Ultrasonic welding mechanism for non-woven fabric
By using the pressure sensor and PID CNC system in non -woven ultrasonic welding equipment, automatically adjust the distance between the welding ting and the bottom roller, solve the problem of unstable pressure of the welding head, and improve the stability of the welding quality.
Patent Information
- Application Number
- CN202420180815.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-25
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-01-25
AI Technical Summary
During the ultrasonic welding of non-woven fabrics, the pressure of the welding head and the bottom roller is too large or too small, resulting in unstable welding quality and prone to welding or welding insolidity.
Use the pressure sensor to collect the feedback pressure value when contacting the bottom roller, and adjust the distance between the welding ting and the bottom roller through the PID CNC system and the servo electric cylinder to keep the pressure constant pressure and achieve automatic pressure regulation.
By maintaining the constant pressure of the welding tank, the stability of the welding quality is improved, and the problems of not firm welding and welding are avoided.
Smart Images
Figure CN222407212U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an ultrasonic welding mechanism for non-woven fabrics, belonging to the technical field of ultrasonic welding equipment for non-woven fabrics. Background Art
[0002] The non-woven fabric ultrasonic welding equipment uses high-frequency vibration waves to transmit to the surface of the non-woven fabric surface layer and the bottom layer. Under pressure, the non-woven fabric surface layer and the bottom layer are rubbed against each other to form a fusion between the molecular layers, thereby welding the non-woven fabric surface layer and the bottom layer together. When ultrasonically welding non-woven fabrics, the pressure when the welding head contacts the bottom roller has a crucial influence on the welding quality.
[0003] When the pressure between the welding head and the bottom roller is too large, the welding head may penetrate the non-woven fabric; when the pressure between the welding head and the bottom roller is too small, the welding may be loose, thus affecting the welding quality.
[0004] Therefore, how to provide an ultrasonic welding mechanism for non-woven fabrics with automatic voltage regulation and stable welding quality is the research purpose of the utility model. Utility Model Content
[0005] In view of the deficiencies of the above-mentioned technologies, the utility model provides an ultrasonic welding mechanism for non-woven fabrics, which collects the feedback pressure value received by the welding head when it contacts the bottom roller through a pressure sensor, and continuously adjusts the gap distance between the welding head and the bottom roller according to the feedback pressure value by a PID numerical control system and a servo electric cylinder, so that the pressure received by the welding head remains at a constant set value, thereby improving the stability of the welding quality.
[0006] In order to solve the existing technical problems, the technical solution adopted by the utility model is:
[0007] An ultrasonic welding mechanism for non-woven fabrics, characterized in that it includes a frame, a sliding seat, an electric cylinder, a servo motor, a pressure sensor, a fixed seat, a transducer and a welding head, the sliding seat is arranged on the inner side of the frame through a slide rail slider, the sliding seat and the frame are correspondingly provided with proximity switch assemblies, the electric cylinder is arranged on the top of the frame, the servo motor is connected to the top of the electric cylinder, the pressure sensor is arranged on the top of the sliding seat and is connected to the electric cylinder through a connecting rod, the fixed seat is arranged on the sliding seat, a metal contact wire is arranged on the fixed seat, the transducer is arranged on the fixed seat, the welding head is arranged at the bottom of the fixed seat and is connected to the transducer through a horn, and the welding head is electrically connected to the metal contact wire.
[0008] Furthermore, a wall panel is fixedly provided at the rear end of the frame.
[0009] Furthermore, the proximity switch assembly includes a first proximity switch and a second proximity switch, wherein the first proximity switch is arranged on the top of the sliding seat, and the second proximity switch is arranged on the frame and is located directly above the first proximity switch.
[0010] Furthermore, the welding head is configured as a conductive metal welding head.
[0011] The beneficial effect of the utility model is that the feedback pressure value received by the welding head when it contacts the bottom roller is collected by the pressure sensor, and the gap distance between the welding head and the bottom roller is continuously adjusted by the PID numerical control system and the servo electric cylinder according to the feedback pressure value, so that the pressure received by the welding head is kept at a constant set value, thereby improving the stability of the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a structural schematic diagram of the utility model.
[0013] Figure 2 It is a local structure of the utility model Figure 1 .
[0014] Figure 3 It is a local structure of the utility model Figure 2 .
[0015] Figure 4 It is a local structure of the utility model Figure 3 .
[0016] Among them: frame 1, sliding seat 2, electric cylinder 3, servo motor 4, pressure sensor 5, fixing seat 6, transducer 7, welding head 8, proximity switch assembly 9, metal contact wire 10, wall panel 11, first proximity switch 901, second proximity switch 902. DETAILED DESCRIPTION
[0017] In order to make those skilled in the art better understand the technical solution of the utility model, the following Figure 1-4 The utility model is further analyzed.
[0018] like Figure 1-4As shown, an ultrasonic welding mechanism for non-woven fabrics is characterized in that it includes a frame 1, a sliding seat 2, an electric cylinder 3, a servo motor 4, a pressure sensor 5, a fixed seat 6, a transducer 7 and a welding head 8. The sliding seat 2 is arranged on the inner side of the frame 1 through a slide rail slider, and proximity switch assemblies 9 are correspondingly provided on the sliding seat 2 and the frame 1. The electric cylinder 3 is arranged on the top of the frame 1, the servo motor 4 is connected to the top of the electric cylinder 3, the pressure sensor 5 is arranged on the top of the sliding seat 2, and is connected to the electric cylinder 3 through a connecting rod, the fixed seat 6 is arranged on the sliding seat 2, and a metal contact wire 10 is provided on the fixed seat 6, the transducer 7 is arranged on the fixed seat 6, the welding head 8 is arranged at the bottom of the fixed seat 6, and is connected to the transducer 7 through a horn, and the welding head 8 is electrically connected to the metal contact wire 10.
[0019] In this embodiment, preferably, a wall panel 11 is fixedly provided at the rear end of the frame 1, and the function of the wall panel 11 is to facilitate the installation of the welding mechanism on the equipment.
[0020] In this embodiment, preferably, the proximity switch assembly 9 includes a first proximity switch 901 and a second proximity switch 902, wherein the first proximity switch 901 is arranged on the top of the sliding seat 2, and the second proximity switch 902 is arranged on the frame 1 and is located directly above the first proximity switch 901, and is used to detect the position of the sliding seat 2, thereby detecting the position of the welding head 8.
[0021] In this embodiment, preferably, the welding head 8 is configured as a conductive metal welding head, so that the metal contact wire 10 can be electrically connected to the welding head 8 and form a closed circuit with the metal bottom roller.
[0022] The specific working principle of the utility model is as follows: the first step is to execute the operation of returning the welding head 8 to the origin, the sliding seat 2 rises, and stops when the first proximity switch 901 contacts the second proximity switch 902. The current position of the sliding seat 2 is the origin position of the welding head 8, and the numerical control system records the origin position; the second step is to execute the operation of the welding head 8 detecting the bottom roller position, the sliding seat 2 descends, and when the welding head 8 contacts the bottom roller, the metal contact line 10 connected to the welding head 8 is electrically connected to the metal contact line connected to the bottom roller to form a circuit loop, and the current position of the absolute encoder of the servo motor 4 (i.e., the bottom roller position) is recorded; the third step is to execute the fixed distance return of the welding head 8 The sliding seat 2 is retreated, and the welding head 8 is raised to a certain distance (set manually at the CNC system end), and the welding head 8 forms a set gap distance with the bottom roller; the fourth step is to start the welding head 8, and the welding head 8 continuously rises and falls to weld the non-woven fabric on the bottom roller. During welding, the pressure sensor 5 collects the feedback pressure value received by the welding head 8, and the PID CNC system and the servo electric cylinder continuously adjust the gap distance between the welding head 8 and the bottom roller according to the feedback pressure value (the set value of the welding head 8 is adjusted to 2 microns each time), so that the pressure received by the welding head 8 remains at a constant set value, thereby improving the stability of the welding quality.
[0023] Specifically, when the pressure on the welding head 8 is greater than the set value (i.e., the gap between the welding head 8 and the bottom roller is too small, and the welding head 8 will heat up and expand due to long-term operation, which will cause this situation to occur), the distance the welding head 8 descends each time is reduced by 2 microns until the pressure on the welding head 8 is equal to the set value; when the pressure on the welding head 8 is less than the set value (i.e., the gap between the welding head 8 and the bottom roller is too large, and the welding head 8 is in indirect contact with the bottom roller due to long-term operation, which will cause a slight downward shift in the position of the bottom roller, thereby causing this situation to occur), the distance the welding head 8 descends each time is increased by 2 microns until the pressure on the welding head 8 is equal to the set value.
[0024] The technical solution provided by the present application is introduced in detail above. The principles and implementation methods of the present application are explained in this article using embodiments. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for general technicians in this field, according to the idea of the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.
Claims
1. An ultrasonic welding mechanism for nonwoven fabrics, characterized in that: It includes a frame, a sliding seat, an electric cylinder, a servo motor, a pressure sensor, a fixed seat, a transducer and a welding head. The sliding seat is arranged on the inner side of the frame through a slide rail slider. The sliding seat and the frame are correspondingly provided with proximity switch components. The electric cylinder is arranged on the top of the frame. The servo motor is connected to the top of the electric cylinder. The pressure sensor is arranged on the top of the sliding seat and is connected to the electric cylinder through a connecting rod. The fixed seat is arranged on the sliding seat. A metal contact wire is arranged on the fixed seat. The transducer is arranged on the fixed seat. The welding head is arranged at the bottom of the fixed seat and is connected to the transducer through a variable amplitude rod. The welding head is electrically connected to the metal contact wire.
2. The ultrasonic welding mechanism for nonwoven fabric according to claim 1, characterized in that: A wall panel is fixedly arranged at the rear end of the frame.
3. The ultrasonic welding mechanism for nonwoven fabric according to claim 1, characterized in that: The proximity switch assembly includes a first proximity switch and a second proximity switch, wherein the first proximity switch is arranged on the top of the sliding seat, and the second proximity switch is arranged on the frame and is located directly above the first proximity switch.
4. The ultrasonic welding mechanism for nonwoven fabric according to claim 1, characterized in that: The welding head is configured as a conductive metal welding head.