Special-shaped cover glue injection machine

Abstract

The invention provides a special-shaped cover glue injection machine which comprises a glue injection mechanical arm and two cover conveying platforms located below the glue injection mechanical arm and used for placing materials, and the two cover conveying platforms are parallel to each other. Wherein the glue injection mechanical arm comprises a cross beam and two servo motors, the cross beam stretches across the two cover conveying platforms, and the two servo motors are arranged in parallel and mounted in the middle of the top of the cross beam; according to the glue injection device, the servo motor receives glue injection signals, the rotating speed is accurately controlled, and then the double-connecting-rod structure is controlled to complete circulating reciprocating motion according to different glue injection tracks; compared with a traditional mechanical arm which needs to spend time in displacement or mechanical forced limitation to complete different glue injection tracks, the double-connecting-rod structure is directly used for controlling the tracks, the flexibility is considered, the displacement moving time is shortened, the glue injection speed is high, and the glue injection efficiency is high. And time is not wasted.

Description

Technical Field

[0001] The invention relates to a glue injection machine for special-shaped covers and belongs to the field of metal packaging. Background Art

[0002] In the packaging industry, in addition to packaging bottles and packaging boxes for packaging items, there are also packaging caps used to seal packaging bottles and packaging boxes. Different from traditional round caps, square caps, oval caps and other special-shaped caps are now produced. Due to the large market demand, the production speed of special-shaped caps is also constantly increasing.

[0003] During the production of special-shaped covers, the grooves on the special-shaped covers need to be injected with glue. The grooves on the special-shaped covers have multiple sides of different lengths. The conventional technology has different linear speeds when sliding within each side.

[0004] Therefore, the increase in the production speed of special-shaped caps also means that the glue injection process at the back end needs to be equipped with multiple glue injection machines to match the capping speed at the front end. This not only increases the equipment's land cost, but also requires additional staff to participate when the production speed needs to be accelerated, increasing labor costs.

[0005] For example, prior art 1: the application number is 202323348603.4, and the name of the patent application is a glue injection device for special-shaped covers, which discloses that by opening a track groove on the track plate, the spray gun moves along the track groove at an approximately uniform linear speed driven by the guide component, so that the distance traveled by the spray gun in the same time during the glue injection process is approximately the same, and the glue is evenly injected into the groove on the special-shaped cover when the glue output flow rate of the spray gun remains unchanged, thereby improving product quality.

[0006] For example, prior art 2: the application number is 200820103187.8, and the name of the patent application is a glue injection machine for special-shaped covers, which discloses the use of a robotic arm type glue injection method. The robotic arm is mainly composed of a Y-axis working arm and an X-axis working arm, and a PLC programmable controller is used to complete the control of the entire work process. The servo motor responds to the control signal output by the PLC programmable controller and cooperates with the ball screw to make the glue injection valve work in a certain way as the Y-axis working arm and the X-axis working arm move, so that the glue injection process of the special-shaped cover is not affected by the movement of the can cover or the glue injection nozzle.

[0007] That is to say, the above-mentioned prior art 1 is a glue injection machine that uses mechanical forced limit to produce special-shaped glue. It is not only slow, but also cannot make the glue injection track move at a uniform speed during operation. It is easy to cause uneven glue injection at the corners, affecting product treatment. Due to the limited glue injection, different cap types require different limited molds.

[0008] The prior art 1 adopts the method of Y-axis working arm and X-axis working arm, which has redundant structure, occupies a large space, requires constant displacement adjustment, and has a slow production speed.

[0009] Therefore, the present invention provides a glue injection machine for special-shaped covers with fast glue injection speed, stable glue injection trajectory running speed and uniform glue injection. Summary of the invention

[0010] The present invention provides a glue injection machine for special-shaped covers, which can effectively solve the above problems.

[0011] The present invention is achieved in that:

[0012] A glue injection machine for special-shaped caps, comprising a glue injection mechanical arm and a cap delivery platform located below for placing materials, wherein the cap delivery platforms are two in number and parallel to each other;

[0013] The glue injection robot arm includes a crossbeam spanning two cover delivery platforms.

[0014] Servo motors, 2 in number, are arranged in parallel and installed in the middle of the top of the beam;

[0015] A double-link structure and a glue injection gun, wherein the glue injection guns are in a plurality and are assembled in parallel on the double-link structure, the double-link structure is mechanically connected to the servo motor, and the servo motor drives the glue injection guns to circulate to achieve uniform glue injection.

[0016] As a further improvement, the double-link structure comprises a first support rod, a second support rod, and a third support rod; the first support rod is parallel to the crossbeam, the third support rod is in number, and the third support rod is mounted on the crossbeam, the second support rod is in number, divided into groups, each group has two, and the two second support rods are connected together end to end and then connected to the first support rod and the third support rod respectively;

[0017] The end of the third support rod is respectively connected to the servo motor and the pulley through the transmission belt; the first support rod is provided with a plurality of mounting holes for mounting the glue gun.

[0018] As a further improvement, the crossbeam comprises a plurality of support columns and mounting plates. The support columns are in a plurality of numbers and are divided into two groups, which are arranged on both sides of the two cap delivery platforms. A mounting plate is installed on the top of each group of support columns, so that the two mounting plates are parallel to each other.

[0019] A swing arm and a cylinder, wherein the swing arm spans between two mounting plates, and the front end of the swing arm is rotatably connected to one of the mounting plates, and the front end of the swing arm is fixedly connected to the output end of the cylinder, the cylinder is obliquely mounted on the mounting plate, and the rear end of the swing arm is overlapped on the other mounting plate.

[0020] As a further improvement, it also includes several clamping jaws for clamping and feeding materials and a circulating cover feeding unit, wherein the clamping jaws include a clamping jaw bracket and several claw plates, and several claw plates are equidistantly installed on the top of each clamping jaw bracket, and the number of clamping jaw brackets is symmetrically arranged on both sides of the cover feeding platform, so that the claw plates are exposed above the cover feeding platform to clamp the materials.

[0021] As a further improvement, the circulating cap feeding unit comprises a spline shaft, a bearing, a linkage bracket, a crank, and a servo motor;

[0022] The bottom end of each clamp bracket is connected by a spline shaft, and each spline shaft is provided with a plurality of bearings. The head ends of the plurality of spline shafts are connected in series by a linkage bracket, and a servo motor is installed on the other side of the linkage bracket. The output end of the servo motor is connected to the linkage bracket through a crank to drive the spline shaft to perform linear motion.

[0023] It also includes a number of spline pairs distributed on the spline shaft, which transmit torque as the spline shaft moves linearly.

[0024] As a further improvement, it also includes a power unit for controlling the opening and closing of the clamping jaws, which is symmetrically arranged on both sides of the clamping jaws to control the opening and closing of the clamping jaws, and the power unit includes a third servo motor, an eccentric cam, a bracket, a first support rod, a second support rod, and a crank;

[0025] The third servo motor is installed on the side of the cap feeding platform, and an eccentric cam is installed at the output end of the third servo motor;

[0026] A first support rod and a second support rod are fixed in parallel on the bracket, and the ends of the first support rod and the second support rod are matched with the spline pair on the spline shaft through the spline pair;

[0027] The eccentric cam is connected to the bracket via a crank, so that the third servo motor drives the bracket to deflect an angle.

[0028] As a further improvement, the circulating cover feeding unit further comprises a plurality of linear guide rails, which are respectively arranged on both sides of the bottom end of the linkage bracket.

[0029] As a further improvement, it also includes a discharging unit and a vertical drying furnace. The discharging unit is arranged at the rear end of the cover delivery platform, and the material is transferred to the vertical drying furnace located at the rear end of the cover delivery platform through the discharging unit.

[0030] As a further improvement, the discharging unit comprises a fixed plate arranged below the cover delivery platform;

[0031] A bearing seat and a feeding sprocket, wherein a number of the bearing seats are symmetrically arranged on a fixed plate, a shaft is used between the two bearing seats to connect a number of feeding sprockets in series, and the shaft is mechanically connected to the output end of the second servo motor;

[0032] A feeding chain, a clamp, and a second clamp. There are a number of feeding chains, the feeding chain is wound around the feeding sprocket, and each feeding chain is provided with a number of groups of clamps, each group has a clamp, which cooperates with the second clamp located on the cover feeding platform to realize that the clamp drives the second clamp to move back and forth to clamp the material that has been injected with glue.

[0033] As a further improvement, the claw plate is a square plate with clamping notches cut on both sides of the free end.

[0034] The beneficial effects of the present invention are:

[0035] ① The servo motor of the present invention receives the injection signal, accurately controls the rotation speed, and then controls the double-link structure to complete the cyclic reciprocating motion according to different injection trajectories, so that the injection gun can complete different injection trajectories and maintain a stable linear speed. Compared with the traditional robotic arm that needs to spend time to move or be forced to be mechanically restricted to complete different injection trajectories, the present invention directly uses the double-link structure to control the trajectory, taking into account flexibility and reducing displacement time, and the injection speed is fast without wasting time.

[0036] ② When the glue gun needs to be inspected and repaired, the present invention uses a cylinder to work, lift the swing arm, and the glue gun is also lifted accordingly. After the glue gun is away from the cover feeding platform, the glue head is exposed, which is convenient for cleaning the glue gun without disassembly and reinstallation. The inspection and repair efficiency is high. After the inspection and repair is completed, the operation is reversed, and the tail end of the swing arm is overlapped on another mounting plate to restore the initial position.

[0037] ③ The clamping jaws, circulating cover feeding unit, power unit, piercing head lifting unit and glue injection robot arm of the present invention all rely on servo motors to carry out chain reactions. The clamping jaws grab the material, and the circulating cover feeding unit then moves the material to the next position. After it is in place, the clamping jaws are released and return to the initial position. At the same time, the glue injection robot arm on the piercing head lifting unit descends to perform glue injection, thereby achieving rapid feeding and glue injection reactions, uniform movements, and improved production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 The figure is a top view of a glue injection machine for special-shaped covers provided by an embodiment of the present invention.

[0040] Figure 2 The present invention is a three-dimensional structural schematic diagram of a glue injection machine for special-shaped covers provided in an embodiment of the present invention.

[0041] Figure 3 The present invention provides a top view of a glue injection mechanical arm of a glue injection machine for special-shaped covers according to an embodiment of the present invention.

[0042] Figure 4 The present invention provides a partial structural schematic diagram of a discharging unit of a glue injection machine for special-shaped covers according to an embodiment of the present invention.

[0043] Figure 5 The present invention provides a schematic diagram of the principle of a glue injection mechanical arm of a glue injection machine for special-shaped covers according to an embodiment of the present invention.

[0044] Figure 6 The present invention provides a schematic diagram of the structure of a power unit of a glue injection machine for special-shaped covers.

[0045] Figure 7 The present invention is a schematic diagram of the structure of a piercing head lifting unit of a glue injection machine for special-shaped covers provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0047] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0048] Reference Figure 1-Figure 7 As shown, this embodiment provides a specific implementation method for a special-shaped cap glue injection machine, including a glue injection mechanical arm 10 and a cap delivery platform 20 located below for placing materials, wherein the cap delivery platform 20 has two pieces and is parallel to each other;

[0049] The glue injection robot arm 10 comprises a crossbeam 101 spanning across two cap delivery platforms 20.

[0050] Servo motors 102, two in number, are arranged in parallel and installed in the middle of the top of the beam 101;

[0051] The double-link structure 103 and the glue injection gun 104, the glue injection gun 104 is in a plurality and is assembled in parallel on the double-link structure 103, the double-link structure 103 and the servo motor 102 are mechanically connected, and the servo motor 102 drives the glue injection gun 104 to circulate to achieve uniform glue injection.

[0052] The material to be injected with glue is placed on the cover feeding platform 20. The material to be injected with glue here refers to the special-shaped cover. The servo motor 102 of the present invention receives the injection signal, accurately controls the rotation speed, and then controls the double-link structure 103 to complete the cyclic reciprocating motion according to different injection trajectories, so that the glue injection gun 104 can complete different injection trajectories and maintain a stable linear speed. Compared with the traditional robot arm that needs to spend time to move or is forced to be restricted by the machinery to complete different injection trajectories, the present invention directly uses the double-link structure 103 to control the trajectory, taking into account flexibility and reducing displacement time, and the injection speed is fast without wasting time.

[0053] Specifically, the double-link structure 103 includes a first support rod 131, a second support rod 132, and a third support rod 133; the first support rod 131 is parallel to the crossbeam 101, the third support rod 133 is in two numbers, and the third support rod 133 is assembled on the crossbeam 101, the second support rod 132 is in a plurality of numbers, divided into two groups, each group has two, and the two second support rods 132 are connected together end to end and then connected to the first support rod 131 and the third support rod 133 respectively by rotation;

[0054] The transmission belt 134 , the end of the third support rod 133 is respectively connected to the servo motor 102 and the pulley through the transmission belt 134 .

[0055] Furthermore, the first support rod 131 is provided with a plurality of mounting holes 104 for mounting a glue gun.

[0056] That is to say, the servo motor 102 is used as the power, and the transmission belt 134 transmits the power, thereby driving the second support rod 132 to change its angle, and the glue injection gun mounted on the first support rod 131 also changes as the first support rod 131 rotates.

[0057] Among them, the structure of the glue injection gun is as follows: the crossbeam 101 includes a plurality of support columns 111 and a mounting plate 112. The support columns 111 are in a plurality of numbers and are divided into two groups, which are arranged on both sides of the two cover delivery platforms 20. The top of each group of support columns 111 is equipped with a mounting plate 112, so that the two mounting plates 112 are parallel to each other.

[0058] The swing arm 113 and the cylinder 114, the swing arm 113 spans between two mounting plates 112, and the front end of the swing arm 113 is rotatably connected to one of the mounting plates 112, and the front end of the swing arm 113 is fixedly connected to the output end of the cylinder 114, the cylinder 114 is obliquely installed on the mounting plate 112, and the rear end of the swing arm 113 is overlapped on the other mounting plate 112.

[0059] When the glue gun needs to be inspected, the cylinder 114 is used to work, the swing arm 113 is lifted, and the glue gun is also lifted accordingly. After the glue gun is away from the cover feeding platform 20, the glue head is exposed, which is convenient for cleaning the glue gun without disassembly and reinstallation, and the inspection efficiency is high. After the inspection is completed, the operation is reversed, and the tail end of the swing arm 113 is overlapped on another mounting plate 112 to restore the initial position.

[0060] The present invention also includes a plurality of clamping jaws 30 and a circulating cover feeding unit 40 for clamping and feeding materials, wherein the clamping jaws 30 include a clamping jaw bracket 301 and a plurality of claw plates 302, and each clamping jaw bracket 301 is equipped with a plurality of claw plates 302 at equal distances on the top, and there are two clamping jaw brackets 301, which are arranged on both sides of the cover feeding platform 20 and are symmetrically arranged so that the claw plates 302 are exposed above the cover feeding platform 20 to clamp the materials. After the relatively arranged claw plates 302 clamp the materials, they are sent to the next position by the circulating cover feeding unit 40, and then the claw plates 302 are released to restore the original position through the circulating cover feeding unit 40.

[0061] In one specific embodiment, the claw plate 302 is a square plate with clamping openings cut on both sides of the free end. The shape of the clamping opening includes but is not limited to a semicircle, an incomplete quadrilateral, an incomplete ellipse, etc. As long as the outer contour of the special-shaped cover is similar to the clamping opening, the claw plate 302 can grasp the special-shaped cover. Because the claw plate 302 has clamping openings on both sides, the processing is simple and a large number of special-shaped covers can be clamped.

[0062] In one specific embodiment, the claw plate 302 is a square plate with a clamping opening at the free end, and the number is one or more, which can grab the special-shaped covers individually or in batches to solve the batch feeding problem.

[0063] The present invention further comprises a piercing head lifting unit 80 located below the glue injection robot arm 10, the piercing head lifting unit 80 comprising a second eccentric cam 801, a connecting bracket 802, a guide rail 803, and a piercing head 804. The connecting bracket 802 is vertically fixed to the bottom end surface of the swing arm 113 through the guide rail 803. The second eccentric cam 801 is located above the connecting bracket 802 and the two are in contact, so that the rotation of the second eccentric cam 801 triggers the connecting bracket 802 to slide up and down in the guide rail 803. A plurality of piercing heads 804 are fixed on the bottom end surfaces opposite to the connecting bracket 802 and the second eccentric cam 801.

[0064] Further, the circulating cap feeding unit 40 comprises a spline shaft 401, a bearing 402, a linkage bracket 403, a crank 404, and a servo motor 405;

[0065] The bottom end of each clamping jaw bracket 301 is connected through a spline shaft 401, and each spline shaft 401 is provided with a plurality of bearings 402. The head ends of the plurality of spline shafts 401 are connected in series by a linkage bracket 403. A servo motor 405 is installed on the other side of the linkage bracket 403. The output end of the servo motor 405 is connected to the linkage bracket 403 through a crank 404 to drive the spline shaft 401 to perform linear motion.

[0066] It also includes a plurality of spline pairs 406 , which are distributed on the spline shaft 401 and transmit torque as the spline shaft 401 moves linearly.

[0067] Furthermore, the cyclic cover feeding unit 40 further includes a plurality of linear guide rails 407 , which are respectively arranged on both sides of the bottom end of the linkage bracket 403 to limit the moving direction of the linkage bracket 403 .

[0068] Furthermore, the present invention further comprises a power unit 70 for controlling the opening and closing of the clamping jaws, which is symmetrically arranged on both sides of the clamping jaws 30 to control the opening and closing of the clamping jaws 30, and further comprises a power unit 70 for controlling the opening and closing of the clamping jaws, which is symmetrically arranged on both sides of the clamping jaws 30 to control the opening and closing of the clamping jaws 30, and the power unit 70 comprises a third servo motor 701, an eccentric cam 702, a bracket 703, a first support rod 704, a second support rod 705, and a crank 706;

[0069] The third servo motor 701 is installed on the side of the cap feeding platform 20, and an eccentric cam 702 is installed at the output end of the third servo motor 701;

[0070] A first support rod 704 and a second support rod 705 are fixed in parallel on the bracket 703, and the ends of the first support rod 704 and the second support rod 705 are matched with the spline pair 406 on the spline shaft 401 through the spline pair;

[0071] The eccentric cam 702 is connected to the bracket 703 via a crank 706, so that the third servo motor 701 drives the bracket 703 to deflect an angle;

[0072] That is, the third servo motor 701 is operated to drive the first support rod 704 and the second support rod 705 to rotate and change the angle, and then the spline shaft 401 is driven to rotate by the connecting spline pair to realize the rotation and opening and closing of the clamping jaws 30 fixed on the spline shaft 401 to clamp materials in batches.

[0073] In summary, in order to improve production efficiency, the clamp 30, the circulating cover feeding unit 40, the power unit 70, the piercing head lifting unit 80 and the glue injection robot arm 10 all rely on the servo motor to carry out a chain reaction. The clamp 30 grabs the material, and the circulating cover feeding unit 40 then moves the material to the next position. After it is in place, the clamp 30 is released and returns to the initial position. At the same time, the glue injection robot arm 10 descends on the piercing head lifting unit 80 to perform the glue injection work, so as to achieve rapid feeding and glue injection reactions, uniform movements, and improved production efficiency.

[0074] The present invention also includes a discharging unit 50 and a vertical drying oven 60. The discharging unit 50 is arranged at the rear end of the cover delivery platform 20. The material is transferred to the vertical drying oven 60 at the rear end of the cover delivery platform 20 through the discharging unit 50 to dry and shape the special-shaped cover that has been injected with glue.

[0075] The discharging unit 50 includes a fixed plate 501 disposed below the cap feeding platform 20;

[0076] A bearing seat 502 and a feeding sprocket 503, wherein two bearing seats 502 are symmetrically arranged on the fixed plate 501, and a shaft is used between the two bearing seats 502 to connect a plurality of feeding sprockets 503 in series, and the shaft is mechanically connected to the output end of the second servo motor;

[0077] A feeding chain 503, a clamp 504, and a second clamp 505. There are a plurality of feeding chains 503, and the feeding chains 503 are wound around the feeding sprocket 503. Each feeding chain 503 is provided with a plurality of groups of clamps 504, and each group has 2 clamps 504, which cooperate with the second clamp 505 located on the cover feeding platform 20, so that the clamp 504 drives the second clamp 505 to move back and forth to clamp the material that has been injected with glue, and send the materials into the vertical drying furnace 60 one by one.

[0078] Furthermore, a guide block 506 connected in series via a second shaft is provided in the second clamping jaw 505 on each cover delivery platform 20 to guide the direction of the special-shaped cover and enable the special-shaped cover to fall into the vertical oven 60 accurately.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A special-shaped cover glue injection machine, characterized in that: It comprises a glue injection mechanical arm (10) and a cover delivery platform (20) located below for placing materials, wherein the cover delivery platforms (20) are two in number and are parallel to each other; The glue injection robot arm (10) comprises a crossbeam (101) spanning two cap delivery platforms (20). Two servo motors (102) are arranged in parallel and installed in the middle of the top of the beam (101); A double connecting rod structure (103) and a glue injection gun (104), wherein the glue injection guns (104) are of a plurality and are mounted in parallel on the double connecting rod structure (103), the double connecting rod structure (103) and the servo motor (102) are mechanically connected, and the servo motor (102) drives the glue injection guns (104) to circulate to achieve uniform glue injection.

2. A special-shaped cover glue injection machine as claimed in claim 1, characterized in that: The double-link structure (103) comprises a first support rod (131), a second support rod (132), and a third support rod (133); the first support rod (131) is parallel to the crossbeam (101); there are two third support rods (133), and the third support rods (133) are mounted on the crossbeam (101); there are a plurality of second support rods (132), which are divided into two groups, each group having two second support rods; the two second support rods (132) are connected together end to end by rotation, and then are respectively connected to the first support rod (131) and the third support rod (133); A transmission belt (134), the end of the third support rod (133) is respectively connected to the servo motor (102) and the pulley through the transmission belt (134); the first support rod (131) is provided with a plurality of mounting holes (104) for mounting a glue gun.

3. The special-shaped cover glue injection machine according to claim 1, characterized in that: The crossbeam (101) comprises a plurality of support columns (111) and a mounting plate (112); the support columns (111) are in a plurality and divided into two groups, which are arranged on both sides of the two cap delivery platforms (20); a mounting plate (112) is mounted on the top of each group of support columns (111), so that the two mounting plates (112) are parallel to each other; A swing arm (113) and a cylinder (114), wherein the swing arm (113) spans between two mounting plates (112), and the front end of the swing arm (113) is rotatably connected to one of the mounting plates (112), and the front end of the swing arm (113) is fixedly connected to the output end of the cylinder (114), the cylinder (114) is obliquely mounted on the mounting plate (112), and the rear end of the swing arm (113) is overlapped on the other mounting plate (112).

4. The special-shaped cover glue injection machine according to claim 1, characterized in that: It also includes a plurality of clamping jaws (30) for clamping and feeding materials and a circulating cover feeding unit (40), wherein the clamping jaws (30) include a clamping jaw bracket (301) and a plurality of jaw plates (302), and a plurality of jaw plates (302) are equidistantly mounted on the top of each clamping jaw bracket (301), and there are two clamping jaw brackets (301), which are arranged on both sides of the cover feeding platform (20) and are symmetrically arranged so that the jaw plates (302) are exposed above the cover feeding platform (20) to clamp materials.

5. A glue injection machine for special-shaped covers as claimed in claim 4, characterized in that: The circulating cover feeding unit (40) comprises a spline shaft (401), a bearing (402), a linkage bracket (403), a crank (404), and a servo motor (405); The bottom end of each clamping jaw bracket (301) is connected through a spline shaft (401), and each spline shaft (401) is provided with a plurality of bearings (402). The head ends of the plurality of spline shafts (401) are connected in series by a linkage bracket (403), and a servo motor (405) is installed on the other side of the linkage bracket (403). The output end of the servo motor (405) is connected to the linkage bracket (403) through a crank (404) to drive the spline shaft (401) to perform linear motion; It also comprises a spline pair (406). The spline pairs (406) are in a certain number and are distributed on the spline shaft (401). The spline pairs (406) transmit torque as the spline shaft (401) moves linearly.

6. A glue injection machine for special-shaped covers as claimed in claim 5, characterized in that: It also includes a power unit (70) for controlling the opening and closing of the clamping jaws, which is symmetrically arranged on both sides of the clamping jaws (30) to control the opening and closing of the clamping jaws (30), and the power unit (70) includes a third servo motor (701), an eccentric cam (702), a bracket (703), a first support rod (704), a second support rod (705), and a crank (706); The third servo motor (701) is installed on the side of the cap feeding platform (20), and an eccentric cam (702) is installed at the output end of the third servo motor (701); A first support rod (704) and a second support rod (705) are fixed in parallel on the bracket (703), and the ends of the first support rod (704) and the second support rod (705) are matched with the spline pair 406 on the spline shaft 401 through a spline pair; The eccentric cam (702) is connected to the bracket (703) via a crank (706) so that the third servo motor (701) drives the bracket (703) to perform angular deflection.

7. The glue injection machine for special-shaped covers according to claim 5, characterized in that: The cyclic cover feeding unit (40) further comprises a plurality of linear guide rails (407) which are respectively arranged on both sides of the bottom end of the linkage bracket (403).

8. The special-shaped cover glue injection machine according to claim 1, characterized in that: It also includes a discharging unit (50) and a vertical drying furnace (60), wherein the discharging unit (50) is arranged at the rear end of the cover delivery platform (20), and the material is conveyed to the vertical drying furnace (60) located at the rear end of the cover delivery platform (20) through the discharging unit (50).

9. A glue injection machine for special-shaped covers as claimed in claim 8, characterized in that: The discharging unit (50) comprises a fixing plate (501) arranged below the cover delivery platform (20); A bearing seat (502) and a feeding sprocket (503), wherein two bearing seats (502) are symmetrically arranged on the fixed plate (501), a shaft is used between the two bearing seats (502) to connect a plurality of feeding sprockets (503) in series, and the shaft is mechanically connected to the output end of the second servo motor; A feeding chain (503), a clamping piece (504), and a second clamping claw (505), wherein the feeding chain (503) is wound around the feeding sprocket (503), and each feeding chain (503) is provided with a plurality of groups of clamping pieces (504), each group having two clamping pieces (504), which cooperate with the second clamping claw (505) located on the cover feeding platform (20) so as to realize that the clamping piece (504) drives the second clamping claw (505) to move back and forth in a cycle to clamp the material that has been injected with glue.

10. The special-shaped cover glue injection machine according to claim 5, characterized in that: The claw plate (302) is a square plate with clamping notches cut on both sides of the free end.

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