Improved Y-shaped runner structure
The improved Y-shaped flow channel structure solved the flow imbalance problem caused by frictional heat generation in the flow channel, thus improving product quality and molding efficiency.
Patent Information
- Application Number
- CN202520278566.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2035-02-21
AI Technical Summary
The frictional heat generated by conventional flow channel design leads to flow imbalance, resulting in backflow, which affects product quality and molding efficiency.
An improved Y-shaped flow channel structure is adopted, including a direct flow section, symmetrically arranged branching sections and confluence sections. The material flow turns at the branching and confluence sections to improve uneven temperature distribution and increase flow velocity.
By improving temperature distribution, the problem of flow imbalance was solved, thereby improving product quality and molding efficiency.
Smart Images
Figure CN223812287U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to injection molding technical field, specifically, relate to an improved runner design for solving the problem of flow imbalance caused by heat generation due to friction when the conventional runner flows. BACKGROUND
[0002] In the injection molding process, the runner will generally enter the cavity after turning, to prevent the flow rate of the flowing material from being too fast when entering the gate and affecting the injection molding effect. Therefore, in the injection molding process, the structure and shape of the runner need to be designed. In conventional runner design, the runner is generally designed in the shape of "7" (such as Figure 1 ), which controls the flow rate through a single turn. However, this design of the runner causes heat to be generated due to friction when the material flows, resulting in the temperature of the material on the outside of the runner being higher than that of the middle part. This temperature difference causes the flow rate of the middle part to be slower than that of the outside, forming a so-called "backpack" phenomenon, which affects the quality and molding efficiency of the product. SUMMARY
[0003] The utility model discloses an improved Y-shaped runner structure, aiming at solving the above-mentioned problems.
[0004] The utility model adopts the following scheme:
[0005] An improved Y-shaped runner structure comprises: a straight section connected to a feed inlet, the end of the straight section is connected to symmetrically arranged first and second branch sections to divide the flow, and the first and second branch sections and the straight section form a Y-shaped runner structure; the other end of the first and second branch sections is connected to the same converging section, and the flow is adapted to turn again at the connection between the first and second branch sections and the converging section to converge at the gate.
[0006] Further, the gate is located at the middle position of the converging section.
[0007] Further, the branching angle of the first and second branch sections is 80°-120°.
[0008] Further, the discharge port of the converging section is perpendicular to the direction of the gate.
[0009] Further, the converging section is located below the first and second branch sections.
[0010] Advantages:
[0011] This solution utilizes a Y-shaped flow channel structure. During injection molding, when the material exits the straight section of the Y-shaped flow channel, the outer side is hotter than the middle. After splitting, the outer sides of the two split sections maintain a high temperature, while the inner sides remain cold. When the flow material tumbles at the junction of the confluence section, the originally hot outer portion becomes the middle portion, resulting in a high temperature in the middle and low temperatures on both sides. Because the high-temperature portion has low viscosity and a high flow velocity, this design improves the original backflow problem. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of an existing injection molding runner structure;
[0013] Figure 2 This is a schematic diagram of an improved Y-shaped flow channel structure with the product in this embodiment;
[0014] Figure 3 This is a schematic diagram of an improved Y-shaped flow channel structure in this embodiment;
[0015] Figure 4 This is a schematic diagram of the material flow path of an improved Y-shaped flow channel structure in this embodiment;
[0016] Figure reference numerals: Y-shaped flow channel structure 10, direct flow section 1, first branch section 2, second branch section 3, confluence section 4, gate 5, feed inlet 6. Detailed Implementation
[0017] Combination Figure 2 As shown, this embodiment provides an injection mold, including an improved Y-shaped runner structure 10.
[0018] Combination Figures 2 to 4 As shown, the improved Y-shaped flow channel structure 10 includes: a direct flow section 1 connected to the feed inlet 6, the end of the direct flow section 1 being connected to a symmetrically arranged first branch section 2 and second branch section 3 to divide the material flow, and the first branch section 2, the second branch section 3 and the direct flow section 1 forming a Y-shaped flow channel structure; the other ends of the first branch section 2 and the second branch section 3 are connected to the same confluence section 4, and the material flow is adapted to turn again at the connection of the first branch section 2, the second branch section 3 and the confluence section 4 to converge at the gate 5, and the material flow is contained within the confluence section 4.
[0019] like Figure 4As shown, in the embodiment, the straight flow section 1 is adapted to communicate with the feeding port 6, and the material flow is adapted to enter from the vertical direction of the straight flow section 1, and after entering, the material flow flows in the straight flow section 1, and since the outside of the flow channel will generate heat due to friction during flowing, the material flow out of the straight flow section 1 has high temperature on the outside and low temperature in the middle. The end of the straight flow section 1 is bifurcated to form a first flow branch section 2 and a second flow branch section 3 which communicate with the straight flow section 1, so that the material flow in the straight flow section 1 is bifurcated into two flows at the connection to continue flowing in the two flow branch sections. Here, the flow cross section of the first flow branch section 2 and the second flow branch section 3 is smaller than that of the straight flow section 1, and the bifurcation angle of the first flow branch section 2 and the second flow branch section 3 is 80°-120°, so that the material flow in the straight flow section 1 can be bifurcated into two flows gently to flow in the first flow branch section 2 and the second flow branch section 3. The material flow in the first flow branch section 2 and the second flow branch section 3 keeps the state of high temperature on the outside and low temperature in the middle. As shown in the figure, Figure 4 As shown, the dashed arrow represents the low-temperature material flow, and the solid arrow represents the high-temperature material flow.
[0020] The converging flow section 4 is connected at the end of the first flow branch section 2 and the second flow branch section 3, and the converging flow section 4 is located below the first flow branch section 2 and the second flow branch section 3, so that the material flow can be turned over in the converging flow section 4 to become high temperature in the middle and low temperature on both sides, and the high-temperature middle part,
[0021] low, and the flow will be faster naturally, so as to improve the original reverse wrapping problem. The gate 5 is arranged at the middle position of the converging flow section 4, and the material outlet of the converging flow section 4 is perpendicular to the direction of the gate, so that the material flow of the gate 5 can be turned over better. As shown in the figure, Figure 4 As shown, the dashed arrow represents the low-temperature material flow, and the solid arrow represents the high-temperature material flow.
[0022] By the embodiment, the phenomenon that the injection molding product is prone to reverse wrapping caused by the unreasonable flow channel structure can be effectively improved; the optimized flow channel design reduces the unevenness in the molding process, and improves the production efficiency.
[0023] It should be understood that: the above is only the preferred embodiment of the present application, the protection scope of the present application is not limited to the above-mentioned embodiments, and any technical solution falling within the idea of the present application belongs to the protection scope of the present application.
[0024] The above introduction of the drawings used in the embodiments only shows some embodiments of the present application, and should not be regarded as the limitation of the scope, and for ordinary skilled in the art, other related drawings can be obtained from the drawings without creative labor.
Claims
1. An improved Y-shaped flow channel structure, characterized by, The application relates to a runner system for a plastic injection molding machine, comprising: a straight section connected with a feeding port, the straight section being connected with symmetrically arranged first and second branch sections at the ends of the straight section to branch the flow, and the first and second branch sections and the straight section forming a Y-shaped flow channel structure; the other ends of the first and second branch sections being connected with a same collecting section, and the flow being adapted to turn again at the connection of the first and second branch sections and the collecting section to converge at a gate.
2. The improved Y-shaped flow channel structure according to claim 1, wherein The gate is located at the middle position of the collecting section.
3. The improved Y-shaped flow channel structure according to claim 1, wherein The branching angle of the first and second branch sections is 80-120 DEG.
4. The improved Y-shaped flow channel structure according to claim 1, wherein The discharge port of the collecting section is perpendicular to the direction of the gate.
5. The improved Y-shaped flow channel structure according to claim 1, wherein The collecting section is located below the first and second branch sections.