30mm vs 40mm Silicone Pressure Rollers for Plastic Welding
Choosing a plastic welding roller: how the 30 mm and 40 mm silicone pressure rollers compare, when each working width suits the job, and how to roll a hot air overlap seam that holds.
20mm vs 40mm vs 50mm Wide Slot Nozzles: Which One Fits Your Job?
A wide slot nozzle decides how wide a heated band you lay down. Compare the three sizes we stock - 20 x 2 mm, 40 x 2 mm and 50 x 3 mm - by connection, band width and best-fit application.
4mm vs 5mm Weldy Speed Welding Nozzles
Rough, porous or under-filled HDPE/PP joints are rarely the gun's fault — they usually come from a speed welding nozzle that does not match the rod diameter. Weldy speed welding nozzles are sized t...
Plastic Welding Nozzle Guide: Speed vs Wide Slot vs Tubular Nozzles
Every hot-air hand weld starts with the same decision: which plastic welding nozzle goes on the gun. The nozzle shapes the air stream, the heat pattern and the joint geometry, so swapping it is the...
Extrusion Welding Thick HDPE & PP: Single-Pass vs Multi-Layer Welds
When fabricators weld thick HDPE or PP sheet, one of the first questions is whether the joint needs one pass or several. The common assumption is that heavy sections always demand multiple layers. ...
Weldy Energy Kit Selection Guide: HT1600, HT1600D & HT3400
You already know you need a manual hot air gun for patches, overlaps and rod welds. The harder question is which Weldy Energy set to order: Weldy sells the HT1600, HT1600D and HT3400 in factory kit...
