WO1998043731A1 - Procede permettant d'incorporer du gaz a un materiau a viscosite elevee et dispositif afferent - Google Patents
Procede permettant d'incorporer du gaz a un materiau a viscosite elevee et dispositif afferent Download PDFInfo
- Publication number
- WO1998043731A1 WO1998043731A1 PCT/JP1998/001498 JP9801498W WO9843731A1 WO 1998043731 A1 WO1998043731 A1 WO 1998043731A1 JP 9801498 W JP9801498 W JP 9801498W WO 9843731 A1 WO9843731 A1 WO 9843731A1
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- WIPO (PCT)
- Prior art keywords
- gas
- viscosity material
- cylinder
- discharge
- piston
- Prior art date
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Classifications
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- 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/3442—Mixing, kneading or conveying the foamable material
- B29C44/3446—Feeding the blowing agent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/235—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids for making foam
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/80—Forming a predetermined ratio of the substances to be mixed
- B01F35/88—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise
- B01F35/882—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise using measuring chambers, e.g. volumetric pumps, for feeding the substances
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- 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
- B29B7/7409—Mixing devices specially adapted for foamable substances with supply of gas
- B29B7/7414—Mixing devices specially adapted for foamable substances with supply of gas with rotatable stirrer, e.g. using an intermeshing rotor-stator system
Definitions
- the present invention relates to a method and an apparatus for mixing gas into a high-viscosity material and a piston pump used for the same, and is used, for example, as a pre-process apparatus of a foaming apparatus for forming a foam gasket or a foam to be filled into a void portion. Is done.
- the present invention also relates to a foaming method and apparatus for a high-viscosity material, and is used, for example, for in-situ molding gaskets, filling in voids, and the like.
- FIG. 5 is a fluid circuit diagram of a foaming device 90 using a conventional mixing device.
- a high-viscosity material stored in a storage can 91 is pumped by a pump 92 and sent to a powder mixer 94.
- the compressed gas filled in the tank 93 is sent to the power mixer 94 after the pressure is adjusted.
- the power mixer 94 is driven to rotate by the motor M and mixes (mixes) the fed high-viscosity material and gas by stirring under high pressure.
- the high-viscosity material and gas mixed by the power mixer 94 are discharged from a nozzle 96 through a pipe 95. Nitrogen gas, carbon dioxide gas, air, etc. are used as the gas.
- a foaming device 90 is used, for example, as a device for applying a high-viscosity polymer material such as a hot-melt adhesive (Japanese Patent Application Laid-Open No. 63-264327).
- Hot-melt adhesives are composed of a thermoplastic polymer that is solid at room temperature, and melt and flow when heated. On the other hand, when the hot melt adhesive is heated and melted and then cooled to room temperature, it becomes a solid and exhibits the adhesive strength and the strength of the adhesive mass.
- Conventional foaming devices for such hot melt adhesives take advantage of the property of rapidly developing strength after cooling before the gas mixed in the hot melt adhesive is dissipated. To form a foam.
- the material and gas in order to mix a high-viscosity material and a gas, The material and gas must be heated and sent to the power mixer 94 or upstream at high pressure.
- the viscosity of high viscosity material is hundreds of thousands cps, since it is considered that the internal pressure of Pawamiki server 9 4 is set to 1 0 0 kg Z cm 2 or more, at the same time the power mixer gas and high-viscosity material In order to feed into 94, the pressure must be higher than that of the high viscosity material.
- the gas pressure When the gas pressure is high, it is difficult to control the flow rate, and a slight error in the flow rate at high pressure appears as a large error at atmospheric pressure. For example, the error in the flow rate at 50 kg Z cm 2 appears 50 times at atmospheric pressure.
- the amount of gas is measured by controlling the flow rate of the gas.Therefore, the mixing ratio of the high-viscosity material and the gas greatly varies due to the difficulty in controlling the flow rate. It is difficult to obtain uniform foaming because the foaming state is unstable.
- the high-pressure tank 93 is used to supply the gas, but when the compressed gas in the high-pressure tank 93 becomes empty, the gas must be replaced, so that maintenance is troublesome.
- An object of the present invention is to provide a method and an apparatus for mixing gas and a piston pump used for the method and apparatus.
- the present invention can introduce a gas into a high-viscosity material at low pressure, is easy to maintain, is excellent in safety, and is advantageous in terms of cost. It is an object of the present invention to provide a method and an apparatus for foaming a high-viscosity material which has solved the above problems. Disclosure of the invention
- the method according to the present invention uses a piston pump in which a piston reciprocates in a cylinder to perform a suction step and a discharge step, and in the suction step of the piston pump, After supplying the gas into the cylinder, supplying the high-viscosity material separately and batchwise into the cylinder after the suction process, and performing the discharge process of the piston pump after the supply of the high-viscosity material is completed. Then, in the discharging step, the gas and the high-viscosity material are discharged into a pipeline.
- the dead space in the cylinder is set to be substantially zero when the piston pump has completed the discharge step.
- the device includes a piston pump for performing a suction process and a discharge process by reciprocating a piston in a cylinder, a gas supply device for supplying gas at a predetermined pressure into the cylinder, A high-viscosity material supply device for supplying a high-viscosity material at a predetermined pressure to the gas supply device in the suction step of the piston pump; and separately supplying the high-viscosity material in a batch manner after the suction step. And a control device for controlling the discharge of the gas and the high-viscosity material to a pipeline by performing a discharge step of the biston pump after the supply of the high-viscosity material is completed.
- the cylinder of the piston pump has a twenty-dollar valve for discharge control at a stroke end of a discharge step, and the gas valve near a stroke end of a discharge step. And a needle valve for controlling the supply of the high-viscosity material in the vicinity of the end of the stroke in the suction process.
- a dead-end valve in the cylinder is provided.
- the space is configured to be substantially zero.
- a piston pump includes: a cylinder; and a piston reciprocating in the cylinder for performing a suction step and a discharge step.
- a needle valve for control is provided near the end of the stroke in the discharge step, and a 21 dollar valve for controlling supply of the gas is provided near the end of the stroke in the suction step.
- a control needle valve is provided, and the dead space in the cylinder becomes substantially zero when the discharge step is completed.
- the method according to the present invention includes: a first step of introducing a gas into the high-viscosity material; A second step of pressurizing a mixture of the high-viscosity material and the gas delivered from the first step by a pump, and passing the mixture in a pressurized state through a dispersion pipe. A third step of dispersing the gas in the high-viscosity material, and a fourth step of foaming by discharging the mixture passed through the dispersion pipe,
- the membrane separation type gas generator is used, in which a piston reciprocates in a cylinder to perform a suction step and a discharge step, and a membrane separation type gas generator that generates gas by supplying compressed air.
- the low-pressure gas generated by the gas generator is supplied to the piston pump to introduce the gas into the high-viscosity material, for example, in a batch system.
- to introduce in a batch system means to introduce by supplying a high-viscosity material and a gas separately.
- nitrogen gas is generated by the membrane separation type gas generator, and the generated nitrogen gas is used as the gas.
- the method according to the present invention may further include supplying gas into the cylinder during the suction step of the piston pump, supplying a high-viscosity material into the cylinder after the suction step, and supplying the high-viscosity material.
- a discharge step of the piston pump is performed. In the discharge step, the gas and the high-viscosity material are discharged to a pipeline.
- the mixing ratio of the gas and the high-viscosity material supplied to the cylinder of the piston pump is controlled by the ratio of the supply pressure thereof. Further, in the method according to the present invention, a mixing ratio of the gas and the high-viscosity material is controlled by measuring an amount of the gas supplied to the cylinder of the piston pump with a gas flow meter.
- the apparatus includes a membrane separation type gas generator for generating nitrogen gas by supplying compressed air, a high viscosity pump for pumping high viscosity material, and a piston reciprocating in a cylinder. Performing a suction process and a discharge process, and delivering a mixture of the high-viscosity material pumped from the high-viscosity pump and the nitrogen gas supplied from the membrane separation type gas generator; A pressure pump for pressurizing a mixture of the high-viscosity material and the gas delivered from a pump; and dispersing the gas in the high-viscosity material by passing the mixture in a pressurized state. A dispersing pipe, and a discharge for discharging the mixture passing through the dispersing pipe. And a device.
- High-viscosity materials include adhesives, sealing materials for gap filling, coating materials, gasket materials for on-site foaming, filling and foaming in voids, etc., moisture-curing materials, thermosetting materials, and reaction-curing materials. Materials, hot melt materials and the like. In any case, in the method and the apparatus of the present invention, it is desirable that the material be cured or solidified promptly after the discharge and foaming, and the material is cured or solidified in a state where a gas is dispersed in a high-viscosity material.
- nitrogen gas nitrogen gas, carbon dioxide gas, air, or the like can be used.
- a long hose or pipe of about several meters to several tens of meters is used as a dispersion pipe for dispersing a gas in a high-viscosity material.
- hoses or pipes may be used, for example, in a straight or arcuate or helical form and as a distributing pipeline unit mounted on a frame to support it.
- the mixture of the high-viscosity material and the gas passes through the dispersion pipe under a pressurized state, so that the gas is miniaturized by the shearing force and is dispersed in the high-viscosity material.
- Membrane separation type gas generator 0. In 1 to 5 kg / cm 2 in the range of about, preferably supplies 0. 1 to 3 kg Z cm 2 about the low pressure of the gas is adjusted within a range of.
- Membrane-separated gas generators use the difference in gas permeation rate to separate and generate gas in air. The rate at which a gas permeates a membrane depends on the solubility and diffusion of the gas molecules into the membrane. Nitrogen has the lowest membrane permeation rate among the air components, so the separation efficiency is high.
- the membrane separation type gas generator can continuously extract nitrogen gas by supplying compressed air.
- compressed air is supplied to a port 31, and gas having a pressure set in a pressure regulating valve 34 is supplied to a pipe 39 B from a gas supply device 10.
- the motor M 1 A is controlled, and a high-viscosity material MV at a predetermined high pressure is supplied from the high-viscosity material supply device 11 to the pipe 39 A by a screw pump rotated and driven by the motor M 1 A as necessary.
- the piston moves from the discharge end to the suction end to perform the suction process.
- the dollar valve NV1 is opened after a lapse of time T1 since the movement of the biston is started, and gas is supplied.
- the $ 21 valve NV 1 closes. Therefore, when the suction process is completed, the inside of the cylinder is filled with the gas having the adjusted pressure.
- the gas volume will be about 1 Z200.
- an amount of high-viscosity material equal to the volume of the cylinder is mixed with the same volume of 1 kgZcm 2 of gas.
- 1 k gZ cm 2 of the gas of the same volume as silicon Sunda one volume is the same as the gas 2 times atmospheric pressure cylinder one volume (pressure O k gZcm 2).
- supplying the gas of l kgZcm 2 means that the pressure in the cylinder is approximately-1 kg gZ cm 2 until the gas is supplied in the suction process.
- the mixing ratio R of the gas and the high-viscosity material is 2 to 1 because the gas is compressed to one half with respect to the cylinder volume of one. If the gas supply pressure is generalized as P1, the mixing ratio R will be (P1 + 1): 1. That is, by adjusting the gas supply pressure P1, the mixing ratio R can be easily adjusted or controlled.
- the needle valve NV5 After a lapse of time T5 after the needle valve NV3 is closed, the needle valve NV5 is opened, the piston moves from the suction end to the discharge end, and the discharge process is performed. During the discharge process, the dollar valves NV 1 and NV 3 are closed, and the dead space becomes substantially zero by keeping the tip of the needle flush with the inner peripheral surface of the cylinder. All of the gas and the high-viscosity material charged in the cylinder are discharged from the opening of the needle valve NV5. After a lapse of time T6 after the end of the discharge step, the next suction step starts. -When multiple biston pumps are provided, one discharge process is completed and the other starts the discharge process. By doing so, the layered structure of the high-viscosity material and the compressed gas in each piston pump is sequentially turned into a plurality of piston pumps. From the pump into the pipeline. BRIEF DESCRIPTION OF THE FIGURES
- FIG. 1 is a circuit diagram showing a part of a foaming apparatus according to the present invention (that is, a mixing supply apparatus).
- FIG. 2 is a circuit diagram showing the remaining part of the foaming device according to the present invention (that is, a pressurizing device, a dispersing device, and a discharging device).
- FIG. 3 is a sectional front view showing the structure of the piston pump.
- FIG. 4 is a timing chart for explaining the operation of the piston pump.
- FIG. 5 is a fluid circuit diagram of a conventional high-viscosity material foaming apparatus. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 is a circuit diagram showing a part of a foaming apparatus 1 according to the present invention (in other words, a circuit diagram of a batch type mixing and supplying apparatus 5 according to the present invention).
- FIG. 2 is a circuit diagram of a foaming apparatus 1 according to the present invention. Circuit diagram showing the remaining part, Fig. 3 is a sectional front view showing the structure of piston pumps 45A and 45B, and Fig. 4 is timing for explaining the operation of piston pumps 45A and 45B. It is a chart.
- a foaming device 1 includes a gas supply device 10, a high-viscosity material supply device 11, and a gas introduction device 12, which are provided corresponding to the first step of the present invention.
- Accelerator 13 provided for the third process
- Dispersion device 14 provided for the third process
- Discharge device 15 provided for the fourth process, and all of them It is composed of a control device 19 for controlling the control.
- the gas supply device 10, the high-viscosity material supply device 11, the gas introduction device 12, and the control device 19 constitute a batch-type introduction / supply device, that is, a mixing / supply device 5, according to the present invention as shown in FIG. Have been.
- the mixing supply device 5 corresponds to the mixing device in the present invention.
- the gas supply device 10 has a low pressure adjusted in the range of about 0.1 to 5 kg Z cm 2 , preferably in the range of about 0.1 to 3 kg Z cm 2 .
- Supply gas In this embodiment, a known nitrogen gas generator (membrane separation gas) configured to separate and extract nitrogen gas by a membrane separation method by supplying compressed air. Generator).
- a gas supply device 10 includes a port 31 for receiving compressed air from a compressor, a filter 32, a membrane separation module 33, a pressure regulating valve 34, and a gas flow rate. It consists of a total of 35, etc.
- the membrane separation module 33 separates and generates gas in the air by utilizing the difference in gas permeation rate.
- the rate at which a gas permeates a membrane depends on the solubility and diffusion of the gas molecules into the membrane. Nitrogen has the lowest permeation rate among the air components, so the separation efficiency is high.
- the membrane separation module 33 of the present embodiment water and oxygen having a high permeation rate are discharged to the outside of the membrane, and nitrogen having a low permeation rate is extracted as a gas.
- the pressure of the nitrogen gas output from the membrane separation module 33 is about 0.5 to 1 kg Z cm 2 lower than the input compressed air pressure.
- a membrane separation module 33 for example, a UT series manufactured by Taiyo Toyo Oxygen Co., Ltd. can be used.
- the high-viscosity material supply device 11 feeds the high-viscosity material within a range of about 100 to 300 kg / cm 2 , preferably a range of 150 to 250 kg Z cm 2. Dispense by pressure.
- a follower-above plunger pump 42A is used as a pump for feeding a high-viscosity material.
- the plunger pump 42A presses the high-viscosity material MV filled in the storage can with a plate driven by a cylinder device (not shown) and sends it out to the conduit 39A.
- the gas introduction device 12 is composed of two piston pumps 45 A and 45 B that operate alternately.
- the respective pistons are linearly driven reciprocally by motors M2A and M2B, whereby the pistons reciprocate in the cylinder and the suction process and the discharge process. I do.
- the piston pumps 45 A and 45 B are interposed between the pipe 39 A and the pipe 44 A, and the high-viscosity material MV pumped from the high-viscosity material supply device 11 and the gas supply device 1
- the gas delivered from 0 is separately introduced in a batch manner at a predetermined ratio.
- the structure of the piston pumps 45A and 45B will be described. Since these structures are identical to each other, only one piston pump 45A will be described.
- the piston pump 45A includes a cylinder 451, a piston 452 that slides tightly in the cylinder 451, and three needle valves NV1 and NV1 provided in the cylinder 451. It consists of NV3 and NV5.
- the needle valve NV5 is for discharge control, and is provided at the stroke end of the discharge process in the piston pump 45A.
- the needle valve NV3 is for controlling gas supply, and is provided near the stroke end of the discharge process.
- the needle valve NV1 is for controlling the supply of the high-viscosity material MV, and is provided near the stroke end of the suction process.
- the needle valves NV 1, NV 3, and NV 5 have substantially the same structure as each other.
- the needle 453 is driven by a pneumatic cylinder to move in the axial direction, and the tip of the needle 453 is moved to the inner peripheral surface or end surface of the cylinder 451. Open and close the opening 454 provided in the.
- the valve body is provided with a port 455 communicating with the valve chamber.
- the tip of the needle 453 is flush with the inner peripheral surface or end surface of the cylinder 451, and the dead space between the piston 452 and the piston 452 is substantially zero. Has become. Therefore, when the needle valves NV1, NV3, and NV5 are closed, a part of the gas or the high-viscosity material supplied to the inside of the cylinder 451 is used for the needle valves NV1, V3, and NV5. When the needle valve NV5 is opened and the discharge process is performed without entering the chamber or the like and staying, all of the gas and the high-viscosity material supplied into the cylinder 451 are discharged.
- Check valves CV 3 and 4 are provided in line 39 B, and check valves CV 5 and 6 are provided in line 44 A.
- the capacity (discharge capacity) of the cylinder of the piston pumps 45A and 45B is determined by the diameter and the stroke (moving distance) of the piston 452.
- the diameter of the piston 452 is 16 mm
- the stroke D is 125 mm
- the capacity is 25 cc.
- the control device 19 supplies gas into the cylinders 451 of the piston pumps 45A and 45B in the suction process, and supplies the high-viscosity material MV in a batch system after the suction process.
- the motor M1A, M2 A, M2 B and the needle valves NVI, NV3, NV are supplied so that the gas and high-viscosity material are discharged to the pipe 44A after the supply of the high-viscosity material MV is completed.
- FIG. 4 is a timing chart for explaining the operation of the piston pumps 45A and 45B.
- Compressed air is supplied to the port 31 shown in FIG. 1, and gas having the pressure set in the pressure regulating valve 34 is supplied from the gas supply device 10 to the conduit 39B.
- the motor M 1 A is controlled, and a high-viscosity material MV at a predetermined high pressure is supplied to the pipe 39 A from the high-viscosity material supply device 11 as required by a screw pump rotated and driven by the motor M 1 A. Is done.
- the biston 452 moves from the discharge end to the suction end, and performs a suction process.
- the dollar valve NV1 is opened and gas is supplied.
- the time T1 is about 1 to 2 seconds, during which time the inside of the cylinder 451 is under negative pressure.
- Needle valve NV1 closes some time after Viston 452 reaches the suction end. Therefore, when the suction process is completed, the inside of the cylinder 451 is filled with the gas having the adjusted pressure. The amount of gas sucked into the cylinder 451 in one suction process is measured by the gas flow meter 35, and if it is smaller than the set value, an alarm is issued from the control device 19. As described above, the supply amount of gas in the inhalation process is monitored by the control device 19.
- the needle valve NV3 After a lapse of time T3 since the needle valve NV1 closed, the needle valve NV3 opens.
- the time T3 is about 0.1 to 0.5 seconds, which prevents the needle valves NV1 and NV3 from opening at the same time.
- the high-viscosity material MV is supplied from the high-viscosity material supply device 11, and is charged into the cylinder 4 51. Due to the high pressure of the high viscosity material, the low pressure gas previously charged in cylinder 451 is compressed at a rate equal to its pressure ratio, resulting in an almost negligible volume.
- the gas volume will be about 1 Z200.
- a high-viscosity material in an amount equal to the volume of the cylinder 451 is mixed with the same volume of 1 kgZcm 2 of gas.
- 1 k gZ cm 2 of the gas of the same volume as the volume of cylinder one 451 is the same as the gas 2 times atmospheric pressure cylinder one 45 1 volume (pressure 0 k gZcm 2).
- the expansion ratio A in this case is “3”. If the gas supply pressure is represented by P1 as a general formula, the expansion ratio A is (P1 + 2).
- Time T5 is in the range of about 0.1 to 0.5 seconds.
- the needle valves NV 1 and NV 3 are closed, and the tip of the needle 453 is flush with the inner peripheral surface of the cylinder 45 1, so there is no dead space. All of the charged gas and the high-viscosity material are discharged from the opening 454 of the needle valve NV5.
- the next suction step starts.
- Time T6 is in the range of about 0.1 to 0.5 seconds.
- One of the piston pumps 45A and 45B starts the discharge process after the other ends the discharge process.
- a mixed substance mixed substance
- the contaminants are formed in the pipe 44A in such a manner that the high-viscosity material and the compressed gas for one discharge process are each formed in two layers, and the two layers are discontinuously connected.
- Each piston pump 45 A If the capacity of 45 B is made as small as about 25 cc, the contaminants in the pipe 44 A will be in a pulsed state. By doing so, when the dispersion process is performed later, the dispersion is more effectively performed.
- FIG. 2 is a circuit diagram of the pressurizing device 13, the dispersing device 14, and the discharging device 15.
- a pressurizing device 13 includes a piston pump 51A, 51B that pressurizes a fluid by a piston that is linearly reciprocally driven by a motor, on-off valves 52A, 52B,
- a mixer may be provided before and after the pressurizing device 13 as needed.
- the contaminants sent out to line 44A are pressurized by alternately operating piston pumps 51A and 5IB, and are pumped to line 57.
- the contaminants in the line 44A are sucked into the cylinder.
- the piston moves downward with the on-off valve 52A closed and the on-off valve 53A open, the mixture in the cylinder is pushed out and pressurized.
- the pressure in the cylinder is detected by the pressure sensor 55 A, and a detection signal is sent to the control device 19.
- the extrusion pressure from Bisutonponpu 5 1 A is a 1 50 k gZc m 2 or more.
- the rotation speed of the motor that drives the piston is controlled by a signal from the control device 19, whereby the suction and extrusion of the piston pump 51A and the flow rate thereof are performed.
- the dispersion device 14 includes a dispersion pipe 61 and an on-off valve 65.
- the dispersion pipe 61 is a hose with an inner diameter of about 8 to 10 mm and a length of about 2 to 10 m.
- the pressure of the mixture is 150 kg / cm 2 or more, for example, 200 to 250 kgZcm 2 , and the flow rate is about 200 cc / min. While the pressurized mixture flows through the dispersion pipe 61, the gas is dispersed into the high-viscosity material MV as fine particles having an average diameter of about 0.01 mm.
- the pressure, inner diameter, and length inside the dispersion pipe 61 may be set according to the viscosity characteristics, specific gravity, and required discharge amount of the high-viscosity material MV.
- the phenomenon of gas dispersion in the dispersion pipe 61 is considered as follows. That is, the gas flowing together with the high-viscosity material MV in the dispersion pipe 61 moves toward the pipe wall having a lower flow velocity because the specific gravity is significantly lower and the viscosity is lower than that of the high-viscosity material MV. At the same time, it is dispersed in the high-viscosity material MV by the shear force generated between the pipe wall and the high-viscosity material MV.
- the gas volume is reduced by pressurization, the more the gas is pressurized, the greater the dispersion effect. In other words, large bubbles first move toward the tube wall and are shredded by shear forces into small bubbles.
- the diameter of the bubbles is ultra-fine and mixed in a high-viscosity material MV, the difference in specific gravity and the difference in viscosity from only the high-viscosity material MV is reduced. A phenomenon occurs. When the pressure in the pipe decreases, the volume of the bubbles increases, and the bubbles move to the pipe wall, where they are sheared again. Such a phenomenon is repeated, and the gas is sheared and dispersed in the high-viscosity material MV.
- the discharging device 15 is for returning the mixture discharged from the dispersing device 14 to normal pressure and discharging and foaming the mixture.
- the discharge device 15 includes a discharge pipe 71, a discharge on-off valve 72, a nozzle 73, and the like.
- the mixture discharged from the dispersing device 14 discharges a mixture of the high-viscosity material MV and gas from the nozzle 73, and discharges the gas when discharged. Expands and foams.
- the foamed high-viscosity material MV is applied or formed into a predetermined shape.
- the control device 19 controls the entire foaming device 1 and online-controls a series of steps for discharging the high-viscosity material MV so that the expansion ratio A becomes a set value.
- the expansion ratio A is defined by the following equation.
- V Volume per unit mass of foamed high-viscosity material (when open to atmosphere)
- V. Volume per unit mass of high viscosity material before foaming
- the expansion ratio ⁇ can be set, for example, in a range of about 1 to 4. In the case of in-situ foamed gaskets, usually set to an appropriate value in the range of 2-4.
- the high-viscosity material MV and gas are mixed by a simple device. Therefore, mixing can be performed at an accurate mixing ratio R. Therefore, in the foaming apparatus 1, the expansion ratio A can be controlled with high accuracy. In particular, since the dead space is substantially zero and the biston pumps 45 A and .45 B can be neglected, the capacity is accurate, and thus the mixing ratio R is accurate. In the past, the mixing ratio R was controlled by measuring the gas flow rate, and it was difficult to measure the flow rate with high accuracy, so control was not easy and the accuracy of the mixing ratio R was low. (If the gas flow rate is measured to control the mixing ratio R, the flow rate is also used for measurement, and the accuracy of the mixing ratio R is improved.)
- a gas having a low pressure of about the atmospheric pressure can be mixed with the high-viscosity material MV, a gas supply device 10 having a low pressure output using a membrane separation module 33 can be used. Therefore, it is not necessary to use a tank filled with high-pressure gas, and maintenance such as replacement of the tank is not required, and no space is required.
- the flow rate of gas can be accurately measured by the gas flow meter 35, and the operation of the piston pumps 45A and 45B can be monitored with high accuracy.
- the apparatus using the membrane separation module 33 as the gas supply apparatus 10 has been described.
- an apparatus using a tank filled with a high-pressure gas, a pressure regulating valve, or the like may be used.
- the discharge amount can be increased, and continuous constant discharge can be performed.
- three or more piston pumps instead of two may be used. These piston pumps may be operated alternately or with a time difference.
- continuous discharge can be achieved by increasing the operation speed of the suction process with respect to the reverse rotation speed of the discharge process.
- a premixer that shears and mixes the contaminants by rotating the blades may be provided in the middle of the pipe 44A of the pressurizing device 13.
- the gas can be miniaturized by flowing the mixture through the dispersion pipe 61 in a pressurized state, and the dispersion efficiency is improved.
- the dispersion pipe 61 may be a hose having an appropriate inner diameter and length, maintenance is easy and cost can be reduced.
- the discharge device 15 is attached to a robot and configured to move by a manifold so as to draw a predetermined trajectory, a pipe or a space between the pressurizing device 13 and the discharge device 15 is provided. It is necessary to connect with a hose.
- the distribution pipe 61 can be used for connection.
- the dispersing line 61 can be used in combination with an ordinary mixer such as a power mixer or a mixer. These ordinary mixers may be provided in any of the first step, the second step, the third step, and the fourth step.
- a pipe in which a pipe having a predetermined inner diameter and a predetermined length is spirally wound into a unit shape may be used.
- a steel pipe can be used.
- the nominal diameter is 3Z8
- the total length is about 10 to 5m
- the nominal diameter is 1 to 4
- the total length is about 10 to 2m.
- a pressure adjusting valve is provided after or before and after the dispersion pipe 61, and the pressure adjustment valve is controlled so that the high-viscosity material MV in the dispersion pipe 61 is maintained at a high pressure.
- the pressure may be adjusted.
- the front pressure control valve is set to about 150 to 350 kg Z cm 2 or more, and the rear pressure control valve is set to about 50 to 250 kg cm 2 .
- the configuration, shape, dimensions, material, quantity, capacity, operation timing, etc. of each part or the entirety of the gas supply device 10, the mixing supply device 5, or the foaming device 1, lb are described in accordance with the gist of the present invention. Other than the above, it can be appropriately changed.
- gas can be mixed into a high-viscosity material at a low pressure, and can be mixed at an accurate mixing ratio.
- gas can be introduced into a high-viscosity material at a low pressure in a batch manner, so that maintenance is easy, safety is excellent, and cost is advantageous. You. Moreover, the gas and the high-viscosity material can be introduced at an accurate mixing ratio, and the control of the expansion ratio is easy.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Accessories For Mixers (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98911152A EP0974391B1 (en) | 1997-04-01 | 1998-04-01 | Method and apparatus for mixing gas into high-viscosity material |
DE69827938T DE69827938T2 (de) | 1997-04-01 | 1998-04-01 | Verfahren und gerät zum mischen eines gases mit einem hochviskosen material |
US10/140,823 US7338980B2 (en) | 1995-12-01 | 2002-05-09 | Method and apparatus for mixing a high-viscosity material into a gas |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9/82557 | 1997-04-01 | ||
JP9/82556 | 1997-04-01 | ||
JP08255797A JP3445463B2 (ja) | 1997-04-01 | 1997-04-01 | 高粘度材料の発泡方法及び装置 |
JP08255697A JP3212533B2 (ja) | 1997-04-01 | 1997-04-01 | 高粘度材料へのガスの混入方法及び装置 |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/153,330 Continuation-In-Part US5984280A (en) | 1995-12-01 | 1998-09-15 | Apparatus for foaming a viscous material |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09381833 A-371-Of-International | 1998-04-01 | ||
US09/434,201 Continuation-In-Part US6538040B1 (en) | 1995-12-01 | 1999-11-04 | Method and apparatus for mixing a high-viscosity material into a gas |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998043731A1 true WO1998043731A1 (fr) | 1998-10-08 |
Family
ID=26423582
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1998/001498 WO1998043731A1 (fr) | 1995-12-01 | 1998-04-01 | Procede permettant d'incorporer du gaz a un materiau a viscosite elevee et dispositif afferent |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0974391B1 (ja) |
DE (1) | DE69827938T2 (ja) |
WO (1) | WO1998043731A1 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100491103C (zh) * | 2003-01-07 | 2009-05-27 | 新时代技研株式会社 | 机械发泡装置用-液型固化糊状材料 |
DK1493899T3 (da) * | 2003-07-01 | 2007-03-26 | Paul Vogt | Fremgangsmåde og indretning til fastgörelse af foliebaner på bygnings-værkflader |
JP4731940B2 (ja) | 2005-02-14 | 2011-07-27 | サンスター技研株式会社 | 発泡方法及びその装置 |
ITUD20130022U1 (it) * | 2013-05-10 | 2014-11-11 | Stefano Lunazzi | Elettrodomestico portatile per la produzione di panna montata e/o burro e/o per la formazione di schiuma derivata da idonei liquidi di partenza |
DE102016114898A1 (de) * | 2016-08-11 | 2018-02-15 | Ceracon Gmbh | Vorrichtung und Verfahren zum Schäumen eines viskosen Materials |
CN114929371A (zh) * | 2019-12-27 | 2022-08-19 | 新时代技研株式会社 | 气体供给系统、机械发泡系统以及对气体进行供给的方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60137427A (ja) * | 1983-12-26 | 1985-07-22 | Niigata Eng Co Ltd | 液体への気体混入を制御する方法 |
JPS60155420A (ja) * | 1983-09-02 | 1985-08-15 | エラストグラン、マシ−ネンバウ、ゲゼルシヤフト、ミツト、ベシユレンクテル、ハフツング | 少なくとも2つの合成物質成分から成る化学反応可能な混合物を製造する混合ヘツド |
JPS63264327A (ja) * | 1987-04-09 | 1988-11-01 | ノードソン コーポレーシヨン | 高粘度ポリマー材料の発泡方法と装置 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4067484A (en) * | 1976-05-06 | 1978-01-10 | Standlick Ronald E | Variably adjustable measured increment power dispensing apparatus |
US5127552A (en) * | 1989-08-24 | 1992-07-07 | Dow Corning Corporation | Foam mixer-applicator with foaming chamber and method of using |
GB9013747D0 (en) * | 1990-06-20 | 1990-08-08 | Rapra Techn Ltd | Production of thermoplastics foams |
JP3177037B2 (ja) * | 1992-12-28 | 2001-06-18 | タイヨーテクノ株式会社 | 流動性材料にガスを混入させる方法 |
EP1000723B1 (en) * | 1995-12-01 | 2003-09-24 | Sunstar Engineering Inc. | Apparatus for foaming a viscous material |
-
1998
- 1998-04-01 EP EP98911152A patent/EP0974391B1/en not_active Expired - Lifetime
- 1998-04-01 WO PCT/JP1998/001498 patent/WO1998043731A1/ja active IP Right Grant
- 1998-04-01 DE DE69827938T patent/DE69827938T2/de not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60155420A (ja) * | 1983-09-02 | 1985-08-15 | エラストグラン、マシ−ネンバウ、ゲゼルシヤフト、ミツト、ベシユレンクテル、ハフツング | 少なくとも2つの合成物質成分から成る化学反応可能な混合物を製造する混合ヘツド |
JPS60137427A (ja) * | 1983-12-26 | 1985-07-22 | Niigata Eng Co Ltd | 液体への気体混入を制御する方法 |
JPS63264327A (ja) * | 1987-04-09 | 1988-11-01 | ノードソン コーポレーシヨン | 高粘度ポリマー材料の発泡方法と装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP0974391A4 * |
Also Published As
Publication number | Publication date |
---|---|
DE69827938D1 (de) | 2005-01-05 |
EP0974391A4 (en) | 2002-08-28 |
EP0974391A1 (en) | 2000-01-26 |
EP0974391B1 (en) | 2004-12-01 |
DE69827938T2 (de) | 2005-05-25 |
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