DE102018128488A1 - Mixing of pourable building materials - Google Patents

Abstract

The invention relates to a device (1; 1a; 1b; 1c) for mixing several pourable building materials (3, 5; 3a, 5a; 5b; 3d, 5d, 3e; 5e) into a building mass (23; 23a; 23e) that can be processed further. in particular concrete mixers for the production of fresh concrete, the at least two storage containers (2, 4; 2a, 4a; 4b; 2d, 4d; 2e; 4e) for holding pourable building materials (3, 5; 3a, 5a; 5b; 3d, 5d, 3e; 5e) and a means (6, 8; 6a, 8a) for conveying the building materials from the storage containers (2, 4; 2a, 4a; 4b; 2d, 4d; 2e; 4e) into a mixer chamber (7; 7a; 7b; 7c; 7d; 7e), in the mixer chamber (7; 7a; 7b; 7c; 7d; 7e) a means for mixing the pourable building materials (3, 5; 3a, 5a; 5b; 3d, 5d, 3e ; 5e) is provided. The means for mixing expediently extends from one side (19; 19a; 19d, 19e) of the mixer chamber (7; 7a; 7b; 7c; 7d; 7e) on which the building materials (3, 5; 3a, 5a; 5b; 3d, 5d, 3e; 5e) are introduced into the mixer chamber (7; 7a; 7b; 7c; 7d; 7e), to a further side (22; 22a; 22d; 22e) on which the building mass (23; 23a , 23e) can be removed. Starting materials can advantageously be introduced at one end of a preferably cylindrical mixer chamber and at the same time conveyed to a removal side by the means for mixing and mixed to form the building mass which can be processed further. The invention further relates to a method for mixing several pourable building materials into a building mass which can be processed further.

Description

FIELD OF THE INVENTION

The invention relates to a device for mixing several pourable building materials into a building mass that can be further processed. The invention further relates to a method for mixing several pourable building materials into a building mass which can be processed further.

TECHNICAL BACKGROUND

Stationary concrete mixers are known from the prior art, in which water, cement and sand are introduced into a mixer chamber for the production of fresh concrete and mixed with one another to form a homogeneous fresh concrete mass. The mixer chamber has a single opening through which the starting materials can be introduced and the fresh concrete can be removed. Furthermore, the amount of fresh concrete that can be produced depends on the size of the mixer chamber.

This is a condition that needs to be improved.

SUMMARY OF THE INVENTION

Against this background, the present invention has for its object to provide a device that enables continuous production of fresh concrete and in which a quantity that can be produced is independent of the size of the mixer chamber.

According to the invention, this object is achieved by a device with the features of claim 1 and by a method with the features of claim 13.

• - eine Vorrichtung zur Durchmischung mehrerer schüttfähiger Baustoffe zu einer weiterverarbeitbaren Baumasse, insbesondere Betonmischer zur Herstellung von Frischbeton, die mindestens zwei Vorratsbehälter zur Aufnahme von schüttfähigen Baustoffen sowie ein Mittel zur Förderung der Baustoffe aus den Vorratsbehältern in eine Mischerkammer aufweist, wobei in der Mischerkammer ein Mittel zum Durchmischen der schüttfähigen Baustoffe vorgesehen ist, wobei sich das Mittel zum Durchmischen von einer Seite der Mischerkammer, an der die Baustoffe in die Mischerkammer eingebracht werden, zu einer weiteren Seite, an der die weiterverarbeitbare Baumasse entnehmbar ist, erstreckt; sowie
• - ein Verfahren zur Durchmischung mehrerer schüttfähiger Baustoffe zu einer weiterverarbeitbaren Baumasse, insbesondere zur Herstellung von Frischbeton, bei dem aus mindestens zwei Vorratsbehältern gleiche oder verschiedene schüttfähige Baustoffe in eine Mischerkammer eingebracht werden, wobei die Baustoffe an einer ersten Seite der Mischerkammer eingebracht werden und die weiterverarbeitbare Baumasse an einer weiteren Seite der Mischerkammer entnommen wird.

Accordingly, it is provided:

• - A device for mixing several pourable building materials into a building mass that can be processed further, in particular a concrete mixer for the production of fresh concrete, which has at least two storage containers for receiving pourable building materials and a means for conveying the building materials from the storage containers into a mixer chamber, with a means in the mixer chamber is provided for mixing the pourable building materials, the means for mixing extending from one side of the mixer chamber, on which the building materials are introduced into the mixer chamber, to a further side, on which the further processable building mass can be removed; such as
• - A method for mixing several pourable building materials to a further workable building mass, in particular for the production of fresh concrete, in which the same or different pourable building materials are introduced into a mixer chamber from at least two storage containers, the building materials being introduced on a first side of the mixer chamber and the further processable Construction mass is taken from another side of the mixer chamber.

According to the invention, the object is achieved in that the means for mixing extend from one side of the mixer chamber, on which the building materials are introduced into the mixer chamber, to a further side, on which the building mass which can be further processed is removed.

Advantageous refinements and developments result from the further subclaims and from the description with reference to the figures of the drawing.

Accordingly, starting materials can be introduced at one end of a mixer chamber and at the same time conveyed to a removal side by the means for mixing and mixed to form the building mass which can be processed further. Due to the fact that starting material is introduced from one side and the construction mass that can be further processed is removed from another side of the mixer chamber, a quantity of construction mass that can be produced is independent of the size of the mixer chamber.

The mixing means expediently comprises a mixing tool which is arranged in the mixer chamber so as to be rotatable about an axis with a horizontal directional component. The mixing tool preferably extends through the entire mixer chamber from a starting material entry side to a removal side. The entire chamber volume can thus be used to produce a building mass.

The mixer chamber is preferably cylindrical. An axis of rotation of the mixing tool and the cylinder axis of the mixer chamber can be arranged coaxially to one another. Due to the rotational symmetry of the cylinder, material can be prevented from depositing unevenly on the mixer chamber.

A horizontal arrangement of a cylindrical mixer chamber is also advantageous. This ensures particularly homogeneous mixing and a short mixing time.

According to a preferred development of the invention, the means for mixing comprises a mixing tool that has a rotatable shaft, from which project a plurality of mixer blades in the radial direction, which are arranged next to one another in the axial direction and / or in the circumferential direction of the shaft and which are in particular made of spring steel. Due to its special mechanical (elastic) properties, spring steel, in contrast to mixer blades formed from rigid materials, has proven to be advantageous in order to achieve homogeneous mixing or to avoid foreign bodies. The shaft can be driven by a drive unit.

The elasticity of a spring steel is achieved by producing an alloy with the corresponding properties. An alloying element that favors this is silicon (among others). It is also important to ensure that the carbon content is distributed as evenly as possible.

The mixer blades preferably extend from the shaft to just in front of an inner wall of the mixer chamber. This means that the entire mixer chamber volume can be used. It also prevents material from settling on the inside of the mixer chamber.

At a longitudinal position of the shaft, for example, two or four mixer blades can be attached offset in the radial direction at an angle of 180 degrees or 90 degrees to one another.

According to a preferred embodiment of the invention, the means for mixing comprises a mixing tool which has a rotatable shaft, from which a plurality of mixer blades protrude in the radial direction, each of which has a blade-shaped end section on a side facing away from the shaft. The end section is preferably formed from flat metal elements which are attached obliquely in a conveying direction of the mixer chamber, that is to say at a certain angle with respect to a longitudinal axis of the shaft, on a straight or winding stem of the mixer blade which connects the blade-shaped end section to a shaft of a mixing tool. Depending on the position on the shaft, angles between 3 ° and 50 ° are conceivable, larger angles being advantageous in the area of a material input, while angles of less than 15 degrees are advantageous in a central area of the mixer chamber.

According to a preferred development of the invention, the mixer chamber has a plurality of mixing areas, the mixer blades differing in terms of shape and / or in terms of the angle of attack relative to the shaft between the mixing areas.

It is further expedient if the mixer chamber has at least three mixing areas, of which a first and a third mixing area have the same mixer blades in terms of shape and / or in terms of the angle of attack with respect to the shaft, and a second mixing area has mixer blades which have in terms of shape and / or are different in terms of the angle of attack with respect to the shaft from those of the first and third mixing areas, the second mixing area being formed between the first and third mixing areas.

For example, the angle of attack of the mixer blades in the second mixing area can be approximately 45 ° and in the first or third mixing area approximately 0 ° -15 °, approximately 10 °.

The individual mixing areas can be the same or different sizes. It is particularly advantageous if the second mixing area, which is arranged between the first and the third mixing area, is twice as large as the first or the second mixing area, which are preferably of the same size. As a result, a particularly homogeneous building mass which can be processed further can be produced and a short production time, that is to say delivery time through the mixing chamber, is possible.

Although it is conceivable that the individual mixing areas are spatially separated from one another, an open, continuous transition between the individual mixing areas is preferably provided.

According to a preferred development of the invention, the means for conveying the pourable building materials from the at least two storage containers has at least one, preferably two, screw conveyors. Screw conveyors are particularly suitable for moving bulk materials.

Screw conveyors (also screw conveyors) are conveyor systems for bulk goods based on the functional principle of the Archimedean screw. The screw conveyor located in a trough transports - usually motor-driven - appropriate goods over several meters, with the help of intermediate stores up to 60 meters. Gravity and the friction of the transported goods against the trough walls prevent the goods from rotating with the screw. In this way, it is transported continuously. If the friction on the wall is small with a high degree of filling, the material only rotates transversely to the screw axis and is not transported. In vertical transport, therefore, wall friction must be generated by centrifugal force, which may require high speeds of 250-400 min-1.

It is possible to transport the conveyed goods horizontally, at an angle and vertically. Processing steps can also be carried out during transport such as mixing, dewatering or compression, cooling or drying during transport is also possible.

The screw conveyors can have the same or different dimensions. Each screw conveyor is preferably driven by a motor with adjustable speed. As a result, by specifying the engine speed, a quantity of material to be removed from a storage container and thus a desired mixing ratio of the building materials can be set.

According to a preferred development of the invention, the screw conveyor is arranged coaxially to a shaft of a mixing tool of the mixing means and is preferably connected to it in a rotationally fixed manner or is integrally formed thereon. This means that only one drive is required to mix and feed a building material from the storage container.

According to a preferred development of the invention, the storage containers and the mixer chamber form a structural unit.

According to a preferred development of the invention, the device is designed to be mobile, in particular as a vehicle. This enables flexible use at different locations. For this purpose, the structural unit can have a support frame and wheels, which can in particular be driven individually. It is also conceivable that a coupling device is provided with which a connection to a towing vehicle, for example a tractor or a car, can be established. A steering device can also be provided.

Advantageously, a preferably collapsible conveyor belt is provided, which extends from an outlet of the mixer chamber to a place of use of the construction mass that can be further processed. The construction mass can thus be further processed immediately and, for example, conveyed to a place of use located higher than the device. Further transport or storage is not necessary.

Because the conveyor belt can be folded, this can be moved together with the device in the folded state.

Alternatively or additionally, the conveyor belt can also be integrated into the mixer chamber, as described above.

According to a preferred development of the invention, the conveyor belt is formed at least in two parts, in particular in several parts, and individual parts are movable, in particular pivotally connected to one another. This makes it easy to fold up the conveyor belt. Furthermore, it is thus possible to distribute the construction mass over a large area or to pour it precisely into a design.

According to a preferred development of the invention, a drive device is provided which is provided for changing a position of the conveyor belt and which preferably comprises an electric or hydraulic drive. For example, a head can be adjusted. This enables flexible use, for example depending on whether the building mass is to be used to pour a basement or to repair a roof of a building.

It goes without saying that the features mentioned above and those yet to be explained below can be used not only in the combination specified in each case, but also in other combinations or on their own without departing from the scope of the present invention.

The above refinements and developments can, if appropriate, be combined with one another as desired. Further possible refinements, developments and implementations of the invention also include combinations of features of the invention described above or below with reference to the exemplary embodiments, which are not explicitly mentioned. In particular, the person skilled in the art will also add individual aspects as improvements or additions to the respective basic form of the present invention.

Figure list

• 1 eine schematischen Seitenansicht einer Vorrichtung zur Durchmischung schüttfähiger Baustoffe gemäß einer Ausführungsform der Erfindung;
• 2 eine Detailansicht gemäß 1;
• 3 eine Detailansicht einer Rückansicht einer Vorrichtung zur Durchmischung schüttfähiger Baustoffe gemäß einer Ausführungsform der Erfindung;
• 4 eine Detailansicht einer Frontansicht einer Vorrichtung zur Durchmischung schüttfähiger Baustoffe gemäß einer Ausführungsform der Erfindung;
• 5 eine schematischen Seitenansicht einer Vorrichtung zur Durchmischung schüttfähiger Baustoffe gemäß einer Ausführungsform der Erfindung;
• 6 eine Detailansicht gemäß 5.

The present invention is explained in more detail below with reference to the exemplary embodiments given in the schematic figures of the drawing. It shows:

• 1 a schematic side view of a device for mixing pourable building materials according to an embodiment of the invention;
• 2nd a detailed view according to 1 ;
• 3rd a detailed view of a rear view of a device for mixing pourable building materials according to an embodiment of the invention;
• 4th a detailed view of a front view of a device for mixing pourable building materials according to an embodiment of the invention;
• 5 a schematic side view of a device for mixing pourable building materials according to an embodiment of the invention;
• 6 a detailed view according to 5 .

The accompanying figures of the drawing are intended to convey a further understanding of the embodiments of the invention. They illustrate embodiments and, in connection with the description, serve to explain principles and concepts of the invention. Other embodiments and many of the advantages mentioned result from the drawings. The elements of the drawings are not necessarily shown to scale with respect to one another.

In the figures of the drawing, elements, features and components that are the same, have the same function and have the same effect — unless otherwise stated — are each provided with the same reference symbols.

The figures are described below in a coherent and comprehensive manner.

DESCRIPTION OF EMBODIMENTS

An in 1 shown concrete mixer 1 comprises two storage containers arranged side by side 2nd , 4th , of which a first storage container 2nd for cement 3rd and a second reservoir 4th for sand 5 is provided. Through a first screw conveyor 6 can the cement 3rd from the first reservoir 2nd into a mixer chamber 7 of the concrete mixer 1 be promoted. By a second screw conveyor 8th can the sand 5 from the second reservoir 4th into the mixer chamber 7 of the concrete mixer 1 be promoted.

In the mixer chamber 7 there is a mixing tool 9 which is a rotatable shaft 10th comprises, arranged in the radial direction side by side along a shaft axis mixer blades formed from a spring steel 11 protrude. In this embodiment there is a single wave 10th for the mixing tool 9 as well as the screw conveyor 8th provided, the screw conveyor 8th in one piece on the shaft 10th molded and arranged coaxially to this.

On the wave 10th opposite ends 12th the mixer blades 11 are scoop-shaped end sections 13 , 14 , 15 appropriate. An in 1 Drive, not shown, for rotating the shaft 10th and the screw conveyor 8th is designed as an electrical, hydraulic or pneumatic drive.

The mixer chamber 7 is in three spatially separate mixing areas 16 , 17th , 18th divided. A first mixing area 16 is at a front end 19th the mixer chamber 7 on which the cement 3rd as well as sand 5 are supplied, and in this embodiment comprises two mixer blades 11 , which are arranged in pairs on the opposite side of the shaft and offset from one another in the axial direction. The scoop-shaped end sections 13 are made of flat metal sheets and in the conveying direction 20th obliquely by an angle between 35 and 50 degrees, preferably 45 degrees, with respect to a longitudinal axis of the shaft 10th appropriate.

In addition, the mixer blades have 11 a stem-like connecting portion wound in this embodiment 21st on the the wave 10th with the scoop-shaped end sections 13 , 14 , 15 connects. In the first mixing area 16 also leads to a 1 Water supply line, not shown, for introducing water into the mixer chamber 7 is provided.

A third mixing area 18th is located on one in the conveying direction 20th rear end 22 the mixer chamber 7 , on the fresh concrete produced 23 can be removed, and includes two mixer blades 11 with scoop-shaped end sections 15 , their arrangement and training to those blade-shaped end sections 13 of the first mixing area 16 is identical.

A second mixing area 17th is between the first mixing area 16 and the third mixing area 18th and has several mixer blades 11 on that are offset in different positions on the shaft 10th and are arranged offset to one another in the axial direction. The mixer blades are distributed on the shaft with inhomogeneous angular distances. The scoop-shaped end sections 14 are made of flat metal sheets and in the conveying direction 20th arranged obliquely by an angle between 3 and 10 degrees, preferably 5 degrees, pivoted relative to the shaft axis.

The storage containers 2nd , 4th and the mixing chamber 7 are on a wheeled, wheeled 24th provided support frame 25th attached and form a structural unit. A first, the mixer chamber 7 opposite axis 26 can be driven while a second axis 27th is designed as a steering axle. Furthermore or alternatively, an in 1 Connection device, not shown, can be provided with which the concrete mixer 1 can be connected to a towing vehicle, for example a tractor.

In addition, the mixer chamber 7 a removal flap on a lower side 28 on, through the fresh concrete produced 23 can be removed.

An in 2nd a concrete mixer shown in a schematic side view 1a includes a two-part conveyor belt 28 whose front part 29 about a pivot axis 30th towards a rear part 31 is foldable and in the area of a rear end 22 the mixer chamber 7a on a support frame 25a of the concrete mixer 1a is attached in such a way that through a removal flap 28a the mixer chamber 7a fresh concrete passing through 23a on the conveyor belt 28 is led and can be promoted to a place of use. A position, in particular a height of a front section of the conveyor belt 28 , is changeable by ropes 32 a cable 33 through a controllable drive 34 lengthened or shortened. The cable can also 33 are operated in such a way that the front part 29 of the conveyor belt 28 towards the rear part 31 is folded.

Furthermore, in 2nd a preferably hydraulic, pneumatic or electrical drive 35 shown to move a mixing tool 9a is set up.

In one in 3rd shown schematic, partially sectioned rear view of a concrete mixer according to the invention 1b is one by an engine 36 driven axis 26b shown. There is also a mixer chamber 7b with a mixing tool arranged in it 9b with mixer blades 11b recognizable.

In one in 4th shown schematic, partially sectioned front view of a concrete mixer 1c is a movable steering axle 27c shown.

One in 5 Another embodiment of a concrete mixer shown in a schematic side view 1d differs from that in 1 respectively. 2nd shown concrete mixer in that two storage containers 2e , 4e are arranged one above the other. A screw conveyor 37 in the reservoir 4e is not in one piece on a shaft of a mixing tool 9e molded and has its own, in 5 not shown drive. In contrast to that in 1 and 2nd shown embodiment, a rotational speed of the screw conveyor 37 regardless of a speed of rotation of the mixing tool 9d .

sand 5d from the reservoir 4d can through an inlet channel 38 that in a mixer chamber 7e of the concrete mixer 1d flows out, and which by an in 5 Flap, not shown, can be opened and closed from an upper side into the mixer chamber 7d be performed.

An in 6 shown concrete mixer 1e differs from that in 1 and 2nd shown concrete mixer in that two storage containers 2e , 4e are arranged one above the other and also an intermediate conveyor belt 39 is provided, which for the promotion of a mixer chamber 7e leaving fresh concrete 23e on a conveyor belt 28e is set up. This allows the conveyor belt 28e further ahead on a support frame 25e of the concrete mixer 1e be attached and placed in a steeper conveying position.

Although the present invention has been completely described above on the basis of preferred exemplary embodiments, it is not limited to these but can be modified in a variety of ways.

Claims (14)

Device (1; 1a; 1b; 1c) for mixing several pourable building materials (3, 5; 3a, 5a; 5b; 3d, 5d, 3e; 5e) into a building mass (23; 23a; 23e) that can be processed further, in particular concrete mixers for manufacturing of fresh concrete, the at least two storage containers (2, 4; 2a, 4a; 4b; 2d, 4d; 2e; 4e) for receiving pourable building materials (3, 5; 3a, 5a; 5b; 3d, 5d, 3e; 5e) and a means (6, 8; 6a, 8a) for conveying the building materials from the storage containers (2, 4; 2a, 4a; 4b; 2d, 4d; 2e; 4e) into a mixer chamber (7; 7a; 7b; 7c; 7d; 7e), a means for mixing the pourable building materials (3, 5; 3a, 5a; 5b; 3d, 5d, 3e; 5e) being provided in the mixer chamber (7; 7a; 7b; 7c; 7d; 7e) is, the means for mixing from one side (19; 19a; 19d, 19e) of the mixer chamber (7; 7a; 7b; 7c; 7d; 7e) on which the building materials (3, 5; 3a, 5a; 5b ; 3d, 5d, 3e; 5e) are introduced into the mixer chamber (7; 7a; 7b; 7c; 7d; 7e), to another side (22; 22a; 22d; 22e ), on which the building mass (23; 23a, 23e) can be removed, extends. Device after Claim 1 , characterized in that the means for mixing comprises a mixing tool (9; 9a; 9b; 9c; 9d; 9e) which is rotatable about an axis with a horizontal directional component in the mixer chamber (7; 7a; 7b; 7c; 7d; 7e ) is arranged. Device after Claim 1 or 2nd , characterized in that the means for mixing comprises a mixing tool (9; 9a; 9b; 9c; 9d; 9e) having a rotatable shaft (10; 10a; 10b; 10c; 10d; 10e), of which in the radial direction a plurality of mixer blades (11; 11a; 11b; 11c; 11d; 11e) protrude, which are arranged side by side in the axial direction and / or in the circumferential direction of the shaft (10; 10a; 10b; 10c; 10d; 10e). Device after Claim 3 , characterized in that the mixer blades (11; 11a; 11b; 11c, 11d; 11e) each have a curvature (13, 14, 15; 13a, 14a, 15a; 13b, 15b; 15c; 13d, 15d; 13e, 15e) have in the circumferential direction and / or in the axial direction. Device according to one of the preceding claims, characterized in that the mixer chamber (7; 7a; 7b; 7c; 7d; 7e) has a plurality of mixing areas, the mixer blades differing in shape and / or in terms of the angle of attack relative to the shaft between the mixing areas . Device after Claim 5 , wherein the mixer chamber has at least three mixing areas (16, 17, 18; 16a, 17a, 18a; 16d, 17d, 18d; 16e, 17e, 18e), a first (16; 16a; 16d; 16e) and a third Mixing area (18; 18a; 18d; 18e) have the same mixer blades in terms of shape and / or in terms of the angle of attack with respect to the shaft and a second mixing area (17; 17a; 17d; 17e) has mixer blades which are in terms of shape and / or in terms of Angle of attack with respect to the shaft are different from those of the first and third mixing areas, the second mixing area being formed between the first and third mixing areas. Device according to one of the preceding claims, characterized in that the means for conveying the pourable building materials (3, 5; 3a, 5a; 5b; 3d, 5d, 3e; 5e) from the at least two storage containers (2, 4; 2a, 4a ; 4b; 2d, 4d; 2e; 4e) has at least one screw conveyor (6, 8; 6a, 8a; 6d, 37; 6e, 37e). Device according to one of the preceding claims, characterized in that the means for conveying (8; 8a) is arranged coaxially to a shaft (10; 10a; 10b; 10c) of a mixing tool (9; 9a; 9b; 9c) of the means for mixing and preferably connected to it in a rotationally fixed manner and / or integrally formed thereon. Device according to one of the preceding claims, characterized in that the storage containers (2, 4; 2a, 4a; 4b; 2d, 4d; 2e; 4e) and the mixer chamber (7; 7a; 7b; 7c; 7d; 7e) form a structural unit form. Device after Claim 9 , characterized in that the structural unit is mobile. Device according to one of the preceding claims, characterized in that a preferably collapsible conveyor belt (28; 28e) is provided that extends from an outlet of the mixer chamber (7; 7a; 7b; 7c; 7d; 7e) to a place of use of the further workable construction mass ( 23; 23a, 23e) extends. Device after Claim 11 , characterized in that the conveyor belt (28; 28e) is constructed in several parts, in particular in two parts, and individual parts (29, 31; 29e, 31e) are movably, in particular pivotably, connected to one another. Device according to one of the preceding claims, characterized in that a drive device is provided which is provided for changing a position of the conveyor belt (28, 28e) and which preferably comprises an electric or hydraulic drive (34; 34d; 34e). Method for mixing several pourable building materials (3, 5; 3a, 5a; 5b; 3d, 5d, 3e; 5e) into a building mass (23; 23a, 23e) that can be processed further, in particular for the production of fresh concrete, in which at least two storage containers ( 2, 4; 2a, 4a; 4b; 2d, 4d; 2e; 4e) same or different pourable building materials (3, 5; 3a, 5a; 5b; 3d, 5d, 3e; 5e) in a mixer chamber (7; 7a; 7b; 7c; 7d; 7e) are introduced, the building materials (3, 5; 3a, 5a; 5b; 3d, 5d, 3e; 5e) on a first side (19; 19a; 19d, 19e) of the mixer chamber (7 ; 7a; 7b; 7c; 7d; 7e) are introduced and the further processable building mass (23; 23a; 23e) on another side (22; 22a; 22d; 22e) of the mixer chamber (7; 7a; 7b; 7c; 7d; 7e) is removed.

Images