Downpipe forming machine

The downpipe forming machine is a specialized cold bending equipment used to produce the core components of building roof drainage systems - downpipes (also known as rainwater pipes, drainage pipes). It continuously forms metal coils such as galvanized steel plates, color steel plates, or aluminum coils into specific shapes and sizes of downpipes through cold bending and rolling processes.

What is a downspout?

A downspout is a vertical pipe installed on the exterior wall of a building, used to systematically direct rainwater collected by roof rainwater collectors to the ground or underground drainage system.

Common cross-sectional shapes:

Circular downspout: Classic style, good drainage performance, widely used.

Square/rectangular downspouts: more modern and decorative, can better integrate with building facades.

K-shaped downspout (common in Europe and America): The back is flat, with decorative protrusions on the front, which is classical and beautiful.

A fully automatic downspout forming production line typically includes:

Material rack (uncoiler):

Used for carrying and unfolding metal raw material coils.

Leveling device:

Eliminating the original bending stress of the coil and ensuring that the strip entering the forming machine is straight is the key to ensuring that the downpipe is straight and not twisted.

Molding host (core part):

Composed of multiple (usually 10-18) high-precision forming rolls.

The rolling mill is precisely designed based on the shape of the target pipe (circular, square, etc.), and each rolling mill performs a small, progressive bending of the strip in one step.

Core action: Gradually curl the flat plate and finally pass it through the closing roller to tightly bite the seam, forming a complete pipeline.

Fixed length cutting system:

When the continuously formed downspout reaches the preset length, precise cutting is performed.

Usually hydraulic cutting or chip free flying saw is used. Flying saw cutting can obtain smooth and burr free ports, resulting in a better appearance.

Electric control system:

Based on PLC (Programmable Logic Controller) and touch screen as the core.

Function: Control the operation of the entire line, set parameters such as pipe length, production speed, quantity, etc., to achieve automated production.