Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
  • B01F35/80—Forming a predetermined ratio of the substances to be mixed
  • B01F35/88—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise
  • B01F35/882—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise using measuring chambers, e.g. volumetric pumps, for feeding the substances
  • B01F35/8823—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise using measuring chambers, e.g. volumetric pumps, for feeding the substances using diaphragms or bellows
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
  • B01F35/80—Forming a predetermined ratio of the substances to be mixed
  • B01F35/88—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise
  • B01F35/882—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise using measuring chambers, e.g. volumetric pumps, for feeding the substances

Definitions

• the invention relates to a metering and tinting system for viscous media, in particular for paints and colored plastics according to the preamble of the main claim.
• Dosing or tinting systems for colors are known, with which a mixed color predefined in accordance with a customer request can be mixed from a plurality of basic colors.
• the dosing and tinting system has a mixing vessel in which the desired color is mixed together.
• metering valves are arranged, which are connected via hose lines to containers for the basic colors, which are usually made of plastic.
• a diaphragm pump is assigned to each hose line to convey the basic colors to the metering valves and from these back into the containers.
• the mixing vessel is arranged on a scale, by means of which the quantity dosed is measured.
• the scale, the metering valves and the diaphragm pumps are connected to a control device, which can be designed as a computer, for example, and which controls the components depending on a specified recipe and the signals specified by the scale.
• the color residues remaining in the containers are problematic in the known tinting systems, since the pumps can only deliver up to a certain amount.
• the colors stick to the walls and dry.
• a circulating or stirring device is provided in the container, which can be driven by a motor, drying of the paint residues cannot avoid this. Circulation is also carried out via the hose lines, but this method is also complex.
• the return lines must be placed in a collecting container, so that additional contamination occurs.
• the invention has for its object to provide a mixing plant that has a smaller apparatus Effort required and which minimizes the paint residues and thus significantly reduces cleaning and disposal costs.
• the containers for the admixing medium for example for the primary colors, are provided with a piston-like movable partition, which is sealed against the container wall and thus divides the container into two chambers, the admixing medium being received in one chamber and the other chamber is pressurized with a pressure medium, the admixing medium can be expressed through the pressurized partition into the delivery line to the metering valve.
• the container wall is simultaneously cleaned of adhering medium through the partition wall, so that the volume for the pressure medium, which increases in volume during the squeezing out of the admixing medium, is essentially free of admixing medium. In this way, the entire admixing medium can be pressed out of the container so that no residues remain.
• the containers can be exchanged in a few simple steps. Different container sizes can be used for the tinting colors, and the size can be selected depending on the frequency of tinting with the color in the system, so that all containers for the admixing or tinting media can be changed at the same time.
• the containers can also be used as transport containers by the manufacturer of the admixing media, which eliminates the need to dispose of the delivery container.
• the containers are made of a solid material, such as metal, and can be used as a reusable container, which further reduces the environmental impact and complies with the circular economy law. Due to the special way of ejecting the medium, usually from bottom to top when the container is standing vertically, the medium does not come into contact with oxygen, so that even with partially empty containers, intermediate storage is possible without the need for a special cover or circulation.
• the single figure shows schematically the metering and tinting system according to the invention.
• the dosing and tinting system according to the invention is used to produce colored media with different viscosities and grain sizes, in particular for materials of different bindings, such as paints based on dispersions, lacquers or silicates, plasters based on dispersions, lacquers or silicates, adhesives and fillers and Materials of similar provinces.
• 1 denotes a dispersing or mixing vessel, which is arranged on an electrical or electronic balance 2.
• the scale is connected to a control device 3, which can be designed, for example, as a personal computer.
• An operating display 4 with an input device is preferably provided in the vicinity of the scale.
• the control device 3 is connected to a printer 5 or another recording device.
• a plurality of containers 6 for primary colors are provided, of which only one is shown in the figure.
• the containers 6 are preferably vertical and their outlet 7 is in each case provided with a conveying device, for example a hose line. line 8 connected.
• the respective delivery line 8 is connected to a pneumatic metering valve 9 for a coarse and a fine flow.
• These metering valves 9 for the individual primary colors are arranged in the vicinity of the mixing vessel 1, their outlet preferably being directed directly in the direction of the mixing vessel 1.
• the metering valves 9 are also controlled by solenoid valves 10 for a coarse and a fine flow.
• the solenoid valves are connected on the one hand to the control device 3 and on the other hand to an air line 11, the respective air lines 11 being connected to one or more pressure sources.
• the respective container 6 for the admixing medium for example for primary colors, is preferably cylindrical in shape with smooth walls and consists, for example, of stainless steel and is closed with a cover 12 which has the outlet 7 for connection to the delivery line 8.
• a partition 13 is arranged inside the container 6 and is arranged near the bottom 14 (see dashed line) when the container 6 is full.
• the partition 13 has on its periphery an elastic ring 15 serving as a sealing lip.
• a connection for a compressed air line 16 is provided below the partition 13, that is to say on the bottom 14 of the container 6, the compressed air line 16 being connected to the compressed air source or to a compressed air source in each case.
• a shutoff valve 17 is connected between the outlet 7 of the container 6 and the delivery line 8.
• the control device 3 controls the respective valves for the pressure medium air and the solenoid and metering valves 9, 10 either via a corresponding program or manually.
• pressurized air is introduced via the compressed air line 16 into one of the containers 6, as a result of which the dividing wall 13 is moved upward, and the medium is pressed via the outlet 7 and the delivery line 8 to the metering valve 9, in accordance with the prescribed recipe dosed, the first being a rough dosing and then a fine dosing.
• the weight of the mixture in the mixing vessel 1 is detected by the scale 2 and passed to the control device 3, whereby the dosage can be verified or regulated.
• Two chambers are formed in the respective containers 6, an upper chamber 18, which contains the admixing medium or the primary color, and a lower chamber 19, which receives the pressure medium, that is to say the air, with increasing emptying.
• the annular sealing lip 15 slides along the wall of the container 6, so that the lower chamber 19 is essentially free of admixing medium.
• the mixing vessel 1 can also be designed as a container corresponding to the container 6, but the partition is in its starting position, that is to say on the bottom 14, during mixing and is only of the possibility of being used later
• the compressed air line is not connected to the outside of the bottom of the container 6, but is guided through the outlet 7 and through the partition 13 into the lower chamber 19.
• the compressed air line 16 must be displaceable and scrapers must be available for removing the admixing medium.
• admixing media are described in the above exemplary embodiment as color pastes, but it is also possible to use cleaning pastes, grains or ground powders as admixing media.
• the dosing and tinting system can be part of a production line for the production of colored media, for example colored dispersion paints, which a bucket unstacking unit, in which nested empty buckets are separated from one another and placed on a transport device, for example a roller conveyor, a labeling unit for marking the Bucket, a dosing unit for the tinting goods, for example white emulsion paint, in which the white goods are dosed into the empty buckets, for example from a container of the appropriate size according to the invention, one or more dosing stations, in which different ones, in the above described containers with pressurized Partitions of colored pastes are metered into the white goods, a lid placement and container closing unit for closing the buckets with the white pastes provided with colored pastes, one or more mixing stations in which the buckets are shaken or rotated so that the contents are mixed.
• the buckets are passed from one station to another on the roller conveyor and are finally stacked on a pallet by a robot, the entire process being controlled by the control
• air is used as the pressure medium, of course, other gases can be selected, and the use of hydraulic fluids is also conceivable.

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Accessories For Mixers (AREA)
• Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
• Coating Apparatus (AREA)
• Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=7816462

Family Applications (1)

Country Status (4)

Cited By (1)

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• 1996
  • 1996-12-23 DE DE19654829A patent/DE19654829A1/de not_active Withdrawn
• 1997
  • 1997-12-15 WO PCT/DE1997/002971 patent/WO1998028069A1/fr active IP Right Grant
  • 1997-12-15 AT AT97952740T patent/ATE194781T1/de not_active IP Right Cessation
  • 1997-12-15 EP EP97952740A patent/EP0946274B1/fr not_active Expired - Lifetime
  • 1997-12-15 DE DE59702073T patent/DE59702073D1/de not_active Expired - Fee Related

Non-Patent Citations (1)

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