Powder feeder with weighing system for powder mass flow control
Disk type powder feeder
The GTV PF 2/2 powder feeder is an advanced equipment based on the for 20 years well known PT Twin system. It has proved to be suitable and reliable in thermal spray applications, especially for powder flame, HVOF and plasma spraying. Additionally this feeder has gained high acceptance in laser technologies due to the high accuracy of powder feed rate, even at very low powder feed rate.
The special disk type feeding principle with sucking of powder in a carrier gas flow guarantees exact and reproducible powder feed rate. Thereby powder feed rate is linearly proportional to the feeder disc rotation velocity.
Standard equipment is delivered as so called stand-alone version, i.e. containing an own SPS and display. All relevant parameters (including feeder disc and mixer rotation velocity) are set and displayed by means of the Siemens display TP170 in the front part of the powder feeder. However, setting of parameters is also possible via the operator panel of according GTV thermal spray equipment. Additionally standard powder feeders feature an interface that permits control by an external robot.
The GTV powder feeder PF 2/2 imparts:
cabinet with keyboard
Siemens S7 SPS
Siemens Operating Panel TP 170 (colour display and touch screen)
2 volumetric flow meters for optical control of carrier gas flow
2 separately driven powder feeder units (hopper volumes 0.3 (for laser applications), 1.5 or 5.0 liters) with mixers; therefore possibility to spray mixed material coatings
option: hopper heating
option: mass flow control of carrier gas (PF MF 2/2)
option: powder feerd rate control based on permanent weighing of the hoppers
all kinds of special demands, e.g. possibility to vary powder feeder disc rotation velocity at a desired rate (for manufacturing of graded layers)
Of course, depending on customers wish also other powder feeders can be implemented in GTV installations, e.g.: