JPS62256396A - Divided variable calorie type heater - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention is applicable to heating presses for forming, packaging, sealing,
83 flPI is applied to heating rolls used for rolling etc.
Cartridge heaters used as % sources, and sheathed heaters used to heat liquids, gases, the entire bottom surface, etc., are electric heaters in which heat-resistant insulating powder is filled in the voids in a metal exterior body.

[Prior art] Cart 1] As is well known, the Tsuji heater is a heating wire wound around a helical core with a lead wire inserted through it, loaded into a fully bent exterior tube, and a heat-resistant insulating powder filled in the gap on the outer periphery. This is a metal exterior heater whose diameter has been reduced and sealed, and it is used by inserting it into a gold hole Q.

In addition, a sheathed heater usually has a structure in which a heating wire with terminals connected to both ends is placed in the center of an exterior metal tube, and the cavity is densely filled with heat-resistant insulating powder, allowing it to handle liquids, gases, metals, etc. It is known as a metal-clad heater that can be used in an extremely wide range of applications, regardless of whether it is a solid material, direct heating, or circumferential heating.

[Problems to be Solved by the Invention] In such metal-clad heaters, for example, taking a cartridge heater as an example, m1111Ah4h+
1-#lim=Is1nAn #, lIMff
llJ, ffl:'In';lil#n), there was a drawback that the temperature at the outer edge or both ends inevitably became lower than the temperature at the center. The occurrence of temperature irregularities such as temperature fluctuations causes variations in the quality of finished products and must be suppressed as much as possible.

One idea is to change the pitch of the heating wires wound around the ceramic core in the axial direction. Of course, this is a method of increasing the heat generation m at both ends by making the pitch at both ends closer than the center of the heater. However, at surface temperatures of 2.00 to 400°C, ±2 to
For objects that cannot be accommodated with a variation of about 4 degrees, this cannot fully meet the requirements, and the development of a cartridge heater capable of finely controlling the temperature has been desired.

Therefore, the purpose of the present invention is to improve this type of problem in so-called full-bending exterior heaters such as cartridge heaters and sheathed heaters, and to make the temperature distribution state in the heated object as uniform as possible. Another object of the present invention is to provide a full-bending exterior heater that allows fine temperature control and allows the heat m to be arbitrarily and easily variably adjusted depending on the object.

c Means to solve the problem J In order to achieve the above object, the fully bent exterior heater according to the present invention divides the heating wire, which was previously connected continuously, into a plurality of sets in the longitudinal direction of the metal exterior body. 11. Therefore, this is a variable thermometer type heater of the minute υ1 type, in which separate and independent heat generating parts are constructed, and the electric capacity can be arbitrarily varied in each heat generating part.

[Function] As described above, when the heating wire is divided into a plurality of groups in the longitudinal direction in the wooden fully bent exterior heater 811 to form separate and independent heat generating parts, the electric capacity can be arbitrarily changed in each heat generating part. It is variable, and zero heat generation can be adjusted individually. Therefore, not only can the temperature distribution in the longitudinal direction of the heater be made uniform, but also when using multiple heaters in parallel,
The heat generation m can be made uniform over the entire area.

Of course, it is also possible to partially adjust the heat generating portion depending on the location, and it is also possible to adjust the heat generation m depending on the object.

[Example] Hereinafter, as an example, a three-part type variable thermal concave cartridge heater will be further described in detail according to an example shown.

In Figures 1 and 2, symbols (a), (b) and (C)
Shown are heat generating parts that are installed separately in a divided state, with ceramic cores 1a and 1b, respectively.

1C, and heating wires 2a12b and 2C wound around its outer periphery. 3a, 3b, and 3G are respective lead wires, and 4 is a neutral wire. 5 is an exterior metal tube (metal exterior body), 6 is a heat-resistant insulating powder filled in the gap, 7 is 11 months, and 8 is a thin wire. Fig. 3 shows an example of the wiring state. There is.

Fig. 4 shows a total of 30 cartridge heaters, 15 pieces each, inserted into the upper and lower holes, which do not show an example of application to a heating press.
L n, ■), and the vertical zone was also divided into three zones a, b, and c according to the heater heat generating part, and while adjusting the temperature, we tried adjusting the power for each slope measurement with U Rocross. .

When the actually used surface of the heat source 9 is vertically JM50Q nut, the accuracy is ±1.0 to 1.5 at a surface temperature of 200°C.
- (conventional accuracy ±5.0), accuracy was 1.5 to 2.0 (conventional vJ degree +7.0') at 400°C.

Also, if the actual surface used is 600 shoes in length and width, the surface temperature will be 20.
Viscosity ±2.0 to 3.0 at 0°C (conventional viscosity ±9.0
), the viscosity was ±2.5 to 4.0 (conventional accuracy ±10) at 400°C.

In the above description, the three-division type has been described, but the invention is not limited to this, and it is natural to divide it into an appropriate number of parts by 1η. In addition, all the lead wires including the neutral wire are pulled out from one side, but the other end of the fully bent outer tube is also sealed.
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It is also possible to divide the lead wires and neutral wires of bsC, PIIII, tr, or other appropriate groups into left and right sides.

In addition, although the explanation has been made using a cartridge heater as an example, the invention is not necessarily limited to this, and as already mentioned, in a fully bent exterior heater such as a sheathed heater, multiple sets of heating wires are arranged in the longitudinal direction of the metal exterior body. By arranging the heat generating parts separately and arranging them to form separate and independent heat generating parts, the electric capacity can be made arbitrarily variable in each heat generating part.

[Effects of the Invention] As described above, the metal exterior heater according to the present invention is a split-type variable heat m-type heater divided into υ1 parts in the longitudinal direction of the metal exterior body, and the independent heat generating parts can be individually controlled. ±2.0
This makes it possible to provide a heater that is optimal as a heating source for objects that only allow a slight variation of about 4.0.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a cartridge heater shown as an example of a split type variable heat m-type heater according to the present invention, FIG. 2 is a front view of the same, and FIG. 3 is a wiring diagram. An example of f-ta is shown. FIG. 4 is a plan view of an example of application of a hot press to a cup. a, b, c...Heating parts 2a, 2b, 2c...Heating wire 5...Exterior metal tube (metal exterior body) 6...
・Heat-resistant insulation powder

Claims (1)

[Claims] (1) In a heater having a heating wire disposed by filling a cavity with heat-resistant insulating powder in a metal exterior, the heating wire is divided into multiple sets in the longitudinal direction of the metal exterior to create separate and independent heat generating parts. What is claimed is: 1. A split type variable calorific value type heater comprising: a split type variable heat amount type heater, characterized in that the electric capacity can be arbitrarily varied in each heat generating part;