Threaded cap injection mold

Abstract

The threaded cover injection mold comprises a movable mold assembly, a fixed mold assembly and a top plate assembly, the fixed mold assembly is arranged on the lower side of the movable mold assembly and provided with a threaded mold core, and the top plate assembly is arranged on the upper side of the movable mold assembly and connected with the movable mold assembly and can drive the movable mold assembly to move up and down, so that mold opening and closing between the movable mold assembly and the fixed mold assembly are achieved; a cavity can be defined when the movable mold assembly and the fixed mold assembly are closed, the top plate assembly is provided with a first transmission part, the fixed mold assembly is provided with a second transmission part capable of moving horizontally, and the top plate assembly can drive the first transmission part to move up and down and drive the second transmission part to move horizontally through the first transmission part. A transmission structure is arranged between the second transmission part and the threaded mold core, and the second transmission part can drive the threaded mold core to rotate and move through the transmission structure, so that the threaded mold core enters or leaves the cavity. The threaded mold core can be correspondingly driven to move through mold opening and closing movement between the movable mold assembly and the fixed mold assembly, the manufacturing cost can be reduced, and the mold structure can be simplified.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, in particular to an injection mold for a threaded cap. Background Art

[0002] In the injection molding production process of threaded caps, demoulding is a key step. Since the cap is designed with threads, in order to achieve demoulding, it is usually necessary to drive the threaded mold core to rotate and move to separate the threaded mold core from the cap, and then use the ejection mechanism to push the cap out of the cavity. In the existing threaded cap injection mold design, a drive device such as a motor or a cylinder is generally installed on the side of the mold to drive the movement of the threaded mold core. However, such a design will not only increase the manufacturing cost of the mold, but also increase the volume of the side of the mold, and it is also necessary to set up additional lines to connect and control the drive device, which brings inconvenience to the production and use of the mold. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a threaded cap injection mold, which can drive the threaded mold core to move out of the mold cavity or enter the mold cavity through the opening and closing movement between the movable mold component and the fixed mold component, without the need for an additional driving device to drive the threaded mold core to move, which is conducive to reducing manufacturing costs and simplifying the mold structure, and is convenient for production and use.

[0004] According to the injection mold of the threaded cover described in the embodiment of the present invention, it includes a movable mold component, a fixed mold component and a top plate component, the fixed mold component is arranged on the lower side of the movable mold component and is provided with a threaded mold core, the top plate component is arranged on the upper side of the movable mold component and is connected to the movable mold component, and can drive the movable mold component to move up and down, so that the movable mold component and the fixed mold component can open or close the mold, and the movable mold component and the fixed mold component can define a cavity when the mold is closed, the top plate component is provided with a first transmission member, and the fixed mold component is provided with a second transmission member that can move horizontally, the top plate assembly can drive the first transmission member to move up and down and drive the second transmission member to move horizontally through the first transmission member, a transmission structure is provided between the second transmission member and the threaded mold core, and the second transmission member can drive the threaded mold core to rotate and move through the transmission structure, so that the threaded mold core enters or leaves the cavity.

[0005] The threaded cover injection mold according to the embodiment of the present invention has at least the following beneficial effects: when in use, the top plate assembly is connected to an external mechanism for driving mold opening and closing. When the mold closing operation is performed, the top plate assembly moves downward and drives the first transmission member and the movable mold assembly to move downward, and the second transmission member is driven to move horizontally by the first transmission member, and the second transmission member drives the threaded mold core to rotate and move upward through the transmission structure, so that when the movable mold assembly and the fixed mold assembly complete the mold closing, the threaded mold core enters the cavity, so that the cover body in the cavity forms a threaded structure during subsequent injection molding; when the mold opening operation is performed, the top plate assembly moves upward and drives the first transmission member and the movable mold assembly to move upward, and the second transmission member is driven to move horizontally and reset by the first transmission member, and the second transmission member is driven to rotate and move downward to leave the cavity through the transmission structure, so that after the movable mold assembly and the fixed mold assembly are opened, the threaded mold core is separated from the cover body in the cavity, so as to facilitate the subsequent demolding of the cover body. By adopting the above structure, the injection mold can utilize the opening and closing movements between the movable mold assembly and the fixed mold assembly to drive the threaded mold core to move out of the cavity or into the cavity, without the need to set up an additional driving device to drive the threaded mold core to move. This is beneficial to reducing manufacturing costs and simplifying the mold structure, making it easier to produce and use.

[0006] According to some embodiments of the present invention, the first transmission member extends downward and has a roller rotatably connected to its lower end, the second transmission member is provided with a first transmission groove, the first transmission groove is inclined and has a groove opening on its upper side for the roller to enter, the roller can move up and down with the first transmission member and push against the groove wall of the first transmission groove to drive the second transmission member to move horizontally.

[0007] According to some embodiments of the present invention, a snap-in recess is provided on the lower side of the first transmission groove, and when the movable mold assembly and the fixed mold assembly are molded together, the roller can be snapped into the snap-in recess.

[0008] According to some embodiments of the present invention, the fixed mold assembly is provided with two first magnetic parts, and the two first magnetic parts are spaced apart and distributed along the movement direction of the second transmission part, and the second transmission part is correspondingly provided with a second magnetic part that can magnetically cooperate with the first magnetic part.

[0009] According to some embodiments of the present invention, the transmission structure includes a gear condition, a first gear part, a second gear part and a rotating shaft part, the gear condition is connected to the second transmission part and moves with the second transmission part, the first gear part and the second gear part are both rotatably connected to the fixed mold assembly, the first gear part is respectively meshed with the gear condition and the second gear part for transmission, the rotating shaft part is connected to the second gear part and rotates with the second gear part, the fixed mold assembly is provided with a transmission channel, the transmission channel is located below the cavity, the threaded mold core part is located in the transmission channel and is threadedly matched with the inner wall of the transmission channel, the threaded mold core is provided with a linkage hole, the upper end of the rotating shaft part extends into the transmission channel and is inserted into the linkage hole, the threaded mold core can move up and down relative to the rotating shaft part, and the upper end of the rotating shaft part can drive the threaded mold core to rotate by matching with the linkage hole.

[0010] According to some embodiments of the present invention, the gear condition cooperates with the second transmission member to define a guide groove, the guide groove extends along the movement direction of the second transmission member, and the fixed mold assembly is correspondingly provided with a guide rail that cooperates with the guide groove.

[0011] According to some embodiments of the present invention, the fixed mold assembly is provided with a core shaft, the linkage hole is provided with a vent in a flared shape at the upper end surface of the threaded mold core, the core shaft passes through the rotating shaft and the threaded mold core, a ventilation gap is provided between the upper part of the core shaft and the inner wall of the linkage hole, the core shaft is provided with an air duct, and the air duct can be connected to the vent through the ventilation gap, the upper end of the core shaft is provided with a first plug portion adapted to the vent, and the threaded mold core can move up and down relative to the core shaft, so that the first plug portion blocks the vent or releases the blockage of the vent.

[0012] According to some embodiments of the present invention, a linkage structure is provided between the movable mold assembly and the top plate assembly, and the linkage structure includes a first linkage member and a second linkage member, one of the first linkage member and the second linkage member is provided on the movable mold assembly, and the other is correspondingly provided on the top plate assembly, the first linkage member is provided with a linkage groove, and the second linkage member is located in the linkage groove, when the top plate assembly moves up and down, the second linkage member can move along the linkage groove, so that the movable mold assembly and the top plate assembly can move relative to each other, and the top plate assembly can drive the movable mold assembly to move through the abutment between the second linkage member and the groove wall at the end of the linkage groove.

[0013] According to some embodiments of the present invention, the fixed mold assembly is provided with a first cooling channel and a second cooling channel inside, the movable mold assembly is provided with a third cooling channel inside, the side of the fixed mold assembly is provided with a first joint and a second joint, the first joint is docked with the input end of the first cooling channel for inputting coolant into the first cooling channel, the second joint is docked with the output end of the second cooling channel for outputting coolant from the second cooling channel, the output end of the first cooling channel and the input end of the second cooling channel are both provided with a first switch valve, and the input end and output end of the third cooling channel are both provided with a second switch valve; the movable mold assembly When the mold is closed with the fixed mold assembly, the output end of the first cooling channel is connected to the input end of the third cooling channel, and the output end of the third cooling channel is connected to the input end of the second cooling channel, and the first switch valve and the second switch valve are both in an open state, so that the third cooling channel can be connected to the first cooling channel and the second cooling channel respectively; when the movable mold assembly is opened with the fixed mold assembly, the output end of the first cooling channel is separated from the input end of the third cooling channel, and the output end of the third cooling channel is separated from the input end of the second cooling channel, and the first switch valve and the second switch valve are both in a closed state.

[0014] According to some embodiments of the present invention, the first switch valve includes a first housing, a first switch member and a first elastic member, the first housing is provided with a first passage extending vertically, the first switch member penetrates the first passage and is connected to the first housing movably up and down, a second plug is provided at the lower end of the first switch member, the first elastic member acts on the first switch member so that the first switch member has a tendency to move upward, and the second plug can block the lower end opening of the first passage under the action of the first elastic member; the second switch valve includes a second housing, a second switch member and a second elastic member, the second housing is provided with a second passage extending vertically, the second switch member penetrates the second passage The movable mold assembly and the fixed mold assembly are connected to the second housing and can move up and down. The upper end of the second switch member is provided with a third plug. The second elastic member acts on the second switch member, so that the second switch member has a tendency to move downward. The third plug can block the upper end opening of the second channel under the action of the second elastic member. When the movable mold assembly and the fixed mold assembly are molded, the first switch member and the second switch member can push each other to move, so that the first switch member overcomes the force of the first elastic member and moves downward, and the second switch member overcomes the force of the second elastic member and moves upward. When the movable mold assembly and the fixed mold assembly are molded, the first switch member and the second switch member are separated.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 This is a schematic structural diagram of an injection mold for a threaded cap according to an embodiment of the present invention;

[0018] Figure 2 for Figure 1 A schematic diagram of the structure of the injection mold for the threaded cap in another state;

[0019] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure of the injection mold for the middle threaded cap;

[0020] Figure 4 for Figure 3 A magnified schematic diagram of part A;

[0021] Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure of the middle thread mold core in another state;

[0022] Figure 6 for Figure 1 Schematic diagram of part of the structure of the injection mold for the threaded cap;

[0023] Figure 7 for Figure 1 Schematic diagram of the partial structural cross section of the injection mold for the middle threaded cap at the joint of the cooling channel;

[0024] Figure 8 for Figure 7 A schematic cross-sectional view of the structure at the middle joint in another state;

[0025] Fig. 9 for Figure 8 A schematic cross-sectional structure diagram of the first switch valve;

[0026] Fig.10 for Figure 8 Schematic diagram of the cross-sectional structure of the second switch valve.

[0027] Reference numerals:

[0028] Cavity 101, movable mold assembly 110, second linkage member 111, third cooling channel 112;

[0029] Fixed mold assembly 210, first magnetic member 211, transmission channel 212, guide rail 213, first cooling channel 214, second cooling channel 215, first joint 216, second joint 217, threaded mold core 220, linkage hole 221, transmission part 222, vent 223, second transmission member 230, first transmission groove 231, groove opening 232, clamping recess 233, second magnetic member 234, gear condition 240, guide groove 241, first gear member 250, second gear member 260, rotating shaft member 270, second transmission groove 271, mandrel 280, ventilation gap 281, vent 282, first plug 283;

[0030] Top plate assembly 310, first transmission member 320, roller 321, first linkage member 330, linkage slot 331;

[0031] The first switch valve 410, the first shell 411, the first switch member 412, the first elastic member 413, the first channel 414, the second plug portion 415, the first connecting groove 416, the connecting pipe portion 417, the second switch valve 420, the second shell 421, the second switch member 422, the second elastic member 423, the second channel 424, the third plug portion 425, and the second connecting groove 426. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] In the description of the present invention, it is necessary to understand that if it involves orientation description, the orientation or position relationship indicated by, for example, up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] In the description of the present invention, if the words such as several, greater than, less than, exceed, above, below, within, etc. appear, among which, several means one or more, more means more than two, greater than, less than, exceed, etc. are understood as not including the number itself, and above, below, within, etc. are understood as including the number itself.

[0035] If the first and second are described, they are only used to distinguish the technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0036] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0037] Reference Figures 1 to 5 A threaded cap injection mold, comprising a movable mold assembly 110, a fixed mold assembly 210 and a top plate assembly 310, wherein the fixed mold assembly 210 is arranged at the lower side of the movable mold assembly 110 and is provided with a threaded mold core 220, and the top plate assembly 310 is arranged at the upper side of the movable mold assembly 110 and is connected to the movable mold assembly 110, and can drive the movable mold assembly 110 to move up and down, so that the movable mold assembly 110 and the fixed mold assembly 210 can open or close the mold, and the movable mold assembly 110 and the fixed mold assembly 210 can define a cavity 101 when the mold is closed. The top plate assembly 310 is provided with a first transmission member 320, and the fixed mold assembly 210 is provided with a second transmission member 230 which can move horizontally. The top plate assembly 310 can drive the first transmission member 320 to move up and down and drive the second transmission member 230 to move horizontally through the first transmission member 320. A transmission structure is provided between the second transmission member 230 and the threaded mold core 220. The second transmission member 230 can drive the threaded mold core 220 to rotate and move through the transmission structure, so that the threaded mold core 220 enters or leaves the cavity 101.

[0038] It is understandable that if Figures 1 to 5 As shown, the top plate assembly 310, the movable mold assembly 110 and the fixed mold assembly 210 are arranged in sequence from top to bottom. The first transmission member 320 is fixedly arranged on the side of the top plate assembly 310 and can move up and down with the top plate assembly 310. The second transmission member 230 is movably connected to the fixed mold assembly 210 and can move forward and backward relative to the fixed mold assembly 210. The threaded mold core 220 is arranged inside the fixed mold assembly 210 and can rotate and move relative to the fixed mold assembly 210. When in use, the top plate assembly 310 is connected to an external mechanism that drives the mold to open and close. Figure 1 and Figure 2 When the mold is closed, the top plate assembly 310 moves downward and drives the first transmission member 320 and the movable mold assembly 110 to move downward. The first transmission member 320 drives the second transmission member 230 to move horizontally backward. The second transmission member 230 drives the threaded mold core 220 to rotate and move upward through the transmission structure. Figure 3 and Figure 4 , so that when the movable mold assembly 110 and the fixed mold assembly 210 are completed, the upper part of the threaded mold core 220 enters the cavity 101, so that during the subsequent injection molding, the cover body in the cavity 101 forms a threaded structure; refer to Figure 1 and Figure 2When the mold is opened, the top plate assembly 310 moves upward and drives the first transmission member 320 and the movable mold assembly 110 to move upward, and the second transmission member 230 is driven by the first transmission member 320 to move forward horizontally and reset. Figure 3 , Figure 4 and Figure 5 , the second transmission member 230 drives the threaded mold core 220 to rotate and move downward to leave the cavity 101 through the transmission structure, so that after the movable mold assembly 110 and the fixed mold assembly 210 are opened, the threaded mold core 220 is separated from the cover body in the cavity 101 to facilitate the subsequent demolding of the cover body. By adopting the above structure, the injection mold can use the opening and closing movement between the movable mold assembly 110 and the fixed mold assembly 210 to drive the threaded mold core 220 to move out of the cavity 101 or enter the cavity 101 accordingly, without the need to set up an additional driving device to drive the threaded mold core 220 to move, which is conducive to reducing manufacturing costs and simplifying the mold structure, and is convenient for production and use.

[0039] In actual application, the specific structures of the movable mold assembly 110, the fixed mold assembly 210 and the top plate assembly 310 can be set accordingly according to actual use needs. The specific structures of the first transmission member 320, the second transmission member 230 and the transmission structure are not described in detail here and will be described in detail below.

[0040] In some embodiments, the first transmission member 320 extends downward and has a roller 321 rotatably connected to its lower end. The second transmission member 230 is provided with a first transmission groove 231. The first transmission groove 231 is tilted and has a groove opening 232 on the upper side for the roller 321 to enter. The roller 321 can move up and down with the first transmission member 320 and push against the groove wall of the first transmission groove 231 to drive the second transmission member 230 to move horizontally.

[0041] It is understandable that if Figure 1 and Figure 2 As shown, the first transmission member 320 extends downward and the lower end is rotatably connected to a roller 321. The first transmission slot 231 is tilted relative to the longitudinal direction so that its front end is lower than the rear end, and the slot opening 232 is arranged at the rear end of the first transmission slot 231. When the first transmission member 320 moves downward, the roller 321 on the first transmission member 320 can enter the first transmission slot 231 from the slot opening 232, and the roller 321 moves downward and pushes against the lower slot wall of the first transmission slot 231, thereby driving the second transmission member 230 to move backward; when the first transmission member 320 moves upward, the roller 321 moves upward and pushes against the upper slot wall of the first transmission slot 231, thereby driving the second transmission member 230 to move forward, realizing the conversion of the up and down movement of the mold opening and closing into the horizontal reciprocating movement of the second transmission member 230, with a simple structure and easy use.

[0042] In actual application, in addition to the above structure, the motion conversion can also be achieved through a wedge block. For example, two wedge blocks that cooperate with each other are respectively provided at the lower end of the first transmission member 320 and the upper side of the second transmission member 230. The reversing transmission of the wedge structure can realize the conversion of the up and down movement of the opening and closing mold into the horizontal reciprocating movement of the second transmission member 230. Alternatively, the first transmission member 320 is connected to a rack extending in the up and down direction, and the second transmission member 230 is connected to a rack extending in the front and back direction. Both racks are meshed with the same gear. When the rack of the first transmission member 320 moves up and down, it will drive the rack of the second transmission member 230 to move forward and backward through the gear, thereby realizing reversing transmission. The specific setting can be made according to actual use needs.

[0043] In some embodiments, a snap-in recess 233 is disposed at the lower side of the first transmission groove 231 , and when the movable mold assembly 110 and the fixed mold assembly 210 are molded together, the roller 321 can be snapped into the snap-in recess 233 .

[0044] It is understandable that if Figure 1 and Figure 2 As shown, the engaging recess 233 is provided at the lower front end of the first transmission groove 231 and is adapted to the shape of the roller 321. When the movable mold assembly 110 and the fixed mold assembly 210 are in the mold closing state, the roller 321 can be engaged in the engaging recess 233, thereby limiting the relative movement between the first transmission member 320 and the second transmission member 230, achieving relative fixation of the two, reducing the possibility of loosening and deflection of the second transmission member 230, thereby reducing the possibility of rotation and movement of the threaded mold core 220 during the injection molding process, and improving the reliability of use. In actual application, the size and specific position of the engaging recess 233 can be set accordingly according to actual use needs.

[0045] In some embodiments, the fixed mold assembly 210 is provided with two first magnetic members 211 , and the two first magnetic members 211 are spaced apart and arranged along the movement direction of the second transmission member 230 , and the second transmission member 230 is correspondingly provided with a second magnetic member 234 that can magnetically cooperate with the first magnetic member 211 .

[0046] It is understandable that if Figure 1 , Figure 2 and Figure 6As shown, the two first magnetic parts 211 are arranged at intervals along the front-to-back direction, and the second magnetic parts 234 are respectively provided at the front and rear of the second transmission member 230. When the movable mold assembly 110 and the fixed mold assembly 210 are in the mold closing state, the second magnetic part 234 on the rear side of the second transmission member 230 is magnetically matched with the first magnetic part 211 located at the rear side, thereby magnetically fixing the second transmission member 230, further reducing the possibility of loosening and deviation of the second transmission member 230, and avoiding the threaded mold core 220 from rotating and moving during the injection molding process; when the movable mold assembly 110 and the fixed mold assembly 210 are in the mold opening state, the second magnetic part 234 on the front side of the second transmission member 230 is magnetically matched with the first magnetic part 211 located at the front side, thereby magnetically fixing the second transmission member 230, avoiding the position change of the slot opening 232, which causes the roller 321 to be unable to enter the first transmission slot 231 during the subsequent mold closing, thereby improving the reliability of use. In actual application, the second magnetic member 234 on the second transmission member 230 can also be set as one, and the specific arrangement positions of the first magnetic member 211 and the second magnetic member 234 can be set accordingly according to actual use requirements.

[0047] In some embodiments, the transmission structure includes a gear condition 240, a first gear member 250, a second gear member 260 and a rotating shaft member 270, the gear condition 240 is connected to the second transmission member 230 and moves with the second transmission member 230, the first gear member 250 and the second gear member 260 are both rotatably connected to the fixed mold assembly 210, the first gear member 250 is respectively meshed with the gear condition 240 and the second gear member 260 for transmission, the rotating shaft member 270 is connected to the second gear member 260 and rotates with the second gear member 260, and the fixed mold The component 210 is provided with a transmission channel 212, and the transmission channel 212 is located below the cavity 101. The threaded mold core 220 is partially located in the transmission channel 212 and cooperates with the inner wall thread of the transmission channel 212. The threaded mold core 220 is provided with a linkage hole 221. The upper end of the rotating shaft 270 extends into the transmission channel 212 and is inserted into the linkage hole 221. The threaded mold core 220 can move up and down relative to the rotating shaft 270. The upper end of the rotating shaft 270 can drive the threaded mold core 220 to rotate by cooperating with the linkage hole 221.

[0048] It is understandable that if Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, the gear condition 240 extends in the front-to-back direction and is fixedly connected to the second transmission member 230 so as to move forward and backward with the second transmission member 230. The first gear member 250 and the second gear member 260 are both rotatably connected to the fixed mold assembly 210. The first gear member 250 is meshed with the gear condition 240 and the second gear member 260 for transmission respectively. When the gear condition 240 moves forward and backward, the gear condition 240 drives the first gear member 250 to rotate, and the first gear member 250 drives the second gear member 260 to rotate; the rotating shaft member 270 is connected to the second gear member 260 and rotates with the second gear member 260. The rotating shaft member 270 is provided with a second transmission groove 271 extending in the up-down direction. The fixed mold assembly 210 is provided with a transmission channel 212, and the transmission channel 212 is located below the cavity 101. The threaded mold core 220 is partially located in the transmission channel 212 and is threadedly matched with the inner wall of the transmission channel 212. The threaded mold core 220 is provided with a linkage hole 221, and the inner wall of the linkage hole 221 is provided with a transmission part 222 corresponding to the second transmission groove 271. The upper end of the rotating shaft 270 extends into the transmission channel 212 and is inserted into the linkage hole 221, so that the threaded mold core 220 and the rotating shaft 270 can move up and down relatively. The transmission part 222 on the inner wall of the linkage hole 221 is inserted into the second transmission groove 271 of the rotating shaft 270. When the rotating shaft 270 rotates, the rotating shaft 270 can drive the threaded mold core 220 to rotate through the cooperation of the transmission part 222 and the second transmission groove 271. Through the thread cooperation between the inner wall of the transmission channel 212 and the threaded mold core 220, the threaded mold core 220 will move up and down by screwing the thread when it rotates, so that the threaded mold core 220 can enter or leave the mold cavity 101 in the form of a spiral motion. It has a simple structure, stable and reliable transmission, and is easy to use.

[0049] In actual application, the number of rotations of the second gear member 260 can be controlled by designing the gear ratio of the first gear member 250 and the second gear member 260. In addition to the above structure, a rotating wheel can be fixedly provided on the first gear member 250, and the second transmission member 230 and the rotating wheel are frictionally matched, so that when the second transmission member 230 moves, the rotating wheel can be driven to rotate, thereby driving the first gear member 250 to rotate. In addition to the gear meshing transmission, it can also be transmitted by means of sprockets and chains or synchronous pulleys and synchronous belts. The threaded mold core 220 It can also be fixedly connected with the rotating shaft 270, so that the rotating shaft 270 cooperates with the inner wall thread of the transmission channel 212 and can spirally move relative to the transmission channel 212. The threaded mold core 220 and the rotating shaft 270 can also realize rotational transmission through the cooperation of non-circular shaft holes. For example, the linkage hole 221 is a square hole structure, and the upper end of the rotating shaft 270 is a corresponding quadrangular prism structure and is inserted into the linkage hole 221, so that the rotating shaft 270 can drive the threaded mold core 220 to rotate. The specific changes can be made according to actual usage needs.

[0050] In some embodiments, the gear condition 240 cooperates with the second transmission member 230 to define a guide groove 241 , and the guide groove 241 extends along the movement direction of the second transmission member 230 . The fixed mold assembly 210 is correspondingly provided with a guide rail 213 that cooperates with the guide groove 241 .

[0051] It is understandable that if Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, the rack member 240 cooperates with the second transmission member 230 to define guide grooves 241 on both the upper and lower sides of the rack member 240. The guide grooves 241 extend in the front-to-back direction. The guide rails 213 extend in the front-to-back direction and are provided with two. The two guide rails 213 cooperate with the two guide grooves 241 respectively, so as to better guide the front-to-back movement of the rack member 240, and at the same time better limit the up-down and left-right positions of the rack member 240, to ensure reliable transmission. In actual application, the specific structures of the guide grooves 241 and the guide rails 213 can be set accordingly according to actual use needs.

[0052] In some embodiments, the fixed mold assembly 210 is provided with a core shaft 280, and the linkage hole 221 is provided with a vent 223 in a flared shape at the upper end surface of the threaded mold core 220. The core shaft 280 is penetrated by a rotating shaft 270 and the threaded mold core 220. A ventilation gap 281 is provided between the upper part of the core shaft 280 and the inner wall of the linkage hole 221. The core shaft 280 is provided with an air duct 282, and the air duct 282 can be connected to the vent 223 through the ventilation gap 281. The upper end of the core shaft 280 is provided with a first plug portion 283 adapted to the vent 223, and the threaded mold core 220 can move up and down relative to the core shaft 280, so that the first plug portion 283 blocks the vent 223 or releases the blockage of the vent 223.

[0053] It is understandable that if Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the mandrel 280 extends in the up-down direction, and its lower end is connected and fixed to the fixed mold assembly 210. The mandrel 280 passes through the rotating shaft 270 and the threaded mold core 220. A ventilation gap 281 is provided between the upper part of the mandrel 280 and the inner wall of the linkage hole 221. An air passage 282 is provided inside the mandrel 280. The linkage hole 221 is provided with a vent 223 in a flared shape at the upper end surface of the threaded mold core 220. The upper end of the mandrel 280 is correspondingly provided with a first plug 283 adapted to the vent 223. Figure 4 In the mold closing state, the first plug 283 blocks the vent 223, see Figure 5When the mold is opened, the threaded mold core 220 spirally moves downward. Since the vent 223 is a flared structure, once the threaded mold core 220 moves downward, a gap will appear between the outer wall of the first plug portion 283 and the inner wall of the vent 223, so that the vent 223 is quickly unblocked, and the air channel 282 can be connected to the vent 223 through the ventilation gap 281, thereby avoiding the formation of negative pressure between the upper end surface of the threaded mold core 220 and the cover body due to the downward movement of the threaded mold core 220, thereby reducing the possibility of deformation of the cover body caused by this.

[0054] In actual application, the air duct 282 can be connected to the external atmosphere or to an external air supply device. The core shaft 280 and the fixed mold assembly 210 can also be movably connected so that the core shaft 280 can move up and down. The core shaft 280 is connected to the pushing mechanism, and the core shaft 280 is driven to move upward and push the cover body to move, thereby assisting the cover body in demoulding. The specific settings can be made according to actual use needs.

[0055] In some embodiments, a linkage structure is provided between the movable mold assembly 110 and the top plate assembly 310, and the linkage structure includes a first linkage member 330 and a second linkage member 111, one of the first linkage member 330 and the second linkage member 111 is provided on the movable mold assembly 110, and the other is correspondingly provided on the top plate assembly 310, and a linkage groove 331 is provided on the first linkage member 330, and the second linkage member 111 is located in the linkage groove 331. When the top plate assembly 310 moves up and down, the second linkage member 111 can move along the linkage groove 331, so that the movable mold assembly 110 and the top plate assembly 310 can move relative to each other, and the top plate assembly 310 can drive the movable mold assembly 110 to move through the contact between the second linkage member 111 and the end groove wall of the linkage groove 331.

[0056] It is understandable that if Figure 1 and Figure 2As shown, the first linkage member 330 is disposed on the top plate assembly 310 , and the second linkage member 111 is correspondingly disposed on the movable mold assembly 110 . The first linkage member 330 is provided with a linkage groove 331 extending in the up-down direction, and the second linkage member 111 is located in the linkage groove 331 . When performing the mold closing operation, the top plate assembly 310 can be first moved downward relative to the movable mold assembly 110. At this time, the second linkage member 111 moves upward relative to the linkage groove 331. After the top plate assembly 310 moves downward to contact the movable mold assembly 110, it pushes the mold assembly 110 to move downward together; or, when the top plate assembly 310 moves downward, the movable mold assembly 110 is first driven downward together by the cooperation of the first linkage member 330 and the second linkage member 111. After the movable mold assembly 110 cooperates with the fixed mold assembly 210, the top plate assembly 310 continues to move downward to move downward relative to the movable mold assembly 110. At this time, the second linkage member 111 moves upward relative to the linkage groove 331, and the first transmission member 320 moves downward and drives the second transmission member 230 to move. When performing the mold opening operation, the top plate assembly 310 moves up relative to the movable mold assembly 110. At this time, the second linkage member 111 moves down relative to the linkage groove 331, and the first transmission member 320 moves up and drives the second transmission member 230 to move and reset. When the top plate assembly 310 moves up to make the second linkage member 111 contact the lower end groove wall of the linkage groove 331, the top plate assembly 310 drives the movable mold assembly 110 to move upward to open the mold through the contact between the second linkage member 111 and the end groove wall of the linkage groove 331. Through the above structure, the threaded mold core 220 can move into position and enter the mold cavity 101 when the mold is closed, and the threaded mold core 220 can move out of the mold cavity 101 before the mold is opened, realizing sequential control and facilitating the subsequent demoulding operation. In actual application, the first linkage member 330 can also be arranged on the movable mold assembly 110, and the second linkage member 111 is arranged on the top plate assembly 310. The specific structures of the first linkage member 330 and the second linkage member 111 can also be changed accordingly according to actual use needs.

[0057] In some embodiments, the fixed mold assembly 210 is provided with a first cooling channel 214 and a second cooling channel 215 inside, the movable mold assembly 110 is provided with a third cooling channel 112 inside, and the side of the fixed mold assembly 210 is provided with a first joint 216 and a second joint 217, the first joint 216 is connected to the input end of the first cooling channel 214, and is used to input coolant into the first cooling channel 214, the second joint 217 is connected to the output end of the second cooling channel 215, and is used for the second cooling channel 215 to output coolant, the output end of the first cooling channel 214 and the input end of the second cooling channel 215 are both provided with a first switch valve 410, and the input end and output end of the third cooling channel 112 are both provided with a second switch valve 420; When the mold assembly 110 and the fixed mold assembly 210 are closed, the output end of the first cooling channel 214 is connected to the input end of the third cooling channel 112, and the output end of the third cooling channel 112 is connected to the input end of the second cooling channel 215, and the first switch valve 410 and the second switch valve 420 are both in the open state, so that the third cooling channel 112 can be connected to the first cooling channel 214 and the second cooling channel 215 respectively; when the movable mold assembly 110 and the fixed mold assembly 210 are opened, the output end of the first cooling channel 214 is separated from the input end of the third cooling channel 112, and the output end of the third cooling channel 112 is separated from the input end of the second cooling channel 215, and the first switch valve 410 and the second switch valve 420 are both in the closed state.

[0058] It is understandable that if Figure 1 , Figure 2 , Figure 3 , Figure 7 and Figure 8 As shown, the front side of the fixed mold assembly 210 is provided with a first joint 216 and a second joint 217, the fixed mold assembly 210 is provided with a first cooling channel 214 and a second cooling channel 215, the movable mold assembly 110 is provided with a third cooling channel 112, the output end of the first cooling channel 214 and the input end of the second cooling channel 215 are both provided with a first switch valve 410, and the input end and the output end of the third cooling channel 112 are both provided with a second switch valve 420. When in use, the external pipeline connects the first joint 216 and the second joint 217, and the coolant is input into the first cooling channel 214 through the first joint 216. Figure 3 and Figure 7When the movable mold assembly 110 and the fixed mold assembly 210 are molded together, the output end of the first cooling channel 214 is connected to the input end of the third cooling channel 112, and the output end of the third cooling channel 112 is connected to the input end of the second cooling channel 215. The first switch valve 410 and the second switch valve 420 are both in the open state, so that the first cooling channel 214, the third cooling channel 112 and the second cooling channel 215 are connected in sequence, and the coolant in the first cooling channel 214 enters the third cooling channel 112 and enters the second cooling channel 215 from the third cooling channel 112, and then is output from the second joint 217, so as to realize the cooling of the movable mold assembly 110 and the fixed mold assembly 210, and facilitate the finalization of the cover body; refer to Figure 2 and Figure 8 When the movable mold assembly 110 and the fixed mold assembly 210 are opened, the output end of the first cooling channel 214 is separated from the input end of the third cooling channel 112, and the output end of the third cooling channel 112 is separated from the input end of the second cooling channel 215. The first switch valve 410 and the second switch valve 420 are both in a closed state, so that the connection between the three is disconnected, and the coolant cannot be input or output from the connection, thereby preventing the coolant from leaking.

[0059] In a traditional injection mold, when both the movable mold and the fixed mold are provided with cooling channels, usually both the fixed mold and the movable mold will be connected to pipelines for input and output of coolant. Such a design results in more pipelines connected to the side of the mold, which is complex in structure. Moreover, when the movable mold moves, it will drive the pipelines to move together, pulling the pipelines, making the pipelines easy to loosen, affecting the use. Compared with the traditional structure, the above structure of the present invention is that the third cooling channel 112 of the movable mold assembly 110 is connected with the first cooling channel 214 and the second cooling channel 215 of the fixed mold assembly 210 to input and output the coolant. The movable mold assembly 110 does not need to connect additional pipelines for input and output of the coolant, which simplifies the pipeline structure on the side of the mold. Moreover, the pipelines are all connected to the fixed mold assembly 210, and the pipelines do not need to move with the movable mold assembly 110, which reduces the possibility of loosening of the pipeline connection and is convenient for use.

[0060] In actual application, the specific channel structures of the first cooling channel 214, the second cooling channel 215 and the third cooling channel 112 can be set accordingly according to actual use needs. The specific structures of the first switch valve 410 and the second switch valve 420 are not described in detail here and will be described in detail below.

[0061] In some embodiments, the first switch valve 410 includes a first shell 411, a first switch member 412 and a first elastic member 413. The first shell 411 is provided with a first channel 414 that runs through from top to bottom. The first switch member 412 passes through the first channel 414 and can be moved up and down and connected to the first shell 411. The lower end of the first switch member 412 is provided with a second plug 415. The first elastic member 413 acts on the first switch member 412, so that the first switch member 412 has a tendency to move upward. The second plug 415 can block the lower end opening of the first channel 414 under the action of the first elastic member 413. The second switch valve 420 includes a second shell 421, a second switch member 422 and a second elastic member 423. The second shell 421 is provided with a second channel 424 that runs through from top to bottom. The second switch member 422 A second channel 424 is provided and can be moved up and down and connected to the second housing 421. A third plug 425 is provided at the upper end of the second switch member 422. The second elastic member 423 acts on the second switch member 422, so that the second switch member 422 has a tendency to move downward. The third plug 425 can block the upper end opening of the second channel 424 under the action of the second elastic member 423. When the movable mold assembly 110 and the fixed mold assembly 210 are molded, the first switch member 412 and the second switch member 422 can push each other to move, so that the first switch member 412 overcomes the force of the first elastic member 413 and moves downward, and the second switch member 422 overcomes the force of the second elastic member 423 and moves upward. When the movable mold assembly 110 and the fixed mold assembly 210 are opened, the first switch member 412 and the second switch member 422 are separated.

[0062] It is understandable that if Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, the first channel 414 is through-through, the first switch member 412 is provided through the first channel 414 and can be moved up and down and connected to the first housing 411, the lower end of the first switch member 412 is provided with a second plug 415, the first elastic member 413 is a spring, which is sleeved on the first switch member 412, and the upper and lower ends of the first elastic member 413 act on the first housing 411 and the first switch member 412 respectively, and the first switch valve 410 is connected to the output end of the first cooling channel 214 or the input end of the second cooling channel 215 through the first housing 411; the second switch valve The structure of 420 is similar to that of the first switch valve 410. The second channel 424 runs through from top to bottom. The second switch member 422 passes through the second channel 424 and can be moved up and down to be connected to the second shell 421. The upper end of the second switch member 422 is provided with a third plug 425. The second elastic member 423 is a spring, which is sleeved on the second switch member 422. The upper and lower ends of the second elastic member 423 act on the second shell 421 and the second switch member 422 respectively. The second switch valve 420 is connected to the input end or the output end of the third cooling channel 112 through the second shell 421.

[0063] In the mold open state, refer to Figure 8 , Fig. 9 and Fig.10 The first switch member 412 moves upward under the action of the first elastic member 413, so that the second plug 415 blocks the lower end opening of the first channel 414, and the first switch valve 410 is in a closed state, thereby closing the joints of the cooling channels to prevent leakage of the coolant.

[0064] When closing the mold, refer to Figure 7 and Figure 8 The movable mold assembly 110 and the fixed mold assembly 210 move relatively close to each other, so that the first switch member 412 of the first switch valve 410 and the second switch member 422 of the second switch valve 420 contact each other. As the mold is closed, the two push each other to move, so that the first switch member 412 overcomes the force of the first elastic member 413 and moves downward, driving the second plug cloth to move downward to release the blockage of the first channel 414. The first channel 414 connects the upper and lower flow channels, and the first switch valve 410 is in an open state. At the same time, the second switch member 422 overcomes the force of the second elastic member 423 and moves upward, bringing The movable third plug 425 moves upward to release the blockage of the second channel 424, the second channel 424 connects the upper and lower channels, and the second switch valve 420 is in an open state, so that the first cooling channel 214, the third cooling channel 112 and the second cooling channel 215 are connected in sequence; when the mold is opened, the movable mold assembly 110 and the fixed mold assembly 210 move away from each other, and the first switch member 412 and the second switch member 422 are gradually separated, so that the first switch valve 410 and the second switch valve 420 are restored to the closed state under the action of the first elastic member 413 and the second elastic member 423.

[0065] The above structure is simple and reasonable. The first switch valve 410 and the second switch valve 420 are opened when the mold is closed and closed when the mold is opened through a mechanical structure. No additional line connection and control are required, and it is easy to use.

[0066] In actual application, in addition to the above structure, the first switch valve 410 and the second switch valve 420 can also be solenoid valves, which are electrically controlled to open or close the solenoid valves, so that the docking points of each cooling channel are opened or closed. Since the specific structure of the solenoid valve in the embodiment of the present invention is known to ordinary technicians in this field, it will not be described in detail here.

[0067] In some embodiments, the first shell 411 is provided with a first connecting groove 416, which is provided at the upper end opening of the first channel 414 and can connect the upper area of ​​the first channel 414 with the first channel 414; the second shell 421 is provided with a second connecting groove 426, which is provided at the lower end opening of the second channel 424 and can connect the lower area of ​​the second channel 424 with the second channel 424. It is understandable that, as Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, by providing the first connecting groove 416 and the second connecting groove 426, the first connecting groove 416 is used to connect the upper area of ​​the first channel 414 and the first channel 414, which is conducive to avoiding the upper part of the first switch member 412 and the first elastic member 413 from hindering the coolant from entering the first channel 414 from the upper side, and the second connecting groove 426 is used to connect the lower area of ​​the second channel 424 and the second channel 424, which is conducive to avoiding the lower part of the second switch member 422 and the second elastic member 423 from hindering the coolant from entering the second channel 424 from the lower side. When the first switch valve 410 and the second switch valve 420 are in the open state, the effective circulation of the coolant can be ensured, which is convenient for use. In actual application, the specific structures of the first connecting groove 416 and the second connecting groove 426 can be set accordingly according to actual use needs.

[0068] In some embodiments, the first shell 411 is provided with a docking tube portion 417, which extends upward and has an upper end surface higher than the upper end surface of the first switch component 412. When the movable mold assembly 110 and the fixed mold assembly 210 are molded, and before the first switch component 412 and the second switch component 422 contact each other, the docking tube portion 417 is inserted into the docking port corresponding to the third cooling channel 112.

[0069] It is understandable that if Figure 7 , Figure 8 and Fig. 9 As shown, the upper end surface of the butt joint pipe part 417 is higher than the upper end surface of the first switch member 412. When the mold is closed and before the first switch member 412 and the second switch member 422 contact each other, the butt joint pipe part 417 is inserted into the port at the input end or the port at the output end of the third cooling channel 112, so that the corresponding cooling channels are first butted before the two switch valves are opened, thereby reducing the possibility of coolant leaking from the butt joint of the cooling channel during the opening process of the switch valve, which is convenient for use. In actual application, the butt joint pipe part 417 can be set on the second shell 421 in addition to the first shell 411, then the butt joint pipe part 417 extends downward and the lower end surface is lower than the lower end surface of the second switch member 422. The specific structure of the butt joint pipe part 417 can be set accordingly according to actual use needs.

[0070] In some embodiments, when the movable mold assembly 110 and the fixed mold assembly 210 are opened, the first switch valve 410 and the second switch valve 420 can be closed asynchronously. It is understandable that, when other parameters are the same, the elastic modulus of the first elastic member 413 and the second elastic member 423 can be set to be different, so that there is a difference in the strength of the elastic force of the two, so that when the movable mold assembly 110 and the fixed mold assembly 210 are opened, the first switch member 412 and the second switch member 422 can act in sequence or asynchronously due to the difference in elastic force, so that the first switch valve 410 and the second switch valve 420 are closed in a preset order, which is conducive to reducing the possibility of coolant accumulation at the joint of the cooling channel and is convenient for use. In actual application, in addition to the above method, the asynchronous closing of the two switch valves can also be achieved by designing the difference in the moving stroke of the first switch member 412 and the second switch member 422. As for the specific closing order of the first switch valve 410 and the second switch valve 420, it can be set accordingly according to actual use needs and is not limited here.

[0071] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A screw cap injection mold, characterized in that: include: Moving mold components; A fixed mold assembly, which is arranged at the lower side of the movable mold assembly and is provided with a threaded mold core; A top plate assembly, wherein the top plate assembly is arranged on the upper side of the movable mold assembly and is connected to the movable mold assembly, and can drive the movable mold assembly to move up and down, so that the movable mold assembly and the fixed mold assembly can open or close the mold, and the movable mold assembly and the fixed mold assembly can define a cavity when the mold is closed. The top plate assembly is provided with a first transmission member, and the fixed mold assembly is provided with a second transmission member that can move horizontally. The top plate assembly can drive the first transmission member to move up and down and drive the second transmission member to move horizontally through the first transmission member. A transmission structure is provided between the second transmission member and the threaded mold core, and the second transmission member can drive the threaded mold core to rotate and move through the transmission structure, so that the threaded mold core enters or leaves the cavity.

2. The screw cap injection mold according to claim 1, characterized in that: The first transmission member extends downward and has a roller rotatably connected to its lower end. The second transmission member is provided with a first transmission groove. The first transmission groove is inclined and has a groove opening on its upper side for the roller to enter. The roller can move up and down with the first transmission member and push against the groove wall of the first transmission groove to drive the second transmission member to move horizontally.

3. The screw cap injection mold according to claim 2, characterized in that: A clamping recess is provided on the lower side of the first transmission groove, and when the movable mold assembly and the fixed mold assembly are molded together, the roller can be clamped into the clamping recess.

4. The injection mold for the threaded cap according to claim 2, characterized in that: The fixed mold assembly is provided with two first magnetic parts, and the two first magnetic parts are spaced and distributed along the moving direction of the second transmission part. The second transmission part is correspondingly provided with a second magnetic part that can be magnetically matched with the first magnetic part.

5. The injection mold for the threaded cap according to claim 1, characterized in that: The transmission structure includes a gear condition, a first gear member, a second gear member and a rotating shaft member, the gear condition is connected to the second transmission member and moves with the second transmission member, the first gear member and the second gear member are both rotatably connected to the fixed mold assembly, the first gear member is respectively meshed with the gear condition and the second gear member for transmission, the rotating shaft member is connected to the second gear member and rotates with the second gear member, the fixed mold assembly is provided with a transmission channel, the transmission channel is located below the cavity, the threaded mold core part is located in the transmission channel and is threadedly matched with the inner wall of the transmission channel, the threaded mold core is provided with a linkage hole, the upper end of the rotating shaft member extends into the transmission channel and is inserted into the linkage hole, the threaded mold core can move up and down relative to the rotating shaft member, and the upper end of the rotating shaft member can drive the threaded mold core to rotate by matching with the linkage hole.

6. The injection mold for the threaded cap according to claim 5, characterized in that: The gear condition cooperates with the second transmission member to define a guide groove, and the guide groove extends along the movement direction of the second transmission member. The fixed mold assembly is correspondingly provided with a guide rail that cooperates with the guide groove.

7. The injection mold for the threaded cap according to claim 5, characterized in that: The fixed mold assembly is provided with a core shaft, and the linkage hole is provided with a vent in a flared shape at the upper end surface of the threaded mold core. The core shaft passes through the rotating shaft and the threaded mold core, and a ventilation gap is provided between the upper part of the core shaft and the inner wall of the linkage hole. The core shaft is provided with an air duct, and the air duct can be connected to the vent through the ventilation gap. The upper end of the core shaft is provided with a first plug portion adapted to the vent, and the threaded mold core can move up and down relative to the core shaft, so that the first plug portion blocks the vent or releases the blockage of the vent.

8. The injection mold for the threaded cap according to claim 1, characterized in that: A linkage structure is provided between the movable mold assembly and the top plate assembly, and the linkage structure includes a first linkage member and a second linkage member, one of the first linkage member and the second linkage member is provided on the movable mold assembly, and the other is correspondingly provided on the top plate assembly, the first linkage member is provided with a linkage groove, and the second linkage member is located in the linkage groove, when the top plate assembly moves up and down, the second linkage member can move along the linkage groove, so that the movable mold assembly and the top plate assembly can move relative to each other, and the top plate assembly can drive the movable mold assembly to move through the contact between the second linkage member and the groove wall at the end of the linkage groove.

9. The injection mold for the threaded cap according to claim 1, characterized in that: The fixed mold assembly is provided with a first cooling channel and a second cooling channel inside, the movable mold assembly is provided with a third cooling channel inside, the side of the fixed mold assembly is provided with a first joint and a second joint, the first joint is connected to the input end of the first cooling channel, and is used to input coolant into the first cooling channel, the second joint is connected to the output end of the second cooling channel, and is used for the second cooling channel to output coolant, the output end of the first cooling channel and the input end of the second cooling channel are both provided with a first switch valve, and the input end and the output end of the third cooling channel are both provided with a second switch valve; When the movable mold assembly is molded with the fixed mold assembly, the output end of the first cooling channel is connected to the input end of the third cooling channel, and the output end of the third cooling channel is connected to the input end of the second cooling channel, and the first switch valve and the second switch valve are both in an open state, so that the third cooling channel can be connected to the first cooling channel and the second cooling channel respectively; When the movable mold assembly and the fixed mold assembly are opened, the output end of the first cooling channel is separated from the input end of the third cooling channel, the output end of the third cooling channel is separated from the input end of the second cooling channel, and the first switch valve and the second switch valve are both in a closed state.

10. The injection mold for the threaded cap according to claim 9, characterized in that: The first switch valve comprises a first housing, a first switch member and a first elastic member, the first housing is provided with a first channel which passes through the first housing, the first switch member passes through the first channel and is connected to the first housing in a manner that can move up and down, a second plug is provided at the lower end of the first switch member, the first elastic member acts on the first switch member to make the first switch member have a tendency to move upward, and the second plug can block the lower end opening of the first channel under the action of the first elastic member; The second switch valve comprises a second housing, a second switch member and a second elastic member, the second housing is provided with a second passage extending vertically, the second switch member passes through the second passage and is connected to the second housing in a manner that allows the second switch member to move vertically, a third plug is provided at the upper end of the second switch member, the second elastic member acts on the second switch member to make the second switch member have a tendency to move downward, and the third plug can block the upper end opening of the second passage under the action of the second elastic member; When the movable mold assembly is molded with the fixed mold assembly, the first switch member and the second switch member can push each other to move, so that the first switch member overcomes the force of the first elastic member and moves downward, and the second switch member overcomes the force of the second elastic member and moves upward; When the movable mold assembly and the fixed mold assembly are opened, the first switch component and the second switch component are separated.

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