Nullam dignissim, ante scelerisque the is euismod fermentum odio sem semper the is erat, a feugiat leo urna eget eros. Duis Aenean a imperdiet risus.
The handle of a surgical instrument carries everything that matters: the trigger mechanism, the wiring path or the fluid path, the grip surfaces and the two halves that close around all of it. The housings shown here are the upper and lower shell halves of a handle for ultrasonic tissue-cutting and hemostasis equipment, moulded in a light medical-grade resin as a matched pair.
The photographs show the outer faces and the inner face of one shell. The outside is smooth and simple, because a handle is held and cleaned. The inside is where the work is: ribs, clip posts, screw bosses and guides that carry the mechanism and hold the two halves in exact register along the length of the grip.
Splitting a handle down its length is the standard answer to a mechanism that has to be assembled inside it. The split line runs along the grip, and everything on the inside, ribs, guides, bosses, is placed so the two halves clamp the mechanism rather than pinch it. The halves locate on each other with moulded posts and matching holes along the seam, so alignment does not depend on the screws alone.
Register matters more here than in a consumer handle. The trigger and the working element at the front of the instrument are aligned through these housings, and a fraction of a millimetre of mismatch between the halves shows up as a mechanism that binds or a control that feels loose at the tip.
The inner face shows a dense structure of ribs and screw bosses. Each has a job: ribs give the thin shell its stiffness so the handle does not creak under grip load, bosses take the assembly screws in compression, and the guides position the mechanism parts during assembly rather than leaving alignment to the technician’s hands.
The constraints on this network are the classic ones for a two-shell part. Ribs are held to a fraction of the wall thickness so they do not sink the outer face, which is the surface the surgeon actually holds. Bosses get core pins and controlled depth so the screw bottoms without splitting the boss. And where ribs cross the seam, they are paired with the mating half so the joint closes flush rather than propping itself open.
The resin is specified for the sterilization and cleaning path the instrument follows, and that choice is made with the customer rather than assumed: different sterilization methods are hard on different resins, and a housing that survives one cycle type may craze under another. Surface finish on the visible faces is kept consistent because a handle is inspected as much as it is used.
Moulding itself is conventional; the discipline is in repeatability. Boss positions, rib depths and seam geometry repeat from the tool shot to shot, which is what lets the same assembly fixtures and the same screws work across every lot.
Screw boss integrity, sampled under load with the actual screws. Seam flushness when the halves are assembled, checked by feel and by measuring the witness line. Rib and guide positions against the mechanism drawing, verified with the real mechanism parts where the customer supplies them. Colour and surface finish against the approved master.
Kunshan Maifeng Precision Industry Co., Ltd. reviews medical instrument housing 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 mechanism layout 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.
English 
Chinese