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Difference between "C" slot and "U" slot in aluminum alloy doors and windows

Difference between "C" slot and "U" slot in aluminum alloy doors and windows

  • Categories:Industry News
  • Author:
  • Origin:中国铝业网
  • Time of issue:2017-12-08
  • Views:

(Summary description)At present, there are U-shaped and C-shaped metal notches on Chinese aluminum alloy door and window profiles. The use of aluminum alloy doors and windows originates from

Difference between "C" slot and "U" slot in aluminum alloy doors and windows

(Summary description)At present, there are U-shaped and C-shaped metal notches on Chinese aluminum alloy door and window profiles. The use of aluminum alloy doors and windows originates from

  • Categories:Industry News
  • Author:
  • Origin:中国铝业网
  • Time of issue:2017-12-08 02:20
  • Views:
Information

At present, there are U-shaped and C-shaped metal notches on Chinese aluminum alloy door and window profiles. The use of aluminum alloy doors and windows originates from the introduction of European aluminum alloy door and window systems. In European aluminum alloy door and window systems, there are only European standard notches. A kind of aluminum alloy special hardware slot, that is now the so-called "C" slot in the Chinese market; U-type hardware slot is a standard slot for plastic steel doors and windows, due to the special requirements of the material and structure of aluminum alloy door and window hardware, aluminum alloy door and window hardware The price is high, while the price of plastic steel door and window hardware is about 40% lower than that of aluminum alloy door and window hardware, so there are aluminum alloy profiles manufacturers will transplant the hardware slot of steel doors and windows to the aluminum alloy door and window profiles also appeared aluminum alloy doors and windows. U" type notch.

The reasons why 3X Europe's aluminum alloy door and window systems do not use U-shaped notches include the following:

1. Hardware design principle of U-shaped notch: U-shaped notch (hardware) is a special metal notch for plastic doors and windows and wooden doors and windows in Europe, and the U-notch hardware connection is installed by self-tapping screws. Hardware. However, if it is applied to aluminum alloy doors and windows, when the self-tapping screws installed in the U-channel hardware carry the longitudinal shear force generated by the door and window switch, the hardness of the self-tapping screws is much larger than that of the aluminum alloy profiles, and the self-tapping screws The buckle will cause damage to the aluminum alloy profile, causing the mounting hole to expand. For a long time, the screw connection of the hardware will cause a trip. Since the steel-lined doors and windows are made of steel, the hardness of the material and the self-tapping screws are equivalent to the expansion of the mounting holes and the phenomenon of hardware tripping. Because the U-shaped notch (hardware) applied to aluminum alloy doors and windows does not meet the mechanical design principles of mechanical design, due to the safety considerations of door and window hardware, European aluminum alloy doors and windows are not U-shaped notches (Hardware) .

2. Hardware of U-shaped notch causes corrosion of aluminum alloy doors and windows. The material of the U-shaped notch hardware is steel. When the hardware is connected to the aluminum profile by a steel self-tapping screw, it will occur when it is eroded by rain and moist air. The more obvious chemical reaction (as the so-called naphtha phenomenon) affects the use of doors and windows and destroys the waterproof structure of doors and windows.

3. The advanced design principle of C-slot hardware: The C-slot hardware installation is based on the stainless steel nail top tightness and the machine screw stainless steel lining and hardware notch clamping force to ensure the firmness of the installation of hardware, stainless steel nail tight A local deformation of about 0.5 to 1.0 mm will occur on the surface of the profile so that the stainless steel nail and the aluminum profile are tightly combined to ensure that the hardware will not be displaced when subjected to force.

4. C-shaped notch hardware is easy to install: it does not need to use mounting holes, does not use self-tapping screws, and is easy to install. It has low dependence on the auxiliary conditions of equipment (electricity and gas) and can be installed on site.

5, material contrast: C-type notch hardware is a special aluminum alloy (metal) door and window hardware, and U-notch hardware from plastic doors and windows, from the material requirements to hardware rod hardness requirements are lower than the C-slot Port hardware. For example: The hardware of the C slot hardware is mainly extruded aluminum, zinc die-cast alloy, carbonitriding steel, stainless steel, molybdenum disulfide nylon, surface treatment for Dacromet surface treatment, RAL surface color spray (with Ferrari Chassis anti-corrosion treatment is the same) After strict corrosion resistance test, no soda phenomenon will occur.

6, C-type notch hardware connection structure safety: C-type notch hinge with high hardness stainless steel lining (the lining adopts a special structure), when the fastening screw is tightened, the special structure on the lining will be like a tooth Biting into the surface of the aluminum alloy profile forms a number of local deformations (small pits) of 0.2-0.5 mm, which guarantees the safety of the sash and eliminates the occurrence of tripping due to the hardness of connecting screws and aluminum profiles and the appearance of a flat open window (door ) The window (door) fan falls off.

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