JPH08273809A - Heating material and manufacture thereof - Google Patents

Abstract

PURPOSE: To improve stability and heat transmitting property of a plain heat generating body by inserting a plain heater body in a regenerated parison by blowing a material for hollow molding and fixing the body in a projected part formed in the inside. CONSTITUTION: A parison obtained by blowing a material for hollow molding is softened by heating. After a plain heater body 3 is inserted into the parison, the resulting body is inserted between an upper die 1 and a lower die in which a plurality of projected parts 2a are formed and molded by blowing in order to thrust projected parts 12a, which are so formed as to be conformed with the projected parts 2a of the lower die 2 in the number and the shape, into one face part 12 of a panel of the parison. Then, the plain heat radiating body 3 is pressed by the projected parts 12a of the one face side 12 of the panel and fixed by being sandwiched between one face side 12 of the panel and the inner wall face of the other face side of the panel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating material effective for heating, preventing snow melting, dew condensation and the like, and a method for manufacturing the same.

[0002]

2. Description of the Related Art In recent years, when manufacturing heating floor walls, indoor / outdoor heating chairs, toilet seats, etc., a sheet is lined with a heater on a material such as resin or metal, or with a sheet heating element on the material. Shaped or panel-shaped ones are used. Further, when a material is blow-molded and a sheet-like heating element is incorporated therein to form a heating sheet or a heating panel, a part of the blow-molded material is cut out and the sheet-like heating element is inserted inside the hollow. . The sheet heating element
A pair of electrodes is attached to at least one surface of a heating element formed of a conductive material powder layer formed using a polymer material binder, and further packaged with an aluminum soaking plate and a protective sheet, if necessary, It is an organic heating element that generates heat when electricity is applied between the electrodes.
Molding in m units is possible. In the correlation characteristics of power consumption (W), heat generation temperature (° C), and time (minute), the temperature suddenly rises due to initial energization to generate heat, and the preset unique heat generation temperature is reached in a very short time. Then, thereafter, the heat generation temperature can be kept constant by applying a minimum low current. That is, it is a material that has a self-temperature adjusting function (PTC characteristic) for maintaining the upper and lower limits of the set heat generation temperature, and can be used as a heat sensor as well as a heat generator.

[0003]

By the way, in the case of a sheet or panel in which a material such as a heater or a sheet heating element is lined with a heat source, there is a problem in the heat retaining effect with the outside air. In addition, a blow-molded material made by incorporating these heat sources into the hollow interior is structurally strong and can be expected to have a heat-retaining effect due to the internal air layer. It is impossible. Further, when the sheet heating element is inserted inside the blow-molded product, not only the manufacturing becomes complicated due to the increase in the number of steps, but it is difficult to fix the sheet heating element in the hollow inside by adhesion, There is a problem in that it is troublesome to assemble the heating floor wall, the heating chair, and the like into a specific shape using such a sheet or panel. The present invention eliminates the problems of the heating sheet and the heating panel when the sheet heating element is inserted into the blow molded product that has been conventionally performed, and it is of course that the heat retention property which is the original function is good. It is an object of the present invention to provide a heating material that can simplify the manufacturing process and a manufacturing method thereof.

[0004]

In the heating material of the present invention, a hollow molded material is provided with a convex portion projecting inward, and a planar heating element arranged inside the hollow is sandwiched by the convex portion on an inner wall surface. It is fixed, or the hollow molded material is provided with opposed convex portions projecting inward, and the planar heating element arranged inside the hollow is sandwiched and fixed between the opposed convex portions, The hollow interior may be filled with a heat insulating foam or a heat storage material. Such heating material blows the material for hollow molding,
After inserting the planar heating element inside the formed parison, press it with an upper die and a lower die that have a convex portion on at least one of the molds, and press the planar heating element between the convex portion and the inner wall surface or opposite convex portions. It is manufactured by sandwiching and fixing between parts.

[0005]

[Function] When the sheet heating element is inserted into the hollow interior formed by blow molding of the material, the convex portion projecting inside is pressed against the sheet heating element so that the sheet heating element faces the inner surface of the panel or faces each other. Since it firmly presses against the convex portion, the heat transfer property can be further enhanced, and the stability of the planar heating element is increased, so that the assembling workability is enhanced.

[0006]

Embodiments of a heating material and a manufacturing method thereof according to the present invention will be described below with reference to the drawings. In addition,
The heating material is generally manufactured as a panel having a total thickness of about 10 to 30 mm, preferably about 15 to 25 mm. FIG.
Is a heating panel for floors, chairs, etc. as an example of heating material 1
It is sectional drawing which shows the form which mold-molds 0. When ABS resin, for example, is used as the material of the heating panel 10, the softened parison is blow-molded with a mold including an upper mold 1 and a lower mold 2. At this time, the sheet heating element 3 is inserted into the parison and the mold is closed. On one side of the mold, for example, the lower mold 2 is provided with projections 2a at a plurality of locations, and during molding, the panel surface 12 of the material parison is matched to the shape and number of the projections 2a of the lower mold 2. Ribs (projections)
12a is formed. This rib 12a is the hollow part 1 of the panel.
1 is formed so as to protrude so as to be close to the panel other surface portion 13.

The planar heating element 3 inserted into the hollow panel portion 11 is pressed by the ribs 12a of the panel surface 12 during molding, and the space between the ribs 12a and the inner wall surface of the panel surface 13 is reduced. It is sandwiched in the position, and it is pressed into contact with it and is clamped and fixed in that position. That is, it is not necessary to particularly position the hollow panel portion 11 during blow molding,
The sheet heating element 3 is firmly supported between the panel one surface portion 12 and the panel other surface portion 13.

The heating panel 10 molded in this way
Since the planar heating element 3 is connected to the external power cord 4 and the planar heating element 3 is in contact with the inner wall surface of the panel other surface portion 13, heat is generated when the panel other surface portion 13 is directly seated by a human body. Can be used as a heat transfer side sheet for keeping heat and heating. On the other hand, the panel surface 12 has ribs 12a.
The sheet is separated from the planar heating element 3 with the air layer of the panel hollow portion 11 interposed by the amount of protrusion, so that the heat insulating side sheet can be formed in the sense that heat is not released to the outside. As a specific example of such an embodiment, a panel for floors in which a sheet heating element enclosed in an aluminum foil is inserted into an ABS material panel, sandwiched and fixed, and the hollow interior is filled with expanded polystyrene. And the like.

In order to further enhance the function of the panel front surface portion 12 as a heat insulating side sheet, as shown in FIG. 2, the panel front surface portion 12 is lined with another heat insulating material 15 from the outside to be superposed. You can also Further, for the same purpose of enhancing the heat insulating effect, the heat insulating foam material 16 or the heat storage material can be filled rather than simply leaving the panel hollow portion 11 as an air layer. As a specific example, there is a heat storage type floor heating in which a heat storage material is filled and a glass wool heat insulating material is lined.

On the other hand, FIG. 3 shows a second embodiment of the present invention. In the case of the heating panel 20 of the second embodiment, the panel other surface portion 23, which replaces the flat panel other surface portion 13 as in the first embodiment, is formed in the same shape as the panel one surface portion 12 having the rib 12a. It has a different structure. That is, in this case, the upper mold 1 is also provided with a plurality of protrusions 1a facing the protrusions 2a of the lower mold 2, and the protrusions 1a form a plurality of ribs 23a on the other surface 23 of the panel. Therefore, the sheet heating element 3 is firmly sandwiched and pressed between the ribs 22a, 23a of the panel one surface portion 22 and the panel other surface portion 23, and is pressed and fixed in that position. Also in the heating panel 20 of the second embodiment, the first
Similar to the embodiment, the panel hollow portion 21 can be filled with the heat insulating foam material 16 or the heat storage material. As a specific example of such an example, an example of an outdoor stadium chair in which a planar heating element is sandwiched and fixed between convex portions of a high-density polyethylene material and the hollow interior is filled with polyurethane foam Is mentioned. Since such a chair used outdoors is constantly exposed to the air, heat is always taken from the heating surface, and normally the PTC function does not work, but with the above configuration, PTC at 55 ° C The function worked and the temperature of the chair surface could be maintained at 28 ° C.

The heating panels 10 and 20 of the first and second embodiments.
In the case of filling the panel hollow portion 11 or 21 with the heat insulating foam material 16 made of polystyrene, polyurethane or the like, in addition to the original function, the heat insulating foam material 16 enhances the pressing of the planar heating element 3 to the inner surface of the panel. , The heat transfer effect will be enhanced. When a heat storage material such as polyethylene glycol, sodium acetate.3H ₂ O, or sodium sulfate is filled in place of the heat insulating foam material 16, nighttime electric power or solar energy can be used, and the heat storage type can be economically advantageous. There are advantages.

Further, the heating panel 1 of each of the first and second embodiments.
In Nos. 0 and 20, comparing the area or region where the panel one surface portion 12 (or 22) and the panel other surface portion 13 (or 23) contact the planar heating element 3, the panel other surface portion 13 of the first embodiment is While the entire surface of the wall surface is in contact with the planar heating element 3, the ribs 22 facing each other in the second embodiment.
The sheet heating element 3 is in contact with only a and 23a. That is, the heating panel 10 of the first embodiment has a larger contact with the planar heating element 3 inside the heating panel 20 of the second embodiment. Therefore, the planar heating element 3 is used as an application in which it is desired to suppress heat transfer to the surface heated through the planar heating element 3, for example, as a snow melting panel in which a large amount of heat radiation is wasted. Heating panel 2 of the second embodiment with less contact with the
0 is preferred.

4 and 5 show the shapes of the ribs 22a, 23a of the panel one surface portion 22 and the panel other surface portion 23, respectively, taking the heating panel 20 of the second embodiment as an example. The ribs 22a and 23a shown in FIG. 4 are round ribs having a circular cross section, and the ribs 22a and 23a shown in FIG.
A is a long groove rib. However, these round ribs or long groove ribs can also be applied to the shape of the rib 12a provided in the heating panel 10 of the first embodiment.

[0014]

The heating material and the manufacturing method thereof according to the present invention are
A planar heating element is inserted into the hollow inside of a molded product panel made by blow molding the material, and ribs (projections) that are protrudingly molded inside the panel support the planar heating element by pressing it in contact with it. In addition, it is possible to eliminate inconveniences such as instability of fixing the sheet heating element inside the molded product, and to obtain a heating material with excellent assembly processability as a heating panel as well as the original function of heat retention and heat insulation. To be

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a molding aspect of a heating panel as a first embodiment of a heating material according to the present invention.

FIG. 2 is a cross-sectional view showing a modified example of the heating panel of the first embodiment.

FIG. 3 is a cross-sectional view showing a molding mode of a heating panel according to a second embodiment.

FIG. 4 is a perspective view showing the form of ribs in the heating panel of the second embodiment.

FIG. 5 is a perspective view showing another form of ribs in the heating panel of the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper mold 1a Mold protrusion 2 Lower mold 2a Mold protrusion 3 Sheet heating element 4 External power cord 10 (20) Heating panel 11 (21) Panel hollow part 12 (22) Panel one surface part 12a (22a, 23a ) Ribs (projections) 13 (23) Panel other surface 15 Heat insulating material 16 Heat insulating foam material

[Procedure amendment]

[Submission date] November 30, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

[0014]

EFFECTS OF THE INVENTION The heating material according to the present invention is obtained by inserting a planar heating element into the hollow inside of a molded product panel formed by blow molding a raw material, and ribs (projections) protrudingly formed therein.
Since the sheet heating element presses and supports the sheet heating element, inconveniences such as instability of fixing the sheet heating element inside the molded product as in the past can be solved, and the original function of heat insulation and heat insulation As a result, a heating material having excellent assembling workability such as a heating panel can be obtained.

Claims (4)

[Claims] 1. A hollow molded material is provided with a convex portion projecting inward, and a planar heating element disposed inside the hollow is sandwiched and fixed to the other inner wall surface by the convex portion. Heating material. 2. A hollow-molded material is provided with opposed convex portions projecting inward, and a planar heating element disposed inside the hollow is sandwiched and fixed between the opposed convex portions. Characteristic heating material. 3. The heating material according to claim 1 or 2, wherein the hollow interior is filled with a heat insulating foam or a heat storage material. 4. A planar heat generating material is formed by blowing a hollow molding material, inserting a planar heating element inside the formed parison, and pressing it with an upper die and a lower die having convex portions on at least one die. A method for manufacturing a heating material, comprising fixing a body between a convex portion and an inner wall surface or between convex portions facing each other.