JP5432965B2 - Sheet material heating device - Google Patents

Description

  The present invention relates to a sheet material heating apparatus that heats a sheet material prior to molding.

  There are parts in which a thin sheet material is molded into a shape having irregularities, such as automobile interior parts. Such a molded part is manufactured by heating a sheet material in which a thermoplastic resin is laminated on the back surface of the skin material, and cold-pressing with a molding die having a predetermined shape in a state where the thermoplastic resin layer is softened. ing.

  As a conventional apparatus that heats a sheet material prior to molding, an apparatus that heats the sheet material with air (hot air) heated by electricity, a gas burner, or the like is common (see, for example, Patent Document 1). However, since air has a small heat capacity, heating efficiency is poor. Further, in recent years when power saving is strongly demanded from the industry, an apparatus capable of heating the sheet material while reducing power consumption has been desired.

  Therefore, in view of the above circumstances, an object of the present invention is to provide a sheet material heating apparatus that can efficiently heat a sheet material while reducing power consumption.

  In order to solve the above-described problems, the sheet material heating device according to the present invention is described as follows: “A box-shaped container having a main space in which a sheet material is accommodated is formed by overlapping the peripheral edges of each other. One container half and a second container half, an introduction passage formed in the first container half for introducing water vapor into the main space, and the main space formed in the second container half A discharge path for discharging water vapor, and a pipe which is disposed in at least one of the first container half and the second container half and heats the main space with water vapor flowing inside. .

  In the sheet material heating apparatus having the above configuration, the sheet material accommodated in the main space is directly heated with water vapor. Since water vapor has a larger heat capacity than air, the sheet material can be heated with higher thermal efficiency than a conventional heating device that heats with warm air. In addition, the sheet material heating device according to the present invention may be a case where water vapor is reduced in temperature due to pressure drop or heat dissipation due to piping resistance while being delivered from the water vapor generating device to the sheet material heating device, and the dryness may be decreased. The main space in which the sheet material is accommodated is heated by water vapor flowing through the pipe. Thereby, the sheet material can be efficiently heated while suppressing the decrease in the temperature and the decrease in the dryness of the water vapor for heating the sheet material.

  The water vapor introduced into the apparatus as a direct heating medium may be saturated water vapor or superheated water vapor. Even if it is introduced as saturated steam, it is possible to obtain superheated steam having a temperature higher than the saturation temperature corresponding to the pressure in the apparatus by heating through the pipe. Superheated steam has a large sensible heat in addition to latent heat, and is therefore suitable as a direct heating medium. Moreover, since the water vapor | steam after giving a heat | fever to a sheet | seat material will not condense if the superheated state is maintained (unless it falls to a saturation temperature), a sheet | seat material can be heated in a dry state.

  In addition, in the present invention, water vapor is used as a medium for directly heating the sheet material, and water vapor is also used as a medium for heating the space that accommodates the sheet material, and the water vapor can be generated by combustion of fuel. it can. Thereby, power consumption can be reduced and a sheet material can be heated. Even if steam is generated by electric power, heating with water vapor is more efficient than electric heating, and water vapor has less energy loss due to delivery, so overall power consumption is reduced compared to electric heating. can do.

In addition to the above-described configuration, the sheet material heating device according to the present invention includes: "The first container half is partitioned from the main space by a first partition portion and communicates with the main space through the introduction path; the first hole portion steam from outside the device through the Ru with a first space to be introduced "is intended. In addition, “the pipe includes the first pipe disposed in the first partition portion”.

  In the sheet material heating device of this configuration, water vapor is introduced into the first space prior to introduction into the main space, where it is heated via the first pipe. Accordingly, the water vapor that has been heated in advance in the first space to increase the temperature and become dry is introduced into the main space. Thereby, the temperature fall and condensation of water vapor in the main space can be more effectively suppressed.

  In addition, since the first pipe is disposed in the first section that divides the first space from the main space, the first space and the main space can be heated at the same time with water vapor flowing through the first pipe. it can.

  In addition, by providing the first space upstream of the main space, the number of first passages that connect the first space and the main space is increased while the number of first holes for introducing water vapor from the outside of the apparatus is reduced. It is possible to set to This makes it possible to uniformly introduce water vapor into the main space through many introduction paths while simplifying the connection between the apparatus and piping for delivering water vapor from the outside of the apparatus to the apparatus.

  In addition to the above configuration, the sheet material heating device according to the present invention can be “equipped with a steam trap for discharging condensed water from the first space to the outside of the device”.

  With this configuration, even if water vapor is condensed in the first space, the condensed water is discharged through the steam trap. Thereby, it can introduce | transduce into main space, after raising the dryness of water vapor | steam, and can heat a sheet | seat material with higher thermal efficiency.

In addition to the above configuration, the sheet material heating device according to the present invention is "the first container half and the second container half are arranged up and down with the first container half up, the first container half has a protrusion protruding into said first space from said first compartment section, the introduction passage is opened to the upper end of the protrusion "Ru der ones.

  In the sheet material heating device of this configuration, water vapor is introduced into the main space through an introduction path that opens to a high position in the first space. If the introduction path is open at a low position in the first space, the condensed water may flow into the main space together with the water vapor when the water vapor condenses in the first space. On the other hand, in this structure, even if condensed water arises, only the water vapor | steam isolate | separated from condensed water can be introduce | transduced into the main space.

  In addition to the above-described configuration, the sheet material heating device according to the present invention is configured such that “the second container half is partitioned from the main space by a second partition portion and communicates with the main space through the discharge path, It includes a second space through which water vapor is discharged to the outside of the apparatus through the second hole, and includes a second pipe disposed in the second partition as the pipe.

  In the above configuration, since the second space is provided on the downstream side of the main space, the number of the second holes for discharging water vapor to the outside of the apparatus is reduced, and the discharge that communicates the main space and the second space. It is possible to set to increase the number of roads. As a result, it is possible to simplify the connection between the apparatus for delivering water vapor from the sheet material heating apparatus to the outside of the apparatus and the apparatus while smoothly discharging the water vapor from the main space via many discharge paths. .

  Moreover, the main space can be heated with water vapor flowing through the second pipe disposed in the second partition portion, and the second space can be simultaneously heated while increasing the efficiency of heating the sheet material with water vapor. As a result, it is easy to construct a circulation system that suppresses the condensation of used water vapor, collects it as water vapor, reheats it, and reuses it, thereby contributing to energy saving.

  As described above, as an effect of the present invention, it is possible to provide a sheet material heating apparatus that can reduce power consumption and efficiently heat a sheet material.

It is an exploded perspective view (figure seen from the upper part) of the sheet material heating device of one embodiment of the present invention. It is a disassembled perspective view (figure seen from the lower part) of the sheet | seat material heating apparatus of FIG. It is a left view of the sheet | seat material heating apparatus of FIG. It is the sectional view on the AC line of the sheet | seat material heating apparatus of FIG. It is the AB sectional view taken on the line of the sheet material heating apparatus of FIG.

  Hereinafter, a sheet material heating apparatus 1 (hereinafter simply referred to as “heating apparatus 1”) according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5.

  The heating device 1 includes a first container half 10 and a second container half 20 in which a box-shaped container including a main space 30 that accommodates a sheet material is formed by overlapping the peripheral edges of each other. , An introduction path 17 for introducing water vapor into the main space 30 formed in the first container half 10, a discharge path 27 for discharging water vapor from the main space 30 formed in the second container half 20, The pipe is disposed in at least one of the half container 10 and the half container 20 and heats the main space 30 with water vapor flowing inside.

  Further, in the heating device 1, the first container half 10 is partitioned from the main space 30 by the first partition 12, communicates with the main space 30 through the introduction path 17, and passes through the first hole 15. A first space 31 into which water vapor is introduced from the outside of the apparatus is provided. As a pipe, the first pipe 18 disposed in the first partition part 12 is provided, and the second container half 20 is provided with a second partition part 22. Is provided with a second space 32 that is partitioned from the main space 30 and communicates with the main space 30 through the discharge passage 27 and through which the water vapor is discharged to the outside of the apparatus through the second hole 25. A second pipe 28 is provided in the partition part 22.

  More specifically, the first container half 10 and the second container half 20 are arranged one above the other with the first container half 10 facing up. First, the configuration of the first container half 10 will be described. The first container half 10 includes a first rectangular partition 12 having a substantially rectangular shape and a first side wall 13 extending upward and downward along the outer periphery of the first partition 12. One main body 11 and a first cover plate 14 that closes the space surrounded by the first side wall 13 above the first partition 12 and forms the first space 31 therein are provided.

  From the upper surface of the 1st division part 12, many protrusion parts 16 of the height which does not reach the 1st coating | coated board 14 which protrude in a mountain shape in the 1st space 31 are provided. Each projecting portion 16 is formed with an introduction path 17 that penetrates in the vertical direction and opens on the lower surface of the first partition portion 12. Further, the first pipe 18 is arranged in a meandering manner so as to sew between the plurality of projecting portions 16 in a state of being partially embedded in the upper surface of the first partitioning portion 12. The upstream end 18u and the downstream end 18d of the first pipe 18 rise toward the first cover plate 14, respectively, and pass through the hole 41 and the hole 45 formed in the first cover plate 14. It is connected to an inflow pipe 41b and an outflow pipe 45b for water vapor flowing through one pipe 18, respectively.

  The first hole 15 is formed in the first cover plate 14 and is connected from the upper surface side of the first cover plate 14 to an introduction pipe 15b for directly introducing water vapor as a heating medium. In the present embodiment, two first holes 15 are provided, and water vapor is introduced into the first space 31 from the two introduction pipes 15b.

  Further, a steam trap pipe 19 is inserted through the center of the first cover plate 14 from above. The lower end of the pipe 19 is a “valley” portion between the protruding portion 16 and the protruding portion 16, and reaches the vicinity of the upper surface of the first partition portion 12. On the other hand, the upper end of the pipe 19 is connected to a steam trap (not shown). In addition, you may connect the upper end of the pipe 19 to a suction device via a steam trap.

  In addition, the fastening with the 1st main-body part 11 and the 1st coating | coated board 14 is carried out in the 1st coating | coated board 14 with the volt | bolt 75 penetrated to each of the some hole part 58 penetrated up and down along the 1st side wall part 13. This is done by inserting through a plurality of holes 71 drilled along the outer periphery and fastening them with nuts (not shown). Further, a plurality of fastening protrusions 51 protruding from the upper surface of the first partition part 12 and reaching the first cover plate 14 are formed at positions closer to the center in the first partition part 12. The bolt body 65 is inserted into the hole portion 55 penetrating the protrusion 51 and the hole portion 61 formed in the first cover plate 14 and fastened with a nut, whereby the first main body portion 11 and the first cover plate 14 are fastened. Is solid.

  Next, the configuration of the second container half 20 will be described. The second container half 20 has a substantially rectangular and flat second partition 22 and a second main body having a second side wall 23 extending downward along the outer periphery of the second partition 22. 21 and a second cover plate 24 that closes the space surrounded by the second side wall 23 below the second partition 22 and forms the second space 32 therein.

  On the upper surface side of the second partition part 22, a step part 26 that is one step lower is formed along the outer periphery. Here, the outer dimension of the second partition part 22 is equal to the outer dimension of the first partition part 12, and the width of the step part 26 is set to be equal to the thickness of the first side wall part 13 of the first container half 10. ing.

  The second pipe 28 is serpentinely arranged in a state of being partially embedded in the lower surface of the second partition portion 22. The upstream end portion 28u and the downstream end portion 28d of the second pipe 28 extend downward toward the second covering plate 24, respectively, and through the hole portion 42 and the hole portion 46 formed in the second covering plate 24. The water vapor inlet pipe 42b and the outlet pipe 46b are connected to the second pipe 28, respectively.

  In addition, in a portion where the second pipe 28 is not arranged, a number of discharge paths 27 penetrating up and down the second partition portion 22 are provided. Here, in this working gas, the position of the exhaust passage 27 is deliberately shifted so that the axial direction of the discharge passage 27 (the vertical direction in which the discharge passage 27 extends) does not coincide with the axial direction of the introduction passage 17 in the first container half 10. Yes.

  The second hole portion 25 is formed in the second cover plate 24 and is connected from the lower surface side of the second cover plate 24 to a discharge pipe 25b that directly discharges water vapor as a heating medium. In the present embodiment, two second holes 25 are provided, and water vapor is discharged from the second space 32 through the two discharge pipes 25b.

In addition, the fastening with the 2nd main-body part 21 and the 2nd coating | coated board 24 is carried out in the 2nd coating | coated board 24 with the volt | bolt 76 inserted in each of the some hole part 59 penetrated up and down along the 2nd side wall part 23. This is done by passing through a plurality of holes 72 drilled along the outer periphery and fastening with nuts (not shown). Further, a plurality of fastening protrusions 52 protruding from the lower surface of the second partition portion 22 and reaching the second cover plate 24 are formed at positions closer to the center in the second partition portion 22. A bolt 66 is inserted into a hole 56 penetrating the protrusion 52 and a hole 62 formed in the second cover plate 24 and fastened with a nut, whereby the second main body portion 21 and the second first cover plate are fastened. Is solid.

When the first container half body 10 and the second container half body 20 configured as described above are superposed one above the other, the lower end surface of the first side wall portion 13 of the first main body portion 11 is aligned with the upper surface of the step portion 26 of the second main body portion 21. Abut. Thereby, the space surrounded by the first side wall portion 13 below the first partition portion 12 is closed by the second partition portion 22, and the main space 30 is formed.

  Next, a heating method of the sheet material using the heating device 1 having the above configuration will be described. First, in a state where the first container half 10 is separated from the second container half 20, the sheet material is placed on the upper surface of the second partition 22. The sheet material is not limited to a sheet material in which a thermoplastic resin is laminated on the back surface of the skin material. For example, even a sheet material in which a mixed layer of a thermoplastic resin and a fiber material is laminated on the back surface of the skin material, a sheet material made only of a thermoplastic resin layer, and the like can be heated by the heating device 1. In the case where the sheet material has air permeability, water vapor can be passed through the sheet material and heated, which is preferable, but the sheet material can be heated by the heating device 1 regardless of whether the sheet material has air permeability. In addition, when the dimension of a sheet | seat material is small with respect to the area of the 2nd division part 22, it is good to partially cover the several discharge path 27 opened to the upper surface of the 2nd division part 22 with a cover board.

  When the setting of the sheet material is completed, the first container half 10 is overlaid on the second container half 20. As a result, the sheet material is accommodated in the main space 30. In this state, water vapor is introduced from the inflow pipes 41b and 42b, and the water vapor is circulated through the first pipe 18 and the second pipe 28, respectively, and flows out from the outflow pipes 45b and 46b. Thereby, the main space 30 is heated by the water vapor flowing through the first pipe 18 and the second pipe 28. At the same time, the first space 31 is heated by the water vapor flowing through the first pipe 18, and the second space 32 is heated by the water vapor flowing through the second pipe 28. In this state, water vapor is introduced into the first space 31 from the introduction pipe 15 b through the first hole portion 15.

  As the water vapor, for example, water vapor of 120 ° C. to 200 ° C. generated in a boiler by burning fuel can be used. Moreover, the water vapor | steam generated with the boiler can be once stored in a sub tank, and can also be introduce | transduced into the heating apparatus 1 via a sub tank.

  The water vapor may decrease in temperature due to piping resistance or heat dissipation until it is introduced into the first space 31, and the dryness may decrease, but the first space 31 is heated by the first pipe 18. For this reason, the temperature of the water vapor can be increased under the pressure in the first space 31 to obtain superheated water vapor with a large sensible heat. Even when water vapor is condensed in the first space 31, the condensed water is discharged to the outside of the apparatus through the steam trap to which the pipe 19 is connected, so that the dryness of the water vapor can be increased.

  Then, the water vapor whose temperature has been raised and whose dryness has been raised enters the introduction path 17 that opens at the upper end of the protruding portion 16 and flows into the main space 30. Thereby, the sheet | seat material accommodated in the main space 30 can be efficiently heated with dry steam with high temperature. At this time, since the main space 30 is heated by the water vapor flowing through the first pipe 18 and the second pipe 28, the temperature of the water vapor in the main space 30 is reduced and the possibility of condensation is reduced. In the present embodiment, a large number of introduction paths 17 are provided. Thereby, water vapor spreads over the entire main space 30 and the sheet material can be heated uniformly.

  Further, as described above, since the axial direction of the discharge passage 27 is set to be deviated so as not to be located on the same line as the axial direction of the introduction passage 17, the discharge passage 27 is introduced from the introduction passage 17 into the main space 30. The water vapor moves laterally in the main space 30. Thereby, the moving distance in the main space 30 of water vapor | steam increases, and the heat | fever of water vapor | steam can fully be utilized for the heating of a sheet | seat material.

  The water vapor that gives heat to the sheet material in the main space 30 is discharged from the main space 30 via the discharge path 27 and collected in the second space 32, and is discharged from the discharge pipe 25 b via the second hole 25. It is discharged outside. At that time, since the second space 32 is heated by the water vapor flowing through the second pipe 28, the temperature of the water vapor flowing into the second space 32 is suppressed from being lowered, and the water vapor is discharged from the discharge pipe 25b. It can be discharged. Thus, the sheet material can be heated by a circulation system in which the water vapor discharged from the discharge pipe 25b is reheated and then introduced again into the first space 31.

  The present invention has been described with reference to the preferred embodiments. However, the present invention is not limited to the above-described embodiments, and various improvements can be made without departing from the scope of the present invention as described below. And design changes are possible.

  For example, in the heating apparatus 1 having the above-described configuration, the total opening area of the first hole 15, the introduction path 17, the discharge path 27, and the second hole 25 (the sum of the cross-sectional areas of the open spaces) is set to the first hole. The portion 15, the introduction passage 17, the discharge passage 27, and the second hole portion 25 can be enlarged in this order. That is, in the flow of water vapor, the total opening area is increased from the upstream side toward the downstream side. Thereby, water vapor | steam tends to flow smoothly from upstream to downstream, and the retention of water vapor | steam in the heating apparatus 1 can be suppressed.

  Moreover, in the above, the case where the steam trap was provided in order to discharge | emit condensed water from the inside of the 1st space 31 was illustrated. In addition, a steam trap for removing condensed water from the water vapor flowing through the first pipe 18 and the second pipe 28 can be provided.

1 Heating device (sheet material heating device)
DESCRIPTION OF SYMBOLS 10 1st container half body 12 1st division part 15 1st hole part 16 Protrusion part 17 Introductory path 18 1st pipe (pipe)
20 Second container half 22 Second partition 25 Second hole 27 Discharge path 28 Second pipe (pipe)
30 Main space 31 First space 32 Second space

Japanese Patent Laid-Open No. 11-240033

Claims (4)

A first container half and a second container half, in which a box-shaped container having a main space for accommodating a sheet material is formed by overlapping the peripheral edges of each other,
An introduction path formed in the first container half for introducing water vapor into the main space;
Disposed in at least one of the first container half and the second container half formed in the second container half, the discharge path for discharging water vapor from the main space, and the steam flowing through the inside A pipe for heating the main space ,
The first container half and the second container half are arranged up and down with the first container half up,
The first container half is partitioned from the main space by a first partition portion, communicates with the main space through the introduction path, and steam is introduced from the outside of the apparatus through the first hole portion. And a projecting portion projecting from the first partition portion into the first space.
The sheet material heating apparatus , wherein the introduction path opens at an upper end of the protrusion . As before Symbol pipe, sheet heating apparatus according to claim 1, characterized by comprising a first pipe disposed in the first compartment portion. The sheet material heating apparatus according to claim 1 , further comprising a steam trap for discharging condensed water from the first space to the outside of the apparatus. The second container half is partitioned from the main space by a second partition portion, communicates with the main space through the discharge passage, and discharges water vapor to the outside of the apparatus through the second hole portion. With two spaces,
As the pipe, a second pipe disposed in the second partition part is provided.
The sheet material heating device according to any one of claims 1 to 3, wherein the sheet material heating device is provided.

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