The car lumbar support is equipped with a high-frequency device inside

Automotive Lumbar Support Airbag High-Frequency Equipment

Automotive lumbar support airbag high-frequency equipment is an industrial device that utilizes high-frequency electromagnetic fields (27.12 MHz or 40.68 MHz) to polarize molecules of flexible materials such as TPU and PVC, generating frictional heat to achieve simultaneous welding and cutting. Its core functions, technical features, and typical application scenarios are as follows:

I. Core Functions

Simultaneous Welding and Cutting
The equipment uses a high-frequency electric field to excite molecular motion in materials, generating heat. Under mold pressure, it welds two or more layers of materials while automatically trimming excess edges, ensuring smooth and burr-free airbag edges, thereby enhancing product aesthetics and durability.

Multi-Station High-Efficiency Production
Some models (e.g., four-station high-frequency welding machines) support simultaneous multi-mold operations, with a single machine capable of producing up to 3,500 units per 8-hour shift, meeting large-scale production demands.

Wide Material Compatibility
Suitable for welding flexible materials such as TPU, PVC, and EVA. Widely used in the production of airbag inner bags for automotive seat lumbar supports, backrests, and leg rests, as well as expandable to manufacturing inflatable products like U-shaped pillows.

II. Technical Features

High-Frequency Electromagnetic Field Heating
The equipment uses a high-frequency electric field to polarize material molecules, generating heat through dielectric loss to achieve rapid welding. Welding time can be controlled within 0-10 seconds.

Safety Protection Devices

• Spark Suppression System: Automatically cuts off the high-frequency circuit when mold arcing is detected, protecting the mold and products.
• Overload Protection: Automatically cuts off high voltage when current exceeds the limit, safeguarding the oscillation tube and rectifier.
• Current Limiting Protection: Cuts off high-frequency output when the output force is excessively adjusted, preventing damage to the electron tube.

Automation and Customization

• Supports custom processing; mold dimensions and product sizes can be adjusted based on requirements.
• Some models feature a sliding table design, allowing operators to simply place the product and press the sliding table forward button to complete the entire process (welding, rising, and exiting) without specialized training.

III. Typical Application Scenarios

Automotive Seat Massage Systems
Used to produce airbag inner bags for seat lumbar supports, backrests, and leg rests. These bags simulate manual massage through inflation and deflation, alleviating driving fatigue. For example, the six-point massage lumbar support pump-valve integrated universal model uses high-frequency welding to produce inner bags, ensuring airtightness and durability.

Smart Home and Office Applications
Airbag inner bags for high-end office chairs and massage chairs are also produced using this equipment. For instance, multi-layer neck massage airbags are manufactured through high-frequency welding to achieve composite material layering, enhancing massage comfort.

IV. Typical Equipment Parameters and Case Study

Shanghai Puxiong Auto-P05P

• Output Power: 12 KW
• Work Area Dimensions: 400 mm × 500 mm
• Control Method: PLC
• Application: Welding of airbags and lumbar support inner bags
• Features: Supports custom molds, equipped with a pneumatic pressure system (≤0.6 MPa). Equipment dimensions: 1000 mm × 2200 mm × 2280 mm.