Car body surface treatment device

Coating apparatus – Immersion or work-confined pool type – With means for moving work through – into or out of pool

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Details

118409, 118426, 118428, 118500, 198403, B05C 302

Patent

active

057256691

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

The invention relates to a surface treatment device for one or more car bodies, having a rotating device, to which at least one car body mounted on a loading carriage is detachably connectable and which dips the car body into a treatment bath by rotation and in turn takes it out of said bath by a rotation, as well as having conveyors for carrying the loading carriage on to or away from said rotating device.
A device for the surface treatment of car bodies, which are dipped by rotation into a treatment bath and are taken out of same by counter-rotation, is known from GB 2 229 381. In this known device, a car body is securely connected to a loading pallet. This unit composed of a loading pallet and car body mounted thereon is fitted on to a roller carriage. This roller carriage is equipped with non-driven rollers which enable a displacement to the side of the car body's longitudinal axis. By means of such a non-driven roller carriage, the loading pallet is conveyed from the treatment bath to other processing stations.
The entire composite structure, consisting of the car body, loading pallet and roller carriage, is pushed on to a mount which is attached above each treatment bath. This mount has a rotation axis perpendicular to the car body's longitudinal axis or parallel to the direction of conveyance. By rotation around the rotation axis through 180.degree., the entire composite structure of car body, loading pallet and roller carriage can now be dipped into the treatment bath. During the immersion operation, his mount and the unit of car body, loading pallet and roller carriage are connected together by means of locking pins.
A conveyor belt extending across several treatment stations and their treatment tanks is used to transport the car bodies or roller carriages. These treatment stations are laterally adjacent. The conveyor belt transports the roller carriages, on which a loading pallet with its car body is respectively fitted, from treatment tank to treatment tank. Vertically positioned pallet pieces, which make contact with the roller carriage, are fitted on the conveyor belt for this purpose.
This type of device for the introduction of a car body enjoys the advantage that a simple mechanism is used to minimize the extent to which the treatment fluid in the treatment bath is spilled, in that the car body is rotated into the treatment bath via the front or the rear side. During the rotation process, the quantity of air entrapped within the car body is continuously able to escape from the car body's windows.
This device's structure is relatively complex and only suitable for small-scale systems. When a car body is immersed, the next body must wait until the first body's process time has elapsed. This process time amounts to as much as three minutes in the case of individual process stages and is even longer in the case of cathodic dip painting.
DE 43 04 145 C1 describes a device of the named class in which a car body is also dipped into a treatment bath by means of rotation. In the case of the immersed car body, it is also possible for another car body to be fitted on to this rotating device and to be detachably connected or for it to be able to pass over the rotating device.
In the known device, a loading carriage is used to receive and fix the car body. The loading carriage and car body are pushed on to the rotating device by means of one or more driven rollers and are detachably connected thereto by means of fixing devices. The rotating device is attached above the treatment bath and comprises a rotation axis transverse to the direction of conveyance of the car bodies. The car body is now introduced by rotating the rotating device in such a manner that the car body is dipped via its front or rear side into the treatment bath. One or more of the rollers on the upper and lower sides of the rotating device are respectively driven so that the loading carriages and car bodies can be passed along.
This design suffers from the disadvantage that the rotating device comprises a pl

REFERENCES:
patent: 2598163 (1952-05-01), Halls
Patent Abstracts of Japan vol. 9, No. 278 (C-312), Nov. 6, 1985 & JP, 60 125 275, Jul. 4, 1985.

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