Manufacturing process of seven-stringed plucked instrument

Abstract

A guqin manufacturing process comprises the steps that S1, molds are manufactured, specifically, two to three hard female molds are duplicated with glass fiber reinforced plastic resin as a raw material; s2, semi-finished product production: S2.1, a gel coat is brushed on the surface layer of the mold, the thickness is 0.2-0.4 mm, and the brushed surface is the head layer fabric of the piano body; s2.2, the resin clear material is brushed for the second time, and the thickness is 1 mm; s2.3, the resin raw materials are mixed with saw dust to be brushed for the third time, a layer of glass wool cloth is pasted and brushed, the total thickness is about 1 mm, and five layers of cloth are brushed and brushed in total; s2.4, a resin raw material is mixed with saw dust for brush coating, cloth is attached all over the brush coating, and a surface layer of the inner cavity of the piano is made; and S2.5, integrally closing the mold, removing the mold, and manufacturing a semi-finished product of the piano body. S3, paint surface spraying; and S4, inspection. The invention belongs to the technical field of musical instrument manufacturing, provides a manufacturing process of a seven-stringed plucked instrument, adopts an existing novel material, adjusts the material ratio according to the characteristics of the seven-stringed plucked instrument, replaces a traditional wood material traditional seven-stringed plucked instrument, and solves the problems that the manufacturing time is long, the seven-stringed plucked instrument is easy to crack and warp, and the tone quality is affected.

Description

Technical Field

[0001] The invention belongs to the technical field of musical instrument manufacturing, and specifically refers to a manufacturing process for a guqin. Background Art

[0002] Guqin is a traditional Chinese musical instrument. The top of the guqin is usually made of paulownia or fir, and the bottom is made of zelkova or nanmu. However, wooden instruments will crack and warp over time, resulting in poor sound quality. In addition, the wood needs to be naturally air-dried in the production of guqin, which usually takes a long time, resulting in low production efficiency. Summary of the invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a production process for guqin, which solves the problem that the traditional guqin made of wood takes a long time to produce and is prone to cracking and warping, which affects the tone.

[0004] The technical solution adopted by the present invention is as follows: The present invention provides a manufacturing process of a guqin, comprising the following steps:

[0005] S1. Make molds: Use fiberglass resin as raw material to make hard female molds, the number of molds is 2-3;

[0006] S2. Semi-finished product production:

[0007] S2.1, Gel coat is applied to the surface of the mold with a thickness of 0.2-0.4mm. This surface is the top layer of the piano body.

[0008] S2.2, brush the resin for the second time with a thickness of 1mm;

[0009] S2.3, apply the resin raw material mixed with sawdust for the third time, and apply a layer of glass cloth, with a total thickness of about 1mm. A total of 5 layers of cloth are applied, and the total thickness of the piano body is about 6mm;

[0010] S2.4, the resin raw material is mixed with sawdust and brushed, which is spread all over the patch to make the surface layer of the inner cavity of the piano;

[0011] S2.5. Assemble the mold as a whole, remove the mold, and produce the semi-finished product of the piano body.

[0012] S3, paint spraying: sand the surface of the semi-finished piano body once, clean the surface, and then spray varnish twice;

[0013] S4. Inspection: Check whether there are any defects on the piano body.

[0014] Furthermore, the sandpaper in S3 is above 600 mesh.

[0015] Further, in step 2.1, the components of the gel coat coating are 680 parts of gel coat and 110 parts of accelerator.

[0016] Furthermore, in steps 2.3-2.4, the components of the resin raw material mixed with sawdust are: resin: 15000 parts, accelerator: 25 parts, sawdust: 1500 parts.

[0017] Furthermore, in steps 2.3-2.4, the coating components for painting the base plate are: resin: 620 parts, silica: 30 parts, accelerator: 1.5 parts; the components for painting the panel are: resin: 15,000 parts, accelerator: 25 parts, sawdust: 1,500 parts.

[0018] The beneficial effects achieved by the present invention using the above structure are as follows: This scheme provides a production process for guqin, adopts existing new materials, adjusts the material ratio according to the characteristics of guqin, and replaces traditional guqin made of traditional wooden materials, thereby solving the problems of long production time, easy cracking and warping, and affected tone. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] Example

[0021] S1. Make molds: Use fiberglass resin as raw material to make hard female molds, the number of molds is 2-3;

[0022] S2. Semi-finished product production:

[0023] S2.1, Gel coat is applied to the surface of the mold with a thickness of 0.2-0.4mm. This surface is the top layer of the piano body.

[0024] S2.2, brush the resin for the second time with a thickness of 1mm;

[0025] S2.3, apply the resin raw material mixed with sawdust for the third time, and apply a layer of glass cloth, with a total thickness of about 1mm. A total of 5 layers of cloth are applied, and the total thickness of the piano body is about 6mm;

[0026] S2.4, the resin raw material is mixed with sawdust and brushed, which is spread all over the patch to make the surface layer of the inner cavity of the piano;

[0027] S2.5. Assemble the mold as a whole, remove the mold, and produce the semi-finished product of the piano body.

[0028] S3, paint spraying: sand the surface of the semi-finished piano body once, clean the surface, and then spray varnish twice;

[0029] S4. Inspection: Check whether there are any defects on the piano body.

[0030] Among them, S3 medium sandpaper is above 600 mesh.

[0031] In step 2.1, the components of the gel coat coating are gel coat: 680 g, accelerator 110 g.

[0032] In steps 2.3-2.4, the components of the resin raw material mixed with sawdust are: resin: 15 kg, accelerator: 25 g, sawdust: 1500 g.

[0033] In steps 2.3-2.4, the coating components for painting the base plate are: resin: 620 grams, silica: 30 grams, accelerator: 1.5 grams; the components for painting the panel are: resin: 15 kilograms, accelerator: 25 grams, sawdust: 1500 grams.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0036] The present invention and its implementation methods are described above, and such description is not restrictive. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design structures and embodiments similar to the technical solution without creativity, which should all fall within the protection scope of the present invention.

Claims

1. A process for making a guqin, characterized in that: The steps include: S1. Make molds: Use fiberglass resin as raw material to make hard female molds, the number of molds is 2-3; S2. Semi-finished product production: S2.1, Gel coat is applied to the surface of the mold with a thickness of 0.2-0.4mm. This surface is the top layer of the piano body. S2.2, brush the resin for the second time with a thickness of 1mm; S2.3, apply the resin raw material mixed with sawdust for the third time, and apply a layer of glass cloth, with a total thickness of about 1mm. A total of 5 layers of cloth are applied, and the total thickness of the piano body is about 6mm; S2.4, the resin raw material is mixed with sawdust and brushed, which is spread all over the patch to make the surface layer of the inner cavity of the piano; S2.

5. Assemble the mold as a whole, remove the mold, and produce the semi-finished product of the piano body. S3, paint spraying: sand the surface of the semi-finished piano body once, clean the surface, and then spray varnish twice; S4. Inspection: Check whether there are any defects on the piano body.

2. The manufacturing process of the guqin according to claim 1, characterized in that: S3 medium sandpaper is above 600 mesh.

3. The coating for making the guqin according to claim 1, characterized in that: The components of the gel coat coating are 680 parts of gel coat and 110 parts of accelerator.

4. The coating for making guqin according to claim 1, characterized in that: The components of the resin raw material mixed with sawdust are: resin: 15000 parts, accelerator: 25 parts, sawdust: 1500 parts.

5. The coating for making guqin according to claim 1, characterized in that: The coating components for painting the base plate are: resin: 620 parts, silicon dioxide: 30 parts, accelerator: 1.5 parts; the components for painting the panel are: resin: 15,000 parts, accelerator: 25 parts, sawdust: 1,500 parts.