DE7334973U - DEVICE FOR THE PRODUCTION OF A LAYERED, AT LEAST TWO NEEDLED LAYERS OF NON-WOVEN FIBER VIBRANT MATERIAL - Google Patents

Description

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DIPL.-ING. HORST RUSE DIPL.-ING. PETER KOSEL PATENT LAWYERS

D 3353 Bad Ganderehelm November 21, 1977

Hohenhefen 5

Telephone (D5382) 2842

TelegramnvAdreaie: Siedpaten «Ginderehelm

Northern Blankets limited

C 73 34 973.2 2772/1

Northern Blankets Limited

Vine Mill, Royton, Oldham, Lancashire 012 5 LN

UK ACNIA

- ^ device for the production of finely layered, comprising at least two layers of nonwoven fiber fleece material needled together

The invention "relates to an apparatus for manufacturing • in a layered layer comprising at least two layers of nonwoven fiber fleece material needled to one another Web, with a needle bar on which a number of parallel to each other, protruding from the needle bar Needles is attached, a drive device for the needle bar, which this reciprocating movement in the longitudinal direction of the needles, at least one pair of conveyor rollers for conveying the layers one above the other to the needle bar towards and away from this, a support plate and a guide frame located at a distance from this, which the Layers to guide them in the area of the needle bar between

Bank account: BraunsdiwsIgtectoSlaaMifnkjfUItl & Bad Ganderehelm, Könto no. 22.118.S70 Poetacheddconto: Hannover 66715

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take, the guide frame and the support plate together in a frame in the direction of the movement of the NscLelfcsire slidable gBfv'hvt ° ίτ \ <) -, »nc! τ ?? it a *? "* drive which lowers the support plate and the guide frame together from a working position to a rest position in the direction of the movement of the needles and away from them.

In a device of this type, a coated web is continuously produced with parts which are needled together over an area which is located by a non-needled area at a distance from at least one end of a piece of web in the conveying direction. A special condition for such a section of a layered web arises in the production of electrically heatable blankets, which advantageously have a cover made of a layered web (laminated fabric), in which two non-woven layers of nonwoven material are spaced apart and parallel to each other to be ammunition needles, whereby the strips stop shortly before the ends of the casing. Electrical resistance heating conductors can then be introduced into the channels between the needled strips and thus form the electrically heated blanket. Such web casings can be manufactured inexpensively from a continuously produced layered web with non-layered areas which are located at a distance from one another in the conveying direction, in that the web is transversely severed in these non-layered areas.

An apparatus with which such web casings can be produced has been described in US Pat. No. 3,431,611. This device has a needle bar to which needles protruding therefrom are attached and which are driven by a drive device up and down, i.e. in the longitudinal direction of the

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Needles "is moved. It" also has a pair of conveyor rollers for conveying the layers one above the other to and from the needle bar, as well as a support plate and at a distance from this a guide frame, which both take the layers in the area of the needle bar between them. They are both in a frame towards the excitement the needle bar slidably guided. However, this device is designed so that constrictions between the individual needled ancestors cannot be formed.

The object of the invention is to design the device so that constrictions between the needled Tracks or strips can be generated.

This object is achieved according to the invention in that on the needle bar at least one additional needle head with additional ones extending therefrom parallel to one another Needles mounted movably relative to the needle bar between a working position and a rest position is, the additional needles needling the fiber fleece layers together in the working position and in the rest position Remain at a distance from the nonwoven layers during the back and forth movement of the needle bar.

By means of a positioning device, which is provided according to the invention, this becomes at least one additional The needle head is moved back and forth between its rest and working position and a control unit can drive it for the needle bar, the drive device only movement of the plaster plate and the guide frame and the positioning device be coordinated.

A further embodiment of the invention is that the needles on at least one additional needle head

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Course of the needle areas in the conveying direction in the spacing area protrude between two needle areas.

In another embodiment, the needles can be attached to at least one additional needle head in the course of the needle areas be arranged transversely to the conveying direction in the conveying direction at a distance from the needle areas, which is composed from a certain multiple of the distance der- center line of two needle areas plus part of the distance, in particular half the distance.

In this way, with simple means and correctly coordinated, one of two needled together Layers made of non-woven fiber fleece having web, in which the individual needled areas Have constrictions, which when this nonwoven web is used in the manufacture of electric blankets, can serve to accommodate thermostats and the like. The position of the thermostats is determined by the constriction certainly.

Another embodiment of the invention can be that the guide frame is perforated and the support plate is provided with holes for the needles, the guide frame and the support plate one above the other and in an adjustable manner Are spaced apart, and wherein the needles at one end of their stroke in the holes of the needle bar Immerse yourself further than the support plate away from the guide frame and at the other end of its stroke in the normal position of the guide frame and the support plate outside of that lying between the support plate and the guide frame Area.

In a further special embodiment, the device also has a transverse separator running transversely to the conveying direction.

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device for severing the layers needled together.

The invention is used in particular "in manufacture electrically heated blankets, but the products are also used to manufacture, for example Heating pads and heating inserts suitable for underfloor heating. The invention is very suitable for that Mass production of such casings because a layered web can be continuously produced by that strips parallel to each other are needled, separated by non-layered transverse zones through which the web can be severed transversely to remove the individual casings from the endless web to win. Ef then become electrical resistance heating conductors threaded between ^ s strips, and the Ends and / or sides of the cover are glued or braided. One or more intermediate layers e.g. from a light, coarse cotton or teineageweäe or cellular or foamed rubber or plastic can be used between the nonwoven layers through the needling be determined. The needled strips are advantageously alternately offset from one another. This can be done according to of the invention relatively easy by suitable notification of the needles on the needle bar.

To get thermostats right inside the shell of the electric To arrange a heated blanket on the resistance heating conductor is a narrowing of the channel between adjacent needled Strips required. According to the invention, this constriction is produced by means of an additional needle head, which is mounted on the needle bar and relative to the needle bar at predetermined times between a

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Rest position and a working position is movable in which the needles of the additional needle heads together with the needles of the needle bar together needling the layers passing through the needle device.

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Several exemplary embodiments of the invention are shown in the drawings.

Pig. 1 is a partially broken away partial view of an electrically heatable blanket "which is manufactured in accordance with the invention,

2 shows a schematic side view of a bathing device according to the invention,

Pig. 3 is a schematic end view of the door direction according to Fig, 2 and

Figure 4 is a bottom plan view of one in the gate direction according to FIG Fig. 2 and 3 contained needle bars

In Fig. 1, an electrically heated blanket is shown. This blanket has a cover made of a pair of superimposed rectangles made of non-woven fibrous fabric. 1 and 2, which by means of a number of needled strips 4 are needled together, running parallel to the sides of the blanket and spaced from the sides and ends of the Extend ceiling. The needled strips 4 are equally spaced from one another and are of the same length, with successive needled strips facing one another in the longitudinal direction are offset. A heating device of the blanket has a resistance heating conductor 5 which extends in the form of a serpentine line between adjacent needled strips 4 and held in place by these needled strips. The heating conductor 5 is around ends 6 of the needled strips 4 laid around, which spring back opposite outwardly projecting ends 8 of adjacent needled strips 4 · At the blanket shown in Fig. 1 is a double blanket with double control. The heater has heating conductor parts 9 running transversely to the sides at one end of the ceiling and leading to a plug 10.

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According to one embodiment of the invention, the ceiling cover described can be used as a layered web (laminated fabric) can be produced in that two layers 21 and 22 of nonwoven fabric become one in FIGS. 2, 3 and 4 Sehematiech indicated spring device are guided. The needle device shown has a needle bar 30 which carries a number of needles 31 parallel to one another, which protrude from the underside of the needle bar · The needle bar 30 is in a frame 32 of the needle device arranged so that it can move back and forth in the direction in which the needles 31 extend The needle bar 30 is moved back and forth by a drive 34 shown schematically.

Below the needle bar 30 there is a support plate 35 with a number of holes that connect with the needles 31 cursing. A guide frame 36 arranged above is connected to the support plate 35. They become layers 21 and 22

The unit consisting of the support plate 35 and the guide frame 36 is arranged in the frame 32 so that it extends in the same direction as the guide frame and moving forward movement of the needles 31 can move

In its normal position, the support plate 35 is arranged with respect to the stroke of the needles 31 so that the free ends of the needles 31 enter the shear of the support plate 35 at one end of the stroke and join at the other The end of the stroke are at a distance from and above the support plate 35,

The layers 21 and 22 are intermittently synchronized with the needle movement between the support plate 35 and the Guide frame 36 conveyed by supply rollers 23 and 24 by means of deflection rollers 25 and drive rollers 26

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The claws 31 are arranged on the underside of the needle bar 30 as the areas 33 in FIG. 4 show. Tuck regions 33 correspond to the pattern of the ends of needled en strips 4 in the ceiling gemäö Fig. I, therefore, regions 33 have a number of parallel strips tone of equal width, which at the same distance from each other on the needle bar 30 transverse to the feed direction of the Layers 21 and 22 are distributed. The ends of adjacent strip-shaped areas 33 are offset from one another,

Normally, the cover cover according to Fig. 1 is produced by the needle device according to Figs. 2 and 3, while the layers 21 and 22 are moved between the support plate 35 and the guide frame 36 in order to pass through the Needles 31 to be needled together, the needle operation is temporarily interrupted, so that the needled strips 4 result from the desired length. In practice however, the needle bar 30 will move at such a speed moved to and fro so that it is not OK, the needle bar 30 easy to move and stop this way. According to the invention, means are therefore provided for the layers 21 and 22 out of reach of the reciprocating needles during predetermined time intervals. This is done in that the superimposed fiber fleece layers 21 and 22 between the support plate 35 and the Guide frame 36 are moved down below the stroke of the needles on the needle bar 30, so that these needles So you can continue to move back and forth continuously. For this purpose, the unit is made up of the support plate 35 and the guide frame 36, which, as previously mentioned, in the Rahn ^ 32 towards the back and forth movement of the needles 31 is movably arranged by a drive 38 from a normal or Working position lowered into a lowered or rest position, in which the layers 21 and 22 are outside the Range of the needles 31 are located. The drive 38 for

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This temporary lowering of the unit consisting of the support plate 35 and the guide frame 36 preferably has a pneumatic or hydraulic cylinder that acts directly on the unit.The unit can, however, also be moved by other suitable means or by a mechanical lever mechanism.

Since there is a risk that the layers 21 and 22 are taken up by the needles 31, the lies Guide frame 36 on the top surface of top layer 21 to ensure that layers 21 and 22 are aligned If necessary, move the support plate 35 downwards and out of the reach of the needles 31 · The Guide frame 36 can have a hole pattern similar to the support plate 35; however, it can also be larger and more Open openings that allow the needles 31 to penetrate to the support plate 35, but the layers and 22 still take enough down with you, if the support plate 35 is lowered in the aforementioned manner.

The needle device thus provides a continuous web of layered nonwoven with in the longitudinal direction spaced patterns of longitudinally extending needled strips, each pattern is of the type shown in FIG. A transverse cutting device 39 is located behind the needle device in the conveying direction and is operated at predetermined time intervals to cut the needled web transversely and cut them to be divided into sleeves for electrically heated blankets. Each of these sheaths is then subsequently fitted with a heating conductor 5 provided, which is threaded between adjacent needled strips 4 and which are related with Fig. 1 described heating device forms.

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It can also be seen from FIG. 1 that in some of the Channels between adjacent needled strips 4 a number of thermostats 11 Ια distance from each other along the heating conductor 5 are arranged · While the heat conductor 5 carrying the thermostat 11 is threaded through the channel in which it should stay later, the foremost thermostat 11 comes into contact with a constriction 12, which is caused by a transverse extension one of those needled strips 4 is defined which determine the end position of the thermostat 11.

To apply these constrictions 12 as part of the needle operation, according to a further feature of the invention the needle bar 30 one or more additional needle heads 40. The needle heads can by a positioning device 41 relative to the needle bar 30 in the sighting of the reciprocating movement of the needle bar 30 are moved so that they are either in a working position in which the additional needles are in the plane of the needles 31 of the Needle bar 30 are located and move together with these to participate in the needle operation, or that they go up be moved into a rest position shown in Fig. 2, in which they are located above the needles 31 of the needle bar 30 are at a level that they do not come into contact with layers 21 and 22. The additional needle heads 40 can advantageously, based on the conveying direction, either in front of or behind the needle bar 30 and are controlled so that they take effect at predetermined times and then produce the constrictions 12 according to FIG.

The timing of the functions of the various elements of the needle device becomes electrical coordinated by a control unit 50 which is connected to the drives 34 and 38 and the positioning device 41 is. The control unit 50 preferably has a Card reader for reading programmed information

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from punch cards to «Thus, the Torrichtung those run i operations that are necessary to produce a" distinct pattern or specimens of a cover for an electrically heated blanket or other product "Instead, the coordinating Irformation stored in any other appropriate manner, read and processed by the control unit 50 and passed on to the drives 34 and 38 and the positioning device 41 in the desired sequence »

! times another embodiment of the invention, the shell of the electrically heated blanket according to FIG. 1 is produced in a device which corresponds in all essential details to those according to FIGS. 2, 3 and 4, with the exception that the support plate 35 in its Normal position is fixed. This means that the drive 38 is superfluous and omitted. The layers 21 and 22 are then needled together by means of needled strips which extend continuously over the entire length of the layered nonwoven web produced thereby.

In this case they are done by cutting with the cross cutting device 39 cut-to-length sections of layered fleece produced by the web are not immediately available for use suitable for the production of electrically heated blankets. Rather, it is an additional process step necessary before each cut-to-length section can become a cover for an electrically heated blanket. According to the invention This additional step is that the layers 21 and 22 in the region of the ends of the needled Strips are separated from each other again. This separation is preferably done so that the remaining needled Strips of the same length but are offset from one another in the longitudinal direction. This results in a shell that can be used in corresponds to all of the essential features of the shell according to FIG.

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The separating step can be carried out by hand by tearing open the transversely separated edges of the layered fleece or through Separate the ends of the needled strips with a suitable knife blade or several knife blades.

The needle device according to this embodiment of the invention “does not need to have the guide frame 36. The areas 33 ″ do not need to be positioned against one another on the needle bar 30 to be displaced. The device can therefore be modified according to the invention and in accordance with the invention in order to achieve the

To arrange needles 31 on the needle bar 30 in strips and to provide the needle head or heads 40 around the constrictions 12 in the channels between the needled strips 4 to be attached.

After the electrical heating device has been installed completely inside the ceiling cover, the ends and / or the sides of the cover are secured, for example by means of an adhesive strip or by braiding, as the last processing step. The size, shape and wiring of the ceiling can be varied as needed \ be compared to the previously described embodiments for the manufacture of false ceilings or covering in a single or double size.

The two fiber fleece layers 21 and 22 can be made with any suitable fiber or fiber mixture j and can be the same or different. For example

\ The fibers can be made of rayon, wollet akrilan, polyamide and / or

\ Polyester are made. One or more intermediate layers

■ can be provided between layers 21 and 22,

to bring the bulk and / or dimensional stability. Solchjrf an intermediate layer 27 may be from a supply roll EU of the needle assembly between the layers 21 and 22 overall \ be derived, as shown in Fig. 2. In this

\ Way can also be natural or synthetic rubber or

Plastics represent the main bulk, and a light one

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coarse cotton or linen fabric (scria) can stabilize the size of the product. A shallow cotton or However, linen fabric should preferably not be used because the heating conductor 5 is in the threads of this fabric could get caught during honing. To prevent this, a layer of foamed or cellular material can be used will. Alternatively, this cotton or linen fabric can be replaced by a more densely woven cloth, e.g. a thin cotton cloth (cheesecloth).

Because the layered product is only needled from one side, it is advantageous to use nonwoven webs 21 and 22 which are not originally the same, for example in terms of the thickness and / or the intensity of the initial needling before the layering step described above. The sheath produced can be subjected to a lifting operation on one or both sides prior to the introduction of the heating conductor 5 in order to reduce the patterning effect of the needling to only ¹ the predetermined areas.

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Claims (1)

j DIPL.-ING. HORST RUSE DIPL.-ING. PETER KOSEL PATENT LAWYERS D 3353 Bad Gandersheim Nov. 21, 1977 HohenhBfan5 Telephone CD 53 825 28 « Tetegram address: Stedpatant Ganderehelin G 73 34 973.2 2772/1 Northern Blankets limited S chut zan S ^- Preference Device for the production of a layered, comprising at least two layers of non-blown fiber fleece material needled to one another Track, with a needle bar, on which a number of parallel bars, of the needle bar protruding needles is attached, a drive device for the needle bar, which this one Longitudinal reciprocation of the needles is given to at least a pair of conveyor rollers for conveyance of the layers on top of one another towards and away from the needle bar, a support plate and a guide frame at a distance from this, which the layers for their leadership in -2- Bank account: BraunechwelglechfHßüM ^ bMkjaitatoJBadGenderahelm. Account number 22.118.970. Port checking account ι ΗβηηονβΓββ71Β ichfHßUf Miajk jailaleJBad Ganderahalm, Koni 733 ^ 973 23.oa78 -2- Take the area of the needle bar between you, the guide frame and the support plate together are guided displaceably in a frame in the direction of the movement of the needle bar, and with a drive, the support plate and the guide frame together from a working position to a rest position lowers in the direction of movement of the needles and away from them, characterized in that that on the needle bar (30) at least one additional Needle head (40) with additional needles extending therefrom parallel to one another relative is mounted movably to the Nadeloarre between a working position and a rest position, wherein the additional needles in the working position needle the fiber fleece layers (e.g., 21,22) together and in the rest position during the to-and-fro movement of the needle bar at a distance from the nonwoven layers remain,, Device according to claim 1, characterized in that that in each case a number of needles (31) are combined to form strip-like needle areas (33) which run parallel at a distance from one another. Device according to claim 1 or 2, characterized by a positioning device (41) which the at least one additional needle head (40) between its rest and working position and moved, and by a control unit (50), by means of which the drive (34) for the needle bar (30), the drive device (38) for moving the support plate (35) and the guide frame (* 6) and the positioning device (41) is coordinated. -3- 7334973 03/23/78 -3- 4. Device according to one of claims 1 to 3, characterized characterized in that the needles on at least one additional needle head (40) in the course of the needle areas (33) protrude in the conveying direction into the spacing area between two needle areas, 5. Device according to one of claims 1 to 4, characterized in that the needles on at least one additional needle head (40) in the course of the needle areas (33) are arranged transversely to the conveying direction in the conveying direction at a distance from the needle areas, which is composed of a certain multiple of the distance between the center line of two needle areas plus part of the distance »in particular half the distance * 6. Device according to one of the preceding claims, characterized in that the guide frame (36) is perforated and the support plate (35) m ± t holes for the needles (31) is provided, wherein the guide frame and the support plate are arranged one above the other and at an adjustable distance from one another, and with the needles at one end of their stroke in the holes in the support plate (35) further away from the needle bar (30) than the guide frame (36) immerse yourself and at the other end of its stroke in the normal position of the guide frame (36) and support plate (35) outside of the area lying between the support plate and the guide frame are located. 7. Device according to one of the preceding claims, characterized by a transverse to the conveying direction -A- 7334973 23.0178 -4- running transverse severing device (39) for severing of the layers needled together.