Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
  • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
  • D06F39/02—Devices for adding soap or other washing agents
  • D06F39/022—Devices for adding soap or other washing agents in a liquid state

Definitions

• the present invention relates to a paste container with a removal device, which is particularly suitable for removing structurally viscous pastes, in particular highly viscous detergent pastes used in commercial laundries.
• Paste-like detergents are used in particular in commercial laundries, where they have the advantages of powder detergents, in particular a high active ingredient content, bypassing the disadvantages of liquid detergents, in particular the water or solvent content. Disadvantages of pasty detergents can be packaging and metering problems.
• a detergent container with a metering device is disclosed in German patent application DE-A-37 19906.
• the storage container for the pasty detergent is a container with rigid outer walls and a circular or square cross section, which is equipped on one side with a movable, tightly closing plate (follower plate). Due to its weight, the follower plate exerts pressure on the surface of the paste and causes the detergent paste to be removed via the removal device, which can be a simple pipeline with a pump. As the amount of paste decreases, the follower plate slowly follows the paste level down.
• the device described in DE-A-37 19 906 can also be equipped with a mixing device which simultaneously mixes water added to the metering device with the detergent paste and thus produces an aqueous, liquid concentrate which is fed to the individual washing machines can.
• a detergent container with a metering device for pasty detergents is also disclosed in German patent application DE-A-3826 110.
• This device consists of a cylindrical detergent container, which has an opening on both sides. One opening is closed with a plate arranged inside the container, which in the direction the container axis is displaceable.
• the container opening located opposite this displaceable plate carries a releasable connecting element with which it can be attached or coupled to the metering device.
• the connected metering device has a pressure stamp which acts on the displaceable plate of the paste container and drives it forward when the paste is removed.
• the devices described above are only suitable for pastes whose viscosity is relatively low, in particular around 75000 mPa-s to 90000 mPa-s.
• Pastes with higher viscosities of about 150,000 mPa «s to 250,000 mPa.s are described with conventional dosing as they play for Bei ⁇ above, poorly or not at all pumpable, with the result that upon removal of pastes with high viscosity no good residual emptying is possible.
• the object of the present invention is accordingly to provide a paste container with a removal device, which makes it possible, even under normal circumstances, to remove highly viscous pastes continuously via a removal and conveying device and to achieve a high degree of residual emptying of the paste container .
• the present invention relates to a paste container with removal device, consisting of a cylinder (7) open on one side and a movable, tightly closing follower plate (2) arranged on the open side of the cylinder and a removal device (1) for removal and to transport the paste, whereby
• the removal device (1) is connected to the follower plate (2) outside the center thereof and above the area covered by the stirring propeller (4) and the paste is transported to its application, optionally via a metering device.
• the paste container according to the invention with a removal device is particularly suitable for highly viscous, structurally viscous pastes. Structurally viscous pastes have the property that they liquefy when subjected to mechanical forces such as, for example, stirring, shaking or under the influence of ultrasound, but solidify again after the mechanical stress has ceased. This means that the viscosity of these substances decreases under the influence of increasing shear stress or shear rate. Pastes are particularly suitable which have a viscosity of more than 100,000 Pa at 25 ° C.
• Such pastes are, for example, the detergents in paste form obtainable according to the unpublished German patent application P 4332843.0 of Hen ⁇ kel KGaA.
• a paste container according to the invention is therefore preferably used to convey or remove such structurally viscous detergent pastes.
• the cylindrical paste container is closed on its open top with a movable, tightly closing plate which can be displaced within the container in the direction of the container axis.
• the displaceable plate should largely seal the container wall in accordance with the respective paste level in such a way that the paste is prevented from escaping in this area, that is to say the displacement advantageously takes place with slight friction on the container wall.
• the plate is usually flat.
• the sealing is improved by fitting the plate as precisely as possible.
• its edge is expediently bent outward in the form of a collar, that is to say the plate is designed as a flat piston.
• the plate is preferably provided with a plastic seal at its edges.
• a motor with a gear on the axis of which, which expediently coincides with the axis of the cylindrical container, is below the plate in rieh a multi-bladed stirring propeller is attached to the center of the container.
• This stirring propeller is arranged in such a way that it can rotate freely just below the follower plate.
• the distance of the stirring propeller from the follower plate is preferably as small as possible, since with the propeller blades the underside of the plate can be freed of paste at the same time, that is to say cleaned, which leads to a reduction in undesired residues on the plate. Too large a distance would result in the motor needing too much energy to shear the paste.
• the distance of the stirring propeller from the plate is preferably 0.8 mm to 5 mm, in particular 1 mm to 3 mm.
• the stirring propeller has at least two blades.
• the blades of the stirring propeller can be the same length or have different lengths.
• the agitating propeller preferably has four blades, it being further preferred that the opposing blades have the same length.
• a four-bladed stirring propeller is used, which has two opposing blades that are long enough to cover the entire diameter of the cylindrical container.
• the other two wings are only so long that the ends extend to the removal device which is also located on the plate.
• Such an embodiment is particularly advantageous when using structurally viscous pastes, since it enables the two long wings to shear and thus liquefy the highly viscous paste, while the two short wings can convey the paste to the pump.
• the blades of the stirring propeller usually have the shape of a flat, rectangular bar or a round rod. They are usually arranged parallel to the plate. In one possible embodiment, the blades are arranged at an angle of 90 ° to 60 ° to the propeller axis. This angle is preferably 89 ° to 65 °. It is not necessary that all wings have the same angle to the movable plate. In the case of a strip-like design, the propeller blades can also be slightly inclined. This angle of attack is preferably between 5 and 45 °.
• the hub of the stirring propeller is designed such that it closes off the axis of the stirring propeller as a bulge.
• This curvature can be used as a central spacer to the bottom of the container, so that there is no excessive friction when it contacts the bottom of the container.
• the motor with gear used is used to drive the stirring propeller.
• the strength of the motor depends on the desired speed of the stirring propeller and the viscosity of the pseudoplastic paste used.
• the speed of rotation of the stirring propeller is usually 5 to 180 rpm, preferably 15 to 180 rpm, in particular 45 to 90 rpm.
• An excessively high speed is disadvantageous since the paste then liquefies strongly and can escape at the edges of the plate. If the speed is too low, the paste will not liquefy sufficiently and continuous removal will be impaired.
• the plate While the paste is being removed from the container, the plate slowly lowers in accordance with the paste level. If the hub of the stirring propeller reaches the bottom of the container, the stirring propeller can be rotated further for a while, since the movement of the blades makes it easier for the paste to flow from the edge areas of the container to the center and to be removed. An emptying down to residues of less than 1% is easily possible using the device according to the invention.
• the removal device is connected to the follower plate outside its center.
• the removal device is preferably an eccentric screw pump, gear pump, peristaltic pump or an injector.
• the paste can be fed directly into its use in a conventional manner via corresponding, consumption-controlled distribution devices.
• the container and the plate and the removal device are expediently made of a corrosion-resistant material, such as plastic, metal or glass. In the interest of adequate fit, the container should remain largely dimensionally stable when used.
• the size of the containers is not critical, but the content should expediently be sufficient for several hours of operation in order to minimize the packaging and operating effort.
• Paste containers of this type usually have a volume of at least 0.2 l. When used as a paste container for detergents for commercial use, the volume of the containers is normally of the order of 200 liters.
• a possible embodiment of the paste container according to the invention with a removal device is shown in the attached figure.
• the highly viscous paste 6 is located in a cylindrical container 7 which is open at the top.
• the open side of the cylinder 7 is closed with the round plate 2 arranged inside the container 7.
• the plate 2 is bent outward in the form of a collar and sealed with a plastic seal 5.
• the plate 2 lies on the paste mirror and follows it downward as the paste is removed.
• In the middle of the follower plate 2 there is a motor 3a with a gear 3, on the axis of which there is a multi-bladed stirring propeller 4.
• the axis ends in a hub 8 which is curved slightly downwards.
• the wings are all the same length and extend over the entire diameter of the cylinder. These long wings also cause the paste to be wiped off the cylinder wall, i.e.
• the stirring propeller 4 can rotate freely under the follower plate 2. If structurally viscous pastes of such a high viscosity are used that the removal device is unable to convey them without shearing, the propeller blades shear the upper layer of the paste, which lowers its viscosity in such a way that the paste can be metered.
• a removal device 1 in the form of an eccentric screw pump is attached outside the center of the plate 2. The paste is sheared and its viscosity is reduced, if necessary via appropriate distributors and / or dosing devices. directions, their application, for example, a commercial car wash.

Applications Claiming Priority (3)

Publications (2)

Family

ID=6498742

Family Applications (1)

Country Status (13)

Cited By (1)

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Family Cites Families (13)

• 1993
  • 1993-09-27 DE DE4332850A patent/DE4332850A1/de not_active Withdrawn
• 1994
  • 1994-09-19 DE DE59407710T patent/DE59407710D1/de not_active Expired - Fee Related
  • 1994-09-19 US US08/619,739 patent/US5785210A/en not_active Expired - Lifetime
  • 1994-09-19 AT AT94927652T patent/ATE176013T1/de not_active IP Right Cessation
  • 1994-09-19 PL PL94313709A patent/PL174994B1/pl not_active IP Right Cessation
  • 1994-09-19 ES ES94927652T patent/ES2130445T3/es not_active Expired - Lifetime
  • 1994-09-19 WO PCT/EP1994/003211 patent/WO1995009263A1/fr active IP Right Grant
  • 1994-09-19 JP JP7510109A patent/JPH09502952A/ja active Pending
  • 1994-09-19 EP EP94927652A patent/EP0721521B1/fr not_active Expired - Lifetime
  • 1994-09-19 CA CA002172797A patent/CA2172797C/fr not_active Expired - Lifetime
  • 1994-09-19 DK DK94927652T patent/DK0721521T3/da active
  • 1994-09-19 HU HU9503612A patent/HU216587B/hu not_active IP Right Cessation
• 1996
  • 1996-01-29 NO NO960366A patent/NO180171C/no unknown
  • 1996-03-25 FI FI961358A patent/FI109033B/fi active

Non-Patent Citations (1)

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