CN2310302Y

CN2310302Y - Ceramic crucible

Info

Publication number: CN2310302Y
Application number: CN 97236543
Authority: CN
Inventors: 苏君道; 苏平宇; 苏澄宇
Original assignee: 苏君道
Priority date: 1997-07-11
Filing date: 1997-07-11
Publication date: 1999-03-10
Anticipated expiration: 2007-07-11

Abstract

The utility model relates to a ceramic crucible. The ceramic crucible forms a back taper shape and has small mouth and big bottom. The shape and the structure of the utility model are suitable for superimposed ceramic crucible. The service life of the crucible is extended, and the crucible with a thin wall is easily manufactured. Consequently, the volume of the crucible is enlarged. The die is changed into a split mounting type die, when the ceramic crucible is made. The die can be dismounted, and is convenient for die release. The core can be loosed.

Description

A kind of ceramic crucible

The utility model relates to a kind of making of refractory material vessel, especially the improvement of the structure of refractory crucible and shape.

The ceramic crucible of making of refractory material (claiming saggar, earthen bowl again) has application very widely as kiln furnitures in material industry, be used for sintering electronic material, inolrganic chemicals, magnetic material, abrasive material, fluorescent material and as for metal smelt, serviceability temperature is at 1000-1500 ℃ even higher, ceramic crucible commonly used is made by ceramic materials such as aluminium oxide, zirconia, corundum, also is a purposes class ceramic crucible the most widely.How existing ceramic crucible also is shaped with ramming, slip casting or machine pressing, general because its wall is too thick, and its dischargeable capacity is little, and high-temperature behavior is also poor, causes service life short.In addition, medium-and-large-sized cuts open in the use of burning stove or other kiln, ceramic crucible need be happened frequently, to make full use of the volume of furnace chamber.But existing ceramic crucible generally is taper in shape, for the ease of the overlapping superposition of multilayer, and the ceramic crucible of accidental cylindricality, but also to design draw taper.The ceramic crucible of above-mentioned two kinds of shapes only could be overlapping when wall thickness is enough big, nonetheless, because ceramic crucible edge (oral area) to lower floor's ceramic crucible when overlapping in upper strata produces an outside horizontal component.Anti-shear performance, stretch-proof, anti-bending strength are poor and the compressive property of ceramic material is good, through high temperature be easy to cause lower floor ceramic crucible oral area cracking when overlapping especially again, overlapping part is also bumped down potsherd easily may participate in being cutd open the reaction of burning thing, can influence the quality of cuing open burning, greatly reduce service life, according to factory statistics, lower floor's ceramic crucible reduces by 70% service life.

The purpose of this utility model is the weak point that overcomes above-mentioned ceramic crucible, and a kind of shape and the good ceramic crucible of structure tool are provided, and especially can prolong the service life of crucible greatly, also can make the thin-walled crucible.

Other purpose of the present utility model is listed in specification in addition.

The purpose of this utility model is achieved in that makes the big inverted cone shape in the little bottom of oral area with ceramic crucible.

The utlity model has following characteristics: the stress that can guarantee oral area and upper strata ceramic crucible bottom is obviously improved, overcome the weak point of above-mentioned ceramic crucible, provide a kind of shape and structure to be suitable for overlapping ceramic crucible, can prolong the service life of crucible greatly, also make the thin-walled crucible easily, thereby enlarged the volume of crucible.

The utility model is described in further detail below in conjunction with accompanying drawing with by embodiment:

Fig. 1 is a cross section structure schematic diagram of the present utility model, provides two simultaneously and is overlapping user mode.

As shown in the figure, the profile of ceramic crucible without limits, and is cylindrical, the truncated cone-shaped ceramic crucible is the most common.If but be used for the ceramic crucible of overlapping use, and can make full use of furnace inner space, the most commonly cross section is rectangle or foursquare ceramic crucible, ceramic crucible is also for making behind base, shaping, the sintering.

The oral area 2 of crucible 1 inwardly shrinks, and the angle of inclination of its sidewall is the 0.4-3 degree, and the angle of inclination is as much as possible little, if the bottom that reaches crucible when overlapping and oral area certain contact-making surface is arranged so that the demoulding.For example, when the bottom width of one crucible (or diameter) is 200mm, oral area width (or diameter is) is 190mm, highly be 150mm, 5mm is shunk on every limit during the crucible of rectangle, and footpath, the general end is than the big 4-10mm of bore, even the oral area amount of contraction hour, lower crucible also is that resistance to compression support rather than stretch-proof are supported to the support of top crucible, and level is obviously reduced by pulling force.Mechanical analysis shows that when oral area shrank 5mm, the horizontal component that last crucible acts on down crucible reduced 81%.The radian at the base angle of crucible (inner surface arc and outer surface arc) is made two arc transition, and one section circular arc r is less in right angle portion, and is bigger on base, bight and junction, angle circular arc R, to guarantee bight wall thickness even transition, does not influence wall thickness.

The top edge of crucible has breach, is equipped with the hole of rectangle as four limits of rectangle, the heat transmission during for sintering.

Crucible can be made into light in the outer hair, and inner wall smooth can satisfy user's requirement, and outer wall is coarse, not late generation be full of cracks.This is that ceramic sand grains is given prominence to and improved the force-bearing situation of ceramic crucible contact-making surface up and down because outside coarse.

Change mould into the pin-connected panel mould when ceramic crucible is made, can loose core, dismantle, be convenient to the demoulding.

Claims

1. ceramic crucible, what it is characterized in that ceramic crucible is shaped as the big inverted cone shape in the little bottom of oral area.

2. by the described ceramic crucible of claim 1, the footpath, the end that it is characterized in that described ceramic crucible is than the big 4-10mm of bore.

3. by claim 1,2 described ceramic crucibles, it is characterized in that the radian at the base angle of described crucible is made two arc transition, less at one section circular arc of right angle portion (r), bigger on base, bight and junction, angle circular arc (R).

4. by claim 1,2 described ceramic crucibles, it is characterized in that described crucible makes inner wall smooth, outer wall is coarse.