An injection mold facilitating temperature control of the injection mold

Abstract

The application relates to an injection mold facilitating temperature control of the injection mold, and belongs to the technical field of injection molds, which comprises a machining table, an installation box, an upper mold and a lower mold are arranged on the machining table, the upper mold and the lower mold are arranged in a stacking mode and a mold core is arranged between the upper mold and the lower mold, an air outlet pipe is arranged on the surface of the installation box opposite to the mold core, an extension pipe is coaxially arranged on the air outlet pipe, the extension pipe is a telescopic structure, the telescopic direction of the extension pipe is parallel to the air outlet direction of the air outlet pipe, an arc-shaped groove is arranged at the end of the extension pipe away from the air outlet pipe, the extension pipe is clamped on the peripheral wall of the upper mold and the lower mold through the arc-shaped groove, a plurality of air outlets are arranged in the side wall of the extension pipe, and a first driving element for driving the extension pipe to slide against the upper mold and the lower mold is arranged on the installation box. The application has the advantage of improving the temperature control effect of the upper and lower molds.

Description

Technical Field

[0001] This application relates to the field of injection mold technology, and in particular to an injection mold that facilitates temperature control. Background Technology

[0002] Injection molds are tools used to produce plastic products; they are also tools that give plastic products their complete structure and precise dimensions. Injection molding is a processing method used for the mass production of certain complex-shaped parts. Specifically, it refers to injecting molten plastic into a mold cavity under high pressure using an injection molding machine, and after cooling and solidification, obtaining the molded product. During injection molding, the mold core inside the mold needs to be monitored stably. The temperature of the mold core near the upper and lower mold sides can be uneven. If multiple areas of uneven temperature or even excessive temperature differences occur within the mold core, it can directly cause significant quality problems in the injection-molded product.

[0003] Currently, patent document CN209158802U discloses an injection mold that facilitates temperature control. The mold includes a mounting box, a fan, resistance wires, a rotating motor, a connecting shaft, a turntable, a controller, a high-temperature sensor, and a low-temperature sensor. The mounting box is symmetrically mounted on the left and right sides of the upper surface of the processing table. A fan is installed inside the mounting box, and resistance wires are mounted on both sides of the fan. The rotating motor is mounted on the lower surface of the processing table, and a connecting shaft is connected to the upper surface of the rotating motor. A turntable is connected to the upper surface of the connecting shaft. The controller is mounted on the lower surface of the processing table. The high-temperature sensor is mounted on the upper side inside the mold core, and a low-temperature sensor is mounted on the lower side inside the mold core. This design solves the problem of insufficient temperature control detection in injection molds. This utility model has a reasonable structure, facilitates real-time temperature detection, improves product injection quality, and has high reliability.

[0004] Regarding the aforementioned technologies, the inventors believe that the following defects exist: when the air outlet duct is working, the air impacts the upper and lower molds, and the air flows in a direction away from the upper and lower molds. The contact time between the air and the upper and lower molds is relatively short, resulting in a relatively poor effect on the temperature regulation of the upper and lower molds. Summary of the Invention

[0005] To improve the temperature control effect of the upper and lower molds, this application provides an injection mold that facilitates temperature control of the injection mold.

[0006] The technical solution for an injection mold that facilitates temperature control in this application is as follows: An injection mold for easy temperature control includes a processing table. The processing table is equipped with a mounting box, an upper mold, and a lower mold. The upper and lower molds are stacked vertically with a mold core between them. An air outlet pipe is provided on the surface of the mounting box facing the mold core. An extension pipe is coaxially mounted on the air outlet pipe. The extension pipe is telescopic, and its extension direction is parallel to the air outlet direction of the air outlet pipe. An arc-shaped groove is formed at the end of the extension pipe facing away from the air outlet pipe. The extension pipe is engaged with the peripheral walls of the upper and lower molds through the arc-shaped groove. Multiple air outlets are formed on the side wall of the extension pipe. The mounting box is equipped with a first driving component for driving the extension pipe to slide against the upper and lower molds.

[0007] By adopting the above technical solution, when controlling the temperature of the mold core, the first driving component drives the extension tube to extend, and the end of the extension tube is engaged with the peripheral walls of the upper and lower molds through the arc groove. Subsequently, the fan, heating wire, etc. in the installation box work to adjust the temperature of the mold core. In the above process, the air generated by the fan impacts the side walls of the upper and lower molds, which has a temperature-regulating effect on the upper and lower molds. Under the action of the extension tube, the number of times the air generated by the fan impacts the upper and lower molds is increased, which improves the temperature regulation effect of the fan and other components on the upper and lower molds. At the same time, the air after multiple temperature adjustments is discharged through the air outlet, which facilitates the subsequent airflow to cool the upper and lower molds. Under the action of the arc groove, the contact area between the air and the upper and lower molds is maximized, further improving the temperature regulation effect of the upper and lower molds.

[0008] Optionally, the first driving component includes a lead screw rotatably mounted on the mounting box, the length direction of the lead screw being parallel to the extension direction of the extension tube, and the sleeve of the extension tube opposite to the air outlet pipe being threaded onto the lead screw; the first driving component also includes a fan mounted inside the mounting box, a connecting shaft being coaxially mounted on the output shaft of the fan, the length direction of the connecting shaft being parallel to the length direction of the lead screw, and a conveyor belt being disposed between the connecting shaft and the lead screw.

[0009] By adopting the above technical solution, after the fan is started, the fan drives the connecting shaft to rotate, the rotating connecting shaft drives the conveyor belt to run, the running conveyor belt drives the lead screw to rotate, and the rotating lead screw drives the end of the extension tube to slide towards the upper and lower molds and lock onto the side walls of the upper and lower molds. The operation is simple and convenient.

[0010] Optionally, the lead screw includes a threaded section and straight rod sections coaxially disposed at both ends of the threaded section. The sleeve of the extension tube away from the air outlet pipe is threadedly connected to the threaded section. The straight rod section is rotatably disposed on the mounting box. The threaded section is an external thread. After the sleeve of the extension tube away from the air outlet pipe slides to separate from the threaded section and slides to the straight rod section, the sleeve at the end of the extension tube is engaged with the peripheral walls of the upper mold and the lower mold.

[0011] By adopting the above technical solution, when the end of the extension tube is clamped onto the side wall of the upper and lower molds, the sleeve of the extension tube separates from the threaded section and runs onto the straight rod. At this time, the influence of the sleeve on the rotation of the screw is eliminated, which facilitates the rotation of the fan blades for temperature regulation.

[0012] Optionally, the lead screw includes a threaded section and straight rod sections coaxially disposed at both ends of the threaded section. The sleeve of the extension tube away from the air outlet pipe is threadedly connected to the threaded section. The straight rod section is rotatably disposed on the mounting box. The threaded section is an external thread. After the sleeve of the extension tube away from the air outlet pipe slides to separate from the threaded section and slides to the straight rod section, the sleeve at the end of the extension tube is engaged with the peripheral walls of the upper mold and the lower mold.

[0013] By adopting the above technical solution, during the extension of the tube, the spring is driven to extend, causing the end of the extension tube to tend to move towards the air outlet. When mold opening is required, the fan is started to reverse, which drives the lead screw to rotate in the opposite direction. Under the action of the spring force, the sleeve at the end of the extension tube is pulled to contact the threaded section, thus facilitating the threaded connection between the extension tube and the threaded section, and making it easier to retract the extension tube to the initial position. At the same time, when the fan rotates in the opposite direction, the air inside the extension tube is extracted and discharged, reducing the impact of high-temperature gas on the workers and improving safety.

[0014] Optionally, the diameter of the sleeve gradually increases along the air outlet direction of the air outlet duct.

[0015] By adopting the above technical solution, the diameter of the sleeve gradually increases, which makes it easier for the upper and lower molds to be fitted into the sleeve at the end to the maximum extent, thereby improving the temperature regulation effect of the upper and lower molds.

[0016] Optionally, the inner wall of the sleeve is hinged with multiple return plates, the hinge axis of the return plates being perpendicular to the axial direction of the sleeve. The injection mold also includes a fixing component, which is used to fix the return plates to an inclined position when the return plates are rotated to face the upper and lower molds.

[0017] By adopting the above technical solution, after the extension tube abuts against the upper and lower molds, the return plate rotates to an inclined position, forming a triangular space with the inner wall of the sleeve. The air impacting the upper and lower molds enters the triangular space, which facilitates the air to pass through the triangular space and then impact the side walls of the upper and lower molds, further improving the temperature regulation effect of the upper and lower molds. At the same time, the flowing air repeatedly impacts the upper and lower molds, reducing the power consumption of the fan and reducing the operating cost.

[0018] Optionally, the inner wall of the sleeve is rotatably provided with multiple hinge shafts, each of which corresponds to a return plate. The return plate is fixedly mounted on the hinge shaft. The fixing component includes a torsion spring sleeved on the hinge shaft and a receiving block disposed on the inner wall of the sleeve. The receiving block is located on the side of the return plate near the air outlet pipe. The torsion spring drives the return plate to rotate toward the receiving block and receive it on the receiving block.

[0019] By adopting the above technical solution, after the extension tube is extended, the hinge shaft is driven to rotate under the action of the torsion spring, causing the return plate to rotate toward the receiving block, so that the return plate is in an inclined state, which is simple and convenient to operate.

[0020] Optionally, the inner wall of the sleeve is provided with multiple receiving slots for receiving the return plate, and the receiving block is located in the receiving slot.

[0021] By adopting the above technical solution, when the extension tube retracts to the initial position, the adjacent sleeve abuts against the impact surface of the guide plate, causing the guide plate to rotate toward the receiving groove and be stored in the receiving groove, thereby facilitating the retraction of the extension tube to the initial position.

[0022] Optionally, the return plates are evenly arranged along the circumference of the sleeve.

[0023] By adopting the above technical solution, the reflux plates are evenly arranged circumferentially, which improves the air blocking effect of the reflux plates, thereby facilitating the temperature adjustment of the upper and lower molds.

[0024] Optionally, the sleeve is provided with a hook for attaching to an adjacent sleeve with a smaller diameter. The sleeve has a groove for the end of the hook to slide and engage with the groove. The groove is closed at both ends and the length direction of the groove is parallel to the length direction of the sleeve.

[0025] By adopting the above technical solution, the possibility of adjacent sleeves falling off is reduced under the action of the hook, thereby extending the air temperature regulation operation of the mold inside the tube.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. When controlling the temperature of the mold core, the first driving component drives the extension tube to extend, and the end of the extension tube is engaged with the peripheral walls of the upper and lower molds through the arc groove. Then, the fan, heating wire, etc. in the installation box work to adjust the temperature of the mold core. In the above process, the air generated by the fan impacts the side walls of the upper and lower molds, which has a temperature-regulating effect on the upper and lower molds. Under the action of the extension tube, the number of times the air generated by the fan impacts the upper and lower molds is increased, which improves the temperature regulation effect of the fan and other components on the upper and lower molds. At the same time, the air after multiple temperature adjustments is discharged through the air outlet, which facilitates the subsequent airflow to cool the upper and lower molds. 2. The arc-shaped groove maximizes the contact area between the air and the upper and lower molds, further improving the temperature regulation effect of the upper and lower molds. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an injection mold according to an embodiment of this application, which facilitates temperature control of the injection mold. Figure 2 This is a cross-sectional view of an injection mold according to an embodiment of this application, which facilitates temperature control of the injection mold. Figure 3 This is a partial schematic diagram of an injection mold according to an embodiment of this application, which facilitates temperature control of the injection mold. Figure 4 yes Figure 3 An enlarged schematic diagram of part A in the middle; Figure 5 yes Figure 2 Enlarged schematic diagram of part B.

[0028] Explanation of reference numerals in the attached diagram: 1. Processing table; 2. Mounting box; 3. Upper mold; 4. Lower mold; 5. Air outlet duct; 6. Fan; 7. Extension tube; 71. Sleeve; 8. Arc-shaped groove; 9. Air outlet; 10. First driving component; 11. Lead screw; 111. Threaded section; 112. Straight rod section; 12. Connecting shaft; 13. Conveyor belt; 14. Mounting plate; 15. Spring; 16. Return plate; 17. Hinge shaft; 18. Torsion spring; 19. Receiving block; 20. Storage slot; 21. Hook; 22. Slide. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0030] This application discloses an injection mold that facilitates temperature control of the injection mold. (Refer to...) Figure 1 and Figure 2 The injection mold for easy temperature control includes a processing table 1. The processing table 1 is provided with an installation box 2, an upper mold 3 and a lower mold 4. The upper mold 3 and the lower mold 4 are stacked one on top of the other. A mold core is provided between the upper mold 3 and the lower mold 4. An air outlet pipe 5 is provided on the surface of the installation box 2 facing the mold core. The air outlet pipe 5 is positioned directly opposite the upper mold 3 and the lower mold 4. A fan 6 and a heating wire are provided inside the installation box 2. The fan 6 is located on the surface of the installation box 2 facing the air outlet pipe 5. The heating wire spans the air inlet of the air outlet pipe 5. Reference Figure 2 and Figure 3In this embodiment, an extension tube 7 is coaxially arranged on the air outlet duct 5. The extension tube 7 is a telescopic structure, and the telescopic direction of the extension tube 7 is parallel to the air outlet direction of the air outlet duct 5. An arc-shaped groove 8 is opened at the end of the extension tube 7 away from the air outlet duct 5. The extension tube 7 is clamped to the peripheral wall of the upper mold 3 and the lower mold 4 through the arc-shaped groove 8. Multiple air outlets 9 are opened on the side wall of the extension tube 7, and the air outlets 9 are evenly arranged on the peripheral wall of the extension tube 7. When the fan 6 and heating wire in the mounting box are working, the extension tube 7 is extended and abuts against the side wall of the upper mold 3 and the lower mold 4 and fits against each other. Under the action of the extension tube 7, the air generated by the fan 6 is confined in the extension tube 7, and some gas is discharged through the air outlet 9. In this state, the temperature control effect of cold or hot air on the upper mold 3 and the lower mold 4 is improved.

[0031] Reference Figure 2 and Figure 3 To facilitate the fitting of the end of the extension tube 7 to the sidewalls of the upper mold 3 and the lower mold 4, the mounting box 2 is provided with a first driving member 10 for driving the extension tube 7 to slide to abut against the upper mold 3 and the lower mold 4. The first driving member 10 includes a lead screw 11 rotatably mounted on the mounting box 2, with both ends of the lead screw 11 extending out of the mounting box 2. The length direction of the lead screw 11 is parallel to the extension direction of the extension tube 7. The sleeve 71 of the extension tube 7, which is away from the air outlet pipe 5, is threadedly connected to the lead screw 11. The first driving member 10 also includes a fan 6 mounted inside the mounting box 2. A connecting shaft 12 is coaxially mounted on the output shaft of the fan 6. The length direction of the connecting shaft 12 is parallel to the length direction of the lead screw 11. A conveyor belt 13 is provided between the connecting shaft 12 and the lead screw 11. When the fan 6 is working, the fan blades of the fan 6 drive the connecting shaft 12 to rotate. The rotation of the connecting shaft 12 drives the conveyor belt 13 to run. The running of the conveyor belt 13 drives the lead screw 11 to rotate. The rotation of the lead screw 11 drives the extension tube 7 to extend to abut against the side walls of the upper mold 3 and the lower mold 4. The operation is simple and convenient.

[0032] Reference Figure 2 and Figure 3To reduce the impact of the lead screw 11 on the rotation of the fan blades 6, the lead screw 11 includes a threaded section 111 and straight rod sections 112 coaxially disposed at both ends of the threaded section 111. The sleeve 71 of the extension tube 7, which is away from the outlet pipe 5, is threadedly connected to the threaded section 111. The straight rod section 112 is rotatably mounted on the mounting box 2. Furthermore, the threaded section 111 is an external thread. After the sleeve 71 of the extension tube 7, which is away from the outlet pipe 5, slides to separate from the threaded section 111 and slides to the straight rod section 112, the sleeve 71 at the end of the extension tube 7 is snapped onto the upper... Furthermore, on the peripheral walls of mold 3 and lower mold 4, a mounting plate 14 is fixedly installed on the sleeve 71 located away from the air outlet pipe 5. The mounting plate 14 is threadedly connected to the threaded section 111. When the extension pipe 7 abuts against the side wall of upper mold 3 and lower mold 4, the mounting plate 14 is located at the separation point between the threaded section 111 and the straight rod section 112, and is located on the straight rod section 112. The rotation of the fan blades of fan 6 drives the lead screw 11 to rotate, and the straight rod section 112 rotates in the threaded hole on the mounting plate 14, reducing the influence of the lead screw 11 on the fan blades of fan 6.

[0033] Reference Figure 2 and Figure 3 To facilitate the restoration of the threaded engagement between the mounting plate 14 and the threaded section 111, the extension tube 7 includes multiple sleeves 71 that slide together. The air outlet 9 is located on the sleeve 71. A spring 15 is provided between the mounting box 2 and the mounting plate 14. One end of the spring 15 is fixedly mounted on the mounting box 2, and the other end is fixedly mounted on the mounting plate 14. The spring 15 is used to pull the mounting plate 14 to abut against the end of the threaded section 111. Under the action of the spring force of the spring 15, the threaded hole of the mounting plate 14 has a tendency to move towards the threaded section 111, thereby facilitating the threaded engagement between the mounting plate 14 and the threaded section 111.

[0034] Reference Figure 2 and Figure 3 In this embodiment of the application, the diameter of the sleeve 71 gradually increases along the air outlet direction of the air outlet duct 5.

[0035] Reference Figure 3 and Figure 4 To improve the effect of the blower 6 on the upper mold 3 and the lower mold 4, multiple return plates 16 are hinged to the inner wall of the sleeve 71. The return plates 16 are evenly arranged along the circumference of the sleeve 71, and the hinge axis 17 of the return plate 16 is perpendicular to the axis of the sleeve 71. Furthermore, multiple hinge axes 17 are rotatably provided on the inner wall of the sleeve 71, and the hinge axes 17 correspond one-to-one with the return plates 16, and the return plates 16 are fixedly mounted on the hinge axes 17. When the blower 6 is working, the return plates 16 are in an inclined state, so that the air flowing back towards the blower 6 impacts the return plates 16 and flows back towards the upper mold 3 and the lower mold 4, thereby improving the effect on the upper mold 3 and the lower mold 4.

[0036] Reference Figure 3 and Figure 4 The injection mold also includes a fixing component, which is used to fix the return plate 16 to an inclined position when it rotates to face the upper mold 3 and the lower mold 4. The fixing component includes a torsion spring 18 sleeved on the hinge shaft 17 and a receiving block 19 disposed on the inner wall of the sleeve 71. The receiving block 19 is located on the side of the return plate 16 near the air outlet 5. The torsion spring 18 drives the return plate 16 to rotate toward the receiving block 19 and receive it on the receiving block 19. One side of the torsion spring 18 is fixedly disposed on the hinge shaft 17, and the other side is fixedly disposed on the inner wall of the sleeve 71. The torsion spring 18 drives the return plate 16 to rotate toward the receiving block 19 and receive it on the receiving block 19. The return plate 16 is fixed in the above state so that air can return toward the upper mold 3 and the lower mold 4.

[0037] Reference Figure 3 and Figure 4 To reduce the impact of the return plate 16 on the retraction of the extension tube 7, the inner wall of the sleeve 71 is provided with multiple receiving grooves 20 for receiving the return plate 16. The receiving block 19 is located in the receiving groove 20, and the depth of the receiving groove 20 is greater than the thickness of the return plate 16.

[0038] Reference Figure 3 and Figure 5 To reduce the possibility of adjacent sleeves 71 falling off, a hook 21 for hooking adjacent smaller diameter sleeves 71 is fixedly provided on the sleeve 71. The hook 21 is L-shaped, and the sleeve 71 has a groove 22 for the end of the hook 21 to slide and engage with the groove. The groove 22 is closed at both ends, and the length direction of the groove 22 is parallel to the length direction of the sleeve 71. Under the action of the hook 21, the sliding range of the sleeve 71 is limited, reducing the possibility of adjacent sleeves 71 falling off.

[0039] The implementation principle of an injection mold that facilitates temperature control in this application embodiment is as follows: When adjusting the temperature of the upper mold 3 and the lower mold 4, the fan 6 is started. The fan blades of the fan 6 drive the connecting shaft 12 to rotate. The rotation of the connecting shaft 12 drives the conveyor belt 13 to run. The running of the conveyor belt 13 drives the lead screw 11 to rotate. The rotation of the lead screw 11 drives the extension tube 7 to extend to abut against the side wall of the upper mold 3 and the lower mold 4. Meanwhile, after the adjacent sleeves 71 separate, under the action of the torsion spring 18, the return plate 16 rotates and is supported on the receiving block 19; the reciprocating impact of the air generated by the fan 6 on the upper mold 3 and the lower mold 4 improves the temperature regulation effect on the upper mold 3 and the lower mold 4.

[0040] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An injection mold for easy temperature control of an injection mold, comprising a processing table (1), wherein a mounting box (2), an upper mold (3), and a lower mold (4) are provided on the processing table (1), the upper mold (3) and the lower mold (4) are stacked vertically and a mold core is provided between them, and an air outlet pipe (5) is provided on the surface of the mounting box (2) facing the mold core, characterized in that: An extension tube (7) is coaxially arranged on the air outlet pipe (5). The extension tube (7) is a telescopic structure. The telescopic direction of the extension tube (7) is parallel to the air outlet direction of the air outlet pipe (5). An arc groove (8) is opened at one end of the extension tube (7) away from the air outlet pipe (5). The extension tube (7) is clamped to the peripheral wall of the upper mold (3) and the lower mold (4) through the arc groove (8). Multiple air outlets (9) are opened on the side wall of the extension tube (7). A first driving member (10) is provided on the mounting box (2) for driving the extension tube (7) to slide to abut against the upper mold (3) and the lower mold (4). The first driving component (10) includes a lead screw (11) rotatably mounted on the mounting box (2), the length direction of the lead screw (11) being parallel to the extension direction of the extension tube (7), and the sleeve (71) of the extension tube (7) being threadedly connected to the lead screw (11) away from the air outlet pipe (5); the first driving component (10) also includes a fan (6) mounted inside the mounting box (2), a connecting shaft (12) being coaxially mounted on the output shaft of the fan (6), the length direction of the connecting shaft (12) being parallel to the length direction of the lead screw (11), and a conveyor belt (13) being provided between the connecting shaft (12) and the lead screw (11); The lead screw (11) includes a threaded section (111) and a straight rod section (112) coaxially disposed at both ends of the threaded section (111). The sleeve (71) of the extension tube (7) away from the air outlet pipe (5) is threadedly connected to the threaded section (111). The straight rod section (112) is rotatably disposed on the mounting box (2). The threaded section (111) is an external thread. After the sleeve (71) of the extension tube (7) away from the air outlet pipe (5) slides to separate from the threaded section (111) and slides to the straight rod section (112), the sleeve (71) at the end of the extension tube (7) is snapped onto the peripheral wall of the upper mold (3) and the lower mold (4). The extension tube (7) includes multiple sleeves (71) that slide together. The air outlet (9) is opened on the sleeve (71). A mounting plate (14) is fixedly installed on the sleeve (71) that is away from the air outlet tube (5). The mounting plate (14) is threadedly connected to the threaded section (111). A spring (15) is provided between the mounting box (2) and the mounting plate (14). The spring (15) is used to pull the mounting plate (14) and the end of the threaded section (111) to abut against each other.

2. The injection mold according to claim 1, which facilitates temperature control of the injection mold, is characterized in that: Along the air outlet direction of the air outlet pipe (5), the diameter of the sleeve (71) gradually increases.

3. An injection mold for convenient temperature control of the injection mold according to claim 1, characterized in that: The inner wall of the sleeve (71) is hinged with a plurality of return plates (16), the hinge axis (17) of the return plates (16) being perpendicular to the axis of the sleeve (71). The injection mold also includes a fixing member, which is used to fix the return plates (16) to an inclined position when the return plates (16) rotate to face the upper mold (3) and the lower mold (4).

4. An injection mold for convenient temperature control of the injection mold according to claim 3, characterized in that: The inner wall of the sleeve (71) is rotatably provided with multiple hinge shafts (17), each of which corresponds to a return plate (16). The return plate (16) is fixedly mounted on the hinge shaft (17). The fixing component includes a torsion spring (18) sleeved on the hinge shaft (17) and a receiving block (19) mounted on the inner wall of the sleeve (71). The receiving block (19) is located on the side of the return plate (16) near the air outlet pipe (5). The torsion spring (18) drives the return plate (16) to rotate toward the receiving block (19) and receive it on the receiving block (19).

5. An injection mold for easy temperature control of the injection mold according to claim 4, characterized in that: The inner wall of the sleeve (71) is provided with a plurality of storage slots (20) for storing the return plate (16), and the receiving block (19) is located in the storage slots (20).

6. An injection mold for convenient temperature control of the injection mold according to claim 3, characterized in that: The return plate (16) is evenly arranged along the circumference of the sleeve (71).

7. An injection mold for convenient temperature control of the injection mold according to claim 2, characterized in that: The sleeve (71) is provided with a hook (21) for attaching to an adjacent sleeve (71) with a smaller diameter. The sleeve (71) is provided with a groove (22) for the end of the hook (21) to slide and engage. The groove (22) is closed at both ends and the length direction of the groove (22) is parallel to the length direction of the sleeve (71).

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