GB/T 5237.6-2017Wrought aluminium alloy extruded profiles for architecture - Part 6: Thermal barrier profiles (English PDF)

Foreword

GB/T 5237 "Aluminum Alloy Building Profile" is divided into six parts.

--- Part 1. Substrate;

--- Part 2. Profiles;

---Part 3. Electrophoretic paint profiles;

---Part 4. Spray profiles;

---Part 5. Painting profiles;

--- Part 6. Thermal insulation profiles. This part is the sixth part of GB/T 5237. This part is drafted in accordance with the rules given in GB/T 1.1-2009. This part replaces GB 5237.6-2012 "Aluminum Alloy Building Profiles Part 6. Insulation Profiles". This part and GB 5237.6- Compared with.2012, the main technical changes except editorial changes are as follows:

--- Deleted the statement in the preface that "the

4.5.1.2 of this part,

4.5.2.2 is mandatory, and the remaining clauses are recommended" (see Preface to the.2012 edition);

--- Added normative reference document GB/T 2411 (see Chapters 2 and 6.5);

--- Removed the normative reference document GB/T 6682 (see Chapters 2 and A.3.1 of the.2012 edition);

--- Removed the normative reference document YS/T 436 (see Chapters 2 and

4.1.3 of the.2012 edition);

1 Scope

Part 6 of China's national standard for architectural aluminium alloy extruded profiles, covering thermal barrier profiles. Aluminium conducts heat about a thousand times better than the insulating glass a window frame holds, so an ordinary aluminium frame is a thermal short circuit through the wall - it loses heat, and in cold weather it condenses water on the inside face, which is what ruins the surrounding finishes. A thermal barrier profile solves it by splitting the section into an inner and an outer part joined by low-conductivity polyamide strips, or by a poured and debridged resin, so heat cannot cross. That composite has to carry the frame's full structural load through the plastic joint, in shear, for the life of the building and through every thermal cycle, which is why the transverse tensile and shear tests are the substance of the standard. The part covers both strip-type and poured types, and specifies the requirements, test methods, inspection rules, marking, packaging, transport, storage, quality certificates and order contents.

2 Composite methods and characteristics of thermal insulation profiles Composite method a Insulation profile characteristics b, c Wear strip The linear expansion coefficient of the polyamide profile used in the strip profile is close to the linear expansion coefficient of the aluminum alloy profile, and will not be complicated by thermal expansion and contraction. The joints are subject to large stress, slippage, and shedding. The strip profile has good high temperature resistance and optional cross section type There are no special requirements for the production and processing environment of heat-insulating profiles, but the production process of the processes such as tooth opening and rolling is not properly controlled. Can have serious effects (such as separation of polyamide profiles and aluminum profiles in use). By adopting a non-I type complex shape polyamide profile, the heat transfer coefficient of the strip profile can be reduced, and the heat insulation effect of the strip profile can be improved. But adopt The cross-section of the non-I type complex shape polyamide profile has a transverse tensile strength that is less than that of the profiled profile of the type I polyamide profile. If the mechanical reliability check or the simulated load test is not performed before, it may cause accidental cracking during use. With a strip of profile with a single polyamide profile, the composite properties may not meet the requirements of this section. For the wearing of structural parts, it is advisable to adopt Double polyamide profiles Pouring The coefficient of linear expansion of the thermal insulation used in the cast profile is inconsistent with the coefficient of linear expansion of the aluminum alloy profile, but it is effective on the surface of the adhesive layer. At the time, it is sufficient to ensure that the composite part of the cast profile does not cause slippage, peeling and the like. Cast profiles have good impact resistance and elongation Extensibility, but if the production environment of the pouring process is not properly controlled, it will have a serious impact on product performance (such as low temperature fracture). Casting profiles using Class I insulation are used at 70 ° C or higher, and the composite properties are attenuated, resulting in a decrease in load carrying capacity. When the surface treatment of the aluminum alloy profile results in the insulation glue not being able to effectively bond the surface of the film layer, it is not suitable to be cast by composite method. Thermal insulation profile a At the same time there is a thermal insulation profile of the strip and cast composite, the performance of which must meet the performance requirements of the profiled and cast profiles. b When insulation profiles are used in certain structural parts, they may be subjected to various loads and effects such as gravity load, wind load, earthquake action, temperature action, etc. The demander should use the most unfavorable combination of effects as the load combination according to the environment and design requirements of the insulation profile, and the insulation profile under the load combination, It is possible to calculate or analyze the stress indicators such as bending deformation, bending strength, longitudinal shear strength, and transverse tensile strength, so as to select suitable Thermal insulation profiles. c For the calculation method of the equivalent moment of inertia of insulating profiles, see YS/T 437.

4.1.4 Insulation profile shear failure type Insulation profiles are classified into A, B, and O according to the type of shear failure, as shown in Table 3. Table

3 Heat insulation profile shear failure type Cut failure type description A heat-insulating profile that does not affect the transverse tensile properties after shear failure of the composite part, generally a strip profile. See Figure 2a) B. Insulation failure of composite parts will cause transverse tensile failure of the insulation profile, generally cast profiles. See Figure 2b) Deliberately designed for low longitudinal shear resistance or low longitudinal shear resistance due to special requirements (eg to solve the hot arch phenomenon of the door leaf) Strip profiles. See Figure 2c)

c) Class O Description. 1

---aluminum alloy profile; 2

---Insulation material. Figure

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 2411 Plastic and hard rubber using a hardness tester to determine the indentation hardness (Shore hardness)

GB/T 3199 Aluminum and aluminum alloy processing products packaging, marking, transportation, storage

GB/T 5237.1 aluminium alloy building profiles - Part 1.

GB/T 5237.2 aluminium alloy building profiles - part 2. anodized profiles

GB/T 5237.3 aluminium alloy building profiles - part 3. electrophoretic coating profiles

GB/T 5237.4 aluminium alloy building profiles - part 4. dusting profiles

GB/T 5237.5 aluminium alloy building profiles - part 5. painting profiles

GB/T 23615.1 Thermal insulation materials for aluminium alloy building profiles - Part 1. Polyamide profiles

GB/T 23615.2 Thermal insulation materials for aluminium alloy building profiles - Part 2. Polyurethane insulation

GB/T 28289 Aluminum alloy insulation profile composite performance test method

GB/T 34482 Method for determining heat transfer coefficient of aluminum alloy insulation profiles for building YS/T 437 aluminum profile cross-section geometry parameter algorithm and computer program requirements

3 Terms and definitions

The following terms and definitions apply to this document.

3.1 Thermal insulation material A non-metallic material with a low thermal conductivity for joining aluminum alloy profiles.

3.2 Wear strip method Through the teeth, the strips and the rolling, the polyamide profile is penetrated into the strip of the aluminum alloy profile and is engaged by the aluminum alloy profile [eg Figure 1a)] composite mode.

3.3 Pouring styleduredanddebridgedmethodology The liquid heat insulating material is injected into the casting groove of the aluminum alloy profile and solidified, and the connecting bridge in the casting groove of the aluminum alloy profile is cut off to break the gold It is a composite method in which the two parts of the aluminum alloy profile are broken together by the heat insulating material [Fig. 1b).

3.4 Thermal profile profile A composite profile having a heat insulating function made by connecting an aluminum alloy profile with a heat insulating material.

3.5 Eigenvalue Obey the lognormal distribution, and determine and calculate the performance value by 95% guaranteed probability and 75% confidence.