How to correctly identify the pros and cons of cast aluminum doors

When you just bought a new house, do you want to install a high-end cast aluminum door?

The market is so big, there are so many samples of cast aluminum doors, and the price gap is also huge. How can I buy a genuine and high-quality cast aluminum door?

Customer recognition and market development have made cast aluminum door products spring up like bamboo shoots after a rain. Most of the manufacturers are transforming and upgrading, and are working hard to make new products, but there are also many companies and individuals who come for the \”profit\” of cast aluminum doors, and always try every means to reduce costs in disguised ways. Assembling products from miscellaneous brands, passing them off as good ones, making things in a shoddy way, and using low prices to lure customers. As a result, many fake and shoddy cast aluminum door products have appeared, disrupting the market, confusing customers, and greatly damaging the legitimate rights and interests of legitimate manufacturers, merchants, and users.

Now I will tell you how to identify the quality of cast aluminum doors. Avoid regretting the mistake of buying fake or shoddy products. First, I will teach you three tips to purchase high-quality cast aluminum doors:

The first step: look

Take a look at the surface paint. Don’t think that bright paint is good. Paint that often looks very bright is veryEye-catching, but this kind of paint is often temporary and will fade quickly; the paint baked at high temperature in the oven looks thick and solid, beautiful but not gaudy, and very eye-catching. Only this kind of paint can last for more than 10 years without fading. .

Second, look at the surface details of the door. Check whether each welding and connection point of the product is smooth and without traces; whether there are any defects on the door surface; when the door is closed, whether the line left on the edge of the door is smooth and consistent, and whether the gap is large; whether the surface paint is even and has No particle bubbles. High-quality doors generally have no flaws, while inferior doors will appear to have many problems.

Thirdly, look at the materials of the main components such as the cast aluminum panel and the door frame steel plate. The quality of cast aluminum plates is not related to thickness, but depends on the structural composition of the cast aluminum alloy. We can check whether there are black spots on the exposed aluminum plate from the keyhole. If there are any, it means there are more impurities. It is definitely not cast by standard alloy aluminum ingots or recycled aluminum scraps are mixed in and processed. This kind of plate itself is It will oxidize and corrode quickly; the material and thickness of the door frame steel plate can be seen from the inside of the door frame. The national Class A anti-theft door standard stipulates that the steel plate thickness is 2mm. Currently on the market Door frame and door leaf edging materials include hot-dip galvanized steel plates, cold-dip galvanized steel plates, cold-rolled plates, stainless steel plates, aluminum profiles, etc. The best material among them is hot-dip galvanized steel plates. This kind of steel plates not only has good hardness and strength, but also lasts forever. Rust, strong paint adhesion; cold-dip galvanized steel plates and cold-rolled plates themselves will rust; stainless steel plates have poor paint adhesion; aluminum profiles have insufficient hardness and strength, are easily deformed, and have poor corrosion resistance.

Look at the main hardware accessories such as hinges and sealing strips of the door. The main hardware accessories of cast aluminum doors are hinges, locks, and sealing strips. Except for the lock, which can be selected by the customer, the other two accessories are prepared by the manufacturer. Because the cast aluminum door itself is heavy, the quality of the hinges directly affects the function and service life of the door. The best hinge currently on the market is the\”three-dimensional adjustable\” developed and manufactured by Zhejiang Dingli Industrial Co., Ltd. and obtained the national patent. Concealed hinges\”. The hinge has a single bearing capacity of more than 800kg and has super stability, sealing and safety, ensuring that the door will never sag and remain safe. The second is the \”three-dimensional adjustable exposed hinge\” introduced from Taiwan (the rotating part is exposed), which can bear a load of 150kg. However, its sealing, stability and anti-theft performance are poor, and the door is easy to sag and shift. The other type is the \”Heaven and Earth Hinge\” (a set of two upper and lower hinges). The stress point is mainly at the lower part of the hinge. Due to uneven stress points, the wear and tear is inconsistent, which can easily cause the door to sag and deform, affecting its use and lifespan. ; Sealing strips play a vital role in the sound insulation, heat preservation, and safety of the door. Currently, the best sealing strip is EPDM (ethylene propylene diene monomer), the same material used in cars. This sealing strip is soft and delicate. ,It has good elasticity, does not crack, and has a long service life. If the sealing strip is relatively thick, rough, and has a poor feel, it will be easily deformed, have poor elasticity, and will crack, which will greatly affect its sealing performance and safety.

Second move: Touch

Touch the facade Finish vs. hardness of paint. Touch the paint on the surface of the door is more direct than looking at it. You can tell whether it is flat and smooth and whether there are particles. We can also lightly scratch the surface with our fingernails to test its smoothness and hardness. The paint hardness of good-quality doors has a standard, which is generally not less than 2H. There is no problem if you lightly scratch it with your fingernails or other blunt instruments.

The flatness of the surface junction of the second touch door. The junction of the door frame of a good door is traceless, very flat and smooth, with no unevenness, and the door leaf edges are also neat and flawless.

Three-touch the screws on the side of the door leaf and lock. The screw should be made of stainless steel, preferably an inner hexagonal cap. Check by hand whether the joint between the screw and the door leaf or lock body is flat, and whether the surface of the screw is smooth.

The flexibility and elasticity of the four-touch sealing strip. The flexibility and elasticity of high-grade rubber EPDM sealing strips are very good. If the sealing strips are not flexible and elastic, then the door\’s thermal insulation, sound insulation, windproof, and anti-theft will be very poor.

The third step: Listen

Listen to the sound of the door opening and closing. There is no sound when opening a high-quality door, and you can only hear the sound of the lock bolt closing when the door is closed. If there is an abnormal sound when the door is opened, it means there is a problem with the hinge. If there is a loud \”bang\” sound when the door is closed, it means there is a gap in the door leaf. There are problems with the fit and sealing strips, such as the \”silent heavy door\” of Ohua Zundi. There is no sound at all when opening or closing the door. The sound insulation performance of the door is closed. When you listen to how much the outdoor sound has been reduced, generally a door with better quality can reduce it by about 30 decibels. The inspection department determined that the Ouhua Zundi cast aluminum door has reduced by 35 decibels, which means that it is normal for people inside the door not to be able to hear clearly outside the door.

Thirdly listen to the sound of knocking on the door. Use your hands to tap multiple parts of the front and back of the door fan (especially the protruding parts of the aluminum plate). If you hear any noise, or false sounds, indicating that the middle of the door is empty or The door panel is very thin and does not stick to the door frame. The door is just beautiful in appearance but has lining inside. The high-quality door is made of standard materials and exquisite craftsmanship. No matter where you knock, the door always has a thick and solid sound. , will never produce empty noise or abnormal noise.

Fourth, listen to whether there is any sound when the door is closed. There is no gap when the door is closed and locked. , you can’t push it with your hands, so when you push or pull it, you can’t push it. There will be no sound. If there is a sound, it means that the door does not fit well, the gap is large, or the sealing strip is not sealed.
As long as you learn the above three tricks, you will not be afraid of being deceived, and you will definitely make the right choice. A good door in my mind