JP2015093478A - Scraper roll and scraper device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance productivity of a film by preventing a roll from being damaged by an attached material scratched from the roll and preventing the attached material from adversely affecting the film.SOLUTION: A scraper roll comprises: a plurality of blade tips 16 scraping an attached material attached to the peripheral surface of a roll 5 for cooling, formed in the axial direction of the outer peripheral part and formed at an interval in the circumferential direction of the outer peripheral part; and grooves 17 each having an arc shaped cross section and formed between adjacent blade tips 16 in the cross section of the blade tip 16. The blade tip 16 is formed to be curved in the circumferential direction of the outer peripheral part and is continuously formed in a curved shape from the tops of adjacent blade tips 16 to the inner surface of the groove 17.

Description

  The present invention relates to a scraper roll and a scraper device for scraping off deposits adhering to a roll provided in a film manufacturing apparatus.

  A general film manufacturing apparatus includes a T die for extruding a molten resin material forming a film, a cooling roll for cooling the resin material extruded from the T die, and a film cooled by the cooling roll. A plurality of transport rolls for transport.

  Also, this type of film manufacturing apparatus scrapes off deposits adhering to the peripheral surface of a transport roll or a cooling roll (hereinafter referred to as a roll) in order to properly form and smoothly transport the film. (See, for example, Patent Document 1).

  FIG. 6 shows a side view of a scraper device related to the present invention. As shown in FIG. 6, the scraper device 101 related to the present invention includes a plate-shaped scraper 111, a support mechanism 112 for supporting the scraper 111, a fixing mechanism 113 for fixing the position of the scraper 111, and a support mechanism. And an adjustment mechanism 114 for adjusting the position of 112.

  The scraper device 101 is generated around the roll 105 and the solution contained in the resin material forming the film by bringing the cutting edge of the scraper 111 into contact with the peripheral surface of the roll 105 rotating during film production. Liquid deposits including dust and the like are scraped from the peripheral surface of the roll 105 by the scraper 111.

JP 2008-279625 A

  By the way, in the scraper device related to the present invention described above, when scrapes are removed from the peripheral surface of the roll, foreign matter such as dust (hereinafter referred to as dust) is in contact with the scraper blade tip and the roll. Is caught on the surface, and there is a problem that the peripheral surface of the roll is damaged by dust. In addition, when dust is caught in the contact portion between the scraper and the roll, the deposit scraped off by the scraper may leak from between the scraper blade edge and the peripheral surface of the roll, and the deposit is a film. There was a risk of adverse effects.

  For this reason, it is necessary to periodically perform cleaning to remove dust from the contact portion between the scraper and the roll, and this periodic cleaning causes a decrease in film productivity. was there.

  In particular, in the battery separator manufacturing process, a mixture of a polyolefin resin composition and a solvent is formed into a sheet, so that a large amount of solvent adheres to the cooling roll in an oily state, and such deposits must be reliably removed. Is important for obtaining a stable cooling effect of the cooling roll.

  Further, the deposits scraped off by the scraper overflow from the both ends in the longitudinal direction of the scraper blade edge to the outside of the scraper and are discharged. At this time, some of the deposits discharged from both ends of the scraper blade edge may adhere to the film being conveyed by the roll, and the deposits may adversely affect the film.

  As a countermeasure, it is conceivable to install a discharge device for discharging the deposits from the scraper so that the deposits scraped off by the scraper do not adhere to the film. However, there are limitations on the space and structure for installing the discharge device around the roll provided in the film manufacturing apparatus, and it is difficult to install an appropriate discharge device.

  In addition, the adjustment of the scraping property of the scraper depends only on the contact state of the scraper blade edge with the peripheral surface of the roll, and is determined by the position where the scraper is fixed to the roll.

  In addition, it is difficult to bring the scraper into contact with the peripheral surface of the roll with a uniform pressing force over the longitudinal direction of the blade edge, and this adjustment operation of the fixed position of the scraper is in the sense of the operator. Rely on. For this reason, it is difficult to perform the adjustment work properly in a short time, and there is a problem that skill is required to perform the appropriate adjustment work.

  Therefore, the present invention solves the above-mentioned technical problems, prevents the roll from being damaged or the film from being adversely affected by the deposits scraped from the roll, and increases the productivity of the film. An object of the present invention is to provide a scraper roll and a scraper device that can be used.

In order to achieve the above-described object, the scraper roll according to the present invention is a scraper roll that is rotated while the outer peripheral portion is in contact with the peripheral surface of the rotating roll,
A cutting edge that scrapes off deposits adhering to the peripheral surface of the roll, and is formed along the axial direction of the outer peripheral portion, with a plurality of cutting edges formed at intervals in the circumferential direction of the outer peripheral portion, and a cross section of the cutting edge And a groove having a circular arc cross section formed between adjacent cutting edges. The cutting edge is curved and formed in the circumferential direction of the outer peripheral portion, and is continuously formed in a curved shape from the tip of each adjacent cutting edge to the inner surface of the groove.

  In the scraper roll according to the present invention configured as described above, the deposits scraped off while the plurality of blade edges rotate are smoothly guided from the blade edge into the groove as the scraper roll rotates, and are attached to the groove. Kimono is collected. Further, the scraper roll scrapes off the adhering matter while the plurality of cutting edges rotate with respect to the roll, so that dust contained in the adhering matter is prevented from being caught between the peripheral surface of the roll and the cutting edge. Thus, according to the scraper roll, the scraped material is collected from the blade tip into the groove without the blade tip being kept in contact with the peripheral surface of the roll. It is possible to prevent the deposits from leaking out between the two.

  The scraper device according to the present invention also includes a scraper roll according to the present invention, a core member that supports the scraper roll, a drive mechanism that rotates the core member, and both ends of the core member in the axial direction. A set of pressing mechanisms for pressing the scraper roll.

  ADVANTAGE OF THE INVENTION According to this invention, it can avoid between the roll and blade edge | tip where the dust contained in a deposit | attachment is pinched, and it can prevent that the surrounding surface of a roll is damaged by dust. In addition, since dust is prevented from being caught between the roll and the blade edge, the adhered material scraped off by the blade edge is prevented from leaking between the peripheral surface of the roll and the blade edge, and the adhered material has an adverse effect on the film. Can be prevented. In addition, according to the present invention, it is not necessary to perform periodic cleaning for removing dust, and the productivity of the film can be increased.

It is a schematic diagram which shows the principal part of the film manufacturing apparatus with which the scraper apparatus of embodiment was applied. It is a figure for demonstrating the scraper apparatus of embodiment. It is a side view which shows the scraper roll in embodiment. It is a side view which shows the shape of the blade edge | tip of the scraper roll in embodiment. It is sectional drawing which shows an example of the other core member in embodiment. It is a side view which shows the scraper apparatus relevant to this invention.

  Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

  In FIG. 1, the schematic diagram of the principal part of the film manufacturing apparatus with which the scraper apparatus of embodiment was applied is shown. In FIG. 1, (a) shows a schematic side view of the film production apparatus, and (b) shows a schematic plan view of the scraper apparatus of the embodiment. FIG. 2 is a diagram for explaining the scraper device of the embodiment. 2A and 2C are side views of the scraper device of the embodiment, and FIG. 2B is a front view of the scraper device of the embodiment.

  As shown in FIG. 1, the scraper device 1 of the embodiment is employed in a film manufacturing apparatus, and is a peripheral surface of a cooling roll 5 that conveys a molten resin material 3 extruded from a T die 4 while cooling it. It is arranged at a position adjacent to. As shown in FIG.1 and FIG.2, the scraper apparatus 1 scrapes off the liquid deposit | attachment adhering to the surrounding surface of the cooling roll 5 with conveyance of the resin material. As shown in FIG. 2, the cooling roll 5 is supported by a rotating shaft 5a supported by a set of bearing members 5a, and is rotated by a driving mechanism (not shown).

  In FIG. 3, the side view of the scraper roll in embodiment is shown. As shown in FIG.1 and FIG.3, the scraper apparatus 1 of embodiment is the scraper roll 11 which can be elastically deformed by rotating the outer peripheral part contact | abutting with respect to the surrounding surface of the roll 5 for cooling, and a scraper. A core tube 12 as a core member for supporting the roll 11, a drive motor 13 as a drive mechanism for rotating the scraper roll 11, and a set of pressing mechanisms for pressing the scraper roll 11 against the peripheral surface of the cooling roll 5. 14.

  In FIG. 4, the side view of the shape of the blade edge | tip of the scraper roll 11 in embodiment is shown. The scraper roll 11 is formed in a cylindrical shape by an elastic material such as rubber. As shown in FIGS. 3 and 4, the scraper roll 11 has a cutting edge 16 that scrapes off deposits adhering to the peripheral surface of the cooling roll 5, and the plurality of cutting edges 16 are arranged in the axial direction of the outer peripheral portion. Formed along the circumferential direction of the outer peripheral portion.

  As shown in FIG. 4, the cross-section of the cutting edge 16 has a groove 17 having an arcuate cross section formed between adjacent cutting edges 16. In the groove 17, a discharge hole 18 for discharging the deposits scraped in the groove 17 is formed so as to penetrate from the groove 17 to the inner peripheral portion of the scraper roll 11. A plurality of discharge holes 18 are provided in the groove 17 at intervals in the axial direction of the scraper roll 11.

  Further, the discharge hole 18 is inclined with respect to the radial direction of the scraper roll 11 at the center line extending toward the inner peripheral portion of the scraper roll 11. By forming the discharge holes 18 in this way, the deposits guided to the discharge holes 18 are guided to the inner peripheral side of the scraper roll 11 through the discharge holes 18 as the scraper roll 11 rotates.

  As shown in FIGS. 3 and 4, the cutting edge 16 is formed by being curved in the circumferential direction of the outer peripheral portion of the scraper roll 11, and each of the tips of the plurality of cutting edges 16 is located on the same circumference. It is formed as follows.

  The scraper roll 11 is continuously formed in a curved shape from each adjacent blade edge 16 to the inner surface of the groove 17. By having such a groove 17, the adhering matter is smoothly moved to the base end side of the cutting edge 16 while scraping off the adhering matter by the rotating blade edge 16, and attached to the groove 17 as the scraper roll 11 rotates. Kimono is collected.

  The core tube 12 is formed in a cylindrical shape from a metal material, and the scraper roll 11 is fixed to the outer peripheral portion. As shown in FIGS. 3 and 4, the core tube 12 has a discharge path 21 as a first discharge path for guiding deposits from the discharge hole 18 to the inner periphery of the core tube 12. One end of the discharge path 21 is formed in communication with the discharge hole 18 of the scraper roll 11. Further, the discharge path 21 is inclined with respect to the radial direction of the core tube 12 so that the center line extending toward the inner peripheral portion of the core tube 12 is aligned with the center line of the discharge hole 18. As a result, with the rotation of the core tube 12, the deposits guided to the discharge path 21 are guided to the inner peripheral side of the core tube 12 through the discharge path 21.

  The pressing mechanism 14 has a support rod 14a connected to the axial end of the core tube 12, and an air cylinder 14b that reciprocates the support rod 14a. The pressing mechanism 14 can easily adjust the pressure of the scraper roll 11 with respect to the cooling roll 5, and can be uniformly pressed over the axial direction of the scraper roll 11.

  As shown in FIG. 1, the drive motor 13 is connected to a shaft fixed to one end of the core tube 12. The drive motor 13 has a speed reducer, and is controlled by the speed reducer so that the scraper roll 11 has a predetermined rotational speed.

  Regarding the scraper device 1 configured as described above, an operation of scraping off the adhering matter attached to the peripheral surface of the cooling roll 5 by the scraper roll 11 will be described.

  First, the scraper roll 11 is rotated by the drive motor 13 at a predetermined rotational speed in the direction opposite to the rotation direction of the cooling roll 5, and a predetermined pressing mechanism 14 is applied to the peripheral surface of the cooling roll 5 with a predetermined amount. Pressed with pressing force. Note that the pressing force for pressing the scraper roll 11 against the cooling roll 5 can be varied as necessary.

  The deposits scraped off by the rotating blade edge 16 are guided from the blade edge 16 into the circular arc-shaped groove 17 and collected in the groove 17 as the scraper roll 11 rotates. Deposits containing dust collected in the grooves 17 pass through the discharge holes 18 as the scraper roll 11 rotates, and are guided to the inner peripheral surface of the core tube 12 through the discharge path 21 of the core tube 12.

  The pressing force and the rotational speed of the scraper roll 11 are appropriately set according to the amount of deposit and the viscosity. In a state where the cutting edge 16 of the scraper roll 11 is pressed against the cooling roll 5 with an appropriate pressing force, the contact portion between the cutting edge 16 and the cooling roll 5 is continuously pressed along the peripheral surface of the cooling roll 5. Adjusted to. As a result, the cutting edge 16 of the scraper roll 11 is configured to be able to remove deposits adhering on the peripheral surface of the cooling roll 5 continuously and efficiently along the peripheral surface of the cooling roll 5. .

  Although not shown, for example, the deposits guided to the inner peripheral surface of the core tube 12 may be discharged from the core tube 12 using a suction hose connected to a pump. In addition, the inner peripheral surface of the core tube 12 is formed on a conical inner surface that gradually approaches the radial center from one axial end of the core tube 12 toward the other end. It may be configured to flow and discharge the deposit toward the other end side.

  In the above-described embodiment, the core tube 12 is used as the core member. However, as shown in FIG. 5, a solid core member may be used. FIG. 5 shows a cross-sectional view of an example of another core member.

  As shown in FIG. 5, the core member 22 is formed so as to communicate with the discharge hole 18 of the scraper roll 11, and a first discharge path 26 that guides deposits from the discharge hole 18 to the inner peripheral portion of the core member 22; And a second discharge path 27 for guiding deposits from the first discharge path 26 to both ends of the core member 22 in the axial direction.

  One end of the first discharge path 26 is formed in communication with the discharge hole 18 of the scraper roll 11. Further, the first discharge path 26 is inclined with respect to the radial direction of the core member 22 so that the center line extending toward the inner peripheral portion of the core member 22 coincides with the center line of the discharge hole 18.

  The second discharge path 27 is formed across both ends of the core member 22 and gradually approaches the radial center of the core member 22 from one axial end to the other end of the core member 22. It is formed in a taper shape. Since the second discharge path 27 is formed in a tapered shape, the adhering material guided from the first discharge path 26 to the second discharge path 27 moves along the second discharge path 27 in the core member 22. Flowing from one end to the other, deposits are discharged from the second discharge path 27 to the outside.

  Further, when such a core member 22 is used, although not shown, a collection device having a tray for receiving the deposits discharged from the scraper roll 11 is disposed in the vicinity of the axial end of the core member 22. By doing so, it becomes possible to collect | recover, without making a deposit adhere to a film using a simple structure. The core member 22 may be applied with a suction mechanism such as the pump described above for sucking and discharging the deposits guided to the second discharge path 27.

  As described above, the scraper device 1 according to the embodiment includes the scraper roll 11 having the plurality of cutting edges 16 that scrape off the deposits while rotating with respect to the peripheral surface of the cooling roll 5 and the grooves 17 that collect the deposits. By this, it becomes possible to prevent dust from being caught between the peripheral surface of the cooling roll 5 and the cutting edge 16, and it is possible to prevent the peripheral surface of the cooling roll 5 from being damaged by dust.

  As a result, the scraper device 1 does not need to periodically perform cleaning for removing dust from the contact portion between the cooling roll 5 and the scraper roll 11, and can increase the productivity of the film.

  Further, the scraper device 1 is configured such that the deposits scraped from the cooling roll 5 pass through the discharge hole 19 of the core tube 12 through the discharge hole 18 from the groove 17 between the blade edge 16 and the blade edge 16, To be discharged. This makes it possible to prevent the deposits scraped off by the cutting edge 16 of the scraper roll 11 from adhering to the film being conveyed by the cooling roll 5, and the deposits can adversely affect the film. Can be prevented.

  Further, the scraper device 1 presses the scraper roll 11 by using a set of pressing mechanisms 14, so that adjustment work for the contact state between the scraper roll 11 and the cooling roll 5 is not required for skill. The cutting edge 16 of the scraper roll 11 can be uniformly pressed against the peripheral surface of the roll 5 with an appropriate pressing force over the longitudinal direction.

  In the embodiment described above, the rotation direction of the scraper roll 11 is set to be opposite to the rotation direction of the cooling roll 5, but the scraper roll 11 is the same as the rotation direction of the cooling roll 5 as necessary. May be rotated in the direction.

  In the scraper device 1 of the embodiment, the object to be scraped off by the scraper roll 11 is the cooling roll 5, but is not limited to the cooling roll, and may be applied to other rolls. Of course.

  In addition, the scraper apparatus which concerns on this invention is used suitably for the film manufacturing apparatus which manufactures the separator film which comprises a lithium ion secondary battery.

DESCRIPTION OF SYMBOLS 1 Scraper apparatus 5 Cooling roll 11 Scraper roll 12 Core pipe 16 Cutting edge 17 Groove 18 Ejection hole

Claims (6)

An elastically deformable scraper roll that is rotated by contacting an outer peripheral portion with a peripheral surface of a rotating roll,
A plurality of cutting edges which are formed along the axial direction of the outer peripheral portion and spaced apart in the circumferential direction of the outer peripheral portion, the scraping edge scraping off deposits adhering to the peripheral surface of the roll; ,
In the cross section of the cutting edge, having a cross-sectional arc-shaped groove formed between the adjacent cutting edges,
The scraper roll, which is formed by being curved in the circumferential direction of the outer peripheral portion and continuously formed in a curved shape from the tip of each adjacent blade edge to the inner surface of the groove.   The discharge hole for discharging the deposits scraped into the groove is formed in the groove so as to penetrate from the groove to an inner peripheral portion of the scraper roll. Scraper roll.   The scraper roll according to claim 2, wherein a center line of the discharge hole extends toward an inner peripheral portion of the scraper roll and is inclined with respect to a radial direction of the scraper roll. A scraper roll according to any one of claims 1 to 3,
A core member for supporting the scraper roll;
A drive mechanism for rotating the core member;
A scraper device comprising: a pair of pressing mechanisms that support both ends of the core member in the axial direction and press the scraper roll against the roll. The scraper roll has a discharge hole for discharging the deposit formed by penetrating from the groove to the inner periphery of the scraper roll and scraped into the groove,
5. The scraper device according to claim 4, wherein the core member has a first discharge path that communicates with the discharge hole and guides the deposit from the discharge hole to an inner peripheral portion of the core member.   The scraper device according to claim 5, wherein the core member has a second discharge path that guides the deposit from the first discharge path to both axial ends of the core member.

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