DE2730479A1 - Tunnel oven truck loading equipment - has tracks and shelves with loading machine parallel to track through oven - Google Patents

Abstract

The equipment loads and unloads a truck travelling with ceramic blanks through a tunnel-type oven on rails, and then returns via sliding and travel rails in a closed circuit. Items are included for buffer storage of blanks and burnt items. Parallel to the oven is a rail track, connected at the ends by means of sliding platforms that passes through the oven. Also parallel to the oven is an auxiliary track. A set of storage shelves are included with which a loading and unloading machine works. A work table is included for the assembly of the blanks on pallets, and for unstacking them after heat treatment.

Description

n System for loading and unloading a tunnel kiln

assigned kiln car as well as for the intermediate storage of the goods n The invention relates to a system for loading and unloading of a tunnel furnace associated with this on a working track and outside the same on shifting and Kiln cars returned to the working tracks in the circuit, which are connected to the kiln entrance side of the tunnel the ceramic raw material to be fired infeed and on the output side discharge the fired finished product, as well as for the interim storage of this product. Such Intermediate storage is required that the loading with raw material and / or the fired finished product is not accepted at the same time, like the throughput of the goods through the tunnel kiln. While a tunnel oven, he be now heated electrically or with gas, a considerable amount due to its heat capacity If heating-up time is required, it can be run in continuous 24-hour operation. By a change in the oven temperature and according to the cycle time of each Charge through the tunnel kiln, its throughput can be within certain limits vary; but that is not enough to adapt to the considerably larger ones To achieve fluctuations in loading and removal. Unless it is the firing of building ceramics is concerned, the ceramic pipe material, i.e. the unfired, pre-dried goods are first removed from the cassette and sorted by hand before it is loaded onto a kiln car at the place where it is set. Unless it is tableware grinding and glazing is also required.

On the other hand, the fired goods have to be unstacked from the kiln car and be packed.

The above work is usually carried out in an 8 hour sorting operation performed, usually five days a week while no work is done on the weekend.

This has in connection with the 24-hour operation of the tunnel kiln As a result, so much goods are sorted during the 8-hour sorting operation must be how the tunnel kiln processes in 24 hours. Beyond that, however, must During the five-day week in the 8-hour sorting facility there was still so much goods more can be made available, such as the tunnel kiln on the two 24-hour weekends processed.

On the other hand, the tunnel kiln throws continuously in 24-hour operation Burned out goods, which are then sorted out during the 8-hour sorting operation and packaged. In addition, the tunnel kiln throws during the weekend (and of course also on public holidays if necessary) more and more burned ones Goods out, which then have to be sorted and packed in the next working week.

This different way of working of the sorting company and the Oven operation requires a buffer or a warehouse with a significant Capacity. This warehouse is opened at the end of the 8-hour sorting operation on last working days of the week completely or almost completely with unfired Raw materials must be occupied and must be done by the beginning of the first shift of Sorting operation of the coming working week are sufficient.

At the start of the working week, the warehouse will then contain or in full almost completely the finished product fired by the tunnel kiln on the weekend.

Corresponding problems do not only occur in an 8-hour sorting operation and a 24-hour furnace operation, but whenever the sorting operation is not able to match the throughput of the continuously operating furnace.

So far one has helped oneself for this in such a way that one runs parallel to the tunnel kiln not only provided a single working track to which the kiln carriages were connected via a sliding platform from the tunnel kiln or from which the kiln cars were fed via a second transfer table were fed to the entrance side of the tunnel kiln, but one saw a number such tracks as storage tracks and occupied these tracks with a corresponding one Number of kiln cars, which are then each from the entrance side of the tunnel kiln retrieved and fed to these or from the exit side of the tunnel kiln were occupied. These storage tracks were in turn ordered with kiln cars that were loaded with the ceramic raw material on a seating area.

On the other hand, the working track was also used to remove the fired ones Goods by placing a kiln car containing these fired goods either directly from the Exit of the tunnel oven via the Transfer platform fed to the working track or a kiln car was taken over from one of the warehouse tracks.

A plurality of tracks were required for this, and above all one large number of kiln cars and larger transfer platforms. This created an increased Space requirements and, in particular, a high capital requirement.

The invention is based on the above-mentioned disadvantages to eliminate and to create a system of the type mentioned at the outset, which provides temporary storage the raw goods as well as the finished goods, each of which occurs in different quantities in batches, on a considerably smaller footprint as well as with a considerably reduced Number of kiln cars and thus the invested capital.

The plant according to the invention comprises a parallel to the tunnel kiln Shifting track, which at its ends over ski platforms with the one that runs through the tunnel kiln Working track is connected, an auxiliary track running parallel to this for a Storage and retrieval vehicle, one storage rack running parallel to the auxiliary track and one parallel to this running work table for putting together the ceramic raw material on pallets as well as for destacking the fired finished product. In such a plant will be by arranging a storage rack that stores the goods on several floors one above the other absorbs and optimally uses the floor space of a factory hall that was previously required number significantly reduced from kiln cars. Suffice it now to have a tunnel oven over his the entire length is fully occupied with kiln cars, outside of it there are still a few to add a few kiln cars, which then come from the exit side of the tunnel kiln brought a transfer platform to the shifting track and from there via a second one Transfer table can be fed back to the entry side of the tunnel kiln.

The initially empty kiln car located on this shifting track is of the storage and retrieval truck, which can be moved along its auxiliary track and in is known per se in a position on both sides of the auxiliary track in different Heights of picking up goods or putting them down again, loading. The storage and retrieval truck takes get these goods from the work table, where they are easier to use, if necessary Pallets, has been sorted and the goods are placed on top of each other on several levels the kiln car. The goods can be placed on metal plates or fireclay plates that run through the tunnel furnace together with the goods. After leaving of the kiln car from the tunnel kiln and shifting over the transfer table onto the Shifting track, the rack conveyor is driven to the kiln car, takes the burnt goods from this and places them on the other side on the work table away.

As soon as the work table is filled, the storage and retrieval vehicle sets the following fired goods in the storage rack from which it is them then can later be taken out again if necessary and brought onto the workbench.

The storage and retrieval vehicle therefore drives up continuously while the furnace is in operation back and forth along the auxiliary track and loads or unloads the kiln cars.

Provided that more sorted goods are placed on the workbench's seat than can be fed into the tunnel kiln via kiln cars that are available the storage and retrieval vehicle these raw goods and sets them down on the storage rack until the tunnel kiln again has a need for raw materials that cannot be covered from the setting station.

Instead of the many kiln cars with their storage tracks that were previously required Now only a simple fixed storage rack, an auxiliary track with a rack conveyor and a work table is required. The storage and retrieval vehicle must operate 24 hours a day, like the tunnel kiln, operated while working at the work table on short shifts can be restricted.

It has been shown that this solution causes very considerable costs can be saved. In addition, the inventive plant also takes a significant takes up less space than the well-known system with several storage tracks and one Variety of kiln cars. The storage rack can take up the space of the Utilize the factory floor to the ceiling and look like a forklift truck the goods are filled or re-filled to any desired height emptied.

The work table can either be used as a fixed table with one or more Sbtzplatz for sorting and provision of the raw material as well as, at the other end, with one or more places to take it off and, if necessary, to pack it of the fired goods.

However, the work table is preferably designed as a roller conveyor, on which the plates with goods placed in one or more places Depending on the Wish can be continued.

It is also preferably provided that the storage rack and the work table as well as the auxiliary track for the storage and retrieval vehicle and the shifting track for the kiln cars extend over the same length as the tunnel kiln or how the track running through this tunnel kiln and protruding at both ends.

The invention is explained in more detail below in an exemplary embodiment explained. In the drawing show: Fig. 1 shows a system of known Type with a large number of storage tracks and kiln cars, and FIG. 2 shows an inventive System.

The system shown in Fig. 1, the individual parts of which are only schematically are shown, comprises an elongated tunnel furnace 1, which is shown in Embodiment has a length of 80 m. Extends through the tunnel kiln there is a track 2, over which the kiln cars 12 are moved in the direction of the arrow. Of the When fully occupied, the kiln contains and is about forty such kiln cars traversed by each car in a time of about 30 hours.

There is a transfer table on the entrance side of the tunnel kiln 5 with a corresponding transport vehicle, but not shown in the figure is, and is able to individually furnace rolls from the storage tracks to be mentioned to take over and the entrance side of the track 2 to feed.

Correspondingly, on the exit side of the tunnel kiln, rm At the end of track 2, a second transfer table 6, which drives out of the tunnel kiln Oven car 12 takes over individually and on one of the storage tracks 7, 8, 9, 10 or else immediately spends on working track 11. On the working track 11 can a The kiln car supplied by the transfer platform 6 can be unloaded at the unloading point 14. The fired finished product is then transported away, sorted and if necessary packed up.

If the tunnel kiln throws out more kiln cars than at the Unloading point 14 can be unloaded, the transfer table 6 brings this kiln car on one of the storage tracks 7 to 10, from which she was later fetched and can be brought to the working track 11.

At the point 13 is the place where the incoming Raw materials are sorted and loaded onto a kiln car in levels. The kiln car then becomes the transfer table 5 and from there either directly into the tunnel kiln 1 brought or if the furnace no longer accept the kiln cars that have been fed in can, pushed onto one of the storage tracks 7 to 10. If required later, the The kiln car is then removed from the storage tracks and fed into the kiln.

In the system according to the invention shown in FIG. 2, again a tunnel furnace 1a with track 2a is provided, which is on the one hand from the transfer table 5a is supplied forth with kiln car 12, while on the exit side of the tunnel kiln 1a the outgoing kiln cars are taken over from the transfer platform 6a and onto the working track 15 are fed. With this layout there is only one single working track 15, that in general not complete with kiln car must be occupied. The system also includes an auxiliary track 18 over which a storage and retrieval vehicle 19 known design is displaceable. The shelf conveyor can be driven by its own power drive to each point and is provided with a gripping and holding device, who either accept these goods from a kiln car loaded with fired goods and put it in another place or put the unfired raw material in an empty kiln car can feed.

The raw material is sorted again at the setting station 13a of a work table 17 and provided and there taken over by the storage and retrieval vehicle 19 that either delivers the goods a kiln car 12 or a shelf 16 set up along the tunnel kiln 1a.

Correspondingly, the rack conveyor 19 sets the fired goods on the Workplace 14a of the work table 17 from where the goods are sorted and packaged and is forwarded.

As indicated in Fig. 2, the work table 17 is a roller table educated. It is then not absolutely necessary that the storage and retrieval vehicle 19 to pick up unfired raw material is moved to the setting place 13a. Much more can be placed on the roller table at point 13a or at neighboring workplaces Placed goods are also moved on via the roller table and fed to the storage and retrieval vehicle will.

Accordingly, there is no need to put down the fired goods the storage and retrieval vehicle 19 must take place at the point 14a.

This results in a more flexible way of working and, above all, also the possibility of several workers for sorting and unstacking at the work table 17 and thus better utilize its length.

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Claims (3)

Patent claims 1. System for loading and unloading a tunnel kiln assigned, these passing through on a work track and outside the same Kiln cars returned to the circuit on shifting and working tracks for picking up it to fired ceramic raw material or the fired finished product as well as for intermediate storage These goods differ from the throughput through the tunnel oven over time Loading or removal, g e k e n n n z e i c h n e t d u r c h a parallel to the Tunnel furnace (la) running sliding track (15), which at its ends via push beans (5a, 6a) is connected to the working track (20) running through the tunnel kiln, an auxiliary track (18) running parallel to this, one running parallel to it Storage shelf (16) for a shelf unit (19), a work table running parallel to it (17) for putting together the ceramic raw material on pallets and for destacking of the fired goods. 2. Plant according to claim 1, d a d u r c h g e k e n nz e i c h n e t that the work table (17) is designed as a roller conveyor. 3. Plant according to claim 1 and 2, d a d u r c h g e k e n z e i c h n e t that the shifting track (15), the auxiliary track (18), the storage rack (16) and the worktable extend approximately the same length as the tunnel oven.