APPARATUS FOR THE SHAPING OF ARTICLES OF HYGIENE

Abstract: In an apparatus for the shaping and compacting of absorbent pads (C, C', C'') for absorbing body fluid, which are intended for articles of hygiene and which consist of a plurality of part layers (C-1, C-2, C-3) and, if appropriate, are treated with a superabsorbent agent, to form at least one absorbent-pad layer (C-1, C-2, C-3) a rotary band (A1) has arranged on it over the entire length of the rotary band, at distances from one another, trough-shaped insertion moulds (20-1, 20-2, 20-3), into which shaping insets (22) can be inserted. Along the rotary band (A1) production devices (11, 12-1, 13, 30; 11, 12-2, 13, 30; 14, 15; 16, 17, 30; 11, 12-3, 13, 30; 18, 18'; 27, 28, 28', 31; 19, 19', 19'') are arranged, in twos respectively along the linear outward path and return path, and in the opposite direction to the rotary band (A1) there is a driving band (A2) which can be pressed against this, and furthermore there is arranged a thermal compacting device (40) which has calender and/or embossing rollers (50, 50') following in the conveying direction and which consists of a heating cylinder (41) with a pressure band (A3) arranged on it.

Description: - I - DESCRIPTION A pparatus for the shaping of articles of hvcriene The invention relates to an apparatus for the shaping and compacting of absorbent pads for absorbing body fluid which consist of a plurality of part layers and which is intended for articles of hygiene, according to the pre-characterizing clause of Patent Claim 1. There are known apparatuses for the production of articles of hygiene, in which a web of material resembling an absorbent pad is guided continuously through a severing device, and the lateral edge regions of the web of material are thereby severed to the desired shape, for example for shaping the leg portions into a bobbin-like form for disposable napkins. Severing is carried out by punching out or sawing or by means of water-jet or air-jet cutting in an additional device, and at the same time hard edges can be obtained at the cutting points as a result of the compacting of the flocks. In continuous production, a severing device of this type can give rise to faults, and material waste is unavoidable, thus entailing an undesirable outlay and increasing the operating costs. So that the absorbent pads do not have to be machined by shaping cutting during production, for example German Offenlegungsschrift 3,710,055 provides an apparatus for the continuous production of sanitary towels, in which a plurality of flock-depositing stations arranged over the circumference of a rotatable suction drum and having an air-permeable bottom are used. Each depositing point is equipped with a tool set which is mounted firmly on the suction drum and which comprises at least one shaping-shoe/flock-template unit, a press ram and a welding and, if appropriate, severing tool. With such an arrangement of the individual processing devices, because of the complicated tool sets connected to lifting motors via lifting rods a conversion of the apparatus to other articles of hygiene demands a large amount of time and is possible only to a restricted extent, with the result that apparatuses of this type are only ever used as single-purpose machines. A further disadvantage is that the feeding of superabsorbent agents from the periphery of the suction drum into the absorbent pads cannot be achieved to the best possible degree. The superabsorbent agent is intro¬ duced into a particular shaping recess and then trans¬ ferred from this onto the flock web. This solution does not always ensure an exact filling of the shaping recesses, and therefore the quantity of this agent can fluctuate in the articles produced. Another embodiment of an apparatus for the production of absorbent pads for absorbing body fluid is known from DE 1,413,925 Al. The apparatus consists of two so-called flock applicators of identical design, each of the two flock applicators being designed as a suction cylinder which has shaping recesses and which forms the so-called flock wheel. A first part layer of the absor¬ bent pad to be produced is sucked onto the first flock wheel, and a second part layer is sucked onto the second flock wheel. By means of a transfer roller, the part layers produced on the first flock wheel are applied to the part layers produced on the second flock wheel. A further transfer roller lifts off the finished absorbent pads from the second flock wheel and transfers them to a further-processing machine by means of a suction belt. A possible addition of a superabsorbent agent can be provided between the two part layers forming the absorbent pads. The apparatus is a single-purpose machine which is suitable only for a few articles of hygiene of similar design, but a more comprehensive conversion of the apparatus for different articles is hardly expedient. Another disadvantage is that only absorbent pads consisting of two part layers can be produced, because it is scarcely possible to connect further flock wheels and transfer rollers, especially where part layers of differing size are concerned. A thermal compacting device which can be built into a continuous production line and is intended for an absorbent-pad web treated with superabsorbent agent and which makes use of a hot-air throughflow principle is likewise known. The air throughflow warms through on both sides, on two perforated drums, the absorbent pads connected in the form of webs and, if appropriate, equipped with covering webs on both sides, so that a heating to the compacting temperature takes place. The cellular/synthetic pulp mixture is compacted thermally, and at the same time the superabsorbent agent is fixed in at predetermined points of the absorbent pad. This apparatus is unsuitable for the thermal compacting of individual absorbent pads conveyable at a distance in succession and, if appropriate, also next to one another or covered with a covering web on only one side. The object on which the present invention is based is, therefore, to provide an apparatus for the shaping and thermal compacting of absorbent pads for absorbing body fluid and intended for articles of hygiene, which serves for continuous production and in which the absorbent pads can be equipped individually with covering webs either on one side or on both sides, in which the individual production devices are designed so that they can be connected and disconnected for different articles of hygiene in minimum conversion times, and in which the laying-on accuracy even of part layers of differing size will be guaranteed, especially where absorbent pads formed from a plurality of, preferably three, part layers are concerned. At the same time, a feed of superabsorbent agents which is selectable as required will be possible, and the thermal compacting device will be integratable into the apparatus without impairing the production capacity. The material used for the absorbent pads and referred to as "flocks" preferably consists of a cellular/synthetic pulp mixture, but any other combination would also be possible. According to the invention, this object is achieved by means of the features indicated in the ■ - H - characterizing clause of Claim 1, whilst the remaining claims relate to advantageous further embodiments of the apparatus. The advantage of the apparatus according to the invention is that the rotary band having toothings on both surfaces and guided in two planes lying parallel to and above one another on the one hand engages into the teeth of a toothed driving roller via a toothing directed to the inner surface and is guided via a further per- forated roller, and by means of its toothing located on the outer surface both toothed flock-metering rollers and a driving band are driven non-positively, thereby guaran¬ teeing a perfect shape of the absorbent pads. A work cycle synchronized in this way always guarantees an accurate construction of multi-layer absorbent pads from a plurality of part layers even of different sizes. A further advantage of an arrangement of this type is that the individual devices, such as flock- metering devices, metering units for a flock-material/- superabsorber-powder mixture, a superabsorber-powder spreading device or superabsorber web portions, and the feeding of covering webs on one side or on both sides can be connected or disconnected, as required, without the apparatus having to be converted. Because the uncompacted absorbent pads are first sucked into the trough-shaped insertion moulds via the vacuum chambers arranged in the first plane and subse¬ quently, after rotation of the rotary band through 180 * , cure sucked out of the insertion moulds onto the driving band via the vacuum chamber arranged in the second plane, the absorption, properties of the absorbent pad can be influenced on both sides, as required, depending on the adjustable suction effect. Whenever the article of hygiene to be produced is changed, it is predominantly necessary only to exchange the air-permeable shaping insets insertable into the trough-shaped insertion moulds, only short apparatus standstill times being necessary for this. If this is not sufficient, a conversion of the apparatus can be carried out by exchanging the rotary band equipped with insertion moulds, in which case only the individual horizontally arranged devices have to be adapted to the insertion moulds of the new rotary band. Especially effective for the most efficient possible conversion to different articles of hygiene is a possible embodiment which is in addition to that of Figure 1 and in which, instead of one rotary band, a plurality of, for example, three mutually independent individual rotary bands are arranged in succession in the conveying direction, and simple conversion can be carried out by the insertion of insets and/or the exchange of the individual rotary bands. In an advantageous way, the individual absorbent pads can be equipped individually, on one side or on both sides, with covering webs, preferably non-woven webs, between the rotary band and driving band or between the pressure band and heating cylinder of the thermal com¬ pacting device and can be moved further thus. The invention is explained in detail below by means of exemplary embodiments with reference to the drawings. In these: Fig.l shows a longitudinal section through the apparatus, Fig. la shows a partial plan view of the apparatus according to Fig. 1, Fig. lb shows a cross-section through a rotary band designed as a toothed belt along the sectional line I-I in Fig. 1, Fig. lc shows a cross-section of the rotary band along the sectional line II-II in Fig. 1, Fig. 2 shows a longitudinal section through the rotary band equipped with insertion moulds, Fig. 2a shows a plan view of the rotary band according to Fig. 2, Fig. 2b shows a cross-section of the rotary band along the sectional line III-III in Fig. 2a, Fig. 3 shows a longitudinal section through a develop- - G - ment of the apparatus according to Fig. 1 and Fig. 3a shows a partial plan view of the apparatus according to Fig. 3. The apparatus according to the invention consists of two processing parts 10 and 40 coupled to one another, specifically of a shaping section 10 and of a thermal compacting section 40. The apparatus 10, 40 can be used in continuously working production lines known per se for the production of articles of hygiene, and the conven- tional laying-on devices for forming absorbent pads with an appropriate severing device for producing the desired shape, for example for forming the leg portions for napkins, and a conventional thermal compacting device for articles of hygiene guided in the form of webs over perforated drums can be omitted and replaced by the apparatus according to the invention. According to Figs. 1, la, lb and lc, the apparatus 10,40 consists of a rotary band Al which is equipped in the conveying direction (from right to left in the drawing) with trough-shaped insertion moulds 20 at distances from one another. For articles of hygiene of smaller dimensions, the insertion moulds 20 in the rotary band Al could also additionally be arranged at distances next to one another (not shown) . A toothing zl, z2 is provided at each of the two edges of the rotary band Al, the rotary band Al preferably being designed as a toothed belt. In a closed transport loop of the rotary band Al, the production device parts are arranged in two working planes above one another along the path of rotation of the transport band Al. The rotating rotary band Al equipped with insertion moulds 20 is guided in the upper working plane, in the direction of rotation, past successive production devices 11, 12-1,13,30;11,12-2,13,30; 11,12-3 13,30 for the suction filling of the insertion moulds 20 with flock material, for the formation of absorbent pads C, for the feeding of superabsorbent agents in the form of a flock- material/superabsorber-powder mixture via the metering - ~~ - roller 12-2 by means of a metering unit with a spreading device 14,15 or for the feeding of superabsorber web portions by means of a metering unit with an unwinding device 16 and a laying-on device 17. An unwinding device 18 equipped, for example, with a pneumatic brake 18' and intended for feeding a first covering web B, preferably a non-woven web, can be arranged (as represented by broken lines) in the upper working plane after the last production section. In the return of the rotary band Al, an ejector 27,28,28',31 for shaped absorbent pads C is arranged in the lower working plane of the shaping apparatus 10. Here, the absorbent pads C are on the one hand removed from the insertion moulds 20 of the rotary band Al by means of a blow-out device 27 arranged in the perforated roller 24 and on the other hand are removed from the driving band A2 as a result of the suction effect of a vacuum chamber 31. A suction device 28 with a return line 28' ensures freedom from dust. A second covering web B' arranged in front of the thermal compacting part 40 can be fed to the absorbent pads via a deflecting roller 19" by means of a further unwinding device 19,19'. The absorbent pads C,C',C N can be conveyed further individually, equipped with covering webs B,B' on one side or on both sides. The rotary band Al is driven by means of a toothed driving roller 23 and is guided via the per¬ forated roller 24. The toothing z of the driving roller 23 engages into the toothing zl of the rotary band Al. By means of the toothing z2 arranged on the outer surface of the rotary band Al, the metering rollers 12-1,12-2,12-3 for the flock material, equipped for this purpose with similar toothings z4, are driven positively, and via a tensioning roller 25 and deflecting rollers 26 the driving band A2 equipped with a similar toothing z3 is positively driven, so that all the important production operations necessary for shaping the absorbent pads C take place in exact synchronism. The individual production devices 11, 12-1,13-30;11,12-2,13,30;14,15;16, - ' - 17,30;11,12-3,13,30;18,18';27,28,28'31; 19,19',19"; can be connected and disconnected according to the require¬ ment of the particular article to be processed. Air- impermeable spacer pieces 21 consisting, for example, of an elastic plastic are inserted between the insertion moulds 20 in the rotary band Al. The bottoms 20" of the insertion moulds 20 are formed by a web, preferably a netted web D, air-permeable over the entire length of the rotary band A2 (sic). Depending on the desired shape of the absorbent pad, air-permeable shaping insets 22, preferably consisting of a foam material, are inserted on the bottoms 20" (web D) of the insertion moulds 20. The rotary band Al equipped with insertion moulds 20 is described in more detail by reference to Figure 2, 2a and 2b. Arranged in the upper working plane of the rotary band Al, for forming absorbent pads C from at least one layer or, as shown in Figs. 1 and la, from three part layers C-1,C-2,C-3, are production devices 11,12-1,13- 30;11,12-2,13,30;11,12-3,13,30; which consist respectively of a supply vessel 11 for the flock material, preferably pulp, produced in suitable mills in material preparation (not shown) and of at least one metering roller 12, in the present case of three metering rollers 12-1,12-2,12-3 which are each arranged in a housing 13 and which interact with a vacuum chamber 30 located underneath the rotary band Al. Each metering roller 12 has a toothing z4 (Figs, lb, lc) which is in engagement with the rotary band Al having the insertion moulds 20 bymeans of the outer toothing z2. The quantity of flock material to be introduced corresponds respectively to the corresponding part volume region 20-1,20-2,20-3 of the insertion moulds 20 for the part layer C-1,C-2,C-3 to be filled, that is to say, according to Figs. 1 and la, the filling quantity of the first metering roller 12-1 corresponds to the small part volume region 20-1 of the insertion mould 20 for the small part layer C-1 of the absorbent pad, the quantity from the second metering roller 12-2 corresponds to the larger - 3 - part volume region 20-2 of the insertion mould 20 for the larger part layer C-2 of the absorbent pad, and that of the third metering roller 12-3 corresponds to the large part volume region 20-3 of the insertion mould 20 for the large part layer C-3 of the absorbent pad. The production sections 12-1,12-2,12-3;13,14;16,17 for forming the absorbent pads C and for applying the superabsorbent agents in the form of a flock-material/superabsorber- powder mixture by spreading or by the laying on of superabsorbent web portions include the vacuum chambers 30 located underneath the rotary band Al and intended for the retention of the inserted material. In the lower working plane of the shaping apparatus 10, the vacuum chamber 31 located underneath the driving band A2 similarly belongs to the transfer device 27,28,28'. The vacuum chambers 30,31 are connected to a vacuum pump 34 via vacuum lines 32 and valves 33, the vacuum in the individual vacuum chambers 30,31 being controllable, thereby guaranteeing the most efficient possible suction of the absorbent pads or their part layers C-l,C-2,C-3 into the insertion moulds 20 or into their part regions 20-1,20-2,20-3 or out of the insertion moulds 20. After the shaped, but still uncompacted absorbent pads C have been transferred out of the insertion moulds 20 from the rotary band Al onto the driving band A2 by the ejector device 27,28,28',31, they pass into a thermal compacting device 40 which is coupled mechanically to the shaping apparatus 10. The thermal compacting device 40 consists of a double-walled heating cylinder 41, in which, for example, oil is used as a heating medium. The heating cylinder 41 has partially looping round it in its lower half a pressure band A3 guided via a driving roller 42, a tensioning roller 43 and a deflecting/tensioning roller 44 and via deflecting rollers 45. The absorbent pads C',C" guided between the pressure band A3 and the heating cylinder 41 can run through the thermal compacting device individually, covered with a covering web B or B' on one side or with the two covering webs B,B' on both sides. - lo ¬ in the region of the heating cylinder 41 and of the deflecting/tensioning roller 44 there is a guide 46, so that the absorbent pads C" can be guided in a controlled manner to following calender and/or embossing rollers 50,50'. An auxiliary transport device 29 is provided between the driving band A2 and the pressure band A3 of the compacting device 40, above the support 35 equipped with a suction device, so that the absorbent pads C can be conveyed further safely even without covering webs B,B'. The pressure band A3, preferably designed as a steel band, can be heated on one side or on both sides, preferably on its band face confronting the heating cylinder 41 by means of a heating device 48, for example eddy-current heating, with the result that the thermal compacting (thermobonding) of the cellular/synthetic pulp mixture of the absorbent pads C can take place in an accelerated manner, with the superabsorbent agent embed- ded in the absorbent pad being fixed at the same time. The heating device 48 consists of a plurality of units which are arranged over the width of the pressure band and which activatable opposite the associated face of the pressure band in accordance with the shape of the absor- bent pad. If all the articles of hygiene to be produced are also to be compacted thermally, the driving band A2 of the shaping apparatus 10 and the pressure band A3 of the thermal compacting device 40 could be replaced by a common pressure band. The rotary band Al designed as a toothed belt is shown in Figs. 2,2a and 2b on an enlarged scale in relation to Fig. 1. The rotary band Al has insertion moulds 20 which, for example, are suitable for three- layer absorbent pads C consisting of individual part layers C-1,C-2,C-3. The respective part regions 20-1,20-2,20-3 of the insertion moulds 20, into which the individual layers are inserted, as already described, consist of foam-like - /I - shaping insets 22 which are placed on the netted air- permeable web D. The insertion moulds 20-1 remaining free of insets 22 form their bottoms 20". The insets 22 can also be designed so that, depending on the function of the absorbent pad of the article of hygiene, they can be given a plane, inclined, curved, concave or convex and suchlike shape for a body fit, and the particular shape selected can be fixed in the thermal compacting device without any additional measures. Figs. 3 and 3a illustrate a design, additional to that of Figs. 1 and lb, of a shaping apparatus 10' which is especially suitable for articles of hygiene with a plurality of absorbent-pad part layers C-1,C-2,C-3. Instead of one rotary band Al according to Fig. 1, there are used, according to the number of absorbent- pad part layers C-1,C-2,C-3, for example three individual rotary bands A10-l,A10-2,Al0-3 which are arranged in succession in the conveying direction above a driving band A20 and in the opposite direction to which and facing which the perforated driving band A20 is provided in synchronism. The individual rotary bands AlO-l,A10-2,A10-3 have at their two edges toothings z5 which engage into the toothings z4' of the deflecting rollers 56'. The production devices (in the conveying direction) 18,18';- 11',12'-3,13,30;11',12'-2,13,30;14,15;16,17,30;11',12'- 1,13,30;19,19',19" are designed similarly to those shown in Fig. 1 and therefore need not be described in any more detail. Instead of the metering rollers 12-1,12-2,12-3, according to Fig. 1, there are used pairs of metering bands 12'-1,12'-2,12'-3 which interact with the insertion moulds 20'-1,20'-2,20'-3 of the individual rotary bands A10-l,A10-2,A10-3 and with the vacuum chambers 30. . The pairs of metering bands 12'-1,12'-2,12'-3 each consist of two endless bands with scraper pins arranged over the circumference, the flock material passing out of the material preparation (not shown) via a material feed 11' into the housing 13 of the metering unit and being guided in the direction of the arrow - Il- between the two endless bands to the insertion moulds 20';20'-l,20'-2,20'-3 of the individual rotary bands A10- l,A10-2,A10-3. The particular endless band located nearer the individual rotary band A10-l,A10-2,A10-3 has a higher rotational speed in relation to the other, so that the interengaging scraper pins of the two endless bands, by scraping off the excess material, guarantee a uniform material layer thickness. The shaping insets 52 correspond to the shaping insets 22 according to Fig. 1, these being inserted into the insertion moulds 20'; 20'-l, 20'-2,20'-3 of the individual rotary bands, as shown in Fig. 3 for the individual rotary bands AlO-1 and A10-2. If the individual rotary bands are already being used with adapted insertion moulds 20', as shown by way of example in Fig. 3 for the individual rotary band A10-3, there is no need for the shaping insets 52. The production sections are arranged above the driving band A20, the difference being that the work is carried out not in two working planes, but in one linear plane, and therefore the conveying direction is opposite to that of Fig. 1. The absorbent-pad part layers C-1,C- 2,C-3 do not remain in the trough-shape insertion moulds 20 (according to Fig. 1), but are built up gradually on the synchronously running driving band A20, so that the blow-out device 27 and the vacuum chamber 31 (according to Fig. 1) underneath the driving band A2 are omitted. The absorbent-pad part layers C-1,C-2,C-3 built up in layers on the driving band A20 are fed directly as uncompacted absorbent pads C to the compacting device 40 by means of the auxiliary transport device 29. The perforated driving band A20 is driven by means of a driving roller 57. By means of a gear wheel transmission, a deflecting roller 56' and a transmission roller 54 with a band transmission A4 are driven via a take-up roller 53. The deflecting roller 56' drives the first individual rotary band A10-3 (in the conveying direction). By means of the band transmission A4, a further deflecting roller 56' is driven via a further transmission roller 54' with a band transmission A4' and drives the second individual rotary band A10-2. By means of the band transmission A4', a further deflecting roller 56' is driven via a further transmission roller 54" and drives the third individual rotary band AlO-1 in synchronism. This ensures that both the individual rotary bands A10-l,A10-2,A10-3 and the perforated driving band A20 run synchronously, thereby guaranteeing a perfect formation and layering of the individual absorbent pads C. The individual rotary band A10-3 which is the first in the conveying direction, in its working position, is arranged directly above the perforated driving band A20, onto which the third absorbent-pad part layer C-3 is laid. The second individual rotary band A10- 2 is arranged at a distance from the driving band A20 corresponding to the thickness of the third part layer, so that the second absorbent-pad part layer C-2 comes to rest exactly on the third part layer C-3. The third individual rotary band AlO-1 is arranged at a distance from the driving band A20 corresponding to the thickness of the third and second part layers, so that the first absorbent-pad part layer C-1 too can be laid exactly onto the second part layer C-2. The suction effect of the vacuum chambers 30 is respectively set so that the formation of the absorbent pads C, their transport between the synchronously running individual rotary bands A10-3,A10-2,A10-1 and the driving band A20 and the transfer of the absorbent pads C to the compacting device 40 by means of the auxiliary transport device 29, as already described, are guaranteed perfectly. The force transmission of the individual rotary bands A10-l,A10-2,A10-3 is obtained respectively via toothings z5 which are arranged at the two edges of each of these and which are in engagement with the toothed deflecting rollers 56'. The actual individual rotary bands A10-l,A10-2,A10-3 are thereby largely relieved of tension, thus avoiding an undesirable distortion of these. The individual rotary bands A10-l,A10-2,A10-3 are - IV - lowered out of their initial positions into the appropriate working positions by means of lifting devices 58.

Claims: - ι5 " - PATENT CLAIMS 1. Apparatus for the shaping and thermal compacting of absorbent pads for absorbing body fluid, intended for articles of hygiene, especially for the production of body-shaped absorbent pads for disposable baby napkins and disposable adult napkins, sanitary towels, insert slips and the like, which is equipped with at least one treatment device for superabsorbent agents and with a thermal compacting device, characterized in that at least one rotary band (Al) or a plurality of individual rotary bands (A10-l,A10-2,A10-3) with receptacles for one (C) or a plurality (C-1,C-2,C-3) of absorbent-pad layers has over the entire length of the rotary-band, of Abstract at distances from one another, trough-shaped insertion moulds (20;20-1,20-2,20-3;20';20'-1,20'-2,20'-3), into which fit shaping insets (22,52), and along the rotary band (Al) or the individual rotary bands (A10-1,A10- 2,A10-3) production devices (11,12-1,13,30;11,12- 2 , 13 , 30 ; 14 , 15 ; 16 , 17 , 30 ; 11 , 12 - 3,13,13,30;18,18';27,28,28',31;19,19',19"; and 18,18';- 11',12'-3,13,30;11',12'-2,13,30;14,15;16,17,30; 11',12'- 1,13,30;19,19',19") are arranged in succession in the conveying direction, and in that, furthermore, the thermal compacting device (40) with following calender and/or embossing rollers (50,50'), which consist of a heating cylinder (41) with a pressure band (A3) engaging on it, is arranged in the conveying direction. 2. Apparatus according to Claim 1, characterized in that the production devices are arranged in twos respec¬ tively along the linear outward path (11,12-,13,30;11,12 2,13,30;14,15;16,17,30;11,12-3,13,30;18,18') and return path (27,28,28',31;19,19',19") and in that in the op¬ posite direction to the rotary-band travel there is a perforated driving band (A2) which can be pressed against this. 3. Apparatus according to Claim 1, characterized in that the production devices (18,18';11',12'-3,13,30; ll',12'-2,13,30; 14,15; 16,17,30; 11', 12'-1, 13, 30; -/£>- 19,19',19") are arranged along a linear path of the individual rotary bands (A10-3,A10-2,A10-1), and in that in the opposite direction to the individual rotary bands (A10-3,A10-2,A10-1) there is a perforated driving band (A20) which can be pressed against this. 4. Apparatus according to Claim 2, characterized in that the rotary band (Al) has toothings (zl,z2) at its edges on both sides of the rotary band (Al) , the rotary band (Al) being in engagement via the toothing (zl) with a toothing (z) of a driving roller (23) or a toothed roller (24), and the toothing (z2) of the rotary band (Al) being in engagement on the one hand with toothings (z4) of the metering rollers (12-1,12-2,12-3) and on the other hand with a toothing (z3) of the driving band (A2) . 5. Apparatus according to Claim 3, characterized in that an individual rotary band (A10-l,A10-2,A10-3) is provided for each absorbent-pad part layer (C-1,C-2,C-3), all the individual rotary bands (A10-l,A10-2,A10-3) have toothings (25) at their edges on both sides, and these are in engagement with the toothings (z4') of deflecting rollers (56), the individual rotary band (A10-3). which is the first in the conveying direction being in engagement with a driving roller (57) of the driving band (A20) via a take-up roller (53), and the second and third individual rotary bands (A10-2 and AlO-1) being respec¬ tively connected to transmission rollers (54,54',54") from the deflecting rollers (56') by means of transmis¬ sion bands (A4 and A4') . 6. Apparatus according to Claim 1, characterized in that air-permeable shaping insets (22,52) are provided for each insertion mould (20,20') of the rotary band (Al) or of the individual rotary bands (A10-l,A10-2,A10-3) . 7. Apparatus according to Claim 6, characterized in that the insets (22) of the rotary band (Al) rest on an air-permeable textile web (D), preferably a netted sheet¬ like structure. 8. Apparatus according to Claim 4, characterized in that a plurality of, preferably three, metering rollers (12-1,12-2,12-3) for the flock material, which interact with corresponding insertion moulds (20-1,20-2,20-3) of the rotary band (Al) and vacuum chambers (30) are ar¬ ranged in the conveying direction of the rotary band (Al). 9. Apparatus according to Claim 5, characterized in that a plurality of, preferably three, pairs of metering bands (12'-3,12'-2,12'-1), which interact with correspon¬ ding insertion moulds (20'-3, 20'-2,20'-l) of the in¬ dividual rotary bands (A10-3,A10-2,A10-1) and vacuum chambers (30), are arranged in the conveying direction of the individual rotary bands (A10-3,A10-2,A10-1). 10. Apparatus according to Claim 8, characterized in that, in the rotary band (Al), the insertion moulds (20) are arranged at distances in succession in the conveying direction and air-impermeable spacer pieces (21) are arranged between the insertion moulds (20). 11. Apparatus according to Claim 8 or 9, charac¬ terized in that, in the rotary band (Al) or in the individual rotary bands (A10-l,A10-2,A10-3) , the insertion moulds (20 or 20') are arranged next to and at distances from one another. 12. Apparatus according to Claim 1, characterized in that the rotary band (Al) or the individual rotary bands (A10-l,A10-2,A10-3) are designed as toothed belts. 13. Apparatus according to Claim 8 or 9, charac¬ terized in that a metering unit (14,15) with a spreading device (15) for a superabsorber powder is arranged between two flock-material metering devices (11,12,13; 11',12',13) in the conveying direction, preferably between the second (12-2;12'-2) and third (12-3;12'-1) metering device. 14. Apparatus according to Claim 8 or 9, charac¬ terized in that an unwinding device (16) with a laying- on device (17) for a severable superabsorber web is arranged between two flock-material metering devices (11,12,13;11',12',13) in the conveying direction, preferably between the second (12-2;12'-2) and third (12 3;12'-1) metering device. 15. Apparatus according to Claim 1, characterized in that a blow-out device (27) is arranged in the lower plane of the shaping section (10) within a perforated toothed roller (24) and is arranged in operative connection with the vacuum chamber (21) located under¬ neath the driving band (A2) and with a suction device (28) facing the toothed roller (24) on the outside. 16. Apparatus according to Claim 1, characterized in that arranged in the conveying direction in the upper plane of the shaping section (10), after the last metering roller (12-3), is an unwinding device (18) which is equipped with a brake (18') and which is intended for a first covering web (B) introducible via a tensioning roller (25) between the rotary band (Al) and the driving band (A2). 17. Apparatus according to Claim 1, characterized in that arranged in the conveying direction in front of the first pair of metering bands (12'-3) is an unwinding device (18) which is equipped with a brake (18') and which is intended for a first covering web (B) introducible via a deflecting roller (56') in the region of the driving roller (57) between the first individual rotary band (A10-3) and the driving band (A20). 18. Apparatus according to Claim 1, characterized in that a second unwinding device (19) which is equipped with a brake (19') and which is intended for a second covering web (B') introducible via a deflecting roller (19") between the shaped uncompacted absorbent pads (C) and the heating cylinder (41) is arranged above the deflecting roller (26 or 57') of the driving band (A2) or of the driving band (A20). 19. Apparatus according to Claim 1, characterized in that a covering web (B or B') or covering webs (B,B') on both sides are provided between the pressure band (A3) and the heating cylinder (41) of the compacting device (40). 20. Apparatus according to Claim 1, characterized in that, for conveying the individual absorbent pads (C',C), an auxiliary transport device (29) is arranged between the driving band (A2) or the driving band (A20) and the pressure band (A3) and above these. 21. Apparatus according to Claim 1, characterized in that the pressure band (A3) has, at least on its face confronting the heating cylinder (41), a heating device (48) activatable for a predetermined pressure-band area. 22. Apparatus according to Claim 1, characterized in that the driving band (A2) or the driving band (A20) of the shaping section (10,10') and the pressure band (A3) of the compacting device (40) are produced in one piece.

Inventors: ROSSI GUIDO, ROSSI, GUIDO
Applicants: PRO GE SAN SRL, PRO.GE.SAN. SRL
Application year: 1990
Main classification: A61F13
IPC codes: A61F13