A device for supporting stripper head on a mold box of a concrete product machine mold assembly. The device includes a set of attachment hardware that connects a stand-off leg to a stripper head plate to support the stripper head with the stripper head plungers disposed in respective protected positions within respective plunger receptacles of the mold box. The hardware set comprises a ferrous metal portion configured to be carried by the stripper head plate and a magnetic portion carried by the stand-off leg in a position to magnetically engage the ferrous metal portion and allow for removable attachment of the stand-off leg to the stripper head plate when the ferrous metal portion is carried by the stripper head plate.

A method includes a slurry preparing process of preparing a ceramic powder slurry, an impregnating process of impregnating the slurry into an inorganic fiber sheet to form an impregnated sheet, a sheet winding process of winding an impregnated sheet around a core to form a sheet-wound core, a pressing process of disposing the impregnated sheet between a first mold and a second mold opposed to each other and interposing a spacer therebetween at a portion where the impregnated sheet is not positioned, and then clamping the first mold and the second mold with a first fastener to come close in a direction facing each other, thereby applying pressure to the impregnated sheet, a drying process of heating and drying the impregnated sheet, and a firing process of firing the sheet after drying.

A multicolor light-storing ceramic for fire-protection indication and a preparation method thereof are provided. The preparation method includes: adding a glass based raw material, a light-storing powder, a dispersant and an alumina powder into a granulator, adding water mixed with a pore-forming agent and then mechanically stirring for granulation; adding a plasticizer after the stirring of 4?8 h, and continuing the stirring for 1?3 h to thereby obtain a mixture; packing the mixture into a mold and performing tableting; demolding and obtaining a light-storing self-luminous quartz ceramic by drying and firing using a kiln; printing a pattern onto a surface of the ceramic and then curing to obtain a light-storing ceramic for indication sign. Using an industrial waste glass has advantages of low sintering temperature and green environmental protection; dispersed pores and alumina introduced as scattering sources improves light absorption efficiency, fluorescence output phase ratio and light transmission of the ceramic.

A powder compaction mold includes a die and upper and lower punches configured to fit into the die and is configured to compress a powder between the upper and lower punches to manufacture a powder compact. Of the members forming the powder compaction mold, at least one of two members in sliding contact with each other has therein a vent passage through which gas is vented from a filling space for the powder surrounded by the die and the lower punch to an outside of the powder compaction mold. The vent passage has a gas intake port that is open to a clearance section formed between the two members and connecting to the filling space.

In a device for producing concrete slabs, a mold lower part is inserted into a frame secured via retaining braces to receiving areas of guiding columns oriented along an insertion direction and having, above the mold lower part, a structural loading device movable along the guiding columns and having, on the side facing the mold lower part, a mold upper part with one or more pressure plates inserted or insertable into one or more recesses of the mold lower part, the structural loading device being connected to the pressure plates via pressure rams. An upper guide element arranged between the structural loading device and the pressure rams interacts with a lower guide element arranged on the retaining brace such that, during the production of concrete slabs, the structural loading device is constantly guided relative to the mold lower part on a plane perpendicular to the insertion direction.

A hot press apparatus includes a mold including: a cylindrical die, a cylindrical outer sleeve provided inside the die, and a cylindrical inner sleeve provided inside the outer sleeve; and a pair of pressing punches for pressing a sample filled into the mold. The inner sleeve has lower rigidity than the outer sleeve and is provided with a graphite sheet member including graphite on the inner side of the mold. The hardness of the outer sleeve is preferably 30 HSD or greater.

There is provided a method for controlling a powder compacting apparatus including: a die having a hollow; an upper punch and a floating lower punch; a first actuator that pushes down the upper punch; a second actuator that controls a floating load of the floating lower punch; and a stopper that defines a pressurization stop position of the floating lower punch. The powder compacting apparatus is configured such that the first actuator is operated to push down the upper punch to pressurize powder charged into the cavity, and the second actuator is controlled to pressurize the powder such that a load acting on the powder during pressurization becomes a prescribed floating load required to compact the powder. The method includes reducing the floating load in a stepwise manner after completion of the pressurization.

There is provided a method for controlling a powder compacting apparatus including: a die having a hollow; an upper punch and a floating lower punch; a first actuator that pushes down the upper punch; a second actuator that controls a floating load of the floating lower punch; and a stopper that defines a pressurization stop position of the floating lower punch. The powder compacting apparatus is configured such that the first actuator is operated to push down the upper punch to pressurize powder charged into the cavity, and the second actuator is controlled to pressurize the powder such that a load acting on the powder during pressurization becomes a prescribed floating load required to compact the powder. The method includes reducing the floating load in a stepwise manner after completion of the pressurization.

The invention relates to a press for producing dimensionally stable preforms from material that is substantially in the form of a powder, in particular iron powder and or ceramic powder, with a tool comprising an upper die and a lower die, wherein the upper die and the lower die respectively comprise at least one die, wherein a first die and a second die are arranged together, one sliding in the other, as the upper die or lower die and respectively have a first end and a second end, lying opposite the first end, wherein at least one of the two dies spreads out along one portion to such an extent that the second end thereof has a width that at least approaches an outer diameter of a die holder associated with the second end. This allows presses of a compact form to be made available for producing dimensionally stable preforms of high quality and great complexity.

A pressing device configured to press a workpiece includes a first die, a second die that moves relative to the first die, and a piston that moves the second die. The piston includes an annular pressing surface that pushes the second die.