A die device for molding a plurality of semiconductor chips is provided. The die device includes a lower die including a moving plate that has a plurality of V-groove structures for suctioning a release film coated with a resin, and an upper die which descends to the lower die or ascends from the lower die, thereby closing/opening the dies. The upper die includes at least a plurality of suction vent units for suctioning a substrate on which the semiconductor chips are arranged, and the lower die includes a device for manually adjusting the tension of a spring that supports the moving plate.

A PVB film for HUD, a forming mold and a forming method thereof are presented. The accuracy error of HUD imaging achieved by the PVB film for HUD is 0.1 mrad. The forming mold includes an upper mold and a lower mold, the two of which can form an enclosed mold cavity when clamped together, wherein protective films are disposed on inner surfaces of the upper mold and the lower mold, respectively, for supporting PVB material and preventing the PVB material from bonding with the upper mold and the lower mold, and wherein shapes of the protective films match shapes of the upper mold and the lower mold.

A PVB film for HUD, a forming mold and a forming method thereof are presented. The accuracy error of HUD imaging achieved by the PVB film for HUD is 0.1 mrad. The forming mold includes an upper mold and a lower mold, the two of which can form an enclosed mold cavity when clamped together, wherein protective films are disposed on inner surfaces of the upper mold and the lower mold, respectively, for supporting PVB material and preventing the PVB material from bonding with the upper mold and the lower mold, and wherein shapes of the protective films match shapes of the upper mold and the lower mold.

A method for preparation of a mold (10) intended to form a slab from a mixture of agglomerate comprising the steps of depositing over the mold surfaces a sheet (15) of PVA-based plastic material so as to form with it a surface for subsequent contact with the mixture introduced into the mold for forming the slab, whereby in at least some areas a layer (14) of a fluid agent containing PVA in a solution is interposed between the sheet (15) and the mold surfaces. A plant for carrying out the method and a method for production of a slab are also described.

A method for preparation of a mold (10) intended to form a slab from a mixture of agglomerate comprising the steps of depositing over the mold surfaces a sheet (15) of PVA-based plastic material so as to form with it a surface for subsequent contact with the mixture introduced into the mold for forming the slab, whereby in at least some areas a layer (14) of a fluid agent containing PVA in a solution is interposed between the sheet (15) and the mold surfaces. A plant for carrying out the method and a method for production of a slab are also described.

An example method for forming a flat composite charge into a composite blade stiffener includes cutting a flat composite charge along a cut line into a first piece and a second piece having an angle, positioning the first piece and the second piece of the flat composite charge on a forming mandrel about a tooling plunger, activating the tooling plunger to drive the first piece and the second piece into a cavity of the forming mandrel resulting in the first piece and the second piece folding at the cut line, withdrawing the tooling plunger from the cavity of the forming mandrel, compressing the forming mandrel to apply a lateral pressure to the first piece and the second piece folded into the cavity, and applying a vertical pressure to a first flange and a second flange of the first piece and the second piece, respectively, to form the composite blade stiffener.

An example method for forming a flat composite charge into a composite blade stiffener includes cutting a flat composite charge along a cut line into a first piece and a second piece having an angle, positioning the first piece and the second piece of the flat composite charge on a forming mandrel about a tooling plunger, activating the tooling plunger to drive the first piece and the second piece into a cavity of the forming mandrel resulting in the first piece and the second piece folding at the cut line, withdrawing the tooling plunger from the cavity of the forming mandrel, compressing the forming mandrel to apply a lateral pressure to the first piece and the second piece folded into the cavity, and applying a vertical pressure to a first flange and a second flange of the first piece and the second piece, respectively, to form the composite blade stiffener.

A release film satisfies formulas (I) and (II) when S1 (%) represents the maximum dimensional change rate between 30 C. and 150 C. when the temperature is raised from 30 C. to 200 C. at a rate of 10 C./min, T1 ( C.) represents the temperature at which S1 is obtained, and S0 (%) represents the dimensional change rate at 40 C. The surfaces may have a surface free energy Sa (mN/mm) at 25 C., surface free energy Sb (mN/mm) after having been subjected to a heat treatment at 180 C. for 3 minutes, and surface free energy Sc (mN/mm) after having been stretched by 50% at 180 C. that satisfy formulas (III) and (IV).

0S11.5Formula (I):

0|S1S0|/(T140)0.050Formula (II):

0|SaSb|15Formula (III):

0|SaSc|15Formula (IV):

A release film satisfies formulas (I) and (II) when S1 (%) represents the maximum dimensional change rate between 30 C. and 150 C. when the temperature is raised from 30 C. to 200 C. at a rate of 10 C./min, T1 ( C.) represents the temperature at which S1 is obtained, and S0 (%) represents the dimensional change rate at 40 C. The surfaces may have a surface free energy Sa (mN/mm) at 25 C., surface free energy Sb (mN/mm) after having been subjected to a heat treatment at 180 C. for 3 minutes, and surface free energy Sc (mN/mm) after having been stretched by 50% at 180 C. that satisfy formulas (III) and (IV).

0S11.5Formula (I):

0|S1S0|/(T140)0.050Formula (II):

0|SaSb|15Formula (III):

0|SaSc|15Formula (IV):

The present invention relates to a (meth)acrylic mixture for impregnating a fibrous substrate, characterized in that it comprises: a) a first dispersion comprising at least one (meth)acrylic polymer obtained by emulsion polymerization of one or more (meth)acrylic monomers, b) a second dispersion comprising at least one flame retardant. The invention also relates to a method for impregnating a fibrous substrate with a (meth)acrylic mixture of this kind, and to a method for manufacturing mechanical parts or structured elements, or articles, from the (meth)acrylic mixture. Another objective of the invention is a mechanical part or a structured element or an article made of composite material, obtained by the implementation of the manufacturing method.