Splitter plate of hot runner system
By setting obstruction structures and isolation sections between the upper and lower plates of the hot runner system's manifold, and connecting them using diffusion welding technology, the problems of flow channel balance and flow consistency are solved, achieving high-precision and stable flow of polymer materials and improving product quality.
Patent Information
- Application Number
- CN202423321224.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Existing hot runner systems with manifolds are unable to meet the requirements for consistency and flow balance of polymer materials in the molten state, resulting in poor product quality.
The diffusion welding process is used to weld the machined surfaces of the upper and lower plates together to form a flow channel including a barrier structure. By setting upper and lower flow channel troughs and isolation parts in the flow channel, the flow direction of the polymer material is changed to ensure uniform flow.
It improves the processing precision and flow stability of the flow channel, reduces product defects caused by uneven flow, and enhances the overall quality of polymer materials.
Smart Images
Figure CN223630873U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to hot runner technology field especially relates to a hot runner system's shunt plate. BACKGROUND
[0002] In the high polymer material processing industry, hot runner system because it can keep the consistency of the melt flow and reduce material waste and other advantages and get wide application, at present, many application fields for the quality requirement of high polymer material product is higher and higher, for processing precision, control precision etc. have reached um level, however, due to subtle difference, it is very difficult to control the consistency of the melt flow of this high polymer material.
[0003] The traditional runner processing method adopts gun drill form to shunt plate and processes runner, this method is difficult to meet the product requirement of present, so the processing method of runner is improved, cancels gun drill processing, and adopts diffusion welding manufacturing method, aims at making the precision of runner higher, however, in practical application, still cannot satisfy the higher balance requirement of runner. UTILITY MODEL CONTENT
[0004] In view of the problems in the background art, the utility model aims at providing a hot runner system's shunt plate, which solves the problem that the existing shunt plate cannot meet the product demand of high flow balance.
[0005] To achieve this purpose, the utility model adopts the following technical scheme:
[0006] A hot runner system's shunt plate, including plate body and the runner shaped in the inside of plate body, the plate body includes upper plate body and lower plate body;
[0007] The bottom surface of the upper plate body has a first processing surface, the first processing surface is provided with an upper layer runner groove group, the top surface of the lower plate body has a second processing surface, the second processing surface is provided with a lower layer runner groove group, the first processing surface and the second processing surface are welded and connected, the upper layer runner groove group and the lower layer runner groove group cooperate to form the runner, the runner is provided with an obstacle structure along the vertical direction, and the obstacle is used to change the flow direction of material in the runner;
[0008] The upper plate body is provided with an input end, the input end penetrates the upper plate body, the input end is arranged at the starting end of the runner and communicates with the runner, and the lower plate body is provided with an output end, the output end penetrates the lower plate body, the output end is arranged at the end of the runner and communicates with the runner.
[0009] Preferably, the upper layer flow channel groove set comprises, from the start end to the end of the flow channel, an upper layer first groove, an upper layer second groove and an upper layer third groove in sequence, and an upper layer flow channel separation part is arranged between the upper layer first groove and the upper layer second groove; the lower layer flow channel groove set comprises, from the start end to the end of the flow channel, a lower layer first groove, a lower layer second groove and a lower layer third groove in sequence, and a lower layer flow channel separation part is arranged between the lower layer second groove and the lower layer third groove; the upper layer flow channel separation part and the lower layer flow channel separation part are the obstruction structure.
[0010] When the upper layer flow channel groove set and the lower layer flow channel groove set are combined into the flow channel, the upper layer first groove and the lower layer first groove form a first flow channel section, the upper layer third groove and the lower layer third groove form a third flow channel section, the upper layer flow channel separation part is located above the lower layer second groove, and the lower layer flow channel separation part is located below the upper layer second groove.
[0011] The start end of the first flow channel section is in communication with the input end, the end of the first flow channel section is in communication with the start end of the lower layer second groove, the end of the lower layer second groove is in communication with the start end of the upper layer second groove, the end of the upper layer second groove is in communication with the start end of the third flow channel section, and the end of the third flow channel section is in communication with the output end.
[0012] Preferably, the bottom of the upper layer flow channel separation part is at the same horizontal plane as the first machining surface.
[0013] The top of the lower layer flow channel separation part is at the same horizontal plane as the second machining surface.
[0014] Preferably, the groove depth of the upper layer first groove is 1 / 2D, the groove depth of the upper layer third groove is 1 / 2D, and the groove depth of the upper layer second groove is D; the upper layer second groove and the upper layer third groove are transitioned through an arc surface.
[0015] The groove depth of the lower layer first groove is 1 / 2D, the groove depth of the lower layer third groove is 1 / 2D, and the groove depth of the lower layer second groove is D; the lower layer first groove and the lower layer second groove are transitioned through an arc surface.
[0016] Preferably, the length of the upper layer first groove is L1, the sum of the lengths of the lower layer first groove and the lower layer second groove is L2, and the width of the bottom of the upper layer flow channel separation part is the same as the width of the top of the lower layer flow channel separation part, which is Lm, wherein Lm=1 / 2D; L2=L1+Lm+D.
[0017] Preferably, the length of the upper layer second groove is L12, and the length of the lower layer second groove is L22, wherein L12=2D and L22=5 / 3D.
[0018] Preferably, the plate body is internally provided with a plurality of flow channels, starting ends of the plurality of flow channels are located at the same position, the starting ends of the plurality of flow channels are communicated with the same input end, and ending ends of the plurality of flow channels are not interfered with each other.
[0019] Preferably, the upper plate body and the lower plate body are both provided with heating portions, and the heating portion of the upper plate body is correspondingly arranged with the heating portion of the lower plate body.
[0020] Compared with the prior art, one of the above technical solutions has the following beneficial effects:
[0021] By opening the groove in different plate bodies and combining the grooves into flow channels including the blocking structure after connecting the plate bodies, the flow speed of the polymer material in the flow channels can be effectively balanced, and product defects caused by uneven flow can be reduced. This design makes the flow of the polymer material in the flow distribution plate more uniform, thereby improving the overall quality of the product. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 is a sectional view of one embodiment of the utility model;
[0023] Figure 2 is a bottom view of the upper plate body;
[0024] Figure 3 is a top view of the lower plate body;
[0025] Figure 4 is Figure 2 a sectional view of A-A in the figure;
[0026] Figure 5 is Figure 3 a sectional view of B-B in the figure;
[0027] Figure 6 is an application schematic view of one embodiment of the utility model.
[0028] Wherein: plate body 100, input end 101, output end 102, heating portion 103, upper plate body 11, first machining surface 111, lower plate body 12, second machining surface 121, flow channel 200, first flow channel section 201, third flow channel section 203, upper layer flow channel groove group 210, upper layer first groove 211, upper layer second groove 212, upper layer third groove 213, upper layer flow channel isolation portion 214, lower layer flow channel groove group 220, lower layer first groove 221, lower layer second groove 222, lower layer third groove 223 and lower layer flow channel isolation portion 224. DETAILED DESCRIPTION
[0029] The embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used only for explaining the present application, and cannot be understood as a limitation of the present application.
[0030] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.
[0031] In addition, the terms "first", "second" and "third" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and "third" can explicitly or implicitly include one or more of the features.
[0032] It should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be broadly understood, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0033] The technical scheme of the present application is described below in combination with the drawings Figures 1 to 6 The technical scheme of the present application is described below in combination with the drawings
[0034] A flow distribution plate of a hot runner system, comprising a plate body 100 and a flow channel 200 formed inside the plate body 100, the plate body 100 comprising an upper plate body 11 and a lower plate body 12;
[0035] The bottom surface of the upper plate body 11 has a first machined surface 111, the first machined surface 111 is provided with an upper layer flow channel groove group 210, the top surface of the lower plate body 12 has a second machined surface 121, the second machined surface 121 is provided with a lower layer flow channel groove group 220, the first machined surface 111 and the second machined surface 121 are welded and connected, the upper layer flow channel groove group 210 and the lower layer flow channel groove group 220 cooperate to form the flow channel 200, the flow channel 200 is provided with an obstacle structure in the vertical direction, the obstacle is used to change the flow direction of the material in the flow channel 200;
[0036] The upper plate body 11 is provided with an input end 101 penetrating the upper plate body 11, the input end 101 being arranged at the starting end of the flow channel 200 and communicating with the flow channel 200, and the lower plate body 12 is provided with an output end 102 penetrating the lower plate body 12, the output end 102 being arranged at the end of the flow channel 200 and communicating with the flow channel 200.
[0037] By dividing the plate body 100 of the distributor plate into the upper plate body 11 and the lower plate body 12, and arranging the upper layer flow channel groove set 210 and the lower layer flow channel groove set 220 on the respective machining surfaces (the first machining surface 111 and the second machining surface 121), and then welding the first machining surface 111 and the second machining surface 121, the machining precision of the flow channel 200 can be greatly improved. This process of opening grooves on split plate bodies and connecting two plate bodies by welding to combine the grooves into a flow channel is easier to achieve high-precision flow channel manufacturing compared to the flow channels obtained by traditional gun drilling, thereby meeting the um-level precision requirements in modern polymer material processing.
[0038] Further, as a non-Newtonian fluid, the flow behavior of the polymer material is affected by various factors, including internal stress, temperature, viscosity change, etc., which will cause the flow speed of the polymer material in the distributor plate to be uneven, resulting in the phenomenon of "fast always fast, slow always slow". By arranging the blocking structure in the vertical direction within the flow channel 200, the flow direction of the polymer material in the flow channel can be effectively changed, which helps to uniformly distribute the polymer material in the flow channel 200, solves the problem of local overheating or uneven flow speed, and improves the balance and stability of the hot runner system. This is crucial for polymer material processing that requires high consistency.
[0039] The input end 101 and the output end 102 are arranged on the upper plate body 11 and the lower plate body 12, respectively, and accurately communicate with the flow channel 200. This design makes the input and output of the material more controllable, and facilitates the adjustment of the material flow and flow rate according to specific processing requirements, further optimizing the processing process.
[0040] In summary, by opening grooves in different plate bodies and combining the grooves into a flow channel 200 including a blocking structure after connecting the plate bodies, the flow speed of the polymer material in the flow channel can be effectively balanced, and product defects caused by uneven flow can be reduced. This design makes the flow of polymer material in the distributor plate more uniform, improving the overall quality of the product.
[0041] Further, the upper layer flow channel groove group 210 comprises an upper layer first groove 211, an upper layer second groove 212 and an upper layer third groove 213 arranged in sequence from the starting end to the end of the flow channel 200, and an upper layer flow channel isolation part 214 is arranged between the upper layer first groove 211 and the upper layer second groove 212; the lower layer flow channel groove group 220 comprises a lower layer first groove 221, a lower layer second groove 222 and a lower layer third groove 223 arranged in sequence from the starting end to the end of the flow channel 200, and a lower layer flow channel isolation part 224 is arranged between the lower layer second groove 222 and the lower layer third groove 223; the upper layer flow channel isolation part 214 and the lower layer flow channel isolation part 224 are the obstacle structures;
[0042] When the upper layer flow channel groove group 210 and the lower layer flow channel groove group 220 are combined into the flow channel 200, the upper layer first groove 211 and the lower layer first groove 221 form a first flow channel section 201, the upper layer third groove 213 and the lower layer third groove 223 form a third flow channel section 203, the upper layer flow channel isolation part 214 is located above the lower layer second groove 222, and the lower layer flow channel isolation part 224 is located below the upper layer second groove 212;
[0043] The starting end of the first flow channel section 201 communicates with the input end 101, the end of the first flow channel section 201 communicates with the starting end of the lower layer second groove 222, the end of the lower layer second groove 222 communicates with the starting end of the upper layer second groove 212, the end of the upper layer second groove 212 communicates with the starting end of the third flow channel section 203, and the end of the third flow channel section 203 communicates with the output end 102.
[0044] By setting multiple grooves (such as the upper first groove 211, the upper second groove 212, the upper third groove 213, and the corresponding lower grooves) and flow channel isolation parts (such as the upper flow channel isolation part 214 and the lower flow channel isolation part 224) in the upper flow channel groove group 210 and the lower flow channel groove group 220, the flow channel path can be designed more flexibly. After the upper plate body 11 and the lower plate body 12 are connected, the flow channel 200 is divided into the first flow channel section 201, the lower second groove 222, the upper second groove 212, and the third flow channel section 203, which are sequentially connected from the input end 101 to the output end 102. When the high polymer material flows through the flow channel 200, it will inevitably be "obstructed" by the upper flow channel isolation part 214 and the lower flow channel isolation part 224 in the flow direction, causing it to flow downward into the lower second groove 222 when encountering the upper flow channel isolation part 214, and to flow upward into the upper second groove 212 when encountering the lower flow channel isolation part 224, and finally to the third flow channel section 203. Through the design of these obstruction structures (the upper flow channel isolation part 214 and the lower flow channel isolation part 224), the high polymer material can change the flow direction when flowing through, which helps to reduce the speed difference caused by the flow path difference and promotes the uniformity of the overall flow. By using the diffusion welding process of the upper plate body 11 and the lower plate body 12, a gap is left between the two groove bodies on the same processing surface, and the welding surface (the first processing surface 111, the second processing surface 121) forms a concave groove and a relatively raised isolation part (the upper flow channel isolation part 214 and the lower flow channel isolation part 224). This design not only adjusts the flow direction of the high polymer material in the flow distribution plate, but also affects the internal stress and flow speed of the high polymer material by changing the shape of the flow channel. The obstruction structure forms a buffer zone in the flow channel 200, which helps to achieve smoother flow; reduces the material flow unevenness and internal stress changes caused by temperature differences.
[0045] Furthermore, the bottom of the upper flow channel isolation part 214 is at the same level as the first processing surface 111;
[0046] The top of the lower flow channel isolation part 224 is at the same level as the second processing surface 121.
[0047] By ensuring that the bottom of the upper flow channel isolation part 214 is at the same level as the first processing surface 111, and the top of the lower flow channel isolation part 224 is at the same level as the second processing surface 121, the accuracy and consistency of the flow channel processing can be significantly improved. This design helps to ensure that the upper and lower flow channel grooves form a smooth and continuous flow channel when they are matched, thereby reducing the flow unevenness or blockage problems caused by processing errors.
[0048] The design of the upper and lower flow channel isolation parts being horizontal to the processing surface helps to optimize the flow characteristics of the material in the flow channel 200. When the material flows through these areas, the flow resistance and pressure loss can be reduced due to the continuity of the shape of the flow channel 200, thereby improving the flow efficiency and stability of the material. This design also helps to enhance the integrity and stability of the flow channel structure.
[0049] Further, the groove depth of the upper first groove 211 is 1 / 2D, the groove depth of the upper third groove 213 is 1 / 2D, and the groove depth of the upper second groove 212 is D, and the upper second groove 212 and the upper third groove 213 are connected by an arc surface.
[0050] The groove depth of the lower first groove 221 is 1 / 2D, the groove depth of the lower third groove 223 is 1 / 2D, and the groove depth of the lower second groove 222 is D, and the lower first groove 221 and the lower second groove 222 are connected by an arc surface.
[0051] By designing the depths of different grooves (such as the groove depth of the upper second groove 212 and the lower second groove 222 being D, and the groove depths of the upper first groove 211, the upper third groove 213, the lower first groove 221, and the lower third groove 223 being 1 / 2D), the overall pipe diameter of the flow channel 200 is D, ensuring the integrity of the flow channel 200.
[0052] By using an arc surface to connect the grooves, the stress concentration phenomenon caused by the change in groove depth can be reduced, thereby enhancing the stability and durability of the flow channel structure. The arc surface transition also reduces the friction and resistance of the material during flow, helping to improve the flow efficiency of the flow channel and the utilization rate of the material.
[0053] Further, the length of the upper first groove 211 is L1, the sum of the lengths of the lower first groove 221 and the lower second groove 222 is L2, and the width of the bottom of the upper flow channel isolation part 214 is the same as the width of the top of the lower flow channel isolation part 224, which is Lm,
[0054] wherein Lm = 1 / 2D; L2 = L1 + Lm + D.
[0055] By precisely setting the length L1 of the upper first slot 211, the sum L2 of the lengths of the lower first slot 221 and the lower second slot 222, and the width Lm of the upper and lower flow channel isolation part (and Lm = 1 / 2D, L2 = L1 + Lm + D), the technical solution provides higher accuracy and flexibility for the design of the flow distribution plate. This design allows designers to accurately adjust the length and layout of the flow channel according to specific processing needs and mold layout, thereby optimizing the material flow path and improving processing efficiency and product quality. By reasonably setting the length and layout of the different slots of the flow channel, it helps to optimize the flow path of the material in the flow channel. For example, by adjusting the ratio of L1 and L2, the flow distribution between different flow channel sections can be controlled, thereby achieving more uniform filling and less pressure loss. At the same time, the width Lm of the upper and lower flow channel isolation part is set to 1 / 2D, which helps to achieve smoother transition at the flow channel bend, reducing flow resistance and shear force, and protecting the internal structure of the material.
[0056] By precisely setting the length and layout of the flow channel slots and the width of the upper and lower flow channel isolation part, it helps to improve the reliability and consistency of the flow distribution plate. By optimizing the flow channel structure, improving processing accuracy and consistency, and enhancing structural stability, it can ensure that the flow distribution plate maintains stable performance and quality during long-term use. At the same time, since the material flows more uniformly and stably in the flow channel, it can also improve the consistency of processing efficiency and product quality.
[0057] Further, the length of the upper second slot 212 is L12, and the length of the lower second slot 222 is L22,
[0058] wherein L12 = 2D, L22 = 5 / 3D.
[0059] By setting the length L12 of the upper second slot 212 to 2D and the length L22 of the lower second slot 222 to 5 / 3D, the flow speed and filling time of the material in different flow channel sections can be more finely controlled. Such design helps to balance the material flow in the entire flow channel system, reducing flow unevenness and underfilling problems.
[0060] Although the specific values of L12 and L22 are different, they are both set based on multiples of the reference dimension D. This design helps to maintain the integrity and stability of the flow channel 200. By ensuring that the length of the flow channel slot is an integer or fractional multiple of the reference dimension, it can reduce processing errors and assembly problems caused by size mismatch, thereby improving the durability and service life of the flow distribution plate.
[0061] Further, the plate body 100 is internally provided with a plurality of flow channels 200, the starting ends of the plurality of flow channels 200 are located at the same position, the starting ends of the plurality of flow channels 200 are communicated with the same input end 101, and the ending ends of the plurality of flow channels 200 are located at positions not interfering with each other.
[0062] In this technical solution, the starting ends of the plurality of flow channels 200 are located at the same position and communicated with the same input end 101. This design ensures that all the materials entering from the input end 101 can be uniformly distributed to each flow channel. Due to the consistency of the starting end positions, the materials will not be biased or accumulated when being distributed, thereby ensuring that each flow channel 200 can obtain equal or nearly equal material flow.
[0063] The ending ends of the plurality of flow channels 200 are located at positions not interfering with each other and are used for connecting different hot nozzles, thereby ensuring that each flow channel 200 independently transports materials.
[0064] Further, the upper plate body 11 and the lower plate body 12 are both provided with heating portions 103, and the heating portion 103 of the upper plate body 11 is correspondingly arranged with the heating portion 103 of the lower plate body 12.
[0065] By arranging the corresponding heating portions 103 on the upper plate body 11 and the lower plate body 12, the temperature control of the hot runner system can be more conveniently realized. The uniform distribution of the heating portions 103 helps to realize the temperature balance of the entire flow channel system and avoid the situation of local overheating or overcooling. This is crucial for ensuring the melting state and fluidity of the high polymer material and helps to improve the quality and stability of the high polymer material.
[0066] The arrangement of the heating portions 103 also helps to enhance the durability and stability of the flow distribution plate. Since heat can be uniformly transmitted to each part of the flow distribution plate, the thermal stress caused by uneven temperature can be reduced, and the risk of deformation or damage of the flow distribution plate caused by thermal stress can be reduced. At the same time, the uniform temperature distribution also helps to prolong the service life of the heating element and improve the overall stability of the flow distribution plate.
[0067] The technical principle of the utility model is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the utility model and cannot be interpreted as limiting the protection scope of the utility model in any way. Based on the explanation herein, other specific embodiments of the utility model can be conceived by those skilled in the art without creative labor, and these embodiments will all fall within the protection scope of the utility model.
Claims
1. A manifold for a hot runner system comprising a manifold body and a flow channel formed within the manifold body, wherein: The plate body comprises an upper plate body and a lower plate body; The bottom surface of the upper plate body is provided with a first processing surface, and the first processing surface is provided with an upper layer flow channel groove group; the top surface of the lower plate body is provided with a second processing surface, and the second processing surface is provided with a lower layer flow channel groove group; the first processing surface is welded with the second processing surface; the upper layer flow channel groove group and the lower layer flow channel groove group are matched to form the flow channel; the flow channel is provided with an obstacle structure in the vertical direction, and the obstacle structure is used for changing the flow direction of the material in the flow channel; The upper plate body is provided with an input end, the input end penetrates through the upper plate body, the input end is arranged at the starting end of the flow channel and communicates with the flow channel; the lower plate body is provided with an output end, the output end penetrates through the lower plate body, the output end is arranged at the end of the flow channel and communicates with the flow channel.
2. The manifold distribution plate of claim 1 wherein: The upper layer flow channel groove group comprises an upper layer first groove, an upper layer second groove and an upper layer third groove arranged in sequence from the starting end to the end of the flow channel, and an upper layer flow channel isolation part is arranged between the upper layer first groove and the upper layer second groove; the lower layer flow channel groove group comprises a lower layer first groove, a lower layer second groove and a lower layer third groove arranged in sequence from the starting end to the end of the flow channel, and a lower layer flow channel isolation part is arranged between the lower layer second groove and the lower layer third groove; the upper layer flow channel isolation part and the lower layer flow channel isolation part are the obstacle structure; When the upper layer flow channel groove group and the lower layer flow channel groove group are combined to form the flow channel, the upper layer first groove and the lower layer first groove form a first flow channel section, the upper layer third groove and the lower layer third groove form a third flow channel section, the upper layer flow channel isolation part is located above the lower layer second groove, and the lower layer flow channel isolation part is located below the upper layer second groove; The starting end of the first flow channel section communicates with the input end, the end of the first flow channel section communicates with the starting end of the lower layer second groove, the end of the lower layer second groove communicates with the starting end of the upper layer second groove, the end of the upper layer second groove communicates with the starting end of the third flow channel section, and the end of the third flow channel section communicates with the output end.
3. A hot runner manifold distribution plate according to claim 2, wherein: The bottom of the upper layer flow channel isolation part is in the same horizontal plane as the first processing surface; The top of the lower layer flow channel isolation part is in the same horizontal plane as the second processing surface.
4. The manifold of claim 3 wherein: The groove depth of the upper layer first groove is 1 / 2D, the groove depth of the upper layer third groove is 1 / 2D, and the groove depth of the upper layer second groove is D; the upper layer second groove and the upper layer third groove are transitioned through an arc surface; The groove depth of the lower layer first groove is 1 / 2D, the groove depth of the lower layer third groove is 1 / 2D, and the groove depth of the lower layer second groove is D; the lower layer first groove and the lower layer second groove are transitioned through an arc surface.
5. A manifold distribution plate for a hot- runner system according to claim 4, wherein: The length of the upper layer first groove is L1, the sum of the lengths of the lower layer first groove and the lower layer second groove is L2, and the width of the bottom of the upper layer flow channel isolation part is the same as the width of the top of the lower layer flow channel isolation part, which is Lm, wherein Lm=1 / 2D; L2=L1+Lm+D.
6. A manifold distribution plate for a hot- runner system according to claim 5, wherein: The length of the upper second groove is L12, and the length of the lower second groove is L22, wherein L12=2D, and L22=5 / 3D.
7. The manifold of claim 1 wherein: The plate body is internally provided with a plurality of flow channels, the starting ends of the flow channels are located at the same position, the starting ends of the flow channels are communicated with the same input end, and the terminal ends of the flow channels do not interfere with each other.
8. The manifold distribution plate of claim 1 wherein: The upper plate body and the lower plate body are both provided with heating portions, and the heating portion of the upper plate body is correspondingly arranged with the heating portion of the lower plate body.