Some aluminum manufacturers make glue-injection broken bridges For aluminum profiles, bubbles may appear in the glue strips used, so why is this? In fact, the bubbles in the glue can be divided into small bubbles in the glue strip, large bubbles in the glue strip and foaming in the glue strip.
If there are small bubbles or small pits on the insulation strip, the main reason is due to moisture or leakage of cleaning agent. There are roughly three situations: . The first phenomenon, There are uniform small bubbles on the surface of the strip. The reason is due to the humid environment, such as the rainy season in the south, heavy foggy weather, ground spraying in the processing environment, leakage of profiles or glue caused by rainy days in the profile storage warehouse, etc. Moisture. The treatment method is to isolate the environment from the outside world and dehumidify and dry it immediately. The second phenomenon is that there are continuous small bubbles on both sides of the joint between the strip surface and the profile. The reason is that the profile surface is damp or the temperature is too low. This phenomenon It is easy to appear in sand powder and oxidized materials. The treatment method is to dry the profile, transfer the profile to a constant temperature room, and wait until the temperature of the profile reaches 18℃ or above before injecting glue. The third phenomenon is that there are small bubbles on the surface and inside of the rubber strip. The reason is that the three-way switching valve of the glue injection head is not closed tightly, there is solvent/cleaning agent leakage during the mixing process, the metering pump shaft end seal is damaged, and the glue absorbs tide. The solution is to check whether the three-way switching valve is abnormal, and check whether the switching is smooth by repeatedly switching the three-way ball valve. Add new glue into the material tank to reduce the relative amount of water. Replace metering pump seals (packing, frame, seal).
If there are large bubbles on the surface and inside of the strip, the main symptoms areBefore the insulation glue is cured, you can see that large bubbles are constantly emerging from the surface of the adhesive strip, accompanied by some floating The bubbles that emerge appear to burst, and the spacing between these bubbles is irregular. The reason is that the locking point design of the profile glue injection notch is unreasonable, the upper locking point is too high, the inner arc of the locking point is small, the angle of the glue injection head is unreasonable, the viscosity of the glue is too high or the temperature is too low. The solution is to optimize the notch design, reduce the size of the locking point, increase the inner arc of the locking point, adjust the glue injection angle of the glue injection head (65-80 degrees is preferred), and increase the temperature of the glue At the same time, the profile temperature is increased.
If foaming of the adhesive strip occurs, it will mainly be seen during the glue injection process. When curing, the adhesive strip bulges out of the heat-insulating notch, accompanied by Dense cells are produced, the strip becomes brittle, the mechanical properties are significantly reduced, the color of the strip changes, etc. The reasons are that the glue has seriously expired, new and old glues are mixed, the filling barrel is a contaminated secondary use barrel, the storage barrel or tank has not been strictly sealed for a long time, and the material has absorbed moisture in the environment. The solution is to replace the glue with new glue in time.
Weigu aluminum profile insulation glueYesTwo-component polyurethane elastomer material. As a thermal insulation material, polyurethane can provide excellent heat insulation for buildings. plan. Shanghai Weigu adheres to advanced European technology and has decades of production experience and technology accumulation. The various properties of its aluminum profile insulation adhesive products fully meet the requirements of existing national standards. Weigu aluminum profile thermal insulation glue haswaterproof, moisture-proof, and Green and environmentally friendly, UV resistance, good heat insulation and energy saving effect, good earthquake resistance, excellent mechanical properties, high production efficiency, saving the aluminum consumption of door, window and curtain wall aluminum profiles and other excellent characteristics.
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