JPH0473259A - Method for automatically controlling shrinkage factor of fabric - Google Patents

Abstract

PURPOSE:To obtain an always homogenous shrinking finished fabric by controlling a shrinkage regulating mechanism in the direction so as to make a comparative difference between the shrinkage factor calculated from sensed values of length measuring instruments respectively arranged in fabric introducing and leading out parts in a shrinking finish process and the preset shrinkage factor zero. CONSTITUTION:In a shrinking finish process provided with a shrinkage regulating mechanism for a fabric, length measuring instruments are respectively arranged in fabric introducing and leading out parts to measure the fabric length in unit time and the resultant values are inputted to an arithmetic circuit. In the aforementioned arithmetic circuit, the shrinkage factor of the fabric is calculated from both the measured values to compare the obtained values with the preset shrinkage factor in a comparing circuit. The aforementioned shrinkage regulating mechanism is then controlled in the direction so as to make the comparative difference thereof zero.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to an automatic shrinkage rate control method developed to automatically control the shrinkage rate of a continuously transported long fabric. It is something.

[Prior Art] When it comes to industrially produced and processed long fabrics, there is a well-known fabric finishing process for finishing the fabric to a predetermined length or for imparting a desired amount of shrinkage to the fabric. It is. In other words, in the case of unset knits, wool, or fabrics containing wool during production or processing, or in the case of fabrics with poor setting, when garments sewn from such fabrics are subjected to liquid treatment such as washing or when massaging force is applied. The amount of shrinkage is large, resulting in the problem that manufactured clothing or the like will shrink when washed or the like. In order to eliminate this problem, the fabric to be produced and processed is shrink-processed in advance using a shrink machine to increase the fiber color of the fabric.
As a result, shrink finishing treatments for fabrics that prevent wash shrinkage are known.

Conventionally, this shrinking process is performed by continuously shrinking the fabric using a shrinking machine that is a combination of an endless rubber belt and a press roll, and a heat cylinder roll that heat-sets the fabric that has been shrunk by the shrinking machine. However, during continuous shrinkage of such a fabric, it is necessary to adjust and manage the amount of shrinkage so that it reaches the desired amount of shrinkage.

[Problem to be Solved by the Invention] However, the conventional means for controlling the amount of shrinkage during shrinkage setting processing is based on the number of rotations of a foot roll disposed at the introduction part of the fabric shrinkage device and the output part of the fabric shrinkage device. The number of rotations of a thermal cylinder roll installed nearby is calculated, and the amount of fabric shrinkage in the fabric shrinking device is detected based on this blade pressure value, or the above-mentioned feet are forcibly driven. Slip easily occurs between the roll or heat cylinder roll and the fabric, which often makes it impossible to accurately calculate the amount of shrinkage. Therefore, in the past, the amount of shrinkage of the fabric was manually adjusted based on the experience of the worker.However, with this adjustment method, uniformity may be lost due to individual differences among workers, or it may require skill. Therefore, there is a problem that it is difficult to obtain a uniform and high-quality shrink-treated cloth.

[Means for Solving the Problems] The present invention has been made in view of the above problems, and provides a shrink finishing process for fabrics provided with a shrink adjustment mechanism having an endless rubber belt and a press roll that comes into contact with the belt. In this step, a length measuring machine having a length measuring roll, a measuring pulse encoder, and a seam detector is installed in each of the fabric introducing part and the fabric guiding part in the above process, and the units in the fabric introducing part and the fabric guiding part are installed. Measure the length of the fabric within each time, detect the shrinkage rate of the fabric from both measured values, compare the detected value with a preset shrinkage rate, and shrink the fabric so that the difference in this comparison approaches the zero value. The adjustment mechanism is automatically controlled to automatically control the fabric shrinkage rate, and this allows the shrinkage process of the fabric to be shrinked to be automatically controlled to a preset shrinkage rate. Therefore, it is possible to obtain high-quality shrink-processed cloth with high shrinkage precision under unmanned (labor-saving) conditions.

[Example] The present invention will be described in detail below based on an example shown in the drawings. Figure 1 shows the fabric shrinkage finishing process, in which an inlet length measuring machine 1 is installed at the fabric inlet of process A, and an inlet length measuring machine 1 is installed at the fabric outlet of process A. is equipped with two length measuring machines at the exit. Entrance length measuring machine 1
and the outlet length measuring machine 2 have the same structure, and a timing pulley is provided on the shaft of the fabric guide roll 4 and a pulse encoder shaft (not shown), and the rotation of the guide roll is pulsed by a timing heald connecting both pulleys. A length measuring machine that measures the length of the transferred fabric 10 by the number of pulses transmitted to an encoder or a known length measuring machine may be used, and detailed illustrations thereof will be omitted. 3 is a seam detector for specifying the start time of length measurement. A tamping hook 5, a preheating cylinder 6, a shrinkage adjustment mechanism 7, a drying cylinder 8, and a front end length measuring machine 2 are arranged in this order along the fabric transfer direction from the entrance length measuring machine 1. The contraction adjustment mechanism 7 includes an endless rubber heald 7a,
A press roll 7 that preskites the fabric that is superimposed on the surface of the rubber belt 78 and is transferred together with the rubber heald 7a.
b, and can use the elastic action of the surface of the rubber belt 78 to apply a shrinkage force to the fabric transferred overlapping the surface of the rubber heald 7a, or the individual structure of this shrinkage adjustment mechanism. , is conventionally known, so further detailed explanation will be omitted.

Next, automatic control of shrinkage rate using the above device will be described. First, when the seam detector 3 at the entrance of the fabric detects that the base point of the fabric has been passed, from this point on, a timer is activated to set a predetermined measurement time and a pulse generated by driving the guide roll 4. , measurement of the introduction length of the fabric 10 is started. This fabric 10 includes the damping box 5, the preheating cylinder 6, and the shrinkage adjustment mechanism 7.
The fabric is then subjected to appropriate shrinkage through a drying cylinder 8, and then passes through a fabric outlet length measuring machine 2 to exit the shrink finishing process.

Therefore, the shrinkage rate of the fabric in the shrink finishing process A is measured by the ratio of the length measured by the entrance length measuring device 1 and the length measured by the exit length measuring device 2. In order to automatically control the ratio to a desired value, this embodiment performs control as shown in FIG. In other words, the measured value by the entrance length measuring machine 1 and the value measured by the exit length measuring machine 2
The measured value is used to calculate the shrinkage rate due to the current shrinkage finishing process using an arithmetic circuit. The calculated current number 1ii
The shrinkage rate is compared with the shrinkage rate preset by the shrinkage rate setting circuit using a comparison circuit, and if the current shrinkage rate is smaller than the set shrinkage rate as a result of the comparison, the shrinkage rate is increased. The speed of the fabric shrinker 7 or the drying cylinder 8 is automatically controlled via the drive circuit, and if the current shrinkage rate is lower than the set shrinkage rate, the shrinkage machine drive circuit is set so that the shrinkage rate is smaller. fabric shrinker 7 or drying cylinder 8
The speed of the process is automatically controlled so that the shrinkage rate at the time of realization becomes equal to the set shrinkage rate.

[Effects of the Invention] As described above, the present invention includes, in a shrink finishing process equipped with a mechanism for adjusting the amount of fabric shrinkage, a length measuring machine is disposed in each of the fabric introduction part and the fabric lead-out part of the shrink finishing process, The length of the fabric is measured within a unit time at the fabric introduction part and the fabric derivation part, the shrinkage rate of the fabric is detected from the long chains on both sides, and the detected value is compared with a preset shrinkage rate. Since the shrinkage adjustment mechanism is automatically controlled so that the difference approaches zero, it is possible to automatically control the shrinkage of the fabric to be shrinked to a preset shrinkage rate. Therefore, it is possible to obtain a high-quality shrinkable Loe cloth with high shrinkage accuracy while being unmanned (labor-saving).

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a control method according to the present invention, and FIG. 2 is an explanatory block diagram. 1...Entrance length measuring machine 2...Exit length measuring machine 3...
・Seam detector 4... Kite roll 5... Damping hox 6... Preheating cylinder 7... Shrinkage adjustment mechanism 8...
・Drying cylinder 10...Fabric Figure 2 Entrance length measuring machine Fabric shrinking machine Outlet length measuring machine and 4 others

Claims (1)

[Claims] 1. In a shrink finishing process equipped with a mechanism for adjusting the amount of fabric shrinkage, a length measuring machine is placed in each of the fabric introduction part and the fabric lead-out part of the shrink finishing process, and within a unit time at the fabric introduction part and the fabric lead-out part, Measure the length of the fabric, detect the shrinkage rate of the fabric from both measured length values, compare the detected value with a preset shrinkage rate, and adjust the shrinkage amount so that the comparison difference approaches zero value. A method for automatically controlling the shrinkage rate of a fabric, characterized by automatically controlling a mechanism.