Double-welding-station switching mechanism, liquid outlet piece welding device and liquid outlet piece welding method

Abstract

The invention discloses a double-welding-station switching mechanism, a liquid outlet piece welding device and a liquid outlet piece welding method.The double-welding-station switching mechanism comprises a rack, a first welding station, a second welding station, a third welding station, a fourth welding station, a fifth welding station and a sixth welding station, and the rack comprises a horizontal panel which is transversely provided with a first through hole; the movable flat plate is arranged above the horizontal panel, a second through hole located over the first through hole is transversely formed in the movable flat plate, and the packaging material is vertically conveyed to penetrate through the first through hole and the second through hole; the two welding devices are transversely installed on the movable flat plate side by side and used for welding the liquid outlet piece to the packaging material; and the transverse movement driving mechanism is arranged on the rack and connected with the movable flat plate so as to drive the movable flat plate to reciprocate in the transverse direction, so that the two welding devices alternately operate on the packaging material. The device has the advantages of being high in positioning precision, rapid in switching, firm in installation and environmentally friendly.

Description

Technical Field

[0001] This invention relates to the field of liquid packaging technology, and in particular to a dual welding station switching mechanism, a liquid outlet welding device, and a welding method thereof. Background Technology

[0002] Liquid foods, such as milk and yogurt, and semi-liquid foods, such as juice, are typically packaged in containers made from paper-based composite packaging materials coated with PE. These containers are formed from continuous rolls of packaging material, which have multiple continuous packaging units that can be fabricated into individual packaging containers. The rolls can be longitudinally sealed to form tubes of packaging material, then sealed and shaped while the contents are being filled, and finally folded at a folding station to achieve the final packaging shape and cut into individual boxes.

[0003] Liquid food packaging containers typically have a liquid outlet, which forms a dispensing port from which the liquid food can flow when opened. During the production process, a capping machine is used to add the liquid outlet, such as a screw cap, to the packaging container.

[0004] In existing technologies, when assembling liquid dispensing components, adhesive bonding is often used to attach components such as screw caps to the finished cardboard box. However, this method suffers from problems such as unreliable bonding, poor positioning accuracy, and poor environmental performance. Moreover, the production line only has one cap installation device, resulting in low assembly efficiency and significantly impacting production capacity. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a dual-welding-station switching mechanism, a liquid outlet welding device, and a liquid outlet welding method. These features high positioning accuracy, rapid welding switching, robust installation, and environmental friendliness. The dual-welding-station switching mechanism and the liquid outlet welding device using it significantly improve production efficiency through the alternating and coordinated operation of two welding stations, without requiring substantial investment in production equipment costs.

[0006] This invention provides a dual welding station switching mechanism, comprising: The frame includes a horizontal panel, on which a first through hole is provided laterally; A movable plate is set above a horizontal panel. A second through hole is horizontally provided on the movable plate, located directly above the first through hole. Packaging materials are vertically conveyed through the first and second through holes. Two welding devices, mounted side-by-side horizontally on a moving plate, are used to weld the liquid outlet components to the packaging material; and A lateral movement drive mechanism is mounted on the frame and connected to the moving plate to drive the moving plate to reciprocate in the lateral direction, so that the two welding devices operate alternately on the packaging material.

[0007] The beneficial effects of this invention are: by driving two welding devices to move through a lateral movement drive mechanism, the switching between two welding stations can be realized. While one welding station is performing welding, the other welding station can be filled with liquid components, thereby enabling continuous operation and high work efficiency; the switching route of the two welding devices is straight and controlled by the same lateral movement drive mechanism, ensuring precise positioning; and the liquid components are assembled by welding instead of the existing adhesive method, resulting in a firm installation and environmentally friendly process.

[0008] As a preferred technical solution, the dual welding station switching mechanism further includes two longitudinal movement drive mechanisms installed on the mobile flat plate. Each welding device is provided with a longitudinal movement drive mechanism at the rear to independently drive each welding device to reciprocate along the longitudinal direction.

[0009] As a preferred technical solution, a horizontal guide rail is provided on the upper surface of the horizontal panel, and a sliding component that cooperates with the horizontal guide rail is provided on the bottom of the moving plate, so that the moving plate can slide along the horizontal guide rail.

[0010] As a preferred technical solution, the frame also includes a fixed upright plate that is horizontally connected to the rear of the horizontal panel and extends upward from the horizontal panel. A horizontal movement drive mechanism is installed on the fixed upright plate, and a movable plate is fixedly installed on the movable upright plate. The movable upright plate is connected to the horizontal movement drive mechanism so that the movable plate can be driven to move horizontally under the drive of the horizontal movement drive mechanism.

[0011] As a preferred technical solution, each welding device on the mobile flat plate is equipped with an anvil in front of it. Each welding device and its corresponding anvil are located on both sides of the second through hole. The welding device moves in the longitudinal direction under the drive of the longitudinal movement drive mechanism at its rear to cooperate with the anvil to weld the liquid outlet and the packaging material together.

[0012] A liquid-discharging component welding device includes any one of the above-mentioned dual welding station switching mechanisms and a liquid-discharging component supply device for supplying liquid-discharging components to each welding device. Compared with the prior art, when welding liquid-discharging components using this liquid-discharging component welding device, the positioning accuracy is high, the environmental friendliness is good, the adhesion is reliable, and the welding station can be quickly switched, resulting in high welding efficiency.

[0013] As a preferred technical solution, a liquid outlet conveying trough is laterally provided on the front side of the fixed base of the welding device. One end of the liquid outlet conveying trough has a feed opening that connects to the liquid outlet supply device, and the upper or lower side of the other end has a pressure plate connected to a vertical elastic device. The pressure plate, under the action of the vertical elastic device, presses the liquid outlet component fed into the liquid outlet conveying trough from the feed opening. The liquid outlet supply device can convey the liquid outlet component into the liquid outlet conveying trough of the welding device through the feed opening, and the liquid outlet component can be pressed by the vertical elastic device acting on the pressure plate. During the welding process, the liquid outlet component is not easily displaced, ensuring accurate positioning.

[0014] As a preferred technical solution, the welding device is provided with several spring pins extending from the front side of the fixed seat to the outside. The spring pins are connected to a longitudinal elastic device located inside the fixed seat, so that after welding is completed, the packaging material with the liquid discharge part welded is pushed apart from the fixed seat under the action of the longitudinal elastic device.

[0015] As a preferred technical solution, when one welding device is performing welding, the other welding device connects with its corresponding liquid outlet supply device to receive the liquid outlet.

[0016] A method for welding a liquid outlet component, using any of the above-mentioned liquid outlet component welding devices to weld the liquid outlet component to packaging material, includes the following steps: Step 1: Convey the packaging material vertically through the first and second through holes continuously; Step 2: Move the first welding device, which contains the liquid dispensing component, to the location of the packaging material using a lateral movement drive mechanism to weld the liquid dispensing component onto the packaging material, and then fill the second welding device with the liquid dispensing component through the liquid dispensing component supply device. Step 3: After welding is completed, the packaging material with the liquid outlet welded on is removed vertically from its current position; Step 4: The second welding device is moved laterally to the location of the packaging material by the lateral movement drive mechanism to weld the liquid outlet to the packaging material, and the liquid outlet is filled into the first welding device by the liquid outlet supply device. Step 5: After welding is completed, the packaging material with the liquid outlet welded is removed vertically from its current position; Step 6: Repeat steps 2-5.

[0017] The above-mentioned liquid dispensing component welding method can quickly and efficiently weld the liquid dispensing component onto the packaging material. When one welding device is working, the other welding device fills the liquid dispensing component, which can achieve continuous operation and save time. Welding the liquid dispensing component directly onto the packaging material used to make liquid packaging boxes solves the problem in the prior art that when the liquid dispensing component of the cap seat of the screw cap device is installed onto the cardboard box by the adhesive method, it can only be installed on one cardboard box at a time and cannot be continuously operated. Moreover, compared with the prior art, the installation is more secure and environmentally friendly. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of a preferred embodiment of the dual welding station switching mechanism of the present invention.

[0019] Figure 2 yes Figure 1 A magnified view of part A.

[0020] Figure 3 yes Figure 1A magnified view of part B.

[0021] Figure 4 This is a three-dimensional structural schematic diagram of a preferred embodiment of the liquid outlet welding device of the present invention.

[0022] Figure 5 yes Figure 4 The front view of the liquid outlet welding device shown.

[0023] Figure 6 yes Figure 5 The diagram shows a cross-sectional view of the liquid outlet welding device along line C-C'.

[0024] Figure 7 yes Figure 6 A magnified view of part D.

[0025] Figure 8 yes Figure 4 A top view of the liquid outlet welding device in one of its motion states.

[0026] Figure 9 yes Figure 4 The diagram shows a state of the welding device for the liquid outlet component.

[0027] Figure 10 yes Figure 9 A magnified view of part E.

[0028] Figure 11 yes Figure 4 The diagram shows a state of the welding device for the liquid outlet component.

[0029] Figure 12 yes Figure 11 A magnified view of part F.

[0030] Figure 13 yes Figure 1 The diagram shows a structural schematic of a welding device in a dual welding station switching mechanism.

[0031] Figure 14 yes Figure 13 Top view of the welding apparatus shown.

[0032] Figure 15 yes Figure 13 Rear view of the welding apparatus shown.

[0033] Figure 16 yes Figure 13 Left view of the welding apparatus shown.

[0034] Figure 17 yes Figure 16 The welding apparatus shown is a cross-sectional view along G-G'.

[0035] Figure 18 yes Figure 17 A magnified view of part H.

[0036] Figure 19 yes Figure 13 The front view of the welding apparatus shown.

[0037] Figure 20 yes Figure 19 The welding apparatus shown is a cross-sectional view along I-I'.

[0038] Figure 21 This is a three-dimensional structural schematic diagram of a preferred embodiment of the liquid outlet welding device of the present invention.

[0039] Figure 22 yes Figure 21 A magnified view of part J.

[0040] Figure 23 This is a schematic diagram of a preferred embodiment of the liquid outlet welding device of the present invention.

[0041] Figure 24 yes Figure 23 The diagram shows a state of the welding device for the liquid outlet component.

[0042] Wherein: horizontal panel-1; first through hole-11; movable vertical plate-12; transverse guide rail-13; fixed vertical plate-14; first corner rib plate-15; second corner rib plate-16; Lateral movement drive mechanism -2; Moving plate-3; Second through hole-31; Horizontal slide groove-32; Slider-33; Longitudinal movement drive mechanism -4; Anvil -5; Welding device - 6; Welding head - 60; Fixing base - 61; Liquid outlet conveying trough - 62; Feed opening - 63; Pressure plate - 64; Springback pin - 65; Second compression spring mounting hole - 66; Second compression spring - 67; Springback pin hole - 68; First compression spring - 69; End cap - 610; Positioning pin through hole - 611; Positioning pin - 612; First compression spring blind hole - 613; Adjusting screw - 614; First screw through hole - 615; Second screw through hole - 616; Pad mounting recess - 617; Pad - 618; Liquid supply device-7; Fixed conveying track-71; Liftable conveying track-72; Material feeding device-73; Packaging materials - 8; Liquid outlet - 81. Detailed Implementation

[0043] The present invention will now be further described with reference to the accompanying drawings and embodiments.

[0044] Example 1. As... Figures 1-3As shown, a dual welding station switching mechanism includes a frame and a welding device 6, a moving plate 3, a transverse movement drive mechanism 2, and a longitudinal movement drive mechanism 4 mounted on the frame.

[0045] Specifically, such as Figure 1 As shown, the frame includes a horizontal panel 1 with a narrow, elongated first through-hole 11 horizontally on it. A movable plate 3 is positioned above the horizontal panel 1, and a narrow, elongated second through-hole 31 horizontally on it. The second through-hole 31 is located directly above the first through-hole 11, meaning the first and second through-holes 11 are vertically aligned. When the packaging material 8 is conveyed vertically, the packaging material can pass through the first and second through-holes 11 and 31. The lateral width of the first and second through-holes 11 is greater than the lateral width of the packaging material 8.

[0046] Two welding devices 6 are mounted side-by-side horizontally on the movable plate 3 for welding the liquid outlet 81 to the packaging material 8. A lateral movement drive mechanism 2 is located at the rear of the horizontal panel 1 and connected to the movable plate 3 to drive the movable plate 3 to reciprocate in the lateral direction, thereby causing the two welding devices 6 mounted on the movable plate 3 to alternately operate on the packaging material 8 passing through the second through-hole 31. The two welding devices 6 can be arranged symmetrically about left and right relative to the center of the second through-hole 31.

[0047] The upper surface of the horizontal panel 1 is provided with a transverse guide rail 13 in front of the first through hole 11. The bottom of the movable plate 3 is provided with a sliding member that can cooperate with the transverse guide rail 13, specifically two sliders 33. The sliders 33 contact the transverse guide rail 13 and can guide the movable plate 3 to slide laterally along the transverse guide rail 13.

[0048] The frame also includes a fixed vertical plate 14 that is laterally connected to the rear of the horizontal panel 1 and extends upward from the horizontal panel 1, i.e., the horizontal panel 1 and the fixed vertical plate 14 are perpendicular to each other and arranged in an L-shape. Figure 1 As shown, first corner ribs 15 are longitudinally arranged between the left and right ends of the horizontal panel 1 and the fixed upright plate 14. A transverse movement drive mechanism 2 is mounted on the fixed upright plate 14. The transverse movement drive mechanism 2 may include a linear motor, which is mounted on the front side of the fixed upright plate 14. A movable plate 3 is fixedly mounted on a movable upright plate 12, which is connected to the power output shaft of the linear motor, thereby driving the movable upright plate 12 and the movable plate 3 to slide laterally along the transverse guide rail 13. Figure 1 As shown, the movable upright plate 12 is arranged perpendicular to the movable flat plate 3 and can be connected to the movable flat plate 3 through the longitudinally arranged second corner rib plate 16 to increase the rigidity of the device.

[0049] The dual welding station switching mechanism also includes a longitudinal movement drive mechanism 4 mounted on the moving plate 3. Each welding device 6 has a longitudinal movement drive mechanism 4 at its rear. Each longitudinal movement drive mechanism 4 can independently drive the welding device 6 in front of it to move longitudinally, so as to contact the packaging material 8 and perform welding operations on the packaging material. In one example, the longitudinal movement drive mechanism 4 can be in the form of a hydraulic cylinder; in another example, it can be in the form of an electric actuator. Of course, it can also be a hydraulic cylinder, an electric screw, or a linear guide pair, or other devices capable of linear reciprocating motion.

[0050] The moving plate 3 is also equipped with an anvil 5 at the front of each welding device 6, and each welding device 6 and its corresponding anvil 5 are located on both sides of the second through hole 31. The welding device 6 can move longitudinally under the drive of the longitudinal movement drive mechanism 4 at its rear to cooperate with the anvil 5 to weld the liquid outlet 81 to the packaging material 8 that is conveyed through the second through hole 31.

[0051] By utilizing the aforementioned dual-welding-station switching mechanism, different welding stations can be switched, allowing two welding devices 6 to alternately perform welding operations on the packaging material 8. Specifically, when the rolled packaging material 8 is continuously conveyed vertically through the first through hole 11 and the second through hole 31, while keeping the packaging material stationary, the moving plate 3 is driven laterally by the lateral movement drive mechanism 2, causing one welding device 6 to move to the location of the packaging material. Then, the welding device 6 is driven longitudinally by the longitudinal movement drive mechanism 4 to cooperate with the corresponding anvil 5 to weld the liquid outlet onto the packaging material. After welding, the welding device 6 is moved away from the packaging material, and the portion of the packaging material with the liquid outlet welded is moved vertically away. Subsequently, the other welding device 6 can be driven to perform welding operations on the packaging material in the same manner using the lateral movement drive mechanism 2 and the longitudinal movement drive mechanism 4.

[0052] Example 2. (As shown) Figures 4-20 As shown, a welding device for liquid outlet components of packaging materials includes the dual welding station switching mechanism described in Example 1 and a liquid outlet component supply device 7 that can independently supply liquid outlet components 81 to each welding device 6.

[0053] like Figure 13As shown, the welding device 6 includes a welding head 60, preferably an ultrasonic welding head. A fixing base 61 is connected to the front of the welding head 60. A liquid outlet conveying channel 62, which does not penetrate the front side of the fixing base 61, is laterally provided on its front side. The liquid outlet conveying channel 62 has a first end that penetrates one side of the fixing base 61 and a closed second end. The first end of the liquid outlet conveying channel 62 is configured as an inlet opening 63 that mates with the liquid outlet supply device 7. The fixing base 61 has a pressure plate 64 connected to one or more vertically elastic devices on the upper or lower side of the second end of the liquid outlet conveying channel 62. In this example, as... Figure 1 As shown, the feed openings 63 of the two welding devices 6 are respectively located at the ends of the welding devices furthest from the other welding device; however, within the scope of this application, the feed openings 63 can be located at either end of the welding device. In this example, as... Figure 13 As shown, the pressure plate 64 is located on the upper side. The pressure plate 64 can press the liquid outlet 81 fed into the liquid outlet conveying trough 62 from the feed opening 63 under the vertical elastic force of the vertical elastic device. In another example, the pressure plate 64 may also be located on the lower side of the liquid outlet conveying trough 62.

[0054] In this example, there are two vertical elastic devices, each including a positioning post 612 and a first compression spring 69, as shown below. Figure 18 As shown. The fixed base 61 has two vertically oriented positioning pin through holes 611 on the upper side of the second end of the liquid outlet conveying channel 62, each positioning pin 612 accommodating a positioning pin 612. An end cap 610 is connected to the top of the fixed base 61. The end cap 610 has a first compression spring blind hole 613, coaxial with the positioning pin through holes 611 and opening downwards, located vertically above each positioning pin through hole 611. A first compression spring 69 is installed in each first compression spring blind hole 613. The lower end of each positioning pin 612 is connected to the pressure plate 64, and the upper end of each positioning pin 612 is connected to the first compression spring 69 directly above it.

[0055] The end cap 610 and the fixed base 61 are connected by an adjusting screw 614. Specifically, the end cap 610 has multiple (e.g., two) first screw through holes 615 vertically, and the fixed base 61 has a second screw through hole 616 coaxially located directly below each of the first screw through holes 615. The adjusting screw 614 is installed in the first screw through holes 615 and the second screw through holes 616 to connect the end cap 610 and the fixed base 61. In this way, by rotating the adjusting screw 614 and controlling the depth to which the adjusting screw 614 enters the second screw through hole 616, the pressure of the pressure plate 64 on the liquid outlet 81 can be adjusted.

[0056] like Figure 19 and 20As shown, the welding device 6 also includes several (e.g., four) spring-loaded pins 65 extending outward through the front side of the fixed base 61. Each spring-loaded pin 65 is connected to a longitudinal elastic device disposed inside the fixed base 61. The longitudinal elastic device includes a second compression spring 67 installed in a second compression spring mounting hole 66 in the fixed base 61. The fixed base 61 has a spring-loaded pin hole 68 coaxially provided at the front end of the second compression spring mounting hole 66. A spring-loaded pin 65 is installed in the spring-loaded pin hole 68, and the rear end of the spring-loaded pin 65 is connected to the second compression spring 67 directly behind it. The rear end of the second compression spring 67 contacts the front end of the welding head 60. During the welding process, the welding device 6 moves longitudinally to bring the liquid outlet 81 filled in the liquid outlet delivery trough 62, the packaging material 8 passing through the second through hole 31, and the anvil 5 into contact. Correspondingly, the spring-loaded pin 65 is pressed into the spring-loaded pin hole 68 and compresses the second compression spring 67, as shown. Figure 9 and 10 As shown; after welding is completed, the fixed seat 61 moves longitudinally in the opposite direction, and the second compression spring 67 applies a longitudinal elastic force to the return pin 65 to push the return pin 65 outward. The return pin 65 then pushes the packaging material 8 with the welded liquid outlet 81 away from the fixed seat 61, and causes the liquid outlet 81 to overcome the clamping force of the pressure plate 64 and separate from the liquid outlet conveying trough 62, as shown. Figure 11 and 12 As shown.

[0057] Figure 17-20 The diagram also shows a pad mounting recess 617 at the second end of the liquid dispensing delivery channel 62, in which a pad 618 is installed to support the liquid dispensing component 81. By replacing the pads 618 with different sizes, liquid dispensing components 81 of different sizes can be accommodated.

[0058] refer to Figure 8 The liquid outlet supply device 7 is connected to the feed opening 63 of the welding device 6 to supply liquid outlet 81 to the liquid outlet conveying tank 62 of the welding device 6. Each liquid outlet supply device 7 includes a fixed conveying track 71, which is disposed on the first side of the corresponding welding device 6 and located at both ends of the elongated first through hole 11. When the moving plate 3 moves laterally to the first end of the first through hole 11, the liquid outlet supply device 7 at the first end aligns with the feed opening 63 of its corresponding welding device 6; similarly, when the moving plate 3 moves laterally to the second end of the first through hole 11, the liquid outlet supply device 7 at the second end aligns with the feed opening 63 of its corresponding welding device 6.

[0059] The liquid outlet supply devices 7 at both ends of the first through hole 11 alternately supply liquid outlet components 81 to their corresponding welding devices 6. Specifically, as shown in... Figure 4 and 5As shown, when the feed opening 63 of the welding device 6 on the right side is connected to its corresponding liquid outlet supply device 7 to fill the liquid outlet 81, the welding device 6 on the left side cooperates with the anvil 5 to perform welding on the packaging material 8. At this time, the welding device 6 on the left side and its corresponding liquid outlet supply device 7 are in a separated state. When the moving plate 3 moves laterally to the left so that the feed opening 63 of the welding device 6 on the left side is connected to the liquid outlet supply device 7 to fill the liquid outlet 81, the welding device 6 on the right side moves accordingly to the position of the packaging material 8 and cooperates with the anvil 5 to perform welding. At this time, the welding device 6 on the right side and its corresponding liquid outlet supply device 7 are in a separated state.

[0060] In this way, the welding station can be switched alternately by the lateral movement drive mechanism 2 and the longitudinal movement drive mechanism 4. The station that is not performing welding can be filled with liquid dispensing components by the liquid dispensing component supply device 7. The two welding devices alternate welding and loading, which can realize continuous operation and save time. In addition, the packaging material remains in place during the welding process, which can ensure the precise positioning of the liquid dispensing component 81. Furthermore, the use of welding instead of adhesive to assemble the liquid dispensing component makes the installation more reliable and environmentally friendly.

[0061] The liquid outlet component 81 can be welded to the packaging material 8 using the above-mentioned liquid outlet component welding device. The welding method includes the following steps: Step 1: The packaging material 8 is continuously conveyed vertically through the first through hole 11 and the second through hole 31.

[0062] Step 2: The first welding device, which contains the liquid outlet 81, is moved to the location of the packaging material 8 via the lateral movement drive mechanism 2 to weld the liquid outlet 81 onto the packaging material 8. The liquid outlet supply device 7 then supplies the second welding device with the liquid outlet 81. When the first welding device reaches the location of the packaging material 8, it can be further driven longitudinally toward the packaging material 8 by the longitudinal movement drive mechanism 4 connected to it. This allows the first welding device to cooperate with the corresponding anvil 5 to bring the liquid outlet 81 into contact with the packaging material 8 and weld the liquid outlet 81 onto the packaging material 8.

[0063] Step 3: After welding is completed, the packaging material with the liquid outlet 81 welded on is moved vertically away from its current position. At this time, the first welding device moves away from the packaging material 8 in the opposite longitudinal direction.

[0064] Step 4: The second welding device is moved laterally to the location of the packaging material 8 by the lateral movement drive mechanism 2 to weld the liquid outlet 81 onto the packaging material, and the liquid outlet 81 is supplied to the first welding device by the liquid outlet supply device 7. When the second welding device reaches the location of the packaging material 8, the second welding device can be further driven longitudinally toward the packaging material 8 by the longitudinal movement drive mechanism 4 connected to the second welding device, and cooperate with the corresponding anvil 5 to make the liquid outlet 81 contact the packaging material 8 and weld the liquid outlet 81 onto the new packaging material part.

[0065] Step 5: After welding is completed, the packaging material with the welded liquid outlet 81 is moved vertically away from its current position. At this time, the second welding device moves away from the packaging material 8 in the opposite longitudinal direction.

[0066] Step 6: Repeat steps 2-5.

[0067] In this example, the packaging material 8 is a rolled strip of paper packaging material. In one example, the liquid dispensing component 81 is a perforated plastic cap or a perforated plastic sheet.

[0068] Example 3. (As shown) Figures 21-22 As shown, the difference between this embodiment and embodiment 2 is that: a material feeding device 73 is provided on the fixed conveying track 71; a horizontal groove 32 with an opening facing downward is provided on the bottom of the moving plate 3, and the horizontal guide rail 13 is embedded in the horizontal groove 32 so that the moving plate 3 can slide along the horizontal guide rail 13.

[0069] Example 4. (As shown) Figures 23-24 As shown, the difference between this embodiment and Embodiment 2 is that the feed openings of the two welding devices 6 are located at the same end, such as the right end; the liquid outlet supply device 7 includes a liftable conveyor track 72, and the two liftable conveyor tracks 72 are arranged above the welding devices 6. Specifically, the liftable conveyor track 72 can be vertically lifted and lowered. When liquid outlet needs to be supplied, it moves downward to connect with the feed opening of its corresponding welding device. After the supply is completed, it moves upward to disengage from the feed opening, thus not hindering the horizontal movement of the welding devices 6.

[0070] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A dual welding station switching mechanism, characterized in that, include: The frame includes a horizontal panel (1) with a first through hole (11) provided laterally on the horizontal panel (1). The mobile plate (3) is set above the horizontal panel (1). The mobile plate (3) has a second through hole (31) located directly above the first through hole (11) in the horizontal direction. The packaging material (8) is vertically conveyed through the first through hole (11) and the second through hole (31). Two welding devices (6), mounted side-by-side laterally on a moving plate (3), are used to weld the liquid outlet to the packaging material; and A lateral movement drive mechanism (2) is mounted on the frame and connected to a moving plate (3) to drive the moving plate (3) to move back and forth in the lateral direction, so that the two welding devices (6) operate alternately on the packaging material.

2. The dual welding station switching mechanism as described in claim 1, characterized in that: The dual welding station switching mechanism also includes two longitudinal movement drive mechanisms (4) installed on the mobile flat plate (3). Each welding device (6) is provided with a longitudinal movement drive mechanism (4) at the rear to independently drive each welding device (6) to move back and forth in the longitudinal direction.

3. The dual welding station switching mechanism as described in claim 1, characterized in that: A horizontal guide rail (13) is provided on the upper surface of the horizontal panel (1), and a sliding member that cooperates with the horizontal guide rail (13) is provided on the bottom of the moving plate (3) so that the moving plate (3) slides along the horizontal guide rail (13).

4. The dual welding station switching mechanism as described in claim 1, characterized in that: The frame also includes a fixed upright plate (14) that is laterally connected to the rear of the horizontal panel (1) and extends upward from the horizontal panel (1). A lateral movement drive mechanism (2) is mounted on the fixed upright plate (14). A movable plate (3) is fixedly mounted on the movable upright plate (12). The movable upright plate (12) is connected to the lateral movement drive mechanism (2) so that the movable plate (3) can be moved laterally under the drive of the lateral movement drive mechanism (2).

5. The dual welding station switching mechanism as described in claim 2, characterized in that: An anvil (5) is installed in front of each welding device (6) on the mobile plate (3). Each welding device (6) and its corresponding anvil (5) are located on both sides of the second through hole (31). The welding device (6) moves in the longitudinal direction under the drive of the longitudinal movement drive mechanism (4) at its rear to cooperate with the anvil (5) to weld the liquid outlet (81) and the packaging material together.

6. A welding device for liquid outlet components, characterized in that: Includes a dual welding station switching mechanism as described in any one of claims 1-5 and a liquid outlet supply device (7) that supplies liquid outlets (81) to each welding device (6).

7. The welding device for liquid outlet components as described in claim 6, characterized in that: The welding device (6) has a horizontal liquid outlet conveying trough (62) on its fixed base (61). One end of the liquid outlet conveying trough (62) is provided with a feed opening (63) that connects to the liquid outlet supply device (7), and the other end is provided with a pressure plate (64) connected to the vertical elastic device. The pressure plate (64) presses the liquid outlet (81) fed from the feed opening (63) into the liquid outlet conveying trough (62) under the action of the vertical elastic device.

8. The welding device for liquid outlet components as described in claim 7, characterized in that: The welding device (6) is provided with a number of spring pins (65) extending to the outside through the front side of the fixed seat (61). The spring pins (65) are connected to a longitudinal elastic device provided inside the fixed seat (61) so that after welding, the packaging material with the liquid outlet (81) is pushed apart from the fixed seat (61) under the action of the longitudinal elastic device.

9. The welding device for liquid outlet components as described in claim 6, characterized in that: When one of the welding devices (6) performs welding, the other welding device (6) docks with its corresponding liquid outlet supply device (7) to receive the liquid outlet (81).

10. A method for welding a liquid outlet component, comprising welding the liquid outlet component to packaging material using the liquid outlet component welding apparatus as described in any one of claims 6-9, comprising the following steps: Step 1: The packaging material (8) is continuously conveyed vertically through the first through hole (11) and the second through hole (31); Step 2: Move the first welding device (6) containing the liquid outlet (81) to the location of the packaging material (8) via the lateral movement drive mechanism (2) to weld the liquid outlet (81) onto the packaging material (8), and fill the second welding device with the liquid outlet (81) via the liquid outlet supply device (7). Step 3: After welding is completed, the packaging material with the liquid outlet (81) welded on is removed vertically from its current position; Step 4: The second welding device is moved laterally to the location of the packaging material (8) by the lateral movement drive mechanism (2) to weld the liquid outlet (81) onto the packaging material, and the liquid outlet (81) is filled into the first welding device by the liquid outlet supply device (7). Step 5: After welding is completed, the packaging material with the liquid outlet (81) welded on is removed vertically from its current position; Step 6: Repeat steps 2-5.

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