摘要:
The present invention relates to a method of fabricating an improved lithium silicate glass ceramic and to that material for the manufacture of blocks for dental appliances using a CAD/CAM process and hot pressing system. The lithium silicate material has a chemical composition that is different from those reported in the prior art with 1 to 10% of germanium dioxide in final composition. The softening points are close to the crystallization final temperature of 800° C. indicating that the samples will support the temperature process without shape deformation.
摘要:
An injection molding system and method of operating the system are disclosed. The system may include a hopper, a barrel configured to receive injection material from the hopper, a screw disposed within the barrel, and a mold defining a mold cavity configured to receive the injection material from the barrel. A pressure-balancing conduit may connect the mold cavity and a rear end of the barrel and be configured to allow air to flow from the mold cavity to the rear end of the barrel. A mold valve may be disposed between the pressure-balancing conduit and the mold cavity and a barrel valve may be disposed between the pressure-balancing conduit and the rear end of the barrel. The method may include opening the mold valve and injecting a material into the mold cavity from the barrel.
摘要:
An apparatus and method for creating openings in a material that solidifies is disclosed. The apparatus comprises a rigid board and at least one rigid retainer plate. The rigid retainer plate comprises at least one buoyancy plate to resist the buoyant force of the material that solidifies, at least one hydrostatic plate to resist the hydrostatic force of the material that solidifies, and a retainer tie. The rigid board further comprises retainer plate slots configured to accept the retainer plates. When the apparatus is in use, the retainer plates are inserted into the retainer plate slots and the retainer ties are coupled to formwork panels. The material that solidifies is then poured into the gap between the formwork panels. Once the material is solidified, the formwork panels are removed and the apparatus can be either reused or thrown out. The apparatus may be used with any material that solidifies.
摘要:
One exemplary embodiment of this disclosure relates to a transfer molding assembly. The assembly includes a die having a molding cavity interconnected with a reservoir. The assembly further includes a heater operable to heat the die, and a load plate configured to move under its own weight to transfer material from the reservoir into the molding cavity.
摘要:
Disclosed is a method for producing a technical glass part, particularly meeting high requirements with respect to contour accuracy and surface quality, particularly a precision lens, wherein a blank including a cast-on section is produced using an injection molding process, wherein the blank is cooled down and subsequently heated, and wherein the blank subsequently is blank molded, particularly on both sides, into a technical glass part meeting high requirements with respect to contour accuracy and surface quality, particularly a precision lens.
摘要:
A glass preparation process and its glass product, comprising the following steps: step 1: the raw materials are prepared for glass manufacturing according to the compositions contained in the said glass such as SiO2, CaO, MgO, Al2O3, Fe2O3 and Na2O; step 2: after the prepared raw materials are measured, they are put into the bulk material pipe or feed bin; step 3: put the formulated raw materials into molten pool to have them melted under the melting temperature of each glass formula and form the liquid glass with preset viscosity, then they are homogenized and clarified and discharge bubbles to form flowing molten mass; step 4: tube-drawing molding process, blowing molding process or compression molding process is selected and adopted for molding.
摘要翻译:一种玻璃制备方法及其玻璃制品,其包括以下步骤:步骤1:根据所述玻璃中所含的组分如SiO 2,CaO,MgO,Al 2 O 3,Fe 2 O 3和Na 2 O制备玻璃制造原料; 步骤2:测量准备好的原料后,将其放入散装料管或进料仓; 步骤3:将配制的原料放入熔池中,使其在每个玻璃配方的熔融温度下熔化,并形成具有预设粘度的液态玻璃,然后均化澄清并排出气泡,形成流动的熔融物质; 步骤4:选择管拉伸成型工艺,吹塑成型工艺或压缩成型工艺,用于成型。
摘要:
Methods for producing crucibles for holding molten material that contain a reduced amount of gas pockets are disclosed. The methods may involve use of molten silica that may be outgassed prior to or during formation of the crucible. Crucibles produced from such methods and ingots and wafers that are produced from crucibles with a reduced amount of gas pockets are also disclosed.
摘要:
The present invention relates to a method for the preparation of solar grade silicon comprising crystallization of large high purity silicon crystals in a hyper eutectic binary or ternary alloy containing silicon, or a refined silicon melt, wherein small silicon crystals are added to the melt and the resulting large silicon crystals are separated from the melt. The separation may be performed by centrifugation or filtration.
摘要:
Provided herein are conductive glass-metal compositions, as well as methods of making and using such compositions. In one example, the compositions include gold (Au) doped lithium-borate glasses shown to exhibit a transition from ionic to electronic conduction within the same sample. This is achieved via appropriate heat treatment, and particularly by heat treatment after annealing, wherein the post-annealing heat treatment is performed at temperatures below the glass transition temperature (Tg). The methods described herein are believed to introducing polarons formed from the trapping of electrons at partially ionized gold atoms. This unique electrical response provides new functionality to this class of nanocomposites. Additionally, increased thermal conductivity can be provided to an otherwise low conductive glass composition using the inventive methods and other subject matter provided herein.