High-yield mobile phone shell precision injection mold

Abstract

This invention provides a high-yield precision injection mold for mobile phone cases, comprising an upper mold base, a lower mold base, an upper mold core, a lower mold core, a gating assembly, and a guide plate. The upper mold core is located at the bottom of the guide plate, forming an injection cavity between the lower and upper mold cores. One side of the guide plate has a guide groove and a gating channel, with multiple gating channels connecting the guide groove and different positions within the injection cavity. The guide groove is connected to the gating assembly. One side of the lower mold core has a core block, with a venting gap between the core block and the upper mold core. One side of the upper mold core has a venting groove, connecting the injection cavity and the venting groove. This invention injects molten material into different positions within the injection cavity through multiple gating channels, allowing the molten material to quickly and evenly fill all corners. Simultaneously, the venting gap and venting groove between the core block and the upper mold core improve the flow efficiency of the molten material, ensuring uniform and continuous filling of the entire injection cavity, resulting in high-quality, high-yield products.

Description

Technical Field

[0001] This utility model relates to the field of injection molds, and in particular to a high-yield precision injection mold for mobile phone cases. Background Technology

[0002] Many consumers use phone cases to protect their phones. Most phone cases on the market are made using injection molding. To meet diverse functional needs, current phone cases feature increasingly complex structures, often requiring multiple through-holes with different functions, such as through-holes for cameras, mounting holes for various stands, and so on.

[0003] These through-holes result in significant hollowing out of the product's structure. When injection molding such large-scale hollowed-out phone cases, the structure at these hollow areas can easily affect the flow and temperature fields of the molten material within the mold cavity, leading to uneven plastic flow and cooling shrinkage. This can cause structural inconsistencies and extremely uneven distribution of residual stress within the product. This unbalanced internal stress gradually releases during storage or use after demolding, ultimately causing overall or partial warping and deformation of the product, resulting in quality defects such as poor flatness and misalignment of hole dimensions.

[0004] Therefore, it is necessary to provide a high-yield precision injection mold for mobile phone cases to solve the above-mentioned technical problems. Utility Model Content

[0005] This invention provides a high-yield precision injection mold for mobile phone cases, which solves the problems of poor quality caused by large-scale hollow products manufactured by existing injection molds, such as overall or partial warping and deformation, poor flatness, and misalignment of hole dimensions.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is: a high-yield precision injection mold for mobile phone cases, wherein the mobile phone case is provided with functional through holes, and the high-yield precision injection mold for mobile phone cases includes: an upper mold base, a lower mold base, an upper mold core, a lower mold core, a gating component, and a guide plate; The guide plate is disposed at the bottom of the upper mold base, the upper mold core is disposed at the bottom of the guide plate, and the lower mold core is disposed at the top of the lower mold base. An injection cavity is formed between the lower mold core and the upper mold core. The side of the guide plate opposite to the upper mold core is provided with a guide groove and multiple gating channels connecting the guide groove and the injection cavity. The multiple gating channels are connected to different positions in the injection cavity. The gating assembly is disposed in the upper mold base, and the guide groove is connected to the output end of the gating assembly. The lower mold core has a core block for forming the functional through hole on the side near the injection cavity. There is a venting gap between the core block and the upper mold core. The upper mold core has a venting groove on the side near the injection cavity. The venting gap connects the injection cavity and the venting groove. The venting groove is connected to the external space.

[0007] In this utility model, the functional through hole is a circular through hole, and the exhaust groove includes an annular groove and a straight groove. The straight groove is located inside the annular groove, and both ends of the straight groove are connected to the annular groove.

[0008] The upper mold core is provided with a first vent hole, which connects the middle part of the straight groove and the outer space.

[0009] Furthermore, the exhaust gap is an annular structure, and the exhaust gap is concentrically arranged with the annular groove, the exhaust gap surrounding and communicating with the outside of the annular groove.

[0010] Furthermore, the straight groove passes through the center of the annular groove.

[0011] In this invention, the depth of the exhaust gap is 0.01-0.03 mm.

[0012] In this utility model, the phone case is provided with two functional through holes, and a wide area and a narrow area are respectively provided on the side of the two functional through holes that are far apart from each other. The area of ​​the wide area is larger than the area of ​​the narrow area. The guide groove is connected to two casting channels. The position of one casting channel is opposite to the wide area, and the position of the other casting channel is opposite to the side between the two functional through holes.

[0013] The upper mold core is provided with two second vent holes that connect the injection cavity and the external space. One of the second vent holes is located opposite the wide area, and the other is located opposite the narrow area.

[0014] In this invention, the side of the guide plate facing away from the upper mold core is also provided with an overflow groove, and the overflow groove is connected to the guide groove.

[0015] In this invention, the outer periphery of the functional through hole is provided with an annular protrusion, and the upper mold core is provided with an annular groove for forming the annular protrusion.

[0016] Compared with the prior art, the advantages of this utility model are as follows: The high-yield precision injection mold for mobile phone cases of this utility model injects molten material into multiple different positions in the injection cavity, so that the molten material can quickly and evenly fill all corners. At the same time, by setting venting gaps and venting grooves between the core block and the upper mold core, the flow efficiency of the molten material can be improved, so that the molten material fills the entire injection cavity evenly and continuously, resulting in high-quality and high-yield products. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments are briefly introduced below. The drawings described below are only the corresponding drawings of some embodiments of this utility model.

[0018] Figure 1 This is an exploded structural diagram of the high-yield precision injection mold for mobile phone cases according to this utility model.

[0019] Figure 2 This is a schematic diagram of the upper mold core in this utility model.

[0020] Figure 3 This is a partial structural cross-sectional view of the high-yield precision injection mold for mobile phone cases according to this utility model. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] The directional terms mentioned in this utility model, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom", are only for reference to the orientation of the accompanying drawings. The directional terms used are for the purpose of explaining and understanding this utility model, and are not intended to limit this utility model.

[0023] The terms "first" and "second" in this utility model are used for descriptive purposes only and should not be construed as indicating or implying relative importance, nor as a restriction on the order of events.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, a connection can be a detachable connection or a connection of an integral structure; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components or an interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] In existing injection molding techniques, when injection molding large-scale perforated mobile phone cases, the structure of the perforations can easily affect the flow and temperature fields of the molten material within the mold cavity. This leads to uneven plastic flow and uneven cooling and shrinkage, resulting in structural inconsistencies and extremely uneven distribution of residual stress within the product. This unbalanced internal stress gradually releases during storage or use after demolding, ultimately causing overall or partial warping and deformation of the product, resulting in quality defects such as poor flatness and misalignment of hole dimensions.

[0026] The following is a preferred embodiment of a high-yield precision injection mold for mobile phone cases provided by this utility model, which can solve the above-mentioned technical problems.

[0027] Please refer to Figure 1 , Figure 2 and Figure 3 In the diagram, units with similar structures are represented by the same labels.

[0028] This embodiment provides a high-yield precision injection mold for mobile phone cases. The mobile phone case 21 is provided with a functional through hole 211. The high-yield precision injection mold for mobile phone cases includes: an upper mold base 11, a lower mold base 12, an upper mold core 13, a lower mold core 14, a gating assembly 15, and a guide plate 16.

[0029] A guide plate 16 is disposed at the bottom of the upper mold base 11, an upper mold core 13 is disposed at the bottom of the guide plate 16, and a lower mold core 14 is disposed at the top of the lower mold base 12. An injection cavity is formed between the lower mold core 14 and the upper mold core 13. A guide groove 161 and multiple gating channels 1611 connecting the guide groove 161 and the injection cavity are provided on the side of the guide plate 16 facing away from the upper mold core 13. These multiple gating channels 1611 are connected to different positions within the injection cavity, injecting molten material into multiple different positions within the injection cavity. This allows the molten material to quickly and evenly fill all corners, thereby improving the quality of the injection molded product. A gating assembly 15 is disposed within the upper mold base 11, and the guide groove 161 is connected to the output end of the gating assembly 15.

[0030] The lower mold core 14 has a core block 141 for forming a functional through hole 211 on the side near the injection cavity. A venting gap 135 exists between the core block 141 and the upper mold core 13. A venting groove 131 is provided on the side of the upper mold core 13 near the injection cavity. The venting gap 135 connects the injection cavity and the venting groove 131, which in turn connects to the external space. By providing the venting gap 135 and the venting groove 131 between the core block 141 and the upper mold core 13, the injection resistance in the surrounding area of ​​the core block 141 is reduced, resulting in good venting performance. This improves the flow efficiency of the molten material, allowing it to fill the entire injection cavity uniformly and continuously, leading to high-quality and high-yield molded products.

[0031] Please refer to Figure 2 In this embodiment, the functional through hole 211 is a circular through hole, and the exhaust groove 131 includes an annular groove 1311 and a straight groove 1312. The straight groove 1312 is located inside the annular groove 1311, and both ends of the straight groove 1312 are connected to the annular groove 1311. In this way, airflow can be allowed to flow in and out 360° around the outer periphery of the exhaust groove 131, resulting in good exhaust effect. Furthermore, the core block 141 can form a stable surface contact with the side where the exhaust groove 131 is located.

[0032] The upper mold core 13 has a first vent hole 132 that is provided through it, and the first vent hole 132 connects the middle part of the straight groove 1312 and the outer space.

[0033] Furthermore, the straight groove 1312 passes through the center of the annular groove 1311, so that exhaust can be effectively discharged through the first exhaust hole 132 at any position on the outer periphery of the exhaust groove 131.

[0034] Please refer to Figure 2 and Figure 3 In this embodiment, the exhaust gap 135 is an annular structure. The exhaust gap 135 and the annular groove 1311 are concentrically arranged, and the exhaust gap 135 surrounds and connects to the outside of the annular groove 1311.

[0035] In this embodiment, the depth of the venting gap 135 is 0.01-0.03 mm. The venting gap 135 can vent well, but the molten material does not easily pass through the venting gap 135.

[0036] Please refer to Figure 1 and Figure 2 In this embodiment, the phone case 21 has two functional through holes 211, and the two functional through holes 211 are respectively provided with a wide area and a narrow area on the side that is far apart from each other, such as Figure 1The left end of the middle phone casing 21 is a wide area, and the right end is a narrow area, with the area of ​​the wide area being larger than that of the narrow area. The guide groove 161 is connected to two casting channels 1611. One casting channel 1611 is positioned opposite the wide area, and the other casting channel 1611 is positioned opposite one side between the two functional through holes 211.

[0037] It should also be noted that the upper mold core 13 is provided with a connecting channel 133 corresponding to the gating channel 1611, and the gating channel 1611 is connected to the injection cavity through the connecting channel 133. Therefore, the positions of the two gating channels 1611 can be referenced. Figure 2 The location of the central docking channel 133.

[0038] Please refer to Figure 2 The upper mold core 13 has two through-holes 134 that connect the injection cavity and the external space. One of the second vent holes 134 is positioned opposite the wide area, and the other is positioned opposite the narrow area. This further improves the venting effect and increases the flow efficiency of the molten material.

[0039] In this embodiment, the side of the guide plate 16 facing away from the upper mold core 13 is also provided with an overflow groove 162. The overflow groove 162 is connected to the guide groove 161. In this way, after the injection cavity is filled, the molten material overflows into the overflow groove 162, which can ensure the full filling of the injection cavity.

[0040] In this embodiment, an annular protrusion 212 is provided on the outer periphery of the functional through hole 211, and an annular groove for forming the annular protrusion 212 is provided on the upper mold core 13. The annular protrusion 212 can improve the structural strength of the phone case 21, making the phone case 21 less prone to deformation.

[0041] The working principle of this utility model is as follows: Molten material is injected into the injection cavity through the casting component 15, the guide groove 161 and multiple casting channels 1611. The venting gap 135 and the venting groove 131 can vent through the first venting hole 132. At the same time, the injection cavity can also vent through the second venting hole 134, thereby improving the flow efficiency of the molten material, so that the molten material fills the entire injection cavity evenly and continuously. The molded product has a balanced stress distribution, uniform shrinkage, good product quality and high yield.

[0042] This preferred embodiment of a high-yield precision injection mold for mobile phone cases injects molten material into multiple different locations within the injection cavity, enabling the molten material to quickly and evenly fill all corners. Simultaneously, by setting venting gaps and venting grooves between the core block and the upper mold core, the flow efficiency of the molten material is improved, allowing the molten material to fill the entire injection cavity uniformly and continuously, resulting in high-quality and high-yield molded products.

[0043] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A high-yield precision injection mold for a mobile phone case, characterized by, The phone case has functional through holes, including: upper mold base, lower mold base, upper mold core, lower mold core, gating component, and guide plate; The guide plate is disposed at the bottom of the upper mold base, the upper mold core is disposed at the bottom of the guide plate, and the lower mold core is disposed at the top of the lower mold base. An injection cavity is formed between the lower mold core and the upper mold core. The side of the guide plate opposite to the upper mold core is provided with a guide groove and multiple gating channels connecting the guide groove and the injection cavity. The multiple gating channels are connected to different positions in the injection cavity. The gating assembly is disposed in the upper mold base, and the guide groove is connected to the output end of the gating assembly. The lower mold core has a core block for forming the functional through hole on the side near the injection cavity. There is a venting gap between the core block and the upper mold core. The upper mold core has a venting groove on the side near the injection cavity. The venting gap connects the injection cavity and the venting groove. The venting groove is connected to the external space.

2. The high yield precision injection mold for a mobile phone case according to claim 1, wherein, The functional through hole is a circular through hole, and the exhaust groove includes an annular groove and a straight groove. The straight groove is located inside the annular groove, and both ends of the straight groove are connected to the annular groove.

3. The high-yield mobile phone case precision injection mold of claim 2, wherein, The upper mold core is provided with a first vent hole, which connects the middle part of the straight groove and the outer space.

4. The high yield precision injection mold for a cell phone case of claim 2, wherein, The exhaust gap is an annular structure, and the exhaust gap is concentrically arranged with the annular groove. The exhaust gap surrounds and connects to the outside of the annular groove.

5. The high yield precision injection mold for a cell phone case of claim 2, wherein, The straight groove passes through the center of the annular groove.

6. The high yield precision injection mold for a cell phone case of claim 1, wherein, The depth of the exhaust vent is 0.01-0.03 mm.

7. The high yield precision injection mold for a cell phone case of claim 1, wherein, The phone case has two functional through holes. A wide area and a narrow area are respectively provided on the side of the two functional through holes that are far apart from each other. The area of ​​the wide area is larger than the area of ​​the narrow area. The guide groove is connected to two casting channels. The position of one casting channel is opposite to the wide area, and the position of the other casting channel is opposite to the side between the two functional through holes.

8. The high-yield mobile phone case precision injection mold of claim 7, wherein, The upper mold core is provided with two second vent holes that connect the injection cavity and the external space. One of the second vent holes is located opposite the wide area, and the other is located opposite the narrow area.

9. The high yield precision injection mold for a cell phone case of claim 1, wherein, The side of the guide plate opposite to the upper mold core is also provided with an overflow groove, and the overflow groove is connected to the guide groove.

10. The high yield precision injection mold for a cell phone case of claim 1, wherein, The outer periphery of the functional through hole is provided with an annular protrusion, and the upper mold core is provided with an annular groove for forming the annular protrusion.

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