The wearing strip heat insulation aluminum profile is a composite product made by combining two pre-extruded aluminum profiles with an insulating strip through a specialized manufacturing process. This integration not only enhances thermal performance but also ensures structural integrity. The quality of the final product depends not only on the materials used but also on the precision and technological level of the combined processing. Typically, the process involves four key steps: tooth cutting, threading, rolling, and inspection. Tooth cutting is a critical stage where a hard roller gear, mounted on a gear machine, rolls teeth into the slot necks of the aluminum profiles. The roller gear is driven by a motor via a transmission system, and its 60-degree tooth shape presses into the center of the aluminum slot, applying pressure to push the material forward while simultaneously forming the teeth along the slot. These gears can be adjusted vertically and horizontally using rails to accommodate different profile dimensions. Next, the insulation bar is fed through a threading guide into the notches of the upper and lower aluminum profiles that have already been toothed. This step connects all three components together. In some systems, the stripping process is integrated into the gear machine, allowing the insulation strip to be inserted during the tooth-cutting phase. However, in many cases, there is no strong bond between the insulation strip and the aluminum, resulting in a loose fit that allows movement between the two. To address this, a set of toothed wheels, driven by a motor, pushes the insulation strip into the slots of the aluminum profiles. For aluminum profiles with a narrow gap (less than 10 mm) between the two slots, manual stripping may be required due to the difficulty of using automated equipment. The third step involves rolling, where the profile is passed through a roller press equipped with three sets of rolling plates. During this process, the outer hammers of the aluminum are pressed against the insulation strip, with their neck roots acting as the pivot point. The teeth on the hammer heads then bite into the insulation strip, ensuring a tight and secure connection between the aluminum and the insulation material. Finally, the fourth step is testing. After rolling, the dimensional accuracy of the aluminum is measured, and the longitudinal shear strength is evaluated as a key mechanical property. The test involves installing a 100mm-long specimen on a dedicated longitudinal shear testing machine. Under external force, the insulation strip and aluminum are separated, and the load required for deformation is recorded. The result is expressed as the longitudinal shear strength in N/mm. According to GB5237.6, the longitudinal shear strength of the insulation aluminum profile should exceed 24 N/mm. To determine the characteristic value, a group of 10 test samples is taken, and the mean and standard deviation are calculated. The final value is obtained by subtracting 2.02 times the standard deviation from the mean. Therefore, the consistency of the test results is crucial to ensure that each sample meets the required standards. The stability of the test data is closely related to both the reliability of the equipment and the uniformity of the aluminum material.
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