Vinyl Window Frame Weld Strength Inspection

Inspection template for verifying fusion weld strength, corner cleanup, and visible quality on welded vinyl window frames to help identify weak welds, poor fusion, and conditions that may contribute to field failures or air leakage.

Inspection Details

• Frame identification recorded
  Record the frame model, size, lot number, and work order or serial number.
• Inspection stage confirmed
  Select where this inspection is being performed in the process flow.
• Inspector name and date recorded
  Enter the inspector name and inspection date/time.
• Reference specification available
  Verify the applicable drawing, work instruction, or acceptance criteria are available at the point of inspection.

Corner Weld Integrity

• All welded corners show full fusion with no visible separation
  Inspect each corner for continuous fusion at the weld line with no open seam, gap, or visible delamination.
• Corner weld bead is uniform and consistent
  Rate the uniformity of the weld bead appearance across all inspected corners.
• No evidence of weak weld, cold weld, or incomplete fusion
  Check for signs of insufficient fusion such as brittle-looking seam, uneven melt, or corner pull-apart risk.
• Corner alignment and squareness within tolerance
  Measure corner squareness or diagonal variance as defined by the product specification.
• Weld flash does not interfere with structural corner area
  Verify excess flash does not mask a defect, prevent proper fit, or indicate poor fusion at the structural corner.

Corner Cleaning and Finish

• Corner cleaning completed without gouges or damage
  Inspect cleaned corners for scratches, gouges, burn marks, or tool damage that could weaken the frame or affect appearance.
• Residual flash removed to specified finish standard
  Verify residual weld flash has been removed to the specified finish standard without exposing defects or thinning the corner.
• Corner surface is clean and free of debris, dust, and loose PVC particles
  Check that the corner area is clean and ready for downstream assembly, glazing, or packaging.

Defects and Non-Conformance

• Cracks, voids, or burn-through present at weld area
  Identify any cracks, voids, burn-through, or other weld discontinuities at the corner.
• Evidence of corner pull-apart or separation under handling
  Check for movement, separation, or visible opening at the corner that suggests inadequate weld strength.

Disposition and Sign-Off

• Inspection result
  Select the overall disposition of the frame after inspection.
• Corrective action documented
  Describe the corrective action, containment step, or disposition for any non-conformance found.
• Inspector signature
  Inspector confirms the findings are accurate and complete.