Glue injection device and glue injection method

Abstract

The present invention belongs to the technical field of glue injection devices. The glue injection device includes: a feeding mechanism for linearly conveying the bottle caps to be injected after being stamped and formed; a feeding support and limiting mechanism for receiving the bottle caps to be injected after being stamped and formed conveyed by the feeding mechanism, and supporting and limiting the bottle caps to be injected after being stamped and formed, and at the same time, the feeding and limiting mechanism drives the bottle caps to be injected after being stamped and formed to move linearly; a rotary glue injection mechanism rotatably arranged on a frame, and the rotary glue injection mechanism rotates 360° to realize glue injection of the bottle caps to be injected after being stamped and formed below the rotary glue injection mechanism; a discharging mechanism for receiving the bottle caps injected by the rotary glue injection mechanism, and the discharging mechanism drives the bottle caps to move linearly after being injected. The present invention also discloses a method for injecting polyvinyl chloride sealant gaskets in tinplate bottle caps. The present invention is used to solve the technical problem that the glue injection track does not completely cover the circumferential edge of the bottle cap due to the glue injection device, resulting in a high defective rate.

Description

Technical Field

[0001] The present invention relates to the technical field of glue injection devices, and in particular to a glue injection device and a glue injection method implemented by using the glue injection device. Background Art

[0002] A sealed tinplate bottle cap includes a stamped tinplate cap body and a polyvinyl chloride sealant gasket coated on the inner edge of the cap body. In existing tinplate bottle caps, during the gluing process, the tinplate cap body is rotated to achieve stamping, and the tinplate cap body rotates while the glue injection assembly is fixed to achieve glue injection of the polyvinyl chloride sealant gasket coated on the inner edge of the cap body. With the above structure, first, because the glue injection device is fixed, the bottle cap rotating device only rotates a certain angle, resulting in the glue injection track not completely covering the circumferential edge of the bottle cap, resulting in a high defective rate; second, two sets of rotating devices are required, which is costly; and third, the two sets of rotating devices must be precisely matched. Summary of the Invention

[0003] The first object of the present invention is to provide a glue injection device to solve the technical problem that the glue injection track does not completely cover the circumferential edge of the bottle cap and the defective rate is high.

[0004] In order to solve the above problems, the present invention adopts the following technical solutions, the glue injection device comprises:

[0005] Feeding mechanism, used for linear conveying of bottle caps to be injected with glue after stamping;

[0006] The feeding support and limiting mechanism is used to receive the stamped and formed bottle caps to be injected with glue delivered by the feeding mechanism, and to support and limit the stamped and formed bottle caps to be injected with glue. At the same time, the feeding and limiting mechanism drives the stamped and formed bottle caps to be injected with glue to perform linear motion;

[0007] The rotary glue injection mechanism is rotatably arranged on the frame, and the rotary glue injection mechanism rotates 360 degrees to realize glue injection on the bottle cap to be injected after being stamped and formed below the rotary glue injection mechanism;

[0008] The discharging mechanism is used to receive the bottle caps after being injected with glue by the rotary injection mechanism, and the discharging mechanism drives the bottle caps after being injected with glue to perform linear motion.

[0009] The cap body of the present invention is designed to move linearly, and the glue injection mechanism is designed to move rotaryly. The glue injection mechanism rotates one circle to complete the glue injection of a tinplate bottle cap. Because the bottle cap is fixed and the glue injection device rotates, the glue injection track completely covers the circumferential edge of the bottle cap, which greatly reduces the defective rate. Secondly, only one set of linear motion device and one set of rotation device are required, which greatly reduces the cost. Thirdly, the linear motion device and the rotation device only need to be coaxially arranged with their center lines, which reduces the matching accuracy.

[0010] In order to solve the technical problem of the specific structure of the feeding support and limiting mechanism, the present invention adopts the following technical solution: the feeding support and limiting mechanism includes a chain plate conveying mechanism, including a driving sprocket, a driven sprocket, and an annular chain plate assembly sleeved on the driving sprocket and the driven sprocket, the annular chain plate assembly including a plurality of hinged chain plates;

[0011] A bottle cap limiting groove is obliquely provided on the chain plate for placing and limiting the bottle cap; a supporting plate is provided below the upper chain plate for supporting the upper chain plate and the bottle cap in the bottle cap limiting groove; a baffle is provided on the outer side of the upper chain plate, and the baffle and the bottle cap limiting groove form a bottle cap limiting member.

[0012] The present invention optimizes the design of the chain plate of the chain plate conveying mechanism, processes the bottle cap limiting groove, and adds a baffle to prevent the bottle cap from falling off from the side of the limiting groove. The linear movement of the bottle cap is achieved by utilizing the cooperation of the driving sprocket, the driven sprocket and the chain plate assembly; the supporting plate is utilized to prevent the bottle cap from falling from the limiting groove, thereby achieving the purposes of conveying, limiting and supporting the bottle cap.

[0013] In order to solve the technical problem that a single feeding support and limiting mechanism is equipped with a single feeding mechanism and a single discharging mechanism, and the glue injection efficiency is low, the present invention adopts the following technical solution: a first feeding mechanism and a second feeding mechanism are respectively provided on both sides of the chain conveying mechanism;

[0014] A first discharging mechanism and a second discharging mechanism are respectively provided on both sides of the chain conveying mechanism.

[0015] The present invention doubles the glue injection efficiency by equipping the chain plate conveying mechanism with two sets of feeding and discharging mechanisms.

[0016] In order to solve the technical problem of how to coordinate the chain plate conveying mechanism with the two sets of feeding and discharging mechanisms, the present invention adopts the following technical solution: the chain plate conveying mechanism includes a first chain plate conveying mechanism and a second chain plate conveying mechanism arranged in parallel;

[0017] A first bottle cap limiting groove is provided on the first chain plate of the first chain plate conveying mechanism, and a first baffle is provided on the outer side of the upper portion of the first chain plate; a second bottle cap limiting groove is provided on the second chain plate of the second chain plate conveying mechanism, and the second bottle cap limiting groove forms a V-shaped structure with the first bottle cap limiting groove; a second baffle is provided on the outer side of the upper portion of the second chain plate.

[0018] The present invention saves space and doubles the glue injection efficiency by arranging two sets of glue injection devices symmetrically and side by side.

[0019] In order to solve the technical problem that the glue injection device requires two sets of conveying support and limiting mechanisms, which occupies a large area and has high investment costs, the present invention adopts the following technical solution: the first bottle cap limiting groove and the second bottle cap limiting groove are symmetrically arranged on both sides of the chain plate of the chain plate conveying mechanism, and the first baffle and the second baffle are respectively arranged on both sides of the upper chain plate.

[0020] The present invention realizes a chain conveying mechanism by symmetrically arranging a bottle cap limiting groove and a second bottle cap limiting groove on both sides of a single chain plate of a chain plate assembly of a chain conveying mechanism, thereby realizing a chain conveying mechanism, and injecting glue on the left and right sides at the same time, thereby doubling the glue injection efficiency without changing the occupied area and without adding equipment.

[0021] In order to solve the technical problem of how to realize the transfer glue injection mechanism, the present invention adopts the following technical solution: the rotary glue injection mechanism includes a frame, a driving motor arranged on the frame, a transmission mechanism, and a glue discharge component;

[0022] The driving motor is connected to the glue discharging assembly through a transmission mechanism, and the driving motor drives the glue discharging assembly to rotate 360 ​​degrees to achieve glue injection of the bottle cap.

[0023] In order to solve the technical problem of the glue inlet pipe being wound due to the rotation of the glue outlet assembly, the present invention adopts the following technical solution. The glue outlet assembly includes a glue inlet pipe, a shell, a rotating assembly, and a glue outlet elbow;

[0024] The housing feed end is connected to the glue feed pipe, the housing discharge end is provided with the rotating assembly, the rotating assembly cooperates with the glue discharge elbow, the glue discharge elbow can rotate relative to the housing, and the glue discharge elbow is connected to the driving mechanism through the transmission mechanism;

[0025] The glue outlet bent pipe is an S-shaped structure, including a first vertical pipe, a connecting bent pipe, and a second vertical pipe arranged from top to bottom; the first vertical pipe is coaxially arranged with the center line of the bottle cap limiting groove directly below the first vertical pipe; the glue outlet bent pipe rotates, driving the second vertical pipe to rotate, and the second vertical pipe rotates one circle to achieve glue coating on the outside of the bottle cap in the bottle cap limiting groove.

[0026] The present invention improves the structure of the discharge assembly. The shell and the rubber inlet pipe are fixed, while the discharge elbow can rotate relative to the shell and the rubber inlet pipe, effectively solving the winding problem caused by the rotation of the rubber injection pipe. At the same time, the rotating motor only needs to rotate in one direction, and the control program is simple.

[0027] In order to solve the technical problem of the glue inlet pipe being wound due to the rotation of the glue discharge assembly, the present invention adopts the following technical solution: the glue discharge assembly includes a rotating shaft, a glue injection pipe arranged on the rotating shaft, and the bottle cap limiting groove directly below the rotating shaft is coaxially arranged with the center line of the rotating shaft; the rotating shaft is connected to the driving motor through a transmission mechanism; the driving motor is a forward and reverse motor.

[0028] The rotary glue injection mechanism of the present invention completes glue injection of one bottle cap by rotating forward once and completes glue injection of the next bottle cap by rotating reversely once, thereby effectively solving the problem of glue feed pipe winding.

[0029] In order to solve the technical problem of unsmooth feeding and discharging of the feeding mechanism and the discharging mechanism, the present invention adopts the following technical solution: the feeding mechanism and the discharging mechanism are both conveyor belt structures, and a Y-shaped structure is formed between the feeding mechanism and the conveying limiting mechanism; a Y-shaped structure is formed between the discharging mechanism and the conveying limiting mechanism;

[0030] The feeding mechanism and the discharging mechanism are arranged in parallel.

[0031] The present invention designs the feeding and discharging mechanisms and the conveying limiting mechanism to be Y-shaped structures. The feeding and discharging directions are aligned with the inclined directions of the limiting grooves, thereby reducing feeding and discharging resistance and ensuring smooth feeding and discharging.

[0032] The second object of the present invention is to provide a method for injecting polyvinyl chloride sealant gaskets into tinplate bottle caps, which is implemented using any of the injection equipment described above, and specifically includes:

[0033] The feeding mechanism moves linearly to convey the stamped tinplate bottle caps to the conveying support and limiting mechanism;

[0034] The conveying support and limiting mechanism drives the tinplate bottle cap to move linearly to the bottom of the rotary glue injection mechanism;

[0035] The rotary glue injection mechanism rotates 360 degrees to complete the glue injection of the polyvinyl chloride sealant gasket inside the tinplate bottle cap;

[0036] The conveying support and limiting mechanism drives the tinplate bottle cap after the injection of glue to move linearly to a position without the support mechanism, and the tinplate bottle cap after the injection of glue falls onto the discharging mechanism;

[0037] The discharging mechanism moves linearly to transport the tinplate bottle caps after glue injection to the drying mechanism for heating and forming.

[0038] The present invention designs the movement trajectory of the cap body as linear motion and the glue injection mechanism as rotational motion. The glue injection mechanism rotates one circle to complete the glue injection of a tinplate bottle cap, so that the glue injection trajectory completely covers the circumferential edge of the bottle cap, greatly reducing the defective rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a side view schematic diagram of the glue injection device of the present invention;

[0040] Figure 2 It is a schematic top view of the glue injection device of the present invention;

[0041] Figure 3Schematic diagram of the rotary glue injection mechanism 1 of the present invention;

[0042] Figure 4 This is a state diagram of the rotary glue injection mechanism of the present invention;

[0043] Figure 5 Schematic diagram of the second rotary glue injection mechanism of the present invention;

[0044] Figure 6 This is a state diagram of the rotary glue injection mechanism 2 of the present invention;

[0045] Figure 7 Schematic diagram of the conveying support and limiting mechanism 1 of the present invention;

[0046] Figure 8 is a schematic diagram of the second conveying support and limiting mechanism of the present invention;

[0047] Figure 9 It is a structural schematic diagram of the chain plate of the conveying support and limiting mechanism 1 of the present invention;

[0048] Figure 10 yes Figure 7 Cross-sectional view in the AA direction;

[0049] Figure 11 It is a structural schematic diagram of the chain plate of the conveying support and limiting mechanism 2 of the present invention;

[0050] Figure 12 It is a partial schematic diagram of the conveying support and limiting mechanism 1 of the present invention;

[0051] Figure 13 This invention Figure 12 Enlarged view of part B in the middle; DETAILED DESCRIPTION

[0052] Example 1

[0053] like Figure 1 、 2 As shown in Figures 5, 6, and 9, the glue injection device includes a feeding mechanism 1, a feeding support and limiting mechanism 2, a rotary glue injection mechanism 3, and a discharging mechanism 4.

[0054] The feeding mechanism 1 is preferably a conveyor belt structure, and the feeding mechanism 1 is located on one side of the feeding support and limiting mechanism 2, and a Y-shaped structure is formed between the feeding mechanism 1 and the feeding support and limiting mechanism 2. The feeding mechanism 1 is used to linearly convey the bottle caps 5 to be injected after stamping.

[0055] The feeding support and limiting mechanism 2 is used to receive the stamped and formed bottle caps to be injected with glue delivered by the feeding mechanism, and to support and limit the stamped and formed bottle caps to be injected with glue. At the same time, the feeding limit mechanism drives the stamped and formed bottle caps to be injected with glue to move linearly.

[0056] The feed support and limiting mechanism 2 includes a single chain plate conveying mechanism, which includes a driving sprocket 21, a driven sprocket 22, and an annular chain plate assembly 23 sleeved on the driving sprocket 21 and the driven sprocket 22. The annular chain plate assembly includes a plurality of hinged chain plates 230.

[0057] A bottle cap limiting groove 2300 is obliquely provided on one side of the chain plate 230 for placing the bottle cap and limiting the bottle cap 5 .

[0058] A support plate 24 is provided below the upper chain plate to support the upper chain plate 230 and the bottle cap 5 in the bottle cap limiting groove 2300. A baffle 25 is provided outside the upper chain plate, and the baffle 25 and the bottle cap limiting groove 2300 form a bottle cap limiting member.

[0059] like Figure 5 、 6 As shown, the rotary glue injection mechanism 3 includes a frame 30, a drive motor 31 provided on the frame 30, a transmission mechanism 33, and a glue discharging assembly. The drive motor 31 is a forward and reverse motor. The transmission mechanism 33 is preferably a belt transmission mechanism.

[0060] The glue dispensing assembly includes a rotating shaft 34, a connecting rod 35, and a glue injection hose 36. The rotating shaft 34 is vertically suspended from the frame 30. Bearings are provided on the frame 30 to provide rotational support for the rotating shaft 34. A bottle cap retaining groove directly below the rotating shaft 34 is coaxial with the centerline of the rotating shaft; the rotating shaft is connected to the drive motor via a transmission mechanism. A glue injection hose 36 is provided on the rotating shaft 34. A connecting rod 35 is provided horizontally on the rotating shaft 34. Preferably, there are two connecting rods 35.

[0061] The driving motor 31 is connected to the glue discharging assembly through the transmission mechanism 33 . The driving motor 31 drives the glue discharging assembly to rotate 360° to inject glue into the bottle cap 5 to be injected after being stamped and formed below the rotary glue injection mechanism 3 .

[0062] The discharge mechanism 4 is preferably a conveyor belt structure. A Y-shaped structure is formed between the discharge mechanism 4 and the conveying support and limiting mechanism 3. The discharge mechanism 4 is arranged parallel to the feeding mechanism 1. The discharge mechanism 4 is used to receive the bottle caps 5 after being injected by the rotary injection mechanism 3, and the discharge mechanism 4 drives the injected bottle caps 5 in linear motion.

[0063] The method for injecting polyvinyl chloride sealant gasket in tinplate bottle cap is realized by using the above-mentioned injection device, comprising:

[0064] The feeding mechanism moves linearly to convey the stamped tinplate bottle caps to the conveying support and limiting mechanism;

[0065] The conveying support and limiting mechanism drives the tinplate bottle cap to move linearly to the bottom of the rotary injection mechanism;

[0066] The rotary injection mechanism rotates 360° in the forward direction to complete the injection of PVC sealant gasket inside the tinplate bottle cap;

[0067] The rotary injection mechanism rotates 360° in the opposite direction to complete the injection of the PVC sealant gasket on the inside of the next tinplate bottle cap;

[0068] The conveying support and limiting mechanism drives the tinplate bottle cap after glue injection to move linearly to the position without the support mechanism, and the tinplate bottle cap after glue injection falls onto the discharging mechanism;

[0069] The discharging mechanism moves linearly to transport the tinplate bottle caps after glue injection to the drying mechanism for heating and forming.

[0070] The present invention designs the rotary glue injection mechanism to rotate forward once, pause, and then reverse once, so as to realize glue injection to two bottle caps in succession, and effectively solves the winding problem caused by the rotation of the glue injection tube.

[0071] Example 2

[0072] In the glue injection device shown in Example 1, a single feeding support and limiting mechanism 2 is equipped with a single feeding mechanism and a single discharging mechanism, and the glue injection efficiency is not high.

[0073] like Figure 7 、 9 As shown in Figures 10 and 11, a first feeding mechanism 11 and a second feeding mechanism 12 are respectively provided on both sides of the feeding support and limiting mechanism 2. A first discharging mechanism 41 and a second discharging mechanism 42 are respectively provided on the feeding support and limiting mechanism 2.

[0074] The chain conveying mechanism 2 includes a first chain conveying mechanism and a second chain conveying mechanism which are arranged in parallel.

[0075] A first bottle cap limiting groove 23100 is provided on the first chain plate 2310 of the chain plate assembly 231 of the first chain plate conveying mechanism, and a first baffle 251 is provided on the outer side of the upper portion of the first chain 23100 .

[0076] A second bottle cap limiting groove 23200 is provided on the second chain plate 2320 of the second chain plate conveying mechanism chain plate assembly 232, and the second bottle cap limiting groove 23200 and the first bottle cap limiting groove 23100 form a V-shaped structure; a second baffle 252 is provided on the outer side of the upper portion of the second chain plate.

[0077] The present invention saves space and doubles the glue injection efficiency by arranging two sets of glue injection devices symmetrically and side by side.

[0078] Example 3

[0079] The glue injection device shown in Example 2 requires two sets of conveying, supporting and limiting mechanisms, which occupies a large area and has high investment costs.

[0080] like Figure 8 、 11 As shown, the number of the chain plate conveying mechanism is 1. A first bottle cap limiting groove 2301 and a second bottle cap limiting groove 2302 are symmetrically provided on both sides of the chain plate 230 , and a first baffle 251 and a second baffle 252 are respectively provided on both sides of the upper chain plate 230 .

[0081] The present invention realizes a chain conveying mechanism by symmetrically arranging a bottle cap limiting groove and a second bottle cap limiting groove on both sides of a single chain plate of a chain plate assembly of a chain conveying mechanism, thereby realizing a chain conveying mechanism, and injecting glue on the left and right sides at the same time, thereby doubling the glue injection efficiency without changing the occupied area and without adding equipment.

[0082] Example 4

[0083] Examples 1, 2, and 3

[0084] like Figure 3 、 4 As shown, the rotary glue injection mechanism 3 includes a frame 30, a driving motor 31 provided on the frame 30, a transmission mechanism 33, and a glue discharging assembly 32. The transmission mechanism 33 is preferably a belt transmission mechanism.

[0085] The glue outlet assembly 32 includes a glue inlet pipe 320 , a housing 321 , a rotating assembly 322 , and a glue outlet elbow 323 .

[0086] The feed end of the shell 321 is connected to the glue inlet pipe 320, and the discharge end of the shell 321 is provided with a rotating component 322. The rotating component 322 cooperates with the glue outlet elbow 323. The glue outlet elbow 323 can rotate relative to the shell 321 and the glue inlet pipe 320. The glue outlet elbow 323 is connected to the driving mechanism 31 through the transmission mechanism 33.

[0087] The glue outlet elbow 323 is an S-shaped structure, including a first vertical pipe, a connecting elbow, and a second vertical pipe arranged from top to bottom; the first vertical pipe is coaxially arranged with the center line of the bottle cap limiting groove directly below the first vertical pipe; the glue outlet elbow rotates, driving the second vertical pipe to rotate, and the second vertical pipe rotates one circle to achieve glue coating on the outside of the bottle cap in the bottle cap limiting groove.

[0088] The present invention improves the structure of the discharge assembly. The shell and the rubber inlet pipe are fixed, while the discharge elbow can rotate relative to the shell and the rubber inlet pipe, effectively solving the winding problem caused by the rotation of the rubber injection pipe. At the same time, the rotating motor only needs to rotate in one direction, and the control program is simple.

[0089] The method for injecting polyvinyl chloride sealant gasket in tinplate bottle cap is realized by using the above-mentioned injection device, comprising:

[0090] The feeding mechanism moves linearly to convey the stamped tinplate bottle caps to the conveying support and limiting mechanism;

[0091] The conveying support and limiting mechanism drives the tinplate bottle cap to move linearly to the bottom of the rotary injection mechanism;

[0092] The rotary injection mechanism rotates 360° to complete the injection of PVC sealant gasket inside the tinplate bottle cap;

[0093] The conveying support and limiting mechanism drives the tinplate bottle cap after glue injection to move linearly to the position without the support mechanism, and the tinplate bottle cap after glue injection falls onto the discharging mechanism;

[0094] The discharging mechanism moves linearly to transport the tinplate bottle caps after glue injection to the drying mechanism for heating and forming.

[0095] Example 5

[0096] The diameter of the bottle cap limiting groove 2300 is larger than the diameter of the bottle cap 5, so that the bottle cap will shake in the space surrounded by the bottle cap limiting assembly, causing the glue coating track to deviate.

[0097] like Figure 12 、 13 As shown, the bottle cap limiting groove 2300 is radially and evenly distributed with elastic limiting pins 234, which include an elastic member 2342 and a limiting pin 2343 connected to each other. The chain plate 230 is provided with a mounting hole 2341, and the elastic member 2342 is disposed in the mounting hole 2341. Preferably, the number of elastic limiting pins 234 is three.

[0098] The present invention further limits the bottle cap in the bottle cap limiting groove 2300 through the circumferentially evenly distributed elastic limiting pins 234, so that the bottle cap is kept in the center of the bottle cap limiting groove 2300 as much as possible, ensuring that the actual gluing trajectory is as consistent as possible with the imagined gluing trajectory.

Claims

1. A glue injection device, characterized in that it comprises: Feeding mechanism, used for linear conveying of bottle caps to be injected with glue after stamping; The feeding support and limiting mechanism is used to receive the stamped and formed bottle caps to be injected with glue delivered by the feeding mechanism, and to support and limit the stamped and formed bottle caps to be injected with glue. At the same time, the feeding support and limiting mechanism drives the stamped and formed bottle caps to be injected with glue to move linearly; The rotary glue injection mechanism is rotatably arranged on the frame, and the rotary glue injection mechanism rotates 360 degrees to realize glue injection on the bottle cap to be injected after being stamped and formed below the rotary glue injection mechanism; A discharging mechanism, for receiving the bottle caps injected with glue by the rotary glue injection mechanism, and for driving the bottle caps injected with glue to perform linear motion; The material feeding support and limiting mechanism includes a chain plate conveying mechanism, including a driving sprocket, a driven sprocket, and an annular chain plate assembly sleeved on the driving sprocket and the driven sprocket, the annular chain plate assembly including a plurality of hinged chain plates; The chain plate is obliquely provided with a bottle cap limiting groove for placing the bottle cap and limiting the bottle cap; a supporting plate is provided below the upper chain plate for supporting the upper chain plate and the bottle cap in the bottle cap limiting groove; a baffle is provided on the outer side of the upper chain plate, and the baffle and the bottle cap limiting groove form a bottle cap limiting member; The bottle cap limiting groove is evenly distributed radially around the circumference and is provided with elastic limiting pins, which include an elastic member and the limiting pins connected to each other; a mounting hole is provided on the chain plate, and the elastic member is provided in the mounting hole.

2. The glue injection device according to claim 1, characterized in that: A first feeding mechanism and a second feeding mechanism are respectively provided on both sides of the chain conveying mechanism; A first discharging mechanism and a second discharging mechanism are respectively provided on both sides of the chain conveying mechanism.

3. The glue injection device according to claim 2, characterized in that: The chain plate conveying mechanism includes a first chain plate conveying mechanism and a second chain plate conveying mechanism arranged in parallel; A first bottle cap limiting groove is provided on the first chain plate of the first chain plate conveying mechanism, and a first baffle is provided on the outer side of the upper portion of the first chain plate; A second bottle cap limiting groove is provided on the second chain plate of the second chain plate conveying mechanism, and the second bottle cap limiting groove and the first bottle cap limiting groove form a V-shaped structure; a second baffle is provided on the outer side of the upper portion of the second chain plate.

4. The glue injection device according to claim 2, characterized in that: The first bottle cap limiting groove and the second bottle cap limiting groove are symmetrically arranged on both sides of the chain plate of the chain plate conveying mechanism, and the first baffle and the second baffle are respectively arranged on both sides of the upper chain plate.

5. The glue injection device according to claim 1, characterized in that: The rotary glue injection mechanism includes a frame, a driving motor arranged on the frame, a transmission mechanism, and a glue discharging component; The driving motor is connected to the glue discharging assembly through a transmission mechanism, and the driving motor drives the glue discharging assembly to rotate 360 ​​degrees to achieve glue injection of the bottle cap.

6. The glue injection device according to claim 5, characterized in that: The glue outlet assembly includes a glue inlet pipe, a shell, a rotating assembly, and a glue outlet elbow; The housing feed end is connected to the glue feed pipe, the housing discharge end is provided with the rotating assembly, the rotating assembly cooperates with the glue discharge elbow, the glue discharge elbow can rotate relative to the housing, and the glue discharge elbow is connected to the driving mechanism through the transmission mechanism; The glue outlet bent pipe is an S-shaped structure, including a first vertical pipe, a connecting bent pipe, and a second vertical pipe arranged from top to bottom; the first vertical pipe is coaxially arranged with the center line of the bottle cap limiting groove directly below the first vertical pipe; the glue outlet bent pipe rotates, driving the second vertical pipe to rotate, and the second vertical pipe rotates one circle to achieve glue coating on the outside of the bottle cap in the bottle cap limiting groove.

7. The glue injection device according to claim 5, characterized in that: The glue discharging assembly includes a rotating shaft and a glue injection tube arranged on the rotating shaft. The bottle cap limiting groove directly below the rotating shaft is coaxially arranged with the center line of the rotating shaft. The rotating shaft is connected to the driving motor through a transmission mechanism. The driving motor is a forward and reverse rotating motor.

8. The glue injection device according to claim 1, characterized in that: The feeding mechanism and the discharging mechanism are both conveyor belt structures, and a Y-shaped structure is formed between the feeding mechanism and the feeding support and limiting mechanism; A Y-shaped structure is formed between the discharging mechanism and the feeding support and limiting mechanism; The feeding mechanism and the discharging mechanism are arranged in parallel.

9. A method for injecting polyvinyl chloride sealant gaskets into tinplate bottle caps, the method being implemented using the injection device according to any one of claims 1 to 8, comprising: The feeding mechanism moves linearly to deliver the stamped tinplate bottle caps to the feeding support and limiting mechanism; The feeding support and limiting mechanism drives the tinplate bottle cap to move linearly to the bottom of the rotary glue injection mechanism; The rotary glue injection mechanism rotates 360 degrees to complete the glue injection of the polyvinyl chloride sealant gasket inside the tinplate bottle cap; The feeding support and limiting mechanism drives the tinplate bottle cap after the glue injection to move linearly to a position without the support mechanism, and the tinplate bottle cap after the glue injection falls onto the discharging mechanism; The discharging mechanism moves linearly to transport the tinplate bottle caps after glue injection to the drying mechanism for heating and forming.

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