The corners of aluminum windows are prone to water leakage during window water tightness testing and in practical life, and are also a weak link in the overall stability of windows. So applying glue to the corners is not only for sealing effect, but also an effective guarantee of corner strength. The area of the panels for opening the fan and fixing the unit is increasing, and the number of glass layers has also been upgraded from double glass single hollow to three glass two hollow. This has led to an increase in the weight of the window unit and higher requirements for diagonal strength testing. Therefore, effective angle gluing technology is becoming increasingly important. Effective corner gluing is reflected in the following aspects:

Reasonable use of internal corner code types: The extrusion hollow corner code needs to be designed with a matching guide plate structure, and the casting aluminum corner code needs to ensure the accuracy of the cavity size. The rationality of the flow channel design of the extrusion corner code requires quantitative comparison and verification of the amount of glue used.

The design concept of the injection flow channel: The starting point of the injection flow channel design is based on angular strength or sealing, while also considering the effectiveness of the flow channel design by increasing the amount of glue used. The flow channel design and gap allowance are based on different injection temperatures and the selection of glue types, and the fluidity and viscosity of the glue are different at different temperatures.

The selection of adhesive type, injection environment, and control of curing time: The choice of single component or two-component is based on the requirements of environmental temperature and curing time, and the final corner strength and sealing performance. In addition to the reason for the adhesive, the comprehensive rationality of corner code structure design and flow channel design also needs to be considered.

The combination of gluing and injection: The gluing process at the corner joint cannot be replaced by injection, and reasonable injection should not occur at the corner joint. The design of flat corner pieces: The gluing process for flat corner pieces is a point method, which plays a curing role on the inner side of the cantilever joint. Cost performance must be considered.

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