Hot runner nozzle adjustment assembly and mold

Abstract

The present application relates to injection mold technical field, disclose a hot runner nozzle adjusting assembly module and fixed mould, including runner seat and nozzle, runner seat is distributed with several nozzle mounting seat, nozzle mounting seat includes fixedly arranged heating seat and rotates on the rotating seat of heating seat, the inside of rotating seat is hot flow chamber, the outer ring wall of rotating seat is equipped with annular slot, the runner seat is fixed with the sealing ring of annuous slot rotating seal cooperation, the flow channel is set between the adjacent hot flow chamber in the runner seat, the plug ring of sealing ring is set with the flow channel seal plug-in, the limiting part that allows or restricts rotating seat rotation is set on the runner seat, the upper end surface of rotating seat is provided with a plurality of assembly port that can be sealed connection nozzle or sealing plug, the inside of nozzle is elastically lifted with the ejector pin that blocks nozzle discharge port under normal state, the lifting of ejector pin is controlled to the power-on or power-off of high-temperature-resistant electromagnet, the adaptability of the module is high, can mass production and sale, reduce the manufacturing cost of fixed mould.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, and in particular to a hot runner nozzle adjustment assembly module and a fixed mold. Background Technology

[0002] An injection mold with a hot runner structure can be described by referring to the Chinese patent application No. 202410260625.5, which discloses a replaceable insert type two-color injection mold with a sensor and a hot runner structure. The mold has a cavity embedded in the fixed mold, and the cavity is provided with a replaceable insert structure. The insert structure has a hot runner inside.

[0003] Injection molding, such as Figure 14 When designing elongated automotive trim parts, multiple nozzles need to be distributed along the edge of the product within a molding cavity to ensure that the flow path during injection molding is not too long and can smoothly fill the cavity. Because different products have significant differences in length-to-width ratios and contour shapes, in the above design, the hot runner and nozzles are mounted on inserts, and their positions cannot be adjusted. This design can only accommodate one type of product; different products require replacement of the entire insert with the hot runner and nozzles, resulting in high replacement costs. Summary of the Invention

[0004] This invention addresses the shortcomings of existing molds where hot runners and nozzles are located inside replaceable inserts, with fixed nozzle positions and numbers, resulting in low insert adaptability and high costs, leading to high replacement costs. The primary objective of this invention is to provide a hot runner nozzle adjustment assembly module that can be mass-produced and adapted to various inserts. The inserts it adapts to do not require hot runners and nozzles, thereby significantly reducing the cost of the inserts.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] A hot runner nozzle adjustment assembly module includes a runner seat and several nozzles. The runner seat has multiple circular assembly slots, and each assembly slot contains a nozzle mounting seat. The nozzle mounting seat includes a rotating seat and a heating seat arranged vertically. The heating seat is fixed inside the assembly slot, and the rotating seat is rotatably mounted on the heating seat. The interior of the rotating seat is a hot runner chamber. The outer ring wall of the rotating seat has an annular slot communicating with the hot runner chamber. A sealing ring is fixed on the inner wall of the assembly slot to rotate and seal with the annular slot. Adjacent assembly slots are spaced apart. It has a connected flow channel, and the sealing ring has a protruding insertion ring that fits into the flow channel for sealing. The flow channel and the hot flow chamber form a hot flow channel. A limiting component for locking or unlocking the rotating seat is provided between the rotating seat and the flow channel seat. The upper end face of the rotating seat is provided with multiple assembly ports, and nozzles or sealing plugs can be sealed and connected to the assembly ports. A ejector pin is elastically raised and lowered inside the nozzle. Under normal conditions, the ejector pin blocks the outlet of the nozzle. A high-temperature resistant electromagnet is provided inside the flow channel seat. The raising and lowering of the ejector pin is controlled by the energized or de-energized state of the high-temperature resistant electromagnet.

[0007] Using the above solution, operators can adjust the position of the assembly port by rotating the rotary seat according to the requirements of different product cavities, thereby changing the installation position of the nozzle. The rotary seat is then limited by a limiting component. Operators can also assemble 0 to multiple nozzles on each rotary seat. Assembly ports without nozzles are sealed with sealing plugs. When the rotary seat rotates, it rotates and seals with the sealing ring fixed in the assembly groove to prevent material leakage. The position and number of nozzles in this module can be flexibly adjusted. The opening and closing of the nozzle outlet at any installation position can be controlled by energizing or de-energizing a high-temperature electromagnet. The fixed template or insert that works with it only needs to be provided with holes for the nozzles to pass through and cavities. This assembly module can reduce the cost of fixed templates or inserts and is compatible with multiple fixed templates or inserts. Its high adaptability also allows for mass production and widespread sales.

[0008] Preferably, the assembly port edge rotary seat has several radially spaced distributions.

[0009] By adopting the above scheme, the assembly nozzles are radially spaced along the rotating seat. As the rotating seat rotates, it can more comprehensively cover cavities of different sizes and shapes. In particular, for some product cavities with large radial dimension variations, nozzles can be installed at different radial positions to ensure that the heat flow can evenly fill each area of ​​the cavity, reducing product defects such as bubbles and shrinkage marks caused by uneven heat flow distribution, and further improving the quality and pass rate of injection molded products.

[0010] Preferably, the limiting component includes a toothed ring integrally formed on the upper outer ring wall of the rotating seat. The toothed ring is concentrically arranged with the rotating seat. Several limiting teeth are detachably fixed on the upper end face of the flow channel seat by bolts. Each limiting tooth can mesh with at least one toothed ring.

[0011] Using the above scheme, the gear ring engages with the limiting gear to lock the rotating seat. This gear-engaging limiting method offers high stability and reliability, effectively preventing accidental rotation of the rotating seat during injection molding due to vibration or other factors, thus ensuring nozzle position stability. Simultaneously, the limiting gear is detachably fixed to the runner seat with bolts. When adjusting the rotating seat position, simply unscrew the bolts to remove the limiting gear, and reinstall it after the rotating seat is in place. This simple and convenient operation reduces the workload for operators. Furthermore, each limiting gear engages with at least one gear ring; if multiple rotating seats are installed on the runner seat, adjustment time can be shortened.

[0012] Preferably, the sealing ring includes an annular metal skeleton and a first sealing element fixed to the upper and lower ends of the metal skeleton and sealingly engaged with the upper and lower ends of the annular slot. The insert ring is integrally formed with the metal skeleton of the same material, and the insert ring is provided with a second sealing element that seals with the flow groove. The first sealing element and the second sealing element are made of FFKM.

[0013] Using the above solution, the metal skeleton provides excellent support for the sealing ring, ensuring that the sealing ring is not easily deformed during the rotation of the rotating seat, and guaranteeing that the first sealing element and the upper and lower ends of the annular groove maintain a good sealing fit at all times. The insert ring and metal skeleton are integrally molded, enhancing the overall connection strength between the insert ring and the sealing ring, further improving the stability of the sealing structure. FFKM (perfluoroelastomer rubber) has excellent high-temperature resistance, maintaining good elasticity and sealing performance in high-temperature environments, and is not prone to aging, deformation, or failure. The first and second sealing elements are made of FFKM, effectively solving the problem of decreased sealing performance of traditional sealing materials at high temperatures, extending the service life of the sealing ring, and reducing equipment maintenance costs.

[0014] Preferably, the assembly port is provided with an internal thread, and the nozzle or sealing plug is screwed onto the assembly port. The upper end of the sealing plug has a drive groove to facilitate the rotation of the tool.

[0015] Using the above solution, the threaded connection provides excellent sealing and connection strength, effectively preventing heat leakage from the connection between the assembly port and the nozzle or sealing plug. The drive groove allows tools such as screwdrivers to be inserted, facilitating both the installation and removal of the sealing plug and the application of force to drive the rotating seat.

[0016] Preferably, a guide structure is provided between the high-temperature electromagnet and the ejector pin to ensure the vertical lifting and lowering of the ejector pin. The guide structure includes a guide groove recessed at the bottom of the ejector pin and a guide pin fixedly protruding on the high-temperature electromagnet. The number of guide pins is the same as the number of assembly ports and they are set one-to-one with the assembly ports. The guide pins are made of metal.

[0017] By adopting the above scheme, the guide structure can prevent the ejector pin from shifting or tilting, thus preventing problems such as poor material discharge and leakage caused by ejector pin shifting, and improving the accuracy of nozzle discharge control. The number of guide pins and the assembly port are consistent and correspond one-to-one, ensuring that the ejector pin inside any nozzle assembled on the rotary seat can be independently and accurately guided, further guaranteeing the stability and reliability of ejector pin movement.

[0018] The second objective of this invention is to provide a fixed mold, comprising a fixed mold base and a hot runner plate fixed on the fixed mold base, wherein a fixed template with a cavity is mounted on the upper end of the hot runner plate, characterized in that: an assembly cavity is recessed at the bottom of the hot runner plate, and the hot runner nozzle adjustment assembly module is assembled between the assembly cavity and the fixed mold base; a clearance circular groove corresponding to the assembly slot is provided at the upper end of the hot runner plate, and a support turntable is rotatably arranged on the clearance circular groove; the support turntable has clearance slots that expose all assembly ports and allow nozzles for assembly ports to pass through.

[0019] Using the above scheme, the fixed mold is equipped with the aforementioned hot runner nozzle adjustment assembly module, which has the advantage of adjustable nozzle position and number. This allows the fixed mold to adapt to fixed mold plates with various cavities. The fixed mold plate does not need to be equipped with nozzles or have built-in hot runners, significantly reducing costs. The turntable is used to accommodate the rotation adjustment of the rotary seat, and the slotted opening allows the assembled nozzles to pass through the turntable.

[0020] Preferably, the fixed template includes several frame seats that can be selectively assembled on the upper end of the fixed mold base and have different assembly grooves. The bottom of the assembly groove of each frame seat is provided with a clearance groove through which the nozzles with adjusted positions can pass in sequence. Each frame seat has at least two inserts with different cavities but which can share nozzles that can be detachably fixed inside.

[0021] The above-described design employs multiple selectively assembleable frame seats, each with different assembly grooves. Operators can select the appropriate frame seat to assemble on the fixed mold base according to the production requirements. The assembly grooves of different frame seats, combined with clearance grooves, can be adapted to the adjusted nozzle position, allowing the fixed mold to further adapt to more different types and structures of products, thus expanding its applicability. Each frame seat contains at least two inserts with different cavities but sharing a nozzle. When producing products with different cavities, there is no need to replace the frame seat or adjust the nozzle position; simply remove the original insert and install the insert corresponding to the cavity. This design not only reduces auxiliary operation time during insert replacement and improves production changeover efficiency, but also reduces the number of nozzles used and lowers equipment procurement and maintenance costs by allowing multiple inserts to share a single nozzle.

[0022] Preferably, a protective bushing is detachably fixed to the bottom of the mounting groove of the frame base by bolts. This bushing is fitted over the nozzle to prevent accidental contact with the nozzle when replacing the insert. The insert has a through groove through which the protective bushing can pass.

[0023] By adopting the above solution, the protective bushing is installed outside the nozzle. During the replacement of the insert, it can effectively prevent accidental contact such as collision or friction between the operator or the insert and the nozzle, prevent the nozzle from being damaged, deformed or displaced due to external forces, ensure the normal working condition of the nozzle, extend the service life of the nozzle, and reduce equipment maintenance costs and the risk of production interruption.

[0024] Preferably, the inner top of the protective bushing is configured as a tapered opening with the tip pointing upwards.

[0025] Using the above solution, the conical design can achieve a sealing effect on the glue position.

[0026] This invention, by adopting the above technical solutions, has significant technical effects:

[0027] The nozzle position can be freely adjusted by rotating the rotating seat and cooperating with the limiting components; multiple assembly ports, combined with the flexible selection of nozzles and sealing plugs, allow for on-demand configuration of the number of nozzles; the fixed mold further expands its adaptability range through selective assembly of the frame base and detachable design of the inserts, which can meet the injection molding needs of various cavities and specifications of products, overcome the limitations of traditional molds with single adaptability, greatly improve versatility and utilization, and thus enable mass production and independent sales.

[0028] It adopts a double sealing structure of sealing ring and annular groove, insertion ring and flow groove, and uses high temperature resistant FFKM material to make the sealing parts, which effectively prevents the leakage of molten material;

[0029] High-temperature resistant electromagnets control the lifting and lowering of ejector pins. Guided by the guide structure, ejector pins inside nozzles at any installation position can achieve vertical movement, enabling precise control of nozzle discharge and improving product molding accuracy. Attached Figure Description

[0030] Figure 1 This is the isometric view of the hot runner nozzle adjustment assembly module in this embodiment. Figure 1 ;

[0031] Figure 2 This is the isometric view of the hot runner nozzle adjustment assembly module in this embodiment. Figure 2 ;

[0032] Figure 3 This is an isometric view of the rotary seat after the nozzle is assembled in this embodiment;

[0033] Figure 4 This is a front view of the rotary seat after the nozzle is assembled in this embodiment;

[0034] Figure 5 yes Figure 4 A sectional view of AA;

[0035] Figure 6 yes Figure 4 A cross-sectional view of BB;

[0036] Figure 7 This is an isometric view of the hot runner nozzle adjustment assembly module placed on the fixed mold base in this embodiment;

[0037] Figure 8 This is an isometric view of the hot runner plate and the fixed mold base after assembly in this embodiment;

[0038] Figure 9 This is an isometric view of the frame mounting on the hot runner plate in this embodiment;

[0039] Figure 10 yes Figure 9 Axonometric view after the protective bushing is installed;

[0040] Figure 11 This is an isometric view of a fixed mold in this embodiment;

[0041] Figure 12 This is an isometric view of the limiting gear in this embodiment;

[0042] Figure 13 This is an isometric view of the heating wire in this embodiment;

[0043] Figure 14 It is an existing long strip-shaped automotive plastic trim piece.

[0044] The parts referred to by the numbers in the above attached figures are as follows: 1. Runner seat; 2. Assembly groove; 3. Heating seat; 4. Flow groove; 5. Rotary seat; 501. Hot runner chamber; 503. Connecting column; 502. Assembly port; 6. Gear ring; 7. Sealing plug; 701. Drive groove; 8. Nozzle; 9. Limiting gear; 901. Anti-rotation protrusion; 10. Heating wire; 11. Sealing ring; 1101. Metal skeleton; 1102. First seal; 12. Insert ring; 13. Second seal; 14. High temperature resistant electromagnet; 15. Guide pin; 16. Ejector pin; 17. Spring; 18. Fixed mold base; 19. Hot runner plate; 20. Support turntable; 21. Relief slot; 22. Frame seat; 23. Assembly groove; 24. Protective bushing; 25. Insert; 26. Cavity. Detailed Implementation

[0045] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0046] A fixed mold includes a fixed mold base 18 and a hot runner plate 19 fixed on the fixed mold base 18, see reference. Figures 7-8 As shown, a fixed mold plate with cavity 26 is mounted on the upper end of the hot runner plate 19, and an assembly cavity is recessed at the bottom of the hot runner plate 19. A hot runner nozzle adjustment assembly module is mounted between the assembly cavity and the fixed mold base 18.

[0047] Hot runner nozzle adjustment assembly module, refer to Figures 1-2 As shown, the device includes a flow channel seat 1 and several nozzles 8 of varying lengths. The flow channel seat 1 has multiple circular mounting slots 2 arranged in a matrix. In this embodiment, the mounting slots 2 are arranged in two rows of five. Each mounting slot 2 contains a nozzle mounting seat, which includes a rotating seat 5 positioned vertically and a heating seat 3. The heating seat 3 is fixed within the mounting slot 2, and its bottom has a spiral mounting groove. A heating wire 10 is embedded within the spiral mounting groove. Figure 13 As shown, the heating wires 10 are spirally distributed, and the rotating seat 5 is rotatably mounted on the heating seat 3. The interior of the rotating seat 5 is a heat flow chamber 501. Figures 4-6 As shown, the outer ring wall of the rotating seat 5 is provided with an annular slot that communicates with the hot flow chamber 501. The upper and lower ends of the rotating seat 5 are connected by several connecting columns 503. The inner wall of the assembly groove 2 is fixed with a sealing ring 11 that rotates and seals with the annular slot. A flow groove 4 is provided between adjacent assembly grooves 2. The sealing ring 11 is provided with a plug ring 12 that seals and inserts with the flow groove 4. The flow groove 4 and the hot flow chamber 501 form a hot flow channel.

[0048] The sealing ring 11 includes an annular metal skeleton 1101 and a first sealing element 1102 fixed to the upper and lower ends of the metal skeleton 1101 and sealingly engaged with the upper and lower ends of the annular slot. The cross-section of the first sealing element 1102 is stepped. The insert ring 12 is integrally formed with the metal skeleton 1101 of the same material, which can be stainless steel. A second sealing element 13 is provided between the insert ring 12 and the inner wall of the flow groove 4. The second sealing element 13 is a ring sleeve fitted on the end of the insert ring 12. The first sealing element 1102 and the second sealing element 13 are made of FFKM.

[0049] The upper end face of the rotating base 5 is provided with a plurality of assembly ports 502 at radial intervals, for connection Figure 3 and Figure 5 As shown, a nozzle 8 or a sealing plug 7 can be sealed and connected to the assembly port 502. The assembly port 502 is provided with an internal thread. The nozzle 8 or the sealing plug 7 is sealed and screwed onto the assembly port 502. The upper end of the sealing plug 7 is recessed with a drive groove 701 to facilitate the tool to drive its rotation. The drive groove 701 is a hexagonal groove.

[0050] The nozzle 8 has a spring-loaded lifting pin 16 inside, as shown in the reference. Figure 5As shown, a limit ring is provided on the outer wall of the ejector pin 16. A spring 17 is fitted on the ejector pin 16, with its two ends elastically abutting against the bottom of the nozzle 8 and the limit ring, respectively. The spring 17 is made of stainless steel. Under the drive of the spring 17, the ejector pin 16 is in a state of sealing the outlet of the nozzle 8. A high-temperature resistant electromagnet 14 is provided in the flow channel seat 1. The raising and lowering of the ejector pin 16 is controlled by the energization or de-energization of the high-temperature resistant electromagnet 14. The ejector pin 16 is made entirely of iron or partially of iron at the bottom. When the high-temperature resistant electromagnet 14 is energized, the ejector pin 16 descends and the outlet of the nozzle 8 opens; when the high-temperature resistant electromagnet 14 is de-energized, the ejector pin 16 rises and the outlet of the nozzle 8 closes.

[0051] The high-temperature resistant electromagnet 14 is composed of a magnetic core and coil insulation material. The magnetic core is made of soft iron, whose magnetism can be stabilized up to 700℃. The coil insulation material includes high-temperature resistant enameled wire, coil frame and insulation material. The high-temperature resistant enameled wire is coated with polyimide or PTFE and can withstand temperatures of 250℃ and above. The coil frame is made of ceramic. After the coil is wound, it is encapsulated with high-temperature resistant silicone varnish. The lead wire is made of high-temperature resistant wire with Teflon insulation. The lead wire is sealed and passes out to the upper end of the rotating base 5. The lead wire is in a relaxed state and can adapt to the 360° rotation of the rotating base 5.

[0052] A guide structure is provided between the high-temperature resistant electromagnet 14 and the ejector pin 16 to ensure the vertical lifting and lowering of the ejector pin 16, as shown in the reference. Figure 5 As shown, the guide structure includes a guide groove recessed at the bottom of the ejector pin 16 and a guide pin 15 fixedly protruding on the high-temperature electromagnet 14. The number of guide pins 15 is the same as that of the assembly ports 502 and they are arranged in a one-to-one correspondence with the assembly ports 502. The guide pins 15 are made of stainless steel or iron.

[0053] A limiting component for locking or unlocking the rotary seat 5 is provided between the rotary seat 5 and the flow channel seat 1, as shown in the figure. Figure 1 and Figure 12 As shown, the limiting component includes a toothed ring 6 integrally formed on the upper outer ring wall of the rotating seat 5. The toothed ring 6 is concentrically arranged with the rotating seat 5. Several limiting teeth 9 are detachably fixed on the upper end face of the flow channel seat 1 by bolts. Each limiting tooth 9 can mesh with at least one toothed ring 6. In this embodiment, each limiting tooth 9 can mesh with 4 toothed rings 6 at the same time. A regular hexagonal anti-rotation protrusion 901 is protruding from the center bottom of the limiting tooth 9. An anti-rotation groove is recessed at the upper end of the flow channel seat 1 for the anti-rotation protrusion 901 to be inserted. The bolt passes through the limiting tooth block and the anti-rotation protrusion 901 in sequence and is screwed into the threaded groove at the bottom of the anti-rotation groove.

[0054] A clearance groove corresponding to the assembly groove 2 is provided at the upper end of the hot runner plate 19. A support turntable 20 is rotatably mounted on the clearance groove. Figure 8As shown, the support turntable 20 has a clearance slot 21 that exposes all the assembly ports 502 and allows the nozzles 8 that are assembled in the assembly ports 502 to pass through. The outer ring wall of the support turntable 20 has a guide groove. The inner wall of the clearance slot has a support guide block that cooperates with the guide groove. The support guide block is ring-shaped or block-shaped. If it is ring-shaped, it is concentric with the support turntable 20. If it is block-shaped, it is circumferentially spaced and protrudes from the inner wall of the clearance slot, and there are at least three of them.

[0055] The fixed template includes several frame seats 22 that can be selectively assembled on the upper end of the fixed mold base 18 and have different assembly grooves 23, as shown in the figure. Figures 9-11 As shown, the frame base 22 is fixedly connected to the fixed mold base 18 by several bolts. The bottom of the mounting groove 23 of each frame base 22 is provided with a clearance groove through which the nozzle 8, which has been adjusted in position, can pass in sequence. Each frame base 22 is detachably fixed with at least two inserts 25 with different cavities 26 but can share the nozzle 8 by bolts. The interior of these inserts 25 is provided with cooling channels through which cooling water or cooling gas can pass.

[0056] A protective bushing 24, which is detachably fixed to the bottom of the mounting groove 23 of the frame base 22 by bolts, is sleeved on the outside of the nozzle 8 to prevent accidental contact with the nozzle 8 when replacing the insert 25. (Refer to...) Figure 10 As shown, the inner top of the protective bushing 24 is set into a tapered shape with the tip pointing upwards, and the insert 25 has a through groove through which the protective bushing 24 can pass.

[0057] The adaptation adjustment process between the hot runner nozzle adjustment assembly module and the frame 22 is as follows:

[0058] 1. Select a suitable frame seat 22 based on the cavity 26 structure of the product to be injection molded;

[0059] 2. Select the rotary disk where the nozzle 8 needs to be installed based on the position of the clearance groove on the frame base 22;

[0060] 3. Based on the position of the clearance groove on the frame base 22, rotate the rotating seat 5 to the required angle, and then use the limiting toothed ring 6 to limit it;

[0061] 4. Locate the fitting port 502 for nozzle 8 based on the position of the clearance groove on the frame base 22;

[0062] 5. Select a nozzle 8 with appropriate height and diameter based on the distance from the groove of the insert 25 to the fixed mold base 18 of the product to be injected;

[0063] 6. Install the selected nozzles 8 sequentially onto the selected assembly ports 502;

[0064] 7. Assemble the flow seat nozzle adjustment assembly module between the assembly cavity of the hot runner plate 19 and the flow seat 1, so that the nozzles 8 pass through the corresponding clearance slots 21 of the support turntable 20 in sequence.

[0065] 8. Fix the frame base 22 to the upper end face of the hot runner plate 19, and let the nozzles 8 pass through the clearance groove of the fixed mold base 18 in sequence;

[0066] 9. Install protective bushings 24 sequentially on the fixed mold base 18;

[0067] 10. Fix the insert 25 on the frame base 22, and the protective bushing 24 passes through the corresponding slot of the insert 25 in sequence.

[0068] For replacing several inserts 25 with different cavities 26 that can be adapted to a frame 22, only the inserts 25 need to be removed and installed.

[0069] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A hot runner nozzle adjustment assembly module, comprising a runner seat (1) and a plurality of nozzles (8), characterized in that, The flow channel seat (1) is provided with multiple circular assembly slots (2). Each assembly slot (2) is provided with a nozzle mounting seat. The nozzle mounting seat includes a rotating seat (5) and a heating seat (3) arranged vertically. The heating seat (3) is fixed in the assembly slot (2). The rotating seat (5) is rotatably mounted on the heating seat (3). The interior of the rotating seat (5) is a hot flow chamber (501). The outer ring wall of the rotating seat (5) is provided with an annular slot communicating with the hot flow chamber (501). The inner wall of the assembly slot (2) is fixed with a sealing ring (11) that rotates and seals with the annular slot. A flow passage (4) is provided between adjacent assembly slots (2). The sealing ring (11) is provided with a protrusion that communicates with the flow passage. (4) A sealing and plugging ring (12) is provided. The flow groove (4) and the hot flow chamber (501) form a hot flow channel. A limiting component for locking or unlocking the rotating seat (5) is provided between the rotating seat (5) and the flow channel seat (1). Multiple assembly ports (502) are provided on the upper end face of the rotating seat (5). A nozzle (8) or a sealing plug (7) can be sealed and connected on the assembly port (502). A pin (16) is provided inside the nozzle (8) with elastic lifting. The pin (16) blocks the outlet of the nozzle (8) under normal conditions. A high temperature resistant electromagnet (14) is provided inside the flow channel seat (1). The lifting of the pin (16) is controlled by the energized or de-energized state of the high temperature resistant electromagnet (14).

2. The hot runner nozzle adjustment assembly module according to claim 1, characterized in that: There are several assembly ports (502) distributed at radial intervals along the rotating seat (5).

3. The hot runner nozzle adjustment assembly module according to claim 1, characterized in that: The limiting component includes a toothed ring (6) integrally formed on the upper outer ring wall of the rotating seat (5). The toothed ring (6) is concentrically arranged with the rotating seat (5). Several limiting teeth (9) are detachably fixed on the upper end face of the flow channel seat (1) by bolts. Each limiting tooth (9) can mesh with at least one toothed ring (6).

4. A hot runner nozzle adjustment assembly module according to claim 1, characterized in that: The sealing ring (11) includes an annular metal skeleton (1101) and a first sealing element (1102) fixed to the upper and lower ends of the metal skeleton (1101) and sealingly engaged with the upper and lower ends of the annular slot. The insert ring (12) is integrally formed with the metal skeleton (1101) of the same material. The insert ring (12) is provided with a second sealing element (13) that seals it with the flow groove (4). The first sealing element (1102) and the second sealing element (13) are made of FFKM.

5. A hot runner nozzle adjustment assembly module according to claim 1 or 2, characterized in that: The assembly port (502) is provided with an internal thread, and the nozzle (8) or sealing plug (7) is sealed and screwed onto the assembly port (502). The upper end of the sealing plug (7) is recessed with a drive groove (701) to facilitate the tool to drive its rotation.

6. A hot runner nozzle adjustment assembly module according to claim 1 or 2, characterized in that: A guide structure is provided between the high-temperature electromagnet (14) and the ejector pin (16) to ensure the vertical lifting and lowering of the ejector pin (16). The guide structure includes a guide groove recessed at the bottom of the ejector pin (16) and a guide pin (15) fixedly protruding on the high-temperature electromagnet (14). The number of guide pins (15) is the same as that of the assembly port (502) and they are set one-to-one with the assembly port (502). The guide pins (15) are made of metal.

7. A fixed mold, comprising a fixed mold base (18) and a hot runner plate (19) fixed on the fixed mold base (18), wherein a fixed mold plate with a cavity (26) is assembled on the upper end of the hot runner plate (19), characterized in that: The bottom of the hot runner plate (19) is recessed with an assembly cavity. A hot runner nozzle adjustment assembly module as described in any one of claims 1-6 is assembled between the assembly cavity and the fixed mold base (18). A clearance circular groove corresponding to the assembly groove (2) is opened at the upper end of the hot runner plate (19). A support turntable (20) is rotatably arranged on the clearance circular groove. A clearance slot (21) is opened on the support turntable (20) to expose all the assembly ports (502) and to allow the nozzles (8) assembled in the assembly ports (502) to pass through.

8. A fixed mold according to claim 7, characterized in that: The fixed template includes several frame seats (22) that can be selectively assembled on the upper end of the fixed mold base (18) and have different assembly grooves (23). The bottom of the assembly groove (23) of each frame seat (22) is provided with a clearance groove through which the nozzle (8) can be adjusted in position. Each frame seat (22) has at least two inserts (25) with different cavities (26) but can share the nozzle (8).

9. A fixed mold according to claim 8, characterized in that: A protective bushing (24) is detachably fixed to the bottom of the mounting groove (23) of the frame base (22) by bolts. It is sleeved outside the nozzle (8) to prevent accidental contact with the nozzle (8) when replacing the insert (25). The insert (25) has a through groove through which the protective bushing (24) can pass.

10. A fixed mold according to claim 9, characterized in that: The inner top of the protective bushing (24) is set in a cone shape with the tip pointing upward.

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