Metal 3D printing mold

Abstract

The utility model relates to the technical field of silicone rubber product forming, and discloses a metal 3D printing mold, which comprises an outer core assembly, a first feeding channel, a second core assembly, a third core assembly and a fourth core assembly, and is characterized in that the outer core assembly is provided with a containing cavity and is provided with a first feeding channel communicated with the containing cavity and the outside; the inner core assembly is arranged in the containing cavity, a containing space for containing materials is formed between the outer side wall of the inner core assembly and the inner side wall of the outer core assembly, and a second feeding channel communicating with the containing space and the first feeding channel is formed in the inner core assembly and used for conveying the materials into the containing space. Materials are conveyed into the containing space through the first feeding channel and the second feeding channel communicated with the first feeding channel, the materials can be solidified and formed in the containing space, the forming process is simple, and operation is convenient; the second feeding channel communicated with the first feeding channel is arranged on the inner core assembly, materials are cured and formed in the containing space from inside to outside, then the outer surface of a formed product is not affected by the feeding channels, and the outer surface is smoother and more attractive.

Description

Technical Field

[0001] This utility model relates to the field of silicone rubber product molding technology, specifically to a metal 3D printing mold. Background Technology

[0002] Liquid injection molding is a manufacturing process in which liquid silicone rubber material is injected into a mold and then cured by heating. This simple and convenient process is widely used in various fields such as baby products, adult products, and medical devices. However, air bubbles are generated when liquid silicone rubber is injected into the mold. Because the mold is sealed, the gas cannot escape, resulting in a high scrap rate.

[0003] The prior art discloses a silicone mold based on a 3D printed shell, such as Figures 1-2 As shown, the silicone mold includes an upper mold assembly 01 and a lower mold assembly 02. The upper mold assembly 01 and the lower mold assembly 02 are closed to form a mold cavity 03. The upper mold assembly 01 is provided with an injection hole 011 and an evacuation hole 012 that respectively communicate with the mold cavity 03. When injecting raw material, air is evacuated from the mold cavity 03 through the evacuation hole 012, which can increase the fluidity of the raw material during the injection process, avoid the generation of air bubbles, and thus improve product quality.

[0004] However, since the injection hole 011 is located on the upper mold assembly 01, the raw material enters the mold cavity 03 directly from the injection hole 011 for solidification and molding, which will result in an uneven outer surface of the product after molding. Utility Model Content

[0005] In view of this, the present invention provides a metal 3D printing mold to solve the problem that the liquid injection molding process in the prior art causes unevenness on the outer surface of the product after molding.

[0006] This utility model provides a metal 3D printing mold, comprising:

[0007] The outer core assembly has a receiving cavity, and the outer core assembly has a first feeding channel that connects the receiving cavity to the outside.

[0008] An inner core assembly is disposed within the receiving cavity. A material receiving space is formed between the outer sidewall of the inner core assembly and the inner sidewall of the outer core assembly. The inner core assembly is provided with a second feeding channel that connects the receiving space and the first feeding channel for conveying the material into the receiving space.

[0009] Beneficial effects: By using a first feeding channel and a second feeding channel connected to it to transport materials into the accommodating space, the materials can be solidified and formed in the accommodating space. The forming process is simple and easy to operate. By setting a second feeding channel connected to the first feeding channel on the inner core component, the materials are solidified and formed from the inside to the outside in the accommodating space. As a result, the outer surface of the formed product will not be affected by the feeding channel, and the outer surface is smoother and more beautiful.

[0010] In one optional embodiment, the outer core assembly is provided with a through hole connecting the receiving cavity to the outside, and the first feeding channel connects the through hole to the outside.

[0011] The inner core assembly includes:

[0012] A molded part is disposed within the receiving cavity, and the molded part is provided with the second feeding channel;

[0013] A support member is inserted into the through hole and fixedly connected to the molded part. The support member is provided with a third feeding channel that connects the first feeding channel and the second feeding channel.

[0014] Beneficial effects: By setting up support components, the molded parts can be supported, making it easier to suspend and fix the molded parts in the receiving cavity, thus not affecting the product molding effect.

[0015] In one optional embodiment, the outer core assembly is provided with a first snap-fit ​​portion, and the support member is provided with a second snap-fit ​​portion that cooperates with the first snap-fit ​​portion to restrict the rotation of the support member.

[0016] Beneficial effects: By setting the first and second locking parts, when the support is a cylindrical structure, the support can be prevented from rotating in the through hole, thus avoiding affecting the material forming effect.

[0017] In one alternative embodiment, the molded part includes:

[0018] case;

[0019] A support body is disposed inside the housing, and the support body is provided with the second feeding channel.

[0020] Beneficial effect: By setting up a support structure, the structural strength of the shell can be improved.

[0021] In one optional embodiment, the housing is provided with a plurality of vent holes, the support body is provided with a plurality of openings, and the support member is provided with an exhaust channel connecting the internal space of the housing with the outside.

[0022] Beneficial effects: By providing vent holes on the shell, openings on the support body, and exhaust channels on the support components, air bubbles generated when materials are injected into the accommodating space can enter the openings of the support body through the vent holes on the shell and be discharged to the outside through the exhaust channels on the support components, thereby improving product quality.

[0023] In one optional embodiment, the thickness of the housing is 0.5mm-5mm;

[0024] And / or, the size of the vent holes in the housing is 0.01mm-0.2mm;

[0025] And / or, the distance between two adjacent vent holes of the housing is 0.01mm-2mm.

[0026] In one alternative implementation, the outer core assembly and / or the inner core assembly are metal 3D printed structures.

[0027] Beneficial effects: By using metal 3D printing technology to form both the outer core components and / or the inner core components, it is possible to create complex product molds, which have wider applicability and can reduce processing cycle and processing cost.

[0028] In one optional embodiment, the printing parameters of the housing are: laser power of 80W-250W, scanning spacing of 0.05mm-0.15mm, scanning speed of 300mm / s-1500mm / s, printing layer thickness of 0.02mm-0.08mm, scanning rotation angle of 15°-90°, and scanning width of 10mm-275mm;

[0029] And / or, the printing parameters of the support are: laser power of 80W-380W, scanning spacing of 0.05mm-0.12mm, scanning speed of 450mm / s-1500mm / s, printing layer thickness of 0.02mm-0.08mm, scanning rotation angle of 47°-113°, and scanning width of 8mm-20mm;

[0030] And / or, the printing parameters of the support are: laser power of 80W-380W, scanning spacing of 0.05mm-0.12mm, scanning speed of 450mm / s-1500mm / s, printing layer thickness of 0.02mm-0.08mm, scanning rotation angle of 47°-113°, and scanning width of 8mm-20mm.

[0031] Beneficial effects: By limiting the printing parameters of the housing and / or support and / or support components, the structural strength of the housing and / or support and / or support components and the printing accuracy can be improved.

[0032] In one alternative implementation, the outer core assembly includes:

[0033] The first housing has a first groove;

[0034] The second housing has a second groove, which together with the first groove forms the receiving cavity.

[0035] Beneficial effects: By including the first and second housings in the outer core assembly, it is convenient to disassemble and maintain the inner core assembly, and also convenient to demold after the material has solidified and formed.

[0036] In one optional embodiment, the first housing is provided with a third latching portion, and the second housing is provided with a fourth latching portion that cooperates with the third latching portion, for limiting the relative movement between the first housing and the second housing.

[0037] Beneficial effects: By setting the third and fourth locking parts, relative movement between the first and second shells can be avoided during the material curing process, thus preventing any impact on product quality. Attached Figure Description

[0038] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the structure of a silicone mold based on a 3D printed shell, according to existing technology.

[0040] Figure 2 for Figure 1 The image shows a cross-sectional view of a silicone mold based on a 3D-printed shell.

[0041] Figure 3 This is a schematic diagram of the structure of a metal 3D printing mold according to an embodiment of the present utility model;

[0042] Figure 4 for Figure 3 An exploded view of the metal 3D printed mold shown.

[0043] Figure 5 for Figure 3 The cross-sectional view of the metal 3D printed mold shown.

[0044] Explanation of reference numerals in the attached figures:

[0045] 01. Upper mold assembly; 011. Injection hole; 012. Air extraction hole; 02. Lower mold assembly; 03. Mold cavity;

[0046] 1. Outer core assembly; 11. Receiving cavity; 12. First feeding channel; 13. Through hole; 14. First snap-fit ​​part; 15. First housing; 151. Third snap-fit ​​part; 16. Second housing; 161. Fourth snap-fit ​​part; 2. Inner core assembly; 21. Second feeding channel; 22. Molded part; 221. Housing; 222. Support body; 23. Support member; 231. Third feeding channel; 232. Second snap-fit ​​part; 233. Exhaust channel; 3. Accommodation space. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0048] The following is combined with Figures 3 to 5 The following describes embodiments of the present invention.

[0049] According to an embodiment of the present invention, a metal 3D printing mold is provided, comprising: an outer core assembly 1 having a receiving cavity 11, and a first feeding channel 12 on the outer core assembly 1 communicating with the receiving cavity 11 and the outside; an inner core assembly 2 disposed within the receiving cavity 11, wherein a material-containing space 3 is formed between the outer side wall of the inner core assembly 2 and the inner side wall of the outer core assembly 1, and a second feeding channel 21 on the inner core assembly 2 communicating with the material-containing space 3 and the first feeding channel 12 for conveying material into the material-containing space 3.

[0050] By using the first feeding channel 12 and the second feeding channel 21 connected to it to transport materials into the accommodating space 3, the materials can be solidified and formed in the accommodating space 3. The forming process is simple and easy to operate. By setting the second feeding channel 21 connected to the first feeding channel 12 on the inner core component 2, the materials are solidified and formed from the inside to the outside in the accommodating space 3. As a result, the outer surface of the formed product will not be affected by the feeding channel, and the outer surface is more flat and beautiful.

[0051] In one embodiment, the material is liquid silicone rubber. As an alternative implementation, the material may also be liquid silicone, liquid rubber, or other liquid materials; no further limitations are imposed here.

[0052] In another embodiment, the first feeding channel 12 connects the accommodating space 3 to the outside, and the inner core component 2 does not have a second feeding channel 21.

[0053] like Figures 4-5 As shown, in one embodiment, the outer core assembly 1 includes: a first housing 15 with a first groove; and a second housing 16 with a second groove, the second groove and the first groove forming a receiving cavity 11. By including the first housing 15 and the second housing 16 in the outer core assembly 1, it is convenient to disassemble and maintain the inner core assembly 2, and also convenient to demold after the material has solidified and formed. As a variant implementation, the outer core assembly 1 may also be formed by three or four housings, without further limitation.

[0054] like Figure 4 As shown, in one embodiment, the first housing 15 is provided with a third engaging portion 151, and the second housing 16 is provided with a fourth engaging portion 161 that cooperates with the third engaging portion 151, for limiting the relative movement between the first housing 15 and the second housing 16. The third engaging portion 151 is a recess, and the fourth engaging portion 161 is a protrusion. There are four sets of protrusions and recesses, respectively located at the four corners of the first housing 15 and the second housing 16. By providing the third engaging portion 151 and the fourth engaging portion 161, relative movement between the first housing 15 and the second housing 16 can be avoided during the material curing process, thus preventing any impact on product quality. Alternatively, the first housing 15 and the second housing 16 can be bolted together or magnetically connected. Alternatively, the third engaging portion 151 can be a protrusion, and the fourth engaging portion 161 can be a recess. Alternatively, there can be two or six sets of protrusions and recesses; no further limitations are imposed here.

[0055] like Figure 5As shown, in one embodiment, the outer core assembly 1 has a through hole 13 connecting the receiving cavity 11 to the outside, and a first feeding channel 12 connects the through hole 13 to the outside; the inner core assembly 2 includes: a molded part 22 disposed in the receiving cavity 11, and a second feeding channel 21 disposed on the molded part 22; a support member 23 passing through the through hole 13 and fixedly connected to the molded part 22, and a third feeding channel 231 connecting the first feeding channel 12 and the second feeding channel 21. The molded part 22 and the support member 23 both have circular cross-sections, and the through hole 13 also has a circular cross-section. By providing the support member 23, the molded part 22 can be supported, making it easy to suspend and fix the molded part 22 in the receiving cavity 11, thus not affecting the product molding effect. As an alternative implementation, the cross-sections of the molding part 22 and the support part 23 can be square or triangular or other shapes, and the cross-section of the through hole 13 can also be set to square or triangular or other shapes. The specific cross-sectional shapes of the molding part 22 and the support part 23 are set according to the shape of the product, and no further restrictions are imposed here.

[0056] like Figure 5 As shown, in one embodiment, the molded part 22 includes: a shell 221; and a support 222 disposed within the shell 221, the support 222 having a second feeding channel 21. By providing the support 222, the structural strength of the shell 221 can be improved. As an alternative implementation, the support 222 may be omitted, and instead, the thickness of the shell 221 may be increased or the shell 221 may be made into a solid structure to improve its structural strength.

[0057] like Figure 5 As shown, in one embodiment, the housing 221 has multiple vent holes, the support 222 has multiple openings, and the support member 23 has an exhaust channel 233 connecting the internal space of the housing 221 to the outside. By providing vent holes on the housing 221, openings on the support 222, and an exhaust channel 233 on the support member 23, air bubbles generated when material is injected into the accommodating space 3 can enter the openings of the support 222 through the vent holes on the housing 221 and be discharged to the outside through the exhaust channel 233 on the support member 23, thereby improving product quality. Alternatively, the exhaust channel 233 can be directly provided on the first housing 15 or the second housing 16; no further restrictions are imposed here.

[0058] In one embodiment, the thickness of the housing 221 is 0.5mm-5mm; the size of the vent holes in the housing 221 is 0.01mm-0.2mm; the distance between two adjacent vent holes in the housing 221 is 0.01mm-2mm; the support 222 is composed of multiple intersecting connecting strips, with openings spaced apart between adjacent connecting strips, the width of the connecting strips is 0.4mm-1mm, and the distance between two adjacent connecting strips is 0.5mm-5mm. As an alternative embodiment, the thickness of the housing 221 can also be 0.4mm or 5.1mm, without further limitation. As an alternative embodiment, the size of the vent holes in the housing 221 can also be 0.21mm, without further limitation. As an alternative embodiment, the distance between two adjacent vent holes in the housing 221 can also be 2.1mm, without further limitation. As an alternative embodiment, the support 222 can also be formed by a column with multiple openings, without further limitation. As an alternative implementation, the width of the connecting strip can be 0.3mm or 1.1mm, without further restrictions. As an alternative implementation, the distance between two adjacent connecting strips can be 0.4mm or 5.1mm, without further restrictions.

[0059] like Figure 5 As shown, in one embodiment, the outer core assembly 1 is provided with a first latching portion 14, and the support member 23 is provided with a second latching portion 232 that cooperates with the first latching portion 14 to restrict the rotation of the support member 23. The first latching portion 14 is a groove, and the second latching portion 232 is a protrusion. By providing the first latching portion 14 and the second latching portion 232, when the support member 23 has a cylindrical structure, rotation of the support member 23 within the through hole 13 can be prevented, thus avoiding interference with the material forming effect. Alternatively, when the cross-section of the support member 23 is square or triangular, the first latching portion 14 and the second latching portion 232 may not be provided. Alternatively, the first latching portion 14 may be a protrusion, and the second latching portion 232 may be a groove; no further restrictions are imposed here.

[0060] In one embodiment, the outer core component 1 and the inner core component 2 are metal 3D printed structures. By using metal 3D printing technology to form both the outer core component 1 and the inner core component 2, complex product molds can be manufactured, making the product more versatile and reducing processing time and costs. As an alternative implementation, the outer core component 1 can be machined while the inner core component 2 is 3D printed; alternatively, the outer core component 1 can be 3D printed while the inner core component 2 is machined; or both the outer core component 1 and the inner core component 2 can be machined. No further limitations are imposed here.

[0061] In one embodiment, the printing parameters of the housing 221 are: laser power of 80W-250W, scanning spacing of 0.05mm-0.15mm, scanning speed of 300mm / s-1500mm / s, printing layer thickness of 0.02mm-0.08mm, scanning rotation angle of 15°-90°, and scanning width of 10mm-275mm; the printing parameters of the support 222 and support member 23 are: laser power of 80W-380W, scanning spacing of 0.05mm-0.12mm, scanning speed of 450mm / s-1500mm / s, printing layer thickness of 0.02mm-0.08mm, scanning rotation angle of 47°-113°, and scanning width of 8mm-20mm. Specifically, the printing parameters for the housing 221 are: laser power of 230W, scanning spacing of 0.15mm, scanning speed of 920mm / s, printing layer thickness of 0.04mm, scanning rotation angle of 90°, and scanning width of 10mm; the printing parameters for the support 222 and support member 23 are: laser power of 320W, scanning spacing of 0.11mm, scanning speed of 890mm / s, printing layer thickness of 0.04mm, scanning rotation angle of 67°, and scanning width of 10mm. By limiting the printing parameters of the housing 221, support 222, and support member 23, the structural strength and printing accuracy of the housing 221, support 222, and support member 23 can be improved.

[0062] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A metal 3D printing mold, characterized in that, include: The outer core assembly (1) is provided with a receiving cavity (11), and the outer core assembly (1) is provided with a first feeding channel (12) connecting the receiving cavity (11) with the outside world; The inner core assembly (2) is disposed in the receiving cavity (11). The outer side wall of the inner core assembly (2) and the inner side wall of the outer core assembly (1) form a receiving space (3) for receiving materials. The inner core assembly (2) is provided with a second feeding channel (21) connecting the receiving space (3) and the first feeding channel (12) for conveying the material into the receiving space (3).

2. The metal 3D printing mold according to claim 1, characterized in that, The outer core assembly (1) is provided with a through hole (13) connecting the receiving cavity (11) to the outside, and the first feeding channel (12) connects the through hole (13) to the outside; The inner core assembly (2) includes: A molded part (22) is disposed in the receiving cavity (11), and the molded part (22) is provided with the second feeding channel (21); The support member (23) is inserted into the through hole (13) and fixedly connected to the molded part (22). The support member (23) is provided with a third feeding channel (231) that connects the first feeding channel (12) and the second feeding channel (21).

3. The metal 3D printing mold according to claim 2, characterized in that, The outer core assembly (1) is provided with a first snap-fit ​​part (14), and the support member (23) is provided with a second snap-fit ​​part (232) that cooperates with the first snap-fit ​​part (14) to restrict the rotation of the support member (23).

4. The metal 3D printing mold according to claim 2, characterized in that, The molded part (22) includes: Shell (221); A support body (222) is disposed inside the housing (221), and the support body (222) is provided with the second feeding channel (21).

5. The metal 3D printing mold according to claim 4, characterized in that, The housing (221) is provided with multiple vent holes, the support (222) is provided with multiple openings, and the support member (23) is provided with an exhaust channel (233) connecting the internal space of the housing (221) with the outside.

6. The metal 3D printing mold according to claim 5, characterized in that, The thickness of the shell (221) is 0.5mm-5mm; And / or, the size of the vent holes in the housing (221) is 0.01mm-0.2mm; And / or, the distance between two adjacent vent holes of the housing (221) is 0.01mm-2mm.

7. The metal 3D printing mold according to claim 4, characterized in that, The outer core assembly (1) and / or the inner core assembly (2) are metal 3D printed structures.

8. The metal 3D printing mold according to claim 7, characterized in that, The printing parameters of the housing (221) are as follows: laser power of 80W-250W, scanning spacing of 0.05mm-0.15mm, scanning speed of 300mm / s-1500mm / s, printing layer thickness of 0.02mm-0.08mm, scanning rotation angle of 15°-90°, and scanning width of 10mm-275mm; And / or, the printing parameters of the support (222) are: laser power of 80W-380W, scanning spacing of 0.05mm-0.12mm, scanning speed of 450mm / s-1500mm / s, printing layer thickness of 0.02mm-0.08mm, scanning rotation angle of 47°-113°, and scanning width of 8mm-20mm; And / or, the printing parameters of the support (23) are: laser power of 80W-380W, scanning spacing of 0.05mm-0.12mm, scanning speed of 450mm / s-1500mm / s, printing layer thickness of 0.02mm-0.08mm, scanning rotation angle of 47°-113°, and scanning width of 8mm-20mm.

9. The metal 3D printing mold according to any one of claims 1 to 8, characterized in that, The outer core assembly (1) includes: The first housing (15) is provided with a first groove; The second housing (16) is provided with a second groove, which together with the first groove forms the receiving cavity (11).

10. The metal 3D printing mold according to claim 9, characterized in that, The first housing (15) is provided with a third latching part (151), and the second housing (16) is provided with a fourth latching part (161) that cooperates with the third latching part (151) to restrict the relative movement between the first housing (15) and the second housing (16).

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