(1) Punch holes with a hand drill.
(2) punch holes with a special machine
Methods for judging the quality of aluminum alloy materials and finished products;
(1) identification
Regular or licensed manufacturers of aluminum alloy doors include American doors and windows, Fu Xuan doors and windows, Angel doors and windows, Paiya doors and windows, Red Oak doors and windows, Tiandong doors and windows, Xinhaoxuan doors and windows, Mercer doors and windows, Senying doors and windows, and ocean giants. The obvious parts of its aluminum alloy products are marked with product marks, including: manufacturer's name or trademark, product name, product model or mark, manufacturing date or serial number. There should be obvious words and signs such as "moistureproof", "handle with care" and "upward" on the packing box.
(2) Surface quality
The surface quality of aluminum alloy doors and windows directly affects the decorative effect of the whole wall after installation. Check the surface quality of doors and windows should pay attention to the following aspects:
1. There should be no obvious damage to the decorative surface of doors and windows, that is to say, there should be no scratches on the protective film on the surface of doors and windows.
2. There should be no obvious color difference on the color surfaces of adjacent components on doors and windows.
3. There should be no aluminium scrap, burr, oil stain or other stains on the surfaces of doors and windows, and there should be no overflowing adhesive at the assembly joints.