KR100287503B1 - Reducing diameter center consisting of injection molded plastics for the formation of spools of yarn for dyeing and other processing - Google Patents

Abstract

The cylindrical wall of the center according to the invention has a row of long slots so that the cross section of the center can be reduced; At each end portion 51A of the perforated cylindrical portion 51, an annular region 55 consisting of recesses 59A and 61 is formed, so that the centered perforated cylindrical wall including the annular region 55 is formed. The cross section of 51 is reduced uniformly.

Description

Reducing diameter center made of injection molded plastics for the formation of spools of yarn for dyeing and other processing

Prior Intellectual Property Document by Applicant (Utility Model Application FI / 92 / U / 102 of the Republic of Italy (August 28, 1992), European Patent Application No. 93830308.8 Publication No. 0587538 (July 20, 1993) ) And U.S. Patent No. 5,435,497 (August 23, 1993), issued July 25, 1995, the specification of which is suitable for winding yarns and unwinding yarns sequentially during processing, in particular during dyeing. A center consisting of an injection molded plastic for forming a spool of yarn is disclosed. The cylindrical wall of this center is formed with rows of long slots and slots of certain rows are staggered with respect to the slots of adjacent rows so that the longitudinal edges of each slot are accessible from each other at the center. When the spun yarn is contracted as a result of the treatment applied to the spun yarn spool, the reduction of its cross section can be substantially constant if the centripetal pressure is imparted to the cylindrical wall of the center by the turns of the spun yarn. The rows of slots may be vertical or slightly spiral.

Also, with reference to the drawings illustrating the prior art and non-limiting embodiments of the invention, the following description will be more clearly understood.

1, 2 and 6 show a part of the center 101 of the prior art, which comprises a step 103 in which the relative end of the same center is positioned to be axially mounted on top of the center 101. (BB) indicates the spools of the yarns gathered on the center 101 in the area to be described. When the necessary processing (dyeing and / or other treatment by heat and moisture) is performed on the center 101 having the spool BB of the yarn, the yarn of the spool BB contracts and the multi-row slot 107 is closed. A very high centripetal pressure is imparted on the containing cylindrical wall 105, and the strength of the thermoplastic material of the center 101 is weakened by the high temperature as a whole. In this state, the center is deformed by the diameter reduction of the wall 105 as shown in Figs. 2 and 6, and the area of step 103 is not deformed; Between the deformed wall 105 and the region of step 103 is formed an inclined intermediate region 109 which is relatively very wide in the axial direction and is almost truncated. The end portion B1B1 in the spool BB thus comprises a turn of the yarn of the yarn in a state different from the other parts of the spool (see FIGS. 2 and 6), in which the yarns in this part B1B1 Because of the shrinkage of 105 and the reduction in the diameter of the wall, no advantage can be gained, so that the spinn yarn of the yarn in the portion B1B1 in Figs. 2 and 6 is in a larger tension and the remainder of the spool It is more taut than the spinning yarn. Therefore, the yarn in the part B1B1 changes its physical properties due to the other tensile forces it receives, compared to the yarn in the remainder of the spool, and is due to the greater tension, ie greater tightness of the turn in the part B1B1. The dyeing difference is shown due to the low permeability of the dye.

When these yarns are used in the manufacture of textiles, the difference in dyeing differences and physical properties may be due to the formation of transverse bands in which the color is somewhat different from the remainder of the fabric and / or in the form of transverse bands, which are somewhat different in shape, such as wrinkles or wrinkles. It creates unacceptable nonuniformities in the fabric.

The present invention provides a center of the kind described above, but it is possible to solve the above problems and obtain other objects and advantages which will become apparent from the following description.

1 and 2 show part of a prior art center before and after treatment (dyeing, etc.) of a spool of yarn.

3, 4 and 5 are an external view of a part of the center according to the invention and cross-sectional views according to IV-IV and V-V of FIG.

6 and 7 are partial cross-sectional views for comparing the state of the deformed center when fabricated according to the invention with the deformed center of the prior art.

8 shows a part of the deformed center of FIG. 7 in the absence of a spool of yarn;

9 and 10 are an external and partial cross-sectional view of the center according to the present invention in its original state and deformed by contraction.

(Explanation of symbols for the main parts of the drawing)

51: cylindrical wall 55: annular region

59: rib 53: slot

61, 62: recess 75: profile

According to the present invention, an annular region consisting of a recess and a rib is formed at both ends or one end of the perforated cylindrical wall, and the thickness of the center and the perforated cylindrical wall including the annular region where the end tunnel of the spool is located. The cross section of is reduced uniformly.

Indeed, there is an annular area of reduced thickness adjacent to the stepped portion present at one end of the center and adjacent to this shaped portion where the "; reserve amount"; And recesses and recesses in a first row between the regions; A recess of different rows is formed between the slotted cylindrical wall and the region, and these shapes are reduced by reducing the cross section of the cylindrical wall of the center even near the above-described shape (i.e., the shape for accumulating the reserve amount and the reserve amount). As a result, the yarns can be treated to prevent the state difference between the yarns of the yarns of the spools wound on the centers when the center cross section is reduced.

The recesses in the first row can be aligned with the recesses in the second row. Also, the recesses in the two rows can be aligned with the slots and the gaps between the slots in the cylindrical wall can be aligned with each other, so that the pitch between the recesses is one half of the pitch between the rows of slots. It is supposed to be.

As described in prior intellectual property documents (Italian Application No. FI / 95 / A / 110 (May 19, 1995); European Patent Application No. 96830237.2 (April 29, 1996), The opposite end of the center from the forming end is shaped to have a shape similar to the end formed above, and to hold the end of the yarn as "a reserve amount" having a thin and flat area ruptured by the spinning yarn being fixed.

As shown in FIGS. 3 to 5 and 7 to 10, the center has a relatively large thickness cylindrical wall comprising slots 53 (equivalent or similar to slot 107) arranged in longitudinal direction. Consisting of; The rows of slots are staggered with respect to the slots in adjacent rows; This configuration can also be modified in that the rows of slots can travel in spirals with very coarse pitch, as described in already known literature; The slot 53 can reduce the circular portion of the cylindrical wall 51 when the spool B wound around the center (FIG. 7) is subjected to shrinkage of the yarn and thus to tighten the turn of the spool B. FIG. Specially designed to; The cylindrical wall 51 is easy to decrease in diameter due to the ability of the slot 53 to reduce the transverse size (as can be seen in FIG. 2), and thus the diameter of the cylindrical wall 51 is easily reduced. .

In order to avoid the above-mentioned problem, at the upper end of the center, i.e., in the vicinity of the end 51A, which includes a step 52 capable of setting another center, the cylindrical wall 51 is formed in an annular area having a reduced thickness ( 55), and the reduction in thickness occurs outside of the cylindrical wall 51. The spool B is wound so that the upper surface BX of the spool (which corresponds to the surface B1B1 of the wound spool in the conventional configuration shown in FIG. 2) is located approximately in the middle of the region 55 of reduced thickness. All. On the outside, the area 55 represents a rib 59 and a recess 59A between the ribs, which ribs 59 have a small diameter area 55 from the outer surface 57 of the cylindrical wall 51. Tilted to the outer surface of the In line with the recess 59A, there are recesses 61 and 62 of approximately triangular shape in the region 55 of reduced thickness; The recesses 61 terminate in the slots 53, while the recesses 62 are in line with the solid regions between the two rows of slots 53, and the regions between these slots 53 at 62A. Stretches into; The recesses 61, 62 abut the sides of a portion of the material 65, which constitutes a rib equivalent to the rib 59, and also has a reduced thickness area 55 and cylinder. It extends between the outer surfaces 57 of the walls 51.

As described above, the bottom end 51B also has a rib 159 and a recess 159A and a reduced thickness annular region 155 with recesses 161, 162 and ribs 165. Doing.

The ribs 59, 65 (and corresponding ribs 159, 165) thus formed are of reduced thickness including the landmark surface BX of the spool B formed by the spinner's turn at the center. Is actually terminated at an intermediate position of region 55 (and 155). The consequences of this configuration are fundamental to preventing the formation of external regions such as B1B1-formed above with reference to the conventional configuration of the currently known centers (FIGS. 1, 2 and 6), and thus to the center 51 of the present invention. The turns of the formed spool B are all identical in that they are physically tensioned when the spool B is subjected to dyeing and other treatments which cause the yarn to shrink, thus deforming the center wall. In the arrangement according to the invention, the areas 55 and 155 of reduced thickness deform evenly as shown in FIGS. 7 and 10 when compared to the state of the center and spools shown in FIGS. 1, 2 and 6. . The deformation actually occurs as shown in the cross-sectional views of FIGS. 7 and 8, and as a result, the reduction in the diameter of the cylindrical wall 51 is actually the end BX of the spool B, as shown in FIGS. 7 and 10. Expands from).

By the presence of the ribs 59, 65, the deformation of the small-thickness region 55 of the cylindrical wall 51 takes place basically uniformly without deforming asymmetrically, while the recesses 59A, ( 62 and 62A allow the region 55 to deform to a substantially reduced state of diameter corresponding to the reduction occurring in the cylindrical wall 51. As a result, the cross section of the center, and thus the shape of the spool, is kept substantially constant as necessary when the diameter decreases from the top to the bottom of the spool.

At the lower end portion 51B of the spool B, it is preferable to form a row of recesses 71 that accumulate " reserve amount " The bottom rim (BZ) of the center may include a configuration having a portion (profile) 75 (FIGS. 9 and 10) that secures the end of the yarn of the spool by rupturing a very thin portion 75A of the material of the center. This is divided by the yarn that is pushed into the entrance 75B in the configuration already described in the preceding intellectual property document mentioned earlier in this description.

According to the present invention, both ends or one side of the perforated cylindrical wall are formed with an annular area composed of concave and ribs, thereby uniformly reducing the thickness of the center and the cross section of the perforated cylindrical wall, thereby treating the yarns. When the cross section is reduced, it is possible to prevent the state difference between the spinning yarns of the spool wound on the center.

The drawings show only one embodiment as a practical example of the present invention, and the present invention can be changed in form and arrangement without departing from the scope of the concept. Reference numerals in the appended claims are provided to aid the understanding of the claims by referring to the detailed description and the drawings, and do not limit the scope of protection described in the claims.

Claims (5)

A center consisting of injection molded plastic for forming a spool of yarn wrapped around it for treatment, in particular for dyeing, and then unwinding the yarn, the cylindrical wall 51 of which has rows of long slots, The slots in one row are staggered with respect to the slots in adjacent rows so that when the yarns shrink as a result of the heat treatment applied to the yarnspool, the centripetal pressure is applied to the cylindrical wall of the center by the rolled yarns of the centers. In the center where the edges of each slot are in contact with each other in the middle so that the cross section can be reduced substantially uniformly, the recesses 59A, 61, 62 and 159A at each end of the perforated cylindrical wall 51. , 161, 162 and ribs 59, 65; 159, 165 having a reduced thickness annular region 55, 155 formed therein to form a perforated center of the center including the reduced thickness annular region. A center of reducible diameter consisting of injection molded plastic for the formation of a spool of yarn for dyeing or other processing, characterized in that the cross section of the cylindrical wall 51 is adapted to be uniformly reduced. Center as claimed in claim 1, characterized in that the recesses (59; 159A) are aligned in line with the opposing recesses (61,63; 161,162). The center according to claim 1 or 2, wherein the recesses (59A, 61, 62; 159A, 161, 162) of both rings are aligned in line with the slot and the gap between the slots. The center according to claim 1, wherein the opposite end (1B) of the center from the end forming the step (52) comprises a profile (75) for holding the end of the yarn. Everything described and illustrated; Reducing diameter center made of injection molded plastic, for spools of yarn for dyeing or other processing.