JPH07300258A - Unwinding method for fabric - Google Patents

Abstract

PURPOSE:To easily fit or remove a mandrel and deliver a glass fiber woven fabric via vibrationless stable rotations by supporting the whole fabric wound on a core on holding rollers sliding on the lower sections of the outer peripheries of disk-like flanges at both ends, and delivering the fabric while constant brakes are applied to the flanges. CONSTITUTION:The fabric 2 wound on a mandrel 1 in a roll shape is rotated and unwound by multiple rollers 8 supporting the outer peripheries of the flanges 1a of the mandrel 1 from below, and the fabric 2 can be unwound from the mandrel 1 via invariably smooth rotations. Brake devices 20 are provided on end faces of the flanges la on both sides of the mandrel 1 to prevent the free rotation of the mandrel 1. The mandrel l can be fitted to a stand 10 when the mandrel 1 wound with the fabric 2 is merely mounted on the holding rollers 8. The fabric 2 can be roughly set in frequent fitting/removing processes, and the switching work can be sharply improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for unwinding a cloth which can be stably fed out to a continuous surface treatment device when surface-treating glass cloth or the like.

[0002]

2. Description of the Related Art Glass fibers are spun, that is, in the process of forming a strand by forming a strand of molten glass, a large number of single fibers are bundled into a sizing agent (Bind).
er) is applied. This sizing agent is a film former made of a plastic emulsion that has an affinity with it, depending on the resin to be reinforced, and is mixed with a surface treatment agent. The strand product with this is used immediately as a reinforcing material. You can do it. In addition, the sizing agent for woven fabrics is mainly composed of starch and fats and oils, and the strands endure severe work such as contact with mechanical parts and friction during the process of twisting yarns, woven fabrics, etc. It is applied to protect from damage, prevent fluffing and yarn breakage, improve workability, and maintain quality.When reinforcing resin with glass cloth, etc., there is a sizing agent. However, it prevents the adhesion of glass and resin. Therefore, prior to use, it is necessary to remove the sizing agent and further apply a surface treatment agent that improves the adhesion between the resin and glass. As a method for removing this sizing agent, heat cleaning is performed at a high temperature of 400 ° C for a long time. The method of heat treatment is generally performed. The heat treatment of this glass cloth (hereinafter referred to as “glass fiber woven fabric”) is performed by heating the glass fiber woven fabric after the warp sizing agent and the sizing agent before the surface treatment are wound around a steel core called a mandrel. Then, heat treatment at 400 ° C. is applied to the slag and the sizing agent and the like are removed.

Then, the glass fiber woven fabric wound in a roll shape from which the sizing agent has been removed is conveyed to a processing device for silane treatment, and a square shaft is passed through the center of the mandrel to send out the processing device. Set on the let-off stand installed on the side, hold and rotate the square shaft, pull out the wound glass fiber woven fabric one by one, and dip it in the bath containing the silane coupling agent while controlling the tension to a certain level. Then, silane treatment is performed. After that, the glass fiber woven fabric is squeezed by a predetermined amount by squeezing treatment, and then dried to be bonded to the surface of the glass fiber.

[0004]

However, since the mandrel and the square shaft described above are used in common for all kinds of glass fiber woven fabrics and are used many times by using a hoist or the like for each treatment, the mandrel and the square shaft should not be collided at the time of work. Bending of the square shaft often occurred. Further, since the square shaft is long, it is easily bent, and distortion may occur due to long-term use. Passing such a bent square shaft through the mandrel, setting it on the let-off stand which is the feeding part of the above-mentioned processing device, and when feeding the glass fiber fabric, the mandrel rotates in an arc, so the guide provided in the running process Wrinkles are formed in the glass fiber fabric by a roll or draw roll. This phenomenon was remarkable in the thin glass fiber woven fabric having a thickness of 150 μm or less. In order to prevent this wrinkle, if processing is performed without passing through the draw roll, wrinkle generation can be suppressed, but tension control cannot be performed, which causes liquid pooling on the padder roll.

Further, since the mandrel is attached to and detached from the let-off stand by using a hoist or the like, the receiving port of the let-off stand has no choice but to have a rough structure, and a highly accurate bearing structure cannot be obtained. Therefore, the rotation of the mandrel did not become a perfect circle due to the gaps between the square shaft and the mandrel and between the square shaft and the stand, and the glass fiber woven fabric could not be smoothly delivered.

As described above, in the case of a woven fabric wound into a roll, the woven fabric is wound when a hoist or the like is used to convey the woven fabric and the processing device is frequently attached to and detached from a predetermined position. Since the woven fabric is fed out by rotating the shaft around the axis, the rotation of the mandrel is eccentric due to the bending of the shaft and the like, and the woven fabric cannot be fed out smoothly without vibration. The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a method for delivering a fabric in which the mandrel can be easily attached and detached and the glass fiber fabric can be delivered by stable rotation without vibration at all times. .

[0007]

Means for Solving the Problems The above-mentioned object is to provide disk-shaped flanges at both ends, and to unwind the cloth wound in a roll shape around its core at a constant speed. This is achieved by a method of unwinding a fabric in which the lower portion of the outer peripheral end surface of the flange is supported by a slidable holding roller and the fabric is fed while a constant brake is applied to the flange.

[0008]

Since the cloth wound around the mandrel in a roll shape is unrolled by being rotated by a plurality of rollers that support the flange outer peripheral end surface of the mandrel from below, the cloth can always be unwound smoothly from the mandrel. I can. Also, when attaching or detaching the mandrel to or from the stand, it can be set simply by placing the mandrel wound on the roller on the roller.
In the process of frequently attaching and detaching, the fabric can be roughly set and the switching work can be greatly improved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a let-off stand installed on a fabric feeding side of a silane treatment device (not shown), showing a state diagram in which a mandrel is attached. FIG. 2 shows the front view. In the figure, reference numeral 1 is a mandrel, which is provided with a disc-shaped flange 1a having a constant thickness on the left and right, which is spaced apart by a width dimension of the glass fiber woven fabric 2, and a shaft 1b is inserted into the center of the flange 1a. Form a core. Reference numeral 10 is a let-off stand that rotatably supports the mandrel 1 in which the glass fiber woven fabric 2 is wound in a roll shape, and a base 13 fixed to the floor surface, and columns 12 standing on both front and rear sides of the base 13. , A beam 11 installed in the center between the front and rear columns
Each of the beams 11 of the let-off stand 10 is provided with a holding roller 8 composed of a pair of free rollers that slidably move the end faces of the left and right flanges 1a of the mandrel 1a so as to support the mandrel 1 from below. It is fixed.

Further, 7 is fixed to a column which is erected in the feeding direction of the glass fiber woven fabric 2, and is a pop-out prevention roller for slidably moving the substantially central portion of the end face of the flange 1a, which is provided on each of the left and right flange portions, The mandrel 1 is rotatably supported by the holding roller 8.

As described above, since the shaft of the mandrel 1 is not directly rotated, the end surface of the flange formed of a perfect circle is supported and rotated by the rollers 7 and 8 arranged on the lower surface.
You can always rotate smoothly without vibration. 15 is
A lateral movement preventing roller that prevents the mandrel 1 from swinging to the left or right during operation is slidable on the flange surface of the mandrel 1 with a width interval of the mandrel 1. 20 is
In order to prevent free rotation of the mandrel 1, one end is fixed to a support by a brake device which is hung on the end faces of the flange portions on both sides of the mandrel 1, and a band-shaped leather band 4 is slidably attached to the outer periphery of the flange. , The weight 5 for adjusting the braking force is hung at the tip.

As described above, the let-off stand, which is a fabric feeding device, has the above-mentioned structure. Explaining the case where this let-off stand is used in a surface treatment device,
The glass fiber woven fabric, which is wound around the mandrel in a roll shape and from which the sizing agent after the heat treatment has been removed, has its body banded and hung on a hoist or the like, and the rollers 7 and 8 on the let-off stand 10 on the inlet side of the surface treatment apparatus. Unloaded on. A mandrel 1 to be set on the let-off stand 10.
Since the laterally moving rollers 3 are provided on the left and right at a distance of the width of the mandrel 1, the mandrel 1 is guided and regulated by the roller 3 and smoothly descends, and the flange end surface of the mandrel 1 pops out and the roller 7 and the holding roller 8a. , 8b is set on the vehicle. Therefore, the mandrel can be easily set on the let-off stand 10, and the centering of the fabric is always set with the end surface of the flange 1a of the mandrel 1 on the surfaces of the rollers 7 and 8.

Next, the end portion of the glass fiber woven fabric 2 wound around the mandrel 1 is pulled out, and a fixed rotation drive is applied to pull out the woven fabric 2 from the mandrel 1. No. 1 for adjusting the tension of the woven fabric 2 after passing through the draw roll 1 and the accumulator. 2 Pass the draw roll. Then, it is immersed in a solution of a silane coupling agent to be treated with silane, squeezed, and dried to bond to the surface of the glass fiber woven fabric.

As described above, in the glass fiber woven fabric, the flange end surface of the mandrel 1 is slidably pulled out by the rollers 7 and 8, so that even if the mandrel shaft is bent and eccentric as in the conventional case, It is possible to always rotate in a perfect circle without being affected by. The flange of the mandrel is structurally sturdy, and unlike a long shaft, it does not bend when used, so it is stable for a long time even when it is repeatedly used for transportation and set. Can be used.

Further, since the woven fabric 2 is pulled out by the smooth rotation of the mandrel, wrinkles are not generated unlike the conventional method even when it passes through the guide roll, the draw roll, etc. in the process of applying the surface treatment described above. Since it can be smoothly drawn out at a constant speed and a cloth width, the surface treatment of the cloth such as the glass fiber woven cloth can be uniformly applied. As described above, in the examples, the case of applying to the glass fiber woven fabric is described.
The present invention is not limited to this, and can be applied to all unwinding methods of the cloth in which the surface treatment is applied to the cloth in general.

[0016]

As described above in detail, the present invention relates to a method for unwinding a cloth wound in a roll shape, in which a mandrel wound on the cloth is held by supporting the outer peripheral end surface of the flange from below. Since the fabric is unrolled while being rotated by the rollers, the fabric can be always unrolled with a smooth rotation. Also, since the mandrel can be attached to and detached from the let-off stand and the like without passing through the shaft as in the conventional case, the attachment and detachment can be extremely easy and the centering can be automatically performed in the set state.

[Brief description of drawings]

FIG. 1 is a side view of a let-off stand used in an embodiment of the present invention.

FIG. 2 is a front view of FIG.

[Explanation of symbols]

 1 Mandrel 1a Flange 2 Glass fiber woven fabric 4 Leather band 5 Weight 7 Protrusion prevention roller 8 Holding roller 13 Let-off stand 15 Lateral movement prevention roller 20 Braking device

Claims (1)

[Claims] 1. A disk-shaped flange is provided at both ends, and when the cloth wound in a roll shape is wound around the core at a constant speed, the entire wound cloth slides on the lower part of the flange outer peripheral end surface. A method of unwinding a cloth, which is supported by a holding roller and sends the cloth while applying a certain brake to the flange.