KR101801869B1 - warp-knitting neddle and needlebar - Google Patents

Abstract

(4) at one end of said longitudinal extent and a needle foot (5) at the other end in said longitudinal direction, said operating region (4) and said needle foot (5) 1. A warp knit needle (1) having a needle stand (2) with a mounting portion (6) between a bearing surface (7) extending in the longitudinal extent (3) 7, the warp knit needle having an upper side 10 disposed on the side of the needle stand 2 facing away from the needle stand 5, the needle foot 5 forming the retaining surface 8 is described.
In addition, a needle bar matching the warp knitted needle is described.
It is an object of the present invention to enable the warp knit machine to operate at high operating speeds.
To this end, the retaining surface (8) is provided to be configured in an interval (9) extending from the bearing surface (7) in the direction of the upper side (10).

Description

Warp-knitting neddle and needlebar < RTI ID = 0.0 >

The present invention relates to a machine tool comprising a strand having a longitudinal extent and having a working area at one end of the longitudinal extent and a needle foot at the other end of the longitudinal extent, Wherein the needle portion has a bearing surface extending in the longitudinal extent and an upper surface disposed on one side of the stand facing away from the bearing surface, Thereby forming a surface.

The present invention also relates to a needle bar having a stand having a needle receptacle disposed between the front and rear axes of the stand, wherein the needle receptacles are arranged side by side and separated from each other by a web, Wherein the support surface assembly is disposed on a rear side of the needle receptacle.

This type of warp knit needle and needle bar of this type are known, for example, from DE 44 14 703 C2.

In the manufacture of warp knitted products in warp knit machines, warp knit tools of the same type must be moved in the same manner. Thus, warp knit tools of the same type are placed in the bar. The warp-knit tool is moved together when the bar is moved, so that the same movement is performed by all warp knit tools that are secured to the bar.

To allow the warp knit tool to be placed in the needle bar, the needle receptacle is known to be provided on the needle bar. The needle receptacle has a plurality of slots or grooves into which a warp knit tool is inserted. Here, the warp-knit tool is supported on the wall of the slot by both side walls thereof, in other words, it is supported on the web. The slot is operable in a longitudinal extent of the warp knit tool.

The warp knit tool has a warp knit needle having a hook in such a way that the needle can pull the thread through a route that has been formed with respect to the warp knit needle. The tensile force that must be absorbed by the warp knit needle is created when the thread is pulled. To prevent the warp knitted needle from being placed in the slot or even being extracted from the slot by such tension, the warp knitted needle has a needle foot which forms a retaining surface on its front side towards the mounting surface. The retaining surface is supported on the support surface assembly of the needle bar. In the case of DE 44 14 703 C2 mentioned above, the support surface assembly is configured as a front side of a groove transversely movable with respect to said slot and constituted on the stand of said needle bar.

The stand in the area of the groove is weakened when this type of groove is mounted on the stand of the needle bar. This weakening phenomenon is compensated for in that a corresponding large amount of material is provided in the region of the groove. However, this has the disadvantage that an additional amount of material leads to an increase in the mass of the needle bar. The greater the mass of the needle bar, the greater the force required to cause the needle bar to accelerate or decelerate during operation. Larger masses limit the operating speed of the warp knit machine with the needle bar.

The present invention is based on the object of being able to operate a warp knit machine at high operating speeds.

This object is achieved with the aid of a warp knit needle of the type mentioned as a construction in which the retaining surface is constituted at an interval extending from the bearing surface in the upward direction.

In this case, at least a portion of the retaining surface is received in an area between the upper side of the warp knitted needle and the bearing surface, so that the protrusion of the needle foot over the bearing surface is kept small. The smaller these protrusions are, the smaller the need for the stand of the bar and the grooves required for the associated soft parts. As the softened portion is smaller, the bar becomes more stable and the operating speed achieved by the warp knitting machine becomes higher.

Preferably, the needle foot does not protrude beyond the bearing surface. In this case, no grooves are needed for the stand of the needle bar anymore. Nevertheless, the warp knitted needles are maintained in a suitable manner to withstand tensile forces by such retaining surfaces.

Preferably, the needle foot is terminated by a bearing surface. As a result, the lower side of the nearly linear, continuous warp knit needle is consequently drawn, so that the lower side of the bearing surface and the needle foot are separated from each other only by the spacing. In this way, the maximum retaining surface can be achieved without a groove projecting into the stand of the required needle bar.

In one alternative design embodiment, the needle foot protrudes beyond the bearing surface to a length of up to 1 mm. The warp knit needle is disposed in the needle receptacle on the stand of the needle bar. Grooves or slots into which warp knit needles are inserted are provided in these needle receptacles. The grooves are separated from each other by the web. The web proceeds from a common base having a thickness of 0.5 to 1 mm. The needle foot protrudes beyond the bearing surface in a range of the thickness of the connection portion between the webs.

It is preferable that the interval is extended to a height in the range of 10% to 70% of the total height between the bearing surface and the upper side. The retaining surface of a suitable size to achieve the warp knitted needles to be retained in the needle receptacle is achieved in this manner. The warp knit needle has a relatively small height at the transition between the bearing portion and the needle foot, and the remaining cross-section of the warp knit needle becomes appropriate for the tensile force created by the thread during the absorbed warp knit operation.

It is preferable that the front side which is transferred to the bearing surface by the rounded feature and is oriented toward the working area is formed at the interval. In this way, sharp edges or corners between the front side of the gap and the bearing surface are avoided. The risk of such a sharp edge causing wear on the base of the slot when the warp knit needle is inserted into the needle receptacle or during operation is correspondingly reduced.

The upper side has a rising portion in the region of the gap. In view of this elevation, the cross section of the needle stand extends at such a point so that the warp knitted needle has more resistance to the load.

It is preferable that the height of the cross section of the needle stand in the region of the rising portion is 25% or more of the distance derived from the sum of the height of the cross section and the height of the gap. If the ascent is on the upper side of the needle stand, the gap and retaining surface are slightly enlarged. The relative proportion of the material of the warp knitted needles contributing to the overall height is reduced in the region of the raised portion without reducing the absolute cross-sectional height in an unacceptable manner.

In a preferred embodiment of the design, the protrusion, which is at least partly the lower side projecting forwardly of the upper side, is disposed on one side of the needle foot facing away from the operating area. This protrusion allows easy removal of the warp knit needle from the needle receptacle.

The protrusions are preferably inclined. The projection has one directional element remote from the bearing surface, and the directional element is away from the operating area. Such a structure facilitates handling.

This method is achieved in a needle bar of the type mentioned at the beginning in that the slot base rises towards the rear side of the needle receptacle and is terminated by a slot base elevation on the rear flank on which the support surface assembly is constructed .

When the above-described warp knit needle is inserted into the needle bar, the slot-base elevation portion is inserted at the above-mentioned interval, and the retaining surface can be supported on the rear flank of the slot-base elevation portion, And is supported on the support surface assembly. The warp knitted needle is fixed against tensile loading by thread tension. If the needle foot extends to or shortens the bearing surface, processing of the stand of the needle bar is not required to form a groove. Therefore, the stand is not weakened by the groove. Thus, a thin walled stand having a small mass can be used. The wall thickness in this case is determined only for the operating behavior of the stand without the need to consider fixing the warp knitted needle. The warp knit needle is received in a needle receptacle having the support surface assembly and the slot.

Preferably, one or more warp knitted needles as described above are disposed in the needle receptacle. By fixing the warp knitted needle to the needle receptacle, the warp knitted needle conforms to the needle receptacle, in other words, the slot base riser meets the gap.

The slot-base elevation on the side facing away from the support surface assembly has a curved shape. The simple process of manufacturing slots also exists in the use of side milling cutters. The side milling cutter is guided outside the needle receptacle so that electrons (cutters) reach the end of the slot facing the support surface assembly. The curved shape of the slot base is automatically obtained.

The curved shape preferably follows a circular line of the stand. Such a construction allows for easy manufacture, since a side milling cutter or similar tool is guided along the buckle-free track.

The support surface assembly preferably forms the front side of the groove and the rear side thereof forms a thrust surface and the thrust surface is higher than the support surface assembly. The thrust face in this case acts against the displacement of the warp knitted needle in the needle receptacle in the opposite direction to the tensile direction. The warp knit needle of the needle receptacle is secured against movement in all directions in a simple manner.

BRIEF DESCRIPTION OF THE DRAWINGS The invention is illustrated below by way of example embodiments illustrated with reference to the drawings.
1 is a detailed view of a warp knitted needle.
2 is a cross-sectional view of a portion of the needle bar.
Figure 3 is a detailed view of a modified warp knit needle.
4 is a detailed view of the modified needle foot.

Figure 1 shows a warp knit needle 1 with a needle stand 2 extending in the longitudinal direction 3, indicated in double arrows, in a simple manner. At one end in the longitudinal direction 3 the warp knit needle 1 has an operating region 4 and has a needle foot 5 at the other end in the longitudinal direction 3. The mounting portion 6 is disposed between the operating region 4 and the needle foot 5. The mounting portion has a bearing surface (7). In the direction of the warp knitted needle 1 shown in Fig. 1, the bearing surface 7 forms a lower side. The terms "lower side" and "upper side" described below are for the illustration of the drawings and are for the sake of simplicity. The warp knitted needles 1 may be employed to have different spatial orientations.

The needle foot (5) on the side facing the mounting portion has a retaining surface (8). The retaining surface 8 is formed with a gap 9 extending from the bearing surface 7 to an upper side 10 disposed opposite the needle stand 2. The overall height 11 is formed by separating between the bearing surface 7 and the top side 10. The warp knitted needle 1 is tapered toward the operating region 4. [

In the region of maximum height, the gap 9 extends to a height of 10% to 70% of the total height 11 between the bearing surface 7 and the top side 10. The region 12 thus remains between the operating region 4 and the needle foot 5, where the entire height 11 has a height above 30%.

The needle foot (5) on its side facing away from said gap (9) has a support surface (13) as described below.

The needle foot also has a projection 14, the lower side 15 of which projects at least partially beyond the upper side 10. The protrusions 14 have one directional element which is parallel to the longitudinal extent 3. Further, the projecting portion 14 has one directional element aligned with the entire height 11. The protrusion 14 facilitates the posterior removal of the warp knit needles from the needle receptacle.

The clearance 9 has a front side 16 which is oriented towards the operating area 4 and which is transferred to the bearing surface 7 by a rounded feature 17. It becomes possible to avoid an edge which will cause damage to the needle receptacle during a subsequent operation or when the warp knitted needle 1 is inserted into the needle receptacle.

However, the front side 16 of the gap 9 is curved so that the electrons follow the circular line of the needle, and the circular line has a radius R1. The front side 16 of the gap 9 may have a different formation. 3, the front side 16 may have a straight line shape.

The needle foot (5) is terminated with its bearing surface (7) aligned in height, in other words, the needle foot does not extend from the bearing surface (7). Instead, the lower side 18 and the bearing surface 7 of the needle foot 5 lie on one line 19.

However, the needle foot 5 protrudes slightly above the bearing surface 7 as described below. However, the projections beyond the bearing surface 7 and the line 19 are very small. The protrusion is in any case at most 1 mm level. It may be smaller.

As shown in FIG. 1, the upper side 10 of the region of the gap 9 is provided with a rising portion 40. The raised portion 40 is shown as a circular line. The raised portion 40 follows a straight line extending in parallel to the bearing surface 7. This type of lifting portion 40 compensates for the missing material in consideration of the gap 9 and increases the resistance against the load of the warp knitted needle 1 again.

The remaining cross sectional height 12 of the warp knitted needle 1 is 25% of the distance derived from the sum of the height of the remaining cross sectional height 12 and the spacing 9 .

Fig. 2 shows a combined needle bar 20 having a bar stand formed, for example, of a carbon fiber-reinforced plastic material. The needle receptacle 22 is secured, for example, to a bar stand 21 which is glued thereto. The needle receptacles are provided with slots (23) arranged to be parallel to each other and separated from each other by a web. Only one slot 23 is shown in Fig. However, it is contiguously arranged in such a manner that a plurality of slots are perpendicular to the plane of the drawing.

The bar stand 21 has a front side 25 and a rear side 26. Further, the terms "front side" and "rear side" The needle bar 20 has a different spatial orientation during operation. The front side 25 is the side where the operating area 4 of the warp knitted needle 1 is positioned when the warp knitted needle 1 is inserted into the needle receptacle 22.

Each slot 23 has a slot base 27 that rises toward the rear side 26 of the bar stand 21 and rises toward the rear side of the needle receptacle 22, Section 28 and is terminated at the riser. The slot-base elevation 28 has a rear flank in which the support surface assembly 29 is constructed.

The slot base 27 is tightly spaced from the bar stand 21 because the needle receptacle 22 has a continuous "bottom ". The projection of the needle foot 5 beyond the bearing surface 7 is equal to the thickness of the bottom of the needle receptacle 22 without the need of machining the bar stand 21.

The slot-base elevation 28 on the side facing away from the support surface assembly 29 has a curved shape along the circular line of the stand in this exemplary embodiment. The circular line of the stand has a radius R2. The radius R2 of the circular line of the stand is larger than the radius R1 of the circular line of the needle. If the warp knit needle as the front side 16 has a different shape without having a circular line of needles, the only requirement is that of the slot-base riser 28 fastened to the gap 9.

The support surface assembly 29 forms the front side of the groove 31. The rear side of the groove 31 forms a thrust face 32. The thruster surface 32 has a height greater than the support surface assembly 29.

The warp knitted needle 1 shown in Fig. 1 is inserted into the needle receptacle 22 of the needle bar 20 as shown in Fig. The slot-base lifting portion 28 enters the gap 9 of the warp knitted needle 1. Due to this construction, the retaining surface 8 is supported on the support surface assembly 29 and the support surface 13 is supported on the thrust surface 32. In this way, the warp knitted needle 1 is firmly fixed in the longitudinal direction.

However, such a rigid fixing structure is exclusively performed on the needle receptacle 22, in other words, no comparative structure or groove for softening the bar stand is required to be provided on the bar stand 21.

Since the radius R2 of the circular line on the stand on the side surface 30 is larger than the radius R1 on the front side 30 of the gap 9, the warp knitted needle 1 has the slot- Lt; RTI ID = 0.0 > 28 < / RTI > With this structure, the support surface assembly 29 has a height that is less than the range of the spacing 9 of the areas of the retaining surface 8.

The tensile force acting on the warp knitted needle 1 is formed during operation of a warp knit machine with this type of warp knitted needle 1. Even in the case of the region 12 having a relatively small range, it is nevertheless able to absorb this tensile force.

The needle receptacle 22 is formed of a plastic material having no reinforcing fibers formed of carbon. The slot 23 is formed, for example, by a side milling cutter in which the rear side of the needle receptacle 22 is moved outwardly from the needle receptacle during approach, so that the curved shape of the side 30 has a relatively high level Without being complicated. The needle receptacle is integrally formed. The thrust surface 32 is formed on the end protrusion 3 connected to the receptacle area of the needle receptacle 22 via the connecting web 34. The receptacle area contains a slot (23). The connecting web 34 forms the base of the groove 31.

1: Needle 2: Needle stand
3: longitudinal range 4: operating range
5: Needle foot 6: Mounting part
7: Bearing surface 8: Retaining surface
9: Interval 10: Top side

Claims (15)

(3) and having an operating region (4) at one end of the longitudinal extent (3) and a needle foot (5) at the other end of the longitudinal extent (3) 4) and the needle foot (5), the needle stand (2) having a mounting portion (6)
The mounting portion 6 includes a bearing surface 7 extending in the longitudinal extent 3 and an upper surface 10 disposed on the side of the needle stand 2 facing away from the bearing surface 7 , The needle foot (5) forming a retaining surface (8)
Characterized in that the retaining surface (8) comprises an interval (9) extending from the bearing surface (7) in the direction of the upper side (10)
The upper side 10 has a raised portion 40 in the region of the gap 9,
Characterized in that the needle foot (5) does not protrude over the bearing surface (7). delete The method according to claim 1,
Characterized in that said needle foot (5) is terminated by said bearing surface (7). delete The method according to claim 1,
Characterized in that said clearance (9) extends to a height in the range of 10% to 70% of the total height (11) between said bearing surface (7) and said top surface (10). The method according to claim 1,
Characterized in that said gap (9) has a front side (16) which is oriented towards said operating area (4) and which is transferred to said bearing surface (7) by a rounded feature (17) One). delete The method according to claim 1,
Sectional height 12 of the needle stand 2 in the area of the rising part 40 is not less than 25% of the distance derived from the sum of the height of the sectional height 12 and the height of the gap 9. [ Needle knit needles (1). The method according to claim 1,
Characterized in that a protrusion (14), which is a lower side (15) at least partially standing on said upper side (10), is provided on the side of the needle foot (5) in a direction away from said operating area (4) Needle (1). 10. The method of claim 9,
Wherein the projecting portion (14) is inclined. A needle bar (20) having a bar stand (21) having a needle receptacle (22) disposed between a front side (25) and a rear side (26) of a bar stand (21)
The needle receptacle 22 has slots 23 that are arranged to be parallel to each other and separated from each other by a web 24 and each having a slot base 27, The assembly 29 is provided on the rear side of the needle receptacle 22,
Characterized in that the slot base (27) is protruded toward the rear side of the needle receptacle (22) and is terminated by a slot-base elevation portion (28) on the rear flank on which the support surface assembly (29) The bar (20). 12. The method of claim 11,
One or more warp knitted needles (1) are disposed on the needle receptacle (22)
Characterized in that each of said warp knit needles (1) has a longitudinal extent (3) and an operating area (4) at one end of said longitudinal extent (3) (2) having an operating region (5) and a mounting portion (6) between the operating region (4) and the needle foot (5)
The mounting portion 6 includes a bearing surface 7 extending in the longitudinal extent 3 and an upper surface 10 disposed on the side of the needle stand 2 facing away from the bearing surface 7 , The needle foot (5) forming a retaining surface (8)
Characterized in that the retaining surface (8) comprises an interval (9) extending from the bearing surface (7) in the direction of the upper side (10)
Characterized in that the upper side (10) comprises a raised portion (40) in the region of the gap (9). 13. The method of claim 12,
Wherein the slot-base elevation (28) on a side facing away from the support surface assembly (29) comprises a curved configuration (30). 14. The method of claim 13,
Characterized in that said curved features (30) follow the curved surface of said needle stand (2). 13. The method according to claim 11 or 12,
The support surface assembly 29 defines a front side of the groove 31 and a rear side thereof defines a thrust surface 32 which is higher in height than the support surface assembly 29 (20).

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