JP2007175983A - Sheet film molding roll - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet film molding roll usable in a general existing sheet/film molding apparatus without complicating the structure of a drive system even in the case of rotary driving. <P>SOLUTION: The sheet film molding roll is constituted so as to be provided with an inner cylinder member 20, which has elastic cylindrical shaft parts 21 and 22 at both ends thereof and are rotatably supported between both shaft parts in the state made rotatable through the bearing parts 26 and 27 by the shaft parts 21 and 22, the eccentric side plates 53 and 54 rotatably mounted on the shaft parts 21 and 22 of both ends of the inner cylinder member 20 and the metal elastic outer cylinder 50 which is rotatably supported by the eccentric side plates 53 and 54, has an inner diameter larger than the outer diameter of the inner cylinder member 20 and has a cylindrical metal elastic outer cylinder 50 having an inner diameter larger than the outer diameter of the inner cylinder member 20 and is provided with a thin-walled structure wherein the inner cylinder member 20 is housed in a cylinder 68 and an inner peripheral surface 50A comes into contact with the outer peripheral surface 27A of the rubber roll 27 of the inner cylinder member 20. The rotation of the inner cylinder member 20 is transmitted to the metal elastic outer cylinder 50 by the meshing of inner gears 32 and 33 with outer gears 34 and 35. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a sheet / film forming roll, a metal elastic outer cylinder, and a sheet / film forming apparatus , and more particularly to a touch roll suitable for forming a thin film sheet.

  As a sheet / film forming method, a touch roll type is known in which molten resin is supplied from a T-die between a pair of main roll and sub roll (touch roll) to form a sheet / film continuously. .

  As a touch roll used for this type of sheet / film molding, a double structure of an outer cylinder and an inner cylinder, and an outer cylinder made of a thin structure made of metal and crowned on the outer shape of the roll (for example, Patent Document 1), There is a double structure of an outer cylinder and an inner cylinder, and the outer cylinder has a thin metal structure, and the outer cylinder is elastically deformed following the outer peripheral surface of the main roll by a pressing load on the main roll (for example, Patent Document 2). ).

  In addition, a thin metal outer cylinder is attached to a non-rotating center support shaft so that it can rotate in a concentric state, and a rubber roll is attached to the center support shaft in an eccentric state so that it can rotate in an eccentric state. The outer peripheral surface of the roll is in contact with the inner peripheral surface of the thin metal outer cylinder, and the elastic deformation of the thin metal outer cylinder due to the pressing load on the main roll is handled by the rubber-like elasticity of the rubber roll (internal pressure support) ( For example, Patent Document 3).

In the case of a rubber roll inscribed type that supports internal pressure of a thin metal outer cylinder with a rubber roll, the thin metal outer cylinder is elastically deformed following the outer peripheral surface of the main roll by a pressing load against the main roll. As in the touch roll shown in FIG. 2, it is possible to form a thinner sheet / film than a case in which the outer cylinder has a thin metal structure.
JP 2002-36332 A Japanese Patent No. 3194904 Japanese Patent No. 3422798

  However, in the rubber roll inscribed type sheet / film forming roll as shown in Patent Document 3, since the center support shaft is a non-rotating shaft, when rotating the forming roll, a thin metal outer cylinder and The thin metal outer cylinder must be rotationally driven by drivingly connecting with an electric motor, the drive system structure becomes complicated, and it cannot be used for a general existing sheet / film forming apparatus.

  The problem to be solved by the present invention is that even when the forming roll is rotationally driven, the drive system structure is not complicated, and can be used in a general existing sheet / film forming apparatus. It is to ensure that rotation by speed is performed.

  The sheet film forming roll according to the present invention has shaft portions at both ends, an elastic cylinder between the shaft portions, an inner cylinder member rotatably supported by a bearing portion with the shaft portions, The inner cylinder member has an inner diameter larger than the outer diameter of the inner cylinder member, accommodates the inner cylinder member in the cylinder, and is arranged eccentrically with respect to the inner cylinder member so that the inner circumferential surface contacts the outer circumferential surface of the inner cylinder member A thin-walled metal elastic outer cylinder, and a gear mechanism for transmitting the rotation of the inner cylinder member to the metal elastic outer cylinder.

Further, the sheet / film forming roll according to the present invention has shaft portions at both ends, and has an elastic cylindrical body made of an elastic body between the both shaft portions, and is rotatably supported by the bearing portion with the shaft portion. An inner cylinder member, and an eccentric side plate rotatably attached to each of the shaft portions at both ends of the inner cylinder member;
A thin wall that is rotatably supported by the eccentric side plate, has an inner diameter larger than the outer diameter of the inner cylinder member, accommodates the inner cylinder member in a cylinder, and has an inner peripheral surface in contact with the outer peripheral surface of the inner cylindrical member A cylindrical metal elastic outer cylinder having a structure, and a gear mechanism for transmitting the rotation of the inner cylinder member to the metal elastic outer cylinder.

  In the sheet / film forming roll according to the present invention, preferably, the gear mechanism is engaged with an internal gear attached to a shaft portion of the inner cylinder member and an inner gear attached to the metal elastic outer cylinder. It is constituted by a ring-shaped external gear.

  In the sheet / film forming roll according to the present invention, preferably, the shaft portion of the inner cylinder member is drivingly connected to an electric motor, and the inner cylinder member is rotationally driven by the electric motor.

  Also, in the sheet / film forming roll according to the present invention, preferably, the elastic cylinder is constituted by a metal cylindrical member and a rubber roll made of a rubber-like elastic body attached to an outer peripheral surface of the metal cylindrical member. The outer peripheral surface of the rubber roll is in contact with the inner peripheral surface of the metal elastic outer cylinder.

  In addition, the sheet / film forming roll according to the present invention preferably has a rotation preventing portion for preventing the eccentric side plate from rotating, and the rotation preventing portion has a structure capable of variably setting the rotation preventing position in the circumferential direction of the eccentric side plate. It has become.

  The metal elastic outer cylinder according to the present invention is a thin-walled metal elastic outer cylinder used for the sheet / film forming roll according to the invention described above.

  In the sheet / film forming apparatus according to the present invention, the sheet / film forming roll according to the above-described invention is applied as a touch roll.

  In the sheet / film forming roll according to the present invention, since the metallic elastic outer cylinder is eccentrically arranged with respect to the inner cylinder member rotatably supported by the bearing portion by the shaft portions at both ends, the shaft portion of the inner cylinder member is arranged. The rotation of the inner cylinder member can be transmitted to the metal elastic outer cylinder by a gear mechanism by being connected to the electric motor.

  As a result, the sheet / film forming roll according to the present invention can be used as it is in a general existing sheet / film forming apparatus without complicating the drive system structure even when the roll is driven to rotate. The elastic outer cylinder is reliably rotated at a predetermined speed.

  First, an outline of a sheet / film forming method using the sheet / film forming roll according to the present invention will be described with reference to FIG. In this sheet / film forming method, a molten resin M is supplied from a T die 100 between a pair of a main roll 101 and a sub roll (touch roll) 102 to form a sheet / film F continuously. The sheet / film forming roll according to the present invention is applied to a secondary roll (touch roll) 102.

  One embodiment of a sheet / film forming roll according to the present invention will be described with reference to FIGS.

  The sheet / film forming roll 10 includes an inner cylinder member 20 and a metal elastic outer cylinder 50.

  The inner cylinder member 20 includes a shaft member 21 on the operation side (right side in FIGS. 1 and 2), a shaft member 22 on the drive side (left side in FIGS. 1 and 2), and the shaft members 21 and 22. It is comprised by the elastic cylinder 25 fixedly attached to the flange parts 23 and 24 integrally formed in the front-end | tip. The shaft members 21 and 22 are concentrically arranged, and the elastic cylinder 25 is located between the left and right flange portions 23 and 24 opposite to each other and is fixedly connected to the flange portions 23 and 24 at both ends, and is concentric with the shaft members 21 and 22. It has become.

  The elastic cylinder 25 includes a metal cylindrical member 26 whose both ends are welded to the flange portions 23 and 24, and a rubber roll 27 attached to the outer peripheral surface of the metal cylindrical member 26. The rubber roll 27 is made of a rubber-like elastic material such as silicon rubber or ethylene propylene rubber, and is attached to the entire outer peripheral surface of the metal cylindrical member 26.

  The inner cylinder member 20 is rotatably supported by the operation side bearing portion 90 and the drive side bearing portion 91 with shaft members (shaft portions) 21 and 22, and is rotatable about its own central axis. That is, the operation-side bearing portion 90 and the drive-side bearing portion 91 rotatably support the shaft members 21 and 22 at both ends of the inner cylinder member 20 by the bearing members 92 and 93.

  The driving-side shaft member 22 is drivingly connected to an electric motor (electric motor) 31 by a coupling 30. Thereby, the inner cylinder member 20 is drivingly connected to the electric motor 31 and is rotationally driven by the electric motor 31.

  The shaft members 21 and 22 of the inner cylinder member 20 rotatably support the disk-shaped eccentric side plates 53 and 54 by means of rolling bearings 51 and 52, respectively. The centers Cb of the eccentric side plates 53 and 54 are eccentric with respect to the center Ca of the inner cylinder member 20 with an eccentricity e (see FIG. 4).

  The metal elastic outer cylinder 50 is a cylindrical body made of a thin metal plate such as stainless steel, and has a flexible thin wall structure. Ring-shaped end members 81 and 82 are integrally attached to both ends. Yes. Ring-shaped gear attachment members 83 and 84 are integrally attached inside the end members 81 and 82, respectively.

  The eccentric side plates 53 and 54 rotatably support the gear mounting members 83 and 84 by rolling bearings 55 and 56, respectively, on the outer peripheral surface portion. As a result, both ends of the metal elastic outer cylinder 50 are rotatably supported from the eccentric side plates 53 and 54 by the rolling bearings 55 and 56 via the end members 81 and 82 and the gear mounting members 83 and 84.

  The metal elastic outer cylinder 50 has an inner diameter Rb (see FIG. 3) sufficiently larger than the outer diameter Ra of the rubber roll 27 of the inner cylinder member 20, and the rubber roll 27 is accommodated in the cylinder 68, Due to the eccentricity, the inner peripheral surface 50 </ b> A is in contact with the outer peripheral surface 27 </ b> A of the rubber roll 27 on the eccentric approach side (right side as viewed in FIG. 3).

  In an unloaded state, the outer peripheral surface 27A of the rubber roll 27 and the inner peripheral surface 50A of the metal elastic outer cylinder 50 are not in contact, and the outer peripheral surface 27A of the rubber roll 27 and the inner peripheral surface of the metal elastic outer cylinder 50 are not in contact. 50A, there is a gap between the outer peripheral surface 27A of the rubber roll 27 and the inner peripheral surface 50A of the metallic elastic outer cylinder 50 by elastic deformation of the metallic elastic outer cylinder 50 due to contact with the main roll 101. May come into contact. This facilitates the assembly of the inner cylinder member 20 to which the rubber roll 27 is attached and the metal elastic outer cylinder 50.

  Internal gears (pinions) 32 and 33 are fixedly mounted on the outer peripheral portions of the shaft members 21 and 22 of the inner cylinder member 20, respectively. Ring-shaped external gears 34 and 35 are fixedly mounted on the gear mounting members 83 and 84 integral with the metal elastic outer cylinder 50 concentrically with the metal elastic outer cylinder 50, respectively. The internal gears 32 and 33 and the external gears 34 and 35 are meshed with each other on the eccentric approach side (the right side in FIG. 3). By this engagement, the rotation of the shaft members 21, 22, that is, the rotation of the inner cylinder member 20 is transmitted to the metal elastic outer cylinder 50.

  The internal gears 32 and 33 and the external gears 34 and 35 may be provided outside the cylinder instead of the cylinder 68.

  When the number of teeth of the internal gears 32 and 33 is Za, the number of teeth of the external gears 34 and 35 is Zb, the outer diameter of the rubber roll 27 is Ra, and the inner diameter of the metal elastic outer cylinder 50 is Rb, Za = Zb (Rb / Ra), the peripheral speed of the outer peripheral surface of the rubber roll 27 and the peripheral speed of the inner peripheral surface of the metal elastic outer cylinder 50 become the same, and the outer peripheral surface of the rubber roll 27 and the metal elastic outer cylinder are set. The metallic elastic outer cylinder 50 is forcibly driven to rotate without causing any slip between the inner circumferential surface 50 and the inner circumferential surface.

  The eccentric side plates 53 and 54 are connected to the operation side bearing portion 26 and the drive side bearing portion 27 by the rotation preventing portions 57 and 58, respectively, and are prevented from rotating. By the rotation prevention, the eccentric direction of the eccentric side plates 53 and 54 with respect to the inner cylinder member 20 and the rubber roll 27 is determined. As shown in FIG. 3, the eccentric direction is set so that the side of the sheet / film forming roll (touch roll) 10 facing the main roll 101 is the eccentric approaching side (right side in FIG. 3). Has been. In other words, the eccentric direction is set so that the center Ca of the inner cylinder member 20 is positioned closer to the main roll 101 than the center Cb of the eccentric side plates 53 and 54 (see FIG. 4).

  Thereby, the rubber roll 27 is in contact with the inner peripheral surface 50 </ b> A of the metal elastic outer cylinder 50 on the side where the metal elastic outer cylinder 50 is pressed against the main roll 101 (right side in FIG. 3).

  As shown in FIG. 4, the anti-rotation portions 57 and 58 are attached to the protruding piece 59 fixedly attached to the eccentric side plates 53 and 54, and to the operation side bearing portion 26 and the drive side bearing portion 27. The adjustment screws 62 and 63 are screw-engaged with the pieces 60 and 61. The adjustment screws 62 and 63 sandwich the projecting piece 59 from both sides to prevent the eccentric side plates 53 and 54 from rotating.

  Further, by adjusting the screwing amounts of the adjusting screws 62 and 63, the pinching position of the protruding piece 59 can be changed in the circumferential direction of the eccentric side plates 53 and 54 (clockwise direction and counterclockwise direction). Thereby, the rotation stop position of the circumferential direction of the eccentric side plates 53 and 54 can be variably set. Thus, the amount of eccentricity on the pressing side of the metal elastic outer cylinder 50 with respect to the main roll 101 can be increased or decreased.

  Seal members 64 and 65 are attached between the shaft members 21 and 22 of the inner cylinder member 20 and the eccentric side plates 53 and 54, and the gear attachment members 83 and 84 of the eccentric side plates 53 and 54 and the metal elastic outer cylinder 50 are attached. Between them, seal members 66 and 67 are attached. Thereby, the cylinder interior 68 of the metal elastic outer cylinder 50 has a liquid-tight structure.

  A central hole 69 is formed in the shaft member 21 on the operation side. A tube 70 is inserted into the center hole 69, and a heat medium supply passage 71 and a heat medium discharge passage 72 are formed inside and outside the tube 70. The heat medium supply passage 71 and the heat medium discharge passage 72 are connected to a fixed-side cooling water supply nipple and a cooling water discharge nipple, respectively, by a double-structure rotary joint (not shown) attached to the shaft end of the shaft member 21. Has been.

The heat medium supply passage 71 is spanned between the flange portions 23 and 24, and extends to the in-tube passage 74 of the tube 73 extending across the central portion of the inner cylinder member 20 in the axial direction, and to the drive-side shaft member 22. The heat medium supply holes 75 and 76 that are formed communicate with one end side (left end side) of the cylinder interior 68 of the metal elastic outer cylinder 50. Heating medium discharge passage path 72 is communicated with the heating medium discharge hole passage 77 formed in the shaft member 21 the other end of the cylinder 68 of the metallic elastic external cylinder 50 (right end side).

  The cooling water is supplied from a cooling water supply nipple (not shown) through the rotary joint, the heat medium supply passage 71, the pipe passage 74, the heat medium supply hole 75, and the metal elastic outer cylinder 50 from the heat medium supply hole 76. It is supplied to one end side of the inner 68. Thereby, the cylinder 68 of the metal elastic outer cylinder 50 is filled with the cooling water. The cooling water in the cylinder 68 flows from the one end side to the other end side in the cylinder 68, enters the heat medium discharge passage 72 through the heat medium discharge hole 77, and flows to the rotary joint and the cooling water discharge nipple (not shown) to the outside. To be discharged.

The sheet / film forming roll 10 having the above-described configuration is arranged around its own central axis (the center Ca is the center of rotation) in a state where the inner cylinder member 20 is supported by the electric motor 31 from the operation side bearing portion 90 and the drive side bearing portion 91. Rotation).

  The rotation of the inner cylinder member 20 is transmitted to the metal elastic outer cylinder 50 by the engagement of the internal gears 32 and 33 and the outer gears 34 and 35, so that the metal elastic outer cylinder 50 is rotatable by the eccentric side plates 53 and 54. It is supported and rotates around its own central axis while the rubber roll 27 is inscribed.

  Since the rotation drive of the metal elastic outer cylinder 50 is a gear-type forced drive, the metal elastic outer cylinder 50 rotates in synchronization with the rotation of the inner cylinder member 20 reliably, and the metal elastic outer cylinder 50 is rotated. And the rubber roll 27 does not slip.

  Since the sheet / film forming roll 10 is of a rubber roll inscribed type in which the inner pressure of the metal elastic outer cylinder 50 is supported by the rubber roll 27 from the inside, the metal elastic outer cylinder 50 is pressed by the pressing load on the main roll 101. It is good to be elastically deformed following the outer peripheral surface of the main roll 101, and it is possible to form a thinner sheet / film than the one in which the outer cylinder has a thin metal structure.

In addition, the sheet / film forming roll 10 can be driven in the same manner as in the conventional sheet / film forming roll by simply connecting the electric motor 31 to the shaft member 22 supported by the driving side bearing portion 91. It can be rotationally driven by the mechanism, and can be used as it is in a general existing sheet / film forming apparatus without complicating the structure of the drive system.

  Further, since the eccentric support portion is constituted by the eccentric side plates 53 and 54 that form the side end plates of the metal elastic outer cylinder 50, maintenance of the rolling bearings 51, 52, 55, and 56 and the seal members 64, 65, 66, and 67 is performed. Inspection and parts replacement can be performed at the roll side end without disassembling the whole, and it is excellent in maintainability.

  Further, since the amount of eccentricity can be adjusted by the adjusting screws 62 and 63 of the non-rotating portions 57 and 58, the adjustment for compensating the wear of the rubber roll 27 can be easily performed, and the internal pressure is supported by the wear of the rubber roll 27. Even if a deviation occurs in the pressing pressure distribution, an adjustment to eliminate it can be performed even during use.

  The rubber roll 27 of the inner cylinder member 20 in the sheet / film forming roll according to the present invention is not essential, and in forming a sheet / film that is not so thin, the elastic cylinder 25 is only a metal cylinder that can be elastically deformed. It may be configured.

It is sectional drawing which shows one Embodiment of the sheet | seat film forming apparatus incorporating the sheet | seat film forming roll by this invention. It is sectional drawing which expands and shows the principal part of one Embodiment of the sheet | seat film forming roll by this invention. It is line AA expanded sectional drawing of FIG. FIG. 3 is an enlarged sectional view taken along line BB in FIG. 1. It is explanatory drawing which shows the outline | summary of the sheet | seat film forming method using the sheet | seat film forming roll by this invention.

Explanation of symbols

10 Sheet / film forming roll 20 Inner cylinder member 21, 22 Shaft member (shaft portion)
23, 24 Flange 25 Elastic cylinder 26 Metal cylindrical member 27 Rubber roll 27A Outer peripheral surface 30 Coupling 31 Electric motor 32, 33 Internal gear 34, 35 External gear,
DESCRIPTION OF SYMBOLS 50 Metal elastic outer cylinder 50A Inner peripheral surface 51, 52 Rolling bearing 53, 54 Eccentric side plate 55, 56 Rolling bearing 57, 58 Non-rotating part 59 Projection piece 60, 61 Mounting piece 62, 63 Adjustment screw 64, 65, 66, 67 Seal member 68 In-cylinder 69 Center hole 70 Pipe 71 Heat medium supply passage 72 Heat medium discharge passage 73 Pipe 74 Pipe internal passage 75, 76 Heat medium supply hole 77 Heat medium discharge hole 81, 82 End member 83, 84 Gear mounting member 90 Operation side bearing part 91 Drive side bearing part 92, 93 Bearing member
100 T-die 101 Main roll 102 Sub roll (touch roll)

Claims (6)

An inner cylinder member having a shaft part at both ends, an elastic cylinder between the two shaft parts, and being rotatably supported by the bearing part with the shaft part;
The inner cylinder member has an inner diameter larger than the outer diameter of the inner cylinder member, accommodates the inner cylinder member in a cylinder, and is arranged eccentrically with respect to the inner cylinder member so that the inner circumferential surface becomes the outer circumferential surface of the inner cylinder member. A thin-walled metal elastic outer cylinder in contact;
A gear mechanism for transmitting rotation of the inner cylinder member to the metal elastic outer cylinder;
A sheet / film forming roll. There are shaft portions at both ends, an elastic cylindrical body made of an elastic body is provided between the shaft portions, and an inner cylinder member that is rotatably supported by the bearing portion with the shaft portion, and the both ends of the inner cylinder member An eccentric side plate rotatably mounted on each of the shaft portions;
A thin wall that is rotatably supported by the eccentric side plate, has an inner diameter larger than the outer diameter of the inner cylinder member, accommodates the inner cylinder member in a cylinder, and has an inner peripheral surface in contact with the outer peripheral surface of the inner cylindrical member A cylindrical metal elastic outer cylinder having a structure;
A gear mechanism for transmitting rotation of the inner cylinder member to the metal elastic outer cylinder;
A sheet / film forming roll.   The said gear mechanism is comprised by the internal gear attached to the axial part of the said inner cylinder member, and the ring-shaped external gear which is attached to the said metal elastic outer cylinder and meshes with the said internal gear. The sheet / film forming roll according to 1.   The sheet / film forming roll according to any one of claims 1 to 3, wherein the shaft portion of the inner cylindrical member is drivingly connected to an electric motor, and the inner cylindrical member is rotationally driven by the electric motor.   The elastic cylinder includes a metal cylindrical member and a rubber roll made of a rubber-like elastic body attached to the outer peripheral surface of the metal cylindrical member, and the metal elastic outer cylinder has an outer peripheral surface of the rubber roll. The sheet / film forming roll according to any one of claims 1 to 4, which is in contact with the inner peripheral surface of the sheet.   The rotation prevention part which stops the rotation of the eccentric side plate has a structure which can variably set the rotation stop position of the circumferential direction of the eccentric side plate. Sheet film forming roll.

Images