JP3574083B2 - Paper machine - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a papermaking apparatus, and more particularly, to a papermaking apparatus provided with a step of drying a paper raw material during its transportation.
[0002]
[Prior art]
For this type of papermaking apparatus, a technique disclosed in, for example, JP-A-5-239786 is known. In this technique, a slurry in a predetermined box is injected onto a conveyor (wire) to obtain a wet paper material (web). The paper raw material conveyed on the conveyor is subjected to vacuum discharge of the solution, pressurization and squeezing, thereby completing the paper product.
[0003]
[Problems to be solved by the invention]
In order to dry a paper raw material (web) into a paper product by the means as described above, it is necessary to repeat the above-described pressurization and squeezing a plurality of times, for example. The transport distance becomes longer, which causes an increase in the size of the apparatus.
The present invention is intended to solve the above-described problem, and an object of the present invention is to make it possible to dry a paper raw material sent to a conveyor in a short time to finish it into a paper product, thereby relatively shortening a conveying distance of the conveyor. It is to be able to set short.
[0004]
[Means for Solving the Problems]
The present invention has been achieved to achieve the above object, and the invention according to claim 1 is a papermaking apparatus in which a wet paper material is dried while being fed to a conveyor and conveyed, wherein the conveyor is It is made of a net-like heat-resistant metal, and on the conveyance surface of the conveyor, a pressure roller made of a heat-resistant metal for pressurizing the paper material conveyed by the conveyor is provided, and an upper portion of the conveyance surface of the conveyor. A heat source cover is disposed in the heat source cover, and a heating source capable of heating the paper raw material conveyed by the conveyor, the conveying surface of the conveyor and the pressure roller is disposed inside the heat source cover .
[0005]
According to the present invention, the paper material conveyed on the conveyor is heated by the heating source in the heat source cover, and at the same time, the conveyor heated by the heating source and the pressing roller that presses the paper material while rolling. Is also heated. Therefore, the paper raw material can be efficiently dried in a short time, and the conveying distance of the conveyor can be set relatively short.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described.
FIG. 1 is a configuration diagram showing an outline of a paper making apparatus. The first conveyor 10 shown in this drawing has a well-known structure for receiving a slurry ejected from a slice (not shown) and forming a paper raw material 12 (web). That is, the first conveyer 10 has a net shape, and a dehydration box (not shown) that receives a suction action by a suction pump (not shown) or the like is arranged below the transport surface.
[0008]
Then, the paper raw material 12 conveyed by the first conveyor 10 is dehydrated to some extent by the suction force in the dehydration box, and is sent from the end of the first conveyor 10 to the next second conveyor 14. Further, in the first conveyor 10, by adjusting the suction force in each portion in the width direction, the function of uniformly aligning the fiber arrangement direction of the paper raw material 12 is also achieved. The transport distance of the first conveyor 10 is about 1 m.
[0009]
The second conveyor 14 is configured to dry the paper raw material 12 and finish it into a paper product. The second conveyor 14 has a net shape made of a heat-resistant metal such as stainless steel, and the paper material 12 which has been dehydrated to some extent but is still wet is continuously fed from the first conveyor 10. The transport distance of the second conveyor 14 is set to about 4 m, and four heat source covers 16 are arranged above the transport surface 14a along the transport direction. These heat source covers 16 are supported at fixed positions by a frame (not shown) of the second conveyor 14 or the like.
[0010]
FIG. 2 is an enlarged sectional view showing one of the heat source covers 16 together with a part of the second conveyor 14. As is apparent from this drawing, two electric heaters 18 used as heating sources are provided on the inner upper surface of the heat source cover 16. The output of one heater 18 is, for example, 1 kW, so that the output of one heat source cover 16 is 2 kW, and the total output is 8 kW.
[0011]
Two pressure rollers 20 are placed inside the heat source cover 16 and on the transport surface 14 a of the second conveyor 14 (on the paper raw material 12). These pressure rollers 20 are also made of a heat-resistant metal such as stainless steel, and both pressure rollers 20 are positioned directly below both heaters 18 during the movement of the second conveyor 14 by stoppers 22 fixed to a frame (not shown) or the like. It is held to roll. The weight of the pressure roller 20 is set to a value suitable for appropriately pressing the paper raw material 12 conveyed by the second conveyor 14 to adjust the thickness, and to a value that the second conveyor 14 can withstand. ing.
[0012]
A winding roller 24 for sequentially winding the paper products conveyed by the second conveyor 14 is disposed near the end of the second conveyor 14. The internal structure of the heat source cover 16 shown in FIG. 2 is the same for all four heat source covers 16 shown in FIG.
[0013]
The first conveyor 10 and the second conveyor 14 are both moving at the same speed (for example, 3.5 m / min), and the wet paper material 12 is continuously fed from the first conveyor 10 to the second conveyor 14. It is. The paper raw material 12 conveyed by the second conveyor 14 is heated by two heaters 18 at each of the heat source covers 16 and is appropriately compressed by the pressure roller 20. Moreover, since the second conveyor 14 is made of stainless steel or the like, the second conveyor 14 itself is heated by the heater 18 and is heated. Therefore, the paper raw material 12 is heated by the second conveyor 14 which is heated at the same time as being heated by the heater 18, so that the paper raw material 12 is dried in a short time and finished to a predetermined paper product.
[0014]
Further, since the pressure roller 20 that presses the paper raw material 12 at each heat source cover 16 is also made of metal such as stainless steel, it is heated by the heater 18. Since the pressure roller 20 heated in this way presses the paper raw material 12 while rolling on the upper surface thereof, the drying efficiency of the paper raw material 12 is further improved. In this way, the wet paper raw material 12 is finished into a paper product with a short transport distance, and the paper product is continuously wound by the winding roller 24.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing an outline of a paper making apparatus. FIG. 2 is an enlarged sectional view showing an internal structure of a heat source cover.
12 Paper raw material 14 Conveyor 14a Transfer surface 18 Heater (heating source)

Claims (1)

A papermaking apparatus in which a wet paper material is dried while being sent to and conveyed to a conveyor, wherein the conveyor is made of a net-like heat-resistant metal, and is conveyed by the conveyor on a conveying surface of the conveyor. A pressure roller made of a heat-resistant metal for pressurizing the paper material to be produced is provided, and a heat source cover is arranged above the conveying surface of the conveyor, and is conveyed by the conveyor inside the heat source cover. A papermaking apparatus in which a heating source capable of heating the paper raw material, the conveying surface of the conveyor, and the pressure roller is disposed.

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