[ Problem Point ]
I wanted to make the weld bead smaller.
[ ⇒Kaizen Point ]
Heated with a halogen double-sided heater.
Non-contact heating eliminates stringiness and burrs.
Furthermore, because the bonding is done using heat and pressure without using adhesives or solvents, there is no need to worry about impurities leaching from the welded parts.
Related page:
No.8 Preventing stringiness with non-contact heating plate 
No.4 Fusion press fitting of resin parts 
Basic knowledge of Resin heating 3.The kind of resin -2 Thermosetting resin 
No.18 Cooling during film fusion sealing 
Resin heating during heat caulking process 
No.28 Infrared heat caulking of resin boss 
No.7 Torch of the resin weld 
No.13 Heat hardening of resin material