WO1988007601A1

WO1988007601A1 - Machine for quick and delicate dyeing of yarn in hanks

Info

Publication number: WO1988007601A1
Application number: PCT/IT1987/000026
Authority: WO
Inventors: Mario Scatizzi
Original assignee: Mario Scatizzi
Priority date: 1987-04-03
Filing date: 1987-04-03
Publication date: 1988-10-06

Abstract

The machine which enables both quick and delicate dyeing operations consists of a dyeing tank (6) in which one or more fixed housings (2) are fitted which consist of bored cylindrical pipes that bring the extractable reels (1). Furthermore, injectors (10) are foreseen to which the dyeing bath is conveyed by means of a pipe and valve system, to be then injected into different points of both inside and outside hanks circumference. Moreover, a system is performed for the circulation of the dyeing bath and for its forced recycling by means of a centrifugal motor-driven pump (9); this bath is previously prepared in a cylindrical container (11) in which an autonomous heat exchanger (12) is fitted for the bath pre-heating. The hanks are charged and discharged by means of mobile trucks (3) with reel-carriers (2) and with the extractable and interchangeable reels (1). The said reels are fitted into the dyeing unit (6) and kept in continuous and alternate movement through a motor system (7). Alternatively, instead of one reel type (1) a second reel type (14) manufactured so as to act an eccentric during the rotation phase and which, consequently, moves the hanks in a soft way, can be fitted. The whole machine can be operated by means of an electro-pneumatic control board for the complete automation of the cycle.

Description

Machine for quick and delicate dyeing of yarn in hanks.

The invention device is an improvement of the machine as per the previous Italian Patent Applications no. 45505A/85 of the 18th Ja nuary 1905 and no. 45506A/85 of the 13th February 1985, filed in the name of the same Applicant of the present application. The in vention device allows a universal use of the machine because, be side the quick dyeing, even delicate items can be dyed, all that by keeping unchanged the features of the machine base, namely: the reduced bath-fibre ratio which allows a limited energy and water consumption, and the arms with extractable reels which allows their loading and unloading outside the unit.

This one essentially consists of: a) parallelopiped tank wherein one or more fixed housings of extractable reel carriers are fores en; these housings consist of thick cylindrical pipes, drilled in their heigher part, v/ith one or more rows of bores along their who le length; b) more injection bored pipes fitted outside and inside the hank positioning, for injection in more points of both their inside and outside circumference; c) system of pipes and valves for conveying the dyeing bath at wish in different senses; d) sy¬ stem for circulation o^ the dyeing bath and its forced recircula- tion by means of centrifugal motor-driven pump; e) heat exchanger for heating and cooling the dyeing bath; f) cylindrical container for preparing the dyeing baths, complete with autonomous heat ex¬ changer for pre-heating the baths therein contained and prepared; g) reel stick trucks for quick loading and unloading the hanks from the unit; h) πotor-driven system for the rotation of the hank carrying reels both in continuous way and, alternatively, in clockwise and anticlockwise senses; i) interchangeable and extrac¬ table hank carrying reels; 1) electro-pneumatic control board for the complete automation of the cycle.

By choosing in advance, both quick and delicate dyeing operations can be carried out with the unit according to the invention.

An execution form is illustrated in the tables 1, 2, 3, 4 and 5. Fig. 1 of table 1 is a view of the truck, fig. 2 is the side view of the unit, while fig. 3 is its front view. In table 2 fig. 4 the dyeing bath distribution can be noted. Figures 5 and 6 are sche atic views of the reel introduction for the quick dyeing method, while fig. 7 represents the disposition for the delicate dyeing.

For the quick dyeing programme, the hanks to be dyed are laid on the extractable reel 1 fitted on a special housing 2 fitted on a mobile truck 3. The above mentioned reel 1 fitted with tongs for facilitating the same hanks dragging, is foreseen with an end part 4 conceived in such a way that, when inserted into the expressly made lodging 5 of the dyeing machine 6, it allows to be kept in rotating movement by means of motor drive 7. Such rotation can be carried out either in clockwise or in anticlockwise sense to avoid the hank snarl, and with adjustable speed according to the diffe¬ rent work requirements. ile the hanks are in operation, the dye¬ ing solution (formed by dye, chemical products and the required quantity of water at the wished temperature) previously prepared in the container 8 foreseen for this purpose and pre-arranqed for all preliminary operations. The above mentioned solution is transferr¬ ed by means of the motor-driven pump 9 which begins also the forc- ed circulation of the dyeing bath through the inkection bored pi¬ pes 10 which throw it one the hanks in movement with a continuous sprinkling. The hanks are then completely wound by the flux of the coloured solution and, from the point of view of dyeing, it is as if they were plunged into the solution itself. The dyeing bath then falls into the collecting tank 11 and, from here, it is quick¬ ly put again in circulation by pump 9 through the bored injecting pipes 10. In the collecting tank 11, another heat exchanger 12 is positioned which anables to increase the temperature according to a progranme established in advance and checked by a pneumatic ^■ val ve 13 controlled by a programming device foreseen for this purpose and fitted in the electro-pneumatic control board. At the cycle end, the reel 1 disengaged frcm the hooking in the motorized point 7, is taken away from dyeing tank 6 by means of the reel carrying truck 3 and, in its stead, a secondo reel already loaded with the new material to dye is set.

For the delicate dyeing progranme, the hanks to dye are fitted on an extractable reel 14, different from reel 1 , and fitted with this last one, into the positioning reel carrier 2 foreseen for this purpose on the mobile truck 3. The reel 14 has been foreseen to act as an eccentric during the rotation phase and, consequently, it shifts the hanks in a soft way from their static position at each complete turn of the reel 14, to allow this operation, its end part 15 has been manufactured so as to receive the turning o tion of the rrotor-driven system 7 after having been fitted into the special housing 5 of the dyeing unit 6. As soon as the eccen^¬ tric reels 14 are fitted into the dyeing tank 6, the hanks are delicately laid down on the bored pipe 5, which acts also as hou^¬ sing for the above mentioned material carrying reel 14, and this can be obtained by turninσ the reel 14 by half revolution and by bringing the same reel into the rest position 16. At this point, by means of the two flux switchtes 17 and 18, the circulation and the forced bath cycle are changed, letting this last one flow no longer to the bored injection pipes 10, but to the cen¬ tral material carrying pipe 5; since that last pipe is fitted 05 with a number of bores in its upper part, it allows the complete spraying of the hanks fitted on it. During the spraying phase, the material remains in static position and is completely wound by the bath flux; at preset intervals, the spray and the forced bath cycle stop and the reel 14 rotation begins; after the end of

110 ccsπplete revolution on itself, the said reel stops, the hanks have been shifted and changed position, and the bath circulation can restart with the flux reactivation to the arm 5. The rotation movement of the reel 14 is slow and, consequently, also the hanks are softly shifted with either a clockwise or anticlockwise rota-

115 tion and viceversa, according to the different operation require¬ ments: these operations are constantly repeated up to the end of the dyeing cycle, which as far as the bath preparation and the other actual dyeing operations are concerned, avails itself of the same special proceedings adopted with the quick proqraπme ex-

12° plained above. At the cycle end, the reel 14 is disconnected from the motor-driven hooking in the motorized point 7 and taken away from the dyeing tank 6 by fitting it into the housing 2 of the mo bile truck 3, and from here the hanks are discharged and transferr_ ©I to the drying section, while into the dyeing unit 6 a second 5 reel is inserted with new hanks to dye.

The present dyeing machinery fitted with arms do not allow such con trivanσes and particularly they do not foresee the possibility of carrying out all the dyeing prograrrmes with only one unit: therefo¬ re re, more machines of different types are required; they do not fo¬ resee the previous outside loading on material carriers and, con¬ sequently,long loading and unloading times for the dyeing machine- ry are required, with obviously limited utilization of the unit; they require a large quantity of water during the dyeing as well as in the washing and cooling phases, thus considerable increas¬ ing the energetic costs and the water employ; at last, they do not allow a shorted proceeding in the dyeing times and, consequent ly, they are less economical and less productive than the proceed ing of the present iπvetion.

Claims

Claims.

1) Improved machine for quick and delicate dyeing of yarn in hanks with short bath and extractable arms, characterized by the fact that for quick dyeing, the hanks to treat are laid on an extracta- ble reel (1) fitted on a housing (2) foreseen for this purpose and inserted on a mobile truck (3) . The above reel (1) , which is finn¬ ed to facilitate hank dragging, is foreseen with an end part (4) so as, when fitted in a special seat (5) of the dyeing^"unit (6) , it allows to it to be kept in rotary motion by means of a motoriza. tion (7) . This rotation can be either clockwise or anticlockwise to avoid the entanglanent of the hanks and with adjustable speed to suit the different work requirements. During the hank movanent, the solution previously prepared in the special container (8) is poured into the dyeing tank (6) . The said solution is transferred by means of a motor-driven pump (9) which begins the forced circu¬ lation of the dyeing bath through bored injecting pipes (10) which throw the dyeing bath on the hanks in movement and spray than com¬ pletely both from their inside and outside. The dyeing bath then falls into a collecting tank (11) and from here it is again put quickly in circulation by a pump (9) through bored injection pipes (10). In the collecting tank (11), a heat exchanger (12) is fitted which enables to increase the temperature according to a progranme established in advance and checked by a pneumatic valve (13) con¬ trolled by a special prograπming device. At the cycle end, after the hooking disconnection in the motorized point (7) , the reel (1) is extracted frc the dyeing tank (6) by means of the reel carrying truck (3) and, in its stead, a secondo reel already charged with sw material is inserted.

2) Improved machine for quick and delicate dyeing of yarn in hanks with short bath and extractable arms, characterized by the fact that for the progranme of delicate dyeing, the hanks to dye are po¬ sitioned on a special reel (14) and inserted with it into the s^pe- cial reel housing (2) of the mobile truck (3). The said reel (14) is foreseen to act also as an excentric during the rotation phase and, consequently, it shifts the hanks in delicate way from their static position at each complete revolution of the reel (14); to enable that, the reel end part (15) is foreseen so as that, when fitted in¬ to the special housing (5) of the dyeing machine (6) , it can recei- ve the turning movement from the motorized system (7) . As soon as the excentric reels (14) have been dipped into the dyeing tank (6) after having been transferred by the truck (3) , the hanks are deli¬ cately laid down on the bored pipe (5) , which acts also as housing for the material carrying reel (14) : this can be obtained by rota- ting the reel (14) by half revolution and by bringing it into rest position (16). At this point, by means of a flux switch (17), the circulation sense of the dyeing bath is changed by letting it flow to the central material pipe (5) ; as this one has a large number of bores in its upper portion, it allows a complete spray of the hanks laid down on it. During this spraying phase, the material remains in static position but completely submerged in the bath: at pre-set and regular intervals, spraying and bath recycling stop, and the reel (14) rotation begins. After one complete revolu tion, this reel stops and the hanks are shifted after having chang- ed their position, and the bath circulation can begin again with reactivation of the flux to the arm (5) . The reel movement during the rotation phase turns out to be slow, therefore, also the hank shift is soft, the motion can be either clockwise or anticlockwise and viceversa, and can include one or more complete reel revolutions (14) . These operations are repeated until the dyeing cycle is end¬ ed, a d at last the reel (14) is disengaged in the motorized point (7) and extracted form the dyeing tank (6) by inserting it into the seat (2) on the mobile truck (3) foreseen for this purpose; from here the hanks are discharαed and sent to drying, while another reel (14) loaded with new hanks to be dyed is fitted into the deying u- nit (6) .

3) Eπproved machine for quick and delicate dyeing of yarn in hanks with short bath and extractable arms, as per claims 1 and 2, cha¬ racterized by the act that the execution of units with more arms is foreseen, thus enabling to increase the production by increas¬ ing the quantity of material dyed in each cycle.

4) Improved machine for quick and delicate dyeing of yarn in hanks with short bath and extractable arms, as per claims 1 and 2, cha- racterized by the fact that many forms of reels are foreseen in or der to suit the different operation requiranents.

5) Improved machine for quick and delicate dyeing of yarn in hanks with short bath and extractable arms, as per claims 1 and 2, cha- racterized by the fact that quick and delicate operations can be carried out according to infinite prograπrnes by changing the spray flux, its pressure, the rotation speed and time, the temperature and times of the dyeing bath.

6) Improved machine for quick and delicate dyeing of yarn in hanks with short bath and extractable arms, as per claims 1 and 2, cha¬ racterized by the fact that in order to avoid the fall of the hanks from the reels or from the arms during the rotation, a mobile bar is foreseen inside and transversally to the dyeinσ tank (6) enabl- ing the hanks to maintain theri position.