Method for manufacturing Bluetooth sound box shell from basalt fiber composite material and product thereof

Abstract

The invention provides a method for manufacturing a Bluetooth sound box shell from a basalt fiber composite material and a product thereof, and the method comprises the following steps: impregnating basalt fibers with epoxy resin to prepare prepreg cloth, and cutting according to the shape and size of the Bluetooth sound box shell; winding the cut prepreg on a mold core of a hot-pressing mold, and putting into the mold for fixing; the mold is closed, constant-temperature pressurization is carried out at the set temperature, and vacuumizing is continuously carried out; closing vacuum after a set time, and cooling the mold to a mold opening temperature; opening the mold, taking out the shell and the mold core, and separating the mold core from the shell; the shell is subjected to polishing and CNC machining; performing appearance treatment on the shell; and processing a horn hole in the shell. The beneficial effects of the invention are that the Bluetooth sound box housing has the advantages of high rigidity, light weight, reduced cost, low carbon, environmental protection, metallic appearance, and no influence on the excellent performance of wireless communication signal transmission.

Description

[Technical field]

[0001] The invention relates to the technical field of electronic equipment shell manufacturing, and in particular to a method for manufacturing a Bluetooth speaker shell from a basalt fiber composite material and a product thereof. [Background technology]

[0002] With the needs of office and home use, the application of smart Bluetooth speakers is increasing, and the requirements for signal transmission, portability, strength and appearance of Bluetooth speakers are also more stringent. Commonly used Bluetooth speaker shell materials are mostly metal shells such as stainless steel, aluminum alloy or plastic shells, but metal shells are easy to shield and affect signal reception and are heavy, which is not conducive to carrying. Plastic Bluetooth speaker shells have poor texture, are not resistant to dirt, and the box is thin and low in strength.

[0003] Basalt fiber is a continuous fiber drawn from natural basalt. It is a continuous fiber drawn at high speed through a wire drawing plate after the basalt material is melted at 1450℃~1500℃. It is composed of oxides such as silicon dioxide, aluminum oxide, calcium oxide, magnesium oxide, iron oxide and titanium dioxide. The density of continuous basalt fiber is about 2.7g / cm3, the tensile strength is 4000MPa, and the elastic modulus is 95GPa. It has excellent wear resistance and tensile reinforcement properties. The tensile strength at a temperature of 100~250℃ can be increased by 30%, which is higher than the tensile strength of ordinary glass fiber. Basalt fiber also has excellent wave transmission performance. Its dielectric constant and dielectric loss are better than glass, which is more conducive to signal reception. Basalt continuous fiber is not only high in strength, but also has many excellent properties such as electrical insulation, corrosion resistance, and high temperature resistance.

[0004] In addition, basalt fiber is a new type of inorganic environmentally friendly green high-performance fiber material. Its production process produces less waste and less environmental pollution. The product can be directly degraded in the environment after being discarded without any harm. Therefore, it is a veritable green and environmentally friendly material. my country has listed basalt fiber as one of the four major fibers (carbon fiber, aramid, ultra-high molecular weight polyethylene, basalt fiber) for key development, and has achieved industrial production. It has been widely used in fiber-reinforced composite materials, friction materials, shipbuilding materials, thermal insulation materials, the automotive industry, high-temperature filter fabrics, and protection fields.

[0005] In view of this, the present invention provides a method for manufacturing a Bluetooth speaker shell with a basalt fiber composite material, so that the Bluetooth speaker shell has high rigidity, light weight, reduced cost, low carbon and environmental protection, and at the same time has a metallic texture in appearance without affecting the excellent performance of wireless communication signal transmission. [Summary of the invention]

[0006] In order to solve the problems that the existing Bluetooth speaker shell material uses metal shell, which is easy to shield and affect signal reception, is heavy and not convenient to carry, and uses plastic shell, which has poor texture, is not resistant to dirt, and has a thin body and low strength, the present invention provides a method for manufacturing a Bluetooth speaker shell with basalt fiber composite material to solve the above problems.

[0007] The solution of the present invention to solve the technical problem is: a method for manufacturing a Bluetooth speaker housing from a basalt fiber composite material, comprising the following steps:

[0008] S1: Use epoxy resin to impregnate basalt fiber to make prepreg cloth, and cut the prepreg cloth according to the shape and size of the Bluetooth speaker shell;

[0009] S2: Wrap the cut prepreg around the hot pressing mold core and put it into the mold to fix it;

[0010] S3: The mold is closed, and constant temperature pressurization is performed at the set temperature, and continuous vacuum is maintained;

[0011] S4: After the set time is reached, the vacuum is turned off and the mold starts cooling until the inner and outer shells of the mold cool to the mold opening temperature;

[0012] S5: Open the mold, take out the shell and the core, and separate the core from the shell by core pulling;

[0013] S6: Grind and CNC process the shell according to the finished product size;

[0014] S7: Perform appearance treatment on the shell surface;

[0015] S8: Use high-speed punching equipment to process speaker holes on the shell.

[0016] Preferably, the basalt fibers are impregnated with epoxy resin in a single-layer or woven manner to form prepreg.

[0017] Preferably, the thickness of the Bluetooth speaker shell is 1.5 mm, the thickness of a single layer of the prepreg in S1 or S2 is 0.2 mm, the prepreg in S2 is wound on the mold core in sequence according to a stacking order of 90°-0°-90°-0°, and the total thickness of the prepreg after winding is 1.5-1.6 mm.

[0018] Preferably, the set temperature of the mold in S3 is 140°C to 170°C.

[0019] Preferably, in S4, the setting time is 10 to 15 minutes, during which the epoxy resin is cured, the shell is hot-pressed, and the mold opening temperature is 50 to 60°C.

[0020] Preferably, the appearance treatment of the shell surface in S7 includes spraying treatment or NCVM (Non conductive vacuum metallization, discontinuous coating technology or non-conductive electroplating technology) treatment.

[0021] In addition, the present invention also provides a product, which is a product produced by the method for producing a Bluetooth speaker shell using the above-mentioned basalt fiber composite material.

[0022] The beneficial effect of the present invention is that the method for manufacturing a Bluetooth speaker shell using the basalt fiber composite material of the present invention can make the manufactured Bluetooth speaker shell have the excellent performance of high rigidity, light weight reduction, cost reduction, low carbon and environmental protection, and at the same time make the appearance of the Bluetooth speaker shell have a metallic texture without affecting the transmission effect of the wireless communication signal.

Brief Description of the Drawings

[0023] Figure 1 The present invention is a flowchart of the steps of a method for manufacturing a Bluetooth speaker housing using a basalt fiber composite material.

[0024] Figure 2 It is a schematic diagram of a Bluetooth speaker housing. [Specific implementation method]

[0025] To further illustrate the technical means and effects adopted by the present invention, the following is a detailed description in conjunction with the embodiments of the present invention and the accompanying drawings.

[0026] The present invention provides a method for manufacturing a Bluetooth speaker housing using a basalt fiber composite material, comprising the following steps:

[0027] S1: using epoxy resin to impregnate basalt fiber to make a prepreg, and cutting the prepreg according to the shape and size of the Bluetooth speaker housing 1;

[0028] S2: Wrap the cut prepreg around the hot pressing mold core and put it into the mold to fix it;

[0029] S3: The mold is closed, and constant temperature pressurization is performed at the set temperature, and continuous vacuum is maintained;

[0030] S4: After the set time is reached, the vacuum is turned off and the mold starts cooling until the inner shell 1 of the mold is cooled to the mold opening temperature;

[0031] S5: opening the mold, taking out the shell 1 and the core, and separating the core from the shell 1 by core pulling;

[0032] S6: grinding and CNC (numerical control) processing of the housing 1 according to the finished product size;

[0033] S7: Performing appearance treatment on the surface of the housing 1;

[0034] S8: Processing the speaker hole 10 on the housing 1 by using a high-speed punching device.

[0035] In addition, the present invention also provides a product, which is a product produced by the method of manufacturing a Bluetooth speaker shell using the above-mentioned basalt fiber composite material. The product has excellent strength and rigidity, is low-carbon and environmentally friendly, and does not affect the transmission of wireless communication signals.

[0036] Example 1

[0037] This embodiment 1 takes the preparation of a 1.5 mm thick Bluetooth speaker housing 1 as an example to describe in detail a method for preparing a Bluetooth speaker housing from a basalt fiber composite material according to the present invention, which comprises the following steps:

[0038] S100: using epoxy resin to impregnate basalt fiber to make a prepreg, and cutting the prepreg according to the shape and size of the Bluetooth speaker housing 1;

[0039] S200: Wrap the cut prepreg around the hot pressing mold core and put it into the mold for fixing;

[0040] S300: The mold is closed, and constant temperature pressurization is performed at the set temperature, and continuous vacuum is maintained;

[0041] S400: After the set time is reached, the vacuum is turned off and the mold starts cooling until the inner shell 1 of the mold is cooled to the mold opening temperature;

[0042] S500: the mold is opened, the shell 1 and the core are taken out, and the core is separated from the shell 1 by core pulling;

[0043] S600: grinding and CNC (numerical control) processing of the housing 1 according to the finished product size;

[0044] S700: performing appearance treatment on the surface of the housing 1;

[0045] S800: Processing the speaker hole 10 on the housing 1 by using a high-speed punching device.

[0046] The basalt fiber in S100 is impregnated with epoxy resin in a single layer or woven manner to form a prepreg. The prepreg made of epoxy resin is soft and easy to wrap around the mold core, which is convenient for processing. The thickness of a single layer of the prepreg is 0.2 mm.

[0047] The prepreg in S200 is sequentially wound on the hot pressing mold core in a stacking order of 90°-0°-90°-0°, and the total thickness of the prepreg after winding is 1.5-1.6 mm.

[0048] Wherein, the set temperature of the mold in S300 is 140°C to 170°C.

[0049] Wherein, in S400, the setting time is 10 to 15 minutes. During this process, the epoxy resin is cured, the Bluetooth speaker housing 1 is hot-pressed, and the mold opening temperature is 50 to 60°C.

[0050] Among them, the appearance treatment of the surface of the shell 1 in S700 includes spraying treatment or NCVM (Non conductive vacuum metallization, discontinuous coating technology or non-conductive electroplating technology) treatment, so that the appearance 1 of the Bluetooth speaker shell has a metallic texture without affecting the transmission effect of the wireless communication signal.

[0051] The beneficial effect of the present invention is that the method for manufacturing a Bluetooth speaker shell using the basalt fiber composite material of the present invention can make the manufactured Bluetooth speaker shell 1 have the excellent performance of high rigidity, light weight reduction, cost reduction, low carbon and environmental protection, and at the same time make the appearance of the Bluetooth speaker shell 1 have a metallic texture without affecting the transmission effect of the wireless communication signal.

[0052] It should be pointed out that the present invention is not limited to the above-mentioned implementation modes, and any simple modifications, equivalent changes and modifications made to the above-mentioned embodiments by any technician familiar with the profession based on the technical solution of the present invention fall within the protection scope of the present invention.

Claims

1. A method for making a Bluetooth speaker housing from a basalt fiber composite material, characterized in that: The steps include: S1: Use epoxy resin to impregnate basalt fiber to make prepreg cloth, and cut the prepreg cloth according to the shape and size of the Bluetooth speaker shell; S2: Wrap the cut prepreg around the hot pressing mold core and put it into the mold to fix it; S3: The mold is closed, and constant temperature pressurization is performed at the set temperature, and continuous vacuum is maintained; S4: After the set time is reached, the vacuum is turned off and the mold starts cooling until the inner and outer shells of the mold cool to the mold opening temperature; S5: Open the mold, take out the shell and the core, and separate the core from the shell by core pulling; S6: Grind and CNC process the shell according to the finished product size; S7: Perform appearance treatment on the shell surface; S8: Use high-speed punching equipment to process speaker holes on the shell.

2. The method for manufacturing a Bluetooth speaker housing using a basalt fiber composite material according to claim 1, characterized in that: The basalt fiber is impregnated with epoxy resin in a single-layer or woven manner to form a prepreg.

3. The method for manufacturing a Bluetooth speaker housing using a basalt fiber composite material according to claim 1, characterized in that: The thickness of the Bluetooth speaker shell is 1.5 mm, the thickness of a single layer of the prepreg in S1 or S2 is 0.2 mm, the prepreg in S2 is wound on the mold core in sequence according to the stacking order of 90°-0°-90°-0°, and the total thickness of the prepreg after winding is 1.5-1.6 mm.

4. The method for manufacturing a Bluetooth speaker housing using a basalt fiber composite material according to claim 1, characterized in that: The set temperature of the mold in S3 is 140°C to 170°C.

5. The method for manufacturing a Bluetooth speaker housing using a basalt fiber composite material according to claim 1, characterized in that: In S4, the setting time is 10 to 15 minutes. During this process, the epoxy resin is cured, the shell is hot-pressed, and the mold opening temperature is 50 to 60°C.

6. The method for manufacturing a Bluetooth speaker housing using a basalt fiber composite material according to claim 1, characterized in that: The appearance treatment of the shell surface in S7 includes spraying treatment or NCVM treatment.

7. A product, characterized in that The product is a product produced by the method for manufacturing a Bluetooth speaker shell with a basalt fiber composite material according to any one of claims 1 to 6.

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