Tool module for textile machines

Abstract

The invention relates to a tool module (10) having a module body (11), which has a contact surface (21) and an orienting structure (22). A fastening opening (29) and additionally at least one, preferably a plurality of additional openings (33, 34) extend through the contact surface (21). The area of one additional opening (33) or (34) is larger than, preferably considerably larger than, for example at least twice or three times as large as the cross-sectional area of the fastening opening (29). Thus, a module body (11) is provided, by means of which an increased operating speed of the textile machine can be achieved.

Claims

1. A tool module (10), particularly for tufting applications, comprising: a module body (11) that comprises an alignment structure (22) including an abutment surface (21) for positioning at a bar, tools (12-18) held in the module body (11), a fastening opening (29) that penetrates the abutment surface (21) and the module body (11), at least one additional opening (33, 34) that penetrates the abutment surface (21) and the module body (11) that is separate from the fastening opening (19), wherein the at least one additional opening (33, 34) of the module body (11) is arranged in a zone between the fastening opening (29) and a ridge (26) arranged adjacent to a narrow side (20) of the module body (11) and serves as an alignment structure (22), and wherein the module body (11) is separated into a fastening section (31) and a tool holding section (32) by the at least one additional opening (33, 34), wherein the fastening section (31) and the tool holding section (32) are connected with each other via at least two webs (33, 38, 39).

2. The tool module according to claim 1, wherein the abutment surface (21) has a flat configuration.

3. The tool module according to claim 1, wherein the alignment structure (22) comprises projections (23, 24) extending away from the abutment surface (21).

4. The tool module according to claim 3, wherein the projections (23, 24) include two prismatic, cylinder-shaped or dome-shaped projections (23, 24) that extend parallel to each other away from the abutment surface (21).

5. The tool module according to claim 1, wherein the ridge is an interrupted or continuous ridge (26) and is part of the alignment structure (22) adjoining a narrow surface (20) of the module body (11) and extending beyond the abutment surface (21).

6. The tool module according to claim 4, wherein the projections (23, 24) are arranged on a reference line (28) that is oriented parallel to the ridge (26).

7. The tool module according to claim 6, wherein the fastening opening (29) is arranged on the reference line (28).

8. The tool module according to claim 1, wherein the fastening opening (29) is configured in an insert (30) provided with an inner thread.

9. The tool module according to claim 1, wherein the at least one additional opening comprises two openings (33, 34) that are separate from the fastening opening (29).

10. The tool module according to claim 9, wherein the two openings (33, 34) are configured mirror symmetrically to each other.

11. The tool module according to claim 6, wherein the at least one additional opening comprises two openings (33, 34) arranged on a second reference line that is parallel to the reference line (28) on which the projections (23, 24) are arranged.

12. The tool module according to claim 1, wherein the at least two webs (37, 38, 39) comprise equal cross-sections.

13. The tool module according to claim 1, wherein the module body (11) is a molded part.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further details of advantageous embodiments of the invention are subject of the drawings, the description and the claims. The drawings illustrate an embodiment of the invention. The drawings show:

(2) FIG. 1 the inventive tool module in a schematic perspective illustration with view on the contact surface,

(3) FIG. 2 the tool module according to FIG. 1 in a perspective illustration with view on its side facing away from the contact surface,

(4) FIG. 3 the tool module according to FIGS. 1 and 2 in a top view on the fastening side,

(5) FIG. 4 the tool module according to FIGS. 1-3 in a side view,

(6) FIG. 5 the tool module according to FIGS. 1-4 in top view on its contact surface,

(7) FIG. 6 the tool module according to FIGS. 1-5 with view on the points of the tools.

DETAILED DESCRIPTION

(8) In FIG. 1, only for exemplary illustration of features of the invention, a tool module 10 is illustrated including a module body 11 and tools 12-18 held at the latter. Tufting needles are exemplarily illustrated as tools. But similarly other tools that operate parallel to each other synchronously as, for example, guide needles, grippers, fingers, knives or the like can be provided. Independent therefrom, the tools 12-18 are arranged parallel to each other and are fixed with its respective shank end in the module body 12. As an example, 7 tools are illustrated. However, tools in any other desired number and also singular tools can be provided at the module body 11.

(9) The module body 11 is preferably formed of metal, particularly a zinc alloy, a zinc aluminum alloy or another metal alloy melting at a temperature below 1.000 C. Particularly, the module body 11 can be formed as die-cast body.

(10) The module body 11 hast substantially the form of a flat plate with a narrow side 20, at least one tool, here the tools 12-18, extending away therefrom. Additionally, the module body 11 comprises a substantially flat contact surface 21 that is in contact with a bar for accommodating and positioning the tools 12-18. At the opposite side of the module body 11 a substantially flat or also with additional structures provided backside is formed, that is substantially orientated parallel to the contact surface 21.

(11) Particularly at the contact surface 21 as well as the transition to the narrow side 20 elements are provided that form an alignment structure 22 or that are part thereof. For example two cylinder-shaped projections 23, 24 are part of these elements that preferably extend parallel to each other away from the contact surface 21. The ends of the projection 23, 24 can be provided with an insertion chamfer, a rounded camber or the like. Alternatively, the projections 23, 24 can have a cross-sectional shape deviating from the circular shape as, for example, polygonal shapes or can be configured as rounded domes.

(12) A ridge 26 provided with an interruption 25 can additionally or alternatively form part of the alignment structure 22 that is arranged between the narrow side 20 and the contact surface 21. The ridge 26 can be separated from the contact surface 20 by a groove 27for this purpose reference is made particular to FIG. 4. The ridge 26 comprises preferably a support surface 21a orientated at a right angle with regard to the contact surface 21. In the assembled condition both contact surfaces 21, 21a are in contact with a bar. Preferably the cutout 25 is located with its bottom substantially in one plane with the contact surface 21. The remaining sections of the ridge 26 on both sides of the cutout 25 form teeth that come into contact with respective contact surfaces of a bar and thus define the axial position of the tools 12-18. The contact surface 21 however defines their lateral positioning.

(13) As apparent from FIG. 5, the projections 23, 24 are arranged on one line 28 that is preferably orientated parallel to the groove 27 (if provided) as well as to the narrow side 20. On this line 28 or in the proximity thereof, a fastening opening 29 is additionally provided. The line 28 intersects the fastening opening 29, wherein the center point of the opening is preferably, but not obligatory, located on the line 28. The fastening opening 29 penetrates the contact surface 21 and the whole module body 11. The diameter of the preferably circular fastening opening 29 is preferably only slightly larger than the fastening element in order to achieve a weakening of the module body 11 in the proximity of the fastening opening 29 that is as low as possible. The fastening opening 29 can be surrounded from an insert 30 consisting for example of brass or another suitable material that is inserted in the die during the molding production of the module body 11. This allows the support of high fastening forces without damage of the module body 11 consisting of zinc die-cast or a similar material. The fastening opening 29 can be provided with an inner thread. It is however also possible to omit such an insert 30.

(14) The module body 11 thus comprises a fastening section 31 that comprises the projections 23, 24 (if present) as well as the fastening opening 29. Further, the module body 11 comprises a holding section 32 into which the fastening ends of the shanks of the tools 12-18 extend. Between the fastening section 31 and the holding section 32 one, preferably multiple additional openings 33, 34 are provided in the module body 11 as particularly apparent from FIGS. 2, 3 and 5. The additional openings 33, 34 are configured with an area that is as large as possible and are preferably symmetrically arranged to a line that is defined by the center point of opening 29 and the center axis of the center tool 15. This applies for an uneven tool number. In case of an even tool number, the mirror axis to which the openings 33, 34 are symmetrically located is defined by a line that extends through the center point of the fastening opening 29 on one hand and in the middle between two tools on the other hand.

(15) The additional opening 33 or 34 respectively comprises preferably a trapezoidal basic shape with rounded corners and overlaps with reference to the axial direction of the tools 12-18 (vertical direction in FIGS. 3 and 5) the respectively adjacent projection 23 or 24 as well as the fastening opening 29. By way of example of the additional opening 43 this is symbolized in FIG. 5 by two dashed lines 35, 36. If the projection 23 is missing the outer opening border of the opening 34 and thus the line 35 preferably extends through the outside located tool 18 anyway. The same applies for the opening 33 and the tool 12.

(16) The long edge of the trapezoidal-shaped basic structure at the fastening opening facing the projection 23 can be bulged outwardly in an arc-shaped manner. Additionally, the corners are preferably rounded. In doing so, a connection structure is created between the fastening section 31 and the holding section 32 formed by three webs 33, 38, 39 (FIG. 3) via which the fastening section 31 is connected with the holding section 32. The two webs 37 and 39 preferably comprise a corresponding rectangular or square cross-section and are orientated parallel to each other and have equal length. The center web 38 can be configured shorter and is preferably aligned with the center tool 15. It is preferably orientated parallel to the outer webs 37, 39 and can have the same cross-section as the outer webs 37, 39 or can comprise a cross-section deviating therefrom. The outer tools 12, 18 can be aligned with the webs 37, 39.

(17) The tool module 10 described so far is attached to a bar during operation in that it is brought in the desired position in the alignment structure 22 and fixed in this position. If present projections 23, 24 are inserted in corresponding cutouts of the bar and the rib or ridge 26 as well as the contact surface 21 are brought into contact with the bar. By means of a screw or a suitable corresponding means that extends in or through the fastening opening 29, the tool module is captively held at the bar.

(18) In operation the bar oscillates substantially in axial direction of the tools 12-18 back and forth, wherein the tools 12-18 come into frictional engagement with the respective mostly two-dimensional textile and execute an operation at the same, for example piercing a thread therethrough, form loops or the like. The friction occurring at the tools 12-18 heats them, wherein the heat is introduced to a certain proportion in the module body 11. The reduced contact surface 21 impedes however the transfer of heat to the bar. Concurrently, the openings 33, 34 swirlingly act on the ambient air during fast back and forth movement of the bar and thus support the heat dissipation, particularly from the holding section 32. The webs 37, 38, 39 further reduce the heat transfer from the holding section 32 to the fastening section 31.

(19) It is indicated that the additional openings 33, 34 lead to a weight reduction of the module body 11 such that its material choice can be made independent from the material density. The weight reduction reduces the dynamic stress of the bar and the machine parts guiding it during the oscillating back and forth movement of the bar which in turn allows an increase of the operating speed.

(20) A tool module 10 according to the invention comprises a module body 11 with a contact surface 21 and an alignment structure 22. The contact surface 21 is penetrated by a fastening opening 29 and additionally by at least one, preferably multiple additional openings 33, 34. The area of an additional opening 33 or 34 is larger, preferably remarkably larger, for example at least two times or three times as large as the cross-section area of the fastening opening 29. In doing so, a module body 11 is provided with which an increased operation speed of the textile machine can be achieved.

LIST OF REFERENCE SIGNS

(21) 10 tool module 11 module body 12-18 tools 20 narrow side 21 contact surface 22 alignment structure 23, 24 projections 25 cutout 26 ridge 27 groove 28 line 29 fastening opening 30 insert 31 fastening section 32 holding section 33, 34 additional openings 35, 36 dashed lines 37, 38, 39 webs