JPS58174596A - Electrodeposition painting method - Google Patents

Abstract

PURPOSE:To eliminate the generation of an unpainted part on an object to be painted, in electrodeposition painting immersing the object to be painted suspended from a cross lever in an electrodeposition painting tank, by swinging the object to be painted by the cross lever. CONSTITUTION:An electrode plate 3 is immersed in an electrodeposition painting liquid within an electrodeposition painting tank 1 while an object W to be painted is suspended from a cross lever 6 by a chain 7 to carry out electrodeposition painting. In this case, both ends of the cross lever 6 are alternately raised or lowered to impart swinging motion to the object W to be painted in the tank 1. As the raising and lowering means, for example, cylinders 4 are provided to both sides of the tank 1 in a vertical axial direction while receivers 5 for both ends of the cross lever 6 are provided to the ends of the piston levers thereof. By this method, the generation of an unpainted part due to a conventionally generated air pocket is eliminated by the swinging movement of the object to be painted and the touch-up work of the unpainted part after painting can be avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrodeposition coating method, and an object thereof is to coat an object immersed in an electrodeposition coating solution without leaving any unpainted areas.

Conventionally, in the case of cationic electrodeposition, the electrodeposition coating method involves suspending the horizontal rod f to be coated and immersing it in the electrodeposition coating liquid in the electrodeposition coating tank containing the electrode plate. In the case of electro-deposition using a kid electrode plate, it is carried out by applying electricity to the object to be coated. In this case, since the object to be coated is in a stationary state, if the object to be coated has an uneven shape, air pockets are generated in certain parts, and there is a problem that unpainted areas are generated due to air pockets. This problem occurs particularly when a long object to be coated is electrodeposited by placing it on a gentle slope using a shallow paddle. Therefore, in the past, it was necessary to touch up the unpainted areas after electrodeposition coating.

The invention solves the above-mentioned conventional problems, and its feature is that the support members that support both ends of the horizontal rod on which the object to be coated is suspended are moved up and down alternately, and the object is immersed in the electrodeposition coating liquid. The method is to apply a rocking motion to the object to be coated, and to perform electrodeposition.

Embodiments of the present invention will be described below with reference to the drawings. Reference numeral 1 designates an electrodeposition coating tank in which an electrodeposition coating liquid 2 is stored and an electrode plate 3 is inserted therein. Reference numeral 6 denotes a horizontal rod, from which the object W to be coated is suspended by a chain 7 or the like.

Uniquely, both ends of the horizontal rod 6 are moved up and down alternately to give the object to be coated WK a swinging motion within the electrodeposition coating tank 1. As shown in the figure, cylinders 4 are installed in the vertical axis direction on both sides of the electrocoating tank 1, and a platform 5 is installed at both ends of the horizontal rod 6 at the end of the piston rod. be.

As another embodiment, although not shown, the object of the present invention can be achieved by alternately moving a hoist that suspends both ends of the horizontal rod 6 up and down.

Since the present invention is as described above, by alternately raising and lowering both ends of the horizontal rod 6 without applying electricity during electrodeposition, the rocking movement of the object WFi immersed in the electrodeposition coating tank 1 is controlled. 4 can be obtained. Therefore, by moving air during tN, the entire surface of the object W to be coated is reliably brought into contact with the electrocoating liquid 2f without stagnation in a certain area, and the electrocoating apparatus is removed without leaving any uncoated areas. It can be done.

Therefore, according to the uninvented method, it is possible to eliminate the occurrence of uncoated parts due to the uncoated area that has conventionally occurred due to rocking of the object to be coated using a simple method that has not been conceived of before, and This has the remarkable effect of omitting the work of gluing and cleaning unpainted areas after painting.

[Brief explanation of the drawing]

The drawing is a sectional view of an electrodeposition coating apparatus showing an embodiment of the method of the present invention. 1--Electrodeposition coating tank, 2--Electrodeposition coating liquid, 3--Electrode plate, 4--Cylinder, 5--Base is stand, 6--Horizontal rod, 7-- Chain, W...Object to be coated.

Claims (1)

[Claims] In electrodeposition coating in which a workpiece suspended from a horizontal rod is immersed in an electrodeposition coating tank, both ends of the horizontal rod are alternately raised and lowered,
An electrodeposition coating method characterized by applying an oscillating motion to an object to be coated in an electrodeposition coating tank to perform electrodeposition coating.