DE3040119A1 - METHOD AND DEVICE FOR REMOVING PAINT LAYERS - Google Patents

Description

MESSER GRIESHEIM GMBH MG 1250

Keyword: Vibration ^paint stripping EM 927

Inventor: P. Grund Folder: A

Method and device for removing paint layers

The invention relates to a method for removing paint layers, for separating composite materials and for deburring, in which the workpieces or material parts that are elastic at room temperature are replaced by a low-boiling point liquefied gas become embrittled.

From DE-OS 23 27 784 a method for deburring objects made of normally elastic material by means of cryogenic temperatures is known, in which the embrittled objects are subjected to a vertical reciprocating movement in a vibrating container. The reciprocating motion will
generated by a crank mechanism. With this method, only workpieces with a low weight can be machined, since the heavy workpieces that occur

30401

Forces can no longer be controlled. For the same reason, the maximum workpiece speeds that can be achieved with this method are relatively low.
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The invention is based on the object of creating a method of the type mentioned which allows to handle workpieces with a very high weight and the workpieces to extremely high maximum speeds to accelerate.

Based on what is considered in the preamble of claim 1 In the prior art, this object is achieved according to the invention with that in the characterizing part of claim 1 specified features.

Advantageous further developments of the invention are specified in the subclaims.

The inventive arrangement of a compensating mass that oscillates offset by 180 ° to the oscillating container makes it possible to handle even workpieces with a weight of several tons. This can ζ.-B. au be scrapping cars. It is only necessary to make the balancing mass as large as the mass of the vibrating container with the workpiece to be machined. Since the oscillating tank and the balancing mass oscillate horizontally, the influence of gravity is eliminated. The method according to the invention is carried out under normal circumstances, for example for deburring plastic articles or for removing layers of laak from lacquer hangers from endless lacquer lines with a crank drive as the drive. The workpieces can be cooled by a low-boiling liquefied gas , preferably nitrogen, before they are put into the

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Vibrating containers are placed. The liquid nitrogen can also be supplied during the oscillation. In addition, an additive can be added to the oscillating container.
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With extreme requirements, for example when very heavy workpieces are run at very high maximum speeds need to be accelerated to a disassembly of the composite material To achieve this, a crank drive is less suitable as a drive. According to the invention for such A linear drive is preferred. This means that even many workpieces weighing tons can be run at maximum speeds can be accelerated by up to 80 m / s. In this case, the balancing mass oscillates on the Machine chassis in the opposite direction. Except for the already mentioned cars to be scrapped, Such extreme conditions exist, for example when processing cable scrap. Namely, it prepares great difficulty in removing the insulation from the cables. With good effect, this is done by one exposing the embrittled cable scrap to an explosive detonation in a blasting chamber. With the The high maximum speeds that can be achieved by the method according to the invention can be expensive Avoid action.

An embodiment of the invention is based on the accompanying drawings.

Show it:

1 shows a cross section through a device with a crank drive for carrying out the method according to the invention ^{; ;}

Fig.2 is a plan view of Fig.1.

The device shown in FIGS. 1 and 2 serves to remove layers of paint from painting hangers 1 " which are taken from an immersion bath (not shown) with liquid nitrogen. The painting hangers 1 are placed in a swinging container 2 designed as a trough. * The swinging container 2 can be moved horizontally on the rails 3. A slider crank drive 4, the output of which is designed as a crankshaft 5, is used for the drive. The oscillating container 2 is connected in an articulated manner by a first coupling 6 to a crank of the crankshaft 5 which forms a crank arm 7. The crank arm 7 is offset by 100 °, the crank arm 8, also a crank of the crankshaft 5, opposite. According to the invention, the crank alarm 8 is articulated to a balancing mass 10 by a second coupling 9. The balancing mass 10 can be moved horizontally on rails 11.

The masses of the filled vibrating container 2 and the balancing mass 10 are roughly the same size. Since in this way the forces occurring in the device largely are compensated, the filled oscillating container 2 can have a large weight. They can do the same Crank arms 7 and 8 and thus the maximum speed of the vibrating container 2 can be made large. The de-icing and the deburring effect of the device according to the invention is therefore much greater than with previous ones Fixtures of this kind. The effect can still be increased

^ O gert by adding Bischlag to the oscillating tank 2. In order to avoid noise nuisance, the The entire system is surrounded by sound insulation, which is not shown in the drawing.

35 _{ffm. F} 06.10.80 Ba / Hi

ORIGINAL INSPECTED

Claims (5)

3040113 Claims '■ 1 Μ / Process for removing paint layers for separating composite materials and for deburring, in which the elastic workpieces or material parts are embrittled by a low-boiling liquefied gas and subjected to a violent oscillating movement in a vibrating container,
characterized by the following features: 10 a) the direction of the oscillating movement is horizontal, b) the amplitude of the oscillating movement is 0.04 to 100 m, c) the frequency of the oscillating movement is 5 to 300 min " ¹ , d) the workpiece weights are 0.01 to 10,000 kg 2. The method according to claim 1,
characterized, that the workpieces are accelerated to maximum speeds of up to 80 m / s. 3. Device for performing the method according to Claim 1, essentially consisting of a vibrating container, which by means of a slider crank drive can be set in an oscillating motion, characterized by the following features: a) the oscillating container (2) can be moved horizontally on rails (3), b) the crank mechanism (4) has two opposing crank arms (7, 8), c) the oscillating tank is connected to a first coupling (6) articulated to a crank arm (7) of the slider crank drive, d) the other crank arm (8) is articulated with a second coupling (9) to a balancing mass (10) connected, e) the balancing mass can be moved horizontally on rails (11). 4. Device for performing the method according to claim 1 or 2, essentially consisting of a vibrating container that is set in an oscillating motion can, characterized by the following features: a) the oscillating tank can be moved horizontally, b) the movement of the vibrating tank is carried out by a linear drive, c) the oscillating tank is electrical or mechanical with a horizontally movable balancing weight tied together, d) the balancing mass moves against the direction of movement of the oscillating tank. O Γ] Λ Π 1 1 Q - 3 - 5. Apparatus according to claim 3 or 4, characterized, that the oscillating container is designed as a trough which is moved transversely to its longitudinal axis. 5 Ff m., 06.10.80 Ba / Hi EM 10