Preparation method for heat insulation aluminum alloy profile

An aluminum alloy profile and aluminum alloy-based technology, which is applied to the device, coating, pretreatment surface and other directions of coating liquid on the surface, which can solve the problem of poor overall strength of the profile, large heat transfer coefficient, and profile hardness cracks, etc. problems, to ensure decorative and weather resistance, improve compatibility, and enhance longitudinal shear resistance

Pending Publication Date: 2021-10-26
GUANGDONG JMA ALUMINUM PROFILE FACTORY GRP +1
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] 1. Strip-type heat-insulating aluminum profile: Since the strip-type heat-insulating aluminum profile uses heat-insulating strips to connect two parts of the aluminum profile into an integral part by occlusion, the material structure changes under this process, and stress is generated to make the profile The overall strength is poor, such a process limits the strength of the insulation material, and sometimes it is even used for a slightly larger hardness of the profile to produce obvious cracks or fractures, making it a waste product
In addition, the heat transfer coefficient of polyurethane heat insulation strip is larger than that of polyester injection material, so the heat insulation effect of the former product is not as good as that of the latter
[0005] 2. Glue-injected heat-insulating aluminum profile: The glue-injected heat-insulated product uses liquid heat-insulating material to be poured into the groove of the profile, and the heat-insulating bridge formed after curing connects the inner and outer aluminum alloy profiles. Since the surface of the profile needs to be surface treated , the compatibility of the protective film layer on the surface of the product and the thermal insulation adhesive is very important. At present, the commonly used glue injection type thermal insulation products are powder sprayed, because the compatibility of ordinary powder coating and thermal insulation adhesive is not bad. It is ideal, but its outdoor weather resistance is poor, so it is not suitable for use in places exposed to high-intensity sunlight, and the compatibility of high weather resistance fluorocarbon coatings with heat-insulating adhesives is poor, resulting in poor longitudinal shear mechanical properties, so it is not used

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  • Preparation method for heat insulation aluminum alloy profile
  • Preparation method for heat insulation aluminum alloy profile
  • Preparation method for heat insulation aluminum alloy profile

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preparation example Construction

[0046] Such as figure 1 As shown, the invention provides a method for preparing a heat-insulating aluminum alloy profile, comprising the following steps:

[0047] S101. Sandblasting the glue injection notch of the aluminum alloy base material, forming a sand surface on the surface of the glue injection notch;

[0048] Step S101 includes:

[0049] Place the injection notch of the aluminum alloy base material facing upwards;

[0050] Shot peening with a particle size of 0.1-0.5 mm is used for coarse sand treatment to form a sand surface on the surface of the glue injection notch. Preferably, the shot peening is 0.2-0.3mm.

[0051] The present invention uses mechanical pretreatment to increase the roughness of the surface of the glue injection notch of the profile, and produces a uniform and fine concave-convex surface on the surface of the glue injection notch, ensuring that there are enough anchor points after the subsequent heat insulation material is poured, and its longit...

Embodiment 1

[0089] (1) Place the glue injection notch of the aluminum alloy base material upwards, use shot blasting with a particle size of 0.1 mm to carry out coarse sand treatment, and form a sand surface on the surface of the glue injection notch;

[0090] (2) The aluminum alloy substrate is washed with water, degreasing pretreatment, water washing, forming a passivation film, washing with water, and drying in sequence, wherein the amount of degreasing etching is 1.5g / m 2 The passivating agent is a chromium phosphate passivating agent;

[0091] (3) Dilute the primer with a diluent until the viscosity is 10', and then use the spraying equipment to spray the primer on the surface of the profile to form a layer of coating film. The thickness of the coating film is controlled at 7 μm. Among them, the primer is PVDF fluorine Carbon coating, the raw material of PVDF fluorocarbon coating includes resin, wherein, the resin includes fluorocarbon resin, and the ratio of the fluorocarbon resin t...

Embodiment 2

[0098] (1) Place the glue injection notch of the aluminum alloy base material upwards, use shot blasting with a particle size of 0.2 mm to carry out coarse sand treatment, and form a sand surface on the surface of the glue injection notch;

[0099] (2) The aluminum alloy substrate is washed with water, degreasing pretreatment, water washing, forming a passivation film, washing with water, and drying in sequence, wherein the amount of degreasing and etching is 1.8g / m 2 The passivating agent is a chromium phosphate passivating agent;

[0100](3) Dilute the primer with a diluent to a viscosity of 12', and then use the spraying equipment to spray the primer on the surface of the profile to form a layer of coating film. The thickness of the coating film is controlled at 10 μm. Among them, the primer is PVDF fluorine Carbon coating, the raw material of PVDF fluorocarbon coating includes resin, wherein, the resin includes fluorocarbon resin, and the ratio of the fluorocarbon resin to...

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Abstract

The invention discloses a preparation method for a heat insulation aluminum alloy profile. The preparation method comprises the following steps that sand blasting treatment is carried out on a glue injection notch of an aluminum alloy base material, and a sand surface is formed on the surface of the glue injection notch; the aluminum alloy base material is subjected to passivation pretreatment; the aluminum alloy base material is subjected to primer spraying treatment by selecting a PVDF fluorocarbon coating and is dried; the aluminum alloy base material is subjected to finish paint spraying treatment by selecting a PVDF fluorocarbon coating and is dried; the aluminum alloy base material is cured; the glue injection notch of the aluminum alloy base material is subjected to embossing treatment, and a concave tooth opening is formed in the edge of the glue injection notch; heat insulation glue is injected into the glue injection notch, and dried and cured; and the aluminum alloy base material subjected to glue injection is subjected to bridge cutting treatment to obtain a finished product. By the adoption of the preparation method, the aluminum alloy profile good in weather resistance and heat insulation effect can be obtained, the longitudinal shear mechanical property and the like meet the performance requirements, and the aluminum alloy profile can be suitable for outdoor high-strength sunlight irradiation.

Description

technical field [0001] The invention relates to the technical field of aluminum profiles, in particular to a method for preparing heat-insulating aluminum alloy profiles. Background technique [0002] The surface-treated aluminum alloy profiles are widely used in building doors, windows or curtain wall structures because of their surface decoration and protection. In order to improve the thermal insulation coefficient of doors, windows or curtain wall products, it is often necessary to replace part of the structure of aluminum alloy profiles with heat-insulating materials instead of aluminum alloy metal materials to reduce the thermal conductivity of door and window products. There are two types of products currently used: strip-type heat-insulating aluminum profiles and glue-injected heat-insulating profiles. The former is to pass the heat insulation strip (material: polyurethane 66 with 25% glass fiber) into the process grooves of two aluminum alloy profiles, and then rol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/14B05D1/38B05D3/02B05D3/10C09D127/12C09D133/00C09D163/00C09D167/00C09D7/65C09D5/00
CPCB05D7/14B05D7/574B05D3/102B05D3/0254B05D1/38C09D127/12C09D7/65C09D5/002B05D2506/10B05D2502/00B05D2504/00B05D2508/00B05D2350/38C08L33/00C08L63/00C08L67/00B05D2420/01B05D2420/02
Inventor 罗士烓熊建卿王洪伟朱胜林
Owner GUANGDONG JMA ALUMINUM PROFILE FACTORY GRP
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