KR100897544B1 - Rapier band of integrated structure and preparation method thereof - Google Patents

Abstract

The present invention relates to a repetition band using a band-shaped heavy tissue fabric as a reinforcing material, and is produced by pultrusion molding a repetitive band preform woven into a heavy tissue through a resin impregnation and curing process, One or more warp yarns have a construction of a solid tissue fabric having an integral three-dimensional multi-layer structure that includes a seam that engages the weft of a neighboring top or bottom layer.

Description

RAPIER BAND OF INTEGRATED STRUCTURE AND PREPARATION METHOD THEREOF}

1 is a structural diagram of a two-dimensional laminated fabric used as a preform of a conventional rapier band

Figure 2 is a structural diagram of a three-dimensional heavy tissue fabric used as a preform of the rapier band of the present invention

3 is a schematic diagram of a drawing apparatus capable of molding the preform of the rapier band of the present invention in a continuous and automated process;

4 is a perspective view of a mold used in the drawing molding of the present invention

5 is a state diagram of use of the rapier band of the heavy tissue of the present invention

6 is a perspective view of the heavy tissue reappearance band of the present invention

Explanation of symbols of drawing

1-14: slope

15, 16: reinforcement

① to ⑮: weft

The present invention relates to a repetition band for assembling a reciprocating head to supply the weft to the warp in the repier loom.

The rapier band is a consumable that is used to enter the rapier loom. As the rapier loom becomes faster, the rapier band physical properties are required to be improved. In addition, continuous research has been carried out to speed up the rapier loom like the air jet loom, and the speed of 20 rpm is increasing every year. In order to speed up the repier loom, the parts of the loom must be improved in quality, and in particular, the physical properties such as fatigue life of the repier band, which is the core part of the repier loom, must be accompanied.

1 shows a structure of a two-dimensional laminated fabric 20 used as a preform of a conventional rapier band. The conventional rapier band is produced only in a straight form because the fiber-reinforced fabric is manufactured by using two-dimensional lamination and impregnation with a resin by using a high-temperature press or autoclave of a flat surface. This leads to delamination. Therefore, the life of the band during the bending behavior of the piercing band subjected to excessive cyclic load is only about 1 month, although it varies depending on the type of weft and the speed of the loom.

In addition, the conventional rapier band is manually laminated the polyester fabric 22 and the carbon fiber 24 or carbon fiber fabric, and hardened them by a high-temperature press, and then finished through cutting and drilling operations to the manufacturing process Manpower consumption was inevitably high.

An object of the present invention is to solve the above problems, to provide a repetitive band having a fatigue life is more than two times stronger than the conventional repetitive band formed in two dimensions and improved tensile strength.

Another object of the present invention is to continuously produce the homogenized repetitive band while minimizing the consumption of manpower by eliminating the manual work for the lamination of the existing two-dimensional fabric by drawing the preform continuously to produce the repetitive band To provide a way.

The present invention, in order to achieve the above technical problem, having a three-dimensional (integrated) multi-layer structure in which the inclination made of a multilayer is laminated so as not to be separated between the layers having a junction between the weft of the neighboring upper layer or lower layer interlayer. There is provided a rapier band comprising a fabric.

In addition to the warp and weft of the present invention provides a rapier band further comprising a reinforcing yarn.

The inclination of the multilayer of the rapier band of the present invention may include fibers that are single or layered, and the fibers used in the present invention are selected from polyester fibers, carbon fibers, nylon fibers, aramid fibers and the like. Preferably the slopes of the neighboring layers each comprise polyester fibers and carbon fibers.

As described above, the rapier band of the present invention is obtained by weaving a repreparative band preform having a three-dimensional layered structure by inclining a single layer to the weft of the upper layer or the lower layer as described above, and drawing the preform through a resin impregnation and curing process. It is manufactured by pultrusion. The rapier band of the present invention can be pulled out in a continuous and automated process, and also has the advantage of improving the production speed while minimizing the consumption of manpower by eliminating the manual work for conventional two-dimensional fabric lamination.

In addition, the rapier band of the present invention can be woven into a curved surface having a curvature of 1/2 of the curvature of the driving wheel by varying the feeding and winding of the three-dimensional preform weaving according to the inclined layer.

In addition, the shape of the mold used in the drawing process is also a curve having a curvature of half the curvature of the driving wheel, so that the fatigue life for the repeated bending load of the produced rapier band is increased more than twice. do.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

The preform of the rapier band of the present invention has an integrated laminate structure as shown in FIG. 2. The preform of the rapier band of the present invention is not a conventional simple stacking method of flat fabric, but the first warp yarn 3 is joined to the weft of the neighboring top layer and the second warp yarn 9 is the weft yarn of the lower layer. It consists of a heavy tissue fabric which is joined to iii). The lair band of the present invention forms a three-dimensional band-shaped lamination structure by lamination between laminations, thereby preventing interlayer separation and extending fatigue life of the lair band. In addition, the rapier band of the present invention can minimize the density of the weft due to the characteristics of the three-dimensional structure, and the tensile strength in the longitudinal direction is improved because the inclined density in the longitudinal direction can be increased more than the conventional two-dimensional rapier band. Has the advantage of being. In addition, the rapier band of the present invention may further increase tensile strength by further including reinforcing yarns 15 and 16.

3 is a schematic diagram of a pultrusion apparatus 30 capable of shaping the preform 50 of the rapier band of the present invention in a continuous and automated process. The apparatus for drawing out the repetition band 30 includes a resin impregnation tank 31 for impregnating a resin band preform 50 to a resin, and a resin impregnation tank 31 for a repetition band preform 50 impregnated with a resin. Resin controller 32, which is taken out at an appropriate speed and moved to the preformer 34, a preformer 34 which preforms the rapier band drawn by the resin controller 32, and the preformer. It consists of a heated mold (35) for curing and shaping so that the prepared rapier band has a curved shape, and a drawer (36) for drawing the rapier band (52) passing through the mold (35). Reference numeral 33 denotes jigs that allow the rapier band to rotate at an angle to enter the preform 34. FIG. 4 is a perspective view of a mold 35 used in the drawing apparatus 30, wherein the mold 35 has a curvature of 1/2 of the curvature of the driving wheel 40 of the repier loom shown in FIG. Characterized in that having a curved (L) form having a.

5 is a state diagram of the use of the reappearance band 52 of the present invention, Figure 6 is a perspective view of the heavy tissue reappearance band of the present invention. As shown in FIG. 5 and FIG. 6, the rapier band 52 according to the present invention is a three-dimensional heavy tissue structure and is repeatedly repeated at a high speed deceleration and bending motion in a bent state with a constant curvature radius. In addition, the fatigue life due to the repeated tension, compression, and bending loads due to the reciprocating motion is increased compared to the conventional rapier band. In FIG. 5, reference numeral 54 denotes a hole drilled so that the teeth 42 of the driving wheel 40 are inserted during the reciprocating motion, and reference numeral 56 denotes a repair head.

In order to compare the properties of the existing and the newly designed repetitive band, the specimens were fabricated as follows to compare the tensile properties and the fatigue life.

Comparative Example: Conventional Rapier Band Fabrication

Polyester 440 denier fibers were woven at a warp density of 20 pieces / cm and a weft density of 15 pieces / cm. The woven fabric was laminated in 8 layers and cured at 80 ° C. for 30 minutes at 120 ° C. for 1 hour using a vinyl ester resin, and the temperature rising rate was 2 ° C./min.

Example: Preparation of the rapier band of the present invention

The rapier band preform of the present invention was produced with a narrow loom with the same fiber and theodolite density as in the comparative example. The rapier band preform of the present invention was molded with a drawing machine, and a mold having a thickness of 2.3 mm and a width of 23 mm and a length of 1200 mm was used.                     

Curing was carried out at a drawing speed of 10 cm / min, and the time to stay in the mold was 12 minutes, at which time the temperature of the mold was 140 ° C.

Tensile strength test

The static physical properties of the rape band of the present invention were compared with conventional rape bands using the ASTM D2343-67 method. At this time, tabs were attached to both parts of the specimen by ASTM D3039-3076 in order to prevent fracture at the gripping portion. Tensile strengths of the conventional and the Rapier band specimens prepared in Comparative Example and Example 1 were tested with an Instron with a cross head speed of 5 mm / min and a gripping distance of 100 mm.

TABLE 1

The tensile strength of the rapier band of the present invention is improved by about 19.9% compared to the conventional rapier band.

Fatigue Life Test

The fatigue life of the conventional and bandier bands of the present invention was measured by the ASTM D3479-76 method. At this time, the repeated load was 3 Hz and the stress rate R was tested at 35 MPa (0.1 of the cutting load of the repetitive band of the present invention).                     

TABLE 2

The fatigue life of the rapier band of the present invention was increased by 241% over the conventional rapier band.

The present invention manufactures a three-dimensional lamination band preform, and it is molded by the resin impregnation and curing process to provide a fatigue band more than twice as strong as a conventional band band, the attraction force It provides a process for manufacturing a rare band that can continuously produce a homogenized rare band while minimizing the consumption of In addition, the shape of the mold used in the hardening of the rapier band by the drawing molding method is designed to be curvilinear to minimize the bending load for the repeated bending behavior of the rapier band, thereby improving the life of the rapier band. Can be improved.

Claims (9)

A heavy tissue fabric having an integral three-dimensional multi-layered structure comprising a junction where at least one warp engages the weft of a neighboring top or bottom layer, A curved rapier band having a curvature of half the curvature of a rapier loom driving wheel. The method of claim 1, A rapier band further comprising a reinforcement yarn. The method of claim 1, A rapier band in which the warp is selected from the group consisting of polyester fibers, carbon fibers, nylon fibers and aramid fibers The method of claim 3, Adjacent rapier bands with different fiber slopes. The method of claim 4, wherein Said different fibers are polyester fibers and carbon fibers. delete Weaving a rare band preform of a heavy tissue fabric having an integral three-dimensional multi-layer structure comprising a junction where at least one warp engages a weft of a neighboring top or bottom layer; And Pultrusion through a process of resin impregnating and curing the rare band preform, The mold of the drawing step comprises a curved surface having a curvature having a curvature of 1/2 of the curvature of the rapier loom driving wheel. delete delete

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