KR950030745A - Low Pressure Plasma Spray Coating System - Google Patents

Abstract

The present invention improves the characteristics of plasma generated during atmospheric plasma spraying by minimizing vacuum plasma spraying operations and minimizes the change in film properties and film quality caused by the incorporation of air in the main surface, thereby producing high quality metal and ceramic films of high quality. The low pressure plasma spraying system of the present invention provides a low pressure plasma spraying coating system of the present invention having an independent double-walled vacuum air, dust collection effect, and cooling effect that can be sprayed in an airtight state by putting necessary spraying equipment inside. Heat exchangers with sufficient cooling capacity, dust collectors for filtering out unencapsulated powder, vacuum pumps to maintain and maintain a spray atmosphere, and low pressure plasma sprayers for low pressure spraying operations, vacuum and Double wall motor under high temperature A sprayed motor that can be used to move the sprayed plasma sprayer up and down and left and right by a motor protected by a cooling tube, a powder feeder adapted to be used at low pressure for atmospheric pressure, and control and control of peripheral devices. It consists of a low pressure spray system control and control system that is centralized with the equipment. Each of these elements is properly connected and arranged so that optimal spraying work can be performed together with an atmospheric pressure plasma facility. By modifying at least some devices and adding only a vacuum vessel and an exhaust machine, it is possible to give work flexibility at low cost and according to research and development or production purposes. Film production of high performance polyfunctional alloy which is difficult It will have to function.

Description

Low Pressure Plasma Spray Coating System

Since this is an open matter, no full text was included.

1 is a configuration diagram of a low pressure plasma spray system, FIG. 2 is a side view and a front view of a vacuum container, and FIG. 3 is a layout view of injection ports of various supply lines, (a) is an injection hole behind the upper part of the vacuum container, (b) is a lower injection hole behind the vacuum container, 4 is a cross-sectional view of a low pressure plasma sprayer power supply inlet, FIG. 5 is a front view and a plan view of a heat exchanger and a dust collector, FIG. 6 is a cooling diagram of a low pressure spray system cooling system, and FIG. Measured at 2/3 of the diameter when using 300 kW sprayers), FIG. 8 is a low pressure plasma spray design, FIG. 9 is a spray feeder and a base work swivel, and FIG. 10 is a working principle of a powder feeder adapted for low pressure use. 11 is a schematic diagram of a low pressure spray system control controller, and FIG. 12 is a front view of a low pressure spray system control controller.

Claims (7)

Atmospheric pressure plasma spray system supply system comprising the power supply and cooling water supply (1), powder supply (2), gas supply device (3), air supply and pressurization device (4), and base material surface pretreatment device (5) In the plasma spraying system provided with the spraying-control control panel 6 as a control regulator, the heat exchanger 11 and the dust collector 12 are connected between the vacuum vessel 8 and the vacuum pump 9, and the vacuum Low pressure characterized by including a vacuum gauge and a low pressure plasma spray system control regulator 7 so that the low-pressure plasma spraying machine 13, the spraying machine conveying device 14, and the base material work machine 15 can be installed in the container 8. Plasma spraying system. 2. The vacuum container (8) according to claim 1, wherein the vacuum container (8) has a discharge port (19) at the bottom thereof, and the bottom of the container, the opening and closing door and the container body has an independent double wall structure so that the coolant can flow between the walls. Low pressure plasma spraying system. 2. The heat exchanger (11) according to claim 1, wherein the heat exchanger (11) is separated from a center of the inside thereof, and is connected to a top and bottom plate having a plurality of stainless rod holes having a predetermined outer diameter on both sides thereof, and exhausted into the stainless rod. Low pressure plasma spraying system characterized by allowing gas to flow while cooling water flows around the stencil to cool the gas. The low pressure plasma according to claim 1, wherein the cooling water and the injection gas flow portion of the low pressure plasma sprayer 13 are completely sealed to the outside, and a powder injection hole 59 is formed in the nozzle fixing portion 37. Spray system. The motor cooling cylinder of the double wall structure is mounted in the drive motors 49 and 50 of the thermal sprayer conveying apparatus 14, and if necessary, it is possible to carry out the air cooling outside the vacuum vessel 8. Low pressure plasma spray system, characterized in that configured to be pressurized by injection. According to claim 1, wherein the powder feeder 2 is an argon pressurized cylinder 65 with a flow meter 60 is connected to the powder container 61, the blocking valve between the powder container 61 and the vacuum container (8) Consists of a hose with a (62), the opening and closing of the shut-off valve 62 and the adjustment of the flow meter 60, the degree of pressurization of the powder container 61 and the flow rate and powder injection amount injected into the powder container 61 Low pressure plasma spray system characterized by controlled load The method of claim 1, wherein the low-pressure plasma spray system control control system (7) is configured to centralize the control control of the plasma flame-forming portion, the thermal sprayer transfer portion, the vacuum and temperature associated portion and other peripheral devices. Low pressure plasma thermal spray system. ※ Note: This is to be disclosed by the original application.