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A platform for research: civil engineering, architecture and urbanism
JIG AND MOLDING TOOL
PROBLEM TO BE SOLVED: To suppress more surely, occurrence of defects of an outer die used for a hot press furnace.SOLUTION: A molding tool 20 comprises a relaxation member 24 (jig). The relaxation member 24 is configured to absorb; by the deformation amount ▵Lin the radial direction of the relaxation member 24 at equal or lower than a breakage strength Pof the outer die 29; a stress generated on an outer die 29 by expansion of a burning target 11, which is a difference value ▵R between an outer diameter (radius) Rof the burning target after burning and cooling, and an inner diameter R; where said Ris obtained by considering burning shrinkage determined by temperature difference ▵Tobtained by cooling from burning temperature T, and a thermal expansion ratio αof the burning target 11, with respect to the outer diameter of the burning target during burning time determined based on a larger one of a thermal expansion ratio αof the outer die 29 and a thermal expansion ratio αof the relaxation member 24, the temperature difference ▵Tbetween initial temperature and burning temperature T, a press pressure P, a deformation amount ▵Lin a radial direction at the press pressure Pof the relaxation member 24 at the burning temperature T, and an inner diameter (radius) Rof the relaxation member 24 before burning.SELECTED DRAWING: Figure 1
【課題】ホットプレス炉に用いられる外型の不具合の発生をより抑制する。【解決手段】成形型２０は、緩和部材２４（治具）を備えている。緩和部材２４は、外型２９の熱膨張率αB及び緩和部材２４の熱膨張率αCのうち大きい方と、初期から焼成温度Ｔまでの温度差△ＴFと、プレス圧ＰPと、緩和部材２４の焼成温度Ｔにおけるプレス圧ＰPでの径方向の変形量△ＬPと、焼成前の緩和部材２４の内径（半径）ＲCとに基づいて求められた焼成時の焼成対象物の外径に対し、焼成対象物１１の熱膨張率αA及び焼成温度Ｔから冷却した温度差△ＴCにより求めた焼成収縮を加味して求められた焼成冷却後の焼成対象物の外径（半径）ＲAと、内径ＲCとの差分値△Ｒである焼成対象物１１の膨張によって外型２９に生じる応力を、外型２９の破壊強度ＰB以下での緩和部材２４の径方向の変形量△ＬCで吸収する。【選択図】図１
JIG AND MOLDING TOOL
PROBLEM TO BE SOLVED: To suppress more surely, occurrence of defects of an outer die used for a hot press furnace.SOLUTION: A molding tool 20 comprises a relaxation member 24 (jig). The relaxation member 24 is configured to absorb; by the deformation amount ▵Lin the radial direction of the relaxation member 24 at equal or lower than a breakage strength Pof the outer die 29; a stress generated on an outer die 29 by expansion of a burning target 11, which is a difference value ▵R between an outer diameter (radius) Rof the burning target after burning and cooling, and an inner diameter R; where said Ris obtained by considering burning shrinkage determined by temperature difference ▵Tobtained by cooling from burning temperature T, and a thermal expansion ratio αof the burning target 11, with respect to the outer diameter of the burning target during burning time determined based on a larger one of a thermal expansion ratio αof the outer die 29 and a thermal expansion ratio αof the relaxation member 24, the temperature difference ▵Tbetween initial temperature and burning temperature T, a press pressure P, a deformation amount ▵Lin a radial direction at the press pressure Pof the relaxation member 24 at the burning temperature T, and an inner diameter (radius) Rof the relaxation member 24 before burning.SELECTED DRAWING: Figure 1
【課題】ホットプレス炉に用いられる外型の不具合の発生をより抑制する。【解決手段】成形型２０は、緩和部材２４（治具）を備えている。緩和部材２４は、外型２９の熱膨張率αB及び緩和部材２４の熱膨張率αCのうち大きい方と、初期から焼成温度Ｔまでの温度差△ＴFと、プレス圧ＰPと、緩和部材２４の焼成温度Ｔにおけるプレス圧ＰPでの径方向の変形量△ＬPと、焼成前の緩和部材２４の内径（半径）ＲCとに基づいて求められた焼成時の焼成対象物の外径に対し、焼成対象物１１の熱膨張率αA及び焼成温度Ｔから冷却した温度差△ＴCにより求めた焼成収縮を加味して求められた焼成冷却後の焼成対象物の外径（半径）ＲAと、内径ＲCとの差分値△Ｒである焼成対象物１１の膨張によって外型２９に生じる応力を、外型２９の破壊強度ＰB以下での緩和部材２４の径方向の変形量△ＬCで吸収する。【選択図】図１
JIG AND MOLDING TOOL
治具及び成形型
ISODA YOSHINORI (author) / INOUE KATSUHIRO (author) / SUZUKI YOSHIO (author)
2016-09-23
Patent
Electronic Resource
Japanese
IPC:
B28B
Formgeben von Ton oder anderen keramischen Stoffzusammensetzungen, Schlacke oder von Mischungen, die zementartiges Material enthalten, z.B. Putzmörtel
,
SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
/
B22F
Verarbeiten von Metallpulver
,
WORKING METALLIC POWDER
/
B30B
PRESSES IN GENERAL
,
Pressen allgemein
/
C04B
Kalk
,
LIME
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