WO2022113839A1 - ノズル清掃装置、断熱材の製造装置、ノズル清掃方法、及び断熱材の製造方法 - Google Patents
ノズル清掃装置、断熱材の製造装置、ノズル清掃方法、及び断熱材の製造方法 Download PDFInfo
- Publication number
- WO2022113839A1 WO2022113839A1 PCT/JP2021/042196 JP2021042196W WO2022113839A1 WO 2022113839 A1 WO2022113839 A1 WO 2022113839A1 JP 2021042196 W JP2021042196 W JP 2021042196W WO 2022113839 A1 WO2022113839 A1 WO 2022113839A1
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- WO
- WIPO (PCT)
- Prior art keywords
- nozzle
- injection
- polyurethane foam
- cleaning device
- gas
- Prior art date
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims description 27
- 239000011810 insulating material Substances 0.000 title claims description 25
- 238000004519 manufacturing process Methods 0.000 title claims description 25
- 229920005830 Polyurethane Foam Polymers 0.000 claims abstract description 114
- 239000011496 polyurethane foam Substances 0.000 claims abstract description 114
- 239000002904 solvent Substances 0.000 claims abstract description 72
- 239000007921 spray Substances 0.000 claims abstract 6
- 238000002347 injection Methods 0.000 claims description 189
- 239000007924 injection Substances 0.000 claims description 189
- 238000009413 insulation Methods 0.000 claims 1
- 238000005507 spraying Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 84
- 239000007788 liquid Substances 0.000 description 34
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 13
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 9
- 239000004744 fabric Substances 0.000 description 8
- 239000006260 foam Substances 0.000 description 8
- 239000012948 isocyanate Substances 0.000 description 6
- 150000002513 isocyanates Chemical class 0.000 description 6
- 230000004048 modification Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- 229920005862 polyol Polymers 0.000 description 6
- 150000003077 polyols Chemical class 0.000 description 6
- 238000007654 immersion Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 2
- 239000002984 plastic foam Substances 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/80—Component parts, details or accessories; Auxiliary operations
- B29B7/802—Constructions or methods for cleaning the mixing or kneading device
- B29B7/803—Cleaning of mixers of the gun type, stream-impigement type, mixing heads
- B29B7/806—Cleaning of the discharge opening, e.g. orifice of the dispenser
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/58—Component parts, details or accessories; Auxiliary operations
- B29B7/72—Measuring, controlling or regulating
- B29B7/728—Measuring data of the driving system, e.g. torque, speed, power, vibration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
- B29B7/7404—Mixing devices specially adapted for foamable substances
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
- B29B7/76—Mixers with stream-impingement mixing head
- B29B7/7615—Mixers with stream-impingement mixing head characterised by arrangements for controlling, measuring or regulating, e.g. for feeding or proportioning the components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
- B29B7/76—Mixers with stream-impingement mixing head
- B29B7/7615—Mixers with stream-impingement mixing head characterised by arrangements for controlling, measuring or regulating, e.g. for feeding or proportioning the components
- B29B7/7626—Mixers with stream-impingement mixing head characterised by arrangements for controlling, measuring or regulating, e.g. for feeding or proportioning the components using measuring chambers of piston or plunger type
Definitions
- This disclosure relates to a nozzle cleaning device, a heat insulating material manufacturing device, a nozzle cleaning method, and a heat insulating material manufacturing method.
- Polyurethane foam is a plastic foam used for cushions, heat insulating materials, etc.
- the polyurethane foam is produced by mixing a liquid containing an isocyanate component and a liquid containing a polyol component at a high pressure in a mixing head to cause a chemical reaction.
- the produced polyurethane foam is discharged from the nozzle of the mixing head toward the inside of the mold, the wall surface, and the like.
- the discharged polyurethane foam adheres to the tip of the nozzle. Then, the adhered polyurethane is resinified and becomes a solid substance. Due to the presence of this solid matter, when the next polyurethane foam is discharged from the nozzle, the discharge speed or the discharge direction of the polyurethane foam changes. There is a problem that the discharge distribution of the polyurethane foam becomes non-uniform due to the change in the discharge speed or the discharge direction, and the thickness or density of the molded product molded by using the polyurethane foam becomes non-uniform.
- a nozzle cleaning device for example, there is a nozzle cleaning device disclosed in Patent Document 1.
- the nozzle cleaning device disclosed in Patent Document 1 includes an air nozzle for injecting gas, and blows the gas injected from the air nozzle from below the nozzle to be cleaned through the notch of the nozzle to be cleaned. By spraying the gas to the nozzle for cleaning through the notch, the polyurethane foam adhering to the inside of the nozzle to be cleaned is removed from the nozzle and falls through the notch.
- Patent Document 1 removes polyurethane foam adhering to the inside of the nozzle by injecting a gas.
- a gas it is not possible to remove all the polyurethane foam adhering to the inside of the nozzle only by injecting gas.
- the gas is sprayed mainly toward the inside of the nozzle through the notch, it is difficult to remove the polyurethane foam adhering to the outer periphery of the nozzle.
- the present disclosure has been made to solve the above-mentioned problems, and is a nozzle cleaning device, a heat insulating material manufacturing device, a nozzle cleaning method, which can easily remove the deposits adhering to the nozzle from the nozzle. And to provide a method of manufacturing a heat insulating material.
- the nozzle cleaning device is a nozzle cleaning device that cleans a nozzle that discharges polyurethane foam, and softens the polyurethane foam adhering to the nozzle with a solvent.
- the nozzle is moved between a gas injection unit having a softening unit and an injection nozzle for injecting gas and ejecting gas from the injection nozzle to remove the softened polyurethane foam, and a softening unit and a gas injection unit. It is equipped with a moving part.
- the nozzle cleaning device, the heat insulating material manufacturing device, the nozzle cleaning method, and the heat insulating material which can easily remove the deposits adhering to the nozzle by providing the softening part and the gas injection part.
- a manufacturing method can be provided.
- FIG. 6A The figure which shows the whole structure of the nozzle cleaning apparatus which concerns on embodiment of this disclosure.
- Side view of the softened part and the gas injection part connected The figure which shows the procedure which softens the rigid polyurethane foam of the tip of a nozzle by a solvent.
- Top view showing the main part of the injection nozzle Side view showing the main part of the injection nozzle
- the main part of the injection nozzle is shown and viewed from the direction of arrow X in FIG. 6A.
- the vertical direction when the nozzle cleaning device is installed on the floor is defined as the vertical direction in the figure
- the direction in which the arm turns is defined as the horizontal direction in the figure
- the direction in which the arm faces the mold It is defined as the front-back direction.
- this direction will be quoted and explained.
- the nozzle cleaning device is a device for cleaning the nozzle of a mixing head that produces polyurethane foam.
- Polyurethane foam is a plastic foam with a cell structure that has air bubbles inside.
- Polyurethane foam includes flexible polyurethane foam and rigid polyurethane foam.
- the flexible polyurethane foam has an open cell structure in which air bubbles communicate with each other, and is used for cushions, mattresses, etc. for automobile seats where elasticity is required.
- Rigid polyurethane foam has a closed cell structure in which bubbles are independent of each other, and is used as a heat insulating material for buildings, a heat insulating material for electric appliances, etc., which require strength and heat insulating properties.
- Rigid polyurethane foam is produced by a chemical reaction between a polyol component and an isocyanate component, has a high viscosity, and has a high adhesive strength.
- a polyol component having a viscosity of 100-10,000 mPa ⁇ s and an isocyanate component having a viscosity of 50-5,000 mPa ⁇ s are mixed to produce a rigid polyurethane foam.
- the high-viscosity rigid polyurethane foam is discharged from the nozzle, a part of the rigid polyurethane foam adheres to the tip of the nozzle and is resinified as it is. In order to continue using the nozzle, it is necessary to clean the tip of the nozzle with a nozzle cleaning device.
- FIG. 1 is a conceptual diagram of the nozzle cleaning device, and is a view of the nozzle cleaning device as viewed from above.
- the nozzle cleaning device 1 includes a softening unit 100, a gas injection unit 200, a wiping unit 300, and a moving unit 400.
- the nozzle cleaning device 1 is arranged adjacent to the mold 500 into which the rigid polyurethane foam is injected.
- Each member constituting the nozzle cleaning device 1 is arranged in the order of the softening unit 100, the gas injection unit 200, and the wiping unit 300 in the clockwise direction when viewed from above.
- the arrangement order may be counterclockwise.
- the moving unit 400 is a device that moves the mixing head 10 including the nozzle 13 in the order of the mold 500, the softening unit 100, the gas injection unit 200, and the wiping unit 300. The structure of the mixing head 10 will be described later.
- the operation control of the softening unit 100, the gas injection unit 200, the wiping unit 300, and the moving unit 400 is executed by the control unit 600.
- the control unit 600 includes a CPU (Central Processing Unit) 601 and a RAM (Random Access Memory) 602, a ROM (Read Only Memory) 603, an operation unit 604, and a display 605.
- CPU Central Processing Unit
- RAM Random Access Memory
- ROM Read Only Memory
- FIG. 2 is a side view of the moving portion 400 and the mold 500
- FIG. 3 is a top view.
- the moving unit 400 is a robot provided with an arm.
- the moving portion 400 includes a base 401, an arm portion 402 installed on the upper surface of the base 401, and a connecting portion 403 that connects the tip of the arm portion 402 and the mixing head 10.
- the mold 500 is arranged in front of the moving portion 400.
- the arm portion 402 includes a first arm 402a, a second arm 402b, a third arm 402c, a fourth arm 402d, and a fifth arm 402e.
- the first arm 402a is an arm extending upward from the base 401, and is swiveled in the direction indicated by the arrow 404 about the swivel center Y shown in FIG. 3 by a driving means (not shown).
- the second arm 402b is attached to the tip of the first arm 402a
- the third arm 402c is attached to the tip of the second arm 402b
- the fourth arm 402d is attached to the tip of the third arm 402c
- the fifth arm 402b is attached.
- the arm 402e is attached to the tip of the fourth arm 402d.
- Each arm is connected by a rotation axis parallel to the base 401 and extending in a direction orthogonal to the front-rear direction of the moving portion 400.
- a rotation axis When each rotation axis is rotated by a drive means (not shown), the tip of the arm portion 402, specifically, the tip of the fifth arm 402e moves up and down and back and forth as shown by arrows 405 and 406. Due to the rotation of each rotation axis and the rotation of the first arm 402a, the tip of the arm portion 402, specifically, the tip of the fifth arm 402e moves up, down, left, right, front and back.
- the connecting portion 403 is a member that connects the mixing head 10 to the moving portion 400, and is attached to the tip of the arm portion 402, specifically, the tip of the fifth arm 402e.
- the connecting portion 403 is specifically a bracket, and the side cross-sectional shape is formed in a stepped shape. Since the mixing head 10 is attached to the tip of the fifth arm 402e by a bracket having a stepped side cross-sectional shape, the mixing head 10 is arranged so as to project forward from the tip of the fifth arm 402e.
- FIGS. 4A and 4B show the softening unit 100 and the gas injection unit 200 of the nozzle cleaning device 1.
- the softening unit 100 and the gas injection unit 200 are connected
- FIG. 4A is a top view of the connected softening unit 100 and the gas injection unit 200
- FIG. 4B is a cross section cut along the XX'cutting line of FIG. 4A. It is a figure. The cross section is not hatched.
- the softening unit 100 and the gas injection unit 200 are connected by sharing a part of the injection frame 202 of the gas injection unit 200, which will be described later.
- the softening portion 100 of the nozzle cleaning device 1 is composed of a solvent container 102 containing the solvent 101, a solvent stand 103 on which the solvent container 102 is placed, and a nozzle 13 immersed in the solvent 101.
- a solvent return unit 104 for returning the dropped solvent 101 to the solvent container 102 is provided.
- the solvent 101 for example, a non-phthalic acid-based plasticizer is used.
- the rigid polyurethane foam that adheres to the tip of the nozzle 13 and is resinified is softened by being immersed in the solvent 101.
- the rigid polyurethane foam 13a attached to the tip of the nozzle 13 is softened by the procedure shown in FIG. As shown in the left figure of FIG. 5, the nozzle 13 of the mixing head 10 is moved to the upper part of the solvent container 102 by the moving portion 400, and then lowered as shown by the arrow 105, in the center of FIG. As shown in the figure, it is immersed in the solvent 101.
- the nozzle 13 is immersed in the solvent 101 from the tip of the nozzle 13 to a position of about 20% of the length of the nozzle 13.
- the immersion time needs to be such that the rigid polyurethane foam 13a adhering to the tip of the nozzle 13 is too softened and does not separate from the nozzle 13.
- the immersion time is set to 5 seconds or less as the time for keeping the rigid polyurethane foam 13a from coming off.
- the solvent pedestal 103 is a pedestal on which the solvent container 102 containing the solvent 101 is placed, and is connected to the injection pedestal 202 of the gas injection unit 200 described later.
- the solvent return unit 104 is arranged above the solvent container 102 and includes an inclined plate 104a.
- the lower end of the inclined plate 104a is arranged in contact with the upper end of the solvent container 102.
- the inclined plate 104a is installed for the purpose of reducing the amount of the solvent used by reusing the solvent.
- the tilt angle is 15 to 85 degrees.
- the gas injection unit 200 of the nozzle cleaning device 1 includes a base 201, an injection base 202 installed on the base 201, and an injection nozzle mounted on the upper part of the injection base 202.
- the 203 and the receiving portion 204 attached to the lower part of the injection stand 202 are provided.
- the injection nozzle 203 is formed in a horn shape in which the width gradually increases toward the injection port 205 at the tip portion when viewed from above.
- the injection nozzle 203 has a shape in which the cross-sectional area becomes smaller toward the injection port 205 at the tip portion in order to increase the ejection pressure. Further, as shown in FIG.
- the injection port 205 since the cross-sectional area of the end portion of the horn shape on the injection port 205 side is reduced, the injection port 205 has a flat shape, that is, a constant length when FIG. 6A is viewed from the X direction. It has a long, thin shape with a horn. Therefore, the gas injected from the injection port 205 is sprayed to a wide area of the mixing head 10 at a high speed.
- the injection pedestal 202 is a frame to which the injection nozzle 203 and the receiving portion 204 are attached, and in the present embodiment, it is formed by combining plate-shaped members.
- the outer shape of the injection pedestal 202 is formed into a square columnar shape, and the upper portion thereof is formed in a tubular shape so that the nozzle 13 of the mixing head 10 to be cleaned can be inserted from the upper portion.
- the injection nozzle 203 includes three nozzle units 203a, 203b, and 203c.
- the nozzle units 203a, 203b, 203c are attached to the injection pedestal 202 with the injection port facing the inside of the injection pedestal 202.
- the nozzle units 203a, 203b, and 203c are attached at intervals of 120 degrees in a top view.
- the nozzle 13 is inserted into the area surrounded by the nozzle units 203a, 203b, 203c.
- the region in which the nozzle 13 is inserted and the gas is injected from the injection nozzle 203 is hereinafter referred to as an “injection region”.
- the nozzle units 203a, 203b, and 203c remove the rigid polyurethane foam adhering to the nozzle 13 by injecting gas into the nozzle 13 inserted in the injection region.
- the injection nozzle 203 is attached to the injection stand 202 with the injection port at the tip inclined downward.
- the tilt angle ⁇ of the injection nozzle 203 can be set in the range of 0 degrees to 90 degrees.
- the inclination angle ⁇ of this embodiment is 30 degrees. Air, argon, nitrogen or the like is used as the gas injected from the injection nozzle 203.
- the receiving portion 204 is a container that receives the rigid polyurethane foam that has fallen from the tip of the nozzle 13.
- the receiving portion 204 is formed in a box shape, and rigid polyurethane foam is accumulated in the box. Once a certain amount of rigid polyurethane foam has accumulated in the receiving portion 204, the accumulated rigid polyurethane foam is manually or automatically discarded.
- the mixing head 10 When injecting gas into the nozzle 13 of the mixing head 10 using the injection nozzle 203, first, the mixing head 10 is lowered by the moving unit 400 to move the nozzle 13 to the injection region. At this time, the tip of the nozzle 13 of the mixing head 10 is lowered to a position below the tip of the injection nozzle 203 (hereinafter, referred to as "initial position" or “first position”). The tip of the nozzle 13 is moved from the first position to the second position above the first position. The second position is below the position of the tip of the injection nozzle 203.
- the gas is injected from the injection nozzle 203, and the gas is continuously injected until the nozzle 13 rises to the second position.
- the rigid polyurethane foam adhering to the tip of the nozzle 13 is blown off by the injected gas.
- the blown-off rigid polyurethane foam falls downward due to its own weight and is received by the receiving portion 204.
- the tip of the nozzle 13 of the mixing head 10 is located below the tip of the injection nozzle 203 while the gas is being injected from the injection nozzle 203, the rigid polyurethane foam dropped from the nozzle 13 is injected. It does not adhere to the nozzle 203.
- Each nozzle unit 203a, 203b, 203c is attached to the injection stand 202 at an inclination angle of 30 degrees. Therefore, the rigid polyurethane foam blown off by the gas ejected from any one nozzle unit does not adhere to the other nozzle unit. Further, at the same time that the nozzle 13 moves upward from the first position, gas is injected from the injection nozzle 203 to the nozzle 13, and the gas injection is continued while the nozzle 13 is raised to the second position. .. Therefore, not only the tip of the nozzle 13 but also the rigid polyurethane foam adhering to the side surface can be blown off. When a plurality of injection nozzles 203 are installed, the height of each injection nozzle 203 can be made the same so that the rigid urethane foam removed by the injection nozzle 203 can be prevented from adhering to the other injection nozzles 203.
- the wiping portion 300 of the nozzle cleaning device 1 is shown in FIG.
- the wiping unit 300 is a device that wipes the tip of the nozzle 13 from which the rigid polyurethane foam has been removed by the gas injection unit 200.
- the solvent 101 that adheres when immersed in the solvent 101 remains.
- the solvent 101 remains, when the rigid polyurethane foam is discharged, the remaining solvent 101 and the first liquid and the second liquid cause a chemical reaction, which affects the characteristics of the discharged rigid polyurethane foam. Therefore, the solvent 101 needs to be removed from the nozzle 13 before the rigid polyurethane foam is injected into the mold.
- urethane remains in the wiping unit 300, but in the present embodiment, urethane is removed by passing through the gas injection unit 200. Residual can be suppressed.
- the wiping unit 300 includes a wiping table 301 and a rotating shaft 302 for rotating the wiping table 301.
- the wiping table 301 is a member that wipes off the solvent adhering to the tip of the nozzle 13.
- the wiping table 301 is formed in a disk shape, is arranged with one surface of the disk facing upward, and the rotation shaft 302 is fixed to the lower surface.
- the disk-shaped wiping table 301 rotates when the rotating shaft 302 is rotated by a driving means (not shown).
- a cloth for wiping off the solvent is attached to the upper surface of the wiping table 301.
- the cloth may be a material that absorbs the solvent adhering to the nozzle 13 and does not damage the tip of the nozzle 13, and for example, a knitted cloth is used.
- the wiping table 301 is rotated only in a fixed direction and not in the direction opposite to the fixed direction. This is because if the solvent is rotated in the opposite direction, the solvent wiped by the wiping table 301 may adhere to the tip of the nozzle 13 again.
- the rotating shaft 302 of the wiping table 301 is perpendicular to the nozzle 13, the contact area between the nozzle 13 and the cloth installed on the wiping table 301 is small, and urethane remains in the portion where the contact cannot be made.
- the rotating shaft 302 since the rotating shaft 302 is provided in parallel with the nozzle 13, the contact area with the nozzle 13 can be increased and the urethane residue can be suppressed.
- the mixing head 10 When performing the wiping operation, the mixing head 10 is moved from the gas injection unit 200 to above the wiping unit 300 by the moving unit 400.
- the mixing head 10 moved to the upper part of the wiping portion 300 is lowered by the moving portion 400 as shown by an arrow 303 until the tip of the nozzle 13 comes into contact with the upper surface of the wiping table 301.
- the wiping table 301 is rotated in a certain direction by the rotation shaft 302 as shown by the arrow 304.
- the mixing head 10 moves on the wiping table 301 so that the portion wiped once on the upper surface of the wiping table 301 does not come into contact with the tip of the nozzle 13.
- a pattern of moving the wiping table 301 in the tangential direction of the circle, a pattern of moving the wiping table 301 from the rotation center toward the outer circumference, and a pattern of moving the wiping table 301 from the outer circumference toward the rotation center is.
- the pattern of moving the wiping table 301 in the tangential direction of the circle is a pattern of moving the mixing head 10 in the tangential direction of the circle of the disk-shaped wiping table 301.
- the mixing head 10 moves linearly on the wiping table 301 in the tangential direction, the tip of the nozzle 13 is wiped off by the cloth of the wiping table 301. Since the mixing head 10 moves linearly in the tangential direction of the wiping table 301, the tip of the nozzle 13 does not come into contact with the same area of the wiping table 301. Therefore, the solvent wiped by the wiping table 301 does not adhere to the tip of the nozzle 13 again.
- the pattern that moves from the center of rotation of the wiping table 301 toward the outer circumference is a pattern that moves the mixing head 10 outward from the center of rotation of the wiping table 301 in the radial direction of the disk-shaped wiping table 301.
- the mixing head 10 moves outward in the radial direction by the width of the ejection port of the nozzle 13 each time the wiping table 301 makes one rotation.
- the tip of the nozzle 13 is wiped off by the cloth of the wiping table 301 by rotating the wiping table 301. If the wiping of the tip of the nozzle 13 is completed in the middle of one rotation of the wiping table 301, the next wiping operation is started from the place where the previous wiping is completed.
- the control unit 600 notifies the operator and prompts the operator to replace the cloth attached to the upper surface of the wiping table 301.
- the pattern of moving the wiping table 301 from the outer circumference toward the center of rotation is a pattern of moving the mixing head 10 in the opposite direction of the pattern of moving from the center of rotation of the wiping table 301 toward the outer circumference. Similar to the pattern of moving from the center of rotation to the outer circumference, the mixing head 10 is moved inward in the radial direction each time the wiping table 301 makes one rotation. In this case as well, the tip of the nozzle 13 is not wiped again at the portion where the solvent has already been wiped off.
- the time for wiping the tip of the nozzle 13 with the wiping table 301 is set in advance, and after the set time has elapsed, the mixing head 10 is raised by the moving portion 400 as shown by the arrow 305, and the next mold is used. Wait until the injection operation.
- the softening unit 100, the gas injection unit 200, and the wiping unit 300 by shortening the moving distance of the arm unit 402 of the moving unit 400 as much as possible.
- the height at which the injection nozzle 203 is attached and the height of the upper surface of the mold 500 are the same.
- the nozzle cleaning method includes a softening step for softening the rigid polyurethane foam adhering to the nozzle 13, a gas injection step for injecting gas toward the nozzle 13, and a wiping step for wiping the tip of the nozzle 13.
- the mixing head 10 moves between the standby position (1), the mold injection position (2), the softening position (3), the gas injection position (4), and the wiping position (5). It is moved by the unit 400.
- the arrow in FIG. 1 indicates the movement locus of the mixing head 10.
- FIG. 9 is a flowchart showing the flow of cleaning, and the operation processing in each step is controlled by the control unit 600.
- the control unit 600 raises the mixing head 10 from the mold 500 by the moving unit 400, moves it to the softening position (3) where the softening unit 100 shown in FIG. 1 is located, stops it, and starts the softening step (step S101). ..
- the mixing head 10 moved onto the softening portion 100 is lowered by the moving portion 400, and the tip of the nozzle 13 is immersed in the solvent 101 for 5 seconds.
- the rigid polyurethane foam attached to the tip of the nozzle 13 is softened by being immersed in the solvent 101 for 5 seconds.
- the mixing head 10 is raised by the moving portion 400 and moved above the gas injection portion 200 as shown in FIG. 10C, and the softening step is performed. finish.
- the solvent 101 adhering to the tip of the nozzle 13 falls on the inclined plate 104a of the solvent returning unit 104 and is inclined. It descends along the slope of the plate 104a and returns to the inside of the solvent container 102.
- the control unit 600 moves the mixing head 10 to the gas injection position (4) where the gas injection unit 200 shown in FIG. 1 is located, and the gas injection step starts (step S102). As shown in FIG. 10 (c), the mixing head 10 is stopped above the gas injection unit 200, then lowered by the moving unit 400 as shown by the arrow, and as shown in FIG. 10 (d). , It is stopped at the initial position (first position) in the injection region of the injection pedestal 202.
- the mixing head 10 at the initial position of the injection pedestal 202 is raised to the second position at a low speed by the moving portion 400, and gas is discharged from the injection nozzle 203 to the nozzle 13. It is sprayed toward.
- the timing at which the gas is injected from the injection nozzle 203 is set by the control unit 600 when the mixing head 10 starts to rise from the initial position.
- the gas injection is continued while the nozzle 13 moves from the first position to the second position.
- the injected gas blows off the hard polyurethane foam that has adhered to the nozzle 13 and has been softened.
- the blown-off rigid polyurethane foam falls due to its own weight and is accommodated in the receiving portion 204, and the gas injection step is completed.
- the control unit 600 moves the mixing head 10 to the wiping position (5) shown in FIG. 1 by the moving unit 400, and the wiping step starts (step S103).
- the mixing head 10 moved to the wiping position (5) is lowered by the moving portion 400 to a position where the tip of the nozzle 13 comes into contact with the upper surface (wiping surface) of the wiping table 301.
- the wiping table 301 is rotated in a certain direction, and the tip of the nozzle 13 is moved on the upper surface of the wiping table 301 while being in contact with the wiping table 301.
- the tip of the nozzle 13 comes into contact with the wiping surface of the wiping table 301, the solvent 101 adhering to the tip of the nozzle 13 is wiped off, and the wiping step is completed.
- the mixing head 10 that has been wiped returns to the standby position (1), and cleaning is completed.
- the mixing head 10 stands by in the standby position (1) until the process of injecting the rigid polyurethane foam into the next mold starts. After the injection of the rigid polyurethane foam into the next mold is started and the injection work is completed, the cleaning method is started again. This operation is repeated until the injection work of all the rigid polyletan foams is completed.
- the injection nozzle 203 of the gas injection unit 200 is formed by three nozzle units 203a-203c, but the number of nozzle units is not limited to three.
- the nozzle unit shown in FIG. 11A-11C may be used.
- 11A-11C shows a top view of the gas injection unit 200 on the upper side, and a cross section of the upper side view cut by a cutting line of the AA'line, the BB' line, or the CC'line below. The figure is shown. No hatching is applied to the cross section. In the figure, the arrow extending upward indicates the direction of the ascending movement of the mixing head 10.
- FIG. 11A shows an example of an injection nozzle 203 including four nozzle units.
- the four nozzle units include a pair of nozzle units 213a and 213c that are attached to the injection stand 202 facing each other, and a pair of nozzle units 213b and 213d that face each other adjacent to the pair of nozzle units 213a and 213c.
- the nozzle units 213a, 213b, 213c, and 213d are attached to the injection stand 202 with an inclination angle of 30 degrees, respectively.
- the injection ports of the pair of nozzle units 213a and 213c and the injection ports of the pair of nozzle units 213b and 213d face each other, so that the rigid polyurethane foam separated from one nozzle unit faces each other. Although it may adhere to the other nozzle unit, such an inconvenience does not occur because the inclination angle is 30 degrees.
- FIG. 11B shows an example of an injection nozzle 203 including two nozzle units.
- the two nozzle units include a pair of nozzle units 223a and 223b mounted on the injection pedestal 202 facing each other. Costs can be reduced by reducing the number of nozzle units.
- the inclination angle of the nozzle units 223a and 223b is set to 30 degrees, so that even if the pair of nozzle units 223a and 223b are arranged to face each other, they are placed on each other.
- the rigid polyurethane foam does not adhere to the nozzle units 223a and 223b.
- FIG. 11C shows an example of an injection nozzle 233 including one nozzle unit.
- One nozzle unit 233 is attached to any side of the injection pedestal 202.
- the tilt angle of the nozzle unit 233 can be set in the range of 0 degrees to 90 degrees.
- the inclination angle of the injection nozzle 203 of the gas injection unit 200 can be set in the range of 0 degrees to 90 degrees.
- the rigid polyurethane foam separated from one of the facing nozzle units may adhere to the other nozzle unit. Therefore, when mounting a nozzle unit having an inclination angle of 0 degrees, it is necessary to arrange the rigid polyurethane foam separated from the nozzle unit so that it does not adhere to other nozzle units.
- FIGS. 12A and 12B show a modified example of the arrangement of the nozzle unit when the inclination angle of the nozzle unit is set to 0 degree.
- 12A and 12B show a top view of the gas injection unit 200 on the upper side, and a cross-sectional view of the top view cut along the cut line of the D-D'line or the E-E'line below.
- the arrow extending upward indicates the direction of the ascending movement of the mixing head 10.
- the nozzle unit shown in FIG. 12A includes three nozzle units 243a, 243b, and 243c.
- the nozzle units 243a, 243b, and 243c are arranged at an angle of 120 degrees when viewed from above. Since the injection ports of each nozzle unit are arranged so as not to face each other, the rigid polyurethane foam separated from any one nozzle unit does not adhere to the other nozzle unit.
- the nozzle unit shown in FIG. 12B includes one nozzle unit 253. There is only one nozzle unit 253, and the rigid polyurethane foam separated from the nozzle unit 253 quickly falls to the receiving portion 204 without adhering to the nozzle unit 253 again.
- the nozzle unit shown in FIGS. 12A and 12B has an inclination angle of 0 degrees, and injects gas with respect to the nozzle 13 of the mixing head 10 at an angle of 90 degrees in the extending direction of the nozzle 13. Since the gas is blown to the nozzle 13 at an angle of 90 degrees, the blowing force can be increased as compared with the case where the inclination angle is 30 degrees, and the rigid polyurethane foam adhering to the nozzle 13 can be reliably removed.
- the heat insulating material manufacturing apparatus 700 includes a mixing head 10, a mold 500, a softening unit 100, a gas injection unit 200, a wiping unit 300, and a moving unit 400.
- the softening unit 100, the gas injection unit 200, the wiping unit 300, and the moving unit 400 constitute the nozzle cleaning device 1. Detailed description of each element of the nozzle cleaning device 1 will be omitted.
- the mixing head 10 is a device that mixes two types of liquids and discharges them from the nozzle 13.
- the mixing head 10 includes a main body portion 11, a mixing portion 12 formed inside the main body portion 11 and in which two types of liquids are mixed, and a nozzle 13 for discharging the liquid mixed in the mixing portion 12.
- the mixing head 10 is connected to the first tank 14 for storing the first liquid via a pipe, and the first measuring pump 15 is arranged between the first tank 14 and the mixing head 10. Further, the mixing head 10 is connected to the second tank 16 for storing the second liquid via a pipe, and the second measuring pump 17 is arranged between the mixing head 10 and the second tank 16.
- the first tank 14 is a tank for storing a first liquid containing a polyol component as a main component
- the second tank 16 is a tank for storing a second liquid containing an isocyanate component as a main component.
- the first liquid and the second liquid include a foaming agent, a catalyst, a foam regulating agent, a flame retardant and the like which are auxiliary agents.
- the first measuring pump 15 is a pump that weighs the first liquid stored in the first tank 14 and sends the liquid to the mixing head 10
- the second measuring pump 17 is a second measuring pump 17 stored in the second tank 16. It is a pump that measures the liquid and sends it to the mixing head 10.
- the first measuring pump 15 and the second measuring pump 17 are positive displacement pumps, and a diaphragm pump, a plunger pump, or the like is used.
- the mixing portion 12 is a chamber formed inside the main body portion 11.
- the first liquid containing the polyol component sent from the first measuring pump 15 as the main component and the second liquid containing the isocyanate component sent by the second measuring pump 17 as the main component are separated from each other. It is mixed under high pressure.
- the nozzle 13 is a member that discharges the rigid polyurethane foam produced by mixing the first liquid and the second liquid in the mixing unit 12.
- the mold 500 is a mold manufactured mainly using a metal material for molding and processing using a rigid polyurethane foam to obtain a heat insulating material, and a molded product is obtained by injection molding. As shown in FIGS. 2 and 3, the mold 500 includes a main body 501 and a recess 502 having an internal shape for molding the outer shape of the molded product. An opening 503 for injecting rigid polyurethane foam is formed on the upper surface of the mold 500.
- the moving unit 400 moves the mixing head 10 between the mold 500 and the nozzle cleaning device 1, and repeats the production of the heat insulating material and the cleaning of the nozzle 13.
- the method for manufacturing a heat insulating material using the heat insulating material manufacturing apparatus 700 includes a urethane foam forming step, a mold injection step, a softening step, a gas injection step, and a wiping step.
- the softening step, the gas injection step, and the wiping step are steps of the cleaning method, and detailed description thereof will be omitted.
- FIG. 14 is a flowchart showing the flow of the method for manufacturing the heat insulating material.
- the operation processing of each step is controlled by the control unit 600.
- the control unit 600 moves the mixing head 10 from the standby position (1) to the mold injection position (2) above the mold 500 by the moving unit 400.
- the mixing head 10 is lowered to the opening 503 of the mold 500 by the moving portion 400, stopped, and the urethane foam generation step is started (step S201).
- the first liquid stored in the first tank 14 is sucked out from the first tank 14 by driving the first measuring pump 15, and the amount required by the first measuring pump 15 is weighed and mixed.
- the liquid is sent to the head 10.
- the second liquid stored in the second tank 16 is sucked out from the second tank 16 by driving the second measuring pump 17, and the amount required by the second measuring pump 17 is weighed.
- the liquid is sent to the mixing head 10.
- the first liquid and the second liquid sent to the mixing head 10 collide with each other at a high pressure in the mixing unit 12 and are mixed. Then, the polyol component of the first liquid and the isocyanate component of the second liquid mixed in the mixing unit 12 cause a chemical reaction to foam and resin to form a rigid polyurethane foam.
- the generated rigid polyurethane foam is discharged from the tip of the nozzle 13, and the mold injection step starts (step S202).
- the discharged rigid polyurethane foam is injected into the mold 500 from the tip of the nozzle 13 through the opening 503 of the mold 500.
- the first liquid and the second liquid returned from the mixing unit 12 return to the first tank 14 and the second tank 16, respectively.
- the arm portion 402 shown in FIG. 2 swivels and rotates.
- the mixing head 10 fixed to the tip of the fifth arm 402e moves up, down, left, right, front and back due to the turning movement and the rotational movement of the arm portion 402.
- the rigid polyurethane foam discharged from the nozzle 13 to the opening 503 of the mold 500 is injected into every corner of the mold 500.
- the injection position of the nozzle 13 in the longitudinal direction of the mold 500 is changed by the swivel movement of the arm portion 402, and the injection position of the nozzle 13 in the lateral direction of the mold 500 is changed by the front-back movement of the arm portion 402.
- the rigid polyurethane foam injected into the mold 500 is cooled for a certain period of time and die-cut to form a molded product.
- control unit 600 raises the mixing head 10 from the mold 500 by the moving unit 400, moves it to the softening position (3) where the softening unit 100 shown in FIG. 1 is located, stops it, and starts the softening step (the softening step starts. Step S203).
- the rigid polyurethane foam to which the nozzle 13 is attached is softened.
- control unit 600 moves the mixing head 10 by the moving unit 400 to the gas injection position (4) where the gas injection unit 200 shown in FIG. 1 is located, and the gas injection step starts (step S204).
- the gas is sprayed toward the nozzle 13, the rigid polyurethane foam adhering to the tip of the nozzle 13 is blown off and removed.
- control unit 600 moves the mixing head 10 to the wiping position (5) shown in FIG. 1 by the moving unit 400, and the wiping step starts (step S205).
- the tip of the nozzle 13 comes into contact with the wiping surface of the wiping table 301, the solvent 101 adhering to the tip of the nozzle 13 is wiped off, and the wiping step is completed.
- step S206 determines whether or not it is necessary to mold the next molded product (step S206), and if it is necessary to mold the next molded product of the polyurethane foam (step S206; YES), the step.
- step S206 determines whether or not it is necessary to mold the next molded product (step S206), and if it is necessary to mold the next molded product of the polyurethane foam (step S206; YES), the step.
- step S206 determines whether or not it is necessary to mold the next molded product (step S206), and if it is necessary to mold the next molded product of the polyurethane foam (step S206; YES), the step.
- step S206 determines whether or not it is necessary to mold the next molded product (step S206), and if it is necessary to mold the next molded product of the polyurethane foam (step S206; YES), the step.
- step S206 determines whether or not it is necessary to mold the next molded product (step S206), and if
- step S206 When it is not necessary to mold the next molded product (step S206; NO), the process is completed and the product stands by in the standby position until the next instruction is given by the user.
- the nozzle cleaning device 1 includes a softening unit 100 and a gas injection unit 200, the rigid polyurethane foam adhering to the nozzle 13 can be softened and then removed by gas, and the rigid polyurethane foam can be reliably removed. can do.
- the softening portion 100 in the present embodiment immerses the tip portion of the nozzle 13 in the solvent 101, the rigid polyurethane foam adhering to both the inside and the outer periphery of the nozzle 13 can be softened. Therefore, the rigid polyurethane foam adhering to both the inside and the outer periphery of the nozzle 13 can be easily removed in the gas injection step of the next step.
- the tip of the injection nozzle 203 of the gas injection unit 200 in the present embodiment is arranged at the first position above the tip of the nozzle 13, the rigid polyurethane foam separated from the nozzle 13 adheres to the injection nozzle 203. There is no. If the rigid polyurethane foam does not adhere to the injection nozzle 203, it is not necessary to separately provide a device for cleaning the injection nozzle 203.
- the present embodiment includes the wiping portion 300, the solvent 101 adhering to the tip of the nozzle 13 can be wiped off, and then the solvent 101 does not get mixed in the rigid polyurethane foam ejected from the nozzle 13. Thereby, the quality of the product molded by the rigid polyurethane foam can be maintained.
- the nozzle cleaning device 1 of the present embodiment is effective for cleaning a nozzle that discharges a highly viscous rigid polyurethane foam.
- the heat insulating material manufacturing apparatus 700 of the present embodiment includes the nozzle cleaning device 1, the urethane foam is discharged from the nozzle 13 and the nozzle 13 is repeatedly cleaned to continuously manufacture the heat insulating material. It can be carried out.
- the nozzle cleaning device 1 includes a softening unit 100, a gas injection unit 200, and a wiping unit 300. However, if the solvent 101 is blown off by the gas injection unit 200, the nozzle cleaning device 1 is wiped off.
- the unit 300 does not have to be provided.
- the mixing head 10 is moved in the order of the softening unit 100, the gas injection unit 200, and the wiping unit 300, but the mixing head 10 may be moved in the reverse direction on the way.
- the gas injection portion 200 may remove a part of the rigid polyurethane foam and then immerse it in the solvent 101 again.
- the rigid polyurethane foam adhering to the nozzle 13 is immersed in a solvent to soften it, but even if the solvent is sprayed from around the nozzle 13 for a certain period of time to soften the rigid polyurethane foam. good.
- the injection pedestal 202 has a cylindrical shape of a quadrangular prism, but the shape of the injection pedestal 202 is not limited to this shape. Any shape may be used as long as the mixing head 10 can be inserted inside and the injection nozzle can be attached.
- the rigid polyurethane foam is not separated from the nozzle 13 by shortening the time of immersion in the solvent 101.
- a surveillance camera may be installed to detect that the rigid polyurethane foam is floating on the liquid surface of the solvent 101 in case the immersion time is set to be long or the softening is performed earlier than expected.
- a device for automatically removing the rigid polyurethane foam may be separately provided.
- the heat insulating material manufacturing apparatus and manufacturing method have been described, but the present invention is not limited to manufacturing the heat insulating material, and is applicable to any molded product that can be molded using the mold 500. can do.
- the disk-shaped wiping table 301 is used, but the shape of the wiping table 301 is not limited to the disk shape.
- a cloth may be attached to the outer peripheral surface of the cylindrical wiping table and rotated about the central axis of the cylinder.
- the nozzle cleaning device 1 has been described as removing the rigid polyurethane foam from the nozzle 13, but it can also be used for removing other deposits such as flexible polyurethane foam and semi-rigid polyurethane foam.
- the injection nozzle 203 is fixed to the injection stand 202 and the nozzle 13 rises.
- the injection nozzle 203 and the nozzle 13 may move relative to each other, and the injection nozzle 203 moves in the vertical direction. May be good.
- the gas injection unit 200 has been described using the mixing head 10 with the tip of the nozzle 13 facing downward, the gas injection unit 200 may be directed in any direction by the arm unit 402.
- the present disclosure can be suitably used for a nozzle cleaning device for cleaning a nozzle that blows out polyurethane foam.
- Nozzle cleaning device 10 Mixing head, 11 Main body, 12 Mixing part, 13 Nozzle, 13a Rigid polyurethane foam, 14 1st tank, 15 1st measuring pump, 16 2nd tank, 17 2nd measuring pump, 100 Softening part , 101 solvent, 102 solvent container, 103 solvent stand, 104 solvent return part, 104a inclined plate, 105, 106 arrow, 200 gas injection part, 201 base, 202 injection stand, 203 injection nozzle, 204 receiving part, 205 injection port.
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Abstract
Description
以下、本開示の実施の形態に係るノズル清掃装置について、図面を参照して詳細に説明する。なお、ノズル清掃装置を床面に設置した場合の上下方向を、図の上下方向と規定し、アーム部が旋回する方向を、図の左右方向と規定し、アーム部が金型に向かう方向を前後方向と規定する。以下、この方向を引用して説明する。
本実施の形態に係るノズル清掃装置の構造について説明する。図1は、ノズル清掃装置の概念図であり、ノズル清掃装置を上方から見た図である。図1に示すように、ノズル清掃装置1は、軟化部100と、気体噴射部200と、拭取部300と、移動部400と、を備える。ノズル清掃装置1は、硬質ポリウレタンフォームが注入される金型500に隣接して配置される。
次に、ノズル清掃装置1を使用したノズル清掃方法について、図1、図9を参照して説明する。ノズル清掃方法は、ノズル13に付着した硬質ポリウレタンフォームを軟化させる軟化ステップと、ノズル13に向けて気体を噴射させる気体噴射ステップと、ノズル13の先端を拭き取る拭取りステップと、を備える。ミキシングヘッド10は、図1に示すように、待機ポジション(1)、金型注入ポジション(2)、軟化ポジション(3)、気体噴射ポジション(4)、拭取ポジション(5)の間を、移動部400により移動される。図1の矢印は、ミキシングヘッド10の移動軌跡を示す。
本実施の形態では、気体噴射部200の噴射ノズル203は、3つのノズルユニット203a-203cで形成されていたが、ノズルユニットの数は、3つに限定されない。例えば、図11A-11Cに示すノズルユニットを使用してもよい。図11A-11Cは、各々、上に気体噴射部200の上面図を示し、下に上面図をA-A’線、B-B’線、又はC-C’線の切断線で切断した断面図を示す。断面図には、ハッチングは施していない。図中、上方向に伸びる矢印は、ミキシングヘッド10の上昇移動の方向を示す。
実施の形態では、気体噴射部200の噴射ノズル203の傾斜角度は、0度から90度の範囲で設定が可能であると説明した。しかし、傾斜角度が0度の場合に、ノズルユニットを対向して配置した場合には、対向する一方のノズルユニットから離脱した硬質ポリウレタンフォームが他のノズルユニットに付着する恐れがある。したがって、傾斜角度を0度としたノズルユニットを取り付ける場合には、ノズルユニットから離脱した硬質ポリウレタンフォームが、他のノズルユニットに付着しない配置にする必要がある。
次に、上述したノズル清掃装置1を含む断熱材の製造装置について、図1、13を参照して、説明する。
断熱材の製造装置700を使用した断熱材の製造方法は、ウレタンフォーム生成ステップと、金型注入ステップと、軟化ステップと、気体噴射ステップと、拭取りステップと、を備える。軟化ステップと、気体噴射ステップと、拭取りステップは、清掃方法のステップであり、詳細説明は省略する。
Claims (21)
- ポリウレタンフォームを吐出するノズルを清掃するノズル清掃装置であって、
溶剤により前記ノズルに付着したポリウレタンフォームを軟化させる軟化部と、
気体を噴射する噴射ノズルを備え、当該噴射ノズルから気体を噴射させて軟化されたポリウレタンフォームを除去する気体噴射部と、
前記軟化部と前記気体噴射部との間で、前記ノズルを移動させる移動部と、
を備えるノズル清掃装置。 - ポリウレタンフォームが除去された前記ノズルの先端を拭き取る拭取部を、更に備える、
請求項1に記載のノズル清掃装置。 - 前記軟化部は、前記ノズルを前記溶剤に浸漬させてポリウレタンフォームを軟化させる、
請求項1又は2に記載のノズル清掃装置。 - 前記ノズルの先端は、前記気体噴射部の前記噴射ノズルの先端より下方の第1の位置に配置され、前記噴射ノズルは、前記第1の位置に配置された前記ノズルの先端に向けて気体を吹き付ける、
請求項1から3の何れか1項に記載のノズル清掃装置。 - 前記ノズルと前記噴射ノズルとは、前記ノズルの先端が、前記第1の位置から、前記第1の位置より上方で前記噴射ノズルの先端より下方の第2の位置に配置されるまで、相対的に移動され、前記気体噴射部は、相対的に移動されている間、前記ノズルに気体を噴射する、
請求項4に記載のノズル清掃装置。 - 上面視で前記軟化部、前記気体噴射部、前記拭取部の順に配置される、
請求項2に記載のノズル清掃装置。 - 前記軟化部と前記気体噴射部とは、傾斜板で接続される、
請求項1に記載のノズル清掃装置。 - 前記気体噴射部の前記噴射ノズルは、上面視で、先端部の噴射口に向けて幅が徐々に広くなるホーン形状を有し、前記噴射口の形状は扁平である、
請求項1に記載のノズル清掃装置。 - 前記気体噴射部の前記噴射ノズルは、複数の噴射ノズルであり、当該複数の噴射ノズルは、気体が吹き付けられる前記ノズルが配置される領域を囲み同じ高さに配置される、
請求項1に記載のノズル清掃装置。 - 前記複数の噴射ノズルは、各噴射口が下方に傾斜して配置される、
請求項9に記載のノズル清掃装置。 - 前記複数の噴射ノズルは、4つの噴射ノズルであり、当該4つの噴射ノズルは、上面視で90度の間隔で配置されている、
請求項9に記載のノズル清掃装置。 - 前記複数の噴射ノズルは、3つの噴射ノズルであり、当該3つの噴射ノズルは、上面視で120度の間隔で配置されている、
請求項9に記載のノズル清掃装置。 - 前記複数の噴射ノズルは、2つの噴射ノズルであり、当該2つの噴射ノズルは、上面視で180度の間隔で配置されている、
請求項9に記載のノズル清掃装置。 - 前記噴射ノズルは、1つの噴射ノズルであり、噴射口が下方に傾斜して配置される、
請求項1のノズル清掃装置。 - 前記拭取部は、前記ノズルと接触することで前記ノズルの先端を拭き取る拭取台と、前前記ノズルと平行に配置され、前記拭取台を回転させる回転軸と、を備える、
請求項2に記載のノズル清掃装置。 - 前記拭取台の回転軸は、一方向にのみ回転する、
請求項15に記載のノズル清掃装置。 - ポリウレタンフォームを生成するミキシングヘッドであって、生成されたポリウレタンフォームを金型に向けて吐出するノズルを備えるミキシングヘッドと、
前記ミキシングヘッドのノズルを清掃する、請求項1から16の何れか1項に記載のノズル清掃装置と、
を備える断熱材の製造装置。 - ポリウレタンフォームを吐出するノズルを清掃するノズル清掃方法であって、
前記ノズルに付着したポリウレタンフォームを溶剤により軟化させる軟化ステップと、
軟化されたポリウレタンフォームに向けて気体を噴射して、ポリウレタンフォームを除去する気体噴射ステップと、
を備えるノズル清掃方法。 - ポリウレタンフォームが除去された前記ノズルの先端を拭き取る拭取りステップを、更に備える、
請求項18に記載のノズル清掃方法。 - 前記軟化ステップ、前記気体噴射ステップ、前記拭取りステップの順に実行される、
請求項18に記載のノズル清掃方法。 - ノズルから金型にポリウレタンフォームを注入するステップと、
前記金型にポリウレタンフォームを注入した後、前記ノズルを清掃する請求項18から20の何れか1項に記載のノズル清掃方法と、
を備える断熱材の製造方法。
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DE112021006153.4T DE112021006153T5 (de) | 2020-11-25 | 2021-11-17 | Düsensäuberungsvorrichtung, Wärmedämmungsherstellungsvorrichtung, Düsensäuberungsverfahren und Wärmedämmungsherstellungsverfahren |
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0971622A (ja) * | 1995-09-05 | 1997-03-18 | Sanyo Electric Co Ltd | ウレタン注入ノズルの洗浄装置 |
JP2003062850A (ja) * | 2001-08-28 | 2003-03-05 | Kasahara Industries Co Ltd | 発泡スチレン樹脂成型用金型の洗浄装置 |
JP2003260423A (ja) * | 2002-03-12 | 2003-09-16 | Tatsumo Kk | ノズル先端部の洗浄装置及び洗浄方法 |
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JP2007001115A (ja) | 2005-06-23 | 2007-01-11 | Toyo Tire & Rubber Co Ltd | ミキシングヘッド装置 |
JP2020195183A (ja) | 2019-05-27 | 2020-12-03 | 日本電産サンキョー株式会社 | モータ |
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Publication number | Priority date | Publication date | Assignee | Title |
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JPH0971622A (ja) * | 1995-09-05 | 1997-03-18 | Sanyo Electric Co Ltd | ウレタン注入ノズルの洗浄装置 |
JP2003062850A (ja) * | 2001-08-28 | 2003-03-05 | Kasahara Industries Co Ltd | 発泡スチレン樹脂成型用金型の洗浄装置 |
JP2003260423A (ja) * | 2002-03-12 | 2003-09-16 | Tatsumo Kk | ノズル先端部の洗浄装置及び洗浄方法 |
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