DE102015102932A1 - Lye container for a washing machine - Google Patents

Abstract

The invention relates to a tub made of plastic for a washing machine, the one washing drum bearing receiving tub bottom (2) and an end face (4) open tub jacket (3) with this integrally formed fastening means (11, 12) for springs, dampers and a cap includes. The lye container casing (3) consists of organic sheet whose side edges (9) are integrally formed in a first retaining ring (7) molded onto the lye container bottom (2) in the injection molding process and a second retaining ring (8) formed on the open end side (4). The retaining rings (7, 8) are connected to one another by means of fastening webs (10) molded onto the outside of the organic sheet. The inner surface of the tub (1) is coated with a heat-reflecting metallic layer. With such a trained tub, the energy balance of the washing machine can be improved.

Description

The invention relates to a plastic tub for a washing machine, comprising a washing tub base receiving a washing tub base and an open at one end of the tub container jacket with this integrally formed fastening means for springs, dampers and a cap.

Lye container of the type mentioned are disadvantageous in that they have low energy efficiency due to the high heat capacity of existing plastic and running in a comparatively large wall thickness container bottom and a large amount of heat stored in thick-walled tub walls and can be discharged to the outside ,

The invention has for its object to form a plastic suds container so that an improved energy balance of the washing machine can be achieved.

According to the invention the object is achieved with a trained according to the features of claim 1 tub.

Advantageous embodiments and modifications of the invention will become apparent from the dependent claims.

In a tub of the type mentioned above, the basic idea of the invention in the formation of the tub casing made of a thin-walled organic sheet and in the creation of the technical means for fixing the thin-walled tub base by the organo sheet at the two side edges in retaining rings, which in the injection molding process on the tub bottom or are formed on the open end side of the tub and are connected to each other via molded on the outside of the organo sheet mounting webs together.

In an advantageous embodiment of the invention, the inner surface of the tub is steamed with a heat-reflecting metallic layer.

The tub formed in this way can store substantially no heat in the large-area thin-walled tub container jacket, from whose inner surface the heat is also radiated inward, so that the energy efficiency of the washing machine is improved.

In a further embodiment of the invention, the outside of the tub is steamed with a low-radiation layer to minimize the radiation of heat into the washing machine housing.

In an embodiment of the invention, the heat-reflecting layer consists of aluminum.

In a further embodiment of the invention, the integrated into the retaining rings side edges of the organic sheet are preformed wavy, so as to produce an intimate connection between the organic sheet and the retaining rings.

The fastening webs are preferably designed as a U-profile, wherein the fastening means for springs and dampers may be integrally formed on the fastening webs and / or the retaining rings.

In a further embodiment of the invention, fastening means in the form of screw domes for fastening the closure cap are formed on the second retaining ring.

The organic sheet is a high-strength thin-walled composite of a thermoplastic material and glass or carbon fibers, while the container bottom and the retaining rings and mounting webs are made of a thick-walled, glass fiber reinforced thermoplastic.

An embodiment of the invention is shown purely schematically in the drawing and will be described in more detail below. Show it:

1 a perspective view of a tub; and

2 an enlarged sectional view in the edge region of the tub bottom and jacket.

As 1 shows, includes the tub 1 a tub bottom 2 and a tub jacket 3 , The the tub bottom 2 opposite, provided for attachment of a closure cap (not shown) end face 4 of the tub 1 is open. The tub bottom 2 is in the form of waves 5 (in 1 indicated by dashed lines) formed ribbed and has a (dashed lines shown) central opening 6 for receiving a hub for the washing drum bearing. At the peripheral edge of the tub floor 2 is a first retaining ring 7 formed. A second retaining ring 8th is located on the opposite open front side 4 of the tub 1 ,

During the tub bottom 2 with molded-on first retaining ring 7 and the second retaining ring 8th are comparatively thick-walled (for example, 4 mm) are formed and made of a glass fiber reinforced polypropylene (PP-GF) is for the tub jacket 3 thin-walled (0.8 mm) organic sheet, here a fiber composite of glass fibers and thermoplastic used. The margins 9 of the organic sheet are used in injection molding in the first and second retaining ring 7 . 8th involved. Preferably, in the respective retaining ring 7 . 8th embedded margins 9 the organo sheet is preformed wave-like, to ensure a secure bond of the tub jacket 3 with the retaining rings 7 . 8th or the tub bottom 2 to ensure. The retaining rings 7 . 8th go to the organo sheet out over a radius R.

The two retaining rings 7 . 8th are also on several lying on the outside of the organic sheet, preferably designed as a U-profile fastening webs 10 connected, on the one hand for attaching fasteners 11 for attaching springs and dampers for the suspended in the washing machine housing tub 1 serve and beyond a stiffening of the tub 1 cause. The fasteners 11 can also be used in whole or in part directly to the retaining rings 7 . 8th be formed. To the retaining ring 8th are also fasteners in the form of screw domes 12 sprayed on for attaching a cap.

Due to the possible by the above-described tub container construction of the tub container jacket 3 from the thin organic sheet can the heat storage capacity of the tub 1 Significantly reduced compared to conventional plastic tubs and thus the energy balance of the washing machine can be improved. A further improvement of the energy balance is achieved by a deposited on the inner surface of the organic sheet, thin (only a few atomic layers thick), the heat-reflecting metal layer, which may for example consist of aluminum. In order to minimize the radiation and convection of the heat in the washing machine housing, the outside of the tub is coated with a low-radiation coating.

LIST OF REFERENCE NUMBERS

1

 tub

2

 Tub floor

3

 Tub Coat

4

open front side of 1

5

Waves (ribbing) of 2

6

Opening in 2

7

 first retaining ring

8th

 second retaining ring

9

 Side edges of the organic sheet

10

 fastening webs

11

 fastener

12

 screw bosses

Claims (10)

Plastic washing tub for a washing machine, comprising a washing tub base ( 2 ) as well as one at a front side ( 4 ) open tub jacket ( 3 ) with on this molded fasteners ( 11 . 12 ) for springs, dampers and a closure cap, characterized in that the lye container shell ( 3 ) consists of organic sheet whose side edges ( 9 ) in a in the injection molding process to the tub base ( 2 ) molded first retaining ring ( 7 ) and one at the open end ( 4 ) molded second retaining ring ( 8th ), wherein the retaining rings ( 7 . 8th ) via on the outside of the organic sheet molded mounting webs ( 10 ) are interconnected. Lye container according to claim 1, characterized in that the inner surface of the tub ( 1 ) is vapor-deposited with a heat-reflecting metallic layer. Liquor container according to claim 2, characterized in that the heat-reflecting layer consists of aluminum. Lye container according to one of claims 1 to 3, characterized in that the outside of the tub is vapor-deposited with a low-radiation layer. Liquor container according to claim 1, characterized in that in the retaining rings ( 7 . 8th ) bound page margins ( 9 ) of the organic sheet are preformed wavy. Lye container according to claim 1, characterized in that the fastening webs ( 10 ) are designed as a U-profile. Lye container according to claim 1, characterized in that the fastening means ( 11 ) for springs and dampers on the fixing bars ( 10 ) and / or the retaining rings ( 7 . 8th ) are mounted. Lye container according to claim 1, characterized in that on the second retaining ring ( 8th ) Fastening means in the form of screw domes ( 12 ) are formed for attachment of the closure cap. Lye container according to claim 1, characterized in that the organic sheet is a high-strength thin-walled composite of a thermoplastic material and glass or carbon fibers. Lye container according to claim 1, characterized in that the lye container bottom and the retaining rings and fastening webs consist of a glass fiber reinforced thermoplastic material.

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