Powder Coating
The Powerline Powder Coating Unit allows the even distribution of adhesive powders onto substrates ready for laminating or sintering.
The powder is held in a hopper above the conveyor. This hopper has adjustable end dams allowing the powder to be scattered over various widths of substrate. If required, more dams can be added to allow multiple lanes of powder to be spread.
The powder in the hopper falls between the needles in the scatter roller. As the roller rotates, a doctor blade levels the powder with the top of the needles ensuring an even quantity of powder across the width of the coater. Powder contained in the roller rotates around until it meets the oscillating brush where it is cleaned out from between the needles. As the powder falls, there is a secondary oscillating sieve to further ensure even distribution of powder.
Powder Reservoir
Mounted above the machine centerline and holds the adhesive powder in a ready state for supply to the spreading equipment. A pneumatically operated levelling paddle (option) moves across the full width of the reservoir to ensure that the powder levels are always equal and to prevent coagulation and "bridging" build-ups in the reservoir. Upper and lower powder level sensors (option) are fitted to the reservoir to monitor either low powder levels or over filling.
Applicator Mechanism
A metal dispensing roller receives the adhesive powder equally across the full length of the roller. The powder is held in place by the needles on the surface of the roller and the volume of powder collected is governed by the rotational speed of the roller. A 0.75 kW inverter driven AC motor operates the dispensing roller and the rotation speed is directly controlled from the PLC computer unit. Adjustment (as a percentage) of the conveyor line speed through the PLC increases or decreases the volume of powder collected by the dispensing roller. The adhesive powder is removed from the dispensing roller by a reciprocating brush driven by a cam action and a 0.37kW AC motor. At the front and back of the powder reservoir and dispensing equipment are Plexiglas shields to retain the powder scattering onto the substrates and prevent dispersion from the immediate area.
Dedicated Conveyor(option)
A banded conveyor or PVC belt forms a link between the PTFE conveyors of the transporting system and is an incorporated component of the powder coating equipment. The bands revolve around driven grooved rollers that anchor the individual bands and prevent any tracking problems. Surplus powder that falls across the full width of the conveyor is able to fall between the individual bands of the conveyor into the powder recovery unit (option). An 0.375 kW, AC inverter drive motor is fitted to drive the conveyor and the speed of movement is controlled from the PLC in conjunction with the overall line speed.
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