EP0895455B1 - Process for producing bristle material for bristle goods - Google Patents

Description

The invention relates to a method for producing Bristle material for bristle products with various types Plastic bristles that are extruded as continuous monofilaments be generated.

In the present context, bristle goods are understood all products where more than one type of Bristles for brushes, brooms, scrubbers, brushes, brush tapes, Mats with bristle trim etc. can be processed. Bristle material is any composition of Bristles of finite length understood that either immediately or after further cutting to the bristle goods is processed.

Most of the bristle goods are bristle trimmings forming bristles uniform among themselves, so exist made of the same material and have the same geometric Dimensions on. Occasionally there are differences in the length. But there are also bristle products known which the bristle trim from individual bristle bundles or also bristle packs with different types of bristles in the Bundle or package exists (see FR-A-1134245). The diversity lies especially in the bristle diameter or in the bristle material. First and foremost, optical effects, but also the different properties of the bristles be used in order to use different types of bristle goods Produce effects. Are best known Mixtures of natural bristles and plastic bristles, whereby through the mixture primarily the expensive natural fibers to be partially replaced without sacrificing the beneficial To have to do without the properties of natural bosters. Mixtures of this type are known in particular with brushes and brooms.

Plastic bristles are made from endlessly extruded monofilaments prepared (cf. generic EP-A-0 086 412). The monofilaments are made after extrusion spooled. Before winding or as part of another As a rule, the monofilaments are stretched, to give them the desired bending behavior to lend. The molecular longitudinal orientation achieved during stretching is optionally replaced by thermal Stabilize fixed. The monofilaments then become strands merged and from the strands so-called bundles cut to length, the length of which is a multiple of the length of the later bristles. These are enclosed in an envelope Bundles then become so-called short cuts trimmed approximately the length of the bristles correspond. The ones still enclosed by the shell Short cuts then go to brush production, where the Shell separated and the bristles usually on Magazine to be handed over. From the magazine through Compartments peeled off individual bundles, which are then attached to the carrier attached by mechanical or thermal processes become.

To use a bristle trim in this procedure Bundles or packages with different types of bristles received, the bundles or short cuts with different types Bristles side by side after loosening the sheath laid out horizontally and by repositioning several times mixed in the transverse direction, then again merged and bundled. Here is the composition and / or homogeneity of the mixture largely that Left to chance and usually completely inadequate. Furthermore, undesirably large waste arises when mixing Bristle material. This mixing is also because of the high machine and time expenditure very expensive. The mixing Rough and odd synthetic bristles is due to the necessary to align the bristles in the transverse position Combing, if at all, only with intolerable waste possible. Mixing smooth synthetic bristles is problematic because of their good sliding properties. The on Bristle goods manufactured in this way can be found in the Quality, i.e. especially in the orientation of the different Bristles in the bundle or in the entire bristle trim not convince.

In another process technology, the endless monofilaments processed directly from the coil by the Monofilament strand in which the monofilament in one the corresponding number of later bundles or trimmings, deducted directly to the place of manufacture. The leading end of the strand is positioned there, optionally also thermally on the bristle carrier attached and then one of the desired bristle length cut the appropriate length from the endless strand. With this mode of operation, the aforementioned mixing can be done not perform at all.

The invention has for its object a method to create using the manufacture of bristle goods allows different types of plastic bristles, namely regardless of which of the above two procedures applied in the manufacture of the bristle goods and the plastic bristle mixture at the same time cheaper and a mixture of defined composition to ensure.

This object is achieved in that different types of endless monofilaments in the for the finished Bristle goods desired composition in the direction their longitudinal extension merged into a mixed strand are and the mixed strand is wound up, and that of the mixed strand for the manufacture of Bristle material required bristle material is cut to length.

The desired bristle mixture is thus brought together generated by endless monofilaments. This may be the case the manufacture of the continuous monofilament during winding extrusion, but also later from the production spools happen down. This makes it special possible, in the mixed strand generated from different types Endless monofilaments to a defined composition get that until the bristles are cut to length Final dimension or any intermediate dimension is retained. By eliminating the manual or mechanical mixing process there is also a saving in investment Facilities and space requirements. Furthermore, it cannot unwanted waste of bristle material. In order to can be the highest with simultaneous cost reduction Meet the quality requirements for the finished bristle goods. The invention also does not open up to now given possibility, differently structured and / or to produce profiled bristles in a mixture, by appropriately structured or profiled Endless monofilament, possibly with smooth monofilament the mixed strand are brought together. With the so far usual mechanical or manual mixing can be from such structured or profiled bristles do not produce defined mixtures, as such bristles tend to segregate or not at all let mix.

The endless monofilaments can either be single and immediate are brought together to form the mixed strand. Instead it is also possible that two or more strands with each different, but within the strand same endless monofilaments to a single mixed strand be spooled together. This is made possible in particular the bristle goods manufacturer, the wound bristle material to keep in stock and the required mixture if necessary to manufacture.

An advantageous variant of the method stands out characterized in that the mixed strand one or more times is rewound. In this way, homogeneous Make fine mixtures.

The principle of the invention can be different Realize executions. So it can be provided that the various endless monofilaments in one individual bristle bundle or a bristle pack of Bristleware corresponding composition to one Mixed strand are merged and the mixed strand is wound up, and then before the mixed strand the bundles or packages in the desired length of the Bristles or a multiple thereof can be cut to length.

In this version, mixed strands are generated, in which the monofilaments in number and quality already have the shape as it will be on the bristle carrier later bristle bundle or bristle pack to be fastened are desired.

This version will be chosen especially if it is a bundle of larger diameter, either that the bundle has a correspondingly large number of bristles or has such larger diameter. Also for them Manufacture of bristle packs of larger cross-section this method is suitable.

This procedure is also suitable for the so-called Endless processing, in which the unwound strand with its leading end first connected to a carrier will and during or after fastening the Bristles are cut to length from the strand. The attachment usually takes place by thermal processes, namely welding, injection, beating or the like.

Instead, the method can be done in the same way be carried out that the different types of monofilaments are brought together in a mixed strand and spooled out, in which the monofilaments evenly mixed in one Number that are a multiple of the number of Bristles in a single bundle of bristles, and that of the mixed strand after unwinding bundles with a multiple the length of the bristles are cut to length that the Bund is wrapped with a sheath and then the covered waistband into short cuts in one of the bristles appropriate length is cut from which individual Bundles of different types of bristles by dividing be preserved.

Even in this way of working via the intermediate stage of Short cuts eliminate all the disadvantages of the known Mixed media. The attachment of the bundle can be mechanical Manner, e.g. the well-known punching, by gluing but also with any thermal process.

With the method according to the invention, continuous monofilaments can be produced of different diameters and / or materials and / or profile and / or different surface structure and / or color to a mixed strand, if necessary with the intermediate winding of thinner strands.

Figur 1

eine Ansicht einer Anlage zur Herstellung des Borstenmaterials und der fertigen Borstenware im "in-line"-Verfahren;

Figur 2

eine Variante des Verfahrens gemäß Figur 1 mit diskontinuierlicher Arbeitsweise;

Figur 3

mehrere Ausführungen einer Anlage zur Herstellung eines Mischstrangs;

Figur 4

weitere Ausführungen zur Herstellung eines Mischstrangs und

Figur 5

eine letzte Variante mit Koextrusion verschiedenartiger Monofile.

The method is explained below using the schematic drawings of different variants. The drawing shows:

Figure 1

a view of a plant for the production of bristle material and the finished bristle goods in the "in-line"process;

Figure 2

a variant of the method of Figure 1 with discontinuous operation;

Figure 3

several versions of a plant for producing a mixed strand;

Figure 4

further versions for the production of a mixed strand and

Figure 5

a last variant with coextrusion of different types of monofilaments.

With 1, 2 and 3 extruders are indicated, each with Multiple nozzles are equipped. For example, work extruders 1 and 3 with triple nozzles, extruder 2 with quadruple nozzle, this number is only an example for any other, especially higher number of nozzles stands. The endless monofilaments 4 generated by the extruder 1 - if necessary after a stretch and a thermal stabilization - wound on a spool 5. Similarly, the extruder 2 is a coil 7 and the extruder 3 is followed by a coil 9, which the the extruder 2 leaving monofilament 6 or from Extruder 3 record monofilaments 8 generated.

The monofilaments 4, 6 and 8 can, for example, in the Diameter or material, in color or in their surface structure or their transverse or longitudinal profile differentiate. They are each in front of the coils a strand 10, 11 or 12 merged and there will be these strands then wound up.

From strands 10, 11 and 12, each with different types Monofilament is made by merging these strands and rewinding onto the coil 13 a single mixing strand 14 generated in which the different types of monofilaments defined mixed.

From the coil 13, the mixed strand 14 with different types Monofilament subtracted and -from its leading Outgoing - wrapped with a sleeve 15. In defined Lengths are wrapped by the mixed strand 14 so-called bundles 16 cut to length, from which by further Cutting several short cuts 17 can be obtained. This Short cuts either become bristle goods immediately processed or to the manufacturer of the bristle goods delivered. The short cuts 17 are at the manufacturing site the bristle goods are freed from the casing and, if necessary magazine. The short cuts that have been stored in magazines then separate bundles 18 and on the bristle carrier 19 attached.

Instead of the procedure described above, the Strand 14 also before winding the sleeve 15 to length be cut off from a covenant. This strand section can be combed out if necessary and then the monofilaments are again combined into a bundle 16 and envelops. This is followed by the production of the Short cuts in the manner described.

Another execution of the procedure is in the right part shown in the drawing. With this version for example, from the extruder 3 monofilaments 8 different Cross-section and / or cross-sectional shapes and / or generated different color and these are on the Coil 9 merged directly into a mixed strand. This mixed strand with different types of monofilaments in defined mixture is either directly from the coil 9 or withdrawn after a rewinding process and immediately handed over to the brush production. There is the strand attached to the bristle carrier with its leading end, e.g. in a thermal process. In conjunction or after attaching the strand, as indicated at 20, cut to length on request. In this procedure preferably several coils with similar strands a coil set and by pulling the Strands all bundles 21 on the bristle carrier 19 attached at the same time. In this case, the multiple Spools of mixed strands with various types of monofilament Contain composition so that on the bristle carrier 19 bundles with bristles of various compositions in a predefined geometric distribution can be attached.

Instead of the in-line method shown in Figure 1 can also worked in the usual way become, i.e. endless monofilaments 4, 6 and 8 will be added the winding on the spools 5, 7 and 9 and wound on other location, e.g. at the manufacturer of the bristle goods a coil 13 coiled together to the mixing strand produce. Instead of extruding the different ones Endless monofilaments 4, 6 and 8 from three different extruders a single extruder 22 can also be provided for this be the various endless monofilaments generated one after the other.

In Figure 3, three extruders 24, 25 and 26 are shown, the for coextrusion of various types of endless monofilaments 27 to 32 serve, for example in their diameter, differ in color or the like and after winding on the coils 33, 34 and 35, on which one already Premixing takes place, merged into a mixed strand become. This is another variant in FIG indicated where the various monofilaments immediately wound onto a bobbin 36 to form a mixed strand become.

Finally, FIG. 4a shows an embodiment in which Endless monofilaments of different cross-sections are created become. The extruder thus produces 37 monofilaments 40 with a triangular one Cross section wound on a spool 41 be while the extruder 38 monofilaments 42 of circular Cross-section generated, which wound on a coil 43 become. The mixed strand can then be of the coils 41, 43 generated by rewinding. Figure 4b shows one Variant in which the extruder 39 continuous monofilaments of different Cross-sectional shape with a corresponding Nozzle shape created. These different types of endless monofilaments 44, 45 are brought together directly on a coil 46, the mixed strand being formed on this coil becomes. However, the mixed strand can also be rewound can be obtained on another coil.

Claims (7)

1. Method for the production of bristle material for brushware with different types of plastic bristles produced by extrusion in the form of continuous monofilaments, characterized in that different types of continuous monofilaments are combined in the composition desired for the finished brushware and in the direction of their longitudinal extension to form a mixed strand which is wound up and that from the mixed strand the bristle material required for the production of the brushware is cut to length.
2. Method according to claim 1, characterized in that two or more strands with in each case different types of continuous monofilaments, but which are the same within the strand, are wound together to form a single mixed strand.
3. Method according to claim 1 or 2, characterized in that the mixed strand is rewound one or more times.
4. Method according to one of the claims 1 to 3, characterized in that the different types of continuous monofilaments in a composition corresponding to an individual bristle bundle or a bristle group of the brushware are combined to form a mixed strand which is wound up and that subsequently upstream of the mixed strand the bundles or groups are cut to length in the desired length of the bristles or a multiple thereof.
5. Method according to one of the claims 1 to 3, characterized in that the different types of monofilaments are combined to form a mixed strand and wound up and in which the monofilaments are present in uniformly mixed manner in a number which is a multiple of the number of bristles in a single bristle bundle and that from the mixed strand, following unwinding, skeins are cut to length with a multiple of the length of the bristles, that the skein is surrounded with a cover and subsequently the covered skein is cut to short-cuts in a length corresponding to the bristles and from which individual bundles of different types of bristles are obtained by separating.
6. Method according to one of the claims 1 to 5, characterized in that continuous monofilaments having a different diameter and/or material and/or profile and/or different surface structure and/or colour are combined to form the mixed strand.
7. Method according to claim 5, characterized in that the different types of continuous monofilaments are combined to form the mixed strand immediately following extrusion.

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