Hot runner injection mold with oblique glue feeding function

Abstract

The hot runner injection mold comprises an upper mold, a lower mold, a runner plate and a hot runner device, the runner plate is arranged between the upper mold and the lower mold, the hot runner device comprises a splitter plate, a hot nozzle and a connecting block, and the runner plate is provided with a hot runner mounting groove penetrating in the axial direction of the runner plate. The hot runner mounting groove is used for containing the splitter plate, the connecting block comprises a first contact surface and a second contact surface, the first contact surface is parallel to the horizontal plane, and the second contact surface is located at the lower end of the first contact surface and is obliquely arranged relative to the first contact surface; the splitter plate is in plane fit with the first contact face, the hot nozzle is in inclined face fit with the second contact face, a mold core mounting groove is formed in the side, away from the runner plate, of the lower mold, a mold core is fixed in the mold core mounting groove, and the runner plate is arranged in the mold core mounting groove. An inclined through hole communicated with the mold core mounting groove is formed in one side, facing the runner plate, of the lower mold; and the hot nozzle extends into the mold core mounting groove from the inclined through hole.

Description

Technical Field

[0001] The utility model relates to the technical field of hot runner molds, in particular to a hot runner injection mold with oblique glue feeding. Background Art

[0002] In the field of plastic injection molding, open tip hot runner systems are widely used due to their simple structure and relatively low cost. However, as the market's requirements for the appearance quality of plastic products continue to increase, the challenges faced by traditional open tip hot runner systems in non-appearance slope injection are becoming increasingly prominent.

[0003] Traditional open-nozzle hot runner systems mostly use vertical glue injection, which directly limits its application on products that need to protect the appearance. For many plastic products, their surface is the appearance surface, and direct glue injection is not allowed to avoid leaving marks or flaws. Therefore, when it is necessary to inject glue on the non-appearance inclined surface of the product, it is often necessary to change the product structure, such as adding vertical columns on the inclined surface as glue injection points, and then injecting the molten glue through the hot nozzle. Although this method solves the glue injection problem, it increases the cost of subsequent manual trimming of product columns, and it is difficult to achieve automated injection molding, thereby reducing production efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a hot runner injection mold with oblique glue feeding, which can meet the glue feeding requirements of non-appearance inclined surfaces in the mold, reduce the cost and time consumption caused by adding additional structures (such as columns), and improve production efficiency.

[0005] A hot runner injection mold for oblique glue feeding, comprising an upper mold, a lower mold, a runner plate and a hot runner device, the runner plate is arranged between the upper mold and the lower mold, the hot runner device comprises a diverter plate, a hot nozzle and a connecting block, the runner plate is provided with a hot runner mounting groove extending along its axial direction, the hot runner mounting groove is used to accommodate the diverter plate, the connecting block comprises a first contact surface and a second contact surface, the first contact surface is parallel to a horizontal plane, the second contact surface is located at the lower end of the first contact surface and is inclined relative to the first contact surface, the diverter plate and the first contact surface are in a plane fit, the hot nozzle and the second contact surface are in an inclined fit, a mold core mounting groove is provided on the side of the lower mold away from the runner plate, a mold core is fixed in the mold core mounting groove, an oblique through hole connected to the mold core mounting groove is provided on the side of the lower mold facing the runner plate, and the hot nozzle extends into the mold core mounting groove from the oblique through hole.

[0006] In the above technical solution, the planar fit between the first contact surface of the flow splitter plate and the connecting block ensures the uniformity and stability of heat transfer, reduces the thermal resistance during heat transfer, and enables heat to be transferred to the nozzle more efficiently. Through the inclined fit between the second contact surface of the connecting block and the nozzle, the nozzle can extend into the mold core mounting groove at an inclined angle, thus meeting the glue injection requirements of the non-appearance inclined surface in the mold, reducing the cost and time consumption caused by adding additional structures (such as columns), and improving production efficiency. At the same time, the inclined fit between the nozzle and the connecting block also helps to optimize the flow path of the heat flow in the nozzle, reduce heat loss and backflow phenomena, and further improve the heat transfer efficiency. The utility model sets an inclined second contact surface on the connecting block, so that the nozzle and the second contact surface are in an inclined fit, allowing the nozzle to extend into the mold core mounting groove at an inclined angle, thus meeting the glue injection requirements of the non-appearance inclined surface in the mold, reducing the cost and time consumption caused by adding additional structures (such as columns), and improving production efficiency.

[0007] Further, the second contact surface is provided with a first mounting hole, and one end of the nozzle facing the second contact surface is provided with a guiding surface connected to the first mounting hole.

[0008] In the above technical solution, the design of the guiding surface enables the nozzle to more easily find and accurately align with the first mounting hole during the installation process, not only simplifying the installation steps but also improving the installation accuracy and efficiency. By precisely connecting the guiding surface of the nozzle with the first mounting hole on the connecting block, it can be ensured that the nozzle remains stable during the injection molding process and will not loosen or shift due to vibration or temperature changes.

[0009] Further, the second contact surface is also provided with a plurality of positioning pins, and a plurality of second mounting holes are provided on the periphery of the inclined through hole. The positioning pins are connected to the lower mold through the second mounting holes.

[0010] In the above technical solution, the positioning pins provided on the second contact surface play a role in precise positioning. When the nozzle extends into the mold core mounting groove through the inclined through hole, these positioning pins can ensure the accurate relative position between the nozzle and the lower mold, helping to avoid uneven flow of molten plastic or injection molding defects caused by the offset of the nozzle position during the injection molding process.

[0011] Further, bolts are symmetrically provided at the four corners of the flow splitter plate, and threaded holes matching the bolts are provided on one side of the lower mold facing the runner plate.

[0012] In the above technical solution, by symmetrically arranging bolts at the four corners of the flow splitter plate and mating them with the threaded holes on the lower mold, a firm connection can be ensured between the flow splitter plate and the lower mold. This connection method can withstand the huge pressure and vibration generated during the injection molding process, prevent the flow splitter plate from shifting or loosening, and thus ensure the stability and reliability of the injection molding process.

[0013] Furthermore, a runner insert is provided on the side of the flow splitter plate facing away from the connection block, and a casting port communicating with the runner insert is provided on the upper mold.

[0014] In the above technical solution, the connection between the casting port and the runner insert ensures that the molten plastic can be accurately injected into the mold.

[0015] Furthermore, a sealing ring is provided on the first contact surface, and when the connection block is connected to the flow splitter plate, the sealing ring abuts against the bottom end of the flow splitter plate.

[0016] In the above technical solution, leakage will not only cause heat loss and plastic waste, but may also affect the quality of the injection molded product and the stability of the production process. As a sealing element between the connection block and the flow splitter plate, the sealing ring can effectively prevent the molten plastic or hot flow from leaking at the connection.

[0017] Furthermore, a sealing groove with a shape adapted to the sealing ring and used for installing the sealing ring is provided on the first contact surface.

[0018] In the above technical solution, after the sealing ring is embedded in the sealing groove, it will be restricted by the groove wall, and thus be more firmly fixed on the connection block. This firm fixing method helps to prevent the sealing ring from shifting or falling off due to vibration or pressure during the injection molding process.

[0019] Furthermore, the sealing ring is made of copper.

[0020] In the above technical solution, copper is an excellent heat-conducting material with high thermal conductivity. In the hot runner system, using a copper sealing ring can transfer heat more effectively, help to keep the temperature of the molten plastic stable, and improve the injection molding efficiency.

[0021] Compared with the prior art, the beneficial effects of the present utility model are as follows: By providing a connection block including a first contact surface and a second contact surface, the flow splitter plate is in planar fit with the first contact surface, ensuring the uniformity and stability of heat transfer, reducing the thermal resistance in the heat transfer process, and enabling heat to be transferred to the nozzle more efficiently. The nozzle is in inclined fit with the second contact surface, enabling the nozzle to extend into the mold core installation groove at an inclined angle, thus meeting the gate injection requirements of the non-appearance inclined surface in the mold, reducing the cost and time consumption brought by adding additional structures (such as columns), and improving the production efficiency. Brief Description of the Drawings

[0022] Figure 1 This is a schematic structural view of a hot runner injection mold with oblique gating according to an embodiment of the present utility model.

[0023] Figure 2 This is a schematic structural view of a runner plate according to an embodiment of the present utility model.

[0024] Figure 3 This is a schematic structural view of a connecting block according to an embodiment of the present utility model.

[0025] Figure 4 This is a schematic structural view of a hot runner device according to an embodiment of the present utility model.

[0026] Figure 5 This is a schematic structural view of a hot nozzle according to an embodiment of the present utility model.

[0027] Figure 6 This is a schematic top view of an upper mold according to an embodiment of the present utility model.

[0028] Figure 7 This is a schematic bottom view of an upper mold according to an embodiment of the present utility model.

[0029] Description of the Reference Numerals in the Drawings

[0030] 1. Upper mold; 101. Casting port;

[0031] 2. Lower mold; 201. Mold core installation groove; 202. Oblique through hole; 203. Second installation hole; 204. Threaded hole;

[0032] 3. Runner plate; 301. Hot runner installation groove;

[0033] 4. Hot runner device; 401. Manifold plate; 4011. Bolt; 4012. Runner insert; 402. Hot nozzle; 4021. Guide surface; 403. Connecting block; 4031. First contact surface; 4031a. Sealing groove; 4032. Second contact surface; 4032a. First installation hole; 4032b. Positioning pin;

[0034] 5. Mold core; 6. Sealing ring. Detailed Embodiment

[0035] The oblique-gating hot runner injection mold of the present utility model will be further described in detail below in conjunction with specific embodiments and the accompanying drawings. The preferred embodiments of the present utility model are shown in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein.

[0036] Please refer to Figures 1 to 6, in a preferred embodiment, the hot runner injection mold with oblique gate injection of the present utility model includes an upper mold 1, a lower mold 2, a runner plate 3 and a hot runner device 4. The runner plate 3 is arranged between the upper mold 1 and the lower mold 2. The hot runner device 4 includes a manifold 401, a nozzle 402 and a connecting block 403. The runner plate 3 is provided with a hot runner installation groove 301 penetrating along its axial direction, and the hot runner installation groove 301 is used to accommodate the manifold 401. The connecting block 403 includes a first contact surface 4031 and a second contact surface 4032. The first contact surface 4031 is parallel to the horizontal plane, and the second contact surface 4032 is located at the lower end of the first contact surface 4031 and is inclined relative to the first contact surface 4031. The manifold 401 and the first contact surface 4031 are in planar fit, and the nozzle 402 and the second contact surface 4032 are in inclined surface fit. On the side of the lower mold 2 facing away from the runner plate 3, a cavity insert installation groove 201 is provided, and a cavity insert 5 is fixed in the cavity insert installation groove 201. On the side of the lower mold 2 facing the runner plate 3, an oblique through hole 202 communicating with the cavity insert installation groove 201 is provided, and the nozzle 402 extends into the cavity insert installation groove 201 from the oblique through hole 202.

[0037] In the schematic application of the above structure, the planar fit between the manifold 401 and the first contact surface 4031 of the connecting block 403 ensures the uniformity and stability of heat transfer, reduces the thermal resistance in the heat transfer process, and enables heat to be transferred to the nozzle more efficiently. Through the inclined surface fit between the second contact surface 4032 of the connecting block 403 and the nozzle 402, the nozzle 402 can extend into the cavity insert installation groove 201 at an oblique angle, thus meeting the injection requirements of the non-appearance inclined surface in the mold, reducing the cost and time consumption caused by adding additional structures (such as columns), and improving production efficiency. At the same time, the inclined surface fit between the nozzle 402 and the connecting block 403 also helps to optimize the flow path of the heat flow in the nozzle, reduce heat loss and backflow phenomenon, and further improve the heat transfer efficiency. The present utility model sets an inclined second contact surface 4032 on the connecting block 403, so that the nozzle 402 and the second contact surface 4032 are in inclined surface fit, allowing the nozzle 402 to extend into the cavity insert installation groove 201 at an oblique angle, thus meeting the injection requirements of the non-appearance inclined surface in the mold, reducing the cost and time consumption caused by adding additional structures (such as columns), and improving production efficiency.

[0038] Please refer to Figure 3 and Figure 5, in one embodiment, the second contact surface 4032 is provided with a first mounting hole 4032a, and one end of the hot nozzle 402 facing the second contact surface 4032 is provided with a guiding surface 4021 connected to the first mounting hole 4032a. The design of the guiding surface 4021 enables the hot nozzle 402 to more easily find and accurately align with the first mounting hole 4032a during the installation process, which not only simplifies the installation steps but also improves the installation accuracy and efficiency. By connecting the guiding surface 4021 of the hot nozzle 402 with the first mounting hole 4032a on the second contact surface 4032, it can be ensured that the hot nozzle 402 remains stable during the injection molding process and will not loosen or shift due to vibration or temperature changes. At the same time, when the hot nozzle 402 is installed on the second contact surface 4032 through the guiding surface 4021, it also helps to improve the sealing performance between the hot nozzle 402 and the connecting block 403 and reduce the risk of heat flow leakage.

[0039] Please refer to Figure 3 and Figure 6 , in one embodiment, the second contact surface 4032 is further provided with a plurality of positioning pins 4032b, and a plurality of second mounting holes 203 are provided on the circumferential side of the inclined through hole 202. The positioning pins 4032b are connected to the lower mold 2 through the second mounting holes 203. The positioning pins 4032b provided on the second contact surface 4032 play a role in precise positioning. When the hot nozzle 402 extends into the mold core mounting groove 201 through the inclined through hole 202, these positioning pins 4032b can ensure the relative position between the hot nozzle 402 and the lower mold 2 is accurate, which helps to avoid uneven flow of molten plastic or injection molding defects caused by the position deviation of the hot nozzle 402 during the injection molding process. The cooperative design of the positioning pins 4032b and the second mounting holes 203 simplifies the assembly process between the hot runner device 4 and the lower mold 2. The operator only needs to align the positioning pins 4032b with the second mounting holes 203 and fix them, without the need for complex adjustment and calibration work, which helps to improve the assembly accuracy and efficiency and reduce the production cost.

[0040] Please refer to Figure 4 and Figure 6, bolts 4011 are symmetrically arranged at the four corners of the manifold plate 401, and threaded holes 204 matching with the bolts 4011 are arranged on the side of the lower mold 2 facing the flow channel plate 3. By symmetrically arranging the bolts 4011 at the four corners of the manifold plate 401 and matching them with the threaded holes 204 on the lower mold 2, a stable connection between the manifold plate 401 and the lower mold 2 can be ensured. This connection method can withstand the huge pressure and vibration generated during the injection molding process, prevent the manifold plate from shifting or loosening, thereby ensuring the stability and reliability of the injection molding process. At the same time, the design of the bolt 4011 connection makes the installation and removal of the manifold plate 401 relatively easy. When the mold is maintained or the manifold plate 401 is replaced, the manifold plate 401 can be removed from the lower mold 2 by simply loosening the bolts 4011, without the need for complicated disassembly work, which helps to shorten the downtime of the mold and improve production efficiency.

[0041] Please refer to Figure 1 A flow channel insert 4012 is provided on the side of the manifold 401 away from the connecting block 403, and the upper mold 1 is provided with a casting port 101 connected to the flow channel insert 4012. The connection between the casting port 101 and the flow channel insert 4012 ensures that the molten plastic can be accurately injected into the mold.

[0042] Please refer to Figure 3 The first contact surface 4031 is provided with a sealing ring 6. When the connection block 403 is connected to the manifold 401, the sealing ring 6 abuts against the bottom end of the manifold 401. Leakage not only causes heat loss and plastic waste, but also may affect the quality of the injection molded product and the stability of the production process. The sealing ring 6, as a sealing element between the connection block and the manifold 401, can effectively prevent the leakage of molten plastic or heat flow at the connection.

[0043] At the same time, the first contact surface 4031 is provided with a sealing groove 4031a whose shape matches the sealing ring 6 and is used to install the sealing ring 6. After the sealing ring 6 is embedded in the sealing groove 4031a, it will be constrained by the groove wall, so that it is more firmly fixed on the connecting block 403. This stable fixing method helps to prevent the sealing ring 6 from shifting or falling off due to vibration or pressure during the injection molding process. The shape of the sealing groove 4031a is adapted to the sealing ring 6, ensuring close contact between the two. This close contact can more effectively prevent the leakage of molten plastic or heat flow at the connection point, and improve the sealing performance of the hot runner system.

[0044] It should be noted that the material of the sealing ring 6 is copper. Copper is an excellent heat-conducting material with high thermal conductivity. In the hot runner system, the use of the copper sealing ring 6 can transfer heat more effectively, help maintain the temperature of the molten plastic stable, and improve the injection molding efficiency.

[0045] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0046] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0047] In the present utility model, unless otherwise clearly defined and limited, terms such as "mounted", "connected", "connected to", "fixed" and the like should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0048] Although the description of the present utility model is made in combination with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and changes based on the above content. Therefore, all such substitutions, improvements and changes are included within the spirit and scope of the appended claims.

Claims

1. A hot runner injection mold with oblique injection, characterized in that: It comprises an upper die, a lower die, a runner plate and a hot runner device, the runner plate is arranged between the upper die and the lower die, the hot runner device comprises a diverter plate, a hot nozzle and a connecting block, the runner plate is provided with a hot runner mounting groove extending along its axial direction, the hot runner mounting groove is used to accommodate the diverter plate, the connecting block comprises a first contact surface and a second contact surface, the first contact surface is parallel to the horizontal plane, the second contact surface is located at the lower end of the first contact surface and is inclined relative to the first contact surface, the diverter plate and the first contact surface are in a plane fit, the hot nozzle and the second contact surface are in an inclined fit, a mold core mounting groove is provided on the side of the lower die away from the runner plate, a mold core is fixed in the mold core mounting groove, an oblique through hole connected to the mold core mounting groove is provided on the side of the lower die facing the runner plate, and the hot nozzle extends into the mold core mounting groove from the oblique through hole.

2. The hot runner injection mold with oblique injection according to claim 1, characterized in that: The second contact surface is provided with a first mounting hole, and one end of the hot nozzle facing the second contact surface is provided with a guide surface connected to the first mounting hole.

3. The hot runner injection mold with oblique injection according to claim 1, characterized in that: The second contact surface is further provided with a plurality of positioning pins, and the peripheral side of the oblique through hole is provided with a plurality of second mounting holes, and the positioning pins are connected to the lower mold through the second mounting holes.

4. The hot runner injection mold with oblique injection according to claim 1, characterized in that: Bolts are symmetrically arranged at the four corners of the manifold plate, and threaded holes matching with the bolts are arranged on one side of the lower mold facing the flow channel plate.

5. The hot runner injection mold with oblique injection according to claim 1, characterized in that: A flow channel insert is provided on one side of the diverter plate away from the connecting block, and the upper mold is provided with a casting port communicated with the flow channel insert.

6. The hot runner injection mold with oblique injection according to claim 1, characterized in that: The first contact surface is provided with a sealing ring, and when the connecting block is connected to the diverter plate, the sealing ring abuts against the bottom end of the diverter plate.

7. The hot runner injection mold with oblique injection according to claim 6, characterized in that: The first contact surface is provided with a sealing groove whose shape matches that of the sealing ring and is used for installing the sealing ring.

8. The hot runner injection mold with oblique injection according to claim 6, characterized in that: The sealing ring is made of copper.

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