Fluid sprinkling – spraying – and diffusing – With means fusing solid spray material at discharge means – Wire or rod type supply
Patent
1990-03-16
1991-12-24
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
With means fusing solid spray material at discharge means
Wire or rod type supply
239 79, 226187, B05C 504
Patent
active
050744690
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
The invention relates to a wire pistol comprising a wire feed mechanism including a wire feed pulley driven by a motor and a counter-pulley for biasing the wire into engagement with the feed pulley.
A wire pistol of this type is mainly employed in the so-called flame spraying operation. In this application the wire feed mechanism acts to convey the wire into a gas head having a spray nozzle. In the gas head, which is supplied with a combustible gas in combination with compressed air and oxygen, the combustion of the gas causes the wire material to melt, the molten wire material being sprayed and expelled through the nozzle together with the combusted gas.
Known wire pistols having a wire feed mechanism suffer from the disadvantage that the adaptation to wires of different diameters requires both the feed pulley and the counter-pulley to be exchanged. This exchange operation requires the housing of the wire pistol to be opened and thereafter to be closed again, and is therefore very time-consuming. This system moreover requires a set of pulleys to be always held in readiness for the exchange operation.
It is an object of the invention to provide a wire pistol of the type defined above, in which the adaptation to different wire diameters is simplified and does in particular not require the pistol housing to be opened and does not either require any sets of pulleys to be held in readiness for replacement.
This object is attained according to the invention by the provision that the axis of rotation of the counter-pulley or/and the axis of rotation of the feed pulley is/are adjustable over an adjustment range for adapting the feed mechanism to wires of different diameters.
Thanks to this solution according to the invention, the necessity of exchanging the feed pulley and the counter-pulley in response to changes of the wire diameter is eliminated, so that the effort for adapting the wire pistol to different wire diameters is reduced. In addition the solution according to the invention eliminates the necessity of holding pulley sets in readiness for replacement.
In an advantageous embodiment of the invention, a transmission may be provided for transmitting the rotation of the feed pulley to the counter-pulley, the transmission being suitably composed of respective gears concentrically connected to the feed pulley and the counter-pulley, respectively. The transmission of the rotation results in an increased reliability of the wire feed operation, since the positively driven counter-pulley itself contributes to the transport of the wire.
When employing two gears concentrically connected to the feed pulley and the counter-pulley, respectively,, the teeth of the gears are advantageously formed with the reference profile I according to DIN 3972 for a number of nine teeth. This configuration of the teeth permits the rotation to be transmitted in a slip-free and continuous manner within a wide adjustment range of the gear axes.
The counter-pulley may suitably be mounted on a bearing element connected by a hinged link to the wall of the housing provided for the wire pistol, and subjected to the action of a pressure engagement device operable to bias the wire into engagement with the feed pulley by way of the bearing element and the counter-pulley.
In a particularly suitable embodiment of the invention the bearing element may be formed as a balance beam carrying the counter-pulley and another counter-pulley for a detector pulley engaging the wire for detecting the wire feed rate. The detector pulley engaging the wire permits the actual value of the wire feed rate to be very accurately measured. This is an important requirement for an effective control of the feed rate.
A feed control, particularly a slippage control, can only be achieved by controlling the biasing force acting on the wire for engaging it with the feed pulley. This biasing force may for instance be varied by mounting the pressure engagement device, which may be formed as a pressure cylinder with a variable internal pressure, so as to be displ
REFERENCES:
patent: 1096857 (1914-05-01), Pederquist
patent: 1917523 (1933-07-01), Irons et al.
patent: 2059089 (1936-10-01), Clesi et al.
patent: 2091021 (1937-08-01), Stevens
patent: 2102395 (1937-12-01), Valentine et al.
patent: 2749176 (1956-06-01), Steyer
patent: 2769663 (1956-11-01), Jensen et al.
patent: 2856237 (1958-10-01), Monroe
patent: 3251341 (1966-05-01), Eburn, Jr. et al.
patent: 3657940 (1972-04-01), Wagner
Grimes E. T.
Ingham H. S.
Kashnikow Andres
The Perkin-Elmer Corporation
Trainor Christopher G.
LandOfFree
Wire pistol does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Wire pistol, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wire pistol will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-39087