WO2023020145A1

WO2023020145A1 - Integrally-molded guitar and production process therefor

Info

Publication number: WO2023020145A1
Application number: PCT/CN2022/103996
Authority: WO
Inventors: 赵柯; 肖文启; 林龙
Original assignee: 赵柯
Priority date: 2021-08-19
Filing date: 2022-07-05
Publication date: 2023-02-23
Also published as: CN113681865A

Abstract

The present invention relates to an integrally-molded guitar and a production process therefor. The production process comprises the following successive steps: (1) material wrapping, involving roll wrapping the outer side of an air bag with carbon fiber cloth to preliminarily wrap the air bag into a shape resembling a guitar; (2) introduction into a mold for molding, involving putting the air bag wrapped with the carbon fiber cloth into an integrally molding mold, inflating the air bag after the mold is closed, expanding the air bag to enable the carbon fiber cloth to fully fill the integrally molding mold, and pressurizing and heating the integrally molding mold to tightly cure the carbon fiber cloth to form a guitar main body; and (3) demolding and blanking, involving taking out the guitar main body in the integrally molding mold, removing burrs on the guitar main body, deflating the air bag to reduce the volume, and then taking out same to obtain a complete guitar main body. The steps of the production process are rational; and the guitar main body is made in the integrally molding mold by means of one-step molding, such that the processing precision and flatness of a headstock, a neck and a barrel are ensured, the product quality is enhanced, and the production efficiency is improved.

Description

One-piece guitar and its production process

technical field

The invention relates to the field of guitars, in particular to an integrally formed guitar and a production process thereof.

Background technique

Guitar is a kind of plucked string instrument. Its main body is mainly composed of headstock 01, neck 02 and barrel 03 as shown in Figure 1. Headstock 01 is solid while neck 02 and barrel 03 are hollow. The existing guitar body It is a split structure, that is, headstock 01, neck 02, and barrel 03. After they are manufactured, they are glued together. There is no headstock 01, neck 02, and barrel on the market that can connect the main body of the guitar. 03 One-time molding process, the defects of this split guitar production process are: first, the manufacturing cycle is long, and parameters such as the cooperation of various components and product flatness cannot be guaranteed; second, local positions cannot be reinforced, and the guitar The sound quality of the piano barrel is adjusted through the sound beam, and the sound quality is unstable; the third is that there is a piano head knob hole 04 at the piano head 01, and the function of the piano head knob hole 04 is to allow the knob to extend out to adjust the guitar. The manufacturing method of the string and the head knob hole 04 is to firstly manufacture the head, and then use an electric drill to process the head knob hole. The processing accuracy cannot be guaranteed, and the aperture and position of the head knob hole are not precise enough. Affects guitar quality.

Contents of the invention

In view of the above-mentioned defects in the prior art, the present invention provides an integrally formed guitar and a production process thereof, and the specific technical solutions are as follows:

The one-piece guitar production process includes the following steps in sequence,

① Wrapping material, the outside of the airbag is wrapped with carbon fiber cloth, and it is initially wrapped in a shape similar to that of a guitar;

②Into the mold forming, put the airbag wrapped with carbon fiber cloth into the integral molding mold, inflate the airbag inside the mold after the mold is closed, the airbag expands so that the carbon fiber cloth is fully filled into the integral molding mold, pressurize and heat the integral molding mold, carbon fiber The cloth is tightly solidified to form the main body of the guitar;

③Demoulding and blanking, take out the guitar body in the one-piece molding mold, remove the burrs of the guitar body, deflate the airbag and reduce its volume, and then take it out to obtain a complete guitar body.

As an optimal solution for the integrated guitar production process of the present invention, in step ①, the outside of the airbag is wrapped with multiple layers of carbon fiber cloth, and different layers of carbon fiber cloth have different thicknesses and fiber angles to achieve local reinforcement.

As a preferred solution of the integrally formed guitar production process of the present invention, the integrally formed mold includes a male template and a female template, the male template covers the female template, and the female template is internally provided with a headstock forming groove, a neck forming groove, and a piano barrel. The forming groove, the piano head forming groove is connected to the neck forming groove, the neck forming groove is connected to the piano barrel forming groove, and the air bag is put into the neck forming groove and the piano barrel forming groove.

As a preferred solution of the integrated guitar production process of the present invention, a violin barrel slider is installed in the mother template, and the violin barrel slider includes left oblique sliders, right oblique sliders, and left transverse sliders distributed according to azimuths. , the right horizontal slider, the lower vertical slider, the left oblique slider, the right oblique slider, the left horizontal slider, the right horizontal slider, and the lower vertical slider surround the forming groove of the violin barrel. When the guitar is demolded, the violin barrel The slider moves to facilitate the guitar barrel out of the barrel forming groove.

As a preferred solution of the integrated guitar production process of the present invention, the master template is provided with a left inclined chute, a right inclined chute, a left transverse chute, a right transverse chute, a lower longitudinal chute, and a left inclined chute. The slider is slidably installed in the left inclined chute, and the left inclined chute guides the left inclined slider to move along the left inclined upward direction, and the right inclined slider is slidably installed in the right inclined chute, and the right inclined chute Guide the right oblique slider to move along the right oblique upward direction, the left horizontal slider is slidably installed in the left horizontal chute, the left lateral chute guides the left horizontal slider to move along the left horizontal horizontal direction, and the right horizontal slider is slidably installed in the right In the horizontal chute, the right horizontal chute guides the right horizontal slider to move along the right horizontal horizontal direction, the lower vertical slider is slidably installed in the lower longitudinal chute, and the lower vertical chute guides the lower vertical slider to move along the lower vertical vertical direction .

As a preferred scheme of the integrated guitar production process of the present invention, the upper molding block of the fiddlehead is installed under the male template, the lower molding block of the fiddlehead is installed above the female template, and the fiddlehead forming groove is formed by the upper molding block of the fiddlehead and the lower fiddlehead. The forming block is covered and formed, and the knob hole convex post is installed in the piano head forming groove. When the piano head is formed in the piano head forming groove, the knob hole convex post is inserted into the piano head to form the piano head knob hole.

As a preferred solution of the integrated guitar production process of the present invention, in step ②, the airbag inflation method is divided into five inflations, the first inflation pressure is 0.4-0.5kg/c㎡, and the time is 5-6 seconds. The second inflation pressure is 3-4kg/c㎡, the time is 300-305 seconds, the third inflation pressure is 8-9kg/c㎡, the time is 600-605 seconds, the fourth inflation pressure is 12-13kg/c ㎡, the time is 1200-1205 seconds, the fifth inflation pressure is 0.1-0.2kg/c㎡, and the time is 5-6 seconds.

As a preferred solution of the integrally formed guitar production process of the present invention, in step ②, the pressure applied to the integrally formed mold is 90-100 tons, and the heating temperature is 150-160°C.

An integrally formed guitar is made by the above-mentioned integrally formed guitar production process.

Beneficial effects of the present invention: the production process steps are reasonable, and the main body of the guitar is molded at one time in an integral molding mold, which ensures the processing precision and flatness of the headstock, neck, and barrel, improves product quality, and improves production efficiency. Adjust the thickness and fiber angle of the wrapped carbon fiber cloth to realize local reinforcement of the guitar to meet the requirements of guitars of different specifications, and has a wide range of applications.

Description of drawings

Fig. 1 is a perspective view of a guitar main body;

Fig. 2 is a process flow diagram of the present invention

Fig. 3 is a perspective view of the integrated mold of the present invention;

Fig. 4 is the three-dimensional view of master formwork of the present invention and piano barrel slider;

Fig. 5 is the perspective view of the piano barrel slider of the present invention;

Figure 6 is a perspective view of the master template of the present invention;

Fig. 7 is the schematic diagram of each sliding block sliding direction of the present invention;

Fig. 8 is the three-dimensional view that male formwork of the present invention, female formwork, forming block on the fiddlehead, forming block under the fiddlehead cooperate;

Fig. 9 is a perspective view when the upper molding block of the piano head and the lower molding block of the piano head are covered;

Fig. 10 is a perspective view of the first embodiment of the installation of the knob hole boss of the present invention;

Fig. 11 is a perspective view of the second embodiment of the knob hole boss installation embodiment of the present invention.

Detailed ways

Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated position or element must have a specific orientation, and must have a specific orientation. construction and operation, therefore, should not be construed as limiting the invention.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention depending on the specific circumstances.

As shown in Figures 2 and 3, the integrated guitar production process includes the following steps in sequence,

① Wrapping material, wrap carbon fiber cloth on the outside of the airbag 1, and initially wrap it into a shape similar to that of a guitar;

②Into the mold forming, put the airbag 1 wrapped with carbon fiber cloth into the integral molding mold, inflate the inside of the airbag 1 after the mold is closed, the airbag 1 expands so that the carbon fiber cloth is fully filled into the integral molding mold, and pressurize the integral molding mold Heating, the carbon fiber cloth is melted and solidified tightly to form the main body of the guitar;

③Demoulding and blanking, take out the guitar body in the one-piece molding mold, remove the burrs of the guitar body, deflate the airbag 1 and reduce its volume, and then take it out to obtain a complete guitar body.

Specifically, in step ①, the outside of the airbag 1 is wrapped with multiple layers of carbon fiber cloth, and different layers of carbon fiber cloth have different thicknesses and fiber angles to achieve local reinforcement. For example, the layers of multi-layer carbon fiber cloth include the first layer stacked from top to bottom , The second layer, the third layer, the first layer is 3K woven cloth, the second layer is carbon fiber cloth with a fiber angle of 0 degrees, and the third layer is a carbon fiber cloth with a fiber angle of 45 degrees. For example, the multi-layer carbon fiber cloth layer includes the first layer, the second layer, the third layer, the fourth layer, the fifth layer, the sixth layer, and the seventh layer stacked from top to bottom. The first layer is that the fiber angle is 45 degree carbon fiber cloth, the second layer is a carbon fiber cloth with a fiber angle of 30 degrees, the third layer is a carbon fiber cloth with a fiber angle of 0 degrees, the fourth layer is a carbon fiber cloth with a fiber angle of 90 degrees, and the fifth layer is a fiber cloth The carbon fiber cloth with an angle of 60 degrees, the sixth layer is 3K woven cloth, and the seventh layer is 1K woven cloth. The above-mentioned 3K woven fabric is a fabric pattern in which each bundle of carbon yarns is cross-woven with 3,000 fibers. The types include 3K plain weaving, 3K twill weaving, etc., referred to as 3K; There are 1K plain weave, 1K twill weave, etc., referred to as 1K; the fiber angle refers to the fiber direction of the carbon fiber cloth on the main load of the product, and the winding distribution of the carbon fiber cloth is arranged in the shape of wells, meters, abundance, etc. Local reinforcement can also be achieved by adjusting the local thickness.

As shown in Figures 3 and 4, the integral molding mold includes a male template 2 and a female template 3, the male template 2 covers the female template 3, and the female template 3 is internally provided with a head forming groove 31, a neck forming groove 32, and a barrel forming Groove 33, head forming groove 31 communicates with neck forming groove 32, and neck forming groove 32 communicates with piano barrel forming groove 33, and air bag 1 is put into neck forming groove 32, piano barrel forming groove 33, when male template 2, When the mother template 3 is molded and heated under pressure, the carbon fiber cloth will be melted and filled in the gaps formed between the air bag 1 and the headstock forming groove 31, the neck forming groove 32, and the barrel forming groove 33, and then the guitar body is formed.

As shown in Figures 4 and 5, the piano barrel slider 4 is installed in the mother template 3, and the piano barrel slider 4 includes a left oblique slider 41, a right oblique slider 42, a left transverse slider 43, a right Lateral slider 44, lower longitudinal slider 45, left oblique slider 41, right oblique slider 42, left lateral slider 43, right lateral slider 44, lower longitudinal slider 45 surround and form the piano barrel molding groove 33, When the guitar is demolded, the barrel slide block moves to facilitate the guitar barrel to break away from the barrel forming groove 33.

As shown in Figures 6 and 7, the master template 3 is provided with a left inclined chute 34, a right inclined chute 35, a left transverse chute 36, a right transverse chute 37, a lower longitudinal chute 38, and a left inclined slide block 41 is slidably installed in the left inclined chute 34, the right slanted slider 43 is slidably installed in the right slanted chute 35, the left horizontal slider 43 is slidably installed in the left horizontal chute 36, and the right horizontal slider 44 slides Installed in the right transverse chute 37, the lower longitudinal slider 45 is slidably installed in the lower longitudinal chute 38, when the airbag 1 needs to be taken and released, the left oblique chute 34 guides the left oblique slider 41 along the left oblique upward direction Move, the right oblique chute 35 guides the right oblique slider 43 to move along the right oblique upward direction, the left lateral chute 36 guides the left lateral slider 43 to move along the left lateral horizontal direction, and the right lateral chute 37 guides the right lateral slider 44 moves along the right transverse horizontal direction, and the lower longitudinal slide 38 guides the lower longitudinal slider 45 to move along the lower longitudinal vertical direction, thereby facilitating the airbag 1 to be put into and the product to be demoulded. The air hole protruding from the air nozzle 1a of the air bag 1 is initially formed into a guitar shape after the outer side of the air bag 1 is coated with carbon fiber cloth, and then put into the neck forming groove 32 and the piano barrel forming groove 33. Stretch out the air hole, inflate the airbag 1 inside to make the airbag 1 swell, and the carbon fiber cloth completely fills the gap of the mold.

As shown in Figures 8 and 9, the upper molding block 5 of the fiddlehead is installed below the male template 2, the lower molding block 6 of the fiddlehead is installed above the female template 3, and the fiddlehead molding groove 31 is formed by the upper molding block 5 of the fiddlehead and the lower molding block of the fiddlehead. 6. Cover and form, the knob hole boss 7 is installed in the piano head forming groove 21, and the knob hole boss 7 is inserted into the piano head forming the piano head knob hole when the piano head is formed in the piano head forming groove 21. As shown in Figure 10, the first installation mode of the knob hole boss 7: the upper end of the knob hole boss 7 is fixedly installed on the upper molding block 5 of the piano head, and the lower molding block 6 of the piano head is provided with an avoidance hole 8 corresponding to the position of the knob hole boss 7. When the upper molding block 5 and the lower molding block 6 of the piano head are closed, the lower end of the knob hole protrusion 7 is inserted into the avoidance hole 8. At this time, the knob hole protrusion 7 is located in the piano head forming groove 31, and the knob hole can be formed when the piano head is formed. . As shown in Figure 11, the second installation mode of the knob hole boss 7: the lower end of the knob hole boss 7 is fixedly installed on the lower molding block 5 of the piano head, and the upper molding block 6 of the piano head is provided with an avoidance hole 8 corresponding to the position of the knob hole boss. When the upper molding block 5 and the lower molding block 6 of the piano head are covered together, the upper end of the knob hole boss 5 is inserted into the avoidance hole 8, and now the knob hole boss 7 is positioned in the piano head forming groove 31, and the knob hole can be formed when the piano head is formed.

Specifically, in step ②, the airbag inflation method is divided into five inflations, the first inflation pressure is 0.4-0.5kg/c㎡, the time is 5-6 seconds, and the second inflation pressure is 3-4kg/c㎡ , the time is 300-305 seconds, the third inflation pressure is 8-9kg/c㎡, the time is 600-605 seconds, the fourth inflation pressure is 12-13kg/c㎡, the time is 1200-1205 seconds, the fifth The air pressure of the secondary inflation is 0.1-0.2kg/c㎡, and the time is 5-6 seconds. The multi-stage pulse inflation is conducive to product molding. In addition, in step ②, the pressure applied to the integral molding mold is 90-100 tons, and the heating temperature is 150- 160°C.

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. Under the premise, some simple deduction or replacement can also be made, which should be considered as belonging to the protection scope of the present invention.

Claims

The integrally formed guitar production process is characterized in that: comprising the following steps in sequence,

① Wrapping material, the outside of the airbag is wrapped with carbon fiber cloth, and it is initially wrapped in a shape similar to that of a guitar;

②Into the mold forming, put the airbag wrapped with carbon fiber cloth into the integral molding mold, inflate the airbag inside the mold after the mold is closed, the airbag expands so that the carbon fiber cloth is fully filled into the integral molding mold, pressurize and heat the integral molding mold, carbon fiber The cloth is tightly solidified to form the main body of the guitar;

③Demoulding and blanking, take out the guitar body in the one-piece molding mold, remove the burrs of the guitar body, deflate the airbag and reduce its volume, and then take it out to obtain a complete guitar body.
The integrated guitar production process according to claim 1, characterized in that: in step ①, the outside of the airbag is wrapped with multiple layers of carbon fiber cloth, and different layers of carbon fiber cloth have different thicknesses and fiber angles to achieve local reinforcement.
The integrated guitar production process according to claim 1, characterized in that: the integral molding mold includes a male template and a female template, the male template covers the female template, and the female template is provided with a headstock forming groove and a neck forming groove 1. The piano barrel forming groove, the piano head forming groove is connected to the piano neck forming groove, the neck forming groove is connected to the piano barrel forming groove, and the air bag is put into the piano neck forming groove and the piano barrel forming groove.
The integrated guitar production process according to claim 3, characterized in that: a violin barrel slider is installed in the mother template, and the violin barrel slider includes a left oblique slider, a right oblique slider, a left oblique slider, and a left oblique slider distributed according to azimuths. The horizontal slider, the right horizontal slider, the lower vertical slider, the left oblique slider, the right oblique slider, the left horizontal slider, the right horizontal slider, and the lower vertical slider surround the barrel forming groove, and the guitar is demoulded When the barrel slider moves, it is convenient for the guitar barrel to break away from the barrel forming groove.
The integrated guitar production process according to claim 4, wherein the master template is provided with a left inclined chute, a right inclined chute, a left transverse chute, a right transverse chute, and a lower longitudinal chute, The left oblique slider is slidably installed in the left oblique chute, the left oblique chute guides the left oblique slider to move along the left oblique upward direction, the right oblique slider is slidably installed in the right oblique chute, the right oblique Guide the right oblique slider to the chute to move along the right oblique upward direction, the left horizontal slider is slidably installed in the left horizontal chute, the left lateral chute guides the left horizontal slider to move along the left horizontal horizontal direction, and the right horizontal slider slides Installed in the right horizontal chute, the right horizontal chute guides the right horizontal slider to move along the right horizontal horizontal direction, the lower vertical slider slides and is installed in the lower longitudinal chute, and the lower vertical chute guides the lower vertical slider to move vertically along the lower vertical Move straight.
The integrated guitar production process according to claim 3, characterized in that: the upper molding block of the fiddlehead is installed under the male template, the lower molding block of the fiddlehead is installed above the female template, and the fiddlehead forming groove is formed by the upper molding block of the fiddlehead and the upper molding block of the fiddlehead. The forming block under the piano head is covered and formed, and the knob hole convex post is installed in the piano head forming groove. When the piano head is formed in the piano head forming groove, the knob hole convex post is inserted into the piano head to form the piano head knob hole.
According to claim 1, the integral molding guitar production process is characterized in that: in step ②, the air bag inflation method is divided into five inflations, the first inflation pressure is 0.4-0.5kg/c㎡, and the time is 5-6 seconds, the second inflation pressure is 3~4kg/c㎡, the time is 300~305 seconds, the third inflation pressure is 8~9kg/c㎡, the time is 600~605 seconds, the fourth inflation pressure is 12~ 13kg/c㎡, the time is 1200-1205 seconds, the fifth inflation pressure is 0.1-0.2kg/c㎡, the time is 5-6 seconds.
The integrated molding guitar production process according to claim 1, characterized in that: in step ②, the pressure applied to the integrated molding mold is 90-100 tons, and the heating temperature is 150-160°C.
The integrally formed guitar is characterized in that it is made by the integrally formed guitar production process described in any one of claims 1-8.