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As China Negative-Pressure Drainage Bag Welding Equipment Manufacturers and Negative-Pressure Drainage Bag Welding Equipment Suppliers, Kunshan Shifuda Automation Technology Co., Ltd. (Anhui Shifuda Automation Technology Co., Ltd.) is a modern enterprise integrating R&D, manufacturing, sales, and technical services. It is a relatively competitive equipment supplier in the domestic automation field.
1.Professional R&D, production, sales, ultrasonic plastic welding machines, non-standard automation, hot melt machines, testing equipment, automated assembly, tooling fixtures, molds and other machinery and equipment.
2.Our company mainly targets the plastic welding automation industry. The processes are as follows (ultrasonic welding process, hot melt process, hot plate process, hot riveting process, high frequency welding process, high frequency welding process, eddy current process, etc.)
3.Our company also has a lot of R&D equipment in the water treatment industry, including DTRO diaphragm welding, MBR flat membrane welding, and tubular membrane welding.
4.Logistics industry, (post-processing equipment for hoarding boxes, hollow panels, post-processing equipment for turnover boxes)
5.Medical industry, (blood collection needles, cover pockets, negative pressure drainage bags, peripheral blood collection needles, infusion tubes, scalp needles, retention needles, heparin caps, etc., multiple automated assembly and welding equipment)
Our company has in-depth research in the automotive field, logistics field, medical field, toys, electronics and other fields.
The company's main service industries: automotive, medical, environmental protection, cosmetics, electronics, etc. The core technical capabilities include automated welding equipment, post-processing of hollow board enclosures, post-processing equipment for automobile enclosures, and non-standard automation equipment for medical device products. Design and manufacturing, specializing in providing welding equipment for medical device products, making significant contributions to the industry. We have multiple patents on ultrafiltration, MBR flat membrane, DTRO membrane and other water treatment equipment.
We have established a complete customer service system and have a well-trained and skilled technical service team to serve customers, including R&D and pre-manufacturing technical solution customization, equipment installation and commissioning, technical training and 24-hour after-sales technology Support Services.
Negative-pressure drainage bags are single-use medical devices used after surgery to collect body fluids while maintaining a localized vacuum, and the core quality metric is the seal strength and vacuum-holding capability of the bag's edge weld. This machine uses high-frequency or ultrasonic heat-sealing to weld the film edges continuously, producing a uniform seal line with no cold spots, so the bag can hold negative pressure over extended use without leaking air or fluid.
Because drainage bags are typically made from soft PVC or PE film, the material tends to wrinkle or shift out of alignment during welding. The machine includes tension control and alignment fixtures that flatten and precisely position the film before sealing, reducing weld defects caused by the film's inherent softness. Sealing-head pressure and temperature can be adjusted for different film thicknesses, accommodating drainage bags of various sizes.
The machine supports continuous feeding and automatic trimming, combining bag-forming, sealing, and edge-cutting into a single production line. Compared with a traditional step-by-step process, this reduces the number of times semi-finished bags are moved between stations and lowers the contamination risk that repeated handling can introduce. The finished bags come out flat with a clean, clearly defined seal line, which makes downstream printing and packaging steps easier to carry out.
For manufacturers producing negative-pressure drainage bags, ostomy bags, and similar soft-bag medical consumables, this equipment improves weld consistency and production efficiency, and is an important production step for ensuring the product's safety and reliability in clinical use.
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