JPH11324233A - Temperature adjustable hollow face structural body and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily manufacture a temperature adjustable hollow face structural body at a low cost by integrally forming a temperature adjusting fluid passing hole in the inside. SOLUTION: A mold 6 having a gas channel forming recess part 5 forming a gas channel is used along the formation position of a temperature adjusting fluid passing hole 1. Next, a molten synthetic resin is injected in the mold in a prescribed amount and at a prescribed pressure. Immediately after injection or after passage of a minute time, pressurized gas is press-fitted in the synthetic resin of the recess 5 at the prescribed pressure. Thereafter the prescribed time gas pressure is maintained, and after cooling, the pressurized gas of a molding inside is discharged. Thereby a passing hole 1 is integrally formed as a hollow part left in the invasion route of the pressurized gas. Thereby structure is simple, its manufacture is easy and it can be provided at a low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow planar structure which can be used, for example, as a building material and the like, and which can control the temperature, and a method for producing the same. More specifically, a hollow planar structure which is an integrated synthetic resin injection molded product capable of performing temperature control by passing a temperature control fluid (heat medium, refrigerant) through a temperature control fluid passage hole which is a hollow portion. And its manufacturing method.

[0002]

2. Description of the Related Art Recently, it has been studied to adjust the temperature of a roof tile to make a living environment comfortable, especially for a roof tile of a house. In other words, it has been proposed that a warm fluid is flown to the roof tiles in winter and a fluid having a lower temperature than the outside air in summer to reduce the burning of indoors due to snow melting in winter and solar radiation in summer.

For example, Japanese Patent Application Laid-Open No. 61-204458 discloses a roof tile having an assembled structure in which a space through which a heat transfer tube passes and a space which is heated or cooled by heat radiated from the heat transfer tube are provided. We propose a roof tile structure that can reduce the temperature rise of the roof due to snow melting in winter and solar radiation in summer by ventilating warm air in winter and cool air in summer in the heat transfer tube. ing.

Japanese Patent Application Laid-Open No. Hei 8-326232 proposes that a heat insulating member having a heat exchange passage through which a cooling medium passes is provided on the back side of an aluminum roof tile, thereby lowering the roof temperature in summer. ing.

Further, "Industrial Materials", Vol. 46, No. 4, No. 94
The page describes a synthetic resin snow-melting roof tile in which a planar heating element is integrated.

[0006]

However, the roof tile disclosed in Japanese Patent Application Laid-Open No. 61-204458 requires a combination of a plurality of components to constitute the roof tile, and the structure is complicated and the production is complicated. In addition, there is a problem that the weight tends to be heavy.

Further, the roof tile disclosed in Japanese Patent Application Laid-Open No. 8-326232 has a problem that a special heat insulating member must be bonded to the back surface of the aluminum roof tile, so that the structure is complicated and the production is troublesome.

Further, "Industrial Materials", Vol. 46, No. 4, No. 94
The snow-melting roof tile made of synthetic resin on the page must integrate a special sheet-like heating element, which also requires time and effort to manufacture and increases the manufacturing cost.

The present invention has been made in view of the above-mentioned conventional problems. For example, the present invention provides a temperature-adjustable hollow-surface-enhanced structure that can be used as a roof tile as described above, and has a simple structure, a low cost, and an easy structure. It is intended to be able to be manufactured.

[0010]

SUMMARY OF THE INVENTION The present invention is an integrated synthetic resin injection-molded product, and has a series of temperature control fluid passage holes through which a temperature control fluid injected from one end can be discharged from the other end. And a temperature-controllable hollow surface-shaped structure characterized by being integrally formed, and as a method of manufacturing the same, pressurized gas is injected into a resin injected into a mold to thereby form a hollow inside. An object of the present invention is to provide a method for producing a temperature-adjustable hollow planar structure, wherein a temperature adjusting fluid passage hole is integrally formed.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a plan view showing an example (roof tile) of a temperature-adjustable hollow planar structure according to the present invention, and FIG.
Is a longitudinal sectional view thereof.

The hollow planar structure according to the present invention is a one-piece synthetic resin injection-molded article having a temperature control fluid passage hole 1 integrally formed therein. The hollow planar structure according to the present invention is used, for example, in building materials such as roofing materials, flooring materials, and wall materials, and in OA equipment cabinets such as automobile bodies, computers, copiers, and facsimile machines.

In the roof tile according to the present embodiment, the gas channel 2 is formed as a rib-shaped thick portion that partially projects to the back side.
The temperature control fluid passage hole 1 is integrally formed inside the gas channel 2 inside. The gas channel 2 is formed in a zigzag meandering manner. A similar temperature control fluid passage hole 1 formed along the gas channel 2 is provided with a temperature adjusting fluid injection hole 1 injected from one end. A series of fluids can be discharged from the other end.

On the other hand, a surface layer 4 is laminated via an adhesive layer 3 on the surface side of the roof tile according to this embodiment. The surface layer 4 is for increasing the weather resistance of the synthetic resin constituting the main body, and for example, aluminum or acrylic resin can be used.

The temperature of the roof tile according to this embodiment can be adjusted by flowing a temperature adjusting fluid into the temperature adjusting fluid passage hole 1. When a plurality of roof tiles according to this example are laid by connecting the temperature control fluid passage holes 1 to each other, and the roof is configured, the temperature control fluid heated in winter is allowed to flow through the temperature control fluid passage holes 1. It is possible to melt snow, and in summer, a cooled temperature control fluid is allowed to flow through the temperature control fluid passage hole 1 to absorb heat energy due to sunshine, thereby preventing a rise in indoor temperature. If water is used as the temperature control fluid,
Water heated by sunshine can be used as hot water for baths and showers.

The hollow planar structure according to the present invention is not limited to the roof tile of the present embodiment, but is usually used in a plurality of units in which the temperature control fluid passage holes 1 are interconnected. For example, in the case of the roof tile of this example, the temperature control fluid passage holes 1 of the roof tile of the entire roof may be connected to each other to have a single temperature control fluid path. And the temperature control fluid passage hole 1 may be connected to the roof tile for each block, and the roof may have a plurality of temperature control fluid paths.

The synthetic resin used in the present invention is not particularly limited, but is preferably a thermoplastic resin.
S resin, polycarbonate resin, polycarbonate / A
Amorphous resins such as BS resins and modified polyphenylene ether resins, polyolefin resins such as high-density polyethylene resins and polypropylene resins, and crystalline resins such as polyamide resins and polyacetal resins are preferably used.

The synthetic resin used in the present invention may be selected according to the resistance to a temperature controlling fluid, the fire resistance, and other characteristics required as a building material. Also, if necessary,
For example, inorganic fillers such as talc, mica, calcium carbonate, ceramics, etc., organic fillers such as wood flour, fibrous wood, cellulosic fine powder, reinforcing fillers such as glass fiber, carbon fiber, synthetic fiber, halogen-based, phosphoric acid Ester type, polytetrafluoroethylene or calcium hydroxide,
Additives such as a flame retardant such as magnesium, a pigment, an antioxidant, and a light stabilizer may be added to the resin.

As the temperature controlling fluid (heating medium, refrigerant), generally known fluids are used, and for example, water, polyethylene glycol, air and the like can be used favorably.

As shown in FIG. 1 and FIG. 2, a hollow planar structure integrally formed with a temperature control fluid passage hole 1 along a gas channel 2 is, for example, Japanese Patent Publication No. 57-1496.
8 and British Patent Publication No. 2217644 can be easily manufactured by a gas assist injection molding method.

That is, as shown in FIG.
Using a mold 6 having a gas channel forming recess 5 for forming a thick gas channel 2 (see FIG. 2) along a position where the temperature control fluid passage hole 1 (see FIGS. 1 and 2) is formed,
As shown in FIG. 3 (b), the molten synthetic resin is injected into the mold 6 at a predetermined amount and at a predetermined pressure, and immediately after the completion of the injection or after a lapse of a very short time, as shown in FIG. After the pressurized gas is pressed into the synthetic resin in the gas channel forming concave portion 5 at the pressure described above, the gas pressure is maintained for a predetermined time, and after the molded product is cooled, the pressurized gas present inside the molded product is discharged The mold can be easily manufactured by opening the mold 6 and taking out the molded product.

In this gas assist injection molding method,
A temperature control fluid passage hole 1 is integrally formed as a hollow portion left in the passage of the pressurized gas. Since the pressurized gas has a property of penetrating along the thick part of the molded article having a small flow resistance, if the gas channel 2 is set in the molded article, the fluid for temperature adjustment is formed along the gas channel 2. The passage hole 1 can be formed integrally, and the flow path of the temperature control fluid passage hole 1 can be designed by the layout design of the gas channel 2. The shape of the gas channel 2 is not particularly limited. For example, the gas channel 2 may be configured as a continuous rib-shaped protrusion having a semicircular cross section, a rectangular shape, or the like.

As the pressurized gas, carbon dioxide gas, air or the like can be used, but an inert gas such as nitrogen is preferable.
The pressurized gas can be injected by providing a gas injection needle at a desired position in a nozzle, a sprue, a runner, or a mold cavity. The location from which the pressurized gas is injected is determined by the shape of the molded product and the gate design. The position of the gas injection port is set so that the pressurized gas is guided to the gas channel 2.

Next, based on FIGS. 4 and 5, another example of the temperature-controllable hollow planar structure according to the present invention (thick plate material)
Will be described.

The thick plate material according to the present embodiment is used, for example, as a floor material, a wall material, or the like.
It is formed in a zigzag shape by partition walls 7 alternately projecting from both sides.

The hollow planar structure having a high hollow ratio, such as the above-mentioned thick plate, can be easily manufactured by gas-assisted injection molding using a movable core described in Japanese Patent Publication No. Hei 7-12621. it can.

That is, as shown in FIG.
As shown in FIG. 6B, a movable core 9 capable of protruding into the cavity 8 and retreating from this protruding position is provided with a mold 10 provided at the partition wall 7 forming position in the cavity 8. The molten synthetic resin is injected into the cavity 8, and immediately after the injection is completed or after a lapse of a short time, a pressurized gas is injected into the synthetic resin with the movable core 9 protruding into the cavity 8, and the preliminary hollow molded body is formed. Is formed, and then FIG.
As shown in the figure, the hollow portion is expanded by retracting the movable core 9, and after cooling the molded product while maintaining the gas pressure, the pressurized gas existing inside the molded product is discharged, and then the mold is formed. It can be easily manufactured by opening 10 and taking out the molded product.

In the gas-assisted injection molding method using the movable core 9, the pressurized gas press-fitted after the injection of the synthetic resin is applied to each movable core 9 by projecting the movable core 9 into the cavity 8. It flows through the space 9 to form a hollow portion there. When the movable core 9 is retracted, the synthetic resin flows so as to fill the retracted trace of the movable core 9 to form the partition wall 7, and the hollow portion is enlarged by the pressure of the pressurized gas, The zigzag temperature control fluid passage holes 1 having a large sectional area and alternately projecting from both sides are integrally formed.

In the gas-assisted injection molding using the movable core 9, a mold 10 capable of expanding the cavity volume by moving the cavity surface (moving in the opening direction of the mold 10) is used. After the gas is injected, as shown in FIG. 6 (d), when the movable core 9 is retracted and the cavity volume is increased by moving the cavity surface, a thicker and larger cross-sectional area for temperature control is obtained. Fluid passage hole 1
Can be obtained as a thick plate material.

[0030]

EXAMPLES Example 1 Modified polyphenylene ether (“Zylon 540Z” manufactured by Asahi Kasei Corporation), deflection temperature under load (ASYM-D648)
A roof tile as shown in FIGS. 1 and 2 was obtained by the gas-assisted injection molding method described with reference to FIG. 3 using 120 ° C., UL-94 standard, 0.8 mm thickness V-0).

Heat-resistant rubber hoses are arranged at both ends of a temperature control fluid passage hole formed integrally along the gas channel,
With one of the rubber hoses connected to a tap and the other open, place the roof tile in an oven set at 70 ° C. and expose tap water to the hollow structure while exposing it to a heated atmosphere.
Continued flowing for hours.

Next, the supply of water was stopped, the roof tile was taken out of the oven, and the temperature of the roof tile surface was immediately measured by a thermocouple. The temperature of the roof tile surface was 30 ° C.

Example 2 Polypropylene ("Mitsui Noblen J, manufactured by Mitsui Toatsu Chemicals, Inc.)
HH-G "), and a thick plate material as shown in FIGS. 4 and 5 was obtained by the gas-assisted injection molding method using the movable core described in FIG.

A heat-resistant rubber hose is provided at both ends of a temperature control fluid passage hole formed integrally in a thick plate material. One end of the rubber hose is connected to an air supply port of a hot air dryer, and the other end is opened. Place the plate in a constant temperature room at 23 ° C,
Hot air was kept flowing for one hour.

Next, the supply of hot air was stopped, and the temperature of the surface of the thick plate material was immediately measured with a thermocouple. The temperature of the thick plate surface was about 50 ° C.

[0036]

As described above, the present invention has a temperature control fluid passage hole 1 integrally formed therein by injection molding, so that the structure is simple and It can be easily manufactured by using the gas assist molding method, and can provide a hollow surface-shaped structure whose temperature can be adjusted at a low price.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of a temperature-adjustable hollow planar structure (roof tile) according to the present invention.

FIG. 2 is a longitudinal sectional view of the hollow planar structure shown in FIG.

FIG. 3 is an explanatory diagram of a method of manufacturing the hollow planar structure shown in FIG.

FIG. 4 is a plan view showing another example (thick plate) of the hollow planar structure capable of adjusting the temperature according to the present invention.

5 is a longitudinal sectional view of the hollow planar structure shown in FIG.

6 is an explanatory diagram of a method for manufacturing the hollow planar structure shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Temperature control fluid passage hole 2 Gas channel 3 Adhesive layer 4 Surface layer 5 Gas channel forming recess 6 Mold 7 Partition wall 8 Cavity 9 Movable core 10 Mold

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI E04D 1/24 E04D 1/24 A 13/00 13/00 F F24D 3/16 F24D 3/16 B A // B29L 31:10

Claims (9)

[Claims] 1. An integrated synthetic resin injection-molded product, wherein a series of temperature control fluid passage holes through which a temperature control fluid injected from one end can be discharged from the other end are integrally formed. A temperature-controllable hollow planar structure characterized by the following. 2. The temperature-controllable hollow surface-like structure according to claim 1, which is a building material. 3. The temperature-controllable hollow surface according to claim 1, wherein the temperature control fluid passage hole is formed along a partially provided gas channel having a large thickness. Structure. 4. The temperature-controllable hollow planar structure according to claim 1, wherein the temperature control fluid passage holes are formed in a zigzag shape by partition walls protruding alternately from both sides. 5. A temperature control fluid passage hole comprising a plurality of interconnected units, with the temperature-adjustable hollow surface-shaped structure according to claim 1 as one unit. Temperature adjustable hollow planar structure. 6. A temperature-adjustable hollow planar structure characterized in that a temperature-adjusting fluid passage hole is integrally formed inside a synthetic resin injected into a mold by pressurizing a pressurized gas. Manufacturing method. 7. A mold having a gas channel forming recess for forming a thick gas channel along a position where a temperature control fluid passage hole is formed, and pressurized gas is introduced into the synthetic resin in the gas channel forming recess. 7. The method for manufacturing a temperature-controllable hollow planar structure according to claim 6, wherein the temperature control fluid passage hole is integrally formed along the gas channel by press-fitting. 8. A synthetic resin is injected into the cavity by using a mold provided with a movable core capable of projecting into the cavity and retreating from the projecting position at a partition wall forming position in the cavity. The pressurized gas is pressed in with the movable core protruding into it, and the movable core is retracted to form a zigzag temperature control fluid passage hole integrally formed by partition walls that alternately protrude from both sides. 7. The method for producing a temperature-adjustable hollow planar structure according to claim 6, wherein: 9. A mold in which a movable core capable of protruding into the cavity and retracting from the protruding position is provided at a partition wall forming position in the cavity, and the cavity volume can be increased by moving the cavity surface. Used to inject synthetic resin into the cavity, press-fit a pressurized gas with the movable core projecting into the cavity, and retract the movable core and expand the cavity volume by moving the cavity surface. so,
7. The method for producing a temperature-adjustable hollow planar structure according to claim 6, wherein zigzag-shaped fluid passages for temperature adjustment are formed integrally by partition walls alternately projecting from both sides.