EP1083250B1 - Round comb clothing - Google Patents

Description

The invention relates to a set for processing in the form of a sliver supplied fibers can be used and rotated around a rotation axis with at least two circumferential directions of a circular cylinder circumferential surface encircling the axis of rotation successively arranged clothing segments, of which the a rotation of the round comb first engaging in the sliver Engaging segment produces less combing effect than at least one of the Sliver thereafter running through subsequent segments, with at least one of the subsequent segments has a greater length in the circumferential direction than the engagement segment with such a set equipped round comb and such a round comb comber.

Equipped with trimmings of the type described above Round combs are used in the processing or finishing of Fibers in combing machines for the separation of short fibers and Nits and shell parts from the already carded raw fiber material used. The combing process turns the stack, i.e. the fiber length of the raw fiber material is standardized. To for this purpose the combing machine is usually between the Card and the track arranged.

In the combing machine, one is preferably already carded Fibers existing with a fiber sliver a sliver of already combed fibers soldered by held by a pair of pliers and run through by the tines of the circular comb The whole process of engaging the comb teeth in the fiber beard about combing and soldering until intervention of the round comb into a new fiber bit is called "comb play".

Conventional circular combs are essentially cylindrical Carrier body, with the comb over one Part of the cylinder circumference extends. During the operation of the Combing machine turns the round comb around the cylinder axis and is arranged with respect to the pliers so that the tines of the Comb can pass through the fiber beard held by the pliers, but the support body when turning the circular comb further soldering the combed fiber beard does not hinder. Usually For this purpose, the circular comb is constructed in such a way that on the cylindrical support body, the support body in radial Direction expanding body is attached to which the actual circular comb set is fixed.

When developing circular combs were initially from Circular needles formed sets used. With such Round combing was able to maintain a satisfactory combing effect Processing speeds of 100 to 110 combs per minute can be achieved. An increase could be achieved by replacing the circular needles with sawtooth all-steel fittings processing speed of up to 350 combs per minute can be achieved, without impairing the combing effect. Another increase in Processing speed could be without influencing the actual combing result by the further development of the conventional specified in DE 43 26 205 C1 Round combs can be achieved in which a between the set and the support body Avoiding a dynamic pressure in front of the fitting serving channel is arranged.

When using the circular combs described in the above-mentioned document was first at high working speeds damage to the fibers to be processed observed. In order to remedy this deficiency, the sets described at the outset were used Kind proposed in which with the engagement segment a low damage Intervention of the clothing in the fiber beard is achieved while using the following segments the desired combing result can be produced. Such sets are given, for example, in DE 196 49 808 A1. When using sawtooth wire strips formed sets is the higher combing effect of the following segments in the known sets by a corresponding reduction in the distance between the tooth tips of the saw teeth of the following segments compared to the distance reached between the tooth tips of the engaging segment. With this continuing education of At up to 400 combs per minute, sets were still satisfactory Combing effect can be achieved, but it has been shown that at this high Processing speed still available after the actual combing process standing time no longer for soldering the combed or still to be combed fiber beard with a sliver consisting of already combed fibers is sufficient. Therefore the next development step was to shorten the clothing length by initially more than 120 ° in the circumferential direction of the circular comb to less than 110 ° in the circumferential direction of the circular comb, so even at high processing speeds to provide enough time for soldering. It has however, shown that in the last described training of circular combs there is considerable impairment of the combing result.

In view of this problem in the prior art, the object of the invention to provide a set of the type described in the introduction, when used even at high working speeds of 400 combs per minute or more enough time to ensure a satisfactory combing result for soldering the combed fiber beard with an already existing combed fiber Sliver can be provided.

According to the invention, this object is achieved in the characterizing part of the claim 1 specified further development of the known sets solved.

This invention is based on the knowledge that a gentle and low damage Intervention of the round comb set in the fiber beard presented already then can be ensured if the engagement segment is only a very small Angle extends in the circumferential direction of the circular comb, so that ensuring a damage-free engagement of the circular comb set by the comparative short engagement segment a large clothing length for the more effective Garnish segments can be provided without doing so increase the total length of the clothing in the circumferential direction. Overall, using a set that can overall in the circumferential direction of the circular comb Angles of less than 110 °, preferably less than 100 ° especially preferably extends about 90 ° without damaging the processing fibers achieved a satisfactory combing result become. This means that even at high processing speeds of 400 comb games per minute or more provided enough time for the soldering process can be.

With the circular comb according to the invention can under Avoiding excessive fiber damage a particularly good combing result with a particularly short clothing length be achieved if the set is at least two, preferably has at least three successive segments, each of which produces a higher combing effect and / or a larger one Has length than the previous following segment or Engaging segment.

One is at an angle of less as a 110 °, particularly preferably about 90 °, extending set a satisfactory combing result without damage to fibers possible when the clothing engages in the sliver, when the ratio of the length of the engaging segment to that of the last following segment in the range from 1: 2 to 1: 4 lies.

When using a four in a row in the circumferential direction arranged set of clothing segments can at an angle of approximately 90 ° A particularly good combing result can be achieved, if the lengths of the individual clothing segments start out behave like from the intervention segment to the last following segment 1: 1.2 (± 0.1): 1.8 (± 0.5): 3 (± 2). The put in brackets specified values the possible deviations from the without Brackets are particularly preferred values.

As already explained in detail above, it is particularly advantageous when using high-performance combing machines, if at least one of the clothing segments, preferably but all clothing segments, a plurality of in the direction sawtooth wire strips arranged side by side on the axis of rotation having. With such trimmings can be compared to Engagement segment achieved higher combing effect of the following segments when the distance between the tooth tips of the sawtooth wire strips of the engaging segment is larger than that at least between the tooth tips of the sawtooth wire strips one of the following segments, preferably all of the following segments.

With one in the circumferential direction of the circular comb an angle of approximately 90 ° extending clothing a particularly high combing effect while ensuring low damage Engagement of the set ensures if the ratio of the distance between the tooth tips of the engaging segment to the one between the tips of the teeth last following segment in the range from 1: 0.2 to 1: 0.4 is preferably about 0.35.

In the last described embodiment of the invention is arranged using four in a row Clothing segments achieved a particularly good combing result, when the distances between the tips of the teeth starting out behave from the engaging segment to the last subsequent segment as 1: 0.7 (± 0.2): 0.55 (± 0.1): 0.3 (± 0.1), with the in Values given in brackets indicate the possible deviations from the represent particularly preferred values given without brackets. The distance between the tooth tips is of the engaging segment in an elongated arrangement, i.e. before adjustment of the corresponding sawtooth wire to the circular cylinder surface the base body preferably about 4 to 5 mm, particularly preferably about 4.47 mm.

In addition or as an alternative to the last described Embodiments of the invention with changing intervals between the tooth tips of the individual clothing segments or a variable tooth pitch can be compared to Engagement segment higher combing effect of the following segments also as a result be achieved that the width of the between the sawtooth wire strips of the engagement segment formed lanes in a direction parallel to the axis of rotation is less than the width of the trim alleys at least one of the following segments, preferably all of the following segments. This increase in the combing effect of the following segments can can be achieved, for example, in that the foot width of the Sawtooth wire strips of the following segments with the same Blade width compared to that of the engaging segment Sawtooth wire strips is increased. In a particularly preferred one Embodiment of the invention is the foot width of the the sawtooth wire strip forming the engagement segment, for example 0.8 mm, while the following segments a foot width of 0.65, 0.6 or 0.5 mm with the same blade width exhibit.

Another additional or alternative way to Increasing the combing effect of the following segments compared to that of the engaging segment is the saw teeth to provide the interventional part with a smaller chest angle, than those of at least one of the following segments, preferably all subsequent segments. The chest angle is the sawtooth wire strips forming the engagement segment in the stretched state, i.e. before mounting on the base body of the round comb, preferably about 30 °, during the Breast angle of the sawtooth wire strips forming the following segments in the stretched state about 35 °, 40 ° and also with the last following segment is still 40 °. In other applications, such as when combing short-staple cotton who only want a little combing, can Breast angle of all subsequent segments as well as the breast angle of the engagement segment are 30 °. On the other hand, at processing of long-stack material the chest angle of the last subsequent segment up to 55 °, with the Chest angle of the other following segments should be increased accordingly can.

Finally, with the circular comb sets according to the invention also be provided that the tooth height of the saw teeth of the engagement segment is larger than that of the saw teeth at least one of the following segments, preferably all of them Follow segments.

In a particularly advantageous embodiment of the invention are all the measures explained above in the following segments taken to increase the combing effect, while maintaining a trouble-free operation of the combing machine expediently all clothing segments have approximately the same clothing height.

As the above explanation of sets according to the invention can be seen has a round comb made with it an approximately circular cylindrical support body, one over extending part of the circumference of the cylinder and the support body in the radial direction expanding body as well a set attached to the base body, the Set of at least two consecutively arranged in the circumferential direction Set segments with different from each other Combing effects, of which at least one of the following the engaging segment is followed by sliver segments has a greater length in the circumferential direction than that Engaging segment.

Fig. 1

eine schematische Radialschnittansicht eines erfindungsgemäßen Rundkamms,

Fig. 2a bis 2d

Detaildarstellungen von Sägezahndrahtstreifen, die zur Herstellung der einzelnen Garnitursegmente des in Fig. 1 dargestellten Rundkammes eingesetzt werden können.

The invention is explained below with reference to the drawing, to which reference is expressly made with regard to all details that are essential to the invention and are not detailed in the description. The drawing shows:

Fig. 1

1 shows a schematic radial sectional view of a circular comb according to the invention,

2a to 2d

Detailed representations of sawtooth wire strips, which can be used to produce the individual clothing segments of the circular comb shown in FIG. 1.

The circular comb shown in Fig. 1 essentially comprises circular cylindrical support body 10, one in the circumferential direction over part of the circumferential surface of the circular cylindrical shell Carrier body 10 extending and this in the radial direction expanding body 20 and a sawtooth all-steel set labeled 30, which is attached to an outer surface of the base body 20. The from the set 30, the base body 20 and the support body The overall arrangement formed is around the cylinder axis 12 of the carrier body 10 rotatable, as indicated by the arrow 14. The set 30 consists of a total of 4 in the circumferential direction clothing segments 32, 34, 36 arranged one behind the other and 38, of which the hereinafter referred to as the engagement segment Set segment 32 with a rotation in the through arrow 14 direction first in a to be combed Fiber beard engages while the clothing segments 34, 36 and 38 (hereinafter referred to as follow segments) the fiber beard go through in that order.

Each of the clothing segments 32, 34, 36 and 38 consists of a plurality of side by side in the direction of the cylinder axis 12 arranged sawtooth wire strips. It stretches the engaging segment 32 in the circumferential direction of the carrier body 10 or the base body 20 over an angle α of approximately 13 °, the first following segment 34 thereafter over an angle β of about 15.5 °, the second following segment 36 following the first following segment 34 over an angle γ of approximately 23.5 ° and the third follow segment 38 following the second follow segment 34 over an angle δ of about 38 °, so that the entire set 30 in the circumferential direction over an angle of extends about 90 °. As already shown in FIG. 1 is recognizable is the distance between the tips of the teeth Follow segments 34, 36 and 38 each less than the distance between the tooth tips of the preceding following segment 36 and 34 or the engaging segment 32. This alone that the combing action of the clothing 30 when driving through a fiber beard continuously from clothing segment to clothing segment increases while with the engaging segment 32 a more gentle Intervention in the fiber beard is achieved.

Further details on the production of the clothing segments 32, 34, 36 and 38 used sawtooth wire strips 2a to 2d in connection with the following description refer to.

2a to 2d are for the production of the clothing segments 32, 34, 36 and 38 insertable sawtooth wires 33, 35, 37 or 39 in the stretched state, i.e. before mounting on the Base body 20 shown.

In the illustrated in Fig. 2a and for the production of Tray segment 32 serving sawtooth wire 33 is the Distance d between the tips of successive teeth about 4.47 mm. The total height h of the sawtooth wire is 4.5 mm, the chest angle ε is 30 ° and the width b of the sawtooth wire base is 0.8 mm.

In the shown in Fig. 2b and for the production of Tray segment 34 insertable sawtooth wire 35 is the Distance d between the tips of successive teeth about 3.14 mm, the clothing height h about 4.5 mm, the foot width b about 0.65 mm and the chest angle ε about 35 °.

In the shown in Fig. 2c and for the production of Tray segment 36 insertable sawtooth wire strip 37 the distance between the clothing tips is consecutive Teeth about 2.502 mm, the clothing height h about 4.5 mm, the foot width b about 0.6 mm and the chest angle ε about 40 °.

Finally, the one shown in Fig. 2d and for production of the following segment 38 usable sawtooth wire strips 39 a distance d between the clothing tips successively Teeth of about 1.574 mm, a clothing height h of about 4.5 mm, a foot width b of about 0.5 mm and a chest angle ε from about 40 °.

The invention is not explained on the basis of the drawing Embodiment limited. Rather, it is also on the Use of clothing with more or less than 4 clothing segments thought. The set as a whole can also extend over an angle of more or less than 90 °. Furthermore, the sawtooth wire strips of the individual clothing segments also the same foot width, the same distance between the tooth tips of successive teeth and / or the same Chest angle or from the illustrated embodiment have different dimensions as long as it is ensured that the combing action of one of the following segments 34, 36 and 38 is larger than that of the engaging segment 32.

Claims (13)

1. Clothing (30) for a circular comb usable for the preparation of fibres supplied in the form of a sliver, and rotatable about a rotational axis (12), with at least two clothing segments (32, 34, 36, 38) arranged one behind the other in the circumferential direction of a cylindrical surface extending around the rotational axis (12), of which the leading segment (32) i.e. the segment engaging first into the sliver upon rotation of the circular comb about the rotational axis (12) produces a gentler combing action than at least one of the follow-on segments (34, 36, 38) i.e. the segments running through the sliver after the leading segment, at least one of the follow-on segments (34, 36, 38) having a greater length in the circumferential direction than the leading segment (32), characterized in that the clothing (30) as a whole extends over an angle of less than 110° in the circumferential direction, an angle of less than 100° being preferred, and an angle of about 90°, especially preferred, and the ratio of the length of the leading segment (32) to that of the last follow-on segment (38) is in the region of 1 : 2 to 1 : 4.
2. Clothing according to Claim 1, characterized by at least two, and preferably at least three, follow-on segments, each of which produces a stronger combing action and/or has a greater length than the follow-on segment (34, 36) preceding it, and/or than the lead-in segment (32).
3. Clothing according to either of the preceding claims, with four clothing segments (32, 34, 36, 38) arranged one behind the other in the circumferential direction whose lengths, proceeding from the leading segment (32) to the last follow-on segment (38), are in proportions of 1 : 1.2(±0.1) : 1.8(±0.5) : 3(±1).
4. Clothing according to any one of the preceding claims, characterized in that at least one of the clothing segments (32, 34, 36, 38), and preferably each clothing segment (32, 34, 36, 38), has a plurality of sawtooth wire strips (33, 35, 37, 39) arranged side by side in the direction of the rotational axis (12).
5. Clothing according to Claim 4, characterized in that the pitch (d) of the points of the teeth of the sawtooth wire strips (33) of the leading segment (32) is greater than that of the points of the teeth of the sawtooth wire strips (35, 37, 39) of at least one of the follow-on segments (34, 36, 38).
6. Clothing according to Claim 5, characterized in that the ratio of the pitch (d) of the points of the teeth of the leading segment (32) to that of the points of the teeth of the last follow-on segment (38) is in the region of 1 : 0.2 to 1 : 0.4, and is preferably about 1 : 0.35.
7. Clothing according to Claim 6 with four clothing segments (32, 34, 36, 38) arranged one behind the other wherein the pitches of the points of the teeth, proceeding from the leading segment (32) to the last follow-on segment (38), are in proportions of 1 : 0.7(±0.2): 0.55(±0.1) : 0.3(±0.1).
8. Clothing according to any one of Claims 4 to 7, characterized in that the width of the clothing streets formed between the sawtooth wire strips (33) of the leading segment (32) in a direction parallel with the rotational axis (12) is smaller than the width of the clothing streets of at least one of the follow-on segments (34, 36, 38), and preferably of all follow-on segments (34, 36, 38).
9. Clothing according to any one of Claims 4 to 8, characterized in that the saw teeth of the leading segment (32) have a smaller breast angle (ε) than those of at least one of the follow-on segments (34, 36, 38), and preferably of all follow-on segments (34, 36, 38).
10. Clothing according to any one of Claims 4 to 9, characterized in that the height of the saw teeth of the leading segment (32) is greater than that of the saw teeth of at least one of the follow-on segments (34, 36, 38), and preferably of all follow-on segments.
11. Clothing according to any one of Claims 4 to 10, characterized in that all clothing segments (32, 34, 36, 38) have the same clothing height (h).
12. Circular comb with a clothing (30) according to any one of the preceding claims.
13. Combing machine with a circular comb according to Claim 12.

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