EP0849079A1 - Drying unit - Google Patents

Abstract

The drying unit has a rectangular frame (114) supporting a number of heating rails (6,8), each having a main body provided by a section of an extruded hollow profile which is coupled to a heat source. The frame elements (122,124) extending parallel to the heating rails are provided by sections of the hollow profile used for the heating rails, which has ribs on the outside of the frame elements provided with air channels (22).

Description

The invention relates to a dryer unit according to the Preamble of claim 1.

Such a dryer unit is in DE 44 42 940 A1 described.

In practice, the frame consists of metal parts, for each frame size and the respective application will be produced. For this reason, the framework is proportionate expensive.

The present invention aims to provide a dryer unit further developed according to the preamble of claim 1 be that the frame is cheaper to manufacture.

According to the invention, this object is achieved by a dryer unit with the features specified in claim 1.

In the dryer unit according to the invention, they are parallel to the sides of the frame Sections of a hollow profile formed, as it is for the production of the main strips of the heating strips is used. You can thus one and the same hollow profile material use for different purposes what warehousing and purchase price influenced favorably. Because that used Hollow profile next to a closed center Channel that is used as an air channel in the groin main bodies is used, has further ribs the hollow profile high mechanical strength.

Advantageous developments of the invention are in the subclaims specified.

The orientation specified in claim 2 to the heating strips parallel frame parts is high in terms of Mechanical resilience of these frame parts is an advantage: With this orientation lie those carried by the hollow profile Blowing ribs at a distance parallel to the frame plane, so that one against deflection by the blowing ribs improved area moment of inertia.

With the development of the invention according to claim 3 on the one hand achieved that standard hollow profile sections optionally as a strip main body and as a heating strip can use parallel frame parts. Furthermore, can one through the frame parts parallel to the heating strips also blow out additional air, which means the drying of Printing sheet or coated sheet improved, that Removing used dry air favors and for cooling of the mechanical parts of the dryer unit.

With the development of the invention according to claim 4 easily a transversal to the heating bars Distribution box formed, over which the in the groin bodies provided air channels equally with a Air source are connectable. You get simple If desired, also a flow coupling the marginal, parallel to the heating strips, Frame parts with the distribution chamber.

You can use the front parts of this dividing chamber position wall panels according to claim 5 in a simple manner and determine which spaced parallel to Frame level and the lower or upper boundary wall form the distribution chamber.

According to claim 6, a distribution chamber can be different Length simply using standard dimensions build up wall plate segments.

The development of the invention according to claim 7 is again in view of the low manufacturing costs of the wall panel segments an advantage with high dimensional accuracy. The high dimensional accuracy is essential with regard to airtight assembly of a wall plate Wall plate segments without additional sealing measures from Advantage.

The development of the invention according to claim 8 allows it easily and without additional mechanical Processing of the wall plate segments, these with the vertical wall plates of the distribution channel running to the frame level connect to.

According to claim 9 you get a precise in a simple manner Alignment of the heating strips and those parallel to them Frame parts at low cost.

The development of the invention according to claim 10 allows it, a frame either entirely or mixed with IR emitter elements load-bearing heating strips (infrared heating strips) and hot air heating strips. A change in Assembly can still be carried out on site as required respectively.

The development of the invention according to claim 11 allows it, the heating strips of a dryer unit under different Distance from a reference surface (usually the conveying surface of products to be dried). This makes it possible, in particular, for IR radiator elements load-bearing heating strips and hot air heating strips different Specify the distance from the reference surface. Man but can also heat strips of the same type along the conveying path of the products past the dryer unit arrange at different distances from the conveyor level and so first gentle drying and in last part of the conveyor line a hard residual drying carry out.

Is used according to claim 12 for the different extruded profile materials aluminum, so draw the parts made from them through good heat conduction and high mechanical strength, in particular also insensitivity to impacts and fatigue fracture, out. These profile materials can also be too special manufacture reasonable prices.

The development of the invention according to claim 13 is with a view to clear and compact installation of electrical lines on the dryer unit (e.g. heating cartridges or IR emitter elements carried by it) advantageous.

Figur 1:

eine seitliche Ansicht einer Infrarot-Heizleiste zur Verwendung in einem Trockner für eine Druckmaschine, teilweise in unterschiedlichen Ebenen geschnitten;

Figur 2:

eine Aufsicht auf die Unterseite eines Leistenhauptkörpers der in Figur 1 gezeigten Heizleiste;

Figur 3:

eine Aufsicht auf die eine Stirnseite der in Figur 1 gezeigten Heizleiste;

Figur 4:

eine seitliche Ansicht einer Heißluft-Heizleiste zur Verwendung in einem Trockner für eine Druckmaschine, teilweise geschnitten;

Figur 5:

eine Aufsicht auf die Stirnseite eines Gehäusehauptkörpers der Heizleiste nach Figur 4 ;

Figur 6:

einen transversalen Schnitt durch die in Figur 4 gezeigte Heizleiste längs der dortigen Schnittlinie VI-VI;

Figur 7:

eine Aufsicht auf eine Trocknereinheit, die sowohl mit Heißluft-Heizleisten als auch mit IR-Heizleisten bestückt ist;

Figur 8:

eine seitliche Ansicht der in Figur 7 gezeigten Trocknereinheit;

Figur 9:

eine Aufsicht auf die innenliegende Wandplatte eines Verteilerkanales der in Figur 1 gezeigten Trocknereinheit;

Figur 10:

eine Aufsicht auf eine außenliegende Wandplatte, welche zusammen mit der in Figur 9 gezeigten Wandplatte den Verteilerkanal in Längsrichtung begrenzt;

Figur 11:

eine Aufsicht auf eine innenliegende Wandplatte eines hohlen seitlichen Rahmenteiles der in Figur 1 gezeigten Trocknereinheit;

Figur 12:

eine Aufsicht auf eine außenliegende Wandplatte, die zusammen mit der Wandplatte nach Figur 11 das hohle Rahmenteil in Längsrichtung begrenzt;

Figur 13:

eine Aufsicht auf die Stirnseite eines Hohlprofil-Abschnittes, wie er zum Verschließen der Enden des Verteilerkanales verwendet wird;

Figur 14:

eine seitliche Ansicht eines Wandplattensegmentes in einer Ausrichtung, wie sie zur Bildung einer unteren Verteilerkanal-Wandplatte verwendet wird;

Figur 15:

eine seitliche Ansicht eines Wandplattensegmentes in einer Ausrichtung, wie sie zur Bildung einer oberen Verteilerkanal-Wandplatte verwendet wird;

Figur 16:

einen Quermittelschnitt einer ausschließlich mit IR-Heizleisten ausgerüsteten abgewandelten Trocknereinheit;

Figur 17:

eine Aufsicht auf die Trocknereinheit gemäß Anspruch 16;

Figur 18:

einen Quermittelschnitt einer Trocknereinheit, welche ausschließlich mit Heißluft-Heizleisten ausgestattet ist;

Figur 19:

eine Aufsicht auf die in Figur 18 gezeigte Trocknereinheit;

Figur 20:

eine Aufsicht auf die im eingebauten Zustand innenliegende Seite eines Adapterstückes zum Anbringen von Heißluft-Heizleisten an dem Verteilerkanal der Trocknereinheit nach Figur 7;

Figur 21:

eine Aufsicht auf das in Figur 20 gezeigte Adapterstück; und

Figur 22:

eine seitliche Ansicht des in Figur 20 gezeigten Adapterstückes.

The invention is explained in more detail below on the basis of exemplary embodiments with reference to the drawing. In this show:

Figure 1:

a side view of an infrared heating strip for use in a dryer for a printing press, partially cut in different planes;

Figure 2:

a top view of the underside of a strip main body of the heating strip shown in Figure 1;

Figure 3:

a plan view of one end of the heating bar shown in Figure 1;

Figure 4:

a side view of a hot air heating bar for use in a dryer for a printing machine, partially cut;

Figure 5:

a plan view of the end face of a housing main body of the heating strip according to Figure 4;

Figure 6:

a transverse section through the heating strip shown in Figure 4 along the section line VI-VI;

Figure 7:

a top view of a dryer unit, which is equipped with both hot air heating strips and IR heating strips;

Figure 8:

a side view of the dryer unit shown in Figure 7;

Figure 9:

a plan view of the inner wall plate of a distribution channel of the dryer unit shown in Figure 1;

Figure 10:

a plan view of an outer wall plate, which together with the wall plate shown in Figure 9 delimits the distribution channel in the longitudinal direction;

Figure 11:

a plan view of an inner wall plate of a hollow side frame part of the dryer unit shown in Figure 1;

Figure 12:

a plan view of an outer wall plate, which together with the wall plate according to Figure 11 delimits the hollow frame part in the longitudinal direction;

Figure 13:

a plan view of the end face of a hollow section section, as used for closing the ends of the distributor channel;

Figure 14:

a side view of a wall plate segment in an orientation as used to form a lower manifold wall plate;

Figure 15:

a side view of a wall plate segment in an orientation as used to form an upper distribution channel wall plate;

Figure 16:

a cross-sectional view of a modified dryer unit equipped exclusively with IR heating strips;

Figure 17:

a top view of the dryer unit according to claim 16;

Figure 18:

a cross-sectional view of a dryer unit, which is exclusively equipped with hot air heating strips;

Figure 19:

a plan view of the dryer unit shown in Figure 18;

Figure 20:

a top view of the inner side of an adapter piece in the installed state for attaching hot air heating strips to the distribution channel of the dryer unit according to FIG. 7;

Figure 21:

a plan view of the adapter shown in Figure 20; and

Figure 22:

a side view of the adapter shown in Figure 20.

An infrared heating strip 6 is shown in FIGS. 1-3, which is a total of 10 designated housing which has an IR radiator rod 12.

The housing 10 has a ledge main body 14 which passes through Cutting an extruded aluminum profile to length or an aluminum alloy is obtained. The endless profile has a central air duct 16. To the in Figure 1 underlying flat boundary surface of the groin main body 14 are two parallel ones running in the longitudinal direction Blow channel ribs 18, 20 are formed and in these are in regular distance using a boring machine Blow ducts 22 drilled, the upper ends in the air duct 16 open out.

Between the blow channel ribs 18, 20 are lying on the lower boundary surface of the last main body 14 two lower positioning ribs 24 formed between them two at the two ends of the inguinal main body 14 Find holding blocks 26, the screws 28 on Tapped holes 30 are screwed between the Positioning ribs 24 in the end portions of the housing main body 24 are provided. Wear the support blocks 26 each two retaining springs 32, which face each other U-shaped end sections each one of the sides of the oval cross section having radiator rod 12 resilient reach around.

The end faces of the main strip body 14 are with Adapter parts 34 connected, between the latter and the end face of the inguinal main body 14, respectively a flat gasket 36 made of silicone rubber is arranged. The adapter parts 34 are connected to the housing main body via screws 38 14 releasably connected and each have a molded-in air duct 40 that is not with a Blown air source shown is connectable.

The two side surfaces are on the last main body 14 retaining grooves 42 formed to accommodate a Serve nut or a screw head so that at the Side of the last main body further components as required can be screwed on, e.g. Cover plates.

A hot air heating strip 8 is shown in FIG. 4, which is constructed according to a similar principle as that in the Figures 1-3 shown infrared heating bar. Functional equivalent main ledge components are included provided the same reference numerals and will not be repeated described in detail, even if they are in structural Differentiate details from the first embodiment.

The extruded profile made of aluminum or an aluminum alloy, from which the last main body 14 is made has seen in transverse sectional view the shape of a rectangle with a triangle at the bottom. At the lowest point of the groin main body is one only blow channel rib 18 formed on both sides a holding groove 42 is formed in each case.

There are two in the top of the groin main body milled rectangular windows 44, and in this wall segments 46 are inserted, which is a smooth Continuation of both the air duct 16 and the outer surface of the housing guarantee. To do this, the wall segments 46 an inner surface 48 curved according to the air duct 16 and a flat outer surface 50. In the outer surface 50 is a cable groove 52 inserted into a cable hole 54 leads, which opens out to the inner surface 48.

Extend through the cable bore 54 and the cable groove 52 the connecting conductor not shown in the drawing for a heating cartridge 56, which have a similar structure can, as from hot air guns to dry Hair known. The heating cartridges 56 are on the wall segments 46 attached, e.g. glued to this. over the wall segments used in the last main body 14 46 is a flat gasket 58 made of silicone rubber arranged, and there is an outer cover plate 60, which with screws 62 with the last main body 14 connected is.

In the middle of the strip main body 14 is a locking disk 64 arranged, the outer contour of the cross-sectional contour the air duct corresponds to 16 and which by two their end faces overlapping screws 68, 70 axially is positioned.

As indicated in Figure 6 by dashed lines, surrounds an outer case 72 which is bent from sheet metal, the outer surfaces of the inguinal main body at a distance 14 and is held by slidably in the holding grooves 42 Nuts 74 and screws cooperating with them 76 connected to the groin main body 14.

In FIG. 7 there is a total of 110 dryer units referred to, which for drying printing inks and / or Printing varnishes determined in a multicolour printing machine is (for intermediate drying or final drying). The path of the printed products is indicated by an arrow 112 indicated. In practice, a plurality of dryer units 110 along the conveying path of the printed products be arranged sequentially. In this case then these dryer units first with hot air heating strips and in a later section of the funding path Equip them with IR heating strips to start with the largest Volatilize part of the liquid to be removed and then carry out a residual drying.

In the dryer unit shown in Figure 7, e.g. as an intermediate dryer unit between successive Printing stations of a printing press can be used, is an upstream section with hot air heating bars 8 as referenced above 4 to 6 have been explained, and a downstream Section is equipped with IR heating strips 6, as with reference to Figures 1 to 3 above have been explained.

The heating strips 6 and 8 are 114 in total designated frame worn.

The frame 114 has a hollow one on the left in FIG Frame part 116 and a lateral one on the right in FIG. 7 Frame part 118, which is also hollow and forms an air distribution duct 120. To the heating strips 6, 8 parallel frame parts 122, 124 connect the frame parts 116, 118 to a fixed frame. The frame parts 122, 124 are made of the same hollow profile material, which also for the production of inguinal main bodies is used. In the embodiment considered here is the last body profile for the frame parts 122, 124 used for the IR heating bars like it is shown in Figure 3. This profile stands out due to the off-center blowing ribs 18, 20 by special high strength with low weight.

As can be seen from the drawing, the IR heating strips 6 via the adapter parts 34 with the frame parts 116 and 118 connected. The same adapter parts 34 are also between the ends of the frame parts 122, 124 and the frame parts 116 and 118. The frame parts 122, 124 are also with blowing channels 22 trained. So you can do the same Profile sections optionally as a strip main body for IR heating strips or use as frame part 122 or 124.

The frame part 118 consists of two lateral, that is parallel to the conveying direction 112 and perpendicular to the axes the heating strips running wall panels, namely one inside wall plate 128 and an outside Wall plate 130. It also includes a segmented lower wall plate 132 and one in Figure 7 only partially shown segmented top wall plate 134. The ends of the frame part 118 are closed by end pieces 136, which sandwiched and tightly between the wall panels 128 and 130 are inserted.

As seen in Figure 7, the frame members 122, 124 against the Heizleistenkörpern the IR heater bars 6 +/- 90 ^o are twisted so that their Blasrippen 18, 20 are outside of the frame and are parallel to the frame plane.

As can be seen from FIG. 9, the wall plate has 128 openings 138, via which it connects with the longitudinal channels 16 the IR heating strips 6 or the hot air heating strips 8 in Connection is established. The openings 138 are each of four through openings 140a, 140b, 140c, 140d for Fastening screws (not shown) surrounding the Push through adapter pieces 34 and into the ends of the IR heating strips 6 are screwed in or with the adapter parts 126 are screwed.

There is also a set of through openings for each heating strip 142a, 142b provided for the attachment of Wall plate segments serve, as described in more detail later becomes.

The wall plate 128 has, however, are ^o tilted in their end portions, openings 144, which correspond to the openings 138 in the geometry by 90 so that they 122 are aligned with the longitudinal channels of the frame parts 124th The openings 144 are surrounded by through openings 146a, 146b, 146c and 146d, to which the frame parts 122, 124 are screwed.

The rear wall plate 128 is also patterned at through openings which correspond to the through openings 142 and 146 correspond. Furthermore, the rear one Wall plate 130 a large opening 148, which (see Figure 7) with a connector 150 in connection stands.

The connector 150 includes an axial port and a connection opening pointing downwards in the drawing, of which one (according to the respective Operating conditions) closed by a blind plate 152 is, while the other carries a connecting piece 154.

The end pieces 136 are made of a hollow profile material Cut to length, which is that shown in FIG Cross section.

A side base portion 156 is two in figure 13 horizontal legs 158, 160 connected. The transition areas between the base section 156 and the Legs 158, 160 are triangular, so that in they are provided with mounting holes 162c and 162d can. Similar mounting holes 162a, 162b are located thickened areas of the legs 158, 160. Die Location of the mounting holes 162 corresponds to the location of the through openings 146. In this way, the End pieces 136 with long screws, not shown the wall plates 128 and 130 and by the adapter parts 34 connected to the frame parts 122, 124 and be tense.

A web 170 runs from the upper leg 158 up, in which another mounting hole 172 and a horizontal receiving groove 174 in FIG. 13 are provided is. Similarly, in the thickened end portion of the lower leg 160 a mounting hole 176 and a receiving groove 178 is provided. About the mounting holes 172, 176, whose distance is the distance between Corresponds to through openings 146a and 146c or 146b and 146d, can the end pieces 136 additionally with the wall plates 128, 130 can be connected.

The hollow frame part 216 on the left in FIG. 7 is similar to the frame part 218; only they are End pieces 136 somewhat narrower.

If desired, however, the frame part 216 can be made exactly Provide a mirror image of the frame part 218, i.e. also with a second connector. This alternative is particularly suitable for dryer units that are continuous are equipped with hot air heating strips.

In a further modification, the frame part 216 can also be used only give a mechanically load-bearing function and then off Build up wall panels 128 'and 130' as shown in the figures 11 and 12 are shown. These correspond to the pattern of Through openings 140, 142, 146 the wall plates 128 and 130, but have no openings 138, 144, 148, so that they have the heating strips 6 and 8 and the frame parts Seal 122, 124 at the adjacent end. This alternative is suitable for pure IR dryer units.

The lower wall plate 132 and the upper wall plate 134 consist of individual interlocking wall plate segments 180 (see FIGS. 14 and 15) by cutting to length are made from an extruded aluminum profile.

Figure 14 shows an alignment of the wall plate segments, such as is used for the realization of the lower wall plate 132 in Figure 15 is identical, but shown by 180 ^o twisted wall plate segment, as it is used to realize the upper wall plate 134th

When assembled, one engages in the Figures 14 and 15 narrow end section on the left a wall plate segment 180 into a receiving groove 182 of the neighboring wall plate segment. Furthermore, in the wall plate segments 180 in the vicinity of the Receiving groove 182 mounting holes 184 provided, over which the wall plate segments 180 with the through openings 142a and 142b of the wall plates 128, 130 screwed can be.

This way, using wall plate 128, 130 of different lengths, but otherwise using the same standard components, dryer units Realize 110 in the conveying direction 112 of printed products have different dimensions.

Figures 16 and 17 show how to use the same frame 114 as described above a dryer unit 110 can realize that is only equipped with IR heating strips 6. The the left frame part only consists of the wall plate 128 '.

Figures 18 and 19 show the exclusive assembly a frame 114, as described above, with hot air heating strips 8. The left frame part 116 * includes one Wall plate 128 and a wall plate 130 '. The frame parts 122 and 124 are formed without blow channels 22. So that is done an air supply to those on the left in the drawing Ends of the heating strips 8 from the frame part 118 the frame parts 122 and 124 and the frame part 116 *, and you only need a connector 150, which is the installation simplified in the press. If you want one exactly symmetrical exposure of air to the heating strips 8 the frame part 116 is an exact mirror image of the frame part 116 built and the air supply to the left ends of the Heating elements 8 then takes place via the second connecting part 150 of the frame part 116.

As can be seen in particular from FIG. 7, the hot air heating strips are 8 closer to the conveyor level of the printed products arranged as the IR heating strips 6. This is done characterized in that the hot air heating strips 8 over that of the Adapter parts 34 different adapter parts 126 with the lateral frame parts 116, 118 are connected, which Figures 20 to 22 show in more detail.

The adapter parts 126 each have a flange plate 186, which have through openings 188a, 188b, 188c, 188d is provided, the position of which is that of the through openings 142a, 142b, 142c and 142d.

The flange plate 186 carries a double cranked tubular Transition piece 190 with a free end section 192, in the longitudinal channel 16 of the hot air heating strips 8 fits.

By using different adapter parts 126, in which the angle of attack of the transition piece 190 indicated in the drawing with 30 ^o is chosen to be smaller or larger, the distance between the different hot-air heating strips 8 from a flat conveying surface of the products can also be selected differently. Conversely, if the conveying surface of the printed products is curved, the ends of the blowing channels 22 of successive heating strips can be set differently using different adapter pieces 126, depending on the curvature of the conveying surface.

Similar adapter parts to adapter parts 126 can be used also use in conjunction with IR heating strips 6, then at the second end of the transition piece 190 second flange plate is attached, which is the flange plate 186 corresponds.

Claims (13)

Dryer unit with a rectangular seen in supervision Frame (114) and a plurality of the frame (114) worn heating strips (6, 8), each one Last main body (14) having a portion of a extruded hollow profile, and with a heat source (12; 56) is connected, characterized in that Frame parts running parallel to the heating strips (6, 8) (122, 124) through sections of a hollow profile is formed, as it is for the production of inguinal bodies (14) is used. Dryer unit according to claim 1, characterized in that the hollow profile has blowing ribs (18, 20; 18), and the blowing ribs (18, 20; 18) on the outside the frame parts (122, parallel to the heating strips (6, 8) 124). Dryer unit according to claim 2, characterized in that the blowing ribs (18, 20) of the side frame parts (122, 124) are provided with blown air channels (22). Dryer unit according to one of claims 1 to 3, characterized in that at least one of the transverse frame parts running to the heating strips (6, 8) (116, 118) is formed by wall plates (128, 130), one of which is the heating strips (6, 8) and the side ones Frame parts (122, 124) facing with openings (138) is provided with the longitudinal channels (16) of the heating strips (6, 8) and preferably also the side frame parts (122, 124) and that the End faces of this side, to the heating strips (6, 8) transversal, frame part (118) through end pieces (136) is closed, which sections of an endless profile which have a substantially U-shaped cross section, the open side of the U facing the inside of the above Frame part (118) has, and the end pieces (136) between End sections of said wall plates (128, 130) of the frame part running transversely to the heating strips (6, 8) (118) lie. Dryer unit according to claim 4, characterized in that the endless profile on at least one, preferably molded on both of its legs (158, 160) Recordings (174, 178) for each end of parallel has wall plates (132, 134) lying at the frame level. Dryer unit according to claim 5, characterized in that the parallel to the frame level Wall plates (132, 134) through wall plate segments (180) are formed, which have a receptacle at a first end (182) are provided which lead to the first end opposite second end of the wall panel segments (180) is complementary. Dryer unit according to claim 6, characterized in that the wall plate segments (180) sections an extruded profile bar. Dryer unit according to claim 6 or 7, characterized in that the wall plate segments (180) preferably mounting holes at one end (184). Dryer unit according to one of claims 4 to 8, characterized in that the ends of the heating strips (6, 8) adjacent, perpendicular to the frame plane standing wall plate (128) holes (142) for fasteners over which the heating strips (6, 8) can be connected to this wall plate (128). Dryer unit according to claim 9, characterized in that IR radiator elements (12) carrying heating strips (6) and hot air heating strips (8) the same in their end faces Have patterns of mounting holes. Dryer unit according to one of claims 1 to 10, characterized in that at least part of the Heating strips (6, 8) via hollow adapter pieces (126) to the to the heating strips (6, 8) transverse frame parts (116, 118) is attached, which is a displacement of these heating strips (8) in the direction perpendicular to the frame plane. Dryer unit according to one of claims 1 to 11, characterized in that the profile materials are extruded from aluminum. Dryer unit according to one of claims 1 to 11, characterized in that the parallel to the Heating strips (6, 8) extending frame parts (122, 124) of a hollow profile having two blowing ribs (18, 20) are cut to length and the space between the Blow ribs (18, 20) serves as a cable duct.

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