Heat-resistance protective tube and its mfg. method

A manufacturing method and heat-resistant technology, which can be applied to thermometers that are directly sensitive to heat, measuring heat, thermometer parts, etc. And other issues

Active Publication Date: 2006-02-01
HERAEUS ELECTRONITE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In addition, a certain space is formed on the outer periphery of the paper tube with a cover, and mud flow flows into the space. After curing, the cover is removed. Although there is a drying method, the surface of the exterior material is severely uneven, the dimensional accuracy is poor, and it may induce sputtering. Scattering of molten metal
[0007] In addition, when using unsintered diatomaceous earth, etc., because it is not sintered, it contains crystal water, which is rapidly gasified and released when immersed in molten metal, and sputtering often occurs.

Method used

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  • Heat-resistance protective tube and its mfg. method
  • Heat-resistance protective tube and its mfg. method
  • Heat-resistance protective tube and its mfg. method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Add 2% by weight of aluminum oxide as a secondary component of heat-resistant inorganic powder and 2% by weight of glass fiber as inorganic fiber to diatomite with an average particle size of 13.4 μm and heat-treated at a temperature above 1000°C to form an inorganic mixed powder , adding as additives to the inorganic mixed powder, an organic dispersant sodium polycarboxylate aqueous solution, an organic binder carboxymethyl cellulose, and an inorganic binder silica gel at a solid content conversion of 10% by weight. Then, ion-exchanged water corresponding to 10% by weight or 70% by weight of the solid content was added thereto, stirred with a kneader, and mixed to obtain a clay-like molding material. Put the obtained molding material into a vacuum extrusion molding machine cooled to 0°C to 10°C.

[0042]The vacuum extrusion molding machine used in Example 1 has a head at the front end of the drum. A paper tube is inserted into the space part provided at the center of ...

Embodiment 2

[0045] Containing 83.5% by weight of diatomite heat-treated at a temperature above 700°C with an average particle size of 18.6 μm, 8.5% by weight of olivine sand with an average particle size of 40-50 μm, and 5% by weight of glass fibers as inorganic fibers. In the thermal inorganic powder, add inorganic dispersant sodium hexametaphosphate, organic binder, 3% by weight (corresponding to the ratio of diatomaceous earth, olivine sand and glass fiber total amount) in terms of solid content as additives. Agent carboxymethyl cellulose, inorganic binder sodium silicate, and then add ion-exchanged water corresponding to 3% by weight of solid content equivalent to 50% by weight, stir with a kneader, and mix to make a clay-like molding material. Put the obtained molding material into a vacuum extrusion molding machine cooled to 0°C to 10°C.

[0046] In Example 2, the same vacuum extrusion molding machine having a head as in Example 1 above was used. A paper tube was inserted into the...

Embodiment 3

[0048] Containing 46.5% by weight of diatomite with an average particle size of 18.6 μm that has been heat-treated at a temperature above 700°C, 18.5% by weight of wollastonite with an average particle size of 17.6 μm and an aspect ratio of 10 to 20, and 28% by weight of average particle size In the heat-resistant inorganic powder of olivine sand with a diameter of 40 to 50 μm, an organic compound of 7% by weight (corresponding to the total amount of diatomaceous earth, wollastonite, and olivine sand) was added as an additive. Dispersant sodium polycarboxylate aqueous solution, organic binder polyvinyl alcohol, inorganic binder silica gel and aluminum glue, and then add ion-exchanged water corresponding to 7% by weight of solid content equivalent to 45% by weight, and stir with a kneader , mixed to make a clay-like molding material. Put the obtained molding material into a vacuum extrusion molding machine cooled to 0°C to 10°C.

[0049] This embodiment 3 uses the vacuum extru...

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Abstract

A method for preparing heat ¿C resisting protection tube includes using 98.5 wt % of heat ¿C resisting inorganic power in 85 wt % of solid composition and 1.5 wt % of solid composition in 15 wt % of additives as raw materials; mixing said heat ¿C resisting inorganic power, said additives with water or organic solvent for preparing mixture; forming mixture to be tube shaped body and drying tube shaped body for obtaining final product.

Description

technical field [0001] The present invention relates to a heat-resistant protective tube and a method for manufacturing the same, which enable the use of measuring units such as thermocouples for high-temperature protection. Background technique [0002] Conventionally, temperature measurement of molten metal has been carried out by immersing a probe in molten metal at approximately 1000°C to 1700°C for approximately 5 to 10 seconds. The probe generally uses a paper tube, but the moisture and organic components contained in the paper tube gasify and burn rapidly at high temperature. At this time, the gas generated will scatter the molten metal, and the operator may be injured. In addition, the paper tube is easy to burn and disappears in a short time, especially at a high temperature above 1600°C, and the fixture is often damaged, etc., and often cannot perform its full function. [0003] As the outer material of the paper tube, pulp products in which clay minerals are disp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K1/12G01K7/02
Inventor 岩村洋志寺内幸生北村治雄古家智宏
Owner HERAEUS ELECTRONITE CO LTD
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