Diagnostic Consumables
Reaction Cup
Molded reaction cups for automated analysers, where the optical path runs through the wall and a thickness variation reads as a result error.
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Diagnostic Consumables
Centrifuge Tubes
Molded centrifuge tubes and closures for sample preparation, where the part has to hold its shape under spin load and still seal afterwards.
Product Overview
What This Component Is
Molded centrifuge tubes and closures for sample preparation, where the part has to hold its shape under spin load and still seal afterwards. Wall section and base geometry decide whether it does.
Key Benefits
- Base geometry designed for spin load rather than copied from a bottle
- Closure and tube toleranced against each other in one tool shop
- Molded in the clean room for direct sample contact
Molded on tooling we cut ourselves in Shenzhen. Certification covers the site doing the work: ISO 9001:2015 and ISO 13485:2016.
Who It Is For
- Laboratory consumable brands
- Sample preparation kit assemblers
- IVD instrument makers
Problems It Solves
- Tubes that deform or crack under spin load
- Caps that release during centrifugation
- Conical bases that do not let the pellet settle predictably
Application Scenarios
- Sample preparation before analysis
- Plasma and serum separation workflows
- Sample aliquoting and storage
Technical Features
How It Is Engineered
- Even wall section through the cone so it does not thin at the tip
- Closure retention checked with the tube, not on a test rig
- Cavity layout chosen so the base detail fills completely
Materials
- Medical grade resin selected against your specification rather than substituted by us
- Customer nominated grades accepted where a device master record already fixes the material
- Colourants and additives confirmed in writing before the first sampling run
Specifications
Documented Figures
| Part Family | Tubes and matched closures |
|---|---|
| Process | Injection molding on in house built tooling |
| Mold Machining Accuracy | 0.002-0.005 mm on ground surfaces |
| Molding Environment | ISO 8 clean room or conventional workshop |
| Quality System | ISO 9001:2015 and ISO 13485:2016 |
| Country Of Manufacture | Shenzhen, China |
Figures above are plant and tooling capabilities recorded on our own site. Part level tolerances are confirmed against your drawing at mold flow review rather than quoted as a blanket number.
Manufacturing Process
- Mold design review
- Steel machining and EDM
- Mold trial and cavity sampling
- Clean room or conventional molding
- In process dimensional check
- Clean room packing
Quality Control
- Cavity by cavity dimensional sampling before a tool is released
- In process checks during the molding run rather than only at the end
- ERP system records the lot, tool and machine behind every shipment
Customization Options
- Cavitation sized to your annual forecast instead of a fixed standard tool
- Colour and resin grade to your specification
- Clean room packing format and labelling agreed before the first shipment
Comparison
Compared With Other Routes
| Repurposed general purpose tubes | A tube designed for storage is not designed for spin load. Tooling the part around the actual rotor and speed avoids a failure that always shows up late. |
|---|---|
| Splitting tube and cap suppliers | Retention under spin is a property of the pair. One supplier can tune it; two can only argue about it. |
Use Guide
How To Handle It
- Qualify at the maximum rotor speed you will ever use, not the typical one
- Check cap retention after temperature conditioning
- Keep tubes upright and bagged before use
Questions Buyers Ask
Questions About Centrifuge Tubes
Can you design the tube around our rotor?
Send the rotor and the speed with your part data. Base geometry and wall section are chosen against them rather than against a generic tube.
Do you mold the closure too?
Yes. Retention under spin depends on the pair, so we prefer to hold both cavities.
Which resin should we use?
That is your specification and your validation. We mold the grade you nominate and do not substitute it.
Internal Links
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View Component →Quote This Component
Send the drawing, the annual volume and the resin your device file specifies. You will get a feasibility review rather than a price with conditions buried in it.