudinal direction in the form of a plate plate in an inclined or curved manner. Alternatively, a curved pattern may be drawn on the surface.

  The woodwind instrument lead is not limited to one manufactured by the method for manufacturing the woodwind instrument lead.

  In the woodwind instrument lead manufacturing method, the resin composition may be injected from the leading end side of the lead toward the heel side.

  In addition, the method for manufacturing the woodwind instrument lead is not limited to using a mold having a cavity having a shape corresponding to the lead, and a resin molding formed by injecting a plurality of types of resin compositions into a larger cavity. A woodwind instrument lead may be cut out from the body by machining.

  In the method for manufacturing a woodwind instrument lead, the heating in the curing step can be omitted depending on the composition of the resin composition. That is, the curing process may only wait for a lapse of time until the resin composition is cured after the injection process.

  The reed for woodwind instruments of the present invention can be widely used not only for saxophones but also for other woodwind instruments using reeds.

DESCRIPTION OF SYMBOLS 1 Lead for woodwind instrument 3 Saxophone main body 3 Mouthpiece 4 Tube part 5 Key 6 Lever 7 Ligature 8 Vamp 9, 10 Area 11 Mold 12 Injection device 13 Heating device 14, 15 Delivery part 16 Pipe line 17 First spiral wing body 18 Second spiral wing body C Cavity Ca Extension part Cb Expansion part E Discharge path G Gate

Claims (4)

A strip-shaped woodwind instrument lead having a synthetic resin as a matrix and a vamp on one end in the longitudinal direction,
There are multiple types of regions with different properties that are oriented in the longitudinal direction,
A woodwind instrument lead characterized in that the characteristics are inclined at the interface between these plural types of regions.   The woodwind instrument lead according to claim 1, wherein the characteristic is elasticity, density, or color. The number of types of regions having different characteristics is two,
The woodwind instrument lead according to claim 1 or 2, wherein the two types of regions are alternately arranged in the lateral direction. Synthetic resin as a matrix and a method for producing a strip-shaped woodwind instrument lead having a vamp on one end in the longitudinal direction,
A step of injecting a plurality of types of resin compositions having different characteristics into the cavity;
An apparatus used for injecting the plurality of types of resin compositions includes a cylindrical pipe line, a first spiral wing body coaxially disposed in the pipe line, and a coaxial and first spiral blade in the pipe line. A method for manufacturing a woodwind instrument lead, comprising: the first spiral wing body and a second spiral wing body rotating in a reverse direction, disposed on the downstream side of the body.

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