EP3168352A1 - Unit and method for washing needle holder plates for knitting machines - Google Patents

Unit and method for washing needle holder plates for knitting machines Download PDF

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Publication number
EP3168352A1
EP3168352A1 EP16195279.1A EP16195279A EP3168352A1 EP 3168352 A1 EP3168352 A1 EP 3168352A1 EP 16195279 A EP16195279 A EP 16195279A EP 3168352 A1 EP3168352 A1 EP 3168352A1
Authority
EP
European Patent Office
Prior art keywords
washing
nozzle
head
needle holder
jet
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.)
Withdrawn
Application number
EP16195279.1A
Other languages
German (de)
English (en)
French (fr)
Inventor
Niki RINALDI
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.)
Maritex Srl
Original Assignee
Maritex Srl
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
Application filed by Maritex Srl filed Critical Maritex Srl
Publication of EP3168352A1 publication Critical patent/EP3168352A1/en
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
    • 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
    • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
    • D04B35/32—Devices for removing lint or fluff
    • 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 invention relates to a unit and a method for washing needle holder plates for knitting machines.
  • this invention relates to a unit and a method for washing needle holder plates, so-called “needlebeds", which form part of the current machines for the industrial production of knitwear fabrics and sheets.
  • the needle holder heads of the current knitting machines of the movable carriage type generally consist of a supporting plate made of metallic material, usually of rectangular elongate shape, which has a series of transversal rectilinear grooves on the upper face.
  • the grooves one parallel to the other, extend at right angles to the longitudinal axis of the plate for the entire relative width.
  • each groove a respective needle of oblong and flattened shape is inserted in an axially slidable manner in such a way that it can move between a completely extracted position wherein the hook shaped end of the needle protrudes in a cantilever fashion from the side wall of the supporting plate by a maximum predetermined length and a completely retracted position wherein the entire needle is housed inside the body of the support plate.
  • the above-mentioned needle holder head comprises a needle moving selector, which is also inserted in an axially slidable manner inside the rectilinear transversal groove behind the needle, and is hooked to the latter in such a way as to be able to move forwards and backwards between the two limit positions described above.
  • the above-mentioned selector element is equipped with a control tooth which projects in a cantilever fashion and at right angles from the upper face of the supporting plate.
  • Each tooth is designed to be selectively hooked by the cam movement device of the movable carriage of the knitting machine, in such a way as to be moved along a direction parallel to the transversal rectilinear groove, allowing the needle to be selectively moved inside the groove.
  • the needle holder head comprises, inside each rectilinear groove, also a "plate" which, acting in conjunction with the heal of the needle and/or the needle moving selector, is able to give differential commands to the needle, varying the relative position inside the rectilinear groove.
  • the needle holder heads In order for the needle holder heads to operate normally they must be regularly subjected to washing since, as mentioned above, during normal operation of the knitting machine, the fluff tends to accumulate on the bottom of the individual transversal rectilinear grooves until they completely block the movement of the needle inside the groove.
  • Machines are currently known for the industrial production of knitwear which comprise a tank inside of which there is a structure for supporting the above-mentioned needle holder head positioned with its longitudinal axis parallel to the longitudinal axis of the tank.
  • a runner is mounted in a movable fashion above the needle holder head in such a way that it can move with a to and fro motion along the same direction parallel to the axis of the tank, relative to the head.
  • the head cleaner runner is shaped in such a way as to touch the upper face of the needle holder head over its entire length.
  • the cleaning runner is provided with a plurality of nozzles each of which is connected to a hydraulic circuit from which it receives a flow of water and/or solvents under pressure and directs them against the upper surface of the needle holder head.
  • the head cleaner runner is provided, on its surface facing the surface of the needle holder head, with a mechanism for movement of the needles, consisting usually of a cam profile which, when advancing along the above-mentioned longitudinal direction, encounters the teeth of plates and allows the forwards and backwards movement of each needle inside the respective seat or groove.
  • a second embodiment of these machines comprises a supporting frame located inside the tank and on which the needle holder plate is placed.
  • a shelf positioned on the supporting frame in an inclined fashion in such a way that the needle holder plate, when it is positioned on the shelf, is inclined with its front part, coinciding with the working part from which the needles protrude, positioned at a height lower than that rear part.
  • This arrangement is important in order to guarantee a complete washing of the needle holder plate and a correct drainage of the washing fluid and the dirt through the grooves and their escape through the working side.
  • the needle holder plate Once the needle holder plate is positioned on the inclined surface, they are pushed manually, applying force on the respective "plate”, so that needles slide along the grooves towards a contact bar.
  • a dispensing device equipped with nozzles which are able to direct a jet of washing fluid towards the needle holder plates, starts the washing procedure moving forwards and backwards along washing lines with directions parallel to the longitudinal axis of the needle holder plate and parallel to each other in such a way as to cover the entire surface of the plate.
  • the dispensing device In order to reach all the various longitudinal feed and return directions, the dispensing device, once it has travelled completely along the first washing line, moves transversally to reach another washing line which it travels along in the opposite direction.
  • the cam movement device of the movable carriage which selectively couples each tooth of the plate and allows the movement forwards and backwards of each needle into the respective seat or groove constitutes, simultaneously, a rotoidal and prismatic pair which requires maintenance and is also expensive.
  • nozzles in the first case these cannot be oriented and cannot, therefore, be optimised on the basis of the model and the manufacture of the needle holder plates, and in the second case they require a very complex movement system which, however, does not protect it against damage.
  • the aim of this invention is to provide a unit and a method for washing needle holder plates for knitting machines which overcomes the above-mentioned drawbacks of the prior art.
  • the aim of this invention is to provide a unit and a method for washing needle holder plates for knitting machines which are able to remove the deepest and most compact deposits of fluff without the use of complex mechanical devices for moving the needles along their grooves and without the need for manual intervention by the operator.
  • a unit for washing needle holder plates for knitting machines comprising a tank with a longitudinal main axis of extension and comprising therein a supporting shelf, a rectangular needle holder plate which extends along the direction of the longitudinal axis of the tank and is positioned on the supporting shelf, the needle holder plate comprising a plurality of grooves which extend transversely to the axis of the tank and one after the other, closed on one side and open on an operating side, a plurality of needles, each of which is positioned in the respective groove and is free to move along the groove, protruding partly on the operating side to then retract completely, characterised in that the washing unit comprises a washing head, a device for supporting the washing head comprising a first guide which extends in longitudinal direction parallel to the longitudinal axis of the tank, and a second guide which extends in a direction transversal perpendicular to the first, the head supporting device may performs a first sliding with a first law of motion along the first guide in both the forward and return directions
  • the washing unit 1 uses an innovative washing head 2 based on a multi nozzle system, with tendentially different pressures, amplitudes and orientations.
  • the activation of the nozzle is performed thanks to a mechanical system directly implemented on the nozzle mounting head and triggered by simply reaching the stroke end.
  • the pressurised jets of cleaning liquid may be generically classified as:
  • the operation of the machine comprises starting up the washing cycle in the direction longitudinal to the tank using at least a low pressure jet and at least a medium pressure jet: the dirt is pre-treated by the low pressure and the less stubborn part is removed and evacuated by the medium pressure.
  • the head carrying device is moved to the end of the stroke in a transversal direction, the mechanical system deactivates the low pressure jet and activates the high pressure jet: the more stubborn dirt or that which is difficult to reach is finally removed and evacuated towards the tank of the hydraulic system.
  • the cleaning cycle is performed solely using the low and medium pressure washing head configuration.
  • the first advantage lies in the availability of jets of cleaning liquid which are suitable for washing any type of dirt present in knitting machines in the fabric production area.
  • the second advantage lies in the availability of jets of cleaning liquid which are suitable for washing any type of metal and plastic component present in knitting machines in the fabric production area.
  • the third advantage lies in the further optimisation of the timing and the effectiveness of the pressurised jets since several washing steps are no longer necessary as pre-washing, cleaning and discharging are carried out almost at the same time (superposed steps).
  • the fourth advantage lies in the simplicity and optimisation of the change of washing configuration of the nozzles which requires simply the mechanical movement of the piston which passes through the washing head, a movement already provided for the correct reaching of the various areas to be washed.
  • the innovation of the washing head therefore allows the complete elimination of systems dedicated to the change of configuration of the active needles.
  • Guards are not required to prevent damage since the above-mentioned innovations provide pressurised jets suitable for each condition and simplify the implementation of a program for the complete control of the head carrying device and the relative jets.
  • the unit 1 for washing plates 3 of needle holders 4 is designed to be mounted on knitting machines.
  • the latter comprising a tank 5 with a main longitudinal axis 6 of extension which comprises inside it a support shelf 7.
  • a plate 3 for needle holders 4 which is rectangular in shape that extends along the direction of the longitudinal axis 6 of the tank 5 is positioned on the support shelf 7.
  • the needle holder plate comprises a plurality of grooves 8 which extend transversely to the axis of the tank. They are positioned one after another and are closed on one side 9 and open on a working side 10.
  • a plurality of needles each of which is positioned inside the respective groove, is free to move along the groove itself coming out partly from the working part 10 and then re-entering completely.
  • the washing unit comprises a washing head and a device for supporting the washing head.
  • the supporting device comprises a first guide 11 extending in a longitudinal direction parallel to the longitudinal axis of the tank and a second guide extending in a transversal direction perpendicular to the first.
  • the device for supporting the head can perform a first sliding with a first law of motion along the first guide in both the forward F1 b and return F2b directions.
  • the washing head is mounted slidably on the second guide 12 and may perform a second sliding with a second law of motion along the second guide in both directions, F1a and F2a.
  • the washing head 2 comprises at least one first nozzle 13 able to generate a first jet 13a of washing liquid directed and oriented perpendicularly towards the needle holder plate, and at least one second nozzle 14 able to generate a second washing jet 14a directed and oriented inclined towards the needle holder plate.
  • the first and the second jet extend in a plane lying perpendicular to the longitudinal axis of the tank.
  • the washing head comprises a third nozzle 15 positioned on the opposite side of the second nozzle 14 relative to the first 13, and able to generate a third washing jet 15a directed and oriented inclined towards the needle holder plate, in mirrored direction relative to the second washing jet and lying on the same lying plane.
  • the washing head comprises a valve body 16 with an inlet for the washing liquid and three paths for feeding the first, second and third nozzle.
  • a piston shutter 17 positioned inside the valve body can move between two positions along a seat made in the valve body and defined by a first end position wherein it opens the first and the second nozzle, thus closing the third nozzle, and a second end position wherein it opens the first and the third nozzle, thus closing the second nozzle.
  • the device for supporting the head reaches a first and a second operating end position.
  • the washing head Whilst in performing the second sliding along the second guide, the washing head also reaches a first and a second operating end position.
  • the first operating end position reached by the supporting device coincides with the first operating end position of the head to which corresponds the first operating end position of the shutter piston, with subsequent opening of the first and second nozzle;
  • the first nozzle At the first operating end position reached by the supporting device and at the first operating end position reached by the washing head, the first nozzle generates the first jet of fan-spray type and the second nozzle generates the second full cone jet directed inclined towards the side of the needle holder plate wherein the grooves are closed and the needles remain completely inside the respective grooves without moving along them.
  • the first nozzle At the second operating end position reached by the supporting device and at the second operating end position reached by the washing head, the first nozzle generates the first jet of fan-spray type and the third nozzle generates the third full cone jet directed inclined towards the side of the needle holder plate wherein the grooves are open and pushes the needles towards their partly extracted position from the relative grooves with subsequent movement of the needles and increased washing effectiveness of the grooves and of the needles.
  • the first nozzle has a full fan-spray jet with low flow rate whereby the force which it applies on the surface of the needle holder plate is relatively low, the second nozzle has a full cone jet which is cylindrical in shape and is at average flow rate with pressure on the needle holder plate greater than the other jets; the third nozzle has a higher flow rate factor than the others and average pressure.
  • the second jet and the third jet leave their relative nozzles while forming an alpha angle with the first jet; the alpha angle can vary between 25° and 55°, preferably 45°.
  • the operation of the third nozzle occurs for the entire time during which the first sliding of the washing head support is performed in the second return direction between the second and the first operating end position.
  • Figure 1 is a schematic view from above of the tank for containing the washing unit of the needlebeds.
  • the tank has a longitudinal axis, parallel to which extend two guides for the supporting and sliding of a supporting device.
  • Figure 1 - The movement of the supporting device both from left to right (1st longitudinal direction F1 b) and from right to left (2nd longitudinal direction F2a) - for someone observing, obviously, Figure 1 - is achieved by an endless belt 18 trained around two end pulleys and moved by motor means (the belt and the motor means are not illustrated).
  • the first vertical nozzle with the first flow or fan-spray jet and a second nozzle inclined at an angle to the vertical of the first jet are opened.
  • the device starts to move along the first longitudinal direction and carries out a first washing of the needlebed with the 1st and the 2nd nozzle.
  • the piston encounters the second contact element, runs inside the washing head closing the 2nd nozzle and opening the third nozzle Reference is made to the Figure 3 .
  • the device starts to move from right to left, along the 2nd longitudinal direction.
  • the head has active the 1 st nozzle with its 1 st jet and the 3rd nozzle with its 3rd jet.
  • the third jet is also a tubular jet.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Treatment Of Fiber Materials (AREA)
EP16195279.1A 2015-11-13 2016-10-24 Unit and method for washing needle holder plates for knitting machines Withdrawn EP3168352A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITUB2015A005581A ITUB20155581A1 (it) 2015-11-13 2015-11-13 Gruppo e metodo di lavaggio di piastre porta aghi per macchine da maglieria.

Publications (1)

Publication Number Publication Date
EP3168352A1 true EP3168352A1 (en) 2017-05-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP16195279.1A Withdrawn EP3168352A1 (en) 2015-11-13 2016-10-24 Unit and method for washing needle holder plates for knitting machines

Country Status (3)

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EP (1) EP3168352A1 (it)
CN (1) CN106702588A (it)
IT (1) ITUB20155581A1 (it)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201700113735A1 (it) * 2017-10-10 2019-04-10 Marcello Galiotto Macchina per la pulizia di cilindri porta-aghi per macchine tessili
EP3715513A1 (en) * 2019-03-26 2020-09-30 Shima Seiki Mfg., Ltd. Cleaning apparatus for a needle bed of compound needles
IT201900009807A1 (it) * 2019-06-21 2020-12-21 Niki Rinaldi Macchina lavaggio carro

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110860503A (zh) * 2018-08-27 2020-03-06 张晶 用于清洗针织机插针板的机器

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTV20110150A1 (it) * 2011-11-04 2013-05-05 L G Project S R L Metodo per il lavaggio delle teste porta-aghi delle macchine da maglieria e macchina implementante tale metodo
WO2013160817A1 (en) * 2012-04-26 2013-10-31 Galiotto Marcello Machine for cleaning needle holder plates for knitting machines

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTV20110150A1 (it) * 2011-11-04 2013-05-05 L G Project S R L Metodo per il lavaggio delle teste porta-aghi delle macchine da maglieria e macchina implementante tale metodo
WO2013160817A1 (en) * 2012-04-26 2013-10-31 Galiotto Marcello Machine for cleaning needle holder plates for knitting machines

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201700113735A1 (it) * 2017-10-10 2019-04-10 Marcello Galiotto Macchina per la pulizia di cilindri porta-aghi per macchine tessili
WO2019073368A1 (en) * 2017-10-10 2019-04-18 Galiotto Marcello MACHINE FOR CLEANING CYLINDERS WITH NEEDLE HOLDERS FOR TEXTILE MACHINERY
EP3715513A1 (en) * 2019-03-26 2020-09-30 Shima Seiki Mfg., Ltd. Cleaning apparatus for a needle bed of compound needles
JP2020158914A (ja) * 2019-03-26 2020-10-01 株式会社島精機製作所 複合針用の針床洗浄装置
KR20200115230A (ko) * 2019-03-26 2020-10-07 가부시키가이샤 시마세이키 세이사쿠쇼 복합바늘용의 니들베드 세정장치
CN111748903A (zh) * 2019-03-26 2020-10-09 株式会社岛精机制作所 复合针用的针床清洗装置
KR102291262B1 (ko) 2019-03-26 2021-08-18 가부시키가이샤 시마세이키 세이사쿠쇼 복합바늘용의 니들베드 세정장치
CN111748903B (zh) * 2019-03-26 2022-05-10 株式会社岛精机制作所 复合针用的针床清洗装置
JP7204557B2 (ja) 2019-03-26 2023-01-16 株式会社島精機製作所 複合針用の針床洗浄装置
IT201900009807A1 (it) * 2019-06-21 2020-12-21 Niki Rinaldi Macchina lavaggio carro

Also Published As

Publication number Publication date
CN106702588A (zh) 2017-05-24
ITUB20155581A1 (it) 2017-05-13

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