A kind of press-molding method and equipment for refractory box and refractory box

Abstract

The invention discloses a method for pressing and forming a refractory box, which comprises the following steps: distributing refractory box powder according to a preset height into a mold cavity formed by a mold frame, a bottom lower mold core and a side lower mold; the bottom lower mold core and the side lower mold The mold divides the refractory box powder located above it into a bottom powder aggregate and a side powder aggregate; the upper mold core is pressed down to the mold cavity, and the bottom lower mold core moves downward, so The side lower mold is lifted upward, and the refractory box is formed by the relative movement of the upper mold core, the bottom lower mold core and the side lower mold; during and after the pressing process, the bottom powder aggregate and the side powder aggregate are aggregated. The compression ratio of the body remains the same. Correspondingly, the present invention also discloses a press-forming device for a refractory box and a refractory box. The implementation of the present invention can effectively improve the uniformity of different positions of the refractory box, prevent its forming and fracture, and reduce defects such as forming cracks.

Description

technical field [0001] The invention relates to the technical field of presses and press molding, and in particular, to a press-molding method, equipment and a refractory box for a refractory box. Background technique [0002] Refractory saggar, also known as saggar, is a common kiln furniture, which generally has a bottom A and a side B (see figure 1 ), the bottom of which is generally rectangular. In use, the refractory box is generally required to have better refractoriness, high temperature structural strength and thermal stability. The guarantee of these characteristics depends on good pressing. One of the refractory boxes needs to be pressed uniformly and the density is consistent; the two refractory boxes should not have defects such as cracks. [0003] In the prior art, in order to ensure uniformity and density, the saggar is generally formed by isostatic pressing (eg CN109551612A); however, the isostatic pressing has low efficiency, complicated equipment structure...

AI Technical Summary

Problems solved by technology

However, this form of pressing is difficult to ensure that the side and bottom have the same compression ratio, and it is difficult to ensure uniformity

In addition, this molding process tends to cause cracks or crack defects at the connection between the side and the bottom during the pressing process, resulting in a decrease in the high-temperature structural strength of the refractory box

In addition, the form of this mold is fixed, so it is difficult to apply to the production of refractory boxes of various sizes

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