JP2006289276A - Method and device for expanding high-viscosity material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for expanding a high-viscosity material, in which the specific gravity of the high-viscosity material and that of a gas can be determined quantitatively and consequently it is not necessary to make the equipment complicated and large and to provide a device for expanding the high-viscosity material. <P>SOLUTION: The gas of the predetermined pressure is mixed in the high-viscosity material from a predetermined position of a material supply pipeline 2 and the rotational speed of a first pump 4 arranged on the material supply pipeline 2 on the upstream side of the gas-mixed position is made lower than that of a second pump 5 arranged on the downstream side of the gas-mixed position so that the high-viscosity material in the gas-mixed position is circulated in the pressure-reduced state, namely, in the pressure lower than that on the outside of the material supply pipeline. As a result, the gas can be sucked/mixed in the high-viscosity material circulating in the material supply pipeline 2. The gas can be mixed easily in the high-viscosity material in the material supply pipeline 2 even though high pressure is not exerted on the gas in a gas supply pipeline 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a foaming method and apparatus for a high-viscosity material for foaming by mixing a gas with a high-viscosity material such as an adhesive used for joining various industrial products, a sealing material for gap filling, a coating material, and the like. Is.

  In general, in the joining of various industrial products such as automobile parts, for example, by mixing a gas such as nitrogen gas, carbon dioxide gas, air, etc. into a high viscosity polymer material such as a hot melt adhesive, foaming it and applying it, The amount of adhesive is reduced and the weight of bonded parts is reduced.

  The high-viscosity material foaming device used for the above-mentioned joining is a mixing chamber in which a material supply pipe and a gas supply pipe are connected to a mixing chamber connected to a material discharge pipe, and a high-viscosity material flows from the material supply pipe. It is known that gas is mixed into a high-viscosity material in a mixing chamber by pressurizing and supplying a gas in a gas supply line (for example, see Patent Document 1).

  However, since the high-viscosity material in the mixing chamber has a pressure for discharging from the material supply line, a high pressure must be applied to the gas in the gas supply line in order to mix the gas. First, high-pressure gas equipment is required. Moreover, since flow control is difficult when the gas pressure is high, there is a problem that the specific gravity of the high-viscosity material and the gas varies, and the foamed state of the material tends to become unstable.

Therefore, in order to solve this problem, a high-viscosity material pumped at a low pressure from the material tank is mixed with a gas having a low pressure of about atmospheric pressure, and the high-viscosity material mixed with the gas is pressurized with a pressurizer. However, it is known that the dispersion pipeline is circulated, and the gas is dispersed in the high-viscosity material by the dispersion pipeline and then discharged from the nozzle of the material supply pipeline (for example, foamed). (See Patent Document 2).
Japanese Patent Application Laid-Open No. 7-100346 Japanese Patent Application Laid-Open No. 2004-1571

  However, in the latter case, a pressurization device for further pressurizing the high-viscosity material pumped at a low pressure is required, which causes a problem that the facility becomes complicated and large.

  The present invention has been made in view of the above problems, and its object is to increase the quantitativeness of the specific gravity between the high-viscosity material and the gas and to increase the complexity and size of the equipment. An object of the present invention is to provide a foaming method and apparatus for a high-viscosity material that does not occur.

  In order to achieve the above object, the present invention foams a high-viscosity material by mixing a foaming gas into the high-viscosity material and dispersing the gas in the high-viscosity material and discharging it from the material supply pipe. In the foaming method of the high viscosity material, a gas having a predetermined pressure is mixed into the high viscosity material from a predetermined position of the material supply line, and the high viscosity material is gas-reduced so as to be in a decompressed state lower than the outside of the material supply line. It distributes to the mixing position.

  Thus, when gas is mixed into the high-viscosity material in the material supply pipe, the high-viscosity material flowing through the gas mixing position is in a reduced pressure state lower than the outside of the material supply pipe. Gas is mixed while being sucked into the high-viscosity material flowing through the gas, and the gas is easily taken into the high-viscosity material without increasing the gas pressure.

  In order to achieve the above object, the present invention mixes a foaming gas into a high-viscosity material, disperses the gas in the high-viscosity material, and discharges the high-viscosity material from the material supply line. In a foaming apparatus for a high-viscosity material to be foamed, a gas supply pipe for mixing a gas at a predetermined pressure from a predetermined position of the material supply pipe into the high-viscosity material flowing through the material supply pipe, and the high-viscosity material as a material supply pipe Material distribution means for distributing the gas to the gas mixing position so that the pressure is lower than the outside of the path.

  Thus, when the gas of the gas supply line is mixed into the high viscosity material of the material supply line, the high viscosity material flowing through the gas mixing position is in a reduced pressure state lower than the outside of the material supply line by the material distribution means. Therefore, the gas in the gas supply line is mixed into the high viscosity material flowing through the material supply line while being sucked, and the gas is easily taken into the high viscosity material without increasing the gas pressure.

  According to the present invention, since the gas can be mixed while sucking the high-viscosity material flowing through the material supply line, the material supply line can be provided without applying high pressure to the gas supplied to the material supply line. The gas can be easily taken into the material. Therefore, a high-pressure gas facility for mixing the gas into the high-viscosity material is not required, and the gas flow rate can be easily controlled because the pressure is low. Thereby, quantitative property can be improved without causing variation in the specific gravity of the high-viscosity material and the gas, and a foam material that is always stable can be obtained. Further, there is no need for a pressurizing device for separately pressurizing the high-viscosity material in the material supply pipe line, so that there is an advantage that the facility is not complicated and enlarged.

  1 to 6 show an embodiment of the present invention, FIG. 1 is a schematic configuration diagram of a high-viscosity material foaming device, FIG. 2 is a block diagram showing a control system, and FIG. 3 is a control unit at the time of material discharge. FIG. 4 to FIG. 6 are flowcharts showing the operation of the control unit when the gas mixture ratio is changed.

  The high-viscosity material foaming apparatus includes a material supply pump 1 that discharges a high-viscosity material, a material supply pipe 2 that circulates the high-viscosity material discharged from the material supply pump 1, and a high flow that circulates through the material supply pipe 2. A gas supply line 3 for mixing gas into a viscous material from a predetermined position of the material supply line 2, and a first pump 4 as a material distribution means provided on the upstream side of the gas mixing position of the material supply line 2; , A second pump 5 as a material flow means provided downstream of the gas mixing position of the material supply pipe 2 and a first dispersion pipe provided downstream of the second pump 5. The first static mixer 6, the second static mixer 7 as a second dispersion pipe provided downstream of the first static mixer 6, and the downstream of the second static mixer 7 Material discharge line 8 and material discharge movement And a control unit 9 for controlling the.

  The material supply pump 1 is a well-known uniaxial pump, which sucks the high-viscosity material A in the material container 1a and discharges it to the material supply line 2 at a predetermined pressure (for example, 0.1 to 20 MPa). In this case, as the high viscosity material A, for example, a high viscosity polymer material such as a hot melt adhesive is used.

  One end of the material supply pipe 2 is connected to the material supply pump 1, and a first pump 4, a second pump 5, a first static mixer 6 and a second static mixer 7 are provided in the pipe. ing.

  One end of the gas supply line 3 is connected to a predetermined position of the material supply line 2, and the other end is connected to the gas cylinder 10. In this case, dry gas, dry nitrogen, carbon dioxide, or a mixed gas is used as the gas in the gas cylinder 10. Further, a check valve 11, a gas supply valve 12, and a pressure adjustment valve 13 are provided in the gas supply pipe 3. The check valve 11 is provided on one end side of the gas supply line 3 so that the gas in the gas supply line 3 flows only to the material supply line 2 side. The gas supply valve 12 is composed of an electromagnetic valve that opens and closes the material supply line 2 and is opened intermittently at predetermined time intervals. That is, the gas supply valve 12 is repeatedly opened for a predetermined time (for example, 0.2 seconds) and closed for a predetermined time (for example, 3.0 seconds). The pressure adjustment valve 13 is a well-known device whose opening degree can be adjusted by a drive mechanism such as a servo motor, and can arbitrarily adjust the gas pressure in the gas supply line 3.

  The first pump 4 is a known constant flow pump capable of adjusting the rotation speed by changing the output (rotation speed), such as a gear pump or a trochoid pump, and is connected to the gas supply pipe 3 in the material supply pipe 2. It is arranged upstream of the connection location (gas mixing position). In this case, the output of the first pump 4 is set so that the rotational speed is smaller than that of the second pump 5. A first on-off valve 14 comprising an electromagnetic valve is provided between the first pump 4 and the gas mixing position, and a pressure gauge 15 is provided between the first on-off valve 14 and the gas mixing position. Yes.

  The second pump 5 is a known constant flow rate pump capable of adjusting the number of revolutions by changing the output (number of revolutions) such as a gear pump or a trochoid pump, and is connected to the gas supply line 3 in the material supply line 2. It is arranged downstream of the connection location (gas mixing position). In this case, the second pump 5 has the same specification as that of the first pump 4, and the output of the second pump 5 is set so that the rotational speed is higher than that of the first pump 4. For example, the output of the first pump 4 is set to 25%, and the output of the second pump 5 is set to 55%. A second on-off valve 16 made of an electromagnetic valve is provided between the second pump 5 and the gas mixing position, and a pressure gauge 17 is provided downstream of the second pump 5.

  The first static mixer 6 has a known configuration in which a large number of mixer elements are arranged in the flow direction in a pipe having a predetermined pipe diameter, and has a pipe diameter larger than that of the second static mixer 7.

  The second static mixer 7 has a known configuration in which a large number of mixer elements are arranged in the flow direction in a pipe having a predetermined pipe diameter, and has a pipe diameter smaller than that of the first static mixer 6.

  The material discharge pipe 8 is formed of a flexible hose having a predetermined pipe diameter made of a flexible material such as a fluororesin, and a pipe having a pipe diameter smaller than that of the second static mixer 7 is used. A discharge valve 18 is attached to the distal end of the material discharge pipe 8, and the discharge valve 18 has a material discharge nozzle 18a. The discharge valve 18 discharges material from the nozzle 18 a by manual operation or automatically, and the diameter of the nozzle 18 a is smaller than the diameter of the material discharge pipe 8.

  The control unit 9 is constituted by a microcomputer, and the material supply pump 1, the first pump 4, the second pump 5, the gas supply valve 12, the pressure regulating valve 13, the first on-off valve 14, and the second on-off valve 16. And a discharge valve 18. In addition, a mixing ratio setting unit 19 is connected to the control unit 9, and the mixing ratio setting unit 19 can arbitrarily set the gas mixing ratio with respect to the high viscosity material.

  Here, the operation of the control unit 9 will be described with reference to the flowchart of FIG. That is, when the discharge valve 18 is opened (S1), the first on-off valve 14 and the second on-off valve 16 are opened (S2, S3), and the gas supply valve 12 is opened intermittently for a predetermined time. Then, the material supply pump 1, the first pump 4, and the second pump 5 are operated (S5, S6, S7). When the discharge valve 18 is closed (S8), the material supply pump 1, the first pump 4 and the second pump 5 are stopped (S9, S10, S11), and the gas supply valve 12 is always closed. (S12), the first on-off valve 14 and the second on-off valve 16 are closed (S13, S14).

  When the discharge valve 18 is opened by the operation of the control unit 9, the material supply pump 1 discharges the high-viscosity material A in the material container 1a to the material supply line 2, and the first pump 4 and the second pump The material flows through the material supply pipe 2 by the pump 5, and the gas adjusted to a predetermined pressure (for example, 0.5 MPa) by the pressure adjusting valve 13 flows between the first pump 4 and the second pump 5. Mixed into the material. At that time, since the rotational speed of the first pump 4 is set lower than the rotational speed of the second pump 5, the material between the first pump 4 and the second pump 5 is less than the external pressure. Will also be in a reduced pressure state. As a result, the gas in the gas supply line 3 is mixed while being sucked into the material between the first pump 4 and the second pump 5, so that the gas pressure is set to a high pressure (for example, 1.0 MPa or more). At least gas can be easily taken into the material. In this case, since the gas in the gas supply line 3 is supplied to the material by the gas supply valve 12 being intermittently opened every predetermined time, the gas is not excessively mixed into the material. Thus, the foaming state of the material to be described later can be adjusted by arbitrarily setting the difference in the rotational speeds of the pumps 4 and 5, the opening time of the gas supply valve 12, or the relationship thereof.

  Next, the material in which the gas is mixed sequentially flows through the first static mixer 6 and the second static mixer 7, and the gas is dispersed in the material in each of the static mixers 6 and 7. At that time, since the tube diameter of the second static mixer 7 is smaller than that of the first static mixer 6, the gas dispersed in the first static mixer 6 is more finely dispersed in the second static mixer 7.

  Then, by discharging the material flowing into the material discharge pipe 8 from the second static mixer 7 from the discharge valve 18, the material released into the atmosphere expands while foaming. At that time, since the diameter of the material discharge line 8 is smaller than that of the second static mixer 7 and the diameter of the nozzle 18a is smaller than the diameter of the material discharge line 8, the material discharge line 8 and Even when circulating through the nozzle 18a, the material is more finely dispersed and a foamed material having a smooth surface can be obtained. When the discharge valve 18 is closed, the first and second on-off valves 14 and 16 are closed. Therefore, even when the first and second pumps 4 and 5 are stopped, the first and second on-off valves 14 and 16 are stopped. The pressure at the gas mixing position between the valves 14 and 16 is maintained at the predetermined pressure.

  Furthermore, when changing the mixing ratio of the gas with respect to the high-viscosity material, as shown in the flowchart of FIG. 4, when the mixing ratio is changed by the mixing ratio setting unit 19 (S20), the mixing ratio is changed so as to increase. If so (S21), the opening of the pressure regulating valve 13 is increased (S22). This increases the amount of gas mixed into the high-viscosity material, increases the mixing ratio, and increases the foaming ratio of the material. When the mixing ratio is changed so as to decrease (S22), the opening degree of the pressure regulating valve 13 is decreased (S23). As a result, the amount of gas mixed into the high viscosity material is reduced, the mixing ratio is reduced, and the foaming ratio of the material is reduced.

  As described above, according to the present embodiment, gas having a predetermined pressure is mixed into the high-viscosity material from a predetermined position in the material supply pipe 2, and the high-viscosity material is in a reduced pressure state from the outside of the material supply pipe 2. Thus, the gas can be mixed while sucking the gas into the material flowing through the material supply line 2 without applying a high pressure to the gas in the gas supply line 3. The gas can be easily taken into the material of the material supply pipe 2. Therefore, a high-pressure gas facility for mixing the gas into the high-viscosity material is not required, and the gas flow rate can be easily controlled because the pressure is low. Thereby, quantitative property can be improved without causing variation in the specific gravity of the high-viscosity material and the gas, and a foam material that is always stable can be obtained. Further, there is no need for a pressurizing device for separately pressurizing the high-viscosity material in the material supply pipe line 2, so that there is an advantage that the facility is not complicated and enlarged.

  Furthermore, by making the rotation speed of the first pump 4 provided on the upstream side of the gas mixing position in the material supply line 2 lower than the rotation speed of the second pump 5 provided on the downstream side of the gas mixing position, Since the high-viscosity material at the gas mixing position is depressurized from the outside of the material supply pipe, the high-viscosity material at the gas mixing position is set only by setting the rotation speeds of the first and second pumps 4 and 5. The pressure can be a negative pressure, and the pressure setting between the first and second pumps 4 and 5 can be performed easily and with high accuracy.

  Further, since the gas is intermittently mixed into the high-viscosity material by the gas supply valve 12 every predetermined time, the gas is not mixed excessively into the material, and the gas is always mixed accurately into the material. Can do.

  Further, after the high-viscosity material is circulated through the first static mixer 6 having a predetermined pipe diameter provided at a predetermined position of the material supply pipe 2, the gas is dispersed in the high-viscosity material, and then the high-viscosity material is Since the gas is dispersed in the high-viscosity material by flowing through the second static mixer 7 having a smaller diameter than that of the static mixer 6, the gas dispersed in the first static mixer 6 is secondly statically mixed. It is possible to disperse more finely with the mixer 7 and to disperse the gas efficiently.

  In this case, since the static mixer is used as the dispersion pipe for dispersing the gas, the gas can be reliably dispersed with a simple structure.

  Further, when the material discharge operation from the material supply line 2 is stopped, the upstream side and the downstream side of the gas mixing position in the material supply line 2 are closed by the first and second on-off valves 14 and 16, respectively. Therefore, even if the first and second pumps 4 and 5 are stopped, the pressure at the gas mixing position between the first and second on-off valves 14 and 16 can be maintained at a predetermined pressure, and the next material discharge When starting the operation, the gas can be quickly mixed into the material.

  Further, since the diameter of the material discharge nozzle 18a attached to the tip of the material discharge pipe 8 is formed to be smaller than the diameter of the material discharge pipe 8, the material discharge pipe 8 and the nozzle 18a are circulated. Even in this case, the material can be more finely dispersed. Thereby, since a foam material with a smooth surface can be obtained, for example, in the case of foaming an adhesive, it is possible to improve the adhesion to an object to be bonded.

  Moreover, since the gas mixing ratio with respect to the high-viscosity material is adjusted by changing the pressure of the gas supplied to the material supply pipe 2 by the pressure adjusting valve 13, the gas mixing ratio is controlled by controlling the pressure adjusting valve 13. It can be easily adjusted and is extremely advantageous when changing the foaming ratio of a material depending on the application.

  In the above-described embodiment, the high-viscosity material is reduced in pressure by the difference in the rotation speed (rpm) of the first and second pumps 4 and 5, but it is replaced with, for example, an upstream pump. Alternatively, a throttle valve or a small diameter pipe may be provided, and a negative pressure may be generated in the material at the gas mixing position by applying a flow resistance to the material before flowing through the gas mixing position. Moreover, in the said embodiment, although dry air or dry nitrogen was illustrated as gas mixed in a high-viscosity material, you may make it use other gas, such as a carbon dioxide gas and mixed gas. Furthermore, in the above-described embodiment, the adhesive is foamed. However, the present invention can also be used for other types of high-viscosity materials such as a sealing material and a coating material.

  5 and 6 show another control example in the case of changing the mixing ratio of the gas with respect to the high viscosity material. That is, as shown in the flowchart of FIG. 5, when the mixing ratio is changed by the mixing ratio setting unit 19 (S30), when the mixing ratio is changed to increase (S31), the gas supply valve 12 is opened. The time is lengthened (S32). This increases the amount of gas mixed into the high-viscosity material, increases the mixing ratio, and increases the foaming ratio of the material. If the mixing ratio is changed so as to decrease (S32), the opening time of the gas supply valve 12 is shortened (S33). As a result, the amount of gas mixed into the high viscosity material is reduced, the mixing ratio is reduced, and the foaming ratio of the material is reduced. That is, since the gas mixing ratio can be easily adjusted by controlling the opening time of the gas supply valve 12, it is extremely advantageous when changing the foaming ratio of the material according to the application.

  Further, as shown in the flowchart of FIG. 6, when the mixing ratio is changed by the mixing ratio setting unit 19 (S40), when the mixing ratio is changed so as to increase (S41), the first pump 4 The rotational speed is lowered (S42). Thereby, the pressure difference between the first and second pumps 4 and 5 is increased, the amount of gas mixed into the high viscosity material is increased, the mixing ratio is increased, and the foaming ratio of the material is increased. When the mixing ratio is changed so as to decrease (S42), the rotational speed of the first pump 4 is increased (S43). Thereby, the pressure difference between the first and second pumps 4 and 5 is reduced, the amount of gas mixed into the high viscosity material is reduced, the mixing ratio is reduced, and the foaming ratio of the material is reduced. That is, the gas mixing ratio can be easily adjusted by controlling the rotation speed of the first pump 4, which is extremely advantageous when changing the foaming ratio of the material according to the application. Note that the rotational speed of the second pump 5 may be controlled instead of the first pump 4, or the rotational speeds of both the first and second pumps 4, 5 may be controlled.

The schematic block diagram of the high-viscosity material foaming apparatus which shows one Embodiment of this invention. Block diagram showing the control system Flow chart showing the operation of the controller during material discharge Flow chart showing the operation of the control unit when changing the gas mixture ratio The flowchart which shows operation | movement of the control part in the other control example at the time of gas mixture ratio change The flowchart which shows operation | movement of the control part in the other control example at the time of gas mixture ratio change

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Material supply pump, 2 ... Material supply line, 3 ... Gas supply line, 4 ... 1st pump, 5 ... 2nd pump, 6 ... 1st static mixer, 7 ... 2nd static mixer, DESCRIPTION OF SYMBOLS 8 ... Material discharge line, 9 ... Control part, 10 ... Gas cylinder, 11 ... Check valve, 12 ... Gas supply valve, 13 ... Pressure regulating valve, 14 ... First on-off valve, 15 ... Pressure gauge, 16 ... First 2 open / close valves, 17 ... pressure gauge, 18 ... discharge valve, 18a ... nozzle, 19 ... mixing ratio setting section, A ... high viscosity material.

Claims (17)

In the foaming method of the high-viscosity material, the gas for foaming is mixed into the high-viscosity material, and the gas is dispersed in the high-viscosity material and discharged from the material supply pipe, thereby foaming the high-viscosity material.
While mixing a gas of a predetermined pressure from a predetermined position of the material supply pipe into the high viscosity material,
A method of foaming a high-viscosity material, characterized in that the high-viscosity material is circulated to a gas mixing position so as to be in a reduced pressure state from the outside of the material supply pipe. By making the rotation speed of the first pump provided upstream of the gas mixing position in the material supply line lower than the rotation speed of the second pump provided downstream of the gas mixing position, The method for foaming a high-viscosity material according to claim 1, wherein the pressure of the high-viscosity material is lower than that outside the material supply pipe. The method for foaming a high-viscosity material according to claim 1 or 2, wherein gas is intermittently mixed into the high-viscosity material every predetermined time. The gas is dispersed in the high-viscosity material by flowing the high-viscosity material through a dispersion pipe having a predetermined pipe diameter provided at a predetermined position of the material supply pipe, and then the high-viscosity material is disposed upstream of the dispersion pipe. The method for foaming a high-viscosity material according to claim 1, 2, or 3, wherein the gas is dispersed in the high-viscosity material by flowing through another dispersion pipe having a pipe diameter smaller than that of the path. The method for foaming a high-viscosity material according to claim 1, 2, 3, or 4, wherein the mixing ratio of the gas to the high-viscosity material is adjusted by changing the pressure of the gas supplied to the material supply pipe. The method for foaming a high-viscosity material according to claim 3, wherein a mixing ratio of the gas to the high-viscosity material is adjusted by changing a supply time of the gas intermittently supplied to the material supply pipe. The foaming of the high-viscosity material according to claim 1, 2, 3 or 4, wherein the mixing ratio of the gas to the high-viscosity material is adjusted by changing the rotational speed of at least one of the first and second pumps. Method. In the high viscosity material foaming apparatus for foaming the high viscosity material by mixing the foaming gas into the high viscosity material and dispersing the gas in the high viscosity material and discharging it from the material supply line.
A gas supply line for mixing a gas having a predetermined pressure from a predetermined position of the material supply line into the high-viscosity material flowing through the material supply line;
A high-viscosity material foaming apparatus, comprising: a material distribution means for circulating the high-viscosity material to a gas mixing position so as to be in a reduced pressure state from the outside of the material supply pipe. The material circulation means is set to a first pump provided upstream of the gas mixing position in the material supply pipe and to a downstream side of the gas mixing position, and set to a higher rotational speed than the first pump. The high-viscosity material foaming apparatus according to claim 8, comprising a second pump. The high-viscosity material foaming apparatus according to claim 8 or 9, further comprising a gas supply valve that intermittently mixes gas in a gas supply line into the high-viscosity material for a predetermined time. A first dispersion pipe having a predetermined pipe diameter, which is provided at a predetermined position of the material supply pipe and disperses a gas in the high-viscosity material;
A second dispersion line that is provided downstream of the first dispersion line and disperses the gas in the high-viscosity material;
The high-viscosity material foaming apparatus according to claim 10, wherein the second dispersion conduit is formed to have a smaller diameter than the first dispersion conduit. The high-viscosity material foaming apparatus according to claim 11, wherein the dispersion pipe is formed by a static mixer. 10. A mixing ratio adjusting means for adjusting a mixing ratio of the gas with respect to the high-viscosity material by changing the pressure of the gas supplied from the gas supply line to the material supply line. A foaming apparatus for a high-viscosity material according to 10, 11 or 12. The mixing ratio adjusting means for adjusting the mixing ratio of the gas with respect to the high-viscosity material by changing the supply time of the gas intermittently supplied to the material supply pipe by the gas supply valve. The foaming apparatus of the high-viscosity material described. The high viscosity according to claim 8, 9, 10, 11 or 12, further comprising a mixing ratio adjusting means for adjusting a mixing ratio of the gas to the high viscosity material by changing a rotation speed of the first pump. Material foaming equipment. A pair of on-off valves are provided on the upstream side and the downstream side of the gas mixing position in the material supply line, respectively, and close the material supply line when the material discharge operation from the material supply line stops. The high-viscosity material foaming device according to claim 8, 9, 10, 11, 12, 13, 14, or 15. A material discharge line provided on the material discharge side of the material supply line;
A material discharge nozzle attached to the tip of the material discharge line,
The high viscosity according to claim 8, 9, 10, 11, 12, 13, 14, 15 or 16, wherein the diameter of the nozzle for discharging the material is made smaller than the diameter of the tube for discharging the material. Material foaming equipment.

Images