EP2841632A1 - Machine for cleaning needle holder plates for knitting machines - Google Patents

Machine for cleaning needle holder plates for knitting machines

Info

Publication number
EP2841632A1
EP2841632A1 EP20130725821 EP13725821A EP2841632A1 EP 2841632 A1 EP2841632 A1 EP 2841632A1 EP 20130725821 EP20130725821 EP 20130725821 EP 13725821 A EP13725821 A EP 13725821A EP 2841632 A1 EP2841632 A1 EP 2841632A1
Authority
EP
European Patent Office
Prior art keywords
needle holder
machine
fact
work
preset
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20130725821
Other languages
German (de)
French (fr)
Other versions
EP2841632B1 (en
Inventor
Marcello GALIOTTO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=46262209&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2841632(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Priority to SI201330371A priority Critical patent/SI2841632T1/en
Priority to RS20160980A priority patent/RS55322B1/en
Publication of EP2841632A1 publication Critical patent/EP2841632A1/en
Application granted granted Critical
Publication of EP2841632B1 publication Critical patent/EP2841632B1/en
Priority to HRP20161455TT priority patent/HRP20161455T1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B08B3/024—Cleaning by means of spray elements moving over the surface to be cleaned
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B37/00—Auxiliary apparatus or devices for use with knitting machines
    • D04B37/02—Auxiliary apparatus or devices for use with knitting machines with weft knitting machines

Definitions

  • the present invention relates to a machine for cleaning needle holder plates for knitting machines.
  • Knitting machines are known of the automated type, which have a plurality of moving needles suitable for intertwining the stitches of one or more yarns.
  • needles are usually fitted on a needle holder plate, so-called “needle bed”, which has a rectangular shape and a series of grooves.
  • the needles are housed in a sliding way along an equal number of parallel grooves and overhang out of one side of the needle holder plate, which defines the work side along which the yarns run during use.
  • one or more actuating rods so-called “sub-needles”, “sinkers” and “jacks” are also arranged in a sliding way with the aim of moving the needles according to the type of knitting job to be performed on the yarns.
  • the needle holder plates tend to become considerably dirty, not only because of the dust and fine dust but, above all, due to the yarn fibres which, passing through the machine needles, lose a number of strands.
  • the needle guide and housing grooves thus tend soon to fill with dirt, with the risk of jeopardizing and impairing normal knitting machine operation.
  • the main aim of the present invention is to provide a machine for cleaning needle holder plates for knitting machines which permits washing the needle holder plates in a practical, easy and functional way, in particularly short times and without requiring the personnel to perform long jobs.
  • Another object of the present invention is to provide a machine for cleaning needle holder plates for knitting machines which permits reducing greatly the costs for the maintenance and management of the needle holder plates.
  • Another object of the present invention is to provide a machine for cleaning needle holder plates for knitting machines which allows to overcome the mentioned drawbacks of the state of the art in the ambit of a simple, rational, easy and effective to use as well as low cost solution.
  • the present machine for cleaning needle holder plates for knitting machines characterized by the fact that it comprises: at least a base frame;
  • At least a supporting device which can be placed in correspondence to said washing tank and suitable for supporting, in a preset washing position, at least a needle holder plate for knitting machines, said needle holder plate comprising:
  • a plurality of needles for knitwear housed sliding in said grooves and having at least a work extremity which protrudes overhanging from said work side;
  • dispensing means associated with said base frame and suitable for dispensing a washing fluid under pressure towards said needle holder plate - placed in said preset washing position.
  • Figure 1 is an axonometric view of the machine according to the invention
  • Figure 2 is an axonometric view, on enlarged scale, of a detail of the needle holder plate than can be cleaned by means of the machine according to the invention
  • Figure 3 is an axonometric view, from another angle, of the needle holder plate of figure 2;
  • Figure 4 is an axonometric view, on enlarged scale, of a detail of the machine according to the invention.
  • Figure 5 is a section view of the machine according to the invention.
  • Figure 6 is an enlarged scale view of a detail of figure 5;
  • FIG. 7 is a block diagram which shows the hydraulic circuit of the machine according to the invention.
  • globally- indicated by 1 is a machine for cleaning needle holder plates for knitting machines.
  • the machine 1 is intended to wash one or more needle holder plates or needle beds 2, comprising:
  • a plurality of needles 6 for knitwear housed sliding in the grooves 5 and having at least a work extremity 7 which protrudes overhanging from the work side 4.
  • the plate-shaped body 3 has a first main face 8 and a second main face 9 opposite one another.
  • the grooves 5 are obtained on the first main face 8 and are all orthogonal to the work side 4.
  • the grooves 5 substantially extend along the entire width of the plate-shaped body 3, from the work side 4 as far as the opposite side 10.
  • the actuator rods 11 are also housed in a sliding way.
  • the attached illustrations always show just one needle holder plate 2 but it is easy to appreciate that the machine 1 is sized so as to also house several needle holder plates 2 at the same time.
  • the machine 1 comprises a base frame 12 for resting at the ground.
  • a cabinet 13 is fitted for containing the machine 1 out of which protrudes a sliding drawer mechanism 14.
  • the sliding drawer mechanism 14 is made up of a drawer that can slide horizontally between a washing configuration, wherein it is inserted in the cabinet 13, and a loading and unloading configuration, wherein it is extracted from the cabinet 13 and its contents are accessible from outside to load the needle holder plates 2 to be washed and remove the needle holder plates 2 already washed.
  • the machine 1 For the cleaning of the needle holder plates 2, the machine 1 has:
  • a supporting device 16 which can be placed in correspondence to the washing tank 15 and suitable for supporting, in a preset washing position, at least one of the needle holder plates 2; a locator element 17 which can be placed in correspondence to the washing tank 15 so that, when the needle holder plate 2 is placed in the preset washing position, the locator element 17 is arranged at a preset distance from the work side 4 and the work extremities 7 are arranged in contact - against it to prevent the needles 6 from completely exiting from the grooves
  • dispensing means 18 suitable for dispensing a washing fluid 19 under pressure towards the needle holder plate 2 placed in the preset washing position.
  • washing tank 15, the supporting device 16 and the locator element 17 are associated with the base frame 12 through a sliding drawer mechanism 14.
  • the washing tank 15, the supporting device 16 and the locator element 17 are fitted on the drawer 14, with the supporting device 16 and the locator element 17 arranged above the washing tank 15, which defines the bottom of the drawer 14.
  • the dispensing means 18, on the other hand, are arranged at the top v of the cabinet 13.
  • the supporting device 16 is shaped so that, in the preset washing position, the needle holder plates 2 are substantially tilted, with the first main face 8 turned upwards and the work side 4 turned downwards.
  • the needle holder plates 2 are arranged with the work side 4 and the opposite side 10 substantially horizontal and with the work side 4 at a lower height than the opposite side 10/
  • the supporting device 16 comprises a tilted plane 20 on which the needle holder plates 2 can be rested.
  • the second main face 9 has specific coupling holes 22a for coupling with screws 22b.
  • the locator element 17 is associated with the supporting device 16 by means of a series of supporting arms 23 extending overhanging from the tilted plane 20.
  • the locator element 17 is defined by a first edge that extends horizontally along the entire length of the tilted plane 20.
  • the work side 4 of the needle holder plates 2 is arranged substantially facing and parallel to the first edge 17.
  • the first edge 17 has a surface 17a which receives in support the work extremities of the needles 6 and which is substantially orthogonal to the tilted plane 20.
  • the machine 1 also comprises a protection element 24, which can be placed substantially between the dispensing means 18 and the work extremities 7 of the needles 6 in the preset washing position and which is suitable for protecting the work extremities 7 from the washing fluid 19.
  • the work extremities 7 can be more or less thin and fragile; to prevent the pressure of the washing fluid 19 from damaging the work extremities 7, the protection element 24 is arranged so as to divert the jet of washing fluid 19.
  • the protection element .24 is defined by a second edge which extends horizontally along the entire length of the tilted plane 20 and which is arranged substantially in the proximity of the first edge 17.
  • first edge 17 and the second edge 24 are defined by a profile having a "L"-shaped transversal section, in which one side of the "L” defines the first edge 17 while the other side of the "L” defines the second edge 24.
  • the machine 1 also comprises a positioning bar 25 which can be placed in correspondence to the washing tank 15 at a preset distance from the needle holder plates 2 so that, when the needle holder plates 2 are placed in the preset washing position, the work extremities 7 of the needles 6 are arranged resting on the positioning bar 25 and kept in a substantially inclined configuration with respect to the plate-shaped body 3.
  • the needles 6 usually enjoy a certain amount of freedom of movement which enables them, therefore, to be positioned in the above tilted configuration.
  • the positioning bar 25 is fitted on the supporting arms 23 and extends horizontally along the entire length of the tilted plane 20.
  • the positioning bar 25 has a tilted border 26, defined by a rounded or joined corner, which acts as an invitation for the positioning of the needles 6 in the tilted configuration.
  • the tilted border 26 diverts the forward movement of the needles 6 ' making them tilt with respect to the plate-shaped body 3.
  • the operation of loading the needle holder plates 2 on the machine 1 is therefore particularly easy and can be performed in just a few minutes.
  • the washing operation is generally very quick and efficient.
  • the dispensing means 18 comprise at least a nozzle 27 suitable for directing a jet of the washing fluid 19 towards the needle holder plates 2.
  • the nozzle 27, in particular, is fitted on first movement means 29, 30 suitable for moving the nozzle 27 along a direction Dl which, when the needle holder plates 2 are placed in the preset washing position, is substantially parallel to the work side 4.
  • the first movement means 29, 30, for example, comprise one or more horizontal guides 29, which define the direction Dl and on which is operated sliding a first slide 30 supporting the nozzle 27.
  • the nozzle 27 is fitted on second movement means 32, 33 suitable for moving the nozzle 27 along a direction D2 which, when the needle holder plates 2 are placed in the preset washing position, is substantially parallel to the needle holder plate 2 and to the grooves 5.
  • the second movement means 32, 33 for example, comprise one or more tilted guides 32 which are mounted on the first slide 30, and define the direction D2 and on which is operated sliding a second slide 33 supporting the nozzle 27.
  • the nozzle 27, finally, is fitted on third movement means 34 suitable for turning the nozzle 27 around a rotation axis A which, when the needle holder plates 2 are placed in the preset washing position, is substantially parallel to the work side 4.
  • the third movement means 34 are defined by a rotational actuator which is mounted on the second slide 33, defines the rotation axis A and supports the nozzle 27.
  • the machine 1 is only equipped with fixed nozzles 27, distributed so as to cover the entire extension of the needle holder plates 2.
  • the machine 1 has a reduced set of nozzles 27 fastened to the first slide 30, which are mobile along the direction Dl but which are not mobile along the direction D2 or around the rotation axis A.
  • the machine 1 has just one nozzle 27 fastened to the second slide 33, which is therefore able to move along the direction Dl and the direction D2, but not around the rotation axis A.
  • the machine 1 has just one nozzle 27 fitted on the rotational actuator 34 which, in turn, is fastened to the first slide 30; in this case, the nozzle is therefore able to move along the direction D 1 and around the rotation axis A, but not along the direction D2.
  • the washing fluid 19 used in the machine 1 is a liquid mixture specifically studied so as not to damage or deteriorate the material from which the needle holder plates 2 and the needles 6 are made;
  • the washing fluid 19, in particular, consists of a mixture of demineralised water and passivating substances, but lots of other substances or substance mixtures can be used.
  • the washing fluid 19 sprayed by the nozzle 27 is collected in the washing tank 15 and made to circulate inside a hydraulic circuit 35 (figure 7) housed in the machine 1.
  • the washing fluid 19 collected in the washing tank 15 first of all passes through a first filtering element 36, which collects up the dirt S.
  • the first filtering element 36 for example, consists of a rough filter which is intended to trap the particles of dirt S of larger size.
  • the first filtering element 36 is fitted to the base of the washing tank 15 and of the drawer 14.
  • a first pumping element 37 Downstream of the first filtering element 36, a first pumping element 37 is also housed, which operates at low pressure (2 ⁇ 4 bar) and which collects up the washing fluid coming out of the first filtering element 36 and conveys it through a second filtering element 38.
  • the second filtering element 38 for example, consists of a fine filter intended to collect up the particles of dirt S of smaller size.
  • the washing fluid 19 coming out of the second filtering element 38 then reaches a storage tank 39.
  • the storage tank 39 consists, for example, of a boiler intended to heat the washing fluid 19.
  • the washing fluid 19 used on the needle holder plates 2 does in fact have a temperature substantially between about 50 °C and 70 °C (preferably 60 °C); such temperature allows increasing the cleaning power of the washing fluid 19 and the efficacy of the wash.
  • a second pumping element 40 is positioned which is suitable for taking the washing fluid 19 from the storage tank 39 and pressurizing the washing fluid 19 before conveying it to the washing tank 15.
  • the washing fluid 19 used on the needle holder plates 2 does in fact have a pressure substantially higher than 40 bar and preferably between about 130 bar and 150 bar; such pressure allows increasing the cleaning power of the washing fluid 19 and the efficacy of the wash.
  • the hydraulic circuit 35 has two filtering elements 36, 38.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Socks And Pantyhose (AREA)

Abstract

The machine (1) for cleaning needle holder plates for knitting machines comprises: - a base frame (12); - a washing tank (15), assembled on the base frame (12); - a supporting device (16) which can be placed in correspondence to said washing tank (15) and suitable for supporting, in a preset washing position, at least a needle holder plate (2) for knitting machines, the needle holder plate (2) comprising: - a plate-shaped body (3) having a work side (4) substantially rectilinear and a plurality of grooves (5) substantially transversal to the work side (4); and - a plurality of needles (6) for knitwear, housed sliding in the grooves (5) and having a work extremity (7) which protrudes overhanging from the work side (4); and - dispensing means (18) associated with the base frame (12) and suitable for dispensing a washing fluid (19) under pressure towards the needle holder plate (2) placed in the preset washing position.

Description

MACHINE FOR CLEANING NEEDLE HOLDER PLATES FOR KNITTING MACHINES
Technical Field
The present invention relates to a machine for cleaning needle holder plates for knitting machines.
Background Art
Knitting machines are known of the automated type, which have a plurality of moving needles suitable for intertwining the stitches of one or more yarns.
The needles are usually fitted on a needle holder plate, so-called "needle bed", which has a rectangular shape and a series of grooves.
The needles are housed in a sliding way along an equal number of parallel grooves and overhang out of one side of the needle holder plate, which defines the work side along which the yarns run during use.
Inside the grooves, one or more actuating rods, so-called "sub-needles", "sinkers" and "jacks" are also arranged in a sliding way with the aim of moving the needles according to the type of knitting job to be performed on the yarns. During use of the knitting machines, the needle holder plates tend to become considerably dirty, not only because of the dust and fine dust but, above all, due to the yarn fibres which, passing through the machine needles, lose a number of strands.
The needle guide and housing grooves thus tend soon to fill with dirt, with the risk of jeopardizing and impairing normal knitting machine operation.
To wash the needle holder plates, the carrying out is known of periodical manual cleaning and maintenance jobs.
Such jobs, nevertheless, require the removal of the entire needle holder plate, the removal of all the needles and all the actuator rods from the grooves and their manual cleaning, one by one.
It is therefore easy to appreciate that these operations require a long time and qualified personnel to perform, and determine the stoppage of the knitting machine for a long time.
For all these reasons, the carrying out of traditional cleaning operations represents a fairly high cost in terms of labour and knitting machine management, a cost which, inevitably, affects the sales price of the products to customers, with the risk of making them less interesting and appealing to consumers.
Instead of manual jobs, machines are known designed to clean the needles by means of ultrasonic technology.
These machines too however usually require the complete removal of the needle holder plates and, in particular, the removal of all the needles and all the actuator rods; sometimes, these machines can operate without the needle holder plates being fully removed but, in these cases, cleaning results are not very satisfactory.
The operating cycle of traditional ultrasonic machines, furthermore, lasts several hours and is not always able to ensure a particularly high standard of cleaning. Ultrasonic machines are therefore substantially affected by the same drawbacks mentioned previously.
Description of the Invention
The main aim of the present invention is to provide a machine for cleaning needle holder plates for knitting machines which permits washing the needle holder plates in a practical, easy and functional way, in particularly short times and without requiring the personnel to perform long jobs.
Another object of the present invention is to provide a machine for cleaning needle holder plates for knitting machines which permits reducing greatly the costs for the maintenance and management of the needle holder plates.
Another object of the present invention is to provide a machine for cleaning needle holder plates for knitting machines which allows to overcome the mentioned drawbacks of the state of the art in the ambit of a simple, rational, easy and effective to use as well as low cost solution.
The above objects are achieved by the present machine for cleaning needle holder plates for knitting machines, characterized by the fact that it comprises: at least a base frame;
- at least a washing tank, assembled on said base frame;
at least a supporting device which can be placed in correspondence to said washing tank and suitable for supporting, in a preset washing position, at least a needle holder plate for knitting machines, said needle holder plate comprising:
at least a plate-shaped body having a work side substantially rectilinear and a plurality of grooves substantially transversal to said work side; , and
a plurality of needles for knitwear, housed sliding in said grooves and having at least a work extremity which protrudes overhanging from said work side; and
dispensing means associated with said base frame and suitable for dispensing a washing fluid under pressure towards said needle holder plate - placed in said preset washing position.
Brief Description of the Drawings
Other characteristics and advantages of the present invention will become more evident from the description of a preferred, but not sole, embodiment of a machine for cleaning needle holder plates for knitting machines, illustrated purely as an example but not limited to the annexed drawings in which:
Figure 1 is an axonometric view of the machine according to the invention; Figure 2 is an axonometric view, on enlarged scale, of a detail of the needle holder plate than can be cleaned by means of the machine according to the invention;
Figure 3 is an axonometric view, from another angle, of the needle holder plate of figure 2;
Figure 4 is an axonometric view, on enlarged scale, of a detail of the machine according to the invention;
Figure 5 is a section view of the machine according to the invention;
Figure 6 is an enlarged scale view of a detail of figure 5;
Figure 7 is a block diagram which shows the hydraulic circuit of the machine according to the invention.
Embodiments of the Invention
With particular reference to such figures, globally- indicated by 1 is a machine for cleaning needle holder plates for knitting machines.
The machine 1, in particular, is intended to wash one or more needle holder plates or needle beds 2, comprising:
at least a rectangular plate-shaped body 3 having a work side 4, substantially rectilinear, and a plurality of grooves 5 substantially transversal to the work side 4; and
- a plurality of needles 6 for knitwear, housed sliding in the grooves 5 and having at least a work extremity 7 which protrudes overhanging from the work side 4.
More in detail, the plate-shaped body 3 has a first main face 8 and a second main face 9 opposite one another.
The grooves 5 are obtained on the first main face 8 and are all orthogonal to the work side 4.
The grooves 5 substantially extend along the entire width of the plate-shaped body 3, from the work side 4 as far as the opposite side 10.
Besides the needles 6, inside the grooves 5, the actuator rods 11 are also housed in a sliding way.
The attached illustrations always show just one needle holder plate 2 but it is easy to appreciate that the machine 1 is sized so as to also house several needle holder plates 2 at the same time.
The machine 1 comprises a base frame 12 for resting at the ground.
On the base frame 12 a cabinet 13 is fitted for containing the machine 1 out of which protrudes a sliding drawer mechanism 14.
The sliding drawer mechanism 14 is made up of a drawer that can slide horizontally between a washing configuration, wherein it is inserted in the cabinet 13, and a loading and unloading configuration, wherein it is extracted from the cabinet 13 and its contents are accessible from outside to load the needle holder plates 2 to be washed and remove the needle holder plates 2 already washed.
For the cleaning of the needle holder plates 2, the machine 1 has:
a washing tank 15, where the needle holder plates 2 are cleaned;
- a supporting device 16 which can be placed in correspondence to the washing tank 15 and suitable for supporting, in a preset washing position, at least one of the needle holder plates 2; a locator element 17 which can be placed in correspondence to the washing tank 15 so that, when the needle holder plate 2 is placed in the preset washing position, the locator element 17 is arranged at a preset distance from the work side 4 and the work extremities 7 are arranged in contact - against it to prevent the needles 6 from completely exiting from the grooves
5;
dispensing means 18 suitable for dispensing a washing fluid 19 under pressure towards the needle holder plate 2 placed in the preset washing position.
Usefully, the washing tank 15, the supporting device 16 and the locator element 17 are associated with the base frame 12 through a sliding drawer mechanism 14.
In other words, the washing tank 15, the supporting device 16 and the locator element 17 are fitted on the drawer 14, with the supporting device 16 and the locator element 17 arranged above the washing tank 15, which defines the bottom of the drawer 14.
The dispensing means 18, on the other hand, are arranged at the topvof the cabinet 13.
Alternative embodiments cannot however be ruled out wherein only the supporting device 16 and the locator element 17 are fitted on the drawer 14, while the washing tank 15 is arranged at the base of the cabinet 13 it is easy to appreciate that in this second case the supporting device 16 and the locator element 17 arrange themselves above the washing tank 15 in the washing configuration, i.e., when the drawer 14 is closed.
In the embodiment shown in the illustrations, the supporting device 16 is shaped so that, in the preset washing position, the needle holder plates 2 are substantially tilted, with the first main face 8 turned upwards and the work side 4 turned downwards.
In this regard, it must be explained that, in this treatise, to say that the work side 4 is turned downwards means it is arranged at a lower height than the opposite side 10.
More in detail, in the particular embodiment shown in the illustrations, the needle holder plates 2 are arranged with the work side 4 and the opposite side 10 substantially horizontal and with the work side 4 at a lower height than the opposite side 10/
Such arrangement is important to ensure a complete wash of the needle holder plates 2 and, above all, a correct drainage of the washing fluid 19 and of the dirt
S by means of the grooves 5 and their exit through the work side 4.
Alternative embodiments are also possible wherein the work side 4, though remaining at a lower height than the opposite side 10, is not perfectly horizontal, but rather tilted with respect to a horizontal plane; it is easy to appreciate that in this case as well, the fact that the work side 4 remains turned downwards with respect to the opposite side 10 ensures the correct wash and drainage of the needle holder plates 2.
Other solutions cannot however be ruled out wherein, in the preset washing position, the needle holder plates 2 are arranged substantially horizontal.
Usefully, the supporting device 16 comprises a tilted plane 20 on which the needle holder plates 2 can be rested.
To prevent the needle holder plates 2 from slipping off the tilted plane 20, the use is envisaged of a series of L-shaped brackets 21 associable with the second main face 9 of the needle holder plates 2.
For this purpose, the second main face 9 has specific coupling holes 22a for coupling with screws 22b.
The locator element 17 is associated with the supporting device 16 by means of a series of supporting arms 23 extending overhanging from the tilted plane 20. The locator element 17 is defined by a first edge that extends horizontally along the entire length of the tilted plane 20.
In the preset washing position, the work side 4 of the needle holder plates 2 is arranged substantially facing and parallel to the first edge 17.
By sectioning the machine 1 along a vertical plane orthogonal to the work side 4 (figures 5 and 6), it will be seen that the first edge 17 has a surface 17a which receives in support the work extremities of the needles 6 and which is substantially orthogonal to the tilted plane 20.
The machine 1 also comprises a protection element 24, which can be placed substantially between the dispensing means 18 and the work extremities 7 of the needles 6 in the preset washing position and which is suitable for protecting the work extremities 7 from the washing fluid 19.
In this respect, it is underlined that, depending on the type of needle holder plate 2 and the type of needles 6, the work extremities 7 can be more or less thin and fragile; to prevent the pressure of the washing fluid 19 from damaging the work extremities 7, the protection element 24 is arranged so as to divert the jet of washing fluid 19.
Advantageously, the protection element .24 is defined by a second edge which extends horizontally along the entire length of the tilted plane 20 and which is arranged substantially in the proximity of the first edge 17.
By sectioning the machine 1 with a vertical plane orthogonal to the work side 4
(figures 5 and 6), it will be seen that the second edge 24 has a transversal section tilted so as to be parallel to the tilted plane 20.
Usefully, the first edge 17 and the second edge 24 are defined by a profile having a "L"-shaped transversal section, in which one side of the "L" defines the first edge 17 while the other side of the "L" defines the second edge 24.
Alternative embodiments cannot however be ruled out wherein the first edge 17 and the second edge 24 are separated, or wherein the second edge 24 is not present; in this regard, in fact, it is underlined that to clean particularly big and sturdy needles 6, which run no risk of being damaged during washing, the machine 1 can also be without the protection element 24.
The machine 1 also comprises a positioning bar 25 which can be placed in correspondence to the washing tank 15 at a preset distance from the needle holder plates 2 so that, when the needle holder plates 2 are placed in the preset washing position, the work extremities 7 of the needles 6 are arranged resting on the positioning bar 25 and kept in a substantially inclined configuration with respect to the plate-shaped body 3.
In this respect, the fact is underlined that inside the grooves 5, the needles 6 usually enjoy a certain amount of freedom of movement which enables them, therefore, to be positioned in the above tilted configuration.
It should also be noticed that during washing, the tilted configuration makes both the flow of the washing fluid 19 through the grooves 5 and, therefore, the exit of the dirt S, considerably easier.
Similarly to the locator element 17, the positioning bar 25 is fitted on the supporting arms 23 and extends horizontally along the entire length of the tilted plane 20.
Furthermore, the positioning bar 25 has a tilted border 26, defined by a rounded or joined corner, which acts as an invitation for the positioning of the needles 6 in the tilted configuration.
For this purpose, in fact, it is enough to position the needle holder plates 2 on the tilted plane 20 and manually push the actuator rods 11 and the needles 6 so they slide along the grooves 5 towards the positioning bar 25 and the locator element 17.
When the work extremities 7 reach the positioning bar 25, the tilted border 26 diverts the forward movement of the needles 6' making them tilt with respect to the plate-shaped body 3.
Once they have reached the locator element 17, furthermore, the work extremities 7 stop and the needles 6 remain in the tilted configuration.
The operation of loading the needle holder plates 2 on the machine 1 is therefore particularly easy and can be performed in just a few minutes.
By virtue of the position taken up by the needle holder plate 2 and by the needles 6, furthermore, the washing operation is generally very quick and efficient.
It is however underlined that alternative embodiments are possible wherein the needle holder plate 2 and the needles 6 are positioned differently, as in the case wherein the positioning bar 25 is not fitted and, therefore, the needles 6 do not take up a tilted position with respect to the plate-shaped body 3.
The dispensing means 18 comprise at least a nozzle 27 suitable for directing a jet of the washing fluid 19 towards the needle holder plates 2.
In the embodiment shown in the illustrations, there is just one nozzle 27 and this is fitted inside the cabinet 13 in a mobile way to serve the needle holder plates 2 along their entire length and clean all the grooves 5.
The nozzle 27, in particular, is fitted on first movement means 29, 30 suitable for moving the nozzle 27 along a direction Dl which, when the needle holder plates 2 are placed in the preset washing position, is substantially parallel to the work side 4.
The first movement means 29, 30, for example, comprise one or more horizontal guides 29, which define the direction Dl and on which is operated sliding a first slide 30 supporting the nozzle 27.
Furthermore, the nozzle 27 is fitted on second movement means 32, 33 suitable for moving the nozzle 27 along a direction D2 which, when the needle holder plates 2 are placed in the preset washing position, is substantially parallel to the needle holder plate 2 and to the grooves 5.
The second movement means 32, 33, for example, comprise one or more tilted guides 32 which are mounted on the first slide 30, and define the direction D2 and on which is operated sliding a second slide 33 supporting the nozzle 27. The nozzle 27, finally, is fitted on third movement means 34 suitable for turning the nozzle 27 around a rotation axis A which, when the needle holder plates 2 are placed in the preset washing position, is substantially parallel to the work side 4.
The third movement means 34, for example, are defined by a rotational actuator which is mounted on the second slide 33, defines the rotation axis A and supports the nozzle 27.
Alternative embodiments cannot however be ruled out wherein several nozzles 27 are envisaged, fixed or moved differently.
In one possible alternative embodiment for example, the machine 1 is only equipped with fixed nozzles 27, distributed so as to cover the entire extension of the needle holder plates 2.
In another alternative embodiment, on the other hand, the machine 1 has a reduced set of nozzles 27 fastened to the first slide 30, which are mobile along the direction Dl but which are not mobile along the direction D2 or around the rotation axis A.
In a further alternative embodiment, on the other hand, the machine 1 has just one nozzle 27 fastened to the second slide 33, which is therefore able to move along the direction Dl and the direction D2, but not around the rotation axis A. Finally, in yet another alternative embodiment, the machine 1 has just one nozzle 27 fitted on the rotational actuator 34 which, in turn, is fastened to the first slide 30; in this case, the nozzle is therefore able to move along the direction D 1 and around the rotation axis A, but not along the direction D2. Usefully, the washing fluid 19 used in the machine 1 is a liquid mixture specifically studied so as not to damage or deteriorate the material from which the needle holder plates 2 and the needles 6 are made; the washing fluid 19, in particular, consists of a mixture of demineralised water and passivating substances, but lots of other substances or substance mixtures can be used.
The washing fluid 19 sprayed by the nozzle 27 is collected in the washing tank 15 and made to circulate inside a hydraulic circuit 35 (figure 7) housed in the machine 1.
Along the hydraulic circuit 35, the washing fluid 19 collected in the washing tank 15 first of all passes through a first filtering element 36, which collects up the dirt S.
The first filtering element 36, for example, consists of a rough filter which is intended to trap the particles of dirt S of larger size.
Conveniently, the first filtering element 36 is fitted to the base of the washing tank 15 and of the drawer 14.
Downstream of the first filtering element 36, a first pumping element 37 is also housed, which operates at low pressure (2 ÷ 4 bar) and which collects up the washing fluid coming out of the first filtering element 36 and conveys it through a second filtering element 38.
The second filtering element 38, for example, consists of a fine filter intended to collect up the particles of dirt S of smaller size.
The washing fluid 19 coming out of the second filtering element 38 then reaches a storage tank 39.
The storage tank 39 consists, for example, of a boiler intended to heat the washing fluid 19.
The washing fluid 19 used on the needle holder plates 2 does in fact have a temperature substantially between about 50 °C and 70 °C (preferably 60 °C); such temperature allows increasing the cleaning power of the washing fluid 19 and the efficacy of the wash.
Between the storage tank 39 and the dispensing means 18, a second pumping element 40 is positioned which is suitable for taking the washing fluid 19 from the storage tank 39 and pressurizing the washing fluid 19 before conveying it to the washing tank 15.
The washing fluid 19 used on the needle holder plates 2 does in fact have a pressure substantially higher than 40 bar and preferably between about 130 bar and 150 bar; such pressure allows increasing the cleaning power of the washing fluid 19 and the efficacy of the wash.
As already said, the hydraulic circuit 35 has two filtering elements 36, 38.
It must be underlined however that, in normal operating conditions, the machine 1 is able to perform cleaning of such efficacy that the dirt S is removed very quickly and without excessive disintegration; most of the removed dirt S therefore has a rather large grain size and is collected up in correspondence to the first filtering element 36.
Maintenance operations aimed at cleaning the filtering elements 36, 38 more often than not therefore only involve cleaning the first filtering element 36 which, being fitted to the base of the drawer 14, is also easily accessible and very quickly cleanable.

Claims

1) Machine (1) for cleaning needle holder plates for knitting machines, characterized by the fact that it comprises:
at least a base frame (12);
- at least a washing tank (15), assembled on said base frame (12);
at least a supporting device (16) which can be placed in correspondence to said washing tank (15) and suitable for supporting, in a preset washing position, at least a needle holder plate (2) for knitting machines, said needle holder plate (2) comprising:
- at least a plate-shaped body (3) having a work side (4) substantially rectilinear and a plurality of grooves (5) substantially transversal to said work side (4); and
a plurality of needles (6) for knitwear, housed sliding in said grooves (5) and having at least a work extremity (7) which protrudes overhanging from said work side (4); and
dispensing means (18) associated with said base frame (12) and suitable for dispensing a washing fluid (19) under pressure towards said needle holder plate (2) placed in said preset washing position.
2) Machine (1) according to the claim 1, characterized by the fact that, in said preset washing position, said needle holder plate (2) is substantially inclined with said work side (4) turned downwards.
3) Machine (1) according to one or more of the preceding claims, characterized by the fact that it comprises at least a locator element (17) which can be placed in correspondence to said washing tank (15) at a preset distance from said work side (4) of the needle holder plate (2) placed in said preset washing position, said work extremity (7) being arranged in contact against said locator element (17) to prevent said needles (6) from completely exiting from said grooves (5).
4) Machine (1) according to the claim 3, characterized by the fact that said supporting device (16) and said locator element (17) are associated with said base frame (12) through a sliding drawer mechanism (14).
5) Machine (1) according to the claim 3 or 4, characterized by the fact that said locator element (17) comprises at least a first edge, in said preset washing position said work side (4) of the needle holder plate (2) being substantially facing and parallel to said first edge (17).
6) Machine (1) according to one or more of the preceding claims, characterized by the fact that it comprises at least a protection element (24), which can be placed substantially between said dispensing means (18) and said work extremities (7) of said needles (6) in said preset washing position and which is suitable for protecting said work extremities (7) from said washing fluid (19).
7) Machine (1) according to the claims 5 and 6, characterized by the fact that said protection element (24) comprises at least a second edge arranged substantially in the proximity of said first edge (17).
8) Machine (1) according to the claim 7, characterized by the fact that said first edge (17) and said second edge (24) are defined by a profile having a "L"- shaped transversal section.
9) Machine (1) according to one or more of the preceding claims, characterized by the fact that it comprises at least a positioning bar (25) which can be placed in correspondence to said washing tank (15) at a preset distance from said needle holder plate (2) placed in said preset washing position, said work extremities (7) of the needles (6) being arranged resting on said positioning bar (25) and kept substantially inclined with respect to said plate- shaped body (3).
10) Machine (1) according to one or more of the preceding claims, characterized by the fact that said dispensing means (18) comprise at least a nozzle (27) suitable for directing a jet of said washing fluid (19) towards said needle holder plate (2).
11) Machine (1) according to the claim 10, characterized by the fact that it comprises first movement means (29, 30) of said nozzle (27) suitable for moving said nozzle (27) along a direction (Dl) substantially parallel to said work side (4) in said preset washing position.
12) Machine (1) according to the claim 10 or 1 1, characterized by the fact that it comprises second movement means (32, 33) of said nozzle (27) suitable for moving said nozzle (27) along a direction (D2) substantially parallel to said needle holder plate (2) and to said grooves (5) in said preset washing position. 13) Machine (1) according to one or more of the claims from 10 to 12, characterized by the fact that it comprises third movement means (34) of said nozzle (27) suitable for turning said nozzle (27) around a rotation axis (A) substantially parallel to said work side (4) in said preset washing position.
EP13725821.6A 2012-04-26 2013-04-22 Machine for cleaning needle holder plates for knitting machines Active EP2841632B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SI201330371A SI2841632T1 (en) 2012-04-26 2013-04-22 Machine for cleaning needle holder plates for knitting machines
RS20160980A RS55322B1 (en) 2012-04-26 2013-04-22 Machine for cleaning needle holder plates for knitting machines
HRP20161455TT HRP20161455T1 (en) 2012-04-26 2016-11-03 Machine for cleaning needle holder plates for knitting machines

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000110A ITMO20120110A1 (en) 2012-04-26 2012-04-26 CLEANING MACHINE FOR NEEDLE-HOLDER PLATES FOR KNITTING MACHINES
PCT/IB2013/053165 WO2013160817A1 (en) 2012-04-26 2013-04-22 Machine for cleaning needle holder plates for knitting machines

Publications (2)

Publication Number Publication Date
EP2841632A1 true EP2841632A1 (en) 2015-03-04
EP2841632B1 EP2841632B1 (en) 2016-08-10

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EP13725821.6A Active EP2841632B1 (en) 2012-04-26 2013-04-22 Machine for cleaning needle holder plates for knitting machines

Country Status (12)

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EP (1) EP2841632B1 (en)
CN (1) CN104246041B (en)
BR (1) BR112014026629B1 (en)
ES (1) ES2601159T3 (en)
HR (1) HRP20161455T1 (en)
HU (1) HUE031816T2 (en)
IT (1) ITMO20120110A1 (en)
PL (1) PL2841632T3 (en)
RS (1) RS55322B1 (en)
RU (1) RU2624177C2 (en)
SI (1) SI2841632T1 (en)
WO (1) WO2013160817A1 (en)

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ITUB20155581A1 (en) * 2015-11-13 2017-05-13 Maritex S R L GROUP AND METHOD OF WASHING OF PLATES HOLDING NEEDLES FOR KNITTING MACHINES.
IT201700113735A1 (en) * 2017-10-10 2019-04-10 Marcello Galiotto CLEANING MACHINE FOR NEEDLE-HOLDER CYLINDERS FOR TEXTILE MACHINES
CN110860503A (en) * 2018-08-27 2020-03-06 张晶 Machine for cleaning the needle-bar of a knitting machine
CN110125066A (en) * 2019-03-21 2019-08-16 力颖自动化设备（昆山）有限公司 Full-automatic computerized flat needle plate cleaning machine and its control method
JP7204557B2 (en) * 2019-03-26 2023-01-16 株式会社島精機製作所 Needle bed cleaning device for compound needles
IT201900009807A1 (en) * 2019-06-21 2020-12-21 Niki Rinaldi CARRIAGE WASHING MACHINE
CN113102319B (en) * 2021-03-26 2022-07-01 桐乡市桐诚科技有限公司 Automatic maintenance and cleaning equipment and maintenance method for sinker of flat knitting machine

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See also references of WO2013160817A1

Also Published As

Publication number Publication date
ITMO20120110A1 (en) 2013-10-27
RU2624177C2 (en) 2017-06-30
WO2013160817A1 (en) 2013-10-31
HRP20161455T1 (en) 2017-01-27
PL2841632T3 (en) 2017-02-28
CN104246041B (en) 2016-10-05
HUE031816T2 (en) 2017-08-28
BR112014026629B1 (en) 2021-05-04
RS55322B1 (en) 2017-03-31
EP2841632B1 (en) 2016-08-10
RU2014140836A (en) 2016-06-20
SI2841632T1 (en) 2016-12-30
CN104246041A (en) 2014-12-24
ES2601159T3 (en) 2017-02-14
BR112014026629A2 (en) 2017-06-27

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