Discussion on the quality issues of aluminum profile insulation strips

With the increasing demand for environmental protection and energy conservation, many advanced energy-saving products and processes have gradually been applied to the construction industry in China. The issue of energy conservation and insulation is very important for buildings, as it relates to thousands of households and is closely related to people's lives. Doors and windows play a crucial role in the energy-saving system of houses.

As a key component of insulated aluminum alloy doors, windows, and curtain walls, insulation strips have also created a new product field with the application of insulated aluminum alloy doors, windows, and curtain walls. In short, thermal insulation aluminum alloy is the process of dividing the original integrated profile into two parts based on traditional aluminum alloy, and then connecting the separated two parts together through mechanical composite means using two thermal insulation strips.

The use nature of insulation strips determines that they must have both high strength and low conductivity. Otherwise, it will either cause significant quality hazards for insulated aluminum alloy doors, windows, and curtain walls (insufficient strength will cause the insulated aluminum profile to break from the connection of the insulation strip), or lose its insulation significance (high conductivity cannot guarantee the insulation effect). Therefore, the material selection and manufacturing process of insulation strips are crucial.

1、 How to classify

1. Appearance

Under natural scattered light, visually inspect at a distance of 0.5m with normal vision (without using a magnifying glass). The appearance of the insulation strip should be smooth, flat, with uniform color, and there should be no appearance defects on the surface that affect its use. Broken ends are not allowed on straight strips, and the number of broken ends on rolled strips should not exceed 2.

2. Breaking experiment

Randomly take samples for manual breaking experiments. When the nylon insulation strip is bent, it can feel good toughness and strength, and it will not break even when the two ends are folded together, even if the fracture shows a slow fracture phenomenon; Some nylon insulation strips either have obvious brittleness and produce multiple bursts when bent to a certain distance between the two ends, or have obvious toughness and are repeatedly bent multiple times; The PVC insulation strip is very soft, basically without strength, and will not break when repeatedly bent.

3. Overall dimensional accuracy.

By using a vernier caliper (micrometer is more accurate) to test the dimensional accuracy of the insulation strip, it can be found that the size deviation of nylon insulation strips in different batches or different parts of the same insulation strip is less than 0.1mm, and the parallelism is standard; The size deviation of different batches of certain nylon or PVC insulation strips or different parts of the same insulation strip should be at least 0.1mm.