Aluminum profile door and window quality identification: Start with the material used
Identifying the quality of aluminum profile doors and windows, there are mainly 6 aspects to consider in terms of material and material selection:
1. Thickness: Aluminum sliding doors come in 70 series and 90 series. For residential interiors, the 70 series is sufficient. The series number indicates the millimeter size of the door frame thickness construction. Aluminum sliding windows are available in 55, 60, 70, and 90 series. The series choice should be based on the window opening size and local wind pressure values. Aluminum sliding windows used for封闭阳台 should be no less than the 70 series.
2. Strength: Tensile strength should reach 157 Newtons per square millimeter, yield strength
To achieve 108 Newtons per square millimeter. When selecting, gently bend the profile material with your hand; upon releasing, it should return to its original shape.
3. Color Consistency: The color of the aluminum alloy profiles should be uniform; if there is a significant color difference, it is not advisable to purchase.
4. Flatness: The surface of the aluminum alloy profiles should be free of dents or bulges.
5. Glossiness: Avoid selecting profiles with surface defects such as open bubbles (white spots), slag (black spots), cracks, burrs, and peeling.
6. Oxidation Degree: The thickness of the oxide film should reach 10 micrometers. When purchasing, gently scratch the surface of the profile to check if the oxide film can be wiped off.
Wuhan Tingting Materials Recycling Co., Ltd. has been extensively purchasing used residential and commercial air conditioners, transformers, voltage regulators, motors, computers, refrigeration equipment, Jianghan waste aluminum alloy, cables, batteries, production lines, machine tools, lathes, washing beds, waste aluminum alloy recycling companies, stamping machines, mixers, press machines, electrical equipment, and various idle and surplus production resources.
Air Conditioning Refrigeration Equipment: Recycling residential and commercial central air conditioners, 1-10HP split units, wall-mounted units, and window-type units, etc. Brands include: Chunlan, Aucma, Sharp, Haier, Hitachi, and more. Various refrigeration equipment such as refrigerators, freezers, display freezers, refrigerators, refrigerated/freezer units, and cold storage facilities.
Scrap Metals: Waste wires and cables, phosphor copper, red copper, bronze, brass, enameled copper wire, copper chips, aluminum alloys, stainless steel lead, etc.
The purpose of smelting recycled aluminum
The fundamental duty in metal alloy melting is to introduce a certain proportion of metal charge into the furnace, heat and melt it to obtain a melt, then adjust the composition of the melted material to obtain alloy liquid that meets the requirements. During the melting process, appropriate measures are taken to control the content of gases and oxidizing impurities, ensuring the alloy (including the content of key components or impurity elements) meets the specifications, and guaranteeing castings achieve an appropriate structure (grain refinement) and high-quality alloy liquid.
Purpose of Alloying Recycled Aluminum
Due to the characteristics of the aluminum element, aluminum alloys tend to have a strong tendency to form pores. The recycling price of scrap aluminum alloys is also affected, as they are prone to oxidation contamination. Therefore, avoiding and removing gases and oxidation contaminants becomes a prominent issue in the aluminum alloy melting process. To obtain high-quality aluminum alloy melt, strict control over the melting process is necessary, and measures must be taken to regulate it from all aspects.
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