Every time when the summer heat, aluminum manufacturers of aluminum windows and doors not only that this can stop the outdoor heat, reduce indoor air loss, and in the cold winter will not icing or condensation, the most important thing is still the great to resist the noise outside the window. Important is good quality aluminum die Which Shandong, Jinan aluminum mold aluminum manufacturers tell us Which is good, this wood-clad windows and doors biggest feature is the thermal characteristics of aluminum doors and solid wood doors combine the two into one, and also has a good environmental protection, good quality decorative aluminum mold Which, in energy efficiency is also higher than aluminum windows and doors, and the main force structure for aluminum thermal break. The first is to see whether there is a significant distortion of aluminum, the surface is smooth, there are no cracks or boldness, scratches, burrs place, if you find any, it is best not to buy. Second, is to carefully check whether the color of the aluminum surface has different shades of color, there is color that shows the quality, but off. Of course, the same model can also put together profiles were compared, of course, if the color is best not to buy too obvious. To check whether the thickness of aluminum sections and marked with the same model. Finally, with a smooth hard object to scratch at the surface of aluminum, will leave a white scratches, aluminum wipe gently and observe, if you can not wipe off, indicating that the material may have quality problems, but if the opposite You can easily wipe off, indicating that the surface of the oxide film thickness profiles are qualified. Which is good aluminum molds | aluminum rolls | aluminum die rolls provided by the Aluminum Co. of Jinan. Jinan Heshun Aluminum Co. (www.jnhsly.com) Shandong Jinan, aluminum products leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Aluminum leadership in cis with the staff warmly welcome all inquiries negotiations to create a better future for aluminum rolls.