JPH01212888A - Heat treating furnace - Google Patents

Abstract

PURPOSE:To enable a plurality of substance or substance groups to be treated to be individually moved to be let in a furnace, by a method wherein a charge port and a take-out port are formed so that a charging direction line does not coincide with a take-out direction line, and a means to take out the substance to be treated in a furnace from a position on the charge direction line and moved to a position on the take-out direction line is provided. CONSTITUTION:In a heat treatment furnace, a substance G to be treated is fed in a furnace through a charge door 2 by means of a push rod and the like and placed on a charge direction line 4 and is transferred to a position on a take-out direction line 6 by means of a push rod 5 extending at right angles with a furnace wall, having a charge door 2, and through the furnace wall. The charge door 2 is opened again to place the substance G to be treated on the charge direction line 4 in the furnace, and when a given treating time for the substance G to be treated on the take-out direction line 6 elapses, the substance G to be treated is taken out from a take-out door 3 to the outside of the furnace by means of a take-out rod. This constitution enables the substance to be treated to be placed in two spots on the charge direction line and the take-out direction line at least in the furnace, enables orderly application of the same heat treatment on the substance to be treated by an assembly-line operation system in a state in which the substance to be treated is present in each furnace, and may open only a door between the present and subsequent furnaces when the substance to be treated is transferred to the subsequent furnace.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a heat treatment furnace for heat treating objects to be treated such as shaped glass.

[Conventional technology]

Conventionally, a heat treatment furnace as shown in the cross-sectional view of FIG. 5 is generally used, which has only one access door 1 on the side wall. Such a furnace is one in which the workpiece G is loaded and taken out at once through the loading/unloading door 1, and is used alone, so it requires heat treatment at multiple different temperatures like glass. For objects to be treated, the temperature inside the furnace must be changed by a timer or sequence control.Such furnaces require a control device to change the temperature inside the furnace according to the heat treatment sequence. In order to shorten the transition time to a different temperature, it is necessary to increase the amount of heat generated by the heater or actively cool it down, which not only increases equipment and operation costs, but also increases the cost of equipment and operation.
Because the heat capacity of the furnace is large, overshoots and undershoots tend to occur when transitioning to a different set temperature (therefore, there is a problem of poor stability of the temperature inside the furnace. 4. Therefore, it is possible to solve the above problem. An extrusion furnace as shown in the cross section of Fig. 6 is also used.
Since it is taken out from the furnace through the take-out door 3, similar furnaces can be successively connected to the take-out door 3 side, and by setting different temperatures for each furnace,
The problem in the furnace of FIG. 5 can be solved. In addition, when connecting multiple furnaces, it is preferable to use a sliding door at least for the connecting door rather than a rotating door like the one shown in the figure. It goes without saying that in heat treatment furnaces, it is preferable to share the furnace wall and door of the connecting portion with adjacent furnaces.

[Problem to be solved by the invention]

The simplest means of moving the workpiece G in the furnace as shown in FIG. It is a means of pushing and moving.

Thereby, even when a plurality of furnaces are connected, the workpiece G can be easily moved to the next furnace. However, in a furnace like the one shown in Figure 6, the loading direction line and the unloading direction line coincide, and the movement of the processed material from loading to unloading is in a straight line, which means that multiple furnaces are connected. Since the case is the same, there is a problem in that whether it is a single object or a plurality of objects are connected, only one object or a group of objects G to be processed, which are moved in the same way as one object, can be put into the heat treatment furnace. In addition, when multiple furnaces are connected, when transferring one or a group of workpieces G to the next furnace, not only the entrance door of the next furnace but also all the doors from the input door 2 to the next door. There is a problem in that not only the temperature of the furnaces before and after the transfer will fluctuate, but also the temperature of the furnaces before it will also fluctuate.

The present invention has been made in order to solve such problems, and it is possible to move the workpieces in the furnace by simple means, and it is possible to move the workpieces in the furnace by a plurality of objects or a group of objects that are moved separately into the furnace. In the case of a heat treatment furnace consisting of multiple furnaces connected, heat treatment can be carried out while there is a workpiece in each furnace, and when the workpiece is transferred to the next furnace, To provide a heat treatment furnace in which only the inlet door of the next furnace needs to be opened.

[Means to solve the problem]

- The present invention provides a heat treatment furnace in which objects to be treated are introduced into the furnace through input ports provided on the side walls and taken out from the furnace through an output port. A heat treatment furnace is provided with a take-out port and a means for moving a workpiece placed into the furnace on a line in the feed direction so that it can be taken out of the furnace, The configuration achieves the above objective.

[For production]

That is, in the heat treatment furnace of the present invention, the objects to be treated can be placed at least in two places, one on the input direction line and one on the takeout direction line in the furnace, and when multiple furnaces are connected, there is one object to be treated in each furnace. It is possible to sequentially apply the same heat treatment to the objects to be treated using a state-of-the-art assembly line system, and when transferring the objects to the next furnace, only the door between them needs to be opened.

〔Example〕

The present invention will be explained below with reference to embodiments shown in cross-sectional views in FIGS. 1 to 4.

In the heat treatment furnace shown in FIG. 1, the workpiece G is fed into the furnace through a charging door 2 using a push rod (not shown), placed on a charging direction line 4, and then perpendicular to the furnace wall where the charging door 2 is located. The push rod 5 penetrating the furnace wall moves it onto the take-out direction line 6, then the loading door 2 is opened again to place the next workpiece G on the input direction line 4 in the furnace, and the workpiece is moved onto the take-out direction line 6. When the predetermined processing time for the workpiece G on the top 6 has elapsed, the workpiece G is taken out of the furnace through the take-out door 3 using a takeout rod (not shown), and then pushed again onto the input direction line 4 using the push rod 5. The workpiece G is moved onto the take-out direction line 6, and the loading door 2 is then opened again to place a new workpiece G onto the input direction line 4 in the furnace. After the predetermined heat treatment time for object G has elapsed, the removal door 3 is opened again.
The workpiece G is then heat-treated in an assembly-line operation, such as when the workpiece G is opened and the workpiece G is taken out of the furnace.

Therefore, in the heat treatment furnaces shown in FIGS. 5 and 6, the material to be treated is loaded and taken out only once per predetermined heat treatment time, whereas in the heat treatment furnace shown in FIG. Retrieval is performed.

The heat treatment furnace shown in FIG. 2 also has a charging direction line 4 from the charging door 2.
The workpiece G placed above is moved to position 8 on the third direction line 7 by the push rod 5, and there the next workpiece G is put in through the input door 2, and then the next workpiece G is moved to the position 8 on the third direction line 7. The workpiece G at position 8 is moved by the push rod 9 to the intersection position 10 of the third direction line 7 and the take-out direction line 6, and the workpiece G on the input direction line 4 is then moved to position 8 by the push rod 5. Next, a new workpiece G is put in, and when a predetermined time has elapsed since the workpiece G at position 10 was put into the furnace, it is taken out from the removal door 3, and the workpiece G at position 10 is taken out from the furnace. The workpiece G at position 8, and the feeding direction line 4 at position 8.
After the upper workpieces G are transferred one after another in the same manner as described above, a new workpiece G is put in through the input door 2, and heat treatment is performed on the stage. In this heat treatment furnace, loading and unloading is performed three times at every predetermined heat treatment time. In this heat treatment furnace, the workpiece G that is first put in through the input door 2 is moved to position 10 via position 8, and then the next workpiece G is put in through the input door 2 and moved to position 8, and then Alternatively, the first workpiece G may be put into a platform into which a new workpiece G is put through the input door 2.

The heat treatment furnace shown in FIG. 3 is the same as the heat treatment furnace shown in FIG. 2 in that the workpiece G is sequentially moved to position 10, but
0 is the intersection position of the third direction line 7 and the fourth direction line 11, and the workpiece G moved to the position 10 further crosses the fourth direction line 1.
The point in FIG. 2 is that the product is moved to a position on the take-out direction line 6 by the push rod 12 on the top 1, waits for the elapse of a predetermined time from when it was put into the furnace at that position, and is then taken out from the take-out door 3. Different from heat treatment furnace. In this heat treatment furnace, loading and unloading is performed four times at every predetermined heat treatment time.

The heat treatment furnace shown in FIG. 4 is like a plurality of heat treatment furnaces shown in FIG. direction line 4
The workpieces G on the takeout direction line 6 are moved from above onto the takeout direction line 6, and the workpieces G on the takeout direction line 6 are sequentially moved to the platform where they are put into the next furnace using the push rod 13, and then the workpieces G are moved into the next furnace. When the predetermined heat treatment for the workpiece G that has reached the takeout direction line 6 is completed, the workpiece G is taken out from the takeout door 3 by the push rod 13 on the takeout direction line 6, thereby performing heat treatment. be. That is, in this heat treatment furnace, the take-out direction line 6 of the connected previous furnace becomes the input direction line 4 of the next furnace. When transferring the workpiece G to the next furnace in this heat treatment furnace, only the partition door 14 between it and the next furnace needs to be opened. In this case, temperature fluctuations when the workpiece G is transferred to the next furnace can be limited to only the furnaces before and after the process.

In addition, when this heat treatment furnace performs heat treatment at a plurality of temperatures, it is preferable to determine the number of furnaces at each temperature so as to be proportional to the treatment time at each temperature.

As a result, the residence time of the workpiece G in each house can be made equal, and 2×(number of furnaces) of workpieces can be loaded and taken out per required heat treatment time. The same procedure is applied when the temperature of each house is the same.

Needless to say, extraction is performed. Further, the partition door 14 between the furnaces having the same temperature may not be provided. When heat treatment is performed at multiple temperatures using this heat treatment furnace, it is only necessary to maintain the temperature of each unit at a predetermined temperature, so the problems encountered when heat treatment is performed using the heat treatment furnace shown in Figure 5 are eliminated. Needless to say.

It goes without saying that the furnace of FIG. 3, in which the loading direction line 4 and the unloading direction line 6 are parallel and deviated from each other in the same manner as the furnace of FIG. 1, can be connected in plurality like the furnace of FIG. There is no need to exemplify that a plurality of furnaces as shown in FIG. 2, in which the direction lines 6 and 6 intersect with each other, can be connected to produce the same effect.

Furthermore, it will be appreciated that furnaces such as those shown in FIGS. 1-3 may be connected in combination.

The loading door 2 and the take-out door 3 in FIGS. 3 and 4 are sliding doors with an opening/closing operation part provided on the outside or above the furnace, and the partition door 14 in FIG. It is a sliding door with a section.

〔Effect of the invention〕

The heat treatment furnace of the present invention is capable of moving the objects to be treated in the furnace by means such as an hour wheel, and can contain a plurality of objects or groups of objects to be moved separately in the furnace. In the case of a heat treatment furnace consisting of connected furnaces, heat treatment can be performed with the object to be treated in each door, and when transferring the object to the next furnace, only the entrance door of the next furnace needs to be opened. It has excellent effects.

[Brief explanation of the drawing]

1 to 4 are cross-sectional views showing examples of the heat treatment furnace of the present invention, and FIGS. 5 and 6 are cross-sectional views showing examples of conventional heat treatment furnaces, respectively. 2... Loading door, 3... Taking out door, 4
... Loading direction line, 5,9,12.13... Push rod, 6... Taking out direction line, 7... Third direction line, 11... Fourth direction line, 14... Partition door.

Claims (1)

[Claims] In a heat treatment furnace, objects to be treated are introduced into the furnace through input ports provided on the side walls and taken out from the furnace through an output port.
The input port and the output port are provided so that the input direction line and the output direction line do not coincide, and the workpieces placed in the furnace on the input direction line are moved onto the extraction direction line so that they can be taken out of the furnace. A heat treatment furnace characterized by comprising means for