JPH0750166Y2 - Multi-stage press machine - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-stage pressing machine used for hot-pressing plywood, veneer sheets, metal plates (aluminum plates, etc.), synthetic resin plates and other flat materials.

[0002]

2. Description of the Related Art Generally, a multi-stage press machine is provided with a loader / unloader for automatically loading and unloading workpieces such as plywood. In the past, many multi-stage press machines of this type were equipped with push bars that were inserted between the heating plates at each stage of the pressing machine while pushing the plywood as the feeding mechanism of the loader. It was

[0003]

However, in the conventional multi-stage press machine, the above-mentioned push bar is suitable for inserting one relatively large-area plywood into the space between the heating plates of each stage. However, two or a few relatively small-area plywood or thin veneer sheets, etc. are inserted into the space between the heating plates so that the pressing pressure is evenly applied. Placing it on the hot platen at a certain position was a difficult structure even if it was improved.

That is, in the conventional multi-stage press, a plurality of products to be treated (plywood, single-sheet, etc.) are arranged on a single-stage hot platen so that the pressure load becomes even, and the hot pressing is performed together. It has a drawback that it is not suitable for the process of tightening.

For this reason, conventionally, a method of manually arranging a plurality of plywood sheets, a single plate sheet or the like in each of the hot plates at each stage as quickly as possible, and then shifting to hot pressing has been adopted. .

However, since the multi-stage press is a device having a large number of stages, usually about 5 to about 50, the manual method requires a considerably long time from the start to the end of the arrangement of the articles to be treated. There was a problem that the speed of work was poor. In the case of veneer sheets, especially thin products,
Since it is easily affected by heat, if it is not possible to move quickly to the stage of hot pressing, the veneer sheet will be deformed and deteriorated, leading to product defects. Therefore, there has been a particular need for improvement in the processing of such products.

In addition, it is difficult to manually place a plurality of products to be processed on each heating plate of each stage at a predetermined position on the heating plate, so that the pressing pressure applied to the heating plate is reduced. There is a problem that the product becomes non-uniform and defective products with insufficient pressure or excessive pressure are easily finished.

In particular, in the multi-stage press, the distance between the heating plate of one stage and the heating plate of the next stage is usually about 5 cm,
Since the structure is such that human hands and arms cannot be inserted into the space between the heating plates with sufficient margin, it was very difficult to ensure the accuracy of the arrangement of the processed products.

Furthermore, actually inserting the human hand and arm into the space between the heating plates of each stage of the press machine is a dangerous work that may cause a crushing accident of the hand, fingers, etc. There was also a problem in terms of safety. In addition, the multi-stage press machine
In order to finish the surface of the obtained product smooth, the lower surface of each hot platen where the surface of the object to be treated directly contacts is usually finished to be a mirror surface (coal surface). However, a conventional multi-stage press machine, for example, a multi-stage press machine as described in Japanese Patent Laid-Open No. 51-89267 discloses a belt conveyor for loading and unloading an article to be processed. Provided for each step, the endless belt of the conveyor is provided from the loading side to the unloading side of the press machine,
The belt center part on the upper side of the endless belt is located on the heating plate of the stage, while the belt center part on the lower side thereof is located under the heating plate of the stage. That is, above the central portion of the belt on the upper side, the central portion of the belt on the lower side of the endless belt provided on the upper stage of the relevant stage is located on the lower side of the heating plate on the upper stage. It was configured as. Therefore, when the article to be treated is placed on the belt center portion on the upper side of the endless belt and pressed, the surface of the obtained pressed product is sufficiently high due to the interposition of the belt portion on the lower side in the upper step. It was difficult to finish it into a smooth one, and sometimes the ground pattern in the central portion of the belt was shown, and in some cases, it was considerably damaged. The finish of the non-smooth surface and the appearance of the belt pattern significantly reduce the commercial value, especially in plywood and veneer sheets.

The present invention has been made in consideration of the above circumstances, and its purpose is to make the pressing pressure load even on a plurality of plywood sheets, veneer sheets, etc. for each heating plate of each stage. It can be arranged like this, and it can be arranged quickly without manual work, and it can be done safely, and with it, the surface is finished without the appearance of the belt ground pattern, which is finished on a smooth surface. (EN) Provided is a multi-stage press machine capable of obtaining a pressed product having a good finish.

[0011]

Means for Solving the Problems The present invention is to achieve the above-mentioned object, and for each stage of a multi-stage press, a belt conveyor is provided independently or together.
It is equipped to operate using a sensor or the like, and the belt conveyor has a pair of pulleys arranged outside the input side and the outside of the press side of the press, and an endless belt faces the pair of pulleys. The two belt central parts are wound so as to pass over the hot platen of the same stage of the press machine, and are conveyors that convey the object to be processed placed on the upper central part of the belt. The present invention relates to a characteristic multi-stage press machine.

That is, the multi-stage press according to the present invention is equipped with a desired number of belt conveyors at each stage, and the belt conveyor has one pulley on the outside of the side on which the article to be processed is carried. In addition, the other pulley is provided on the outside of the side where the article to be processed is carried out, and the endless belts are placed on the pair of pulleys so that the two central portions of the belts face each other on the hot plate of the same stage of the press machine. It is constructed so that it winds through. The article to be processed is placed on the upper one of the two facing belt central portions that pass on the hot platen of the same level, and is pressed in that state, and then conveyed. There are two belt central parts facing each other between the article to be treated and the heating plate of the stage, but between the article to be treated and the lower surface of the heating plate of the stage one step higher than the stage. Does not intervene. Therefore, at the time of pressing, the surface of the object to be processed can directly come into contact with the lower surface of the hot platen having a mirror finish, and the surface is finished smoothly.

Conventionally, a belt conveyor is provided in a space between a hot platen on a stage of a press machine and an adjacent hot platen, and each time the press is performed, the belt is also hot-pressed at the same time to perform hot-pressing. The method of doing was generally unexpected, even for those skilled in the art. Further, conventionally, a multi-stage press machine has also been known in which only a small number of belt conveyors are provided for each stage, and the endless belts pass from the loading side to the unloading side of the pressing machine. However, this device
Provided on the upper stage between the object to be processed located on the heating plate of the stage (via the belt central part on the upper side of the endless belt) and the heating plate of the stage higher than the stage. Since the central portion of the belt under the endless belt is interposed, the surface of the obtained pressed product may not be finished to a satisfactory smooth surface, and the background pattern of the central portion of the belt may be copied. However, it has the drawback that it can be seriously damaged in severe cases. These drawbacks have significantly reduced the commercial value of the products to be processed, especially when they are plywood and veneer sheets. The present invention eliminates such drawbacks by adopting the above-mentioned configuration.

The inventor of the present invention has wrapped the endless belt of the belt conveyor so that the central portions of the two belts facing the pair of pulleys pass together on the hot platen of the same stage of the press machine, and as the belt, By adopting a special belt with high heat resistance, as described in, it is placed between the hot plates of each stage of the press machine and heat-pressed together with the product to be processed such as a single plate sheet. We have found that a product that can be satisfactorily endured even if it is repeatedly used, and that a smooth surface is finished, and that the belt background pattern is not visible, and that the surface finish is good, can be obtained, and that the book Completed the idea.

In the present invention, the belt conveyors provided between the heating plates of the respective stages may be independently operated by individual motors or the like, or may be operated together by a mechanism for interlocking the conveyors. May be allowed.

The belt of the belt conveyor is usually about 100 to
Since it is used under heating and pressing conditions of about 150 ° C × about 5 to about 15 kg / cm ² × about 1 to about 10 minutes, it must be a material that is extremely tough and has high heat resistance. is there. From this point of view, the belt is a cloth made of glass fiber, carbon fiber or aromatic polyamide fiber (particularly aramid fiber), especially short fiber, or a surface coating of such cloth with heat resistant rubber, silicone resin or fluororesin. Those consisting of damp or impregnated fabrics are suitable.

Further, the belt of the belt conveyor is required to be such that it does not adhere to the surface of the heating plate even after repeated heating and pressing. Therefore, it is more preferable that the belt has a release agent applied on its surface to prevent thermal adhesion. Examples of the release agent that can be used in the present invention include silicone resin and fluororesin.

On the other hand, the other elements of the belt conveyor, particularly the pair of pulleys and the motor, are not directly placed under the above-mentioned heating and pressurizing condition, and thus may have the conventional general constitution.

Further, in the present invention, the structure of the multi-stage press machine is not particularly problematic, and any multi-stage press machine having a conventionally known or used structure can be applied to the present invention.

Further, in the present invention, in a more preferred embodiment of the multi-stage press machine, the belt conveyor is further provided with a control means for enabling the belt to be fed by a constant length, so that the article to be processed can be fed into the press machine. It is designed so that it can be accurately conveyed by a fixed distance to a position to be clamped.

The control means is arbitrary as long as it can achieve this purpose. For example, an optical mark (reflection mark) provided at a predetermined interval on the belt, an optical sensor sensitive to this, and a sensor. An example is a combination of control devices that control the operation of the belt conveyor based on the information read in.

Further, in the present invention, in a more preferred embodiment of the multi-stage pressing machine, the belt conveyor further comprises a tension adjusting means for suppressing the meandering of the belt,
This is to ensure stable belt running at all times.

As the tension adjusting means, for example, in one pulley of the belt conveyor, two air cylinders or springs are arranged so as to press the left and right ends of the pulley independently of each other. An example is one in which the right side part can be tensioned.

Furthermore, in the multistage press machine of a more preferred embodiment of the present invention, a loader consisting of another belt conveyor is installed on the loading side of the press machine, and if necessary, an unloader consisting of another belt conveyor is installed in the press machine. Is provided on the carry-out side so that the article to be processed can be transferred to and from the belt conveyor between the heating plates. Preferably, the loader and the unloader used are multi-stage belt conveyors having the same number of stages as the number of belt conveyors between the heating plates. By providing the loader and the unloader together, it is possible to carry in and carry out the article to be treated at each stage at the same time. Therefore, it is possible to arrange the article to be treated on the hot platen at all stages.

[0025]

In the present invention, by operating the belt conveyor between the heating plates, the object to be processed can be moved from the outside of the press to a predetermined position between the heating plates without the need to insert hands or fingers between the heating plates. Can be brought in quickly. Therefore, the arrangement of the objects to be processed before heating and pressing becomes very quick and easy, and the arrangement work becomes safe.

If the above-mentioned control means is provided, the accuracy of the arrangement of the articles to be treated is improved, and if the above-mentioned tension adjusting means is provided, the stability of the operation of the belt conveyor is improved, and the above-mentioned loader is also provided. If the unloader and the unloader are provided, the loading, arranging, and unloading of the products to be processed can be performed in a series of steps, and the workability of the entire hot press working can be dramatically improved.

Further, if the belt conveyor is provided with the belt made of the above-mentioned material, the durability against the heating and pressing process is improved, and the hot press can be continuously processed for a long time without any problem.

[0028]

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, in addition to the basic structure of the conventionally used multi-stage press machine, the multi-stage press machine 10 of the embodiment has a desired number of belt conveyors 1 ... In each stage. The belt conveyor 1 is equipped with one pulley 2 outside the side where the article to be processed is loaded, and the other pulley 3 outside the side where the article to be processed is carried out. 4 is wound around these pulley pairs 2 and 3, and is passed through the space between the heating plate 11 and the adjacent heating plate 11.

The belt conveyors 1 provided between the heating plates 11 of each stage can be independently operated by individual motors 5.

The belt 4 of the belt conveyor 1 is made of a short fiber made of glass fiber, carbon fiber or aromatic polyamide fiber (particularly aramid fiber), or is coated with heat resistant rubber, silicone resin or fluororesin on its surface. It is also made of impregnated fabric and is tough and heat resistant.

Further, the belt 4 is coated with a release agent such as a silicone resin or a fluororesin on its surface so that heat adhesion is unlikely to occur. The pair of pulleys 2 and 3 and the motor 5 have a conventional general configuration.

The belt conveyor 1 of the embodiment is further provided with control means near the pulley 2 which enables the belt to be fed by a constant length. The means controls the operation of the belt conveyor 1 on the basis of reflection marks (not shown) on the belt 4 provided at predetermined intervals, an optical sensor 6 sensitive to this, and information read by the sensor 6. And a control device (not shown). Therefore, the processed product A
Can be accurately conveyed from the carry-in side of the press machine 10 to a position to be clamped by a fixed distance.

Further, the belt conveyor 1 of the present embodiment is further provided with a tension adjusting means for suppressing the meandering of the belt in the one pulley 3. In this means, two air cylinders are arranged so as to press the left and right ends of the pulley 3 independently, so that the left side and the right side of the belt 4 can be respectively tensioned. Therefore, stable belt running can be always ensured.

Further, in the multi-stage press machine of this embodiment, the loader 8 composed of another belt conveyor is carried to the loading side of the press machine 10, and the unloader 9 composed of another belt conveyor is carried out of the press machine 10. On the side, the article A to be processed can be transferred to and from the belt conveyor 1 between the heating plates. Therefore, the articles A to be processed can be loaded and unloaded simultaneously in each stage, and the articles A to be processed can be arranged on the hot platen in all stages.

Then, the operation of each belt conveyor 1 between the heating plates 11 ... Is started, and the product A is transferred from the loading side of the press 10 to the space between the heating plates 11 and 11. By sequentially inserting it, it can be quickly carried to a predetermined position between the heating plates 11 ...

Therefore, the shape and size of the object A to be processed are shown in FIG.
The arrangement can be performed very quickly and easily even when the size is large or small as shown in FIG. Moreover, the work is safe without the need to insert hands or fingers between the heating plates 11 and 11. Especially, since the control means such as the sensor 6 is provided,
The product A to be processed could be accurately arranged at a predetermined position between the heating plates.

After the heating and pressing treatment is completed, the treated product A is
Are carried out from the carry-out side of the press machine 10.

In this embodiment, the loader 8 and the unloader 9 are also operated together, so that the workpiece A can be mechanically moved on the conveyor of the loader 8 from the hot plate 11 of the press 1 without any manual work. 1 between the heating plate 11 and the heating plate
The product A is carried upward, and the product A is carried out from the conveyor 1 between the heating plates 11 ... to the conveyor of the unloader 9, so that the process A can be carried in, arranged and carried out completely. I was able to proceed automatically.

Further, since the belt 4 of the belt conveyor 1 has a high durability, the hot press can be continuously processed for a long time without any problem.

The pressing machine of the embodiment shown in FIG. 1 is provided with guide rollers 12 near the end of the heating plate 11 on each of the carry-in side and the carry-out side. And smoothing out, but roller 1
Instead of 2, a guide plate having a structure extending outward from the end of the hot platen may be provided.

For example, like the press machine of the modification shown in FIG. 2, the guide plates 13 having the above structure may be provided on each of the carry-in side and the carry-out side, and the press machine of the modification shown in FIG. As described above, the guide roller 12 may be provided on the carry-in side, and the guide plate 13 having the above structure may be provided on the carry-out side.

[0043]

[Effect of the Invention] As can be seen from the above description, the present invention has the following effects.

It is possible to arrange a plurality of products to be processed in each hot platen of each stage so that the load of the press pressure is equalized, and therefore, defective products with insufficient pressurization or excessive pressurization are significantly generated. Decrease to.

The objects to be processed can be easily arranged in a very short time from the start to the end without manual work. Even when the object to be processed is thin plywood, veneer sheet, etc., it is possible to move quickly to the stage of thermal compression under the influence of heat, deformation of the veneer sheet, alteration, etc.
The occurrence of product defects is reduced.

The work for arranging the products to be processed can be safely proceeded without fear of crushing accidents such as hands and fingers, and the work safety is improved. From the above, a multi-stage press machine that is very suitable for processing in which a plurality of products to be processed (plywood, veneer sheets, etc.) are arranged side by side at a predetermined position on a single-stage hot platen and then heat-pressed together Will be provided.

Further, there is no belt between the object to be treated on the hot platen of the stage and the hot platen one stage higher than the hot platen, and the surface of the item to be treated is on the upper side at the time of pressing. Since it comes into direct contact with the mirror-finished lower surface of the stepped hot platen, it is possible to obtain a pressed product that is finished on a smooth surface and does not show the background pattern of the belt, and the surface finish is good, especially plywood and veneer sheets. For products whose design value is mainly due to their surface, etc., it is possible to prevent a decrease in product value.

Further, by providing the control means,
The object to be processed can be more accurately arranged at a predetermined position on the hot platen, and the accuracy of the arrangement is improved.

Further, by providing the tension adjusting means, the operation stability of the belt conveyor is improved and continuous processing is facilitated.

Further, by providing the loader and the unloader, the loading, arranging and unloading of the article to be processed can be carried out in a series of steps, and the work efficiency of the hot press working is dramatically improved.

Further, by adopting a belt material which is tough and has high heat resistance, the durability of the belt is improved, and continuous hot press working can be performed without any problems.

[Brief description of drawings]

FIG. 1 is a schematic view showing a multi-stage press machine according to an embodiment of the present invention.

FIG. 2 is a schematic view showing a modified multi-stage press machine.

FIG. 3 is a schematic diagram showing another modified multi-stage press machine.

[Explanation of symbols]

 1 Belt Conveyor 2 Pulley 3 Pulley 4 Belt 5 Motor 6 Optical Sensor 7 Tension Adjusting Means 8 Loader 9 Unloader 10 Multi-stage Press Machine 11 Hot Plate 12 Guide Roller 13 Guide Plate A Workpiece

Claims (6)

[Scope of utility model registration request] 1. A belt conveyor is provided for each stage of a multi-stage press machine so as to operate independently or together, and the belt conveyor carries out a pair of pulleys to and from an outside of an input side of the press machine. The two belt central portions, which are arranged outside the side and face the endless belt facing the pair of pulleys, are wound so as to pass on the heating plate of the same stage of the press, and the upper belt central portion is wound. A multi-stage press machine, which is a conveyer that conveys an object to be processed placed on the table. 2. An endless belt of a belt conveyor, which is a fabric made of glass fiber, carbon fiber or aromatic polyamide fiber (particularly aramid fiber), especially short fiber,
2. The multi-stage pressing machine according to claim 1, wherein the cloth is made of a cloth whose surface is covered or impregnated with heat resistant rubber, silicone resin or fluororesin. 3. The multi-stage press according to claim 2, wherein the endless belt of the belt conveyor has a surface coated with a release agent. 4. The belt according to claim 1, wherein a loader composed of another belt conveyor is provided on the loading side of the multi-stage press, and an unloader composed of a further belt conveyor is installed on the unloading side of the multi-stage press, if necessary. The multi-stage press machine according to any one of claims 1 to 3, wherein the multi-stage press machine is provided so that an article to be processed can be transferred to and from a conveyor. 5. The belt conveyor according to claim 1, further comprising a control means capable of feeding a belt of a constant length. The multi-stage press machine described in the item. 6. The belt conveyor according to claim 1, further comprising tension adjusting means for suppressing meandering of the endless belt. Multi-stage press machine.