A plastic can end welding machine

Abstract

This utility model relates to the field of plastic can end welding machines, and in particular to a plastic can end welding machine. The machine includes a welding torch mounted on the execution end of a linear feed mechanism; the linear feed mechanism is mounted on a flat plate; the flat plate is rotatably mounted on a hinge plate; the flat plate is connected to a reciprocating swing mechanism mounted on the hinge plate; the hinge plate is connected to an angle drive assembly for driving the hinge plate to rotate; the angle drive assembly is mounted on a lifting mechanism. This machine can precisely adapt to the arc-shaped weld bead of the end cap, achieving uniform weld filling, and can flexibly adjust the welding torch's contact angle and the equipment height, effectively avoiding problems such as incomplete or missed welds.

Description

Technical Field

[0001] This utility model relates to the field of plastic can end welding machines, and in particular to a plastic can end welding machine. Background Technology

[0002] Plastic cans, with their advantages of corrosion resistance, light weight, and controllable cost, are widely used in various fields such as chemical raw material storage, food packaging, and liquid transportation. The welding process between the end cap and the cylinder is the core link in plastic can production, and its welding quality directly determines the can's sealing performance, structural strength, and service life. Currently, the mainstream process in the industry is plastic granule extrusion welding. Molten plastic granules are filled into the butt weld between the end cap and the cylinder using a welding torch to achieve a fixed connection. This process places strict requirements on the stability of the welding torch's feed, angle adaptability, and the uniformity of welding pressure.

[0003] Existing automated welding equipment mostly uses linear guides to feed the welding torch. Some equipment has added simple angle adjustment components, but the overall structural design still has limitations: the linear feed mechanism and the swing mechanism lack coordinated design, making it difficult to adapt to the continuous welding requirements of the arc weld bead of the end cap; angle adjustment mostly adopts manual knobs or a single drive structure, which has low adjustment accuracy and is cumbersome to operate; the lifting mechanism and the angle drive component are independent of each other, and the adjustment process lacks linkage, resulting in insufficient flexibility when adapting to tanks of different specifications.

[0004] The aforementioned structural design flaws lead to key problems in the practical application of existing welding equipment: the linear feed and reciprocating oscillation of the welding torch are not coordinated, making it impossible to evenly fill the arc-shaped weld bead, resulting in uneven weld thickness and large strength fluctuations; the welding torch angle adjustment is not precise enough, making it difficult to closely fit weld beads with different curvatures, easily leading to quality hazards such as incomplete welds and missed welds; the lifting mechanism and angle drive component work independently, making adjustments time-consuming when adapting to plastic cans of different heights and diameters, resulting in poor equipment versatility, ultimately leading to unstable welding quality, low production efficiency, and inability to meet the needs of large-scale production. It is urgent to solve the above problems by optimizing the overall structural design of the welding machine. Utility Model Content

[0005] To address the problem that the existing welding torch's linear feed and reciprocating oscillation motion are not coordinated, resulting in uneven filling of the arc weld bead and causing uneven weld thickness and large strength fluctuations, this utility model provides a plastic can head welding machine.

[0006] To solve the above problems, the technical solution adopted by this utility model is as follows: A plastic can head welding machine includes a welding torch mounted on the execution end of a linear feed mechanism. The linear feed mechanism is mounted on a flat plate. The flat plate is rotatably mounted on a hinge plate. The flat plate is connected to a reciprocating swing mechanism mounted on the hinge plate. An angle drive assembly is connected to the hinge plate and is used to drive the hinge plate to rotate. The angle drive assembly is mounted on a lifting mechanism. This plastic can head welding machine, through the coordinated design of the welding torch, linear feed mechanism, reciprocating swing mechanism, angle drive assembly, and lifting mechanism, can accurately adapt to the arc-shaped weld bead of the head, achieving uniform weld filling. It also allows for flexible adjustment of the welding torch's contact angle and equipment height, effectively avoiding problems such as incomplete or missed welds, improving equipment versatility, simplifying operation, shortening adjustment time, and balancing welding quality stability and production efficiency.

[0007] Preferably, the reciprocating oscillation mechanism includes a motor; the motor is mounted on a support plate; the support plate is mounted on a hinge plate; a drive roller is connected to the output end of the motor; drive blades are fixedly installed on the outer wall of the drive roller; and two clamping rollers are installed on the bottom surface of the plate in conjunction with the drive blades. This reciprocating oscillation mechanism has a simple and compact structure, is easy to install and maintain. The motor directly drives the drive roller to rotate, and the drive blades, in conjunction with the two clamping rollers, drive the plate to oscillate precisely around the hinge plate, thereby achieving uniform coverage of the arc-shaped weld bead by the welding torch. It features high transmission efficiency, controllable oscillation amplitude, effectively ensuring uniform weld filling and improving welding quality.

[0008] Preferably, the drive blade comprises two helical blades with opposite rotation directions; the two helical blades are connected end to end. This drive blade adopts a design of two helical blades with opposite rotation directions and connected end to end. When the motor drives it, the alternating thrust of the two drive blades can drive the plate to swing smoothly back and forth. The swing amplitude is precisely controllable, the transmission is smooth and without jamming, effectively ensuring the uniform coverage of the arc weld bead by the welding torch, improving the consistency of weld filling and welding quality.

[0009] Preferably, a circular tube is fixedly installed in the center of the top surface of the hinge plate; a cylinder is fixedly installed in the center of the bottom surface of the plate; the cylinder is rotatably installed inside the circular tube. This structure, through the precise rotational cooperation of the circular tube and the cylinder, provides a stable connection, smooth rotation, and minimal wear, providing stable support for the reciprocating oscillation of the plate, ensuring precise and controllable oscillation, thereby ensuring uniform coverage of the arc-shaped weld bead by the welding torch and improving the consistency of weld filling.

[0010] Preferably, the linear feed mechanism includes a slide plate serving as the actuator and guide rods mounted on the left and right sides of the plate. The slide plate is slidably mounted on the guide rods. The bottom surface of the slide plate is connected to the push rod of the first electric push rod. The motor end of the first electric push rod is mounted on the plate. The welding torch is mounted on the slide plate. This linear feed mechanism has a simple structure and reliable transmission. The guide rods on both sides provide stable guidance for the slide plate. With the drive of the first electric push rod, it can accurately control the linear displacement of the welding torch, ensuring smooth and unbiased feeding. This ensures consistent pressure between the welding torch and the weld bead, effectively improving the uniformity of weld filling and welding accuracy. Furthermore, it is convenient to install and maintain.

[0011] Preferably, the lifting mechanism includes a flatbed cart; a scissor lift assembly is mounted on the flatbed cart; a platform is mounted on the scissor lift assembly; and a hinge plate is hinged to the platform. This lifting mechanism achieves flexible movement with the help of the flatbed cart, and the scissor lift assembly drives the platform to rise and fall smoothly. It has a wide adjustment range, strong load-bearing capacity, and the hinge design of the hinge plate to the platform adapts to angle adjustment requirements. It can accommodate plastic tanks of different heights and specifications, and provides stable support for welding operations, improving equipment versatility and welding stability.

[0012] Preferably, side plates are fixedly installed at the center of both sides of the hinge plate; the side plates are hinged to the center of both sides of the platform; the angle drive assembly includes a hinge seat one fixedly installed on the platform; the motor end of an electric push rod two is hinged to the hinge seat one; the push rod of the electric push rod two is hinged to the hinge seat two; the hinge seat two is fixedly installed on the bottom surface of the hinge plate. This structure is stable and has direct transmission. Through the hinge between the side plates and the platform, combined with the extension and retraction drive of the electric push rod two, the rotation of the hinge plate around the hinge point can be precisely controlled, thereby flexibly adjusting the angle of the welding torch. The action is smooth and without jamming, with high adjustment accuracy, allowing the welding torch to closely fit weld beads with different curvatures, effectively avoiding the problems of incomplete welding and missing welding, and improving welding quality and adaptability.

[0013] Preferably, the welding torch includes a second motor; the second motor is mounted on a flat plate via a vertical plate; the second motor is connected to a screw conveyor; a welding shoe is installed at the end of the screw conveyor away from the second motor; a feeding hopper is provided on the screw conveyor; and an electric heating element is fitted onto the screw conveyor. This welding torch has a compact structure and stable installation. The screw conveyor driven by the second motor provides precise material feeding, the feeding hopper facilitates convenient material supply, and the electric heating element ensures uniform and complete melting of the plastic granules. Combined with the welding shoe, it tightly adheres to the weld bead, effectively avoiding uneven feeding or insufficient melting. The welding torch exhibits strong welding stability and dense weld filling. Furthermore, it is easy to maintain and operate, significantly improving welding quality and efficiency.

[0014] As can be seen from the above technical solutions, the advantages of this utility model are as follows: The plastic can end welding machine, through the coordinated design of the welding gun, linear feed mechanism, reciprocating swing mechanism, angle drive component and lifting mechanism, can not only accurately adapt to the arc weld bead of the end cap and achieve uniform weld filling, but also flexibly adjust the welding gun contact angle and equipment height, effectively avoid the problems of incomplete welding and missing welding, improve the versatility of the equipment, simplify operation, shorten adjustment time, and take into account both welding quality stability and production efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solution of this utility model, the drawings used in the description 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.

[0016] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0017] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0018] Figure 3 This is a front view structural diagram of the present invention.

[0019] Figure 4 for Figure 3 Enlarged diagram of point A in the middle.

[0020] Figure 5 This is a schematic diagram of the drive roller and drive blade structure of this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1-Welding torch, 2-Linear feed mechanism, 3-Plate, 4-Reciprocating swing mechanism, 5-Hinge plate, 6-Lifting mechanism, 7-Motor 1, 8-Support plate, 9-Drive roller, 10-Clamping roller, 11-Drive blade, 12-Electric push rod 2; 101-Motor II, 102-Screw Conveyor, 103-Welding Shoe, 104-Feeding Bucket, 105-Electric Heating Tube; 201-Slide Plate, 202-Guide Rod, 203-Electric Push Rod I; 301-Cylinder, 302-Upright Plate; 501-Side Plate, 502-Hinge Seat II, 503-Round Tube; 601-Flatbed Cart, 602-Scissor Lift Assembly, 603-Platform, 604-Hinge Seat I; 1101-Screw Blade. Detailed Implementation

[0022] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0023] like Figure 1-5 As shown, a plastic can end-welding machine includes a welding torch 1, which is mounted on the execution end of a linear feed mechanism 2. The linear feed mechanism 2 is mounted on a flat plate 3. The flat plate 3 is rotatably mounted on a hinge plate 5. The flat plate 3 is connected to a reciprocating swing mechanism 4 mounted on the hinge plate 5. The hinge plate 5 is connected to an angle drive assembly, which drives the hinge plate 5 to rotate. The angle drive assembly is mounted on a lifting mechanism 6. The welding torch 1 includes a second motor 101. The second motor 101 is mounted on the flat plate 3 via a vertical plate 302. The second motor 101 is connected to a screw conveyor 102. A welding shoe 103 is mounted on the end of the screw conveyor 102 away from the second motor 101. A feeding hopper 104 is provided on the screw conveyor 102. An electric heating tube 105 is sleeved on the screw conveyor 102.

[0024] This plastic can end-welding machine utilizes a coordinated design of welding torch 1, linear feed mechanism 2, reciprocating oscillating mechanism 4, angle drive assembly, and lifting mechanism 6. This design allows for precise adaptation to the curved weld bead of the end-cap, ensuring uniform weld filling. It also allows for flexible adjustment of the welding torch 1's contact angle and equipment height, effectively avoiding incomplete or missed welds and improving equipment versatility. Furthermore, it simplifies operation, shortens adjustment time, and balances welding quality stability with production efficiency. The welding torch 1 has a compact structure and stable installation. Motor 2 101 drives a screw conveyor 102 for precise material feeding, and the feeding hopper 104 facilitates material supply. The electric heating element 105 ensures uniform and sufficient melting of plastic granules. Combined with the welding shoe 103, it tightly adheres to the weld bead, effectively preventing uneven feeding or insufficient melting. This results in strong welding stability, dense weld filling, and easy maintenance and operation, significantly improving welding quality and efficiency.

[0025] like Figure 4 and Figure 5 As shown, the reciprocating oscillating mechanism 4 includes a motor 7; the motor 7 is mounted on a support plate 8; the support plate 8 is mounted on a hinge plate 5; the output end of the motor 7 is connected to a drive roller 9; a drive blade 11 is fixedly installed on the outer wall of the drive roller 9; two clamping rollers 10 are installed on the bottom surface of the plate 3 in conjunction with the drive blade 11. The drive blade 11 includes two helical blades 1101 with opposite rotation directions; the two helical blades 1101 are connected end to end.

[0026] The reciprocating oscillating mechanism 4 has a simple and compact structure, and is easy to install and maintain. It directly drives the drive roller 9 to rotate via motor 7. Through the coordinated transmission of the drive blade 11 and two clamping rollers, it stably drives the plate 3 to reciprocate precisely around the hinge plate 5, thereby achieving uniform coverage of the arc-shaped weld bead by the welding torch 1. It features high transmission efficiency, controllable oscillation amplitude, effectively ensuring uniform weld filling and improving welding quality. The drive blade 11 adopts a design of two helical blades 1101 with opposite rotation directions and connected end-to-end. When driven by motor 7, the alternating thrust of the two drive blades 11 drives the plate 3 to reciprocate smoothly. The oscillation amplitude is precisely controllable, and the transmission is smooth and without jamming, effectively ensuring uniform coverage of the arc-shaped weld bead by the welding torch 1, improving weld filling consistency and welding quality.

[0027] The hinge plate 5 has a circular tube 503 fixedly installed in the center of its top surface; the plate 3 has a cylinder 301 fixedly installed in the center of its bottom surface; and the cylinder 301 is rotatably installed inside the circular tube 503. This structure, through the precise rotational cooperation between the circular tube 503 and the cylinder 301, provides a stable connection, smooth rotation, and minimal wear, providing stable support for the reciprocating oscillation of the plate 3, ensuring precise and controllable oscillation, and thus ensuring uniform coverage of the arc-shaped weld bead by the welding torch 1, improving the consistency of weld filling.

[0028] In the above configuration, the linear feed mechanism 2 includes a slide plate 201 serving as the execution end of the linear feed mechanism 2 and guide rods 202 installed on the left and right sides of the plate 3; the slide plate 201 is slidably mounted on the guide rods 202; the bottom surface of the slide plate 201 is connected to the push rod of the electric push rod 203; the motor end of the electric push rod 203 is mounted on the plate 3; the welding torch 1 is mounted on the slide plate 201. The lifting mechanism 6 includes a flatbed 601; a scissor lift assembly 602 is mounted on the flatbed 601; a platform 603 is mounted on the scissor lift assembly 602; and a hinge plate 5 is hinged to the platform 603. Side plates 501 are fixedly installed at the middle of both sides of the hinge plate 5; the side plates 501 are hinged to the middle of both sides of the platform 603; the angle drive assembly includes a hinge seat 604 fixedly installed on the platform 603; the motor end of the electric push rod 12 is hinged to the hinge seat 604; the push rod of the electric push rod 12 is hinged to the hinge seat 502; the hinge seat 502 is fixedly installed on the bottom surface of the hinge plate 5. This structure is stable and has direct transmission. Through the hinge between the side plates 501 and the platform 603, combined with the extension and retraction drive of the electric push rod 12, the rotation of the hinge plate 5 around the hinge point can be precisely controlled, thereby flexibly adjusting the angle of the welding torch 1. The action is smooth and without jamming, and the adjustment accuracy is high. It can make the welding torch 1 closely fit the weld bead with different curvatures, effectively avoiding the problems of incomplete welding and missing welding, and improving the welding quality and adaptability.

[0029] The linear feed mechanism 2 has a simple structure and reliable transmission. Guide rods 202 on both sides provide stable guidance for the slide plate 201. Driven by the electric push rod 203, it can precisely control the linear displacement of the welding torch 1, ensuring smooth and unbiased feeding. This guarantees consistent pressure between the welding torch 1 and the weld bead, effectively improving weld filling uniformity and welding accuracy. Installation and maintenance are also convenient. The lifting mechanism 6 achieves flexible movement using the flatbed 3. The scissor lift assembly 602 drives the platform 603 to rise and fall smoothly. It has a wide adjustment range and strong load-bearing capacity. The hinged design of the hinge plate 5 and the platform 603 adapts to angle adjustment requirements, accommodating plastic tanks of different heights and providing stable support for welding operations, thus improving equipment versatility and welding stability.

[0030] A method of using a plastic can end-welding machine, comprising the following steps: S1. Pre-positioning and fixing of the workpiece; pre-welding and positioning of the plastic can body and the end cap to be welded to ensure that the weld beads at the joint are aligned; S2. Equipment position debugging; control the scissor lifting assembly 602 of the lifting mechanism 6 to adjust the height of the platform 603 so that the welding shoe 103 of the welding gun 1 is initially close to the workpiece weld bead; then start the electric push rod 12 of the angle drive assembly to push the hinge plate 5 to rotate around the hinge point of the platform 603 and adjust the initial angle between the welding gun 1 and the weld bead; then drive the slide plate 201 to slide along the guide rod 202 through the electric push rod 203 of the linear feed mechanism 2 to adjust the welding shoe 103 to a safe waiting position 5-8cm away from the weld bead; S3. Pre-welding preparation and parameter setting: Add suitable plastic welding granules to the granule feeding hopper 104 of the welding torch 1; start the electric heating tube 105 to heat, start the motor 101 of the welding torch 1 to drive the screw conveyor 102 to discharge residual impurities in the torch until the granules are stably extruded, and then turn off the motor 101; clean the dust, oil and other impurities on the surface of the workpiece weld by controlling the speed of the motor 101; control the workpiece welding speed to 1-2 arcs per second. S4. Automatic welding operation; Restart motor 101 to continue extruding the granules; Start motor 7 of reciprocating oscillating mechanism 4 to drive the drive roller 9 to rotate. Through two spiral blades 1101 with opposite rotation directions, push the plate 3 to oscillate back and forth around the rotating pair of cylinder 301 and round tube 503 to ensure that the welding shoe 103 evenly covers the weld bead; During the welding process, the position of the slide plate 201 is finely adjusted in real time by electric push rod 203 to ensure that the bonding pressure between the welding shoe 103 and the weld bead is stable. S5. Monitoring and adjustment during welding: During the welding process, monitor the temperature of the welding torch 1, the feeding speed of the screw conveyor 102, and the rotation speed of the motor 17 in real time. If problems such as incomplete welding or uneven extrusion of granules occur, adjust the corresponding parameters immediately.

[0031] This method boasts a clear workflow and simple operation. Through a series of interconnected steps—precise workpiece pre-positioning, multi-dimensional equipment debugging, thorough pre-welding preparation, automated welding operations, and real-time monitoring and adjustment—it fully leverages the synergistic advantages of each mechanism. This ensures precise welding torch contact, stable material feeding, and uniform oscillation, promptly avoiding issues such as incomplete welds and uneven material feeding. This effectively guarantees consistent weld quality while enhancing welding automation and efficiency, adapting to the welding needs of various plastic can sizes. The welding speed is precisely controlled at 1-2 arcseconds per second using motor 101, with convenient adjustment and stable speed. This accurately adapts to the filling requirements of curved weld bead patterns, avoiding insufficient filling due to excessive speed or over-melting due to excessive speed, effectively ensuring uniform weld filling and consistent weld quality.

[0032] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A plastic can end welding machine comprising a welding torch (1), characterized in that, The welding torch (1) is installed on the execution end of the linear feed mechanism (2); the linear feed mechanism (2) is installed on the plate (3); the plate (3) is rotatably mounted on the hinge plate (5); the plate (3) is connected to a reciprocating swing mechanism (4) mounted on the hinge plate (5); the hinge plate (5) is connected to an angle drive assembly, which is used to drive the hinge plate (5) to rotate; the angle drive assembly is mounted on the lifting mechanism (6).

2. The plastic can head welding machine according to claim 1, characterized in that, The reciprocating swing mechanism (4) includes a motor (7); the motor (7) is mounted on a support plate (8); the support plate (8) is mounted on a hinge plate (5); the output end of the motor (7) is connected to a drive roller (9); a drive blade (11) is fixedly installed on the outer wall of the drive roller (9); two clamping rollers (10) are installed on the bottom surface of the plate (3) in conjunction with the drive blade (11).

3. The plastic can head welding machine according to claim 2, characterized in that, The driving blade (11) includes two helical blades (1101) with opposite directions of rotation; the two helical blades (1101) are connected end to end.

4. The plastic can head welding machine according to claim 3, characterized in that, A circular tube (503) is fixedly installed in the middle of the top surface of the hinge plate (5); a cylindrical column (301) is fixedly installed in the middle of the bottom surface of the flat plate (3); the cylindrical column (301) is rotatably installed inside the circular tube (503).

5. The plastic can head welding machine according to claim 4, characterized in that, The linear feed mechanism (2) includes a slide plate (201) serving as the execution end of the linear feed mechanism (2) and guide rods (202) installed on the left and right sides of the plate (3); the slide plate (201) is slidably mounted on the guide rods (202); the bottom surface of the slide plate (201) is connected to the push rod of the electric push rod (203); the motor end of the electric push rod (203) is mounted on the plate (3); the welding torch (1) is mounted on the slide plate (201).

6. The plastic can head welding machine according to claim 5, characterized in that, The lifting mechanism (6) includes a flatbed (601); a scissor lift assembly (602) is installed on the flatbed (601); a platform (603) is installed on the scissor lift assembly (602); and a hinge plate (5) is hinged to the platform (603).

7. The plastic can head welding machine according to claim 6, characterized in that, Side plates (501) are fixedly installed in the middle of both sides of the hinge plate (5); the side plates (501) are hinged to the middle of both sides of the platform (603); the angle drive assembly includes a hinge seat (604) fixedly installed on the platform (603); the motor end of the electric push rod (12) is hinged to the hinge seat (604); the push rod of the electric push rod (12) is hinged to the hinge seat (502); the hinge seat (502) is fixedly installed on the bottom surface of the hinge plate (5).

8. The plastic can head welding machine according to claim 7, characterized in that, The welding torch (1) includes a second motor (101); the second motor (101) is mounted on a flat plate (3) via a vertical plate (302); the second motor (101) is connected to a screw conveyor (102); a welding shoe (103) is installed at the end of the screw conveyor (102) away from the second motor (101); a feeding hopper (104) is provided on the screw conveyor (102); and an electric heating tube (105) is fitted on the screw conveyor (102).

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