Cosmetic plastic hose automatic high-speed forming machine

Abstract

The application discloses a kind of cosmetic plastic hose automatic high-speed forming machine, it is related to plastic processing machinery technical field, to solve the problem of low efficiency and poor flexibility of traditional linear serial pipe making machine.The equipment includes body, rotary drive mechanism, center table, rotating ring and multiple groups of forming grooves arranged along its circumference.Four stations are provided on the outer periphery of the rotating ring, corresponding to the feeding and cutting, bending forming, ultrasonic welding and unloading processes respectively, to realize parallel operation.The innovation lies in that the linear speed of the rotating ring is greater than the linear speed of the feeding roller, which automatically tensions the plastic strip when it is attracted, achieving high-precision dynamic fixed length and positioning.The retraction stroke of the linear driver and the forming drive arm is controlled by the electromagnetic drive module, thereby accurately adjusting the overlap width of the unit film after bending.The integrated gas path system realizes attraction, retention and automatic unloading.The application converts serial process to parallel, breaking through the speed bottleneck.

Description

Technical Field

[0001] This invention relates to the field of plastic processing machinery technology, and in particular to an automatic high-speed molding machine for cosmetic plastic tubes. Background Technology

[0002] In the cosmetic packaging industry, plastic tubes are widely used due to their advantages such as ease of use, good sealing performance, and moderate cost. Their tube bodies are typically made from multi-layered composite plastic sheets (such as aluminum-plastic composite (ABL) or all-plastic composite (PBL)) through a series of processes including heating, rolling, longitudinal welding, cooling and shaping, and length cutting. The core equipment that completes this series of processes is usually referred to as a "fully automatic composite tube manufacturing machine."

[0003] Currently, most fully automatic tube-making machines on the market adopt a linear serial layout. Their typical workflow is as follows: A rolled composite sheet is unwound from one end of the machine and, after passing through a guide roller system, is first softened by a preheating device in a specific area. Then, the softened sheet is fed into a precision rolling die, gradually bending it into a cylindrical shape and overlapping the edges. Next, the cylinder is sent to a welding station (usually using high-frequency welding or ultrasonic welding technology) to fuse and seal the longitudinal overlap. The welded tube is then shaped in a cooling section and finally pulled by a traction mechanism, cut into individual tubes of predetermined length at the cutting station. Throughout the entire production process, the material travels along a straight path, sequentially passing through each functional station.

[0004] This traditional linear serial layout has inherent technical bottlenecks, which severely restrict production efficiency and equipment flexibility:

[0005] Production cycle time is limited by the slowest process: Since all processes are connected in a straight line, if any process (especially the time-consuming welding process) is not completed, the subsequent processes must wait. The overall production speed of the machine depends on the longest process among all processes. Unilaterally increasing the speed of a certain process (such as welding) in order to increase theoretical capacity often leads to unstable quality of that process (such as incomplete welds or over-welding), creating a contradiction between speed and quality.

[0006] Insufficient flexible production capacity: When it is necessary to change to produce hose products of different diameters or lengths, multiple independent mechanical adjustments are usually required to the rolling die, welding head position, traction and cutting parameters, etc. The process is cumbersome and time-consuming, making it difficult to adapt to the current market demand for rapid response to small-batch, multi-variety orders.

[0007] Therefore, how to break through the inherent limitations of the traditional linear serial layout and design a new type of tube-making machine that can significantly improve production efficiency and enhance equipment flexibility while ensuring or even improving product quality (especially welding quality) has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0008] The purpose of this invention is to address the shortcomings of existing technologies by proposing an automatic high-speed molding machine for cosmetic plastic tubes.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] An automatic high-speed molding machine for cosmetic plastic tubes includes:

[0011] The machine body has a processing platform on its upper surface and a rotary drive mechanism fixedly installed on the lower surface of the processing platform.

[0012] A rotary forming assembly includes a central platform and a rotating ring arranged coaxially. The central platform is fixed on a processing platform, and the rotating ring is rotatably fitted outside the central platform and driven by the rotary drive mechanism to perform intermittent indexing rotation. Multiple forming grooves are formed on the outer circumferential surface of the rotating ring.

[0013] The negative pressure adsorption system includes a first air channel disposed inside the rotating ring and a negative pressure micropore array communicating with the first air channel, wherein the negative pressure micropore array is distributed on both sides of the opening of each of the forming grooves.

[0014] The feeding and cutting assembly is located at the first station on the outer periphery of the rotating ring, and includes a feeding mechanism for conveying the plastic strip and a cutting mechanism for cutting the plastic strip to form a unit film.

[0015] The bending and forming assembly includes an electromagnetic drive module, a linear actuator, and a forming drive arm. The electromagnetic drive module is disposed on the central platform, the linear actuator is mounted on the rotating ring, and its telescopic end is connected to the forming drive arm. The surface of the forming drive arm is provided with adsorption holes, which are connected to an external air source through a second air passage inside the rotating ring.

[0016] An ultrasonic welding assembly is located at the third station on the outer periphery of the rotating ring and is used to weld the overlapping seams of the unit membrane that is bent into a cylindrical shape.

[0017] The electrical control system is electrically connected to the rotary drive mechanism, the feeding mechanism, the cutting mechanism, the electromagnetic drive module, and the ultrasonic welding assembly.

[0018] The rotation of the rotating ring causes each of the forming grooves to pass through the first station and the third station in sequence. The negative pressure micropore array is used to adsorb and fix the unit membrane at the first station. The electrical control system controls the electromagnetic drive module to generate a magnetic field, which drives the linear drive to move and thereby drives the forming drive arm to pull the unit membrane into the forming groove and bend it into a cylindrical shape. The ultrasonic welding assembly welds the cylindrical unit membrane at the third station to form a tube.

[0019] Preferably, the feeding mechanism includes a drive roller and a pressing roller rotatably mounted on the upper side of the processing platform, through which the plastic strip passes; the drive roller is driven by a servo motor; at the first station, the front end of the plastic strip is adsorbed and fixed to the surface of the rotating ring by the negative pressure micropore array, and is tensioned under the action of the linear velocity difference between the drive roller and the rotating ring, and the cutting mechanism cuts the tensioned plastic strip to form a unit film.

[0020] The cutting mechanism is a laser cutter, and its light output path is aligned with the plastic strip that is adsorbed onto the surface of the rotating ring.

[0021] Preferably, the linear actuator includes a base and a telescopic link. The base is fixed to the upper surface of the rotating ring, and the telescopic link is slidably installed inside the base. A preload spring is provided inside the base to press against the extension of the telescopic link. The forming drive arm is fixedly installed at one end of the telescopic link, and a magnetic block is fixedly installed at the other end of the telescopic link. A displacement sensor is provided on the side of the electromagnetic drive module facing the magnetic block.

[0022] Preferably, the ultrasonic welding assembly includes a mounting frame fixed on the processing platform, a welding head disposed within the mounting frame, an electric push rod for driving the welding head to reciprocate is fixedly mounted on the surface of the mounting frame, a driving cylinder is fixedly mounted on the upper side of the mounting frame, and a positioning column is fixedly mounted on the telescopic end of the driving cylinder. When the forming groove carrying the unit membrane rotates to the third working position, the driving cylinder drives the positioning column to extend downward, and the electric push rod drives the welding head to approach the positioning column. A predetermined pressure is applied to the overlap seam of the unit membrane through the welding head and the positioning column, triggering ultrasonic welding.

[0023] Preferably, the central platform has a first annular cavity and a second annular cavity inside, and a first air source connector and a second air source connector are fixedly installed on the surface of the central platform; the first air source connector communicates with the first annular cavity, the first air passage communicates with the first annular cavity through a hole on the inner side of the rotating ring, and the second air source connector communicates with the second annular cavity; two sets of guide holes are opened on the stepped surface of the central platform, and the two sets of guide holes are respectively located in the third and fourth working positions on the outer periphery of the rotating ring, and the second annular cavity communicates with the second air passage through the two sets of guide holes.

[0024] The rotating ring is provided with a third air passage. The upper end of the third air passage is connected to the second air passage, and the lower end of the third air passage is located on the bottom surface of the rotating ring. A vent hole is opened on the stepped surface of the central platform corresponding to the fourth work station. When the rotating ring rotates, the lower end of each third air passage is aligned with the vent hole when the third air passage passes through the fourth work station in sequence.

[0025] Preferably, the machine body is provided with an unloading conveyor belt, which is arranged below the fourth station on the outer periphery of the rotating ring.

[0026] The rotary drive mechanism is a stepper motor, and the rotating end of the stepper motor passes through the central platform and is fixedly connected to the rotating ring through a connecting cover plate.

[0027] The present invention has the following beneficial effects:

[0028] 1. The forming machine proposed in this invention abandons the linear serial layout of traditional tube making machines. In traditional equipment, plastic strips must complete the serial actions of rolling, welding, and cutting in sequence. Its cycle time is limited by the most time-consuming welding process. Forcibly shortening the welding time to increase speed will directly lead to a decrease in weld quality. However, this invention uses a rotating ring with four stations (feeding / cutting, bending, welding, and unloading) distributed in a circular shape in space. Each station can process multiple (e.g., three) tubes at the same time, trading space for time and turning the serial process into a parallel one. The welding station can work continuously, and its speed no longer restricts the cycle time of the whole machine. This allows for the simultaneous realization of increased tube making speed and high-quality welding, breaking through the speed bottleneck of serial processes.

[0029] 2. The molding machine proposed in this invention achieves the change of product diameter through two sets of structures: First, the servo motor of the feeding mechanism precisely controls the feeding length of the drive roller (i.e., the unit film length); Second, the target diameter is matched by changing the rotating ring of the forming groove with different arc lengths.

[0030] The length of the products can be changed by replacing plastic strips of different widths, making it possible to adjust the diameter and length of the products, which perfectly meets the needs of small-batch, multi-variety customized production.

[0031] It should be noted that the core of the feeding mechanism lies in controlling the linear speed V2 of the drive roller to be less than the linear speed V1 of the rotating ring. This speed difference (V1-V2) automatically tensions the plastic strip during the adsorption process by the rotating ring, ensuring the strip head is tightly against the outer wall of the ring, thus achieving accurate positioning of the unit film after cutting. This design offers advantages: it ensures that each unit film covers the forming groove opening with the same and accurate posture, and the unit films on both sides of the forming groove opening are asymmetrical, allowing for a certain overlap width after the unit film is bent. This overlap width is crucial; it allows for fine-tuning of the tube diameter, and a stable overlap width provides essential stable process conditions for subsequent high-quality ultrasonic welding.

[0032] 3. The forming machine proposed in this invention uses a linear actuator to drive the forming drive arm, which in turn drives the linear actuator to move. The electrical control system controls the electromagnetic drive module to generate a magnetic field, which in turn drives the forming drive arm to pull the unit film into the forming groove and bend it into a cylindrical shape. In other words, the retraction stroke of the forming drive arm directly determines the wrapping depth of the unit film in the forming groove, thereby precisely setting the width of the overlap seam. This stroke can be precisely set by the control system for the linear actuator. This means that the control of the key welding process parameter (overlap width) is transformed into precise control of the stroke of the moving parts, making the adjustment intuitive and accurate. Furthermore, considering the different shrinkage rates of different plastic materials after welding, the program can preset the fine-tuning compensation amount of the forming drive arm stroke for different materials, achieving self-adaptation of welding quality and improving the equipment's process adaptability to products of different materials and pipe diameters.

[0033] 4. In the molding machine proposed in this invention, during the unloading process, the linear drive is reset (or driven by the pre-tightening spring) and the tube is gently pushed out. When the pushed-out tube rotates with the rotating ring to the fourth position, its third air passage is connected to the pressure relief hole. At this time, the negative pressure in the adsorption hole is briefly switched to normal pressure, eliminating the adsorption force. The tube adsorbed on the molding drive arm falls down, realizing automatic unloading. No robotic arm or manual assistance is required. The operation is reliable and smooth, realizing high-speed continuous production and reducing labor costs and labor intensity. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the three-dimensional structure of the molding machine proposed in this invention. Figure 1 .

[0035] Figure 2 This is a schematic diagram of the three-dimensional structure of the molding machine proposed in this invention. Figure 2 .

[0036] Figure 3 This is a top-section schematic diagram of the molding machine proposed in this invention.

[0037] Figure 4 This is a top view schematic diagram of the four stations on the outer periphery of the rotating ring proposed in this invention.

[0038] Figure 5 This is a schematic diagram of the three-dimensional structure of the central platform and rotating ring proposed in this invention. Figure 1 .

[0039] Figure 6 This is a three-dimensional structural diagram of the central platform and rotating ring proposed in this invention. Figure 2 .

[0040] Figure 7 This is a three-dimensional cross-sectional schematic diagram of the central platform and rotating ring proposed in this invention.

[0041] Figure 8 This is a partial side-section structural diagram of the molding machine proposed in this invention.

[0042] Figure 9 This is a schematic diagram of the front section structure of the ultrasonic welding assembly proposed in this invention.

[0043] Figure 10 This is a schematic diagram of the feeding process of the feeding and cutting assembly proposed in this invention.

[0044] Figure 11 This is a schematic diagram of the tube manufacturing process of the bending and forming component proposed in this invention.

[0045] In the picture:

[0046] 101. Processing platform; 102. Rotary drive mechanism; 103. Unloading conveyor belt;

[0047] 201. Central platform; 202. Rotating ring; 203. Forming groove; 204. First air passage; 205. Second air passage; 206. Negative pressure micropore array; 207. First annular cavity; 208. Second annular cavity; 209. First air source connector; 210. Second air source connector; 211. Third air passage; 212. Vent hole; 213. Guide hole;

[0048] 301. Drive roller; 302. Pressure roller; 303. Laser cutter;

[0049] 401. Electromagnetic drive module; 402. Linear actuator; 403. Forming drive arm; 404. Adsorption hole; 405. Base; 406. Telescopic link; 407. Preload spring; 408. Magnetic block; 409. Displacement sensor;

[0050] 500. Ultrasonic welding assembly; 501. Mounting bracket; 502. Welding head; 503. Electric actuator; 504. Drive cylinder; 505. Positioning pin;

[0051] Wherein, A is a plastic strip; B is a unit film formed by cutting the plastic strip; and C is a tube formed by bending and welding the unit film. Detailed Implementation

[0052] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0053] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0054] Example 1

[0055] This embodiment provides the overall architecture of an automatic high-speed molding machine for cosmetic plastic tubes, referring to... Figures 1-9 It includes: a body, a rotary drive mechanism 102, a rotary forming assembly, a negative pressure adsorption system, a feeding and cutting assembly, a bending forming assembly, an ultrasonic welding assembly 500, and an electrical control system.

[0056] Specifically, the machine body has a processing platform 101 on its upper surface, and a rotary drive mechanism 102 is fixedly installed on the lower surface of the processing platform 101. The rotary drive mechanism 102 is a stepper motor. The machine body is equipped with an unloading conveyor belt 103.

[0057] The rotary forming assembly includes a coaxially arranged center stage 201 and a rotating ring 202. The center stage 201 is fixed to the processing platform 101, and the rotating ring 202 is rotatably fitted outside the center stage 201 and driven by a rotary drive mechanism 102 to perform intermittent indexing rotation. (Reference) Figure 8 The rotating end of the stepper motor passes through the central platform 201 and is fixedly connected to the rotating ring 202 via a connecting cover plate; the outer circumferential surface of the rotating ring 202 has multiple sets of forming grooves 203; such as Figure 3 , Figure 4 As shown, this embodiment takes three forming grooves 203 per group as an example. There are a total of four groups and twelve forming grooves 203 in one revolution of the rotating ring 202. The outer periphery of the rotating ring 202 is divided into the first station, the second station, the third station and the fourth station.

[0058] Negative pressure adsorption system, reference Figure 7 , Figure 8It includes a first air passage 204 disposed inside the rotating ring 202 and a negative pressure micropore array 206 connected to the first air passage 204. The negative pressure micropore array 206 is distributed on both sides of the groove opening of each molding groove 203.

[0059] For feeding and cutting components, please refer to... Figure 1 Three sets of feeding and cutting components are set at the first station on the outer periphery of the rotating ring 202, including a feeding mechanism for conveying plastic strip A and a cutting mechanism for cutting plastic strip A to form unit film B.

[0060] Bending and forming components, reference Figure 1 It includes an electromagnetic drive module 401, a linear actuator 402, and a forming drive arm 403. The number of linear actuators 402 and forming drive arms 403 is the same as the number of forming slots 203. The electromagnetic drive module 401 is mounted on the center platform 201, and the linear actuator 402 is mounted on the rotating ring 202, with its telescopic end connected to the forming drive arm 403. (Refer to...) Figure 2 The surface of the forming drive arm 403 is provided with adsorption holes 404, for reference. Figure 9 The adsorption hole 404 is connected to an external air source through the second air passage 205 inside the rotating ring 202;

[0061] Ultrasonic welding assembly 500, reference Figure 1 Three sets of ultrasonic welding components 500 are set at the third station on the outer periphery of the rotating ring 202 for welding the overlapping seams of the unit membrane B which is bent into a cylindrical shape.

[0062] The electrical control system (such as a PLC or industrial computer) is electrically connected to the rotary drive mechanism 102, the feeding mechanism, the cutting mechanism, the electromagnetic drive module 401, and the ultrasonic welding assembly 500 to coordinate and control the actions of each component.

[0063] The device operates as follows:

[0064] The rotary drive mechanism 102 drives the rotating ring 202 to rotate intermittently. (Reference) Figure 4When an empty forming tank 203 rotates to the first station, the feeding mechanism delivers plastic strip A to the surface of the rotating ring 202. The negative pressure microporous array 206 adsorbs and fixes it, and then the cutting mechanism cuts it to form a unit film. The rotating ring 202 continues to rotate to the second station, and then carries the unit film B to the third station (bending station). At this time, the electrical control system controls the electromagnetic drive module 401 to start, driving the linear driver 402 to move, which drives the forming drive arm 403 to pull the unit film, bending it into the forming tank 203 to form a cylindrical shape. Next, the ultrasonic welding assembly 500 welds the overlapping seams of the cylindrical unit film to form a complete tube. Finally, the tube C is carried to the fourth station, and after detaching from the adsorption, it falls onto the unloading conveyor belt 103 for output. In this process, different processes are carried out simultaneously at the four stations, realizing parallel production. The three sets of ultrasonic welding assemblies 500 work at the same time, and the welding process has sufficient time, thus breaking through the "speed-quality" contradiction bottleneck of traditional serial equipment.

[0065] Example 2

[0066] This embodiment is a further optimization and detailed explanation of the feeding and cutting assembly in Embodiment 1.

[0067] See Figure 3 The feeding mechanism includes a drive roller 301 and a pressure roller 302 rotatably mounted on the upper side of the processing platform 101. The plastic strip A passes through the gap between the drive roller 301 and the pressure roller 302. The drive roller 301 is precisely driven by a servo motor. The cutting mechanism is a laser cutter 303, whose output beam is precisely aligned with the plastic strip adsorbed on the surface of the rotating ring 202.

[0068] The electrical control system is configured to: during material feeding, such as Figure 10 As shown, the tangential velocity (linear velocity) of the outer circumference of the rotating ring 202 is controlled as V1, and the tangential velocity (linear velocity) of the drive roller 301 is controlled as V2, with V1 always greater than V2. When the front end of the plastic strip A is fed to the first station and adsorbed onto the surface of the rotating ring 202 by the negative pressure microporous array 206, the section between the adsorption point of the plastic strip A on the surface of the rotating ring 202 and the drive roller 301 will be automatically tensioned because V1>V2. Then, when the feeding reaches the set length, V1=0, V2=0, the laser cutter 303 emits a laser to cut the tensioned plastic strip A, forming a precisely lengthened unit film, such as... Figure 4 As shown at point B in the middle.

[0069] This "dynamic constant length due to speed difference" design brings key benefits: such as Figure 4As shown at point B, this ensures that each unit membrane B, after being cut, is taut and accurately positioned, perfectly covering the preset area of ​​the forming groove 203. This lays a crucial foundation for the subsequent bending process to form an overlap seam with consistent width and precise positioning, and is one of the core prerequisites for ensuring the stability of the final welding quality.

[0070] Example 3

[0071] This embodiment is a further optimization and detailed explanation of the bending and forming component in Embodiment 1, revealing in detail how its mechanical structure achieves precise control over the weld overlap width.

[0072] See Figure 9 The linear actuator 402 includes a base 405 fixed to the upper surface of the rotating ring 202. A telescopic link 406 slidably passes through the base 405. A preload spring 407 is installed within the base 405, one end of which abuts against the inner wall of the base 405, and the other end abuts against the stepped surface of the telescopic link 406, thereby always providing an elastic force that causes the telescopic link 406 to extend outward. A forming drive arm 403 is fixedly mounted on one end of the telescopic link 406. A magnet 408 is fixedly mounted on the other end of the telescopic link 406.

[0073] The electromagnetic drive module 401 is fixedly mounted on the center platform 201, and its position corresponds to the third station (bending station) on the rotation path of the rotating ring 202. On the side of the electromagnetic drive module 401 facing the magnetic block 408, a displacement sensor 409 is also installed to detect the telescopic displacement of the telescopic link 406.

[0074] Among them, such as Figure 9 As shown, the telescopic connecting rod 406 and the forming drive arm 403 are provided with air passage holes, and the second air passage 205 is connected to the adsorption hole 404 through the air passage holes.

[0075] The bending process is as follows:

[0076] refer to Figure 11 When the forming tank 203 carrying unit membrane B rotates to the third position, the electromagnetic drive module 401 is energized under the command of the electrical control system, generating a strong magnetic field. This magnetic field attracts the magnetic block 408, overcoming the elastic force of the pre-tension spring 407, and pulls the telescopic connecting rod 406 and the forming drive arm 403 to move radially (retract) towards the rotating ring 202. Under the action of negative pressure, the adsorption holes 404 on the forming drive arm 403 firmly hold the unit membrane. As the forming drive arm 403 retracts, the unit membrane B is gradually pulled into the forming tank 203, completing the bending. The displacement sensor 409 monitors the displacement of the magnetic block 408 in real time, i.e., the retraction stroke of the forming drive arm 403, and feeds it back to the control system.

[0077] like Figure 11 As shown in Figure d, the retraction stroke of the forming drive arm 403 directly determines the depth to which the unit membrane is wrapped, thus precisely setting the width of the final overlap (i.e., the amount of overlap). This stroke can be precisely controlled by the program through the current or the duration of action of the electromagnetic drive module 401. This means that the core welding process parameter "overlap width" is transformed into precise control of the "stroke" of the moving parts, making the adjustment intuitive and accurate. Furthermore, considering the different shrinkage rates of different plastic materials after welding, different stroke fine-tuning compensation amounts can be preset for different materials in the program to achieve adaptive optimization of welding quality, ensuring that the diameter of the final tube meets the requirements.

[0078] It should be noted that the change of the diameter of the produced products is achieved through two sets of structures: First, the servo motor of the feeding mechanism precisely controls the feeding length of the drive roller 301 (i.e., the length of the unit film B); Second, when switching to products with large diameter differences, the target diameter is matched by changing the rotating ring 202 of the forming groove 203 with different arc lengths.

[0079] Example 4

[0080] This embodiment is a further optimization and detailed explanation of the ultrasonic welding assembly 500 in Embodiment 1.

[0081] See Figure 9 The ultrasonic welding assembly 500 includes a mounting bracket 501 fixed on a processing platform 101. A horizontally sliding welding head 502 is disposed within the mounting bracket 501 and is connected to an ultrasonic generator (not shown). An electric push rod 503 is fixedly mounted on the side of the mounting bracket 501, its telescopic end connected to the welding head 502, for driving the welding head 502 to move horizontally reciprocally. A drive cylinder 504 is fixedly mounted above the mounting bracket 501, its telescopic end pointing vertically downwards, and a positioning post 505 is fixedly mounted thereon.

[0082] The welding process is as follows: After the bent cylindrical unit membrane rotates with the rotating ring 202 to the third position and stops, the electrical control system first controls the drive cylinder 504 to move, driving the positioning column 505 to extend downwards. Figure 11 As shown in Figure d, the welding head 502 is precisely inserted into the interior of the cylindrical unit membrane, serving as the "lower mold" or support reference for welding. Subsequently, the control system activates the electric push rod 503, driving the welding head 502 forward horizontally, pressing it against the overlapping seam area on the outside of the unit membrane, as shown in Figure d. Figure 11 As shown in Figure e, the lap joint is currently clamped between the welding head 502 and the positioning post 505. Then, the ultrasonic generator is triggered, and the welding head 502 outputs ultrasonic vibration energy to fuse the plastic at the lap joint. After welding is completed, the welding head 502 retracts, and the positioning post 505 rises to its original position.

[0083] The structure of this embodiment provides stable support from inside the tube through the cooperation of the drive cylinder 504 and the positioning column 505, and forms precise pressure with the external welding head 502, ensuring uniform pressure and accurate positioning during the welding process, thereby effectively guaranteeing the strength and sealing consistency of the weld.

[0084] Example 5

[0085] This embodiment is a further optimization and detailed explanation of the air circuit system and automatic unloading principle in Embodiment 1, and elaborates on how to achieve automatic unloading through integrated air circuit design.

[0086] See Figure 8 and Figure 9 The central platform 201 has a first annular cavity 207 and a second annular cavity 208 that are isolated from each other. A first air source connector 209 and a second air source connector 210 are fixedly installed on the surface of the central platform 201. The first air source connector 209 communicates with the first annular cavity 207, and the second air source connector 210 communicates with the second annular cavity 208. Both the first air source connector 209 and the second air source connector 210 are externally connected to a vacuum generator, serving as the overall source of the adsorption negative pressure.

[0087] like Figure 7 As shown, the inner side of the rotating ring 202 has annularly distributed connecting holes corresponding to the position of the first annular cavity 207, so that no matter where the rotating ring 202 rotates, the first air passage 204 inside it always remains connected to the first annular cavity 207 through these connecting holes. The first air passage 204 is connected to the negative pressure micropore array 206 at various locations. In this way, a continuous negative pressure is supplied to all negative pressure micropore arrays 206 on the entire rotating ring 202.

[0088] like Figure 5 As shown, two sets of guide holes 213 are provided on the stepped surface where the central platform 201 mates with the rotating ring 202. In this embodiment, each set has three guide holes 213. The positions of these two sets of guide holes 213 precisely correspond to the third station (welding station) and the fourth station (unloading station) on the outer circumference of the rotating ring 202, respectively. Figure 7 As shown, the second annular cavity 208 is connected to the two sets of guide holes 213 through internal channels.

[0089] refer to Figure 9 Inside the rotating ring 202, a second air passage 205 is independently provided for each adsorption hole 404 corresponding to each forming drive arm 403. At the bottom of the rotating ring 202, a third air passage 211 is also machined. The upper end of the third air passage 211 is connected to the second air passage 205, and its lower end opens to the bottom surface of the rotating ring 202.

[0090] Its working logic is as follows:

[0091] Grasping and Holding Stage: When the rotating ring 202 rotates, causing the port of a certain second air passage 205 to pass through the guide hole 213 corresponding to the third station, the second air passage 205 connects to the second annular cavity 208 through the guide hole 213, thereby obtaining negative pressure, causing the corresponding adsorption hole 404 to generate suction, thus grasping and holding the unit membrane during the bending process, such as... Figure 11 As shown.

[0092] Welding stage: In the third station, the negative pressure is maintained to stabilize the pipe body for welding, such as... Figure 11 As shown in Figure e.

[0093] Automatic unloading stage: such as Figure 8 As shown, when the welded pipe body C rotates to the fourth position with the rotating ring 202, the lower opening of the third air passage 211 is aligned with the vent hole 212 on the stepped surface of the central platform 201. The vent hole 212 is connected to the atmosphere. At this time, the entire passage from the third air passage 211, the second air passage 205 to the adsorption hole 404 is connected to the atmosphere through the vent hole 212, and the negative pressure is instantly destroyed. Simultaneously, the electromagnetic drive module 401 is de-energized, and the linear actuator 402 is reset under the action of the preload spring 407, as... Figure 11 As shown in Figure f, the forming drive arm 403 resets and gently pushes out the tube C. Under the action of gravity, as... Figure 8 As shown, pipe C automatically falls onto the unloading conveyor belt 103 below, completing the unloading process without damage. The entire process requires no additional robotic arm, demonstrating ingenious structure and reliable operation.

[0094] 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 automatic high-speed forming machine for cosmetic plastic hoses, characterized in that, The utility model relates to a kind of automatic production equipment of plastic pipe, including: Machine body, the upper surface is processing platform (101), the lower surface of the processing platform (101) is fixedly installed with rotary drive mechanism (102); Rotary forming assembly, including coaxially arranged center table (201) and rotating ring (202), the center table (201) is fixed on processing platform (101), the rotating ring (202) is rotatably sleeved on the outside of the center table (201) and is driven by the rotary drive mechanism (102) to carry out intermittent indexing rotation, the outer circumferential surface of the rotating ring (202) is provided with multiple forming grooves (203); Negative pressure adsorption system, including first air passage (204) arranged in the rotating ring (202), and negative pressure micropore array (206) communicated with the first air passage (204), the negative pressure micropore array (206) is distributed in the slot opening of each forming groove (203); Feeding and cutting assembly, first station is arranged on the periphery of the rotating ring (202), including feeding mechanism for conveying plastic belt and cutting mechanism for cutting the plastic belt to form unit film; Bending forming assembly, including electromagnetic drive module (401), linear driver (402) and forming drive arm (403), the electromagnetic drive module (401) is arranged on the center table (201), the linear driver (402) is installed on the rotating ring (202), and the telescopic end is connected with the forming drive arm (403), the surface of the forming drive arm (403) is provided with adsorption hole (404), the adsorption hole (404) is communicated with external gas source by second air passage (205) in the rotating ring (202); Ultrasonic welding assembly (500), third station is arranged on the periphery of the rotating ring (202), for welding the lap seam of the unit film bent into cylindrical shape; Electrical control system, electrically connected with the rotary drive mechanism (102), feeding mechanism, cutting mechanism, electromagnetic drive module (401) and ultrasonic welding assembly (500); Wherein, the rotation of the rotating ring (202) makes each forming groove (203) pass through the first station, third station in turn, the negative pressure micropore array (206) is used for adsorbing and fixing the unit film in the first station, the electrical control system controls the electromagnetic drive module (401) to generate magnetic field, drives the linear driver (402) to act, and then drives the forming drive arm (403) to pull the unit film into the forming groove (203) and bend into cylindrical shape, the ultrasonic welding assembly (500) is welded in the third station to form pipe body. The feeding mechanism comprises a driving roller (301) and a pressing roller (302) rotatably installed on the upper side of the processing platform (101), and the plastic belt passes between the two rollers; the driving roller (301) is driven by a servo motor; at the first station, the front end of the plastic belt is adsorbed and fixed on the surface of the rotating ring (202) by the negative pressure micro-hole array (206), and is tensioned under the action of the linear speed difference between the driving roller (301) and the rotating ring (202), and the cutting mechanism cuts the tensioned plastic belt to form a unit film.

2. The automatic high-speed forming machine for cosmetic plastic hoses according to claim 1, characterized in that: The cutting mechanism is a laser cutter (303), and the light path of the laser cutter is aligned with the plastic belt adsorbed on the surface of the rotating ring (202).

3. The automatic high-speed forming machine for cosmetic plastic hoses according to claim 1, characterized in that: The linear driver (402) comprises a base (405) and a telescopic connecting rod (406), the base (405) is fixed on the upper surface of the rotating ring (202), the telescopic connecting rod (406) is slidingly installed in the base (405), a pre-tightening spring (407) is arranged in the base (405) to abut against the telescopic connecting rod (406), a forming driving arm (403) is fixedly installed at one end of the telescopic connecting rod (406), a magnetic block (408) is fixedly installed at the other end of the telescopic connecting rod (406), and a displacement sensor (409) is arranged on the side of the electromagnetic driving module (401) facing the magnetic block (408).

4. The automatic high-speed forming machine for cosmetic plastic hoses according to claim 1, characterized in that: The ultrasonic welding assembly (500) comprises a mounting bracket (501) fixed on the processing platform (101), the mounting bracket (501) is provided with a welding head (502) therein, the surface of the mounting bracket (501) is fixedly provided with an electric push rod (503) for driving the welding head (502) to move back and forth, the upper side of the mounting bracket (501) is fixedly provided with a driving cylinder (504), and the telescopic end of the driving cylinder (504) is fixedly provided with a positioning column (505); when the forming groove (203) carrying the unit film rotates to the third station, the driving cylinder (504) drives the positioning column (505) to extend downward, the electric push rod (503) drives the welding head (502) to move close to the positioning column (505), and a predetermined pressure is applied to the lap joint of the unit film by the welding head (502) and the positioning column (505) to trigger ultrasonic welding.

5. The automatic high-speed forming machine for cosmetic plastic hoses according to claim 1, characterized in that: The inside of the center table (201) is provided with a first annular cavity (207) and a second annular cavity (208), and the surface of the center table (201) is fixedly provided with a first gas source connector (209) and a second gas source connector (210); the first gas source connector (209) is communicated with the first annular cavity (207), the first gas channel (204) is communicated with the first annular cavity (207) through the hole in the inner side of the rotating ring (202), and the second gas source connector (210) is communicated with the second annular cavity (208); two groups of flow guide holes (213) are arranged on the stepped surface of the center table (201), and the two groups of flow guide holes (213) are respectively located in the third station and the fourth station regions of the outer periphery of the rotating ring (202), and the second annular cavity (208) is communicated with the second gas channel (205) through the two groups of flow guide holes (213).

6. The automatic high-speed forming machine for cosmetic plastic hoses according to claim 5, characterized in that: A third gas channel (211) is arranged in the rotating ring (202), the upper end of the third gas channel (211) is communicated with the second gas channel (205), the lower end of the third gas channel (211) is arranged on the bottom surface of the rotating ring (202), a gas exhaust hole (212) is arranged on the stepped surface of the center table (201) corresponding to the fourth station, and the rotation of the rotating ring (202) makes the lower end of each third gas channel (211) align with the gas exhaust hole (212) when passing through the fourth station.

7. The automatic high-speed forming machine for cosmetic plastic hoses according to claim 1, characterized in that: A discharging conveying belt (103) is arranged on the machine body, and the discharging conveying belt (103) is arranged below the fourth station of the outer periphery of the rotating ring (202).

8. The automatic high-speed forming machine for cosmetic plastic hoses according to claim 1, characterized in that: The rotary drive mechanism (102) is a step-down motor, and the rotating end of the step-down motor penetrates through the center table (201) and is fixedly connected with the rotating ring (202) through a connecting cover plate.

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