[go: up one dir, main page]

WO2011066095A1 - Appareil et procédé de mélange et de distribution de fluide - Google Patents

Appareil et procédé de mélange et de distribution de fluide Download PDF

Info

Publication number
WO2011066095A1
WO2011066095A1 PCT/US2010/055945 US2010055945W WO2011066095A1 WO 2011066095 A1 WO2011066095 A1 WO 2011066095A1 US 2010055945 W US2010055945 W US 2010055945W WO 2011066095 A1 WO2011066095 A1 WO 2011066095A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluid
circulation loop
circulation
loop
mixing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2010/055945
Other languages
English (en)
Inventor
Arnold William Braun
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dow Global Technologies LLC
Original Assignee
Dow Global Technologies LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dow Global Technologies LLC filed Critical Dow Global Technologies LLC
Publication of WO2011066095A1 publication Critical patent/WO2011066095A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/7476—Systems, i.e. flow charts or diagrams; Plants
    • B29B7/7485—Systems, i.e. flow charts or diagrams; Plants with consecutive mixers, e.g. with premixing some of the components
    • 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
    • B01F23/70—Pre-treatment of the materials to be mixed
    • 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
    • B01F23/70—Pre-treatment of the materials to be mixed
    • B01F23/711—Heating materials, e.g. melting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/50—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/82—Combinations of dissimilar mixers
    • 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
    • B29B7/7663—Mixers with stream-impingement mixing head the mixing head having an outlet tube with a reciprocating plunger, e.g. with the jets impinging in the tube
    • 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
    • B29B7/7663—Mixers with stream-impingement mixing head the mixing head having an outlet tube with a reciprocating plunger, e.g. with the jets impinging in the tube
    • B29B7/7684—Parts; Accessories
    • B29B7/7689—Plunger constructions
    • B29B7/7694—Plunger constructions comprising recirculation channels; ducts formed in the plunger
    • 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
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
    • B29C67/246—Moulding high reactive monomers or prepolymers, e.g. by reaction injection moulding [RIM], liquid injection moulding [LIM]

Definitions

  • This invention relates to an apparatus for mixing and dispensing fluids, and to a method for using same.
  • resin systems are designed to be dispensed as liquids which are then cured. These resin systems often include some type of resin precursor and a curing agent.
  • the resin precursor is generally a low molecular weight oligomeric or monomeric material, although in some cases it can be a higher molecular weight polymer.
  • the curing agent is a material that reacts with functional groups on the resin precursor to form a high molecular weight and/or crosslinked material.
  • Many polyurethane and epoxy resin systems are two-part systems that are dispensed as liquids and cured in this way.
  • Temperature control is often important for two reasons. First, temperature affects the rate of reaction between the resin precursor and the curing agent, and therefore directly affects cure rates and, when the foam is produced, the density of the foam. In addition, the viscosity of the components is in many cases highly dependent on temperature. In such cases, temperatures are often controlled so that the viscosity of one or more of the starting materials is within a workable range.
  • Component temperatures are normally adjusted to close to the operating temperature before the components are introduced into the dispensing equipment, because, for cost reasons, the dispensing equipment typically is not designed to have the needed heating capacity or because the dispensing equipment is not designed to handle the high viscosities of the cold materials.
  • the processing equipment typically will draw the starting materials from so-called “bulk storage” units, which are large capacity storage vessels. If large volumes of materials are processed over short periods of time, it is sometimes efficient to at least partially control temperatures at the bulk storage units. However, this practice becomes more wasteful when the bulk stored material is consumed slowly, as this requires that large volumes of material be maintained for extended periods at or near the processing temperature, until they are consumed. Therefore, "day tanks” are commonly used to bring smaller volumes of material up to near the operating temperature. The day tanks are interposed between the processing equipment and bulk storage. The day tanks are typically sized to handle volumes of material that will be consumed within a few hours up to one day. Material is transferred from bulk storage to the day tanks where the temperature is adjusted to the needed temperature, and is transferred on demand to the processing equipment.
  • This invention is in one aspect a mixing and dispensing system, comprising a first circulation loop b) and second circulation loop c), each in fluid communication with a circulating- type mix head a).
  • the circulating-type mix head a) includes separate first and second fluid circulation paths, a mixing and dispensing chamber, and an actuator which, upon actuation, allows a predetermined quantity of fluid from the first circulation path and a predetermined quantity of fluid from the second circulation path to each enter the mixing and dispensing chamber, mix and become dispensed together out of the mix head.
  • the first circulation loop b) includes
  • conduit means that define a closed loop that includes the first fluid circulation path of the mixing head
  • heating means upstream of the first circulation path of the mix head, for heating fluid in the first circulation loop to a predetermined temperature
  • b-4) an inlet, downstream of the mix head and upstream of heating means b-3), for introducing additional fluid to fluid already circulating in the first circulation loop; b-5) dispersing means, upstream of heating means b-3), for dispersing additional fluid introduced into the first circulation loop through inlet b-4) into fluid already circulating in the first circulation loop and equilibrating the temperature of the resulting fluid mixture;
  • b-6) measurement means for monitoring the fluid flow in the first circulation loop; and b-7) detection means for detecting at least one of pressure, temperature and air bubbles in the fluid flow in the first circulation loop.
  • the second circulation loop c) includes
  • conduit means that define a closed loop that includes the second fluid circulation path of the mixing head
  • heating means upstream of the mix head, for heating fluid in the second circulation loop to a predetermined temperature
  • Second circulation loop c) may further include a dispersing means c-7) upstream of heating means c-3), for dispersing additional fluid introduced into the second circulation loop via inlet c-4) into fluid already circulating in the second circulation loop and equilibrating the temperature of the resulting fluid mixture.
  • First circulation loop b) is adapted to receive and mix a liquid component from an outside source such as a bulk storage unit, mix the incoming liquid with a fluid already circulating within the circulation loop and quickly equilibrate the temperature of the mixed fluids.
  • the mixed fluid is then heated to the necessary processing temperature within the first circulation loop, and can be mixed with fluid from the second circulation loop c) and dispensed upon demand.
  • Second circulation loop c when it contains optional dispersing means c-7), is similarly capable of receiving and mixing a liquid component from an outside source.
  • This invention is also a process for mixing and dispensing at least two fluids, comprising
  • Figure 1 is a schematic diagram of an embodiment of a mixing and dispensing system of the invention.
  • Figures 2 and 2B are schematic diagrams of circulating-type mix head useful with the invention.
  • Figure 3 is a schematic diagram of an embodiment of a dispersing tube that is useful as the dispersing means in this invention.
  • mixing and dispensing system 10 includes as major components circulating-type mix head 1, first circulation loop 2, second circulation loop 3 and optional but preferred hydraulic activation unit 4.
  • Circulating-type mix head 1 includes a first and a second circulation path, which respectively permit fluids in the first and second circulation loops to be circulated through the mix head during operation, except at times of shot delivery.
  • Figures 2A and 2B illustrate an embodiment of such a mix head.
  • casing 11 defines a central bore 13 which extends to outlet 19.
  • Actuator pin 12 fits within central bore 13.
  • Casing 11 includes exit port 14A and entry port 15A, which are in fluid communication with second circulation loop 3 via lines 31.
  • Casing 11 also includes exit port 14B and entry port 15B, which are in fluid communication with first circulation loop 2 via lines 21.
  • actuator pin 12 is moveable between a closed position, as shown in Figure 2A, and an open position, as shown in Figure 2B.
  • Actuator pin 12 includes a narrowed central section 12A and a distal thicker section 12B.
  • Distal thicker section 12B preferably is fitted to a close tolerance within central bore 13, to minimize or prevent leakage of fluids from bore 13 when the actuator is in the closed position.
  • seals, gaskets or other similar devices may be used to control such leakage.
  • narrowed central section 12A defines, together with the wall of central bore 13, a conduit from entry port 15B to exit port 14B.
  • Central section 12A also defines, together with the wall of central bore 13, a conduit from entry port 15A to exit port 14A.
  • the first and second circulation paths are separated by central section 12A of actuator pin 12 when actuator pin 12 is in the closed position. Because of this, fluids in the first and the second circulation loops circulate separately through mix head 1 without becoming mixed with each other, when actuator pin 12 is in the closed position.
  • actuator pin 12 When mix head 1 is actuated, actuator pin 12 is retracted to the open position shown in Figure 2B. In that position, distal thicker section 12B is raised to a position that is intermediate to entry port 15A and exit port 14A, and intermediate to entry port 15B and exit port 14B. This removes the barrier separating the incoming flows from the respective circulation loops. As a result, fluid can enter central bore 13 through entry ports 15A and 15B, but their access to exit ports 14A and 14B is blocked by distal thicker section 12B of actuator pin 12. Fluids entering central bore 13 from entry points 15A and 15B therefore mix together in central bore 13 and become expelled through outlet 19. Outlet 19 may pour directly into a cavity, or feed a spray nozzle, wand or other apparatus for directing the fluid mixture to a desired location or direction.
  • Figure 1 illustrates a preferred embodiment in which mix head 1 is equipped with a hydraulic actuator system, shown generally as 4.
  • Hydraulic actuator system 4 hydraulically actuates actuator pin 12 between the open and closed positions upon receiving a manual or automated signal to do so.
  • First circulation loop 2 together with the first circulation path in mix head 1, defines a fluid path through which a fluid can be circulated.
  • circulated and its variations, it is meant simply that a fluid travels in a fixed direction through a circulation loop any number of times, sequentially passing each successive point in the loop during each time it is circulated.
  • First circulation loop 2 therefore includes one or more conduit means which, together with the first circulation path in mix head 1, define a closed loop.
  • these conduit means include various pipes, tubes and/or hoses that are indicated generally by reference numerals 21.
  • the various conduit means are of course in fluid communication with each other and with the first circulation path in mix head 1 to define the closed loop.
  • First circulation loop 2 further includes pumping means for pumping a fluid around the first circulation loop.
  • pumping means is indicated generally by reference numeral 22.
  • the location of pumping means 22 within first recirculation loop 2 is not considered to be critical. As shown, pumping means 22 is downstream from heating means 23 and upstream of mix head 1, but pumping means 22 can be located at other positions in first circulation loop 2 if desired. Multiple pumping means can be included with first circulation loop 2.
  • the pumping means in first circulation loop 2 can be of any type that is adapted to the particular flow rates, operating pressures and fluid viscosities encountered in first circulation loop 2.
  • Gear pumps, radial piston pumps, axial piston pumps, screw pumps, rotary pumps, continuous delivery pumps, double ball reciprocating pumps and bent axis pumps may all be suitable. Bent axis pumps are preferred on the basis of their high efficiency.
  • First circulation loop 2 further includes heating means for heating fluid in the first circulation loop to a predetermined temperature before the fluid enters the first circulation path of the mix head.
  • the heating means is shown generally by reference numeral 23. As shown, heating means 23 is located upstream (i.e., in the direction opposite of the fluid flow direction through first circulation loop 2) of pumping means 22, but the relative positions of heating means 23 and pumping means 22 may be reversed from that shown in Figure 1.
  • a preferred type of heater for many applications is a counterflow fluid heat exchanger, which uses a heated waterless thermal fluid to transfer heat to the fluid circulating within first circulation loop 2.
  • Counterflow heat exchangers typically include an inlet and an outlet for each of a heating/cooling fluid and the circulating fluid. The fluids generally do not mix and follow separate flow paths within the heat exchanger.
  • Suitable types of counterflow heat exchangers include flat plate, tube in tube and shell and tube heat exchangers.
  • Shell and tube heat exchangers generally have a series of small tubes within a larger pressure vessel or shell. Heat is transferred between a fluid flowing within the small tubes and another fluid flowing within the shell. In a flat plate heat exchanger, heat is transferred between two fluids flowing in opposite directions along separate flow paths created between a series of parallel plates.
  • the plates are typically made of stainless steel and may contain channels to increase heat transfer efficiency.
  • the plates may be sealed at their joints by using elastomer gaskets or by a brazing process.
  • the large surface area of the plates provides for greater heat transfer efficiency when compared to a shell and tube design.
  • the nominal pressure drop across the heat exchanger is suitably between 1.3 to 1.5 psi at the heated temperature.
  • the maximum flow rate through the heat exchangers is a function of the maximum acceptable pressure drop. Therefore, the maximum flow capacity is dependent upon the pressure drop that is permissible in the system.
  • Flat plate heat exchangers are usually lighter and more compact than shell and tube heat exchangers.
  • the fluid flowing through a flat plate heat exchanger must be in contact with the plates for a sufficient amount of time, meaning that the plates have to be of a certain length. In practice, this requirement limits the applicability of flat plate heat exchangers in this apparatus. Therefore, thermal fluid heaters are preferred mainly on the basis that they tend not to expose the circulating fluids to extremely high temperatures which can cause scorching or other thermal degradation.
  • a flat plate heater or similar type of heater is preferred over mass heaters.
  • the first circulation loop contains an inlet for introducing additional fluid into the first circulation loop.
  • this inlet will include a valve of some type, typically a ball valve or diaphragm valve, which is opened when additional fluid is needed in the circulation loop.
  • additional fluid is introduced into the first circulation loop to replace fluid discharged from the mix head during a "shot", and to replace other amounts of fluid that may be lost due to leakage, the taking of samples for analysis or other purposes, or for similar reasons.
  • the inlet may operate in response to the loss of fluid from the first circulation loop.
  • a valve included within the inlet may be automated to open in response to the operation of the mix head to replace the discharged fluid.
  • Such a valve may open in response to a pressure drop of predetermined magnitude within first circulation loop to replace fluid that is discharged through the mix head or which is otherwise removed from the first circulating loop.
  • the inlet is shown in Figure 1 generally by reference numeral 24.
  • Inlet 24 in the embodiment shown in Figure 1 includes a valve and a conduit which is in fluid communication with the conduits 21 that make up circulation loop 2.
  • the inlet is positioned downstream of the first circulating path of the mixing head 1 and upstream of heating means 23.
  • the inlet is also in fluid communication with a source of the additional fluid, such as a bulk storage unit.
  • the first circulating loop additionally includes a dispersing means in which dispersed fluid entering the loop through the inlet into the fluid that has already been circulating within the first circulating loop.
  • the dispersing means in first circulation loop 2 is indicated generally by reference numeral 25.
  • the dispersal of the additional fluid serves to equilibrate the temperature of the fluid mixture that is formed when the additional fluid enters the first circulating loop during the dispensing of material from the first circulation loop, via the mix head. This permits a more uniform temperature and viscosity to be achieved when the fluid subsequently passes through the heating means which is located downstream of the dispersing means.
  • dispersing means including, for example, various types of static or mechanical mixing devices, as well as various heat exchangers as described above.
  • a preferred type of dispersing means is a disperser tube, which is shown schematically in Figure 3.
  • disperser tube 25 includes vessel 251.
  • Vessel 251 holds a quantity of the recirculating fluid, which is continuously or intermittently being introduced and removed through conduits 21 as the fluid is circulated through circulation loop 2.
  • Inlet 24 is in fluid communication with tube 241, which extends into the interior of vessel 251.
  • tube 241 branches into multiple open-ended tubes 242.
  • Fluid entering first circulation loop 2 via inlet 24 travels through tube 241 and through open-ended tubes 242, entering vessel 251 through openings in open-ended tubes 242 and mixing with the circulating fluid that is flowing through vessel 251.
  • This design permits rapid and uniform mixing of additional fluid with the circulating fluid already in circulation loop 2. This facilitates a rapid equilibration of temperature.
  • First circulation loop further includes sensors, such as pressure, temperature and/or bubble detection sensors 29 in Figure 1.
  • Bubble detection sensors detect the presence of air that may be entrapped in the circulation loop. For example, a repair such as filter replacement, orifice change or of other critical components that require the material lines to be opened may pose a risk of trapping air into the closed loop system, therefore requiring the system to be bled of all air trapped within the circulation loop.
  • the presence of gasses in the circulating loops can be detected visually or through a bubble detection sensor.
  • Other devices that may be present include, for example, other process control monitors and controls.
  • second circulation loop 3 includes one or more conduit means which, together with the first circulation path in mix head 1 and other components, define a closed loop.
  • these conduit means include various pipes, tubes and/or hoses that are indicated generally by reference numerals 31.
  • the various conduit means are of course in fluid communication with each other and with second circulation path in mix head 1 to define the closed loop.
  • Second circulation loop 3 includes pumping means for pumping a fluid around the second circulation loop.
  • pumping means is indicated generally by reference numeral 32.
  • the location of pumping means 32 within second circulation loop 3 is not considered to be critical, and multiple pumping means can be included with second circulation loop 3.
  • pumping means 32 is downstream from heating means 33 and upstream of mix head 1.
  • the specific design of the pumping means in second circulation loop 3 can be of any type that is adapted to the particular flow rates, operating pressures and fluid viscosities encountered in second circulation loop 3, including any of the specific types described before.
  • Second circulation loop 3 further includes heating means for heating fluid in the second circulation loop to a predetermined temperature before the fluid enters the second circulation path of the mix head.
  • the heating means is shown generally by reference numeral 33.
  • heating means 33 is located upstream (i.e., in the direction opposite of the fluid flow direction through second circulation loop 3) of pumping means 32, but the relative positions of heating means 33 and pumping means 32 may be reversed from that shown in Figure 1.
  • a preferred type of heater for many applications is a thermal fluid heater.
  • the second circulation loop contains an inlet for introducing additional fluid into the second circulation loop. The design and operation of such an inlet will generally be as described with respect to the inlet of the first circulation loop.
  • additional fluid generally is introduced to replace fluid discharged from the mix head during a "shot", or to replace other amounts of fluid that may be lost for similar reasons as described before.
  • the inlet may operate in response to the loss of fluid from the second circulation loop, though automation or in response to a pressure drop of predetermined magnitude within the second circulation loop.
  • the inlet is shown in Figure 1 generally by reference numeral 34.
  • Inlet 34 in Figure 1 includes a valve and a conduit which is in fluid communication with the conduits 31 that make up second circulation loop 3.
  • the inlet to second circulation loop 3 is positioned downstream of the first circulating path of mixing head 1 and upstream of heating means 33.
  • the second circulating loop may include a dispersing means such as is described with respect to the first circulation loop.
  • a dispersing means is generally preferred when the viscosity of additional fluid entering second circulation loop 3 and/or that of the circulating fluid are somewhat high, such as about 500 cps or more at the respective temperatures at the time they are mixed.
  • Second circulation loop further includes sensors, such as pressure, temperature and/or bubble detection sensors 39 in Figure 1.
  • sensors such as pressure, temperature and/or bubble detection sensors 39 in Figure 1.
  • Other devices that may be present include, for example, other process control monitors and controls.
  • Fluids are mixed and dispensed using the foregoing apparatus as follows.
  • a first fluid is charged to the first circulation loop of the system and circulated through the first circulation loop (including the first circulation path in the mix head) via operation of the pumping means.
  • a second fluid is charged to the second circulation loop of the system and separately circulated through the second circulation loop (including the second circulation path in the mix head) via operation of the pumping means.
  • the circulating fluids are separately adjusted as necessary to their respective operating temperatures by operation of the heating means on the respective circulation loops. After operating conditions are established within the two circulation loops, the actuator of the mix head is actuated.
  • the first fluid in the first circulation loop is replenished by introducing additional fluid through inlet b-4) of the first circulation loop, dispersing that additional fluid into fluid that is already circulating through the first circulation loop, and then heating the replenished first fluid to the operating temperature by means of heating means b-3).
  • Fluid levels in the second circulation unit are replenished in an analogous manner by introducing additional fluid through inlet c-4), dispersing it within the fluid that is already circulating as necessary, and then heating the replenished second fluid within the second circulation loop by means of heating means c- 3).
  • the replenishment of the fluids in the respective circulation loops may be performed during each "shot", i.e., at the same time each time material is discharged from the mix head, or after each shot.
  • the mixing and dispensing system may further include various optional elements, some of which are illustrated in Figure 1.
  • either or both circulation loops may include one or more flow meters, which measure and/or control flow rates through the respective circulation loops.
  • flow meters are indicated by reference numerals 25 and 35, respectively.
  • the design of such flow meters is not considered to be critical; generally a particular flow meter will be selected in consideration of the expected operating pressures, flow rates and fluid viscosities.
  • Various filters such as filters 26 and 36 in Figure 1, may be present to remove particulate matter from the circulating fluid.
  • Various pressure switches and/or transducers such as pressure switches 27 and 37 may be included to help monitor or control material pressures.
  • Valves such as valves 28 and 38 may be included at various points along each circulation loop. Either or both circulation loops may be equipped with an auto-startup valve (reference numeral 51 in Figure 1) or other diversion valve, which allows flows to be diverted to only a part of the respective loop when necessary or desirable. For example, it may be desirable to by-pass the mix head during start-up, when the circulating fluid may be cold and highly viscous, in order to avoid clogging or fouling the mix head or to simply avoid high operating pressures during start-up.
  • a portion of the circulating fluid can be diverted from the main flow and used as a coolant for the pumping means in the circulation loop.
  • the mixing and dispensing system of the invention is preferably automated, but can also be manually controlled. An automated process often makes it easier control the shot size and to communicate with the registering of data during and after the dispensing of material from circulation loops 2 and 3, though the mix head. It is also possible that the controls of the mixing and dispensing system may be controlled entirely by means of an external control, therefore reducing the floor space and cost of redundant controls, and eliminating interface cables.
  • a computerized process control preferably maintains the flow rates of circulation loop 2 and 3 independently within a tolerance of 0.5 g/s. The flow rate is verified through the use of the flow meters 25 and 35.
  • the temperature of the materials circulating in circulation loops 2 and 3 preferably is controlled within a tolerance of 0.5 °C, preferably to within a tolerance of 0.3°C.
  • the mixing and dispensing system of the invention is useful in a wide range of applications which require two or more fluids to be mixed and dispensed together. It is well-adapted for processing two-part resin systems, in which a resin precursor and a curing agent are mixed and dispensed together. It is especially useful for processing two-part resin systems in which one of the components is significantly more viscous than the other.
  • Two-part resin systems that can be processed with the mixing and dispensing system of the invention are two-part epoxy resins and two-part polyurethane resin systems. Both types of systems are well-known.
  • Two-part epoxy resins systems that can be processed with this invention include those described, for example, in US 5,414,067.
  • Two-part polyurethane systems that can be processed with the mixing and dispensing system of this invention are described, for example, in U. S. Patent Nos. 5,817,860, 6,541,534 and 6,423,755, WO 02/079340A1, WO 03/037948A1.
  • acoustical foams are frequently applied to parts of automobiles and other vehicles in order to reduce the amount of noise and vibration that are transmitted through the part into the passenger compartments of those vehicles.
  • a foamed sealant which may be applied to a cavity in a part of an automobile or other vehicle to prevent fluids or particulates (typically water and dust) from entering and/or escaping from the part.
  • the first type is based on an isocyanate-terminated prepolymer that contains urethane and possibly urea groups.
  • the prepolymer in this instance is the more viscous, higher molecular weight component of the system. Typically, it would be the fluid that circulates in the first recirculation loop of the system of the invention.
  • the second component of this type of system is typically water, or a mixture of water and one or more low molecular weight polyol or polyamine crosslinkers or chain extenders.
  • the second component in this case is generally much lower in viscosity than the prepolymer, and generally would be circulated in the second circulation loop of the system of the invention.
  • Either component may contain additives such as surfactants, catalysts and the like as may be desirable to produce a good quality foam and/or to obtain a suitable curing rate.
  • the second category of polyurethane foam systems is based on a polyol component and a separate isocyanate component.
  • the polyol component is usually the higher viscosity material, and is preferable circulated in the first circulation loop of the system.
  • the polyol component will contain a blowing agent (typically including water), and may contain surfactants, catalyst and the like.
  • the isocyanate component in this case is typically the lower viscosity material, and is preferably circulated in the second circulation loop of the system. In this case, the isocyanate component typically has a low (less than 350) isocyanate equivalent weight.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Accessories For Mixers (AREA)

Abstract

L'invention porte sur un appareil et sur un procédé de mélange et de distribution utiles pour traiter des systèmes de résine polyuréthane ou époxy à deux composants, lesquels comprennent une première boucle de circulation (2) et une deuxième boucle de circulation (3), chacune en communication de fluide avec une tête de mélange du type à circulation (1). La tête de mélange du type à circulation (1) comprend des premier et deuxième trajets de circulation de fluide séparés, une chambre de mélange et de distribution, et un actionneur, qui, lors de l'actionnement, permet à une quantité prédéterminée de fluide venant du premier trajet de circulation et à une quantité prédéterminée de fluide venant du deuxième trajet de circulation d'entrer chacune dans la chambre de mélange et de distribution, de se mélanger et d'être distribuées ensemble hors de la tête de mélange (1).
PCT/US2010/055945 2009-11-24 2010-11-09 Appareil et procédé de mélange et de distribution de fluide Ceased WO2011066095A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US26400709P 2009-11-24 2009-11-24
US61/264,007 2009-11-24

Publications (1)

Publication Number Publication Date
WO2011066095A1 true WO2011066095A1 (fr) 2011-06-03

Family

ID=43501440

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2010/055945 Ceased WO2011066095A1 (fr) 2009-11-24 2010-11-09 Appareil et procédé de mélange et de distribution de fluide

Country Status (1)

Country Link
WO (1) WO2011066095A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3002478A1 (fr) * 2013-02-27 2014-08-29 Ct D Etudes Sur Les Materiaux Composites Avances Pour Les Transports Cemcat Tete de melange et d'injection, comprenant un corps dans lequel s'etendent des conduits d'amenee des composants selon la direction d'injection
EP2808145A1 (fr) * 2013-05-31 2014-12-03 Faurecia Automotive Composites Dispositif et procédé de mélange d'au moins deux matériaux thermoplastiques présentant une viscositée régulée
EP2842710A1 (fr) * 2013-09-03 2015-03-04 Udo Tartler Dispositif de dosage
CN104931719A (zh) * 2014-03-20 2015-09-23 浙江海峰制鞋设备有限公司 一种测速与计量装置及使用该装置的混合系统、混合方法
DE102015116658A1 (de) * 2015-10-01 2017-04-06 Polyplan-GmbH Polyurethan-Maschinen Anordnung zum Aufbringen von Wachs auf Karosseriebauteile eines Fahrzeugs
WO2017172312A1 (fr) 2016-03-29 2017-10-05 Dow Global Technologies Llc Mousse de polyuréthane semi-rigide et son procédé de fabrication
WO2021144743A1 (fr) * 2020-01-15 2021-07-22 Udo Tartler Procédé et dispositif permettant de mélanger et d'acheminer du plastique dans un moule en vue d'une infusion sous vide

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4090695A (en) * 1976-12-16 1978-05-23 Cincinnati Milacron Inc. Liquid feeding control method
US4115066A (en) * 1975-12-08 1978-09-19 The Upjohn Company High pressure mixing head
US4379122A (en) * 1980-02-13 1983-04-05 Krauss-Maffei Aktiengesellschaft Mixing head for reactive components
US4399104A (en) * 1979-09-07 1983-08-16 Bayer Aktiengesellschaft Device for the production of a reaction mixture from flowable foam-forming or solid-forming components
US4966466A (en) * 1987-11-10 1990-10-30 Krauss-Maffei A.G. Impingement mixing device with pressure controlled nozzle adjustment
US5414067A (en) 1994-05-25 1995-05-09 Air Products And Chemicals, Inc. Process for reducing cure time in cycloaliphatic amine based epoxy resins
US5817860A (en) 1998-03-20 1998-10-06 Essex Specialty Products, Inc. Polyurethane prepolymer compositions, foams made therefrom and methods of making each thereof
US6423755B1 (en) 2000-02-25 2002-07-23 Essex Specialty Products, Inc Rigid polyurethane foams
WO2002079340A1 (fr) 2001-04-01 2002-10-10 Dow Global Technologies, Inc. Mousses de polyurethanne rigides
WO2003037948A1 (fr) 2001-10-29 2003-05-08 Dow Global Technologies Inc. Mousses de polyurethane hybrides rigides
EP1447206A1 (fr) * 2003-02-14 2004-08-18 Hennecke GmbH Procédé pour la fabrication de pièces moulées en polyuréthane
DE202007011666U1 (de) * 2007-08-21 2007-11-08 Woitzel, Heinz Vorrichtung zum Mischen von Polyurethan o.dgl. Mehrkomponentenkunststoffen
EP2050797A1 (fr) * 2007-10-15 2009-04-22 Selmat Automotive S.p.A. con Unico Socio Procédé d'application de pulvérisation d'un revêtement de polyuréthane pour produire une surface de charge d'un véhicule

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4115066A (en) * 1975-12-08 1978-09-19 The Upjohn Company High pressure mixing head
US4090695A (en) * 1976-12-16 1978-05-23 Cincinnati Milacron Inc. Liquid feeding control method
US4399104A (en) * 1979-09-07 1983-08-16 Bayer Aktiengesellschaft Device for the production of a reaction mixture from flowable foam-forming or solid-forming components
US4379122A (en) * 1980-02-13 1983-04-05 Krauss-Maffei Aktiengesellschaft Mixing head for reactive components
US4966466A (en) * 1987-11-10 1990-10-30 Krauss-Maffei A.G. Impingement mixing device with pressure controlled nozzle adjustment
US5414067A (en) 1994-05-25 1995-05-09 Air Products And Chemicals, Inc. Process for reducing cure time in cycloaliphatic amine based epoxy resins
US5817860A (en) 1998-03-20 1998-10-06 Essex Specialty Products, Inc. Polyurethane prepolymer compositions, foams made therefrom and methods of making each thereof
US6423755B1 (en) 2000-02-25 2002-07-23 Essex Specialty Products, Inc Rigid polyurethane foams
US6541534B2 (en) 2000-02-25 2003-04-01 Essex Specialty Products, Inc. Rigid polyurethane foams
WO2002079340A1 (fr) 2001-04-01 2002-10-10 Dow Global Technologies, Inc. Mousses de polyurethanne rigides
WO2003037948A1 (fr) 2001-10-29 2003-05-08 Dow Global Technologies Inc. Mousses de polyurethane hybrides rigides
EP1447206A1 (fr) * 2003-02-14 2004-08-18 Hennecke GmbH Procédé pour la fabrication de pièces moulées en polyuréthane
DE202007011666U1 (de) * 2007-08-21 2007-11-08 Woitzel, Heinz Vorrichtung zum Mischen von Polyurethan o.dgl. Mehrkomponentenkunststoffen
EP2050797A1 (fr) * 2007-10-15 2009-04-22 Selmat Automotive S.p.A. con Unico Socio Procédé d'application de pulvérisation d'un revêtement de polyuréthane pour produire une surface de charge d'un véhicule

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3002478A1 (fr) * 2013-02-27 2014-08-29 Ct D Etudes Sur Les Materiaux Composites Avances Pour Les Transports Cemcat Tete de melange et d'injection, comprenant un corps dans lequel s'etendent des conduits d'amenee des composants selon la direction d'injection
EP2808145A1 (fr) * 2013-05-31 2014-12-03 Faurecia Automotive Composites Dispositif et procédé de mélange d'au moins deux matériaux thermoplastiques présentant une viscositée régulée
FR3006230A1 (fr) * 2013-05-31 2014-12-05 Faurecia Automotive Composites Dispositif et procede de melange d'au moins deux materiaux thermoplastiques presentant une viscositee regulee
EP2842710A1 (fr) * 2013-09-03 2015-03-04 Udo Tartler Dispositif de dosage
US9435673B2 (en) 2013-09-03 2016-09-06 Udo Tartler Device for metering of a fluid volumetric flow of a liquid component in a mixer feed line for mixing plastics
CN104931719A (zh) * 2014-03-20 2015-09-23 浙江海峰制鞋设备有限公司 一种测速与计量装置及使用该装置的混合系统、混合方法
CN104931719B (zh) * 2014-03-20 2018-06-08 浙江海峰制鞋设备有限公司 一种多组料的混合系统的混合方法
DE102015116658A1 (de) * 2015-10-01 2017-04-06 Polyplan-GmbH Polyurethan-Maschinen Anordnung zum Aufbringen von Wachs auf Karosseriebauteile eines Fahrzeugs
WO2017172312A1 (fr) 2016-03-29 2017-10-05 Dow Global Technologies Llc Mousse de polyuréthane semi-rigide et son procédé de fabrication
US10975211B2 (en) 2016-03-29 2021-04-13 Dow Global Technologies Llc Semi-rigid polyurethane foam and process to make
WO2021144743A1 (fr) * 2020-01-15 2021-07-22 Udo Tartler Procédé et dispositif permettant de mélanger et d'acheminer du plastique dans un moule en vue d'une infusion sous vide

Similar Documents

Publication Publication Date Title
WO2011066095A1 (fr) Appareil et procédé de mélange et de distribution de fluide
JP7036391B2 (ja) 押出システム及び押出方法
US9056327B2 (en) Modular plural component spray system
CN102046389B (zh) 一种喷墨打印装置
JP2004504930A5 (fr)
CN102149524A (zh) 通过一经热力和气压控制的针对热塑性材料的供料系统获得制剂并实现反应性聚合反应的方法和装置
JP7179878B2 (ja) モジュール式処理システムおよび処理システムのモジュール構築方法
CN101538336A (zh) 搅拌釜式反应器以及在应用这种搅拌釜式反应器的情况下实施聚合反应的方法
US20190054437A1 (en) Mechanisms and Methods for Mixing and/or Dispensing Multipart Materials
US10272458B2 (en) Liquid distribution system and method
CN216152877U (zh) 聚合物材料与发泡剂混合物的挤制系统
EP1772246A2 (fr) Dispositif de régulation de la température d'un moule
JPH11240010A (ja) ポリウレタン成形体を製造するための方法および装置
CN106030230A (zh) 适于热交换和/或物质交换的板机构
WO1982002004A1 (fr) Melangeur a commande thermique, appareil et leurs procedes de fonctionnement
CN113654964B (zh) 水滤芯性能测试系统
JP6960557B2 (ja) 反応プラスチックの製造装置及び製造方法
CA2318193C (fr) Bloc de melange pour melange des composants de systemes de revetement de matieres reactives a composants multiples et appareil faisant appel a ce bloc
CN211941574U (zh) 一种适用于真空浸胶工艺的真空混胶系统
JP3379800B2 (ja) 高圧ウレタン注入装置
HU216177B (hu) Eljárás folyadék tartályban történő tárolására
CN110539416B (zh) 一种水性聚氨酯胶黏剂生产自动调配装置及其涂覆方法
US20090074591A1 (en) High pressure radial pump
KR20110072932A (ko) 연속식 혼합장치를 이용한 재생약액 공급 장치
RU2756088C1 (ru) Установка для смешивания и нанесения защитного состава на внутреннюю поверхность трубопроводов

Legal Events

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

Ref document number: 10779616

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 10779616

Country of ref document: EP

Kind code of ref document: A1