# US 11,897,168 B2 · Mixing device with a pressure holding device

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- Number: US 11,897,168 B2
- Document ID: US11897168B2
- Status: Granted
- Kind: B2
- Application number: 15/735,408
- Filed: 2016-06-24
- Published: 2018-06-28
- Granted: 2024-02-13
- Earliest claimed: 2015-07-03
- Assignees: Henkel AG & Co. KGaA
- Applicants: Henkel AG & Co. KGaA
- Inventors: Christian Schwabl; Guenther Baldauf; Mario Metzler
- Web page: https://patentgrep.com/patent/US11897168B2

## CPC

- B29B 7/7657: {Adjustable discharge orifices, openings or nozzle openings, e.g. for controlling the rate of dispensing}
- B29B 7/401: {having a casing closely surrounding the rotor, e.g. with a plunger for feeding the material (B29B7/407, B29B7/42 take precedence)}
- B29B 7/407: {with a casing closely surrounding the rotor, e.g. with conical rotor}
- B29B 7/582: {for discharging, e.g. doors}
- B29B 7/726: {Measuring properties of mixture, e.g. temperature or density (B29B7/724 takes precedence)}
- B29B 7/7414: {with rotatable stirrer, e.g. using an intermeshing rotor-stator system (B29B7/7423 takes precedence)}
- B29B 7/86: for working at sub- or superatmospheric pressure {(B01F33/70 takes precedence)}
- C08G 18/42: Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G 18/4244: {containing oxygen in the form of ether groups}
- C08G 18/48: Polyethers
- C08G 18/73: acyclic
- C08G 18/74: cyclic
- C08J 3/24: Crosslinking, e.g. vulcanising, of macromolecules (mechanical aspects B29C35/00; crosslinking agents C08K)
- B29K 2105/04: cellular or porous
- B29K 2105/24: crosslinked or vulcanised
- C08G 2101/00: Manufacture of cellular products
- C08G 2115/02: to isocyanurate groups
- C08J 9/30: by mixing gases into liquid compositions or plastisols, e.g. frothing with air
- C08J 2201/022: premixing or pre-blending a part of the components of a foamable composition, e.g. premixing the polyol with the blowing agent, surfactant and catalyst and only adding the isocyanate at the time of foaming
- C08J 2203/06: CO2, N2 or noble gases
- C08J 2331/02: Characterised by the use of omopolymers or copolymers of esters of monocarboxylic acids
- C08J 2333/04: esters
- C08J 2363/00: Characterised by the use of epoxy resins; Derivatives of epoxy resins
- C08J 2367/00: Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J 2375/04: Polyurethanes
- C08J 2383/04: Polysiloxanes
- 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
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- 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

## Abstract

The invention relates to a mixing device comprising at least one supply opening for at least one liquid and comprising at least one additional supply opening for at least one liquid curing or crosslinking agent. The liquid and/or the liquid curing or crosslinking agent is/are mixed with a gas. The mixing device also comprises a discharge opening for discharging a mixture, which can be produced in the mixing device, of the at least one liquid and the at least one liquid curing or crosslinking agent. A pressure holding device is provided for holding a specifiable pressure which is higher than the pressure at which the gas in the mixing device is foamed.

## Claims

### Claim 1

A mixing device comprising:
at least one feed opening for at least one liquid;
at least one further feed opening for at least one liquid curing or cross-linking agent, wherein the at least one liquid and/or the at least one liquid curing or cross-linking agent is or are mixed with a gas;
a discharge opening for discharge of a mixture which can be produced in the mixing device and comprises the at least one liquid and the at least one liquid curing or cross-linking agent; and
a pressure holding device for holding a predeterminable pressure which is greater than a pressure at which foaming-out of the gas in the mixing device occurs,
wherein the pressure holding device includes an adjusting member arranged displaceably in the mixing device relative to the discharge opening, the adjusting member being configured to adjust a gap remaining between the adjusting member and the discharge opening, wherein the mixing device has a rotating agitator for mixing the at least one liquid and the at least one liquid curing or cross-linking agent, wherein the adjusting member is biased in a direction of the discharge opening by a force storage member, and wherein the agitator is adapted to be displaceable and forms the adjusting member, and
wherein the force storage member is in the form of a spring.

### Claim 2

A mixing device comprising:
at least one feed opening for at least one liquid;
at least one further feed opening for at least one liquid curing or cross-linking agent, wherein the at least one liquid and/or the at least one liquid curing or cross-linking agent is or are mixed with a gas;
a discharge opening for discharge of a mixture which can be produced in the mixing device and comprises the at least one liquid and the at least one liquid curing or cross-linking agent; and
a pressure holding device for holding a predeterminable pressure which is greater than a pressure at which foaming-out of the gas in the mixing device occurs, wherein the pressure holding device includes an adjusting member arranged displaceably in the mixing device relative to the discharge opening, the adjusting member being configured to adjust a gap remaining between the adjusting member and the discharge opening, wherein the mixing device has a rotating agitator for mixing the at least one liquid and the at least one liquid curing or cross-linking agent, wherein the adjusting member is biased in a direction of the discharge opening by a force storage member, and wherein the agitator is adapted to be displaceable and forms the adjusting member,
wherein the mixing device further comprises a mixing chamber, the mixing chamber having the discharge opening, the agitator being arranged within the mixing chamber, and
wherein the agitator is configured to be displaced by a force of the at least one liquid and the at least one liquid curing or cross-linking agent in the mixing chamber applied directly to the agitator in a direction away from the discharge opening such that the force directly displaces the agitator away from the discharge opening so as to allow the mixture to be discharged through the discharge opening, and such that the force directly determines a size of the gap.