EP1555071B1 - Method for mixing and device for fill level adjustment of pasty multi-component materials in containers - Google Patents

Description

The invention relates to a mixing method and a device for level control in containers to be mixed pasty multicomponent materials.

Multi-component materials for automix systems are offered in tubular bag films or double cartridges. All components must have the same volume or, in the case of mixing ratios deviating from 1: 1, the same fill level, so that the correct ratio of the components is discharged during the application.

In general, the individual components are passed through a mixing attachment (hereafter referred to as a "mixer") with a static or dynamic mixer before being fed to the application and later cured. Such mixing attachments are usually placed on the discharge device or the metering device for the cartridges or tubular bag. US Pat. Nos. 6,352,177 and 5,788,122 disclose such devices and methods.

Since it is not possible for technical reasons, always set exactly the same level when filling the cartridges / bag, it comes at the first application of materials usually overdosing one of the components.

The resulting incorrectly metered mixture then remains even during the further promotion and mixing partially still in the mixer and is delayed. The material with the wrong mixing ratio often does not harden and must therefore be disposed of in pasty form, which can lead to contamination. As a result, relatively large quantities of material often have to be discarded. One manages with the fact that the components are squeezed out until the user thinks according to his experience that a functioning hardening mixture has arisen. This can lead to further increased material loss.

The object was to develop a device which is used to bring all individual filled with components to be mixed chambers of the container to an equal level before the multi-component material is promoted by a static or dynamic mixing essay aufzusetzten then, and is inexpensive to produce and causes little loss of material and as little pollution.

The object is achieved by a hollow attachment according to claim 1, in which the components - to be mixed without - are discharged until the level of the component container is the same. The attachment is, as well as the mixer, detachably attachable to the dosing device. Material is transported into the attachment until both components can be conveyed. For this purpose, the essay is advantageously transparent.

The material to be discarded is then inside the device cavity. Thereafter, the hollow article is discarded with the discharged material and replaced by the functional mixing attachment.

• A) separaten Behältern für die einzelnen Komponenten mit je einer Öffnung;
• B) Austrag- bzw. Dosiervorrichtung zum Fördern der Komponenten aus den Öffnungen;
• C) einem statischen oder dynamischem Mischaufsatz zum Aufsetzen auf die Dosiervorrichtung so, daß er mit den Öffnungen der Behälter verbunden ist und die Komponenten ihn durchströmen können;
  wobei die erfindungsgemäße Vorrichtung
• D) einen hohlen Aufsatz ohne Mischfunktion- mit separaten Einlassöffnungen (2,3) für jede Komponente darstellt, der mindestens einen Hohlraum (4,5) sowie Mittel zum Aufsetzen auf die Dosiervorrichtung B) an der Stelle (2,3) aufweist, wo das Aufsetzen des statischen oder dynamischen Mischers C) vorgesehen ist.

The invention thus relates to a device D) for level control in containers with pasty multicomponent materials to be mixed as an additive to a mixing arrangement with

• A) separate containers for the individual components, each with an opening;
• B) Discharge or dosing device for conveying the components from the openings;
• C) a static or dynamic mixing attachment for placing on the dosing device so that it is connected to the openings of the container and the components can flow through it;
  wherein the device according to the invention
• D) a hollow attachment without Mischfunktion- with separate inlet openings (2,3) for each component, which has at least one cavity (4,5) and means for placing on the metering device B) at the point (2,3), where the placement of the static or dynamic mixer C) is provided.

Conveniently, the empty housing of the mixing attachment without the otherwise existing mixing element can be used as a hollow attachment. This part already has the necessary attachment device for attachment to the discharge. It is possible to make the outlet opening closable with a lid or to equip it with a valve. In this way, a clean recording and disposal of the discharged material is guaranteed.

The means for placing on the metering device may e.g. Screw thread or plug, latch or bayonet joints, as they are familiar to the expert.

• Fig. 1 zeigt den hohlen Aufsatz mit einem Hohlraum 4
• Fig. 2 zeigt den hohlen Aufsatz mit zwei Hohlräumen 5.

The invention will be explained with reference to the figures as follows:

• Fig. 1 shows the hollow top with a cavity. 4
• 2 shows the hollow attachment with two cavities 5.

The material flow flows through the openings 2,3 into the cavities until all components are conveyed visibly and thus the intended mixing ratio is reached. The components can be passed into a common cavity 4 or into separate cavities 5. Subsequently, the hollow attachment is removed and replaced by the mixer.

The invention also relates to a method for mixing pasty Mehrkomponentenmateralien in predetermined proportions, wherein the flow, in which the proportions of the components are outside the intended range, in a separate hollow essay - with at least one cavity 4.5 - for placement on the metering device at the point where the placement of the static or dynamic mixer is provided, collected and disposed of therein.

• a) die oben beschriebene Vorrichtung D) an der Stelle (2,3), wo das Aufsetzen des statischen oder dynamischen Mischers vorgesehen ist, an der Austrag- oder Dosiervorrichtung B) angebracht wird,
• b) die Austrag- oder Dosiervorrichtung B) betätigt wird,
• c) der Vorlauf, bei dem die Mengenverhältnisse außerhalb des vorgesehenen Bereichs liegen, in der Vorrichtung D) aufgefangen wird,
• d) die Vorrichtung D) abgenommen und entsorgt wird, und anschließend

der Mischaufsatz C) aufgesetzt und die Komponenten gemischt werden.The process steps can be described so that

• a) the above-described device D) at the point (2,3) where the placement of the static or dynamic mixer is provided, is attached to the discharge or metering device B),
• b) the discharge or metering device B) is actuated,
• c) the feed, in which the proportions are outside the intended range, is collected in the device D),
• d) the device D) is removed and disposed of, and then

the mixing cap C) are placed and the components are mixed.

It is possible, in addition, to make the openings 1,2,3 of the device closable in order to avoid contamination entirely.

Advantages of the solution according to the invention are in particular the reduction of the waste volume and the cleaner handling of the waste.

The device according to the invention can be used for all multicomponent systems in which conveyed, metered and at the same time mixed or homogenized by means of a static or dynamic mixer attachment.

Claims (3)

1. Device D) for filling level control in containers containing paste-like multiple-component materials that are to be mixed, to be added to a mixing arrangement comprising:

   A) separate containers for the various individual components, each with its own opening;

   B) a discharging or dosing device for delivering said components out of said openings;

   C) a static or dynamic mixing attachment to be attached onto the dosing device such that it is connected to the openings of the containers and allows the components to flow through it;

   characterized in that the device D) represents a hollow attachment without mixing function and with separate inlet openings (2, 3) for each component, said attachment comprising at least one hollow space (4, 5) as well as means for being attached onto the dosing device B) at the place (2, 3) that is provided for attaching the static or dynamic mixer C).
2. Method for mixing paste-like multiple-component materials at predefined quantity ratios with use being made of a device D) according to Claim 1, characterized in that the first flow comprising quantity ratios outside of the range provided is collected in the device D) and disposed of therein.
3. Method for mixing paste-like multiple-component materials at predefined quantity ratios with use being made of a mixing arrangement according to Claim 1, characterized in that

   a) a device D) according to Claim 1 is attached to the discharging or dosing device B) at the place (2, 3) that is provided for attaching the static or dynamic mixer;

   b) the discharging or dosing device B) is actuated;

   c) the first flow comprising quantity ratios outside of the range provided is collected in the device D);

   d) the device D) is removed and disposed of; and subsequently

   e) the mixing attachment C) is attached and the components are mixed.

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