Injection mold for a camera holder

Abstract

The utility model discloses an injection mold of camera support relates to injection mold technical field, including upper die and lower die, the upper die and lower die mutually butt joint form the mold cavity for the forming product, the upper die is equipped with injection runner, and the injection runner includes the main runner, primary flow channel, two -level flow channel that communicate in proper order, the end of two -level flow channel far away from primary flow channel forms the shunt branch point, and the shunt branch point extends to four tertiary flow channels to all sides and forms, each tertiary flow channel far away from the one end of shunt branch point all is connected with independent four -level flow channel, and the one end of four -level flow channel far away from tertiary flow channel is linked with the mold cavity and communicates, and four tertiary flow channels are with shunt branch point as center and distribute and form two groups radially, and the center axis between two tertiary flow channels of one group forms first center distance, and the center axis between two tertiary flow channels of another group forms second center distance, and first center distance is greater than second center distance, improve the forming quality and production stability.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an injection mold for a camera bracket. Background Technology

[0002] As a key component in security monitoring, smart home, and other equipment, the structural design of camera brackets directly affects the installation stability and angle adjustment accuracy of cameras. Currently, camera brackets are mostly manufactured using injection molding. Because they typically need to meet requirements for support strength and assembly precision, the plastic components often exhibit localized dimensional differences—especially since some camera brackets, to adapt to installation space and load-bearing requirements, adopt an asymmetrical structure with a wider upper section and a relatively narrower lower section, in order to ensure upper installation stability while reducing lower space occupation.

[0003] For injection molding of such asymmetrical structures, traditional mold runner designs often employ symmetrical or equidistant branching runner layouts. However, this design has the following problems: because the upper half of the product is wider and the lower half is narrower, the melt needs to flow to areas of different widths during the filling process. Symmetrical runners can easily lead to insufficient filling in the wide areas or excessive melt in the narrow areas, resulting in localized material shortages, flash, or uneven internal stress in the product. At the same time, a mismatch between the runner branch spacing and the product structure will prolong the difference in melt flow path, leading to inconsistent cooling rates in different areas, which in turn can cause defects such as product warping and out-of-tolerance dimensional accuracy.

[0004] To address the aforementioned issues, a flow channel design for injection molds that can adapt to the asymmetrical structure of camera brackets is needed. By optimizing the distribution spacing of flow channel branches, the melt can be precisely distributed according to the product's top-wide and bottom-narrow structural characteristics, thereby improving the molding quality and production stability of injection molded parts. Utility Model Content

[0005] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0006] An injection mold for a camera bracket includes an upper mold and a lower mold, which are joined together to form a mold cavity for molding a product; The upper mold is provided with injection runners, which include a main runner, a primary runner, and a secondary runner connected in sequence. The end of the secondary runner away from the primary runner forms a branching point, and the branching point extends outward to form four tertiary runners. Each of the three-level flow channels is connected to an independent four-level flow channel at the end furthest from the branch point, and the end of the four-level flow channel furthest from the three-level flow channel is connected to the mold cavity. The four tertiary channels are radially distributed around the branching point and form two groups. In one group, the central axis of the two tertiary channels forms a first center distance, and in the other group, the central axis of the two tertiary channels forms a second center distance. The first center distance is greater than the second center distance.

[0007] As a further embodiment of this utility model: the length of the three-stage flow channel extends along the radial direction, wherein the lengths of the two three-stage flow channels forming the first center distance are greater than the lengths of the two three-stage flow channels forming the second center distance.

[0008] As a further embodiment of this utility model: an arc transition structure is formed at the flow branch point, and the tertiary flow channel and the secondary flow channel are smoothly connected through the arc transition structure.

[0009] As a further embodiment of this utility model: a gate is provided at the connection between the four-stage runner and the mold cavity, and the cross-sectional area of ​​the gate is smaller than the cross-sectional area of ​​the four-stage runner.

[0010] As a further aspect of this utility model: the cross-sectional area of ​​the secondary flow channel is larger than the cross-sectional area of ​​the tertiary flow channel.

[0011] As a further aspect of this utility model: the cross-sectional area of ​​the three-stage flow channel gradually decreases along the direction away from the branch point, and the cross-sectional area of ​​the fourth-stage flow channel is equal to the cross-sectional area of ​​the corresponding third-stage flow channel at the end away from the branch point.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention sets four three-stage runners into two groups with different center distances to adapt to the top-wide and bottom-narrow structure of the camera bracket. Combined with the reasonable setting of runner length and cross-sectional size and the arc transition structure, it can accurately distribute molten plastic to each area of ​​the mold cavity, reduce defects such as uneven filling, material shortage, and flash, while reducing flow resistance, ensuring pressure stability, improving the molding quality and production stability of the camera bracket injection molded parts, and the gate design facilitates the separation of the runner from the product.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the injection runner in the lower mold of this utility model; Figure 3 This is a schematic diagram of the injection molding flow channel in this utility model.

[0016] The reference numerals and names in the figure are as follows: 1. Upper mold; 2. Lower mold; 3. Mold cavity; 4. Main runner; 5. Primary runner; 6. Secondary runner; 7. Branch runner; 8. Tertiary runner; 9. Quaternary runner; 10. First center distance; 11. Second center distance; 12. Arc transition structure; 13. Gate; 14. Injection runner. Detailed Implementation

[0017] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-3 In this embodiment of the invention, the injection mold for a camera bracket has the following specific structure: The injection mold includes an upper mold 1 and a lower mold 2 that cooperate with each other. After the upper mold 1 and the lower mold 2 are connected, a mold cavity 3 is formed for molding the camera bracket product. The shape of the mold cavity 3 is adapted to the camera bracket to be molded, so as to ensure that the plastic part of the camera bracket that meets the design requirements is obtained after injection molding.

[0019] An injection runner 14 is provided on the upper mold 1. This injection runner 14 is used to guide molten plastic material into the mold cavity 3. The injection runner 14 includes a main runner 4, a primary runner 5, a secondary runner 6, a tertiary runner 8, and a quaternary runner 9 connected in sequence, forming a complete material conveying channel. Among them, the main runner 4 serves as the starting part of the injection runner 14 and is used to receive molten plastic injected from the injection molding machine nozzle. The primary runner 5 is connected to the end of the main runner 4 away from the injection molding machine nozzle and guides the molten plastic conveyed by the main runner 4 to the secondary runner 6. A branching point 7 is formed at the end of the secondary runner 6 away from the primary runner 5. The branching point 7 is the connection point between the secondary runner 6 and the tertiary runner 8. Four tertiary runners 8 are formed by extending outward from the branching point 7, so that the molten plastic conveyed by the secondary runner 6 can be distributed to the four tertiary runners 8 through the branching point 7.

[0020] Each tertiary runner 8 is connected to an independent quaternary runner 9 at the end furthest from the branch point 7. The end of the quaternary runner 9 furthest from the tertiary runner 8 is directly connected to the mold cavity 3, thereby introducing the molten plastic transported by the tertiary runner 8 into the mold cavity 3 to complete the filling of the mold cavity 3.

[0021] Four tertiary flow channels 8 are radially distributed around the flow branch point 7, forming two groups. In one group, the central axes of the two tertiary flow channels 8 form a first center-to-center distance 10, while in the other group, the central axes of the two tertiary flow channels 8 form a second center-to-center distance 11, with the first center-to-center distance 10 being greater than the second center-to-center distance 11. This structural design is adapted to the wider upper half and narrower lower half of the camera bracket, resulting in a larger channel spacing in the upper half and a smaller channel spacing in the lower half, thus accommodating the filling requirements of different width sections.

[0022] The length of the three-stage runner 8 extends along the radial direction, wherein the lengths of the two three-stage runners 8 forming the first center-to-center distance 10 are greater than the lengths of the two three-stage runners 8 forming the second center-to-center distance 11. By setting this length, the structural dimensions of different parts of the camera bracket can be further adapted, allowing the molten plastic to be more rationally distributed to different areas of the mold cavity 3.

[0023] An arc transition structure 12 is formed at the flow branch point 7, through which the tertiary flow channel 8 and the secondary flow channel 6 are smoothly connected. This arc transition structure 12 can reduce the flow resistance of molten plastic at the flow branch point 7, prevent molten plastic from stagnating at this part, and ensure the smooth flow of materials.

[0024] A gate 13 is provided at the connection between the four-stage runner 9 and the mold cavity 3. The cross-sectional area of ​​the gate 13 is smaller than that of the four-stage runner 9. As a key part connecting the runner and the mold cavity 3, the smaller cross-sectional area of ​​the gate 13 facilitates the separation of the runner from the product after injection molding, and also helps to control the speed and pressure of molten plastic entering the mold cavity 3.

[0025] The cross-sectional area of ​​the secondary flow channel 6 is larger than that of the tertiary flow channel 8. This flow channel cross-sectional size setting meets the flow requirements of molten plastic during the diversion process, and can ensure that the molten plastic maintains appropriate pressure and flow rate after diversion.

[0026] Furthermore, the cross-sectional area of ​​the third-stage flow channel 8 gradually decreases in the direction away from the branch point 7, and the cross-sectional area of ​​the fourth-stage flow channel 9 is equal to the cross-sectional area of ​​the end of the corresponding third-stage flow channel 8 away from the branch point 7. This structural design allows the molten plastic to maintain a relatively stable pressure during flow, reducing pressure loss, while ensuring a smooth transition between the third-stage flow channel 8 and the fourth-stage flow channel 9, avoiding adverse effects on material flow caused by abrupt changes in cross-section.

[0027] In summary, this utility model, by setting the four three-stage runners 8 into two groups with different center distances, adapts to the structural characteristics of the camera bracket, which is wider at the top and narrower at the bottom. Combined with the reasonable setting of runner length and cross-sectional size and the arc transition structure 12, it can accurately distribute the molten plastic to each area of ​​the mold cavity 3, reduce defects such as uneven filling, material shortage, and flash, while reducing flow resistance, ensuring pressure stability, improving the molding quality and production stability of the camera bracket injection molded parts, and the gate 13 design facilitates the separation of the runner from the product.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. An injection mold for a camera bracket, characterized in that, It includes an upper mold and a lower mold, which are joined together to form a mold cavity for molding products; The upper mold is provided with injection runners, which include a main runner, a primary runner, and a secondary runner connected in sequence. The end of the secondary runner away from the primary runner forms a branching point, and the branching point extends outward to form four tertiary runners. Each of the three-level flow channels is connected to an independent four-level flow channel at the end furthest from the branch point, and the end of the four-level flow channel furthest from the three-level flow channel is connected to the mold cavity. The four tertiary channels are radially distributed around the branching point and form two groups. In one group, the central axis of the two tertiary channels forms a first center distance, and in the other group, the central axis of the two tertiary channels forms a second center distance. The first center distance is greater than the second center distance.

2. The injection mold for a camera bracket according to claim 1, characterized in that, The length of the three-stage flow channels extends along the radial direction, wherein the lengths of the two three-stage flow channels forming the first center distance are greater than the lengths of the two three-stage flow channels forming the second center distance.

3. The injection mold for a camera bracket according to claim 1, characterized in that, A circular arc transition structure is formed at the flow branch point, and the tertiary flow channel and the secondary flow channel are smoothly connected through the circular arc transition structure.

4. The injection mold for a camera bracket according to claim 1, characterized in that, A gate is provided at the connection between the four-stage runner and the mold cavity, and the cross-sectional area of ​​the gate is smaller than the cross-sectional area of ​​the four-stage runner.

5. The injection mold for a camera bracket according to any one of claims 1-4, characterized in that, The cross-sectional area of ​​the secondary flow channel is larger than that of the tertiary flow channel.

6. The injection mold for a camera bracket according to claim 1, characterized in that, The cross-sectional area of ​​the third-stage flow channel gradually decreases in the direction away from the branch point, and the cross-sectional area of ​​the fourth-stage flow channel is equal to the cross-sectional area of ​​the corresponding third-stage flow channel at the end away from the branch point.

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