| 摘要 |
A method of welding plastics profiles together to form joints, eg., corner joints of door and window frames, comprises preparing the ends of the profiles for welding by cutting back a section 5 of the profile 1 so that it lies below the remaining section 6. During heating, only section 6 is melted and the parts are brought together so that the unmelted sections 5 simply butt up to one another, or only merge to a very small extent, thus giving the appearance, when looked at towards the surface 2, of a non-welded butt joint, ie., the formation of a burr on the surface 2 is avoided. The ends of the profiles 1 may be cut with a continuous shallow slope (Figure 5) so that section (8) lies forward of the remainder of the profile. When a profile cut in this way is pushed together with another similar profile in order to make a butt joint, the two sections (8) would meet first, and thus it is these areas which are melted in order to effect the welded joint. |
