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Aluminum alloy door and window "C" slot and "U" slot difference

Aluminum alloy door and window "C" slot and "U" slot difference

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2018-12-06
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(Summary description)material comparison: C-shaped slot hardware is a special aluminum alloy (metal) door and window hardware,

Aluminum alloy door and window "C" slot and "U" slot difference

(Summary description)material comparison: C-shaped slot hardware is a special aluminum alloy (metal) door and window hardware,

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2018-12-06 16:35
  • Views:
Information

At present, the metal slot of China's aluminum alloy door and window profiles on the market has U-shaped and C-type. The use of aluminum alloy doors and windows is due to the introduction of European aluminum alloy door and window system. In European aluminum alloy door and window system, there is only European standard notch. Aluminum alloy special hardware slot, which is now the so-called "C" slot in the Chinese market; U-shaped hardware slot is the European standard slot for plastic steel doors and windows, aluminum alloy door and window hardware due to the special requirements of the material and structure of aluminum alloy door and window hardware The price is too high, and the price of plastic steel door and window hardware is about 40% lower than that of aluminum alloy door and window hardware. Therefore, there are aluminum alloy profile manufacturers who transplant the metal notch of plastic steel doors and windows to the aluminum alloy door and window profiles, and there are also aluminum alloy doors and windows. U" slot.

The reasons why 3X European aluminum alloy door and window systems do not use U-shaped notches are as follows:

1. Hardware design principle of U-shaped notch: U-shaped notch (hardware) is a special hardware slot for plastic doors and windows and wooden doors and windows in Europe. The hardware connection of U-shaped notch is installed by self-tapping screws. Hardware. However, if it is applied to aluminum alloy doors and windows, when the self-tapping screws for U-groove hardware are used to carry the longitudinal shear force generated by the door and window switches, since the hardness of the self-tapping screws is much larger than that of the aluminum alloy profiles, the self-tapping screws The buckle will cause damage to the aluminum alloy profile, causing the installation hole to expand, and the screw connection of the hardware will be tripped. Since the inner lining of the plastic steel doors and windows is steel, the hardness of the material is equal to that of the self-tapping screws, and the installation hole expansion and the hardware tripping phenomenon do not occur. Due to the strong design principle of U-notch (hardware) applied on aluminum alloy doors and windows does not meet the mechanical materials in mechanical design, European aluminum alloy doors and windows do not use U-shaped notch (hardware) for the safety of doors and windows hardware. .

2, the U-notch hardware causes corrosion of aluminum alloy doors and windows: the material of the U-shaped slot hardware is steel, when the hardware is connected to the aluminum profile by steel self-tapping screws, it will occur when it is attacked by rain and humid air. The more obvious chemical reaction (according to the phenomenon of alkalizing) affects the use of doors and windows and damages the waterproof structure of doors and windows.

3, C-type slot hardware design principle advanced: C-type slot hardware installation is based on stainless steel nail top force and machine screw stainless steel lining and hardware slot clamping force to ensure the installation of the hardware is firm, stainless steel nails tight A local deformation of about 0.5 to 1.0 mm is generated on the surface of the profile so that the stainless steel nail and the aluminum profile are tightly combined to ensure that the hardware does not shift when subjected to force.

4. C-type slot hardware is easy to install: no need to install mounting holes, no self-tapping screws are used, easy to install, low dependence on equipment (electricity, gas) auxiliary conditions, and can be installed on site.

5, material comparison: C-shaped slot hardware is a special aluminum alloy (metal) door and window hardware, and U-shaped slot hardware is derived from plastic doors and windows, from the material requirements to the hardness requirements of hardware rods are lower than the C-shaped slot Mouth hardware. For example: the hardware of C-type slot hardware is mainly extruded aluminum, zinc-based die-casting alloy, carbon-nitrogen-impregnated steel, stainless steel, molybdenum disulfide nylon, surface treatment for Dacromet surface treatment, RAL surface color coating (with Ferrari The chassis anti-corrosion treatment is the same), after a strict corrosion resistance test, no alkali formation will occur.

6. Connection structure safety of C-type slot hardware: C-type slot hinge adopts high-hardness stainless steel lining (the lining adopts 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, forming a number of local deformations (small pits) of 0.2 to 0.5 mm, thereby ensuring the safety performance of the sash, and preventing the occurrence of tripping due to the hardness of the connecting screws and the aluminum profiles. The window (door) fan is detached.

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