A speaker housing and 3D printing manufacturing process thereof

Abstract

The present invention relates to the field of speaker manufacturing and 3D printing technology, and specifically to a speaker shell and its 3D printing manufacturing process. A group of through holes are distributed on the speaker shell, and one or both sides of the through holes are in the shape of a trumpet, and the cross-section of the trumpet wall is two inclined straight lines, and the angle between the inclined straight lines and the normal line of the shell surface is in the range of 30-60°; the wall thickness of the speaker shell is ≥1mm, and the minimum diameter of the through hole is in the range of 0.6mm-1mm; the speaker shell is printed by SLS process. Experimental studies have shown that under the limitation of the same SLS printer accuracy, the speaker shell printed according to the above standards has better hole roundness and a smoother surface.

Description

Technical Field

[0001] The present invention relates to the technical field of speaker manufacturing and 3D printing, and in particular to a speaker shell and a 3D printing manufacturing process thereof. Background Art

[0002] The speaker shell is one of the essential parts of the speaker. The shells of existing speaker equipment are mostly porous structures, and most of them are formed by metal stamping and welding. The processing steps are cumbersome and the cost is high. Compared with traditional methods, 3D printing has advantages such as customization and printable complex structure one-piece molding. However, limited by the current development level of 3D printing technology (such as selective laser sintering molding technology SLS), the molding precision of small apertures is not high, and the speaker shell requires a small and round aperture, otherwise the internal structure will be exposed and unsightly. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, the majority of technical personnel have long been committed to improving 3D printing technology, such as improving process parameters and optimizing raw material formulas, but progress has been slow and it is still difficult to meet the actual use needs. The present invention takes a different approach and studies the intrinsic relationship between the hole structure and the SLS molding effect from the perspective of structural design, thereby designing a speaker shell structure that is easy to print with high precision specifically for SLS printing technology, so that holes with better roundness and smoother surfaces can be punched under the conditions of the same SLS printer precision and the same minimum inner diameter, reducing the processing difficulty, thereby promoting the application of 3D technology in the industrial manufacturing of speaker shells.

[0004] A speaker shell, with a group of through holes distributed on the shell, one or both sides of the through holes are in the shape of a bell mouth, the cross section of the bell mouth wall is two inclined straight lines, the angle between the inclined straight lines and the normal line of the shell surface is in the range of 30-60°; the wall thickness of the speaker shell is ≥1mm, and the minimum diameter of the through holes is in the range of 0.6mm-1mm; the speaker shell is printed by SLS process. Experimental research shows that under the limitation of the same SLS printer accuracy, the speaker shell printed according to the above standards has better hole roundness and smoother surface.

[0005] Furthermore, the above-mentioned speaker housing is preferably made of thermoplastic material as raw material through SLS printing. The thermoplastic material is preferably a thermoplastic material with a particle size of hundreds of microns, and the sintering molding temperature is preferably 170°C.

[0006] Furthermore, in the above-mentioned speaker housing, the through holes are distributed on the speaker housing in a rectangular array.

[0007] Furthermore, in the above-mentioned speaker housing, each of the through holes has the same shape and size.

[0008] Furthermore, the speaker housing mentioned above has an inner wall integrally provided with reinforcing ribs, and the reinforcing ribs are preferably distributed in a rectangular grid shape.

[0009] Beneficial effects:

[0010] (1) The present invention provides a series of hole structures that are easy to print with high precision by SLS, and a speaker shell is manufactured on this basis, so that holes with better roundness and smoother surface can be punched under the conditions of the same printer precision and the same minimum inner diameter, thereby giving full play to the advantages of 3D printing and obtaining a speaker shell that meets the requirements through SLS technology.

[0011] (2) The inner wall of the speaker housing is designed with reinforcing ribs, which can obtain a speaker housing with thin wall thickness and good rigidity and reduce the cost of raw materials.

[0012] (3) One or both sides of the through hole are designed to be flared, which not only takes into account the appearance design requirements of the speaker, but also helps to improve the sound playback effect and can obtain more delicate sound playback than a straight hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of the overall shape of the speaker housing.

[0014] Figure 2 Schematic diagram of the reinforcement rib.

[0015] Figure 3 Design and micrographs of the samples.

[0016] Figure 4 This is a physical picture of the sample. DETAILED DESCRIPTION

[0017] The present invention is further illustrated by specific examples below. These examples are exemplary and are intended to illustrate the problem and explain the present invention, but are not intended to be limiting.

[0018] Example 1

[0019] A speaker housing and a 3D printing manufacturing process thereof.

[0020] (1) Design a hole profile structure, in which the angle between the horizontal hole plane and the vertical hole wall is 30°, and the wall thickness of the speaker shell is 2 mm. The designed structure can be imported into a 3D printer for printing.

[0021] (2) The 3D printer uses an SLS selective laser sintering printer.

[0022] (3) The 3D printing of the speaker shell uses SLS selective laser sintering technology. The printing material is thermoplastic material. The laser is used to scan and irradiate the powder layer by layer under the control of a computer to achieve sintering and bonding of the thermoplastic material, and the molding is achieved by stacking layer by layer.

[0023] (4) The thermoplastic material used in the 3D printed speaker housing is a powder with a particle size of 100 microns, and the sintering temperature of the nylon material is 170° C. The particle size and molding temperature of the thermoplastic material described above are all possible ones used in the present invention, and the particle size and molding temperature of the nylon used in the 3D printed speaker housing include but are not limited to the above possibilities.

[0024] (5) Take the product out of the printer and clean the powder on the surface of the product.

[0025] (6) Place the product under a microscope to observe and measure the roundness of the holes.

[0026] Example 2

[0027] (1) Design a hole profile structure in which the angle between the horizontal hole plane and the vertical hole wall is 45° and the wall thickness of the speaker shell is 2 mm. The designed structure can be imported into a 3D printer for printing.

[0028] (2) The 3D printer uses an SLS selective laser sintering printer.

[0029] (3) The 3D printing of the speaker shell uses SLS selective laser sintering technology. The printing material is thermoplastic material. The laser is used to scan and irradiate the powder layer by layer under the control of a computer to achieve sintering and bonding of the thermoplastic material, and the molding is achieved by stacking layer by layer.

[0030] (4) The thermoplastic material used in the 3D printed speaker housing is a powder with a particle size of 100 microns, and the sintering temperature of the nylon material is 170° C. The particle size and molding temperature of the thermoplastic material described above are all possible ones used in the present invention, and the particle size and molding temperature of the nylon used in the 3D printed speaker housing include but are not limited to the above possibilities.

[0031] (5) Take the product out of the printer and clean the powder on the surface of the product.

[0032] (6) Place the product under a microscope to observe and measure the roundness of the holes.

[0033] Example 3

[0034] (1) Design a hole profile structure in which the angle between the horizontal hole plane and the vertical hole wall is 60° and the wall thickness of the speaker shell is 2 mm. The designed structure can be imported into a 3D printer for printing.

[0035] (2) The 3D printer uses an SLS selective laser sintering printer.

[0036] (3) The 3D printing of the speaker shell uses SLS selective laser sintering technology. The printing material is thermoplastic material. The laser is used to scan and irradiate the powder layer by layer under the control of a computer to achieve sintering and bonding of the thermoplastic material, and the molding is achieved by stacking layer by layer.

[0037] (4) The thermoplastic material used in the 3D printed speaker housing is a powder with a particle size of 100 microns, and the sintering temperature of the nylon material is 170° C. The particle size and molding temperature of the thermoplastic material described above are all possible ones used in the present invention, and the particle size and molding temperature of the nylon used in the 3D printed speaker housing include but are not limited to the above possibilities.

[0038] (5) Take the product out of the printer and clean the powder on the surface of the product.

[0039] (6) Place the product under a microscope to observe and measure the roundness of the holes.

[0040] Comparative Example 1

[0041] (1) Design a speaker housing with a circular through hole of the same diameter of 1 mm and a wall thickness of 1 mm, and import the designed structure into a 3D printer for printing.

[0042] (2) The 3D printer uses an SLS selective laser sintering printer.

[0043] (3) The 3D printing of the speaker shell uses SLS selective laser sintering technology. The printing material is thermoplastic material. The laser is used to scan and irradiate the powder layer by layer under the control of a computer to achieve sintering and bonding of the thermoplastic material, and the molding is achieved by stacking layer by layer.

[0044] (4) The thermoplastic material used in the 3D printed mesh structure is a powder with a particle size of 100 microns, and the sintering temperature of the nylon material is 170° C. The particle size and molding temperature of the thermoplastic material described above are all possible ones used in the present invention, and the particle size and molding temperature of the nylon used in the 3D printed speaker shell include but are not limited to the above possibilities.

[0045] (5) Take the product out of the printer and clean the powder on the surface of the product.

[0046] (6) Place the product under a microscope to observe and measure the roundness of the through holes.

[0047] Comparative Example 2

[0048] (1) The cross section of the designed hole is a curved surface structure, in which the cross section is y=x, that is, the angle between the horizontal plane of the hole and the vertical hole wall is 45°. The wall thickness of the speaker shell is 1 mm. The designed structure can be imported into a 3D printer for printing.

[0049] (2) The 3D printer uses an SLS selective laser sintering printer.

[0050] (3) The 3D printing of the speaker shell uses SLS selective laser sintering technology. The printing material is thermoplastic material. The laser is used to scan and irradiate the powder layer by layer under the control of a computer to achieve sintering and bonding of the thermoplastic material, and the molding is achieved by stacking layer by layer.

[0051] (4) The thermoplastic material used in the 3D printed mesh structure is a powder with a particle size of 100 microns, and the sintering temperature of the nylon material is 170° C. The particle size and molding temperature of the thermoplastic material described above are all possible ones used in the present invention, and the particle size and molding temperature of the nylon used in the 3D printed speaker shell include but are not limited to the above possibilities.

[0052] (5) Take the product out of the printer and clean the powder on the surface of the product.

[0053] (6) Place the product under a microscope to observe and measure the roundness of the holes.

[0054] Comparative Example 3

[0055] (1) The cross section of the designed hole is a curved surface structure, where the cross section function curve is y = x n , n>1, the wall thickness of the speaker shell is 1mm, and the designed structure can be imported into the 3D printer for printing.

[0056] (2) The 3D printer uses an SLS selective laser sintering printer.

[0057] (3) The 3D printing of the speaker shell uses SLS selective laser sintering technology. The printing material is thermoplastic material. The laser is used to scan and irradiate the powder layer by layer under the control of a computer to achieve sintering and bonding of the thermoplastic material, and the molding is achieved by stacking layer by layer.

[0058] (4) The thermoplastic material used in the 3D printed speaker housing is a powder with a particle size of 100 microns, and the sintering temperature of the nylon material is 170° C. The particle size and molding temperature of the thermoplastic material described above are all possible ones used in the present invention, and the particle size and molding temperature of the nylon used in the 3D printed speaker housing include but are not limited to the above possibilities.

[0059] (5) Take the product out of the printer and clean the powder on the surface of the product.

[0060] (6) Place the product under a microscope to observe and measure the roundness of the holes.

[0061] Comparative Example 4

[0062] (1) The cross section of the designed hole is a curved surface structure, where the cross section function curve is y = x 1 / n, n>1, the wall thickness of the speaker shell is 1mm, and the designed structure can be imported into the 3D printer for printing.

[0063] (2) The 3D printer uses an SLS selective laser sintering printer.

[0064] (3) The 3D printing of the speaker shell uses SLS selective laser sintering technology. The printing material is thermoplastic material. The laser is used to scan and irradiate the powder layer by layer under the control of a computer to achieve sintering and bonding of the thermoplastic material, and the molding is achieved by stacking layer by layer.

[0065] (4) The thermoplastic material used in the 3D printed speaker housing is a powder with a particle size of 100 microns, and the sintering temperature of the nylon material is 170° C. The particle size and molding temperature of the thermoplastic material described above are all possible ones used in the present invention, and the particle size and molding temperature of the nylon used in the 3D printed speaker housing include but are not limited to the above possibilities.

[0066] (5) Take the product out of the printer and clean the powder on the surface of the product.

[0067] (6) Place the product under a microscope to observe and measure the roundness of the holes.

[0068] Comparative Example 5

[0069] (1) Design a hole profile structure in which the angle between the horizontal hole plane and the vertical hole wall is 15° and the wall thickness of the speaker shell is 1 mm. The designed structure can be imported into a 3D printer for printing.

[0070] (2) The 3D printer uses an SLS selective laser sintering printer.

[0071] (3) The 3D printing of the speaker shell uses SLS selective laser sintering technology. The printing material is thermoplastic material. The laser is used to scan and irradiate the powder layer by layer under the control of a computer to achieve sintering and bonding of the thermoplastic material, and the molding is achieved by stacking layer by layer.

[0072] (4) The thermoplastic material used in the 3D printed speaker housing is a powder with a particle size of 100 microns, and the sintering temperature of the nylon material is 170° C. The particle size and molding temperature of the thermoplastic material described above are all possible ones used in the present invention, and the particle size and molding temperature of the nylon used in the 3D printed speaker housing include but are not limited to the above possibilities.

[0073] (5) Take the product out of the printer and clean the powder on the surface of the product.

[0074] (6) Place the product under a microscope to observe and measure the roundness of the holes.

[0075] Comparative Example 6

[0076] (1) Design a hole profile structure, in which the angle between the horizontal hole plane and the vertical hole wall is 20°, and the wall thickness of the speaker shell is 1 mm. The designed structure can be imported into a 3D printer for printing.

[0077] (2) The 3D printer uses an SLS selective laser sintering printer.

[0078] (3) The 3D printing of the speaker shell uses SLS selective laser sintering technology. The printing material is thermoplastic material. The laser is used to scan and irradiate the powder layer by layer under the control of a computer to achieve sintering and bonding of the thermoplastic material, and the molding is achieved by stacking layer by layer.

[0079] (4) The thermoplastic material used in the 3D printed speaker housing is a powder with a particle size of 100 microns, and the sintering temperature of the nylon material is 170° C. The particle size and molding temperature of the thermoplastic material described above are all possible ones used in the present invention, and the particle size and molding temperature of the nylon used in the 3D printed speaker housing include but are not limited to the above possibilities.

[0080] (5) Take the product out of the printer and clean the powder on the surface of the product.

[0081] (6) Place the product under a microscope to observe and measure the roundness of the holes.

[0082] Figure 1 The display shows a style of the overall shape of the speaker housing. Figure 2 The display shows a style of the inner wall reinforcement ribs of the speaker housing. Table 1 summarizes the appearance of the products made in each embodiment and each comparative example. The hole structures designed in each embodiment and each comparative example are summarized in Figure 3 The comparison diagrams of the micrographs and CAD models of the samples prepared in each embodiment and each comparative example are summarized in Figure 3 The third column of FIG. 1 shows the actual hole contour line shown in the micrograph. The two-side physical images of the samples prepared in each embodiment and each comparative example are summarized in FIG. Figure 4 .

[0083] In summary, it can be seen that according to the method of the present invention, a hole and a speaker housing with better overall performance can be obtained.

[0084] Table 1

[0085]

[0086] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A speaker housing having a group of through holes distributed on the housing, characterized in that: One side or both sides of the through hole are in a bell-mouth shape, and the cross section of the bell-mouth wall is two inclined straight lines, and the angle between the inclined straight lines and the normal line of the shell surface is in the range of 30-60°; the wall thickness of the speaker shell is ≥1mm, and the minimum diameter of the through hole is in the range of 0.6mm-1mm; the speaker shell is made of thermoplastic material as raw material by SLS printing; The thermoplastic material has a particle size of 100 micrometers; the sintering temperature is 170°C.

2. The speaker housing according to claim 1, characterized in that: The through holes are distributed on the sound box housing in a rectangular array.

3. The speaker housing according to claim 2, characterized in that: Each of the through holes has the same shape and size.

4. The speaker housing according to claim 3, characterized in that: The inner wall of the speaker housing is also integrally provided with reinforcing ribs, which are distributed in a rectangular grid shape.

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