Ultrasonic welding equipment and method for instantly-prepared bottle cap sealing film

Abstract

The invention relates to the technical field of packaging sealing machining, and discloses ultrasonic welding equipment and method for an instantly-prepared bottle cap sealing film, the welding equipment comprises an operation table and a welding machine body fixedly installed on the top, a positioning mechanism is arranged on the upper surface of the operation table, and the positioning mechanism is arranged below a welding head of the welding machine body; according to the bottle cap welding device, the lead screw transmission assembly is matched with the positioning block, the position of the positioning block can be accurately adjusted in the horizontal direction, meanwhile, the electric rotating table is arranged at the bottom of the separation frame to drive the bearing mechanism to rotate, the size limitation of a fixed welding head is effectively made up, and the welding efficiency is improved. Full-coverage welding of the small-size bottle caps can be achieved, the edges of the large-size bottle caps can make contact with the welding heads in sequence all around, welding uniformity is ensured, the adaptability of equipment to the bottle caps of different specifications is greatly improved, and the equipment remodeling cost is reduced.

Description

Technical Field

[0001] This invention belongs to the field of packaging and sealing processing technology, specifically relating to an ultrasonic welding device and method for producing bottle cap sealing films. Background Technology

[0002] In the packaging and processing of food, pharmaceutical and cosmetic industries, the welding of the sealing film for bottle caps is a key process to ensure product freshness and prevent leakage. Ultrasonic welding is widely used in this process because it has advantages such as high welding efficiency, good sealing performance and no consumable pollution.

[0003] Existing ultrasonic welding equipment has significant compatibility defects: on the one hand, the size of the welding head is usually a fixed specification. If the area of ​​the bottle cap is larger than the area of ​​the welding head, direct welding will result in problems such as local areas not being able to make contact and the sealing film not being welded in place, leading to sealing failure and failing to meet the processing requirements of bottle caps of different sizes.

[0004] On the other hand, the rigid molds used in existing equipment do not provide sufficient positioning accuracy for bottle caps. Bottle caps smaller than the mold cannot be fixed after being placed in the groove, and bottle caps are prone to shifting during the welding process, which further aggravates the problems of incomplete welding and missing welding. Moreover, the clamping mechanisms are mostly of fixed specifications, and special clamps need to be replaced when changing bottle caps of different sizes. The operation is cumbersome and the equipment investment cost is high, making it difficult to adapt to the production needs of multiple varieties and small batches. Summary of the Invention

[0005] This invention provides an ultrasonic welding device and method for readily available bottle cap sealing films, solving the technical problems in related technologies such as the inability of fixed-size welding heads to adapt to bottle caps of different specifications, localized incomplete welding of large-size bottle caps, and low positioning accuracy of bottle caps.

[0006] The present invention provides an ultrasonic welding device for ready-to-use bottle cap sealing film, including an operating table and a welding machine body fixedly installed on the top. A positioning mechanism is provided on the upper surface of the operating table. The positioning mechanism is located below the welding head of the welding machine body. A bearing mechanism is rotatably provided inside the positioning mechanism for supporting the bottle cap.

[0007] The positioning mechanism includes a support plate, a separator, and a screw drive assembly rotatably mounted on top of the separator. The separator is located on the lower surface of the support plate. The screw drive assembly is threadedly connected to the bottom of the bearing mechanism. An electric rotary table is fixedly connected to the bottom of the separator. During welding, the horizontal position of the bearing mechanism is adjusted by rotating the screw drive assembly. Then, the rotating end of the electric rotary table drives the separator to rotate, causing the bearing mechanism and the bottle cap on top to make circular motion, so that all parts of the bottle cap surface come into contact with the welding head of the welding machine body.

[0008] In a preferred embodiment, the bearing mechanism includes a positioning block with a T-shaped cross-section. The bottom of the positioning block extends through the support plate to the bottom of the support plate. The bottom of the positioning block is fixedly connected to the slider of the lead screw drive assembly. A through hole is provided inside the support plate, and the positioning block is located inside the through hole.

[0009] In a preferred embodiment, a guide rail is fixedly installed on the top of the operating table, and a support plate is slidably installed on the upper surface of the guide rail via a slider. An electric cylinder is fixedly installed on the upper surface of the operating table, and one end of the piston rod of the electric cylinder is fixedly connected to the support plate. The extension and retraction of the piston rod of the electric cylinder will push the bearing mechanism to move along the direction of the guide rail, thereby further adjusting the position of the bottle cap.

[0010] In a preferred embodiment, the operating table has a slotted hole inside, the electric rotary table is located inside the slotted hole, a guide frame is fixedly installed on the lower surface of the operating table, and the bottom housing of the electric rotary table is slidably connected to the guide frame.

[0011] In a preferred embodiment, a worm gear ring is rotatably mounted on the outer wall of the positioning block, the worm gear ring is located between the support plate and the worm gear ring, an extension block is provided at the edge of the positioning block, and a worm is rotatably mounted inside the extension block, the worm meshing with the worm gear ring.

[0012] In a preferred embodiment, a rectangular slot is provided on the side of the extension block near the worm gear ring. The shape of the rectangular slot is adapted to the worm gear ring. A clamping rod is slidably installed inside the worm gear ring. The clamping rod is evenly distributed at the four division points of the worm gear ring. An inclined groove is provided at the junction of the worm gear ring and the clamping rod. Guide holes are provided at equal intervals along the radial direction at the edge of the positioning block. The rod body of the clamping rod is slidably disposed inside the guide hole.

[0013] In a preferred embodiment, a support plate overlaps the top of the positioning block, a cavity is provided inside the positioning block, a discharge mechanism is provided inside the cavity, and a pressure block is rotatably installed on the top of the extension block, with the end of the pressure block overlapping the upper surface of the support plate.

[0014] In a preferred embodiment, the discharge mechanism includes a base plate whose shape is adapted to the cavity and which is slidably disposed inside the cavity. A second spring is connected between the lower surface of the base plate and the bottom of the cavity.

[0015] In a preferred embodiment, a first connecting frame is fixedly installed on the upper surface of the base plate, a first connecting rod is rotatably connected to the end of the first connecting frame, and the end of the first connecting rod is provided with a bent portion. A second connecting frame is rotatably connected to the lower surface of the bearing plate, one end of the first connecting rod is rotatably connected to the middle section of the second connecting frame, a second connecting rod is rotatably connected to the end of the second connecting frame, one end of the second connecting rod is rotatably connected to the middle section of the first connecting frame, and protrusions are provided on the side of the second connecting frame and the side of the first connecting frame. A first spring is fixedly connected between the two protrusions.

[0016] An ultrasonic welding method for readily available bottle cap sealing films includes the following steps:

[0017] S1. Bottle cap placement: Place the bottle cap with the sealing film to be welded on the carrier plate and push the carrier plate to rotate to a horizontal position. Then continue to press down on the carrier plate so that the inner wall of the bottle cap initially fits the top of the positioning block.

[0018] S2. Double fixing: Rotate the top pressure block of the extension block so that the end of the pressure block overlaps the bearing plate to fix the bearing plate. Rotate the worm gear inside the extension block to drive the worm wheel to rotate, so that the four equally spaced clamping rods move radially and tightly abut against the bottle cap to achieve centering and clamping of the bottle cap.

[0019] S3. Positioning Adjustment: For large bottle caps with an area larger than the welding head, the electric cylinder is activated to push the support plate to move along the guide rail, which in turn moves the bearing mechanism and the bottle cap closer to or away from the welding head. The electric rotary table moves synchronously with the support plate, and the screw drive assembly is rotated to drive the positioning block to slide horizontally and finely adjust the position of the bottle cap. Small bottle caps do not require fine-tuning.

[0020] S4. Ultrasonic welding: Start the main body of the welding machine, adjust the ultrasonic power and welding time parameters, control the welding head to press down, and the bottle cap to contact the sealing film at its bottom. The sealing film and the bottle cap contact part will generate heat through friction and melt and fuse under pressure. At the same time, start the electric rotary table to drive the bearing mechanism and the bottle cap to rotate, so that the edge of the bottle cap will contact the welding head in sequence to complete uniform welding. After the vibration stops, it will cool and solidify.

[0021] S5. Automatic feeding: The worm gear is rotated in the opposite direction to move the clamping rod radially along the guide hole, releasing the bottle cap. Then the pressure block is rotated to release the end of the pressure block from the bearing plate and release the axial clamping. Finally, the feeding mechanism automatically pops out the bottle cap.

[0022] The beneficial effects of this invention are:

[0023] 1. This invention, through the cooperation of a lead screw drive assembly and a positioning block, can precisely adjust the position of the positioning block in the horizontal direction. At the same time, an electric rotary table is set at the bottom of the separator to drive the bearing mechanism to rotate, which effectively makes up for the size limitations of the fixed welding head. It can not only achieve full coverage welding of small bottle caps, but also allow the edges of large bottle caps to contact the welding head in sequence around the entire circumference, ensuring welding uniformity, greatly improving the equipment's adaptability to bottle caps of different specifications, and reducing equipment changeover costs.

[0024] 2. This invention uses a worm gear to drive a worm wheel to rotate, so that the four clamping rods move radially at the same time to clamp and fix the bottle cap. This can avoid the bottle cap shifting due to high-frequency vibration during the welding process and ensure welding accuracy. At the same time, a feeding mechanism powered by a spring is set up to realize automatic feeding after welding, which can avoid damage to the bottle cap caused by manual feeding. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0026] Figure 1 This is a schematic diagram of the overall assembly of the present invention.

[0027] Figure 2 This is a side view of the present invention.

[0028] Figure 3 This is a schematic diagram of the structural assembly of the bearing mechanism, operating table and positioning mechanism of the present invention.

[0029] Figure 4 This is a schematic diagram showing the disassembled structure of the support plate and positioning block of the present invention.

[0030] Figure 5 This is the present invention. Figure 4 Enlarged structural diagram of part A.

[0031] Figure 6 This is a schematic diagram showing the disassembled structure of the worm gear ring, positioning block, and bearing plate of the present invention.

[0032] Figure 7 This is a schematic diagram of the planar structure of the positioning block of the present invention.

[0033] Figure 8 This is a side view of the discharge mechanism of the present invention.

[0034] Figure 9 This is a schematic diagram of the assembly of the bearing plate, the first connecting frame, and the second connecting frame of the present invention.

[0035] Figure 10 This is the present invention. Figure 9 Enlarged structural diagram of section B.

[0036] Figure 11 This is a schematic diagram of the operation process of the present invention.

[0037] In the diagram: 1. Operating table; 2. Welding machine body; 3. Positioning mechanism; 31. Guide rail; 32. Support plate; 33. Electric cylinder; 34. Electric rotary table; 35. Strip hole; 36. Guide frame; 37. Divider frame; 38. Screw drive assembly; 39. Through hole; 4. Bearing mechanism; 41. Worm gear ring; 42. Positioning block; 43. Bearing plate; 44. Clamping rod; 45. Inclined groove; 46. Guide hole; 47. Extension block; 48. Cavity; 49. Pressure block; 410. Worm; 411. Rectangular slot; 5. Discharge mechanism; 51. Base plate; 52. First connecting frame; 53. Second connecting frame; 54. First spring; 55. First connecting rod; 56. Second connecting rod; 57. Second spring; 58. Protrusion; 59. Bending part. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0039] Example 1

[0040] like Figure 1 , Figure 2 As shown, an ultrasonic welding device for sealing bottle caps includes an operating table 1 and a welding machine body 2 fixedly installed on the top. A positioning mechanism 3 is provided on the upper surface of the operating table 1. The positioning mechanism 3 is located below the welding head of the welding machine body 2. A bearing mechanism 4 is rotatably provided inside the positioning mechanism 3. The bearing mechanism 4 is used to support the bottle cap.

[0041] The positioning mechanism 3 includes a support plate 32, a separator 37, and a screw drive assembly 38 rotatably mounted on the top of the separator 37. The separator 37 is located on the lower surface of the support plate 32. The screw drive assembly 38 is threadedly connected to the bottom of the bearing mechanism 4. An electric rotary table 34 is fixedly connected to the bottom of the separator 37. During welding, the horizontal position of the bearing mechanism 4 is adjusted by rotating the screw drive assembly 38. Then, the rotating end of the electric rotary table 34 drives the separator 37 to rotate, causing the bearing mechanism 4 and the bottle cap on its top to make circular motion, so that all parts of the bottle cap surface are in contact with the welding head of the welding machine body 2.

[0042] It should be noted that the electric rotary table 34 is driven by a stepper motor to ensure consistent contact between the bottle cap and the welding head during the rotation process. The clamping rod 44 has a silicone anti-slip pad attached to its body, which can enhance the clamping stability of the bottle cap and avoid scratches and damage to the surface of the bottle cap during the clamping process.

[0043] In this embodiment, the specific implementation scenario is as follows: the bottle cap to be welded is placed on the upper surface of the support mechanism 4, so that the center of the bottle cap is roughly aligned with the axis of the positioning block 42. Then, the welding machine body 2 is started, the ultrasonic welding parameters are adjusted, and the welding head is pressed down. The bottle cap contacts the sealing film at its bottom. The contact area between the sealing film and the bottle cap generates intense friction under high-frequency vibration, instantly forming a local high temperature, which melts the plastic or composite film substrate of the contact surface. At the same time, under the pressure, they fuse into one. After the vibration stops, it cools and solidifies rapidly, completing the sealing welding.

[0044] For small bottle caps, the positioning block 42 can be adjusted so that the welding head can completely cover the welding area. If the bottle cap area is larger than the welding head area, the lead screw in the lead screw drive assembly 38 is rotated, and the horizontal position of the positioning block 42 is adjusted by the cooperation of the lead screw and the slider so that other parts of the bottle cap surface can contact the welding head.

[0045] Even if the position of a large bottle cap is adjusted by a lead screw, if the welding head is pressed down once, the uneven force may still result in inconsistent edge welding strength. During subsequent welding, the electric rotary table 34 is started to drive the separator 37, the bearing mechanism 4 and the bottle cap to rotate synchronously, so that the edge of the bottle cap contacts the welding head in sequence, completing the circumferential welding of the sealing film.

[0046] Further explanation is needed, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a guide rail 31 is fixedly installed on the top of the operating table 1, and a support plate 32 is slidably installed on the upper surface of the guide rail 31 via a slider. An electric cylinder 33 is fixedly installed on the upper surface of the operating table 1. One end of the piston rod of the electric cylinder 33 is fixedly connected to the support plate 32. The extension and retraction of the piston rod of the electric cylinder 33 will push the bearing mechanism 4 to move along the direction of the guide rail 31 to further adjust the position of the bottle cap. A strip hole 35 is opened inside the operating table 1, and an electric rotary table 34 is located inside the strip hole 35. A guide frame 36 is fixedly installed on the lower surface of the operating table 1, and the bottom shell of the electric rotary table 34 is slidably connected to the guide frame 36.

[0047] When the bottle cap is larger than the welding head, the electric cylinder 33 can push the support plate 32 to move quickly along the guide rail 31, so that the bottle cap moves closer to or further away from the welding head, achieving preliminary position adjustment and greatly shortening the time for manual adjustment. During the movement of the support plate 32, the electric rotary table 34 moves along the strip hole 35, and a guide frame 36 is provided on the lower surface of the operating table 1 to provide stable support for the electric rotary table 34, ensuring that the electric rotary table 34 can move synchronously with the support plate 32, and ensuring that the two actions of "translation adjustment" and "rotation welding" do not interfere with each other.

[0048] Among them, the welding machine body 2, electric cylinder 33, and electric rotary table 34 are all existing technologies, and their components and operating principles are publicly available technologies, so they will not be explained in detail here.

[0049] Example 2

[0050] Reference Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the bearing mechanism 4 includes a positioning block 42 with a T-shaped cross-section. The bottom of the positioning block 42 extends through the support plate 32 to the bottom of the support plate 32. The bottom of the positioning block 42 is fixedly connected to the slider of the lead screw transmission assembly 38. The support plate 32 has a through hole 39 inside, and the positioning block 42 is located inside the through hole 39. A worm gear ring 41 is rotatably mounted on the outer wall of the positioning block 42. The worm gear ring 41 is located between the support plate 32 and the worm gear ring 41. An extension block 47 is provided at the edge of the positioning block 42. A worm 410 is rotatably mounted inside the extension block 47, and the worm 410 meshes with the worm gear ring 41.

[0051] A rectangular slot 411 is provided on the side of the extension block 47 near the worm gear ring 41. The shape of the rectangular slot 411 is adapted to the worm gear ring 41. A clamping rod 44 is slidably installed inside the worm gear ring 41. The clamping rod 44 is evenly distributed at the four division points of the worm gear ring 41. An inclined groove 45 is provided at the junction of the worm gear ring 41 and the clamping rod 44. Guide holes 46 are provided at equal intervals along the radial direction at the edge of the positioning block 42. The rod body of the clamping rod 44 is slidably disposed inside the guide hole 46. A bearing plate 43 overlaps the top of the positioning block 42. A cavity 48 is provided inside the positioning block 42. A discharge mechanism 5 is provided inside the cavity 48. A pressure block 49 is rotatably installed on the top of the extension block 47. The end of the pressure block 49 overlaps the upper surface of the bearing plate 43.

[0052] It should be noted that the T-shaped cross-section positioning block 42 can overlap the upper surface of the support plate 32, and its bottom can also be connected to the slider in the screw drive assembly 38. While ensuring stability during the welding process, it can also be freely adjusted in position. At the same time, the through hole 39 opened in the support plate 32 provides sufficient space for the positioning block 42 to move in the horizontal direction and has sufficient space for rotation in the subsequent process. The positioning block 42 has a cavity 48 inside to accommodate the discharge mechanism 5.

[0053] In this embodiment, the specific implementation scenario is as follows: During use, the support plate 43 is used to support the bottle cap. By rotating the pressure block 49, its end overlaps the upper surface of the support plate 43 to press the support plate 43 firmly, preventing the bottle cap from shifting due to high-frequency vibration during welding. Subsequently, the worm 410 inside the extension block 47 is rotated. The worm 410 meshes with the worm wheel ring 41, driving the worm wheel ring 41 to rotate on the outer wall of the positioning block 42. During its rotation, the end of the clamping rod 44 is pushed by the groove wall on one side of the inclined groove 45, and then... The guide hole 46 at the edge of the positioning block 42 forces the clamping rod 44 to move along the guide hole 46 until the ends of the four equally spaced clamping rods 44 are in close contact with the bottle cap. The four-point positioning principle is used to realize the automatic centering and clamping of the bottle cap. The worm gear 410 is rotated in the opposite direction, and the worm wheel ring 41 rotates in the opposite direction. The other side wall of the inclined groove 45 applies a reverse thrust to the clamping rod 44. The clamping rod 44 moves along the guide hole 46 to the edge of the positioning block 42, releasing the clamping of the bottle cap. Finally, the discharge mechanism 5 can pop out the carrier plate 43 to complete the automatic discharge.

[0054] Example 3

[0055] like Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, the discharge mechanism 5 includes a base plate 51, the shape of which is adapted to the cavity 48, and the base plate 51 is slidably disposed inside the cavity 48. A second spring 57 is connected between the lower surface of the base plate 51 and the bottom of the cavity 48. A first connecting frame 52 is fixedly installed on the upper surface of the base plate 51. A first connecting rod 55 is rotatably connected to the end of the first connecting frame 52, and a bent portion 59 is provided at the end of the first connecting rod 55. A second connecting frame 53 is rotatably connected to the lower surface of the bearing plate 43. One end of the first connecting rod 55 is rotatably connected to the middle section of the second connecting frame 53. A second connecting rod 56 is rotatably connected to the end of the second connecting frame 53. One end of the second connecting rod 56 is rotatably connected to the middle section of the first connecting frame 52. Both the side of the second connecting frame 53 and the side of the first connecting frame 52 are provided with protrusions 58, and a first spring 54 is fixedly connected between the two protrusions 58.

[0056] It should be noted that the second connecting frame 53 is rotatably connected to the first connecting frame 52 via the first connecting rod 55 and the second connecting rod 56. In the loosened state, the supporting force of the first spring 54 will hold the second connecting frame 53 in place. The first connecting rod 55 and the second connecting rod 56 are used to determine the rotation path of the second connecting frame 53. Since the end of the first connecting rod 55 is provided with a bent part 59, the connection point between the first connecting rod 55 and the second connecting frame 53 is close to the end of the second connecting frame 53. As a result, the second connecting frame 53 rotates in a flipping state. When the spring force of the first spring 54 is released, it will hold the second connecting frame 53 in a vertical state. The end of the first connecting rod 55 and the end of the second connecting rod 56 determine the angle of the second connecting frame 53. At this time, the material will slide off the bearing plate 43.

[0057] In this embodiment, the base plate 51 is installed in the cavity 48 by the second spring 57. When placing the bottle cap, it is first attached to the vertical support plate 43, and then the support plate 43 is pushed to rotate to a horizontal state. During this process, the support plate 43 will compress the first spring 54 through the second connecting frame 53. After the support plate 43 rotates to a horizontal state, the support plate 43 is pressed down. The pressure is transmitted to the base plate 51 through the first connecting frame 52 and compresses the second spring 57, so that the base plate 51 enters the depth of the cavity 48. Finally, the support plate 43 will be attached to the surface of the positioning block 42. The edge of the support plate 43 is also provided with a guide hole 46 to accommodate the clamping rod 44. Finally, the pressure block 49 is rotated to press the support plate 43.

[0058] After welding is completed, the worm gear 410 is rotated in the opposite direction to make the clamping rod 44 move radially along the guide hole 46, releasing the radial clamping of the bottle cap. At the same time, the end of the pressure block 49 is rotated away from the support plate 43 and contacts the pressure on the support plate 43. Under the rebound of the second spring 57, the bottom plate 51 moves upward and simultaneously drives the support plate 43 to disengage from the clamping rod 44.

[0059] During the ascent of the first connecting frame 52, the second connecting frame 53 cannot be flipped due to the restriction of the clamping rod 44. At this time, the first connecting rod 55 and the second connecting rod 56 remain stationary. After the bearing plate 43 disengages from the clamping rod 44, the rebound of the first spring 54 will push the second connecting frame 53 to rotate to a vertical state, so that the bottle cap automatically disengages from the bearing mechanism 4 and completes the automatic unloading.

[0060] like Figure 11 As shown, the working principle of this invention is as follows:

[0061] In the initial state, the discharge mechanism 5 is in the released state. At this time, the bottle cap is attached to the surface of the support plate 43 and pushed to rotate to the horizontal state. During this process, the second connecting frame 53 compresses the first spring 54 and continues to press down the support plate 43 so that the pressure is transmitted to the bottom plate 51. The second spring 57 is compressed until the bottom plate 51 enters the depth of the cavity 48. Finally, the support plate 43 is attached to the upper surface of the positioning block 42. Then, the pressure block 49 is rotated to fix the support plate 43.

[0062] The worm 410 inside the rotating extension block 47 meshes with the worm wheel ring 41, causing the worm wheel ring 41 to rotate on the outer wall of the positioning block 42. This rotation pushes the clamping rods 44 through the inner wall of one side of the inclined groove 45. Combined with the constraint of the guide hole 46 on the edge of the positioning block 42, the four equally spaced clamping rods 44 are forced to move along the guide hole 46 toward the axis of the positioning block 42 until they are tightly abutted against the bottle cap, thus achieving automatic centering and clamping of the bottle cap.

[0063] If the size of the welding head matches the size of the bottle cap, the welding machine body 2 is started directly for welding. If the size of the bottle cap is too large and cannot be accurately aligned with the welding head, the electric cylinder 33 on the top of the operating table 1 is started. The piston rod of the electric cylinder 33 extends and retracts to push the support plate 32 to move along the guide rail 31, which drives the bearing mechanism 4 and the bottle cap as a whole to move closer to or away from the welding head of the welding machine body 2, so that the welding part moves below the welding head and achieves large stroke coarse adjustment.

[0064] After moving to the approximate area, rotate the lead screw in the lead screw drive assembly 38 at the top of the separator 37. Use the cooperation between the lead screw and the slider to drive the positioning block 42 to slide horizontally, finely adjust the horizontal position of the bottle cap, and ensure that the welding area of ​​the bottle cap can contact the welding head. The through hole 39 provides the positioning block 42 with room to move.

[0065] Finally, the main body 2 of the welding machine is started. After adjusting parameters such as ultrasonic power and welding time, the welding head is pressed down, and the bottle cap contacts the sealing film at its bottom. The ultrasonic generator converts the power frequency electrical energy into a high frequency electrical signal, which is then converted into high frequency mechanical vibration by the transducer and transmitted to the welding head through the amplitude transformer. The welding head generates intense friction with the sealing film and the bottle cap, instantly forming a local high temperature, which melts the plastic or composite film substrate on the contact surface and fuses it into one piece under the pressure of the welding head. At the same time, the electric rotary table 34 is started, which drives the separator 37, the bearing mechanism 4 and the bottle cap to rotate synchronously, so that the edge of the bottle cap contacts the welding head in sequence, ensuring that the circumferential sealing film is evenly fused. After the vibration stops, the fused part cools and solidifies rapidly, completing the sealing welding.

[0066] After welding is completed, the worm gear 410 is rotated in the opposite direction, which drives the worm wheel ring 41 to rotate in the opposite direction. The other side wall of the inclined groove 45 applies a reverse thrust to the clamping rod 44, causing the clamping rod 44 to move radially along the guide hole 46, releasing the radial clamping of the bottle cap. At the same time, the pressure block 49 is rotated, causing its end to disengage from the bearing plate 43, releasing the axial clamping.

[0067] Under the action of the second spring 57, the base plate 51 moves upward first, causing the bearing plate 43 to disengage from the clamping rod 44. Then, the first spring 54 pushes the second connecting frame 53. Under the restriction of the first connecting rod 55 and the second connecting rod 56, the second connecting frame 53 rotates to a vertical state, causing the bottle cap to slide off to complete the unloading and wait for the next operation cycle.

[0068] 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. An ultrasonic welding apparatus for sealing membranes of on-the-go bottle caps, comprising an operating table (1) and a fixedly mounted top welding machine body (2), characterized in that, The operation platform (1) upper surface is provided with a positioning mechanism (3), the positioning mechanism (3) is arranged below the welding head of the welding machine main body (2), a bearing mechanism (4) is rotatably arranged in the positioning mechanism (3), and the bearing mechanism (4) is used for bearing the bottle cap; The positioning mechanism (3) comprises a support plate (32), a partition frame (37) and a screw rod transmission assembly (38) rotatably installed on the top of the partition frame (37), the partition frame (37) is arranged on the lower surface of the support plate (32), the screw rod transmission assembly (38) is threadedly connected with the bottom of the bearing mechanism (4), the bottom of the partition frame (37) is fixedly connected with an electric rotary table (34), when welding, the horizontal position of the bearing mechanism (4) is adjusted by rotating the screw rod transmission assembly (38), then the rotary end of the electric rotary table (34) drives the partition frame (37) to rotate, so that the bearing mechanism (4) and the bottle cap on the top thereof make circular motion, and each part on the surface of the bottle cap is in contact with the welding head of the welding machine main body (2).

2. The apparatus for ultrasonic welding of a ready-to-use bottle cap sealing film according to claim 1, wherein The bearing mechanism (4) comprises a positioning block (42), the cross section of the positioning block (42) is T-shaped, the bottom of the positioning block (42) extends through the support plate (32) to the lower side of the support plate (32), and the bottom of the positioning block (42) is fixedly connected with the sliding block of the screw rod transmission assembly (38). The support plate (32) is internally provided with a through hole (39), and the positioning block (42) is located on the inner side of the through hole (39).

3. The apparatus for ultrasonic welding of a ready-to-use bottle cap sealing film according to claim 1, wherein The top of the operation platform (1) is fixedly provided with a guide rail (31), the support plate (32) is slidably arranged on the upper surface of the guide rail (31), the upper surface of the operation platform (1) is fixedly provided with an electric cylinder (33), one end of the piston rod of the electric cylinder (33) is fixedly connected with the support plate (32), and the extension and retraction of the piston rod of the electric cylinder (33) can drive the bearing mechanism (4) to move along the direction of the guide rail (31), so that the position of the bottle cap is further adjusted.

4. An apparatus for ultrasonic welding of a ready-to-fill bottle cap sealing film according to claim 3, characterized in that, The operation platform (1) is internally provided with a strip-shaped hole (35), and the electric rotary table (34) is located on the inner side of the strip-shaped hole (35). The lower surface of the operation platform (1) is fixedly provided with a guide frame (36), and the bottom shell of the electric rotary table (34) is slidably connected with the guide frame (36).

5. The apparatus for ultrasonic welding of a ready-to-fill bottle cap sealing film according to claim 1, wherein The outer wall of the positioning block (42) is rotatably provided with a worm gear rotating ring (41), the worm gear rotating ring (41) is located between the support plate (32) and the worm gear rotating ring (41), the edge of the positioning block (42) is provided with an extension block (47), the worm gear rotating ring (41) is rotatably arranged in the extension block (47), and the worm gear (410) is engaged with the worm gear rotating ring (41).

6. An apparatus for ultrasonic welding of a ready-to-fill bottle closure sealing film according to claim 5, characterized in that The extension block (47) is provided with a rectangular notch (411) on one side close to the worm gear runner (41), the shape of the rectangular notch (411) is matched with the worm gear runner (41), the inside of the worm gear runner (41) is slidably provided with clamping rods (44), the clamping rods (44) are equally spaced at the four quarter points of the worm gear runner (41), and the intersection of the worm gear runner (41) and the clamping rods (44) is provided with an inclined groove (45), the edge of the positioning block (42) is radially and equally spaced provided with guide holes (46), and the rod body of the clamping rod (44) is slidably arranged on the inside of the guide hole (46).

7. An apparatus for ultrasonic welding of a ready-to-fill bottle closure sealing film according to claim 6, characterized in that The top of the positioning block (42) is overlapped with a bearing plate (43), the inside of the positioning block (42) is provided with a cavity (48), the inside of the cavity (48) is provided with a discharging mechanism (5), the top of the extension block (47) is rotatably provided with a pressing block (49), and the end of the pressing block (49) is overlapped on the upper surface of the bearing plate (43).

8. The apparatus for ultrasonic welding of a ready-to-fill bottle cap sealing film according to claim 2, wherein The discharging mechanism (5) comprises a bottom plate (51), the shape of the bottom plate (51) is matched with the cavity (48), and the bottom plate (51) is slidably arranged on the inside of the cavity (48), and the second spring (57) is connected between the lower surface of the bottom plate (51) and the bottom of the cavity (48).

9. An apparatus for ultrasonic welding of a ready-to-fill bottle closure sealing film according to claim 8, characterized in that The upper surface of the bottom plate (51) is fixedly provided with a first link frame (52), the end of the first link frame (52) is rotatably connected with a first link rod (55), the end of the first link rod (55) is provided with a bent portion (59), the lower surface of the bearing plate (43) is rotatably connected with a second link frame (53), one end of the first link rod (55) is rotatably connected with the middle segment of the second link frame (53), the end of the second link frame (53) is rotatably connected with a second link rod (56), one end of the second link rod (56) is rotatably connected with the middle segment of the first link frame (52), the side surface of the second link frame (53) and the side surface of the first link frame (52) are both provided with protrusions (58), and the two protrusions (58) are fixedly connected with a first spring (54).

10. A method of ultrasonic welding of a ready-to-use bottle cap sealing film, characterized by, The steps include: S1, bottle cap placement: place the bottle cap to be welded with the sealing film on the bearing plate (43), and rotate the bearing plate (43) to the horizontal state, then continuously press the bearing plate (43) to make the inner wall of the bottle cap preliminarily adhere to the top of the positioning block (42); S2, double fixing: rotate the top pressing block (49) of the extension block (47) to make the end of the pressing block (49) overlap the bearing plate (43) to fix the bearing plate (43), rotate the worm gear runner (41) in the extension block (47) to make the four equally spaced clamping rods (44) radially extend and tightly abut against the inner wall of the bottle cap, and realize the centering and clamping of the bottle cap; S3, positioning adjustment: for large-size bottle caps with an area larger than the welding head, start the electric cylinder (33) to push the support plate (32) to translate along the guide rail (31), drive the bearing mechanism (4) and the bottle cap to move close to or away from the welding head, the electric rotary table (34) translates synchronously with the support plate (32), the positioning block (42) is driven to slide horizontally to finely adjust the position of the bottle cap, and small-size bottle caps do not need fine adjustment. S4, ultrasonic welding: start the welding machine main body (2), adjust the ultrasonic power, welding time parameters, control the welding head down to the bottle cap and its bottom sealing film contact, make the sealing film and bottle cap contact part friction heat melting and fusion under pressure, at the same time start the electric rotary table (34) drive bearing mechanism (4) and bottle cap rotation, make the bottle cap edge full contact with the welding head in turn and complete uniform fusion, vibration stop after cooling and setting; S5, automatic discharge: reverse rotation of the worm (410) make the clamping rod (44) along the guide hole (46) radial movement, release the clamping of the bottle cap, then rotate the pressing block (49), make its end away from the bearing plate (43) to release the axial compression, finally the discharge mechanism (5) automatically eject the bottle cap.

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