WO2004004879A1 - Mixing head assembly with double-angled injection nozzle - Google Patents

Mixing head assembly with double-angled injection nozzle Download PDF

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Publication number
WO2004004879A1
WO2004004879A1 PCT/KR2002/001254 KR0201254W WO2004004879A1 WO 2004004879 A1 WO2004004879 A1 WO 2004004879A1 KR 0201254 W KR0201254 W KR 0201254W WO 2004004879 A1 WO2004004879 A1 WO 2004004879A1
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WO
WIPO (PCT)
Prior art keywords
head assembly
mixing head
mixing
piston
mixing chamber
Prior art date
Application number
PCT/KR2002/001254
Other languages
French (fr)
Inventor
Yong Chae Jeong
Original Assignee
Yong Chae Jeong
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 Yong Chae Jeong filed Critical Yong Chae Jeong
Priority to PCT/KR2002/001254 priority Critical patent/WO2004004879A1/en
Publication of WO2004004879A1 publication Critical patent/WO2004004879A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
    • B01J3/02—Feed or outlet devices therefor
    • 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
    • B01F25/105—Mixing heads, i.e. compact mixing units or modules, using mixing valves for feeding and mixing at least two components
    • 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
    • B01F25/20—Jet mixers, i.e. mixers using high-speed fluid streams
    • B01F25/23—Mixing by intersecting jets
    • 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
    • B01F35/10—Maintenance of mixers
    • B01F35/145—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means
    • B01F35/1452—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means using fluids
    • B01F35/1453—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means using fluids by means of jets of fluid, e.g. air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/26—Nozzle-type reactors, i.e. the distribution of the initial reactants within the reactor is effected by their introduction or injection through nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
    • B01J3/002—Component parts of these vessels not mentioned in B01J3/004, B01J3/006, B01J3/02 - B01J3/08; Measures taken in conjunction with the process to be carried out, e.g. safety measures
    • 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
    • B29B7/7631—Parts; Accessories
    • B29B7/7636—Construction of the feed orifices, bores, ports
    • 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
    • B29B7/7631—Parts; Accessories
    • B29B7/7636—Construction of the feed orifices, bores, ports
    • B29B7/7642—Adjustable feed orifices, e.g. for controlling the rate of feeding
    • 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
    • B29B7/7668—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 having a second tube intersecting the first one with the jets impinging in the second 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
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049—Controlling or regulating processes
    • B01J2219/00245—Avoiding undesirable reactions or side-effects
    • B01J2219/00247—Fouling of the reactor or the process equipment
    • 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
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/22—Component parts, details or accessories; Auxiliary operations
    • B29C39/24—Feeding the material into the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material

Definitions

  • the present invention relates to a mixing head assembly for a polyurethane bubbler, by which polyol and isocynanate are injected at high pressure into a mixing chamber, and after they are homogeneously mixed by swirl and turbulence, the mixture passes through a throttle to cause a laminar flow in an outlet pipe, and is introduced into a molding, thereby manufacturing high quality of polyurethane foam.
  • Polyurethane Foam a method for manufacturing polyurethane foam, commonly referred to as Structural Reaction Injection Molding (SRIM), Reinforce Reaction Injection Molding (RRIM), Flexible Foam or Ridged Foam which all of these manufacturing processes forth coming throughout this document will be referred to as "Polyurethane Foam” is classified into a low pressure foaming process and a high pressure foaming process. According to the former, after reactive components are introduced at a low pressure into a mixing chamber through a nozzle, the components are mixed by the high-speed rotation of an impeller, and are introduced into a molding. Due to the economical and environmental factor such as cleaning, mixture loss, inferior working condition, bad quality or the like, the process has been replaced with the high-pressure foaming process.
  • SRIM Structural Reaction Injection Molding
  • RRIM Reinforce Reaction Injection Molding
  • Flexible Foam or Ridged Foam which all of these manufacturing processes forth coming throughout this document will be referred to as "Polyurethane Foam” is classified
  • the reactive components are injected at a high pressure by the nozzle, so that the components are mixed by the impingement force, and are introduced into the molding.
  • the system for performing the high pressure foaming process comprises a dual tanks, a dual pumps, a mixing head assembly, a driving hydraulic unit, and an electronic control unit, the mixing head assembly introduces and mix the reactive components which is a major part for determining the quality of the final foam product.
  • the present invention is directed to a high-pressure mixing head assembly that substantially eliminates one or more problems due to limitations and disadvantages of the related art.
  • the object of the present invention is to provide a high pressure mixing head assembly with a double-angled injection process, capable of manufacturing a high quality polyurethane foam part with the unique mixing process.
  • a driving hydraulic unit and an electronic control unit
  • the mixing head asembly comprising injecting nozzles for polyol and isocyanate which are disposed in the assembly with a double-declined angle.
  • Means for feeding a release agent is provided on a cleaning piston and a mixing chamber piston, and low frictional elastic scraper are provided on the cleaning piston and the mixing chamber piston to prevent the components from being leaked.
  • Fig. 1 is a schematic, longitudinal cross sectional view of a mixing head assembly according to this invention.
  • Fig. 2 is a semi-schematic, detail 20 of Fig.1, showing the flow characteristics of reactive components in the mixing head assembly of this invention in Fig. 1.
  • FIG. 3 is a semi-schematic, cross sectional view along the line 13-13 of Fig. 1 showing the first angled injectors of the proposed inventions.
  • Fig. 4 is a semi-schematic, cross sectional view along the line 14-14 of Fig. 3 showing the second angled injectors of the proposed inventions.
  • Fig. 5 is a semi-schematic, cross sectional view showing a typical mixing head in the present assembly. Fig. 5 is compared with Fig. 3 of this invention.
  • FIGs. 6A and 6B are semi-schematic, dross sectional views illustrating a typical vertical and horizontal flow of reactive components in the present mixing head assembly of Fig. 5.
  • Fig. 6A is compared with Fig. 2 and Fig. 6B is compared with Fig. 4 of this invention.
  • a mixing head assembly according to the present invention is connected to a hydraulic tank and polyol and isocyanate feed lines, if a pump of the hydraulic tank is operated, as indicated in Fig. 1 a cleaning piston 6 is retracted and then a mixing chamber piston 3 is also retracted, so that a mixing chamber 5 is defined by the cleaning piston 6 and the mixing chamber piston 3. At that time, a double-angled injection nozzle 4 is opened to inject polyol and isocyanate at high pressure of 120 to 200 bar into the mixing chamber 5.
  • the polyol and isocyanate are injected into the mixing chamber 5 in the form of opposing and impinging jets, the polyol and isocyanate impinge primarily on each other (indicated as "A” in Fig. 2, 3 and 4), and then impinge secondarily on a wall of the mixing chamber 5 (indicated as "B” in Fig. 2, 3 and 4), thereby forming a first swirl due to the impinging energy.
  • the mixture consisting of the polyol and the isocyanate is passed in the form of turbulence through a nozzle orifice to form a second swirl.
  • the mixture is optimally mixed within the mixed chamber 5 by the throttle resistance defined by the cleaning piston 5.
  • the mixture is passed through the throttle (indicated as "C” in Fig. 1 and 2) to form a laminar flow, and then is introduced into the mold, after a predetermined amount of the mixture is introduced into the mold, the mixing chamber piston 3 extends, then the cleaning piston 6 is extended, thereby completing the pouring process of the two mixed components from the mixing head into the mold.
  • the present invention is characterized in that the injection nozzles 4 for polyol and isocyanate are formed at a double-inclined angle.
  • the high pressure injection of the polyol and isocyanate causes the first and second impingement, thereby very easily forming the swirl and turbulence.
  • the swirl and turbulence are formed within the entire space of the mixing chamber, so that the components are mixed at a maximum condition to improve the quality of the polyurethane foam.
  • a throttle-regulating unit 7 is attached to a cylinder cover 8, and the throttle "C", in Fig.
  • Fig. 1 in addition, in order to prevent the cleaning piston 6 and the mixing chamber piston 3 from being adhered to a housing 1, a passage 10 for feeding a release agent is provided in the housing 1. Low frictional elastic scrapers 12-1, 12-2, and 12-3 are provided on the cleaning piston 6, the mixing chamber piston 3 and the housing 1.
  • the present invention improves the mixing efficiency within the mixing chamber 5 of the mixing head assembly by employing the swirl and turbulence produced due to the strong impingement of the polyol and the isocyanate.
  • the mixing efficiency can be regulated by the throttle-regulating unit 7 of the cleaning piston 6 to further improve the mixing efficiency.
  • the smooth laminar flow is obtained in the discharging pipe 2, thereby manufacturing the high quality of polyurethane foam.
  • the release agent filled in a spacer tube 9 is supplied to the cleaning piston 6 and the mixing chamber piston 3 through the passage 10 due to its load, thereby forming a release agent film on the surface of the cleaning piston 6 and mixing chamber piston 3 and so preventing the mixture being adhered on the surface.
  • the scrapers 12-1, 12-2 and 12-3 provide a sealing function and a bearing function on the cleaning piston 6 and the mixing chamber piston 3, thereby cleansing the worksite and preventing the loss of the reactive components.

Abstract

A mixing head assembly comprising injecting nozzles for polyol and isocyanate which are disposed in the assembly at a double-tilted angle is disclosed. A passage for feeding a release agent is provided on a cleaning piston and a mixing chamber piston, and low frictional plastic scrapers are provided on the cleaning piston and the mixing chamber piston to prevent the components from being leaked out of the main body.

Description

MIXING HEAD ASSEMBLY WITH DOUBLE-ANGLED INJECTION NOZZLE
BACKGROUND OF THE INVENTION
Field of the Invention
(01) The present invention relates to a mixing head assembly for a polyurethane bubbler, by which polyol and isocynanate are injected at high pressure into a mixing chamber, and after they are homogeneously mixed by swirl and turbulence, the mixture passes through a throttle to cause a laminar flow in an outlet pipe, and is introduced into a molding, thereby manufacturing high quality of polyurethane foam.
Background of the Related Art
(02) Generally, a method for manufacturing polyurethane foam, commonly referred to as Structural Reaction Injection Molding (SRIM), Reinforce Reaction Injection Molding (RRIM), Flexible Foam or Ridged Foam which all of these manufacturing processes forth coming throughout this document will be referred to as "Polyurethane Foam" is classified into a low pressure foaming process and a high pressure foaming process. According to the former, after reactive components are introduced at a low pressure into a mixing chamber through a nozzle, the components are mixed by the high-speed rotation of an impeller, and are introduced into a molding. Due to the economical and environmental factor such as cleaning, mixture loss, inferior working condition, bad quality or the like, the process has been replaced with the high-pressure foaming process. Meanwhile, according to the high pressure foaming process, the reactive components are injected at a high pressure by the nozzle, so that the components are mixed by the impingement force, and are introduced into the molding. The system for performing the high pressure foaming process comprises a dual tanks, a dual pumps, a mixing head assembly, a driving hydraulic unit, and an electronic control unit, the mixing head assembly introduces and mix the reactive components which is a major part for determining the quality of the final foam product.
(03) The typical mixing head assemblies inject the reactive components in a horizontal or vertical direction, thereby deteriorating the mixing efficiency. Therefore, several methods have been proposed for improving the mixing efficiency and laminar flow
- i - at a discharging port by providing a swirl inducing chamber or an additional device. However, since the typical mixing head has a complicated construction, there are some drawbacks such as difficulty of the maintenance, expensiveness, shortening of life cycle.
SUMMARY OF THE INVENTION
(04) Accordingly, the present invention is directed to a high-pressure mixing head assembly that substantially eliminates one or more problems due to limitations and disadvantages of the related art.
(05) The object of the present invention is to provide a high pressure mixing head assembly with a double-angled injection process, capable of manufacturing a high quality polyurethane foam part with the unique mixing process.
(06) To achieve the object and othter advantages, in accordance with the purpose of the invention, as embodied and broadly described herein, there is provided a driving hydraulic unit, and an electronic control unit, the mixing head asembly comprising injecting nozzles for polyol and isocyanate which are disposed in the assembly with a double-declined angle. Means for feeding a release agent is provided on a cleaning piston and a mixing chamber piston, and low frictional elastic scraper are provided on the cleaning piston and the mixing chamber piston to prevent the components from being leaked.
BRIEF DESCRIPTION OF THE DRAWINGS
(07) The accompanying drawing, which are included to provide a further understanding of the invention and are incorporated in and cunstitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the principle of the invention. In the drawings:
(08) Fig. 1 is a schematic, longitudinal cross sectional view of a mixing head assembly according to this invention. (09) Fig. 2 is a semi-schematic, detail 20 of Fig.1, showing the flow characteristics of reactive components in the mixing head assembly of this invention in Fig. 1.
(10) Fig. 3 is a semi-schematic, cross sectional view along the line 13-13 of Fig. 1 showing the first angled injectors of the proposed inventions.
(11) Fig. 4 is a semi-schematic, cross sectional view along the line 14-14 of Fig. 3 showing the second angled injectors of the proposed inventions.
(12) Fig. 5 is a semi-schematic, cross sectional view showing a typical mixing head in the present assembly. Fig. 5 is compared with Fig. 3 of this invention.
(13) Figs. 6A and 6B are semi-schematic, dross sectional views illustrating a typical vertical and horizontal flow of reactive components in the present mixing head assembly of Fig. 5. Fig. 6A is compared with Fig. 2 and Fig. 6B is compared with Fig. 4 of this invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
(14) Reference will now be made in detail to the preferred embodiment of the present invention, an example of which is illustrated in the accompanying drawings.
(15) In case that a mixing head assembly according to the present invention is connected to a hydraulic tank and polyol and isocyanate feed lines, if a pump of the hydraulic tank is operated, as indicated in Fig. 1 a cleaning piston 6 is retracted and then a mixing chamber piston 3 is also retracted, so that a mixing chamber 5 is defined by the cleaning piston 6 and the mixing chamber piston 3. At that time, a double-angled injection nozzle 4 is opened to inject polyol and isocyanate at high pressure of 120 to 200 bar into the mixing chamber 5.
(16) Since the polyol and isocyanate are injected into the mixing chamber 5 in the form of opposing and impinging jets, the polyol and isocyanate impinge primarily on each other (indicated as "A" in Fig. 2, 3 and 4), and then impinge secondarily on a wall of the mixing chamber 5 (indicated as "B" in Fig. 2, 3 and 4), thereby forming a first swirl due to the impinging energy. The mixture consisting of the polyol and the isocyanate is passed in the form of turbulence through a nozzle orifice to form a second swirl. The mixture is optimally mixed within the mixed chamber 5 by the throttle resistance defined by the cleaning piston 5. The mixture is passed through the throttle (indicated as "C" in Fig. 1 and 2) to form a laminar flow, and then is introduced into the mold, after a predetermined amount of the mixture is introduced into the mold, the mixing chamber piston 3 extends, then the cleaning piston 6 is extended, thereby completing the pouring process of the two mixed components from the mixing head into the mold.
(17) In order to improve the mixing efficiency when the mixing head, Fig. 1, injects the polyol and isocyanate at high pressure, the present invention is characterized in that the injection nozzles 4 for polyol and isocyanate are formed at a double-inclined angle. With the construction, the high pressure injection of the polyol and isocyanate causes the first and second impingement, thereby very easily forming the swirl and turbulence. The swirl and turbulence are formed within the entire space of the mixing chamber, so that the components are mixed at a maximum condition to improve the quality of the polyurethane foam. In addition, a throttle-regulating unit 7 is attached to a cylinder cover 8, and the throttle "C", in Fig. 1 and 2), is defined in the mixing chamber by the cleaning piston 6. The swirl and turbulence are actively formed in the mixing chamber by this resistance of the throttle. The mixture passed through the throttle "C" is passed in the form of laminar flow in the discharging pipe 2 as indicated in Fig. 1.
(18) Fig. 1 in addition, in order to prevent the cleaning piston 6 and the mixing chamber piston 3 from being adhered to a housing 1, a passage 10 for feeding a release agent is provided in the housing 1. Low frictional elastic scrapers 12-1, 12-2, and 12-3 are provided on the cleaning piston 6, the mixing chamber piston 3 and the housing 1.
(19) With the construction, the present invention improves the mixing efficiency within the mixing chamber 5 of the mixing head assembly by employing the swirl and turbulence produced due to the strong impingement of the polyol and the isocyanate. In addition, the mixing efficiency can be regulated by the throttle-regulating unit 7 of the cleaning piston 6 to further improve the mixing efficiency. The smooth laminar flow is obtained in the discharging pipe 2, thereby manufacturing the high quality of polyurethane foam.
(20) The release agent filled in a spacer tube 9 is supplied to the cleaning piston 6 and the mixing chamber piston 3 through the passage 10 due to its load, thereby forming a release agent film on the surface of the cleaning piston 6 and mixing chamber piston 3 and so preventing the mixture being adhered on the surface. The scrapers 12-1, 12-2 and 12-3 provide a sealing function and a bearing function on the cleaning piston 6 and the mixing chamber piston 3, thereby cleansing the worksite and preventing the loss of the reactive components.
(21) The forgoing embodiment is merely an example and is not to be construed as limiting the present invention. The present teachings can be readily applied to other types of apparatuses. The description of the present invention is intended to be illustrative, and not to limit the scope of the claims. Many alternatives, modifications, and variations will be apparent to those skilled in the art.

Claims

What is claimed is:
1. A polyurethane foam system, includes chemical tanks for storing reactive components, chemical pumps, mixing tank assemblies, a driving hydraulic unit, and an electronic control unit, the mixing head assembly, comprising of injecting nozzles for polyol and isocyanate which are oriented in the mixing head assembly with a double-angled injection nozzle.
2. The mixing head assembly as in claim 1, wherein means for feeding a release agent is provided onto a cleaning piston and a mixing chamber piston, and low frictional elastic scrapers are provided on the cleaning piston and the mixing chamber piston to prevent the components from causing these rods to become stuck in their bores.
3. The mixing head assembly as in claim 1, wherein a cylinder cover of a mixing head includes a throttle-regulating unit to regulate a surface area of a throttle.
PCT/KR2002/001254 2002-07-03 2002-07-03 Mixing head assembly with double-angled injection nozzle WO2004004879A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/KR2002/001254 WO2004004879A1 (en) 2002-07-03 2002-07-03 Mixing head assembly with double-angled injection nozzle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2002/001254 WO2004004879A1 (en) 2002-07-03 2002-07-03 Mixing head assembly with double-angled injection nozzle

Publications (1)

Publication Number Publication Date
WO2004004879A1 true WO2004004879A1 (en) 2004-01-15

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007096383A1 (en) * 2006-02-21 2007-08-30 Sachtleben Chemie Gmbh Method for carrying out chemical and physical processes and reaction cells
EP1992466A2 (en) 2007-05-18 2008-11-19 FRIMO Group GmbH Method and device for producing a polyurethane from two initial components under high pressure
DE102014001461A1 (en) 2014-02-05 2015-08-06 Hennecke Gmbh Process for producing a molded part from polyurethane
CN105235274A (en) * 2015-08-21 2016-01-13 南通艾迈特机械有限公司 Improved material injecting device

Citations (9)

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Publication number Priority date Publication date Assignee Title
US4452919A (en) * 1979-04-13 1984-06-05 Schneider Fritz W High velocity mixing method
US4477191A (en) * 1982-05-06 1984-10-16 Bayer Aktiengesellschaft Mixing head for mixing at least two flowable components
US4503014A (en) * 1982-02-26 1985-03-05 Krauss-Maffei Ag Mixing head
US4510120A (en) * 1981-11-12 1985-04-09 Krauss-Maffei Aktiengesellschaft Mixing head
US4592657A (en) * 1983-09-02 1986-06-03 Elastogran Maschinenbau Gmbh Mixing head for producing a preferably chemically reactive mixture of two or more plastics components
JPS6392415A (en) * 1986-10-08 1988-04-22 Nippon Plast Co Ltd Mixing head for reaction injection molding
US5785422A (en) * 1995-04-24 1998-07-28 Krauss-Maffei Ag Piston arrangement for removing a reactive plastic mixture from a stabilizing chamber of a mixing device
KR200170956Y1 (en) * 1997-09-11 2000-03-02 정용채 Polyurethane high pressure foaming mixing head
KR20010084127A (en) * 2000-02-23 2001-09-06 정용채 High efficiency·high press injection head bundle

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4452919A (en) * 1979-04-13 1984-06-05 Schneider Fritz W High velocity mixing method
US4510120A (en) * 1981-11-12 1985-04-09 Krauss-Maffei Aktiengesellschaft Mixing head
US4503014A (en) * 1982-02-26 1985-03-05 Krauss-Maffei Ag Mixing head
US4477191A (en) * 1982-05-06 1984-10-16 Bayer Aktiengesellschaft Mixing head for mixing at least two flowable components
US4592657A (en) * 1983-09-02 1986-06-03 Elastogran Maschinenbau Gmbh Mixing head for producing a preferably chemically reactive mixture of two or more plastics components
JPS6392415A (en) * 1986-10-08 1988-04-22 Nippon Plast Co Ltd Mixing head for reaction injection molding
US5785422A (en) * 1995-04-24 1998-07-28 Krauss-Maffei Ag Piston arrangement for removing a reactive plastic mixture from a stabilizing chamber of a mixing device
KR200170956Y1 (en) * 1997-09-11 2000-03-02 정용채 Polyurethane high pressure foaming mixing head
KR20010084127A (en) * 2000-02-23 2001-09-06 정용채 High efficiency·high press injection head bundle

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007096383A1 (en) * 2006-02-21 2007-08-30 Sachtleben Chemie Gmbh Method for carrying out chemical and physical processes and reaction cells
EP1992466A2 (en) 2007-05-18 2008-11-19 FRIMO Group GmbH Method and device for producing a polyurethane from two initial components under high pressure
DE102007023239A1 (en) 2007-05-18 2008-11-20 Frimo Group Gmbh mixing head
EP1992466A3 (en) * 2007-05-18 2009-06-03 FRIMO Group GmbH Method and device for producing a polyurethane from two initial components under high pressure
DE102007023239B4 (en) * 2007-05-18 2010-03-11 Frimo Group Gmbh Method and device for producing a polyurethane from at least two liquid starting components
DE102014001461A1 (en) 2014-02-05 2015-08-06 Hennecke Gmbh Process for producing a molded part from polyurethane
CN105235274A (en) * 2015-08-21 2016-01-13 南通艾迈特机械有限公司 Improved material injecting device

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