SU1033581A2 - Apparatus for electrolytic deposition of coatings - Google Patents

Abstract

DEVICE FOR ELECTROLYTIC APPLICATION COATING on author. St. No. 616349 / about tl and ch and y; with the fact that / with the aim of monitoring ravU / Voo e // b ff / fe / f / f7 /) O i // 77 (r3f / /. / Numbering of coatings, reducing energy consumption and increasing productivity by adjusting the electrolyte volume in the bath, it is equipped with a cathode height sensor and an electrolyte volume control system containing an electrolyte level sensor, a control unit, additional capacity and actuators for electrolyte drain and supply, and ONE of the unit outputs control connected to one of the inputs of the switch. (L with oo 00 SP CX)

Description

The invention relates to electroplating and can be used to increase the uniformity of coatings and reduce the cost of energy resources in the process control system of the electroplating industry. . According to the main auth. No. 616349, an electrolytic coating device is known that contains a galvanic bath, a cathode, an anode in the form of electrically isolated sites, a current density sensor / average current density detection unit, a switch, power sources, and an anode current source plots consisting of series-connected divider-15 nodes and a node of pulse-width converters, and the inputs of the duty cycle of the currents of the anode pads are connected to current density sensors and to the detection unit However, the device does not provide uniform coverage of the cathode with erf) end sides, which may be 25 caused by a change in the height of the cathode and concentration of the electric field lines in these areas, which in turn leads to the formation of tan or

. 30 dendrites, since the uniform distribution of the metal throughout the cathode will be only in the case when the level of electrolyte in the bath does not exceed the height of the self-cathode.

In addition, the absence in a known device of the possibility of providing an electrolyte level equal to the height of the cathode itself leads to an over expenditure of energy resources to maintain, if necessary, 40 (for example / in an anodizing bath in chromic acid) temperature conditions. .

Finally, the inability to determine the height of the cathode in the device leads to the fact that the use of excess anode pads is not excluded, since the current density sensors, the output signals of which are proportional to the local current density of the bath / fix This leads to the formation of sunburns and dendrites, which is explained by the curvature of the electric field lines due to their concentration at the edges of the cathode.

The aim of the invention is to increase the uniformity of the coatings, reduce energy consumption and increase productivity by adjusting 60 the volume of electrolyte in the bath.

This goal is achieved by the fact that the device for electrolytic coating is equipped with a sensor for determining the height of the cathode and

The topic of electrolyte volume control contains an electrolyte level sensor, a control unit, additional capacity and actuators for electrolyte drain and supply, one of the outputs of the control unit is connected to one of the switch inputs.

The drawing shows the structural scheme of the proposed device.

The device contains an anode f in the form of electrically isolated plots, current density sensors 2 located in the electroplating bath 3 and connected to block 4 of the current ratio of the anode pads and block 5 for determining the average current density, the output of which is connected to block 4 of the current ratio of the anode pads The main unit of the series-connected separating links and the node 7 are pulse-width converters, the output of which is connected to the switch 8 connected to the anode 1 electrically isolated between themselves , each of which corresponds to a specific current density sensor 2, to the output terminal of the power source 9, the second terminal of which is connected to the cathode 10 equipped with the cathode height sensor 11, and to one of the outputs of the control unit 12, the other two outputs of which are connected to the executive the mechanism 13 controlling the discharge of electrolyte into the additional tank 14 and with the actuators 15 and 16, controlling the supply of electrolyte from this tank, and the sensor 17 of the electrolyte level is connected to the input of the control unit 13. In the additional tank 14, the same temperature is maintained as in the main bath 3.

. The device works as follows.

. Before the start of the coating process, when the parts of the cathode on the suspension are hung, their height is determined by moving the sensor 11 for determining the height of the cathode along the edge of the suspension (not shown). In the process of lowering the cathode, the height of which is less than the height of the anode 1, or by increasing the electrolyte level: in the bath after the cathode is lowered, the cathode height sensor 11 is lower than the electrolyte level sensor 17, then it triggers after the arrival of the signal .. {the diagram dashed line) on the loading of the bath in the control unit 12 of the actuator 13 for controlling the electrolyte drain. The electrolyte from the galvanic bath 3 enters the additional tank 14 up to those. until the cathode height sensor 11 is on

Claims (1)

DEVICE FOR ELECTROLYTIC COATING according to ed. St. No. 616349, the fact that, in order to increase the uniformity of coatings, reduce energy consumption and increase productivity by adjusting the volume of the electrolyte in the bath, it is equipped with a sensor for determining the height of the cathode and a system for controlling the volume of the electrolyte comprising an electrolyte level sensor, a control unit, additional capacity and actuators for draining and supplying electrolyte, moreover, one of the outputs of the control unit is connected to one of the inputs of the switch. SU ,, 1033581> I