Double Rounded End Oil Catch Plate For Curved Overhead Conveyor

Hangzhou Ocean Industry Co., Ltd. is one of the most experienced manufacturers and suppliers of double rounded end oil catch plate for curved overhead conveyor in China. Welcome to wholesale customized double rounded end oil catch plate for curved overhead conveyor at competitive price from our factory. Good service and quality products are available.

On every QXG enclosed-track overhead conveyor circuit, the horizontal and vertical curves are where the chain runs under sustained lateral or vertical acceleration. Unlike the transition zone - where the chain is only beginning to enter the curve and centrifugal forces are ramping up - the body of the bend section is where centrifugal force reaches its full, steady-state magnitude and maintains it for the entire arc. This is the zone of maximum sustained oil shed, and it is the operational environment that the double rounded end oil catch plate is engineered to protect.

The double rounded end oil catch plate (also called a bend-section full-arc drip tray, curve-body oil collector, or dual-curved-end catch pan) is a formed steel or stainless steel tray whose entire body follows the arc of the bend track. Both ends of the plate are rounded - each matching the bend track radius - so the plate can be joined seamlessly to single rounded end transition plates at both the curve entry tangent and the curve exit tangent. The plate does not have any straight section; its full length is an arc segment, typically covering 45°, 90°, or 180° of the bend track's circumference, depending on the curve geometry and the modular panel size selected.

The engineering premise of the double rounded end plate is fundamentally different from both the straight end plate and the single rounded end transition plate. A straight end plate is designed for gravity-dominant oil capture: droplets fall vertically, and the plate's flat floor collects them. A single rounded end plate is designed for the transition burst: it handles the momentary spike in oil shed as the chain enters the curve. But the double rounded end plate is designed for sustained centrifugal oil capture: throughout the full arc, centrifugal acceleration continuously flings lubricant outward from the chain's pin-bushing interfaces and guide wheel bearings at a constant rate, and the plate's curved body must intercept this steady outward stream for the entire duration of curve traversal. This demands a plate with greater depth, stiffer side walls, and a curved drainage path that guides collected oil along the arc toward a discharge point without pooling at the curve's outer radius.

The oil-contamination challenge inside a bend section is qualitatively different from anything on a straight track. Understanding the physics reveals why a purpose-built full-arc plate is necessary rather than simply extending transition plates to cover the curve body:

Steady-state centrifugal acceleration. As the chain travels through a horizontal curve of radius R at speed v, every component experiences a sustained lateral acceleration of a = v²/R directed outward from the curve centre. For a QXG250 system running at 8 m/min through an R800 curve, this acceleration is approximately 0.013 m/s² - small compared to gravity, but sustained continuously for the entire arc. Over a 90° curve traversal that takes 15–20 seconds, this constant outward force progressively pumps lubricant out of pin-bushing clearances and guide wheel seals at a rate 3–5 times higher than the straight-section baseline drip rate.

Oil migration toward the outer radius. Inside the catch plate, collected oil does not sit still. Centrifugal acceleration acts on the pooled oil just as it acts on the chain, pushing the liquid toward the outer side wall of the curved tray. In a 90° curve, oil accumulates preferentially at the 45° position on the outer radius, creating a localised deep pool that can overflow the side wall if the plate is not deep enough or if the drainage path does not route oil toward a discharge port. A straight plate or transition plate installed inside a curve does not account for this outer-radius concentration and will overflow at the outer wall long before its total capacity is reached.

Curve-exit drip burst. When the chain exits the curve and returns to straight running, the sudden cessation of centrifugal force causes a momentary reversal: lubricant that had been pushed outward now flows back toward the pin-bushing centreline, and this redistribution releases a secondary drip burst at the curve exit tangent point. The double rounded end plate's exit-side curved terminus covers this exit burst zone, just as its entry-side terminus covers the entry burst. A plate with only one rounded end would leave the exit burst unprotected.

Vertical bend gravity-surge dynamics. In vertical curves (dips and rises), the chain's incline angle changes continuously through the arc. Lubricant inside each pin-bushing clearance flows downhill along the pin axis, and the flow direction reverses at the curve inflection point. This means the oil shed rate peaks not at the curve entry but at the inflection point - the middle of the arc. A double rounded end plate covering the full arc ensures this mid-arc inflection surge is captured, which a shorter transition plate terminated at the tangent point would miss entirely.

Production-line contamination audits consistently show that the bend section body - not the transition zone, and not the straight runs - accounts for the single highest density of oil-drip incidents per unit of track length. A 90° horizontal curve that represents only 5% of the total track length can generate 25–40% of the total oil-drip volume on the line. The double rounded end plate is the only catch-plate geometry that addresses this concentration directly, by providing full-arc coverage engineered for sustained centrifugal conditions.

The double rounded end oil catch plate is the most complex catch-plate type to manufacture, because its entire body is an arc segment rather than a straight section with a curved appendage. The forming process, material selection, and structural reinforcement all reflect the demands of full-arc deployment:

Material & Surface Protection

Full-Arc Body Geometry

Unlike straight end or single rounded end plates, which have a linear body section, the double rounded end plate's entire floor is a curved sheet that follows the bend track's arc. The plate is roll-formed to the specific bend radius using adjustable roll-forming tooling, ensuring the curvature is continuous and smooth with no flats or kinks along the arc. The U-channel side walls are formed simultaneously with the floor, so the entire cross-section maintains its shape around the curve. Both end terminations are cut square to the arc tangent, producing two matching curved-end profiles that can be joined to single rounded end transition plates or to adjacent double rounded end panels.

Modular Arc Panel System

For curves exceeding 90° (common in conveyor circuits with 180° return loops or compound directional changes), the catch plate is supplied as modular arc panels that bolt together at arc-segment joints. Each panel covers a standard arc segment (45° or 90°), and the joints between panels use the same flexible silicone gasket system used at the transition-to-bend interface. This modular approach allows any curve angle from 45° to 360° to be covered without custom tooling, and individual panels can be removed for cleaning or inspection without disassembling the entire curve coverage.

Mounting System

The double rounded end plate mounts to the bend track's support brackets at intervals along the arc. For a 90° panel, three mounting points are used: one at each tangent end (matching the single rounded end transition plate's tangent-point tabs) and one at the 45° midpoint of the arc. The midpoint bracket is critical - it resists the lateral force of centrifugally deflected oil striking the outer side wall, which would otherwise cause the plate to shift inward toward the chain path. M8 or M10 bolts with flat washers and nylon-insert lock nuts are used at all mounting points; no welding is required.

The double rounded end oil catch plate is supplied in configurations matched to each QXG chain series, bend-track radius, and required arc coverage angle. The following table covers the standard product range:

Note: When ordering, specify the chain series, bend-track radius, arc segment angle (45°/90°/180°), curve direction (horizontal-left, horizontal-right, vertical-up, vertical-down), and material. For curves with non-standard radii or arc angles, custom roll-forming is available with a 15–20 working day lead time. For compound curves (simultaneous horizontal and vertical curvature), a custom dual-plane plate can be engineered on request.

The double rounded end plate does not function in isolation - it is the central component of a three-plate system that provides continuous oil containment from the straight run, through the transition zone, across the full bend section, through the exit transition, and back to the straight run. Understanding how the three plate types divide this responsibility ensures correct system specification:

In a typical QXG250 conveyor circuit with eight 90° horizontal curves, the complete oil-containment system would comprise: 8 double rounded end bend-section plates (one per curve), 16 single rounded end transition plates (two per curve: entry and exit), and straight end plates covering the linear runs between curves. The double rounded end plate is the system's centrepiece - it handles the highest oil-shed density per unit length and is the only plate type engineered for sustained centrifugal conditions.

Full-arc roll-formed body. The entire plate body is roll-formed to the bend track radius, producing a continuous curved U-channel with no straight sections, no kinks, and no flats. This ensures the plate follows the track's arc precisely and provides uniform oil capture along the entire curve length, not just at the tangent points.

Asymmetric side-wall heights. The outer-radius side wall is 5 mm taller than the inner-radius wall, providing extra containment depth exactly where centrifugal force drives the oil pool. This asymmetry prevents overflow at the outer wall - the failure mode that would occur if both walls were the same height and the outer wall received the full centrifugal load.

Outer-wall longitudinal stiffening bead. A pressed longitudinal bead runs along the outer side wall at mid-height, increasing its resistance to the lateral oil-pressure load without adding material thickness. This bead prevents the outer wall from bowing inward under the sustained hydrostatic pressure of the centrifugally pooled oil, which would reduce the wall's effective containment height.

Modular arc-panel system. Standard 45°, 90°, and 180° arc panels can be bolted together to cover any curve angle from 45° to 360°. This modular approach eliminates the need for custom tooling on non-standard curve angles and allows individual panels to be removed for cleaning or inspection without disassembling the entire bend-section coverage.

Three-point arc mounting. A 90° panel is secured at three positions: entry tangent, 45° midpoint, and exit tangent. The midpoint bracket is the structural anchor that resists centrifugal oil pressure on the outer wall. This three-point system is more stable than the two-point (tangent-to-tangent) mounting used on transition plates, because the arc body is subject to distributed lateral loading rather than end-loading only.

Outer-wall drain port at centrifugal pool point. The drain port is located at the outer side wall at the 45° position (90° panel) or 90° position (180° panel) - the point of maximum oil accumulation under sustained centrifugal loading. This placement allows the pooled oil to discharge at the point where it naturally collects, rather than requiring the oil to flow along the arc to a remote drain location.

The double rounded end oil catch plate is designed for deployment in the same environmental conditions as the QXG enclosed-track conveyor bend sections it serves. The following parameters define its rated performance envelope:

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