JP2021034361A - Far-infrared heating unit - Google Patents

Abstract

To provide a far-infrared heating unit capable of being heated to 800°C which is a temperature required for resin heating and achieving short time required for a rise to the heating temperature.SOLUTION: The far-infrared heating unit includes: a stainless heating plate 1; an upper soaking plate and a lower soaking plate made of stainless, mounted on the heating plate 1 and arranged to face the top and bottom of the heating plate 1; a plurality of sheath heaters 4 arranged in parallel between the upper soaking plate and the lower soaking plate; a heat insulator 5 arranged on the upper soaking plate ; and a partition plate 7 for partitioning a space part 6 provided between the upper soaking plate and the heat insulator 5.SELECTED DRAWING: Figure 1

Description

The present invention relates to a far infrared heating device used for heating and / or drying a resin.

Patent Document 1 describes a heating plate in which a heat equalizing plate in which a sheathed heater is brazed is attached to the lower surface of a thin-walled face plate made of a material having strong thermal strain and heat resistance, and a sheathed heater is brazed on a metal heat equalizing plate. The brazed heat soaking plate is disclosed. This heating plate cannot be heated to 800 ° C., which is the temperature required for heating the resin, has a maximum of 500 ° C., and has drawbacks such that it takes time to heat and dry.

JP-A-2002-359062

The resin can be heated to 800 ° C., which is a temperature required for heating the resin, and the time required for the resin to rise to the heating temperature can be shortened.

The present invention relates to a far-infrared heating device that heats and / or dries a resin, and the far-infrared heating device includes a stainless steel heating plate and upper and lower soaking plates arranged above and below the heating plate. A sheathed heater provided in parallel between the upper and lower heat equalizing plates and a heat insulating material arranged on the upper heat equalizing plate, and heat insulating with the upper heat equalizing plate. A partition plate for partitioning a space provided between the material and the material is provided.

The far-infrared heating device is preferably used for heating before pressing at the time of molding the resin. ..

The heating plate is heat-treated and preferably has an emissivity of 90% or more.

It is preferable that the added sheathed heater includes a heater wire leading to the space portion, and the heater wire is arranged from a heating plate and / or a rising portion to a position of 30 to 40 mm.

The sheathed heater is preferably provided with a terminal insulator at the upper end of the heater wire, and the temperature in the vicinity of the terminal insulator is preferably 500 ° C. to 650 ° C.

It is preferable that the sheathed heater is brazed and even fixed to the heating plate.

The maximum surface temperature of the stainless steel heating plate is preferably 750 ° C.

The far-infrared heating device preferably includes a panel heater.

According to the far-infrared heating apparatus of the present invention, the resin can be heated to 800 ° C., which is a temperature required for heating the resin, and the time required for the rise to the heating temperature can be shortened.

It is sectional drawing which shows the far infrared ray heating apparatus which concerns on this invention. It is an array diagram of the sheathed heater of the far-infrared heating apparatus which concerns on this invention. It is another arrangement diagram of the sheathed heater of the far-infrared heating apparatus which concerns on this invention. It is the schematic of the sheathed heater of the far-infrared heating apparatus which concerns on this invention.

Hereinafter, one embodiment of the present invention will be specifically described with reference to the accompanying drawings.
FIG. 1 is a cross-sectional view showing a far-infrared heating device according to the present invention.
The far-infrared heating device 100 according to the present invention is used for heating and / or drying the resin. The far-infrared heating device 100 includes a stainless steel heating plate 1, a stainless steel upper heat equalizing plate 2 provided on the heating plate 1 and arranged facing the top and bottom of the heating plate 1, and a stainless steel lower heat equalizing plate 2. A plurality of sheathed heaters 4 arranged side by side between the plate 3 and the upper and lower heat equalizing plates 2 and 3, and a heat insulating material 5 arranged on the upper heat equalizing plate 2. A partition plate 7 for partitioning a space 6 provided between the upper heat equalizing plate 2 and the heat insulating material 5 is provided. A plurality of sheathed heaters 4 arranged side by side are sandwiched between upper and lower heat equalizing plates 2 and 3 and fixed by heater fixing metal fittings 8 such as screws to form a fixed portion.

The far-infrared heating device includes a thermocouple 9 for detecting the surface temperature of the stainless steel heating plate 1, and includes a thermocouple fixing portion 10 fixed to the heating plate for fixing the thermocouple. The thermocouple 8 is preferably provided substantially in the center of the heating plate.

The stainless steel heating plate 1 is heat-treated and preferably has an emissivity of 90% or more. The maximum surface temperature of the stainless steel heating plate is preferably 750 ° C.

The arrangement of the sheathed heaters is shown in FIGS. 2 and 3. In FIG. 2, the heater fixing bracket 8 is a heater overall fixing bracket that integrally fixes all a plurality of sheathed heaters arranged side by side along the shape around a rectangular heating plate. 11 and a heater partial fixing bracket for fixing a part of the seed heaters arranged inward from the sheathed heaters arranged on the outermost side among all the plurality of seeds arranged side by side are shown. These fixing brackets are preferably fixed by the sheathed heater fixing bracket 8 so as not to be deformed by heat when the temperature of the sheathed heater reaches a maximum of 750 ° C.

In FIG. 3, the sheathed heater fixing bracket 8 includes a plurality of heater overall fixing brackets 11 for integrally fixing all the plurality of sheathed heaters arranged in parallel in the longitudinal direction of the rectangular shape of the heating plate. Be prepared. The entire heater fixing bracket 11 is provided across a plurality of sheathed heaters arranged in parallel in the longitudinal direction.

FIG. 4 shows a schematic view of the sheathed heater. The sheathed heater is configured such that a nichrome wire 13 is arranged inside so that the heating temperature can reach a maximum of 750 ° C. at the center inside the heating surface. Calorific value: Has a rating of 3.5 W / cm ² . The sheathed heater has an internal nichrome wire arranged from the heating plate and / or the rising portion of FIG. 1 to a position of 30 to 40 mm. A terminal insulator 14 is provided at the end of the sheathed heater via an unsealed opening. The temperature near the terminal insulator is preferably 500 ° C to 650 ° C. The sheathed heater 4 is preferably brazed and fixed to the heating plate 1.

Heating and / or drying of resin products, drying after painting, heating before pressing during resin molding

1; heating plate 2; upper heat equalizing plate 3; lower heat equalizing plate 4; seeds heater 5; heat insulating material 6; space 7; partition plate 8; heater fixing bracket 9; thermocouple 10; thermocouple fixing part 11; seeds Heater whole fixing bracket 12; Seeds heater partial fixing bracket 13; Nichrome wire 14; Terminal porcelain

Claims (7)

A stainless steel heating plate, upper and lower heat equalizing plates provided on the heating plate and arranged facing each other above and below the heating plate, and the upper and lower heat equalizing plates arranged side by side. Far-infrared heating including a sheathed heater arranged in a row, a heat insulating material arranged on the upper heat equalizing plate, and a partition plate for partitioning a space provided between the upper heat equalizing plate and the heat insulating material. apparatus. The far-infrared heating device according to claim 1, wherein the heating plate has been heat-treated and has an emissivity of 90% or more. The distance according to claim 1, wherein the added sheathed heater is provided with a heater wire inside, and the heater wire is arranged from a heating plate and / or a rising portion to a position of 30 to 40 mm. Infrared heater. .. The far-infrared heating device according to claim 1, wherein the addition sheathed heater is provided with a terminal insulator at the upper end, and the temperature in the vicinity of the terminal insulator is 500 ° C. to 650 ° C. as a special lecture. The far-infrared heating device according to claim 1, wherein the sheathed heater is brazed and even fixed to a heating plate. .. The far-infrared heating device according to claim 1, wherein the maximum surface temperature of the stainless steel heating plate is 750 ° C. .. The far-infrared heating device according to claim 1, wherein the far-infrared ray heating device includes a panel heater.

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