A bottle preform injection molding machine nozzle apparatus

Abstract

The application relates to the technical field of injection molding machine nozzles, and discloses a bottle embryo injection molding machine nozzle device, which comprises a nozzle body, a moving and overturning assembly is installed on the outer side of the nozzle body, one end of the moving and overturning assembly is connected with an integrated head, a linkage lifting assembly and a spiral wire assembly are installed in the integrated head, and the lifting assembly and the spiral wire assembly are used for driving a cleaning needle to make lifting and spiral cleaning actions in the nozzle body. The bottle embryo injection molding machine nozzle device realizes the lifting and spiral wire actions of the cleaning needle driven by one motor, the lifting action enables the cleaning needle to gradually penetrate into the inside of an injection cavity, the spiral wire action simulates the step-by-step destruction and crushing of cooling materials by a tool, the two actions are cooperatively matched, the blocked materials in the injection cavity can be deeply crushed, the cooling materials are ensured to no longer block the flow channel, thus the nozzle is replaced by artificial cleaning, the cleaning efficiency is higher, and the cleaning time required in the injection molding production can be greatly shortened.

Description

Technical Field

[0001] This invention relates to the field of injection molding machine nozzle technology, specifically to a nozzle device for a preform injection molding machine. Background Technology

[0002] Injection molding machines are core equipment in the plastics processing industry. They are mainly used to produce various shapes of plastic products from thermoplastic or thermosetting plastics through steps such as heating and melting, pressurizing and injecting, and cooling and solidifying. The core workflow revolves around "plasticizing-injection-pressure holding-cooling-demolding": First, the plastic raw material is fed into the heated barrel by the hopper. The raw material is melted and plasticized by the rotating screw and the heating coil. Then, the screw moves forward and injects the molten plastic into the closed mold cavity at high pressure and high speed. During the pressure holding stage, a certain pressure is maintained to replenish the material and prevent the melt from flowing back or shrinking in the cavity. After the plastic cools and solidifies, the mold opens and the product is ejected, completing one molding cycle.

[0003] In the injection molding process, the nozzle device is the core component connecting the injection molding machine barrel and the mold cavity. Its operating status directly affects the molding efficiency and product quality. After the plastic raw material is heated and plasticized by the barrel, it needs to be injected into the mold through the nozzle with stable pressure and flow. During this process, the problem of material blockage at the nozzle is one of the key factors restricting the continuity of production.

[0004] The prior art, disclosed in CN217777604U, provides a nozzle device for a preform injection molding machine. This nozzle device includes a nozzle head, a nozzle body, and a heating element. The nozzle head has an injection hole, and the nozzle body has a flow channel hole. The injection hole and the flow channel hole are located on the same axis, and the nozzle head and nozzle body are connected to each other so that the injection hole and the flow channel hole are interconnected. The heating element is respectively sleeved on the nozzle head and nozzle body, and forms a thermally conductive connection with both. The preform injection molding machine nozzle device provided in this application allows the heating element to simultaneously heat both the nozzle head and nozzle body, preventing premature cooling of the molten material within the nozzle head and nozzle body, thereby avoiding clumping of the molten material at the outlet and improving product quality.

[0005] Although existing technologies include heating mechanisms on the outside of the nozzle to prevent the material from cooling prematurely, there is still a material storage space inside the nozzle. Once the heating mechanism stops working, the material is still prone to clumping. After clumping, workers in existing technologies usually need to disassemble the nozzle for manual cleaning. The nozzle does not have a self-cleaning function. In the processing of some injection molding machines, this clumping phenomenon is relatively frequent. The lack of self-cleaning ability of the nozzle, due to the need for frequent disassembly and assembly, will significantly reduce the injection molding efficiency.

[0006] Therefore, there is a need for a nozzle device for preform injection molding machines to solve the problems mentioned in the background art, such as easy clumping of material inside the nozzle, lack of self-cleaning function, and reduced injection efficiency due to frequent disassembly and assembly. Summary of the Invention

[0007] The purpose of this invention is to provide a nozzle device for a preform injection molding machine to solve the problems mentioned in the background art.

[0008] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a nozzle device for a preform injection molding machine, comprising a nozzle body, a movable flipping component installed on the outside of the nozzle body, and an integrated head connected to one end of the movable flipping component, wherein a linkage lifting component and a spiral component are installed inside the integrated head, and the lifting component and the spiral component are used to drive the cleaning needle to perform a lifting and spiral cleaning action inside the nozzle body.

[0009] The lifting assembly includes a worm gear, and an internal gear meshing with it is provided on one side of the worm gear. A first helical rod is connected below the internal gear, and a second helical rod matching it is provided on one side of the first helical rod. A helical assembly is installed at the top of the second helical rod, and a long gear for driving the helical assembly is installed at the top of the internal gear.

[0010] The spiral assembly includes a spiral block with a spiral groove inside. A connecting gear is connected to the bottom of the spiral block, and a transmission gear is located below the connecting gear. A small-diameter gear and a large-diameter gear mesh on one side of the connecting gear and the transmission gear, respectively. A moving track is provided above the spiral block, and a moving block is movably disposed inside the moving track. A cleaning needle is connected to the top of the moving block. A moving groove is provided at the bottom of the moving track, and a limiting pin matching the moving groove is provided at the bottom of the moving block. The limiting pin passes through the moving track and is located inside the spiral groove.

[0011] Preferably, the nozzle body includes a detachable first nozzle and a second nozzle, and the bottom end of the second nozzle is connected to a head. The first nozzle, the second nozzle and the head are all provided with injection molding cavities.

[0012] Preferably, the movable flipping assembly includes a fixed sleeve, and a mounting ring is connected to one side of the fixed sleeve. The mounting ring is installed on the outside of the nozzle body. A drive motor is installed on one side of the fixed sleeve, and a positioning gear is connected to the output end of the drive motor. A rack is meshed on one side of the positioning gear, and a connecting cylinder is provided at the bottom end of the rack. A movable sleeve is connected to the bottom end of the connecting cylinder, and an integrated head is installed at one end of the movable sleeve.

[0013] Preferably, the outer side of the connecting cylinder is provided with a flip groove, the outer side of the fixed sleeve is fixed with a positioning pin, and one end of the positioning pin is located inside the flip groove. The inside of the fixed sleeve is provided with a spring, and the spring is sleeved on the outer side of the movable sleeve.

[0014] Preferably, the lifting assembly includes a cleaning motor, and the output end of the cleaning motor is connected to a worm gear, which is located on one side of the worm wheel and meshes with it. The worm wheel includes external teeth, internal teeth, and a ring portion, with the external teeth located on the outside of the ring portion and the internal teeth located inside the ring portion, meshing with an internal gear. The external teeth mesh with the worm gear, and the second helical rod is located at the center of the worm wheel, penetrating the worm wheel and extending to its outside.

[0015] Preferably, a connecting shaft is provided through the interior of the internal gear and the first spiral rod, and a lifting shaft is provided through the interior of the second spiral rod. Limiting plates and fixing plates are connected to the upper and lower sides of the connecting shaft and the lifting shaft. A mounting plate is connected to the top of the lifting shaft, and the mounting plate is located at the bottom of the spiral assembly. A long gear is connected to the top of the connecting shaft, and the long gear is located on one side of the large diameter gear and meshes with it.

[0016] Preferably, the transmission gear has a first rotating shaft inside, which passes through the spiral block and is connected to the moving track. A bearing is provided between the connecting gear and the first rotating shaft. The large-diameter gear has a second rotating shaft inside, and the large-diameter gear and the small-diameter gear are coaxial. The transmission gear and the large-diameter gear mesh with each other.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0018] First, this invention, through the setting of a lifting component and a spiral component, enables a single motor to drive the cleaning needle to simultaneously complete lifting and spiral movements. The lifting movement allows it to gradually penetrate into the injection cavity, while the spiral movement simulates manual tools to gradually break down and crush the cooling material. The two movements work together to deeply crush the material blocking the injection cavity, ensuring that the cooling material no longer blocks the flow channel, thereby replacing manual cleaning of the nozzle and achieving higher cleaning efficiency, which can significantly shorten the cleaning time required in injection molding production.

[0019] Secondly, the present invention, through the design of the nozzle body, the movable flipping component, and the integrated head, enables the cleaning structure installed inside the integrated head to be pushed out and flipped using the movable flipping component. The flipped cleaning structure is located below the head to be cleaned, facilitating the cleaning needle to carry out cleaning work. The cleaning mechanism in the storage state will flip to the side away from the head and retract its length, so as not to hinder the connection between the head and the injection mold. This structure combines the extension action and the reversal action, taking into account the state requirements of the nozzle when in use and when cleaning is required. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a cross-sectional view of the nozzle body of the present invention;

[0022] Figure 3 This is a split view of the movable flipping component of the present invention;

[0023] Figure 4 This is a schematic diagram of the partial component installation structure of the movable flipping assembly of the present invention;

[0024] Figure 5 This is a schematic diagram of the integrated head, lifting assembly, and spiral assembly of the present invention;

[0025] Figure 6 This is an exploded view of the integrated head, lifting assembly, and spiral assembly of the present invention;

[0026] Figure 7 For the present invention Figure 6 Enlarged view of the structure at point A;

[0027] Figure 8 This is a schematic diagram of the lifting assembly and spiral assembly of the present invention;

[0028] Figure 9 This is a schematic diagram of the spiral component structure of the present invention.

[0029] The components include: 1. Nozzle body; 101. First nozzle; 102. Second nozzle; 103. Head; 104. Injection cavity; 2. Moving and flipping assembly; 201. Fixed sleeve; 202. Mounting ring; 203. Drive motor; 204. Positioning gear; 205. Rack; 206. Connecting cylinder; 2061. Flipping groove; 207. Positioning pin; 208. Spring; 209. Moving sleeve; 3. Integrated head; 4. Lifting assembly; 401. Cleaning motor; 402. Worm gear; 403. Worm wheel; 4031. External gear. ; 4032, Internal gear; 404, Internal gear; 405, First helical rod; 406, Connecting shaft; 407, Second helical rod; 408, Lifting shaft; 409, Limiting plate; 410, Fixing plate; 411, Mounting plate; 412, Long gear; 5, Helical assembly; 501, Helical block; 502, Helical groove; 503, Connecting gear; 504, Transmission gear; 505, Large diameter gear; 506, Small diameter gear; 507, Moving track; 508, Moving block; 509, Limiting pin; 510, Cleaning needle. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figures 1-4 A nozzle device for a preform injection molding machine includes a nozzle body 1, a movable flipping component 2 installed on the outside of the nozzle body 1, and an integrated head 3 connected to one end of the movable flipping component 2.

[0032] In this embodiment, the device is equipped with control devices such as circuit boards and controllers, which are electrically connected to the electronic components in the device for convenient direct control. The internal cavity of the injection molding machine nozzle is a channel of PVC or other materials in the molten state. Due to different injection molding materials, the shape of the cavity used is also different, including variable diameter cavities and constant diameter cavities. The nozzle of this device uses a constant diameter cavity. Cavities with the same diameter facilitate the use of the cleaning needle 510. If a variable diameter cavity nozzle is used, the variable diameter part is generally at the junction of two sections of nozzle connected by threads. In this case, the two sections of nozzle can be separated using this device, and then this device can be used.

[0033] Specifically, the nozzle body 1 includes a detachable first nozzle 101 and a second nozzle 102, and the bottom end of the second nozzle 102 is connected to a head 103. The first nozzle 101, the second nozzle 102 and the head 103 are all provided with injection molding cavities 104.

[0034] In this embodiment, the first nozzle 101 and the second nozzle 102 are two-section nozzles that can be connected by threads for easy and quick installation and disassembly. When plastic impurities become trapped inside, the detachable nozzle is more flexible and easier to clean than a non-detachable nozzle. One end of the first nozzle 101 is connected to the injection molding machine, and the outer side of the head 103 is connected to the injection mold. When the material heated to a molten state in the injection molding machine is pressurized and transported into the nozzle body 1, the material flows inside the injection cavity 104 and is then transported to the injection mold through the head 103. It cools and solidifies in the mold, becoming the product material. The first nozzle 101 and the second nozzle 102 are located inside the injection cavity 104, on the outer side. A heating element can be installed to heat the material in the injection cavity 104, preventing it from cooling in the nozzle and thus avoiding frequent material blockage. Even with a heating element, residual material in the nozzle may still cool and cause blockage when the injection molding machine is running or shut down. The cooled material will harden. At this time, the cleaning structure such as the moving and flipping component 2 and the lifting component 4 can be activated. The cleaning needle 510 enters the injection cavity 104 through the opening of the head 103 at one end and cleans the hard residual material by gradually penetrating it. The spiral movement trajectory can gradually break down the hard layer and crush it. The crushed material can no longer block the injection cavity 104, allowing the nozzle to continue to be used.

[0035] Specifically, the movable flipping assembly 2 includes a fixed sleeve 201, and a mounting ring 202 is connected to one side of the fixed sleeve 201. The mounting ring 202 is installed on the outside of the nozzle body 1. A drive motor 203 is installed on one side of the fixed sleeve 201, and a positioning gear 204 is connected to the output end of the drive motor 203. A rack 205 is meshed on one side of the positioning gear 204, and a connecting cylinder 206 is provided at the bottom end of the rack 205. A movable sleeve 209 is connected to the bottom end of the connecting cylinder 206, and an integrated head 3 is installed at one end of the movable sleeve 209.

[0036] In this embodiment, the fixed sleeve 201 is fixedly connected to the mounting ring 202. The mounting ring 202 can be installed on the outside of the nozzle body 1 by means of a clamp or screw. The movable flipping assembly 2 is detachably connected to the nozzle body 1. Thus, in use, the movable flipping assembly 2 can be installed upside down, so that the cleaning needle 510 enters the injection cavity 104 from the feed port of the nozzle body 1 to clean. In this way, even if the blockage is located at the head of the nozzle body 1 or at the feed port, it can be broken up. In this way, even if the injection cavity 104 is long, the cleaning needle 510 can clean its interior from both ends, forming a through-hole and reducing the blockage. To minimize blind spots and expand the cleaning range, the drive motor 203 is installed on the outside of the fixed sleeve 201, which can be encased in an outer shell. The through shaft inside the positioning gear 204 passes through the fixed sleeve 201 and extends into it. The through shaft is connected to the fixed sleeve 201 through a bearing seat, ensuring that the positioning gear 204 can only be positioned and rotated inside the fixed sleeve 201. The fixed sleeve 201 has a linear guide groove inside, which forms a sliding pair with the sliders on both sides of the rack 205, allowing the rack 205 to move linearly inside it. The connecting cylinder 206 is fixedly connected to the movable sleeve 209, which passes through the fixed sleeve 201 and extends to its outside.

[0037] Specifically, the outer side of the connecting sleeve 206 is provided with a flip groove 2061, the outer side of the fixed sleeve 201 is fixed with a positioning pin 207, and one end of the positioning pin 207 is located inside the flip groove 2061. The inside of the fixed sleeve 201 is provided with a spring 208, and the spring 208 is sleeved on the outer side of the movable sleeve 209.

[0038] In this embodiment, the positioning pin 207 penetrates the fixed sleeve 201 and extends into it. The positioning pin 207 is positioned on the fixed sleeve 201, with its end located inside the flip groove 2061. The flip groove 2061 is composed of a straight guide groove section and a spiral guide groove section, which are connected. The connecting cylinder 206 has a cylindrical structure, and the spiral guide groove section unfolds 180° around the cylinder. In conjunction with the straight guide groove section, the connecting cylinder 206 can first extend axially when moving, and then turn into a flipping motion with the displacement, thereby causing the moving sleeve 209 to drive the integrated head 3. When the fixed sleeve 201 is flipped from one side to the other side, that is, from the side away from the head 103 to the side closer to the head 103, the drive motor 203 rotates in reverse to drive the moving sleeve 209 back. According to the trajectory set by the flipping groove 2061, the integrated head 3 will first flip from one side of the head 103 to the other side, then reset and rise, and finally stop at the side of the nozzle body 1. At this time, the moving flipping component 2 and the integrated head 3 are retracted to the non-interference position of the head 103, and will not affect its connection with the injection mold.

[0039] Please see Figures 5-9 A nozzle device for a preform injection molding machine includes an integrated head 3 with a linked lifting assembly 4 and a spiral assembly 5. The lifting assembly 4 and the spiral assembly 5 drive a cleaning needle 510 to perform a spiral cleaning action inside the nozzle body 1. The lifting assembly 4 includes a worm gear 403, and an internal gear 404 meshing with it is provided on one side of the worm gear 403. A first spiral rod 405 is connected to the lower part of the internal gear 404, and a matching second spiral rod 407 is provided on one side of the first spiral rod 405. The spiral assembly 5 is installed at the top of the second spiral rod 407, and the top of the internal gear 404... The spiral assembly 5 is equipped with a long gear 412 that drives the spiral assembly 5 to run. The spiral assembly 5 includes a spiral block 501, and a spiral groove 502 is opened inside the spiral block 501. A connecting gear 503 is connected to the bottom end of the spiral block 501, and a transmission gear 504 is arranged below the connecting gear 503. A small diameter gear 506 and a large diameter gear 505 are respectively meshed on one side of the connecting gear 503 and the transmission gear 504. A moving track 507 is arranged above the spiral block 501, and a moving block 508 is movably arranged inside the moving track 507. A cleaning needle 510 is connected to the top of the moving block 508.

[0040] In this embodiment, since the device uses a cleaning structure installed on one side of the nozzle, the size of the device is well controlled. Inside the integrated head 3, only a single drive motor is configured. After being driven, it will simultaneously drive the cleaning needle 510 to perform lifting and spiral movements through the linkage structure. This structure reduces the use of drive sources, thereby reducing the weight and size of the device and ensuring stable operation of the device during nozzle cleaning without affecting the cleaning action.

[0041] Specifically, the lifting assembly 4 includes a cleaning motor 401, and the output end of the cleaning motor 401 is connected to a worm gear 402. The worm gear 402 is located on one side of the worm wheel 403 and meshes with it. The worm wheel 403 includes external teeth 4031, internal teeth 4032 and a ring portion. The external teeth 4031 are located on the outside of the ring portion, the internal teeth 4032 are located inside the ring portion, and the internal teeth 4032 mesh with the internal gear 404. The external teeth 4031 mesh with the worm gear 402. The second spiral rod 407 is located at the center of the worm wheel 403 and passes through the worm wheel 403 and extends to its outside.

[0042] In this embodiment, the structure of the integrated head 3 matches that of the head 103, and a limiting groove is provided inside the integrated head 3 for the worm gear 403 to rotate. The top of the ring of the worm gear 403 is provided with a ball, and a ball groove is provided at the matching position of the limiting groove. The ball groove and the ball can make the worm gear 403 rotate more smoothly inside the integrated head 3. The worm 402 meshes with the external tooth 4031 to form a worm gear pair, so that the lifting component 4 has a self-locking characteristic, and can still maintain stable operation even if the cleaning needle 510 encounters resistance during movement.

[0043] Specifically, a connecting shaft 406 is provided through the interior of the internal gear 404 and the first spiral rod 405, and a lifting shaft 408 is provided through the interior of the second spiral rod 407. Limiting plates 409 and fixing plates 410 are connected to the upper and lower sides of the connecting shaft 406 and the lifting shaft 408. A mounting plate 411 is connected to the top of the lifting shaft 408, and the mounting plate 411 is located at the bottom of the spiral assembly 5. A long gear 412 is connected to the top of the connecting shaft 406, and the long gear 412 is located on one side of the large diameter gear 505 and meshes with it.

[0044] In this embodiment, the first helical rod 405 is disposed on one side of the second helical rod 407, and the teeth of the first helical rod 405 mesh with the teeth of the second helical rod 407. When the first helical rod 405 rotates, its thread teeth will generate an axial component force on the thread teeth of the second helical rod 407 through the meshing action. At this time, the second helical rod 407 is restricted from rotation and only allowed to move axially. This axial component force will push it to move axially, realizing the conversion from rotational motion to linear motion, similar to the transmission principle of a screw and nut. The fixed plate 410 and the limiting plate 409 are the limiting mechanisms that only allow the second helical rod 407 to move axially. A rectangular block is provided on the outer side of the lifting shaft 408. A through groove matching the lifting shaft 408 is provided inside the limiting plate 409 and the fixed plate 410. The through groove includes an annular groove and a rectangular groove. The through groove structure allows the lifting shaft 408 to move through, but does not allow the lifting shaft 408 to rotate. The fixed plate 410 The assembly includes two identical plate structures, with a limiting plate 409 sandwiched between them. A fixing plate 410 is connected to the inner wall of the integrated head 3 to provide support. The limiting plate 409 has two sets of grooves inside, one matching the lifting shaft 408 and the other matching the connecting shaft 406. A convex ring is provided on the outside of the connecting shaft 406. The limiting plate 409 and the convex ring are connected by a bearing, so the limiting plate 409 allows the connecting shaft 406 to rotate inside it, but does not allow the connecting shaft 406 to move axially. The mounting plate 411 is used to mount the spiral assembly 5. The shafts of the transmission gear 504 and the large diameter gear 505 in the spiral assembly 5 are both located on the mounting plate 411 and rotate. The long gear 412 is relatively long, so when the spiral assembly 5 moves up and down with the second spiral rod 407, the large diameter gear 505 will also maintain a meshing relationship with the long gear 412 to maintain the transmission relationship. The length of the long gear 412 meets the movement distance of the spiral assembly 5.

[0045] Specifically, the transmission gear 504 has a first rotating shaft inside, which passes through the spiral block 501 and is connected to the moving track 507. A bearing is provided between the connecting gear 503 and the first rotating shaft. The large diameter gear 505 has a second rotating shaft inside, and the large diameter gear 505 and the small diameter gear 506 are coaxial. The transmission gear 504 and the large diameter gear 505 mesh with each other.

[0046] In this embodiment, the spiral block 501 has a spiral structure, also known as an Archimedean spiral. The spiral block 501 and the connecting gear 503 below it are integrally formed. When the connecting gear 503 rotates, it drives the spiral block 501 to rotate. The connecting gear 503 is a large-diameter gear that meshes with the small-diameter gear 506, while the transmission gear 504 is a small-diameter gear that meshes with the large-diameter gear 505. When the transmission gear 504 is driven by the large-diameter gear 505, it drives the moving track 507 to rotate through the first rotating shaft, while the connecting gear 503 is driven by the small-diameter gear 506. After the gear 506 drives the spiral groove 502 to rotate, the spiral block 501 and the moving track 507 do not rotate synchronously due to their different diameters. Only when the limiting pin 509 inside the spiral groove 502 is engaged can the cleaning needle 510 make a spiral motion. This spiral motion simulates the action of an operator using a tool to make an involute motion inside the head 103 to crush hard objects in the injection cavity 104. With the lifting component 4, the hard objects blocking the injection cavity 104 can be gradually decomposed, thus cleaning the injection cavity 104.

[0047] Specifically, a moving groove is provided at the bottom of the moving track 507, and a limiting pin 509 matching the moving groove is provided at the bottom of the moving block 508. The limiting pin 509 passes through the moving track 507 and is located inside the spiral groove 502.

[0048] In this embodiment, the movable block 508 is movably disposed inside the movable track 507. The special trapezoidal fit makes the movable block 508 anti-detachment and prevents it from separating from the movable track 507. The cleaning needle 510 adopts a metal needle-like structure with a small diameter, which allows it to enter the injection cavity 104 and move spirally inside it. The diameter can be determined according to the nozzle body 1 with different inner diameter channels, and its length is determined according to the on-site usage. The cleaning needle 510 and the movable block 508 are connected in a detachable manner. When the cleaning needle 510 wears out after a period of use, it can be removed and replaced. If the inside of the injection cavity 104 is blocked by hard materials that are difficult to clean and break due to the material, a micro motor can be added to the bottom of the cleaning needle 510 to drive the cleaning needle 510 to rotate or vibrate, thereby increasing the breaking force on the hard materials and enhancing the cleaning effect.

[0049] When in use, an external power supply is required to provide power to the device so that it can operate normally. First, start the drive motor 203, which drives the positioning gear 204 to rotate. The positioning gear 204 drives the rack 205 to move linearly. The rack 205 pushes out the connecting cylinder 206 and the moving sleeve 209. During the movement of the connecting cylinder 206, the positioning pin 207 limits the movement, causing the moving sleeve 209 to push out and flip. The moving sleeve 209 drives the integrated head 3 to flip 180 degrees to the side of the head 103.

[0050] The cleaning motor 401 is started, causing it to drive the worm gear 402 to rotate. The worm gear 402 drives the worm wheel 403 to rotate, and the worm wheel 403 drives the internal gear 404 to rotate via the internal teeth 4032. The internal gear 404 drives the first spiral rod 405, the connecting shaft 406, and the long gear 412 to rotate. The connecting shaft 406 drives the second spiral rod 407, which meshes with it, to move up and down. While the second spiral rod 407 is moving up and down, it drives the spiral assembly 5 to move up and down synchronously via the lifting shaft 408 and the mounting plate 411. Meanwhile, the rotating long gear 412 drives the large diameter gear 505 to rotate, and the large diameter gear 505 drives the small diameter gear 506 to rotate. The large diameter gear 505 meshes with the transmission gear 504, thus driving the transmission gear 504 to rotate. The first rotating shaft inside the transmission gear 504 passes through the spiral block 501, driving the moving track 507 to rotate, while the small diameter gear 506... The radial gear 506 drives the meshing connecting gear 503 to rotate, and the connecting gear 503 drives the spiral block 501 to rotate. When the spiral block 501 rotates, the spiral groove 502 opened on it rotates synchronously, and at the same time, it drives the limiting plate 409, which is limited inside the spiral groove 502, to move. The limiting pin 509 moves inside the moving track 507. The axial movement and circumferential rotation combine to form a spiral trajectory, so that the cleaning needle 510 rotates spirally. The cleaning needle 510 enters the injection cavity 104 from the head 103. The spiral action breaks up the cooling material blocking the injection cavity 104. With the lifting action, it can gradually penetrate into the injection cavity 104 to perform a large-scale and deep cleaning action. After the cooling material in the injection cavity 104 is broken up, the material no longer blocks the injection cavity 104, ensuring smooth injection next time.

[0051] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made to these embodiments without departing from the principles and spirit of this application. The scope of this application is defined by the appended claims and their equivalents.

Claims

1. A nozzle device for a preform injection molding machine, comprising a nozzle body (1), characterized in that: A movable flipping assembly (2) is installed on the outside of the nozzle body (1), and an integrated head (3) is connected to one end of the movable flipping assembly (2). A linkage lifting assembly (4) and a spiral assembly (5) are installed inside the integrated head (3). The lifting assembly (4) and the spiral assembly (5) are used to drive the cleaning needle (510) to perform a spiral cleaning action of lifting and lowering inside the nozzle body (1). The lifting assembly (4) includes a worm gear (403), and an internal gear (404) meshing with it is provided on one side of the worm gear (403). A first spiral rod (405) is connected below the internal gear (404), and a second spiral rod (407) matching it is provided on one side of the first spiral rod (405). A spiral assembly (5) is installed at the top of the second spiral rod (407), and a long gear (412) that drives the spiral assembly (5) to run is installed at the top of the internal gear (404). The spiral assembly (5) includes a spiral block (501), and a spiral groove (502) is provided inside the spiral block (501). A connecting gear (503) is connected to the bottom end of the spiral block (501), and a transmission gear (504) is provided below the connecting gear (503). A small diameter gear (506) and a large diameter gear (505) are respectively meshed on one side of the connecting gear (503) and the transmission gear (504). A moving track (507) is provided above the spiral block (501), and a moving block (508) is movably provided inside the moving track (507). A cleaning needle (510) is connected to the top end of the moving block (508). A moving groove is provided at the bottom end inside the moving track (507), and a limiting pin (509) matching the moving groove is provided at the bottom end of the moving block (508). The limiting pin (509) passes through the moving track (507) and is located inside the spiral groove (502).

2. The nozzle device for a preform injection molding machine according to claim 1, characterized in that: The nozzle body (1) includes a detachable first nozzle (101) and a second nozzle (102), and the bottom end of the second nozzle (102) is connected to a head (103). The first nozzle (101), the second nozzle (102) and the head (103) are all provided with injection cavities (104).

3. The nozzle device for a preform injection molding machine according to claim 1, characterized in that: The movable flipping assembly (2) includes a fixed sleeve (201), and a mounting ring (202) is connected to one side of the fixed sleeve (201). The mounting ring (202) is installed on the outside of the nozzle body (1). A drive motor (203) is installed on one side of the fixed sleeve (201), and a positioning gear (204) is connected to the output end of the drive motor (203). A rack (205) meshes with one side of the positioning gear (204), and a connecting cylinder (206) is provided at the bottom end of the rack (205). A movable sleeve (209) is connected to the bottom end of the connecting cylinder (206), and an integrated head (3) is installed at one end of the movable sleeve (209).

4. The nozzle device for a preform injection molding machine according to claim 3, characterized in that: The outer side of the connecting cylinder (206) is provided with a flip groove (2061), and the outer side of the fixed sleeve (201) is fixed with a positioning pin (207), and one end of the positioning pin (207) is located inside the flip groove (2061). The inside of the fixed sleeve (201) is provided with a spring (208), and the spring (208) is sleeved on the outer side of the movable sleeve (209).

5. The nozzle device for a preform injection molding machine according to claim 1, characterized in that: The lifting assembly (4) includes a cleaning motor (401), and the output end of the cleaning motor (401) is connected to a worm (402). The worm (402) is located on one side of the worm wheel (403) and meshes with it. The worm wheel (403) includes an external tooth (4031), an internal tooth (4032), and a ring. The external tooth (4031) is located on the outside of the ring. The internal tooth (4032) is located inside the ring. The internal tooth (4032) meshes with the internal gear (404). The external tooth (4031) meshes with the worm (402). The second spiral rod (407) is located at the center of the worm wheel (403). The second spiral rod (407) passes through the worm wheel (403) and extends to its outside.

6. The nozzle device for a preform injection molding machine according to claim 1, characterized in that: A connecting shaft (406) is provided through the interior of the internal gear (404) and the first spiral rod (405). A lifting shaft (408) is provided through the interior of the second spiral rod (407). Limiting plates (409) and fixing plates (410) are connected to the upper and lower sides of the connecting shaft (406) and the lifting shaft (408). A mounting plate (411) is connected to the top of the lifting shaft (408), and the mounting plate (411) is located at the bottom of the spiral assembly (5). A long gear (412) is connected to the top of the connecting shaft (406), and the long gear (412) is located on one side of the large diameter gear (505) and meshes with it.

7. The nozzle device for a preform injection molding machine according to claim 1, characterized in that: The transmission gear (504) has a first rotating shaft inside, and the first rotating shaft passes through the spiral block (501) and is connected to the moving track (507). A bearing is provided between the connecting gear (503) and the first rotating shaft. The large diameter gear (505) has a second rotating shaft inside, and the large diameter gear (505) and the small diameter gear (506) are coaxial. The transmission gear (504) and the large diameter gear (505) mesh with each other.

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