DE8805436U1 - Use for drying and/or kilns - Google Patents

Description

PATENT ATTORNEYS ZENZ, HELBER & HOSB«5H'*D 43 ESSgKl 1 · AlCf RÜHRSTEIN 1 · TEL: (02 ΓΙΛ) 41OO Page

PETER JOSEF KORZILIUS SÖHNE GMBH & CO. Krugbäckerstrasse 3, D-5431 Mogendorf

Use for drying and/or kilns

The invention relates to an insert for drying and/or firing kilns, consisting of a ceramic molded part blank and a carrier element on which the molded part blank is placed.

In known applications of this type, the freshly demolded blank is placed on a carrier element that has already been fired and is therefore relatively dimensionally stable, which is then reused after the firing process to fire further molded parts. This known procedure is not without problems. During the drying and firing process, the molded part shrinks, while the already fired carrier element retains its shape essentially unchanged. The result is that the desired shape of the molded part can often only be produced inaccurately or with errors after firing. In tiles, errors often arise in the form of raised or drawn-down corners, warped surfaces or uncontrolled surface guides. In technical ceramics, such defects are not tolerable and lead to rejected molded parts.

The invention is based on the object of providing an insert in which the ceramic molded parts reliably have a dimensionally accurate and controlled shape even after drying and firing.

For this purpose, the insert according to the invention is characterized in that the carrier element is designed as a blank made of ceramic material.

According to the invention, it is ensured that the drying and

When firing the freshly demolded blank, the shrinkage phenomena that are unavoidable in the blank that serves as the firing aid and forms the support element take place in the same way as in the molded part blank. The adjacent surface areas of the molded part and support element therefore maintain their complementary shape throughout the entire firing process and the molded part is supported consistently. The invention ensures that the defined shape is maintained in all phases of the manufacturing process. The support element cannot be reused after firing.

In order to optimize the identical shrinkage process of the molded part and the carrier element, a further development of the invention provides that the blank forming the carrier element is made of material with essentially the same coefficient of thermal expansion, preferably of the same material as the molded part blank.

The invention is particularly suitable for molded parts with grooved and/or stepped and/or curved base surfaces, which are supported and supported by dimensionally precisely corresponding negative surfaces of the blank forming the carrier element.

Preferably, the blank forming the carrier element has a substantially flat support surface.

The invention is explained in more detail below with reference to the drawing. The drawing shows:

Fig. 1 an embodiment of an insert in an exploded view, namely a molded part in the form of a wing tile with a Z-shaped cross-sectional profile over a suitable carrier element,

whose upper side has the negative shape of the underside of the wing tile; and

Fig. 2 the insert with the stacked blanks of the molded part and the carrier element during the firing process.

In Figure 1, the wing tile 1 forming the molded part and the support element 2 are shown at a distance above each other. Both parts 1 and 2 basically have corresponding shapes after demolding, i.e. before firing in a kiln, and after firing. By firing both parts 1 and 2 at the same time, the shrinkage is the same in both cases.

Figure 2 shows the complementary placement of the two parts 1 and 2 during the entire firing process. The drying, firing and shrinkage processes of the molded part 1 and the carrier element 2 run parallel and are absolutely identical, so that the surfaces lying on top of each other (bottom 3 of the molded part 1 and top 4 of the carrier element) also retain their complementary design.

The support element has a flat base surface 6, which can easily be placed on suitable horizontal support elements in a kiln.

The relatively thin and accordingly sensitive wing tile 1 is supported over a large area in all areas, including in the area of its various grooves (central groove, edge grooves 7) as well as in all flat sections, whereby raised or pulled-down corners are reliably prevented, as well as warping or other uncontrolled behavior of the molded part 1.

Claims (6)

PROTECTION CLAIMS 1. Insert for drying and/or firing kilns, consisting of: a ceramic molded part blank and a carrier element onto which the molded part blank is placed, characterized in that the carrier element (2) is designed as a blank made of ceramic material. 2. Kinset according to claim 1, characterized in that the blank forming the carrier element (2) consists of a material with essentially the same coefficient of thermal expansion, preferably of the same material as the molded part blank. 3. Insert according to claim 1 or 2, characterized in that grooved (7) and/or stepped and/or curved bottom surfaces (3) of the molded part blank (1) are supported and supported by dimensionally precisely corresponding negative surfaces (4) of the blank forming the carrier element (2). 4. Insert according to one of claims 1 to 3, characterized in that the upper side (4) of the blank forming the carrier element (2) has a design complementary to the entire underside (3) of the molded part blank (1). 5. Insert according to claim 3 or 4, characterized in that the entire vertical projection of the molded part blank is underpinned and supported by the bar forming the carrier element. 6. Insert according to one of claims 1 to 5, characterized in that the blank forming the carrier element (2) has a substantially flat bottom surface (6).