Buying a frameless window mainly considers the following aspects:

One, frameless window profiles

The aluminum-magnesium alloy profile is the main profile of the frameless window and window package system. At present, the main use is the No.31 wrought aluminum (LD31), the internationally accepted American brand is 6063T5, which is rapidly cooled and artificially aged by high-temperature extrusion molding. Profiles (RCS). The surface is fluorocarbon sprayed, the color is white, the film thickness is up to 60um, and the CF bond is the strongest binding force among the known chemical bonds in the world.

The content of each chemical component in the profile has a great influence on the mechanical properties of the profile. For example, if the content of magnesium is too low, the strength of the profile is not sufficient. If the magnesium content is too high, the profile will be brittle. Excessive silicon content will reduce the extrusion performance of the profile and Electrolytic coloring properties, silicon content is too low, will reduce the mechanical properties of the profile.

Now many manufacturers add waste wire and waste pot aluminum waste pot in the alloy, basically no 6063 alloy. As a result, the mechanical strength of the aluminum profiles is very low, and can be as low as bending with two hands and one bend. Commonly referred to as "noodles". This is one of the reasons why some unframed aluminum materials can cost thousands of dollars.

Second, the surface treatment of profiles

The surface treatment of the good profile (LD31 aluminum-magnesium alloy) is electrostatic powder coating. The raw material for spraying is fluorocarbon coating of AKZO (Aksu) in the Netherlands. Fluorocarbon coating is based on polyvinylidene fluoride resin (PVDF) as the base material, together with metal particles (aluminum powder) or mica crystals as the organic pigment powder. The chemical structure of the fluorocarbon base material is based on fluorine/carbon chemical bonding. This structure with short bond properties and hydrogen ion bonding is the most stable and strongest bond ever considered.

The main advantages of fluorocarbon coatings are:

1, superior weather resistance, UV resistance;

2, excellent corrosion resistance, chemical resistance;

3, excellent wear resistance, impact resistance;

4, good heat resistance, cold resistance;

5, special good self-cleaning.

Third, the inspection of profiles

1, first check the thickness of the profile, is indeed a thin-walled profile can not be used, look at the cross-section color. Although some profile thickness is very thick, but it is very likely to be processed from recycled materials, usually a good aluminum alloy color white, no color.

2. The surface of the profile should be clean, cracks, peeling, corrosion and bubbles are not allowed and defects such as electric burns, dark spots, and oxide film fallout are not allowed to exist.

3, check the profile of a 6 meters long, whether there is obvious twisting, twisting can not be used very much, because in the cast aluminum window, the profile should be straightened, so that the root profile in the window is always the original twist Tightening stress.

4. The end of the profile should be trimmed with a cut angle of no more than 3 degrees. The profile ends allow partial deformation due to sawing. The longitudinal length of the profile does not exceed 20 mm.

5, the same profile does not allow two shades of different colors appear.

6, in the profile surface with a smooth hard object, light draw, leave a white scratch on the surface of the profile, such as can be wiped off by hand, that does not wipe off the oxide film, such as white scratches can not wipe off, oxide film It has been crossed out, indicating that the oxide film is poor in firmness, the oxide film is too thin, and the aluminum oxide is of poor quality.

7, the profile with two hands bent, twisting strength is better, loose hands can be restored. Not too soft, like "noodles" can never be used.

Four, frameless glass

Glass is the main material of the frameless balcony window, which directly restricts the performance of the frameless balcony window, and also best reflects the style of the frameless balcony window. Therefore, the glass is the important content of the frameless balcony window design. To bear the load, it must have a certain mechanical properties, because there are many kinds of glass, and different glasses have different mechanical properties.

Qualified frameless balcony windows should use tempered glass. Tempered glass is a type of safety glass formed by heat treating flat glass by uniformly heating the original glass sheet in a special heating furnace to a softening point, followed by rapid cooling in air. This process results in a compressive layer on the glass surface and a tensile force in the central part of the glass. The effect on the uniform load, thermal stress and most of the impact load is approximately four times that of the annealed glass. And when the glass breaks, the glass becomes small particles, which has little effect on safety. However, all kinds of processing of this glass must be carried out before quenching, and it is necessary to order according to actual use specifications.

Frameless balcony window to buy the glass has very strict requirements: from the original film of glass, vertical, horizontal glass, glass surface flatness, glass four holes, glass chamfering, chamfering, glass grinding, The screen printing of glass thickness to trademark has strict precision requirements.

Fifth, frameless window plastic parts

In the frameless window accessories, the frequency of use of plastic parts is very high, as above solid plastic, plastic up and down, up and down card plastic, handle, positioning plastic, etc. are all plastic parts.

The raw materials of the plastic parts used on the frameless balcony window should be widely used in the automotive industry, instrument housings, and other PA66s (nylon 66) that require impact resistance and high strength requirements. PA66 has a higher melting point in polyamide materials. It is a semi-crystalline-crystalline material. PA66 (nylon 66) also maintains strong strength and toughness at higher temperatures. The life of this pulley is more than 30 years. It is impossible for any plastic wheel and ordinary nylon pulley to compare with it.

Six, sealing strip

The sealing strip used for frameless balcony windows should be made of high-density composite silicone. Its main advantages are: never deformation, not easy to change color, detachable, washable, good sealing, and have a certain degree of softness, not easily broken Good weather resistance, life-long repair and replacement. Mainly uses safe, green, non-toxic and pollution-free PVC raw materials (food grade). The use of soft and hard dual-machine heating extrusion molding, processed into a sealing strip, the transmittance is strong, anti-aging and other advantages made with recycled plastics are obvious.

Seven, product performance testing

Air permeability: 10Pa or less, unit length, per hour penetration 1.8M3/MH;

Rainwater leakage: Keeping does not occur, the maximum pressure of leakage is 350Pa;

Wind pressure performance: deformation test results, when the relative deflection of the glass panel is 1/150; wind pressure strength value is 1330Pa, the safety inspection results, the glass panel wind pressure strength value is 3320Pa;

The impact properties of the shell bag: The shell bag dropped from the 300mm, 750mm, and 1200mm heights, all four samples were not destroyed, or the total mass of the maximum 10 pieces after the destruction did not exceed the area of ​​65CM2;

Impact resistance: 1040g balls fall freely from a height of 1000MM, 6 specimens are not destroyed;

Debris state: The number of fragments per specimen in the area of ​​50mm*50mm must exceed 40, allowing a small number of long-sized fragments whose length does not exceed 75mm, and whose ends are not edged, long fragments that extend to the edges of the glass. The angle formed with the edge is not more than 45 degrees.

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