Umbrella metal part
Stretcher
Overview
- Made by
- Supply chain / partners
- Materials
- Carbon steel strip (U-channel), Aluminium, Fibreglass (FRP)
- Finish options
- Black electrophoresis, Zinc / nickel plating, Powder coating
Manufacturing process & quality control points
- 1
Blanking
Supply chain / partnersShort blanks are cut from the same strip stock as the ribs so material and finish match across the frame.
Quality control points
- Length · Limit gauge · First article + hourly
- 2
Profile forming
Supply chain / partnersStretchers are pressed into U-channel profile in a dedicated die; symmetric profile keeps the canopy from twisting.
Quality control points
- Profile symmetry · Template against master sample · First article + hourly
- 3
Rivet hole punching
Supply chain / partnersTwo rivet holes, one for the runner and one for the rib, are punched in a single stroke so the pitch is fixed by the die.
Quality control points
- Hole pitch · Go / no-go gauge · First article + hourly
- Burr · Visual · 100%
- 4
Surface finishing
Supply chain / partnersFinished together with the ribs so colour and corrosion performance are consistent after assembly.
Quality control points
- Coating thickness · Thickness gauge · 5 pcs per batch
- 5
Fit check
Supply chain / partnersDry-fitted with the runner and rib to confirm free rotation at both joints.
Quality control points
- Joint freedom · Manual swing at both ends, no bind · 100%
Used in
Relevant compliance
- EU REACH (SVHC)
EU
All metal & plastic parts, electroplated components and fabric coatings
- California Proposition 65
US
All products sold into California containing listed chemicals
Get a quote for Stretcher
Custom materials, finishes and logos available. Send your drawing or sample.