KR20120130139A - Roll for sheet forming and method for sheet forming - Google Patents

Abstract

PURPOSE: A sheet forming roll and a sheet forming method are provided to form the rigidity and the flexibility of an outer shell variously. CONSTITUTION: A sheet forming roll comprises an outer shell(5) and an inner shell(6). The outer shell presses a seat(2). The temperature of the outer shell is maintained by temperature-control fluid(7) circulating through a space. A female thread or ring-shaped recessed portion(12) is formed in the outer shell and the exterior of the outer shell is extended outside. The depth of the recessed portion is over 0.1 times of the thickness of the outer shell in a diameter direction. [Reference numerals] (12) Recessed portion; (12p) Recessed forming portion; (13) Small recess portion; (14) Seat edge; (15) Crown forming portion; (17) Taper; (2) Seat; (20a,20b) Guide wall; (2p) Seat contact portion; (5) Outer shell; (6) Inner shell; (7) Temperature-control fluid; (8a,8c,8d,8e) Flow path; (9) Shaft

Description

ROLL FOR SHEET FORMING AND METHOD FOR SHEET FORMING

The present invention relates to a sheet forming roll and a sheet forming method for forming a long sheet.

As a molding method of a sheet, a pressure molding method is known in which a molten resin extruded from a T die is sandwiched between a pair of high rigidity sheet forming rolls and pressed to form a sheet. In the pressure molding method, molten resin can be molded into a sheet in a state in which an appropriate viscosity is maintained by controlling the outer circumferential temperature of the roll for sheet molding.

As a roll for sheet forming which has a temperature control function, Patent Literature 1 discloses a double tube roll having a thin cylindrical outer shell and an inner shell disposed inside the outer shell. The temperature of the outer periphery of the outer shell, that is, the outer periphery of the double tube roll, is controlled by flowing a warm bath liquid in the space formed between the outer shell and the inner shell.

Moreover, in the roll for sheet shaping | molding disclosed by patent document 1, an outer shell can be elastically deformed by using the outer shell of a thin metal body, and the time which the sheet | seat which becomes a shaping | molding object is sandwiched between the rolls for sheet shaping can be lengthened. have. By configuring the outer shell of both or one sheet forming roll with the outer shell which can elastically deform, the outer shell can be elastically deformed along the outer circumferential surface of the corresponding sheet forming roll at the time of pressing the sheet. Therefore, compared with the case of a pair of high rigidity sheet forming rolls, the time which a sheet | seat fits into a forming roll becomes long, and a sheet can be shape | molded more smoothly.

Patent Literature 2 and Patent Literature 3 disclose a double tube roll in which a rubber roll is used as the inner shell and the outer shell is further thinned. As a thin outer cell in which elasticity is insufficient and pressure cannot be applied to the sheet, since the outer circumferential surface of the rubber roll contacts the inner circumferential surface of the outer shell, pressure is applied to the sheet by the elastic force of the rubber roll. Since the foreign cell can be thinned, the temperature of the temperature can be improved. In addition, a thinner sheet can be formed.

Japanese Patent No. 3194904 Japanese Patent No. 3422798 Japanese Unexamined Patent Publication No. 2007-83577

However, in the roll for sheet shaping | molding disclosed by patent document 1, in order to ensure elasticity, there existed a limit of the size in thinning the outer shell. When the outer shell is made thin, the warp of the outer shell increases. Therefore, since the amount of crowns formed in advance in the outer shell increases and the outer shell is thin, it is difficult to maintain the cylindrical shape, and it is difficult to enlarge the roll for sheet forming.

Moreover, in the roll for sheet shaping | molding disclosed by patent document 2 and patent document 3, since the rubber roll was used for the inner back-up roll, there existed a subject of inferior durability.

In addition, in the conventional sheet-forming roll having a flat inner surface of the outer shell, the swirl effect due to turbulence is small and the heat transfer efficiency is low. Therefore, there was a limit to the cooling performance of the outer shell.

Therefore, the present invention makes it possible to mold a thin double-sided touch sheet having a thickness of about 0.1 mm by a sheet forming roll having a width of 2 m or more, and is excellent in durability and for sheet molding having a high temperature adjustment capability. The purpose is to provide a roll. Moreover, an object of this invention is to obtain the roll for sheet shaping | molding whose rigidity or flexibility of the outer shell comprised thinly differs with respect to the axial direction of the roll for sheet shaping | molding.

In order to achieve the object mentioned above, the roll for sheet molding which concerns on this invention is equipped with the cylindrical outer cell for pressure-molding a sheet, and the inner cell which is arrange | positioned inside the outer cell and has an outer diameter smaller than the inner diameter of the outer cell. In the sheet forming roll in which the outer shell is warmed by a warming fluid that flows through the space between the outer shell and the inner shell, a female-threaded or ring-shaped recess is formed on the inner circumferential surface of the outer shell, which extends along the circumference of the outer shell. . The depth of the recess is at least 0.1 times the radial thickness of the outer shell.

Moreover, the other sheet shaping | molding roll which concerns on this invention is provided with the cylindrical outer cell for pressure-molding a sheet | seat, and the cylindrical inner cell arrange | positioned inside the outer cell and which has an outer diameter smaller than the inner diameter of the outer cell. The outer shell is a sheet forming roll in which the outer shell is warmed by a warming fluid that flows through the space between the outer shell and the inner shell, and a female threaded or ring-shaped recess is formed on the inner circumferential surface of the outer shell extending along the circumference of the outer shell. The pitch of a recess is 10 times or less of the thickness of the outer shell in the bottom surface of the recess.

Moreover, the other sheet shaping | molding roll which concerns on this invention is equipped with the cylindrical cell for pressure-molding a sheet, and the shaft which supports a cell. A sheet forming roll in which a cell is warmed by a warming fluid that flows through a space between an inner circumferential surface and a shaft of the cell, and a female threaded or ring-shaped recess is formed on the inner circumferential surface of the cell and extends along the circumference of the cell. The depth of the recess is at least 0.1 times the radial thickness of the outer shell.

Moreover, the other sheet shaping | molding roll which concerns on this invention is equipped with the cylindrical cell for pressure-molding a sheet, and the shaft which supports a cell. A sheet forming roll in which a cell is warmed by a warming fluid that flows through a space between an inner circumferential surface and a shaft of the cell, and a female threaded or ring-shaped recess is formed on the inner circumferential surface of the cell and extends along the circumference of the cell. The pitch of the recess is 10 times or less of the radial thickness of the cell at the bottom of the recess.

Moreover, the sheet shaping | molding method which concerns on this invention forms a sheet | seat by sandwiching molten resin between the rolls for sheet forming of this invention.

According to the present invention, a roll for forming a large sheet having a wide width can be produced for forming a relatively thin sheet. In addition, the temperature of the bath can be improved without reducing the durability of the roll for sheet forming. Moreover, the roll for sheet shaping | molding in which the rigidity or flexibility of the outer shell comprised thin with respect to the radial direction differs with respect to an axial direction is obtained.

1 is a schematic view showing a sheet forming apparatus.
It is sectional drawing which shows the roll for sheet forming.
3A is a detailed cross-sectional view showing a roll for forming a sheet in the first embodiment.
It is a schematic diagram which shows the guide wall formed in the inner cell of the roll for sheet formation in 1st Embodiment.
It is sectional drawing which cuts and shows the sheet | seat roll from the surface orthogonal to an axial direction.
5 is a cross-sectional view showing a roll for forming a sheet when linear pressure is applied.
It is a figure for demonstrating the relationship of the direction which a recess extends, and the ease of bending of a thin plate.
It is sectional drawing which shows the state which sandwiched the sheet | seat between the rolls for sheet formation.
FIG. 8 is a diagram showing a bending curve in comparison with the sheet forming roll of the present embodiment and a conventional sheet forming roll. FIG.
It is sectional drawing which shows the shape of the roll for sheet formings compared with FIG.
10 is a detailed cross-sectional view showing a roll for forming a sheet in a second embodiment.
It is sectional drawing which shows the outer shell in 3rd and 4th embodiment.
It is sectional drawing which shows the structural example of the depth of the square recessed part which the outer shell in 4th Embodiment has.
It is sectional drawing which shows the structural example of the pitch of the square recessed part which the outer shell in 4th Embodiment has.
It is a figure for demonstrating the process of processing a recessed part in the outer cell in 5th Embodiment.
It is sectional drawing which shows the shape of the recessed part which the outer shell in 6th Embodiment has.
It is sectional drawing which shows the roll for sheet formation of 7th Embodiment.
It is sectional drawing which shows the roll for sheet formation of 8th Embodiment.

EMBODIMENT OF THE INVENTION The form for implementing this invention is demonstrated in detail with reference to drawings.

In this specification, "linear pressure" means the force per unit length of the roll axial direction when pressing a pair of rolls (for example, 100 N / cm). Linear pressure is also called nip pressure.

In addition, "crown" refers to the shape in which the axial center part of a roll is thicker than the axial edge part of a roll. "Crown amount" refers to the diameter difference between the diameter of the axial center portion of the roll and the axial end of the roll, and when the diameter of the axial center portion of the roll is D1 and the diameter of the axial end of the roll is D2, Crown amount = D1-D2.

EMBODIMENT OF THE INVENTION Hereinafter, although an Example demonstrates this invention in detail, this invention is not limited at all by this. In addition, in the following description, the same code | symbol is attached | subjected and demonstrated to the same part as what was shown by embodiment mentioned above.

(First Embodiment)

The schematic diagram of the shaping | molding apparatus which press-forms a sheet | seat is shown in FIG. The sheet 2 formed by the molding apparatus 1 is a transparent clear sheet having a thickness ranging from about 0.05 mm to about 1 mm, and includes resins such as PC (Polycarbonate), PMMA (Polymethylmethacrylate), and PET (Polyechylene Terephthalate). It is molded using the material.

As shown in FIG. 1, the shaping | molding apparatus 1 is the sheet | seat shaping | molding roll which aligns the T die 3 for extruding a resin material into a sheet form, and the thickness and shape of the sheet | seat 2 (hereafter, a forming roll) (4a, 4b, and 4c) are provided. The forming rolls 4a, 4b and 4c have the same width with respect to the axial direction of the forming roll. The sheet is molded by applying linear pressure to the sheet 2 by the forming rolls 4a, 4b and 4c.

The T die 3 extrudes the resin material supplied from the extruder which is not shown in figure, and guides a resin material to the clearance gap of a pair of shaping | molding roll 4a and shaping | molding roll 4b. The T die 3 is provided in the downward direction in the vertical direction, and the forming rolls 4a and 4b are disposed and formed such that the gap between the forming roll 4a and the forming roll 4b is located below the T die 3. have.

Moreover, the shaping | molding roll 4a and the shaping | molding roll 4b are arrange | positioned in parallel mutually so that a molten resin may be interposed. The moldability of a resin material can be improved by accommodating the molten resin extruded in the perpendicular direction below by the pair of shaping | molding roll 4a and shaping | molding roll 4b.

The forming roll 4b is fixed in position, and the forming roll 4a can be moved in the direction (opening direction of a white arrow shown in FIG. 1) to open and close a gap with the forming roll 4b by a pressurization device (not shown). It is configured to. The shaping roll 4a and the shaping roll 4b are usually rotated at the same circumferential speed, and the sheet 2 is applied by applying a uniform pressure to the entire axial width of the shaping roll 4a and the shaping roll 4b. Mold to a certain thickness.

The sheet 2 is wound around the forming roll 4b after passing through the gap between the forming roll 4a and the forming roll 4b, and is conveyed to the downstream side in the conveying direction by the forming roll 4c as necessary. Moreover, similarly to the shaping | molding roll 4a, the shaping | molding roll 4c also can be moved to the direction (opening direction of a white arrow shown in FIG. 1) which opens and closes the clearance gap with the shaping | molding roll 4b by the pressurization apparatus not shown in figure. It is supposed to be done.

After passing through the forming roll 4c, the sheet 2 is cooled and wound onto a coil or cut into predetermined lengths. As needed, you may press-mold the sheet | seat 2 again using the shaping | molding roll 4c and another shaping | molding roll not shown.

Next, the structure of the shaping | molding roll 4a is demonstrated. In FIG. 2, sectional drawing (sectional drawing along the A-A line in FIG. 1) when the shaping | molding roll 4a is cut | disconnected in the surface which passes the center axis is shown.

As shown in FIG. 2, the shaping | molding roll 4a is a double tube roll provided with the cylindrical outer shell 5 formed from the thin metal body which has elasticity, and the inner shell 6 which has an outer diameter smaller than the inner diameter of the outer shell 5. As shown in FIG. to be. Therefore, a space is formed between the inner circumferential surface of the outer shell 5 and the outer circumferential surface of the inner shell 6, and a flow path 8c through which the warm bath liquid 7 as a warm bath fluid flows is formed. The outer shell 5 and the inner shell 6 shown in FIG. 2 are forced, and the forming roll 4a is also constructed by welding steel. In addition, a gas or a gas-liquid mixed fluid may be used instead of the warm bath liquid 7 as the warm bath fluid.

Moreover, the shaft 9 and the flange 10 are welded and joined to the both ends of the inner shell 6, and the shaft 9 is supported so that the bearing 11 can rotate. One end of the shaft 9 is connected to the motor 23, and the forming roll 4a is rotationally driven at a predetermined speed by the motor 23. Moreover, in the forming roll, the side to which the motor 23 is connected is made into the drive side, and the side located on the opposite side to this drive side is made into the operation side.

In addition, the bearing 11 is formed in the pressurizing apparatus which presses in the direction (direction of the white arrow shown in FIG. 1) which opens and closes the clearance gap between the shaping roll 4b and the shaping roll 4a via the bearing casing which is not shown in figure. It is. As a pressurization apparatus, a pneumatic or hydraulic cylinder type is used normally. The roll bearing casing is supported to be movable by the linear guide, and the forming roll can be moved in parallel.

In the shaft 9 on the operation side, a flow path 8a through which the warm bath liquid 7 flows, and a flow path 8e are formed around the flow path 8a. The flow path 8a passes through the center of the forming roll 4a from the shaft 9 on the operation side, and is formed on the shaft 9 on the drive side. Moreover, the flow path 8b which communicates the flow path 8a and the flow path 8c is formed in the flange 10 of a drive side, and the flow path 8c and the flow path 8e are similarly provided also to the flange 10 of an operation side. ), A flow path 8d is formed.

FIG. 3A shows a detailed cross-sectional view of the forming roll 4a shown in FIG. 2, which is expanded from the central portion in the axial direction over the operation side. In FIG. 3A, the center position of the axial length L of the forming roll is indicated by F. As shown in FIG. 3A, the recess 12 extending along the axis circumference of the outer shell 5 is formed on the inner circumferential surface of the outer shell 5. In 1st Embodiment, as the recessed part, the female-threaded groove | channel of which the cross-sectional shape orthogonal to the longitudinal direction in which the recessed part 12 extends forms a trapezoid is formed. Moreover, the recessed part 12 is comprised so that the one set screw formed with one continuous groove may be comprised.

Pitch P of the recessed part 12 adjacent to the axial direction of the outer shell 5 is an important dimension in order to acquire the flexibility of the outer shell 5, and it mentions later for details.

In the first embodiment, the pitch P of the recess 12 is 4 mm, the thickness of the outer shell 5 is 5 mm, and the flexibility of the outer shell 5 is perpendicular to the longitudinal direction in which the recess 12 extends. It has a different effect in the direction to which. This pitch P is also important from the viewpoint of thermal movement.

Pitch P of the adjacent recessed part 12 is good to be below the thickness of the outer shell 5 in the radial direction, in order to improve the uniformity of the temperature control capability in the outer peripheral surface of the outer shell 5. The temperature variation of the sheet 2 in contact with the forming roll 4a at the time of molding becomes small, and the crystallization variation of the sheet 2 is reduced.

Moreover, the recessed part 12p in which the recessed part 12 is formed is formed in the range larger than the sheet contact part (sheet width) 2p which the sheet | seat 2 contacts. In the part from the edge part of the recessed part 12p to the edge part of the sheet contact part 2p, the recessed part (henceforth a small recessed part 13) smaller than the recessed part 12 is formed.

The small concave portion 13 has a role of eliminating a sudden change in the thickness of the outer shell 5. Therefore, it is possible to suppress the stress concentration generated at the position where the thickness changes drastically and to prevent breakage of the outer shell 5. Moreover, the taper (not shown) which changed the inner peripheral surface of the outer shell 5 gently with respect to the axial direction of the outer shell 5 by gradually changing the radial thickness of the outer shell 5 as a substitute of the small recessed part 13 It may be formed.

The inner peripheral surface of the outer shell 5 is coated with a plated film in order to prevent corrosion of the forced outer shell 5. In particular, since the bottom surface of the concave portion 12 is thinly formed, it is important to prevent corrosion in order to maintain the mechanical strength of the cell for a long time, and Ni plating is performed in the first embodiment.

The depth D of the recessed portion 12 of the outer shell 5 of the forming roll of the present embodiment is 0.1 times or more the thickness t1 of the outer shell 5 (see FIG. 12). The pitch of the recesses 12 (the pitch between the recesses 12 adjacent to each other) P of the outer shell 5 of the roll of the present embodiment is 10 times or less the minimum thickness tt of the outer shell of the bottom surface of the recess 12 (FIG. 13).

The outer shell 5 is provided with a crown in a wider range than the sheet contact portion 2p (hereinafter, the range in which the crown is formed is referred to as a crown formation portion 15). The outer shell 5 was seized by the load at the time of forming the sheet 2. Thus, by forming the crown in advance, a uniform linear pressure is obtained in a state where a load is applied to the forming roll 4a.

In the first embodiment, the crown is not formed in the entire region of the outer shell 5. In the range where the crown from the edge part of the crown formation part 15 to the edge part of the outer shell 5 is not formed, the taper 17 which gradually reduces an outer diameter toward the edge part of the outer shell 5 is formed. By forming the taper 17, the end contact of the edge part of the shaping | molding roll 4a and the shaping roll 4b (FIG. 1) is avoided.

3A and 3B show the guide wall 20 formed in the inner shell 6. As shown in FIGS. 3A and 3B, the flow path 8c between the inner circumferential surface of the outer shell 5 and the outer circumferential surface of the inner shell 6 is disposed obliquely with respect to the axial direction along the axis circumference of the inner shell 6. A plurality of guide walls 20a are formed. The guide wall 20a is welded to the outer peripheral surface of the inner shell 6.

As shown in FIG. 3B, the guide wall 20a is formed in a round bar shape or a plate shape, and is distributed and arranged at regular intervals. Moreover, the flow resistance of the warm bath liquid 7 is suppressed by forming the cross section of the guide wall 20a thinly wedge-shaped. The warm bath liquid 7 is flowed through the whole roll by rectifying, dispersing, and stirring the warm bath liquid 7 which flows in the flow path 8c by this guide wall 20a.

In the first embodiment, as shown in FIG. 3B (a), a plurality of divided guide walls 20a are used, but as shown in FIG. 3B (b), a plurality of guides continuously formed in a spiral shape Wall 20b may be used. Moreover, although the guide wall 20a is formed by welding a round bar or a board | plate material to the outer peripheral surface of the inner shell 6, for example, as shown to FIG. 3B (c), the outer peripheral surface of the inner shell 6 is cut | disconnected. It may be formed integrally by processing. As for the cross section of the guide wall 20a, 20b which opposes the inner peripheral surface of the outer shell 5, the predetermined clearance gap S is ensured between the inner peripheral surfaces of the outer shell 5. In FIG.

Since the thickness of the outer shell 5 is thin, the inner shell 6 is formed thicker than the thickness of the outer shell 5 in order to maintain high rigidity of the entire forming roll, and the flange 10 at both ends of the inner shell 6 is formed. And the shaft 9 are welded together.

In FIG. 4, sectional drawing (C-C sectional drawing shown in FIG. 3A) of the shaping | molding roll 4a at the time of cut | disconnected at the surface parallel to the flange 10 of an operation side, and passing through the center of the flow path 8d is shown. As shown in FIG. 4, six flow paths 8d are formed in the flange 10 from the center of the flange 10 toward the outer periphery and at equal intervals from each other, and the flow path 8c and the flow path ( 8e) is in communication. The flange 10 on the drive side also has the same structure.

Temperature control of the outer periphery of the shaping | molding roll 4a is performed by returning the heat bath liquid 7 which flows through the flow path 8c. Cold water, hot water, etc. are used for the warm bath liquid 7, and flow volume is adjusted in order to control the outer periphery of the shaping | molding roll 4a to desired temperature. As shown in FIG. 2, the flow of the bath liquid 7 is first received from the outside by the rotary joint 16 provided on the shaft 9 on the operation side, and the flow path 8a formed at the center of the forming roll 4a is opened. Therefore, it flows toward the axis 9 of the drive side. Then, it flows into the flow path 8c through the flow path 8b formed in the flange 10 of the drive side, and reaches the operation side from the drive side along the inner peripheral surface of the outer shell 5.

As for the shaping | molding roll 4a, the recessed part 12 is formed in the inner peripheral surface of the outer shell 5, and the contact area with the heating liquid 7 becomes large compared with the case where the recessed part 12 is not formed. have. Therefore, the heat exchange between the outer shell 5 and the bath liquid 7 also increases.

On the outer circumferential surface of the inner shell 6, a guide wall 20 as a convex wall extending spirally along the axis circumference of the inner shell 6 is formed, and the guide wall 20 is the outer shell 5 and the inner shell 6. It is arrange | positioned at the clearance gap between. Since the guide wall 20 is arrange | positioned inclined spirally with respect to the axial direction of the inner cell 6, the warm-water liquid 7 disperse | distributes and turns in the flow path 8c, and flows in a spiral shape. As shown in FIG. 4, the flow path 8c communicates with the six flow paths 8d.

In the cross section on the operation side of the forming roll, similar to the cross section on the driving side, the heat bath liquid 7 passes through the six flow passages 8d, passes through the outer circumferential flow path of the rotary joint 16 on the operation side, Inflow. The temperature control device has a function of keeping the temperature of the temperature control solution 7 constant.

In addition, in the first embodiment, the turbulence flow occurs because the warm bath liquid 7 flows almost at right angles with respect to the extending direction of the recess 12. In general, turbulence is more likely to occur in the turbulent side than in laminar flow, and thus the heat transfer effect is high. Therefore, heat exchange is performed efficiently in 1st Embodiment in which the recessed part 12 was formed substantially perpendicular to the flow.

That is, in 1st Embodiment, the temperature control capability of the shaping | molding roll 4a is improved by the effect which enlarged the contact area and the effect which produces turbulence.

As mentioned above, since the flow path 8c of the outer shell 5 has the guide wall 20a arrange | positioned in the spiral form with respect to the axial direction of a shaping | molding roll, the heat bath liquid 7 commutates in a spiral direction, Dispersed and stirred. For this reason, the warm bath liquid 7 can flow evenly to the whole roll.

Moreover, when the flow path of the outer shell 5 has the guide wall 20b continuous in a spiral shape, as shown to (b) of FIG. 3B, since the guide wall 20b forms a double spiral structure, a substantial flow path The cross-sectional area becomes narrower, which makes it possible to increase the flow velocity of the bath liquid 7 to make it a turbulent state. For this reason, the effect which further raises the cooling capability by the warm bath liquid 7 and suppresses generation of temperature nonuniformity in a shaping | molding roll is acquired.

Moreover, in the shaping | molding roll of this embodiment, since the action of stirring the warm-water liquid 7 is acquired by the labyrinth effect by the recessed part 12 of the inner peripheral surface of the outer shell 5, guide wall 20a (20b) Combined with, the cooling capacity of the forming roll can be further increased.

In addition, as shown in FIG. 3A, the predetermined gap S formed between the outer circumferential surface of the guide walls 20a and 20b and the inner circumferential surface of the outer shell 5 is easily bent in the outer shell 5, which is a thin structure having elasticity. It is set larger than a general rigid roll. If this gap S is not secured, the elasticity of the outer shell 5 is not sufficiently secured, and thus the flexible sheet formability is lost.

In addition, the gap S is set to a dimension in which the inner circumferential surface of the outer shell 5 abuts against the guide walls 20a and 20b before permanent warpage occurs when excessive load is applied to the outer shell 5. ), The effect of preventing damage or deformation of the outer shell 5 is prevented.

Finally, it flows out from the shaping | molding roll 4a through the flow path 8e formed in the shaft 9 of the operation side from the flow path 8d formed in the flange 10 of the operation side. Thereafter, the warm bath liquid 7 enters the warm bath device (not shown) via the outer circumferential flow path. The temperature control device has a function of keeping the temperature of the temperature control solution 7 constant.

In this embodiment, the width | variety of the axial direction of the outer shell 5 which is a main dimension of the shaping | molding roll 4a, and the distance between the bearings 11 were 1400 mm and 1660 mm. The sheet contact portion 2p (FIG. 3A) was 1170 mm.

Moreover, the outer diameter and inner diameter of the outer shell 5 were set to 300 mm and 290 mm, and the thickness of the outer shell 5 was set to 5 mm. The outer diameter of the inner cell 6 was 270 mm, and the space | interval of the outer cell 5 and the inner cell 6, ie, the space | interval of the flow path 8c, was 10 mm. The inner diameter of the inner shell 6 was 230 mm, and the thickness of the inner shell 6 was 20 mm. The inner shell 6 is thicker than the outer shell 5 in order to maintain the rigidity of the entire forming roll 4a.

In addition, the pitch P of the recessed part 12 was 4 mm, and the depth of the recessed part 12 was 1.9 mm. The cross-sectional area ratio of the part removed by the formation of the recessed part 12 and the part left as a convex part by the formation of the recessed part 12 was 58%: 42%.

The sheet contact part 2p of the outer peripheral surface of the outer shell 5 performed mirror surface finishing, after plating chromium on the surface. In addition, a general arc shape R curve is used as the crown formed in the crown formation part 15. Moreover, in 1st Embodiment, the edge diameter of the outer shell 5 was set to 1 mm small with respect to the outer diameter of the edge part of the crown formation part 15 as the taper 17.

The shaping | molding roll 4a comprised as mentioned above is used for the use of shape | molding the thin sheet | seat 2 to 0.05 mm-about 1 mm in thickness, and the nip pressure required at the time of shaping | molding of the sheet | seat 2 is 100 N / cm.

Moreover, the shaping | molding roll 4b used as the counterpart of the shaping | molding roll 4a shown in FIG. However, the thickness of the outer shell 5 of the forming roll 4b is thicker than the thickness of the outer shell 5 of the forming roll 4a, and is hardly deformed by the assumed linear pressure (for example, 100 N / cm). . Therefore, since the forming roll 4b can be regarded as a rigid roll, no crown is formed.

The cross-sectional shape of the shaping | molding roll 4a when linear pressure is applied to the shaping | molding roll 4a by FIG. 5A by the shaping | molding roll 4b is shown. (A) of FIG. 5 can make the distortion distortion shown by FIG. 5 (b) and the bending deformation shown by FIG. 5 (c) mutually combined.

FIG. 5: (b) is sectional drawing which shows the distortion deformation a of the outer shell 5 when a load is applied toward the center from the outer peripheral point a of the outer shell 5 toward the center (direction of a white arrow). The outline shown by a solid line is a shape when a load is applied, and the outline shown by a dashed-dotted line is a shape when a load is not applied. The outer shell 5 is deformed as if the point a to which the load is applied is distorted and the area around the point a is expanded by the distorted portion.

Therefore, the forming roll 4b and the forming roll 4a do not contact at one point, but the forming roll 4a comes in contact with the curved surface by the amount of the distortion deformation a. In addition, the width | variety which the forming roll 4b and the forming roll 4a contact is called the nip width 18 (FIG. 5 (a)).

In FIG.5 (c), the bending deformation e of the shaping | molding roll 4a at the time of applying the load uniformly over the whole sheet contact part 2p of the outer shell 5 is shown. In FIG.5 (d), the bending deformation e is shown along the axial direction of the shaping | molding roll 4a. As shown in FIG.5 (d), the outer shell 5 produces the bending amount e by the largest bending deformation e in the center of an axial direction. Therefore, the cross-sectional view of the shaping roll 4a at the position where the bending deformation e becomes the maximum is the center 6c of the inner shell 6, as shown in Fig. 5 (c) when the distortion deformation a is not taken into account. The center 5c of the outer shell 5 moves with respect to the deflection amount e.

In the present embodiment, since the outer shell has a thickness of 5 mm, most of the deformation is distorted deformation a. In 1st Embodiment, the distortion distortion a and the bending deformation e in the center part of the axial direction of the outer shell 5 are about 0.14 mm and 0.06 mm, respectively, and the distortion distortion a ratio of the outer shell 5 occupies 70%.

Since the outer shell 5 of the forming roll 4a is largely bent at the central portion of the forming roll in the axial direction, the forming roll 4b serving as the mating side of the forming roll 4a can be regarded as a rigid roll, so that warpage can be ignored and not deformed. . For this reason, in order to match a curvature of the shaping | molding roll 4a and the shaping | molding roll 4b, and to form a nip, the nip part of the shaping | molding roll 4a at the time of a load load is made into a straight line. Therefore, the nip pressure can be made uniform over the axial direction by calculating the warpage amount by the planned load and giving the outer shell 5 a crown corresponding to the warpage amount.

In the first embodiment, the crown amount is formed by increasing the center radius of the forming roll by 0.2 mm. That is, the crown amount in diameter is 0.4 mm. By providing a crown, when the linear pressure prescribed | regulated at the time of shaping | molding of the sheet | seat 2 is applied, the uniform linear pressure is obtained in the width direction of the shaping | molding roll 4a. In addition, since the shaping | molding roll 4b is a rigid roll with a thick cell thickness and can deflect curvature, it does not provide a crown.

Next, the relationship between the longitudinal direction of the linear recessed part 12 and the mechanical strength of the outer shell 5 is demonstrated.

6A and 6B are views for explaining the relationship between the longitudinal direction in which the linear recesses 20 formed in the thin plate 19 extend and the ease of bending of the thin plate 19. As shown in FIG. 6A, by applying a force in a direction orthogonal to the longitudinal direction of the concave portion 20, the thin plate 19 is folded and bent along a direction parallel to the longitudinal direction of the concave portion 20. (When bending in the direction of the white arrow along the cross-section B in FIG. 6A), the sheet can be bent with a smaller force than the thin plate on which the linear recesses 20 are not formed. . This is because in the concave portion 20 located perpendicular to the direction in which the force is applied, the plate thickness is thin and the cross-sectional coefficient is small.

In contrast, as shown in FIG. 6B, a thin plate 19 is applied along the direction crossing the longitudinal direction of the concave portion 20 by applying a force in a direction parallel to the longitudinal direction of the linear concave portion 20. ) Is folded and folded (when bending in the direction of the white arrow along the cross-section A in FIG. 6B), it is almost the same as folding and bending a thin plate on which the concave portion 20 is not formed. I need the same power. This is because the cross-sectional coefficient in the direction in which the force is applied is almost the same as the cross-sectional coefficient of the thin plate on which the concave portion 20 is not formed.

Since the recessed part 12 shown in FIG. 3 is formed in the inner peripheral surface of the outer shell 5 substantially along the circumferential direction, it is a state near the structure shown to FIG. 6 (b). Therefore, the outer shell has the same rigidity as when the recess is not formed.

In terms of heat transfer, the portion in which the concave portion is formed has a small thickness of the outer shell, so that heat is easily transferred from the inner circumferential surface of the outer shell to the outer circumferential surface, thereby increasing the temperature control capability.

Moreover, since the surface area of the inner peripheral surface of the outer shell 5 is large because the outer shell 5 has the recessed part 12, the warming ability by the warming liquid 7 is high.

In other words, in the first embodiment, the thinning of the outer shell 5 at the point where the concave portion 12 is formed while maintaining the rigidity of the outer shell 5, and the outer shell 5 and the bath liquid 7 described above. The temperature of the bath is increased due to the increase in the contact area and the vortex effect of the bath 7 generated by the recess 12.

Next, the nip pressure performance with respect to the longitudinal stripe of the sheet | seat which arises easily in the sheet thickness nonuniformity, especially a thin sheet at the time of sheet shaping | molding is described.

In FIG. 7, since the recessed part 12 is formed in the shape near the ring which rounds the inner periphery of the outer shell 5, the outer shell 5 can be deformed flexibly along the axial direction. In FIG.7 (a) and FIG.7 (b), the sheet | seat 2 was cut | disconnected in the surface perpendicular | vertical with respect to the sheet | seat 2 when the sheet | seat 2 is pinched | interposed between the shaping roll 4a and the shaping roll 4b. The cross section of the time is shown. The outer cell 5 in which the recessed part 12 was formed is shown in FIG.7 (a), and the outer cell which has uniform thickness is shown in FIG.7 (b).

As shown in FIG. 7B, when the recess portion 12 is not formed, the outer shell 5 is integrally deformed, and thus the uncompressed portion 24 is in the vicinity of a large amount of inflow of molten resin. (Vertical streaks on the sheet) is easily generated. Since the uncompressed part 24 is not compressed by the outer circumferential surface of the outer shell 5, the uncompressed part 24 differs in appearance from the uncompressed part 24 and the crimped part. As a result, the sheet 2 exhibits a stripe-shaped appearance and becomes defective. .

In particular, when forming a thin film as the sheet 2, it is difficult to uniformly discharge molten resin from the T die 3 over the axial direction, and because the sheet 2 is thin, cooling is fast and the forming rolls 4A and Even if it crimped | bonded by 4B), the flow of molten resin in an axial direction is small, and the uncompressed part 24 tends to generate | occur | produce in the sheet | seat 2. By forming the recessed portion 12 in the outer shell 5, as shown in FIG. 7A, the outer shell 5 is easily deformed with respect to the direction orthogonal to the longitudinal direction of the recessed portion 12. (24) can be eliminated. Moreover, according to the outer shell 5 which has the recessed part 12, the thinner sheet 2 can be shape | molded at high speed.

In addition, in this embodiment, since the recessed part 12 is formed in ring shape around the axis | shaft of the outer shell 5, even if it is the structure which the outer shell 5 has the recessed part 12, distortion distortion a is small. For this reason, it is not necessary to also enlarge a crown amount, and the shaping | molding roll with favorable moldability with respect to the vertical stripe of a sheet | seat is obtained.

[Comparison by bending curve]

In FIG. 8, the curvature curve is shown with respect to the moldability with respect to the vertical stripe of the sheet | seat at the time of sheet chewing of the shaping | molding roll 4a of this embodiment compared with the conventional shaping roll in which the recessed part is not formed. In FIG. 8, a vertical axis | shaft shows a curvature amount and a horizontal axis | shaft shows the axial direction length (roll width) of a shaping | molding roll. A curvature curve is a curve which applied the nip linear pressure to the surface of a shaping | molding roll, and plotted the curvature amount of the shaping roll surface of a crown formation part along the width direction of a shaping | molding roll. The formability (flexibility with respect to the vertical stripe load) with respect to the vertical stripe of the sheet is basically compared with the amount of warpage in the width direction under the same forming roll, that is, the same linear pressure load condition.

As shown in FIG. 9, the bending curve shown in FIG. 8 was compared with the following three types of roll shape.

As shown to Fig.9 (a), the outer shell of the shape (1) of the comparative example did not have a recessed part, and the thickness was formed thick to the same extent as this embodiment. In the outer shell 5 of the shape 3 mentioned later, it corresponds to the shape without the recessed part 12. FIG. In FIG. 8, the bending curve of the shape (1) of a comparative example is shown by the dashed-dotted line.

As shown in FIG.9 (b), the outer shell of the shape (2) of a comparative example did not have a recessed part, and formed thickness thinner than this embodiment. It corresponds to the shaping | molding roll of patent document 1 mentioned above. In FIG. 8, the bending curve of the shape (2) of a comparative example is shown with a broken line.

As shown to Fig.9 (c), the outer shell 5 of the shape 3 of this embodiment had the recessed part 12, and formed thickness thicker than the shape (2). 8, the bending curve of the shape (3) of a comparative example is shown by the solid line. The curvature amount of the shape (3) of this embodiment is substantially the same as the curvature amount of the shape (2) of a comparative example.

The shape (2) of the comparative example and the shape (3) of the present embodiment correspond to almost the same crown amounts. Shape (1) is shown as a reference example of the amount of warpage.

[Line pressure load condition]

The linear pressure load of width 10mm x length 1300mmx100N / cm was loaded to the shaping | molding roll of 1st Embodiment. However, assuming the occurrence of vertical streaks in the sheet, the partial load is dispersed at four points in the range of 320 mm in the center of the forming roll to load the concave / convex load, and the bending flexibility of the forming roll is confirmed. It was.

That is, the convex load assumed the part with a sheet, and the concave load assumed the part without a sheet, and reproduced the vertical stripe of the sheet.

In the range of 320 mm of length in the center part of a shaping | molding roll, the linear pressure load of width 10mm x length 40mm * 200N / cm was equally distributed by 4 sets and pitch 80mm as a partial equal distribution load, and it loaded. The average nip pressure in the range of 320 mm in length in this center part is equal to 100 N / cm.

[Calculation Result of Warp Amount]

As the calculation method, the deflection amount was calculated with an electronic calculator using a general finite element method.

The calculation result of the curvature amount is shown in FIG.

As shown in FIG. 8, three bending curves are shown, and as shown in the part shown by the arrow E, the curve curved up and down by the load loaded in the center part is large, and the followability with respect to a partial load, and an outer shell It shows that the deformation | transformation ability of is excellent.

The shape (1) of the comparative example has a thickness of the outer shell of 4.6 mm, and since there is no concave portion, the warpage amount is about 1/2 of the shape (3) of the embodiment, and the change of the warpage amount at the partially loaded part. Ie less flexibility against longitudinal stripe loads.

The shape (2) of the comparative example has a thickness of the outer shell of 3.5 mm, and since there is no concave portion, the warpage amount is the same as that of the shape (3) of the embodiment, and the change of the warpage amount at the partially loaded part, namely Great flexibility against longitudinal stripe loads.

The shape 3 of the embodiment has a thickness of the outer shell of 4.6 mm, but since the outer shell has a concave portion, although the total amount of warpage is the same as that of the shape 2 of the comparative example, the change in the amount of warpage in the partial load portion, that is, the longitudinal direction The flexibility with respect to the stripe load is large compared with the shape (2) of the comparative example, and the flexibility with respect to the longitudinal stripe load is large. In other words, even if it is the shaping | molding roll of the same crown amount, the shaping | molding roll of the shape (3) of embodiment shows that it is excellent in flexibility with respect to a longitudinal stripe load compared with the shape (2).

Evaluation of this flexibility basically compares the amount of crowns, ie, the amount of warpage in the width direction of the sheet under the same linear pressure load conditions, to the same forming roll.

[Other comparisons]

Moreover, since the outer roll 5, the inner shell 6, the flange 10, and the shaft 9 are shape | molded by welding, the shaping | molding roll 4a rotates the outer shell 5 and the inner shell 6 individually. It can be rotated at a high speed compared to the forming roll. According to the first embodiment, it can be used at a rotational speed of 100 m / min.

In the shaping | molding roll of patent documents 2 and 3 in which an outer shell and an inner shell rotate individually, it is necessary to raise the mechanical strength in the sliding part of an outer shell and an inner shell. In short, the mechanical strength in the sliding portion becomes the endurance load in this forming roll. In addition, liquid leakage is likely to occur in the seal portions of the outer shell and the inner shell which rotate individually. In the forming roll 4a in 1st Embodiment of this invention, since the outer shell 5 and the inner shell 6 are united and rotated, there is no sliding part. Therefore, the allowable strength of the material can be made the endurance load of linear pressure, and durability becomes high. In addition, durability is increased by using a metal with little use such as rubber or plastic.

In order to supply and discharge the warm bath liquid 7 to the forming roll of this embodiment, the rotary joint 16 can be used similarly to a general rigid roll, and there is no problem in the durability of the rotary joint 16.

(Second Embodiment)

Next, the structure of the shaping | molding roll 4a in 2nd Embodiment is demonstrated.

The detailed sectional drawing which expanded the part from the center part of the shaping | molding roll 4a in the 2nd Embodiment to the operation side in FIG. 10 is shown.

In the first embodiment, all of the recesses 12 are formed as continuous female screws. In the second embodiment, as shown in FIG. 10, the recesses 12 are adjacent to the ends of the recesses 12 most formed on the flange 10 side. In the position, a bypass groove 21 for bypassing the cutting blade is formed in a ring shape along the axis circumference of the outer shell 5. By forming the bypass groove 21, the recess 12 is easily processed.

When forming the recessed part 12, the cutting blade is moved toward the outer side from the radial inside of the outer shell 5 in the state which the outer shell 5 is rotated about an axis. Then, the recessed part 12 is processed by moving a cutting blade in the axial direction of the outer shell 5. As in the second embodiment, by forming the bypass groove 21, the cutting blade can be temporarily waited in the bypass groove 21, and the timing at which the cutting blade is moved in the axial direction of the outer shell 5. It becomes easier to control. In addition, the bypass groove 21 may be formed in the axial direction center of the outer shell 5.

When the length of the shaping | molding roll 4a is long, it becomes difficult to match the position of the cutting blade at the time of forming the recessed part 12. FIG. In that case, by forming the bypass groove 21 suitably, even if it is the long forming roll 4a of 2 m or more in length, the process of the recessed part 12 will become easy. In 2 m or more elongate forming rolls, the bypass groove 21 is formed in the edge part of the concave formation part 12p and the axial direction center part of the outer shell 5, for example, by each side of the outer shell 5 in the axial direction. It becomes possible to process with good precision. In addition, the width in the axial direction of the bypass groove 21 is made as small as possible, thereby preventing a decrease in the mechanical strength of the entire outer shell 5, thereby preventing occurrence of nonuniformity in the rigidity and elasticity of the outer shell 5. .

Moreover, the recessed part formation width 12p is formed slightly larger than or the same as the sheet contact part (sheet width) 2p. The crown formation part 15 is formed larger than the recessed part formation width 12p. In 2nd Embodiment, the whole sheet width | variety 2p is in contact with the outer shell 5 of the structure similar to 1st Embodiment, and the uniformity, such as heat transfer and nip pressure conditions, is aimed at. Moreover, in 2nd Embodiment, when processing the recessed part 12 in the raw material of the outer shell 5, it becomes possible to process by matching the rotational position of the outer shell 5 and the timing of a blade conveyance.

In 2nd Embodiment, the axial length (length of a long surface) of the outer shell 5 was formed in 2000 mm. By using the outer shell 5 of such a length, the shaping | molding roll of 2 m or more in length of a long surface can be manufactured.

(Third Embodiment)

FIG. 11A shows a partial cross-sectional view of the outer shell 5 cut in the plane parallel to the axial direction in the third embodiment. In the first and second embodiments, the cross-sectional shape of the concave portion 12 is formed in a trapezoidal shape. In the third embodiment, the cross-sectional shape of the concave portion 12 is a shape having a U-shaped inner surface, so-called U. Formed into a shape. By forming it in a U shape, since the corner parts in the recessed part 12 are formed circularly in circular arc shape, stress concentration becomes small and the durability of the recessed part 12 can be improved. In addition, the cross-sectional shape of the recessed part 12 is not limited and there is no restriction | limiting in particular. However, the cross-sectional shape in which the notch of a valley part becomes large like the so-called V groove | channel which has a V-shaped inner surface needs to be careful because a crack may generate and it may be damaged.

(Fourth Embodiment)

FIG. 11B shows a partial cross-sectional view of the outer shell 5 cut in the plane parallel to the axial direction in the fourth embodiment. In 4th Embodiment, the cross-sectional shape of the recessed part 12 is formed in the rectangle near to rectangle. The square recessed part 12 is comprised so that each corner part may be formed in circular arc shape, and the notch | coupling coefficient of each corner part will not become large.

In addition, since the maximum stress at the nip load of the outer shell 5 is generated on the inner circumferential surface of the outer shell 5 and the area of the remaining ribs (convex portions) of the inner surface of the square recess 12 is large, the outer shell 5 ), The stress of the outer shell 5 is increased, the safety factor of the outer shell 5 is increased, and the life of the forming roll is long.

Although the action in 4th Embodiment is the same as that of 1st Embodiment, since the cross-sectional shape of the recessed part 12 is a rectangular shape near a rectangle, processing becomes simple.

In the square recessed part 12 which the outer shell 5 in 4th Embodiment has, the depth of the recessed part 12 and the range of the pitch P of the recessed part 12 are demonstrated.

[Action]

The operation | movement regarding the depth of the recessed part 12 is demonstrated with reference to FIG.12 (a)-FIG.12 (c).

The depth D of the recessed portion 12 of the outer shell 5 of the forming roll of the present embodiment is formed at 0.1 times or more the radial thickness t of the outer shell 5.

The modified example which changed the depth t1 of the recessed part 12 as an example is shown to FIG. 12A-FIG. 12C as an example, respectively.

In the forming roll of this embodiment, the main purpose is to ensure the flexibility of the forming roll by the recessed part 12 formed in the inner peripheral surface of the outer shell 5. Furthermore, the shaping | molding roll of this embodiment also aims at the uniformity of the heat transfer with respect to the sheet | seat 2, and aims at the improvement of heat transfer ability.

In the use of a forming roll, especially a touch roll, the linear pressure of the sheet is about 10 to 100 N / cm in the case of a light load roll and about 100 to 500 N / cm in the case of a heavy load roll. The radial thickness t1 of the outer shell 5 is changed depending on various combinations of the diameter of the forming roll, the length in the axial direction, and the linear pressure, but is formed within a range of about 2 mm to 20 mm.

As a depth of the recessed part 12, the structural example formed by dimension D1, D2, D3 is mentioned, for example as shown to FIG.12 (a)-FIG.12 (c).

[Deep recesses]

As shown to Fig.12 (a), the recessed part 12 formed comparatively deep at depth D1 is a shaping | molding roll for comparatively thin sheets. As an example, in the shaping | molding roll of the ultra-thin sheet whose thickness is about 50 micrometers, in order to fully acquire the flexibility of the outer shell 5, the thickness t1 of the outer shell 5 is formed by 4 mm and the depth td of the recessed part 12 about 3 mm. do.

In this configuration example, the depth td (= D1) of the recess 12 is 0.75 times the thickness t1 of the outer shell 5, but the depth td of the recess 12 is 0.9 of the thickness t1 of the outer shell 5. The upper limit of the depth td of the recess 12 may not be particularly limited.

According to this deep recessed part 12, since the shape of the circumferential surface of a shaping | molding roll can be maintained circularly, and the outer shell 5 can be processed thinly, for example, a large shaping | molding roll whose length is 2 m or more is manufactured. There is an effect that becomes possible.

[Shallow concave]

As shown to FIG. 12 (b) and FIG. 12 (c), the range of the effective depth as the recessed part 12 formed relatively shallowly is demonstrated.

As shown in FIG. 12 (b) and FIG. 12 (c), in the recessed portion 12 relatively shallow at the depth D2, the structure of the outer shell 5 is an example of sufficiently obtaining the flexibility of the outer shell 5. The thickness t1 is 5 mm, the depth td (= D2) of the recessed part 12 is 1 mm, the depth td of the recessed part 12 is 0.2 times the thickness t1 of the outer shell 5, and the axial direction of the outer shell 5 is present. The width | variety of the recessed part 12 with respect to was made into 1/2 of the pitch P of the recessed part 12. FIG. In the case of this structure, with respect to the value of the cross-section secondary moment I of the outer shell 5, with or without the recessed part 12, the cross section parallel to the longitudinal direction of the recessed part 12, and the length of the recessed part 12 Compare with the cross section orthogonal to the direction (cross section in the width direction).

As a result of the comparison, when the recess 12 is provided, the value I of the cross-sectional secondary moment in the cross section parallel to the longitudinal direction of the recess 12 is reduced to 52%, and is perpendicular to the longitudinal direction of the recess 12. The value I of the cross-sectional secondary moment in the cross section to be reduced to 78%, and the reduction effect when folded and bent along the longitudinal direction of the recess 12 is large. As a result, flexibility can be provided to the outer shell 5 having the recesses 12. Moreover, in the cross section parallel to the longitudinal direction of the recessed part 12, the part in which the recessed part 12 is not formed also exists, but the effect which the value I of the cross-sectional secondary moment by the recessed part 12 reduces is It is large and can judge by the value I of the cross-sectional secondary moment by the recessed part 12 which remains as the outer shell 5 whole.

Therefore, even in the recessed part 12 of depth 1mm which is 0.2 times the thickness t1 of the outer shell 5, the effect which gives flexibility to the outer cell 5 is acquired, and as a depth of the recessed part 12, there is a margin and the outer shell Even 0.1 times the thickness t1 of (5) has the effect of obtaining flexibility.

In the concave portion having a depth of 0.5 mm, which is 0.1 times the thickness t1 of the outer shell 5, the value I of the cross-sectional secondary moment in the cross section parallel to the longitudinal direction of the concave portion 12 is calculated in the same manner as described above. Decreases to 73% and the value I of the cross-sectional secondary moment in the cross section orthogonal to the longitudinal direction of the recessed portion decreases to 89%, and is folded and bent along the direction parallel to the recessed portion 12. The reduction effect is large. That is, even if it is a recessed part which is 0.1 times the thickness t1 of the outer shell 5, the effect which gives a softness to the outer shell 5 is acquired.

Moreover, in the recessed part 12 of the outer shell 5, the effect which heat transfer performance improves by increasing the contact area with the warm bath liquid 7 is a recessed part 12 as shown in FIG.12 (c). Even if the depth of the groove is shallow, the contact area with the bath liquid increases by decreasing the pitch P of the recess 12, and thus the depth of the recess 12 is irrelevant. However, since the main purpose of the present invention is to selectively improve the flexibility of the outer shell 5 in the axial direction, the flexibility of the outer shell 5 is first secured.

Moreover, about the depth of the recessed part 12, although the shaping | molding roll of the ultra-thin sheet about 50 micrometers thick was mentioned as an example, the high load is loaded with a nip pressure of about 300 N / cm with respect to the thin sheet about 0.1 mm thick. Even if it is a heavy load roll, this embodiment can be applied similarly and it is effective in providing flexibility. Therefore, the depth of the recessed part 12 in this invention should just be 0.1 times or more of the thickness t1 of the outer shell 5.

[Action]

The effect | action regarding pitch P of the recessed part 12 is demonstrated.

The outer shell 5 of the forming roll of the present embodiment has a pitch of the recesses 12 (the pitch between the recesses 12 adjacent to each other) of the outer shell 5 in the bottom surface of the recesses 12. It is 10 times or less of the minimum thickness tt of the radial direction.

Various modified examples of the pitch P of the recessed part 12 are shown using an example of a rectangular recessed part in FIGS. 13A-13C.

As mentioned above, the shaping | molding roll of this embodiment aims at ensuring the flexibility of a shaping | molding roll by the recessed part 12 formed in the inner peripheral surface of the outer shell 5. Furthermore, the shaping | molding roll of this embodiment also aims at the uniformity of the heat transfer with respect to the sheet | seat 2, and aims at the improvement of heat transfer ability.

As explained in the description of the depth of the recessed part 12, in the use of a touch roll, especially as a forming roll, the linear pressure of the sheet 2 is about 10-500 N / cm, and the radial thickness t1 of the outer shell 5 It is about 2 mm-8 mm. As pitch P of the recessed part 12, the structural example of P1, P2, P3 is mentioned.

[Speach]

As shown to Fig.13 (a), by making pitch P small like the recessed part of pitch P1, the flexibility and heat transfer property of a shaping | molding roll can be made more uniform with respect to the axial direction of a shaping | molding roll. However, by making the pitch P of the recess 12 small, the processing time of the recess 12 becomes long, resulting in an increase in manufacturing cost.

In the first embodiment described above, the minimum thickness tt of the outer shell 5 is 3.1 mm, the thickness t1 of the outer shell 5 is 5 mm, the pitch P is 4 mm, and the thickness t1 of the pitch P / outer shell 5 is shown. ) Ratio is 0.80, which is relatively small pitch. In addition, the ratio of (minimum thickness tt of pitch P / outer cell 5) is 1.29.

[Large pitch]

As shown in FIG. 13 (b) and FIG. 13 (c), by making pitch P large, processing of the recessed part 12 can be performed easily, but it is flexible and heat-transfer characteristic with respect to the axial direction of a shaping | molding roll. Unevenness may occur. The recessed portions 12 of the pitches P2 and P3 shown in Figs. 13B and 13C are relatively large pitches (a ratio of the thickness t1 of the pitch P / outer cell 5) to about 1.3. In addition, the ratio of (minimum thickness tt of pitch P / outer cell 5) is 3.2.

In the design of the forming roll of the present situation, even if the minimum thickness tt of the outer shell 5 is 1.0 mm, the thickness t1 of the outer shell 5 is 8 mm, and the pitch P is about 10 mm, it is fully realizable. In this configuration, the ratio of the thickness t1 of the pitch P / outer cell 5 is relatively large at about 1.25. In addition, the ratio of (minimum thickness tt of pitch P / outer cell 5) is 10. In this configuration, as an index for setting the pitch P, it is convenient to use a ratio of (pitch P / minimum thickness tt of the foreign cells) that affects the occurrence of thermal nonuniformity.

Therefore, the range of the pitch P of the recessed part 12 in this invention should just be 10 times or less (the ratio of the minimum thickness tt of the pitch P / outer cell 5).

(Fifth Embodiment)

The shape of the recessed part 12 shown in FIG. 14 aims at preventing excessive cooling of a residual rib (convex part). This recessed part 12 is for obtaining the flexibility with respect to the axial direction of the outer shell 5, and when the cooling of the remaining rib of the inner peripheral surface of the outer shell 5 is excessive, it is excellent in heat transfer performance from the surface of the outer shell 5, Unevenness in the axial direction occurs. Therefore, in this embodiment, the heat transfer from the residual rib of the recessed part 12 is interrupted | blocked, and the nonuniformity of heat transfer performance is reduced. By reducing the thickness of the remaining ribs in the axial direction of the outer shell 5, the heat transfer cross-sectional area from the tip of the remaining ribs is reduced, and the remaining ribs are prevented from being excessively cooled.

For this reason, as shown in FIG. 14, the width Wb of the bottom surface of the recessed part 12 of this embodiment is formed larger than the width Wa of the front end of the remaining rib which is the width | variety between adjacent recessed parts 12. As shown in FIG. When processing this recessed part 12, the threaded cutting process of the recessed part 12 is performed by moving the cutting blade of cross-sectional L shape shown in FIG. 14 to the axial direction of the outer shell 5. It can process into the shape which becomes wide toward the bottom surface side (outer side of the radial direction of the outer shell 5) inside the recessed part 12. As shown in FIG.

(Sixth Embodiment)

The recessed part 12 may be comprised combining several shapes. 15, the cross section of the structural example of the recessed part 12 which the outer shell 5 in 6th Embodiment has is shown. As shown in FIG. 15, two types of square recesses 12a and trapezoidal recesses 12b are formed in a double screw structure so as to be alternately arranged, and a set of square recesses 12a and trapezoidal recesses ( 12b) consisted of recess lead PP with pitch P between adjacent recesses. These two types of rectangular recesses 12a and trapezoidal recesses 12b have different depths, widths in the axial direction, and shapes of the recesses 12, but a shape repeated in a double screw structure can be obtained. Similarly to the first and second embodiments, the flexibility of the outer shell 5 can be ensured.

In addition, the formation direction which extends the recessed part 12 may be an inclination direction with respect to the axial direction of the outer shell 5. That is, the recessed part 12 is formed in the female thread shape of a multi-threaded screw. By inclining the direction in which the concave portion 12 extends with respect to the axial direction, the groove portion and the acid portion are mixed in contact with the contact portion with the forming roll 4b so as to smoothly rotate the forming roll. This is the same principle that the helical gear rotates more smoothly than the spur gear.

By arranging this recessed part 12 with respect to an axis line, the rigidity of the outer shell 5 and the magnitude | size of a spring constant can be adjusted in the cross section direction orthogonal to an axis line, and the cross section direction parallel to an axis line, and shaping | molding Forming rolls of various characteristics can be obtained by improving the design freedom of the rolls. For example, a touch roll with a large nip width can be produced.

(Seventh Embodiment)

As illustrated in FIG. 16, the outer shell 5 may be configured to be fitted to the shaft 9 so that the outer shell 5 can be attached to or detached from the roll body.

By constructing the outer shell 5 so that the outer shell 5 can be attached to and detached from the roll main body, a plurality of kinds of linear pressure forming rolls can be configured, and only the outer shell 5 can be replaced when the surface of the outer shell 5 is damaged.

The outer shell 5 is inserted into the shaft 9 from the operating side of the outer shell 5 in the axial direction, and is fixed to the flange 10 with the fixing bolt 29. Seals 35, such as an O-ring, are arrange | positioned at the both end surface of the outer shell 5, and the leakage of the warm-bath liquid 7 is prevented by the seal 35. As shown in FIG. By preparing two types of outer shell 5 and exchanging the outer shell 5, the production cost of the forming roll can be reduced as compared with the case of manufacturing a plurality of forming rolls.

Moreover, since the outer diameter of the operation side of the outer shell 5 is the same as the outer diameter of the molded part of the sheet 2, the operator can check the presence or absence of a bank by visually seeing the roll bite of the nip. It is convenient because there is. Moreover, the outer diameter of the drive side (motor side) of the outer shell 5 is formed larger than the outer diameter of the operation side in order to fix the outer shell 5 to the flange 10.

In addition, the length of the operation side of the outer shell 5 can be produced by aligning the cross section in the longitudinal direction (axial direction) with the forming roll to be the counterpart. It is not necessary to form the operation side long, but only the part of the flange 10 is formed long because the driving side abuts against the forming roll to be the counterpart side.

In the 1st-6th embodiment mentioned above, although it was the structure which has a double tube roll, ie, the outer shell 5 and the inner shell 6, you may be comprised by the shaping | molding roll of the single tube structure which does not have the inner shell 6.

As shown in FIG. 16, the shaping | molding roll of 7th Embodiment does not have the inner shell 6, and has the shaft 9 which supports the cell 5 corresponding to the outer shell 5 in embodiment mentioned above. Configuration. Inside the forming roll, a guide wall 20 extending spirally along the circumference of the shaft 9 is formed on the peripheral surface of the shaft 9.

In addition, in the structure shown in FIG. 16, although the axis | shaft 9 is comprised as one axis | shaft which penetrates the cell 5 in an axial direction, you may be comprised by connecting several divided shaft part. In the case of this structure, the shaft part located in the center of a shaping | molding roll is a structure only the cell 5 is connected. This configuration is preferably applied to a forming roll having a relatively large diameter and a relatively short length in the axial direction.

Moreover, in this structure, the thickness of the cell 5 is comparatively thick, for example, it can apply to the shaping | molding roll in which the linear pressure of about 300-500 N / cm of linear pressure is comparatively large. In addition, this structure may be applied to a cast roll instead of a touch roll.

The cell 5 in 7th Embodiment made the diameter larger and thicker than the 1st-6th embodiment, and made the surface area larger, and increased the temperature of the warming ability. It is suitable for forming rolls requiring high speed and high cooling capability such as cast rolls for forming BOPP (Bi-oriented Polypropylene). When using the shaping | molding roll in 6th Embodiment, as thickness of the sheet | seat 2, 0.15 mm-0.8 mm and a shaping | molding speed can be up to 120 m / min.

(Eighth embodiment)

The heat cooling method of the shaping | molding roll of this embodiment is not limited to the heat-cooling system using the above-mentioned warm-bath liquid 7, The other heat-cooling system using electric induction, gas, and gas-liquid mixed fluid, and the inside of a shaping roll The heat-cooling system which encloses the heat pipe liquid as a bath fluid, and indirectly heat-exchanges through the heat pipe liquid may be sufficient.

[Gas temperature control method]

In the above-mentioned embodiment, although the warm bath liquid 7 which is a liquid was used, a gas may be used. Since the recessed part 12 which the outer shell 5 of embodiment mentioned above functions also as what is called a heat exchange fin, even if a gas is used, a warm-water capability is obtained. Moreover, when using gas as a warm water fluid, it is preferable to raise a flow velocity compared with the case of using a liquid.

[Two-step temperature control system]

Moreover, in embodiment mentioned above, although it comprised so that the temperature of a shaping | molding roll may be adjusted by direct-flowing a warm-water fluid, such as a liquid and a gas, in the space on the inner peripheral side of the outer shell 5, For example, the inner circumference of the outer shell 5 is mentioned. In the space on the side, the forming roll may be temperature-controlled by using a first temperature fluid and a second temperature fluid and indirectly exchanging heat between the first temperature fluid and the second temperature fluid.

17, sectional drawing of the structural example of the shaping | molding roll of 8th Embodiment is shown. As shown in FIG. 17, the shaping | molding roll of 7th Embodiment has the cylindrical partition cell 30 as a separate cell which the inside of the outer shell liquid 5 flows into the inside of the outer shell 5 as a 1st warm chamber fluid. Formed. In this embodiment, the heat pipe liquid 31 which is a gas-liquid mixed fluid is enclosed between the inner peripheral surface of the outer shell 5 and the outer peripheral surface of the partition cell 30 as a 2nd temperature fluid. The heat pipe liquid 31 is enclosed so as to fill, for example, about two thirds of the volume of the space between the outer shell 5 and the partition cell 30. Moreover, the spiral guide wall 20b is formed in the outer periphery of the shaft 9, and the heating liquid 7 which flows inside the partition cell 30 is stirred.

In addition, the outer shell is provided with plugs 32a and 32b communicating with the space between the outer shell 5 and the partition cell 30, and are configured to be able to inject, discharge and encapsulate the heat pipe liquid 31. Moreover, as needed, a pressure gauge may be arrange | positioned in the vicinity of plug 32a, 32b, and the presence or absence of the gas in a space can be controlled by detecting the pressure in the space in which the heat pipe liquid 31 was enclosed. .

In addition, the heat pipe liquid 31 is not shown in the space filled with the heat pipe liquid 31 in the configuration shown in FIG. ), A plurality of things having a pressure resistant structure may be arranged in a row, and the circumference thereof may be filled with the bath liquid 7. In the case of this configuration, if a liquid such as water, oil, or the like in which the gas-liquid change does not occur at the use temperature of the forming roll as the bath liquid 7 is selected, pressure control such as tubing can be carried out with a simple configuration.

According to the shaping | molding roll of this embodiment, similarly to embodiment mentioned above, while obtaining flexibility, the uniform temperature characteristic over the axial direction of the outer peripheral surface of the outer shell 5 using the uniform temperature performance of the heat pipe liquid 31 is carried out. Has the effect of obtaining.

 (Other Embodiments)

In 1st Embodiment, although the recessed part 12 extended helically like a set screw, the ring-shaped recessed part extended so that it may draw a circle may be formed in multiple numbers. In this case, a perfect axial symmetry structure is obtained about the axis of the forming roll 4a, and the variation in the mechanical strength of the outer shell 5 is reduced. In addition, by decreasing the depth of the concave portion at the point corresponding to the small concave portion 13 stepwise and changing the mechanical strength of the outer shell 5 stepwise, the stress at the boundary at which the concave portion starts to form can also be relaxed. .

In addition, in the above-mentioned embodiment, although it applied to the shaping | molding roll 4a which the sheet | seat 2 does not wind in the pair of shaping | molding roll shown in FIG. 1, it is to the shaping | molding roll 4b which the sheet | seat 2 winds up. May be applied. Moreover, although the example of the sheet thickness to shape | mold was mentioned and demonstrated in 1st-7th embodiment, it is not limited to the roll for shaping | molding for the thickness of the above-mentioned sheet | seat.

In addition, the forming roll of this embodiment may be applied to rolls other than the forming roll of a sheet | seat.

Since the shaping | molding roll of this embodiment is excellent in cooling and a heating capability, the roll which requires heating, preheating and cooling other than the roll for sheet | seat making use of this characteristic, for example, the dryer roll of a papermaking machine, the roll of a printing machine, etc. It is preferable to use in other industrial rolls.

1: forming device
2: sheet
4a, 4b, 4c: forming roll
5: foreign cell
6: nacel
7: hot water solution
8a, 8b, 8c, 8d, 8e: Euro
12:

Claims (16)

Cylindrical outer shell for press forming the sheet,
A cylindrical inner cell disposed inside the outer cell and having an outer diameter smaller than that of the outer cell;
A roll for forming a sheet, wherein the outer shell is warmed by a warming fluid that flows through a space between the outer shell and the inner shell.
On the inner surface of the outer shell, a female threaded or ring-shaped recess extending along the axis of the outer shell is formed,
The depth of the said recessed part is 0.1 times or more of the radial thickness of the said outer shell, The roll for sheet formations characterized by the above-mentioned. Cylindrical outer shell for press forming the sheet,
A cylindrical inner cell disposed inside the outer cell and having an outer diameter smaller than that of the outer cell;
A roll for forming a sheet, wherein the outer shell is warmed by a warming fluid that flows through a space between the outer shell and the inner shell.
On the inner circumferential surface of the outer shell, a female-threaded or ring-shaped recess extending along the axis of the outer shell is formed.
The pitch of the said recessed part is 10 times or less of the radial thickness of the said shell in the bottom face of the said recessed part, The roll for sheet | seat formation characterized by the above-mentioned. The method according to claim 1 or 2,
On the outer circumferential surface of the inner cell, a convex wall extending spirally around the axis of the inner cell is formed, and the convex wall constitutes a flow path through which the warm water flows.
A predetermined gap is formed between the tip of the convex wall and the inner circumferential surface of the outer shell,
The predetermined gap is a roll for sheet molding that is equal to or more than the amount of warpage generated in the roll for sheet molding at the time of molding. The method of claim 3, wherein
The convex wall is divided into a plurality of sheets along the axial circumferential direction of the inner shell and is arranged at intervals. A cylindrical cell for press forming the sheet,
A shaft supporting the cell,
A roll for forming a sheet, wherein the cell is warmed by a warming fluid flowing through a space between an inner circumferential surface of the cell and the axis,
On the inner circumferential surface of the cell, a female threaded or ring-shaped recess is formed which extends along the axis of the cell,
The depth of the said recessed part is 0.1 times or more of the radial thickness of the said outer shell, The roll for sheet formations characterized by the above-mentioned. A cylindrical cell for press forming the sheet,
A shaft supporting the cell,
A roll for forming a sheet, wherein the cell is warmed by a warming fluid flowing through a space between an inner circumferential surface of the cell and the axis,
On the inner circumferential surface of the cell, a female threaded or ring-shaped recess is formed which extends along the axis of the cell,
The pitch of the said recessed part is 10 times or less of the radial thickness of the said cell in the bottom face of the said recessed part, The roll for sheet | seat formation characterized by the above-mentioned. 7. The method according to any one of claims 1 to 6,
Roll for sheet | seat shaping | molding which a whole warm water fluid is gas. The method according to claim 5 or 6,
A separate cell disposed in a space between the cell and the shaft, the bath fluid flowing back therein;
And a gas-liquid mixed fluid is sealed in a space between the inner circumferential surface of the cell and the outer circumferential surface of the other cell. The method according to any one of claims 1 to 8,
The cross-sectional shape orthogonal to the longitudinal direction of the said recessed part is formed in the trapezoid shape in which the width orthogonal to the said longitudinal direction becomes small toward the bottom surface of the said recessed part. The method according to any one of claims 1 to 8,
The cross section shape orthogonal to the longitudinal direction of the said recessed part is a sheet-form roll which is formed in the shape which has a U-shaped inner surface, or square shape. 11. The method according to any one of claims 1 to 10,
The cross section shape orthogonal to the longitudinal direction of the said recessed part is the sheet | seat shaping | molding roll in which the width | variety of the bottom surface of the said recessed part is formed larger than the width | variety between the adjacent recessed parts in the direction orthogonal to the said longitudinal direction. 12. The method according to any one of claims 1 to 11,
The concave portion includes a plurality of concave portions that differ in at least one of a pitch, a shape, and a depth between adjacent concave portions. 13. The method according to any one of claims 1 to 12,
The concave portion is a roll for sheet molding in which plating is performed on an inner surface thereof. 14. The method according to any one of claims 1 to 13,
The said shell or said cell is a roll for sheet formation which has a crown. 15. The method according to any one of claims 1 to 14,
The said outer shell or said cell is a sheet | seat shaping | molding roll comprised so that attachment or detachment is possible with respect to the shaft which supports the said outer shell or the said cell. The sheet shaping | molding method which shape | molds a sheet | seat by sandwiching molten resin between the rolls for sheet forming in any one of Claims 1-15.

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