JP3710248B2 - Method and apparatus for winding thermoplastic resin film - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a winding method and apparatus for winding a thermoplastic resin film around a winding drum.
[0002]
[Prior art]
As a conventional method for winding a resin film, for example, a method described in Japanese Patent No. 2528269 is known. After attaching one end of the adhesive tape piece to the winding drum, this is moved toward the winding drum while holding the starting end of the resin film by the chucking mechanism, and the other end of the winding drum and the adhesive tape. Next, after the other end portion of the adhesive tape is pressed against the starting end portion of the resin film and adhered, the winding drum is rotated to wind the resin film around the winding drum. Next, after the resin film is cut in the width direction on the upstream side from the winding start position, the winding drum is rotated to move the terminal portion of the resin film to the winding start position. Next, the adhesive tape piece is attached to both the end portion of the resin film and the already-wrapped resin film, and the end portion of the resin film is locked to the already-wrapped resin film.
[0003]
[Problems to be solved by the invention]
However, in such a conventional method for winding a resin film, when the resin film is wound, the starting end of the resin film must be gripped by the chucking mechanism. There is a problem. In addition, since the end treatment of the start and end portions of the resin film is performed using an adhesive tape piece, the cost for the adhesive tape is separately required and expensive, and a special for supplying the adhesive tape piece Necessitates an expensive device, which further increases the cost.
[0004]
An object of the present invention is to provide a method and an apparatus for winding a thermoplastic resin film, which are inexpensive and can improve work efficiency.
[0005]
[Means for Solving the Problems]
The purpose of this is to firstly bring the thermoplastic resin film hanging from the fusion member close to the winding drum together with the fusion member because the starting end portion is located beyond the fusion member, A process of heating and fusing the resin film while pressing the starting end of the resin film against the winding drum, and a step of separating the fusion member from the winding drum and rotating the winding drum to wind the resin film around it. Heating and fusing the resin film in the vicinity of the winding start position to the already wound resin film by the fusion member, and partially cutting the resin film in the width direction upstream from the winding start position; Rotate the winding drum and wind the resin film until the partially cut part exceeds the fusion member. A step of winding around the winding drum, and rotating the winding drum in a state where the winding speed of the winding drum is larger than the traveling speed of the resin film, thereby separating the resin film at the partially cut portion, Secondly, the winding of the thermoplastic resin film to be wound around the winding drum by the method of winding the thermoplastic resin film comprising the step of hanging the starting end portion of the resin film formed by separation from the fusion member. A fusion member that is disposed in the vicinity of the start position and that can heat the resin film while pressing the resin film so that the resin film can be fused to the winding drum or an already wound resin film, and the fusion member close to the winding drum Contact / separation means for separating, and starting position for winding the resin film And a cutter that partially cuts in the width direction on the upstream side, and when the winding of the resin film around the winding drum is completed, the resin film near the winding start position is fused to the already wound resin film by the fusion member. In addition, after the resin film is partially cut in the width direction by the cutter on the upstream side from the winding start position, the winding film is rotated until the partially cut portion exceeds the fusion member by rotating the winding drum. A thermoplastic resin wound around and then separated from the partially cut portion of the resin film, and the starting end portion of the resin film formed by the separation is suspended from the fusion member. This can be achieved by a film winding device.
[0006]
Now, it is assumed that the start end portion of the thermoplastic resin film is located beyond the fusion member, and the start end portion hangs down from the fusion member. When the resin film is wound around the winding drum from such a state, first, the contact / separation means is operated to bring the fusion member closer to the winding drum. At this time, the fusion member has a starting end portion of the resin film. However, the resin film also approaches the winding drum together with the fusion member. When the starting end portion of the resin film is pressed against the winding drum by the fusing member, the fusing member heats the starting end portion of the resin film to be fused to the winding drum. Next, the contacting / separating means is operated to separate the fusion member from the winding drum, and the winding drum is rotated to wind the resin film around it. Then, when the winding operation of the resin film around the winding drum is completed, the resin film near the winding start position is heated and fused while being pressed against the already wound resin film by the fusion member, and the resin film is moved from the winding start position. On the upstream side, the cutter is cut partially in the width direction, that is, leaving a part. Next, the winding drum is rotated so that the resin film is wound around the winding drum until the partially cut portion exceeds the fusion member, and then the winding speed of the winding drum is set higher than the traveling speed of the resin film. In this state, the winding drum is rotated again, and the resin film is cut off at the partially cut portion. At this time, since the starting end portion of the resin film formed by the separation is located beyond the fusion member, it falls down by its own weight and hangs down from the fusion member. Thus, when the resin film is separated, the next end of the resin film to be wound next is delivered to the fusion member, so that the next winding operation can be started immediately in this state, thereby improving the work efficiency. Will improve. In addition, since the terminal treatment of the resin film is performed by fusing the resin film, there is no need for an adhesive tape piece that is consumed by use or a device for supplying the adhesive tape piece, the structure is simplified, and the winding is performed. Costs required can be reduced.
[0007]
Moreover, if comprised as described in Claim 2, even if a strip | belt-shaped member has adhesiveness, this can be temporarily stored easily.
Furthermore, if it comprises as described in Claim 3, the cutting | disconnection operation | work of a resin film will become easy.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, 11 is a winding drum that can rotate around a horizontal axis, and a thermoplastic resin film 12 (a thin polyethylene film or the like, usually called a liner) is just above the winding drum 11 and slightly above it. A film roll 13 wound in the form of a roll is installed, and this film roll 13 can rotate around an axis parallel to the winding drum 11. Reference numeral 14 denotes a conveyor having a downstream end (front end) positioned immediately above the film roll 13 and extending in the front-rear direction. The conveyor 14 moves a belt-shaped member 15, such as a belt-ply tire constituent member toward the front. Transport. A cutting mechanism (not shown) for cutting the belt-like member 15 is installed on the conveyor 14. The resin film 12 unwound from the film roll 13 travels toward the winding drum 11, and is then wound around the winding drum 11. At the time of winding, the conveyor 14 travels and the belt-shaped member 15 is moved. The belt-like member 15 is supplied onto the resin film 12, whereby the belt-like member 15 is wound around the winding drum 11 while being sandwiched between the resin films 12.
[0009]
Reference numeral 16 denotes a winding device installed immediately below the film roll 13. The winding device 16 has a fixed frame 17 and a horizontal cylinder 18 fixed to the fixed frame 17 and extending in the front-rear direction. This cylinder 18 has a rod 19 that can move in the front-rear direction, and a pressing roller 21 that rotates about an axis parallel to the axis of the winding drum 11 can rotate through a bracket 20 at the front end (tip) of this rod 19. It is supported by. A cylinder 22 is fixed to the bracket 20 via an L-shaped support member 23 and extends parallel to the cylinder 18. The cylinder 22 also has a rod 24 that can move in the front-rear direction. A fusing member 25 is attached to the front end (tip) of the rod 24, and the fusing member 25 is disposed in the vicinity of the winding start position P where the winding of the resin film 12 around the winding drum 11 starts. The fusion member 25 is fused to the winding drum 11 or the already-wrapped resin film 12 by heating the resin film 12 in the vicinity of the winding start position P while pressing it against the winding drum 11 or the already-wrapped resin film 12. Let The cylinders 18 and 22 described above constitute a contact / separation means 26 for bringing the fusion member 25 close to and away from the winding drum 11 as a whole.
[0010]
A cylinder 27 is fixed to the fixed frame 17 above the contact / separation means 26 and is parallel to the cylinder 18. The front end (tip) of the piston rod 28 of the cylinder 27 has a width direction of the resin film 12, that is, a winding drum. A pair of 11 rodless cylinders 29 extending in the axial direction are attached, and cutters 30 are attached to the moving members of these cylinders 29, respectively. These cutters 30 are stretched upstream of the winding start position P, specifically between the pressing roller 21 and the film roll 13, when the resin film 12 is fully wound around the winding drum 11. The resin film 12 is partially cut in the width direction, here, both ends in the width direction are cut while leaving the center portion of the resin film 12 in the width direction.
[0011]
Next, the operation of one embodiment of the present invention will be described.
Now, as shown by the solid line in FIG. 2, the starting end portion 12a of the resin film 12 is fed to the winding drum 11 side, that is, the front side, beyond the fusion member 25, whereby the starting end portion 12a is transferred to the cylinder 22. As a result of the above operation, it is assumed that the fuser member 25 hangs down while being caught by the fuser member 25 located in front of the pressing roller 21. At this time, since the winding drum 11 is empty and the piston rod 28 of the cylinder 27 is retracted, the cutter 30 is retracted backward from the travel path of the resin film 12.
[0012]
When the resin film 12 is wound around the winding drum 11 from such a state, first, the cylinder 18 of the contact / separation means 26 is operated to move the fusion member 25 and the pressing roll 21 forward and approach the winding drum 11. Let At this time, since the start end portion 12a of the resin film 12 is hanging down on the fusion member 25, the start end portion 12a of the resin film 12 approaches the winding drum 11 together with the fusion member 25. Then, when the starting end portion 12a of the resin film 12 is pressed against the outer peripheral surface of the winding drum 11 by the fusing member 25 as indicated by a virtual line in FIG. 2, the fusing member 25 generates heat, and the starting end of the resin film 12 is generated. The part 12a is heated and fused to the winding drum 11. Next, the rod 24 of the cylinder 22 is moved backward, and the fusion member 25 is separated from the winding drum 11. At this time, the rod 19 of the cylinder 18 is moved forward, and the resin film 12 at the winding start position P is pressed against the winding drum 11 by the pressing roller 21 instead of the fusion member 25.
[0013]
Next, the winding drum 11 is rotated several times at a low speed, and the resin film 12 is wound around the periphery of the winding drum 11 by several turns. Thereafter, the winding drum 11 is continuously rotated, and the conveyor 14 is run at the same speed as the resin film 12 to supply the belt-like member 15 onto the resin film 12. As a result, the resin film 12 unwound from the film roll 13 and the belt-shaped member 15 fed from the downstream end of the conveyor 14 travel toward the winding drum 11, and then are pressed against the forming drum 11 by the pressing roller 21. The member 15 is wound around the winding drum 11 one after another while being sandwiched between the resin films 12. At this time, as shown in FIG. 3, the pressing roller 21 is pressed by the resin film 12 and the belt-like member 15 wound around the winding drum 11 one after another and gradually moves backward. As described above, when the resin film 12 is wound around the winding drum 11, if the belt-like member 15 is wound while being sandwiched between the resin films 12, the belt-like member 15 can be used even if it has adhesiveness. Can be wound up and stored easily. Then, immediately before the winding operation of the resin film 12 and the belt-shaped member 15 on the winding drum 11 is finished, the rotation of the winding drum 11 is temporarily stopped. Next, after the belt-like member 15 is cut on the conveyor 14, the winding drum 11 is rotated several times at a low speed in a state where the traveling of the conveyor 14 is stopped, and only the resin film 12 is wound while being tightened several times. As a result, the winding drum 11 becomes full and the winding operation is completed.
[0014]
Next, the cylinder 22 is actuated to bring the fusing member 25 closer to the winding drum 11, and the resin film 12 in the vicinity of the winding start position P is already wound by the fusing member 25 as shown by phantom lines in FIG. Press against resin film 12. In this state, the resin film 12 at the position pressed by the fusion member 25 is heated and fused to the already wound resin film 12. Next, the cylinder 22 is operated to separate the fusion member 25 from the winding drum 11. Next, the piston rod 28 of the cylinder 27 is protruded, and the cutter 30 is moved toward the resin film 12 stretched between the winding drum 11 and the film roll 13. Next, the cylinder 29 is operated to move the cutter 30 in the width direction of the resin film 12, and the cutter 30 partially cuts the resin film 12 on the upstream side from the winding start position P, here both ends in the width direction. To do. At this time, the central portion in the width direction of the resin film 12 is not cut and left, for example, about 5 to 6 cm. Next, the cylinders 29 and 27 are operated to return the cutter 30 to the initial position that does not affect the resin film 12.
[0015]
Next, the winding drum 11 is rotated, and the resin film 12 is wound around the winding drum 11 as an outermost layer film until the partially cut portion exceeds the fusion member 25 by a predetermined distance. Next, the winding drum 11 is rotated again while the film roll 13 is braked to stop the running of the stretched resin film 12. As a result, the winding speed of the winding drum 11 becomes larger than the traveling speed of the resin film 12 (here, zero), and thereby, the tensile force in the longitudinal direction in the outermost resin film 12 and the stretched resin film 12 The resin film 12 is cut off at the part where the resin film 12 is weakest in strength, that is, at the partly cut part where only the central part in the width direction is connected here. In this way, the resin film 12 can be easily separated, and the state at this time is shown in FIG. Next, the rod 19 of the cylinder 18 is moved rearward while moving the rod 24 of the cylinder 22 forward, and the fusion member 25 is positioned forward of the pressing roller 21. At this time, the start end portion 12a of the resin film 12 formed by the separation falls down due to its own weight, and only a predetermined length hangs forward from the fusion member 25. Thus, when the resin film 12 is cut off, the next end of the resin film 12 to be wound next can be transferred to the fusion member 25, so that the next winding operation can be started immediately in this state, This improves work efficiency. In addition, since the terminal treatment of the resin film 12 is performed by fusing the resin film 12, an adhesive tape piece that is consumed due to use and a device for supplying the adhesive tape piece become unnecessary, and the structure of the device is simplified. At the same time, the cost required for winding can be reduced. Thereafter, when the full winding drum 11 is replaced with an empty winding drum 11, the initial state shown in FIG. 2 is obtained. The above is one cycle of the operation of this embodiment. Thereafter, this cycle is repeated, and the resin film 12 and the belt-like member 15 are wound around the winding drum 11 one after another.
[0016]
In the above-described embodiment, after the resin film 12 in the vicinity of the winding start position P is fused to the already wound resin film 12 by the fusion member 25, the resin film 12 is partially cut in the width direction by the cutter 30. In this invention, the resin film 12 is partially cut in the width direction by the cutter 30 and then the resin film 12 in the vicinity of the winding start position P is fused by the fusion member 25. You may make it fuse | melt. In the above-described embodiment, the winding speed of the winding drum 11 is made larger than the traveling speed of the resin film 12 by rotating the winding drum 11 when the traveling of the resin film 12 is stopped. In the present invention, the winding speed of the winding drum 11 may be made larger than the traveling speed of the resin film 12 by rotating the winding drum 11 at a high speed when the resin film 12 is being unwound from the film roll 13 at a low speed. Further, in the above-described embodiment, the present invention is used when the resin film 12 as a liner is wound around the winding drum 11 together with the belt-shaped member 15, but the present invention is used when the resin film immediately after extrusion is wound around the winding drum. Alternatively, the resin film can be unwound from a large roll film roll and divided into small roll film rolls.
[0017]
【The invention's effect】
As described above, according to the present invention, the work efficiency can be improved while being inexpensive.
[Brief description of the drawings]
FIG. 1 is a schematic side view showing an embodiment of the present invention.
FIG. 2 is a side view illustrating an operation state.
FIG. 3 is a side view illustrating an operation state.
FIG. 4 is a side view illustrating an operation state.
[Explanation of symbols]
11 ... winding drum 12 ... resin film
15 ... strip member 16 ... winding device
25 ... Fusing member 26 ... Contact / separation means
30 ... Cutter P ... Winding start position

Claims (4)

A step of causing the thermoplastic resin film hanging from the fusion member to approach the winding drum together with the fusion member by positioning the start end portion beyond the fusion member; and The process of heating and fusing while pressing the winding drum, the step of separating the fusion member from the winding drum, the step of rotating the winding drum to wind the resin film around the winding drum, and the melting of the resin film in the vicinity of the winding start position. A process of cutting the resin film in the width direction on the upstream side from the winding start position and partially cutting by rotating the winding drum while heating and fusing the resin film while being pressed against the already wound resin film by the attaching member Wind the resin film around the drum until the part that has been passed over the fusion member And by rotating the winding drum in a state where the winding speed of the winding drum is larger than the traveling speed of the resin film, the resin film is separated at the partially cut portion and formed by the separation. A method of winding a thermoplastic resin film, comprising: a step of hanging a starting end portion of a resin film from a fusion member. The method for winding a thermoplastic resin film according to claim 1, wherein when the resin film is wound around the winding drum, the belt-shaped member is wound while being sandwiched between the resin films. The method for winding a thermoplastic resin film according to claim 1, wherein the winding speed of the winding drum is made larger than the traveling speed of the resin film by rotating the winding drum when the traveling of the resin film is stopped. It is arranged in the vicinity of the winding start position where the winding of the thermoplastic resin film around the winding drum starts, and the resin film can be fused to the winding drum or the already wound resin film by heating while pressing the resin film. A fusion member, contact / separation means for approaching and separating the fusion member from the winding drum, and a cutter for partially cutting the resin film in the width direction on the upstream side from the winding start position. When the winding of the film is completed, the resin film in the vicinity of the winding start position is fused to the already wound resin film by the fusion member, and the resin film is partially cut in the width direction by the cutter on the upstream side from the winding start position. After that, the part that was partially cut by rotating the winding drum The resin film is wound around the winding drum until it exceeds the fusion member, and then the resin film is separated at the partially cut portion, and the starting end portion of the resin film formed by the separation is melted. A thermoplastic resin film wrapping device characterized in that it hangs down from a wearing member.

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