EP2718201A1 - Set of multicomponent cartridges - Google Patents

Abstract

The invention relates to a set of multicomponent cartridges having at least two multicomponent cartridges (2), wherein each multicomponent cartridge (2) comprises at least a first and a second receiving chamber (3, 4) for components to be discharged, wherein each receiving chamber (3, 4) is configured substantially cylindrically and extends in a longitudinal direction (A), wherein the receiving chambers (3, 4) are arranged parallel to one another and have the same extent (L) in the longitudinal direction (A), wherein each multicomponent cartridge (2) is produced in one piece, so that the receiving chambers (3, 4) thereof are non-detachably connected to one another, and wherein the first receiving chamber (3) of each multicomponent cartridge (2) of the set (1) has the same external diameter (D1).

Description

 Set of multi-component cartridges

The invention relates to a set of multi-component cartridges with at least two multi-component cartridges according to the preamble of the independent claim. Multi-component cartridges and in particular

 Two-component cartridges are often used for storing and discharging multi-component or two-component systems, in which the individual components should first come into contact with one another for the respective application, in order then to harden, for example. For this purpose, two or more separate receiving chambers are provided, each of which includes one of the components. For the application then the outlets of the receiving chambers

typically connected to a static mixer and the

Components are conveyed by pressurizing the rear bottom of the respective receiving chamber, which is usually designed as a movable piston, through the outlet into the mixer, where the

Components are intimately mixed, and then exit at the end of the mixer as a homogeneous mass.

Such multi-component or two-component systems are used in the industrial sector, in construction, for example, of buildings, and also in the

Dental area used. Some examples are

Joint sealants, compounds for chemical dowels or chemical anchors, adhesives, pastes or molding compounds in the dental field. Especially in the industrial sector, two-component systems are also used for paints used, for example, as a functional protective layers, such as corrosion protection, are used. This will be the two

Components of the colors are mixed in a static mixer and fed to a spray nozzle, which atomizes the mixed components by exposure to a medium such as compressed air and transported to the surface to be treated. In addition to spraying such

Coatings it is also known to apply protective layers or coatings in general by brushing, spreading or filling.

Usually, these multi-component cartridges are made of plastic and are produced in an injection molding process. Especially with the two-component cartridges, it is common today, this as

design so-called side-by-side cartridges, where the two side by side in the essential cylindrical receiving chambers

are arranged axially parallel. For the most economical

Manufacturing process, the two-component cartridges are produced in one piece in a one-step injection molding process, so that the two receiving chambers are permanently connected to each other.

To discharge the components from the multicomponent cartridges special discharge devices are used, which are also referred to as dispensers. These discharge devices are designed such that the multi-component cartridges are inserted into specially adapted holders of the discharge device. For the delivery of the

Components are then provided plungers, which pressurize the bottom of the receiving chamber forming piston, whereby the pistons are moved along the wall of the respective receiving chamber and thereby the component through the outlet

for example, in the mixer. Depending on the system, the drive of the plunger can be done manually, for example via a handle whose

Operation by means of a translation leads to a forward movement of the plunger. Frequently, however, the discharge devices also electrically or pneumatically or hydraulically driven ram, by a

Actuator can be activated by the user to start the discharge of the components. Depending on the application, the two or more components must be mixed in different volume ratios with each other in order to optimally achieve the desired reaction during mixing. The different volume ratios are realized over different volumes of the receiving chambers. Since it is advantageous in practical terms and for the interaction with the discharge, the two or more receiving chambers of the

Multi-component cartridge designed with the same length, so that the plunger of the discharge always synchronous and Gesamthaft

can be moved forward. The different volume ratios are then determined by different cross-sectional areas of

Recording chambers realized. For example, if you want to be at one

Two-component system achieve a mixing ratio of the two components of 2: 1, so with the same length of the two receiving chambers, the first receiving chamber is designed with a twice as large cross-sectional area as the second receiving chamber.

It has long been established in practice that the

Multicomponent systems and in particular the two-component systems of various standardized sizes, i. Filling quantities, are offered, wherein as a filling always the total amount of both or all receiving chambers is specified. For example, for a two-component cartridge, the "1500 ml" designation means that the total fill volume of both containment chambers is 1500 ml, resulting in 1500 ml two-component cartridges for different mixing ratios of the components

Dimensions vary greatly. For example, for a mixing ratio of one to one, the volume of each holding chamber is 750 ml, while for a mixing ratio of the components of two to one, the first

The first chamber contains 1000 ml and the second chamber 500 ml. At a mixing ratio of four to one, the first chamber has a volume of 1200 ml while the second chamber has a volume of 300 ml. Since, as already mentioned, the length of the receiving chambers should be the same for practical reasons, the outer diameter of both receiving chambers inevitably results in the realization

different mixing ratios must be changed. This has to Result that also different discharge devices must be provided, because the multi-component cartridge must be in the

Be discharged discharge safely and stably, so that the piston can be acted upon with sufficient pressure. Based on this prior art, it is therefore an object of the invention to propose a set of multi-component cartridges, with the different mixing ratios can be realized and is universally usable than known systems.

The object of this invention is achieved by the

Characteristics of the independent claim characterized.

Thus, according to the invention, a set of multicomponent cartridges with at least two multicomponent cartridges is proposed, each multicomponent cartridge having at least a first and a second

A receiving chamber for components to be discharged comprises, wherein each receiving chamber is substantially cylindrical and extends in a longitudinal direction, wherein the receiving chambers are arranged parallel to each other and have the same extent in the longitudinal direction, each multi-component cartridge is made in one piece, so that their receiving chambers are permanently connected to each other , and wherein the first receiving chamber of each multi-component cartridge of the set has the same outer diameter.

By the measure, in the set of multi-component cartridges to make each the outer diameter of the first receiving chamber with the same outer diameter, resulting in a clear

more universal applicability of the multi-component cartridge. Because the

 Multi-component cartridge is also designed in one piece, so that their receiving chambers are permanently connected to each other, it is sufficient if in the discharge each only one of the receiving chambers is accurately recorded in a holder. Since for the whole set of multi-component cartridges the outside diameter of the first

 Recording chamber is always the same, it is possible that all

Multi-component cartridges of the set with the same Discharge device can be discharged. There is no need for different discharge devices when

Multi-component cartridges to be discharged with different mixing ratios. This means a much more universal and flexible use of the inventive set of

 Multi-component cartridges than in previously known systems.

It is particularly preferred if each first receiving chamber has the same volume. This means that in the case of the various multi-component cartridges of one set, the wall thickness of the first receiving chamber and thus also its inner diameter are equal. This has the advantageous effect that the number of different pistons that need to be made available for the multi-component cartridges can be significantly reduced.

In a preferred embodiment, each multi-component cartridge is a two-component cartridge, because this application is a very important in practice.

It is particularly favorable if each multicomponent cartridge is produced by means of an injection molding process. This procedure is

economical, very efficient and has proven itself for multi-component cartridges.

An advantageous measure is when each receiving chamber has a separate outlet through which the component can be discharged from the respective receiving chamber. The fact that the outlets are completely separate from each other can at least reduce the risk of cross-contamination between the outlets. If the various components already come into contact with each other at the outlets, this could already lead to hardening, causing the outlets to become clogged.

Especially advantageous for the application, if at every

Multi-component cartridge all outlets in a common

Are arranged connecting piece, which cooperate with a Accessory, in particular with a cap or with a

Mixer, is designed. Through this common connector, the multi-component cartridge can be operated very easily.

A preferred measure is when the connector has a thread for cooperation with the accessory, because this ensures a secure connection. But there are also other variants feasible, with which the connector with a cap or a mixer is connectable.

Another equally preferred measure is when the

Connector has a bayonet coupling for cooperation with the accessory. Then the connector for a

Bayonet be configured with an accessory such as a mixer or a cap. Such a bayonet connection between the multi-component cartridge and a mixer or cap, which is prior art in itself, is a reliable and very easy-to-use connection.

Preferably, a chamber forming the bottom of the chamber piston is provided for each receiving chamber, with which by pressurizing the

Component from the respective receiving chamber can be brought out. This embodiment has proven itself in practice.

Because of practical experience, it is preferred if the set comprises a multi-component cartridge in which the volume of the first receiving chamber is the same size as the volume of the second

A receiving chamber, and / or a multi-component cartridge, wherein the ratio of the volume of the first receiving chamber to the volume of the second receiving chamber is two to one, and / or a multi-component cartridge, wherein the ratio of the volume of the first receiving chamber to the volume of the second receiving chamber three to one is, and / or a multi-component cartridge in which the ratio of the volume of the first receiving chamber to the volume of the second receiving chamber is four to one.

Further advantageous measures and embodiments of the invention will become apparent from the dependent claims.

In the following the invention will be explained in more detail by means of embodiments and with reference to the drawing. In the drawing, partly in section: FIG. 1 shows an exemplary embodiment of a set according to the invention of FIG

 Multi-component cartridges in a perspective

 Representation, the sentence of Fig. 1 in a view,

Fig. 3: The sentence of Fig. 2 in a view of the bottom of

 Multi-component cartridges, and

Fig. 4: one of the multicomponent cartridges of the Sates in one

 Longitudinal view,

Fig. 1 shows in a perspective view an embodiment of an inventive set of multi-component cartridges, which is designated overall by the reference numeral 1 and four here

Multi-component cartridges 2 comprises.

In the following, with an exemplary character reference is made to the case of application, which is particularly relevant for practice, that the

Multi-component cartridges 2 are two-component cartridges 2, respectively. It is understood, however, that the invention is not limited to such embodiments, but in an analogous manner also

Multi-component cartridges 2 may comprise more than two components. Fig. 2 shows the sentence 1 of Fig. 1 in a view from the viewing direction, which is shown in Fig. 1 with the arrow II.

3 shows a view of the bottom of the multicomponent cartridges 2, that is to say a view from the viewing direction, which is shown in FIG. 3 by the arrow III.

For a better understanding Fig. 4 shows one of

 Multi-component cartridges 2 in a longitudinal section along the longitudinal direction A.

Each of the two-component cartridges 2 includes a first one

Receiving chamber 3 for a first component and a second

 Receiving chamber 4 for the second component. Each of the receiving chambers 3, 4 is of substantially cylindrical design and extends in a longitudinal direction A, which corresponds to the cylinder axis. Both

Two-component cartridges 2 of the first sentence are so-called side-by-side cartridges, that is, the two receiving chambers 3.4 of the two-component cartridge 2 are arranged side by side, so that their cylinder axes, each extending in the direction of the longitudinal direction A, are parallel to each other. The length L of the first receiving chamber 3 is the same as the length L of the second receiving chamber 4, wherein with the length L, the extension of the respective receiving chamber 3, 4 in

Longitudinal direction A is meant.

It is preferable, but not necessarily so, for all

Multi-component cartridges 2 of the set 1 the length L is always the same. Although in each multi-component cartridge 2, the two

Receiving chambers 3.4 always the same length L, but it is quite possible that this length L for different multi-component cartridges 2 of the same set 1 is different.

The first and the second receiving chamber 3 and 4 each have a separate outlet 31 or 41 (see FIG. 4), which in each case in the representation of the upper end face of the cylindrical

Receiving chamber 3.4 is provided, and through which the respective Component from the receiving chamber is dischargeable. Each outlet 31, 41 has a circular cross section and is channel-shaped.

Each two-component cartridge 2 has a common

Connecting piece 5, which connects the two provided with the outlets 31, 41 end faces of the receiving chambers. In this

Connector 5, the outlets 31 and 41 are arranged. The

common connector 5 is designed for cooperation with an accessory.

In the embodiment described here, each is

Multi-component cartridge shown with a cap 6, which cooperates with the connecting part 5. The cap 6 has two pins 61, each of which engages in one of the two outlets 31, 41 in order to close them. The cap 6 has a screw 62, which cooperates with a thread of the connecting piece 5. Each of the two-component cartridges 2 is made in one piece, so that their receiving chambers 3,4 are each connected to each other inseparably, that is, the two receiving chambers 3, 4 can not be separated from each other without destroying each other. The two storage chambers 3, 4 are connected to one another via a plurality of parts, namely by the common connecting piece 5 on its end side having the outlets 31, 41, by a connecting web 7 (see FIG. 3) at the end of the receiving chambers 3, 4 facing away from the outlets as well as several

Zwischenstege 8 (see Fig. 4) which the cylindrical walls of the receiving chambers 3,4 at different heights with respect to

Connect longitudinal direction A together.

Each two-component cartridge 2 is preferably in one

Injection molding produced. Since the two-component cartridges 2 are integral, they can be manufactured in a simple and cost-effective manner in a one-step injection molding process. The multicomponent cartridges 2 are made of plastic, whereby all plastics commonly used for cartridges are suitable, For example, polyamides (PA), polypropylene (PP), polyethylene (PE), polybutylene terephthalate (PBT), or polyolefins in general.

As can be seen in particular in FIGS. 3 and 4, the

Two-component cartridges 2 each with an inserted piston 9 in each receiving chamber 3, 4 shown. This piston 9 is produced separately from the two-component cartridge 2 and is usually used only after the filling of the receiving chambers 3, 4. The

Two-component cartridges 2 are therefore initially in

Injection molding produced and then, for example, with the

Cap 6 at the outlets 31, 41 closed. From the still open representation according to the lower end of the receiving chambers 3, 4, the respective components are then filled into the first and the second receiving chamber 3 and 4 respectively. Subsequently, in each case a piston 9 is inserted into the receiving chamber 3 or 4, which then forms the respective chamber bottom and the receiving chamber 3, 4 sealingly closes. Frequently, the piston 9 are designed as a valve piston, so that when

Insertion of the piston 9, the possibly present between the component and the piston air in a simple manner can be discharged.

To use the two-component cartridge 2, this is usually inserted into the holder of a discharge device (dispenser). The

Cap 6 is removed, unscrewed here, and in its place a mixer is attached to the common connector, in this case with a screw. Frequently, this mixer is a known static mixer, which then has two separate inlets, each with one of the outlets 31, 41 form a flow connection, so that the respective component from the receiving chamber 3 and 4 through the outlet 31 and 41 in gets the mixer. Here, the two components meet and are intimately mixed as they pass through the mixer. For discharging the components, the discharge device

Usually a double ram or two individual plunger, which act on the two pistons 9 in the first and the second receiving chamber 3 bzw.4 with pressure, as shown in Fig. 4 by the two arrows is indicated by the reference P. As a result of the application of pressure, the two pistons 9 simultaneously slide upward along the inner wall of the first and second receiving chambers 3 and 4, respectively, whereby the respective components are discharged into the mixer. After completion of the application, the mixer can be removed again and replaced by the cap 6.

The connection of the common connector 5 with the

Of course, cap 6 or with the mixer can also be made in other ways than with a screw connection, for example by means of a bayonet connection. Then, the connector 5 in a conventional manner a bayonet coupling provided with a on the cap 6 or the mixer or other accessory

Bayonet coupling cooperates such that the two parts are securely connected. The inventive sentence 1 of multi-component cartridges 2 is characterized in particular by the fact that in each of the at least two

Multi-component cartridges 2, the first receiving chamber 3 has the same outer diameter D1. This measure will

can be realized that all multi-component cartridges 2 of sentence 1 can be inserted into the same dispenser. Because namely the

Multi-component cartridges 2 are one piece, so the two

Recording chambers 3 and 4 star are connected to each other - here by the connector 5, the connecting web 7 and the intermediate webs 8 - it is sufficient that the holder is designed in the dispensing device so that it receives the first receiving chamber 3 safe and firm. Of the

 Outer diameter D2 of the second receiving chamber 4 can then vary, without thereby the safe and reliable discharge function is compromised.

For manufacturing reasons, it is preferred that each first receiving chamber 3 of a set 1 has the same volume. This means for the same length L, that the wall thickness d of the wall of the first receiving chamber 3 for all multi-component cartridges 2 of the set 1 is the same. However, it is also possible and for some Applications may be desirable that the wall thickness d of the wall of the first receiving chamber 3 for two different

Multi-component cartridges 2 belonging to the same set 1 have different values. If all the first receiving chambers 3 have the same wall thickness d, then they also have the same inner diameter. This is particularly advantageous, because then the same piston 9 can be used for all first receiving chambers 3, for the first receiving chambers 3 then no piston 9 must be provided with different diameters. By the variation of the outside diameter D2 of the second

 Recording chamber 4, it is thus possible to realize different mixing ratios for the two components. It is meant by the mixing ratio how many parts of the first component come to a part of the second component. A mixing ratio of 2: 1 means, for example, that part of the second component has two parts of the first component, parts being parts by volume.

Since the two receiving chambers 3, 4 of the two-component cartridge 2 are the same length and when discharging the two components, the two pistons 9 in the receiving chambers 3.4 are usually pushed synchronously and parallel forward, the mixing ratio can be on the

Set the diameter D2 of the second receiving chamber 4. The

Mixing ratio is then given by the ratio of the two

Circular cross-sectional areas of the two receiving chambers 3.4 are each perpendicular to the longitudinal direction A. Are the wall thicknesses d of the first and second receiving chamber 3 and 4 equal - which is usually the case - so the mixing ratio by the ratio of the outer diameter D1 of the first Receiving chamber 3 to the outer diameter D2 of the second receiving chamber 4 set. Even with not the same wall thickness d of the two receiving chambers 3.4, this statement applies at least

approximately. In the sentence 1 shown in Fig. 1 are in the four

Two-component cartridges 2 according to the illustration from left to right, the following mixing ratios realized: 1: 1; 2: 1; 3: 1 and 4: 1.

Due to the viewing direction, the order in FIGS. 2 and 3 is just the opposite. Here, in each case, the leftmost according to the illustration has

 Multicomponent cartridge 2 the mixing ratio 4: 1, followed to the right, the mixing ratios 3: 1; 2: 1 and 1: 1.

The multi-component cartridge 2 shown in section in FIG. 4 has the mixing ratio 2: 1. Since the cross-sectional area of the receiving chambers 3.4 perpendicular to

A longitudinal direction A are each circular surfaces, the ratio of

Outside diameter D1 of the first receiving chamber 3 for

Outer diameter D2 of the second receiving chamber 4 for the

Mixing ratio 4: 1 the value 2, for the mixing ratio 3: 1 the value root of three and for the mixing ratio 2: 1 the value root of 2. For the mixing ratio 1: 1, the outer diameter D1 of the first

Receiving chamber 3 equal to the outer diameter D2 of the second

Receiving chamber 4.

It goes without saying that the set 1 of multi-component cartridges 2 may alternatively or additionally also comprise multi-component cartridges 2 with different mixing ratios.

Claims

Set of multi-component cartridges with at least two Multi-component cartridges (2), each one  Multicomponent cartridge (2) comprises at least a first and a second receiving chamber (3,4) for components to be discharged, wherein each receiving chamber (3,4) is substantially cylindrical and extends in a longitudinal direction (A), wherein the receiving chambers (3, 4) are arranged parallel to each other and in the longitudinal direction (A) have the same extent (L), each multi-component cartridge (2) is made in one piece, so that their receiving chambers (3,4) are permanently connected to each other, characterized in that the first receiving chamber (3) everyone Multi-component cartridge (2) of the set (1) the same Outer diameter (D1) has. A kit according to claim 1, wherein each first receiving chamber (3) has the same volume. A kit according to any one of the preceding claims, wherein each multi-component cartridge is a two-component cartridge (2). Set according to one of the preceding claims, in which each multi-component cartridge (2) is produced by means of an injection molding process. A kit according to any one of the preceding claims, wherein each receiving chamber (3,4) has a separate outlet (31, 41) through which the component can be discharged from the respective receiving chamber (3,4). A set according to claim 5, wherein in each multi-component cartridge (2) all the outlets (31, 41) are arranged in a common connecting piece (5) adapted to cooperate with an accessory (6), in particular with a closure cap or with a mixer. 7. Set according to claim 6, wherein the connecting piece (5) a  Having thread for cooperation with the accessory (6). A kit according to claim 6, wherein the connector (5) comprises a bayonet coupling for cooperation with the accessory (6). 9. Set according to one of the preceding claims, wherein for each receiving chamber (3,4) a chamber bottom forming piston (9) is provided, with which by pressurizing the  Component from the respective receiving chamber (3,4) can be brought out. 10. sentence according to one of the preceding claims, with a  Multi-component cartridge (2), in which the volume of the first receiving chamber (3) is equal to the volume of the second receiving chamber (4). 1 1. Kit according to one of the preceding claims, with a  Multi-component cartridge, wherein the ratio of the volume of the first receiving chamber (3) to the volume of the second  Recording chamber (4) is two to one. 12. sentence according to one of the preceding claims, with a  Multi-component cartridge, wherein the ratio of the volume of the first receiving chamber (3) to the volume of the second  Recording chamber (4) is three to one. 13. sentence according to one of the preceding claims, with a  Multi-component cartridge, wherein the ratio of the volume of the first receiving chamber (3) to the volume of the second  Recording chamber (4) is four to one.