DE4125778C2 - Method and device for fixing the thread loops in tufted carpets - Google Patents

Description

The invention relates to a method for fixing the Thread loops in the manufacture of Tufted carpets, which after pulling in pile loops made of fibrous thread material into a base fabric the ones that accumulate on the back Foot loops are first subjected to a flame singe treatment partially plasticizing their thread material subjected and then by applying Adhesive mass, e.g. B. latex compound, on the back of the Base fabric to be fixed, and a device for Performing this procedure.

Tufted carpets are generally very bulky, multi-fiber pile threads are used. After this The pile loops are also pulled in at the Back slings of the base fabric very fluffy, which is difficult to fix the foot slings by means of an adhesive, e.g. B. a latex mass, as this is not an intimate one Connects with the fibrous thread material. In addition, the foot slings often fall into place irregular shape and size, which is why after In general, latexing is still proportionate thick layer of foam on the back of the Tufted carpets must be applied to a level Get the underside of the carpet.  

From DE-OS 23 26 702 is known in the manufacture tufting carpets the foot slings of a flame undergo scorching treatment and only then the fixie tion using an adhesive or latex compound. The foot sores shrink due to the flame singe treatment gene so that there with a considerably thinner art foam layer already a complete embedding of the Foot slings is reached. The following this procedure manufactured tufted carpets, however, satisfy not regarding their so-called loop strength speed and wheelchair stability, as well as thermal scorched foot thread loops only a limited connection dope with the adhesive or latex mass. About that in addition, the known method must be proportionate thinly applied adhesive or latex mass thickly applied be what in terms of material consumption and only low processing speeds can be achieved is unsatisfactory.

The invention has for its object a method for fixing the thread loops in the manufacture of Specify tufted carpets through which the Schlin gene wheelchair strength significantly increased, the ver need less adhesive or latex and the Ferti speed can be increased.

To achieve this object, the present invention is carried out hen that immediately after the flame singe treatment thermally plasticized, yet soft thread material in the remaining fibrous part of the foot slings is pressed.  

By this measure, the fibers of the Foot slings to a much greater extent compressed and baked together than at a pure flame singe treatment is possible. Because with the Flame scorching treatment can only be a limited one Heat attack can be made because once that not relatively thermally sensitive base fabric may be damaged and on the other hand also the Foot slings should not be melted too much are allowed to burn, or at least could become brittle. In the procedure according to The foot slings are still only invention partly on its side facing the flame plasticized while attached to their the base fabric remaining fibrous side. By the Impress the plasticized, still soft mass in this fibrous part becomes the foot slings overall towards a monofilament strand compressed with which the adhesive or Latex compound connects much more intimately and therefore one secure fixation of the slings.

In an embodiment of the invention, it can be provided that that the plasticized thread material during the Chilled to about room temperature and on its surface is smoothed. This gives an even closer connection between Foot slings and glue or latex mass.

According to the invention, it can be provided that the foot slings while pushing the plasticized thread material flat on the back of the base fabric and pressed by cooling the plasticized thread material in this flat  Attachment to be fixed. When performing the procedure through these measures, all foot slings continuously on a uniform, proportionate brought low height over the base fabric, so that too their embedding is only a correspondingly thin one Lower layer, e.g. B. made of foam must become. In general, that is enough Apply a thin layer of glue or latex Fixation and embedding of the foot slings, so that a additional foam layer can be saved.

There is a device for performing the method provided which comprises a flame singeing machine in which the tufted carpet to be treated on one Sengstation is continuously passed. According to the invention, the tufting carpet runs through after the scorching station a crushing machine, e.g. B. a Pair of calender rolls, the one on the back of the Carpet roll squeeze roller on about Cooled to room temperature and their roller surface is kept wet by means of a humidifier. The Pressure of the roller is advantageously adjustable and is between one to four tons.

According to a further feature of the invention, the Distance of the roller from the scorching station adjustable his. This makes it possible to adapt to the used thread materials and the Throughput speed of the carpet sheets that Press the foot thread loops at a time to which the melted, plasticized Material is still soft and deformable. The The throughput speed of the carpet web is each depending on the thread material and thread thickness between  2.5 to 45 meters / minute. Are at the scorching station advantageously adjustable cover plates for the non-tufted edge areas of the base fabric arranged to protect them from scorching stay.

The invention is described below with reference to the drawing explained in more detail in the show:

Fig. 1 in a simplified representation of a flame singeing machine with squeezing device for carrying out the method according to the invention,

Fig. 2 seen a partial side view in the direction of arrow II in Fig. 1 and

Fig. 3, 4 and 5 are sectional views of a treated in the machine of FIG. 1, tufted carpets in three successive stages of manufacture.

Figs. 1 and 2 show a flame singeing machine in which a tufted carpet web 1 over guide rollers 2, is fed past a singeing station 4 3 whose singeing flame 5 is directed in the area on the carpet web 1 in which it wraps around the guide roller 3. The deflection roller 3 interacts with a roller 6 arranged downstream of the scorching station 4 as a squeezing mechanism. The pressure of the roller 6 can be adjusted by means of a hydraulic cylinder 7 . The pressure roller 6 is seated on a pivot lever 8 and is adjustable in the direction of the double arrow 9 along a guide track 10 , so that the distance between the scorch flame 5 and the pressing area of the roller 6 can be adjusted. The roller 6 is cooled on the inside by means of a liquid of approximately 16 ° to 17 ° C., a surface temperature of the roller 6 of approximately 25 ° C. being established in continuous operation. The surface of the roller 6 is kept wet by means of the humidifier 11 . On both edges, the nichtgetufteten edge portions 12, 13 of the carpet 1 by cover plates 14, 15 protected from the singeing flame. 5

The carpet web 1 is fed in the schematically illustrated in Fig. 3 intermediate manufacturing stage of the gas singeing machine. Fluffy, fibrous threads are drawn into the base fabric 16 to form pile loops 17 and foot loops 18 .

When walking through the singeing station 4 , the foot loops 18 are singed, where they already shrink somewhat, cf. Fig. 4. On the side facing the flame 5 , the thread material of the foot loops is melted into a plasticized thread material 19 which is initially still soft, while the part 20 of the thread material facing the base fabric 16 still remains fibrous and also a more or less large distance from the base fabric 16 has. When passing through the pair of calender rolls 3 , 6 , the still soft material 19 is pressed into the fibrous part 20 , as illustrated by small arrows 21 in FIG. 5. At the same time, the entire foot sling is pressed tightly against the base fabric 16 . Due to the cooling of the plasticized material 19, which is simultaneously caused by the wet roller 6 , the foot straps solidify in the manner illustrated in FIG. 5, with a relatively smooth skin 22 being obtained. Subsequent application of glue or latex mass surprisingly results in a very intimate connection between the compressed foot loops and the glue or latex mass, which means that the tufted carpet has a very high loop strength and wheelchair strength with little consumption of glue or latex mass .

Reference list

1

Tufted carpet

2nd

Pulley

3rd

Pulley

4th

Scorching station

5

Scorching flame

6

roller

7

Hydraulic cylinder

8th

Swivel lever

9

Double arrow

10th

Guideway

11

Humidifier

12th

Edge area

13

Edge area

14

Cover plate

15

Cover plate

16

Base fabric

17th

Pile loop

18th

Foot sling

19th

soft thread material

20th

part

21

arrow

22

skin

Claims (9)

1. A method for fixing the thread loops in the manufacture of tufted carpets, in which after the pulling in of fibrous thread material, the pile loops in a base fabric, the foot loops occurring on the back side are first subjected to a flame scorching treatment with partial plasticization of their thread material, and and are then fixed to the back of the base fabric by applying adhesive, in particular latex, characterized in that immediately after the flame singe treatment, the thermally plasticized, yet soft thread material ( 19 ) in the fibrous part ( 20 ) of the foot loops ( 18 ) is pushed in. 2. The method according to claim 1, characterized in that the plasticized thread material ( 19 ) is cooled to about room temperature during the indentation and smoothed on its surface. 3. The method according to claims 1 and 2, characterized in that the foot loops ( 18 ) during the impression of the plasticized thread material ( 19 ) pressed flat against the back of the base fabric ( 16 ) and by cooling the plasticized thread material ( 19 ) in this flat system can be fixed. 4. Device for fixing the thread loops in the manufacture of tufted carpets, in particular for carrying out a method according to one of claims 1 to 3, by means of a flame singeing machine, in which the tufting carpets to be treated ( 1 ) at a scorching station ( 4 ) is continuously guided past, characterized in that after the scorching station ( 4 ) there is a squeeze mechanism in the form of a pair of calender rollers ( 3 , 6 ) through which the tufting carpet web ( 1 ) runs, that the squeezing mechanism moves onto the back of the tufting carpet web ( 1 ) acting squeeze roller ( 6 ) which can be cooled to about room temperature and which the surface of the squeeze roller ( 6 ) can be kept wet by means of a humidifier ( 11 ). 5. The device according to claim 4, characterized in that the pressure of the roller ( 6 ) is adjustable. 6. The device according to claim 5, characterized in that the pressure of the roller ( 6 ) is between one to four tons. 7. Device according to one of claims 4 to 6, characterized in that the distance of the roller ( 6 ) from the scorching station ( 4 ) is adjustable. 8. Device according to one of claims 4 to 7, characterized in that the throughput speed of the carpet web ( 1 ) is between 2.5 to 45 meters / minute. 9. Device according to one of claims 4 to 8, characterized in that at the scorching station ( 4 ) adjustable cover plates ( 14 , 15 ) for the non-tufted edge areas che ( 12 , 13 ) of the base fabric ( 16 ) are arranged.