DE1904371U - ELECTRICALLY HEATED PRESS PLATE. - Google Patents

Description

532 963 * 29.7.

Stgt.-Feuerbach 21. July 1964 Pat.-My / Sl

WERNER & PPLEIDERER, Stuttgart

"Electrically" heated press platen "

Electrically heated press plates previously known were provided with single-conductor round heating rods. Has been heating These press plates are regulated by means of a temperature sensor, so it was found because of the necessary Distribution according to G-round and regular load for a relatively large one The spatial distance between the three individual single-conductor round heating rods belonging to a unit is considerable temperature thresholds distributed over the plate. These zones with different temperatures did not allow the proper processing of higher quality to be pressed, only small heat tolerances of permissible materials. Another disadvantage of these known press plates was that as a result of the heat radiation at their edges, they exhibited a noticeable heat gradient towards the edge zones. To the To avoid heat radiation and thus the heat gradient

en, or at least reduce, were up to the press plate arranged to the upper position of their stroke reflectors. The success achieved with this was slight. In particular the disabled the reflectors provide access to the press plate and the material to be pressed or already pressed.

The task of the innovation is the construction of an electrically "heated press platen, which has a has a uniform temperature, in particular up to in its peripheral zones, and which is free from work-handicapped people Facilities.

The innovation now relates to an electrically heated press platen, in the case of the three-wire flat-tube heating rods arranged in appropriately designed recesses in the press plate are, whereby temperature thresholds are switched off. Included At the same time, the larger compared to round heating rods has an effect:. The surface of the three-wire flat tube heating rods is favorable.

It is also proposed according to the innovation that the three-wire flat-tube heating rods in the direction of the edges of the press plate with increasingly decreasing distance and / or on Edge of the press plate are arranged with a smaller distance from each other, whereby a stronger heating of the edge zones the press plate is made possible and the losses caused by heat radiation are compensated for that the press plate shows the same temperature up to the edge zones.

Furthermore, according to the innovation, the three-wire flat-tube heating rods are angled with their flat sides to the surface of the Press plate arranged, creating a very tfce friction against one another the three-wire flat tube heating rods is made possible.

One embodiment of the innovation is that for two or more three-wire flat tube heating rods a common one Recess is provided and that between the three-wire flat tube heating rods located in a common recess Filler pieces are arranged, whereby the production is simplified to the aforementioned advantages.

Fach, an advantageous embodiment of the innovation is "at more than two three-wire flat-tube heating rods, the distance between them determined by filler pieces of the same or different thickness ■, whereby an adjustment of the heating in the edge zones the press plate is made possible by the material and shape of the goods to be pressed.

Finally, it is proposed according to the innovation that the three-wire H ^ flat tube heating rods stronger at their ends than in their middle part are bewiekelt, whereby also in the of the The ends of the three-wire flat-tube heating rods were me toe on se hl ag te η Edge zones a stronger heating necessary to maintain the temperature is enabled.

In the drawing, the hiring is exemplary and schematic shown.

Bach of the drawing is formed from an upper plate part 1 and a lower plate part 2, a press plate. In the upper plate part 1, heating or cooling channels 3 and a bore 4 intended for receiving a measurement sensor (not shown in more detail) are provided. In the lower plate part 2 there are three-wire flat-tube heating rods in flat recesses 5 and approximately V-shaped recesses 6? and at the same time for the transfer of heat from the Oreileiter flat tube heating rods 7 to the end of the plate
Upper part 1 are used for filler pieces 8.

As the drawing shows, it is in the edge zones of the press plate a closer sequence of the three-wire flat tube heating rods and thus one compared to the central area of the press plate causes stronger heating.

Protection claims , '

Claims (6)

Protection claims 1) Electrically heated press platen, characterized in that that three-wire flat-tube heating rods (7) are arranged in appropriately designed recesses (5) in the press plate are. 2) press plate according to claim 1, characterized in that the three-wire flat tube heating rods (7) in the direction of the Edges of the press plate (1, 2) with increasingly decreasing distance and / or at the edge of the press plate (1,2) are arranged at a small distance from one another. 3) press plate according to claim 2, characterized in that at a small distance the three-wire flat tube heating rods (7) are arranged with their flat sides at an angle to the surface of the press plate (1, Z) . 4) press plate according to one of the preceding claims, characterized in that a common recess (6) is provided for two or more three-wire flat-tube heating rods (7) and that between the three-wire flat-tube heating rods (7) located in the common recess (6) Filler pieces (8) are arranged. 5) press plate according to claim 4, characterized in that if there are more than two three-wire flat tube heating rods Distance to each other by equal or different strength Filler pieces is intended. 6) press plate according to one of the preceding claims, characterized in that the heating rods at their ends are wound more than in their middle part.