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This yellow closure clip is a single-patient disposable for laparoscopic surgery. Loaded into a ligation forcep, it reaches a vessel or tissue bundle through a trocar, closes across it, and locks. After the operation it is discarded with the cartridge. It never gets reused, so every clip in the box has to behave like every other clip.
The clip is injection molded from medical-grade polymer as one piece: an arch that carries the clamping load, a row of locking ridges on the closure face, and a base with feet that seat the clip in the forcep jaw.
The closure face is where the clip earns its keep. A row of matching ridges runs down each side of the arch; when the clip closes, the ridges nest between each other and hold the collapsed position. The clamping force is not muscle, it is geometry — the arch is a curved beam, the material is chosen so the beam can close fully without yielding, and the ridges keep it closed once it gets there. If the ridge pitch drifts even slightly from cavity to cavity, some clips lock softly and some refuse to open in the forcep. Both are rejects.
A clip that grips because the resin is soft will relax in tissue. A clip that grips because the arch passes through its designed travel will hold until it is cut away. The arch wall thickness sets that travel, so it is held to a tight section on both sides of the part. The channel under the arch lets the vessel bundle seat before the ridges engage, and the feet at the base locate the clip in the forcep so the applier closes it at the designed point rather than wherever it happens to sit.
Clips run in multi-cavity molds, and cavity-to-cavity consistency is the whole game. A multi-cavity tool is a dozen chances for one cavity to run heavy, flash a ridge or pull the arch out of plane, and one bad cavity quietly contaminates thousands of units. We map each cavity by shot weight and first-article measurement, and check ridge engagement on a fixture rather than by feel.
Flash deserves its own sentence. A whisker of flash inside the closure channel can stop the ridges from seating. The tool shut-offs around the closure face are hardened and inspected on a schedule, because flash there is invisible until the clip fails to lock.
The yellow color is functional: it makes the clip easy to see against tissue on the monitor. The resin is a medical-grade polymer chosen for stiffness, low friction and compatibility with sterilization; acetal is the usual candidate for a clip of this style, and the exact grade and colorant follow the customer’s specification. Molding runs with the material sealed and dried, and parts are packed without post-molding handling that could introduce particles.
One constraint worth stating plainly. We do not claim certifications on the customer’s behalf; if the device program requires a specific grade or documentation package, that requirement belongs in the project brief so the material and process are qualified from the start.
Kunshan Maifeng Precision Industry Co., Ltd. reviews closure clip designs before quoting, builds the injection molds in house, and molds single-color and dual-color parts on 36 machines from 90 to 700 tons. Send us the forcep interface drawing and the resin specification, and we will come back with a feasibility comment and a tooling proposal.
Kunshan Maifeng Precision Industry Co., Ltd. (MIF) has an investment of RMB 35 million and an independent factory of more than 5,000 m². The company operates 36 single- and dual-color injection molding machines from 90 to 700 tons, together with more than 50 sets of mold manufacturing and processing equipment. Our service, management and production team includes over 100 people.
Our parent company was established in 2008. We provide product design, mold design and manufacturing, injection molding and product assembly services for custom plastic parts, supporting both domestic and international customers.
1. Product Design
Product structure design and optimization based on customer drawings and samples.
2. Mold Design
Mold design developed around product geometry, material and production requirements.
3. Mold Manufacturing
Machining, polishing, fitting and assembly for custom injection molds.
4. Injection Molding
Single- and dual-color injection molding for project and order requirements.
5. Product Assembly
Supporting assembly services for molded plastic components.
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