The difference between strip feeding and injection thermal break aluminum profile

Strip feeding thermal break and injection thermal break aluminum profiles difference

There are two main production ways for thermal break aluminum profile.

One is strip feeding way, through the mechanical teeth forming, strip feeding, rolling and other processes to form a “insulation bridge”, known as the insulation profile “strip feeding type “; it is thermal break aluminum profile making machine.

Another way is the insulation material injected into the aluminum alloy insulation cavity, after curing and other processes to form ” insulation bridge “, known as” injection” thermal break aluminum profiles.

Injection thermal break aluminum profile technology is coming from US, main function is injecting the mixture into the middle of window and door aluminum profiles.

Strip feeding technology, use the thermal barrier strip to connect two parts of aluminum profiles, prevent the heat conduction, cut the heat loss to achieve the energy saving purpose.

I.Injection and strip feeding process different

Strip feeding process

Strip feeding thermal break aluminum profile has teeth forming, strip feeding and rolling 3 processes in the production, also we can make teething and strip feeding both processes in one machine to finish it, it is called 2 steps.

Teeth forming, The first step is using the teeth forming machine with strip feeder to knurl the notch of aluminum extrusion profile, making teeth and feeding strip in one aluminum profile;

Strip feeder, putting thermal barrier strip in the notch of aluminum profiles, connect 2 pieces aluminum profiles in one part, ready for the rolling process;

Rolling forming machine make the aluminum profiles with thermal barrier rolled, having the compound function.

Injection process

Injection process is making aluminum profiles with surface treatment moved in linear through walking system, insulation materials will be flow in the insulation cavity when aluminum profile insulation cavity go through the injector head, cut off it after some time curing.

II Insulating material

Strip feeding process, the insulation materials is the thermal barrier, the current regular thermal barrier is polyamide 66 (commonly known as nylon 66), its production methods have two: hard pushing and pulling method.

The insulation materials of hard pushing has tight structure, good appearance but more “fragile “, the insulation materials of pulling method has good toughness, but poor appearance.

In order to pursue the surface aesthetics and precision, The insulated materials will be produced by PA66 nylon with ultra-fine glass fiber, that is the main features for the insulated materials in foreign countries.　

Injection process, the insulation materials is polyurethane(PU)insulation adhesive, its composition is generally composed of a resin component and an isocyanate component.

III Equipment

Strip feeding equipment is divided into imported equipment and China equipment.

Imported equipment mainly is from Germany or Switzerland. The whole equipment includes teeth forming machine, strip feeder, rolling machine and tester.

The cost of imported equipment is expensive and China Brightstar thermal break aluminum making machine is more competitive.

Injection process, as the equipment and melt adhesive are closely interrelated technology, so the equipment supplier and melt adhesive supplier is the same. The mixing ratio of the two raw materials is fixed, so that the manufacturers must use its raw materials, otherwise it cannot run the production.

Strip thermal break aluminum profile

IV Thermal break aluminum profiles made by both processes different

Strip feeding thermal break aluminum profile, two time extrusion processes, feed thermal barrier strip into the notch of 2 pieces aluminum profiles, after the rolling, get finished aluminum profile.

Profile cross-sectional area: compact, small and beautiful.

Thermal expansion coefficient: It is similar as aluminum profiles.

Plasticity: can be made of various special-shaped doors and windows, including the smaller diameter of the 360-shaped curved window.

Injection thermal break aluminum profile, one-time aluminum extrusion, reducing the process defects, polyurethane will be injected into the aluminum insulation cavity, curing and forming polyurethane insulation bridge, due to the high adhesion of polyurethane, insulation bridge and Aluminum is completely integrated, so aluminum profile has good strength.

Injection thermal break aluminum profile

V Aluminum profile cost

Aluminum profile in about 3,000.00USD/per ton, PVC thermal break barrier in 1,200.00USD per ton, PA66 thermal break barrier in 4,500.00USD per ton, Polyurethane injection adhesive in 3,605.00USD.

Aluminum density of 2.7g / cm3;PVC density of 1.4g / cm3; PA66 density of 1.3g / cm3;polyurethane density of 1.2 g / cm3.

The general internal and external wall thickness is 0.15 cm, and the middle thickness is 0.12 cm. The length of the profile is 600cm. The injection cavity is 0.8cm smaller than the strip feeding cavity.

Strip feeding cost information

Strip thickness 0.2cm, width 1.5cm, length 600cm

Each piece aluminum profile PVC strip feeding, (0.2×1.5) ×2(2 pieces)×600×1.4g/ cm3=504g=0.504kg

Each piece aluminum profile PVC strip feeding cost 0.504kg ×1.2USD/kg=0.61USD/Piece

Each piece aluminum profile PA66 strip feeding, (0.2×1.5) ×2(2 pieces)×600×1.3g/ cm3=468g=0.468kg

Each piece aluminum profile PA66 strip feeding cost 0.468kg ×4.5USD/kg=2.11USD/Piece

Injection polyurethane information cost:

Each piece aluminum profile polyurethane information

1.1cm ×0.8cm ×1.2g/cm3 ×600cm/piece=633.6g=0.6336kg/piece

Each piece aluminum profile polyurethane cost

0.6336kg/piece×3.605USD/kg=2.284USD/piece

Conclusion

The injection process and strip feeding process both have good thermal insulation properties, and it is the development direction of energy-saving aluminum alloy building materials. Our country clearly pointed out it is necessary to develop thermal break aluminum profiles.

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The difference between strip feeding and injection thermal break aluminum profile