An injection mold with a hot runner flow channel interconnection structure

Abstract

This utility model discloses an injection mold with a hot runner flow guiding and interconnecting structure, including an upper mold with an internal mounting groove containing a hot runner mechanism. The hot runner mechanism includes an upper runner plate and a lower runner plate, each containing a main runner and multiple branch runners. The main runner and branch runners have semi-circular cross-sections, and the upper and lower runner plates combine to form a complete circle. Each of the branch runners contains a flow guiding and interconnecting component, which includes a guide tube and a flow regulating component. This utility model relates to the field of injection mold technology. This injection mold with a hot runner flow guiding and interconnecting structure makes the flow of molten plastic more uniform in the branch runners and main runner through the hot runner mechanism, thereby avoiding molding defects caused by uneven flow. Furthermore, the flow regulating component further optimizes the flow stability of the molten plastic.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an injection mold with a hot runner flow guiding and interconnecting structure. Background Technology

[0002] Molds are various molds and tools used in industrial production to obtain desired products through methods such as injection molding, blow molding, extrusion, die casting, forging, smelting, and stamping. In short, molds are tools used to make shaped objects. These tools are composed of various parts, and different molds are composed of different parts. They mainly achieve the processing of the shape of the object by changing the physical state of the material being molded.

[0003] The patent publication number CN223071856U discloses an injection mold with a hot runner flow channel interconnection structure, including: a stationary module, a working groove is provided at the bottom of the stationary module, a heating groove is provided on one side of the inner wall of the working groove, limit posts are evenly fixedly connected to the four corners of the top of the stationary module, and an interconnection flow channel is provided at the top of the stationary module; a heating component, one side of the heating component is fixedly connected to one side of the inner wall of the working groove.

[0004] As described above, existing hot runner structures often lack efficient flow guidance and interconnection functions, leading to uneven flow of molten plastic within the runner. This can easily result in insufficient filling or localized overheating, which not only affects the molding quality of the product but may also reduce the lifespan of the mold. Furthermore, traditional hot runner systems have complex structural designs, high maintenance costs, and are difficult to adapt to the needs of injection molded products of different shapes and sizes, limiting their flexibility and applicability. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides an injection mold with a hot runner flow guiding and interconnecting structure, which solves the problem of uneven flow within the flow channel in existing hot runner flow guiding and interconnecting structures.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: an injection mold with a hot runner guiding and interconnecting structure includes an upper mold, the upper mold having an installation groove inside, and a hot runner mechanism being provided inside the installation groove;

[0007] The hot runner mechanism includes an upper runner plate and a lower runner plate. Each of the upper and lower runner plates has a main flow channel and multiple branch flow channels inside. The main flow channel and branch flow channels have semi-circular cross-sections, and the upper and lower runner plates form a complete circle when combined. Each of the multiple branch flow channels has a flow guiding and interconnecting component inside. The flow guiding and interconnecting component includes a flow guiding cylinder and a flow regulating component. The surface of the flow guiding cylinder has two annular grooves, and each of the two annular sealing rings has an annular sealing ring inside. A spiral strip is provided at the inlet of the flow guiding cylinder.

[0008] Preferably, the top of the upper flow channel plate is fixedly connected to an injection port, which is connected to the main flow channel. The bottom of the upper flow channel plate is fixedly connected to two positioning blocks on the left and right. The top of the lower flow channel plate is provided with two positioning grooves on the left and right corresponding to the positions of the positioning blocks. Multiple sealing strips are also provided between the upper flow channel plate and the lower flow channel plate for sealing between them. The upper flow channel plate and the lower flow channel plate are fixed together by a first internal hex bolt.

[0009] Preferably, the upper flow channel plate is fixedly connected to two mounting blocks on both the left and right sides, and the mounting blocks are fixedly installed inside the mounting groove by second internal hex bolts.

[0010] Preferably, the flow regulating component includes a fixed plate and a protective box. The fixed plate is fixedly connected to the inner surface of the guide tube, and the protective box is fixedly connected to the outer surface of the guide tube. A fixed rod is fixedly connected to one side of the fixed plate, and a driven gear is rotatably connected to the surface of the fixed rod.

[0011] Preferably, a through hole is provided at the bottom of the fixed plate, and multiple flow holes are provided in the driven gear in a clockwise direction, and the flow holes are in the order of first connecting hole, second connecting hole, third connecting hole and fourth connecting hole.

[0012] Preferably, a drive motor is fixedly connected to one side of the protective box, and a drive gear is fixedly connected to one end of the output shaft of the drive motor extending into the interior of the protective box. The drive gear meshes with the driven gear for transmission.

[0013] Beneficial effects

[0014] This invention provides an injection mold with a hot runner flow guiding and interconnecting structure. Compared with the prior art, it has the following advantages:

[0015] 1. This injection mold with a hot runner flow-through structure includes an upper runner plate and a lower runner plate. Both the upper and lower runner plates have a main runner and multiple branch runners inside. The main runner and branch runners have semi-circular cross sections. The hot runner mechanism makes the flow of molten plastic in the branch runners and main runner more uniform, thereby avoiding molding defects caused by uneven flow. The flow regulation component further optimizes the flow stability of the molten plastic and can be used for different molten plastics.

[0016] 2. The injection mold with a hot runner flow-through structure has an installation groove inside the upper mold. The hot runner mechanism is installed inside the installation groove. The hot runner mechanism includes an upper runner plate and a lower runner plate. The upper runner plate and the lower runner plate are fixed together by a first internal hex bolt. The design of the structure between the hot runner mechanism and the upper mold allows for quick installation and disassembly of the hot runner mechanism. The hot runner mechanism itself can also be assembled, which facilitates maintenance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the appearance of the present utility model;

[0018] Figure 2 This is a cross-sectional view of the present invention;

[0019] Figure 3 This is a schematic diagram of the hot runner mechanism of this utility model;

[0020] Figure 4 This is a cross-sectional view of the flow guiding and interconnecting component of this utility model;

[0021] Figure 5 This is a schematic diagram of the structure of this utility model.

[0022] In the diagram: 1. Upper mold; 2. Mounting groove; 3. Hot runner mechanism; 31. Upper runner plate; 32. Lower runner plate; 33. Main runner; 34. Branch runner; 35. Injection port; 36. Positioning block; 37. First hex socket head cap bolt; 38. Positioning groove; 39. Sealing strip; 4. Mounting block; 41. Second hex socket head cap bolt; 5. Flow guide interconnection assembly; 51. Flow guide tube; 52. Annular groove; 53. Annular sealing ring; 54. Spiral strip; 55. Flow regulating assembly; 551. Fixing plate; 552. Protective box; 553. Fixing rod; 554. Driven gear; 555. Drive motor; 556. Driving gear; 557. Through hole; 558. First connecting hole; 559. Second connecting hole; 5510. Third connecting hole; 5511. Fourth connecting hole. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-5 The injection mold with a hot runner interconnection structure offers two technical solutions:

[0025] The first embodiment includes an upper mold 1, and a hot runner mechanism 3 is provided inside the mounting groove 2. The hot runner mechanism 3 includes an upper runner plate 31 and a lower runner plate 32. Each of the upper runner plate 31 and the lower runner plate 32 has a main runner 33 and multiple branch runners 34. The main runner 33 and the branch runners 34 have semi-circular cross sections, and the upper runner plate 31 and the lower runner plate 32 form a complete circle after being combined. An injection port 35 is fixedly connected to the top of the upper runner plate 31, and the injection port 35 is connected to the main runner 33. Each of the multiple branch runners 34 has a flow guiding and interconnecting component 5. The flow guiding and interconnecting component 5 includes a flow guiding cylinder 51 and a flow regulating component 55. Two annular grooves 52 are opened on the surface of the flow guiding cylinder 51, and annular sealing rings 53 are provided inside the two annular sealing rings 53. A spiral strip 54 is provided at the inlet of the flow guiding cylinder 51.

[0026] The flow regulating assembly 55 includes a fixed plate 551 and a protective box 552. The fixed plate 551 is fixedly connected to the inner surface of the guide tube 51, and the protective box 552 is fixedly connected to the outer surface of the guide tube 51. A fixed rod 553 is fixedly connected to one side of the fixed plate 551, and a driven gear 554 is rotatably connected to the surface of the fixed rod 553. A through hole 557 is opened at the lower part of the interior of the fixed plate 551. Multiple flow holes are opened clockwise in sequence inside the driven gear 554, and the flow holes are, in sequence, a first connecting hole 558, a second connecting hole 559, a third connecting hole 5510, and a fourth connecting hole 5511. The first connecting hole 558 is a circular hole with the same shape and size as the through hole 557. The second connecting hole 559, the third connecting hole 5510, and the fourth connecting hole 5511 are... Each of the 5511 is composed of multiple uniformly opened small holes, and the size of the small holes in the second connecting hole 559, the third connecting hole 5510 and the fourth connecting hole 5511 decreases in sequence, thereby corresponding to molten plastics with different flow rates. The corresponding benchmark is that the larger the hole corresponds to the material with lower flow rate. That is, the material flow rate corresponding to the first connecting hole 558, the second connecting hole 559, the third connecting hole 5510 and the fourth connecting hole 5511 increases in sequence, thereby changing the flow rate of the molten plastic and making it flow evenly into the forming cavity of the mold. A drive motor 555 is fixedly connected to one side of the protective box 552. The output shaft of the drive motor 555 extends into the interior of the protective box 552 and is fixedly connected to a drive gear 556. The drive gear 556 meshes with the driven gear 554 for transmission.

[0027] The hot runner mechanism 3 makes the flow of molten plastic in the branch channel and the main channel more uniform, thereby avoiding molding defects caused by uneven flow. The flow regulation component 55 further optimizes the flow stability of the molten plastic and can be used for different molten plastics.

[0028] The second embodiment differs from the first embodiment in that: the upper mold 1 has an installation groove 2 inside, and a hot runner mechanism 3 is provided inside the installation groove 2. The hot runner mechanism 3 includes an upper runner plate 31 and a lower runner plate 32. Two front and rear mounting blocks 4 are fixedly connected to the left and right sides of the upper runner plate 31, and the mounting blocks 4 are fixedly installed inside the installation groove 2 by second internal hex bolts 41. Multiple sealing strips 39 are also provided between the upper runner plate 31 and the lower runner plate 32 for sealing between the upper runner plate 31 and the lower runner plate 32. Two left and right positioning blocks 36 are fixedly connected to the bottom of the upper runner plate 31, and two left and right positioning grooves 38 corresponding to the positions of the positioning blocks 36 are opened on the top of the lower runner plate 32. The upper runner plate 31 and the lower runner plate 32 are fixed together by first internal hex bolts 37.

[0029] The design of the structure between the hot runner mechanism 3 and the upper mold 1 allows for quick installation and disassembly of the hot runner mechanism 3, and the hot runner mechanism 3 itself can also be assembled, thus facilitating maintenance.

[0030] In use, molten plastic enters the main channel 33 from the injection port 35 and is automatically distributed to the branch channel 34, thus entering the guide tube 51. The spiral strip 54 ensures that the molten plastic flows evenly, and then it enters the through hole 557. The flow speed is changed according to the flow rate. Different flow speeds are used for molten plastics with different fluidity. When adjusting, the drive motor 555 is started, which makes the drive gear 556 rotate one revolution. The drive gear 556 rotates one revolution and transmits the power to the driven gear 554, causing the driven gear 554 to rotate 90 degrees, thereby aligning the corresponding flow orifice with the through hole 557.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An injection mold with a hot runner flow guiding and interconnecting structure, comprising an upper mold (1), characterized in that: The upper mold (1) has an installation groove (2) inside, and a hot runner mechanism (3) is provided inside the installation groove (2). The hot runner mechanism (3) includes an upper runner plate (31) and a lower runner plate (32). The upper runner plate (31) and the lower runner plate (32) each have a main runner (33) and multiple branch runners (34) inside. The main runner (33) and the branch runners (34) have a semi-circular cross section. The upper runner plate (31) and the lower runner plate (32) are combined to form a complete circle. The multiple branch runners (34) each have a flow guiding and interconnecting component (5) inside. The flow guiding and interconnecting component (5) includes a flow guiding cylinder (51) and a flow regulating component (55). The surface of the flow guiding cylinder (51) has two annular grooves (52), and the interior of the two annular grooves (52) is provided with an annular sealing ring (53). The inlet of the flow guiding cylinder (51) is provided with a spiral strip (54).

2. The injection mold with a hot runner flow guiding and interconnecting structure according to claim 1, characterized in that: The top of the upper flow channel plate (31) is fixedly connected to an injection port (35), and the injection port (35) is connected to the main flow channel (33). The bottom of the upper flow channel plate (31) is fixedly connected to two left and right positioning blocks (36), and the top of the lower flow channel plate (32) is provided with two left and right positioning grooves (38) corresponding to the positions of the positioning blocks (36). Multiple sealing strips (39) are also provided between the upper flow channel plate (31) and the lower flow channel plate (32) for sealing between the upper flow channel plate (31) and the lower flow channel plate (32). The upper flow channel plate (31) and the lower flow channel plate (32) are fixed by a first internal hex bolt (37).

3. The injection mold with a hot runner flow guiding and interconnecting structure according to claim 1, characterized in that: The upper flow channel plate (31) is fixedly connected to two front and rear mounting blocks (4) on both the left and right sides, and the mounting blocks (4) are fixedly installed inside the mounting groove (2) by the second internal hex bolt (41).

4. An injection mold with a hot runner flow guiding and interconnecting structure according to claim 1, characterized in that: The flow regulating component (55) includes a fixed plate (551) and a protective box (552). The fixed plate (551) is fixedly connected to the inner surface of the guide tube (51), and the protective box (552) is fixedly connected to the outer surface of the guide tube (51). A fixed rod (553) is fixedly connected to one side of the fixed plate (551), and a driven gear (554) is rotatably connected to the surface of the fixed rod (553).

5. An injection mold with a hot runner flow guiding and interconnecting structure according to claim 4, characterized in that: The fixed plate (551) has a through hole (557) at the bottom inside, and the driven gear (554) has multiple flow holes in a clockwise direction inside, and the flow holes are the first connecting hole (558), the second connecting hole (559), the third connecting hole (5510) and the fourth connecting hole (5511) in sequence.

6. An injection mold with a hot runner flow guiding and interconnecting structure according to claim 5, characterized in that: A drive motor (555) is fixedly connected to one side of the protective box (552). The output shaft of the drive motor (555) extends into the interior of the protective box (552) and is fixedly connected to a drive gear (556). The drive gear (556) meshes with the driven gear (554) for transmission.

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