Hot runner splitter plate

Abstract

The utility model relates to a hot runner splitter plate which comprises a main plate and two auxiliary plates symmetrically arranged on the two sides of the main plate, a main runner penetrating in the length direction is arranged in the main plate, plugs are arranged at the two ends of the main runner, and each auxiliary plate comprises a first end and a second end. The first end part of the auxiliary plate is detachably connected with the main plate, a sub-runner is arranged in the auxiliary plate, and the sub-runner extends into the main plate through the first end part and is connected with the main runner. The splitter plate is formed by splicing the main plate and the auxiliary plate, the use number of plugs on the splitter plate can be effectively reduced, the risk of corner breakage and glue leakage is reduced, and the injection molding quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hot runner injection molding, in particular to a hot runner manifold. Background Art

[0002] The manifold, also known as the hot runner manifold, is the central component of the hot runner system. It distributes the plastic melt transmitted from the nozzle through the internal runner to the hot nozzles of each injection point, and the hot nozzles then introduce the plastic into the mold cavity.

[0003] When the existing manifold is injected into the mold cavity, in order to speed up the injection efficiency and uniformity, it is usually provided with multiple injection points, each injection point is connected to a hot nozzle. Therefore, the manifold usually includes multiple branches, each branch is provided with a flow channel and a corresponding hot nozzle to ensure that the plastic can smoothly reach the hot nozzle of each injection point; when the current manifold is processed, large-sized raw materials are usually selected, and then the unnecessary parts are removed, and the remaining parts are formed into the manifold of the required shape. This processing method results in low utilization of raw materials, large waste, and increased cost of purchasing raw materials; on the other hand, the shape of the manifold is not good. After the initial processing of the shape is completed, a drill is usually used to process the flow channel inside the manifold, that is, a drill is used to drill from each end to form an internal flow channel. This method will leave a processing hole on the end face of each branch, so a plug is needed to seal these processing holes to ensure that the material does not flow out of the processing hole. However, after the plug is formed at the processing hole, there may be a favorable angle at the end of the plug located in the flow channel, which increases the shear force when the molten plastic passes through, causing the material to decompose and easily cause defects such as color mixing and air marks in the injection molded product. At the same time, there is a certain risk of glue leakage when using a plug to seal, which affects the effect and quality of the injection molding. Utility Model Content

[0004] The purpose of the utility model is to provide a hot runner manifold which can improve the injection molding quality and has low manufacturing cost.

[0005] A hot runner manifold plate comprises a main board and two sub-boards symmetrically arranged on both sides of the main board, wherein a main flow channel running through the main board along the length direction is provided inside the main board, and plugs are provided at both ends of the main flow channel, the sub-board comprises a first end and a second end, the first end of the sub-board is detachably connected to the main board, and a diversion channel is provided inside the sub-board, and the diversion channel extends into the interior of the main board through the first end and is connected to the main flow channel.

[0006] In the above technical solution, during injection molding, the main plate and sub-plate of the diverter plate are connected to a hot nozzle, the main channel and the diverter channel are used for passing the molten material so that the material enters the hot nozzle, the main channel passes through both ends of the main plate, and the plug is used to seal both ends of the main channel to prevent the material from flowing out from the end, the first end of the sub-plate is connected to the main plate, the diverter channel passes through the end face of the first end, and extends to the inside of the main plate to communicate with the main channel, wherein, since the sub-plate and the main plate are detachably connected, the main plate and the sub-plate can be processed separately during production, shortening the processing cycle, and since the diverter plate is split into multiple parts, the appropriate size can be selected when purchasing the raw materials for the diverter plate, and there is no need to purchase large-sized raw materials and then cut them, which can effectively reduce costs, while also improving the utilization rate of raw materials and reducing waste.

[0007] It should be noted that the processing of the main channel and the branch channel requires the use of a gun drill, which drills from the end faces of the main plate and the sub-plate to form a flow channel inside. A processing hole will be left on the end face drilled by the gun drill, so a plug is needed to seal the processing holes at both ends of the main plate to ensure that the material does not flow out of the processing hole and thus smoothly enters the hot nozzle. Among them, due to the limited length of the gun drill, when processing the main channel of the main plate, the gun drill drills from both ends of the main plate respectively and meets in the middle to form the main channel. The sub-plate is usually shorter in length, so when processing the branch channel, it only needs to be drilled from the first end of the sub-plate, and there is no need to penetrate it. Therefore, only a processing hole is left on the first end. Therefore, the sub-plate does not need to be sealed with a plug. It is only necessary to set plugs at both ends of the main plate, thereby minimizing the number of plugs used, reducing the sharp corners in the flow channel caused by the plugs, and reducing the risk of glue leakage.

[0008] Optionally, in one embodiment, first guide portions are provided at both ends of the main flow channel, and a second guide portion is provided at one end of the branch flow channel close to the second end portion.

[0009] In the above technical solution, during injection molding, the diverter plate is set horizontally, the hot nozzle is connected to the bottom of the diverter plate, and a feed hole is provided at the top of the hot nozzle. Each first guide part and the second guide part are connected to the feed hole of a hot nozzle, so that the material is smoothly introduced into the hot nozzle to complete the subsequent injection molding work.

[0010] Optionally, in one embodiment, a protruding portion is provided on the circumferential side of the first end portion, and a mounting hole is provided on the protruding portion.

[0011] In the above technical solution, holes corresponding to the mounting holes are provided on the side of the main board, and the mounting holes are used to install parts such as screws, so that the sub-board and the main board can be detachably connected.

[0012] Optionally, in one embodiment, a protruding connection block is provided on the end surface of the second end portion, and a connection groove that matches the connection block is provided on the side surface of the main board.

[0013] In the above technical solution, when the sub-board is installed, the connecting block can be inserted into the connecting groove, which is convenient for installation, and the connecting block and the connecting groove can also facilitate positioning during installation.

[0014] Optionally, in one embodiment, a heat insulation board is detachably connected to the second end portion.

[0015] In the above technical solution, during injection molding, the diverter plate is installed in the mold, and a groove for installing the diverter plate is opened inside the mold. After the molten material is passed into the diverter plate, a certain thermal expansion will occur. After the expansion, the insulation plate at the second end of the sub-plate will press against the inner wall of the mold, thereby fixing the entire diverter plate. At this time, the insulation plate can separate the diverter plate from the mold, thereby preventing the heat of the diverter plate from being transferred to the mold, thereby ensuring the temperature of the internal material.

[0016] Optionally, in one embodiment, heating tubes are provided inside the main plate and the sub-plate, and the heating tubes are arranged around the main flow channel and the branch flow channel.

[0017] In the above technical solution, the heating tube is used to heat and keep the material inside the flow channel warm to ensure that it is always in a molten state.

[0018] Optionally, in one embodiment, a feed port is provided on the main board, and the feed port is provided at the connection between the main channel and the branch channel, and is communicated with the main channel and the branch channel.

[0019] In the above technical solution, the feed port is used to introduce materials, and the feed port is arranged at the connection between the main channel and the branch channel, so that the materials can enter the main channel and the branch channel evenly.

[0020] Optionally, in one embodiment, a plurality of connection holes are provided on both the main board and the sub-board.

[0021] In the above technical solution, the connecting holes are used to fix the manifold to the mold via fasteners during injection molding.

[0022] Compared with the prior art, this application has the following beneficial effects:

[0023] The present application sets the main board and the sub-board to be detachably connected, so that the main board and the sub-board can be processed separately during production, thereby shortening the processing cycle. Moreover, since the manifold is divided into multiple parts, it is only necessary to select the appropriate size when purchasing the raw materials for the manifold, thereby effectively reducing costs and improving the utilization rate of raw materials. At the same time, the spliced ​​structure means that the ends of the sub-board do not need to be sealed with plugs. Only plugs need to be set at both ends of the main board, thereby minimizing the number of plugs used on the manifold, reducing the sharp corners in the flow channel caused by the plugs, improving the quality of injection molding, and reducing the risk of glue leakage caused by the use of plugs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 Schematic diagram of the structure of a hot runner manifold according to an embodiment.

[0026] Figure 2 This is a structural diagram of the mainboard.

[0027] Figure 3 Schematic diagram of the structure of the sub-board

[0028] Figure 4 This is a structural diagram of the manifold of the present application after being installed on the flow channel plate.

[0029] Figure 5 for Figure 4 Schematic diagram of the cross section at the AA position in the middle.

[0030] Figure 6 for Figure 4 Schematic cross-section at the middle BB position.

[0031] Description of reference numerals in the figures:

[0032] 1- Main board; 11- Main channel; 111- First guide part; 12- Plug; 13- Connecting groove; 14- Feed inlet; 2- Sub-board; 21- First end; 22- Second end; 23- Branch channel; 231- Second guide part; 24- Projection; 241- Mounting hole; 25- Connecting block; 26- Heat insulation board; 3- Heating tube; 4- Connecting hole; 5- Hot nozzle; 6- Flow channel plate; 61- Mounting groove; 7- Screw. DETAILED DESCRIPTION

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0035] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0036] Please refer to Figures 1 to 3 In a preferred embodiment of the present application, a hot runner manifold plate includes a main board 1 and two sub-boards 2 symmetrically arranged on both sides of the main board 1. The main board 1 and the sub-boards 2 are perpendicular to each other. A main flow channel 11 is provided inside the main board 1 and runs through in the length direction. Plugs 12 are provided at both ends of the main flow channel 11. The sub-board 2 includes a first end 21 and a second end 22. The first end 21 of the sub-board 2 is detachably connected to the main board 1. A diverter 23 is provided inside the sub-board 2. The diverter 23 passes through the first end 21 of the sub-board 2, then passes through the side of the main board 1 and extends to the inside of the main board 1, thereby being vertically connected to the main flow channel 11 inside the main board 1.

[0037] In this embodiment, during injection molding, the main board 1 and the sub-board 2 of the diverter plate are both connected to a hot nozzle 5, and the main channel 11 and the diverter channel 23 are used for allowing the molten material to pass through so that the material enters the hot nozzle 5. The main channel 11 passes through both ends of the main board 1, and the plug 12 is used to seal both ends of the main channel 11 to prevent the material from flowing out from the end. The first end 21 of the sub-board 2 is connected to the main board 1, and the diverter channel 23 passes through the end face of the first end 21 and extends to the inside of the main board 1 to communicate with the main channel 11. Among them, since the sub-board 2 and the main board 1 are detachably connected, the main board 1 and the sub-board 2 can be processed separately during production, shortening the processing cycle. Moreover, since the diverter plate is split into multiple parts, the appropriate size can be selected when purchasing the raw materials for the diverter plate. There is no need to purchase large-sized raw materials and then cut them, which can effectively reduce costs. At the same time, it can also improve the utilization rate of raw materials and reduce waste.

[0038] It should be noted that the main channel 11 and the branch channel 23 are processed by gun drilling. When the main channel 11 of the main board 1 is processed, the gun drill drills from both ends of the main board 1 and meets in the middle to form the main channel 11. When the branch channel 23 of the sub-plate 2 is processed, the gun drill drills from the first end 21 of the sub-plate 2 and does not penetrate from the second end 22, thereby forming a branch channel 23 inside the sub-plate 2. It is worth mentioning that the interior of the main board 1 also includes a part of the branch channel 23. This part of the branch channel 23 can be formed by drilling from the side of the main board 1 by a gun drill. The processed holes left at both ends of the main board 1 are sealed by plugs 12. Since the sub-plate 2 is not penetrated and its first end 21 is connected to the main board 1, the plug 12 is not needed, so as to reduce the number of plugs 12 used on the branch plate, reduce the sharp corners in the flow channel caused by the plug 12, improve the quality of injection molding, and reduce the risk of glue leakage caused by the use of the plug 12.

[0039] Please refer to Figures 1 to 6 In this embodiment, the two ends of the main channel 11 are provided with a first guide portion 111, and the end of the branch channel 23 close to the second end portion 22 is provided with a second guide portion 231. Figure 5 and Figure 6 As shown, the first guide portion 111 and the second guide portion 231 are both vertically arranged. During injection molding, the diverter plate is horizontally arranged, the hot nozzle 5 is connected to the bottom of the diverter plate, and a feed hole is provided at the top of the hot nozzle 5. Each of the first guide portion 111 and the second guide portion 231 is connected to a feed hole of the hot nozzle 5, so that the material is smoothly introduced into the hot nozzle 5 to complete the subsequent injection molding work.

[0040] Please refer to Figures 1 to 6 In this embodiment, a protruding protrusion 24 is provided on the peripheral side of the first end portion 21, and a mounting hole 241 is provided on the protruding protrusion 24. A hole corresponding to the mounting hole 241 is provided on the side of the main board 1. The mounting hole 241 is used to install a screw, so that the sub-board 2 and the main board 1 can be detachably connected.

[0041] Please refer to Figures 1 to 3 In this embodiment, a protruding connecting block 25 is provided on the end surface of the second end portion 22, and a connecting groove 13 is provided on the side of the main board 1 to match the connecting block 25. When the sub-board 2 is installed, the connecting block 25 can be inserted into the connecting groove 13, which is convenient for installation, and the connecting block 25 and the connecting groove 13 can also facilitate positioning during installation.

[0042] Please refer to Figures 1 to 6 In this embodiment, a heat insulation plate 26 is detachably connected to the second end portion 22. Figure 6As shown, during injection molding, the diverter plate is installed in the runner plate 6 of the mold. A mounting groove 61 for installing the diverter plate is opened inside the runner plate 6. The size of the mounting groove 61 is slightly larger than the size of the diverter plate to prevent heat from being conducted to the runner plate 6. After the molten material is passed into the diverter plate, a certain amount of thermal expansion will occur. After the expansion, the heat insulation plate 26 of the second end portion 22 of the sub-plate 2 will support the groove wall of the mounting groove 61, thereby fixing the entire diverter plate. At this time, the heat insulation plate 26 can separate the diverter plate from the runner plate 6, thereby preventing the heat of the diverter plate from being conducted to the runner plate 6 to ensure the temperature of the internal material.

[0043] Specifically, the heat insulation board 26 is made of high temperature resistant bakelite, which has good heat insulation performance. The heat insulation board 26 is connected to the second end 22 of the auxiliary board 2 by screws 7 (such as Figure 6 ), for easy installation and removal.

[0044] Please refer to Figures 1 to 4 In this embodiment, heating tubes 3 are provided inside the main plate 1 and the sub-plate 2, and the heating tubes 3 are arranged around the main channel 11 and the branch channel 23. The heating tubes 3 are used to heat and keep the material inside the channel warm to ensure that it is always in a molten state.

[0045] Specifically, two groups of heating tubes 3 are provided inside the main board 1, and one group of heating tubes 3 is provided inside each sub-board 2, and the power connection ends of the heating tubes 3 are led out of the diverter plate.

[0046] Please refer to Figures 1 to 6 In this embodiment, a feed port 14 is provided on the main board 1. The feed port 14 is provided at the connection between the main channel 11 and the branch channel 23 and is communicated with the main channel 11 and the branch channel 23. The feed port 14 is used to introduce materials and is provided at the intersection of the main channel 11 and the branch channel 23 so that the materials can be evenly dispersed into the main channel 11 and the branch channel 23.

[0047] Please refer to Figures 1 to 3 In this embodiment, a plurality of connection holes 4 are provided on the main board 1 and the sub-board 2. Fastening parts such as screws are used to fix the manifold plate to the mold through the connection holes 4.

[0048] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

[0049] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0051] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

Claims

1. A hot runner manifold, characterized in that: It includes a main board and two sub-boards symmetrically arranged on both sides of the main board. A main channel is provided inside the main board and runs through along the length direction. Both ends of the main channel are provided with plugs. The sub-board includes a first end and a second end. The first end of the sub-board is detachably connected to the main board. A diversion channel is provided inside the sub-board. The diversion channel extends to the inside of the main board through the first end and is connected to the main channel.

2. The hot runner manifold according to claim 1, characterized in that: The two ends of the main channel are provided with first guide parts, and the end of the branch channel close to the second end is provided with a second guide part.

3. The hot runner manifold according to claim 1, characterized in that: A protruding portion is provided on the peripheral side of the first end portion, and a mounting hole is provided on the protruding portion.

4. The hot runner manifold according to claim 1, characterized in that: A protruding connection block is provided on the end surface of the second end portion, and a connection groove matched with the connection block is provided on the side surface of the main board.

5. The hot runner manifold according to claim 1, characterized in that: The second end portion is detachably connected to a heat insulation board.

6. The hot runner manifold according to claim 1, characterized in that: Heating pipes are provided inside the main board and the auxiliary board, and the heating pipes are arranged around the main flow channel and the branch flow channel.

7. The hot runner manifold according to claim 1, characterized in that: A feed port is provided on the main board, and the feed port is arranged at the connection of the main flow channel and the branch flow channel, and is communicated with the main flow channel and the branch flow channel.

8. The hot runner manifold according to claim 1, characterized in that: The main board and the sub-board are both provided with a plurality of connection holes.

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