A zero radius injection mold

Abstract

This invention proposes a zero-radius injection mold. By optimizing the internal structure of the upper and lower mold plates and the molding block, a precise triangular molding cavity is formed, achieving zero-radius molding of the product. This improves the consistency of product dimensions and structural stability. By having the gating and stripping components cooperate with the molding components respectively, the flow path of plastic in the mold cavity is optimized, reducing flow resistance and air entrapment, thereby improving product quality and production efficiency. This solves the problem that current triangular mold cavities cannot achieve a zero-radius effect.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to a zero radius injection mold. Background Technology

[0002] Injection molds are tools used to produce plastic products. Molten plastic is injected into the cavity of the mold under high temperature and pressure, and after cooling, a plastic product of a specific shape is obtained.

[0003] For certain speaker enclosures or heat dissipation products, a triangular shape is required. Due to the involvement of multiple angles and curved surfaces, the mold cavities for manufacturing triangular shapes are typically quite complex. However, in traditional mold processing, the radius (R) of the mold cavity is difficult to control precisely, resulting in inconsistent R-angle sizes on the edges of the molded triangular products, making it impossible to achieve a zero-R-angle effect. This not only affects the product's appearance quality but may also lead to air entrapment and the formation of internal air bubbles, reducing product yield. Utility Model Content

[0004] The purpose of this invention is to provide a zero-radius injection mold, which solves the problem that current triangular mold cavities cannot achieve the effect of zero-radius angles.

[0005] This utility model is achieved by the following technical solution:

[0006] A zero radius injection mold includes a molding component disposed between an upper mold component and a lower mold component. The molding component includes an upper template and a lower template. A molding block is disposed between the upper template and the lower template. The upper template, the molding block, and the lower template form a triangular molding cavity for zero radius molding.

[0007] As described above, in a zero-radius injection mold, the molding block includes a first molding surface for zero-radius molding and a first inclined surface and a second inclined surface for connection. The first molding surface is provided with a plurality of molding holes for zero-radius molding.

[0008] As described above, in a zero-radius injection mold, the first molding surface is further provided with a plurality of first connecting grooves that connect with the upper template; both the first inclined surface and the second inclined surface are provided with a plurality of second connecting grooves that connect with the upper template.

[0009] As described above, in a zero-radius injection mold, the first molding surface is further provided with a first connector and a second connector that are connected to the lower template; both the first inclined surface and the second inclined surface are provided with a third connector that is connected to the lower template.

[0010] As described above, in a zero-radius injection mold, the upper mold plate is provided with a second molding surface that abuts against the first molding surface, and a third and fourth inclined surfaces that are respectively connected to the first inclined surface and the second inclined surface.

[0011] As described above, in a zero-radius injection mold, the second molding surface is provided with a first protrusion that abuts against the molding hole and a second protrusion that connects to the first connecting groove; both the third inclined surface and the fourth inclined surface are provided with a third protrusion that connects to the second connecting groove.

[0012] As described above, in a zero-radius injection mold, the lower mold plate has a third molding surface that abuts against the first molding surface, and a fifth and a sixth inclined surface that are respectively connected to the first inclined surface and the second inclined surface.

[0013] As described above, in a zero-radius injection mold, the third molding surface is provided with a fourth protrusion that abuts against the molding hole; both the fifth inclined surface and the sixth inclined surface are provided with a third connecting groove that connects to the third connecting member.

[0014] As described above, in a zero-radius injection mold, the lower mold plate is further provided with a fourth connecting groove connected to the first connecting member and a fifth connecting groove connected to the second connecting member.

[0015] As described above, in a zero-radius injection mold, the upper mold assembly is connected to a gating assembly, which penetrates the upper mold plate and is connected to the lower mold plate; the lower mold assembly is connected to a stripping assembly, which penetrates the lower mold plate and abuts against the molding block.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] This invention proposes a zero-radius (R) angle injection mold. First, the combination of an upper mold plate, a lower mold plate, and a molding block achieves zero-radius (R) angle molding of the product. Second, the first molding surface of the molding block, with multiple molding holes, closely abuts against the second molding surface of the upper mold plate and the third molding surface of the lower mold plate, forming a triangular molding cavity. This ensures precise zero-radius molding of the product, improving dimensional consistency and structural stability. Third, the gating and stripping components, respectively, cooperate with the molding components to optimize the flow path of the plastic in the mold cavity, reducing flow resistance and air entrapment, thereby improving product quality and production efficiency.

[0018] This utility model of zero-radius injection mold optimizes the internal structure of the upper and lower mold plates and the molding block to form a precise triangular molding cavity, achieving zero-radius molding of the product, improving product dimensional consistency and structural stability. By having the gating component and the stripping component cooperate with the molding component respectively, the flow path of plastic in the mold cavity is optimized, reducing flow resistance and air entrapment, improving product quality and production efficiency, and solving the problem that current triangular mold cavities cannot achieve zero-radius effect. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present utility model;

[0020] Figure 2 Disassembly of the molding component of this utility model Figure 1 ;

[0021] Figure 3 for Figure 2 Enlarged view at point -b;

[0022] Figure 4 for Figure 2 Enlarged view at point -a;

[0023] Figure 5 Disassembly of the molding component of this utility model Figure 2 ;

[0024] Figure 6 for Figure 5 Enlarged view at -c;

[0025] Figure 7 This is a top view of the present invention;

[0026] Figure 8 for Figure 7 Cross-sectional view at point AA;

[0027] Figure 9 for Figure 8 Enlarged view of the -d section. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-9 The present invention will be further described in detail with reference to the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0029] Figure 1-9The zero radius injection mold shown includes a molding component 3 disposed between an upper mold component 1 and a lower mold component 6. The molding component 3 includes an upper template 31 and a lower template 33. A molding block 32 is provided between the upper template 31 and the lower template 33. The upper template 31, the molding block 32 and the lower template 33 form a triangular molding cavity for zero radius molding.

[0030] In this implementation, an overall framework is provided by upper and lower mold components, and product molding is achieved through molding components. Specifically, the molding components support and fix the molding block through upper and lower mold plates. The molding block fits tightly with the upper and lower mold plates to form a triangular molding cavity, ensuring the consistency and precision of the product's edges and corners. After injection molding and cooling, a molded product with a three-dimensional appearance and zero radius corners is obtained.

[0031] Furthermore, the molding block 32 includes a first molding surface 321 for zero radius molding and a first inclined surface 322 and a second inclined surface 323 for connection. The first molding surface 321 is provided with a plurality of molding holes 3211 for zero radius molding.

[0032] Specifically, the molding hole 3211 is a zero-radius triangle. The zero-radius triangle can be specifically configured according to product requirements. Preferably, a zero-radius triangle with a bone width of 1.2mm and a height of 1.5mm is used.

[0033] In this implementation, the molding block adopts a partitioned design with molding surfaces and inclined surfaces. Zero-radius (R-angle) molding is achieved through the molding surfaces, while the inclined surfaces facilitate a tight connection with the upper and lower templates, enhancing connection reliability and structural stability. This strengthens the multi-functional integration of the molding block and optimizes the internal structural space of the molding assembly. Furthermore, multiple molding holes on the first molding surface abut against the upper and lower templates, forming multiple triangular molding cavities for zero-radius molding, improving dimensional accuracy and consistency.

[0034] Furthermore, the first forming surface 321 is also provided with a plurality of first connecting grooves 3212 connected to the upper template 31; the first inclined surface 322 and the second inclined surface 323 are both provided with a plurality of second connecting grooves 3220 connected to the upper template 31.

[0035] Specifically, both the first connecting groove 3212 and the second connecting groove 3220 are triangular in shape.

[0036] In this embodiment, by setting the first connecting groove and the second connecting groove on the forming surface and the front of the inclined surface, multi-point connection between the forming block and the upper template is achieved, which increases the contact area and mechanical interlocking of the connection, thereby enhancing the strength and stability of the connection.

[0037] Furthermore, the first forming surface 321 is also provided with a first connector 3213 and a second connector 3214 connected to the lower template 33; the first inclined surface 322 and the second inclined surface 323 are both provided with a third connector 3230 connected to the lower template 33.

[0038] In this implementation, by setting a first connector, a second connector, and a third connector on the molding surface and the bottom of the inclined surface, multi-point connections between the molding block and the lower mold plate are achieved, increasing the contact area and mechanical interlocking, thereby enhancing the strength and stability of the connection. Secondly, by rationally utilizing the front and back surfaces of the molding block and optimizing the structural layout of the connecting groove and connectors, the space utilization rate of the internal structure of the molding component is improved, while simultaneously enhancing the sealing performance at the connection between the molding block and the upper and lower mold plates, ensuring the smooth progress of the injection molding process.

[0039] Furthermore, the upper template 31 is provided with a second forming surface 311 that abuts against the first forming surface 321, and a third inclined surface 312 and a fourth inclined surface 313 that are respectively connected to the first inclined surface 322 and the second inclined surface 323.

[0040] In this implementation, the first forming surface and the second forming surface abut together to form a triangular forming cavity. The third and fourth inclined surfaces enable multi-faceted connection between the upper template and the forming block, providing a precise positioning reference, ensuring correct assembly between the two, improving the assembly accuracy of the mold, and reducing dimensional deviations and quality fluctuations.

[0041] Furthermore, the second molding surface 311 is provided with a first protrusion 3111 that abuts against the molding hole 3211 and a second protrusion 3112 that connects to the first connecting groove 3212; the third inclined surface 312 and the fourth inclined surface 313 are both provided with a third protrusion 3130 that connects to the second connecting groove 3220.

[0042] Specifically, the first protrusion 3111, the second protrusion 3112 and the third protrusion 3130 are all triangular in shape, and match the shapes of the first connecting groove 3212 and the second connecting groove 3220.

[0043] In this embodiment, the first protrusion abuts against the forming hole to jointly form a triangular forming cavity. The second protrusion and the first connecting groove, and the third protrusion and the second connecting groove cooperate to form a mechanical interlocking structure, reducing stress concentration and enhancing connection strength and stability.

[0044] Furthermore, the lower template 33 is provided with a third forming surface 331 that abuts against the first forming surface 321, and a fifth inclined surface 332 and a sixth inclined surface 333 that are respectively connected to the first inclined surface 322 and the second inclined surface 323.

[0045] In this implementation, the first and third forming surfaces abut against each other to jointly form a triangular forming cavity. The fifth and sixth inclined surfaces achieve multi-faceted connection between the lower template and the forming block, providing a precise positioning reference, ensuring correct assembly, improving mold assembly accuracy, and reducing dimensional deviations and quality fluctuations. Secondly, the mutual cooperation of the forming surfaces and inclined surfaces of the upper template, forming block, and lower template forms a tightly fitted triangular forming cavity, ensuring zero-radius forming quality of the product. Finally, the external interlocking of the lower and upper templates ensures the overall stability and reliability of the forming assembly.

[0046] Furthermore, the third forming surface 331 is provided with a fourth protrusion 3311 that abuts against the forming hole 3211; the fifth inclined surface 332 and the sixth inclined surface 333 are both provided with a third connecting groove 3312 that connects to the third connecting member 3230.

[0047] Specifically, the fourth protrusion 3311 is triangular and matches the shape of the forming hole 3211.

[0048] In this embodiment, the fourth protrusion abuts against the forming hole to jointly form a triangular forming cavity. The third connecting groove is connected to the third connecting piece to achieve a tight connection between the lower template and the forming block, preventing loosening and misalignment.

[0049] Furthermore, the lower template 33 is also provided with a fourth connecting groove 3313 connected to the first connecting member 3213, and a fifth connecting groove 3314 connected to the second connecting member 3214.

[0050] In this embodiment, the fourth connecting groove is connected to the first connecting piece, and the fifth connecting groove is connected to the second connecting piece, so as to achieve a multi-point tight connection between the lower template and the forming block and prevent loosening and misalignment.

[0051] Furthermore, the upper molding component 1 is connected to a casting component 2, which penetrates the upper mold 31 and is connected to the lower mold 33; the lower molding component 6 is connected to a stripping component 4, which penetrates the lower mold 33 and abuts against the molding block 32.

[0052] The casting assembly 2 includes a casting port 21, a main channel 22 that communicates with the casting port 21 and passes through the upper mold plate 31, a branch channel 23 that communicates with the main channel 22 and passes through the lower mold plate 33, and a feed port 24 that communicates with the branch channel 23 and is connected to the lower mold plate 33.

[0053] The stripping assembly 4 includes a plurality of ejector pins 41 that penetrate the lower template 33 and abut against the forming block 32. Specifically, the ejector pins 41 are located at the intersection of the corners of the forming hole 3211.

[0054] The upper template 31 is provided with a first receiving groove 310 for accommodating the diversion channel 23.

[0055] The lower template 33 is provided with a second receiving groove 330 for accommodating the flow channel 23, a third receiving groove 331 for accommodating the feed inlet 24, and a plurality of fixing holes 410 for fixing the ejector pin 41.

[0056] In this implementation, by having the casting component and the stripping component work together with the molding component, the flow path of plastic in the mold cavity is optimized, flow resistance and air entrapment are reduced, and product quality and production efficiency are improved.

[0057] When this utility model is used, plastic is injected from the pouring port 21, and it flows sequentially through the main channel 22 and the branch channel 23. It then flows from the feed port 24 into the multiple forming holes 3211 of the molding block 32 from the lower mold plate 33. With the cooperation of the second forming surface 311 of the upper mold plate 31 and the third forming surface 331 of the lower mold plate 33, a closed triangular forming cavity is formed with the forming holes 3211. After the plastic cools, a molded product with a three-dimensional appearance effect with zero R-angle is obtained.

[0058] This utility model of zero-radius injection mold optimizes the internal structure of the upper and lower mold plates and the molding block to form a precise triangular molding cavity, achieving zero-radius molding of the product, improving product dimensional consistency and structural stability. By having the gating component and the stripping component cooperate with the molding component respectively, the flow path of plastic in the mold cavity is optimized, reducing flow resistance and air entrapment, improving product quality and production efficiency, and solving the problem that current triangular mold cavities cannot achieve zero-radius effect.

[0059] The above description describes the implementation methods in conjunction with specific content, and does not imply that the specific implementation of this utility model is limited to these descriptions. Furthermore, due to differences in industry naming conventions, it is not limited to the above names or the English names. Any methods or structures that are similar to or identical to those of this utility model, or any technical deductions or substitutions made based on the concept of this utility model, should be considered within the scope of protection of this utility model.

Claims

1. A zero-radius injection mold, comprising a molding component (3) disposed between an upper mold component (1) and a lower mold component (6), characterized in that: The molding component (3) includes an upper template (31) and a lower template (33). A molding block (32) is provided between the upper template (31) and the lower template (33). The upper template (31), the molding block (32) and the lower template (33) form a triangular molding cavity for zero R-angle molding.

2. The zero-radius injection mold according to claim 1, characterized in that: The molding block (32) includes a first molding surface (321) for zero R-angle molding and a first inclined surface (322) and a second inclined surface (323) for connection. The first molding surface (321) is provided with a plurality of molding holes (3211) for zero R-angle molding.

3. The zero-radius injection mold according to claim 2, characterized in that: The first forming surface (321) is also provided with a plurality of first connecting grooves (3212) that are connected to the upper template (31); the first inclined surface (322) and the second inclined surface (323) are both provided with a plurality of second connecting grooves (3220) that are connected to the upper template (31).

4. The zero-radius injection mold according to claim 2, characterized in that: The first forming surface (321) is also provided with a first connector (3213) and a second connector (3214) connected to the lower template (33); the first inclined surface (322) and the second inclined surface (323) are both provided with a third connector (3230) connected to the lower template (33).

5. The zero-radius injection mold according to claim 3, characterized in that: The upper template (31) is provided with a second forming surface (311) that abuts against the first forming surface (321), and a third inclined surface (312) and a fourth inclined surface (313) that are respectively connected to the first inclined surface (322) and the second inclined surface (323).

6. The zero-radius injection mold according to claim 5, characterized in that: The second molding surface (311) is provided with a first protrusion (3111) that abuts against the molding hole (3211) and a second protrusion (3112) that connects to the first connecting groove (3212); the third inclined surface (312) and the fourth inclined surface (313) are both provided with a third protrusion (3130) that connects to the second connecting groove (3220).

7. The zero-radius injection mold according to claim 4, characterized in that: The lower template (33) is provided with a third forming surface (331) that abuts against the first forming surface (321), and a fifth inclined surface (332) and a sixth inclined surface (333) that are respectively connected to the first inclined surface (322) and the second inclined surface (323).

8. The zero-radius injection mold according to claim 7, characterized in that: The third forming surface (331) is provided with a fourth protrusion (3311) that abuts against the forming hole (3211); the fifth inclined surface (332) and the sixth inclined surface (333) are both provided with a third connecting groove (3312) that connects to the third connector (3230).

9. The zero-radius injection mold according to claim 8, characterized in that: The lower template (33) is also provided with a fourth connecting groove (3313) connected to the first connecting member (3213) and a fifth connecting groove (3314) connected to the second connecting member (3214).

10. The zero-radius injection mold according to claim 1, characterized in that: The upper molding component (1) is connected to a casting component (2), which penetrates the upper template (31) and is connected to the lower template (33); the lower molding component (6) is connected to a stripping component (4), which penetrates the lower template (33) and abuts against the molding block (32).

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