Nozzle temperature sensing mold

Abstract

The present application relates to a kind of nozzle temperature sensing mould, including upper layer plate, middle layer plate and lower layer plate, upper layer plate outside is equipped with the interface for connecting injection molding machine platform, between the inside of upper layer plate and the outside of middle layer plate is equipped with the main shunt plate communicated with interface, end angle of main shunt plate is equipped with shunt nozzle, first temperature measurement module is equipped on main shunt plate, middle layer plate is equipped with the accommodation opening for shunt nozzle to pass out, lower layer plate is equipped with the secondary shunt plate communicated with shunt nozzle, multiple injection nozzles are equipped on secondary shunt plate, installation opening is equipped on lower layer plate for injection nozzle to extend, second temperature measurement module is equipped on the periphery of injection nozzle, the temperature of nozzle is detected in real time by first temperature measurement module and second temperature measurement module multiple levels.It has the following advantages and effects: the temperature of each nozzle can be detected, so as to adjust the temperature of each nozzle, so as to ensure that the quality and the amount of melt of each injection are uniform, reduce the difference between product batches.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, and more specifically to a nozzle temperature sensing mold. Background Technology

[0002] Injection molding is a process in which plastic is melted by an injection molding machine and injected into an injection mold through a nozzle. After cooling, the plastic product is formed into a specified shape within the injection mold.

[0003] For example, Chinese patent document CN116749450B discloses a multi-nozzle injection mold for producing rubber and plastic parts for new energy vehicles, which relates to the field of injection mold technology. It includes a frame, a fixed module, a feeding module, and a movable module. The fixed module, feeding module, and movable module are arranged horizontally in sequence, and all three modules are located inside the frame. This invention sets up a frame, and the fixed module, feeding module, and movable module are arranged inside the frame.

[0004] In the above technical solution, multiple mold cores are set inside the fixed module, and multiple molding seats are set inside the movable module. The cooperation of multiple mold cores and multiple molding seats can realize the simultaneous injection molding production of multiple sets of rubber parts, thereby improving production efficiency. Because multiple nozzles are set, in order to ensure the molding quality of the product at each nozzle, the temperature of each nozzle needs to be monitored to ensure that the temperature of each nozzle is within a reasonable range. However, in the above technical solution, it is not possible to monitor the temperature of each nozzle, thus failing to ensure that the melt quality and injection quantity of each injection are uniform, reducing batch-to-batch variations and ensuring production quality. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a nozzle temperature-sensing mold that can detect the temperature of each nozzle, thereby facilitating the adjustment of the temperature of each nozzle and ensuring uniform melt quality and injection quantity in each injection, thus reducing batch-to-batch variations.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a nozzle temperature-sensing mold, comprising an upper plate, a middle plate, and a lower plate. The outer side of the upper plate is provided with an interface for connecting to an injection molding machine base. A main flow divider plate communicating with the interface is provided between the inner side of the upper plate and the outer side of the middle plate. A flow divider nozzle is provided at the corner of the main flow divider plate. A clearance port for the flow divider nozzle to pass through is provided on the middle plate. A secondary flow divider plate communicating with the flow divider nozzle is provided on the lower plate. A first temperature measuring module is provided on the main flow divider plate and the secondary flow divider plate respectively. A plurality of injection nozzles are provided on the secondary flow divider plate. An installation port for the injection nozzle to extend is provided on the lower plate. A second temperature measuring module is provided on the outer periphery of the injection nozzle. The nozzle temperature is detected in real time through the first and second temperature measuring modules.

[0007] The present invention is further configured such that: the main flow divider includes a flow guide and flow dividers disposed at both ends of the flow guide; a flow guide heating coil and a flow divider heating coil are respectively disposed on both sides of the flow guide and both sides of the flow divider; the first temperature measuring module is respectively disposed on the flow guide heating coil and the flow divider heating coil to detect the heating temperature of the flow guide heating coil and the flow divider heating coil, respectively; the first temperature measuring module includes a heat-conducting sheet and a first J-type thermocouple; one end of the first J-type thermocouple is connected to the heat-conducting sheet and the other end is connected to an external temperature controller; and the main flow divider and the secondary flow divider are respectively provided with slots for embedding the heat-conducting sheet.

[0008] The present invention is further configured such that: the second temperature measuring module includes a second J-type thermocouple and a temperature-conducting sleeve fitted around the outer periphery of the injection nozzle, one end of the second J-type thermocouple is connected to the temperature-conducting sleeve, and the other end is connected to an external temperature controller.

[0009] The present invention is further configured such that: the temperature-conducting sleeve includes a fixing part and a temperature-conducting part; the fixing part is fitted and fixed on the outer periphery of the injection nozzle; one end of the fixing part is provided with a compression pawl; there are multiple compression pawls evenly distributed around the circumference; the inner end of the compression pawl is provided with a guide surface that gradually shifts towards the axis along the nozzle tip direction; one end of the temperature-conducting part is provided with a coupling surface that matches the guide surface; by pushing the temperature-conducting part, the coupling surface gradually contacts the guide surface, thereby driving the compression pawl to radially compress the temperature-conducting part, so that the temperature-conducting part fully fits the outer periphery of the injection nozzle; the outer periphery of the temperature-conducting part is provided with a positioning port; one end of the second J-type thermocouple is inserted into the positioning port for fixation.

[0010] The present invention is further configured such that: a water pipe is provided on one side of the middle layer plate, and a cooling water channel is provided inside the middle layer plate in an interlaced manner, wherein the cooling water channel is connected to the water pipe.

[0011] The invention is further configured such that: a main through pipe is provided in the flow guide section, and main branch pipes that are intersected and interconnected are provided in the flow divider section; the end of the main through pipe is connected to the main branch pipe, and the end of the main branch pipe is connected to the branch nozzle; secondary branch pipes that are intersected and interconnected are provided in the secondary branch plate, and the secondary branch pipes are connected to the branch nozzle; and the injection nozzle is installed at the end of the secondary branch pipe.

[0012] The present invention is further configured such that: a first positioning groove adapted to the contour of the main diverter plate is provided between the inner side of the upper plate and the outer side of the middle plate; a second positioning groove adapted to the contour of the secondary diverter plate is provided on the lower plate; an upper plate wiring groove communicating with the first positioning groove is provided on the upper plate; the upper plate wiring groove communicating with the first positioning groove is used to store cables; and a lower plate wiring groove communicating with the second positioning groove is provided on the outer side of the lower plate; the lower plate wiring groove is used to store cables.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] 1. By installing a first temperature measuring module on the main and secondary manifolds and a second temperature measuring module on the outer periphery of the injection nozzles, a multi-level real-time temperature detection system is constructed, extending from the main and secondary manifolds to each injection nozzle. The first temperature measuring module independently detects the temperatures of the heating coils in the guide section, the manifold section, and the secondary manifold heating coil, enabling monitoring of the heating uniformity in different areas of the main and secondary manifolds. The second temperature measuring module individually detects the temperature at the end of each injection nozzle, allowing for timely detection of temperature anomalies in individual nozzles. This multi-level distributed temperature measurement architecture allows for comprehensive temperature monitoring of the entire flow channel system from the molten plastic inlet to the injection outlet. Operators can finely adjust the heating power based on the temperature data from each detection point, effectively avoiding problems such as plastic decomposition and carbonization due to excessively high local temperatures or decreased fluidity due to excessively low temperatures, significantly improving the dimensional stability and appearance quality of injection molded products.

[0015] 2. By employing a separate structure for the fixed and heat-conducting parts of the temperature-conducting sleeve, coupled with the guide surface design of the extrusion pawl, when the heat-conducting part is pushed towards the fixed part, the coupling surface and the guide surface slide relative to each other, generating a radial force. This causes the extrusion pawl to exert uniform radial pressure on the heat-conducting part, ensuring a full fit between the inner wall of the heat-conducting part and the outer periphery of the injection nozzle. This eliminates the heat conduction lag and measurement deviation caused by assembly gaps in traditional sleeve-type heat-conducting structures, significantly improving the response speed and accuracy of temperature detection. Simultaneously, the spiral guide channel on the outer periphery of the fixed part cooperates with the guide protrusions on the outer wall of the heat-conducting part. During rotational installation, this compresses the spring, using the spring force to ensure the guide protrusions tightly abut against the guide channel. This provides stable constraint on the heat-conducting part in both the axial and circumferential directions, preventing the temperature-conducting sleeve from loosening or falling off due to vibration or thermal expansion and contraction during mold operation, thus ensuring long-term reliability of temperature measurement.

[0016] 3. By extending the extrusion pawl axially and maintaining an axially continuous gap between adjacent extrusion pawls, which remains opposite to the positioning port on the outer periphery of the temperature-conducting part after the temperature-conducting part is installed, the insertion operation space of the second J-type thermocouple is not obstructed by the fixing part. The assembler can easily insert the thermocouple into the positioning port for fixing, which significantly reduces the difficulty of installation and the complexity of maintenance and replacement, and improves the assembly efficiency and maintainability of the mold.

[0017] 4. By setting an upper plate wiring groove that communicates with the first positioning groove on the upper plate and a lower plate wiring groove that communicates with the second positioning groove on the lower plate, a dedicated storage channel is provided for the signal lines of the first J-type thermocouple and the second J-type thermocouple, as well as the power lines of each heating coil. This ensures that the cables inside the mold are neatly organized and avoids the cables being squeezed, worn, or tangled during the mold closing process. This not only improves the reliability of the electrical connection but also facilitates daily maintenance and wiring replacement operations. Attached Figure Description

[0018] Figure 1 These are schematic diagrams of the overall structure of the present invention from different angles;

[0019] Figure 2 This is a schematic diagram showing the location of the main flow divider in this invention;

[0020] Figure 3 This is a schematic diagram showing the relationship between the main splitter plate and the secondary splitter plate in this invention;

[0021] Figure 4 This is a schematic diagram showing the relationship between the lower layer plate and the middle layer plate in this invention;

[0022] Figure 5 This is a schematic diagram of the specific structure of the upper plate in this invention;

[0023] Figure 6 This is a schematic diagram showing the specific structure of the middle layer plate at different angles in this invention;

[0024] Figure 7 This is a schematic cross-sectional view of the middle layer plate of the present invention;

[0025] Figure 8 This is a schematic diagram of the specific structure of the lower layer plate in this invention;

[0026] Figure 9 This is a schematic diagram showing the connection between the temperature-conducting sleeve and the injection nozzle in this invention;

[0027] Figure 10 This is a schematic cross-sectional view of the temperature-conducting sleeve in this invention;

[0028] Figure 11 This is a schematic diagram of the internal structure of the main flow divider in this invention;

[0029] Figure 12 This is a schematic diagram of the internal structure of the secondary flow divider in this invention.

[0030] In the diagram: Upper plate 1; Interface 101; Upper plate wiring groove 102; Middle plate 2; Clearance opening 21; Water pipe 22; Cooling water channel 23; Transition opening 24; Lower plate 3; Mounting opening 31; Second positioning groove 32; Lower plate wiring groove 33; Main diversion plate 4; Guide section 41; Main through pipe 411; Diversion section 42; Main diversion pipe 421; Diversion nozzle 5; Sub-diversion plate 6; Sub-diversion pipe 61; Injection nozzle 7; Heat-conducting sheet 81; First J-type thermocouple 82; Temperature-conducting sleeve 9; Fixing part 91; Extrusion pawl 911; Guide surface 911a; Spacing 911b; Guide channel 912; Temperature-conducting part 92; Coupling surface 921; Positioning opening 922; Guide protrusion 923; Guide section heating coil 10; Diversion section heating coil 11; First positioning groove 12; Sub-diversion heating coil 13; Spring 14. Detailed Implementation

[0031] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] like Figures 1 to 12 As shown, this invention discloses a nozzle temperature-sensing mold, comprising an upper plate 1, a middle plate 2, and a lower plate 3 stacked sequentially from top to bottom, which are fixedly connected as a whole by bolts. An interface 101 is provided on the outer side of the upper plate 1, which is used to connect with the discharge port of an injection molding machine, allowing molten plastic to enter the mold from the injection molding machine. A first positioning groove 12 is formed between the inner side of the upper plate 1 and the outer side of the middle plate 2. A main flow divider plate 4 is installed in the first positioning groove 12, the contour of which is adapted to the first positioning groove 12. Precise installation and positioning are achieved by embedding the main flow divider plate 4 into the first positioning groove 12.

[0034] The main flow divider 4 is connected to the interface 101. After the molten plastic enters from the interface 101, it first flows into the main flow divider 4. The main flow divider 4 includes a guide section 41 located in the middle region and flow dividers 42 connected to both ends of the guide section 41 along its length. The guide section 41 is provided with a main pipe 411 inside, and the middle section of the main pipe 411 is connected to the interface 101. The flow dividers 42 are provided with intersecting and interconnected main flow dividers 421 inside. The end of the main pipe 411 is connected to the main flow divider 421, and the end of the main flow divider 421 is connected to a flow divider nozzle 5. Thus, the molten plastic is diverted through the main pipe 411 to the flow dividers 42 at both ends, and then distributed to each flow divider nozzle 5 through the main flow divider 421.

[0035] In this embodiment, a clearance port 21 is provided on the middle layer plate 2 for the flow-dividing nozzle 5 to pass through. The number and position of the clearance port 21 correspond to the flow-dividing nozzle 5. The flow-dividing nozzle 5 extends into the second positioning groove 32 provided on the lower layer plate 3 through the clearance port 21. A secondary flow-dividing plate 6 is installed in the second positioning groove 32, and a plurality of injection nozzles 7 are provided on the secondary flow-dividing plate 6. An installation port 31 is provided on the lower layer plate 3 for the injection nozzles 7 to extend out. It should be noted that, for ease of drawing, Figure 1 Only one injection nozzle 7 is installed at the mounting port 31. The middle layer plate 2 has a transition port 24 opposite to the mounting port 31 on the side facing the lower layer plate 3. A water pipe 22 is installed on one side of the middle layer plate 2. The middle layer plate 2 also has a grid-like cooling water channel 23. The cooling water channel 23 fully covers the area around the transition port 24 and is connected to the water pipe 22. External cooling water enters the cooling water channel 23 through the water pipe 22 and circulates to cool the middle layer plate 2. This helps to dissipate heat for the injection nozzle 7 that extends to the transition port 24, preventing the injection nozzle 7 area from being affected by excessive temperature and thus affecting the flow performance of the plastic. In conjunction with the second temperature measuring module described below, the temperature of each injection nozzle 7 is controlled more accurately and quickly at a suitable temperature to ensure injection molding quality.

[0036] Furthermore, the contour of the secondary flow divider plate 6 is adapted to the second positioning groove 32. The secondary flow divider plate 6 is precisely installed and positioned by embedding it into the second positioning groove 32. The secondary flow divider plate 6 is connected to the flow divider nozzle 5. Specifically, it has secondary flow divider pipes 61 that are intersecting and interconnected. The secondary flow divider pipe 61 has a connecting section opposite to the relief port 21. In this way, the molten plastic flowing out of the flow divider nozzle 5 enters the secondary flow divider pipe 61 through the connecting section and is further distributed and transported to multiple injection nozzles 7 installed at the end of the secondary flow divider pipe 61. The bottom end of the injection nozzle 7 extends out of the outer side of the lower plate 3 from the mounting port 31 opened on the lower plate 3 for injecting molten plastic into the mold cavity. In this way, multiple workpieces can be injection molded, improving processing efficiency.

[0037] In this embodiment, to ensure that the molten plastic maintains a suitable temperature within the flow channel to prevent cooling, solidification, and blockage, heating coils 10 for the guide section 41 and heating coils 11 for the branch section 42 are respectively provided on both sides of the guide section 41 and the branch section 42 for heating the main pipe 411 and the main branch pipe 421. Furthermore, a branch heating coil 13 is provided on the branch plate 6, arranged along its contour, to heat the branch pipe 61, ensuring that the molten plastic flowing into the branch pipe 61 maintains a suitable temperature within the flow channel to prevent cooling, solidification, and blockage. Meanwhile, the main flow divider plate 4 and the secondary flow divider plate 6 are also equipped with a first temperature measuring module. The first temperature measuring module includes a heat-conducting sheet 81 and a first J-type thermocouple 82. The surfaces of the main flow divider plate 4 and the secondary flow divider plate 6 are provided with grooves for embedding the heat-conducting sheet 81. The heat-conducting sheet 81 is respectively set at the corresponding positions of the flow guiding section heating coil 10, the flow dividing section heating coil 11 and the secondary flow dividing section heating coil 13, and is used to conduct the temperature of the heating coil to the first J-type thermocouple 82. One end of the first J-type thermocouple 82 is connected to the heat-conducting sheet 81 and the other end is connected to an external temperature controller, so that the heating temperature of the flow guiding section heating coil 10, the flow dividing section heating coil 11 and the secondary flow dividing section heating coil 13 can be detected respectively, realizing independent temperature monitoring of different areas of the main flow divider plate 4 and the secondary flow divider plate 6.

[0038] A second temperature measuring module is provided on the outer periphery of each injection nozzle 7. The second temperature measuring module includes a second J-type thermocouple and a temperature-conducting sleeve 9 fitted around the outer periphery of the injection nozzle 7. The temperature-conducting sleeve 9 is used to conduct the temperature of the injection nozzle 7 to the second J-type thermocouple. One end of the second J-type thermocouple is connected to the temperature-conducting sleeve 9, and the other end is connected to an external temperature controller. During operation, the injection nozzle 7 transfers high temperature to the tightly fitted temperature-conducting sleeve 9. The second J-type thermocouple forms a closed circuit by relying on two different metal bodies. When there is a temperature difference between the two ends, a stable thermoelectric potential is generated through the Seebeck effect, and the data is transmitted to the external temperature controller, thereby realizing the real-time detection of the temperature of each injection nozzle 7. The detection principle of the first temperature measuring module is the same as that of the second temperature measuring module, so it will not be described in detail. The nozzle temperature is then monitored in real time through the first and second temperature measuring modules.

[0039] In this embodiment, the temperature-conducting sleeve 9 includes a fixing part 91 and a temperature-conducting part 92. The fixing part 91 is fitted and fixed to the outer periphery of the injection nozzle 7 with an interference fit. The fixing part 91 has a plurality of circumferentially evenly distributed extrusion pawls 911 on one side facing the nozzle head direction. The inner end of each extrusion pawl 911 has a guide surface 911a that gradually offsets towards the axis along the nozzle head direction. The temperature-conducting part 92 has a coupling surface 921 adapted to the guide surface 911a on one side facing the fixing part 91. When the heat-conducting part 92 is pushed towards the fixing part 91, the coupling surface 921 gradually contacts the guide surface 911a. The guide surface 911a generates a radial force on the coupling surface 921, so that while the heat-conducting part 92 is being pushed in, the extrusion pawl 911 can also exert radial pressure on the heat-conducting part 92, ensuring that the inner wall of the heat-conducting part 92 is fully fitted with the outer periphery of the injection nozzle 7, thus ensuring the reliability of heat conduction. Therefore, through the above structure, the heat-conducting sleeve 9 can fit tightly against the outer periphery of the injection nozzle 7, ensuring the accuracy and reliability of temperature conduction. At the same time, the fitted structure of the heat-conducting sleeve 9 is easy to install and disassemble, which is beneficial for daily maintenance and replacement.

[0040] In addition, a mounting groove surrounding the injection nozzle 7 is provided on the fixing part 91, and a spring 14 is embedded in the mounting groove. A through guide channel 912 along the spiral direction is provided on the outer periphery of the fixing part 91. A gap 911b is provided between adjacent extrusion pawls 911. One side of the guide channel 912 extends to a certain gap 911b and communicates with it. The outer wall of the temperature-conducting part 92 is provided with a guide protrusion 923. During installation, the guide protrusion 923 first enters the guide channel 912 through the corresponding spacing 911b and couples with the guide channel 912. Then, the temperature-conducting part 92 is rotated to make the guide protrusion 923 slide along the spiral path of the guide channel 912. During this process, the temperature-conducting part 92 moves axially and squeezes the spring 14. The elastic force generated by the spring 14 makes the guide protrusion 923 tightly abut against the inner wall of the guide channel 912, thereby axially positioning the temperature-conducting part 92 and keeping it in a stable fitted state on the outer periphery of the injection nozzle 7. Furthermore, the spiral direction of the guide channel 912 can prevent the temperature-conducting part 92 from falling out of the fixing part 91 under axial force alone, thereby further improving the stability of the temperature-conducting part 92 during installation. Since the compression pawl 911 extends axially to ensure that the spacing 911b extends axially, when the temperature-conducting part 92 is connected to the fixing part 91, the positioning port 922 opened on the temperature-conducting part 92 can be opposite to the spacing 911b. Since the compression pawl 911 extends axially, it can fully cover the temperature-conducting part 92 to make the radial compression of the temperature-conducting part 92 more sufficient and uniform, while avoiding the positioning port 922 being covered by the fixing part 91. This improves the convenience of connecting the second J-type thermocouple to the temperature-conducting part 92. That is, after one end of the second J-type thermocouple is inserted into the positioning port 922, it can be fixed by welding to achieve the connection between the second J-type thermocouple and the temperature-conducting part 92.

[0041] Additionally, it should be noted that in the above embodiments, both the first J-type thermocouple 82 and the second J-type thermocouple can be commercially available J-type thermocouple products, and their specific models and specifications can be selected according to the actual temperature measurement range and accuracy requirements. The flow guiding section heating coil 10 and the flow splitting section heating coil 11 can be made of resistance heating wire, and their heating power can be set according to the size of the main flow splitting plate 4 and the process temperature requirements of the molten plastic. The cross-sectional density of the cooling water channels 23 and the cooling water flow rate can be adjusted according to the cooling requirements of the mold.

[0042] In this embodiment, an upper plate wiring groove 102 communicating with the first positioning groove 12 is provided on the upper plate 1, and a lower plate wiring groove 33 communicating with the second positioning groove 32 is provided on the lower plate 3. The upper plate wiring groove 102 and the lower plate wiring groove 33 can accommodate the signal lines of the first J-type thermocouple 82 and the second J-type thermocouple, as well as the power lines of each heating coil, ensuring that the cables inside the mold are arranged neatly and orderly, and avoiding messy cables from interfering with the normal operation of the mold. The heating temperature of the guide section 41 and the diversion section 42 is independently detected by the first temperature measuring module on the main diversion plate 4, and the temperature of the nozzle tip is detected one by one by the second temperature measuring module on the outer periphery of each injection nozzle 7. The entire mold realizes multi-level real-time temperature monitoring from the main diversion plate 4 to the injection nozzle 7, which can effectively ensure the temperature uniformity and stability of the molten plastic in the entire flow channel system, thereby improving the quality of the injection molded product.

[0043] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A nozzle temperature-sensing mold, characterized in that, The system includes an upper plate, a middle plate, and a lower plate. The outer side of the upper plate has an interface for connecting to the injection molding machine base. A main flow divider plate communicating with the interface is located between the inner side of the upper plate and the outer side of the middle plate. Flow divider nozzles are located at the corners of the main flow divider plate. The middle plate has clearance openings for the flow divider nozzles to pass through. The lower plate has a secondary flow divider plate communicating with the flow divider nozzles. The main flow divider plate and the secondary flow divider plate are each equipped with a first temperature measuring module. The secondary flow divider plate has multiple injection nozzles. The lower plate has mounting openings for the injection nozzles to extend out. A second temperature measuring module is located on the outer periphery of each injection nozzle. The nozzle temperature is monitored in real time through the first and second temperature measuring modules in a multi-level manner.

2. The nozzle temperature sensing mold according to claim 1, characterized in that, The main flow divider includes a flow guide section and flow dividers disposed at both ends of the flow guide section. Heating coils for the flow guide section and heating coils for the flow dividers are respectively disposed on both sides of the flow guide section and both sides of the flow dividers. The first temperature measuring module is disposed on the heating coils for the flow guide section and the heating coils for the flow dividers, respectively, to detect the heating temperature of the heating coils for the flow guide section and the heating coils for the flow dividers. The first temperature measuring module includes a heat-conducting sheet and a first J-type thermocouple. One end of the first J-type thermocouple is connected to the heat-conducting sheet, and the other end is connected to an external temperature controller. The main flow divider and the secondary flow divider are respectively provided with slots for embedding the heat-conducting sheet.

3. The nozzle temperature sensing mold according to claim 2, characterized in that, The second temperature measuring module includes a second J-type thermocouple and a temperature-conducting sleeve fitted around the injection nozzle. One end of the second J-type thermocouple is connected to the temperature-conducting sleeve, and the other end is connected to an external temperature controller.

4. A nozzle temperature sensing mold according to claim 3, characterized in that, The temperature-conducting sleeve includes a fixing part and a temperature-conducting part. The fixing part is fitted and fixed to the outer periphery of the injection nozzle. One end of the fixing part is provided with a compression pawl. There are multiple compression pawls and they are evenly distributed around the circumference. The inner end of the compression pawl is provided with a guide surface that gradually shifts towards the axis along the nozzle head direction. One end of the temperature-conducting part is provided with a coupling surface that matches the guide surface. By pushing the temperature-conducting part, the coupling surface gradually contacts the guide surface, thereby driving the compression pawl to radially compress the temperature-conducting part, so that the temperature-conducting part is fully fitted to the outer periphery of the injection nozzle. The outer periphery of the temperature-conducting part is provided with a positioning port, and one end of the second J-type thermocouple is inserted into the positioning port for fixation.

5. A nozzle temperature-sensing mold according to claim 1, characterized in that, A water pipe is provided on one side of the middle layer plate, and a cooling water channel with crisscrossing arrangement is provided inside the middle layer plate. The cooling water channel is connected to the water pipe.

6. A nozzle temperature sensing mold according to claim 2, characterized in that, The flow guide section is provided with a main flow pipe, and the flow distribution section is provided with main and branch flow pipes that are intersected and interconnected. The end of the main flow pipe is connected to the main branch flow pipe, and the end of the main branch flow pipe is connected to the branch flow nozzle. The secondary flow distribution plate is provided with secondary branch flow pipes that are intersected and interconnected. The secondary branch flow pipes are connected to the branch flow nozzle, and the injection nozzle is installed at the end of the secondary branch flow pipe.

7. A nozzle temperature-sensing mold according to claim 2, characterized in that, A first positioning groove adapted to the outline of the main diverter plate is provided between the inner side of the upper plate and the outer side of the middle plate. A second positioning groove adapted to the outline of the secondary diverter plate is provided on the lower plate. An upper plate wiring groove communicating with the first positioning groove is provided on the upper plate. The upper plate wiring groove communicating with the first positioning groove is used to store cables. A lower plate wiring groove communicating with the second positioning groove is provided on the outer side of the lower plate. The lower plate wiring groove is used to store cables.

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