A plastic can and a welding device for its production

Abstract

The present invention belongs to the field of plastic welding technology, and relates to a plastic can and a welding device for its production, including a plastic can body, the inner wall of the plastic can body is fused with a polymer barrier film by heat during injection molding, the can mouth of the plastic can body is connected to a plastic cover body by welding, the cover edge of the plastic cover body is protruded in a direction perpendicular to the plastic can body with an embedded part close to the inner wall of the plastic can body, the plastic cover body is protruded in a direction perpendicular to the plastic can body with a cover opening away from the plastic can body, the side of the cover opening close to the plastic can body has an inclined drainage part, and the cover opening of the plastic cover body is sleeved with a connection cover that can be opened and closed multiple times. The polymer barrier film on the inner wall of the plastic can body is used to prevent the penetration of substances such as oxygen, carbon dioxide, and water vapor, and the plastic can body and the plastic cover body can be classified and stacked when not welded, which is convenient for storage and transportation; and the connection cover can be opened and used repeatedly, which is convenient for sealing liquids.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic welding, and in particular relates to a plastic can and a welding device for producing the same. Background Art

[0002] Plastics are favored as packaging materials due to their light weight, high design flexibility and cost-effectiveness. Especially in the beverage packaging industry, plastic cans are an emerging alternative that aims to reduce the use of metal materials and improve the sustainability of packaging.

[0003] The design of plastic cans must meet strict food safety standards, ensuring that the materials are non-toxic and corrosion-resistant, and have good sealing properties to prevent the contents from leaking or being contaminated by the outside world. In addition, structural strength, light weight, ease of opening, and aesthetics must also be considered.

[0004] However, due to process problems, the body and lid of the plastic can cannot be integrally molded and demoulded. They need to be welded to achieve sealing after separate production. Therefore, plastic welding technology is a key link in the production of plastic cans, which directly affects the quality of the finished product, production efficiency and cost control. Ultrasonic welding is a processing technology that uses high-frequency sound wave energy to connect two or more plastic materials. However, according to different product requirements, the welding device needs to be designed specifically. Summary of the invention

[0005] The purpose of the present invention is to overcome the disadvantages of the prior art and provide an improved plastic can and a welding device for its production.

[0006] In order to solve the above technical problems, the present invention provides a plastic can, comprising a plastic can body, the inner wall of which is fused with a polymer barrier film by heat during injection molding; the mouth of the plastic can body gradually shrinks toward the inner bottom of the plastic can body, from which it can be seen that the plastic can body is a cone with a larger top and a smaller bottom; the outer side of the mouth of the plastic can body is provided with a can edge, and the mouth of the plastic can body is connected to a plastic cover body by welding, the outer side of the plastic cover body is provided with a cover edge, the lower side of the cover edge of the plastic cover body is welded and connected to the upper side of the cover edge of the plastic can body, the cover edge of the plastic cover body is protruded in a direction perpendicular to the plastic can body with an embedded portion close to the inner wall of the plastic can body, the embedded portion of the plastic cover body is embedded in the plastic can body and connected to the plastic can body by welding, the upper side of the plastic cover body is provided with a cover opening away from the plastic can body protruding in a direction perpendicular to the plastic can body, the side of the cover opening close to the plastic can body is provided with an inclined drainage portion 1, the drainage portion 1 can be chamfered or rounded, and the cover opening of the plastic cover body is sleeved with a connecting cover that can be opened and closed multiple times.

[0007] Preferably, the polymer barrier film includes a barrier film center surface for fusing to the inner bottom side of the plastic can body and a barrier film overlapping sheet connected to the outer side of the barrier film center surface for fusing to the inner wall of the plastic can body, the side edges of the barrier film overlapping sheet are widened by 5 mm, the barrier film overlapping sheet is suitable for folding along the outer side of the barrier film center surface and overlapping with the side edges of the remaining barrier film overlapping sheets, the barrier film overlapping sheet has a 3 mm folding portion on the side away from the barrier film center surface, and the 3 mm folding portion on the barrier film is suitable for folding to the upper side of the edge of the plastic can body.

[0008] Preferably, a collar portion is also included. The inner wall of the plastic tank body near the tank mouth has a collar portion perpendicular to the plastic tank body. When the support portion inside the plastic tank body supports another plastic tank body, the inner side of the collar portion contacts and cooperates with the outer side of the plastic tank body supported by the support portion.

[0009] Preferably, a connecting ring is also included, and the plastic cover body is hollowed out along the embedded portion on one side facing the plastic tank body, the cover opening of the plastic cover body is located at the eccentric part of the plastic cover body, and the cover opening of the plastic cover body is connected to the connecting ring on the side close to the plastic tank body by welding, and the upper part of the connecting ring has an embedded portion that fits tightly with the drainage portion 1 on the cover opening, and the side of the connecting ring away from the cover opening is provided with a gasket located between the embedded portion on the plastic cover body and the ring portion on the plastic tank body, and the gasket can be but is not limited to an aluminum foil sheet or a thin sheet of plastic material, wherein the cost of the aluminum foil sheet is higher than that of the thin sheet of plastic material, but the aluminum foil sheet has a better barrier effect on liquids, and the thin sheet of plastic material has stronger weldability and structural properties; the side of the connecting ring away from the cover opening has a drainage portion 2 with the same structure as the drainage portion 1, and the drainage portion 2 is close to the inner wall of the plastic tank body.

[0010] Preferably, the inner diameter of the connecting ring is between the diameter of the cross section of the plastic tank body at one-quarter of the height and the diameter of the cross section of the plastic tank body at three-quarters of the height, the height of the supporting portion is between above the bottom of the inner bottom of the plastic tank body and below the embedded portion of the plastic cover body, and when the supporting portion inside the plastic tank body supports another plastic tank body, the connecting ring contacts and cooperates with the outer side of the plastic tank body supported by the supporting portion.

[0011] The present invention provides a welding device for producing the above-mentioned plastic cans, which also includes a frame, an ultrasonic welding machine and an electric turntable are installed on the upper rear side of the frame, the vibrator of the ultrasonic welding machine is located above the eccentric position of the electric turntable, and a circle of support cylinders for accommodating the plastic can body is connected to the upper side of the electric turntable. The support cylinders correspond to the vibrators of the ultrasonic welding machine, and there are four support cylinders. Two support frames are arranged on the upper part of the frame, and a first unloading barrel and a second unloading barrel are respectively arranged on the two support frames. The second unloading barrel is located between the first unloading barrel and the ultrasonic welding machine, and the first unloading barrel is used to load The connecting ring and the gasket on the connecting ring, the lower barrel 2 is used to load the plastic cover body, the lower ends of the lower barrels 1 and 2 are provided with unloading components, and a loading component is provided between the lower barrels 1 and 2. The loading component is used to load the connecting ring and the plastic cover body into the lower barrels 1 and 2 respectively, and the unloading component is used to unload the connecting ring and the plastic cover body in the lower barrels 1 and 2 into the plastic tank body. A guide cylinder 1 for penetrating the inner hole of the connecting ring and a guide cylinder 2 for penetrating the upper cover opening of the plastic cover are respectively provided in the lower barrels 1 and 2 and between the loading component, and the guide cylinder 1 and the guide cylinder 2 are rotationally symmetrical with the electric turntable as the center.

[0012] Preferably, the loading assembly includes a support plate, a support plate is connected between the lower material barrel 1 and the lower material barrel 2, a double-axis motor is installed on the support plate, the upper and lower output shafts of the double-axis motor are connected to a rotating shaft, the upper end of the upper rotating shaft is connected to a rotating rod 1, both ends of the rotating rod 1 are connected to an arc-shaped limiting rod 1, the two arc-shaped limiting rods 1 are rotationally symmetrically arranged around the rotating shaft, one of the arc-shaped limiting rods 1 slides through the upper end of the lower material barrel 1 and the guide barrel 1, the other arc-shaped limiting rod 1 slides through the upper end of the lower material barrel 2 and the guide barrel 2, the lower material barrel The outer sides of the first and second material barrels are connected with guide rails, and the first and second material barrels are both provided with a straight limit rod 1 which slides through the guide rails. The straight limit rod 1 on the lower material barrel 1 slides through the upper ends of the lower material barrel 1 and the guide barrel 1, and the straight limit rod 1 on the lower material barrel 2 slides through the upper ends of the lower material barrel 2 and the guide barrel 2. A group of connecting rods 1 are respectively provided between the two straight limit rods 1 and the two ends of the rotating rod 1, and each group of connecting rods 1 includes two connecting rods 1 which are respectively hinged on the straight limit rod 1 and the rotating rod 1, and the two connecting rods 1 in the same group are hinged.

[0013] The cam is provided with a plurality of movable parts, and the movable parts are respectively provided with a plurality of movable parts, and the movable parts are respectively provided with a plurality of movable parts, and the movable parts are respectively provided with a plurality of movable parts, and the movable parts are respectively provided with a plurality of movable parts, and the movable parts are respectively provided with a plurality of movable parts.

[0014] Preferably, a material discharging assembly at a lower end of the discharging barrel includes a rotating rod 2, the lower end of the discharging barrel 1 is slidably provided with a discharging rod and a stopping rod located below the discharging rod, a spring surrounding the stopping rod is connected between the stopping rod and the discharging barrel 1, and the spring is used to reset the stopping rod after sliding; one end of the discharging rod located in the discharging barrel 1 is a wedge-shaped end with an inclined surface facing downward, a rack 1 is connected to the discharging rod, and the lower end of the discharging barrel 1 is rotatably provided with a gear meshing with the rack 1, a rack 2 meshing with the gear is connected to the stopping rod, the rack 1 and the rack 2 are respectively meshed with the upper and lower sides of the gear, a wedge-shaped frame is connected to the lower side of the stopping rod, and a resistance rod suitable for contacting and cooperating with the wedge-shaped frame is connected to the supporting cylinder; the material discharging assembly at the lower end of the discharging barrel 2 has the same structure as the material discharging assembly at the lower end of the discharging barrel, and the material discharging assembly at the lower end of the discharging barrel 2 is suitable for discharging the plastic cover body.

[0015] The present invention overcomes the shortcomings of the prior art and can achieve the following beneficial effects:

[0016] 1. The polymer barrier film on the inner wall of the plastic tank body is used to prevent the penetration of substances such as oxygen, carbon dioxide, and water vapor. The plastic tank body and the plastic cover body can be classified and stacked when not welded, which is convenient for storage and transportation; and the connecting cover can be opened and used repeatedly to facilitate the sealing of the liquid.

[0017] 2. The collar part forms a compression and tension resistant structure in different positions and directions inside the plastic tank body, which increases toughness and structural stability. In addition, the collar part can be used to clamp the outside of the plastic tank body, which can also make the stacked plastic tank bodies more stable. When welding the plastic cover body, the gasket can be welded to the collar part, and the connecting ring can be used to achieve liquid drainage.

[0018] 3. Through the guide cylinder 1 and the guide cylinder 2, the holes on the adapter and the plastic cover are automatically aligned during the continuous feeding process, which improves the subsequent assembly efficiency, reduces the error rate, eliminates the manual alignment step, and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an exploded view of the plastic tank body and the plastic cover body of the present invention.

[0020] Figure 2 Schematic diagram of the polymer barrier film of the present invention.

[0021] Figure 3 It is a schematic diagram of two stacked plastic covers of the present invention, wherein the plastic covers are fully cut away.

[0022] Figure 4 It is a cross-sectional view of the plastic tank body, the plastic cover body, the connecting cover and the snap-on cover of the present invention.

[0023] Figure 5 It is a schematic diagram of two stacked plastic tank bodies of the present invention, wherein the plastic tank bodies are fully cut away.

[0024] Figure 6 For the present invention Figure 5 Enlarged view of point A.

[0025] Figure 7 The figure is an exploded view of the plastic tank body, the plastic cover body and the connecting ring of the present invention.

[0026] Figure 8 It is a cross-sectional view of the plastic cover and the connecting ring of the present invention.

[0027] Fig. 9 For the present invention Figure 8 Enlarged view of point B.

[0028] Fig.10 It is a schematic diagram of two stacked adapters of the present invention, wherein the adapters are fully cutaway.

[0029] Fig.11 It is a schematic diagram of the assembly of the welding device of the present invention.

[0030] Fig.12 It is a cross-sectional view of lower barrel 1 and lower barrel 2 of the present invention.

[0031] Fig.13 It is a cross-sectional view of a guide cylinder 1 of the present invention.

[0032] Fig.14 It is a partial schematic diagram of the connecting ring, the feeding rod and the blocking rod of the present invention.

[0033] Fig.15 It is a partial schematic diagram of the second feeding cylinder, the second guide cylinder and the plastic cover body of the present invention.

[0034] The marks in the accompanying drawings provided by the present invention are:

[0035] 011-barrier film center plane, 012-barrier film overlapping sheet, 013-folding part, 1-plastic tank body, 10-tank edge, 11-support part, 12-ring part, 2-plastic cover body, 20-cover edge, 21-cover opening, 22-drainage part 1, 23-embedded part, 31-connecting cover, 41-connecting ring, 410-drainage part 2, 42-gasket;

[0036] 51-frame, 52-ultrasonic welding machine, 53-electric turntable, 54-support cylinder, 61-support frame, 620-guide rail, 621-unloading cylinder one, 622-unloading cylinder two, 631-guide cylinder one, 632-guide cylinder two, 64-support plate, 65-dual-axis motor, 66-rotating rod one, 67-arc-shaped limit rod one, 68-one-line limit rod one, 69-connecting rod one, 71-rotating rod two, 72-arc-shaped limit rod two, 73-one-line limit rod two, 74-connecting rod two, 81-unloading rod, 82-rack one, 83-gear, 84-stop rod, 85-spring, 86-rack two, 87-wedge frame, 88-resistance rod. DETAILED DESCRIPTION

[0037] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0038] In addition, the terms "first", "second" and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. It should be noted that the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0039] A plastic can, such as Figure 1-Figure 10As shown, it includes a plastic can body 1, the inner wall of the plastic can body 1 is fused with a polymer barrier film by heat during its injection molding. The polymer barrier film can effectively prevent the penetration of substances such as oxygen, carbon dioxide, and water vapor, which is very important for extending the shelf life of products such as food, beverages, and medicines; the mouth of the plastic can body 1 gradually shrinks toward the inner bottom of the plastic can body 1, so that the plastic can body 1 is a cone with a larger top and a smaller bottom, and the cross-section of the plastic can body 1 can be circular or square. In this embodiment, the cross-section of the plastic can body 1 is circular, and the inner wall of the plastic can body 1 has a support portion 11 away from the mouth of the can. When the conical plastic can bodies 1 are put together, the support portion 11 in the plastic can body 1 supports the remaining plastic can bodies 1, so as to facilitate the stacking and placement of the plastic can bodies 1 (such as Figure 5 As shown); the outer side of the mouth of the plastic tank body 1 is provided with a tank brim 10, and the tank mouth of the plastic tank body 1 is connected with a plastic cover body 2 by welding. The outer side of the plastic cover body 2 is provided with a cover brim 20, and the lower side of the cover brim 20 of the plastic cover body 2 is welded to the upper side of the tank brim 10 of the plastic tank body 1, and the cover brim 20 of the plastic cover body 2 is protruded in a direction perpendicular to the plastic tank body 1 and close to the inner wall of the plastic tank body 1 with an embedding portion 23, and the embedding portion 23 of the plastic cover body 2 is embedded in the plastic tank body 1 and connected to the plastic tank body 1 by welding, so as to reuse the contact between the cover brim 20 and the tank brim 10, increase the structural stability and sealing performance of the plastic cover body 2 when welded to the plastic tank body 1, and can also reduce the protrusion of the cover brim 20 and the tank brim 10, and compensate for it through the embedding portion 23, so as to increase the aesthetics, and the plastic cover body 2 is perpendicular to the plastic The can body 1 is provided with a cover opening 21 which is away from the plastic can body 1, and the cover opening 21 is provided with an inclined drainage portion 22 on one side close to the plastic can body 1. When the plastic can body 1 and the plastic cover body 2 are tilted, the drainage portion 22 is utilized to make the liquid in the plastic can body 1 closer to the cover opening 21 and flow out from the cover opening 21, so as to facilitate people to finish drinking the beverage. The drainage portion 22 can be chamfered or rounded. In the present embodiment, the drainage portion 22 is rounded. In addition, when the plastic cover body 2 has not been welded to the plastic can body 1, the height difference formed between the cover opening 21 and the embedded portion 23 enables the embedded portion 23 of the upper plastic cover body 2 to surround the cover opening 21 of the lower plastic cover body 2, and the upper end of the cover opening 21 of the lower plastic cover body 2 can contact the drainage portion 22 at the cover opening 21 of the upper plastic cover body 2, so that multiple plastic covers 2 can be stacked and placed (such as Figure 3 As shown), in order to facilitate storage and transportation, the cover opening 21 of the plastic cover body 2 is provided with a connecting cover 31 that can be opened and closed multiple times, and the connecting cover 31 can be repeatedly used on the plastic cover body 2.

[0040] like Figure 2As shown, the polymer barrier film includes a barrier film center surface 011 for fusing to the inner bottom side of the plastic can body 1 and a barrier film overlapping sheet 012 connected to the outer side of the barrier film center surface 011 for fusing to the inner wall of the plastic can body 1. The side of the barrier film overlapping sheet 012 is widened by 5mm. The barrier film overlapping sheet 012 is suitable for folding along the outer side of the barrier film center surface 011 and overlapping with the side of the other barrier film overlapping sheets 012. The barrier film overlapping sheet 012 is away from the barrier film center surface 0 One side of 11 has a 3mm folding portion 013, and the 3mm folding portion 013 on the barrier film is suitable for folding to the upper side of the edge 10 of the plastic can body 1. When the polymer barrier film is added to the outside of the plastic can body 1, the polymer barrier film can be placed by a robot, so that the bimolecular barrier film is folded into a cylindrical shape and wrapped around the inner mold core used for injection molding of the plastic can body 1 by static electricity, and then the polymer barrier film is fused by heat when the plastic tank body 1 is injection molded. The specific operation is not elaborated here.

[0041] like Figure 5 and Figure 6 As shown, a collar portion 12 is also included. The inner wall of the plastic tank body 1 near the tank mouth has a collar portion 12 perpendicular to the plastic tank body 1, thereby forming a compression and tension-resistant structure in different positions and directions, thereby increasing the toughness and structural stability of the plastic tank body 1. When the support portion 11 in the plastic tank body 1 supports another plastic tank body 1, the inner side of the collar portion 12 will also contact and cooperate with the outer side of the plastic tank body 1 supported by the support portion, thereby increasing the toughness and structural stability, and further utilizing the collar portion 12 to make the stacked plastic tank bodies 1 more stable.

[0042] like Figure 7-10As shown, it also includes a connecting ring 41. The plastic cover body 2 is hollowed out along the embedded portion 23 on one side facing the plastic can body 1. On the basis of not affecting the welding function, the weight and processing cost are reduced, which is convenient for users to use and saves resources. The cover opening 21 of the plastic cover body 2 is located at the eccentric position of the plastic cover body 2. The user can use the cover opening 21 to drink the beverage in the plastic can body 1 more comfortably. The cover opening 21 of the plastic cover body 2 is connected to the connecting ring 41 on the side close to the plastic can body 1 by welding. The upper part of the connecting ring 41 has a fitting portion that is tightly fitted with the drainage portion 22 on the cover opening 21, and the fitting portion of the connecting ring 41 is convenient for welding connection with the cover opening 21. The side of the connecting ring 41 away from the cover opening 21 is provided with a The gasket 42 between the embedded portion 23 on the body 2 and the collar portion 12 on the plastic tank body 1 is welded and pressed between the plastic tank body 1 and the plastic cover 2 when the plastic cover 2 is welded to the plastic tank body 1 to prevent liquid from flowing into the hollow structure of the plastic cover 2. Even if the plastic cover 2 has a hollow structure, the gasket 42 can facilitate liquid to flow out from the inner hole of the connecting ring 41 and the cover opening 21 of the plastic cover 2, thereby improving the sealing performance. The gasket 42 can be, but is not limited to, an aluminum foil or a thin sheet of plastic material. The cost of the aluminum foil is higher than that of the thin sheet of plastic material, but the aluminum foil has a better barrier effect on liquid, while the thin sheet of plastic material has stronger weldability and structural properties. The specific selection can be made according to the needs to achieve the barrier of liquid; the side of the connecting ring 41 away from the cover 21 has a drainage part 210 with the same structure as the drainage part 1 22, both of which are for facilitating the outflow of liquid, and the drainage part 210 is close to the inner wall of the plastic tank body 1 (cooperating with the cover 21 at the eccentric position, which not only facilitates the outflow of liquid, but also increases the comfort of use), the drainage part 210 is located at the edge of the inner hole of the connecting ring 41, and when the connecting rings 41 are stacked, the fitting part on the upper part of the lower connecting ring 41 will correspond to the drainage part 210 on the lower part of the upper connecting ring 41, so as to facilitate the stacking of the connecting rings 41; in addition, the embedded part 23 on the plastic cover body 2 will also be welded to the ring part 12 on the plastic tank body 1, so as to cleverly The prestress of the structure after welding is further improved by the sleeve portion 12, and the various steps are interrelated and coordinated with each other to achieve a variety of different effects. It should be further explained that, without welding the plastic cover 2 and the connecting ring 41, the plastic tank body 1 can still be sold and used separately, and without welding the connecting ring 41, the plastic tank body 1 and the plastic cover 2 can be used as a second set of sales and use solutions. Similarly, the welded combination of the plastic tank body 1, the plastic cover 2 and the connecting ring 41 is used as a third set of sales and use solutions. The different product solutions correspond to different usage situations, and provide users with more choices, utilize the market adaptability of the product, and facilitate production and inventory management.

[0043] As a preferred embodiment of the present invention, the inner diameter of the collar portion 12 is between the diameter of the cross section of the plastic tank body 1 at one quarter of its height and the diameter of the cross section of the plastic tank body 1 at three quarters of its height, and the height of the support portion 11 is between the upper part of the bottom of the plastic tank body 1 and the lower part of the embedded portion 23 of the plastic cover body 2. When the support portion 11 in the plastic tank body 1 supports another plastic tank body 1, the collar portion 12 contacts and cooperates with the outer side of the plastic tank body 1 supported by the support portion 11; that is, when the support portion 11 is higher, The higher the height that the support portion 11 can support the plastic can body 1, the easier it is for the supported plastic can body 1 to detach from the plastic can body 1 below it, and the smaller the inner diameter of the ring portion 12, thereby ensuring that the ring portion 12 limits the position of the plastic can body 1 and increasing the area of ​​the sealing film that the convex ring can support; in addition, it should be explained that the height of the ring portion 12 remains unchanged, and the support portion 11 is always located below the ring portion 12, so there is no need to additionally adjust the design of the plastic cover body 2, the ring portion 12 and the gasket 42.

[0044] A welding device for producing the above-mentioned plastic cans, such as Figure 11-Figure 15As shown, it includes a frame 51, an ultrasonic welding machine 52 and an electric turntable 53 are installed on the upper rear side of the frame 51, the vibrator of the ultrasonic welding machine 52 is located above the eccentric position of the electric turntable 53, and a circle of support cylinders 54 for accommodating the plastic tank body 1 is connected to the upper side of the electric turntable 53, and the support cylinders 54 correspond to the vibrators of the ultrasonic welding machine 52. In this embodiment, there are four support cylinders 54, and the plastic tank body 1 is placed on the support cylinders 54, and the connecting ring 41, the gasket 42, and the plastic cover body 2 are placed in the plastic tank body 1 in sequence, the collar part 12 supports the gasket 42, and the fitting part on the upper part of the connecting ring 41 is fitted with the drainage part 22 at the lower part of the cover 21, and the embedded part 23 presses the gasket 42 on the support part 11. The electric turntable 53 is controlled to drive the assembled plastic can body 1 to rotate to the bottom of the vibrator of the ultrasonic welding machine 52 through the support cylinder 54, and then the vibrator is controlled to move downward to press the plastic cover body 2 and convert the input high-frequency electrical energy signal into high-frequency mechanical vibration energy and transmit it to the surface of the plastic cover body 2, so that the cover edge 20 and the embedded part 23 of the plastic cover body 2 are respectively welded to the can edge 10 and the inner wall of the plastic can body 1 through ultrasonic wave, and the drainage part 22 of the plastic cover body 2 is also welded to the embedded part of the connecting ring 41, and the gasket 42 is welded between the embedded part 23 of the plastic cover body 2 and the ring part 12 on the plastic can body 1, so as to realize the welding operation of the plastic can. Furthermore, two support frames 61 are provided on the upper part of the frame 51, and the two The support frame 61 is provided with a first unloading barrel 621 and a second unloading barrel 622, respectively. The second unloading barrel 622 is located between the first unloading barrel 621 and the ultrasonic welding machine 52. The first unloading barrel 621 is used to load the connecting ring 41 and the gasket 42 on the connecting ring 41. When the electric turntable 53 drives the plastic can body 1 to rotate to the bottom of the first unloading barrel 621 through the support cylinder 54, the connecting ring 41 and the gasket 42 thereon are unloaded into the plastic can body 1 through the first unloading barrel 621. The second unloading barrel 622 is used to load the plastic cover body 2. When the electric turntable 53 drives the plastic can body 1 equipped with the connecting ring 41 to rotate to the bottom of the second unloading barrel 622 through the support cylinder 54, the plastic cover body 2 is unloaded onto the plastic can body 1 through the second unloading barrel 622. The lower ends of the lower barrel 621 and the lower barrel 622 are both provided with a material discharge component, and a material loading component is provided between the lower barrel 1 621 and the lower barrel 2 622. The material loading component is used to load the connecting ring 41 and the plastic cover body 2 into the lower barrel 1 621 and the lower barrel 2 622 respectively, and the material discharge component is used to discharge the connecting ring 41 and the plastic cover body 2 in the lower barrel 1 621 and the lower barrel 2 622 into the plastic can body 1. A guide cylinder 1 631 for penetrating the inner hole of the connecting ring 41 and a guide cylinder 2 632 for penetrating the upper cover opening 21 of the plastic cover body 2 are respectively provided in the lower barrel 1 621 and the lower barrel 2 622 and between the material discharge component, and the guide cylinder 1 631 and the guide cylinder 2 632 are rotationally symmetrical with the electric turntable 53 as the center, so after the connecting ring 41 is discharged,When the electric turntable 53 drives the plastic can body 1 equipped with the connecting ring 41 to rotate to the right below the unloading cylinder 622 through the supporting cylinder 54, the inner hole of the connecting ring 41 will correspond to the guide cylinder 632, and under the action of the guide cylinder 632, the drainage part 22 of the upper cover opening 21 of the plastic cover body 2 after unloading will contact and cooperate with the fitting part on the connecting ring 41, so as to facilitate the subsequent welding operation; it should be emphasized that the present welding device can overcome the problem of insufficient precision in the existing vertical unloading system, especially when processing parts that require precise positioning, such as a disc with specific hole positions, it is difficult to achieve automatic alignment of the hole positions during the continuous unloading process, resulting in low efficiency of subsequent assembly, increased error rate, and even the need for manual positioning, resulting in reduced work efficiency.

[0045] like Figure 11-13As shown, the loading assembly includes a support plate 64, a support plate 64 is connected between the lower barrel 1 621 and the lower barrel 2 622, a double-axis motor 65 is installed on the support plate 64, the upper and lower output shafts of the double-axis motor 65 are connected to the rotating shaft, the upper end of the upper rotating shaft is connected to a rotating rod 1 66, and both ends of the rotating rod 1 66 are connected to an arc-shaped limiting rod 1 67, and the two arc-shaped limiting rods 1 67 are rotationally symmetrically arranged around the rotating shaft, one of the arc-shaped limiting rods 1 67 slides through the upper end of the lower barrel 1 621 and the guide barrel 1 631, and the other arc-shaped limiting rod 1 67 slides through the upper end of the lower barrel 2 622 and the guide barrel 2 632, through the arc-shaped limiting rod Rod 1 67 supports guide cylinder 1 631 in lower barrel 1 621 and guide cylinder 2 632 in lower barrel 2 622. The outer sides of lower barrel 1 621 and lower barrel 2 622 are connected with guide rails 620. Lower barrel 1 621 and lower barrel 2 622 are both provided with straight limit rod 1 68 through the guide rails 620. The straight limit rod 1 68 on lower barrel 1 621 slides through the upper ends of lower barrel 1 621 and guide cylinder 1 631. The straight limit rod 1 68 on lower barrel 2 622 slides through the upper ends of lower barrel 2 622 and guide cylinder 2 632. The straight limit rod 1 68 cooperates with the arc limit rod 1 67 to support lower barrel 1 The guide cylinder 1 631 in 621 and the guide cylinder 2 632 in the unloading cylinder 2 622 are limited and supported to prevent the guide cylinder 1 631 and the guide cylinder 2 632 from sliding and misaligning. A group of connecting rods 1 69 are respectively arranged between the two one-shaped limit rods 1 68 and the two ends of the rotating rod 1 66. Each group of connecting rods 1 69 includes two connecting rods 1 69 respectively hinged on the one-shaped limit rod 1 68 and the rotating rod 1 66. The two connecting rods 1 69 of the same group are hinged. When loading is required, the guide cylinder 1 631 and the guide cylinder 2 632 are first fixed by tools or manually, and then the dual-axis motor 65 is controlled to drive the rotating shaft to drive the rotating rod 1 66 to rotate, and the rotating rod 1 66 will drive the two The arc limit rod 1 67 rotates and gradually disengages from the guide cylinder 1 631 and the guide cylinder 2 632, and the rotating rod 1 66 also pulls the straight limit rod 1 68 outward through the connecting rod 1 69, so that the two straight limit rods 1 68 gradually disengage from the guide cylinder 1 631 and the guide cylinder 2 632. At this time, the connecting ring 41 can be passed through the guide cylinder 1 631 to complete the loading of the connecting ring 41, and the plastic cover body 2 can be passed through the guide cylinder 2 632 to complete the loading of the plastic cover body 2, and then the dual-axis motor 65 is controlled to drive the rotating shaft to drive the rotating rod 1 66 to rotate in the opposite direction, so that the arc limit rod 1 67 and the straight limit rod 1 68 can limit and support the guide cylinder 1 631 and the guide cylinder 2 632 again.

[0046] like Figure 11-13As shown, the feeding assembly also includes a rotating rod 2 71, and the rotating shaft below is connected to the rotating rod 2 71. Both ends of the rotating rod 2 71 are connected to arc-shaped limit rods 2 72. The two arc-shaped limit rods 2 72 are rotationally symmetrically arranged around the rotating shaft, one of the arc-shaped limit rods 2 72 is suitable for sliding through the lower part of the lower barrel 1 621 and the guide barrel 1 631, and the other arc-shaped limit rod 2 72 is suitable for sliding through the lower part of the lower barrel 2 622 and the guide barrel 2 632. The arc-shaped limit rod 1 67 and the arc-shaped limit rod 2 72 are arranged relatively to each other. When it is necessary to rotate the arc-shaped limit rod 1 67 to loosen the guide barrel 1 631 in the lower barrel 1 621 and the guide barrel 2 632 in the lower barrel 2 622, the dual-axis motor 65 The rotating shaft will drive the rotating rod 2 71 to rotate, and the rotating rod 2 71 will drive the two arc-shaped limiting rods 2 72 to rotate and snap into the guide cylinder 1 631 and the guide cylinder 2 632 respectively, and then the arc-shaped limiting rod 1 67 will rotate to release the guide cylinder 1 631 and the guide cylinder 2 632, and the lower barrel 1 621 and the lower barrel 2 622 are both provided with a straight-line limiting rod 2 73 through the guide rail 620 for sliding, and the straight-line limiting rod 2 73 on the lower barrel 1 621 is suitable for sliding through the lower part of the lower barrel 1 621 and the guide cylinder 1 631, and the straight-line limiting rod 2 73 on the lower barrel 2 622 is suitable for sliding through the lower part of the lower barrel 2 622 and the guide cylinder 2 632, and the two straight-line limiting rods 2 73 are respectively connected with the rotating rod 2 71 A set of connecting rods 74 is provided between the two ends, and each set of connecting rods 74 includes two connecting rods 74 respectively hinged on the straight limit rod 73 and the rotating rod 71. The two connecting rods 74 of the same set are hinged. When the straight limit rod 68 gradually loosens the guide cylinder 631 and the guide cylinder 632, the rotating rod 71 will drive the two straight limit rods 73 to slide into the guide cylinder 631 and the guide cylinder 632 along the guide rail 620 through the connecting rod 74, thereby eliminating the step of fixing the guide cylinder 631 and the guide cylinder 632 by tools or manually. Overall feeding steps: the arc limit rod 67 and the straight limit rod 68 above both loosen the guide cylinder 631 and the guide cylinder 632. 32. When the arc limit rod 2 72 and the straight limit rod 2 73 at the bottom fix the guide cylinder 1 631 and the guide cylinder 2 632, the connecting ring 41 is put on the guide cylinder 1 631 for loading, and the plastic cover body 2 is put on the guide cylinder 2 632 for loading, and the connecting ring 41 and the plastic cover body 2 will first move down and fall on the arc limit rod 2 72 and the straight limit rod 2 73, and then the arc limit rod 2 72 and the straight limit rod 2 73 will release the guide cylinder 1 631 and the guide cylinder 2 632, and the arc limit rod 1 67 and the straight limit rod 1 68 will fix the guide cylinder 1 631 and the guide cylinder 2 632, so that the connecting ring 41 and the plastic cover body 2 will continue to move down to the unloading assembly to wait for unloading.

[0047] like Fig.14 and Fig.15As shown, the material discharge assembly at the lower end of the material discharge barrel 621 includes a rotating rod 71, and a material discharge rod 81 and a material blocking rod 84 located below the material discharge rod 81 are slidably provided at the lower end of the material discharge barrel 621. A spring 85 surrounding the material blocking rod 84 is connected between the material blocking rod 84 and the material discharge barrel 621. The spring 85 is used to reset the material blocking rod 84 after sliding. The end of the material discharge rod 81 located in the material discharge barrel 621 is a wedge-shaped end with an inclined surface facing downward, and the material blocking rod 84 blocks the material at the bottom. Below the square connecting ring 41, the blocking rod 84 is moved outward to loosen the lowermost connecting ring 41, and the unloading rod 81 is moved inward to block the second connecting ring 41 below and squeeze the lowermost connecting ring 41 through the wedge-shaped end, so as to realize the unloading of one connecting ring 41. The unloading rod 81 is connected to a rack 82, and the lower end of the unloading barrel 621 is rotatably provided with a gear 83 meshing with the rack 82, and the blocking rod 84 is connected to a rack 2 86 meshing with the gear 83, and the rack 82 and the rack The two racks 86 are respectively meshed with the upper and lower sides of the gear 83. The outward movement of the blocking rod 84 will drive the gear 83 to rotate through the rack 2 86, and the gear 83 will drive the rack 1 82 to drive the unloading rod 81 to move inward, thereby synchronously driving the blocking rod 84 and the unloading rod 81 to move toward each other for intermittent unloading. The lower side of the blocking rod 84 is connected to a wedge frame 87, and the support cylinder 54 is connected to a resistance rod 88 suitable for contacting and cooperating with the wedge frame 87. When the electric turntable 53 drives the support cylinder 54 to drive When the plastic can body 1 rotates to the position directly below the first unloading barrel 621, the abutting rod 88 on the supporting barrel 54 will squeeze the inner side of the wedge frame 87, and the wedge frame 87 will drive the blocking rod 84 to move outward, so as to automatically and synchronously realize the unloading operation of the connecting ring 41 after the plastic can body 1 is in place; the unloading assembly at the lower end of the second unloading barrel 622 has the same structure as the unloading assembly at the lower end of the first unloading barrel 621, and the unloading assembly at the lower end of the second unloading barrel 622 is suitable for unloading the plastic cover body 2 (such as Fig.15 ), the principle of the material discharge assembly at the lower end of the second material discharge barrel 622 is not further elaborated here, and a person skilled in the art can easily understand and implement the solution based on the context and the drawings in the specification.

[0048] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. They only express the preferred implementation modes of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention.

[0049] It should be pointed out that, for ordinary technicians in this field, several modifications, increases and decreases in quantity, improvements and substitutions can be made without departing from the concept of the present invention. Therefore, based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of the present invention.

Claims

1. A welding device for producing plastic cans, comprising a plastic can body (1), the inner wall of the plastic can body (1) being fused with a polymer barrier film by heat during injection molding; the mouth of the plastic can body (1) gradually narrows toward the inner bottom of the plastic can body (1), the inner wall of the plastic can body (1) having a support portion (11) away from the mouth; the outer side of the mouth of the plastic can body (1) having a can edge (10), the mouth of the plastic can body (1) being connected to a plastic cover body (2) by welding, the outer side of the plastic cover body (2) having a cover edge (20), the plastic cover body ( The cover edge (20) of the plastic can body (2) is welded to the can edge (10) of the plastic can body (1); the cover edge (20) of the plastic cover body (2) protrudes in a direction perpendicular to the plastic can body (1) and has an embedding portion (23) close to the inner wall of the plastic can body (1); the plastic cover body (2) has a cover opening (21) protruding in a direction perpendicular to the plastic can body (1) and away from the plastic can body (1); the cover opening (21) has an inclined drainage portion (22) on one side close to the plastic can body (1); and the cover opening (21) of the plastic cover body (2) is sleeved with a connecting cover (31) that can be opened and closed multiple times; The plastic tank body (1) further comprises a collar portion (12), wherein the collar portion (12) is perpendicular to the plastic tank body (1) at a position near the tank mouth of the inner wall of the plastic tank body (1), and when the support portion (11) in the plastic tank body (1) supports another plastic tank body (1), the inner side of the collar portion (12) will also contact and cooperate with the outer side of the plastic tank body (1) supported by the support portion (11); It is characterized in that The plastic cover (2) further comprises a connecting ring (41), wherein one side of the plastic cover (2) facing the plastic tank body (1) is hollowed out along the direction of the embedding portion (23), the cover opening (21) of the plastic cover (2) is located at an eccentric position of the plastic cover (2), and the side of the cover opening (21) of the plastic cover (2) close to the plastic tank body (1) is connected to the connecting ring (41) by welding, and the connecting ring (41) comprises an embedding portion that is tightly fitted with a drainage portion (22) on the cover opening (21). A gasket (42) is provided on the side of the connecting ring (41) away from the cover opening (21) and located between the embedding portion (23) on the plastic cover body (2) and the collar portion (12) on the plastic tank body (1); a drainage portion (410) having the same structure as the drainage portion (22) is provided on the side of the connecting ring (41) away from the cover opening (21); the drainage portion (410) is close to the inner wall of the plastic tank body (1), and is located at the edge of the inner hole of the connecting ring (41); The machine also comprises a frame (51), on which an ultrasonic welding machine (52) and an electric turntable (53) are mounted, the vibrator of the ultrasonic welding machine (52) being located above the eccentric position of the electric turntable (53), the upper side of the electric turntable (53) being connected to a circle of support cylinders (54) for accommodating the plastic can body (1), the support cylinders (54) corresponding to the vibrators of the ultrasonic welding machine (52), two support frames (61) being provided on the upper part of the frame (51), a first lower material cylinder (621) and a second lower material cylinder (622) being provided on the two support frames (61), the second lower material cylinder (622) being located between the first lower material cylinder (621) and the ultrasonic welding machine (52), the first lower material cylinder (621) being used for loading the connecting ring (41) and the gasket (42) on the connecting ring (41), the second lower material cylinder (622) being used for loading the plastic cover body (2), and the lower lower material cylinder (621) and the gasket (42) on the connecting ring (41) being used for loading the plastic cover body (2). The lower ends of the first material barrel (621) and the second material barrel (622) are both provided with a material lowering assembly, and a material loading assembly is provided between the first material barrel (621) and the second material barrel (622). The material loading assembly is used to load the connecting ring (41) and the plastic cover body (2) into the first material barrel (621) and the second material barrel (622) respectively, and the material lowering assembly is used to load the connecting ring (41) and the plastic cover body (2) into the first material barrel (621) and the second material barrel (622). The plastic cover body (2) is fed into the plastic can body (1), and guide cylinders 1 (631) for penetrating the inner hole of the connecting ring (41) and 2 (632) for penetrating the upper cover opening (21) of the plastic cover body (2) are respectively provided in the first feed cylinder (621) and the second feed cylinder (622) and between the feed assembly, and the first guide cylinder (631) and the second guide cylinder (632) are rotationally symmetrical with the electric turntable (53) as the center; The loading assembly includes a support plate (64), a support plate (64) is connected between a lower material barrel (621) and a lower material barrel (622), a double-axis motor (65) is installed on the support plate (64), the upper and lower output shafts of the double-axis motor (65) are connected to a rotating shaft, a rotating rod (66) is connected to the upper rotating shaft, and both ends of the rotating rod (66) are connected to an arc-shaped limit rod (67), and the two arc-shaped limit rods (67) are rotationally symmetrically arranged with the rotating shaft as the center, one of the arc-shaped limit rods (67) slides through the lower material barrel (621) and the guide barrel (631), and the other arc-shaped limit rod (67) slides through the lower material barrel (622) and the guide barrel (632), and the lower material barrel A straight limit rod (68) is slidably provided on the first (621) and the second (622) lower material barrel through the guide rail (620); the straight limit rod (68) on the first (621) lower material barrel slides through the first (621) lower material barrel and the guide cylinder (631); the straight limit rod (68) on the second (622) lower material barrel slides through the second (622) lower material barrel and the guide cylinder (632); a group of connecting rods (69) is provided between the two straight limit rods (68) and the two ends of the rotating rod (66); each group of connecting rods (69) includes two connecting rods (69) respectively hinged on the straight limit rod (68) and the rotating rod (66); the two connecting rods (69) in the same group are hinged.

2. A welding device for producing plastic cans according to claim 1, characterized in that: The polymer barrier film comprises a barrier film center surface (011) for fusing to the inner bottom side of a plastic can body (1) and a barrier film overlapping sheet (012) connected to the outer side of the barrier film center surface (011) for fusing to the inner wall of the plastic can body (1). The side of the barrier film overlapping sheet (012) is widened by 5 mm. The barrier film overlapping sheet (012) is suitable for folding along the outer side of the barrier film center surface (011) and overlapping with the side of the other barrier film overlapping sheets (012). The barrier film overlapping sheet (012) has a 3 mm folding portion (013) on the side away from the barrier film center surface (011). The 3 mm folding portion (013) on the barrier film is suitable for folding to the upper side of the can edge (10) of the plastic can body (1).

3. A welding device for producing plastic cans according to claim 2, characterized in that: The inner diameter of the connecting ring (41) is between the diameter of the cross section of the plastic tank body (1) at one quarter of its height and the diameter of the cross section of the plastic tank body (1) at three quarters of its height. The height of the supporting portion (11) is between the upper part of the bottom of the plastic tank body (1) and the lower part of the embedding portion (23) of the plastic cover body (2). When the supporting portion (11) in the plastic tank body (1) supports another plastic tank body (1), the collar portion (12) contacts and cooperates with the outer side of the plastic tank body (1) supported by the supporting portion (11).

4. A welding device for producing plastic cans according to claim 1, characterized in that: The loading assembly also includes a rotating rod 2 (71), the rotating rod 2 (71) is connected to the rotating shaft below, and arc-shaped limiting rods 2 (72) are connected to both ends of the rotating rod 2 (71). The two arc-shaped limiting rods 2 (72) are arranged rotationally symmetrically with the rotating shaft as the center, one arc-shaped limiting rod 2 (72) is suitable for sliding through the lower material barrel 1 (621) and the guide barrel 1 (631), and the other arc-shaped limiting rod 2 (72) is suitable for sliding through the lower material barrel 2 (622) and the guide barrel 2 (632). The arc-shaped limiting rod 1 (67) and the arc-shaped limiting rod 2 (72) are arranged opposite to each other, and the lower material barrel 1 (621) and the lower material barrel 2 (622) are both connected by guide rails ( A straight limit rod (73) is provided for sliding. The straight limit rod (73) on the lower barrel (621) is suitable for sliding through the lower barrel (621) and the guide barrel (631). The straight limit rod (73) on the lower barrel (622) is suitable for sliding through the lower barrel (622) and the guide barrel (632). A group of connecting rods (74) is provided between the two straight limit rods (73) and the two ends of the rotating rod (71). Each group of connecting rods (74) includes two connecting rods (74) respectively hinged on the straight limit rod (73) and the rotating rod (71). The two connecting rods (74) in the same group are hinged.

5. A welding device for producing plastic cans according to claim 4, characterized in that: The material discharge assembly at the lower end of the material discharge barrel (621) includes a rotating rod (71), a material discharge rod (81) and a material stop rod (84) located below the material discharge rod (81) are slidably provided at the lower end of the material discharge barrel (621), a spring (85) is connected between the material stop rod (84) and the material discharge barrel (621), one end of the material discharge rod (81) located in the material discharge barrel (621) is a wedge-shaped end with an inclined surface facing downward, and a rack (82) is connected to the material discharge rod (81). The lower end of the first material barrel (621) is rotatably provided with a gear (83) meshing with the first rack (82), and the blocking rod (84) is connected to the second rack (86), and the first rack (82) and the second rack (86) are respectively meshed on both sides of the gear (83); the material discharge assembly at the lower end of the second material discharge barrel (622) is the same in structure as the material discharge assembly at the lower end of the first material discharge barrel (621), and the material discharge assembly at the lower end of the second material discharge barrel (622) is suitable for discharging the plastic cover body (2).

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