JP2010216066A - Comb set for combing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a top comb for a combing machine which further enhances combing efficiency. <P>SOLUTION: The top comb (1) for the combing machine which has a carrier (2) to which a comb set (5) having a plurality of teeth (Z) arranged adjacent to each other are attached. The comb set (5) has a dimension of 40-70 teeth/cm, advantageously 50-65 teeth/cm. The comb set (5) is manufactured to have a final shape by powder injection molding (PIM). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a top comb of a combing machine, wherein a support is provided, and a comb set having a plurality of teeth arranged adjacent to each other is attached to the support. . The invention also relates to a method for producing a comb set of top combs.

  Such a comb set is used, for example, in a circular comb or top comb (fixed comb / Fixkamm) of a combing machine and serves to comb the fiber material fed to such a comb. The quality and shape of the comb set ultimately determines the quality of the final product produced on each combing machine, and this final product is delivered to subsequent equipment for further processing. For the uniform processing of the fiber mass to be fed, the comb set must be provided with the same geometric ratio throughout the effective length, for example the same plurality of through-holes (passages for the textile) ) Must be provided.

  Known comb sets, such as for example top combs, as shown for example in DE-19531605, are manufactured from stamped saw teeth which are arranged adjacent to each other and bonded to a top comb support. ing. The saw blade is provided with a corresponding cross-sectional shape by means of a roller, so that when the individual saw teeth are aligned with each other, a passage is formed between the tooth legs of the individual saw teeth and the tooth tips. Combing machines operating at today's high combing cycle counts require obtaining the required percentage of combing and at the same time obtaining as high-quality and efficient combing as possible in order to better separate impurities and neps. It is done.

  Thus, the patent specification EP-1526193 increases the tooth density of the comb sets used so far, for example from 32 teeth per cm to more than 33 teeth, preferably more than 35 teeth. It has been proposed. Increasing to 35 teeth / cm or more has not been studied in this known technique.

DE-19531605 Patent Specification EP-1526193A1 Patent Specification DE-102006030763 Patent Specification DE-102006009732 Patent Specification DE-19736582A1 specification

  Accordingly, an object of the present invention is to improve the conventional configuration so as to further increase the combing efficiency.

  In order to solve this problem, in the configuration of the present invention, the comb set of the top comb has 40 to 70 teeth / cm, preferably 50 to 65 teeth / cm.

  Furthermore, it is proposed that the ratio (B / D) of the tooth width and the passage width between the plurality of teeth is 0.5-2.

  This ratio is preferably 1: 1. With such a geometric ratio, good combing efficiency can be obtained.

  It is likewise advantageous for combing efficiency if the ratio between the tooth depth and the passage width (T / D) is between 25 and 55, preferably between 30 and 50.

  Furthermore, it is proposed that the passage depth is 2 to 4.5 mm and the passage width is 0.05 to 0.12 mm.

  As further proposed, the tooth width may be 0.05 to 0.12 mm.

  In order to simplify the assembly and removal and to adapt to the corresponding manufacturing method of such a comb set, the comb set is formed in one piece and has a plurality of tooth leg regions arranged adjacent to each other. It is proposed to follow two common webs.

  A comb set consists of a plurality of set elements arranged in a row adjacent to each other, for example for manufacturing technical reasons.

  In the DE-102006030763 and DE-102006009732 patents it has already been proposed to form the comb set in one piece. In this case, a plurality of rows of such comb sets are also shown adjacent to each other. The number of teeth per 1 cm is not described. Due to the use of an integrally formed comb set, handling during assembly and removal is easier than a comb set consisting of individual teeth adjacent to each other. In order to manufacture an integrally formed comb set, it is proposed in the above known literature to manufacture a slit or a tooth passage from a raw material block by spark processing or grinding. Furthermore, it has been proposed to produce the final tooth shape by further processing steps, such as milling or grinding. According to the manufacturing method described here, a comb set with higher dimensional accuracy than that of a known configuration can be obtained. However, the disadvantage of this manufacturing method is that it takes time and effort, and therefore the manufacturing cost is high. Until the final state is reached, the unprocessed part of the comb set to be manufactured has to be retightened several times in some cases, which takes time and increases the risk of manufacturing errors.

  Thus, in order to eliminate such manufacturing technical drawbacks, the method according to the present invention for manufacturing an integrated comb set for a top comb allows the comb set to be finalized by powder injection molding (PIM). To manufacture. Advantageously, it is proposed to produce the comb set by means of ceramic powder injection molding (CIM). In order to further increase the wear strength, the teeth surfaces of the comb set can be painted and / or coated following injection molding.

  If the comb set consists of a plurality of set elements arranged in a row adjacent to each other, for example, each individual set element can be manufactured separately. Thereby, the individual length of the comb set manufactured at the time of injection molding can be reduced, and the shape shift | offset | difference which arises by the thermal influence depending on the case can be avoided by this. The method described in the claims of the present invention provides a high dimensional accuracy with a slight manufacturing error even for very small dimensions, thereby producing a comb set with a high tooth density per unit of length. You can also.

  The term “PIM” means “Powder Injection Molding”.

  It should be understood that this superordinate concept of PIM also advantageously includes the proposed ceramic powder injection molding method (CIM = Ceramic Injection Molding) and metal powder injection molding method (MIM = Metal Injection Molding).

  It should be understood that the concept of “powder injection molding” is the entire manufacturing process up to the final set part. This process consists of “injection molding”, followed by “degreasing” of “Gruenling” taken out of the injection mold, followed by “browning” in the case of metal from the degreasing station. ) ”Or“ sintering ”of“ white base (in case of Weissling, ceramic) ”. With the proposed method, an integrated comb set with high density per cm and high dimensional accuracy and high strength can be produced in a simple manner. Actual shaping is performed in an injection mold, and degreasing and sintering performed after injection molding are performed to strengthen the material structure.

  If the wear strength needs to be further increased, the tooth surface can be further painted and / or coated following powder injection molding (including degreasing and sintering). One or a plurality of comb sets can be fixed to a support, for example, and fixed to the machine frame of the combing machine via the support.

  Further advantages of the present invention are shown and described in detail in the following examples.

FIG. 2 schematically shows a top comb with a comb set having a high tooth density per centimeter according to the invention and produced, for example, by injection molding. It is the schematic side view seen in the X direction of FIG. It is a flowchart which shows roughly the manufacturing process of the comb set by injection molding.

  FIG. 1 shows a top comb 1 of a combing machine. A side view of the combing machine as viewed in the direction X is shown in FIG. For example, as shown in FIG. 1 of German Patent Publication No. 19736582, the top comb 1 is in the assembled position between the detaching roller pair and the front end of the lower nipper plate of the nipper unit. positioned. A top view of the top comb holder is not shown in this embodiment. Only the support 2 (plate) which is connected to a top comb holder (not shown) and to which a comb set 6 is connected via a rivet 4 is shown. The comb set may be fixed to the support 2 by other means, for example, by screws or by bonding or welding.

  As further shown in FIG. 1, in the present invention, a comb set consists of three comb sets 5a-5c located adjacent to each other, each of which is a series of adjacent ones. It has teeth Z (needles) and is fixed to the support 2 via rivets 4. A passage G is provided between the teeth Z in order to pass through the fibers to be combed which are conveyed in the conveying direction F to the comb set 5. The passage G in this embodiment has a passage width D and a passage depth T, and the tooth Z has a tooth width B. In this example, with respect to the thickness of the teeth, the shape of the teeth extending uniformly is shown. However, multiple tooth shapes are possible that can be produced by the method according to the claims. For example, the end of the tooth may be sharpened as shown in German Offenlegungsschrift 197336582. In such a case, the ratio further described below between the tooth thickness and the passage width is at the point where the passages extend in parallel and have the smallest spacing.

  As shown in FIG. 2, the individual teeth Z have a shape bent backwards in order to draw the fibers into the comb set 5 for the combing process. Each tooth Z is provided with a slightly wider tooth leg 7 as viewed in the conveying direction F, and this tooth leg 7 continues to the web 8 of each comb set 5a-5c. .

  The individual comb sets 5a-5c can in this case have up to 70 teeth / cm, advantageously 50-65 teeth / cm. Thereby, the combing work can be enhanced even if the number of cycles of the combing operation is large. The ratio between the tooth width B (seen in a direction perpendicular to the conveying direction F) and the passage width D is in this case between 0.5 and 2, preferably this ratio is 1: 1. In order to maintain a correspondingly sufficient penetration for complete gripping of the textile to be combed, the ratio of the passage depth T to the passage width D is 25 to 55, preferably 30 to 50. Proposed. This also depends on the number of teeth in 1 cm selected (number of teeth / cm). The depth T of the passage G can in this case be 2 to 4.5 mm, and its width can be selected from 0.05 to 0.12 mm. For example, based on the above small dimensions of the tooth width B of 0.05 to 0.12 mm and the small passage width D, under high tooth density (number of teeth / unit of length), accurately in mass production and thus In order to obtain a uniform comb set 5 over the entire effective width, it is necessary to select a manufacturing method as precise as possible. That is, when manufacturing a comb set, minimal errors are allowed to obtain a top comb comb set that ensures that the fiber is combed uniformly without any problems. In this case, it is proposed according to the invention to use an injection molding method. In the injection molding method, it is possible to guarantee the production of a comb set having a precise and accurate dimension in one method step even at a high tooth density.

  Such a method is schematically illustrated, for example, in the flowchart shown in FIG.

  In this case, the ceramic powder (or metal powder) and the binder (binder) are mixed or kneaded and granulated. The granules thus formed are formed by injection molding into an intermediate product, a Gruenling, using corresponding equipment and molds. The shape of the green body already corresponds to almost the final shape of the comb set to be manufactured, but does not yet have the desired strength. During the subsequent “degreasing”, most of the binder is removed from the green body, which results in an already reinforced white body (or Braunling if metal). This is brought to final strength at a correspondingly high temperature by subsequent “sintering” and becomes the finished part of the comb set. Comb sets produced in this way have a high strength, especially with respect to wear, which ensures a long service life and functionality of the comb set. In order to further increase the wear strength, in particular, a surface coating in the tooth area can be performed with additional method steps, as indicated by the dotted lines in the flow chart of FIG. In this case, thin film technology, electroplating, and painting can be performed. If necessary, the surface can be processed by sandblasting, slide grinding, polishing, or lapping.

  After the production has ended, the comb sets thus produced are placed on the support 2 side by side in a device that is correspondingly formed for this purpose and are connected to the support 2 by means of rivets 4.

  According to the proposed method, it is possible to produce comb sets with very accurate dimensions, for example for high tooth densities of 40 teeth / cm or more, in one way without post-processing. This example describes the manufacture of a comb set for the top comb of a combing machine. However, it is also possible to produce a comb set of circular combs by the method described in the claims of the present invention.

  1 top comb, 2 support, 4 rivets, 5, 5a, 5b, 5c comb set, 7 tooth leg, 8 web, F transport direction, Z tooth, B tooth width, G path, D path width, T path depth The

Claims (12)

A top comb (1) of a combing machine, which is provided with a support (2), and the support (2) includes a comb set having a plurality of teeth (Z) arranged adjacent to each other ( 5) is the type that is attached,
Top comb of a combing machine, characterized in that the comb set (5) has 40 to 70 teeth / cm, advantageously 50 to 65 teeth / cm.   The top comb according to claim 1 whose ratio (B / D) of tooth width (B) of a tooth (Z) and passage width (D) between a plurality of teeth is 0.5-2.   The top comb according to claim 2, wherein the ratio (B / D) of the tooth width (B) to the passage width (D) is 1: 1.   4. Top according to claim 1, wherein the ratio (T / D) of the interdental passage depth (T) to the passage width (D) is 25 to 55, preferably 30 to 50. 5. Comb.   The top comb according to any one of claims 1 to 3, wherein the passage depth (T) is 2 to 4.5 mm.   The top comb according to any one of claims 1 to 3, wherein the passage width (D) is 0.05 to 0.12 mm.   The top comb according to any one of claims 1 to 3, wherein a tooth width (B) is 0.05 to 0.12 mm.   Comb set (5) is integrally formed and leg regions (7) of a plurality of teeth (Z) arranged adjacent to each other follow a common web (8). The top comb of any one of 1-3.   9. The top comb according to claim 8, wherein the comb set (5) consists of a plurality of set elements (5a, 5b, 5c) arranged in a row adjacent to each other.   10. Comb set (5) for top comb (1) according to claim 8 or 9, characterized in that the comb set (5) is manufactured to a final shape by powder injection molding (PIM) Way for.   10. The method according to claim 9, wherein the comb set (5) is produced by ceramic powder injection molding (CIM).   12. Method according to claim 10 or 11, wherein the surface of the teeth (Z) of the comb set (5) is painted and / or coated following powder injection molding.

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