JP6333247B2 - Method and kit for adjusting the advancement of the fiber web to the detaching cylinder of the combing machine - Google Patents

Description

  The present invention relates to a method for adjusting the advance of a fibrous web in a combing machine to a detaching cylinder of the combing machine.

  In the yarn preparation line, after the initial stage of fiber opening and washing, carding is performed by a carding machine, and the fibers appear in a web shape.

  After processing, the web or wrap is combed by a combing machine to obtain a highly parallel and clean web of fibers on a wrap winder where various, if any, separate webs are combined to form a wrap.

  The combing machine includes a nipper group including a lower jaw, an upper jaw, and a supply cylinder and supported by a lower frame, and one or more pairs of detaching cylinders downstream of the nipper group.

  The web introduced into the combing machine is conveyed to a supply cylinder that has intermittent motion and pinches and maintains the web and simply emerges a tuft; the tuft is combed at the head by a circular comb and removed by a detaching cylinder , Combed at the tail by a straight comb and connected to the preceding tuft.

  The length of the tuft supplied by the supply cylinder is particularly important for the quality of the web, and generally the shorter the tuft, the better the quality, but the shorter the tuft, the lower the productivity of the plant.

  Depending on the type of fibers being processed and the quality required of the web, the nipper group adjustment operation requires changing the length of the tuft by changing the intermittent rotation entity of the supply cylinder.

  In designing a combing machine, it is necessary to bear in mind the necessity of performing such adjustment work. These needs dictate the design and, in particular, the definition of the laws of motion governing the alternating motion of the particularly complex jaws.

  Furthermore, such adjustment work involves a long machine downtime and a test process prior to resuming operation, resulting in a decrease in plant productivity.

  It is an object of the present invention to provide a method for adjusting the intermittent motion of a feeding cylinder of a combing machine that satisfies the above-mentioned requirements and overcomes the advantages mentioned with reference to the prior art.

  Such an object is achieved by an adjustment method performed according to claim 1.

  The features and advantages of the adjustment method according to the invention will become apparent from the following description, given by way of non-limiting example with reference to the accompanying drawings.

It is a figure which shows the nipper group of the combing machine suitable for performing the adjustment method by this invention. It is a typical side view of the nipper group of FIG. 3a, 3b and 3c show the nipper group of FIG. 1 with different large gears.

  The combing machine according to the present invention comprises a nipper group 1 and a circular comb which is located under the nipper group and is suitable for rotational movement.

  The nipper group 1 includes a nipper 4. The nipper 4 is integrated with the lower jaw 6 supported by the lower frame 7, the upper jaw 8 supported by the upper frame 9 and hinged to the lower jaw 6 on the hinge shaft 10, and the lower jaw in the front region. And a straight comb.

  The nipper group 1 further includes a supply cylinder 12 that is supported by the lower jaw 6 and rotates according to instructions. The supply cylinder 12 is thereby positioned in the nipper 4.

  A plurality of pairs of detaching rollers that are rotated by alternating rotations according to instructions are provided downstream of the nipper group 1.

  The nippers 4 move back and forth alternately. In the advanced position, the jaws 6, 8 are opened close to the detaching roller, allowing combing of the tuft tail with a straight comb. In the nipper retracted position, the jaws 6 and 8 are spaced apart from the detaching roller and are pinched closed to allow for combing of the tuft head with a circular comb.

  During the nipper advancement step, that is, when the nipper moves from the retracted position to the advanced position, or during the return step, that is, when the nipper moves from the advanced position to the retracted position, the supply cylinder is intermittent in the forward direction A. Rotation and advance the section of the web to form a new tuft to be combed.

  For this purpose, the nipper group includes a large gear 14 that is rotationally connected to the supply cylinder 12. For example, the large gear 14 is detachably and coaxially attached to the axial end of the supply cylinder 12.

  The large gear 14 includes a plurality of teeth 16 that are continuous in the circumferential direction, and a gap 18 is formed between the teeth.

  The nipper group 1 further includes intermittent drive means for the large gear 14 synchronized with the nipper 4.

  For example, the intermittent drive means includes a lever 20 that is hinged to the upper frame 9 and is suitable for engaging with the large gear 14 and rotating in the forward direction A.

  Preferably, the lever 20 includes a terminal end 22 suitable for being inserted into the gap 18 between the teeth 16 of the large gear 14.

  The lever 20 is rotatable in synchronism with the nipper 4 so that the lever 20 rotates when the lower jaw 6 is in a predetermined position with respect to the detaching cylinder.

  For the large gear 14 having a characteristic diameter D, the pitch p and the number of teeth Z are defined. The diameter D, pitch p, and number of teeth Z are related by the formula p * Z = n * D.

  In each combing cycle, the lever causes the gear 20 to perform a controlled rotation according to the pitch. That is, the terminal end 22 of the lever is separated from the gap 18 and engages with the adjacent gap.

  It is assumed that the nipper group 1 includes a large gear 14 'having a diameter D1, a number of teeth Z1, and a pitch p1.

  At each combing machine stroke, the feed cylinder rotates and corresponds to a predetermined advance of the web.

  In order to achieve various advancements of the web, the adjustment method is such that the first large gear 14 'has a pitch p2 substantially equal to the pitch p1 of the first large gear 14' and the teeth of the first large gear 14 '. An exchange is provided for a second large gear 14 '' having a different number of teeth Z2 from the number Z1 and a diameter D2 different from the diameter D1 of the first large gear 14 '.

  Following such an exchange, the second large gear 14 '' is placed in an angular position allowing engagement with the intermediate drive means, i.e. the two teeth of the second large gear 14 ''. It is arranged with a terminal end 22 of the lever 20 that can be inserted into the gap between them.

  The pitch p2 of the second large gear 14 ″ is “substantially equal” to the pitch p1 of the first large gear 14 ′, which is slightly less than these two pitches in order to offset the variation in spacing or dimensions. That means there can be a difference.

  In any case, according to this adjustment method, after the first gear 14 ′ is replaced with the second gear 14 ″, the mutual distance between the jaws can be changed without changing the nipper configuration. Rather, the step of engaging the advancing means with the second gear 14 '' follows.

  The adjustment method provides for the use of a plurality of large gear kits having substantially equal pitch p, different number of teeth Z, ie different diameters D.

  Further, when one large gear needs to be replaced with another large gear having a different number of teeth, the present adjustment method allows such replacement in any configuration of the nippers. That is, unlike the case of the prior art combing machine, the nipper group does not need to have a specific adjustment configuration defined by the diameter.

  Preferably, the adjustment method according to the present invention is such that the nippers are defined in the lower jaw 6 and the upper jaw 8 only in the first adjustment, which is an adjustment performed by a professional engineer to incorporate the combing machine into the spinning line. What is necessary is just to use the default adjustment configuration placed at the mutual position.

  Innovatively, the adjustment method according to the invention meets the requirements and overcomes the drawbacks mentioned for the prior art.

  Advantageously, in practice, the present adjustment method replaces one large gear with another large gear so that the web position of the web can be changed without changing the mutual position between the nipper jaws in the configuration employed during this adjustment. Allows quick adjustment of the forward movement.

  According to a further advantageous aspect, the adjustment method allows a simplification of the design phase, in particular the relative position of the jaws is not changed during the adjustment and allows an optimal definition of the law of movement of the jaws. .

  It will be apparent to those skilled in the art that modifications may be made to the methods described above to meet unforeseen requirements within the scope of protection of the following claims.

Claims (2)

In a spinning line combing machine, a method for adjusting the intermittent advancement of a fiber web performed by a supply cylinder (12) located on the nipper (4) and movable by advancement means,
In one configuration of the nippers, a first large diameter having a first diameter (D1), a first number of teeth (Z1) and a first pitch (p1) attached to the supply cylinder (12). The gear (14 ′) has a second pitch (p2) substantially equal to the first pitch (p1) and a second diameter different from the first diameter (D1) of the first large gear (14 ′). Replacing the second large gear (14 '') with (D2);
Engaging the advancing means with the second large gear (14 '') without changing the configuration of the nippers , i.e. without changing the mutual distance between the jaws of the nippers. See
Adjustment method , wherein the lower jaw (6) and the upper jaw (8) of the nipper are placed in a predetermined mutual position only for the first adjustment. In combing machines spinning line, is performed by the supply cylinder (12) located on the nipper (4), a kit for performing the method of adjusting the intermittent advancement of textiles webs,
A plurality of large gears (14 ′, 14 ″, 14) having substantially the same pitch (p1, p2, p3), different diameters (D1, D2, D3), and different numbers of teeth (Z1, Z2, Z3). ''') only contains,
After exchanging the first large gear among the plurality of large gears with the second large gear, the advancing means for moving the supply cylinder does not change the configuration of the nippers, that is, between the jaws of the nippers Without changing the mutual distance of the second large gear,
The kit , wherein the lower jaw (6) and upper jaw (8) of the nipper are placed in a predetermined mutual position only for the first adjustment .

Images