JPH0515816B2 - - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an apparatus for continuous decatizing of textiles in autoclaves, in particular with pressurized steam.

BACKGROUND OF THE INVENTION In order to obtain dimensional stability and good appearance, the fabric is subjected to a final finishing process in the presence of steam while being pressed between two supporting auxiliary fabrics to form a so-called "sandermanch". It is known to undergo a decatizing process consisting of holding. Although the first type of decatizing is possible in a normal atmosphere with unpressurized steam, so-called "complete decatizing" is carried out in an autoclave with pressurized steam. The first or conventional type of decatizing can be either batch or continuous, but complete decatizing involves winding up the fabric with the support fabric and then feeding it sequentially in batches into an autoclave for high-pressure decatizing. Usually, it is a batch type because it has to be received.

Several attempts have been made in the past to carry out complete continuous decatizing, particularly with respect to steam-resistant seals, e.g.
The results obtained using inflatable gaskets such as those described in No. In practice, all of these attempts were unsuccessful due to the difficulty of keeping the auxiliary fabric in close contact with the fabric along its entire path.

The object of the present invention is to provide an apparatus which makes it possible to solve the above-mentioned problems in an excellent manner so as to make it possible to treat continuously fed fabrics in a decatizing process under pressure.

SUMMARY OF THE INVENTION An apparatus according to the invention includes: a roller having a large number of small holes, rotatably mounted within an autoclave, and having a diameter not less than 40% of the inner diameter of the autoclave; an inlet and an outlet for steam respectively arranged in the roller holes; and a flow rate of the steam such that a continuous stream of steam can be formed in either an outward or an inward direction through the roller holes. the inlet is slower than the outlet; comprising: a first closed loop of auxiliary fabric wound around said roller by passing through an inlet groove and an outlet groove on the side of the autoclave; The fabric to be treated also enters and exits the autoclave through said grooves respectively; the provision of an auxiliary fabric for guiding the fabric out of engagement with said rollers along a portion of its path inside the autoclave; a second closed loop, the second closed loop having an autoclave inlet and an outlet passing through the groove from an opposite side of the fabric from the first loop; and a transverse sealing roller in the groove and a fabric end; transverse sealing means at the section and drive means having differential speed along said first loop, and two chambers, respectively, being a suction chamber and a compression chamber.
Ex-autoclave fabric cooling means comprising substantially two opposed chambers, wherein the fabric advances between a suction chamber and a compression chamber while being associated with said first loop of fabric, one of said chambers being fabric cooling means, the lateral direction being formed by an additional fabric which is on the opposite side of the fabric from the bonding surface with the first fabric and which is driven at the same speed and in the same feeding direction as the fabric; It is characterized by: being provided;

According to a preferred embodiment of the invention, two transverse grooves are formed in a wall adapted to be attached to the side window of the autoclave by bolts or the like, said wall also containing a pair of opposed rollers and said inlet and supporting the lateral sealing roller and the lateral sealing means pressed against each other by spring means provided in each of the outlet grooves.

According to a particular embodiment of the invention, the front wall of the autoclave is removable to allow the attachment of an auxiliary fabric with respect to the first loop.

Other objects, advantages and features of the device according to the invention will be better understood by those skilled in the art from the following detailed description of preferred embodiments with reference to the accompanying drawings, to which the invention is in no way limited. It's not a thing.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, the apparatus of the invention essentially consists of an autoclave 1 in which a cylinder roller 2 having a plurality of holes in its lateral surface is rotatably mounted in a known manner; The cylinder roller has a diameter not less than 40% of the inner diameter of the autoclave and is covered with a continuous roller cloth (not shown) forming an integral part with the cylinder roller.

Another continuous auxiliary fabric 3, which is likewise unitary and seamless, follows a very long path, partly outside the autoclave and partly inside the autoclave, its entrance into the autoclave being in a groove. 4, and after being wound around the perforated cylinder 2, it passes through the second groove 5 and exits the autoclave.

Similarly, the fabric 6 to be treated also has a portion 3' of the fabric 3.
It passes through the groove 4 and enters the autoclave 1 while being stacked on top of the other. After the fabric is subjected to a decatizing process in an autoclave while being pressed between the fabric surrounding the roller 2 and the section 3'' of the fabric 3,
Exit the autoclave through groove 5. After cooling, the fabric is discharged from point 7, as will be explained later. Inside the autoclave 1 the steam reaches a predetermined pressure and the steam flows continuously through the fabric wound on perforated rollers from the outside to the inside of the fabric and vice versa, but always through the feed nozzle or kettle 8. from the internal inlet 10 to the external outlet 11 of the cylinder to the blow-off valve or drain stock 9 or vice versa. In any case, the steam outlet flow rate is smaller than the inlet flow rate, so the autoclave is always under pressure.
Furthermore, controlling the exhaust flow rate will also control the steam flow rate through the fabric for decatizing purposes. These conditions are shown in Figure 1.
This is indicated by showing the inlet as a larger cross-section than the outlet.

To provide efficient decatizing action,
During processing in the autoclave, it is necessary to tension the auxiliary fabric 3 with great force. This tension imparts a draw force drop or calendering effect to the fabric during decatizing of the fabric in addition to the steam action. The desired tension value, which can be adjusted depending on the finishing result to be achieved, is obtained by actuating the roller 13 via a direct current electric motor or the like arranged within the autoclave and outside the winding area onto the cylinder 2. It will be done.

On the other hand, where the fabric 6 engages the roller 2, the roller 12 provides a braking action. This braking action is obtained by driving, for example, an electrically controlled self-regulating direct current motor or a reverse current motor, so as to keep the desired preset tension of the fabric 6 constant. In order to obtain this braking effect, roller 1
Other known methods with mechanical actuation devices such as pneumatic or magnetic drum brakes, disc brakes, etc., which can actuate directly 2, are of course also suitable. On the other hand, the braking action or drive differential for applying a predetermined tension value to the cloth 3 is also applied to the roller 1 downstream of the roller 13.
5 and the rollers 14 on the upstream side of the cylinder 12 may be provided outside the autoclave. Selecting a roller further away along the closed path of the fabric 3, the roller 1 in the range 3 ^V after the fabric 6 has already separated from the supporting fabric is used as the driving roller.
6 and, as a control roller, a roller 1 on which the fabric to be treated has not yet been superimposed on said fabric.
7 may be used. Naturally, rollers closer to roller 2 are easier to control.

As can be seen in FIG. 1, the fabric 6 is placed in the autoclave 1 in the form of a "sandherch" between the fabric of the roller 2 and the area 3'' of the auxiliary fabric, apart from the inlet and outlet areas between the autoclave and the roller 2. compressed into In this inlet and outlet area the fabric is free and immersed in the steam of the autoclave, so that it tends not to lose the luster previously imparted, especially in the area contained between the roller 13 and the outlet groove 5. Become. To overcome this drawback, in order to ensure that in the autoclave the fabric 6 is always sandwiched between two auxiliary fabrics so that the so-called "Sandermanch" structure is never interrupted, the invention provides a second fabric. 18 are provided. This fabric is also seamless; it enters the autoclave through the groove 4, follows a short path until it approximately joins the perforated cylinder 2, and passes through the two rollers 1.
Two turning rollers 19,2 in the immediate vicinity of 2,13
0 and then finally out of groove 5. The two parallel paths of cloth 18 entering and exiting the autoclave on the outside are the paths 3' and 3 of the main cloth 3 which are located on the opposite side to the cloth when entraining the cloth 6.

Claims (1)

[Scope of Claims] 1. An apparatus for continuous decadizing of textiles in an autoclave, comprising a plurality of small holes rotatably mounted in the autoclave and having a diameter not less than 40% of the inner diameter of the autoclave. an inlet and an outlet for steam located on each side of the roller wall within the autoclave, such that a continuous flow of steam passes through the roller holes in either an outward or an inward direction; The apparatus further comprises an inlet and an outlet in which the steam flow rate is lower at the outlet than at the inlet, the apparatus further passing through inlet and outlet grooves formed laterally and parallel to each other on the autoclave. and includes a first closed loop of auxiliary fabric wrapped around said roller, so that the fabric to be treated also enters and exits the autoclave through each of said channels, and the fabric leaving engagement with said roller is placed inside the autoclave. a second closed loop of auxiliary fabric for guiding along a portion of the path, the second closed loop being on the opposite side of the fabric from the auxiliary fabric of the first closed loop and passing through the groove into the autoclave; a drive means having an inlet and an outlet, in said groove a transverse sealing roller and a transverse sealing means, and at the fabric end having a differential speed along the path of said first closed loop auxiliary fabric; , and 2 which are the suction chamber and the compression chamber, respectively.
Fabric cooling means external to the autoclave are provided which include substantially two facing chambers, the fabric being advanced between the suction chamber and the compression chamber while still connected to the auxiliary fabric of said first closed loop, The chamber is characterized in that the chamber is covered with an additional fabric that is driven at the same speed and in the same feeding direction as the fabric on the side opposite to the surface of connection with the first closed-loop auxiliary fabric. Device. 2. that said wall supports pairs of facing rollers cooperating with their respective grooves on the outside of the autoclave and being pressed together by spring means, and that said walls are provided with steam sealing means in the upward and downward directions; A device according to claim 1, characterized in that: 3. said lateral sealing means is a fabric and said first
at each end of the groove off the outer edge of the auxiliary fabric of the closed loop and the second closed loop, including a gasket for closing the associated groove with an integral block member for acting as a seal on the outside of the wall; Claim 1, characterized in that the member is connected to an associated gasket via a portion passing through said groove, the position of each gasket being laterally controlled via actuating means responsive to a photocell device. The device according to item 1.