DE1280802B - Lack trough - Google Patents

Description

Mangle tray The invention relates to a mangle tray with one of the Inner ironing surface plate adapted to the roll curvature, on the outside of which there are heating channels are welded on with an open cross-section.

In the case of a known mangle trough (see German patent specification 550 844) are the heating channels with an open cross-section facing each other abutting long sides welded onto the outside of an inner ironing surface plate, wherein the heating channels are entirely surrounded by a heat insulating compound, which to prevent heat radiation to the outside air. Each of the heating channels is open at both ends, so that a large number of independent flow channels are formed. The disadvantage of the known arrangement is essentially that that there is no possibility of z. B. arising when ironing laundry Sucking off steam that is between the ironer trough when the laundry passes through and form a counterpart. There is another disadvantage of the known arrangement that the individual heating channels are independent of each other, which is difficult with regard to a uniform application of the heating channels and also difficulties in connection with the supply of the heating medium to the heating ducts brings.

For other known deficiency troughs (see British patents 573 184 and 634 242) are tubular profiles or the like on the outside of the ironing surface z. B. fastened by welding, and thermal insulation is also provided are. Even with these known mangle troughs there are no suction devices provided by swaths forming during operation of the ironer trough, wherein It is also disadvantageous for reasons of heat transfer that the tubular Heating medium flowing through the heating channels does not come into direct contact with the ironing surface comes because the tubular heating channels are not open to the ironing surface. The same disadvantages are essentially also found in a further known one Lack trough, (see. USA. Patent 1769 009) before, also on the outside tubular, adjacent heating channels are attached to the ironing surface, which are connected at their ends by means of connecting pieces in the form of pipe elbows are, so that a total of a serpentine heating channel is formed.

In another known ironer trough (see US Pat. No. 1757 344), the trough-shaped ironing surface is composed of several arcuate sections, each arcuate section having alternating heating and suction channels. Each of these heating and suction channels is essentially box-shaped, with pure heating sections being distributed over the circumference of the ironer trough alternating with pure suction sections, which is disadvantageous insofar as no suction takes place in the area of the pure heating sections and, on the other hand, no heat supply is possible in the area of the suction sections .

This well-known lack trough, with which, moreover, no thermal insulation is provided, is also relatively expensive and complicated to manufacture.

In another known ironer trough (see US Pat. No. 2,057,988), chamber-like steam rooms or heating rooms are provided on the outside of the ironing surface, with the heating chamber wall 5 forming the ironing surface plate being provided with several suction channels at a distance from one another through which Slits provided in the ironing surface plate, which vapors or fumes that form during operation of the ironer are withdrawn. In this known ironer trough, the ironing surface provided with the suction channels creates considerable difficulties during manufacture, and the conditions with regard to the mechanical strength of the ironing surface are unfavorable due to the relatively large steam and heating chambers. There is also a mangle trough acted upon on both sides (cf. French patent specification 1139 060), in which the trough is formed from individual rigid parts which are spaced apart in the circumferential direction of the trough and are fastened at the ends.

The invention is based on the object of creating a mangle trough, which does not suffer from the disadvantages of the known arrangements; the manufacturing method should be simplified without affecting the mechanical strength of the ironer trough, d. H. in particular the ironing surface, is reduced, at the same time also the attachment of both the heating channels and the attachment of suction holes should be achieved cheaply. In connection with the production method should continue the advantage can be created that a modular construction can be achieved without further ado lets to order depending on the needs of each individual establishment in which the mangle trough should be used, which is based on the respective operating conditions to be able to make the necessary adjustment in a simple manner. The lack trough should also have a favorable thermal efficiency.

To solve the problem underlying the invention is a Deficiency trough suggested that by combining the following, known for itself Features is characterized, namely that the heating ducts as spaced from each other Longitudinally split hollow profiles welded onto the outside of the ironing surface plate, Angular profiles od. Like. Are formed that the heating channels on their the Ironing surface plate facing away from the rear surface have an insulating layer that in the distances between the heating channels suction holes in the ironing surface plate are, and that the ends of the individual heating ducts alternately by connecting pieces are interconnected to form a serpentine heating system.

The inventive design of the ironer trough results once a favorable production method, so that on the other hand one easily Can achieve modular construction, the individual trough plates through the heating channels are substantially stiffened, so that there are therefore slight distortions, and where at the same time the attachment of both the heating ducts and the attachment of the Allow extraction holes to be achieved cheaply. It also becomes a favorable thermal efficiency achieved in that the individual heating channels above the suction air flow by simple means can be shielded by an applied insulating layer: Furthermore, the Production of the serpentine heating channels is possible in a simple manner by that the intermediate pieces are made from the same profile, in particular angled profile like the actual heating ducts, so that, as already mentioned, all in all particularly favorable manufacturing methods with good thermal efficiency and can be achieved with a high degree of freedom from distortion of the entire trough.

If it is a mangle trough with ironing surfaces acted on on both sides is, it is advantageously provided that a second, the first in the structure corresponding ironing surface plate with opposite curvature with the first ironing surface plate is connected to form a vent gap.

An embodiment of the invention is described in the following description on hand - explained in more detail by drawings. It shows F i g. 1 shows a cross section through a basic element of the ironer trough perpendicular to the axis of the cooperating with the trough Cylinder; F i g. 2 is a developed view of a section of a trough element, in which the wall provided with the ironing surface is omitted in order to complete the arrangement to recognize the heating duct in the form of a snake; F i g. 3 a section after Line HI-III in FIG. 2; F i g. 4 on a larger scale a section through one Part of the trough element with a thermally insulated heating channel; F i g. 5 one unwound View of a trough formed from two basic elements, one with the ironing surface provided wall is omitted; F i g. 6 a section along the line VI-VI in Fig. 5.

In the illustrated embodiment, each base element of a ironing or heating trough has a concave ironing surface plate 1 with a machined (polished) outer surface and a convex ironing surface plate 2 , which is connected to the plate 1 by end wall elements 3 and 4. Two end flanges 5 and 6, which are united with the plates 1 and 2 and the walls 3 and 4, close the box forming the basic element.

On the inside of the plate 1, the longitudinal edges of the longitudinally divided Hollow profiles in the form of angle profiles 7 welded, each of which with the corresponding portion of the inner surface of the plate 1 one shot of the serpentine Forms heating channel.

If the convex part of the trough is also used, the plate 2 can also have a heating duct system which is similar to that associated with the plate 1 and is shown in FIG. 1 is indicated by dashed lines.

Each of the connections between the individual heating channels 8 of the serpentine heating channel system is thereby obtained that the adjacent legs of two adjacent angle profiles 7 are cut obliquely and symmetrically to each other and here an inclined plate-like connector l0 is welded, which has a trapezoidal shape and its Base edges with the plate 1 and the corresponding flange 5 or 6 and their side edges with the aforementioned legs at 9 -welded.

The legs of the angle profiles 7 are in the form of thermal insulation an insulating cladding 11 (Fig. 4) provided, the heat losses inside counteracts the box forming the basic element.

In the embodiment according to P 'i g. 5 has each primitive two symmetrical heating coils, each with an input 13 and a common one Have exit 13.

In Fig. 5 and 6 are the two trough elements with their backs their flanges 5 connected by bolts 14, while on the flanges 6 support brackets are appropriate. Between the shots of the heating coils, the the ironing surface forming plate l holes 16, which the suction of the steam serve, which are located between the cylinder and the heating hob during the passage of the laundry form, the interior of each basic element through (openings 17 (Fig. 1) with Suction devices (not shown) is in connection.

Claims (2)

Claims: 1. Ironer trough with an inner ironing surface plate adapted to the roll curvature, on the outside of which heating channels with an open cross-section are welded, gekenn -zaichnet by the combination of the following, per se known features, namely that the heating channels (8) are spaced apart from one another on the outside The ironing surface plate (1) welded, longitudinally divided hollow profiles, angle profiles (7) or the like. Are formed that the heating channels (8) on their rear surface facing away from the ironing surface plate (1) have an insulating layer (11) that in the distances between the heating channels (8) Suction holes (16) are made in the ironing surface plate (1), and that the ends of the individual heating channels (8) are alternately connected to one another by connecting pieces (10) to form a serpentine heating system. 2. Ironer trough according to claim 1, which has ironing surfaces acted upon on both sides, characterized in that a second ironing surface plate (2) corresponding to the first in structure is connected with opposite curvature to the first ironing surface plate to form a suction gap (5). Considered publications: German Patent Nos. 526 689, 550 844, 743 991, 187130, 816 085; German Auslegeschrift No. 1076 073; Swiss Patent No. 281728; French Patent Nos. 1062 319, 1139 060; Belgian Patent No. 538,181; British Patent Nos. 634 242, 573184, 493 700; U.S. Patent Nos. 1769 009, 2169 672, 2,057,988, 1757 344, 1769 010.