CN110914620A - Machine and method for drying and treating fabrics - Google Patents
Machine and method for drying and treating fabrics Download PDFInfo
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- CN110914620A CN110914620A CN201880031585.XA CN201880031585A CN110914620A CN 110914620 A CN110914620 A CN 110914620A CN 201880031585 A CN201880031585 A CN 201880031585A CN 110914620 A CN110914620 A CN 110914620A
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- fabric
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
- F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
- F26B13/14—Rollers, drums, cylinders; Arrangement of drives, supports, bearings, cleaning
- F26B13/16—Rollers, drums, cylinders; Arrangement of drives, supports, bearings, cleaning perforated in combination with hot air blowing or suction devices, e.g. sieve drum dryers
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
- D06B15/00—Removing liquids, gases or vapours from textile materials in association with treatment of the materials by liquids, gases or vapours
- D06B15/04—Removing liquids, gases or vapours from textile materials in association with treatment of the materials by liquids, gases or vapours by suction
- D06B15/043—Removing liquids, gases or vapours from textile materials in association with treatment of the materials by liquids, gases or vapours by suction by means of a perforated drum
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C7/00—Heating or cooling textile fabrics
- D06C7/02—Setting
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
The present invention relates to a machine for drying and shrinking a continuous fabric, comprising: a processing chamber; a transport path for continuously transporting the fabric into the processing chamber; an air heating device capable of heating and moving air; a plurality of moving and drying devices for moving and drying fabrics, arranged in series along a transport path within a treatment chamber, each device comprising: a rotating roller provided with an inner cavity and a cylindrical surface provided with a plurality of channels towards the inner cavity, the rotating roller being able to be partially wound by the fabric being conveyed so that said roller carries the fabric with itself when rotating; a hot air diffuser operatively connected to the delivery tube of the air heating means and arranged in the vicinity of the roller in the fabric winding area; suction means for sucking air from inside the roll towards outside the treatment chamber, so that air from one respective hot air diffuser is sucked from the space between the hot air diffuser and the roll towards the inside of the roll, through the channels provided on the cylindrical surface of the roll and then through the fabric provided on the roll; a vibrating basin for each pair of successive moving means, on which the fabric moving between the two successive moving means can be placed.
Description
Technical Field
The present invention relates to a machine for treating fabrics; in particular, the object of the present invention is a machine for drying and shrinking fabrics, preferably, though not exclusively, knitted fabrics. It is another object of the present invention to provide a method for drying and shrinking fabrics, which are preferably, although not limited to, knitted fabrics.
Background
Various methods and apparatuses are known today for continuously drying fabrics.
For example, machines are known which comprise a large oven with a chamber in which the fabric moves and slides forward, is suspended at the upper part on controlled rolls and at the lower conveying part in free folds. The fabric dries gradually and slowly in the chamber filled with hot air.
Another machine provides a number of fluid-heated rolls over which the fabric is continuously moved; the fabric partially surrounds the fluid heated roll and is thus heated and dried.
Moreover, machines are known in which the fabric is conveyed through a series of hot air blowers, resting on one or more conveying conveyors which move it to an outlet.
At the same time, it is important not only to dry the fabric, but also to process the fabric to provide dimensional stability to the fabric, which is important for producing the final product, providing it with bulk and a soft touch.
Currently, the discontinuous cord method is used to obtain knitted fabrics with dimensional stability and soft touch, which is implemented in tumblers similar to those used in laundry.
There are also continuous rope treatments, which however have some drawbacks due to the formation of folds and knots in the fabric. In addition, as also in the discontinuous cord method, the treated fabric must be subjected to a cord opening treatment by a specific machine in order to re-stretch the fabric. Moreover, continuous rope handling is very expensive from an energy consumption point of view.
Some treatment machines are provided for inserting the fabric into a chamber where the fabric is vibrated to allow the fabric to contract. However, the shrinkage and bulkiness of the obtained fabric are not satisfactory.
There is also a machine for transferring the fabric into a chamber where the fabric moves through a water bath and vibrating rollers where water is sprayed so that there is wet steam in the chamber. Also in this case, the shrinkage and bulkiness of the fabric obtained are not satisfactory.
All known machines do not allow to obtain a satisfactory level of drying of the fabric and at the same time shrinkage and softness.
Disclosure of Invention
The aim of the present invention is to provide a machine for continuously drying and shrinking fabrics, in particular, though not exclusively, knitted fabrics, which is capable of obtaining an optimal shrinkage while obtaining an optimal bulk and soft touch of the fabric during its drying.
Another object of the present invention is to provide a method for continuously treating a fabric, preferably a knitted fabric, which allows to obtain an optimal shrinkage while obtaining an optimal bulkiness and soft feel of the fabric during the drying thereof.
These and other objects, which will be better described hereinafter, are achieved by a machine for continuously drying and shrinking fabrics, comprising:
-a treatment chamber having a treatment chamber,
a transport path for continuously transporting the fabric into the treatment chamber,
-air heating means adapted to heat and move air towards the fabric,
-a plurality of moving and drying devices for moving and drying the fabric, arranged in series along said transport path inside the treatment chamber, each moving and drying device comprising
A motorized rotating dryer roll provided with an inner cavity and a cylindrical surface provided with a plurality of channels facing the inner cavity, the rotating dryer roll being adapted to be partially wound with a conveyed fabric, such that the rotating dryer roll carries the fabric with itself when rotating,
or a hot air diffuser, operatively connected to the delivery tube of the air heating means, and arranged in the vicinity of the roller in the fabric winding zone,
or suction means for sucking air from inside the roll towards the outside of the treatment chamber, so that the air from each diffuser is sucked from the space between the diffuser and the roll towards the inside of the roll, through the channels provided on the cylindrical surface of the roll and then through the fabric arranged on the roll, to dry the fabric,
a vibrating bath for each pair of successive moving means, on which the fabric moving between two successive moving means can be placed.
The machine allows to combine a gradual uniform drying of the fabric with shrinkage and volumization of the fabric, while obtaining a soft touch. Conveniently, the fabric enters the machine while still locally wet (e.g. humidity, i.e. moisture 20% -22%); the fabric is then dried uniformly along its path (e.g., until 0% moisture or completely dry); moreover, due to the vibrating bath, there is a simultaneous shrinking effect on the fabric when it is no longer completely wet nor completely dry. The rollers arranged in series allow an optimal uniform drying and do not form any defects in the web transport direction due to the surface distribution of the web on the cylindrical surface of the rollers.
The fabric is preferably conveyed continuously in the open width direction, i.e. in the non-rope direction, i.e. the fabric is distributed evenly and is not wound upon itself in the longitudinal direction. Suitably, the fabric may be delivered in an open manner (i.e. the fabric has two side edges) or in a tubular manner (i.e. the fabric forms a tube, i.e. the side edges of the fabric are joined together).
The machine is preferably provided with control means for controlling the amount of moisture in the fabric entering the machine. Suitably, said control means confirm whether the moisture in the fabric is comprised between 10% and 40%, more preferably between 15% and 30%, even more preferably between 18% and 25%. Moisture is measured as a percentage of the mass of water to the weight of the dried material. The measurement is performed, for example, by a probe roller connected to an electronic device that measures the resistance of the fabric, thus determining the moisture level of the fabric.
Suitably, the machine is provided with electronic means for controlling, governing and braking the same machine. The electronic device may be adapted to control one or more of the following parameters: the weight of the fabric in the one or more vibrating baths, the moisture of the fabric entering the machine, the moisture of the fabric exiting the machine, the moisture at one or more intermediate locations in the fabric transport path, the roll rotation speed, the air heating temperature, the temperature of the air exiting toward the diffuser, the flow rate of the heated air exiting the roll.
According to a preferred embodiment, the gas heating means comprise a heating space in which are arranged heating means, at least one air inlet for air entering the heating space, and at least one heated air delivery opening; preferably, an air filter is provided, which is arranged on the air inlet.
The heating means may for example be a burner, the space with the burner thus being a combustion chamber. In other embodiments, the heating device may be a steam heat exchanger or a diathermic oil heat exchanger or a different heat exchanger through which air from the chamber should pass before moving towards the diffuser.
The heating space may be provided inside the process chamber (e.g. below the area occupied by the rollers) or arranged outside the main wall of the process chamber but in communication with the process chamber.
Thus, the at least one air inlet for letting air into the heating space suitably connects the inside of the process chamber with the inside of the heating space.
The air heating means are set to heat the air (preferably as it leaves the diffuser) to a temperature comprised between 60 ℃ and 120 ℃, preferably comprised between 70 ℃ and 110 ℃, more preferably comprised between 80 ℃ and 100 ℃. The temperature sensor may for example be arranged near the outlet of the diffuser.
The air heating means preferably comprise a duct operatively connected at one end to at least one delivery opening of the heating space and at the other end to a respective hot air diffuser, at least one moving device (for example a suction machine, a fan, etc.) being provided for moving air from the heating space towards the diffuser.
According to a preferred embodiment, the suction means adapted to suck air from the inside towards the outside of the roller comprise a discharge duct operatively connected at one end to the inside of the roller and at the other end to a discharge duct adapted to let the air sucked by the roller exit outside the treatment chamber, at least one moving device (such as a suction, a fan, air, an air extractor, a turbine, etc.) being provided for moving the air from the roller towards the discharge duct. Preferably, a common single discharge pipe is provided for each discharge pipe for discharging air from each roll; preferably, an air moving device is provided which is connected to the common exhaust duct.
According to a preferred embodiment, the suction means adapted to suck air from the inside towards the outside of the roll comprise means for varying the amount of air sucked by the roll. These means may for example comprise a regulator for regulating the speed of the rotor of the moving device or for regulating the outlet cross section of the discharge duct leaving the roller. The means for varying the amount of air drawn by the roller comprise, for example, a deflection device, such as a deflection valve, for deflecting the air leaving the roller. Preferably, a deflection means is provided for each discharge pipe.
According to a preferred embodiment, the machine comprises means for varying the amount of air supplied by the diffuser. These means may for example comprise a regulator for regulating the speed of the rotor of the mobile device or for regulating the outlet cross section of the inlet duct to the diffuser.
According to a preferred embodiment, the machine comprises an inlet vibrating basin arranged upstream of the first moving and drying means spanned by the fabric.
According to a preferred embodiment, the machine comprises an outlet vibrating basin arranged downstream of the first moving and drying means spanned by the fabric.
In the vibrating bath, the fabric is suitably arranged in folds.
According to a preferred embodiment, upstream of each rotating roller, a centering and stretching device is provided for correctly centering and stretching the fabric T on the roller.
The basic structure provides the machine with two rollers and an intermediate vibrating pool located between the two rollers (no optional inlet and outlet pools are considered, even though inlet and outlet pools are preferred).
Other preferred configurations provide a larger number of rollers, such as three rollers and two intermediate vibratory pools disposed between the two rollers, or four rollers and three intermediate vibratory pools, or five rollers and four intermediate vibratory pools, etc.
The larger the number of rolls, the better the uniformity of drying, and the better the shrinkage and volumization.
In a preferred embodiment, the number of pools is one more than the number of rollers, the number of pools being the number of inlet and outlet pools plus the number of intermediate pools arranged between the rollers.
The vibrating basin of the machine is preferably inclined downwards from the top in the direction of transport of the fabric.
According to a preferred embodiment, the inclination adjustment means are associated with one or more vibrating cells for adjusting the inclination of the respective vibrating cell; thus, by increasing and decreasing the downward slope in the web transport direction, the speed at which the folded web slides into the pool is increased or decreased.
According to a preferred embodiment, the machine comprises means for varying the rotation of the roller, for example by varying the speed of rotation of the rotor of a motor associated with the roller or by varying the gear ratio in the case where the mobile part of the roller is connected to the roller not directly but by a suitable mechanism.
According to a preferred embodiment, the machine comprises a continuous web transport device, located inside or outside the treatment chamber, suitably immediately upstream of the first vibrating pool on the web transport path.
According to a preferred embodiment, the machine comprises a continuous fabric take-off device, located inside or outside the treatment chamber, suitably immediately downstream of the first vibrating basin on the fabric transport path.
According to a preferred embodiment, the machine comprises means for evaluating the moisture of the fabric placed in the bath. These devices preferably comprise measuring devices for measuring the weight of the fabric in the tank.
A machine according to one or more of the above constructions includes a sequence of operations.
As mentioned above, the machine is suitably provided with electronic means for controlling, managing and actuating the same machine. In this electronic device, an operating program is set for the operation of the machine, which operating program comprises, in sequence and in succession, for each successive fabric portion of the continuous fabric delivered to the machine the following steps:
a) the fabric portion is conveyed to the treatment chamber, for example by a continuous fabric conveyor for conveying the fabric to the machine, with a moisture content comprised between 10% and 40%, more preferably between 15% and 30%, even more preferably between 18% and 25%,
b) the web portion is vibrated in a vibrating basin, preferably inclined downwardly from the top in the web transport direction,
c) passing hot air through the fabric portion, partially winding it on a rotating perforated roller, the temperature of the air being comprised between 60 ℃ and 120 ℃, preferably between 70 ℃ and 110 ℃, and more preferably between 80 ℃ and 100 ℃,
d) repeating the sequence of steps b) -c) -b) for the fabric portion one or more times, depending on the number of rolls and intermediate vibrating baths provided,
e) the removal of the fabric portion from the treatment chamber, for example by means of a continuous take-off device for taking the fabric from the machine, has a residual moisture comprised between 4% and 0%, more preferably comprised between 2% and 0%, even more preferably equal to about 0%.
The electronic means preferably allow to regulate the amount of hot air passing through the fabric portion.
The electronic means preferably allow to adjust the roller speed, the speed of the fabric passing through the treatment chamber (more generally the transport speed), i.e. the time of passage through the treatment chamber.
According to another aspect, the present invention relates to a method for drying and shrinking a continuous fabric, comprising, for each consecutive portion of fabric, sequentially and continuously performing the following steps:
a) the fabric portion is conveyed to the drying and shrinking area with a moisture content comprised between 10% and 40%, more preferably between 15% and 30%, even more preferably between 18% and 25%,
b) the portion of the fabric is vibrated,
c) at least partially drying the fabric portion, passing hot air through the fabric, and preferably moving the fabric by resting in rotation on a cylindrical surface, the temperature of the air being comprised between 60 ℃ and 120 ℃, preferably between 70 ℃ and 110 ℃, more preferably between 80 ℃ and 100 ℃,
d) repeating the sequence of steps b) -c) b) one or more times for the fabric portion,
a) the residual moisture is comprised between 4% and 0%, more preferably between 2% and 0%, even more preferably equal to about 0%, of the fabric portion removed from the drying and shrinking zone.
The method preferably includes the step of regulating the amount of heated air passing through the fabric portion.
The method preferably includes the step of adjusting the speed of conveyance of the web through the drying and shrinking zone.
During vibration, the fabric portion preferably accumulates in a folded form.
Drawings
Further characteristics and advantages of the invention will become better apparent from the description of a preferred but not exclusive embodiment, illustrated by way of non-limiting example in the list of the accompanying drawings, in which:
figure 1 is a schematic side view of a machine according to the invention,
fig. 2 shows a variant of the machine of fig. 1.
Detailed Description
With reference to the figures, a machine for continuously drying and shrinking fabrics is indicated with 10.
The machine comprises a treatment chamber 11 with a wall 12 inside which a continuous transport path for the fabric T is provided.
As described below, a plurality of alternating stations are provided along the transport path for vibrating the fabric and impinging the fabric with hot air.
As better indicated hereinafter, the continuous web T with a given moisture level is continuously conveyed into the treatment chamber by means of a conveying device 13, comprising for example a calender with drawing rollers.
The continuous fabric is laid open width (i.e. not cabled) and is preferably unwound (alternatively it may be a tubular continuous fabric).
A first vibrating basin 14, also called inlet basin, is arranged immediately downstream of the input device 13 and at a lower level than the input device, so that the conveyed fabric falls towards the vibrating basin 14. In the vibrating basin, the fabric accumulates in a folded form.
The vibration tank 14 is inclined downward from the top in the fabric conveying direction f.
An adjusting device, not specifically shown in the figures, is provided for adjusting the inclination of the tank, so as to be able to increase or decrease the sliding of the fabric into the tank (by combining the vibration and the inclination, the fold of fabric is moved slidingly forward along the vibrating tank).
A vibrating bath is a bath to which a vibrating means, not specifically shown in the figures, is connected, the vibrating means being for example an actuator for reciprocating motion or a rotor with an eccentric constrained to or in contact with the bath. The vibration of the pool allows the knitted fabric to contract.
At the end of the tank opposite to the fabric inlet area and above the level of the same tank, a first centring and spreading device 15 is provided for correctly centring and spreading the fabric T in the next station, constituted by a first moving and drying device 16' arranged above the centring and spreading device 15, as described below.
A second vibrating basin 17, also called intermediate vibrating basin, is arranged immediately downstream of the first moving and drying means 16', substantially similar to the first vibrating basin 14 and also having a variable inclination.
At the end of the second vibrating basin 17 opposite to the inlet area of the fabric and above the level of the same second vibrating basin, a second centering and stretching device 18 is provided for correctly centering and stretching the fabric T in the next station, constituted by the second moving and drying device 16 ", as described below.
A third vibrating basin 20, also called the exit vibrating basin, is arranged immediately downstream of the second moving and drying means 19, substantially similar to the other vibrating basins 14 and 17 and also with variable inclination.
Downstream of the third vibrating pool 20, a continuous fabric take-off device 21, such as a pulling roll, is provided for removing the fabric from the machine.
Each moving and drying means 16 comprises a motorized drying rotating roller 22 provided with an inner cavity 23 and with a cylindrical surface 24, the cylindrical surface 24 being provided with a plurality of channels, suitably in the form of through holes 25, facing the inner cavity 23.
The fabric T coming from the centring and spreading device 15 or 18 is partially wound on the upper portion of the roller 22, so that the roller 22 carries with it the fabric and dries it when rotating, as will be described below.
A hot air diffuser 26 is arranged above the roller 22 and close to it in the region in which the fabric is wound; the diffuser is operatively connected to the delivery conduit of the air heating means 27 described below. A space 28 is provided between the diffuser 26 and the cylindrical surface 24 of the roller 22.
The suction means 29 are provided for sucking air from the inner cavity 23 of the roller 22 towards the outside of the treatment chamber 11, so as to suck hot air from the respective diffusers 26 from the space 28 towards the inside of the roller 22, passing the hot air through the through holes 25 and therefore through the fabric T arranged on the roller, thus drying the fabric.
The roller 22 suitably rotates on a lower carriage, which covers the lower hole of the roller 22; the air is thus sucked through uncovered holes provided on the upper part of the roller 22, i.e. on the part of the roller surrounded by fabric.
The suction means 29 comprise, for example, a discharge duct 30 operatively connected at one end to the inner cavity 23 of the roller 22 and at the other end to a discharge duct 31 suitable for letting out the air sucked by the roller 22 outside the treatment chamber 11. For this purpose, air moving means 32 are provided, such as suction, fans, suction, turbines, etc., for moving the air from the roller 22 towards the discharge duct 31.
It is preferable to provide a common single discharge duct 31 for each air discharge duct 30 for discharging air from each roller 22. Suitably, a single air moving device 32 is provided, which is connected to the common exhaust duct 31.
The suction means 29 comprise means for varying the amount of air sucked by the roller 22. These means of variation comprise, for example, a regulator for regulating the outlet cross section of the discharge ducts 30 leaving the roller 22, such as an air deflection device 33 for deflecting the air leaving the internal cavity 23 of the roller 22, such as deflection valves (one for each discharge duct) arranged in the discharge ducts 30.
The means for varying the amount of air sucked by the roller 22 may comprise a regulator for regulating the speed of the rotor of the air moving device 32 moving the air from the roller 22 towards the discharge duct 31, which regulator may be used instead of the above-mentioned deviation means 33 or in combination with the above-mentioned deviation means 33.
The air heating means 27 comprise a heating space 34, preferably housed inside the treatment chamber 11, inside which the following are arranged: a burner 35; an air inlet 36 for allowing air to enter the heating space 34, to which a filter 36A is connected and which connects the inside of the chamber 11 with the inside of the heating space 34; and a heated air delivery opening 37.
The duct 38 is operatively connected at one end to the delivery opening 37 and at the other end to the respective hot air diffuser 26. An air moving device 39, such as a suction machine, a fan, etc., is connected to the duct 38 for moving air from the heated space 34 towards the diffuser 26.
As mentioned above, the machine is suitably provided with electronic means, not shown in the figures for the sake of simplicity, for controlling, managing and actuating the same machine. In this electronic device, an operating program is provided for the operation of the machine, which operating program comprises the following steps, in sequence and in succession, for each successive portion of the continuous fabric T fed into the machine, considering the continuous and sequential movement of the fabric T through the above-mentioned treatment stations from the feeding device 13 to the take-off device 21.
First, when the machine is closed, the fabric T is brought into the machine in a starting configuration, i.e. the fabric is folded in a bath and wound on rolls, for example the number of fabrics in the machine is comprised between 40m and 110 m.
A portion of the fabric T is conveyed into the machine from the outside of the treatment machine by means of a conveying device 13. The moisture content of the incoming fabric portion is comprised between 18% and 25%, preferably between about 20% and 22%. The machine comprises means for controlling the moisture level of the fabric entering the machine, which are not shown in the figures. For the purpose of assessing the moisture level, the machine may also comprise means for assessing the moisture level in one or more of the tanks, such as measuring devices, not shown in the figures, for measuring the weight of the fabric T in the tanks 14, 17, 20, or probe rollers connected to electronic equipment to measure the resistance of the fabric T and thus determine the moisture level of the fabric, or any other means.
The fabric portion delivered to the machine is made to oscillate in a first oscillating tank 14, in which the fabric is collected folded.
Subsequently, said portion of fabric T reaches the first rotating roller 22 from the first vibrating bath 14, the upper portion of which is surrounded by the fabric, which is thus placed on the cylindrical surface of the first rotating roller. Here, the fabric is hit by the hot air from the diffuser 26.
The hot air comes from a heating space 34 where the air is heated by means of a burner 35. Due to the air moving device 39, air is sucked into the heating space through the filter and the inlet 36. In the heating space, the air is heated by the burner 35; the air moving device 39 causes the heated air to exit the delivery opening 37 and pass through the duct 38 to the diffuser 26.
The operation of the burner is controlled so that the temperature of the hot air leaving the diffuser is comprised between 80 ℃ and 100 ℃.
Hot air is drawn from the diffuser 26 through the holes in the cylindrical surface of the roll 22 into the internal cavity 23 of the roll 22 by means of the air-moving device 32, which draws the hot air through the portion of fabric T on the roll.
Again thanks to the device 32, the sucked air is made to pass through the pipes 30 and 31 to the outside of the chamber 11.
As the fabric T is recessed in the internal cavity 23 due to the air suction, it remains adhered to the cylindrical surface of the roller 22 and is pulled by the rotating roller 22. The rolls 22 draw the fabric into the machine.
The speed at which the roller 22 rotates preferably corresponds substantially to the overall conveying speed of the fabric T through the machine (i.e. also to the speed at which the fabric T enters and leaves the machine), for example a speed comprised between 7 and 14 metres/minute, more preferably comprised between about 9 and 11 metres/minute. However, the speed may be set and controlled by means of the electronics for governing the machine.
Subsequently, this portion of fabric T is vibrated again in sequence and is crossed by hot air several times, equal to the number of rollers provided in the machine. In this example, the portion of fabric T falls into a vibrating bath (intermediate bath 17) in which it is made to vibrate according to what has been described above; the fabric is then removed to pass through the second centring and stretching device 18 and to the second roller 22, where it is treated and moved according to what has been described above.
This portion of the fabric T drops from the second roll into the final vibrating tank 20, in which the fabric is vibrated, similar to what has been described for the preceding tanks. From this bath, the portion of fabric is removed from the machine by the roller 21, with a residual moisture preferably equal to about 0%. Immediately downstream of the last drying roller 22, this substantially zero level of moisture is suitably obtained.
Obviously, the moisture level of the fabric is constantly decreasing before each vibration cell.
The electronic means also allow to regulate the amount of hot air reaching the diffuser, for example by varying the speed of the air moving means 39, or by varying the cross section of the duct through which the hot air passes in order to face the diffuser, or by varying the amount of air sucked by the rollers.
In this example, only two moving and drying devices 16' and 16 "are provided for moving and drying the fabric. It is clear that, according to specific requirements, the machine can be provided with more than two devices 16, for example four devices (16 "' and 16" ") in the case of five vibrating cells (14, 17 ', 17" ', 20), as shown in fig. 2.
The fabric treatment capacity (shrinkage, drying with dimensional stability and bulkiness) is mainly given by the time the fabric is kept in the machine according to the load of each vibrating cell, by the time the fabric is kept in the machine according to the treatment delivery speed (i.e. the rotation speed of the rolls and the speed of delivery to and removal from the machine), and by the temperature of the air inside the treatment chamber, more particularly the temperature of the air leaving the diffuser.
Obviously, the sequence of actions to which the fabric is subjected can also be implemented in the machine by means of a certain method, differently from what has been described above.
This method for drying and shrinking a continuous fabric comprises, in sequence and continuously, for each consecutive portion of fabric, the following steps:
a) the fabric portion is conveyed to the drying and shrinking area with a moisture content comprised between 10% and 40%, more preferably between 15% and 30%, even more preferably between 18% and 25%,
b) the portion of the fabric is vibrated,
c) passing hot air through the fabric portion, partially winding it on a rotating perforated roller, the temperature of the air being comprised between 60 ℃ and 120 ℃, preferably between 70 ℃ and 110 ℃, and more preferably between 80 ℃ and 100 ℃,
d) repeating the sequence of steps b) -c) b) one or more times for the fabric portion,
a) the residual moisture is comprised between 4% and 0%, more preferably between 2% and 0%, even more preferably equal to about 0%, of the fabric removed from the drying and shrinking zone.
A step of regulating the amount of hot air passing through the fabric portion is provided.
A step is provided of adjusting the continuous transport speed of the web through the drying and shrinking zone.
It is understood that the described contents only show possible non-limiting embodiments of the invention, which may vary in forms and arrangements without however departing from the scope of the concept on which the invention is based. All reference signs in the appended claims are provided solely to assist in reading the claims in light of the foregoing description and drawings, and do not limit the scope of protection in any way.
Claims (13)
1. A machine (10) for drying and shrinking a continuous fabric, comprising:
-a process chamber (11),
-a transport path for continuously transporting a fabric (T) into the treatment chamber (11),
-air heating means (27) capable of heating and moving air,
-a plurality of moving and drying devices (16) for moving and drying a fabric (T), arranged in series along said transport path inside said treatment chamber (11), each moving and drying device (16) comprising:
a rotating drying roller (22) provided with an inner cavity (23) and a cylindrical surface (24) provided with a plurality of channels (25) facing said inner cavity (23), said rotating drying roller (22) being able to be partially wound by the fabric (T) being conveyed so that said rotating drying roller (22) carries with itself said fabric (T) when rotating,
a hot air diffuser (26) operatively connected to the delivery duct of the air heating means (27) and arranged in proximity of the rotating drying roller (22) in a fabric winding area,
suction means (29) for sucking air from inside the rotary drying roller (22) towards outside the treatment chamber (11) so that air from the respective hot air diffuser (26) is sucked from the space (28) between the hot air diffuser (26) and the rotary drying roller (22) towards inside the rotary drying roller (22), through channels (25) provided on the cylindrical surface (24) of the rotary drying roller (22) and then through the fabric (T) arranged on the rotary drying roller (22) in order to dry the fabric,
-a vibrating basin (17) on which the fabric (T) moving between the two successive moving and drying devices (16 ', 16 ") can be placed for each pair of successive moving and drying devices (16', 16").
2. Machine according to claim 1, wherein the air heating means (27) comprise a heating space (34) in which are arranged heating means (35), at least one air inlet (36) for air to enter the heating space (34), at least one heated air delivery opening (37); preferably an air filter (36A) arranged on said air inlet (36); said at least one air inlet (36) for letting air into said heating space (34) preferably connects the inside of said treatment chamber (11) with the inside of said heating space (34); the heating space (34) is preferably housed in the treatment chamber (11); the air heating means (27) preferably comprise a duct (38) operatively connected at one end to the at least one heated air delivery opening (37) of the heating space (34) and at the other end to the respective hot air diffuser (26), at least one air moving device (39) being provided for moving air from the heating space (34) towards the hot air diffuser (26).
3. A machine as claimed in one or more of the preceding claims, wherein said suction means (29) able to suck air from inside the rotary drying roller (22) towards the outside of the rotary drying roller (22) comprise an air discharge duct (30) operatively connected at one end to the inside of the rotary drying roller (22) and at the other end to a discharge duct (31) able to let out the air sucked by the rotary drying roller (22) to the outside of the treatment chamber (11), an air movement device (32) being provided to move the air from the rotary drying roller (22) towards the discharge duct (31); preferably, a single common discharge duct (31) is provided for each air discharge duct (30) for discharging air from each of said rotary drying rollers (22); preferably, a single air moving device (32) for moving air is provided, said single air moving device being connected to said common outlet duct (31).
4. A machine as claimed in one or more of the preceding claims, wherein said suction means (29) able to suck air from inside said rotating drying roller (22) towards outside the rotating drying roller (22) comprise means for varying the amount of air sucked by said rotating drying roller (22); said means for varying the amount of air sucked by said rotary drying roller (22) preferably comprise a deviation device (33) for deviating the air leaving said rotary drying roller (22); preferably, one said deflection means (33) is provided for each air discharge duct (30).
5. Machine according to one or more of the preceding claims, comprising an inlet vibrating basin (14) arranged upstream of the first moving and drying device (16 ') spanned by the fabric (T) and/or an outlet vibrating basin (20) arranged downstream of the last moving and drying device (16 ", 16"') spanned by the fabric (T).
6. Machine according to one or more of the preceding claims, comprising adjustment means for adjusting the inclination of said vibrating basin (14, 17, 20).
7. Machine according to one or more of the preceding claims, comprising a continuous delivery device (13) for delivering the fabric into the machine and/or a continuous take-off device (21) for taking the fabric out of the machine.
8. The machine according to one or more of the preceding claims, comprising electronic devices for controlling, managing and actuating the machine, in which operating programs are set for the operation of the machine, which operating programs provide, in sequence and in succession, for each consecutive fabric portion of the continuous fabric delivered to the machine the following steps:
a) -conveying the fabric portion to a treatment chamber (11), preferably by means of a continuous fabric conveying device (13) for conveying the fabric to the machine, said fabric portion having a moisture comprised between 10% and 40%, more preferably between 15% and 30%, even more preferably between 18% and 25%,
b) vibrating the fabric portions in a vibrating basin, the vibrating basin preferably sloping downwardly from the top in the conveying direction,
c) passing hot air through said fabric portion, said fabric portion being locally wound on said perforated rotating drying roller, said hot air having a temperature comprised between 60 ℃ and 120 ℃, preferably comprised between 70 ℃ and 110 ℃, more preferably comprised between 80 ℃ and 100 ℃,
d) repeating the sequence of steps b) -c) -b) one or more times for said fabric portion depending on the number of rotary drying rolls and intermediate vibrating baths provided,
e) the fabric portion is removed from the treatment chamber, for example by means of a continuous take-off device (21) for removing the fabric from the machine, the residual moisture being comprised between 4% and 0%, more preferably between 2% and 0%, even more preferably equal to about 0%.
9. The machine of claim 8, including the step of adjusting the amount of heated air passing through the fabric portion.
10. The machine according to claim 8, comprising the step of adjusting the continuous transport speed of the fabric through the drying and shrinking zone.
11. A method for drying and shrinking a fabric, said method comprising the steps of, in order:
a) the partial transfer of the fabric, whose moisture is comprised between 10% and 40%, more preferably between 15% and 30%, even more preferably between 18% and 25%,
b) the portion of the fabric is vibrated,
c) at least partially drying the fabric, passing through it hot air at a temperature comprised between 60 ℃ and 120 ℃, preferably comprised between 70 ℃ and 110 ℃, more preferably comprised between 80 ℃ and 100 ℃,
d) repeating the sequence of steps b), c), b) one or more times for said fabric portion,
e) the removal of the fabric portion from the drying and shrinking zone comprises a residual moisture comprised between 4% and 0%, more preferably comprised between 2% and 0%, even more preferably equal to about 0%.
12. The method of claim 11, including the step of adjusting the amount of heated air passing through the fabric portion.
13. The method as claimed in claim 11, including the step of adjusting the continuous transport speed of the web through the drying and shrinking zone.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT102017000034911A IT201700034911A1 (en) | 2017-03-30 | 2017-03-30 | MACHINE AND DRYING METHOD AND RETURN FABRIC TREATMENT |
| IT102017000034911 | 2017-03-30 | ||
| PCT/IB2018/052024 WO2018178838A1 (en) | 2017-03-30 | 2018-03-26 | Machine and method for the drying and treatment of fabric |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110914620A true CN110914620A (en) | 2020-03-24 |
Family
ID=59700042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880031585.XA Pending CN110914620A (en) | 2017-03-30 | 2018-03-26 | Machine and method for drying and treating fabrics |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP3601918A1 (en) |
| CN (1) | CN110914620A (en) |
| BR (1) | BR112019020173A2 (en) |
| IT (1) | IT201700034911A1 (en) |
| WO (1) | WO2018178838A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113882097A (en) * | 2020-07-01 | 2022-01-04 | 牛仔裤科学有限公司 | Method and apparatus for treating textile fabrics |
| CN114322517A (en) * | 2022-01-08 | 2022-04-12 | 宿迁市骏马化纤有限公司 | Heat treatment method of nylon impregnated cord fabric |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110319677B (en) * | 2019-07-11 | 2021-06-04 | 丁娇娇 | Prevent fold cloth drying device based on textile processing |
| IT202000013927A1 (en) * | 2020-06-10 | 2021-12-10 | Tt Italy S P A | “OVERTURNING ROLLER FOR OVERTURNING A TAPED FOOD PRODUCT” |
| CN112695484B (en) * | 2020-12-21 | 2022-07-15 | 浙江绍兴永利印染有限公司 | Heat supply and waste heat recycling integrated setting machine |
| CN113932591B (en) * | 2021-11-09 | 2022-12-23 | 杭州职业技术学院 | Clothing production processingequipment with stoving function |
| CN114963731B (en) * | 2022-06-17 | 2023-07-07 | 仪征市佳裕纺织制品有限公司 | Fold-preventing high-temperature shaping and drying equipment for polyester cloth production |
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| CN114322517B (en) * | 2022-01-08 | 2022-12-13 | 宿迁市骏马化纤有限公司 | Heat treatment device and heat treatment method for nylon impregnated cord fabric |
Also Published As
| Publication number | Publication date |
|---|---|
| BR112019020173A2 (en) | 2020-04-22 |
| WO2018178838A1 (en) | 2018-10-04 |
| IT201700034911A1 (en) | 2018-09-30 |
| EP3601918A1 (en) | 2020-02-05 |
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Application publication date: 20200324 |