Hot runner structure
By designing a multi-cavity hot runner structure and using temperature control sensors and needle valves to ensure consistent pouring head temperature, the problem of inconsistent temperatures in multi-mold configurations was solved, achieving efficient and low-cost plastic bottle cap manufacturing.
Patent Information
- Application Number
- CN202422868963.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-25
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-11-25
AI Technical Summary
When manufacturing multiple plastic bottle caps, existing injection molding machines require multiple molds for the same machine, resulting in high costs and low efficiency. Furthermore, the inconsistent injection temperatures of multi-cavity molds lead to inconsistent quality.
A hot runner structure was designed, including a main runner plate, branch runner plates, a gating pipe, a temperature control sensor, and a needle valve. The gating pipe enables a multi-cavity mold, and the temperature control sensor ensures the temperature consistency of each gating head. A symmetrical hexagonal petal structure and an electric heating wire heating device are adopted.
This technology enables the efficient manufacturing of multiple plastic bottle caps, reduces manufacturing costs, ensures consistent injection molding temperatures, and improves product quality.
Smart Images
Figure CN223763673U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of hot runner structure technology, and specifically relates to a hot runner structure. Background Technology
[0002] Hot runner molds are a commonly used type of injection molding mold. They are increasingly popular in the market due to their advantages such as saving raw materials, corrosion resistance, and suitability for mass production.
[0003] The plastic bottle cap is made of HDPE. The inner cavity of the bottle cap has internal threads and a sealing ring. The injection molding principle of plastic bottle cap is to heat the plastic granules to a molten state, and then inject the molten plastic into the mold cavity through an injection molding machine. After cooling and solidification, the desired shape of the bottle cap is obtained. Different injection molding temperatures also affect the quality of plastic bottle caps.
[0004] However, in current technology, most injection molding machines can only produce one plastic bottle cap per injection into a mold. If an injection molding machine needs to produce multiple plastic bottle caps in one injection, multiple molds are required for the same injection molding machine, which increases the manufacturing cost of plastic bottle caps. Furthermore, the need for mold opening and closing for each mold also reduces the manufacturing efficiency of plastic bottle caps. The few injection molds with multiple cavities suffer from inconsistent temperatures at the runner and gate during the injection process, leading to inconsistent quality of the molded plastic bottle caps.
[0005] In view of the above problems, developing a hot runner structure with multiple cavities in one mold that can simultaneously cast multiple plastic bottle caps while ensuring consistent injection temperature at each casting head has become an urgent problem to be solved. Summary of the Invention
[0006] In view of this, the present invention proposes a hot runner structure, which aims to solve the problem of how to achieve multiple cavities in one mold and consistent injection temperature.
[0007] In one aspect, this utility model provides a hot runner structure, comprising:
[0008] Main flow slab, wherein a main pouring channel is provided within the main flow slab;
[0009] Several sub-runner plates are provided, and each sub-runner plate is provided with six pouring heads. The six pouring heads are respectively located on both sides of the main runner plate. Each sub-runner plate is provided with a sub-pouring channel. Each pouring head is connected to the sub-pouring channel with an insert.
[0010] The main flow channel and the several branch flow channels are connected by several casting pipes;
[0011] A first needle valve is provided in the pouring channel inside the pouring pipe;
[0012] A second needle valve is provided in the sub-casting channel;
[0013] Both the pouring pipe and the pouring head are equipped with temperature control sensors.
[0014] Furthermore, the main gating channel is connected to the sub-gating channels through the gating channel inside the gating pipe, realizing a multi-cavity hot runner structure in a single mold.
[0015] Furthermore, the temperature control sensors on the gating pipe and the gating head are electrically connected to the temperature control system, so that the consistency of the injection temperature of any of the gating heads can be achieved by regulating the internal temperature of the gating pipe and the gating head.
[0016] Furthermore, the insert is provided with an internal thread, and the injection head is provided with an external thread, with the internal thread engaging with the external thread.
[0017] Furthermore, heating devices are respectively provided on the two flow channel plates, and the heating devices are all electric heating wires.
[0018] Furthermore, all the flow channels are symmetrical structures. This application adopts a symmetrical hexagonal petal structure, and the six pouring heads are respectively located on the six legs.
[0019] Furthermore, a pouring gate is provided at the center of the main slab.
[0020] Furthermore, an air valve is provided at the corresponding position of the main flow slab and the pouring pipe.
[0021] Furthermore, the piston of the air valve drives the first needle valve to move, thereby opening and closing the main pouring channel and each sub-pouring channel.
[0022] Furthermore, the piston end of the air valve is connected to the first needle valve, and the piston end of the air valve is downward and arranged along the inside of the casting pipe.
[0023] Furthermore, each of the aforementioned casting pipes is provided with a flange at its lower end, and the flange is connected to the runner plate by bolts.
[0024] Furthermore, the sub-gating channel includes multiple vertically arranged gating channels, and below the multiple vertically arranged gating channels is a hexagonal petal-shaped gating channel arranged horizontally. The three outlets on the same side of the hexagonal petal-shaped gating channel are respectively connected to the second needle valve through a sealing gasket.
[0025] Furthermore, the three outlets of the hexagonal petal-shaped casting channel are blocked by the second needle valve.
[0026] Compared with existing hot runner structures, this invention has the following advantages:
[0027] This invention provides a hot runner structure with a reasonable design. The main gating channel is connected to all the sub-gating channels through the gating channel inside the gating pipe, realizing a multi-cavity hot runner structure in one mold. Multiple plastic bottle caps are poured through the gating heads of all the sub-gating plates, eliminating the need for multiple molds for the same injection molding machine, reducing the manufacturing cost of plastic bottle caps, and improving the manufacturing efficiency. Furthermore, temperature control sensors are installed in both the gating pipe and the gating head to ensure the consistency of temperature of each gating head during injection molding, thereby improving the quality of the plastic bottle caps. Attached Figure Description
[0028] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:
[0029] Figure 1 A schematic diagram of a hot runner structure provided for an embodiment of this utility model;
[0030] Figure 2 A front view of a hot runner structure provided in an embodiment of this utility model;
[0031] Figure 3 A top view of a hot runner structure provided in an embodiment of this utility model;
[0032] In the diagram: 1-Main flow channel; 2-Diverter flow channel; 3-Gating port; 4-Air valve; 5-Gating pipe; 6-Temperature sensor; 7-Flange; 8-Installation piece; 9-Gating head. Detailed Implementation
[0033] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.
[0034] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0035] 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.
[0036] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0037] See Figure 1 and Figure 3 As shown, this utility model provides a hot runner structure, including a main runner plate 1 and a branch runner plate 2.
[0038] Specifically, the main runner plate 1 is provided with a main pouring channel; there are several branch runner plates 2, and each branch runner plate 2 is provided with six pouring heads 9. The six pouring heads 9 are located on both sides of the main runner plate 1, and each branch runner plate 2 is provided with a branch pouring channel. Each pouring head 9 is connected to the branch pouring channel through an insert 8.
[0039] Specifically, the insert 8 has an internal thread, and the pouring head 9 has an external thread. The internal thread engages with the external thread to connect the pouring head 9 with the sub-pouring channel.
[0040] Specifically, the main channel slab 1 and several branch channel slabs 2 are connected by several pouring pipes 3.
[0041] Specifically, a first needle valve is installed in the pouring channel inside the pouring pipe 3; a second needle valve is installed in the sub-pouring channel.
[0042] Specifically, temperature control sensors 6 are installed on both the pouring pipe 3 and the pouring head 9.
[0043] Specifically, the temperature sensor 6 is electrically connected to the temperature control system, and by regulating the internal temperature of the gating pipe 3 and the gating head 9, the consistency of the injection temperature of any gating head 9 can be achieved.
[0044] Understandably, the main runner 1 contains a main pouring channel, and each branch runner 2 contains a branch pouring channel. The main pouring channel connects to all branch pouring channels via the pouring channel within the pouring pipe 3. A first needle valve is installed within the pouring channel of the pouring pipe 3, and a second needle valve is installed within each branch pouring channel. The opening and closing of the pouring channels can be controlled via these first and second needle valves. Temperature sensors 6 are installed on both the pouring pipe 3 and the pouring head 9, allowing the temperature within these components to be adjusted via a temperature control system.
[0045] As can be seen from the above embodiments, the main gating channel is connected to all the sub-gating channels through the gating channel in the gating pipe, realizing a hot runner structure with multiple cavities in one mold. Temperature control sensors are set in both the gating pipe and the gating head to control the gating temperature, ensuring the consistency of temperature of each gating head during injection molding and improving the quality of plastic bottle caps.
[0046] See Figure 1-2 As shown, in some embodiments of this application, heating devices are respectively provided on the two flow channel plates.
[0047] Specifically, all heating devices use electric heating wires.
[0048] See Figure 1 and Figure 3 As shown, in some embodiments of this application, both layers of diversion channels are symmetrical structures.
[0049] Specifically, this application adopts a symmetrical hexagonal petal structure, with six pouring heads 9 located on six supports.
[0050] See Figure 1-3 As shown, in some embodiments of this application, a pouring port 3 is provided at the center of the main slab 1.
[0051] See Figure 1-3 As shown, in some embodiments of this application, an air valve 4 is provided at the corresponding position of the main slab 1 and the pouring pipe 3.
[0052] Specifically, the piston end of the air valve 4 is connected to the first needle valve, and the piston end of the air valve 4 is downward and arranged along the inside of the casting pipe 3.
[0053] Understandably, the piston of air valve 4 drives the first needle valve to move, thereby opening and closing the main pouring channel and each sub-pouring channel.
[0054] Specifically, each of the casting pipes 3 has a flange at its lower end, and the flange is connected to the flow channel plate 2 by bolts.
[0055] See Figure 1As shown, in some embodiments of this application, the sub-gating channel includes a plurality of vertically arranged gating channels, and below the plurality of vertically arranged gating channels is a hexagonal petal-shaped gating channel arranged in a horizontal direction.
[0056] Specifically, the three outlets on the same side of the hexagonal petal-shaped gating channel are connected to the second needle valve through sealing gaskets.
[0057] Understandably, the second needle valve blocks the three outlets of the hexagonal petal-shaped gating channel.
[0058] It will be understood by those skilled in the art that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 hot runner structure, characterized by, The utility model relates to a multi-cavity injection mould structure, which comprises: a main runner plate, a main runner being arranged in the main runner plate; a plurality of runner plates, each of the runner plates being provided with six injection heads, the six injection heads being arranged on both sides of the main runner plate, each of the runner plates being provided with a sub-runner, and each of the injection heads being detachably connected with the sub-runner through an insert piece; the main runner plate and the plurality of runner plates being connected through a plurality of injection pipes; a first needle valve being arranged in the injection runner of the injection pipe; a second needle valve being arranged in the sub-runner; a temperature control sensor being arranged on the injection pipe and the injection head.
2. The hot runner structure of claim 1, wherein: The main runner is communicated with the sub-runner through the injection runner in the injection pipe.
3. The hot runner structure of claim 1, wherein: An inner thread is arranged in the insert piece, and an outer thread is arranged on the injection head, the inner thread being matched with the outer thread.
4. The hot runner structure of claim 1, wherein: Heating devices are arranged on the two layers of runner plates, and the heating devices are all electric heating wires.
5. The hot runner structure of claim 1, wherein: The runner plates are all symmetrical structures, and the application adopts symmetrical hexagonal petal structures, and the six injection heads are arranged on six supporting legs.
6. The hot runner structure of claim 2, wherein: A pouring gate is arranged at the center of the main runner plate.
7. The hot runner structure of claim 1 wherein: An air valve is arranged at the corresponding position of the main runner plate and the injection pipe.
8. The hot runner structure of claim 7, wherein: The piston end of the air valve is connected with the first needle valve, and the piston end of the air valve is arranged downward along the inner pipe of the injection pipe.
9. The hot runner structure of claim 7, wherein: A flange is arranged at the lower end of each of the injection pipes, and the flange is connected with the runner plate through bolts.
10. The hot runner structure of claim 9, wherein: The sub-runner comprises a vertical runner arranged along the vertical direction, six hexagonal petal type runners arranged along the horizontal direction below the vertical runner, and three outlets on the same side of the hexagonal petal type runners being connected with the second needle valve through sealing pads.