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Find answers about high frequency welding machines — working principles, materials, voltage, certifications, custom molds, shipping, and after-sales support.
High Frequency Welding Machines
A: High frequency welding machines utilize high frequency electromagnetic fields (typically 27.12 MHz or 40.68 MHz) to generate frictional heat in the molecules of polar materials such as PVC and TPU, and then fuse them under pressure. This process is suitable for sealing, welding or embossing, without the need for glue or stitching, achieving high-strength bonding.
A: High frequency welding machines are specially designed for thermoplastic materials such as PVC, PU, TPET, and EVA, and can also handle coated fabrics and inflatable products. If you have special material requirements, please provide samples and we will test the compatibility for you.
A: Yes. Our machines have passed CE and ISO certifications, hold 23 patents, and comply with FCC electromagnetic interference limits, ensuring safe use in regions such as the European Union and North America. Each device comes with a compliance certificate.
A: Our standard high frequency welding machine operates at 380V 50Hz. If the power supply voltage in your country differs, we can customize the voltage configuration. For example, we support three-phase 480V 60Hz (USA), three-phase 220V 60Hz (Mexico), and other regional specifications.
A: Yes. Our factory has its own high frequency mold production department, providing customized molds made of aluminum alloy or copper. Please provide your product design drawing or sample, and we will design and manufacture the matching high frequency mold for you.
A: We offer a 12-month warranty for high frequency welding machines (excluding damage caused by improper use). Technical support is available within 24 hours via email, WhatsApp, or WeChat. We also provide long-term free video after-sales service and troubleshooting guides.
A: Standard high frequency welding machines are in stock and ready to ship. Lead time for customized machines depends on specifications. We package in wooden crates and ship by sea (EXW / FOB / CIF / DDP terms available). Express air freight can also be arranged upon request.
A: Pressing TPU with a high frequency welding machine requires the appropriate high frequency mold. Contact us to discuss mold production. Our factory provides free technical guidance on TPU pressing procedures and parameter settings.
A: Common causes of sparking: 1. High frequency output is set too high. 2. The mold is not level. 3. The material is conductive or contaminated. 4. No high-sensitivity arc protection device is installed. 5. No insulating material is placed on the pad.
Solutions: 1. Reduce the high frequency output. 2. Level or replace the mold. 3. Replace materials and keep them clean. 4. Install an arc protection device. 5. Place insulating material on the welding pad.
If the above steps do not resolve the issue, please email Lina@fszhenjia.com for further consultation.
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After-Sales Support
A: We offer 12 months warranty, on-site installation & training, and lifetime technical support. Our service network covers major industrial regions across China.
A: For customers in China, our local service partners provide door-to-door repair within 48–72 hours (depending on location). Overseas customers receive remote troubleshooting guidance, and engineers can be dispatched for critical cases.
A: Yes. We provide free on-site training covering machine operation, mold adjustment, basic maintenance, and safety procedures for your production team.
A: Spare parts can be ordered directly through our sales team. We keep common components in stock and ensure fast delivery via express couriers worldwide.
A: Yes. Our mold workshop offers mold refurbishment, surface polishing, and design modifications to extend tooling life and adapt to product changes.
A: We provide emergency support via WhatsApp / WeChat for urgent issues. Standard technical inquiries are replied to within 24 hours.
A: Yes. Each machine comes with a detailed English manual, circuit diagrams, and video tutorials for daily checks and troubleshooting.
A: Custom molds carry a 6-month warranty against manufacturing defects. Proper use and maintenance guidelines are provided to ensure longevity.
A: Yes. We offer retrofit services such as PLC upgrades, new oscillator installation, and safety enhancements to extend your equipment’s service life.
A: Contact your nearest service office to arrange annual or bi-annual maintenance visits. We also offer remote monitoring guidance to help you track machine health.
Shipping & Delivery
A: All machines are packed in reinforced wooden crates with foam padding and moisture-proof lining to ensure safe transit. Each crate is marked with handling instructions in English.
A: We support EXW, FOB, CIF, and DDP trade terms. Sea freight is standard for large machines. Air express is available for small parts or urgent orders. Please contact us for a freight quote.
A: Transit time depends on the destination. Typical estimates: Southeast Asia 5–10 days, Middle East 15–20 days, Europe 25–35 days, Americas 30–45 days. These are approximate and may vary by port and carrier.
A: Standard in-stock machines are dispatched within 3–5 business days after full payment confirmation. For customized machines, lead time will be confirmed at the time of order.
A: Yes. Upon shipment we provide a full set of export documents including: commercial invoice, packing list, bill of lading, CE certificate, and any other documents required for customs clearance in your country.
A: Please photograph any visible damage on the crate or machine upon receipt and notify us within 48 hours. We will coordinate with the freight insurer and arrange replacement parts or repairs as quickly as possible.
