EP3868942A1 - Household appliance with a caustic container and balancing weights attached thereto, and method of manufacturing a caustic container of such household appliance - Google Patents

Abstract

The invention relates to a household appliance W with a housing 1, with a tub 2, which has a substantially cylindrical jacket 22, a front side wall 23 and a rear side wall 24 and is arranged swinging in the housing 1 of the household appliance W, and with at least one Balance weight 28 which is connected to the tub 2. The jacket 22, the front side wall 23 and / or the rear side wall 24 has honeycomb-like ribs 26 which form individual, outwardly open, spatial structures 27, and the at least one counterweight 28 ₁ - 28 _n is in one of the spatial structures 27 ₁ - 27 _n inserted and fastened with a press fit in one of the spatial structures 27 ₁ - 27 _n.

The invention also relates to a method for producing a tub 2 for such a household appliance W.

Description

The invention relates to a household appliance with a housing, with a tub, which has a substantially cylindrical jacket, a front side wall and a rear side wall and is arranged swinging in the housing of the household appliance, and with at least one counterweight that is connected to the tub , and a manufacturing process for a tub of such a household appliance.

Through the EP 1 522 624 A2 teaches how components of a tub can be designed in such a way that counterweights can be present in relation to the tub of a household appliance. For this purpose, components of the tub are designed in such a way that they have cavities into which concrete can be poured. The components concerned must be provided with filling openings for the introduction of the not yet hardened concrete, which lead to components that take up unnecessary space. In addition, it is hardly possible to check whether the concrete has distributed properly in the relatively large cavities until it hardens.

In the DE 20 2007 007 462 U1 it is discussed that ballast weights are notoriously attached to the outer walls of lye containers by means of screws. If concrete is used as a ballast weight, it often happens that cracks form in the area of the screw connections, since concrete is a relatively brittle material. As a solution for eliminating the formation of cracks in concrete, it is provided that a bond is made between the surface of the ballast weight and a surface of the tub.

With the EP 969 134 A1 shows how it can be avoided in a different way that ballast weights made of concrete can break in the area of their attachments to the tub. For this purpose, a housing with a cavity is produced, in which the not yet hardened cement mixture is poured. For fastening elements, such as screws and bolts, openings are already provided in the aforementioned housing.

In the EP 601 347 A1 material that is used to form at least one counterweight is accommodated in a plastic shell that is closed with a membrane. The connection with the plastic lye container is made in that both the plastic lye container and the plastic shell containing the counterweight material are provided for joining by means of respective matching projection elements from the container and the plastic shell and are, so to speak, finally firmly connected by fusion welding the plastic material.

After all, it is the object of the invention to provide a household appliance with a tub and with at least one counterweight that is connected to the tub, the counterweights of which can be allocated in a space-saving and stable manner.

Furthermore, it should be possible to produce a tub with counterweights in a suitable manner for such a household appliance.

This object is achieved with a household appliance by the features specified in claim 1 and further developed by the claims that refer back to this claim.

Furthermore, the object is achieved with a manufacturing method of the tub with the features of claim 11 and the further claims referring back to this claim are further developed.

The invention thus relates to a household appliance with a housing, with a tub, which has a substantially cylindrical jacket, a front side wall and a rear side wall and is arranged swinging in the housing of the household appliance, and with at least one counterweight that is connected to the tub is. The jacket, the front side wall and / or the rear side wall has ribs which are arranged in a honeycomb-like manner and which have individual spatial structures that are open to the outside form. The at least one balance weight is inserted into one of the spatial structures and fastened with a press fit in one of the spatial structures. A press fit is understood to be a force-fit connection between components, the force-fit connection being generated on the basis of the geometrical dimensions of the components concerned and without further aids, ie a clamping connection is generated.

With the invention it is therefore possible to be able to fasten counterweights in the area of a ribbing formed on the tub, in particular in the region of the front or rear side wall, which is also referred to below as the cover, the ribbing advantageously contributing to the stability of the tub and at the same time to the Fixing the counterweights is used. The ribs, which are preferably arranged on the outer wall of the tub, form spatial structures that are open on one side and which can accommodate balancing weights that fit exactly into these spatial structures, i.e. at least one area of a balancing weight is designed to be congruent in shape to the shape of the spatial structure.

The counterweights are positioned on the tub, which is arranged to swing in a housing, in such a way that, when the household appliance is operating properly, the vibrations caused by its operation are minimized and / or that the tub assumes a preferred position when the household appliance is set up for operation, the position in particular, a rest position is determined by the spring-mass system, which is formed by a system that is oscillating in the housing and includes the tub. Such a swinging system consists, for example, in the case of a household washing machine or a household washer-dryer, from the tub, a laundry drum rotatably arranged therein, a motor connected to the tub and spring elements with which the tub is at least indirectly connected to the housing of the household washing machine or the household washer-dryer. In other words, the position of such a vibrating system is determined by the sum of the forces acting on the system, whereby the positioning of the counterweights advantageously allows the inertial forces acting on the system to be matched to the other forces acting on the system, in particular spring forces.

In addition, the balance weights influence the oscillating movement of the tub during operation of the household appliance. The further away the balance weight is used from the axis, the more its share in the formation of a moment of inertia or a rotating mass increases in order to keep the extent of torsional vibrations of the tub small. On the other hand, the sum of the counterweights used serves to minimize linear deflections of the tub, for example during a spinning process with laundry that is unevenly distributed in a drum. A designer or specialist will understand how to use these design options so that overdimensioning when using counterweights can be avoided. In general, several balancing weights are used in the spatial structures assigned to them, but only one balancing weight could be sufficient to effect the balancing.

The at least one counterweight is particularly preferably incorporated in the front and / or rear side wall. This has the advantage that the ribs are already provided to increase the stability of the side walls and at the same time can be used to hold the counterweights, so that the stability requirements do not have to be restricted and the tub can be manufactured particularly inexpensively.

It is particularly advantageous that a balance weight is designed to be congruent in shape to the spatial structure and is fastened in the spatial structure with a press fit. Further fastening elements and / or fastening methods can thus be avoided, as a result of which the household appliance can be manufactured particularly inexpensively. In the present case, a press fit is understood to mean a type of fastening in which the area of a balance weight inserted into the spatial structure is geometrically oversized compared to the geometrical dimensions of the spatial structure and, in the inserted state of the balance weight, exerts a pressing force on the wall of the spatial structure or the ribs Area of balance weight is exercised. In other words, the counterweight is trapped in the structure of the room.

A balance weight is preferably formed by a dimensionally stable, pressure-resistant material. This development has the advantage that the pressing force is also maintained over the service life of the household appliance.

A metal, a metal alloy, concrete and / or a plastic mixture is preferably selected as the material for the balance weight, wherein in the case of a plastic mixture the mixture is preferably selected such that it has a specific weight which corresponds at least to the specific weight of concrete . Such a plastic mixture can be provided, for example, by adding metal particles, sand or similar materials which have a higher specific weight than the specific weight of the plastic used. Through the preferred choice of material, a balance weight with a high mass can be created, which, however, has a small volume. This has the particular advantage that the space required for the operation of the tub to vibrate is not restricted by the balance weights. The balance weight is particularly preferably used completely in the spatial structure.

It can also be provided that a balance weight has a dimensionally stable casing, such as made of plastic, in which there is a cavity into which sand or water can be introduced. With this alternative design, too, a balancing weight of high mass with a small volume can advantageously be created. In addition, more cost-effective materials can be used for the balance weight, especially in comparison to balance weights made of metal or a metal alloy.

It is also possible for the balance weight to be wrapped in a plastic film. This has the particular advantage that the balancing weight can be designed to be undersized in relation to the spatial structure in which the balancing weight is used, the excess required for the press fit being created by the plastic film which at least partially envelops the balancing weight. Production-related tolerances can also advantageously be compensated for by the plastic film.

For example, the assignment of the plastic film to the material concrete can take place relatively early in relation to its shaping and curing process, since a Heat dissipation during the curing process has a favorable effect on a precisely fitting enclosure of the already dimensionally stable concrete part of the counterweight.

It can also be taken into account that gas exchange during the curing process can take place via very small pores in the plastic film, which are irrelevant for their later use in the counterweight with regard to mechanical stability, or moisture can also be added to the concrete so that no Stress cracks occur during curing.

From the balance weight, however, it is only possible to produce undersize in relation to the spatial structure in which the balance weight is to be used and then to enclose it in one or more layers of the plastic film.

Then, according to a preferred development, it is possible for the plastic film covering to consist of two mutually correspondingly designed parts which each have a collar in a connection area, which are connected to one another, in particular welded. This development has the particular advantage that when inserting or by inserting counterweights designed in this way into the intended spatial structures, the collar formed is deformed, in particular folded over, and an accumulation of material is created in the deformed area, which forms the oversize required for the press fit.

A household appliance, as described above, preferably also has a laundry drum mounted inside the tub and driven by a motor attached to the outside of the tub via a belt drive, an axis of the tub coinciding with an axis of rotation of the drum and the tub with the housing is connected to at least one spring, the at least one counterweight being designed and arranged on the tub such that an operational deflection of the tub with the counterweight is less than a deflection of the tub caused by the same operation without such a counterweight.

A household appliance, as specified above, can in particular be a washing machine or a washer-dryer.

• Ausbilden von Rippen an einer Komponente, insbesondere an dem Mantel, der vorderen Seitenwand und/oder der hinteren Seitenwand des Laugenbehälters, wobei mit den Rippen zumindest eine Raumstruktur ausgebildet wird,
• Herstellen der Komponente mit den Rippen in einem Kunststoff- Spritzgussverfahren, und
• Herstellen einer Pressverbindung zwischen den Rippen und dem zumindest einen Ausgleichsgewicht (28) durch Eindrücken des Ausgleichsgewichts in die Raumstruktur.

According to the invention, the tub of the household appliance shown above is produced by the following steps:

• Forming ribs on a component, in particular on the casing, the front side wall and / or the rear side wall of the tub, with at least one spatial structure being formed with the ribs,
• Manufacture of the component with the ribs in a plastic injection molding process, and
• Establishing a press connection between the ribs and the at least one counterweight (28) by pressing the counterweight into the spatial structure.

With such a method, the tub can be manufactured particularly simply and inexpensively, since the counterweights only have to be pressed into geometrically congruent spatial structures of the tub. Further manufacturing steps for attaching the counterweight, such as screwing or welding, can be omitted. It is also advantageous to manufacture the tub from plastic in an injection molding process, since the ribs required to form the spatial structures can be formed on the tub in the same process step. In addition, plastic has a certain elasticity, as a result of which a counterweight can easily be inserted into the ribs made of plastic, even if it is oversized, and the required pressing force is nevertheless provided after it has been pressed in.

The manufacture of the tub can be limited to the manufacture of a component of the tub, for example the manufacture of a front or rear side wall that belongs to the tub, which in turn is part of a vibrating system, in particular according to one of the preceding items. With the steps, for example, a prefabricated side wall can be created by first producing a side wall with ribs that are capable of giving off spatial structures in a plastic injection molding process, and then pressing counterweights into the spatial structures in such a way that they are permanently associated with the side wall by means of a press fit are. In a subsequent step, the component produced and preassembled in this way is combined with the other components of the tub tied together. As a result, the manufacturing process for the tub can be implemented more easily and cost-effectively.

In particular, it is provided that the balance weight is formed by a dimensionally stable body which is at least partially covered with a plastic film. This again has the particular advantage that the counterweight can be designed to be undersized, with the oversize required for the press fit being created by the plastic film which at least partially envelops the counterweight. This also enables simple adaptation to the manufacturing tolerances of the balancing weights and / or the spatial structures by using, for example, plastic films of different thicknesses or by enveloping the balancing weight in several layers of the plastic film. In order to reduce the use of material for the plastic film, the envelope can be limited to the area of the counterweight which surrounds the spatial structure in the pressed-in state.

The dimensionally stable body can for example be made of metal, a metal alloy, concrete and / or a plastic mixture or a dimensionally stable, filled casing made of plastic.

The balance weight is preferably pressed in by an automatic production machine. Furthermore, the balance weight can also be automatically fed to the component with a feed device. It is particularly advantageous if the production machine is designed for feeding and imprinting the balance weight at the same time, as a result of which the production process can be carried out in a simpler, faster and more cost-effective manner.

Furthermore, in a further development of the method it can be provided that the plastic film covering of the counterweight is made of two mutually corresponding parts, a collar being formed on each part, the two collars of the corresponding parts being connected to one another, in particular welded. When the balance weight is pressed into the assigned spatial structure, the two collars are folded over and form the press connection between the spatial structure and the balance weight in the spatial structure in question.

The embodiments marked as advantageous for household appliances with a tub are also advantageous embodiments for the method for producing a tub and vice versa.

• Fig. 1 eine Prinzipdarstellung einer Waschmaschine in einer schematischen, seitlichen, teilweise geschnittenen Ansicht unter besonderer Berücksichtigung des erfindungsgemäß ausgestalteten Laugenbehälters,
• Fig. 2a eine räumliche Teil- Ansicht auf eine Seitenwand des Laugenbehälters mit einer Verrippung und einem zugehörigen Ausgleichsgewicht,
• Fig. 2b eine größere, räumliche Ansicht eines Ausgleichsgewichtes,
• Fig. 3 eine weiterhin vergrößerte, räumliche Ansicht eines Ausgleichsgewichtes mit einer angebrachten Kunststoff- Umhüllung.

In the following, the invention is described in more detail schematically with reference to the exemplary embodiments shown in the accompanying drawing. The preferred embodiment of the household appliance is shown as a washing machine. The figures of the drawing are first briefly explained. Show it:

• Fig. 1 a schematic representation of a washing machine in a schematic, side, partially sectioned view with special consideration of the tub designed according to the invention,
• Fig. 2a a spatial partial view of a side wall of the tub with ribbing and an associated counterweight,
• Figure 2b a larger, three-dimensional view of a counterweight,
• Fig. 3 a further enlarged, three-dimensional view of a balance weight with an attached plastic casing.

A washing machine W after Fig. 1 has a housing 1. In this housing 1, a tub 2 is mounted in a swinging manner on spring elements 3, whereby the spring elements can also be combined with damping elements, so that combined spring-damping elements 3 can also be involved. It can also be pure damping elements 3 ′ if springs (not shown here) are used in such a way that the tub 2 is suspended, so to speak, opposite the housing 1. Via a belt drive 4, an electric motor 5 drives a laundry drum 6, which is usually mounted essentially horizontally within the tub 2. Due to the storage of the laundry drum 6 within the tub 2, there is a common axis 12, which is to be discussed below in particular because of the type of vibrations that occur. The laundry drum 6 and the tub 2 have a common loading opening 9 through which the laundry 15 can be introduced into the drum 6 or removed from it. It is also important to have a bellows seal 7 on the one hand, vibrations of the tub 2 with respect to the housing 1 can be compensated and it can be achieved that liquid 11 introduced in the tub, which can reach a considerable level in individual washing processes, cannot penetrate into the housing 2. The loading opening on the front can be closed by a door 8. The sealing function can still be completed by a porthole 13 of the door 8, which presses on a sealing lip (not shown) of the cuff 7.

A tub such as 2 is usually made of plastic material. In this case, there is a cylindrical jacket 22, of suitable cross section, to which a front side wall 23 or a front cover and a rear side wall 24 or a rear cover, each with a substantially circular cross section, are connected. In order to achieve sufficient stability of these side walls 23 and 24, they have ribs on the side facing away from the interior of the tub 2 (outside of the tub or the respective side wall) in order to increase their stability. The side walls 23 and 24 are connected to the essentially cylindrical jacket 22 by a suitable method, for example by a welding method or by means of a screw connection. The front side wall 23 has the loading opening 9 in accordance with the preceding explanations, and the rear side wall 24 has the bearing for a stub shaft (without reference number) of the drum 6, which is connected in a rotationally fixed manner to a V-belt pulley (without reference number) of the belt drive 4.

The tub 2 with its ancillary units, such as the motor 5, represents an oscillating system in relation to the housing 1 of the washing machine, in particular due to the suspension described above, see FIGS. 3 and 3 ' recorded, mostly damp laundry 15, z. B. during a spinning process, the tub 2 is excited to vibrate, in particular due to a laundry imbalance that forms. In order to keep the extent of the rotational and translational movement of the tub 2 caused by the acting forces as small as possible, it is necessary for the tub 2 itself to have a sufficiently large moment of inertia or a sufficiently large mass of inertia. In particular, if the drum 6 is unevenly loaded during a spinning process, a deflection of the tub 2 is essentially perpendicular to the Axis 12 take place. The extent of this linear deflection can also be reduced if the weight of the tub 2 is increased.

According to the invention, at least one counterweight 28 is now connected to one of the side walls 23 and / or 24 by providing the above-described ribbing of the side walls 23 and 24, in particular 24, which is present for reasons of stability, for accommodating counterweights.

This is how in Fig. 2a according to the arrow P in Fig. 1 a spatial detail view of the rear side wall 24 is shown. It can thus be seen that ribs 26 form a honeycomb-like structure, with individual spatial structures 27 (27 ₁ - 27 _n ) that are open to the outside and that are, so to speak, pocket-like, present. Associated with one of the spatial structures 27 or with a selected number (1 - n) of spatial structures 27 ₁ - 27 _n can be one or more matching balancing weights 28, i.e. a total of balancing weights 28 ₁ - 28 _n in relation to the spatial structures 27 ₁ - 27 _n , are used in such a way that a respective balancing weight 28 is permanently fixed in place with respect to the side wall 24. For this purpose, the balancing weight 28 can, for example, have a spatial extension which congruently corresponds to the spatial extension of the honeycomb-like structure formed by the inner walls of the ribs 26. One of the honeycomb-like structure formed by the ribs 26 is referred to as a spatial structure 27. However, the spatial extent of the balance weight 28 is enlarged compared to the spatial extent of the spatial structure 27 such that, in the inserted state, a press fit is formed between the balance weight 28 and the spatial structure 27 assigned to the balance weight 28. The congruent spatial expansion of the balance weight 28 and the spatial structure 27 can be limited to the area in which the press fit is formed.

For the moment of inertia of the tub 2 to be trained, it is advantageous to use the counterweights 28 ₁ - 28 _n as far away as possible from the axis 12 or the center of gravity (not shown) of the oscillating system formed by the tub 2, since this is the square of the middle Distance from the axis 12 or the shear point has an effect, with balancing weights that are closer to the axis 12 also making a linearly cumulative contribution to the increase in the weight of the tub. However, one will get to the total number To keep the counterweights, such as 28, small, preferably use counterweights that are further away from the axis 12, especially since the counterweights located closer to the axis can only be made relatively small in the exemplary embodiment shown.

If the front side wall 23 is also provided for the use of counterweights, the aspects described above with reference to the side wall 24 are to be applied accordingly. In addition, counterweights that are assigned to the front side wall 23 can also make a contribution to the fact that a static compensation of the weight of the motor 5 is compensated, provided that this is not done by different spring hardnesses of the springs for suspension / support (cf. at 3) of the tub 2 is taken into account.

The training of an in Figure 2b separately spatially shown balance weight 28 can be done in various ways.

It is thus possible for a material such as a metal or a metal alloy to be selected and for a die-casting manufacturing process to be used as the basis. It should be ensured that the specific weight of the metal or metal alloy is as high as possible. However, a core made of metal or a metal alloy can also be encapsulated with a plastic.

Furthermore, it is also possible that a plastic housing, which has a finished outer contour of the balance weight 28 and a cavity, is used. Then it is necessary that a ballast material such as (quartz) sand is introduced through an opening, which is then finally closed.

Instead of sand, water can also be introduced into the plastic housing described above.

Otherwise concrete is preferred. The precast concrete part should then almost correspond to the three-dimensional shape of the relevant counterweight 28. In order to achieve a better adaptation to the walls of the ribs 26, which determine the open spatial structure 27, it has been found that an envelope with a plastic film proves to be particularly expedient. Such a wrap is not on Balancing weights made of concrete are limited, they can also be used for differently designed, dimensionally stable counterweights, for example for counterweights made of metal, a metal alloy and / or a plastic mixture or a dimensionally stable, filled envelope made of plastic.

In Fig. 3 a single balancing weight 28 is shown, which is encased with a total of a plastic film envelope 29. The plastic film envelope 29 then preferably consists of two matching parts 30 and 31, for example mirror-inverted, which preferably form a collar 32 in the middle in a plane perpendicular to the axis 12 (in relation to the use to be made in the side wall 24) are formed and allow welding on opposite surfaces of the collars 32 'and 32 ". Alternatively, the plastic film cover can be produced by so-called welding of the balance weight, in which case the weld seam formed on the welded-in balance weight then forms the collar without the need for two parts beforehand a collar must be provided in each case, but the plastic film is unwound from a coil and shortened to the length required for wrapping ..

Such an enveloped counterweight 28 with a collar 32 can be pushed into the room structure or pocket 27, the then folded-down collar 32 exerting pressure on the walls of the room structure so that a respective counterweight 28 is held as securely as if a Extortion had taken place. In other words, the interference fit between the balance weight 28 and the spatial structure 27 is provided by the folded-over collar 32.

The plastic film cover can be produced by wrapping the balance weight with a plastic film in one or more layers. The wrapped envelope does not need to be specially fastened, but only held until the counterweight is inserted into the spatial structure, since after the insertion the plastic film is fixed at the same time by the press fit that is being formed.

The balance weights 28 according to the based on Fig. 3 described type can, if they are available for a production process according to the prerequisites, also automatically fed to a side wall, such as 24, inserted into the respective pockets 27 and are then finally pressed in such that they remain securely in the cover 24, in particular also during operation of the washing machine, which is designed in this way with counterweights 28 for the tub 2.

List of reference symbols:

1

casing

2

Suds container

3

Spring elements

4th

Belt drive

5

Electric motor

6th

Laundry drum

7th

Bellows sleeve

8th

door

9

Loading opening

11

liquid

12th

axis

13th

Porthole

15th

Laundry

22nd

a coat

23

front sidewall

24

rear sidewall

26th

Ribs

27

Spatial structure

28

Counterweight

29

Plastic film wrapping

30th

mirror image of 29

31

mirror image of 29

32, 32 ', 32 "

collar

W.

Washing machine

P.

Arrow

Claims (14)

Household appliance with a housing (1), with a tub (2), which has a substantially cylindrical jacket (22), a front side wall (23) and a rear side wall (24) and is in the housing (1) of the household appliance (W ) is arranged swinging, and with at least one balance weight (28) which is connected to the tub (2), characterized in that the jacket (22), the front side wall (23) and / or the rear side wall (24) honeycomb having arranged ribs (26), which individual, outwardly open, form space structures (27), and that the at least one balance weight (28 ₁ - 28 _n) in one of the spatial structures _{(27: 1} - 27 _n) are used and with an interference fit in one of the spatial structures (27 ₁ - 27 _n ) is attached. Household appliance according to claim 1, characterized in that the household appliance has several counterweights (28 ₁ - 28 _n ), each counterweight (28 ₁ - 28 _n ) being assigned a spatial structure (27 ₁ - 27 _n ) into which the assigned counterweight ( 28 ₁ - 28 _n ) is inserted and secured with an interference fit. Household appliance according to claim 1 or 2, characterized in that the balance weight (28) is formed by a dimensionally stable, pressure-resistant material. Household appliance according to Claim 3, characterized in that the counterweight (28) is formed from metal, a metal alloy, concrete and / or a plastic mixture. Household appliance according to claim 1 or 2, characterized in that the balance weight (28) has a dimensionally stable casing (29), in particular made of plastic, and a cavity into which sand or water is introduced. Household appliance according to one of the preceding claims, characterized in that the balance weight (28) is encased in a plastic film (29). Household appliance according to claim 6, characterized in that the plastic film covering (29) consists of two mutually correspondingly designed parts (30, 31) each having a collar (32, 32 ', 32 ") connected to one another in a connection area , in particular welded, are. Household appliance according to one of the preceding claims, characterized in that a laundry drum (6) is mounted inside the tub (2) and is driven by a motor (5) attached to the outside of the tub (2) via a belt drive (4), one axis (12) of the tub coincides with an axis of rotation of the drum (6) and that the tub (2) is connected to the housing (1) with at least one spring (3), the at least one counterweight (28) being designed in this way and on the tub (2) is arranged that an operational deflection of the tub (2) with the balance weight (28) is less than a deflection of the tub (2) caused by the same operation without such a balance weight (28). Household appliance according to one of the preceding claims, characterized in that the at least one counterweight (28 ₁ - 28 _n ) is incorporated in the front and / or rear side wall (23, 24). Household appliance according to one of the preceding claims, characterized in that the household appliance (W) is a washing machine or a washer-dryer. Method for producing a tub (2) of a household appliance (W) according to one of the preceding claims, characterized by the steps: • Forming ribs (26) on a component, in particular on the jacket (22), the front side wall (23) and / or the rear side wall (24) of the tub (2), with the ribs (26) at least one Spatial structure (27) is formed, • Manufacturing the component with the ribs (26) in a plastic injection molding process, and • Establishing a press connection between the ribs (26) and the at least one counterweight (28) by pressing the counterweight (28) into the spatial structure (27). Method according to claim 11, characterized in that the counterweight (28) is formed by a dimensionally stable body which is at least partially covered with a plastic film (29). Method according to claim 12, characterized in that when the balance weight (28) is pressed into the spatial structure (27) with the plastic film (29), the press connection between the spatial structure (27) and the balance weight (28) is formed. Method according to claim 12 or 13, characterized in that the plastic film covering (29) of the counterweight (28) is made from two corresponding parts (30, 31), with a collar (32) on each part (30, 31) , 32 ', 32 ") is formed and the two collars (32' and 32") of the corresponding parts (30, 31) are connected to one another, in particular welded, so that the collar (32) in the spatial structure (27), the two collars (32 ', 32 ") are folded over and that the two collars (32', 32") in the relevant spatial structure (27) form the press connection between the spatial structure (27) and the counterweight (28) form.

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