Ultrasonic sealing device for plastic bags
Through the ultrasonic sealing device combined with spring buffering, the problems of high electrical heating energy consumption and easy sealing damage are solved, and high-efficiency and energy-saving plastic bag welding is achieved.
Patent Information
- Application Number
- CN202422174747.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-05
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-09-05
AI Technical Summary
In existing plastic bag welding sealing devices, electric heating energy consumption is high and sealing is prone to local crushing, resulting in unqualified sealing.
The ultrasonic sealing device is adopted, and the ultrasonic transducer and cylinder are combined to achieve bag welding through ultrasonic vibration, and the impact force is buffered through the spring to avoid rigid squeezing.
It improves the pass rate of the seal, reduces energy consumption, avoids damage at the seal, and achieves efficient and energy-saving welding.
Smart Images
Figure CN223174466U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of packaging sealing devices, in particular to an ultrasonic sealing device for plastic bags. Background Technique
[0002] The common sealing of automatic packaging machines is electric heating. Electric heating is one of the most widely used heating methods in packaging machines. It converts electrical energy generated by resistance wires into heat energy to heat the substances in the packaging machine. Electric heating has high flexibility and can precisely control the temperature and heating time. It is suitable for various packaging materials and products. However, the energy consumption of electric heating is relatively high and requires a large amount of electric power resources. The principle of ultrasonic welding mainly involves using high-frequency vibration waves to be transmitted to the surfaces of two objects to be welded. Under pressure, the surfaces of the two objects rub against each other to form a fusion between molecular layers, which has the characteristics of fast welding speed and energy saving. For the welding and sealing of plastic bags, when applying pressure, a cylinder is generally used to push the welding die base, and the rigid impact during pressing is relatively large, and it is easy to cause local crushing at the fusion part, resulting in unqualified sealing. Content of the Utility Model
[0003] The purpose of the utility model is to provide an ultrasonic sealing device for plastic bags to solve the problems raised in the above background technique.
[0004] To achieve the above purpose, the utility model provides the following technical solution: An ultrasonic sealing device for plastic bags, including a support frame, an ultrasonic transducer, and a cylinder. The ultrasonic transducer is horizontally installed on the lower side of the support frame. An ultrasonic probe is installed at the front end of the ultrasonic transducer. The cylinder is arranged opposite to the ultrasonic probe. A welding die base is fixedly installed on the piston rod of the cylinder. The bag mouth is clamped and heated for sealing between the welding die base and the ultrasonic probe. A slide rail along the length direction is fixedly installed on the lower side of the support frame. A slider is slidably connected in the slide rail. A spring is connected between one end of the slider and the end plate of the slide rail. The lower side of the slider is fixedly connected with an L-shaped mounting frame. The tail of the cylinder is fixedly installed with the mounting frame.
[0005] Preferably, two through long holes are provided at the end of the support frame. A flange is provided at the front part of the ultrasonic transducer. Two stud bolts are provided on the upper side of the flange. The stud bolts pass through the long holes and are locked by nuts.
[0006] Preferably, a vertical plate is fixedly connected to the bottom of the support frame. The front part of the ultrasonic transducer passes through the through hole in the middle of the vertical plate.
[0007] Preferably, a guide rod is arranged in the chute of the slide rail. The guide rod passes through the slider and is slidably connected with it. The spring is sleeved on the guide rod.
[0008] Compared with the prior art, the beneficial effects of the utility model are as follows: The ultrasonic sealing machine realizes the transmission of ultrasonic waves through the vibration of the vibration component, focuses the ultrasonic waves at the bag mouth, and when welding and clamping the bag mouth, the air cylinder installed under the slider is buffered by the spring to prevent the fusion part from being damaged due to impact extrusion, thereby improving the qualification rate of sealing. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 is a three-dimensional structural schematic diagram of the utility model;
[0010] Figure 2 is a front view structural schematic diagram of the utility model;
[0011] Figure 3 is an installation schematic diagram of the slide rail and the slider.
[0012] In the figure: 1, support frame; 2, ultrasonic transducer; 3, long slot; 4, ultrasonic probe; 5, air cylinder; 6, slide rail; 7, slider; 8, spring; 9, guide rod; 10, mounting bracket. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0013] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.
[0014] Please refer to Figures 1-3 , the present utility model provides a technical solution: A plastic bag ultrasonic sealing device includes a support frame 1, an ultrasonic transducer 2 and an air cylinder 5. The ultrasonic transducer 2 is horizontally installed on the lower side of the support frame 1. Two through long slots 3 are provided at the end of the support frame 1. A flange is provided at the front of the ultrasonic transducer 2, and two stud bolts are provided on the upper side of the flange. The stud bolts pass through the long slots 3 and are locked by nuts. The horizontal position of the ultrasonic transducer 2 can be finely adjusted through the long slots 3.
[0015] An ultrasonic probe 4 is installed at the front end of the ultrasonic transducer 2. The ultrasonic transducer 2 converts electrical energy into mechanical vibration energy to generate ultrasonic waves and transmits the generated ultrasonic waves to the ultrasonic probe 4. A vertical plate is fixedly connected to the bottom of the support frame 1. The front part of the ultrasonic transducer 2 passes through the through hole in the middle of the vertical plate. The air cylinder 5 is arranged opposite to the ultrasonic probe 4. A welding die holder is fixedly installed on the piston rod of the air cylinder 5. The bag mouth is clamped and heated for sealing between the welding die holder and the ultrasonic probe 4.
[0016] A slide rail 6 along the length direction is fixedly installed on the lower side of the support frame 1. A slider 7 is slidably connected in the slide rail 6. One end of the slider 7 is connected with a spring 8 between the end plate of the slide rail 6. A guide rod 9 is arranged in the chute of the slide rail 6. The guide rod 9 penetrates through the slider 7 and is slidably connected with it. The spring 8 is sleeved on the guide rod 9. An L-shaped mounting bracket 10 is fixedly connected to the lower side of the slider 7. The tail of the air cylinder 5 is fixedly installed with the mounting bracket 10. When the air cylinder 5 pushes the welding die base towards the ultrasonic probe 4, the slider 7 is impacted and moves to compress the spring 8, which can buffer the impact, so that the welding die base is in flexible contact with the ultrasonic probe 4, preventing the fusion part from being damaged due to rigid impact extrusion.
[0017] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An ultrasonic sealing device for plastic bags, comprising a support frame (1), an ultrasonic transducer (2) and a cylinder (5). The ultrasonic transducer (2) is horizontally installed on the lower side of the support frame (1), and is characterized in that: The front end of the ultrasonic transducer (2) is equipped with an ultrasonic probe (4). The cylinder (5) is arranged opposite to the ultrasonic probe (4). A welding die base is fixedly installed on the piston rod of the cylinder (5). The bag mouth is clamped and heat-sealed between the welding die base and the ultrasonic probe (4). A slide rail (6) along the length direction is fixedly installed on the lower side of the support frame (1). A slider (7) is slidably connected in the slide rail (6). A spring (8) is connected between one end of the slider (7) and the end plate of the slide rail (6). The lower side of the slider (7) is fixedly connected with an L-shaped mounting bracket (10). The tail of the cylinder (5) is fixedly installed with the mounting bracket (10).
2. The ultrasonic sealing device for plastic bags according to claim 1, wherein: Two through long slots (3) are provided at the end of the support frame (1). The front part of the ultrasonic transducer (2) is provided with a flange. Two stud bolts are provided on the upper side of the flange. The stud bolts pass through the long slots (3) and are locked by nuts.
3. The ultrasonic sealing device for plastic bags according to claim 1, characterized in that: A vertical plate is fixedly connected to the bottom of the support frame (1). The front part of the ultrasonic transducer (2) passes through the central through hole of the vertical plate.
4. The ultrasonic sealing device for plastic bags according to claim 1, characterized in that: A guide rod (9) is arranged in the chute of the slide rail (6). The guide rod (9) passes through the slider (7) and is slidably connected with it. The spring (8) is sleeved on the guide rod (9).