SU1052335A1 - Mould for sintering powder gas absorbers - Google Patents

Abstract

A FORM FOR SINTERING POWDER GAS-ABSORBERS, including a multi-seat matrix and fastening tape elements, characterized in that, in order to improve sintering performance and improve the quality of products, it is provided with overlapping plates, and the matrix is made with longitudinal and transverse slots installed in the level with the plate matrix, and in the longitudinal - oval powder cells and fastening tape elements. O) C,

Description

The invention relates to the manufacture of high-purity titanium metallurgy, and more specifically to molds for the manufacture of highly porous titanium gas getters by sintering. A known form for the manufacture of porous titanium getters. by cold pressing the powder under pressure of 60-6000 kgf / cm with subsequent sintering in vacuum. However, these forms and the manufacturing process itself do not provide sufficient porosity of gas absorbers that have a low sorption rate and low sorption capacity. All this limits the use of molds for pressing porous fasteners. Closest to the proposed technical essence and the achieved result is the form for sintering powdered getters including a multi-bed matrix and fastening tape elements p. The disadvantage of the specified form. is that when it is assembled, fixing fasteners along the axis of the die holes is difficult. , At the moment of filling the mold with powder, the powder gets into the gap between the matrix and the base, which makes it difficult to disassemble the mold after sintering and makes it necessary to strip the bridge and the matrix from the coated layer. In addition, the vertical location of the zooplorer reduces the amount of open porosity by 5–10% due to the powder column, which increases the pressure during sintering, which degrades the quality of the products. With the help of this form, only cylindrical gas absorbers are made, when placed on flat and round surfaces, a low space trapping coefficient is obtained by the gas absorbing material. The purpose of the invention is to increase the productivity of sintering and improve the quality of products. . The goal is achieved by the fact that the sintering form for powder getters, including a multi-bed matrix and fixing tape elements, is provided with overlapping plates, the matrices being made with longitudinal and transverse slits, set in a transverse slit with a plane of the matrix plate, and in longitudinal ones oval powder cells and fixing, tape elements. FIG. 1 shows the form, top view f in FIG. 2 is a section A-A in FIG. one; in fig. 3 — manufactured products, view caepxyj see, 4. The same, side view in FIG. 5 is a section BB in FIG. 3. The form consists of a matrix 1, in which blank oval cells 2 are made. The longitudinal grooves 3 are made along the major axis of the cells, have a width of 1/2 the width of the cell and serve for fixing them with fastening elements (traverse belts) 4, the transverse grooves 5 serve to accommodate the overlapping plates 6. The latter are mounted flush with the upper plane of the mold. The depth of the cells 2 is twice the depth of the longitudinal chucks 3, the Form works as follows, the fastening elements 4 (nickel tapes) are installed in the longitudinal grooves 3 of the matrix 1, then the plates 6 are inserted into the transverse grooves 5, which fix the elements 4 and close the powder from falling on them when filling the cells. The cells of the matrix are filled with the powder in a level with the upper plane of the form. The filled-in forms establish one on another. Each top form serves as a cover for the bottom i last. The top form is closed with a plate-cover (not shown). . The packaged forms are installed in a vacuum oven and the gas absorbers are caked according to the technology. After sintering the getters, the furnace is unloaded and cleaned out the LAY powder layer protruding above the level of the matrix plane. The shape of the mold is produced in the reverse order. First, plates 6 are removed, and then, pulling the traverse tape from both sides of the cell, the getter block with getters is removed (FIG. 2). After disassembly, if necessary, the getter block is cut into separate getters. When applying the proposed form, the processes of backfilling, sintering, stripping loose layers, cutting getter blocks are easily prevented by mechanization. During sintering, gas absorbers are placed horizontally, which makes it possible to reduce pressure on the spray during sintering due to a decrease in the tolerance of the sintered layer, due to which the open porosity of the gas absorbers is increased by 5-10%. Performance in the manufacture of gas absorbers using the form increased by 3-5 times. The economic effect of using the proposed getters leaves for every million pieces at least 500 TVS, RUR. .

Zhi.iSh

“AU / 77/7 // 7GU //.

2

 at

Figz

Fig: ff - 6 ttpfe / fHynw

Claims (1)

A Sintering Form for Powder Gas Absorbers, including a multi-seat matrix and fastening belt elements, characterized in that, in order to increase the sintering performance and improve the quality of products, it is equipped with overlapping plates, the matrix being made with longitudinal and transverse slots, installed in transverse slots level with the flatness of the plate matrix, and in the longitudinal - oval cells for the powder are made and fastening tape elements are placed. JEZW'TiS ”