Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41F—PRINTING MACHINES OR PRESSES
  • B41F35/00—Cleaning arrangements or devices
  • B41F35/003—Cleaning arrangements or devices for screen printers or parts thereof
  • B41F35/004—Cleaning arrangements or devices for screen printers or parts thereof for cylindrical screens

Definitions

• Device for supplying a substance to an application point method for supplying substance and for cleaning the device, and method for producing the device and auxiliary device for cleaning the device
• the invention relates to a device for supplying a flowable, pasty and / or gaseous substance to a point suitable for substance application extending over the length of the device, and in particular for applying a work surface such as an application surface that extends along the said point the substance. It also relates to a method for manufacturing the device, to a method for application and cleaning operation of the device and to an auxiliary cleaning device.
• a main aim of the invention is to provide a device for technically, economically, ecologically and functionally significantly improving the supply of substance for uniform distribution of substance and in particular application processes of all kinds, in particular for applications on moving webs without or with the use of a screen cylinder template.
• the operation and cleaning options should also be optimized.
• the device according to the invention is characterized by the combination of the solution measures specified in claim 1.
• the device manufacturing method according to the invention consists in the adhesive technology specified with the subordinate manufacturing claim.
• the auxiliary device according to the invention for cleaning the application device is used when, for operational reasons, cleaning may not be carried out at the work station / application site, for example with regard to further application devices arranged next to one another in a multicolour printing machine, which continue to be used in the Operating state of the application are left, which is why the application device, which is intended for cleaning, by the Application machine / printing machine removed and used for cleaning in the cleaning auxiliary device according to the invention, the work functions of which, as far as the cleaning operation is concerned, are the same as the work functions of the application or printing machine.
• the device according to the invention is i.a. provided for the application of a flowable substance to a flat surface, web or the like in the application area. with a preferably magnetically pressed doctor element (roller doctor, stick doctor, splitting doctor) and can be operated with a substance feed device with feed control (feed device) which can preferably be used in both flow directions.
• a substance flow dividing device for uniform distribution of substance is integrated in the device and comprises at least one flow channel body and substance outlets connected therewith.
• the distance between two adjacent substance outlet openings is in the range from 3 to 20 mm, preferably 4 to 16 mm, independently of all application widths which may be 10 m and more and the outlet openings are arranged at a distance from the application site, the outlet openings opening into a space between them and the application site.
• the device is particularly provided for optionally covering the entire surface, impregnation, dyeing or the like, for patterning or for partial coating, impregnation or the like. using a sieve cylinder (round template).
• a sieve cylinder round template
• it is designed in such a way that it is automatically cleaned after the end of an application process by introducing one or possibly several liquid or / and gaseous substance (s), possibly together with a circular stencil, in particular also together with the conveying device , without it must be removed from the existing round template.
• the feed device integrated in the application device is used as a return line for application substance and in particular as a suction device for substance, substance / water mixture, rinsing water or cleaning liquid.
• a multi-functional unit is achieved, which is distinguished both for the work performance of the application, as well as for the supply control and the cleaning, in that the three work functions supply, application and cleaning by means of a device integrating all process and functional possibilities. Whole are executable.
• Important features of the invention relate, inter alia, to the design of the substance inlet area, the substance outlet area of the dividing device, and the continuation and delivery of the substance from here to the application point; the dimensional, quantity and width limitations described above have been eliminated, the invention being the Mouth area is designed so that the application quality and the overall performance are considerably improved and, moreover, the optimum self-cleaning property of the application device is achieved. This is also the basis for the suitability according to the invention for cleaning a round template that may be present.
• the substance outlet is virtually pressure-free (without spraying), whereas the water or cleaning liquid is discharged with cleaning spray pressure, but the application substance and cleaning liquid are guided through the same flow channel system ⁇ and emerge from the same mouth openings.
• the overall process flow essentially comprises the following steps: a) feeding the substance from a substance storage container through a conveying device and a line / hose system to the substance inlet opening (forehead-body opening) of the substance-width distribution device integrated in the application device (Dividing device); b) flow through the dividing device in a width-distributing manner until the substance escapes; c) bringing the substance to the application site starting from the substance outlet; d) applying the substance; e) Controlling the production of substances and, after the end of the application, f) preparation and cleaning work (preparation work) for the next application process.
• the invention is primarily directed to sections b) and c); Refinements relate to the further steps mentioned.
• the invention thus encompasses the following technical areas involved in the process and networked with one another: machine technology, application technology, control technology, template technology, but also operating, handling, cleaning and set-up technology.
• Outlet channels and the application point are associated with this: 3a) more substance (unlimited availability of substance) at the application site; 3b) optimized substance exit and delivery density and 3c) non-contact (free) substance guidance (flow) from the row of outlet openings, the openings particularly advantageously consisting of channel tubes and further advantageously ending in an outlet slot of 2-10 mm in length; a layer-like substance curtain is formed, the substance flows with little pressure to the application / substance consumption point. This also achieves the self-cleaning property and the wide homogeneous
• the dimension A in Fig. 1 is the diameter of a standard round template with e.g. 640 mm circumference (repeat sample unit). In Fig. 2, this dimension A of a larger standard template is 1020 mm.
• the dimension B is the same size in both figures and denotes the diameter of the circular stencil / screen cylinder opening, which, for example, is about 125-150 mm.
• the dimension C denotes the difference between the two
• FIG. 3 shows a circular template of any standard dimension into which a standard doctor device, designed as a magnetic roller doctor, is inserted.
• Fig. 4 the above-described situation (Fig. 1-3) is shown in a single drawing; the dimensions AI and A2 denote different, customary template diameters (pattern repeats).
• FIG. 5 shows a circular stencil together with the squeegee inserted therein in the working position.
• a broken line situation is shown in a dashed representation: the circular template is raised by a certain distance from the application level; the squeegee device inserted into this stencil is slightly more raised than the stencil.
• the application machine or the printing machine or the conveyor belt of the printing machine) is in the rest position.
• the circular stencil rotates slowly, which prevents the application substance (printing paste, color) from flowing out. In this operating situation, there is no contact with the application level on the outer wall of the stencil and no contact with the doctor element on the inner wall of the stencil.
• FIG. 5 makes it clear that when dimensioning a support bar of the doctor device, sufficient clearance for the support bar in the stencil opening must be ensured. In other words, the dimension for the cross-section of the support beam is very limited in several respects.
• 6, 7, 11 and 12 show an exemplary embodiment of a device according to the invention in different representations, views and installation situations.
• 8, 9, 10, 13, 14a and 14b show a further exemplary embodiment in different views, representations, installation situations and cutouts.
• the first example shows a device 1 constructed according to the invention in connection with a doctor blade 93, the second example in connection with a doctor blade 92, both doctor blades being magnetically compressible.
• the fixed distance between openings 600, which face an application surface 81, and an application point 8 or a stencil inner wall is very small, namely only slightly larger than 1 mm, while in the second Example, the distance is relatively large, namely up to 100 mm, as a result of which, in the latter case, a relatively long flow distance arises between the substance outflows 600 and the application point 8.
• FIG. 13 shows a cross-section of a substance-wide, homogeneous and pressure-free flow, which is achieved by the device 1 according to the invention, or in any case very low-pressure and splash-free.
• FIG. 14 b illustrates the wide-homogeneous flow of cleaning fluid from the outlets 600 under pressure.
• Uniform in terms of width is to be understood in such a way that during the application process, by bringing in the substance, a coherent substance storage bead is formed over its entire length, ie over the entire application width, in a coherent manner, preferably with a small volume. and that during the cleaning process the cleaning liquid flows out with a coherent liquid body and with such a high discharge pressure (possibly increased by air pressure) that the doctor element and also a stencil 80 over the entire working area te cleaned evenly.
• FIG. 13 shows that the cleaning process can advantageously be intensified by additionally supplying cleaning liquid - in FIG. 13 through two pipes 35, 36 (additional channel body), each with a row of outlet openings 61.
• cleaning liquid in addition to the introduction of cleaning liquid through the orifices 600, cleaning liquid can be introduced particularly advantageously through an inlet flow channel 401 (channel K1), specifically through a substance Inlet opening 42 (eg FIG. 6) opposite (pipe) channel end, the channel K 1 approximately in the middle of the device through a bulkhead or the like. is sealingly divided.
• inlet flow channel 401 channel K1
• substance Inlet opening 42 eg FIG. 6
• pipe pipe
• the device 1 comprises a tubular square hollow body 21 (support tube) which forms a support element 2 and which extends in the device length over the application width of the application surface (fabric web) 81.
• the material web 81 is moved in the horizontal direction in the working movement direction B, wherein it rests on a magnetic table 82.
• An at least partially magnetizable, slidably held doctor element 91 can be pressed with its doctor edge against the web 81 and possibly a round template 80.
• the ends of the support tube 21 are held in supports of an application machine.
• the support tube 21 forms the jacket body for a connection channel body 31 inserted therein in a form-fitting manner, which extends over the application width.
• a connecting flow channel 41 formed by a pipe 401 with a circular cross-section passes through a body opening on the end face of the channel body 31 and extends at least into the region of the body longitudinal center. There it is connected via a central substance flow dividing opening 51 to a dividing duct system arranged around the flow duct 41.
• connection flow channel 41 forms the first channel K 1 of a substance flow dividing device 3 which is at least partially worked into the connection channel body 31.
• the following substance flow division channels form a system of division stages. In these, the channels multiply from level to level via associated division openings between the levels.
• the division mouths are intended to be divided over the width of the application at equal intervals. and the channels extend longitudinally in the substance flow dividing device in the channel body 3.
• the substance is also moved in the reverse direction of flow, corresponding to the channel cross section, in a combined, collected and concentrated flow to form a flow line out of or possibly into a connecting line connected to the opening 42.
• K (Nl) denotes the dividing stage
• N the number of the channels
• Z the number of the Channels in every stage.
• the last that is to say the next to the application surface 81, has the openings 600 provided at the same distance A.
• the objectives aimed at by the invention are achieved if the distance dimension (division dimension) between adjacent openings 600 is in the range from 3 to 20 mm, preferably 4 to 16 mm, the openings 600 being in a fixed, selectable distance from the application surface 81.
• This last-mentioned distance is very advantageously from 1 to a maximum of 100 mm.
• the cross-sectional area of the orifices 600 is the same and is in the range from 2 to 30 mm 2 .
• the sum of the substance outlet cross sections is preferably at least twice and advantageously multiple of the inlet flow cross section of the connecting flow channel 41.
• the distance dimension is the division dimension from the center to the center of two adjacent orifices 600 or openings 60.
• FIG. 12 shows the pipe-surrounded connecting duct body with 6 dividing duct stages or series, which thus has 64 KV dividing outlets and can be provided according to the invention for application widths of approximately 300 to 1200 mm.
• the dividing device 3 very advantageously comprises two further (additional) channel bodies 32, 33 which are arranged outside the body 31 in succession in the region between the underside of the tube 21, which faces the application surface 81, and the latter .
• the additional channel body 32 is attached to the underside of the tube 21 and forms a further division stage.
• the following additional channel body 33 is attached to the underside of the channel body 32 facing the application surface 81.
• the outlets and outlets of neighboring bodies are provided in the same number and congruent.
• the substance thus passes through 256 outlet openings 60.
• the device according to FIG. 12 is therefore intended according to the invention for application widths of approximately 1 to a maximum of 4 m.
• the connecting channel body 31 located inside the support bar tube 21 has seven division stages, and below the body 31 there are two further flow channel bodies 32, 33 on the outside, as in FIG. 12, but each with two division channels.
• Channel steps set so that the device 1 according to this example has 2048 outlet openings 60 of the K12 series and thus invented is intended for application widths of approximately 8 m.
• outlet openings 60 are of tube-like configuration and axially parallel, as in FIGS. 12 and 13. It has been found that a tube length in the range of 1 to 100 mm is particularly advantageous. 12 and 13, the tube openings 60 are formed in the additional channel body 33.
• the device 1 according to FIG. 12 has a relatively large tube length, while in the embodiment according to FIG. 13 the tube length is relatively small. It is generally important for the invention that the openings 60 are directly open to the application surface, so that the substance is free and - avoiding a space closed by the application surface, the round template or a layer thickness - at least in this respect without pressure build-up to the application site 8 arrives. Conversely, the substance can be effectively removed in the embodiment according to FIG. 12.
• 18a and 19a show the outlet orifices 600 provided at different or at the same pitch A.
• 18a and 19a show views A of exemplary embodiments according to FIGS. 18 and 19.
• a very particularly advantageous measure consists in the fact that the sum of the outlet cross-sectional areas of the outlet openings 60 is considerably larger than the cross section of the substance inlet opening 42 formed by the forehead-body opening of the connecting channel body 31 Substance outlet pressure at the outlet orifices 600 to the highest degree, ie reduced to near zero.
• the openings 60 are expediently shaped obliquely at their mouth edge in order to extend the mouth surface to the application surface. 8che to be directed. In the case of tube openings 60 with a circular cross section, this creates an elliptical shape of the outlets 600.
• a device according to the invention is shown essentially like Fig. 12, namely in Fig. 15a about a device pivot axis S, which extends parallel to the axis of the tube 401, to the left, i.e. pivoted against the direction of movement B. This position is the "Apply" operating position.
• the supply of application substance 9 is illustrated by arrows.
• the cleaning channel body 35 is attached in addition to the additional channel body 32 at the bottom of the connecting channel body '31; it is formed from a square tube which extends over the application width and is provided with a number of openings 61 (row of holes) which are preferably evenly spaced apart. The supply of the cleaning liquid into the body 35 takes place very advantageously through the connecting channel body 31, as will be described later.
• Tube openings emanating from step channels in the connecting channel body 31 are also incorporated into the additional channel body 32, these step channels being fed with cleaning liquid from the pipe 401 via a central opening 51 ". From the tube openings of the upper additional channel body 32 exiting cleaning liquid rinses the Longitudinal side wall of the additional channel body 33 directed towards the work station 8 (FIG. 15b).
• a sealing partition is provided in the longitudinal center of the pipe 401, so that the pipe 401 is used to feed or suction off the application substance / cleaning liquid on one end and to introduce additional cleaning fluid on the other end.
• the device 1 according to FIGS. 6, 7, 11, 12 is equipped with two longitudinal side walls or plates 22, 23 forming the distribution or support elements 2. These are attached to the longitudinal side of the support tube 21 and protrude vertically from the underside of the support tube.
• the additional channel bodies 32, 33 are fastened to the front support wall 22, as seen in the working movement direction.
• a U-shaped space open to the application surface 81 is formed between the walls 22, 23.
• the additional channel body 33 extends to the lower edge of the supporting wall 22, the openings 600 being provided in the region of this lower edge extending in the vicinity of the template 80 or the working surface 81.
• a holding magnet 83 is expediently arranged, which can hold a magnetizable roller doctor 93 on the wall 23 in the rest position.
• the device 1 according to FIGS. 15a and b is equipped with supporting walls in the same way as the device in FIG. 12, but in FIG. 15 there is additionally a collecting trough 25 for remaining cleaning liquid which can reach the outer walls during the cleaning process.
• the gutter 25 is formed on the outside of the rear support wall 23 in the lower region thereof.
• Liquid droplets remaining after the cleaning process, which run down during the following application process, are collected by this channel 25.
• a collecting trough 25 can also be provided on the front support wall 22.
• the doctor blade 93 is magnetically pressed against the application surface 81 in a position I, specifically in the working position. This favors the cleaning process, since the cleaning liquid is collected in front of the doctor blade 93, so that a bead is formed, on which the suction force acts at the outlets / outlets 600.
• the position of the roller squeegee is designated in the rest position on the wall 23.
• the circular stencil 80 on its inner wall can be completely covered with cleaning fluid and rinsed.
• cleaning liquid is sprayed on the inside to the rear wall 23 of the device 1, specifically to a point above the roller doctor blade 93 in the rest position.
• an embodiment of the invention according to FIG. 15a provides for the free lower longitudinal edge 84 of the longitudinal support wall 23 in the state of the non-lifted printing device To be spaced from the inner wall of the stencil so that a kind of splitting knife is created.
• This splitting knife 84 is used in that only the magnetic field of the magnetic device 82 is first switched off before the printing device is lifted out. As a result, the roller doctor blade is lifted and held by means of the holding magnet 83.
• the template 80 continues to rotate in the operating direction at least one full revolution.
• substance remaining in the template 80 in the form of a doctor blade coating with a layer thickness corresponding to the edge distance from the template 80 is coated onto the template inner wall. With the formation of this uniform layer, the disadvantageous drop formation is avoided.
• the order mode can be resumed or cleaning can take place.
• a very advantageous embodiment of the mouth area of the tubular outlet openings is that the mouths 600 end in a gap slot 601 that is continuous over the application width. It is important that the distance between the gap inner walls (gap width) is at least somewhat smaller than the diameter of the channel tube ends, i.e. of the mouths 600 is selected. Particularly good results have been achieved with a gap length (flow length) (depth of the gap between the opening-slot edge and mouths 600) of 2-12 mm, preferably 3-10 mm. 15b shows the slot-shaped connection of the tube openings 600/601 which are closely spaced according to the invention.
• the dividing device 3 is arranged within the support tube 21.
• a strip-shaped additional channel body 32 is fitted to the mouths 600 of the tube 21, into which connection channels which form tubular outlet openings 60 'and which end in the mouths 610 are machined.
• the two side walls of the (conical) channel body 32 which is conical in cross-section, are shaped obliquely, so that the lower horizontally arranged surface of the body 32 in the lower region 320 lies directly at the outlet openings 610, that is to say only a very narrow edge forms.
• This embodiment of the mouth area according to the invention prevents the cross-flow of substance at the outlet surface, as opposed to e.g. 13 is possible on the underside of the channel body 33, which results in a significant advantage for cleaning.
• Both channels 38, 39 can be connected to a cleaning liquid source from a device end face.
• Directional arrows R illustrate an additional liquid outflow from the channel 39 in the two end regions of the application device 1 on the front side.
• a doctor element 91 which can be magnetically pressed by means of a magnetizable core 900, is formed by a profiled strip 90 which is pivotable about an axis parallel to the longitudinal axis, in FIG. 16 in the lower region the rear longitudinal side wall 23 is attached.
• the profile bar 90 carries a doctor blade 92 which is pressed against the application surface 81 by means of the magnetic table 82.
• the application substance 9 reaches the application point 8 in front of the doctor blade 92 over a drop distance of maximum 100 mm.
• FIG. 17 shows a device 1 according to the invention in combination with a splitting knife coating device.
• the device 1 is dimensioned for large application widths.
• An inventive pitch of approximately 4 mm enables an application width of approximately 16.4 m.
• the connecting channel body 31 arranged in the tube 21 is equipped with channel stages K 1 to K 7.
• the additional channel body 32 attached to the underside of the tube has three channel stages. Also the following, attached to the body 32
• Additional channel body 33 is provided with three channel stages.
• An additional cleaning channel body 35 in the form of a square tube is arranged between the two bodies 32, 33 and the rear longitudinal side support wall 23.
• This body 35 is fed with cleaning liquid either from one or both ends of the device or from the inflow channel K1. It also has a cleaning effect on the entire working width and also on the end areas of the coating-applying device 1.
• a variant of the embodiment is shown in dashed lines: the wall 22 is extended a little downward and a further additional channel body 34 is inserted into the resulting angle, which is attached to the body 33 in a sealing manner, for example by means of adhesive.
• This body 34 closes the outlet openings 60 in the body 33, the flow channels K13 and K12 are shut down, and the flow channels K1 are connected by outlet openings to tube outlet openings 60 'which fit snugly therewith and which enter the body 34 are worked in at a steep incline to the work surface 81 and end in openings 610.
• the mouth regions 340 of the additional channel body 34 are designed in the shape of a round cone, it being possible for this round cone shape either to be worked out from the body 34 or to have a correspondingly shaped part attached to it.
• the advantageous effect of this design measure is the same as that already described for FIG. 16.
• FIGS. 6 to 17 show devices 1 according to the invention each with an inlet channel K 1 in the form of a thin-walled tube 401 with a circular cross section which extends to at least the middle of the device; this tube is preferably approximately the same length or somewhat longer than the square support tube 21.
• the application substance or cleaning fluid is introduced into one of the two ends of the tube 401 and, in embodiments according to FIGS. 6-12, 15, 18 and 19, with the end of the pipe 401 connected to the connecting channel body.
• the cleaning liquid is introduced at one of the two ends of the pipe 401 and discharged from the other pipe end, possibly mixed with substance residues.
• a connecting channel body 31 is inserted into the square support tube 21.
• a connecting flow channel 41 (stepped channel K1) is formed, which extends at least from one end face of the device to the region of the longitudinal center of the body.
• the support tube 21 is sealed at its ends and provided at least at one end with a pipe or hose connection through which application substance or cleaning liquid is introduced or discharged.
• the pipe connection can e.g. Expediently protrude a piece into the support tube 21 and open into the connecting flow channel and, in particular, advantageously also be provided with a cross-section-forming intermediate piece.
• a coupling hose connection must be attached to a plate which seals the supporting tube end;
• the connecting channel body 31 preferably extends into the vicinity of the end of the supporting tube and can optionally be connected to the end plate as a sealing intermediate piece by means of a rubber plate.
• the rubber plate or another intermediate and end plate advantageously has a funnel-shaped flow-forming channel.
• an additional channel body 32 ' is sealingly attached to the outside of the front side wall (viewed in direction B) of the support tube 21, the length of the body 32' corresponding approximately to the application width.
• the body 32 ' has a flat wall shape.
• Further channel bodies 33-35 are advantageously attached to this body 32 'in sealing surface contact.
• the connecting channel body 31 comprises four step channels K1-K4, and the additional channel body 32 'is equipped with four step channels K5-K8.
• the additional additional channel bodies 33, 34, 35 are then placed side by side in order to achieve the pitch A according to the invention for the outlets 600 in relation to the application width.
• the additional channel bodies 33, 34 and 35 each have a step channel K9, K10 or K1, and in the plate-shaped additional channel body 35 the tubular openings 60 (FIG. 18a) with a relatively large flow length (up to max 100 mm).
• the devices according to FIGS. 18 and 19 correspond to the exemplary embodiments according to FIGS. 6, 7, 11, 12 and 15. After the application operation has ended, substance is sucked off by the dividing device 3.
• the distance between the work station 8 and the substance outlet orifices 600 is 1 to 10 mm, preferably 1 to 5 mm.
• the distance D from the work station is understood to mean the distance that exists between the edges of the substance outlet openings 600 and the work surface 81. It is essential that in the application mode the fixed distance of the substance outlet mouth edges to the work surface 81 or a template 80 is so large that there is no sealing and / or nozzle doctor effect between the edge and the work surface or template and the distance between the edge and the work surface also may not act as a coating knife.
• a further square tube 24 is attached below the support tube 21, the length of which is approximately that Application width corresponds.
• a flow channel body 37 for cleaning fluid is inserted, which flows out on the underside of the square tube 24 through one or, if necessary, through a plurality of rows of holes 61 arranged there (with a discharge pressure that is as large as possible, ie effective for cleaning).
• an expedient embodiment according to the invention consists in the fact that the longitudinal support walls at the same time act as a protective wall 220/230 for the flow channel body (s) or for a material that is made in particular of relatively soft material (light metal, plastic) Support tube 21 are formed.
• the longitudinal support wall 22 is advantageously provided with an angular, in particular U-shaped cross-section, the angled leg forming the upper side of the device 1.
• the rear longitudinal support wall 23 also advantageously forms a protective wall 230.
• an angle corner profile 26 forming a supporting element is arranged between the channel bodies 35 and 37.
• openings 61 for cleaning liquid are incorporated, which are aligned with openings in the wall of the support tube 24.
• the wall openings are in flow connection with a channel stage K3 'formed in the channel body 37.
• the second channel stage K2 'of the cleaning liquid dividing device is incorporated into the body 37.
• the associated channel stage K 1 ' is formed in the connecting channel body 31, specifically as a channel extending from the front of the body and extending into the middle of the body, as has already been described with reference to the exemplary embodiment according to FIG. 13.
• FIG. 19 shows an embodiment variant for high application volume output, ie with an inlet flow channel K 1 of a relatively large cross section and, accordingly, relatively large Dimensioned, adjoining dividing channels K2 to K5, which are incorporated into the connecting channel body 31, which is surrounded on all sides with the jacket support tube 21.
• a series of additional channel bodies 32 to 36 are sealingly attached to the lower outer tube of the supporting tube and continue the stepped channels up to K10.
• the substance is diverted from the flow system transverse channels K10 into the tubular flow outlet openings 60, which are designed according to the invention and are arranged perpendicularly thereto, and after flowing through this tube flow path from elliptically shaped openings 600 (FIG. 19a), in order to pass through the free, open substance-bringing-up route to get to application point 8.
• the substance is transported lying on the inner wall of the template up to the application point 8.
• the dividing device 3 is assembled in a modular construction from a range or a group of cuboidal channel bodies, at least one of which forms a connecting channel body.
• At least one additional channel body is attached to the adjacent connection channel body in a space-saving manner, expediently it is also possible to group several additional channel bodies around a connecting channel body.
• cross-sectional dimensions (edge lengths and heights) of channel bodies of a group are dimensioned such that a space-saving, compact head unit with an essentially rectangular overall cross section is created in the upper region of the dividing device 3, while one in the lower region facing the application surface 80 a plate-like front wall is formed, which consists of at least one additional channel body and projects with the openings 600 into the area of the application point 8.
• devices according to the invention are expediently equipped with a substance contact sensor 7.
• a substance contact sensor 7 This is mounted in a simple arrangement on the underside of the connecting channel body 31 or on an additional channel body facing the working surface 81.
• the sensor tip is located in the area of work place 8.
• the sensing tip 71 can preferably be pivoted about an axis 70 (FIGS. 13, 15, 19) parallel to the longitudinal axis of the device, and the contact sensor 7 is expediently inserted into the device 1 in an axially displaceable manner in the longitudinal direction of the device.
• the sensor 7 is controlled electrically and / or pneumatically. Depending on the adjustable sensing tip 7 at a distance from the working surface 81, a substance level is set and kept constant by the contact sensor controlling the substance introduced into the connecting flow channel 41 via an automatic control device (not shown). So there is a need-based, constant quantity control. For suction operation, it is particularly advantageous that the outlets 600 are widened in a funnel shape.
• the first channel step K 1 'of the cleaning liquid dividing device is in turn formed in the connecting channel body 31 and separated by means of a bulkhead in the middle of the body from the step channel K 1 for application substance starting from the other end face of the body. 19, similar to FIG. 18, an angle corner profile 26 is attached to the channel body 32 and the channel bodies 33 to 36.
• a fundamentally important quality standard for application devices of the type according to the invention is their straightness state, that is to say the highest possible bending stiffness, combined with the smallest possible device cross-section and weight.
• a manufacturing method according to the invention is presented for the device, which offers great quality advantages in terms of increased bending strength in combination with reduced weight and a relatively small cross-section.
• This production method consists in that the device according to the invention is produced by gluing the cross-sectional structural parts over a large area (flat and full area), so that welded or screwed connections are eliminated.
• connection of light metal or plastic with steel is particularly advantageous for the manufacturing process, the channel bodies possibly being formed with a jacket tube made of light metal or plastic, while the supporting walls consist of steel.
• a further advantageous embodiment of the manufacturing method consists in bending individual shaped parts such as in particular the square support tube 21 for producing an adhesive prestressing connection against the direction of the bending stress caused by the working operation and with other shaped parts, in particular with them to glue the plate-shaped longitudinal side walls 22, 23 which extend at least over the entire working width.
• Another particular advantage of the adhesive production technique according to the invention is that the device is optimally sealed; this both in the area of the support tube 21 and in the channel connection area of one or more other channel bodies attached.
• Devices according to the invention ensure complete internal and external cleaning as a result of the cleaning liquid flowing through the dividing system with substance delivery to the application point.
• the cleaning process within the application machine is connected directly to the application operation, preferably using the device execution forms according to FIGS. 6 and 7, 11 and 12, 15, 18 and 19; or after removal of the application unit consisting of the dividing device, doctor blade device and possibly round stencil from the application machine and thus formation of a cleaning device constructed according to the invention, which is also referred to as an auxiliary machine, for which application units in particular in the embodiment according to FIG. 9, 16 and 20-24 are suitable.
• a previously described device is provided as a cleaning device 1 ', in which application devices, consisting of the dividing device, the doctor element and, if appropriate, the stencil, can be used as its component.
• FIG. 20 shows a detail of an application machine 100, seen from above, with a substance supply device connected to the application unit.
• a conveying device prmp
• substance is removed from a container and fed to an application point.
• 21 shows that the application unit together with the screen cylinder is removed from the application machine 100 and inserted into an auxiliary cleaning device, thereby forming the cleaning device.
• FIG. 21b shows the same conveying device as FIG. 20b, but with a suction line, removing cleaning fluid from another container and feeding it to the application unit, which is now operated as a self-cleaning screen cylinder cleaning device.
• FIG. 22 shows the same cleaning auxiliary device 1 ′, which is shown in a top view in FIG. 21, in a side view.
• the tilted / inclined position shown in dashed lines during the cleaning process causes the cleaning liquid to run off rapidly from the interior of the screen cylinder 80.
• a second inlet connection 42 'for cleaning fluid is provided, which is shown enlarged in FIG. 22b.
• 22a shows the other pipe end seen from below, the end region of this second feed line for cleaning liquid being shown cut away, so that a U-shaped or semicircular connection of the two pipe ends can be seen.
• FIGS. 22a and 22b corresponds to the cross section shown in FIG. 13.
• FIG. 23a shows in cross section a cleaning device 1 'according to the invention with a cleaning auxiliary device and an application unit inserted therein, ie also with a clamped round template 80.
• the circular template is preferably inserted and clamped in the same way as in the application machine.
• the support roller 810 and the circular template 80 lying thereon are driven.
• the support roller 810 is rubberized, provided with an absorbent coating or designed as a brush roller.
• a magnetic device 82 is drawn in dashed lines, which presses a doctor roller as well as in the application machine.
• FIG. 23b Another advantageous embodiment can be seen in FIG. 23b in an enlarged detail of a detail from FIG. 23a; a plate-like strip equipped with a permanent-magnetic device 82 'is inserted into a brush covering.
• the doctor blade 93 made of magnetizable material is magnetically attracted once with each rotation of the support roller 810, i.e. So brought from the rest position shown in dashed lines to the work position.
• the arrows and drops show that the cleaning process is optimized by additionally supplying cleaning liquid in connection with the magnetic doctor pressure.
• FIGS. 24a-e show the sequence of an application and cleaning sequence carried out according to the invention, in particular the cleaning of the application unit with a round template in the machine. 24a is identical to FIG. 20a and clarifies the application process.
• 24b shows the reverse operation of the conveying device: the substance is returned from the application device into the substance storage container, i.e. also from the template and from the feed lines.
• 24c illustrates an intermediate step which is advantageously provided according to the method, namely the complete recirculation residual substance from the lines and from the conveying device by sucking in and conveying cleaning liquid.
• This substance-saving process step is ended as soon as the cleaning liquid reaches the end of the supply pressure line, which feeds back into the supply container according to FIG. 24c.
• 24d shows that the pressure line, now filled with cleaning liquid, is reconnected to the application device and that the cleaning operation is carried out by means of the conveying device.
• Compressed air or another gaseous medium in particular for increasing the pressure of the cleaning liquid and for subsequent drying, can additionally be introduced at or next to the conveying device. This is indicated graphically in FIGS. 24d and 24e.
• Figure 24e shows the return, i.e. the suction operation of cleaning liquid or a liquid / and substance mixture.
• a specially provided suction device can also be used.
• Cleaning liquid can be supplied not only from a container, as shown in FIG. 24, but also from a line network, and cleaning liquid can also be supplied through a second and possibly a third line, as has been illustrated and explained with reference to other figures.

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• Cleaning By Liquid Or Steam (AREA)
• Coating Apparatus (AREA)
• Extraction Or Liquid Replacement (AREA)
• Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
• Pinball Game Machines (AREA)
• Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Applications Claiming Priority (5)

Publications (2)

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ID=3531931

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• 1995
  • 1995-02-10 AT AT95909703T patent/ATE172387T1/de not_active IP Right Cessation
  • 1995-02-10 WO PCT/EP1995/000485 patent/WO1995021701A2/fr active IP Right Grant
  • 1995-02-10 EP EP95909703A patent/EP0743881B1/fr not_active Expired - Lifetime
  • 1995-02-10 DE DE59503992T patent/DE59503992D1/de not_active Expired - Fee Related
  • 1995-10-17 WO PCT/EP1995/004060 patent/WO1996018936A1/fr active Application Filing

Non-Patent Citations (1)

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