What impact will the bending deformation of rigid PVC profiles have on their usage?

What impact will the bending deformation of rigid PVC profiles have on their usage?

The straightness of extruded rigid PVC profiles is an important indicator for evaluating product quality. According to GB/T 8814-2000, when the bending amount of the main special profiles (sashes, frames, and posts) of doors and windows exceeds 1mm/m, and the bending amount of the window screens exceeds 2mm/m, the product is considered Exceeding the bending index will directly affect the usage function and effect of the profiles： 
①It increases the difficulty of welding between the profiles and affects the welding quality. When the bending indicators of the main profiles of the doors and windows exceed the standard, it may cause the welding surfaces of each component to fail to achieve good contact during the welding process, thereby reducing the welding strength. Moreover, if the surface in contact with the welding machine worktable is not flat due to bending, it will also cause the profiles to fail to be accurately positioned during the welding process, thereby affecting the welding quality. 
② Affects the functional use. When the auxiliary profile is severely bent, it often leads to a deterioration in the assembly quality between the auxiliary profile and the main profile. For instance, if there is a significant bend on one side of the trim strip, a gap will occur at the joint between the trim strip and the main profile during assembly, seriously affecting the appearance. Moreover, if the main profile is severely bent, such as when the push-pull frame exceeds the standard, it will affect the sliding of the push-pull window on the frame, and even prevent it from being used normally. 
③ Affects the installation of hardware accessories. Excessive bending of the main profile will make it difficult to install the steel liner, and even result in the inability to install. Moreover, the installation of hardware components such as connecting rods and locking mechanisms will also be greatly affected.
Top
Inquiry
Inquiry