Needle valve type side entry glue hot nozzle

Abstract

The application provides a needle valve type side glue inlet hot nozzle, which comprises a distribution block, a plurality of branch flow channels are arranged in the distribution block, a plurality of hot nozzles, one end of each hot nozzle is located in the distribution block and communicates with one corresponding branch flow channel, and the other end of each hot nozzle extends to the outside of the distribution block along the radial direction of the distribution block, a plurality of valve needles, each valve needle is coaxially arranged in the hot nozzle corresponding to the valve needle, and a driving wheel assembly which is connected with the distribution block and the plurality of valve needles, under the reciprocating rotation state of the driving wheel assembly, each valve needle slides close to or away from the gate of the hot nozzle corresponding to the valve needle to open and close the injection fluid in the hot nozzle, and in the operation process, the reciprocating sliding of the plurality of valve needles is driven by the rotation of the driving wheel assembly, the opening and closing of the gate position of the side glue inlet hot nozzle is realized, and the product processing effect is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of injection molding, in particular to a needle valve type side feeding hot nozzle. BACKGROUND

[0002] Hot Runner Systems is a heating assembly system used in injection molding molds to inject melted plastic particles into the mold cavity; in the prior art, for products with small mold cavities, the product is only allowed to be fed from the side during injection molding.

[0003] However, although the ordinary open side feeding hot nozzle can feed from the side, it does not have a valve needle structure, which causes the product feeding port position to be prone to stringing and difficult to control the on-off of the side feeding gate position; therefore, a needle valve type side feeding hot nozzle is urgently needed. SUMMARY

[0004] The present application aims to provide a needle valve type side feeding hot nozzle to solve the problem of the on-off of the feeding port of the ordinary open side feeding hot nozzle being difficult to control mentioned in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solution: a needle valve type side feeding hot nozzle, comprising: a flow divider having a plurality of branch flow channels inside; a plurality of hot nozzles, one end of which is located inside the flow divider and communicates with one-to-one branch flow channels, and the other end extends to the outside of the flow divider along the radial direction of the flow divider; a plurality of valve needles corresponding to the hot nozzles and coaxially arranged inside the hot nozzles; a drive wheel assembly connected to the flow divider and the plurality of valve needles, under the reciprocating rotation state of the drive wheel assembly, the plurality of valve needles are slid close to or away from the gate of the corresponding hot nozzle to turn on or off the injection fluid in the hot nozzle.

[0006] Optionally, the drive wheel assembly comprises: coaxially distributed drive wheel cover plates and drive wheel bases, which are respectively fixedly connected to the flow divider, the drive wheel cover plates are radially divergent and have a plurality of strip-shaped limiting holes, and the drive wheel bases are radially divergent and have a plurality of limiting holes; a drive wheel rotatably arranged between the drive wheel cover plates and the drive wheel bases, the drive wheel is radially divergent and has a plurality of arc-shaped limiting holes; a pin column which is in sliding fit and one-to-one correspondence with the arc-shaped limiting holes, the strip-shaped limiting holes and the limiting holes.

[0007] Optionally, one end of the valve needle away from the gate of the hot nozzle is fixedly connected with a valve needle connecting part, and the valve needle connecting part is sleeved outside the pin column.

[0008] Optionally, further comprising: a connecting plate fixedly connected with the flow distribution block, the connecting plate being provided with a gear mounting groove and a rack mounting hole, the rack mounting hole being tangentially communicated with the gear mounting groove; a gear located inside the gear mounting groove and fixedly connected with the drive wheel coaxially through a gear rotating shaft; and a rack slidingly arranged inside the rack mounting hole and engaged with the gear.

[0009] Optionally, the drive wheel is axially provided with a drive wheel rotating shaft, one end of the drive wheel rotating shaft being rotatably connected with the drive wheel base, and the other end being fixedly connected with the gear rotating shaft.

[0010] Optionally, one end of the drive wheel rotating shaft, away from the drive wheel base, is provided with a drive wheel connecting hole, and the other end of the gear rotating shaft, away from the gear mounting groove, is fixedly provided with a gear connecting head, the drive wheel connecting hole being detachably connected with the gear connecting head.

[0011] Optionally, the top of the flow distribution block is provided with a main flow channel connecting groove, the flow distribution block is radially provided with a plurality of hot nozzle mounting cavities, the main flow channel connecting groove is communicated with a plurality of branch flow channels, the plurality of branch flow channels are distributed in a diverging manner along the radial direction of the flow distribution block and are bent to be communicated to the corresponding hot nozzle mounting cavities, one end of the branch flow channel, close to the hot nozzle mounting cavity, is provided with a hot nozzle connecting part, the hot nozzle is connected with the hot nozzle connecting part, and the valve needle is sealingly and slidingly matched with the corresponding branch flow channel.

[0012] Optionally, the hot nozzle comprises: a nozzle tip, one end of which is detachably connected with the corresponding hot nozzle connecting part, and the other end of which extends to the outside of the flow distribution block; a pressing cap, which is sleeved on the outside of the nozzle tip and sealingly matched with the hot nozzle mounting cavity; and a heat insulation cap, which is detachably connected to one end of the pressing cap, away from the nozzle tip.

[0013] Optionally, the drive wheel base is integrally connected with the flow distribution block, and the drive wheel cover plate and the drive wheel are detachably connected.

[0014] Optionally, the flow distribution block is provided with heating element mounting grooves, the heating element mounting grooves being uniformly distributed on the outside of the flow distribution block and close to the plurality of hot nozzles.

[0015] Compared with the prior art, the present application has the following advantages:

[0016] In the present application, the drive wheel assembly is provided and connected with the flow distribution block and the plurality of valve needles, under the reciprocating rotation state of the drive wheel assembly, the plurality of valve needles are slidingly close to or away from the sprue of the corresponding hot nozzle to turn on or off the injection fluid in the hot nozzle; in the operation process, the drive wheel assembly is rotated to drive the plurality of valve needles to reciprocally slide, the position of the sprue of the side injection hot nozzle is turned on or off, and the product processing effect is improved. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the front structure of the present invention.

[0018] Figure 2 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 3 This is a schematic diagram of the assembly structure of the flow divider block and drive wheel assembly of the present invention.

[0020] Figure 4 This is a schematic diagram of the disassembled structure of the flow divider block and drive wheel assembly of the present invention.

[0021] Figure 5 This is a schematic diagram of the hot nozzle and valve needle structure of the present invention.

[0022] Figure 6 This is a schematic diagram of the three-dimensional structure of the rack of the present invention.

[0023] Figure 7 This is a schematic diagram of the three-dimensional structure of the gear of the present invention.

[0024] Figure 8 This is a three-dimensional structural diagram of the drive wheel cover plate of the present invention.

[0025] Figure 9 This is a schematic diagram of the three-dimensional structure of the drive wheel of the present invention.

[0026] Figure 10 This is a bottom view of the drive wheel of the present invention.

[0027] Figure 11 This is a schematic diagram of the disassembled structure of the hot nozzle of the present invention.

[0028] Figure 12 This is a schematic diagram of the three-dimensional structure of the connecting plate of the present invention.

[0029] Figure 13 This is a schematic diagram of the first three-dimensional structure of the diversion block of the present invention.

[0030] Figure 14 This is a schematic diagram of the second three-dimensional structure of the diversion block of the present invention.

[0031] In the figure: 1- connecting plate, 101- gear installation slot, 102- rack installation hole, 103- connecting plate rotating shaft hole, 104- connecting plate positioning hole, 2- flow distribution block, 201- hot nozzle installation cavity, 202- valve needle installation hole, 203- through hole, 204- limiting hole, 205- cover plate installation slot, 206- locking hole, 207- positioning hole, 208- fixing hole, 209- heating element installation slot, 210- temperature sensing head installation slot, 211- main flow channel connecting slot, 212- branch flow channel, 3- rack, 301- connecting position, 302- meshing position, 4- gear, 401- meshing tooth, 402- gear rotating shaft, 403- gear connecting head, 5- drive wheel cover plate, 501- cover plate through hole, 502- strip-shaped limiting hole, 503- cover plate locking hole, 6- drive wheel, 601- arc-shaped limiting hole, 602- drive wheel rotating shaft, 603- drive wheel connecting hole, 7- hot nozzle, 701- nozzle tip, 702- pressing cap, 703- heat insulation cap, 8- valve needle, 801- valve needle connecting part, 9- pin column, 10- positioning member, 11- locking member. DETAILED DESCRIPTION

[0032] The scheme of the present application will be clearly and completely explained in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0033] It should be noted that the terms “first”, “second”, and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented. In addition, the terms “include” and “have” and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0034] In the present application, the terms “up”, “down”, “left”, “right”, “front”, “back”, “top”, “bottom”, “inner”, “outer”, “middle”, “vertical”, “horizontal”, “lateral”, “longitudinal”, and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0035] Moreover, the above-mentioned terms can be used to represent other meanings in addition to the positional or positional relationship, for example, the term "upper" can also be used to represent a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances.

[0036] In addition, the terms "mounting", "setting", "provided with", "connecting", "connecting", "sleeving" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally configured; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, or it can be internal communication between two devices, elements or components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0037] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0038] Please refer to Figure 1 - Figure 2 The needle valve type side glue hot nozzle of the present application comprises: a flow dividing block 2, a plurality of branch flow channels 212 are formed in the inside of the flow dividing block 2; a plurality of hot nozzles 7, one end of each hot nozzle is located in the inside of the flow dividing block 2 and communicates with a corresponding branch flow channel 212, and the other end of each hot nozzle extends to the outside of the flow dividing block 2 along the radial direction of the flow dividing block 2; a plurality of valve needles 8, each valve needle corresponds to a hot nozzle 7 and is coaxially arranged in the inside of the hot nozzle 7; a drive wheel assembly, which is connected with the flow dividing block 2 and the plurality of valve needles 8, under the reciprocating rotation state of the drive wheel assembly, each valve needle 8 slides towards or away from the gate of the corresponding hot nozzle 7 to open or close the injection fluid in the hot nozzle 7.

[0039] Specifically, the flow dividing block 2 is a cylindrical body, which can be a polygonal prism or a circular cylinder. In this application, the flow dividing block 2 is placed horizontally and the two circular surfaces are arranged in the upper and lower layers, respectively. A main flow channel connecting groove 211 is formed at the top of the flow dividing block 2, and a plurality of branch flow channels 212 are formed in the inside of the flow dividing block 2. The main flow channel connecting groove 211 and the plurality of branch flow channels 212 are in communication, which can uniformly distribute the injection fluid in the main flow channel to each branch flow channel 212, thereby improving the processing efficiency and improving the product processing effect.

[0040] It can be understood that by setting the driving wheel assembly, which is respectively connected with the flow distribution block and the plurality of valve needles, under the reciprocating rotation state of the driving wheel assembly, the plurality of valve needles are all slid close to or away from the gate of the hot nozzle corresponding thereto to open and close the injection fluid in the hot nozzle; in the operation process, the driving wheel assembly is rotated to drive the plurality of valve needles 8 to reciprocally slide, the opening and closing of the gate position of the side glue feeding hot nozzle are realized, and the product processing effect is improved.

[0041] Please refer to Figure 3 - Figure 4 In one embodiment of the present application, the driving wheel assembly comprises: coaxially distributed driving wheel cover plate 5 and driving wheel base, which are respectively fixedly connected with the flow distribution block 2, the driving wheel cover plate 5 is distributed with a plurality of strip-shaped limiting holes 502 along the radial direction, and the driving wheel base is distributed with a plurality of limiting holes 204 along the radial direction; driving wheel 6, which is rotationally arranged between the driving wheel cover plate 5 and the driving wheel base, is distributed with a plurality of arc-shaped limiting holes 601 along the radial direction; pin column 9, which is in sliding fit with the arc-shaped limiting holes 601, the strip-shaped limiting holes 502 and the limiting holes 204 one by one.

[0042] Specifically, the driving wheel cover plate 5 and the driving wheel base are distributed in a stacked manner, the strip-shaped limiting holes 502 and the limiting holes 204 are in consistent shape and parallel distribution to limit the pin column 9, so that the pin column 9 reciprocally slides along the strip-shaped limiting holes 502 and the limiting holes 204; the arc-shaped limiting holes 601 are located between the strip-shaped limiting holes 502 and the limiting holes 204, when the driving wheel 6 rotates, a part of the arc-shaped limiting holes 601 coincides with the strip-shaped limiting holes 502 and the limiting holes 204, so that when the driving wheel 6 rotates, the arc-shaped limiting holes 601 can push the pin column 9 to reciprocally slide along the inner wall of the strip-shaped limiting holes 502 and the limiting holes 204, and this driving mode can set any number of limiting holes, such as two, three, four, five, six limiting holes or even more, so that the driving wheel assembly can drive the plurality of valve needles 8 to reciprocally slide, and further can set a plurality of side glue feeding hot nozzles, greatly improving the production efficiency; and the transmission mode structure of the driving wheel assembly is compact, relatively stable, has low wear rate and greatly improves the service life.

[0043] Please refer to Figure 4 - Figure 5 In one embodiment of the present application, the valve needle 8 is fixedly connected with a valve needle connecting portion 801 at one end away from the gate of the hot nozzle 7, and the valve needle connecting portion 801 is sleeved on the outer side of the pin column 9.

[0044] Specifically, the valve needle connecting part 801 can be fixedly sleeved on the outer side of the pin column 9, or can be movably sleeved on the outer side of the pin column 9. In order to facilitate disassembly, the assembly form of movable sleeving can be selected.

[0045] Please refer to Figure 6 , Figure 7 and Figure 12 , one of the embodiments of the application further comprises: a connecting plate 1 fixedly connected with the flow distribution block 2, the connecting plate 1 is provided with a gear mounting groove 101 and a rack mounting hole 102, the rack mounting hole 102 is tangentially communicated with the gear mounting groove 101; a gear 4 located inside the gear mounting groove 101 and coaxially fixedly connected with the drive wheel 6 through a gear shaft 402; a rack 3 slidingly arranged inside the rack mounting hole 102 and engaged with the gear 4.

[0046] Specifically, through the cooperation transmission form of the gear 4 and the rack 3, the rotation angle of the gear 4 can be limited by providing different numbers of engagement positions 302 on the rack, thereby limiting the sliding distance of the pin column 9, so as to avoid relative interference between the drive wheel cover plate 5, the drive wheel 6, the drive wheel base and the pin column 9, and to avoid large wear or damage of the core components in the drive wheel assembly; by providing the gear mounting groove 101 and the rack mounting hole 102 in the connecting plate 1, the rack mounting hole 102 is tangentially communicated with the gear mounting groove 101, which can make the connection of the gear 4 and the rack 3 more stable, avoid the failure to operate due to misalignment of the engagement part, and greatly improve the stability and service life.

[0047] More specifically, the number of engagement positions 302 provided on the rack 3 can control the sliding distance of the valve needle, the cross section of the engagement position 302 gradually expands from the inside to the outside of the rack 3, so that the rack 3 can be more smooth during the engagement process with the gear 4; the end of the rack away from the engagement position 302 is also provided with a connecting position 301, the connecting position 301 can be detachably connected with an external power device including a pneumatic cylinder or an oil cylinder, the connecting position 301 includes a clamping part and a limiting part, so that the rack 3 is more stable when clamped with the output end of the external power device inside the connecting plate 1, and the disassembly is convenient, which greatly improves the assembly efficiency and stability.

[0048] Please refer to Figure 8 , Figure 9 and Figure 10 , one of the embodiments of the application, the drive wheel 6 is axially provided with a drive wheel shaft 602, one end of the drive wheel shaft 602 is rotatably connected with the drive wheel base, and the other end is fixedly connected with the gear shaft 402.

[0049] Specifically, a through hole 203 is formed at the center of the driving wheel base, a cover plate through hole 501 is formed at the center of the driving wheel cover plate 5, and the two ends of the driving wheel rotating shaft 602 on the driving wheel 6 are rotatably connected to the through hole 203 and the cover plate through hole 501, so that the driving wheel 6 can stably rotate. One end of the driving wheel rotating shaft 602 away from the driving wheel base is fixedly connected to the gear rotating shaft 402, and under the driving of the gear 4, the driving wheel 6 can stably rotate between the driving wheel cover plate 5 and the driving wheel base.

[0050] It can be understood that the driving wheel rotating shaft 602 can be connected to other transmission members in a rotating form, as long as the appropriate reciprocating rotation angle can be controlled, and the reciprocating rotation of the driving wheel 6 can avoid mutual interference of internal components in the driving wheel assembly. Since the reciprocating movement of the valve needle 8 is mainly controlled by the cylinder in the hot runner system, the application can greatly reduce the production cost by the transmission form of the gear 4, the rack 3 and the connecting plate 1, and has better stability. Among the various transmission members, the gear 4, the rack 3 and the connecting plate 1 are placed outside the equipment as wear parts, which can be more convenient to replace, and the processing difficulty is simple, which can more reasonably control the production cost.

[0051] Please refer to Figure 7 , Figure 9 and Figure 10 , one end of the driving wheel rotating shaft 602 away from the driving wheel base is provided with a driving wheel connecting hole 603, and the other end of the gear rotating shaft 402 away from the gear mounting groove 101 is fixedly provided with a gear connecting head 403. The driving wheel connecting hole 603 and the gear connecting head 403 are detachably connected.

[0052] Specifically, the gear connecting head 403 is in the shape of a wrench, and the driving wheel connecting hole 603 is in the shape of a sleeve. In the application, the gear connecting head 403 is a hexagonal wrench, and the driving wheel connecting hole 603 is a hexagonal sleeve matched therewith, which can stably drive the driving wheel 6 to reciprocate and is relatively simple to assemble and disassemble.

[0053] Please refer to Figure 13 and Figure 14In one of the embodiments of the present application, the top of the flow distribution block 2 is provided with a main flow channel connecting groove 211, and a plurality of hot nozzle mounting cavities 201 are radially provided in the flow distribution block 2. The main flow channel connecting groove 211 is in communication with a plurality of branch flow channels 212. The branch flow channels 212 are distributed in a radial direction of the flow distribution block 2 and are bent to be communicated to the corresponding hot nozzle mounting cavities 201. The branch flow channels 212 are provided with hot nozzle connecting portions at one end close to the hot nozzle mounting cavities 201. The hot nozzles 7 are connected to the hot nozzle connecting portions. The valve needles 8 are sealingly and slidably connected to the corresponding branch flow channels 212.

[0054] Specifically, the end of the flow distribution block 2 away from the main flow channel connecting groove 211 is provided with a cover plate mounting groove 205. A valve needle mounting chamber is provided in the middle of the cover plate mounting groove 205. The valve needle mounting chamber is used for mounting the valve needle 8, the driving wheel 6 and the pin column 9. A valve needle mounting hole 202 is provided in the side wall of the valve needle mounting chamber. The valve needle 8 penetrates through the valve needle mounting hole and is sealingly and slidably connected to the branch flow channel 212 through a sealing member. The cover plate mounting groove 205 is also provided with a plurality of locking holes 206 and positioning holes 207. The driving wheel cover plate 5 is locked and positioned with the cover plate mounting groove 205 through a locking member 11 and a positioning member 10. The branch flow channels 212 are distributed in a radial direction of the flow distribution block 2 and are bent to the bottom outside the valve needle mounting chamber and are communicated to the corresponding hot nozzle mounting cavities 201. The whole needle valve type side glue feeding hot nozzle device has a compact and stable structure and has a very high efficiency.

[0055] Please refer to Figure 11 In one of the embodiments of the present application, the hot nozzle 7 comprises a nozzle tip 701. One end of the nozzle tip 701 is detachably connected to the corresponding hot nozzle connecting portion. The other end of the nozzle tip 701 extends to the outside of the flow distribution block 2. A pressing cap 702 is sleeved on the outside of the nozzle tip 701 and is sealingly connected to the hot nozzle mounting cavity 201. A heat insulation cap 703 is detachably connected to the end of the pressing cap 702 away from the nozzle tip 701.

[0056] Specifically, in order to improve the sealing performance, the nozzle tip 701 is fixedly connected to the hot nozzle connecting portion on the branch flow channel 212. The pressing cap 702 is sealingly connected to the hot nozzle mounting cavity 201, thereby greatly improving the sealing effect.

[0057] Please refer to Figure 4 In one of the embodiments of the present application, the driving wheel base is integrally connected to the flow distribution block 2. The driving wheel cover plate 5 and the driving wheel 6 are detachably connected.

[0058] Specifically, since the driving wheel assembly needs to be aligned with the valve needle 8 and the valve needle mounting hole 202 during installation, the application integrally connects the driving wheel base with the flow distribution block 2, which facilitates the production and processing of the flow distribution block 2 and enables the driving wheel base to be used as a reference for installing the driving wheel 6 and the driving wheel cover plate 5, greatly improving the assembly efficiency.

[0059] Please refer to Figure 3 , Figure 13 and Figure 14 , one of the embodiments of the application, the flow distribution block 2 is provided with a heating element mounting groove 209, which is uniformly distributed on the outer side of the flow distribution block 2 and close to the plurality of hot nozzles 7.

[0060] Specifically, the heating element mounting groove 209 is located on the outer side of the flow distribution block 2 and close to each of the hot nozzles 7, and is extended in a serpentine shape to be uniformly distributed around each of the hot nozzles, thereby providing stable and uniform heating effect for each hot nozzle and avoiding uneven glue output.

[0061] More specifically, in the application, the heating element mounting groove 209 is arranged circumferentially around the bottom of the flow distribution block 2 and is extended in a serpentine shape, and a heating wire is installed inside the heating element mounting groove 209 to be uniformly distributed around each of the hot nozzles, thereby stably heating a plurality of side glue feeding hot nozzle devices and avoiding uneven glue output.

[0062] Please refer to Figure 13 , one of the embodiments of the application, the flow distribution block 2 is also provided with a temperature sensing head mounting groove 210 for installing the temperature sensing head of the temperature sensing wire, which can monitor the temperature of the hot nozzle 7 in real time to better control the temperature.

[0063] Specifically, the temperature sensing head mounting groove 210 is provided on the top of the flow distribution block 2 close to the outer side, which can monitor the temperature of the hot nozzle 7 in real time to avoid the problem that the molten plastic cannot flow due to insufficient temperature, and also avoid the problems of power waste and production of defective products caused by excessive temperature.

[0064] The above is only an embodiment of the application, and does not limit the patent scope of the application, and any equivalent transformation or direct or indirect application in related technical fields based on the content of the application specification and drawings is also included in the patent protection scope of the application.

Claims

1. A needle valve side-entry glue hot tip, characterized by, The utility model relates to a kind of injection molding machine, including: The shunt block (2) is internally opened multiple branch flow passages (212); Multiple hot nozzles (7) are located in the shunt block (2) and are communicated with the branch flow passage (212) one by one, and the other end extends to the outside of the shunt block (2) along the radial direction of the shunt block (2); Multiple valve needles (8) are coaxially arranged in the hot nozzle (7) and correspond to the hot nozzle (7) one by one; The drive wheel assembly is connected with the shunt block (2) and the valve needle (8), and under the reciprocating rotation state of the drive wheel assembly, the valve needle (8) is close to or away from the gate of the hot nozzle (7) to open or close the injection fluid in the hot nozzle (7); The drive wheel assembly includes a coaxially distributed drive wheel cover plate (5) and a drive wheel base, which are fixedly connected with the shunt block (2), and the drive wheel cover plate (5) is distributed with multiple strip-shaped limiting holes (502) along the radial direction, and the drive wheel base is distributed with multiple limiting holes (204) along the radial direction; The drive wheel (6) is rotatably arranged between the drive wheel cover plate (5) and the drive wheel base, and the drive wheel (6) is distributed with multiple arc-shaped limiting holes (601) along the radial direction; The pin column (9) is slidably matched with the arc-shaped limiting hole (601), the strip-shaped limiting hole (502) and the limiting hole (204) one by one.

2. The needle valve side-feed glue hot-melt nozzle according to claim 1, wherein, The valve needle (8) is fixedly connected with a valve needle connecting portion (801) at the end away from the gate of the hot nozzle (7), and the valve needle connecting portion (801) is sleeved on the outside of the pin column (9).

3. The needle valve side-feed glue hot-melt nozzle of claim 1, wherein, Further including: The connecting plate (1) is fixedly connected with the shunt block (2), and the connecting plate (1) is provided with a gear mounting groove (101) and a rack mounting hole (102), and the rack mounting hole (102) is tangentially communicated with the gear mounting groove (101); The gear (4) is located in the gear mounting groove (101) and is fixedly connected with the drive wheel (6) coaxially through a gear rotating shaft (402); The rack (3) is slidably arranged in the rack mounting hole (102) and is engaged with the gear (4).

4. The needle valve side-feed glue hot-melt nozzle of claim 3, wherein, The drive wheel (6) is axially provided with a drive wheel rotating shaft (602), one end of the drive wheel rotating shaft (602) is rotatably connected with the drive wheel base, and the other end is fixedly connected with the gear rotating shaft (402).

5. The needle valve side-feed glue hot-melt nozzle of claim 4, wherein, The drive wheel rotating shaft (602) is provided with a drive wheel connecting hole (603) at the end away from the drive wheel base, the gear rotating shaft (402) is fixedly provided with a gear connecting head (403) at the end away from the gear mounting groove (101), and the drive wheel connecting hole (603) is detachably connected with the gear connecting head (403).

6. The needle valve side-feed glue hot-melt nozzle of claim 1, wherein, The top of the flow distribution block (2) is provided with a main flow channel connecting groove (211), the flow distribution block (2) is radially provided with a plurality of hot nozzle mounting cavities (201), the main flow channel connecting groove (211) is communicated with a plurality of branch flow channels (212), the plurality of branch flow channels (212) are distributed and bent to communicate to the corresponding hot nozzle mounting cavities (201) along the radial direction of the flow distribution block (2), the branch flow channel (212) is provided with a hot nozzle connecting portion at one end close to the hot nozzle mounting cavity (201), the hot nozzle (7) is connected with the hot nozzle connecting portion, and the valve needle (8) is sealingly and slidably connected with the corresponding branch flow channel (212).

7. The needle valve side-feed glue hot-melt nozzle of claim 6, wherein, The hot nozzle (7) comprises: a nozzle tip (701) which is detachably connected at one end with the corresponding hot nozzle connecting portion and extends to the outside of the flow distribution block (2) at the other end; a pressing cap (702) which is sleeved on the outside of the nozzle tip (701) and sealingly cooperates with the hot nozzle mounting cavity (201); a heat insulation cap (703) which is detachably connected at one end away from the nozzle tip (701) with the pressing cap (702).

8. The needle valve side-feed glue hot-melt nozzle of claim 1, wherein, The drive wheel base is integrally connected with the flow distribution block (2), and the drive wheel cover plate (5) and the drive wheel (6) are detachably connected.

9. The needle valve side-feed glue hot-melt nozzle of claim 1, wherein, The flow distribution block (2) is provided with a heating element mounting groove (209), and the heating element mounting grooves (209) are uniformly distributed on the outside of the flow distribution block (2) and are close to the plurality of hot nozzles (7).

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