WO2019188477A1 - フィルム成形装置 - Google Patents

フィルム成形装置 Download PDF

Info

Publication number
WO2019188477A1
WO2019188477A1 PCT/JP2019/011092 JP2019011092W WO2019188477A1 WO 2019188477 A1 WO2019188477 A1 WO 2019188477A1 JP 2019011092 W JP2019011092 W JP 2019011092W WO 2019188477 A1 WO2019188477 A1 WO 2019188477A1
Authority
WO
WIPO (PCT)
Prior art keywords
film thickness
lip portion
discharge port
die
heat radiating
Prior art date
Application number
PCT/JP2019/011092
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
勝之 中野
隆宏 塩田
Original Assignee
住友重機械モダン株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 住友重機械モダン株式会社 filed Critical 住友重機械モダン株式会社
Priority to CN201980022279.4A priority Critical patent/CN111918759B/zh
Publication of WO2019188477A1 publication Critical patent/WO2019188477A1/ja

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating

Definitions

  • the present invention relates to a film forming apparatus.
  • the conventional film forming apparatus described above can partially control the film thickness in the circumferential direction, the uniformity of the film thickness can be improved. However, the demand for higher uniformity does not cease.
  • the present invention has been made in view of such circumstances, and an object thereof is to provide a film forming apparatus capable of further improving the uniformity of the film thickness.
  • a film forming apparatus includes a die for extruding a molten resin in a tube shape from an annular discharge port, and a film for adjusting the film thickness of the molten resin extruded from the discharge port A thickness adjusting unit.
  • the die includes a lip portion that defines the outer periphery of the discharge port.
  • the film thickness adjustment unit is a plurality of adjustment units arranged so as to surround the lip part, each of which includes a plurality of adjustment units that elastically deform the lip part to adjust the radial width of the discharge port, and the lip Homogenizing means for homogenizing the temperature of the part.
  • the uniformity of the film thickness can be further improved.
  • FIG. 3 is a perspective view showing the adjustment unit of FIG. 2.
  • FIG. 3 is a perspective view showing the adjustment unit of FIG. 2.
  • 8A and 8B are explanatory diagrams for explaining the operation of the adjustment unit.
  • FIG. 3 is a cross-sectional view showing the adjustment unit of FIG.
  • FIG. 2 It is a block diagram which shows typically the function and structure of a control apparatus of FIG.
  • FIG. 4 is an end view taken along line AA in FIG. 3.
  • FIGS. 13A and 13B are end views showing a heat dissipating member according to another modification and the periphery thereof.
  • FIG. 1 shows a schematic configuration of a film forming apparatus 1 according to the embodiment.
  • the film forming apparatus 1 forms a tubular film.
  • the film forming apparatus 1 includes a die 10, a film thickness adjusting unit 2, a pair of stabilizing plates 4, a pair of pinch rolls 5, a thickness measuring sensor 6, and a control device 7.
  • the die 10 shapes the molten resin supplied from an extruder (not shown) into a tube shape.
  • the die 10 forms the molten resin into a tube shape by extruding the molten resin from a ring-shaped slit 18 (described later in FIG. 2).
  • the film thickness adjusting unit 2 adjusts the film thickness and cools the molten resin extruded from the die 10. When the molten resin is cooled, a film is formed.
  • the pair of stabilizing plates 4 is disposed above the film thickness adjusting unit 2 and guides the formed film between the pair of pinch rolls 5.
  • the pinch roll 5 is disposed above the stabilizer 4 and is folded flat while pulling up the guided film.
  • the folded film is wound up by a winder (not shown).
  • the thickness measuring sensor 6 is disposed between the film thickness adjusting unit 2 and the stabilizing plate 4.
  • the thickness measurement sensor 6 measures the film thickness at each position in the circumferential direction around the tube-shaped film at a predetermined cycle.
  • the measurement value by the thickness measurement sensor 6 is sent to the control device 7.
  • the control device 7 sends a control command corresponding to the measurement result received from the thickness measurement sensor 6 to the film thickness adjusting unit 2.
  • the film thickness adjusting unit 2 adjusts the width of the slit 18 (particularly, its discharge port) so that the variation in film thickness is reduced.
  • FIG. 2 is a cross-sectional view showing the die 10 and the film thickness adjusting unit 2.
  • FIG. 3 is a top view of the die 10 and the film thickness adjusting unit 2. In FIG. 3, the cooling device 3, the support member 58, and the closing member 66 are not shown.
  • the die 10 includes a die main body 11, an inner peripheral member 12, and an outer peripheral member 14.
  • the inner peripheral member 12 is a substantially columnar member placed on the upper surface of the die body 11.
  • the outer peripheral member 14 is an annular member and surrounds the inner peripheral member 12. Between the inner peripheral member 12 and the outer peripheral member 14, a slit 18 extending in a vertical direction in a ring shape is formed. The molten resin flows upward through the slit 18, and the molten resin is pushed out from the discharge port (that is, the upper end opening) 18a of the slit 18 to form a film having a thickness corresponding to the width of the discharge port 18a.
  • a plurality of heaters 56 are mounted on the outer periphery of the die body 11.
  • heaters 56 are mounted on the outer periphery of the lower portion of the outer peripheral member 14 (specifically, a large diameter portion 27 described later) and the outer periphery of the upper portion of the outer peripheral member 14 (specifically, a small diameter portion 25 described later).
  • the die body 11 and the outer peripheral member 14 are heated to a required temperature by the heater 56. Thereby, the molten resin flowing inside the die 10 can be maintained at an appropriate temperature and in a molten state.
  • the film thickness adjusting unit 2 includes the cooling device 3, a plurality of (here, 32) adjustment units 16, a support member 58, a closing member 66, and a plurality (the same number as the adjustment unit 16, 32 here) of heat dissipation. Member 68.
  • the cooling device 3 is disposed above the die 10.
  • the cooling device 3 includes an air ring 8 and an annular rectifying member 9.
  • the air ring 8 is a ring-shaped housing whose inner peripheral portion is recessed downward.
  • a ring-shaped air outlet 8 a that opens upward is formed on the inner peripheral portion of the air ring 8.
  • the air outlet 8a is formed to be concentric with the ring-shaped slit 18 in particular.
  • a plurality of hose ports 8b are formed at equal intervals in the circumferential direction on the outer periphery of the air ring 8.
  • a hose (not shown) is connected to each of the plurality of hose ports 8b, and cooling air is sent into the air ring 8 from the blower (not shown) via this hose.
  • the cooling air sent into the air ring 8 is blown from the blowout port 8a and blown to the molten resin.
  • the rectifying member 9 is disposed in the air ring 8 so as to surround the air outlet 8a.
  • the rectifying member 9 rectifies the cooling air sent into the air ring 8. Thereby, cooling air blows off from the blower outlet 8a with the uniform flow volume and wind speed in the circumferential direction.
  • the plurality of adjustment units 16 are arranged, for example, at equal intervals in the circumferential direction so as to surround the upper end side of the outer circumferential member 14.
  • the adjustment unit 16 is attached to the outer peripheral member 14 in a cantilevered manner.
  • Each of the plurality of adjustment units 16 is configured to apply a radially inward pressing load or a radially outward tensile load to the outer peripheral member 14. Therefore, by adjusting the plurality of adjusting units 16, the width of the discharge port 18a can be partially adjusted in the circumferential direction, and the film thickness can be partially controlled in the circumferential direction.
  • the support member 58 is an annular member, and is placed and fixed on the plurality of adjustment units 16 so as to surround the upper part of the outer peripheral member 14.
  • the cooling device 3 is fixed above the support member 58. That is, the support member 58 supports the cooling device 3.
  • the closing member 66 is a thin disk-like member having a hole formed in the center, and is provided between the inner periphery of the air ring 8 and the plurality of adjusting units 16. A detailed functional configuration of the closing member 66 will be described later with reference to FIG.
  • the plurality of heat radiating members 68 are disposed so as to surround the outer peripheral member 14 (specifically, a flexible lip portion 22 described later), and function as a uniformizing means for making the temperature of the flexible lip portion 22 more uniform in the circumferential direction. To do.
  • the detailed functional configuration of the heat dissipation member 68 will be described later with reference to FIG.
  • FIG. 4 and 5 are a perspective view and a side view showing the upper part of the outer peripheral member 14 and the adjustment unit 16 attached thereto. 4 and 5, only one adjustment unit 16 is shown, and the display of the remaining adjustment units 16 is omitted. 6 and 7 are perspective views showing the adjustment unit 16. FIG. 7 shows a state where one of the pair of support members 30 is removed.
  • the upper part of the outer peripheral member 14 includes a small diameter portion 25 formed at the upper end, a medium diameter portion 26 formed below the small diameter portion 25 with a larger diameter than the small diameter portion 25, and a medium diameter portion below the medium diameter portion 26. And a large-diameter portion 27 having a larger diameter than 26.
  • the small diameter portion 25 has a flexible lip portion 22.
  • the flexible lip portion 22 refers to a portion of the small-diameter portion 25 above the concave notch portion 20 provided along the circumferential direction.
  • the flexible lip part 22 is elastically deformed with the notch part 20 as a boundary.
  • the flexible lip portion 22 includes a cylindrical main body portion 28 and an annular protruding surrounding portion 29 that protrudes radially outward from the main body portion 28.
  • the adjustment unit 16 includes a pair of support members 30 attached to the outer peripheral member 14, a rotation shaft 32 fixed to the pair of support members 30, and a lever 34 supported rotatably about the rotation shaft 32 as a fulcrum.
  • the operating rod 36 that operates in the axial direction upon receiving the rotational force of the lever 34, the connecting member 38 that connects the operating rod 36 and the flexible lip portion 22 in the axial direction, and the operating rod that is slidable in the axial direction are supported.
  • a bearing member 40 that performs rotation, and an actuator 24 that applies a rotational force to the lever 34.
  • the pair of support members 30 are formed in a flat plate shape and screwed to the outer peripheral member 14 so as to be parallel to each other.
  • a space for interposing the lever 34 is provided between the pair of support members 30.
  • the bearing member 40 is formed in a rectangular shape and is screwed to the outer peripheral member 14 on the radially inner side of the support member 30.
  • the bearing member 40 is formed with an insertion hole 42 penetrating in the radial direction.
  • the inner peripheral surface of the insertion hole 42 constitutes a so-called sliding bearing (oil-free type bearing), and supports the operating rod 36 so as to be slidable.
  • the rotation shaft 32 is fixed to the pair of support members 30 so that the shaft faces the horizontal direction and is substantially orthogonal to the radial direction.
  • the operating rod 36 is formed in a stepped cylindrical shape, and an intermediate portion thereof is inserted into the insertion hole 42 of the bearing member 40.
  • a reduced diameter portion 44 is provided on the outer side in the axial direction of the operating rod 36.
  • the reduced diameter portion 44 functions as a connecting portion with the lever 34 as will be described later.
  • a concave engaging portion 46 is provided on the axially inner side of the operating rod 36.
  • the engaging portion 46 functions as a connecting portion with the connecting member 38 as will be described later.
  • the outer peripheral surface (hereinafter referred to as “pressure receiving surface 23”) of the overhang surrounding portion 29 of the flexible lip portion 22 faces the distal end surface of the operating rod 36.
  • the connecting member 38 is formed in a bifurcated shape in a longitudinal sectional view. Specifically, the connecting member 38 is provided with engaging portions 48 and 50 protruding downward on the surface facing the outer peripheral member 14 in the axial direction.
  • the engaging portion 48 is generally complementary to the engaging portion 46 of the actuating rod 36.
  • An annular engaging groove 52 that is recessed downward in the axial direction is formed in the overhang surrounding portion 29 of the flexible lip portion 22.
  • the engaging portion 50 is substantially complementary to the engaging groove 52.
  • the operating rod 36 and the connecting member 38 are screwed so that the engaging portion 48 engages with the engaging portion 46 and the engaging portion 50 engages with the engaging groove 52.
  • the opposing surfaces of the engaging portion 48 and the engaging portion 46 are tapered surfaces.
  • the lever 34 has a long plate-like main body 60 extending in the radial direction, and one end of the lever 34 is rotatably supported by the rotation shaft 32.
  • the lever 34 is provided so that the main body 60 and the operating rod 36 are substantially parallel in the non-operating state.
  • a bifurcated connecting portion 62 is provided so as to extend from one end portion of the main body 60 in a direction perpendicular to the axis of the main body 60. That is, the connecting portion 62 is composed of a pair of connecting pieces 64, and the interval between them is slightly larger than the outer diameter of the reduced diameter portion 44 of the actuating rod 36, and their width is slightly smaller than the length of the reduced diameter portion 44. Yes. With such a configuration, the lever 34 and the operating rod 36 are connected in such a manner that the connecting portion 62 fits into the reduced diameter portion 44.
  • the present invention is not limited to this embodiment as long as the rotational force of the lever 34 is directly applied to the operating rod 36.
  • the connecting portion 62 may not extend from the axis of the main body 60 in the direction perpendicular to the axis.
  • the axis of the main body 60 and the extending direction of the connecting portion 62 may form an acute angle or an obtuse angle.
  • the main body 60 and the operating rod 36 may not be parallel when the lever 34 is in an inoperative state.
  • the actuator 24 is pneumatically driven in the present embodiment, and includes two sets of bellows 70 and 72 and bellows 71 and 73 that are operated by supplying and discharging compressed air, a first base 75, and a shaft of the first base 75.
  • a second base 76 disposed on the lower side in the direction and four connecting rods 77 are included.
  • the first base 75 and the second base 76 are spaced apart in the axial direction and are connected by four connecting rods 77.
  • Bellows 70 and 72 are disposed between the lever 34 and the first base 75, and bellows 71 and 73 are disposed between the lever 34 and the second base.
  • the end portion that is the power point of the lever 34 is supported so as to be sandwiched between the bellows 70 and 72 and the bellows 71 and 73.
  • the lever 34 is driven to rotate clockwise or counterclockwise in the drawing.
  • compressed air is supplied from a pressure adjusting device (not shown) via a supply path 75 a formed in the first base 75 and a supply path 76 a supplied to the second base 76.
  • the pressure adjustment device controls the pressure in the bellows 70 to 73 based on a control command from an adjustment operation control unit 83 (described later).
  • FIG. 8 is an explanatory diagram for explaining the operation of the adjustment unit 16.
  • FIG. 8A shows the neutral state of the adjustment unit 16 (the bellows 70 to 73 are both inactive), and
  • FIG. 4B shows the expansion operation state of the adjustment unit 16 (only the bellows 70 and 72 are activated). Status).
  • the rotational force of the lever 34 is directly applied to the operating rod 36 at the point of action P. That is, the rotational force of the lever 34 is applied to the flexible lip portion 22 as a force in the axial direction of the operating rod 36. At that time, since the operating rod 36 is stably supported by the outer peripheral member 14, the axial force is efficiently transmitted to the flexible lip portion 22. As a result, the driving force for adjusting the gap between the inner peripheral member 12 and the outer peripheral member 14 can be efficiently applied.
  • L1 is configured to be orthogonal to the axis L2 of the operating rod 36.
  • the present invention is not limited to this embodiment as long as the rotational force of the lever 34 is directly applied to the operating rod 36.
  • the direction at the action point P of the rotational force of the lever 34 may be such that the axial direction of the actuating rod 36 (also referred to as “axial force acting direction” for convenience) does not match (for convenience, also referred to as “rotational force acting direction”).
  • the axis of the main body 60 and the extending direction of the connecting portion 62 may form an acute angle or an obtuse angle.
  • the axis of the main body 60 and the extending direction of the connecting portion 62 may be perpendicular, while the main body 60 and the operating rod 36 may not be parallel.
  • the axis of the main body 60 and the extending direction of the connecting portion 62 may form an acute angle or an obtuse angle, and the main body 60 and the actuation rod 36 may not be parallel.
  • FIG. 9 is a cross-sectional view showing the adjustment unit 16 and its surroundings.
  • air passes through a plurality of (here, 32) gaps between the adjustment units 16 and enters the space 88 between the air ring 8 and the plurality of adjustment units 16. Flows into the space 90 from the space 88. Since the gap between the adjusting units 16 is discontinuous in the circumferential direction, the air volume of the air flowing into the space 88 varies in the circumferential direction, and therefore the air volume of the air flowing from the space 88 into the space 90 also varies in the circumferential direction.
  • a closing member 66 is provided between the inner periphery of the air ring 8 and the adjustment unit 16.
  • the closing member 66 is configured to close the gap 84.
  • the closing member 66 is configured to close the flow path from between the outer peripheral member 14 and the plurality of adjustment units 16 and the air ring 8 to the upper side of the air ring 8 through the inner peripheral side of the air ring 8.
  • annular recess 94 that is recessed downward is formed on the outer edge of the upper end of the main body portion 28 of the flexible lip portion 22.
  • the closing member 66 has an inner diameter larger than the inner diameter of the bottom surface 94a of the recess 94 (the outer diameter of the upper surface 28a of the main body 28) and smaller than the outer diameter of the bottom surface 94a.
  • the closing member 66 is provided such that the inner peripheral end of the lower surface 66 a abuts (places) the bottom surface 94 a of the recess 94, and the outer peripheral end of the lower surface 66 a abuts (places) the support member 58. ing.
  • the air flow into the space 90 is suppressed by the closing member 66.
  • the closing member 66 contacts the flexible lip portion 22 but is not fixed to the flexible lip portion 22, the flexible lip portion 22 can be elastically deformed by receiving a load from the adjustment unit 16. That is, the closing member 66 does not hinder the elastic deformation of the flexible lip portion 22.
  • FIG. 10 is a block diagram schematically showing the function and configuration of the control device 7.
  • Each block shown here can be realized in hardware by an element such as a CPU of a computer or a mechanical device, and in software it is realized by a computer program or the like.
  • Draw functional blocks Therefore, those skilled in the art will understand that these functional blocks can be realized in various forms by a combination of hardware and software.
  • the control device 7 includes a holding unit 80, an acquisition unit 81, a determination unit 82, and an adjustment operation control unit 83.
  • the acquisition unit 81 acquires a measurement value obtained by the thickness measurement sensor 6.
  • the holding unit 80 includes a film thickness and a load that the adjustment unit 16 should apply to the outer peripheral member 14 in order to set a film to be formed later to a target film thickness when the film thickness is measured by the thickness measurement sensor 6. Are stored in association with each other.
  • the determining unit 82 determines the load that each adjusting unit 16 should apply to the outer circumferential member 14 in order to reduce the variation in film thickness. In particular, the determination unit 82 determines a load to be applied to the outer circumferential member 14 with reference to the measurement value by the thickness measurement sensor 6 and the holding unit 80. Further, the determination unit 82 calculates how much the pressures of the bellows 70 to 73 of the adjustment unit 16 are controlled so that the determined load is applied to the outer peripheral member 14. The adjusting operation control unit 83 sends a control command to the pressure adjusting device so that the pressure of the bellows 70 to 73 becomes the pressure calculated by the determining unit 82.
  • the operation of the film forming apparatus 1 configured as described above will be described.
  • the molten resin is extruded from the discharge port 18a of the die 10, and the cooling device 3 blows cooling air to the extruded molten resin. Thereby, a film is shape
  • the thickness measurement sensor 6 measures the film thickness at each position in the circumferential direction at a predetermined cycle.
  • the control device 7 controls each adjustment unit 16 of the film thickness adjustment unit 2 based on the measurement value by the thickness measurement sensor 6 so that the variation in the film thickness is reduced.
  • FIG. 11 is an AA end view of FIG. In FIG. 11, the display of the closing member 66 is omitted. Please refer to FIG. 3 and FIG.
  • each component is made of a metal material, that is, a material having a relatively high heat transfer coefficient, and each component is not heated by the heater 56 like the die 10. Therefore, the adjustment unit 16 functions as a heat radiating member for the die 10, particularly the flexible lip portion 22 thereof.
  • the adjusting unit 16 Due to the size of the adjusting unit 16, the adjusting unit 16 cannot be arranged so that the connecting member 38 is arranged without a gap in the circumferential direction. Therefore, a plurality of adjustment units 16 that function as heat radiating members are connected to the overhanging surrounding portion 29 of the flexible lip portion 22 at intervals in the circumferential direction.
  • connection portion a portion to which the adjustment unit 16 that functions as a heat dissipation member is connected (hereinafter referred to as a “connection portion”) and an adjustment unit 16 that functions as a heat dissipation member are connected to the overhang surrounding portion 29.
  • connection portion a portion to which the adjustment unit 16 that functions as a heat dissipation member is connected
  • connection portion an adjustment unit 16 that functions as a heat dissipation member
  • the main body portion 28 of the flexible lip portion 22 also corresponds to the portion corresponding to the connecting portion of the overhang surrounding portion 29 (that is, the radially inner side of the connecting portion) and the non-connecting portion of the overhang surrounding portion 29.
  • a temperature difference occurs between the portions, and as a result, the heat taken away from the molten resin by the main body portion 28 corresponds to the portion corresponding to the connection portion of the overhang surrounding portion 29 and the non-connection portion of the overhang surrounding portion 29.
  • the temperature of the molten resin extruded from the die 10 is not uniform in the circumferential direction.
  • the timing at which the molten resin solidifies becomes nonuniform in the circumferential direction
  • the film thickness becomes nonuniform in the circumferential direction.
  • the heat radiating member 68 is connected to the unconnected portion of the overhang surrounding portion 29. That is, the connecting member 38 and the heat radiating member 68 of the adjustment unit 16 are alternately connected to the overhang surrounding portion 29 in the circumferential direction with almost no gap. Accordingly, since the heat radiating member is connected to the overhanging surrounding portion 29 in both the connecting portion and the non-connecting portion, the temperature of the overhanging surrounding portion 29 and the flexible lip portion 22 is compared with the case where the heat radiating member 68 is not provided. Becomes more uniform in the circumferential direction.
  • the heat radiating member 68 of the present embodiment includes a first member 78 and a second member 79.
  • the first member 78 is a member that is substantially the same as the connecting member 38 of the adjustment unit 16 (that is, the shape, size, and material are the same in design).
  • the second member 79 is a member corresponding to the tip side of the actuating rod 36, that is, the portion to which the connecting member 38 is attached. Specifically, the second member 79 only needs to include a portion with which the engaging portion 48 of the coupling member 38 of the concave engaging portion 46 of the operating rod 36 of the adjusting unit 16 engages (contacts). .
  • the adjustment unit 16 is connected to (in contact with) the intermediate diameter portion 26 and the large diameter portion 27 in addition to the overhang surrounding portion 29, and is supported by them.
  • the heat radiating member 68 is connected (contacted) only to the overhang surrounding portion 29 and is supported only by the overhang surrounding portion 29.
  • the connecting member 38 and the heat radiating member 68 of the adjustment unit 16 are substantially spaced in the circumferential direction in the overhang surrounding portion 29 of the flexible lip portion 22. Are connected alternately. That is, some heat radiating member is connected to the projecting surrounding portion 29 in the circumferential direction with almost no gap.
  • the temperature of the overhanging surrounding portion 29 becomes more uniform in the circumferential direction, and as a result, the temperature of the molten resin extruded from the die 10 becomes more uniform in the circumferential direction.
  • the film thickness becomes more uniform in the circumferential direction.
  • the heat radiating member 68 is connected only to the overhanging surrounding portion 29, it is also connected to the medium diameter portion 26 and the large diameter portion 27. In comparison, the heat of the overhang surrounding portion 29 is dissipated. Therefore, compared with the case where the heat radiating member 68 is also connected to the medium diameter portion 26 and the large diameter portion 27, the adjustment unit 16 reduces the amount of heat that the heat radiating member 68 takes away from the overhang surrounding portion 29. The amount of heat taken away from the surrounding portion 29 can be approached. As a result, the temperature of the molten resin extruded from the die 10 becomes more uniform in the circumferential direction, and the film thickness becomes more uniform in the circumferential direction.
  • the first member 78 which is one of the constituent parts of the heat radiating member 68, is the same as the connecting member 38, which is one of the constituent parts of the adjustment unit 16, so As a result, the manufacturing cost of the member 68 and the film forming apparatus 1 can be reduced.
  • FIG. 12 is an end view showing the heat dissipating member 68 and its periphery according to a modification.
  • FIG. 12 corresponds to FIG.
  • the heat radiating member 68 extends to above the bearing members 40 of the two adjacent adjusting units 16 and is placed on them.
  • the second member 79 extends to above the bearing member 40.
  • the second member 79 extends to above the bearing member 40 while being bent, and is placed on the bearing member 40.
  • the heat radiating member is merely placed on the bearing member 40 and is not fixed to the bearing member 40 so as not to hinder the elastic deformation of the flexible lip portion 22.
  • the heat radiating member 68 is supported at two locations, that is, the overhang surrounding portion 29 and the bearing member 40 of the two adjacent adjustment units 16.
  • the heat dissipation member 68 is stably held as compared with the case where it is supported only by the above.
  • FIGS. 13A and 13B are end views showing the heat dissipating member 68 and its surroundings according to another modification, respectively.
  • FIGS. 13A and 13B respectively correspond to FIG.
  • the heat dissipating member 68 protrudes downward and engages with the engaging groove 52, and extends in the vertical direction on the outer side in the radial direction from the overhang surrounding portion 29, and comes into contact with the upper surface of the medium diameter portion 26.
  • the extending portion 97 includes a connecting portion 98 that connects the engaging portion 96 and the extending portion 97.
  • the heat radiating member 68 is press-fitted into the overhanging surrounding portion 29 so that the overhanging surrounding portion 29 is sandwiched between the engaging portion 96 and the extending portion 97, so that the overhanging surrounding portion 29. Fixed against.
  • the extending part 97 includes an upper part 97a, a lower part 97b positioned below the upper part 97a, and an elastic hinge part that connects the upper part 97a and the lower part 97b. 97c.
  • the lower portion 97 b abuts on the upper surface of the medium diameter portion 26 of the outer peripheral member 14 of the die 10.
  • the elastic hinge portion 97c is configured to be elastically deformable with the elastic deformation of the flexible lip portion 22.
  • the elastic hinge portion 97c is formed such that at least the thickness in the radial direction is thinner than the thickness of the upper portion 97a and the lower portion 97b.
  • the lower end portion of the extending portion 97 is formed in a circular shape in a longitudinal sectional view.
  • the lower end portion of the extending portion 97 may be formed in a hemispherical shape.
  • the heat dissipation member 68 tilts.
  • the lower end portion of the extending portion 97 of the heat dissipation member 68 rolls on the upper surface of the medium diameter portion 26.
  • the heat radiating member 68 can be tilted by forming the lower end portion in a circular shape in cross-sectional view so that the lower end portion of the extending portion 97 can make rolling contact with the upper surface of the medium diameter portion 26. Therefore, even if the lower end of the extending portion 97 of the heat dissipation member 68 is in contact with the upper surface of the medium diameter portion 26, the elastic deformation of the flexible lip portion 22 is not hindered.
  • the heat radiating member 68 is supported at two locations of the overhang surrounding portion 29 and the medium diameter portion 26, and therefore, the heat dissipating member 68 is supported only by the overhang surrounding portion 29. In comparison, the heat dissipation member 68 is stably held.
  • the material, size, and shape of the heat radiating member 68 are determined so that the heat resistance of the heat radiating member 68 is closer to the heat resistance of the adjusting unit 16 and preferably the same. do it.
  • the heat dissipating member 68 by configuring the heat dissipating member 68 with a material having a smaller thermal resistance than the adjustment unit 16, the heat dissipating member 68 smaller than the adjustment unit 16 can realize substantially the same heat resistance as the adjustment unit 16, or Compared with the case where the heat radiating member 68 is made of the same material, the thermal resistance can be made closer to the adjustment unit 16.
  • the material, size, and shape can be determined without considering the strength of the heat radiating member 68.
  • the film forming apparatus 1 may include a heat insulating material as a uniformizing unit instead of or in addition to the heat radiating member 68.
  • the heat insulating material may be provided between the operating rod 36 and the connecting member 38 of the adjustment unit 16 and the flexible lip portion 22 so that the adjustment unit 16 does not contact the flexible lip portion 22.
  • the heat of the flexible lip portion 22 is not transferred to the adjustment unit 16, so that the adjustment unit 16 is connected to the overhang surrounding portion 29 with an interval in the circumferential direction.
  • the occurrence of a temperature difference in the circumferential direction at the exit surrounding portion 29 is suppressed, and as a result, the film thickness becomes more uniform in the circumferential direction.
  • the film thickness is partially changed in the circumferential direction by widening or narrowing the radial gap of the discharge port 18a of the slit 18 by the adjustment unit 16 has been described. Not limited.
  • the film thickness may be partially changed in the circumferential direction by partially changing at least one of the air volume and the temperature of the cooling air blown from the cooling device 3 in the circumferential direction.
  • the cooling device 3 may include a plurality of valves and a plurality of heaters in the air ring 8 for adjusting the air volume.
  • the present invention can be used for a film forming apparatus.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
PCT/JP2019/011092 2018-03-26 2019-03-18 フィルム成形装置 WO2019188477A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201980022279.4A CN111918759B (zh) 2018-03-26 2019-03-18 薄膜成型装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-058112 2018-03-26
JP2018058112A JP6985965B2 (ja) 2018-03-26 2018-03-26 フィルム成形装置

Publications (1)

Publication Number Publication Date
WO2019188477A1 true WO2019188477A1 (ja) 2019-10-03

Family

ID=68058884

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/011092 WO2019188477A1 (ja) 2018-03-26 2019-03-18 フィルム成形装置

Country Status (4)

Country Link
JP (1) JP6985965B2 (zh)
CN (1) CN111918759B (zh)
TW (1) TWI695777B (zh)
WO (1) WO2019188477A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7411478B2 (ja) * 2020-03-31 2024-01-11 住友重機械モダン株式会社 インフレーション成形装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5837139B2 (ja) * 1975-06-25 1983-08-13 東芝機械株式会社 エントウジヨウフイルムノ ヘンニクジドウチヨウセイソウチ
JPH09225995A (ja) * 1996-02-23 1997-09-02 Tomy Kikai Kogyo Kk 押出し成形における樹脂フィルムの偏肉調節方法および樹脂フィルム成形装置
JP2004330635A (ja) * 2003-05-08 2004-11-25 Towa Buroo Kk 押出しダイ
JP2014501186A (ja) * 2010-12-30 2014-01-20 ダウ グローバル テクノロジーズ エルエルシー 冷却されたダイランド部を有するダイアセンブリ
WO2017090694A1 (ja) * 2015-11-27 2017-06-01 住友重機械モダン株式会社 フィルム成形装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5837139B2 (ja) * 1975-06-25 1983-08-13 東芝機械株式会社 エントウジヨウフイルムノ ヘンニクジドウチヨウセイソウチ
JPH09225995A (ja) * 1996-02-23 1997-09-02 Tomy Kikai Kogyo Kk 押出し成形における樹脂フィルムの偏肉調節方法および樹脂フィルム成形装置
JP2004330635A (ja) * 2003-05-08 2004-11-25 Towa Buroo Kk 押出しダイ
JP2014501186A (ja) * 2010-12-30 2014-01-20 ダウ グローバル テクノロジーズ エルエルシー 冷却されたダイランド部を有するダイアセンブリ
WO2017090694A1 (ja) * 2015-11-27 2017-06-01 住友重機械モダン株式会社 フィルム成形装置

Also Published As

Publication number Publication date
JP2019166795A (ja) 2019-10-03
CN111918759B (zh) 2022-08-05
TWI695777B (zh) 2020-06-11
CN111918759A (zh) 2020-11-10
JP6985965B2 (ja) 2021-12-22
TW201940315A (zh) 2019-10-16

Similar Documents

Publication Publication Date Title
JP6913024B2 (ja) フィルム成形装置
WO2017170387A1 (ja) フィルム成形装置
WO2019188477A1 (ja) フィルム成形装置
CN108705758B (zh) 薄膜成型装置
JP6932527B2 (ja) ロール温調による塗工隙間制御を用いた塗工装置および塗工方法
JP7411478B2 (ja) インフレーション成形装置
WO2019188478A1 (ja) フィルム成形装置
TWI755398B (zh) 薄膜成形裝置
JP6704644B2 (ja) フィルム成形装置
JPH09300432A (ja) ダイリップ調整装置
JP7202952B2 (ja) ダイ装置および治具
JPS6028802Y2 (ja) 単動型操作器
JPH01148365A (ja) 塗液等計量弁操作用ジヤツキ

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19776851

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19776851

Country of ref document: EP

Kind code of ref document: A1