Mold with hot runner

Abstract

The utility model discloses a mold with a hot runner, which belongs to the technical field of molds and comprises a base table, an upper mold table, a forming cavity, an injection flow guide port, a hot runner system and a lower mold table matched with the upper mold table. The upper die table is fixedly mounted on the base table; an injection flow guide opening is formed in the bottom center of the upper mold table; a forming cavity is formed in the top of the upper mold table, and an injection molding runner is arranged in the upper mold table; a hot runner system is mounted at the bottom of the upper mold table; a central forming groove for forming is formed in the forming cavity; the hot runner system comprises an electric appliance connecting box, a frame structure, an air cylinder and a needle valve type hot nozzle; the electric appliance connecting box is fixedly installed on the side edge of the upper die table, the frame structure is fixedly installed at the bottom of the upper die table, and the needle valve type hot nozzles are evenly arranged in the upper die table at equal intervals. The needle valve type hot nozzle is aligned with the central forming groove; air cylinders are evenly and fixedly installed at the bottom of the upper die table at equal intervals. In this way, sun lines are prevented from appearing at the position in contact with the needle valve type hot nozzle.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, specifically to molds with hot runners. Background Technology

[0002] A hot runner mold is a type of mold that incorporates a hot runner system within an injection mold. This system keeps the molten plastic in a fully molten state during injection into the cavity, allowing for better flow of the molten plastic within the cavity when molding precision parts, thus improving molding quality.

[0003] For example, Chinese patent CN219466866U discloses a hot runner mold assembly. The mold is equipped with a heating pipe and a hot nozzle. The injection liquid is injected into the cavity through the hot nozzle, and the heating pipe heats the hot nozzle, thereby keeping the injection liquid in the hot nozzle flowing. Furthermore, the hot nozzle is equipped with an elastic component to prevent glue leakage between the frame box and the hot nozzle.

[0004] However, when the mold is cooled inside the cavity, the temperature of the part that contacts the hot nozzle is different from that of the rest of the part, which can easily cause sunburst patterns to appear on the molded part and affect the quality of the molded part.

[0005] Based on this, the present invention designs a mold with a hot runner to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a mold with a hot runner.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A mold with a hot runner system includes a base, an upper mold base, a hot runner system, and a lower mold base that works in conjunction with the upper mold base.

[0009] The upper mold platform is fixedly installed on the base platform; an injection guide port is provided at the bottom center of the upper mold platform; a molding cavity is provided at the top of the upper mold platform, and an injection flow channel is provided inside the upper mold platform; a hot runner system is installed at the bottom of the upper mold platform; and a central molding groove for molding is provided inside the molding cavity.

[0010] The hot runner system includes an electrical connector box, a frame structure, a cylinder, a needle valve type hot nozzle, and a heating tube for heating the needle valve type hot nozzle; the heating tube is fixedly installed inside the upper mold platform; the electrical connector box is fixedly installed on the side of the upper mold platform, the frame structure is fixedly installed on the bottom of the upper mold platform, and the needle valve type hot nozzles are evenly spaced inside the upper mold platform; the needle valve type hot nozzles are aligned with the central forming groove; and cylinders for driving the needle valve type hot nozzles are evenly fixedly installed at equal intervals on the bottom of the upper mold platform.

[0011] Furthermore, the molding cavity structure is symmetrical, with the central molding groove located in the middle of the molding cavity.

[0012] Furthermore, the needle valve type hot nozzle is provided in multiple ways, and the multiple needle valve type hot nozzles are evenly distributed at equal intervals.

[0013] Furthermore, the end of the needle valve hot nozzle is shaped to match the corresponding central forming groove.

[0014] Furthermore, guide columns are fixedly installed in a rectangular array on the upper side of the upper mold platform.

[0015] Furthermore, a cooling pipe is provided on the outer side of the end of the needle valve type hot nozzle.

[0016] Furthermore, the frame structure includes a fixing frame and a frame box, with the fixing frame fixedly installed on the bottom of the upper mold table and the frame box fixedly installed on the fixing frame.

[0017] Furthermore, the frame box is configured in a U-shape, with the cylinder located in the middle of the frame box.

[0018] Compared with the prior art, the advantages of this utility model are as follows: A relatively sealed molding cavity is formed by the cooperation of the upper mold platen and the upper mold platen itself; the injection molten plastic for the molding die is injected into the injection channel within the upper mold platen through the injection guide port. After being diverted by the channel within the upper mold platen, the injection molten plastic flows into the needle valve hot nozzle. The injection molten plastic is continuously heated and flows into the molding cavity through the needle valve hot nozzle. When the injection molten plastic in the molding cavity is sufficient, the needle valve hot nozzle is sealed by a cylinder; this ensures that the injection molten plastic is fully molten and flows into the molding cavity during this process; the injection molten plastic cools and solidifies within the molding cavity, and then the molded part is removed from the molding cavity; the positioning of the central molding groove and the needle valve hot nozzle minimizes sunburst patterns caused by temperature inconsistencies between the contact area with the needle valve hot nozzle and other parts; thus effectively improving the quality of the molded part. Attached Figure Description

[0019] 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.

[0020] Figure 1 This is a right view of the mold with a hot runner according to this utility model;

[0021] Figure 2 This utility model relates to a three-dimensional mold with a hot runner. Figure 1 ;

[0022] Figure 3 This utility model relates to a three-dimensional mold with a hot runner. Figure 2 ;

[0023] Figure 4 This utility model relates to a three-dimensional mold with a hot runner. Figure 3 .

[0024] The labels in the diagram represent:

[0025] 1. Base; 2. Upper mold platform; 21. Guide pillar; 3. Molding cavity; 31. Central molding groove; 4. Injection runner; 5. Hot runner system; 51. Electrical connection box; 52. Frame structure; 521. Fixing bracket; 522. Frame box; 53. Cylinder; 54. Needle valve hot nozzle. Detailed Implementation

[0026] 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, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0027] The terms "left," "right," "front," "back," "up," and "down" used in the following description refer to the orientation from the perspective of the front view.

[0028] Example 1: In some embodiments, please refer to the accompanying drawings. Figures 1-3 A mold with a hot runner includes a base 1, an upper mold base 2, a hot runner system 5, and a lower mold base that works in conjunction with the upper mold base 2.

[0029] The upper mold platform 2 is fixedly installed on the base platform 1; an injection guide port 4 is provided at the bottom center of the upper mold platform 2; a molding cavity 3 is provided at the top of the upper mold platform 2; an injection flow channel is provided inside the upper mold platform 2; a hot runner system 5 is installed at the bottom of the upper mold platform 2; a central molding groove 31 for molding is provided inside the molding cavity 3.

[0030] The hot runner system 5 includes an electrical connector box 51, a frame structure 52, a cylinder 53, a needle valve type hot nozzle 54, and a heating tube for heating the needle valve type hot nozzle 54; the heating tube is fixedly installed inside the upper mold platform 2; the electrical connector box 51 is fixedly installed on the side of the upper mold platform 2, the frame structure 52 is fixedly installed on the bottom of the upper mold platform 2, and the needle valve type hot nozzles 54 are evenly spaced inside the upper mold platform 2; the needle valve type hot nozzles 54 are aligned with the central forming groove 31; the cylinders 53 for driving the needle valve type hot nozzles 54 are evenly fixedly installed at equal intervals on the bottom of the upper mold platform 2.

[0031] In this embodiment, when the mold with hot runner is working normally, the upper mold platen and the upper mold platen 2 cooperate to form a relatively sealed molding cavity 3. The injection liquid for molding is injected into the injection runner in the upper mold platen 2 through the injection guide port 4. After being diverted by the runner in the upper mold platen 2, the injection liquid flows into the needle valve hot nozzle 54. The injection liquid is continuously heated and flows into the molding cavity 3 through the needle valve hot nozzle 54. When the injection liquid in the molding cavity 3 is sufficient, the needle valve hot nozzle 54 is closed by the cylinder 53. This allows the injection liquid to flow into the molding cavity 3 in a fully molten state during the process. The injection liquid cools and solidifies in the molding cavity 3, and then the molded part is taken out of the molding cavity 3. The positioning of the central molding groove 31 and the needle valve hot nozzle 54 minimizes the sunburst pattern caused by the temperature difference between the contact point with the needle valve hot nozzle 54 and the rest of the part, thereby effectively improving the quality of the molded part.

[0032] Example 2: In some embodiments, such as Figures 1-4 As shown, in a preferred embodiment of the present invention, the molding cavity 3 has a symmetrical structure, and the central molding groove 31 is located in the middle of the molding cavity 3;

[0033] Multiple needle valve type hot nozzles 54 are provided, and the multiple needle valve type hot nozzles 54 are evenly distributed at equal intervals.

[0034] The end of the needle valve type hot nozzle 54 has the same shape as the corresponding central forming groove 31;

[0035] Guide columns 21 are fixedly installed in a rectangular array on the upper side of the upper mold table 2;

[0036] A cooling pipe is provided on the outer side of the end of the needle valve type hot nozzle 54;

[0037] The frame structure 52 includes a fixing frame 521 and a frame box 522. The fixing frame 521 is fixedly installed on the bottom of the upper mold table 2, and the frame box 522 is fixedly installed on the fixing frame 521.

[0038] The frame box 522 is configured in a U-shape, and the cylinder 53 is located in the middle of the frame box 522.

[0039] In this embodiment, when the molding cavity 3, injection guide port 4, and hot runner system 5 are working normally, the upper mold platen and upper mold platen 2 cooperate to form a relatively sealed molding cavity 3. The injection fluid for the molding die is injected into the injection runner in the upper mold platen 2 through the injection guide port 4. After being diverted by the runner, the injection fluid flows into the needle valve type hot nozzle 54. The injection fluid is continuously heated and flows into the molding cavity 3 through the needle valve type hot nozzle 54. When the injection fluid in the molding cavity 3 is sufficient, the needle valve type hot nozzle 54 is closed by the cylinder 53. Hot nozzle 54; during this process, the injection molding liquid is fully molten and flows into the molding cavity 3; the injection molding liquid cools and solidifies in the molding cavity 3, and then the molded part is taken out from the molding cavity 3; through the setting of the position and shape of the central molding groove 31 and the needle valve hot nozzle 54, the shape of the needle valve hot nozzle 54 and the central molding groove 31 are consistent; it can effectively cover the sun pattern; thereby effectively improving the appearance and texture of the molded part; through the setting of the fixing bracket 521 and the frame box 522, the overall structure is compact and neat.

[0040] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A mold with a hot runner system, comprising a base (1), an upper mold platform (2), a hot runner system (5), and an upper mold platform used in conjunction with a lower mold platform, characterized in that: The upper mold platform (2) is fixedly installed on the base platform (1); an injection guide port (4) is provided at the bottom center of the upper mold platform (2); a molding cavity (3) is provided at the top of the upper mold platform (2); an injection flow channel is provided inside the upper mold platform (2); a hot runner system (5) is installed at the bottom of the upper mold platform (2); a central molding groove (31) for molding is provided inside the molding cavity (3); The hot runner system (5) includes an electrical connector box (51), a frame structure (52), a cylinder (53), a needle valve type hot nozzle (54), and a heating tube for heating the needle valve type hot nozzle (54); the heating tube is fixedly installed inside the upper mold platform (2); the electrical connector box (51) is fixedly installed on the side of the upper mold platform (2), the frame structure (52) is fixedly installed at the bottom of the upper mold platform (2), and the needle valve type hot nozzles (54) are evenly arranged at equal intervals inside the upper mold platform (2); the needle valve type hot nozzles (54) are aligned with the central forming groove (31); the cylinders (53) for driving the needle valve type hot nozzles (54) are evenly fixedly installed at equal intervals at the bottom of the upper mold platform (2).

2. The mold with hot runner according to claim 1, characterized in that, The molding cavity (3) has a symmetrical structure, and the central molding groove (31) is located in the middle of the molding cavity (3).

3. The mold with a hot runner according to claim 1, characterized in that, The needle valve type hot nozzle (54) is provided in multiple ways, and the multiple needle valve type hot nozzles (54) are evenly distributed at equal intervals.

4. The mold with a hot runner according to claim 2, characterized in that, The end of the needle valve type hot nozzle (54) is shaped to match the corresponding central forming groove (31).

5. The mold with a hot runner according to claim 1, characterized in that, The upper side of the upper mold table (2) is fixedly equipped with guide columns (21) in a rectangular array.

6. The mold with a hot runner according to claim 3, characterized in that, A cooling pipe is provided on the outer side of the end of the needle valve type hot nozzle (54).

7. The mold with a hot runner according to claim 1, characterized in that, The frame structure (52) includes a fixing frame (521) and a frame box (522). The fixing frame (521) is fixedly installed on the bottom of the upper mold platform (2), and the frame box (522) is fixedly installed on the fixing frame (521).

8. The mold with a hot runner according to claim 7, characterized in that, The frame box (522) is configured in a U-shape, and the cylinder (53) is located in the middle of the frame box (522).

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