Bending uPVC profiles involves a specialized process that requires specific equipment and techniques to ensure the profiles maintain their structural integrity and desired shape. Here are the detailed steps and methods based on the provided sources.
Heating and Softening
- The uPVC profile is heated to make it pliable. This can be done using different methods such as hot oil systems or ovens. The typical temperature for heating uPVC profiles is around 130°C .
- For example, Universal Arches uses an oven to heat the profile along with nylon formers that help maintain the shape during the bending process.
Using Profile Bending Machines Process
- The heated uPVC profile is then placed into a profile bending machine. These machines apply force to bend the profile into the desired shape. The profile is inserted between rolls that move to create the deformation needed for bending .
- ArcOframe describes using profile bending machines to create round, arched, and circular uPVC profiles by applying force through rolls .
Forming and Clamping
- Once the profile is heated and pliable, it is curved around a jig or formers to achieve the desired shape. The profile is then clamped into place and left to cool, allowing the bend to set .
- Universal Arches mentions using nylon formers that heat up along with the uPVC profile, which are then curved around the appropriate jig and clamped until the bend sets .
Cooling
After bending, the profile is allowed to cool while clamped in the desired shape. This cooling process helps the profile retain its new shape permanently .
Quality Control
Throughout the process, stringent quality control measures are implemented to ensure the profiles meet the required standards and specifications. This includes checking for any deformations or defects that may have occurred during the bending process .
Specialized Techniques
- Some companies, like Force 8, use unique methods such as a single length profile bending system, which avoids welding and ensures a continuous, seamless bend .
- Universal Arches has developed advanced bending technology in collaboration with Liverpool University, which allows for precise and complex bends.
In summary, bending uPVC profiles involves heating the profile to make it pliable, using profile bending machines to apply force and create the desired shape, clamping the profile to set the bend, and implementing quality control measures to ensure the final product meets specifications. This process requires specialized equipment and expertise to achieve high-quality, durable bends in uPVC profiles.
