CN86107427A

CN86107427A - Stop the method and apparatus of suspended particle from falling and the annealing device that continous way is coated with interior film device

Info

Publication number: CN86107427A
Application number: CN198686107427A
Authority: CN
Inventors: 哈迪·P·韦斯
Original assignee: Individual
Current assignee: Individual
Priority date: 1985-10-29
Filing date: 1986-10-26
Publication date: 1987-04-29
Also published as: JPS62102853A; EP0224034A1

Abstract

When being coated with inner membrance such as tin can; in the coat heat treatment process after coating applies; on the radiating surface that stops coating suspension particle or droplet to drop on will to keep clean heat radiator (51), need be blown into gas in large area, therefore be provided with large-area spray nozzle device (55).It has nozzle seam (59 or 61).The input nozzle device (55) of gas is undertaken by passage (45).Spray nozzle device this moment (55) also plays the heat reflector (each label sees also accompanying drawing 5) of radiator (51) simultaneously.

Description

Stop the method and apparatus of suspended particle from falling and the annealing device that continous way is coated with interior film device

The present invention relates to a kind ofly stop suspended particulate or microactuator suspension to be dropped in relevant with it should to keep peace and quiet lip-deep method along what a dimensional directions was extended at least; relate to a kind of relevant device in addition; this method or device are coated with the application on the annealing device of inner membrance (mainly being partly to be coated with inner membrance to its longitudinal seam) at cylinder (as tin can), and be used for cylinder (as tin can) continous way be coated with in the annealing device of film device.

In the coating processes of bisque or enamelled coating, for example with powdery, droplets or liquid coating where necessary by means of electrostatic coating on workpiece, after coating, want heating coating usually, so that particles coalesce or make liquid coating be dried to the seam of a sealing.Establish thermal source in coated areas for this reason.Owing to can not prevent fully that clagging from getting bad (when the thermal treatment zone is directly installed on coated areas), or coating enters thermal source district (as infrared radiator) by coated areas and when dropping on above it, radiating surface is polluted, form sclerderm there after coating is toasted.

The objective of the invention is to propose the described at the beginning the sort of method of this paper, making at least can be not contaminated owing to falling suspended particulate or droplet at the clean surface of a dimensional directions extension.

The method that reaches this purpose above this surface by large-area be blown into gas and/or siphon away gas produce one air-flow.

Therefore as seen, keep clean surface to form one deck flowing gas, make to particle that falls or droplet to be pulled away in the past at the arrival clean surface.For the less clean surface of area need only air blast in case particle or droplet deposition, miss one's aim but do like this for the bigger clean scope of area.Because at this moment the turbulent flow that is produced may prevent deposition among a small circle, yet has promoted deposition just at its adjacent region.

If clean surface is the radiating surface of heat radiator, then top said air-flow in this surface can bring a problem, has promptly reduced the efficient of radiator therefrom, because this surface is cooled off by this air-flow under the situation of not taking other measure.

For preventing this point, we advise that throughput in this case is chosen on the order of magnitude that makes the free convection that heat radiator works, or this heats in periodic duty by means of heat radiator to make gas.The enforcement of a kind of scheme in back is by making gas system flow through a well insulated in periodic duty, and additionally heating is there in case of necessity taken away heat by air-flow preventing from radiator.In the order of magnitude scope of free convection, the loss in efficiency of radiator is controlled within the insignificant limit by the design throughput.

Be blown into and sucking-off for large-area gas, hour face a problem that relates to blowing nozzle and vacuum noz(zle) configuration aspects, especially when for example people want when using heat radiator to produce desired air-flow with as far as possible little gas flow in flowing velocity.The nozzle of set spatial spread must have little diameter, and this at first expects designing long slit injector, but desired precision and length are difficult to guarantee.So people advise that further being blown into sucking-off of gas undertaken by the many discontinuous place that is located in this surface in-scope, this implements much easier than above-mentioned slit injector.

The feature of carrying the said structure of purpose for reaching is, is provided with a malleation air supply channel or negative inspiratory pressure passage in the zone at this place, surface at least, and the spray nozzle device of an extension is arranged, and a large amount of discontinuous through holes are preferably arranged.

By making a fixed pressure distribution is basically arranged, gas is flowed out in uniform way by passage along spray nozzle device.By means of much discontinuous, can be tiny especially before through hole, have gas in a small amount just can should keep clean surface form enough air-flows.

Spray nozzle device is the metal structure by forming after with the enterprising electroplating of the negative template of many pins preferably.

The structure that processes like this has size accurately and the small through hole that abuts one another, and guarantees substantially that gas does not have and flow into turbulently and flow out.Be preferably in that every Laufzentimeter is provided with about 10 to 60 through holes on the spray nozzle device, and at this moment the total amount of through hole cross-sectional area preferably accounts for 40% of this spray nozzle device area.

In order to stop coating granule or droplet to drop on the heat radiator that extends longitudinally in the annealing device of surface of the work coating equipment, we also advise forming a groove radially spaced apart and coaxial with its longitudinal axis with radiator on spray nozzle device.

Spray nozzle device structurally has a large amount of through holes that is distributed, can reach the flexibility that has height in use, cover these through holes by (for example with adhesive tape or lacquer) selectively, can make the work through hole of wire or planar distribution keep unimpeded selectively.Keep unimpeded so will in fact play the through hole line of very narrow slit injector same purpose, and remaining hole is covered.

Said structure is added the heat radiator of longitudinal extension, makes the described plating manufacturing process that is used for spray nozzle device also have another important advantage.Knitted grid is different as spray nozzle device with using, make a smooth especially metal surface by galvanoplastic, it in the radiator location for radiation, play the effect of reflector, and under the situation of shaft-like radiator, make sent those not towards the heat radiation reflection of work to workpiece.

The annealing device of film device has a heat radiator that is contained in cylindrical cavity tracks the inside that extends along traffic direction in being coated with by cylinder of the present invention (as tin can) continous way, and also has one as the above-mentioned radiator surface that makes to keep peace and quiet device.

Below by means of the explanation of the example shown in accompanying drawing the present invention.

Wherein:

The extensional surface perspective diagram of Fig. 1 cleaning has the set large tracts of land gas of the present invention and is blown into or sucking-off.

Fig. 2 and Fig. 1 similarly with the perspective view of heat radiator surface as clean surface, have the spray nozzle device by air-flow periodic duty of the present invention.

Fig. 3 malleation of the present invention or negative pressure channel fragmentary, perspective view have a spray nozzle device that is drilled with pore, and wherein a part of hole is covered selectively.

Fig. 4 is used for the coating equipment constructed profile that cylinder such as can are coated with inner membrance, have adjacency with it by coating annealing device of the present invention.

Fig. 5 is according to the annealing device cross-sectional view of the present invention of Fig. 4 V-V line.

Fig. 6 makes by the spray nozzle device schematic cross section in Fig. 3 to 5 structure of the present invention with general method plated metal structure on the negative pole transverse slat.

Represented an expansion that is used for explaining the inventive method among Fig. 1 surface 1, some suspended particulates 3 or suspension droplet are arranged above it, they fall towards surface 1 under the effect of own wt G.By the present invention, on the surface 1 that stops these suspended particulates to be fallen to keep clean, preventing that them from forming by baking, sclerosis, bonding or with any alternate manner does not there wish the surface contamination that produces, make that gas is as shown in arrow 5 to be blown into or sucking-off in large area, and the eddy flow that might formation shown in dotted line particulate 3 is upwards risen.By large-area gas flow, on surface 1, formed one air film 7 that flows, it stops suspended particulate 3 to drop on the surface 1, at this moment must guarantee to be blown into or to siphon away not cause smaller turbulent flow for the surface 1 of launching as far as possible along surface 1 gas, this turbulent flow can order about particle 3 and move towards surface 1 in certain zone, and this point to be us just will prevent.

Heat radiator 9 surface thermal radiations of the heating helix 11 of the band energising that the clean surface 1 among Fig. 2 ' be schematically illustrates.This heat radiator 9 rises in a well-known manner by warmed-up gas above it, forms free convection K on this.If now by the present invention surface 1 ' above implement large-area gas flow, with stop suspended particulate 3 fall radiating surface 1 ' on, the efficient that then must prevent radiator 9 can not reduce excessively owing to this strand air-flow, in other words, radiating surface 1 ' seriously do not cooled off because of gas flow.Expectation is shown as shown in Figure 2, in order to accomplish this point, the method that adopts be by radiating surface 1 ' both sides and with it the area of adjacency the nozzle that plays the slit injector effect 13 that extends longitudinally is set, go into gas by a side-blown wherein, opposite side siphons away gas, thus the surface 1 ' on realized gas flow.In order to prevent because the flowing of gas 5 from surface 1 ' radiation area take away heat, should make gas 5 by means of pump 17 process pipe-line systems 15 periodic duties that schematically illustrate, pipe-line system and well insulated on every side and/or heating when heating helix as the gas that makes like that again that shows with expectation shown in 19, therefore, radiating surface 1 ' and the gas film that flows between thermograde can ignore.If need not this additional periodic duty, then for the heat of being taken away by air flow is remained in the negligible very fractional value scope, it be as much as possible little promptly will to make each unit interval flow through the throughput of 1 ' top, surface, can be by following way.The nozzle 13 that Here it is requires to play the slit injector effect has very narrow structure, and insufflation side and suction side are air-breathing with less malleation+△ P air feed and less negative pressure-△ P respectively.

The manufacturing cost of this very narrow nozzle that extends longitudinally is higher.Represented to play a kind of simpler structure of slit injector effect among Fig. 3.Positive pressure passageway or negative pressure channel 21 vertically are made of three walls 23 along it.On the 4th vertical wall of formation nozzle wall many adjacent each other discontinuous small through hole 27 are arranged.Desirable nozzle arrangements can cover unwanted through hole 27 with adhesive tape, lacquer, silicones, rubber or other material that meets this purpose and realizes on nozzle wall 25, general employing shrouding 29 covers and makes it only to stay through hole 27a, and they have determined that just desirable as shown in Figure 3 narrow nozzle stitches desired nozzle arrangements.The part of this nozzle wall, that part of structure that promptly comes into operation are preferably made with electroplating as Fig. 6 schematically illustrates, and electroplated layer of metal layer 35 this moment on the many adjacent each other pins 33 as negative template 31.Constituted a smooth especially coating 35 that has by the distribution pattern in the formed very fine and closely woven hole of pin 33 thus.Also can also make, for example on a smooth thin plate, process through hole with laser with other method.The nozzle wall part preferably is made up of about 10 to 60 through holes 27 of every Laufzentimeter, and the size in these holes accounts for 40% of nozzle wall area according to them and determines.The level and smooth metal surface of the structure of making like this 35, as the back to introduce, very big advantage is especially arranged when using heat radiator.

When being heat-treated, the coating of workpiece is necessary to solve described problem by the present invention.The workpiece that this coating usually will apply by court is blown into powder particle or liquid particles is realized, and often by means of static, and after having powder or liquid coating on the workpiece, will coating be heat-treated, promptly heat.Heat treatment can be carried out basically like this, be about to infrared source and be contained in the cated back side of workpiece, come heated parts thus, workpiece will be heated to and make the above-mentioned relevant coating that is coated with up have desired effect, obviously in this technology, be used for heated parts owing to most of heat, so the radiant heat utilization rate is very low,, heat radiator must be designed to have the much bigger power that adds thermal effect institute actual needs than reaching coating according to the used material of workpiece, volume or processing time.If this radiator is located at the same side on the surface that workpiece will apply; and be positioned as close to the area that is coated with on the workpiece with coating; then solid or liquid particles that falls back from workpiece and/or coating particles or the droplet that enters the heat-treatment zone from coated areas; can drop on the radiating surface of radiator, and through local top layer that generations such as overcure, baking are difficult to remove.On the other hand, heat radiator is located at the possible power that significantly reduces radiator of structure of workpiece coating one side.Under use situation of the present invention, can accomplish this point.The paint-on technique of being mentioned also can be used for being coated with cylindrical inner surface, and the inner surface of tank body in producing as can is particularly in food industry.

Represent as schematically shown in Figure 4, when producing continuously, jar 37 is by (the expression on figure of an overhanging arm, because of it is a unessential means of delivery within the scope of the invention) move, at this moment also method of the manufacture process of cylinder 37 not represented among Fig. 4, at first by the sheet moulding, weld longitudinal edge then, the cylinder 37 that welds moves through coating unit 41 along cursor slide 39.Schematically illustrate as Fig. 4, be blown into by input pipe 43 inwall towards cylinder 37 under gas promotes in the form of coating unit 41 place's coating, and often make it to stick on the inwall of cylinder 37 by means of electrostatic force with solid particle or droplet.Electrostatic force is to produce by set up highfield between the inflow district of input pipe 43 and cylinder 37.Aspiration device 46 siphons away again along the coating that comes out between each cylinder 37 of direction F operation.The weld seam part that mainly is cylinder 37 applies in this way.And then coating unit 41, and an annealing device 44 by the present invention design is arranged, and as shown in Figure 4, it has one to be located at heat radiator 51 on the arm 39 along what direction F extended, and it is not polluted by coating fully in top illustrated mode.On the other hand, make heat radiator 51, can utilize radiator 51 fullest, that is make it to have optimum efficiency directly by coated areas in its front.

Shown in Figure 5 is the cross-sectional view of annealing device 44 of the present invention.In its overhanging arm 39, processed a groove 45, the weld seam 49 that it directly is in cylinder 37 scribbles under the part of coating 47, at this moment cylinder 37 by the means of delivery (for example chain device etc.) in this figure, do not expressed on arm 39 and separated by a distance with it moving.A heat radiator is arranged in groove 45, as infrared ray rod-type radiator 51, the infrared radiator of the band quartz ampoule of making by Heraeus company for example.Groove 45 has the flange 53 that stretches out towards the plane of symmetry E by weld seam 49 zones, and nozzle wall 55 is housed on flange, it preferably have as Fig. 3 represented with illustrated structure.Nozzle wall 55 plays passage, is similar to the passage 21 of Fig. 3, and it feeds for example malleation △ P through piping installation 57.As shown in Figure 5, because after utilizing shrouding 29 to carry out shutoff, the work through hole 27a that stays is unimpeded, and that determined two side direction and the

slit injector

59 and 61 that longitudinally a stretches bottom.So form the large tracts of land air-flow 63 shown in the figure upward arrow round radiator 51, it will stop that return or drop on the surface of radiator 51 as the coating 3 that the coated areas 41 of Fig. 4 enters heat-treatment zone 44 from cylinder 37, otherwise can become a kind of pollution layer that influences radiator 51 thermals efficiency that is difficult to remove by baking.

As seen from Figure 5, the bigger zone of radiator 51 is towards arm 37, thereby to latter's heating rather than to coating 47 heating.At this moment improve radiator 51 efficient by nozzle wall 55 is made have smooth, towards the surface of the direction of radiator 51 reflection, so nozzle wall 55 is also born the task of reflector except being blown into the gas task that it is born.A kind of so smooth reflecting surface as already mentioned, is to realize as nozzle wall 55 by make nozzle arrangements 35 with electro-plating method as Fig. 6 is represented.

Claims

1, it is relevant with it at least along the method on the clean surface of a dimensional directions will keeping of extending (1,1 ', 55) to stop suspended particulate or droplet (3) to drop on, and it is characterized by: in this surface by being blown into gas in large area and/or sucking-off gas (5) causes one air-flow.

2, at least (for example according to one of claim, according to claim 1) described method, the surface that wherein will keep clean is the radiating surface (1 ', 51) of heat radiator, it is characterized by: throughput is elected the order of magnitude that carries out free convection by the effect of heat radiator as, or gas heats by means of heat radiator (1 ') itself in periodic duty.

3, at least according to the described method of one of claim (for example, according to one of claim 1 or 2), it is characterized by: be blown into and the sucking-off set many discontinuous place (27,27a) in surperficial region of gas are carried out.

4, cloudy only suspended particulate or droplet drop on the lip-deep device that will keep cleaning that at least along a dimensional directions extend relevant with it; it is characterized by: the zone at (1,14,51) place, surface is provided with the venting channels (21,45) of a malleation or negative pressure (± △ P) at least, and has the spray nozzle device (27,27a, 13) of an extension.

5, at least according to the described device of one of claim (for example, according to claim 4), it is characterized by: spray nozzle device contains many discontinuous through holes (27,27a).

6, at least (for example according to one of claim, according to one of claim 4 or 5) described device, it is characterized by: spray nozzle device (25,55) is a metal structure (35), and it is to realize by the negative template that has many pins (33) is electroplated processing.

7, at least according to the described device of one of claim (for example, according to one of claim 4 to 6), it is characterized by: spray nozzle device (25,55) is gone up every Laufzen-timeter 10 to 60 discontinuous through holes (27,27a) approximately.

8, at least according to the described device of one of claim (for example, according to claim 7), it is characterized by: the summation of through hole sectional area accounts for the 30-50% of spray nozzle device area.

9, at least (for example according to one of claim; according to one of claim 4 to 8) device on the heat radiator (55) that is used for stoping coating granule or droplet to drop on and extends longitudinally in the annealing device of surface of the work (37) coating equipment; it is characterized by: spray nozzle device (55) constitutes a groove; it is coaxial with the radiator longitudinal axis; and radially spaced apart with it, especially it also plays reflector.

10, at least (for example according to one of claim, according to one of claim 4 to 9) described device, it is characterized by: the through hole of spray nozzle device (55) can cover (29) selectively, as with adhesive tape, lacquer or other cladding material, make the wire of spray nozzle device (55) or the figure of planar work through hole (27a) keep unimpeded selectively.

11, at least according to the described method of one of claim 1 to 3 or be applied to cylinder according to the described device of one of claim 4 to 10 at least and be coated with inner membrance (being coated with inner membrance) and be coated with in the annealing device of inner membrance especially for its longitudinal seam (47) as can.

12, be coated with the annealing device of interior film device for cylinder (37) (as can) continous way, it is characterized by: be provided with one along the traffic direction longitudinal extension, be contained in the heat radiator (51) of cylindrical cavity tracks the inside, and be provided with one and be used to make the radiator surface to keep clean device by one of claim 4 to 10 is described at least.

13, at least according to the described method of one of claim 1 to 3 or be applied to make heat radiator surface to keep clean according to the described device of one of claim 4 to 10 at least.