Umbrella plastic part
Top Notch (Top Hub)
Overview
- Made by
- Qinxi in-house
- Materials
- POM, PA66 + glass fibre, Zinc alloy (die cast, premium)
- Finish options
- Natural (POM / PA), Black electrophoresis (zinc), Plated finish (zinc), Powder coating
Manufacturing process & quality control points
- 1
Injection mould (or die casting die for zinc) is designed around the rib count and rib profile. Slot pitch decides the canopy geometry, so it is frozen before tooling.
Quality control points
- Slot pitch & rib seat geometry · CMM / gauge on first-off samples · First article
- Mould trial capability · Short-shot and full-shot run, fill and ejection check · First article
- 2
POM or PA66+GF is injected; zinc versions are die cast. Both routes are available depending on strength and price targets.
Quality control points
- Dimension · Caliper / gauge per drawing · First article + 1 pc per 2 h
- Short shot / flash / sink marks · Visual · 100%
- 3
Deflashing & cleaning
Supply chain / partnersGates and flash are removed. Flash inside a rib slot will stop a rib seating properly and cause canopy asymmetry.
Quality control points
- Flash in slots · Visual + dry fit with a rib · 100%
- 4
Rivet joint strength check
Supply chain / partnersSample hubs are riveted to ribs and pulled or cycled to confirm the joint does not loosen.
Quality control points
- Joint pull / cycle strength · Pull or open-close cycling to agreed spec (no rivet loosening, deformation) · 5 pcs per batch
Used in
Relevant compliance
- EU REACH (SVHC)
EU
All metal & plastic parts, electroplated components and fabric coatings
- PAHs (polycyclic aromatic hydrocarbons)
EU
Plastic grips, rubber/elastomer coatings and dyed printed fabric in prolonged skin contact
- California Proposition 65
US
All products sold into California containing listed chemicals
Get a quote for Top Notch (Top Hub)
Custom materials, finishes and logos available. Send your drawing or sample.