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The skin prick needle is the part that touches the patient. In an allergen test, the array is pressed against the skin through a drop of extract, the tips make a set of uniform superficial pricks, and the reactions are read about twenty minutes later. This needle is a disposable white polymer array — no steel, no sharpening step, one patient and one test, then into the waste stream.
The array is injection molded as a single piece: a row of lancet stems standing from a common spine, each stem ending in a moulded prong tip. Arrays are supplied in a blue storage box with a transparent lid, seated in a white tray, so an operator can lift one array out without touching the tips. This page covers the tip geometry, the array consistency and how the part is molded in volume.
Conventional prick needles are ground steel lancets. This product moulds the point instead. A moulded tip cannot be resharpened, so the geometry has to do the work: each stem ends in a small prong with a shoulder below it, and the shoulder is what limits how far the tip can travel into skin. The tip pricks; the shoulder stops. That is the safety concept in one sentence, and it only holds if every tip in the array ends at the same height.
The resin is a medical-grade white polymer chosen for stiffness at the tip section. A tip that flexes under finger pressure gives uneven prick depths across the array, and uneven depths show up later as inconsistent wheal readings — the exact error the test is trying to avoid.
The stems stand at a fixed pitch along the spine. The pitch is not cosmetic: a prick test compares reactions between sites on the forearm or back, and the sites are recorded against a template. If the array pitch drifts, the recorded site and the actual prick stop matching. Pitch is therefore a controlled dimension on the drawing, checked on first articles with a measuring microscope rather than assumed from the tool.
Tip height matters just as much. One stem sitting a tenth low pricks shallowly or not at all, and the operator has no way to see it. Height uniformity across the array is the single most reject-generating dimension on this part, which is why it gets its own inspection step.
A prong tip is a small, sharp feature on a part that otherwise wants generous radii. The tool cores each tip, keeps the parting line away from the tip zone, and gates the part so the flow reaches every stem evenly — a short shot or a disturbed tip on one stem is invisible until the array fails in use. Ejection pushes on the spine and tray-facing surfaces, never on the stems.
Because this is a single-use medical consumable, it runs in multi-cavity tooling, and cavity-to-cavity consistency is the whole game. Each cavity is mapped by shot weight and first-article measurement, and tip inspection runs under magnification on a sampling plan. A whisker of flash at a tip or on the spine edge gets caught there, not by the nurse.
The blue box with the transparent lid is part of the product concept rather than an afterthought. Arrays sit in the white tray in rows; the lid lets a nurse count stock and pick one array without opening the box, which keeps fingers off the tips. The box is a handling and stock-control container. It is not a sterilization barrier, and we are careful not to imply otherwise — any sterilization or terminal packaging requirement belongs to the customer’s process and has to be specified before the packaging design is settled.
Kunshan Maifeng Precision Industry Co., Ltd. reviews single-use medical array 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 array drawing and the tip 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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