CN107435197B

CN107435197B - Vacuum dyeing machine

Info

Publication number: CN107435197B
Application number: CN201710652654.6A
Authority: CN
Inventors: 徐寿春; 丁友新; 龚道进
Original assignee: Zhejiang Shenmeng Leather Technology Co ltd
Current assignee: Zhejiang Shenmeng Leather Technology Co ltd
Priority date: 2017-08-02
Filing date: 2017-08-02
Publication date: 2020-09-11
Anticipated expiration: 2037-08-02
Also published as: CN107435197A; CN110629433A

Abstract

The invention provides a vacuum dyeing machine, and belongs to the technical field of spinning. It has solved technical problem such as current dyeing machine process is complicated, can not dry. The utility model provides a vacuum dyeing machine, this dyeing machine includes the base, the dye vat of barrel form, the dye pond, drip and dye pump and main shaft, the dye vat is fixed to be set up on the base, the main shaft is hollow structure, it is connected with the blowing cylinder to rotate on the dye vat, receive material cylinder and tensioning cylinder, the blowing cylinder, receive material cylinder and tensioning cylinder and link to each other with the dye vat through pivot one, pivot two and pivot three respectively, pivot one, pivot two and pivot three all link to each other with the main shaft is fixed, be provided with a material suction block between blowing cylinder and the material receiving cylinder, set up the material suction hole to treating the dyed cloth on the material suction block, be provided with the evacuating device who carries out the evacuation to the dye vat on the main shaft, be provided with between dye vat and the material receiving cylinder and order about the rotatory drive structure of. The dyeing machine has the advantages that the dyeing machine can be used for dyeing and drying cloth, and the like.

Description

Vacuum dyeing machine

Technical Field

The invention belongs to the technical field of spinning, and relates to a vacuum dyeing machine.

Background

The traditional dyeing machine adopts the modes of dip dyeing, atomization dyeing and the like, and the fabric needs to be dried after being dyed, wherein twice furling is involved, the process is complex, and the efficiency is extremely low.

The dyeing machine is suitable for linen, cotton, rayon and blended seamless underwear, silk stockings, silk and the like, and not only is the fabric damaged, but also the components and the color of the dye are influenced by sundries falling off from the fabric in a stirring mode and the like, and the dyeing quality of the fabric is not favorable.

Disclosure of Invention

The invention aims to provide a vacuum dyeing machine aiming at the problems in the prior art, and the technical problem to be solved by the invention is how to continuously circulate the dye in a smooth manner by vacuumizing, so that dyeing chromatic aberration is avoided, the efficiency is improved, and dyeing and drying are finished at one time.

The purpose of the invention can be realized by the following technical scheme: a vacuum dyeing machine is characterized in that the dyeing machine comprises a base, a cylindrical dyeing vat, a dye pool, a drip dyeing pump and a main shaft, the dye vat is fixedly arranged on the base, the main shaft is of a hollow structure and is connected with a motor, the dye vat is rotatably connected with a feeding roller, a receiving roller and a tensioning roller, the feeding roller, the receiving roller and the tensioning roller are respectively connected with the dye vat through a rotating shaft I, a rotating shaft II and a rotating shaft III, the first rotating shaft, the second rotating shaft and the third rotating shaft are fixedly connected with the main shaft, a material sucking block is arranged between the material discharging roller and the material receiving roller, the material sucking block is provided with a material sucking hole aiming at the cloth to be dyed, the main shaft is provided with a vacuumizing device for vacuumizing the dye vat, and a driving structure which drives the material receiving roller to rotate under the driving of the main shaft is arranged between the dye vat and the material receiving roller.

The vacuumizing device vacuumizes the interior of the dye vat, the main shaft rotates to drive the feeding roller, the receiving roller, the tensioning roller and the material sucking block to synchronously rotate in the dye vat, and meanwhile, under the action of the driving structure, the receiving roller rotates while revolving to roll up the cloth; because the dye is in an approximate vacuum state in the dye vat, the dye is accumulated at the bottom of the dye vat body, is penetrated through the cloth and is drawn out while being vacuumized, and meanwhile, the cloth is penetrated, and when the discharging roller and the receiving roller rotate to leave dye liquid, the dye on the cloth is cleaned and dried by the air flow with the vacuum shaft, so that the aim of quick and efficient dyeing is fulfilled.

In the vacuum dyeing machine, the driving structure comprises a second inner gear ring arranged on the dye vat, and a transmission gear meshed with the second inner gear ring is arranged on the second rotating shaft. When the main shaft rotates, the material receiving roller can be driven to rotate, wherein the material receiving roller drives the cloth to be rolled and discharged under the transmission of the inner gear ring and the transmission gear.

In the above vacuum dyeing machine, the vacuum pumping device includes an inner shaft disposed in a main shaft, a main gear is sleeved on the inner shaft, a driven gear is rotatably connected in the main shaft, an inner gear ring i is disposed on an inner wall of the main shaft, the driven gear is simultaneously engaged with the main gear and the inner gear ring i, an impeller is fixedly disposed on the inner shaft, a through hole is disposed on the main shaft and located right above the tensioning roller, and the through hole penetrates through an inner cavity of the main shaft and the material suction hole; and a cut-off device which shields the through hole when the tensioning roller is positioned at the lowest part of the dye vat is arranged between the through hole and the inner shaft.

Because the dye vat is approximately vacuum, the cloth rotates while being furled in the dye vat, similar to a blade, and a vortex is formed in trace gas in the dye vat, so that the dye entering the dye vat is guided to move from the direction of the dye vat close to the inner wall, and is prevented from directly contacting with the cloth, the explanation is that the vacuumizing in the paper can not realize complete vacuumizing, and the negative pressure can be realized due to the circulation of the dye, so that the air resistance is reduced, the air pollution dye is reduced, and air corrosion parts are reduced, but under the rotation of the cloth, an air flow still exists, the air flow is a forward stage for driving the dye dropping into the dye vat to move towards the direction of the inner wall of the dye vat, so that the dye can be effectively prevented from directly contacting with the cloth, but through the remaining bottom of the dye vat, the cloth penetrates through the suction of the material suction hole, and the dyeing effect is enhanced, and the dye is taken out, and the process is circulated in such a way, so that the dyeing color difference is avoided.

In the above vacuum dyeing machine, the cut-off device includes a T-shaped valve body, the small-diameter end of the valve body is inserted into the through hole, a valve seat is fixedly arranged on the inner wall of the main shaft, a guide hole facing the outer side of the main shaft is formed in the valve seat, a guide post is movably connected in the guide hole, a push block is arranged on the guide post, the push block can be abutted against the large-diameter end of the valve body, and the push block can enable the small-diameter end of the valve body to be inserted into the through hole under the action of gravity.

When the valve body in the dye vat is facing to the through hole, the valve body drops under the influence of gravity and is inserted into the through hole to stop the through hole, so that the dyes are prevented from being vacuumized and extracted when being soaked in the cloth, the dye consumption in one way of circulation is prevented, the dyes can be prevented from being choked and blocked in the through hole, the material suction hole and the inner cavity of the main shaft, and the vacuumizing efficiency is low or ineffective.

In the above vacuum dyeing machine, a tension spring in a compressed state is connected between the inner wall of the guide hole and the guide column.

This extension spring can ensure can be pulled back by the extension spring after the guide post deviates the certain angle of least significant end to switch on the through-hole, make the evacuation stand up and the dyestuff can be discharged.

In the vacuum dyeing machine, the valve body has a notch at the large diameter end, and the push block has a convex surface matching with the notch. The notch is matched with the convex surface, so that the valve body can be prevented from being separated from the push block, and the valve body and the push block are positioned.

In the above vacuum dyeing machine, a distance between an axis of the discharging roller and an axis of the main shaft is equal to a distance between an axis of the receiving roller and an axis of the main shaft, the tensioning roller is located between the discharging roller and the receiving roller, the discharging roller, the receiving roller, the tensioning roller, the absorbing block and parts connected with the discharging roller, the receiving roller, the tensioning roller, the absorbing block and the parts connected with the absorbing block form a rotating body rotating around the main shaft, and a center of gravity of the rotating body is located in a plane where the axis of the main shaft and the axis of the tensioning roller are located.

Whole rotator is the structure of myopia symmetry, can avoid gravity to influence its rotational speed at its rotatory in-process, and in the environment of similar vacuum, its rotation is even steady.

In the above vacuum dyeing machine, the drip-dyeing pump is a small-flow water pump, a dye inlet hole is arranged right above the dyeing vat on the dyeing vat, and the drip-dyeing pump is connected with the dye inlet hole and the dye pool through a hose.

In the above vacuum dyeing machine, the inner cavity of the main shaft is communicated with the dye cell. The dye enters the dye vat from the dye pool and the dripping dyeing pump, then enters the dye pool from the dye vat, and the dye is stirred and mixed in the circulating mode, so that the color difference is avoided, and a filtering device can be arranged in the dye vat to filter impurities remained in the dye.

In the above vacuum dyeing machine, an annular guide groove is formed in the dye vat, the first rotating shaft, the second rotating shaft and the third rotating shaft are inserted into the guide groove, the first follow-up strip located in the guide groove is arranged between the first rotating shaft and the second rotating shaft, the second follow-up strip located in the guide groove is arranged between the first rotating shaft and the third rotating shaft, and the third follow-up strip located in the guide groove is arranged between the second rotating shaft and the third rotating shaft.

The first follow-up strip, the second follow-up strip and the third follow-up strip are matched with the first rotating shaft, the second rotating shaft and the third rotating shaft to fill the guide grooves and form sealing with the dye vat; and transmission components similar to bearings are arranged between the first follow-up strip, the second follow-up strip and the third follow-up strip and the inner wall of the guide groove.

Compared with the prior art, the invention has the following advantages:

1. the vacuumizing device vacuumizes the interior of the dye vat, the main shaft rotates to drive the feeding roller, the receiving roller, the tensioning roller and the material sucking block to synchronously rotate in the dye vat, and meanwhile, under the action of the driving structure, the receiving roller rotates while revolving to roll up the cloth; because the dye is in an approximate vacuum state in the dye vat, the dye is accumulated at the bottom of the dye vat body, is penetrated through the cloth and is drawn out while being vacuumized, and meanwhile, the cloth is penetrated, and when the discharging roller and the receiving roller rotate to leave dye liquid, the dye on the cloth is cleaned and dried by the air flow with the vacuum shaft, so that the aim of quick and efficient dyeing is fulfilled.

2. Because the dye vat is approximately vacuum, the cloth rotates while being furled in the dye vat, similar to a blade, and a vortex is formed in trace gas in the dye vat, so that the dye entering the dye vat is guided to move from the direction of the dye vat close to the inner wall, and is prevented from directly contacting with the cloth, the explanation is that the vacuumizing in the paper can not realize complete vacuumizing, and the negative pressure can be realized due to the circulation of the dye, so that the air resistance is reduced, the air pollution dye is reduced, and air corrosion parts are reduced, but under the rotation of the cloth, an air flow still exists, the air flow is a forward stage for driving the dye dropping into the dye vat to move towards the direction of the inner wall of the dye vat, so that the dye can be effectively prevented from directly contacting with the cloth, but through the remaining bottom of the dye vat, the cloth penetrates through the suction of the material suction hole, and the dyeing effect is enhanced, and the dye is taken out, and the process is circulated in such a way, so that the dyeing color difference is avoided.

3. When the valve body in the dye vat is facing to the through hole, the valve body drops under the influence of gravity and is inserted into the through hole to stop the through hole, so that the dyes are prevented from being vacuumized and extracted when being soaked in the cloth, the dye consumption in one way of circulation is prevented, the dyes can be prevented from being choked and blocked in the through hole, the material suction hole and the inner cavity of the main shaft, and the vacuumizing efficiency is low or ineffective.

Drawings

Fig. 1 is a schematic sectional structure diagram of the present dying machine.

Fig. 2 is a schematic structural view of the present dying machine.

Fig. 3 is an enlarged view of a portion a in fig. 1.

Fig. 4 is a schematic view of a sealing structure between a first rotating shaft, a second rotating shaft, a third rotating shaft and a dye vat in the dyeing machine.

In the figure, 1, a base; 2. a dye vat; 3. a drop dyeing pump; 4. a main shaft; 51. a discharging roller; 52. a material receiving roller; 53. a tension roller; 54. a first rotating shaft; 55. a second rotating shaft; 56. a rotating shaft III; 57. a suction block; 571. a suction hole; 61. a second inner gear ring; 62. a transmission gear; 63. a main gear; 64. an inner shaft; 65. a slave gear; 66. a dye cell; 71. a first inner gear ring; 72. an impeller; 73. a through hole; 74. a valve body; 75. a valve seat; 76. a guide hole; 77. a guide post; 78. a push block; 79. a tension spring; 81. a recess; 82. a convex surface; 91. a guide groove; 92. a first follow-up strip; 93. a second follow-up strip; 94. a follow-up strip III; 95. dye was entered into the wells.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in figure 1, the dyeing machine comprises a base 1, a cylindrical dye vat 2, a dye pool 66, a drop dyeing pump 3 and a main shaft 4, wherein the dye vat 2 is fixedly arranged on the base 1, the main shaft 4 is of a hollow structure, the main shaft 4 is connected with a motor, a discharging roller 51 is rotatably connected on the dye vat 2, the dyeing machine comprises a material collecting roller 52 and a tensioning roller 53, wherein a discharging roller 51, a material collecting roller 52 and a tensioning roller 53 are respectively connected with a dye vat 2 through a rotating shaft I54, a rotating shaft II 55 and a rotating shaft III 56, the rotating shaft I54, the rotating shaft II 55 and the rotating shaft III 56 are fixedly connected with a main shaft 4, a material sucking block 57 is arranged between the discharging roller 51 and the material collecting roller 52, a material sucking hole 571 aiming at a cloth to be dyed is formed in the material sucking block 57, a vacuumizing device for vacuumizing the interior of the dye vat 2 is arranged on the main shaft 4, and a driving structure for driving the material collecting roller 52 to rotate under the driving of the main shaft 4 is arranged between the dye vat 2 and the material collecting roller.

The vacuumizing device vacuumizes the interior of the dye vat 2, the main shaft 4 rotates to drive the discharging roller 51, the receiving roller 52, the tensioning roller 53 and the material sucking block 57 to synchronously rotate in the dye vat 2, and meanwhile, under the action of the driving structure, the receiving roller 52 rotates while revolving to roll up the cloth; because the dye is approximately in a vacuum state in the dye vat 2, the dye is accumulated at the bottom of the dye vat body, is penetrated through the cloth and is drawn out while being vacuumized, and meanwhile, the cloth is penetrated, when the discharging roller 51 and the receiving roller 52 rotate to leave dye liquid, the dye on the cloth is cleaned and dried by the air flow with the vacuum shaft, and therefore the purpose of rapid and efficient dyeing is achieved.

As shown in fig. 2, the driving structure comprises a second internal gear ring 61 arranged on the dye vat 2, and a transmission gear 62 meshed with the second internal gear ring 61 is arranged on the second rotating shaft 55; when the main shaft 4 rotates, the receiving roller 52 can be driven to rotate, wherein the receiving roller 52 drives the cloth to be wound and discharged under the transmission of the internal gear ring and the transmission gear 62.

As shown in fig. 1 and 3, the vacuum pumping device includes an inner shaft 64 disposed in the main shaft 4, the inner shaft 64 is sleeved with a main gear 63, the main shaft 4 is rotatably connected with a driven gear 65, the inner wall of the main shaft 4 is provided with a first internal gear 71, the driven gear 65 is simultaneously engaged with the main gear 63 and the first internal gear 71, the inner shaft 64 is fixedly provided with an impeller 72, the main shaft 4 is provided with a through hole 73 located right above the tension roller 53, and the through hole 73 penetrates through an inner cavity of the main shaft 4 and a material suction hole 571; a cut-off device which shields the through hole 73 when the tensioning roller 53 is positioned at the lowest part of the dye vat 2 is arranged between the through hole 73 and the inner shaft 64; because the inside of the dye vat 2 is approximately vacuum, the cloth rotates while being reeled in the dye vat 2, similar to a blade, and a vortex is formed in a trace amount of gas in the dye vat 2, so that the dye entering the dye vat 2 is guided to move from the direction of the dye vat 2 close to the inner wall, so that the direct contact of the dye with the cloth is avoided, it needs to be explained here that the vacuumizing in the text cannot realize complete vacuumizing, and because of the circulation of the dye, the negative pressure can be realized, so that the air resistance is reduced, the air pollution of the dye is reduced, and the air corrosion of parts is reduced, however, under the rotation of the cloth, an air flow still exists, which is a forward lift for driving the dye dropping into the dye vat 2 to move towards the direction of the inner wall of the dye vat 2, so that the dye can be effectively prevented from directly contacting with the cloth, but is sucked through a material sucking hole 571 through the bottom of the reserved dye vat 2, penetrate through the cloth, enhance the dyeing effect, and take out the dye, so as to circulate and avoid dyeing color difference.

As shown in fig. 3, the cut-off device includes a T-shaped valve body 74, the small diameter end of the valve body 74 is inserted into the through hole 73, a valve seat 75 is fixedly disposed on the inner wall of the main shaft 4, a guide hole 76 facing the outer side of the main shaft 4 is formed in the valve seat 75, a guide post 77 is movably connected in the guide hole 76, a push block 78 is disposed on the guide post 77, the push block 78 can abut against the large diameter end of the valve body 74, and the push block 78 can enable the small diameter end of the valve body 74 to be inserted into the through hole 73 under the action of gravity; when the valve body 74 in the dye vat 2 faces the through hole 73, the valve body 74 drops under the influence of gravity and is inserted into the through hole 73 to stop the through hole 73, so that the dyes are prevented from being vacuumized and extracted when the dyes soak the cloth, the dye consumption in a single circulation way is prevented, the dyes are prevented from choking and blocking the through hole 73, the material suction hole 571 and the inner cavity of the main shaft 4, and the vacuumizing efficiency is low or ineffective.

A tension spring 79 in a compressed state is connected between the inner wall of the guide hole 76 and the guide post 77; the tension spring 79 can ensure that the guide post 77 can be pulled back by the tension spring 79 after deviating from the lowest end by a certain angle, so that the through hole 73 is communicated, and the vacuumizing is started and the dye can be discharged; the valve body 74 has a notch 81 on the large diameter end, and the push block 78 has a convex surface 82 matching with the notch 81; the notch 81 and the convex surface 82 cooperate to prevent the valve body 74 from disengaging from the push block 78, thereby positioning the two.

The distance between the axis of the discharging roller 51 and the axis of the main shaft 4 is equal to the distance between the axis of the receiving roller 52 and the axis of the main shaft 4, the tensioning roller 53 is positioned between the discharging roller 51 and the receiving roller 52, the discharging roller 51, the receiving roller 52, the tensioning roller 53, the material absorbing block 57 and parts connected with the discharging roller, the receiving roller 52, the tensioning roller 53 and the material absorbing block 57 form a rotating body rotating around the main shaft 4, and the gravity center of the rotating body is positioned in the plane where the axis of the main shaft 4 and the axis of the tensioning roller 53 are positioned; whole rotator is the structure of myopia symmetry, can avoid gravity to influence its rotational speed at its rotatory in-process, and in the environment of similar vacuum, its rotation is even steady.

The drop dyeing pump 3 is a small-flow water pump, a dye inlet hole 95 is formed in the dye vat 2 and located right above the dye vat 2, and the drop dyeing pump 3 is connected with the dye inlet hole 95 and the dye pool 66 through a hose; the inner cavity of the spindle 4 is communicated with the dye cell 66; the dyestuff is by dye cell 66 and drip dye pump 3 entering dye vat 2, gets into dye cell 66 by dye vat 2 again, and circulation such as this is stirred the mixture to the dyestuff, avoids the colour difference, can set up filter equipment in dye cell 66, filters remaining impurity in the dyestuff.

As shown in fig. 4, an annular guide groove 91 is formed in the dye vat 2, the first rotating shaft 54, the second rotating shaft 55 and the third rotating shaft 56 are inserted into the guide groove 91, a first follow-up strip 92 positioned in the guide groove 91 is arranged between the first rotating shaft 54 and the second rotating shaft 55, a second follow-up strip 93 positioned in the guide groove 91 is arranged between the first rotating shaft 54 and the third rotating shaft 56, and a third follow-up strip 94 positioned in the guide groove 91 is arranged between the second rotating shaft 55 and the third rotating shaft 56; the first follow-up strip 92, the second follow-up strip 93 and the third follow-up strip 94 are matched with the first rotating shaft 54, the second rotating shaft 55 and the third rotating shaft 56 to fill the guide groove 91 and form sealing with the dye vat 2; and bearing-like transmission assemblies are arranged between the first follow-up strip 92, the second follow-up strip 93 and the third follow-up strip 94 and the inner wall of the guide groove 91.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. A vacuum dyeing machine is characterized by comprising a base (1), a barrel-shaped dyeing vat (2), a dye pool (66), a drop dyeing pump (3) and a main shaft (4), wherein the dyeing vat (2) is fixedly arranged on the base (1), the main shaft (4) is of a hollow structure, the main shaft (4) is connected with a motor, a discharging roller (51), a receiving roller (52) and a tensioning roller (53) are rotatably connected to the dyeing vat (2), the discharging roller (51), the receiving roller (52) and the tensioning roller (53) are respectively connected with the dyeing vat (2) through a first rotating shaft (54), a second rotating shaft (55) and a third rotating shaft (56), the first rotating shaft (54), the second rotating shaft (55) and the third rotating shaft (56) are fixedly connected with the main shaft (4), and a absorbing block (57) is arranged between the discharging roller (51) and the receiving roller (52), the cloth dyeing machine is characterized in that the material absorption block (57) is provided with a material absorption hole (571) for cloth to be dyed, the main shaft (4) is provided with a vacuumizing device for vacuumizing the dye vat (2), and a driving structure for driving the material receiving roller (52) to rotate under the driving of the main shaft (4) is arranged between the dye vat (2) and the material receiving roller (52); the drip dyeing pump (3) is a small-flow water pump, a dye inlet hole (95) is formed in the dye vat (2) and located right above the dye vat (2), and the drip dyeing pump (3) is connected with the dye inlet hole (95) and the dye pool (66) through a hose.

2. A vacuum dyeing machine according to claim 1, characterized in that said driving structure comprises a second internal gear (61) arranged on the dyeing vessel (2), said second rotating shaft (55) being provided with a transmission gear (62) engaged with said second internal gear (61).

3. A vacuum dyeing machine according to claim 2, characterized in that said vacuum-pumping device comprises an inner shaft (64) arranged inside the main shaft (4), said inner shaft (64) is sleeved with a main gear (63), said main shaft (4) is rotatably connected with a driven gear (65), said main shaft (4) has a first internal gear (71) on its inner wall, said driven gear (65) is simultaneously engaged with said main gear (63) and said first internal gear (71), said inner shaft (64) is fixedly provided with an impeller (72), said main shaft (4) is provided with a through hole (73) located right above the tension roller (53), said through hole (73) penetrates through the inner cavity of said main shaft (4) and the material suction hole (571); a cut-off device which can shade the through hole (73) when the tensioning roller (53) is positioned at the lowest part of the dye vat (2) is arranged between the through hole (73) and the inner shaft (64).

4. A vacuum dyeing machine according to claim 3, characterized in that said cut-off device comprises a T-shaped valve body (74), the small diameter end of said valve body (74) is inserted in said through hole (73), a valve seat (75) is fixedly arranged on the inner wall of said main shaft (4), a guide hole (76) facing the outer side of said main shaft (4) is arranged on said valve seat (75), a guide post (77) is movably connected in said guide hole (76), a push block (78) is arranged on said guide post (77), said push block (78) can abut against the large diameter end of said valve body (74), and said push block (78) can insert the small diameter end of said valve body (74) in said through hole (73) under the action of gravity.

5. A vacuum dyeing machine according to claim 4, characterized in that a tension spring (79) in compression is connected between the inner wall of said guide hole (76) and the guide column (77).

6. A vacuum dyeing machine according to claim 5, characterized in that said valve body (74) has a notch (81) on the large diameter end and said push block (78) has a convex surface (82) cooperating with said notch (81).

7. A vacuum dyeing machine according to claim 6, characterized in that the distance from the axis of the emptying drum (51) to the axis of the main shaft (4) is equal to the distance from the axis of the collecting drum (52) to the axis of the main shaft (4), the tensioning drum (53) is located between the emptying drum (51) and the collecting drum (52), the emptying drum (51), the collecting drum (52), the tensioning drum (53), the suction block (57) and the parts connected therewith constitute a rotating body rotating around the main shaft (4), and the center of gravity of the rotating body is located in the plane of the axis of the main shaft (4) and the axis of the tensioning drum (53).

8. A vacuum dyeing machine according to claim 1, characterized in that the internal cavity of said main shaft (4) communicates with said dye cell (66).

9. A vacuum dyeing machine according to claim 8, characterized in that said vat (2) is provided with an annular guide groove (91), said first (54), second (55) and third (56) shafts being inserted in said guide groove (91), a first follower bar (92) being arranged in said guide groove (91) between said first (54) and second (55) shafts, a second follower bar (93) being arranged in said guide groove (91) between said first (54) and third (56) shafts, and a third follower bar (94) being arranged in said guide groove (91) between said second (55) and third (56) shafts.