Biomimetic spiral runner structure of mold cooling insert
By using a biomimetic spiral flow channel structure and a silicone ring limiting design, the problem that traditional insert cooling structures cannot adapt to differences in wall thickness has been solved, achieving efficient cooling and improved product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHUANGSITE PRECISION MACHINERY KUNSHAN CO LTD
- Filing Date
- 2025-06-10
- Publication Date
- 2026-06-09
AI Technical Summary
Traditional insert cooling structures cannot adapt to differences in wall thickness in different areas, resulting in low cooling efficiency and defects such as product warping and shrinkage marks.
It adopts a biomimetic spiral flow channel structure, combined with silicone ring limiting and gradually widening and narrowing design, to enhance the fluid turbulence intensity, adapt to differences in wall thickness, and improve the cooling effect.
It improves mold cooling efficiency, reduces product defects, and shortens the molding cycle.
Smart Images
Figure CN224334967U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of injection mold cooling, and more specifically, to a biomimetic spiral flow channel structure for mold cooling inserts. Background Technology
[0002] In the field of injection mold cooling, traditional insert cooling structures generally adopt drilled straight water channels or simple series loops. Such designs have inherent defects: for deep cavities, slender cores (L / D>8) and irregularly shaped inserts, straight water channels are difficult to closely follow the surface contour, resulting in sluggish heat dissipation in the end area (temperature difference often exceeds 15℃), which induces defects such as product warping and shrinkage marks. At the same time, the sudden increase in flow resistance and dead water area at right angle bends causes a decrease in cooling efficiency of about 30%.
[0003] Although the concept of spiral flow channels has emerged in the existing technology in an attempt to improve the conformal cooling effect, the existing technology is mostly limited to a single spiral structure with a constant cross section, which cannot adapt to the wall thickness differences in different areas of the insert. In particular, stress cracks are easily generated in thin-walled areas due to overcooling, while in thick-walled areas, the molding cycle is prolonged due to insufficient heat exchange. Utility Model Content
[0004] In order to overcome the above-mentioned defects of the prior art, this utility model provides a biomimetic spiral flow channel structure for mold cooling inserts.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a biomimetic spiral flow channel structure for a mold cooling insert, comprising a cavity mold base for workpiece forming, a protective shell connected to the outside of the cavity mold base, and a spiral flow channel groove formed on the outer wall of the cavity mold base. A plurality of circular grooves are evenly arranged on the inner wall of the spiral flow channel groove along its spiral path. A liquid inlet pipe is fixedly connected to the top outer wall of the protective shell, and the end of the liquid inlet pipe communicates with the spiral flow channel groove. A return pipe is fixedly connected to the bottom outer wall of the protective shell, and the end of the return pipe communicates with the spiral flow channel groove.
[0006] As a further improvement to the technical solution of this utility model, the bottom outer surface of the cavity mold base is provided with an external thread, and the bottom inner surface of the protective shell is provided with an internal thread that matches the external thread structure. The cavity mold base and the protective shell are connected by a thread.
[0007] As a further improvement to the technical solution of this utility model, a silicone ring is bonded to the inner surface of the protective shell located outside the cavity mold base.
[0008] As a further improvement to the technical solution of this utility model, the width of the spiral flow channel is set in an hourglass shape in the vertical section, with the middle narrow and the two sides wide. The depth of the spiral flow channel in the narrow part is less than the depth of the channel in the wide part.
[0009] As a further improvement to the technical solution of this utility model, the distance between the deepest part of the circular groove and the inner wall of the protective shell is not less than 3mm.
[0010] As a further improvement to the technical solution of this utility model, one end of the liquid inlet pipe is used to connect with the flange of the external water pump outlet pipe, and a sealing ring is provided on the outer wall of the protective shell at the connection point of the liquid inlet pipe.
[0011] As a further improvement to the technical solution of this utility model, one end of the return pipe is used to connect with the flange of the circulating water pipe that returns to the water storage tank from the outside, and a sealing ring is provided on the outer wall of the protective shell at the connection point of the return pipe.
[0012] The beneficial effects of this utility model are:
[0013] This invention utilizes the extrusion contact between a silicone ring and the outer surface of the mold cavity base. This allows the spiral flow channel groove on the outer surface of the mold cavity base to be confined by the silicone ring, forming a stable spiral channel. This facilitates the flow of subsequent cooling water. The spiral flow channel groove is designed in an hourglass shape in vertical cross-section, narrow in the middle and wider at both ends. The depth of the spiral flow channel groove in the narrow section is less than the depth of the groove in the wide section. This allows the circulating water to flow more rapidly within the spiral flow channel groove, and the multiple narrow spiral flow channel grooves result in a more efficient overall design. Due to the different flow velocities in the combined regions, the spiral flow channel design itself induces swirling flow in the cooling water, similar to a tornado effect. The gradually widening and narrowing flow channel further enhances the turbulence intensity between the fluid and the pipe wall, disrupting the laminar boundary layer near the pipe wall. This allows heat to be transferred from the metal to the cooling water more quickly, improving the cooling effect. The staggered width design can also adapt to the wall thickness differences in different areas of the insert. The circular grooves further increase the contact area between the spiral flow channel grooves and the cavity mold base, facilitating the removal of heat from the cavity mold base and improving the cooling effect. Attached Figure Description
[0014] Figure 1 This is a cross-sectional view of the present invention.
[0015] Figure 2 This is a schematic diagram of the spiral flow channel groove on the cavity mold base in this utility model.
[0016] Figure 3 This is a schematic diagram of the external structure of the spiral flow channel groove in this utility model.
[0017] The attached diagram is labeled as follows: 1. Cavity mold base; 2. Protective shell; 3. Spiral flow channel groove; 4. Circular groove; 5. Silicone ring; 6. External thread; 7. Inlet pipe; 8. Return pipe. Detailed Implementation
[0018] 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.
[0019] As attached Figure 1-3 The biomimetic spiral flow channel structure of the mold cooling insert shown includes a cavity mold base 1 for workpiece forming, a protective shell 2 connected to the outside of the cavity mold base 1, and a spiral flow channel groove 3 opened on the outer wall of the cavity mold base 1. Several circular grooves 4 are evenly arranged on the inner wall of the spiral flow channel groove 3 along the spiral path of the spiral flow channel groove 3. A liquid inlet pipe 7 is fixedly connected to the top outer wall of the protective shell 2, and the end of the liquid inlet pipe 7 is connected to the spiral flow channel groove 3. A return pipe 8 is fixedly connected to the bottom outer wall of the protective shell 2, and the end of the return pipe 8 is connected to the spiral flow channel groove 3.
[0020] As attached Figure 1-3 As shown, the bottom outer surface of the cavity mold base 1 is provided with an external thread 6, and the bottom inner surface of the protective shell 2 is provided with an internal thread that matches the structure of the external thread 6. The cavity mold base 1 and the protective shell 2 are connected by threads, which facilitates the connection and disassembly of the cavity mold base 1 and the protective shell 2.
[0021] As attached Figure 1 As shown, a silicone ring 5 is bonded to the inner surface of the protective shell 2 on the outside of the cavity mold base 1. During use, the silicone ring 5 is pressed against the outer surface of the cavity mold base 1, so that the spiral flow channel groove 3 on the outer surface of the cavity mold base 1 is limited by the silicone ring 5 to form a stable spiral channel, which facilitates the flow of subsequent cooling water.
[0022] As attached Figure 2-3 As shown, the spiral flow channel 3 has an hourglass-shaped structure in its vertical cross-section, narrow in the middle and wide at both ends. The depth of the spiral flow channel 3 in the narrow section is less than that in the wide section, which facilitates the flow of circulating water within the spiral flow channel 3. The narrower spiral flow channel 3 can increase the flow velocity, and the multiple narrower spiral flow channel 3s result in different flow velocities across the entire area. The spiral flow channel design itself induces swirling flow in the cooling water, similar to a tornado effect. The gradually widening and narrowing flow channel further enhances the turbulence intensity between the fluid and the pipe wall, destroying the laminar boundary layer near the pipe wall, allowing heat to be transferred from the metal to the cooling water more quickly, thus improving the cooling effect.
[0023] The distance between the deepest part of the circular groove 4 and the inner wall of the protective shell 2 is not less than 3mm. This increases the structural strength of the product, prevents deformation and damage when the shell is thin, and does not affect the cooling effect.
[0024] One end of the inlet pipe 7 is used to connect with the flange of the outlet pipe of the external water pump. A sealing ring is provided on the outer wall of the protective shell 2 at the connection point of the inlet pipe 7. One end of the return pipe 8 is used to connect with the flange of the circulating water pipe that returns to the water storage tank. A sealing ring is provided on the outer wall of the protective shell 2 at the connection point of the return pipe 8. This facilitates the installation of the inlet pipe 7 and the return pipe 8 and makes it easy to form an inlet and outlet loop with the external circulating water system.
[0025] It should be noted that in practical applications, the structure of the cavity mold base 1 is not limited to the structure of the cavity mold base 1 designed in this scheme. If the insert in the cavity is of other shapes, the shape of the overall cavity mold base 1 can be changed to a cone, trapezoid or other shapes. It is only necessary to ensure that the structure of the spiral flow channel 3 and the circular groove 4 designed in this scheme is applicable, and other assembly structures remain unchanged.
[0026] Working principle: This utility model designs a biomimetic spiral flow channel structure for mold cooling inserts, the specific structure of which is shown in the attached instruction manual. Figure 1-3 As shown, in this technical solution, the cavity mold base 1 and the protective shell 2 are connected by threads, which facilitates the connection and disassembly of the cavity mold base 1 and the protective shell 2. A silicone ring 5 is bonded to the inner surface of the protective shell 2, located outside the cavity mold base 1. During use, the silicone ring 5 presses against the outer surface of the cavity mold base 1, causing the spiral flow channel 3 on the outer surface of the cavity mold base 1 to form a stable spiral channel, which facilitates the flow of subsequent cooling water. During use, the inlet pipe 7 and the return pipe are connected to the external circulating water system. The spiral flow channel 3 has an hourglass-shaped structure in its vertical cross-section, narrow in the middle and wide at both ends. The depth of the spiral flow channel 3 in the narrow section is less than... The depth of the wide section of the channel facilitates the flow of circulating water within the spiral channel 3. The narrower sections of the spiral channel 3 increase the flow velocity, and the multiple narrower sections of the spiral channel 3 result in varying flow velocities across the entire region. The spiral channel design itself induces swirling flow in the cooling water, similar to a tornado effect. The gradually widening and narrowing channel further enhances the turbulence intensity between the fluid and the pipe wall, disrupting the laminar boundary layer near the pipe wall. This allows heat to be transferred from the metal to the cooling water more quickly, improving the cooling effect. Furthermore, the circular groove 4 further increases the contact area between the spiral channel 3 and the cavity mold base 1, facilitating the removal of heat from the cavity mold base 1 and improving the cooling effect.
[0027] In the accompanying drawings of the embodiments disclosed in this utility model, only the structures involved in the embodiments of this utility model are shown. Other structures can be referred to with ordinary design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.
[0028] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A biomimetic spiral flow channel structure for a mold cooling insert, comprising a cavity mold base (1) for workpiece forming, characterized in that: The cavity mold base (1) is externally connected to a protective shell (2), and the outer wall of the cavity mold base (1) is provided with a spiral flow channel groove (3). The inner wall of the spiral flow channel groove (3) is uniformly provided with several circular grooves (4) along the spiral path of the spiral flow channel groove (3). The top outer wall of the protective shell (2) is fixedly connected to an inlet pipe (7), the end of the inlet pipe (7) is connected to the spiral flow channel groove (3), and the bottom outer wall of the protective shell (2) is fixedly connected to a return pipe (8), the end of the return pipe (8) is connected to the spiral flow channel groove (3).
2. The biomimetic spiral flow channel structure of the mold cooling insert according to claim 1, characterized in that: The bottom outer surface of the cavity mold base (1) is provided with an external thread (6), and the bottom inner surface of the protective shell (2) is provided with an internal thread that matches the structure of the external thread (6). The cavity mold base (1) and the protective shell (2) are connected by threads.
3. The biomimetic spiral flow channel structure of the mold cooling insert according to claim 1, characterized in that: The inner surface of the protective shell (2) is bonded with a silicone ring (5) on the outside of the cavity mold base (1).
4. The biomimetic spiral flow channel structure of the mold cooling insert according to claim 1, characterized in that: The width of the spiral flow channel (3) is set in an hourglass shape on the vertical section, with the middle narrow and the two sides wide. The depth of the spiral flow channel (3) in the narrow part is less than the depth of the channel in the wide part.
5. The biomimetic spiral flow channel structure of the mold cooling insert according to claim 1, characterized in that: The distance between the deepest part of the circular groove (4) and the inner wall of the protective shell (2) is not less than 3mm.
6. The biomimetic spiral flow channel structure of the mold cooling insert according to claim 1, characterized in that: One end of the inlet pipe (7) is used to connect with the flange of the outlet pipe of the external water pump, and a sealing ring is provided on the outer wall of the protective shell (2) at the connection point of the inlet pipe (7).
7. The biomimetic spiral flow channel structure of the mold cooling insert according to claim 1, characterized in that: One end of the return pipe (8) is used to connect with the flange of the circulating water pipe that returns to the water storage tank from the outside. A sealing ring is provided on the outer wall of the protective shell (2) at the connection point of the return pipe (8).