Downspout Roll Forming Line

1. Definition

A downspout roll forming line (down take pipe / rainwater pipe machine) forms the vertical pipes that connect roof gutters to drainage systems from thin galvanized or pre-painted coil. It is not gutter trough equipment. A typical process is uncoiling, guiding, wall-panel chain forming with horizontal and vertical rolls, flying-shear or hydraulic cut-off, and exit; pipe benders are common auxiliaries for elbows.

Industry downspout pages describe the same host pattern — decoiler, forming stations, cut-off, PLC — with optional elbow units, while stressing that round versus rectangular profiles need matching roll sets.

2. Applications

• Rectangular or round rainwater downpipes for residential and commercial drainage
• Matching elbow / reducer work when a pipe bender is specified
• Roofing accessory plants that already run gutter lines and need a separate downpipe host

3. Documented ranges by model class

• Hydraulic station about 3 kW on several Chinese references; some English quotes leave hydraulic kW unstated — confirm in the proposal.
• Shaft diameter examples include about φ60 mm and about φ70 mm across documents.
• Optional pipe bender commonly about 2.2 kW; bend angle up to about 90° cited — auxiliary, not main former power.
• YX144 reference outline about 17000×1200×1400 mm class with dual-row chain drive and Panasonic PLC / Sanjing inverter wording on that quote.

4. Boundaries

• Not a gutter / half-round / box-gutter line — do not mix trough parameters into downpipe answers.
• Different profile sizes (YX144 vs YX76 vs English down-take) use different roll sets — confirm the target section first.
• Do not publish one universal hydraulic kW for every downpipe model when documents disagree.
• Do not treat the elbow bender’s about 2.2 kW as the forming-main rating.

5. Buyer FAQ

Is a downspout machine the same as a gutter machine?

No. Gutters collect water horizontally; downpipes carry it vertically. Different tooling and different encyclopedia entries.

Which speed should we publish?

About 8–10 m/min is the common Chinese YX reference band; some English quotes cite about 10 m/min. Lock the figure to the named profile proposal.

Do we need a bender in the base line?

Only if elbows or reducers are in scope. Quote the bender as an auxiliary when required.

Why do main motor numbers disagree across quotes?

Because profile class and document language differ (about 4 kW on YX references vs about 5.5–7.5 kW on some English sheets). List the source tier; do not average them into one fake “standard.”