Special glue dripping machine for bottle caps
By designing a special dispensing machine for bottle caps, and utilizing heating melting and rotary molding technology, a seamless combination of adhesives inside the bottle caps is achieved, solving the problems of sealing and cost, and improving production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU RIJING AUTOMATION MACHINERY CO LTD
- Filing Date
- 2025-05-14
- Publication Date
- 2026-04-17
AI Technical Summary
Existing bottle cap seals use gaskets made of hard materials or that are prone to falling off, which increases costs and provides insufficient sealing. In particular, the design of multi-layer gaskets complicates the production process.
Design a special dispensing machine for bottle caps. The dispensing machine heats and melts the adhesive through an adhesive delivery device, and uses a scraper and air tube to help the adhesive enter the bottle cap. Combined with a rotating disc and a molding device, it achieves a seamless combination of the adhesive and the bottle cap, and quickly sets the shape.
It enables efficient and low-cost assembly of bottle caps with good sealing properties, simplifies the production process, improves production efficiency, and reduces costs.
Smart Images
Figure CN224127669U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automated production and processing equipment, and in particular to a special dispensing machine for bottle caps. Background Technology
[0002] Bottle caps are a common type of sealing component. When a bottle cap is fitted to a bottle body, a gasket is usually added inside the cap to enhance the seal. However, the gasket material is often too hard, or it is prone to falling off the cap after a period of use. Moreover, because the two sides of the gasket require different properties, some products even require two layers, which significantly increases costs. Therefore, there is an urgent need to design a low-cost sealing component with good sealing performance. Utility Model Content
[0003] This utility model proposes a bottle cap dispensing machine that is simple in structure, highly efficient, and has good sealing performance.
[0004] The technical solution of this utility model is implemented as follows: A bottle cap dispensing machine is provided with a frame and a bottle cap conveyor. It includes a glue conveying device fixed on the frame. The glue conveying device includes a screw fixed above the frame. A cylindrical barrel is wrapped around the screw. The rear end of the screw is provided with a feed port. Multiple heating elements are sleeved on the outer surface of the barrel. A hopper is provided above the feed port, and its bottom end passes through the barrel and is connected to the feed port. A nozzle is connected to the front end of the barrel. The front end of the nozzle is a protruding structure with a square cross-section. A discharge port is provided at the top front of the nozzle, and a pre-extrusion port is provided at the bottom rear. A rotary valve lever is provided between the pre-extrusion port and the discharge port to control the discharge direction. The rotary valve lever includes a valve that communicates with the nozzle and can change direction, and a rocker arm fixed on the frame and connected to the valve.
[0005] It also includes a bottle cap assembly device, which includes a chassis fixed to a frame, with a first rotating cylinder at the center of the chassis; a first rotating disk coaxially rotating with the first rotating cylinder is provided above the chassis, and the outer edge of the first rotating disk is evenly provided with a plurality of first notches that mate with bottle caps; an annular limiting plate for preventing bottle caps from detaching upwards is fixed to the first rotating cylinder and located above the first rotating disk; a first fixing plate is fixed around the first rotating cylinder and located above the limiting plate; a second fixing plate is fixed to the first rotating cylinder and located above the first fixing plate; a top plate is fixed above the first rotating cylinder and located above the second fixing plate; and a protective plate that mates with the first notches is provided on the side of the chassis to prevent bottle caps from flying out.
[0006] Multiple scraping devices are fixed on the first fixed plate. Each scraping device includes a scraper rod that passes through the first fixed plate, corresponds to the first recess, and can move up and down. A connector with a diameter larger than the scraper rod is connected to the top of the scraper rod and passes through and is fixed on the second fixed plate. A spring is sleeved on the scraper rod at the position between the first fixed plate and the connector. The scraper rod has a hollow internal structure, and an air pipe connected to the connector communicates with the internal structure of the scraper rod. A roller is provided on the top of the connector. The nozzle outlet is located on the path of the scraper rod at the bottom end. The top plate has a first guide block and a second guide block extending downward. The first guide block is located above the nozzle and on the path of the roller. The second guide block is located in the same direction as the rotation of the first drum and is located on one side of the first guide block.
[0007] It also includes a transition plate for transferring the bottle cap to the other side, including a transition plate flush with the base plate, a third rotating plate on the transition plate, and an opening on the third rotating plate that mates with the bottle cap.
[0008] It also includes a die ejection device, which consists of a base fixed to the frame, a second rotating cylinder at the center of the base, a concave curved guide groove on the lower outer wall of the second rotating cylinder, a first annular placement tray surrounding the second rotating cylinder and positioned above the guide groove, a second annular base plate surrounding the second rotating cylinder and flush with the transition plate, a second rotating disk on the base plate, and multiple second notches on the outer edge of the second rotating disk that mate with bottle caps; a second annular placement tray surrounding the second rotating cylinder and positioned above the second rotating disk, and a third annular placement tray surrounding the second rotating cylinder and positioned on the second placement tray. Multiple vertically movable pressure rods are evenly fixed on the third and second storage trays. The rear end of each pressure rod is fixed between the second and third storage trays and is fitted with a spring. The front end of each pressure rod passes through the second storage tray and extends downward. The front end of each pressure rod is connected to a pressure mold. The pressure rods between the pressure mold and the second storage tray are fitted with springs. Multiple vertically movable push rods are evenly fixed on the first storage tray. The top end of each push rod passes through the bottom plate and can extend out of the bottom plate opposite the pressure mold. The lower end of each push rod is connected to a connecting shaft, and the other end of each connecting shaft is connected to a cam. The cam is fixed in a guide groove.
[0009] An arc-shaped baffle is located on the transition plate and between the first and second rotating disks. A lever for guiding the bottle cap discharge is located on the chassis, with the front end of the lever close to the second recess. A discharge port is located at the 12 o'clock position on the chassis and close to the lever. The inlet of the bottle cap conveyor is located at the 12 o'clock position on the chassis, the nozzle is located at the 3 o'clock position on the chassis, and the second guide block is located at the 6 o'clock position on the chassis.
[0010] This utility model provides a bottle cap dispensing machine. The raw material adhesive is conveyed to the screw via a hopper. The screw, driven by a motor, moves forward. During this process, a heating element heats the barrel, increasing its internal temperature and melting the raw material adhesive. Since the initial melted adhesive may not be effective, the rotary valve is positioned to connect with the pre-extrusion port, allowing the melted adhesive to be discharged through the pre-extrusion port. Once its shape is observed and deemed suitable, the rotary valve is rotated to connect with the discharge port. At this point, the melted adhesive is extruded through the discharge port. A bottle cap conveyor feeds the caps into the base and engages them in the first recess. A first rotating disc rotates the bottle caps. The nozzle is positioned above the first rotating disc and higher than the bottle cap inlet. When the bottle cap passes under the nozzle, the scraper above it... The end receives the downward force from the first guide block and moves downward to contact the nozzle. At the same time, the scraper is moved forward by the rotational force of the first rotating cylinder. The scraper scrapes the colloid from the outlet and pushes it down from the nozzle into the bottle cap. At this time, the air pipe connected inside the scraper will also assist the colloid to fall into the bottle cap better by blowing air. Then the bottle cap is quickly transferred to the bottom plate of the compression molding discharge device through the transition plate. The second notch of the second rotating plate will hold the bottle cap and drive it forward. At this time, the push rod moves upward and the pressure rod moves downward at the same time. The simultaneous up and down movement can shorten the overall time of pressing the colloid. The compression mold will press the colloid to spread it out and seamlessly combine it with the bottle cap. After combination, the compression mold continues to press for a while to allow it to cool and solidify, and transports the bottle cap to the outlet. At this time, the pressure rod moves up and the push rod moves down and retracts to the same plane as the bottom plate. The bottle cap is then pushed out of the second rotating plate by the lever and discharged from the outlet.
[0011] This utility model provides a special dispensing machine for bottle caps, which provides a soft, colloidal gasket. Through heating and molding, it not only solves the problem of rapid dissolving of the adhesive, but also solves the problem of spreading the melted adhesive and seamlessly assembling it with the inner bottom of the bottle cap within a few seconds. The structure is simple and easy to operate, and the production efficiency is high while greatly reducing costs. Attached Figure Description
[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0013] Figure 1 This is a partial structural schematic diagram of the bottle cap dispensing machine of this utility model;
[0014] Figure 2 This is a schematic diagram of one orientation of the bottle cap dispensing machine of this utility model;
[0015] Figure 3 for Figure 2 An enlarged schematic diagram of region A;
[0016] Figure 4 for Figure 2 An enlarged schematic diagram of region B;
[0017] Figure 5 This is a structural schematic diagram of a bottle cap dispensing machine from another perspective of the present invention;
[0018] Figure 6 for Figure 5 An enlarged schematic diagram of region C;
[0019] Figure 7 for Figure 5 An enlarged schematic diagram of region D. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0021] Please see Figures 1 to 7A bottle cap dispensing machine is provided, comprising a frame and a bottle cap conveyor, including a glue conveying device 1 fixed on the frame. The glue conveying device 1 includes a screw (not shown) fixed above the frame, and a cylindrical barrel 12 surrounding the screw (not shown). The screw in this design is a common screw structure, and the barrel 12 has a hollow structure. The inner diameter of the barrel 12 is slightly larger than the diameter of the screw (not shown). The inner diameter of the barrel 12 and the screw (not shown) work together to compress the glue and propel it forward. The front end of the screw (not shown) is connected to a motor; the motor is located at one end of the barrel 12 on the frame. The screw (not shown) has a feed inlet (not shown) at its rear end, and multiple heating elements 13 are fitted on the outer surface of the barrel 12. A hopper 14 is located above the feed inlet (not shown), and its bottom end passes through the barrel 12 and is connected to the feed inlet (not shown). The front end of the barrel 12 is connected to a nozzle 120. The front end of the nozzle 120 is a protruding structure with a square cross-section. The structure of the nozzle 120 is designed to cooperate with other structures. Because the colloid needs to be scraped off the nozzle 120 in this structure, it is set as a protruding cuboid structure. If other cooperating structures change, the structure of the nozzle 120 can also be changed accordingly. The nozzle 120 has a discharge port at the top front and a pre-extrusion port at the bottom rear. Between the pre-extrusion port and the discharge port, there is a rotary valve lever 1232 for controlling the discharge direction. The rotary valve lever 1232 includes a valve that is connected to the nozzle 120 and can change direction, and a rocker arm that is fixed on the frame and connected to the valve. The pre-extrusion port is used to observe the melting of the colloid before the formal discharge. In addition, when the color of the colloid used in the bottle cap changes, it can also be used to observe whether the colloid of other colors has been completely removed.
[0022] Please see Figure 2 and Figure 3 and Figure 6 and Figure 7This design also includes a bottle glue assembly device 2, which includes a chassis 21 fixed to a frame, a first rotating cylinder 22 at the center of the chassis 21; a first rotating disk 23 coaxially rotating with the first rotating cylinder 22 is provided above the chassis 21, and a plurality of first notches 24 that mate with bottle caps are evenly provided on the outer edge of the first rotating disk 23; an annular limiting plate 25 for preventing bottle caps from detaching upwards is fixed on the first rotating cylinder 22 and located above the first rotating disk 23; a first fixing plate 26 is fixed around the first rotating cylinder 22 and located above the limiting plate; a second fixing plate 29 is fixed on the first rotating cylinder 22 and located above the first fixing plate 26; a top plate 27 is fixed above the first rotating cylinder 22 and located above the second fixing plate 29; a protective plate 28 that mates with the first notches 24 is provided on the side of the chassis 3421 to prevent bottle caps from flying out; the protective plate 28 has an arc-shaped structure. When the first rotating drum 22 rotates, it drives the first rotating disk 23, and the annular limiting plate 25, the first fixed plate 26, and the top plate 27 all rotate with it.
[0023] Multiple scraping devices are fixed on the first fixed plate 26. Each scraping device includes a scraper rod 261 that passes through the first fixed plate 26, corresponds to the first recess 24, and can move up and down. A connector 262, with a diameter larger than the scraper rod 261, is connected to the top of the scraper rod 261 and passes through and is fixed to the second fixed plate 29. A spring (a common compression spring) is fitted onto the scraper rod 261 at the position between the first fixed plate 26 and the connector 262 to assist in the up and down movement of the scraper rod 261. The scraper rod 261 has a hollow interior, and an air pipe 263 is connected to the connector 262, communicating with the interior of the scraper rod 261. A roller 264 is provided at the top of component 2. The scraper 261 is mainly used to scrape the melted colloid from the outlet of nozzle 120. The overall weight of the scraped colloid can be controlled by setting the speed. The outlet of nozzle 120 is located on the path of scraper 261 at the bottom. Top plate 27 is provided with a first guide block 271 and a second guide block 272 extending downward. The first guide block 271 is located above nozzle 120 and on the path of roller 264. The downward extension of the first guide block 271 causes roller 264 to move downward after contact. The scraper 261, which was originally located above nozzle 120, is then... The head begins to move downwards to contact the upper surface of the nozzle 120, allowing the scraper 261 to smoothly scrape off the colloid. The second guide block 272 is located in the same direction as the rotation of the first rotating drum 22 and on one side of the first guide block 271. The second guide block 272 extends downwards, and it will also move downwards when the roller 264 touches the second guide block 272 again. The function of the second guide block 272 is to ensure that the scraped colloid falls smoothly into the bottle cap. This is because after the head of the scraper 261 scrapes off the colloid, the colloid may move forward with the scraper 261. After the colloid falls off the upper surface of the nozzle 120, it passes through the head wall of the scraper 261. The guide surface will cause it to fall downwards, and by continuing to move the entire scraper 261 downwards to reduce the distance between the head of the scraper 261 and the bottom of the bottle cap, it can be ensured that the colloid will not fall into other positions; the length and width of the first guide block 271 and the second guide block 272 are set according to actual needs to match the operating distance of the scraper 261; under normal circumstances, the scraper 261 is fixed on the first fixed plate 26 by the force of the spring pressing against the connector 262. When the roller 264 of the connector 262 interacts with the first guide block 271 and the second guide block 272, it is subjected to a downward pressure that causes the scraper 261 to move downwards. The reason for setting the roller 264 structure is to reduce the direct friction between the connector 262 and the first guide block 271 and the second guide block 272, and to allow the scraper 261 to move down more smoothly. The function of the air tube 263 is to smoothly send the colloid into the bottle cap by the instantaneous blowing force of the air tube 263 after scraping the colloid from the nozzle 120.
[0024] Please see Figure 1This design also includes a transition plate 4 for transferring the bottle cap to the other side, including a transition plate 41 flush with the base plate 21. The transition plate 41 is provided with a third rotating plate 43, and the third rotating plate 43 is provided with an opening 431 that cooperates with the bottle cap. The function of the transition plate 4 is to transfer the bottle cap to another position. In order to shorten the transportation time, the rotation direction of the third rotating plate 43 in this design is opposite to the rotation direction of the first rotating plate 23, so that the bottle cap can take the shortest route to reach another designated position.
[0025] This design also includes a die ejection device 3, which includes a base 31 fixed to the frame. In this design, the base 31 has a barrel-shaped structure, and the upwardly extending annular wall can serve as a shield and protector. A second rotating cylinder 32 is located in the center of the base 31. A concave curved guide groove (not shown) is provided on the lower outer wall of the second rotating cylinder 32. A first annular placement tray 33 is arranged around the second rotating cylinder 32 and above the guide groove (not shown). The first placement tray 33 rotates synchronously with the second rotating cylinder 32. A ring-shaped base plate 34 surrounds the second rotating cylinder 32. A second rotating disk 341 is mounted on the second rotating cylinder 32 and flush with the transition plate 41. The outer edge of the second rotating disk 341 has multiple second notches 342 that mate with bottle caps. A ring-shaped second storage tray 35 surrounds the second rotating cylinder 32 and is located above the second rotating disk 341. A ring-shaped third storage tray 36 surrounds the second rotating cylinder 32 and is mounted on the second storage tray 35. Multiple vertically movable pressure rods 37 are evenly fixed to the third storage tray 36 and the second storage tray 35. The rear end of each pressure rod 37 is fixed to... Springs are fitted between and around the second and third storage trays 35 and 36, respectively. Ordinary compression springs are sufficient. The front end of each pressure rod 37 passes through the second storage tray 35 and extends downwards. Each pressure rod 37 is connected to a pressure mold 371. Springs are fitted between the pressure mold 371 and the second storage tray 35; ordinary compression springs are sufficient. The bottom of the pressure mold 371 is a mold structure that mates with the inner bottom of the bottle cap, the purpose of which is to press the colloid completely into contact with the bottle cap. Multiple vertically movable push rods 331 are evenly fixed on the tray 33. The top end of each push rod 331 passes through the base plate and can extend out of the base plate opposite to the mold 371. The lower end of each push rod 331 is connected to a connecting shaft 332, and the other end of each connecting shaft 332 is connected to a cam 333. The cam 333 is fixed in the guide groove (not shown). The push rod 331 moves forward along the guide groove (not shown) through the cam 333. The guide groove (not shown) is designed with a curved structure with ups and downs according to actual needs to control the vertical movement of the push rod 331.
[0026] An arc-shaped baffle 42 is disposed on the transition plate 41 and between the first rotating disk 23 and the second rotating disk 341. A lever 38 for guiding bottle cap discharge is disposed on the base plate 3421, with the foremost end of the lever 38 close to the second recess 342. A discharge channel is located at the 12 o'clock position on the base plate and close to the lever 38. The inlet of the bottle cap conveyor (not shown) is located at the 12 o'clock position on the base plate 3421. The nozzle 120 is located at the 3 o'clock position on the base plate 21. The second guide block 272 is located at the 6 o'clock position on the base plate. The second guide block is located below the top plate and directly opposite... The lower position roughly corresponds to the 6 o'clock area on the chassis. Its position is set according to the actual needs of guiding the scraper. In this design, this corresponding position is the optimal position. After feeding at the 12 o'clock inlet, the material is cut at the 3 o'clock position, and then the colloid is immediately transferred to the bottle cap, which is the 6 o'clock area. Of course, the second guide block is a strip-shaped structure, which is in the form of a downward-extending mountain peak. It gradually guides the scraper to move down, so its entire area may occupy the area from 5 o'clock to 7 o'clock on the chassis.
[0027] Preferably, the hopper 14 is equipped with a suction hopper (not shown), and the suction port is connected to a pneumatic suction pipe and an air outlet pipe 263. In use, the pneumatic suction pipe is directly connected to the container containing the raw material colloid, and the raw material colloid is drawn into the hopper through a suction method. One pipe performs the suction action while the other pipe is the air outlet pipe 263, thereby enabling automated operation during material feeding and improving efficiency.
[0028] Preferably, the end of the scraper 261 near the nozzle 120 is a hollow cylinder, and the hollow cylinder has a crescent-shaped cut 265 from top to bottom along the forward direction of the first rotating cylinder 22. The end of the scraper 261 with the cut 265 is very similar to the shovel-like structure with inward curves on both sides, and the half-enclosed end of the scraper 261 makes it easier to scrape the colloid, prevents the colloid from running out, and allows it to fall down the inner wall, ensuring that it falls into the bottle cap.
[0029] Therefore, a ball valve is preferred. However, it is not limited to a ball valve structure; the valve structure can be adjusted according to the actual structural requirements, as long as the valve can effectively change direction.
[0030] Preferably, the rocker arm includes a horizontal connecting rod 1231 connected to the valve and a lever 1232 perpendicular to the connecting rod 1231. The direction of the valve can be easily changed by leveraging the lever 1232.
[0031] Preferably, the heating element 13 is a clamp-type structure that is clamped to the outer wall of the barrel 12, and the heating element 13 is an electric heating element. The clamp-type structure allows the heating element 13 to heat the heating surface of the barrel 12 evenly. In this design, several sets of heating elements 13 are evenly clamped to the outer wall of the barrel 12 to ensure uniform heating and rapid completion of the melting process.
[0032] Preferably, each pressure rod 37 is connected to the second rotating drum 32 via a cam 333 structure. This cam 333 structure is the same in principle and structure as the aforementioned guide groove (not shown) and cam 333, and therefore will not be described again here.
[0033] The bottle cap dispensing machine provided by this utility model first draws the raw material adhesive into the funnel hopper 14 through a suction hopper (not shown). The funnel hopper 14 then conveys the raw material adhesive into a screw (not shown). The screw (not shown) is driven by a motor to rotate and push the raw material adhesive forward. During this process, the heating element 13 heats the barrel 12, raising its internal temperature and melting the raw material adhesive. The heating element 13 is an electric heating element, so its temperature can be adjusted through different settings. Since the initial small section of the freshly melted adhesive may not be very effective, the process is not described. Therefore, the rotary valve lever 1232 is positioned in the direction of the pre-extrusion port, so that the melted colloid is first discharged through the pre-extrusion port to observe its shape until it reaches a suitable state. Then, the rotary valve lever 1232 is rotated to the position connected to the discharge port. At this time, the melted colloid will be squeezed out through the discharge port. The discharge port is set on the upper surface of the nozzle 120 to cooperate with the function of the scraper 261. After the scraper 261 moves down from top to bottom and contacts the upper surface of the nozzle 120, it stops moving down. As it rotates forward, it can directly scrape off the colloid. Meanwhile, the bottle cap conveyor feeds the cap into the chassis 21 and inserts it into the first recess 24. The first rotating disk 23 drives the bottle cap to rotate. The nozzle 120 is located above the first rotating disk 23 and is higher than the bottle cap inlet (not shown). When the bottle cap passes under the nozzle 120, the top of the scraper 261 moves downward under the downward force of the first guide block 271 and contacts the nozzle 120. At the same time, the scraper 261 is driven forward by the rotational force of the first rotating drum 22. The scraper 261 scrapes the colloid from the outlet and pushes it to fall from the nozzle 120 into the bottle cap. At this time, the air pipe 263 connected inside the scraper 261 will also assist the colloid to fall into the bottle cap better through instantaneous air blowing. Then the bottle cap is quickly transferred to the base plate 34 of the molding discharge device 3 through the transition disk 4. Selecting the shortest path transition can ensure Before the colloid hardens, it is flattened and spread out. The second notch 342 of the second rotating disk 341 will hold the bottle cap and move it forward. At this time, the push rod 331 moves upward and the pressure rod 37 moves downward at the same time. The simultaneous up and down movement can shorten the overall pressing time of the colloid. The mold 371 will press the colloid. After being pressed, the colloid is evenly spread out and seamlessly combined with the bottle cap. The mold pattern on the mold 371 corresponds to the pattern on the bottom of the bottle cap. Therefore, the corresponding mold 371 can be used for different bottle caps. After the combination, the mold 371 will continue to press for a while to ensure that the colloid cools and sets. After setting, the bottle cap is also carried to the discharge channel 39. At this time, the pressure rod 37 moves upward and the push rod 331 moves downward and retracts to the same plane as the base plate 34. The bottle cap is then pushed out of the second rotating disk 341 by the lever 38 and discharged from the discharge channel 39. Under normal circumstances, the bottle cap after discharge will also be inspected by the inspection mechanism to check the combination of the colloid and the bottle cap. Defective products will be rejected.
[0034] The bottle cap dispensing machine provided by this utility model effectively solves the problem of using colloids as sealing components inside bottle caps. By combining several sets of structures with different uses, the process of feeding, melting, cutting, transporting, and pressing the colloids is completed, thus reducing costs. Furthermore, due to its inherent properties, it can better serve as a sealing component and provide better sealing performance.
[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A bottle cap special-purpose glue dropping machine, provided with a frame and a bottle cap conveyor, characterized in that, The device includes a colloid conveying device fixed to a frame. The colloid conveying device includes a screw fixed above the frame. A cylindrical barrel is wrapped around the screw. The rear end of the screw has a feed inlet. Multiple heating elements are fitted on the outer surface of the barrel. A hopper is located above the feed inlet, and its bottom end passes through the barrel and is connected to the feed inlet. A nozzle is connected to the front end of the barrel. The front end of the nozzle has a protruding structure with a square cross-section. A discharge port is located at the top front of the nozzle, and a pre-extrusion port is located at the bottom rear. A rotary valve lever is provided between the pre-extrusion port and the discharge port to control the discharge direction. The rotary valve lever includes a valve that communicates with the nozzle and can change direction, and a rocker arm fixed to the frame and connected to the valve. It also includes a bottle cap assembly device, which includes a chassis fixed to a frame, with a first rotating cylinder at the center of the chassis; a first rotating disk coaxially rotating with the first rotating cylinder is provided above the chassis, and the outer edge of the first rotating disk is evenly provided with a plurality of first notches that mate with bottle caps; an annular limiting plate for preventing bottle caps from detaching upwards is fixed to the first rotating cylinder and located above the first rotating disk; a first fixing plate is fixed around the first rotating cylinder and located above the limiting plate; a second fixing plate is fixed to the first rotating cylinder and located above the first fixing plate; a top plate is fixed above the first rotating cylinder and located above the second fixing plate; and a protective plate that mates with the first notches is provided on the side of the chassis to prevent bottle caps from flying out. Multiple scraping devices are fixed on the first fixed plate. Each scraping device includes a scraper rod that passes through the first fixed plate, corresponds to the first recess, and can move up and down. A connector with a diameter larger than the scraper rod is connected to the top of the scraper rod and passes through and is fixed on the second fixed plate. A spring is sleeved on the scraper rod at the position between the first fixed plate and the connector. The scraper rod has a hollow internal structure, and an air pipe connected to the connector communicates with the internal structure of the scraper rod. A roller is provided on the top of the connector. The nozzle outlet is located on the path of the scraper rod at the bottom end. The top plate has a first guide block and a second guide block extending downward. The first guide block is located above the nozzle and on the path of the roller. The second guide block is located in the same direction as the rotation of the first drum and is located on one side of the first guide block. It also includes a transition plate for transferring the bottle cap to the other side, including a transition plate flush with the base plate, a third rotating plate on the transition plate, and an opening on the third rotating plate that mates with the bottle cap. It also includes a die ejection device, which consists of a base fixed to the frame, a second rotating cylinder at the center of the base, a concave curved guide groove on the lower outer wall of the second rotating cylinder, a first annular placement tray surrounding the second rotating cylinder and positioned above the guide groove, a second annular base plate surrounding the second rotating cylinder and flush with the transition plate, a second rotating disk on the base plate, and multiple second notches on the outer edge of the second rotating disk that mate with bottle caps; a second annular placement tray surrounding the second rotating cylinder and positioned above the second rotating disk, and a third annular placement tray surrounding the second rotating cylinder and positioned on the second placement tray. Multiple vertically movable pressure rods are evenly fixed on the third and second storage trays. The rear end of each pressure rod is fixed between the second and third storage trays and is fitted with a spring. The front end of each pressure rod passes through the second storage tray and extends downward. The front end of each pressure rod is connected to a pressure mold. The pressure rods between the pressure mold and the second storage tray are fitted with springs. Multiple vertically movable push rods are evenly fixed on the first storage tray. The top end of each push rod passes through the bottom plate and can extend out of the bottom plate opposite the pressure mold. The lower end of each push rod is connected to a connecting shaft, and the other end of each connecting shaft is connected to a cam. The cam is fixed in a guide groove. An arc-shaped baffle is located on the transition plate and between the first and second rotating disks. A lever for guiding the bottle cap discharge is located on the chassis, with the front end of the lever close to the second recess. A discharge port is located at the 12 o'clock position on the chassis and close to the lever. The inlet of the bottle cap conveyor is located at the 12 o'clock position on the chassis, the nozzle is located at the 3 o'clock position on the chassis, and the second guide block is located at the 6 o'clock position on the chassis.
2. A glue dropping machine for bottle caps as claimed in claim 1, wherein, The hopper is equipped with a material extraction hopper, and the extraction port is connected to a pneumatic extraction pipe and an air outlet pipe.
3. A glue dropping machine for bottle caps as claimed in claim 1, wherein, The end of the scraper near the nozzle is a hollow cylinder, and the hollow cylinder has a crescent-shaped cut from top to bottom along the forward direction of the first rotating drum.
4. The bottle cap special glue dropping machine according to claim 1, characterized in that, Therefore, the valve is a ball valve.
5. The bottle cap special glue dropping machine according to claim 1, characterized in that, The rocker arm includes a horizontal connecting rod that is connected to the valve and a hand lever that is perpendicular to the connecting rod.
6. A special glue dropping machine for bottle caps as claimed in claim 1, wherein, The heating element is a clamp-type structure that is attached to the outer wall of the gun barrel, and the heating element is an electric heating element.
7. A special glue dropping machine for bottle caps as claimed in claim 1, wherein, Each pressure rod is connected to the second rotating drum via a cam structure.