JP2007098763A - Peeling method of ductile strip from mold release sheet and apparatus used therein - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a peeling method of a ductile strip from a mold release sheet capable of always smoothly and properly peeling the ductile strip from the mold release sheet without causing deformation, breakage or the like in the ductile strip even if the tackiness of the ductile strip such as an unvulcanized rubber member or the like to the mold release sheet becomes large, and a apparatus used therein. <P>SOLUTION: In peeling the ductile strip 7 lined with the mold release sheet 6 from the mold release sheet 6 against its tackiness to transfer the same, the mold release sheet 6 is separated from the transfer direction 8 of the ductile strip 7 at a leading end of a wedge member 1 to be allowed to run and the force in the peeling direction from the mold release sheet 6 and the force in the transfer direction of the ductile strip 7 are respectively allowed to act on the ductile strip 7 at the front side of the wedge member 1 under the slip of the brush roll 11 opposed to the ductile strip 7 to peel the ductile strip 7 from the mold release sheet 6 without stretching the ductile strip 7. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  This invention is a case where a ductile strip such as an unvulcanized rubber member, which is easy to stretch and breaks, is stored or handled with a release sheet lined in order to prevent accidental stretching, breakage, etc. A method for peeling a ductile strip from a release sheet, and a method for using the ductile strip, which always ensures smooth and appropriate peeling of the ductile strip from the release sheet prior to use of the ductile strip. It relates to the device.

  When an unvulcanized rubber member as an example of a ductile strip is used for molding a raw tire, for example, the release is performed to line the unvulcanized rubber member before feeding it to a predetermined molding work location. A conventional apparatus for peeling from a sheet is shown in a side view in FIG.

  This is because the wedge-shaped member 31 whose thickness is gradually reduced toward the tip and the feeding means 32 for transferring the ductile strip to a required position under the tension load of the release sheet once peeled from the ductile strip, FIG. The drive and driven pulleys 33 and 34 and the endless belt 35 wound around both the pulleys 33 and 34. For example, the transport surface of the endless belt 35 is in the same horizontal plane as the upper surface of the wedge-shaped member 31. One guide roll that provides a traveling path that is bent at an acute angle from the front end of the wedge-shaped member 31 and is largely separated from the transfer direction 38 of the ductile strip 37 between the feeding means that can be positioned. 39, and a release sheet 36 is wound around an intermediate portion between the guide roll 39 and the feeding means 32 to apply a feeding tension thereto. The drive roll 40 to be configured is also configured, for example, by arranging the drive roll 40 according to the level on the transport surface of the endless belt 35.

  In this peeling apparatus, for example, the drive roll 40 is released from a wound structure obtained by winding a laminate of a ductile strip 37 and a release sheet 36 backed on the duct strip 37 based on the adhesive strength thereof into a roll shape. Based on the feeding tension exerted on the sheet 36, the laminate is fed onto the wedge-shaped member 31 without substantially applying tension to the ductile strip 37, where the release sheet 36 is moved to the wedge-shaped member 31. From the front end position, the detouring sheet 36 is peeled off from the ductile strip 37 by causing the ductile strip 37 to travel along the transfer direction 38 toward the feeding means 32 while being detoured through the guide roll 39. Can be made.

  Then, the ductile strip 37 once peeled from the release sheet 36 in this manner is then placed on the release sheet 36 that supports the conveying tension under the action of the feeding means 32, and here again. The material is fed to a predetermined molding work location without substantial action of tension, and is completely separated from the release sheet 36 and supplied onto the peripheral surface of the tire molding drum or the like.

  Here, this separation of the ductile strip 37 from the release sheet 36 at a predetermined molding work location is merely performed by placing the ductile strip 37 on the release sheet 36 on the feeding means 32. Since there is little or no adhesion to the release sheet 36, the separation is always performed smoothly and reliably, without repeating the above.

  However, this separation of the release sheet 36 by this conventional apparatus is mainly performed without causing the ductile strip 37 to be subjected to a tension greater than the cooperating force on the feeding means 32 by the release sheet 36. Since the traveling direction of the release sheet 36 is merely based on the distance from the transport direction of the ductile strip 37 at the tip position of the wedge-shaped member 31, for example, the ductile strip 37 and the release sheet are used. The laminate with 36 is wound and stored in a roll shape, and the ductile strip 37 is applied to the release sheet 36 by the action of the winding force of the winding roll, the influence of the storage environment, and the like. When the adhesive force is increased, when the release sheet 36 is peeled off with a conventional apparatus, the smooth release of the release sheet 36 is performed as shown in FIG. It is often impeded that the ductile strip 37 is drawn into the detouring path of the release sheet 36, which locally increases the tension acting on the ductile strip 37, its width, There is a problem that partial dimensional changes such as thickness are likely to occur, and there is a possibility that the ductile strip 37 drawn into the detour travel path of the release sheet 36 reaches the guide roll 38 and is pulled and broken there. It was.

  An object of the present invention is to solve such problems of the prior art, and an object of the present invention is to provide adhesive strength of a ductile strip such as an unvulcanized rubber member to a release sheet. The method for peeling a ductile strip from a release sheet and its use, which can always be peeled smoothly and properly from the release sheet without causing deformation, breakage, etc. in the ductile strip To provide the equipment.

According to the present invention, a method for peeling a ductile strip from a release sheet is a wedge-shaped method in which a ductile strip lined with a release sheet is transported after being peeled from the release sheet using its adhesive force. The release sheet is bent at, for example, an acute angle at the front end of the member, and is moved away from the transport direction of the ductile strip, and at the front side portion of the wedge-shaped member, the ductile strip is peeled from the release sheet. Each of the directional force and the force in its transfer direction is applied under the slip of a rotating roll against the ductile strip to cause the ductile strip to peel from the release sheet without its stretching.
Here, “no stretching” for the ductile strip includes not only being stretched at all but also stretching within a range of ± 5% with respect to the length.

In this case, preferably, the peripheral speed of the rotating roll is set to a range of 2 to 8 times the transfer speed of the ductile strip.
Also preferably, the stop timing of the rotary roll is delayed by, for example, about 0.5 seconds with respect to the stop of the transport of the ductile strip.

  The apparatus for peeling a ductile strip from a release sheet according to the present invention comprises a wedge-shaped member that gradually thins the ductile strip lined with the release sheet toward the tip side, and a duct strip feeding means. The release sheet is peeled off from the release sheet against the adhesive force of the ductile strip, and the release sheet is bent at, for example, an acute angle at the tip of the wedge-shaped member to transfer the ductile strip. One or more, preferably two or more guide rolls are provided that are separated from the direction and run in a curved manner until reaching the feeding means, and the front side portion of the wedge-shaped member has a higher speed than the transfer speed of the ductile strip. It is rotated, and a brush roll is provided on the ductile strip to apply each of the force in the peeling direction from the release sheet and the transfer direction thereof.

  Here, the brush roll is made of, for example, nylon fiber, vegetable fiber, etc. as a bundle of 2 to 4 mmφ, with a protruding length of about 15 to 25 mm, 5 to 7 mm in the circumferential direction, and 7 to 9 mm in the axial direction. It is constituted by planting at a pitch of.

  In such an apparatus, preferably, the position of the brush roll is set to a position where the transport path of the ductile strip is convex on the side opposite to the travel path of the release sheet with respect to the tip position of the wedge-shaped member.

  In the method according to the present invention, when the ductile strip is peeled off from the release sheet against the adhesive force, the release sheet is greatly separated from the transport direction of the ductile strip at the tip position of the wedge-shaped member. In addition to causing the rotating roll to be stripped and rotated with respect to the ductile strip at the front end portion of the wedge-shaped member, the ductile strip itself has a force in the peeling direction from the release sheet and its transfer direction. By directly applying each of these forces, even when the ductility of the ductile strip to the release sheet is large, the intended stripping of the ductile strip is always smooth and without stretching. It can be done properly.

  Here, without stretching the ductile strip, the optimum peripheral speed of the rotating roll for properly applying the force in the required direction is determined by the properties, dimensions, etc. of the ductile strip, the physical properties of the rotating roll itself, and Although it will change in relation to the frictional force on the ductile strip, etc., when the ductile strip is made of an unvulcanized rubber member and the rotating roll is made of a brush roll as described above, the peripheral speed is usually set to be ductile. By selecting within a range of 2 to 8 times the strip transfer speed, the ductile strip can be smoothly and properly peeled off.

  By the way, in the case where the ductile strip is peeled as described above, when stopping the supply of the ductile strip to a predetermined location, the stop timing of the rotary roll is set to the stop of the transport of the ductile strip. However, if the transfer is stopped, the ductile strip may be temporarily pulled into the detouring path of the release sheet as described in the prior art. The pull-in can be effectively eliminated by the subsequent continuous rotation of the rotary roll.

  In the device according to the present invention, one or more guide rolls guide the detouring of the release sheet from the tip position of the wedge-shaped member, while the brush roll slips and rotates with respect to the ductile strip. The above-described method according to the present invention can be easily and reliably carried out by applying to the ductile strip each of the force in the direction of peeling from the release sheet and the force in the transfer direction thereof. Can do.

  In such an apparatus, when two or more guide rolls are arranged, the detour traveling form of the release sheet can be easily selected as required, and the release sheet can interfere with the brush roll. The fear can be easily removed regardless of the length of the detour traveling path of the release sheet.

  Also, in this device, if the arrangement position of the brush roll is the position where the transport path of the ductile strip is convex on the side opposite to the detour travel path of the release sheet, the convex amount of the strip transport path is selected. Thus, a required force in the peeling direction from the release sheet can be easily and easily applied to the ductile strip without causing elongation deformation or the like in the ductile strip.

  FIG. 1 is a schematic side view showing an embodiment of a peeling apparatus according to the present invention. In FIG. 1, reference numeral 1 denotes a wedge-like member similar to that described in the conventional apparatus, which is gradually thinned toward the tip side, and 2 , Transports the ductile strip peeled from the release sheet to the required location, which also shows the same feeding means as described in the prior art.

  Here, the feeding means 2 includes a driving pulley 3 and a driving pulley 4, and an endless belt 5 wound around the pulleys 3 and 4 and having a conveying surface positioned in the same horizontal plane as the upper surface of the wedge-shaped member 1. It consists of.

As described above, the feeding means 2 directly transfers the release sheet to a target location, and as a result, the ductile strip placed on the release sheet is transferred. It can be transferred to the destination without substantial action of tension on it.
By the way, the ductile strip that has been transported to the target location can be used, for example, through its slack portion, in other words, through a festoon, while the release sheet can be rolled up and reused. Can be provided.

  As shown in this figure, the release sheet 6 is bent between the wedge-shaped member 1 and the supply means 2 as described above at an acute angle from the tip position of the wedge-shaped member 1, and the transfer direction 8 of the ductile strip 7 is achieved. The guide roll 9 that is largely separated from the other side and the other guide roll 10 that makes the release sheet 6 run away from the ductile strip 7 until reaching the feeding means 2 are provided, and the front portion of the wedge-shaped member 1 is provided. Further, the sheet is rotated at a speed 2 to 8 times, for example, about 6 times higher than the transfer speed of the ductile strip 7, slips with respect to the ductile strip 7, and peels the ductile strip 7 from the release sheet 6. In the figure, the required peeling device is provided by connecting and arranging the brush roll 11 for applying the upward force and the force in the transfer direction thereof to the rotation driving means. It is formed.

  Here, the force in the direction in which the ductile strip 7 peels from the release sheet 6 is such that the transfer path of the ductile strip 7 is located at the position where the brush roll 11 is disposed with respect to the tip position of the wedge-shaped member 1 as shown in the figure. In this case, the amount of protrusion is a range in which it does not stretch and deform due to the tension acting on the ductile strip 7. It is necessary to specify within.

  The same applies to the rotational peripheral speed of the brush roll 11, and a force in the transfer direction is applied to the ductile strip 7 so that the detouring path 6 of the release sheet 6 of the ductile strip 7 is applied. The rotational speed of the brush roll for preventing the pull-in to the side is also required to be specified within a range in which the tension acting on the ductile strip 7 by the frictional force of the brush roll 11 does not cause the extension deformation thereof.

  In the peeling device configured as described above, the drive motor of the brush roll 11 is, for example, an air motor that continues to rotate for some time due to inertial force after the supply of air pressure is stopped, or a delay It is possible to use an electric motor or the like that continues to rotate for a short period of time after the driving pulley 3 is stopped under the action of the means, tires, etc. This is preferable for sufficiently removing the drawing state toward the release sheet 6.

  When the ductile strip 7 lined with the release sheet 6 is peeled off from the release sheet 6 against the adhesive force of the release strip 6 and transferred, the action of the guide rolls 9 and 10 is used. The release sheet 6 is bent at an acute angle at the tip position of the wedge-shaped member 1 so that the release sheet 6 is greatly separated from the transfer direction 8 of the ductile strip 7 and travels while being detoured. By the slip rotation of the brush roll 11 disposed at the height position with respect to the ductile strip 7, a force in the peeling direction from the release sheet 6 and a force in the transport direction thereof are applied to the ductile strip 7.

  According to this, in addition to the force in the direction separating from the ductile strip 7 acting on the release sheet 6, based on the slip rotation operation of the brush roll 11 disposed close to the tip to the wedge-shaped member 1. In addition, since the respective forces in the peeling direction and the transfer direction act on the ductile strip itself, the adhesive strength of the ductile strip 7 to the release sheet 6 is increased. The duct 6 is sufficiently prevented from being pulled into the detour travel path side, and the ductile strip 7 can be always peeled smoothly and appropriately from the release sheet 6.

  Then, the ductile strip 7 peeled from the release sheet 6 in this way is then placed on the endless belt 5 of the feeding means 2 via the release sheet 6, and is released by the feeding means 2. Under the tension load by the mold sheet 6, it is transferred to the target location.

  By the way, in the peeling operation of the ductile strip 7 as described above, due to the fluctuation of the adhesive force of the ductile strip 7 to the release sheet 6, the ductile strip 7 temporarily becomes as shown in FIG. Even if it is slightly pulled toward the release sheet 6, this state is quickly eliminated without causing elongation deformation or the like in the ductile strip 7 based on the high speed rotation of the brush roll 11. .

  Note that the retracted state of the ductile strip 7 as shown in FIG. 2 may also occur when the operation of the feeding means 2 and the brush roll 11 is stopped and the transfer of the ductile strip 7 is stopped. For such a fear, as described above, it is sufficient to give a time delay to the stop of the brush roll 11 with respect to the stop of the feeding means 2, thereby making it possible to remove the generated pull-in. Can be dealt with.

It is a side view which shows embodiment of the apparatus which concerns on this invention. It is a side view which shows the example of drawing in a ductile strip. It is a side view which illustrates a conventional device. It is a side view which shows the example of drawing in a ductile strip.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wedge-shaped member 2 Feeding means 3 Drive pulley 4 Driven pulley 5 Endless belt 6 Release sheet 7 Ductile strip 8 Transfer direction 9,10 Guide roll 11 Brush roll

Claims (6)

In transporting a ductile strip lined with a release sheet, peeling it from the release sheet against its adhesive force,
The release sheet is caused to travel away from the transfer direction of the ductile strip at the front end of the wedge-shaped member, and the force in the peeling direction from the release sheet is transferred to the ductile strip at the front side portion of the wedge-shaped member and its transfer. A method of peeling a ductile strip from a release sheet, wherein each of the directional forces is applied under the slip of a rotating roll against the ductile strip, causing the ductile strip to peel away from the release sheet without stretching it.   2. The peeling method from the release sheet according to claim 1, wherein the peripheral speed of the rotating roll is in the range of 2 to 8 times the transfer speed of the ductile strip.   The peeling method from the release sheet according to claim 1 or 2, wherein the stop timing of the rotating roll is delayed with respect to the stop of the transfer of the ductile strip. The ductile strip lined with the release sheet is peeled from the release sheet against the adhesive force of the ductile strip between the wedge-shaped member that gradually becomes thin toward the tip and the duct strip feeding means. A device for causing
The release sheet is separated from the transfer direction of the ductile strip at the front end position of the wedge-shaped member, and provided with one or more guide rolls that are detoured to reach the feeding means, and provided on the front side portion of the wedge-shaped member. The ductile strip is rotated at a speed higher than the transfer speed of the ductile strip, and the ductile strip is provided with a brush roll that applies a force in the peeling direction from the release sheet and a force in the transfer direction of the ductile strip. Peeling device from mold sheet.   5. From the release sheet according to claim 4, wherein the brush roll is disposed at a position where the transfer path of the ductile strip is convex on the side opposite to the travel path of the release sheet with respect to the tip position of the wedge-shaped member. Peeling device.   The peeling apparatus from the release sheet according to claim 4 or 5, wherein two or more guide rolls are provided.

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