An equalized feed injection mold runner structure

Abstract

The utility model discloses a kind of balanced feed injection mould runner structure, including runner structure;The runner structure is composed of runner and casting core, the runner inside upper end is equipped with conical hopper, the runner outside upper end is equipped with heating mechanism, the runner inside is equipped with flow guide cylinder, the flow guide cylinder outside is equipped with spring, the baffle is installed in the runner inside bottom end, the flow guide cylinder bottom end is equipped with flow guide needle, the flow guide needle sliding installation is in the casting core inside.The utility model when melt pressure increases, flow guide cylinder will compress spring and move downwards, drive the flow guide needle of bottom end and slide downwards in casting core inside, increase the cross-sectional area of feed passage in casting core;When melt pressure reduces, spring resets and promotes flow guide cylinder and moves upwards, flow guide needle moves upwards along with it, reduce the cross-sectional area of feed passage, realize the balance of melt feed pressure by this kind of dynamic adjustment, guarantee mould each type cavity feed uniform.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically a balanced feeding injection mold flow channel structure. Background Technology

[0002] The runner system of an injection mold is a key channel connecting the injection machine nozzle and the mold cavity. Its core function is to smoothly and evenly deliver molten plastic (molten adhesive) to each cavity and maintain appropriate pressure, temperature and fluidity during the filling process.

[0003] Chinese Patent No. 202222474968.0 discloses a flow channel structure for injection molds, including a first body and a second body. Mounting seats are fixedly installed on both sides of the first body, and connecting blocks that engage with the mounting seats are fixedly installed on both sides of the second body. A return spring is fixedly installed on the upper surface of the mounting seat, and a plug that penetrates the mounting seat is fixedly connected to the upper end of the return spring. The plug is inserted into the connecting block.

[0004] When using this invention, the material cannot be fed evenly, which can easily lead to uneven feeding speed and affect the injection molding effect. Utility Model Content

[0005] The purpose of this invention is to provide a balanced feed injection mold flow channel structure to solve the problems raised in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a balanced feeding injection mold runner structure, comprising a runner structure; the runner structure consists of a runner and a casting core, the upper end of the casting core is welded to the bottom end of the runner, a mounting base is installed at the upper end of the runner, a conical funnel is installed at the upper end inside the runner, a heating mechanism is installed at the upper end outside the runner, a guide cylinder is installed inside the runner, a spring is installed on the outer side of the guide cylinder, the upper end of the spring is installed on the outer side of the upper end of the guide cylinder, the lower end of the spring is installed on the upper end of a baffle, the baffle is installed at the bottom end inside the runner, and a guide pin is installed at the bottom end of the guide cylinder, the guide pin being slidably installed inside the casting core.

[0007] Preferably, an upper limiting plate is installed at the upper end of the guide tube, and the upper limiting plate is slidably installed inside the flow channel.

[0008] Preferably, the upper limiting plate is provided with a dynamic sealing ring, which is welded to the outside of the upper limiting plate.

[0009] Preferably, the bottom end of the guide needle is provided with a bottom limiting plate, which is welded to the bottom end of the guide needle and is slidably installed inside the casting core.

[0010] Preferably, the heating mechanism consists of a heating ring and a housing, the housing being installed on the outer side of the upper end of the flow channel, and the heating ring being installed inside the housing on the outer side of the flow channel.

[0011] Preferably, a heat insulation plate is provided between the heating ring and the outer shell, and the heat insulation plate is installed inside the outer shell.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. When the melt pressure increases, the guide cylinder compresses the spring and moves downward, causing the guide needle at the bottom to slide downward inside the casting core, increasing the cross-sectional area of ​​the feeding channel inside the casting core; when the melt pressure decreases, the spring returns to its original position and pushes the guide cylinder upward, and the guide needle moves upward accordingly, reducing the cross-sectional area of ​​the feeding channel. This dynamic adjustment achieves the balance of melt feeding pressure, ensuring uniform feeding of each cavity of the mold.

[0014] 2. The dynamic sealing ring welded to the outside of the upper limiting plate can closely fit the inner wall of the flow channel during the sliding of the limiting plate with the guide tube, forming a dynamic sealing structure. This design can effectively prevent the high-temperature melt in the flow channel from leaking from the gap between the upper limiting plate and the inner wall of the flow channel, which not only avoids melt waste and mold contamination, but also ensures the pressure stability inside the flow channel, providing a sealing guarantee for balanced feeding. At the same time, the material properties of the dynamic sealing ring can also reduce the frictional resistance when the limiting plate slides, ensuring a smooth adjustment process.

[0015] 3. In the heating mechanism, the outer shell is installed on the upper outer side of the flow channel to provide protection, avoid interference from the external environment to the heating components, and protect the operator from high temperature burns. The heating ring inside the outer shell acts directly on the outer side of the flow channel, and provides continuous heat to the melt in the flow channel by heating through electricity, maintaining the melt at a suitable flow temperature.

[0016] 4. The heat insulation plate between the heating ring and the outer shell can effectively block heat transfer to the outer shell, reduce heat loss, improve heating efficiency, ensure uniform and stable melt temperature in the flow channel, avoid melt flow differences caused by local cooling, and provide temperature protection for balanced feeding. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the guide tube of this utility model;

[0021] Figure 4 This is a schematic diagram of the heating mechanism of this utility model.

[0022] In the diagram: 1. Flow channel structure; 2. Flow channel; 3. Cast core; 4. Heating mechanism; 5. Mounting base; 6. Heating ring; 7. Heat insulation plate; 8. Outer shell; 9. Conical funnel; 10. Upper limiting plate; 11. Spring; 12. Guide needle; 13. Baffle; 14. Bottom limiting plate; 15. Guide tube; 16. Dynamic sealing ring. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 In this embodiment of the present invention, a balanced feeding injection mold flow channel structure includes a flow channel structure 1; the flow channel structure 1 consists of a flow channel 2 and a casting core 3, the upper end of the casting core 3 is welded to the bottom end of the flow channel 2, a mounting base 5 is installed on the upper end of the flow channel 2, a conical funnel 9 is installed on the upper end inside the flow channel 2, a heating mechanism 4 is installed on the upper end outside the flow channel 2, a guide cylinder 15 is installed inside the flow channel 2, a spring 11 is installed on the outer side of the guide cylinder 15, the upper end of the spring 11 is installed on the outer side of the upper end of the guide cylinder 15, the lower end of the spring 11 is installed on the upper end of the baffle 13, the baffle 13 is installed on the bottom end inside the flow channel 2, and a guide needle 12 is installed on the bottom end of the guide cylinder 15, the guide needle 12 is slidably installed inside the casting core 3.

[0025] An upper limiting plate 10 is installed on the upper end of the guide tube 15. The upper limiting plate 10 is slidably installed inside the flow channel 2. Its main function is to limit the vertical sliding range of the guide tube 15. When the guide tube 15 moves under the melt pressure and the force of the spring 11, the upper limiting plate 10 will contact the corresponding limiting structure inside the flow channel 2 to avoid structural damage caused by excessive upward or downward movement of the guide tube 15. At the same time, it ensures that the guide tube 15 always moves within the effective working range, ensures the adjustment accuracy of the guide needle 12 to the feed channel, and maintains a balanced feeding effect.

[0026] The upper limiting plate 10 is equipped with a dynamic sealing ring 16, which is welded to the outside of the upper limiting plate 10. During the sliding process of the limiting plate with the guide tube 15, the dynamic sealing ring 16 welded to the outside of the upper limiting plate 10 can tightly fit against the inner wall of the flow channel 2, forming a dynamic sealing structure. This design effectively prevents the high-temperature melt in the flow channel 2 from leaking through the gap between the upper limiting plate 10 and the inner wall of the flow channel 2, avoiding melt waste and mold contamination, while ensuring the pressure stability inside the flow channel 2 and providing a sealing guarantee for balanced feeding. At the same time, the material properties of the dynamic sealing ring 16 can also reduce the frictional resistance when the limiting plate slides, ensuring a smooth adjustment process.

[0027] A bottom limiting plate 14 is provided at the bottom end of the guide pin 12. The bottom limiting plate 14 is welded to the bottom end of the guide pin 12 and is slidably installed inside the casting core 3. The function of the bottom limiting plate 14 welded to the bottom end of the guide pin 12 is to limit the downward stroke of the guide pin 12. When the guide pin 12 moves downward with the guide cylinder 15, the bottom limiting plate 14 will abut against the limiting structure inside the casting core 3 to prevent the guide pin 12 from extending too far out of the casting core 3 and affecting the gate structure or causing the feed channel to open too much, thus ensuring the controllability of the feed amount. When the guide pin 12 moves upward and resets, the bottom limiting plate 14 can also help it maintain a stable position, ensuring the consistency of the feed channel size after each adjustment and further improving the feed balance.

[0028] The heating mechanism 4 consists of a heating ring 6 and a housing 8. The housing 8 is installed on the outer side of the upper end of the flow channel 2. The heating ring 6 is installed inside the housing 8 on the outer side of the flow channel 2. In the heating mechanism 4, the housing 8 is installed on the outer side of the upper end of the flow channel 2 to provide protection, avoid interference from the external environment to the heating components, and protect the operator from high temperature burns. The heating ring 6 inside the housing 8 acts directly on the outer side of the flow channel 2, providing continuous heat to the melt in the flow channel 2 by heating through electricity, maintaining the melt at a suitable flow temperature. A heat insulation plate 7 is provided between the heating ring 6 and the housing 8. The heat insulation plate 7 is installed on the inner side of the housing 8. The heat insulation plate 7 between the heating ring 6 and the housing 8 can effectively block the heat transfer to the housing 8, reduce heat loss, improve heating efficiency, ensure uniform and stable melt temperature in the flow channel 2, avoid melt flow differences caused by local cooling, and provide temperature protection for balanced feeding.

[0029] The working principle and usage process of this utility model are as follows: The flow channel 2 and the casting core 3 constitute the core conveying channel. The upper end of the casting core 3 is welded to the bottom end of the flow channel 2 to form an integral channel, ensuring the sealing and stability of the melt conveying path. The mounting seat 5 at the upper end of the flow channel 2 is used to fix the flow channel structure 1 to the corresponding position of the injection mold, ensuring the structural stability during operation. The conical funnel 9 at the upper end of the flow channel 2 acts as a melt guide, allowing the melt conveyed from the injection molding machine to enter the flow channel 2 in a concentrated and smooth manner, reducing pressure loss during melt diversion. The heating mechanism 4 at the upper end of the outer side of the flow channel 2 can heat and keep the melt entering the flow channel 2, preventing the melt from being damaged by heat. As the temperature decreases, the viscosity increases and the fluidity deteriorates. The guide cylinder 15 inside the flow channel 2 serves as a guide component for the melt flow. The spring 11 on its outer side cooperates with the baffle 13 to form an elastic adjustment structure. When the melt pressure increases, the guide cylinder 15 will compress the spring 11 and move downward, causing the guide needle 12 at the bottom end to slide downward inside the casting core 3, increasing the cross-sectional area of ​​the feed channel inside the casting core 3. When the melt pressure decreases, the spring 11 returns to its original position and pushes the guide cylinder 15 upward, and the guide needle 12 moves upward accordingly, reducing the cross-sectional area of ​​the feed channel. Through this dynamic adjustment, the melt feed pressure is balanced, ensuring uniform feeding in each cavity of the mold.

[0030] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A balanced feed injection mold runner structure, comprising a runner structure (1); characterized in that: The flow channel structure (1) consists of a flow channel (2) and a casting core (3). The upper end of the casting core (3) is welded to the bottom end of the flow channel (2). A mounting base (5) is installed at the upper end of the flow channel (2). A conical funnel (9) is installed at the upper end inside the flow channel (2). A heating mechanism (4) is installed at the upper end outside the flow channel (2). A guide tube (15) is installed inside the flow channel (2). A spring (11) is installed on the outside of the guide tube (15). The upper end of the spring (11) is installed on the outside of the upper end of the guide tube (15). The lower end of the spring (11) is installed on the upper end of the baffle (13). The baffle (13) is installed at the bottom end inside the flow channel (2). A guide needle (12) is installed at the bottom end of the guide tube (15). The guide needle (12) is slidably installed inside the casting core (3).

2. The balanced feed injection mold flow channel structure according to claim 1, characterized in that: The upper end of the guide tube (15) is equipped with an upper limit plate (10), which is slidably installed inside the flow channel (2).

3. The balanced feed injection mold flow channel structure according to claim 2, characterized in that: The upper limiting plate (10) is provided with a dynamic sealing ring (16), which is welded to the outside of the upper limiting plate (10).

4. The balanced feed injection mold flow channel structure according to claim 1, characterized in that: The bottom end of the guide needle (12) is provided with a bottom limiting plate (14), which is welded to the bottom end of the guide needle (12) and is slidably installed inside the casting core (3).

5. The balanced feed injection mold flow channel structure according to claim 1, characterized in that: The heating mechanism (4) consists of a heating ring (6) and a housing (8). The housing (8) is installed on the outer side of the upper end of the flow channel (2), and the heating ring (6) is installed inside the housing (8) on the outer side of the flow channel (2).

6. The balanced feed injection mold flow channel structure according to claim 5, characterized in that: A heat insulation plate (7) is provided between the heating ring (6) and the outer shell (8), and the heat insulation plate (7) is installed inside the outer shell (8).

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