JP6747126B2 - Filter changer and film manufacturing equipment - Google Patents

Description

The present invention relates to a filter changer and a film manufacturing device.

A filter unit for filtering the resin is provided on the downstream side of the extruder (see Patent Documents 1 to 3). The filter section is equipped with a filter changer for replacing used filters. The filter changer is provided with a filter holder capable of mounting a plurality of filters. The operator switches the filter by sliding the filter holder.

JP, 2013-022962, A JP, 08-224734, A Japanese Patent Laid-Open No. 06-008306

The filter holder has a horizontal filter insertion port. Therefore, the filter cannot be lifted by using a hoist or the like, and the operator needs to manually pull out the heavy filter in the horizontal direction. In addition, the filter holder is cleaned when the filter is replaced, but it is difficult to clean it because it is not possible to fully see through the insertion hole.

SUMMARY OF THE INVENTION An object of the present invention is to provide a filter changer and a film manufacturing apparatus that facilitate filter replacement work.

A filter changer according to an aspect of the present invention includes a filter holder in which a plurality of filter units are mounted from vertically above, a slide space in which the filter holder slides, and a resin supply hole and a resin supply hole at a position facing the slide space. The housing includes a resin discharge hole, and a slide device that slides the filter holder along the slide space to switch the filter unit connected to the resin supply hole and the resin discharge hole.

According to this structure, the insertion port of the filter unit is provided vertically above. Therefore, the filter unit can be easily pulled out using a hoist or the like. Moreover, since the inside of the insertion port can be seen through, the filter holder can be easily cleaned. Therefore, the replacement work of the filter becomes easy.

For example, the filter unit includes a filter case having a resin inflow hole and a resin outflow hole, and a filter housed in the filter case and configured to filter the resin flowing from the resin inflow hole and discharge the resin to the resin outflow hole. Have.

According to this configuration, the resin does not directly adhere to the filter holder, so that the filter holder is less likely to get dirty. In addition, the filter-dirty filter can be replaced together with the filter case. Therefore, the replacement work of the filter becomes easy.

For example, in the housing, the resin supply pipe part provided with the resin supply hole, the resin discharge pipe part provided with the resin discharge hole, the resin supply pipe part or the resin discharge pipe part is provided in the filter unit. And a pressing member to be pressed.

According to this configuration, the filter unit and the resin supply pipe portion and the resin discharge pipe portion are in close contact with each other. Therefore, the sealing property between the filter unit and the resin supply pipe portion and the resin discharge pipe portion is improved. Therefore, leakage of resin is suppressed, and the filter unit and the filter holder are less likely to be contaminated with resin.

For example, the filter case has a body portion in which the filter is housed, a first end portion in which the resin inflow hole is provided, and a second end portion in which the resin outflow hole is provided. The outer diameters of the first end portion and the second end portion are smaller than the outer diameter of the body portion.

With this configuration, the contact area between the filter unit and the resin supply pipe portion and the resin discharge pipe portion is reduced. Therefore, the force applied by the pressing member per unit area becomes large. Therefore, the sealing property between the filter unit and the resin supply pipe portion and the resin discharge pipe portion is enhanced.

For example, there is a gap between the peripheral edge of the tip surface of the first end and the resin supply pipe, and the peripheral edge of the tip of the second end and the resin discharge pipe are There is a gap between them.

According to this configuration, the contact area between the filter unit and the resin supply pipe portion and the resin discharge pipe portion becomes small. Therefore, the force applied by the pressing member per unit area becomes large. Therefore, the sealing property between the filter unit and the resin supply pipe portion and the resin discharge pipe portion is enhanced. Further, when the filter holder is slid to move the filter unit, the possibility that the filter unit collides with the ends of the resin supply pipe portion and the resin discharge pipe portion is reduced.

For example, the filter holder has a first side wall facing the resin supply pipe part and a second side wall facing the resin discharge pipe part, and the first side wall is arranged from above in a vertical direction. A first slit has a first slit fitted therein, and the second side wall has a second slit in which the second end is fitted vertically upward.

According to this structure, the filter unit is positioned in the filter holder by the first slit and the second slit.

For example, the first slit, the second slit, the first end portion, and the second end portion each have a shape elongated in the vertical direction.

According to this configuration, the rotation of the filter unit is suppressed and the posture of the filter unit is stabilized.

For example, the housing is provided with a first heater.

With this configuration, the entire resin flow path from the resin inflow hole to the resin outflow hole is heated.

For example, the body part is provided with a second heater.

With this configuration, it is possible to heat the filter unit connected to the resin supply hole and the resin discharge hole, and the auxiliary filter unit that is not heated by the first heater.

For example, the filter holder has a plurality of holder parts to which the filter unit is attached, and an energizing part for energizing the second heater is provided for each of the holder parts.

According to this structure, it becomes easy to energize the second heater.

For example, the adjacent holder portions are partitioned by a partition member, and a gap is provided between the filter unit mounted on the holder portion and the partition member.

With this configuration, the heat of the second heater is less likely to be transferred to the adjacent filter unit.

A film manufacturing apparatus according to an aspect of the present invention includes an extruder, a filter unit that filters a resin supplied from the extruder, and a film forming unit that forms a film using the resin filtered by the filter unit. And the filter part has a filter changer according to an aspect of the present invention.

According to this configuration, a film manufacturing apparatus that facilitates filter replacement work is provided.

According to the present invention, it is possible to provide a filter changer and a film manufacturing apparatus in which filter replacement work is easy.

FIG. 1 is a schematic view of a filter changer according to the first embodiment. FIG. 2 is a cross-sectional view of the filter unit. FIG. 3 is a cross-sectional view of the filter changer orthogonal to the sliding direction. FIG. 4 is a cross-sectional view of the filter changer parallel to the sliding direction. FIG. 5 is a view of the filter changer viewed from the resin discharge pipe portion side. FIG. 6 is a diagram showing the replacement work of the filter unit. FIG. 7: is the figure which looked at the filter unit from the 1st slit side. FIG. 8: is sectional drawing of the filter changer of a comparative example parallel to a sliding direction. FIG. 9: is sectional drawing of the filter changer of a comparative example orthogonal to a sliding direction. FIG. 10 is a schematic diagram of a film manufacturing apparatus. FIG. 11 is a sectional view of a filter changer according to the second embodiment. FIG. 12 is a schematic view of a filter changer according to the third embodiment.

[First embodiment]
FIG. 1 is a schematic diagram of a filter changer 100 according to the first embodiment.

The filter changer 100 has a housing 10, a filter holder 20, and a slide device 30.

The filter holder 20 has a plurality of holder portions 20A on which the filter unit 50 is mounted. The plurality of holder portions 20A are arranged side by side in the horizontal direction. The insertion port of the filter unit 50 is provided vertically above. A plurality of filter units 50 are attached to the filter holder 20 from vertically above. The plurality of filter units 50 include a filter unit 50N introduced into the flow path of the resin R and a spare filter unit 50S. The used filter unit 50 is pulled out from the holder portion 20A in the vertical direction VT.

The housing 10 has a slide space SP in which the filter holder 20 slides. The housing 10 has a cylindrical shape surrounding the slide space SP. The housing 10 is provided with a resin supply hole 11a and a resin discharge hole 12a at positions facing the slide space SP. The filter unit 50 contacts the inner wall surface of the housing 10 in which the resin supply hole 11a and the resin discharge hole 12a are provided.

The resin supply hole 11a is connected to the resin inflow hole 56a of the filter unit 50. The resin discharge hole 12a is connected to the resin outflow hole 57a (see FIG. 2) of the filter unit 50. The resin R1 containing impurities flows into the resin supply hole 11a from the upstream side. The resin R1 is filtered by the filter unit 50. The resin R2 having impurities reduced by the filter unit 50 flows into the resin discharge hole 12a. A resin R flow path is formed by the resin supply hole 11a, the filter unit 50, and the resin discharge hole 12a.

The slide device 30 slides the filter holder 20 along the slide space SP to switch the filter unit 50 connected to the resin supply hole 11a and the resin discharge hole 12a. The slide device 30 slides the plurality of holder portions 20A in the slide direction SL. The slide direction SL is a direction parallel to the arrangement direction of the plurality of holder portions 20A. Only one holder portion 20A is accommodated in the slide space SP. The other holder portion 20A is arranged outside the slide space SP.

FIG. 2 is a sectional view of the filter unit 50.

The filter unit 50 has a filter 51 and a filter case 55. The filter 51 is, for example, a leaf filter having a leaf type filter element 52. A filter element 52 and a pressing disc 53 are attached to the center pole 51a.

The filter case 55 has a case body 56 and a lid 57. The case main body 56 is provided with a resin inflow hole 56a and a recess 56b. The lid 57 is provided with a resin outflow hole 57a. The resin inflow hole 56a and the resin outflow hole 57a communicate with the recess 56b.

The filter 51 is fitted in the recess 56b. The recess 56b is closed by a lid 57. The case body 56 and the lid 57 are fixed by bolts. A gap FP is provided between the recess 56b and the filter 51. The resin R1 flowing from the resin inflow hole 56a flows into the filter element 52 through the gap FP. The resin R2 filtered by the filter element 52 is discharged to the resin outflow hole 57a through the center pole 51a.

The filter case 55 has a body portion 50A in which the filter 51 is housed, a first end portion 50B provided with a resin inflow hole 56a, and a second end portion 50C provided with a resin outflow hole 57a. .. The outer diameters of the first end portion 50B and the second end portion 50C are smaller than the outer diameter of the body portion 50A. A tapered portion EA is provided on the peripheral edge of the first end 50B and the peripheral edge of the second end 50C. The tapered portion EA does not contact the housing 10. The central portion CA of the first end portion 50B and the central portion CA of the second end portion 50C contact the housing 10.

A second heater 59 is provided on the body portion 50A. The second heater 59 is provided on the entire outer peripheral surface of the body portion 50A. The second heater 59 heats the resin R flowing inside the body portion 50A.

FIG. 3 is a cross-sectional view of the filter changer 100 orthogonal to the sliding direction SL.

The housing 10 includes, for example, a resin supply block 11, a resin discharge block 12, a first plate part 13, a second plate part 14, a third plate part 42, and a fourth plate part 46. Have.

The first plate portion 13 covers the upper part of the slide space SP. The second plate portion 14 covers the lower part of the slide space SP. The third plate portion 42 and the fourth plate portion 46 are arranged to face each other in the flowing direction of the resin R with the slide space SP interposed therebetween. The first plate portion 13, the second plate portion 14, the third plate portion 42, and the fourth plate portion 46 are configured as separate members, for example, and are fixed to each other by bolts. However, the first plate part 13, the second plate part 14, the third plate part 42, and the fourth plate part 46 may be integrally configured by the same member.

The third plate portion 42 is provided with a through hole 42a that communicates with the slide space SP. The resin supply block 11 is fitted in the through hole 42a. The fourth plate portion 46 is provided with a through hole 46a that communicates with the slide space SP. The resin discharge block 12 is fitted in the through hole 46a. The resin supply block 11, the resin discharge block 12, the first plate part 13, the second plate part 14, the third plate part 42, and the fourth plate part 46 are arranged so as to surround the slide space SP. ..

The resin supply block 11 has, for example, a resin supply pipe portion 41, a first intermediate plate portion 43, and a bolt 44. The resin supply pipe portion 41 is provided with a resin supply hole 11a. The resin supply pipe part 41 has a main body part 41a and an inflow part 41b. The body portion 41a is fitted in the through hole 42a. The inflow portion 41b projects from the main body portion 41a to the side opposite to the slide space SP side. The resin supply hole 11a penetrates the main body portion 41a and the inflow portion 41b.

The first intermediate plate portion 43 is provided with a through hole 43a that allows the inflow portion 41b to pass therethrough. The first intermediate plate portion 43 is superposed on the third plate portion 42 and the main body portion 41a from the side opposite to the slide space SP side. The outer peripheral portion of the first intermediate plate portion 43 is fixed to the third plate portion 42 by bolts. A bolt 44 is attached to the inner peripheral portion of the first intermediate plate portion 43. The bolt 44 penetrates the first intermediate plate portion 43 and is in contact with the main body portion 41a. The body portion 41a is pressed against the filter unit 50 side by the bolt 44.

The resin discharge block 12 has, for example, a resin discharge pipe portion 45. The resin discharge pipe portion 45 is provided with a resin discharge hole 12a. The resin discharge pipe portion 45 has a main body portion 45a and an outflow portion 45b. The body portion 45a is fitted into the through hole 46a. A flange portion that overlaps the fourth plate portion 46 is provided on the main body portion 45a. The flange portion is fixed to the fourth plate portion 46 with a bolt. The outflow portion 45b projects from the main body portion 45a to the side opposite to the slide space SP side. The resin discharge hole 12a penetrates the main body portion 45a and the outflow portion 45b.

The bolt 44 functions as a pressing member that presses the resin supply pipe portion 41 against the filter unit 50. The filter unit 50 and the resin supply pipe portion 41 and the resin discharge pipe portion 45 strongly adhere to each other. Therefore, the sealing property between the filter unit 50 and the resin supply pipe portion 41 and the resin discharge pipe portion 45 is improved. Therefore, leakage of the resin R is suppressed, and the filter unit 50 and the filter holder 20 are less likely to be contaminated with the resin R.

Although four bolts 44 are shown in FIG. 1, the number of bolts 44 is not particularly limited. The number of bolts 44 can be appropriately adjusted in consideration of the sealing property and workability between the filter unit 50 and the resin supply pipe portion 41 and the resin discharge pipe portion 45.

From the viewpoint of improving wear resistance, the contact surface between the filter unit 50 and the resin supply pipe portion 41 and the resin discharge pipe portion 45 may be subjected to surface hardening treatment such as heat treatment or nitriding treatment, or diamond-like carbon. A layer having abrasion resistance such as a (DLC) layer may be formed. From the viewpoint of durability, it is preferable to perform surface hardening treatment by nitriding treatment on the contact surface.

As described above, the outer diameters of the first end portion 50B and the second end portion 50C are smaller than the outer diameter of the body portion 50A. A gap G1 exists between the resin supply pipe portion 41 and the peripheral portion of the front end surface of the first end portion 50B. A gap G2 exists between the resin discharge pipe portion 45 and the peripheral portion of the tip end surface of the second end portion 50C. The contact area between the filter unit 50 and the resin supply pipe portion 41 and the resin discharge pipe portion 45 is small. Therefore, the force per unit area applied by the bolt 44 is large. Therefore, the sealing property between the filter unit 50 and the resin supply pipe portion 41 and the resin discharge pipe portion 45 is further enhanced. Further, when the filter holder 20 is slid to move the filter unit 50, there is less risk of the filter unit 50 colliding with the ends of the resin supply pipe portion 41 and the resin discharge pipe portion 45.

The housing 10 is provided with, for example, a first heater 15. The first heater 15 is provided, for example, on the first plate portion 13, the second plate portion 14, the third plate portion 42, and the fourth plate portion 46. The first plate portion 13 is provided with a temperature sensor 65 that measures the temperature of the slide space SP. The energization amount of the first heater 15 is controlled based on the measurement result of the temperature sensor 65. The first heater 15 can heat the first end 50B and the second end 50C where the second heater 59 is not provided. The first heater 15 heats the entire flow path of the resin R from the resin inflow hole 56a to the resin outflow hole 57a.

FIG. 4 is a sectional view of the filter changer 100 parallel to the sliding direction SL. FIG. 5 is a view of the filter changer 100 viewed from the resin discharge block 12 side.

The filter holder 20 has, for example, a first side wall 21 facing the resin supply pipe part 41 and a second side wall 22 facing the resin discharge pipe part 45. The space between the first side wall 21 and the second side wall 22 is partitioned by, for example, a plurality of partition members 23 arranged in the sliding direction.

The space sandwiched between two adjacent partition members 23 is one holder portion 20A. The energization part 26 that energizes the second heater 59 is provided for each holder part 20A. The energization unit 26 is provided with, for example, a temperature sensor (not shown) that measures the temperature of the second heater 59. The energization amount of the second heater 59 is controlled based on the measurement result of this temperature sensor. A gap is provided between the filter unit 50 mounted on the holder portion 20A and the partition member 23. Therefore, it is difficult for the heat of the second heater 59 to be transferred to the adjacent filter unit 50.

The first side wall 21 has, for example, a first slit 21S into which the first end 50B is fitted from vertically above. The second side wall 22 has, for example, a second slit 22S into which the second end 50C is fitted from vertically above. The first slit 21S and the second slit 22S are provided for each holder 20A. The filter holder 20 slides along the slide space SP with the first end 50B and the second end 50C exposed to the outside.

The filter unit 50 is positioned on the filter holder 20 by the first slit 21S and the second slit 22S. The first slit 21S, the second slit 22S, the first end portion 50B and the second end portion 50C each have a shape elongated in the vertical direction. Therefore, the rotation of the filter unit 50 is suppressed, and the posture of the filter unit 50 is stabilized.

The slide device 30 includes, for example, a cylinder 31, a piston rod 32, a piston 33, and a plurality of guide bars 34. The cylinder 31 slides the piston rod 32 in the slide direction SL by hydraulic pressure, for example. The piston rod 32 is fixed to the partition member 23 arranged on the slide device 30 side via a piston 33. The piston 33 slides in the slide direction SL together with the piston rod 32 while being guided by the plurality of guide bars 34.

When the piston 33 moves to the housing 10 side, the filter unit 50 held by the holder portion 20A on the piston 33 side is introduced into the slide space SP. When the piston 33 comes into contact with the housing 10, the movement of the piston 33 is stopped. When the piston 33 stops, the resin inflow hole 56a and the resin outflow hole 57a of the filter unit 50 are arranged at positions facing the resin supply hole 11a and the resin discharge hole 12a of the housing 10, respectively.

By moving the piston 33 to the side opposite to the housing 10 side, the filter unit 50 held by the holder portion 20A on the side opposite to the piston 33 side is introduced into the slide space SP. When the stopper 29 provided at the tip of the filter holder 20 (the end opposite to the piston 33 side) comes into contact with the housing 10, the movement of the piston 33 is stopped. When the piston 33 stops, the resin inflow hole 56a and the resin outflow hole 57a of the filter unit 50 are arranged at positions facing the resin supply hole 11a and the resin discharge hole 12a of the housing 10, respectively.

FIG. 6 is a diagram showing the replacement work of the filter unit 50. The replacement operation of the filter unit 50 will be described below with reference to FIGS. 3 to 6.

The worker U loosens the bolt 44 to reduce the adhesion between the used filter unit 50N and the resin supply pipe portion 41. The operator U slides the filter holder 20 and moves the used filter holder 50N to the outside of the housing 10. A spare filter unit 50S is accommodated in the holder portion 20A adjacent to the holder portion 20A in which the filter unit 50N is accommodated. As the filter holder 20 slides, the spare filter unit 50S moves inside the housing 10.

When the piston 33 or the stopper 29 comes into contact with the housing 10 and the movement of the filter holder 20 is stopped, the worker U tightens the bolt 44 to bring the resin supply pipe portion 41 into close contact with the filter unit 50S. When the connection between the housing 10 and the filter unit 50S is completed, the first heater 15 is energized using the energizing portion 66 to heat the housing 10.

The used filter unit 50N is pulled out from the holder portion 20A using, for example, a hoist HT. The worker U attaches the ring screw 61 to the screw hole provided at the upper end of the filter unit 50N. The worker U hooks the hook 62 provided at the tip of the chain 63 on the ring screw 61. Then, the worker U pulls the chain 63 to lift the filter unit 50N vertically upward. Although FIG. 6 shows an example in which the worker U manually pulls the chain 63, the worker U may pull the chain 63 using a crane or the like. As a result, the filter unit 50N is pulled out vertically upward from the holder portion 20A.

An unused filter unit 50S is attached to the holder portion 20A from which the filter unit 50N has been pulled out. The work of mounting the unused filter unit 50S on the holder portion 20A is also performed using the hoist HT. The worker U suspends the unused filter unit 50S by the chain 63 and inserts it into the holder portion 20A from above vertically. Then, the ring screw 61 is removed from the filter unit 50S, and the body portion 50A of the filter unit 50S is heated by the second heater 59.

The second heater 59 always keeps heating the body portion 50A while the filter unit 50S is housed in the holder portion 20A. Even after the filter unit 50S moves into the housing 10, the power supply to the second heater 59 is not stopped. This makes it possible to heat the filter unit 50N connected to the resin supply hole 11a and the resin discharge hole 12a, and the auxiliary filter unit 50S that is not heated by the first heater 15.

FIG. 7 is a view of the filter unit 50 seen from the first slit 21S side.

The solid material DT of the resin R is attached to the central portion CA of the first side wall 21 and the first end portion 50B. The solid material DT is the resin R leaked from the resin inflow hole 56a for sliding the filter unit 50 and dried and cured. Compared to the amount of resin R that passes through the filter unit 50, the amount of resin R that adheres to the surface of the device as solid matter DT is very small. It is considered that the filter unit 50 and the resin supply pipe portion 41 were strongly adhered to each other and the leakage of the resin R was small. Although the solid matter DT needs to be wiped off, the amount of the solid matter DT attached is small, and thus the wiping operation is easy.

Hereinafter, the effect of the filter changer 100 of the present embodiment will be described in comparison with the filter changer 101 of the comparative example. The filter changer 101 of the comparative example is a commercially available filter changer. FIG. 8 is a cross-sectional view of a filter changer 101 of a comparative example parallel to the sliding direction SL. FIG. 9 is a cross-sectional view of a filter changer 101 of a comparative example orthogonal to the sliding direction SL.

The filter changer 101 has a housing 70, a filter holder 80, and a slide device 90. The filter holder 80 has a plurality of holder portions 80A whose insertion openings are horizontally opened. The filter 51 is not housed in the filter case 55 but is housed directly in the holder portion 80A.

A resin outflow hole 81 is provided in the holder portion 80A. The resin outflow hole 81 connects the center pole 51 a of the filter 51 and the resin discharge hole 72 of the housing 70. The cross-sectional shape of the filter holder 80 orthogonal to the sliding direction SL is circular.

The housing 70 has a cylindrical slide space. The cross-sectional shape of the housing 70 orthogonal to the sliding direction SL is square. A clearance for sliding the filter holder 80 is provided between the housing 70 and the filter holder 80. No means for adjusting the clearance is provided. The configuration of the slide device 90 is the same as that of the slide device 30 of this embodiment.

In the filter changer 101 of the comparative example described above, the insertion port of the filter 51 is provided in the horizontal direction. The used filter 51 is horizontally withdrawn from the holder 80A. With this configuration, the filter 51 cannot be lifted using a hoist or the like. Therefore, the operator needs to manually pull out the heavy filter 51 in the horizontal direction. Further, although the filter holder 80 is cleaned when the filter 51 is replaced, it is difficult to clean the inner part of the insertion port because it cannot be fully seen.

On the other hand, in the filter changer 100 of this embodiment, the insertion port of the filter unit 50 is provided vertically above. Therefore, the filter unit 50 can be easily pulled out using a hoist or the like. Further, the filter holder 20 can be easily cleaned because the inner side of the insertion port can be seen through. Therefore, the replacement work of the filter 51 becomes easy.

In the filter changer 101 of the comparative example, the resin R supplied from the resin supply hole 71 directly flows into the holder portion 80A. Since the resin R spreads over the entire holder portion 80A, a great amount of labor is required for cleaning the holder portion 80A. Since the resin R leaks out along the clearance between the housing 70 and the filter holder 80, it is necessary to clean the inner wall surface of the housing 70 and the outer peripheral surface of the filter holder 80. Since a large amount of resin R is attached to the filter 51, it is necessary to handle the filter 51 with care.

On the other hand, in the filter changer 100 of this embodiment, the resin R1 supplied from the resin supply hole 11a flows into the resin inflow hole 56a of the filter unit 50. The resin R1 does not flow directly into the holder portion 20A. Therefore, the holder portion 20A is kept clean.

Further, the clearance between the housing 10 and the filter holder 20 is adjusted by the bolt 44. Therefore, the resin R does not easily leak out along the clearance between the housing 10 and the filter holder 20. Therefore, it is easy to clean the inner wall surface of the housing 10 and the outer peripheral surface of the filter holder 20.

Further, since the resin R does not directly adhere to the filter holder 20, the filter holder 20 is less likely to get dirty. The filter 51 soiled with the resin R can be replaced together with the filter case 55. Therefore, the replacement work of the filter 51 becomes easy.

In the filter changer 101 of the comparative example, since the resin outflow hole 81 is provided in the holder portion 80A, the diameter of the cross section of the filter holder 80 is large. Since the cross-sectional shape of the filter 51 is close to a rectangle, the filter holder 80 is larger than necessary than the filter 51. The housing 70 is also enlarged according to the size of the filter holder 80.

On the other hand, in the filter changer 100 of this embodiment, the filter holder 20 has a rectangular cross section. The size of the filter holder 20 is the minimum size necessary to accommodate the filter 51. Therefore, the filter changer 100 is downsized.

For example, when the filter 51 in which ten 7-inch filter elements are laminated is used, the cross-sectional size of the housing 70 of the comparative example is 550 mm in length and 550 mm in width. The cross-sectional size of the housing 10 of this embodiment is 400 mm in length and 400 mm in width. “Cross section of housing” means a cross section of the housing orthogonal to the sliding direction SL.

When the filter 51 in which 20 7-inch filter elements are stacked is used, the size of the cross section of the housing 70 of the comparative example is 650 mm in length and 650 mm in width. The size of the cross section of the housing 10 of this embodiment is 500 mm in length and 400 mm in width.

When using the filter 51 in which 30 7-inch filter elements are stacked, the size of the cross section of the housing 70 of the comparative example is 750 mm in length and 750 mm in width. The size of the cross section of the housing 10 of this embodiment is 600 mm in length and 400 mm in width.

As described above, as the filter 51 becomes larger, the size of the housing deviates greatly between the present embodiment and the comparative example. In this embodiment, even if the filter 51 becomes large, the housing 10 is not made larger than in the comparative example.

FIG. 10 is a schematic view of a film manufacturing apparatus 1000 having the filter changer 100 of this embodiment.

The film manufacturing apparatus 1000 includes an extruder 1001, a gear pump 1002, a filter unit 1003, a die 1004, a film molding unit 1005, a foreign matter inspection device 1006, and a winding machine 1007. The filter unit 1003 filters the resin supplied from the extruder 1001. The film forming unit 1005 forms a film using the resin filtered by the filter unit 1003. The filter unit 1003 has the filter changer 100 of the present embodiment described above. Therefore, a highly reliable film is manufactured.

[Second embodiment]
FIG. 11 is a cross-sectional view of the filter changer 110 according to the second embodiment. In this embodiment, the same components as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

The difference between the present embodiment and the first embodiment is the flow direction of the resin R. The resin R1 containing impurities is supplied to the filter unit 50 from below in the vertical direction. The resin R2 filtered by the filter unit 50 is discharged vertically upward. Along with this change, the configurations of the housing 10 and the filter holder 20 are slightly changed from the first embodiment.

For example, the resin supply block 11 and the resin discharge block 12 are arranged to face each other in the vertical direction. The first plate portion 13 and the second plate portion 14 are arranged so as to face each other in the horizontal direction. The filter unit 50 is attached to the holder portion 20A with the resin inflow hole 56a directed vertically downward and the resin outflow hole 57a directed vertically upward.

The resin supply block 11 has, for example, a resin supply pipe portion 41. The resin supply pipe part 41 is fixed to the first plate part 13 and the second plate part 14 by bolts. The housing 10 does not include the third plate portion 42 shown in FIG. In the present embodiment, the configuration corresponding to the third plate portion 42 is integrated with the resin supply pipe portion 41.

The resin discharge block 12 has, for example, a resin discharge pipe portion 45, a second intermediate plate portion 47, and a bolt 48. The second intermediate plate portion 47 is provided with a through hole 47a through which the outflow portion 45b passes. The second intermediate plate portion 47 is superposed on the fourth plate portion 46 and the main body portion 45a from the side opposite to the slide space SP side. The outer peripheral portion of the second intermediate plate portion 47 is fixed to the fourth plate portion 46 by bolts. A bolt 48 is attached to the inner peripheral portion of the second intermediate plate portion 47. The bolt 48 penetrates the second intermediate plate portion 47 and is in contact with the main body portion 45a. The body portion 45a is pressed against the filter unit 50 side by the bolt 48.

The bolt 48 functions as a pressing member that presses the resin discharge pipe portion 45 against the filter unit 50. The filter unit 50 and the resin supply pipe portion 41 and the resin discharge pipe portion 45 strongly adhere to each other. Therefore, the sealing property between the filter unit 50 and the resin supply pipe portion 41 and the resin discharge pipe portion 45 is improved. Therefore, the filter holder 20 is unlikely to be soiled with the resin R.

In the filter changer 110 of this embodiment, the filtered resin R2 is discharged vertically upward. This configuration is suitable when the resin R2 is supplied to the die 1004 from vertically above.

[Third embodiment]
FIG. 12 is a schematic view of a filter changer 120 according to the third embodiment. In this embodiment, the same components as those in the second embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

The difference between this embodiment and the second embodiment is that the filter holder 20 is configured as a rotary plate. The filter holder 20 rotates about a rotation axis parallel to the vertical direction. The plurality of holder portions 20A are arranged side by side in the rotation direction of the filter holder 20. The disc portion 20B other than the holder portion 20A functions as a partition member that partitions the adjacent holder portions 20A.

The slide device 30 drives the filter holder 20 to rotate. As a result, the slide device 30 slides the filter holder 20 along the slide space SP and switches the filter unit 50 connected to the resin supply hole 11a and the resin discharge hole 12a.

The slide device 30 slides the plurality of holder portions 20A in the slide direction SL. The slide direction SL is a direction parallel to the arrangement direction of the plurality of holder portions 20A. Only one holder portion 20A is accommodated in the slide space SP. The other holder portion 20A is arranged outside the slide space SP.

In the filter changer 120 of this embodiment, a plurality of holders 20A are arranged side by side in the rotation direction. Therefore, many holder parts 20A can be arranged compactly.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to such embodiments. The contents disclosed in the embodiments are merely examples, and various modifications can be made without departing from the spirit of the present invention. Appropriate changes made without departing from the spirit of the present invention naturally belong to the technical scope of the present invention. All the inventions that can be implemented by those skilled in the art by appropriately changing the design based on the above-mentioned inventions also belong to the technical scope of the invention as long as they include the gist of the invention.

10 Housing 11a Resin Supply Hole 12a Resin Discharge Hole 15 First Heater 20 Filter Holder 20A Holder Part 21 First Sidewall 21S First Slit 22 Second Sidewall 22S Second Slit 23 Partition Member 26 Current Conductor 30 Sliding Device 41 resin supply pipes 44, 48 bolts (pressurizing members)
45 Resin discharge pipe part 50 Filter unit 50A Body part 50B First end part 50C Second end part 51 Filter 55 Filter case 56a Resin inflow hole 57a Resin outflow hole 59 Second heater 100, 110, 120 Filter changer 1000 Film Manufacturing apparatus 1001 Extruder 1003 Filter section 1005 Film molding sections G1 and G2 Gap R Resin SP slide space

Claims (12)

A filter holder to which multiple filter units are attached from vertically above,
A housing having a slide space in which the filter holder slides, and a resin supply hole and a resin discharge hole provided at a position facing the slide space;
A slide device that slides the filter holder along the slide space to switch the filter unit connected to the resin supply hole and the resin discharge hole,
Filter changer with. The filter unit includes a filter case having a resin inflow hole and a resin outflow hole, and a filter that is housed in the filter case and filters resin that has flowed in from the resin inflow hole and discharges it to the resin outflow hole. Item 1. The filter changer according to item 1. The housing includes a resin supply pipe portion provided with the resin supply hole, a resin discharge pipe portion provided with the resin discharge hole, and a resin supply pipe portion or a resin discharge pipe portion for pressing the resin discharge pipe portion against the filter unit. The pressure changer, The filter changer according to claim 2. The filter case has a body portion in which the filter is housed, a first end portion provided with the resin inflow hole, and a second end portion provided with the resin outflow hole,
The filter changer according to claim 3, wherein outer diameters of the first end portion and the second end portion are smaller than an outer diameter of the body portion. There is a gap between the peripheral portion of the tip surface of the first end and the resin supply pipe portion,
The filter changer according to claim 4, wherein a gap exists between the resin discharge pipe portion and the peripheral edge portion of the tip surface of the second end portion. The filter holder has a first side wall facing the resin supply pipe section and a second side wall facing the resin discharge pipe section,
The first side wall has a first slit into which the first end is fitted from vertically above,
The filter changer according to claim 4 or 5, wherein the second side wall has a second slit into which the second end is fitted from above in the vertical direction. The filter changer according to claim 6, wherein the first slit, the second slit, the first end portion, and the second end portion each have a shape elongated in the vertical direction. The filter changer according to any one of claims 1 to 7, wherein the housing is provided with a first heater. The filter case has a body portion in which the filter is housed,
The housing is provided with a first heater,
The body is provided with a second heater
The filter changer according to any one of claims 2 to 7 . The filter holder has a plurality of holder parts to which the filter unit is attached,
The filter changer according to claim 9, wherein an energization section that energizes the second heater is provided for each holder section. The adjacent holder portions are partitioned by a partition member,
The filter changer according to claim 9 or 10, wherein a gap is provided between the filter unit mounted on the holder portion and the partition member. An extruder,
A filter unit for filtering the resin supplied from the extruder,
A film molding unit for molding a film using the resin filtered by the filter unit,
Have
The said filter part is a film manufacturing apparatus which has the filter changer of any one of Claims 1-11.