Aluminum door and window processing equipment considers aluminum door and window insulation performance index

Insulation strips are the key components of insulated aluminum alloy doors and windows and curtain walls. With the application of insulated aluminum alloy doors and windows and curtain walls, a new product field has been created. Simply speaking, the heat-insulating aluminum profile is based on the traditional aluminum profile, which divides the original one-piece profile into two, and then the two insulation bars are connected by mechanical composite means. The nature of the use of the insulation strip determines that it must have both high strength and low conductivity. Otherwise, it will cause significant quality hazard to the insulated aluminum alloy doors and windows and curtain wall (insufficiency will result in the insulation of the aluminum profile from the insulation strip The joint breaks), or loses the meaning of heat insulation (high conductivity can not guarantee the insulation effect), therefore, the performance of the insulation strip must be strictly examined:

First, the appearance

The whole heat insulation strip should be smooth and flat, without shrinkage holes, no looseness, no scratches and mold extrusion marks. For the light, the minerals have special luster (glass fiber distribution), and the head of the heat insulation strip has no parting line marks. .

Second, the dimensional accuracy

Dimensional deviations of different parts of different batches or the same heat insulation strip are less than 0.1mm, and the parallelism standard, otherwise the stability after the stripping compound can not be guaranteed, and the internal torsional stress is easily caused, thereby making the heat insulating profile The processed insulated doors and windows have a quality problem that is easily deformed.

Third, material properties

1. Load deformation temperature

The sample is heated and deformed to a certain index temperature under a certain load, and is called the load deformation temperature. Different insulation bars may have a large difference in load deformation temperature, which directly reflects the heat resistance of the insulation strip.

2, thermal conductivity

As the metal material of the window frame (such as aluminum alloy, stainless steel, etc.), the thermal conductivity is very large, which makes the heat exchange between the house and the house very fast, which is not conducive to the heat insulation of the house during the summer, and is not conducive to the house in the winter. Insulation and energy saving. The thermal conductivity is the embodiment of the thermal insulation ability of the insulation strip material. The higher the thermal conductivity, the worse the thermal insulation capacity of the thermal insulation strip; on the contrary, the better the thermal insulation capability.

3. Linear expansion coefficient

As an aluminum alloy door and window, curtain wall insulation and energy-saving bridge aluminum joints, the material expansion coefficient must be close to the aluminum material to avoid the separation between the heat insulation strip and the metal due to thermal expansion and contraction.

Fourth, the mechanical properties of the product

1. Lateral tensile strength

When used in winter and summer, there is a large temperature difference between the inner and outer cavity profiles of the heat-insulating profiles that make up the insulated aluminum window. This temperature difference will cause different deformation trends between the inner and outer two-cavity aluminum. In summer, the temperature of the outer cavity profile is high, causing the outer arch to retract. In winter, the temperature of the outer cavity profile is low, causing the inner arch to contract. This non-stop arching stress causes the heat insulating profile to produce a large lateral tensile force in the middle. If the transverse tensile strength of the insulation strip is low, breakage will occur, resulting in quality problems in the insulation profile.

2. Longitudinal tensile strength and elastic modulus

The longitudinal tensile strength reflects the mechanical properties of the thermal insulation strip in the longitudinal direction, and the elastic modulus is one of the most representative indicators of the performance of the material. In engineering, the elastic modulus is called the stiffness of the material, which characterizes the material pair. The resistance of the elastic deformation, the larger the value, the smaller the elastic deformation generated under the same stress, and the more rigid the material.

3, impact strength


When the product is subjected to dynamic load, the impact strength (toughness) performance index of the material is required. The impact strength also indicates the toughness performance of the material. It is one of the performance indexes of the material selection. Good toughness can ensure that the heat insulation strip is compared during assembly. High yield.

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