| 摘要 |
The window or glazed external door frame incorporates shanks made up from a shaped-section batten, with a hollow-chamfered profiled bar assembled from a number of core battens and an encasing plastic sheath, part at least of the cores being of wood. Each of the core battens (18a-d, 20a-d) comprises several wooden layers glued. Together. The plastic sheath (18f, 20g) extruded onto the profiled bar, has sealing lips (28, 40) formed on, to serve as spaces for fittings. The external surface of the shaped-section batten (18, 20) is made up by a layer of aeryl resin (18g, 20g). The frames shanks are mitre-cut, and interconnected by fitting angle pieces engaging in the hollow chambers, and by eccentric bolts engaging in holes at the shank ends and in both arms of the angle pieces, pressing the mitre-cut corners together. This is inexpensive, torsion-resistant and durable. |
