A hot runner assembly
By employing arc-shaped guide channels and asymmetric Y-shaped bifurcation structures in the hot runner assembly, combined with rotating connections and sealing designs, the complexity of double-layer channel processing and the problem of glue seepage are solved, achieving more efficient plastic melt flow and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI ESU LASER TECH CO LTD
- Filing Date
- 2025-08-07
- Publication Date
- 2026-07-21
AI Technical Summary
Existing double-layer flow channel processing methods are complex, require high precision, and are prone to defects such as gaps and glue seepage, which affect the color change performance and operational stability of the hot runner system.
The guide channel adopts an arc-shaped transition structure, with inserts embedded in the body of the splitter plate. Combined with an asymmetric Y-shaped bifurcation structure and a rotating connection design, components such as rotating bearings, positioning pins, and sealing rings are used to ensure the stability and sealing of the channel.
Reduce flow resistance, improve the flow accuracy of plastic melt, avoid gaps and glue seepage, reduce processing difficulty, and improve color change performance and usage stability.
Smart Images
Figure CN224527886U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of fluid splitting and transport, and in particular to a hot runner assembly. Background Technology
[0002] Hot runner manifolds play a vital role in the plastic molding industry. With the continuous development of the plastics processing industry, the performance and efficiency requirements of hot runner systems are also increasing. Hot runner manifolds can precisely control the flow of molten plastic, reduce plastic waste, improve the molding quality and production efficiency of plastic products, and are widely used in various plastic molds, driving the plastics processing industry towards greater efficiency and precision.
[0003] In existing hot runner manifolds, when the flow channel has a double-layer structure, inserts are typically used to address the issue of flow channel misalignment. For double-layer flow channels, a splicing method is generally employed during manufacturing. This method involves first machining the insert features separately, and then splicing them together to machine the overall shape. Furthermore, inserts are also used to achieve a misaligned flow channel design to meet the requirements of a double-layer flow channel. These methods have been widely used in past production and are standard practices in the industry for solving similar problems.
[0004] However, existing double-layer runner processing methods have significant drawbacks. The splicing process is complex and requires high precision, leading to significant processing difficulties. Moreover, due to machining tolerances, discontinuities can occur at the spliced runners, and these discontinuities can create dead zones that affect the color-changing performance of the hot runner system. In addition, there is a risk of adhesive seepage at the splicing points due to precision issues, affecting the normal operation of the hot runner system. Utility Model Content
[0005] To address the problem of double-layer flow processing in the prior art, this application provides a hot runner assembly.
[0006] This application provides a hot runner assembly, which adopts the following technical solution: A hot runner assembly includes a manifold body and an insert. The insert is embedded in the manifold body, which has a main flow channel and a lower flow channel. The insert has a guide flow channel, which is an arc-shaped transition flow channel structure. One end of the guide flow channel is connected to the main flow channel, and the other end of the guide flow channel is connected to the lower flow channel.
[0007] By adopting the above technical solution, the insert is embedded in the body of the manifold, and the guide channel is an arc-shaped transition channel structure, which can make the plastic melt smoothly transition between the main channel and the lower channel, reduce flow resistance, accurately control the flow of the plastic melt, reduce plastic waste, improve the molding quality and production efficiency of plastic products, and avoid the problems of discontinuity caused by spliced channels affecting color change performance and glue seepage.
[0008] Preferably, there are two lower flow channels, and the guide flow channel has an asymmetrical Y-shaped bifurcation structure. The guide flow channel is provided with one guide inlet and two guide outlets. The guide inlet is connected to the main flow channel inlet, and the two guide outlets are connected to the two lower flow channels.
[0009] By adopting the above technical solution, the hot runner assembly can utilize the asymmetric Y-shaped bifurcated guide channel to allow the plastic melt to enter from one guide inlet and flow into two lower channels through two guide outlets respectively. This achieves more reasonable distribution of the plastic melt, precise control of the plastic melt flow, reduces plastic waste, improves the molding quality and production efficiency of plastic products, avoids the discontinuity and glue seepage problems caused by the splicing of existing double-layer channels, and reduces processing difficulty.
[0010] Preferably, the guide inlet is located above the two guide outlets, the guide channel is vertically arranged in the middle, the insert includes a first insert and a second insert, the guide inlet is located on the first insert, both guide outlets are located on the second insert, the first insert and the second insert are rotatably connected, and the rotation axis is vertically arranged, the rotatable connection between the first insert and the second insert is located in the middle of the guide channel.
[0011] By adopting the above technical solution, the guide inlet is located above the two guide outlets and vertically set in the middle of the guide channel, which facilitates the smooth flow of the plastic melt from the guide inlet to the guide outlet under the action of gravity. The insert is divided into a first insert and a second insert, with the guide inlet and guide outlet located on different inserts respectively. The first insert and the second insert are rotatably connected, with the rotation axis vertical and the rotation connection located in the middle of the guide channel. This allows for flexible adjustment of the discharge direction of the guide channel to adapt to different plastic molding requirements. At the same time, it avoids the problems of discontinuity and glue seepage caused by splicing processing, and improves the color change performance and usage stability of the hot runner system.
[0012] Preferably, a rotating bearing is provided between the first insert and the second insert, the inner ring of the rotating bearing is fixedly connected to the first insert, the outer ring of the rotating bearing is fixedly connected to the second insert, and the diameter of the middle part of the guide channel matches the diameter of the inner ring of the bearing.
[0013] By adopting the above technical solution, the first insert and the second insert are rotatably connected and the rotation axis is set vertically, which can flexibly adjust the direction of the flow channel. A rotating bearing is set between the first insert and the second insert, and the inner ring of the rotating bearing is fixedly connected to the first insert and the outer ring is fixedly connected to the second insert. The diameter of the middle part of the guide flow channel matches the diameter of the inner ring of the bearing, which can make the first insert and the second insert rotate more smoothly and ensure the connectivity of the guide flow channel and the stability of the melt flow.
[0014] Preferably, the first insert and the second insert are provided with positioning holes along the rotation axis, the positioning holes penetrate the first insert and the second insert, and the positioning holes are provided with positioning pins.
[0015] By adopting the above technical solution, positioning holes and positioning pins are set on the first insert and the second insert along the rotation axis, which can accurately position the rotation position of the first insert and the second insert, ensuring the stability of the guide channel and the flow accuracy of the plastic melt.
[0016] Preferably, the distributor plate body is provided with mounting holes, and the insert forms an interference fit with the mounting holes.
[0017] By adopting the above technical solution, the insert and the mounting hole of the manifold body form an interference fit, so that the insert is firmly embedded in the manifold body, avoiding the insert from loosening and ensuring the stable operation of the hot runner system. At the same time, no splicing processing is required, which solves the problems of complex splicing processing, high precision requirements, easy breakage and glue seepage, and improves the performance and service life of the hot runner system.
[0018] Preferably, the diverter plate body is provided with anti-rotation pins, which are all horizontally arranged, and the diverter plate body is provided with anti-rotation grooves for fixing the anti-rotation pins.
[0019] By adopting the above technical solution, horizontal anti-rotation pins are set on the manifold body, and anti-rotation grooves are set to fix the anti-rotation pins. This can prevent the inserts from rotating inside the manifold body, ensure the stability of the hot runner assembly structure, ensure the normal flow of plastic melt in the main flow channel, guide flow channel and lower flow channel, and avoid the flow channel misalignment caused by the rotation of the inserts, which would affect the performance of the hot runner system.
[0020] Preferably, a sealing ring is also provided in the guide channel at the connection between the first insert and the second insert.
[0021] By adopting the above technical solution, a sealing ring is set in the guide channel at the connection between the first insert and the second insert, which can further prevent the leakage of plastic melt in the guide channel, ensure the normal use of the hot runner system, and improve the sealing performance and reliability of the hot runner manifold.
[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. The guide channel has a circular arc transition channel structure, which avoids the discontinuity and dead corners of spliced channels and improves the color change performance of the hot runner system; 2. The insert is embedded in the body of the manifold, avoiding the risk of glue seepage caused by precision issues in the splicing insert, and ensuring the normal use of the hot runner system; 3. The way the insert is combined with the main body of the diverter simplifies the manufacturing process, reduces the requirements for machining accuracy, and reduces the difficulty of machining. Attached Figure Description
[0023] Figure 1 This is an isometric schematic diagram of the main overall structure in the embodiments of this application; Figure 2 This is a cross-sectional view of the main overall structure in the embodiments of this application; Figure 3 This is a schematic diagram of the structure of the insert in the embodiment of this application.
[0024] Reference numerals in the attached drawings: 1. Diverter plate body; 2. Insert; 21. First insert; 22. Second insert; 3. Guide channel; 4. Main channel; 5. Lower channel; 6. Guide inlet; 7. Guide outlet; 8. Rotary bearing; 9. Positioning hole; 10. Positioning pin; 11. Mounting hole; 12. Anti-rotation pin; 13. Anti-rotation groove; 14. Sealing ring. Detailed Implementation
[0025] The following is in conjunction with the appendix Figure 1 -Appendix Figure 3 This application will be described in further detail.
[0026] This application discloses a hot runner assembly.
[0027] Reference Figure 1 and Figure 2 A hot runner assembly includes a manifold body 1 and an insert 2. The insert 2 is embedded in the manifold body 1 and has a guide channel 3. The manifold body 1 has a main channel 4 and a lower channel 5. The guide channel 3 on the insert 2 connects the main channel 4 and the lower channel 5 in the manifold body 1. This structure allows the plastic melt to flow smoothly from the main channel 4 through the guide channel 3 into the lower channel 5, avoiding the discontinuity and glue seepage problems caused by traditional spliced channels, and improving the performance of the hot runner system.
[0028] Reference Figure 1 and Figure 2The manifold body 1 is the main part of the hot runner manifold, providing a basic support structure for the flow of molten plastic. The manifold body 1 is usually made of high-strength, high-temperature resistant metal materials, such as stainless steel, to ensure stable operation under high-temperature and high-pressure working environments. The main runner 4 is used to introduce the molten plastic into the manifold body 1, while the lower runner 5 further distributes the melt to various molding parts.
[0029] Reference Figure 1 and Figure 2 The guide channel 3 has an arc-shaped transition channel structure. This arc-shaped design of the guide channel 3 can reduce the resistance of the plastic melt during the flow process, allowing the melt to flow more smoothly from the main channel 4 into the lower channel 5.
[0030] Reference Figure 1 and Figure 2 The lower flow channel 5 is configured with two channels, and the guide flow channel 3 has an asymmetrical Y-shaped bifurcation structure. The guide flow channel 3 is equipped with one guide inlet 6 and two guide outlets 7. The guide inlet 6 is connected to the inlet of the main flow channel 4, and the two guide outlets 7 are connected to the two lower flow channels 5. This asymmetrical Y-shaped bifurcation structure of the guide flow channel 3 can rationally distribute the plastic melt into the two lower flow channels 5 according to different production needs.
[0031] Reference Figure 1 and Figure 2 The guide inlet 6 is located above the two guide outlets 7, and the guide channel 3 is vertically positioned in the middle. The insert 2 includes a first insert 21 and a second insert 22. The guide inlet 6 is located on the first insert 21, and the two guide outlets 7 are both located on the second insert 22. The first insert 21 and the second insert 22 are rotatably connected, and the axis of rotation is vertically positioned. The rotatable connection between the first insert 21 and the second insert 22 is located in the middle of the guide channel 3. This rotatable connection design allows the direction of the guide channel 3 to be adjusted, thereby flexibly changing the flow direction of the plastic melt according to the actual production situation.
[0032] Reference Figure 2 and Figure 3 A rotary bearing 8 is provided between the first insert 21 and the second insert 22. The inner ring of the rotary bearing 8 is fixedly connected to the first insert 21, and the outer ring of the rotary bearing 8 is fixedly connected to the second insert 22. The diameter of the middle part of the guide channel 3 matches the diameter of the inner ring of the bearing. The use of the rotary bearing 8 ensures smooth rotation between the first insert 21 and the second insert 22, and also improves the stability of the connection. When selecting the rotary bearing 8, the appropriate model and specification should be selected according to the working environment and load of the hot runner manifold. Matching the diameter of the middle part of the guide channel 3 with the diameter of the inner ring of the bearing allows the melt to flow more smoothly in the guide channel 3, avoiding jamming.
[0033] Reference Figure 1 and Figure 2 The insert 2 has positioning holes 9 arranged opposite each other along the rotation axis. The positioning holes 9 penetrate the first insert 21 and the second insert 22, and positioning pins 10 are installed in the positioning holes 9. The cooperation between the positioning pins 10 and the positioning holes 9 can fix the first insert 21 and the second insert 22 after they have rotated to the appropriate position, preventing accidental rotation during operation and ensuring the stable operation of the hot runner manifold. The positioning pins 10 can be different types such as cylindrical pins and tapered pins, selected according to specific application requirements.
[0034] Reference Figure 1 and Figure 2 The diffuser body 1 has mounting holes 11, and the insert 2 forms an interference fit with the mounting holes 11. The interference fit ensures that the insert 2 is firmly fixed in the diffuser body 1, preventing the insert 2 from loosening during operation. When installing the insert 2, methods such as heated installation or cold installation can be used to ensure the effectiveness of the interference fit.
[0035] Reference Figure 1 and Figure 2 Anti-rotation pins 12 are horizontally arranged on the diverter body 1, and anti-rotation grooves 13 are provided on the diverter body 1 to fix the anti-rotation pins 12. The anti-rotation pins 12 and anti-rotation grooves 13 can prevent the insert 2 from rotating within the diverter body 1, further improving the stability of the insert 2. The anti-rotation pins 12 can be made of different shapes such as cylindrical pins and square pins, depending on the structure and usage requirements of the diverter body 1.
[0036] Reference Figure 1 and Figure 2 A sealing ring 14 is also provided in the guide channel 3 at the connection between the first insert 21 and the second insert 22. The sealing ring 14 is fixedly installed on the first insert 21. The function of the sealing ring 14 is to prevent the plastic melt from leaking from the connection between the first insert 21 and the second insert 22, and to ensure the sealing performance of the hot runner system. The sealing ring 14 can be made of materials such as rubber or silicone, and has good elasticity and sealing performance.
[0037] The implementation principle of this application embodiment is as follows: by embedding the insert 2 into the manifold body 1 and connecting the main flow channel 4 and the lower flow channel 5 using the guide channel 3, the complex processing and glue seepage problems of traditional spliced flow channels are avoided. The arc-shaped design and asymmetrical Y-shaped bifurcation structure of the guide channel 3 enable the plastic melt to flow more smoothly and be rationally distributed. The rotating connection design of the first insert 21 and the second insert 22 increases the adjustability of the flow channel direction to meet different production needs. The setting of components such as the rotating bearing 8, the positioning pin 10, the anti-rotation pin 12, and the sealing ring 14 further improves the stability and sealing of the hot runner manifold, and enhances the performance and reliability of the entire hot runner system. Compared with the prior art, there are significant improvements in terms of processing difficulty, color change performance, and usage stability.
[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A hot runner assembly, characterized in that: The device includes a manifold body (1) and an insert (2). The insert (2) is embedded in the manifold body (1). The manifold body (1) has a main flow channel (4) and a lower flow channel (5). The insert (2) has a guide flow channel (3). The guide flow channel (3) is an arc-shaped transition flow channel structure. One end of the guide flow channel (3) is connected to the main flow channel (4), and the other end of the guide flow channel (3) is connected to the lower flow channel (5).
2. A hot runner assembly according to claim 1, characterized in that: The lower flow channel (5) is configured as two, and the guide flow channel (3) is an asymmetrical Y-shaped bifurcation structure. The guide flow channel (3) is provided with a guide inlet (6) and two guide outlets (7). The guide inlet (6) is connected to the inlet of the main flow channel (4), and the two guide outlets (7) are connected to the two lower flow channels (5).
3. A hot runner assembly according to claim 2, characterized in that: The guide feed inlet (6) is located above the two guide discharge outlets (7). The guide flow channel (3) is vertically arranged in the middle. The insert (2) includes a first insert (21) and a second insert (22). The guide feed inlet (6) is located on the first insert (21). The two guide discharge outlets (7) are both located on the second insert (22). The first insert (21) and the second insert (22) are rotatably connected, and the rotation axis is vertically arranged. The rotatable connection between the first insert (21) and the second insert (22) is located in the middle of the guide flow channel (3).
4. A hot runner assembly according to claim 3, characterized in that: A rotating bearing (8) is provided between the first insert (21) and the second insert (22). The inner ring of the rotating bearing (8) is fixedly connected to the first insert (21), and the outer ring of the rotating bearing (8) is fixedly connected to the second insert (22). The diameter of the middle part of the guide channel (3) matches the diameter of the inner ring of the bearing.
5. A hot runner assembly according to claim 4, characterized in that: The first insert (21) and the second insert (22) are provided with positioning holes (9) opposite each other along the rotation axis. The positioning holes (9) penetrate the first insert (21) and the second insert (22). A positioning pin (10) is provided in the positioning hole (9).
6. A hot runner assembly according to claim 1, characterized in that: The main body (1) of the diverter plate is provided with a mounting hole (11), and the insert (2) forms an interference fit with the mounting hole (11).
7. A hot runner assembly according to claim 1, characterized in that: The diverter plate body (1) is provided with anti-rotation pins (12) opposite to each other. The anti-rotation pins (12) are all horizontally arranged. The diverter plate body (1) is provided with anti-rotation grooves (13) for fixing the anti-rotation pins (12).
8. A hot runner assembly according to claim 3, characterized in that: A sealing ring (14) is also provided in the guide channel (3) at the connection between the first insert (21) and the second insert (22).