141results about How to "Reduce flash" patented technology

The present invention relates to a silencer for reducing muzzle blast and noise of firearms or similar devices. The present silencer has a hollow cylindrical or other shape casing comprising front and rear end caps and an opening aligned along a longitudinal axis defining a passage for a projectile and propellant gases to emerge from the muzzle opening. A plurality of serially placed baffles of symmetrical or slanted orientation and intervening coaxial spacers are positioned within the casing and define a multitude of chambers among the baffles, spacers, and outer housing. The baffles shear propellant gases away from the projectile path and through openings or ports into additional chambers formed between the spacers and outer housing. The arrangement of baffles and spacers provides flow-impeding paths, dispersion, and controlled expansion of gases and lowers gas temperature to reduce audible noise and observable signature of the muzzle blast.

A suppressor for rapid fire weapons designed to rapidly bleed down the weapon pressure and thereby minimizing gas blowback to the operator and to the weapon's gas operating system; while also creating a shear gas flow about the exiting bullet's gas flow to mask the flash thereof. The suppressor is configured within a generally cylindrical housing, having: (1) a central core of unported K-baffles located about a central bulletway; (2) a bypass located between the cylindrical housing and the unported K-baffled central core—providing a generally forward subsonic high gas flow area to an endcap closing the cylindrical housing; (3) said endcap having a series of vent ports for the bypass, which also create a shear flow about the centrally exiting bullet; and (4) wherein the series of unported K-baffles are spaced away from the weapon's bore end to allow the propellant gasses to expand into the bypass.

The invention relates to multifunctional protective composite coating material, which is recombined with one layer or multilayer specific functional coating. Corrosion transformation, thermal obstructing, thermal reflecting and thermal emitting are reduced through conducting the rust protection processing for metal base plate. The coating material has the advantages of high reflectance for visible sunlight and near-infrared sunlight, strong radiation ratio in 8-13.5 mu m bands, low thermal conductivity coefficient, excellent temperature reduction effect in summers, thermal radiation property approximately to background in visible lights and infrared bands, excellent concealment effect and favorable corrosion property and the like.

A hybrid wax compositions that are suitable for use in manufacturing wax articles (e.g., candles) by compression molding. The combination of a hydrogenated natural oil-based wax and a paraffin wax having a select distribution of hydrocarbon chain lengths provides the hybrid wax compositions with improved properties, such as improved compressive strength and improved de-molding characteristics, for example, as evidenced by reducing scarring and/or flashing. The hybrid wax compositions comprise: (a) a wax comprising a hydrogenated natural oil; and (b) a paraffin wax, wherein the paraffin wax comprises less than about 50% by weight of the hybrid wax composition, and wherein about 52% or greater of hydrocarbons in the paraffin wax have carbon chain lengths ranging from C25 to C29.

The invention belongs to the technical field of ceramic material preparation and discloses an adhesive agent for injection molding of aluminum nitride ceramic and an application method of the adhesive agent. The adhesive agent comprises the following ingredients: 50-70% of microcrystalline wax, 25-40% of high polymer, 3-10% of surface modifier and 2-12% of resin. The application method of the adhesive agent comprises the following steps of mixing aluminum nitride powder and the adhesive agent, putting in a mixing mill for heating and mixing to prepare a feed, carrying out the injection molding to prepare a green body, preparing a degreased blank after degreasing, carrying out high-temperature sintering at last to form a finish product. In a sintering process, heat preservation is carried out at a specific temperature point to achieve carbon thermal reduction to further reduce an oxygen content, and then the temperature is raised to the maximum temperature for sintering and compacting. The adhesive agent has excellent liquidity and shape preserving property, and a specific carbon residue rate after thermal degreasing, and the aluminum nitride ceramic prepared by the adhesive agent has upper heat conductivity.

The invention discloses a quad flat non-lead (QFN) package with high density and a manufacturing method. The package comprises a lead frame 201, metal material layers 25, an IC chip 27, insulating filling materials 23, bonding materials 26, metal conductors 28 and plastic package materials 29, wherein the lead frame comprises a chip carrier 202 and a plurality of leads 203 arranged in multiple circles around the chip carrier; the metal material layers are arranged on the upper and lower surfaces of the lead frame; the IC chip is arranged on a metal material layer on the upper surface of the lead frame; the insulating filling materials are arranged below stepped structures 22b of the lead frame; the bonding materials are arranged between the IC chip and the metal material layer on the upper surface of the lead frame; the IC chip is connected to the inner leads of the multiple circles of leads and the upper surface of the chip carrier respectively by the metal conductors; the plastic package materials wrap and seal the IC chip, the bonding materials, the metal conductors, partial regions of the lead frame and partial metal material layers; and the chip carrier and the outer leads exposed out of the bottom surface of a package structure, are provided with raised parts. The package and the manufacturing method have the following beneficial effects: the bottleneck of low I/O quantity is broken through and the package reliability is improved.

A suppressor and flash hider device for firearms defines primary and secondary propellant gas paths that function simultaneously to quickly decrease gas pressure within the tubular housing of the suppressor to minimize blow-back toward the firearm user. The tubular housing has a collet-like firearm clamping system that establishes symmetrical clamping that will not tend to force the suppressor off coaxial alignment with the firearm barrel to which is mounted. A front wall mounted to the housing defines a central projectile port through which propellant gas also passes and defines an array of angularly oriented discharge passages for discharging propellant gases from the secondary propellant gas path forwardly and angularly toward gas being discharged from the projectile port of the front wall.

The invention provides a vertical type forging technology method for an automobile steering yoke. The automobile steering yoke consists of a rod part, a ring flange, and fork ears symmetrically arranged on the ring flange form a whole. The vertical type forging technology method is characterized by comprising: a. a step of vertically parting die from the ring flange of the automobile steering yoke and the yoke ears at the two sides, making the die parting surface of the vertical die parting perpendicular to the rod part, and supplementing materials into the inner part of the yoke ears of the automobile steering yoke to form a draft angle; and b. a step of performing vertical forging and forming on a forging machine, and directly forging and forming the bottom of the inner part of the fork ears. Because the die parting form is changed, the material feeding is performed on the processing position of a part, the preforming process is optimized, and the vertical forging is realized; and the die parting area is reduced, the casting fins are reduced, the utilization rate of the materials is increased by more than 20 percent, the secondary preforming step in the horizontal forging process is avoided, the forging efficiency is improved, and the production cost is lowered. The bottom of the inner part of the yoke ears is directly formed by forging so as to remove the admittance at the bottom of the inner part.

A bulked continuous filament with a three-sided exterior configuration is characterized in that each side has a smoothly curved contour extending between a first and a second rounded tip with an inwardly extending depressed region being disposed adjacent to each tip. Generally, the filament has an exterior modification ratio in the range from about 1.4 to about 2.5, and a tip ratio in the range from about 2.0 to about 10.0. The filament generally delta-shaped void with three major apices extending centrally and axially therethrough. Each side of the void is convexly shaped and formed from a pair of facets that meet to define minor apices. The void is oriented such that each major apex extends toward the approximate midpoint of one side of the exterior of the filament and each minor apex extends toward a tip of an exterior side. The distance (R_M) from the geometric center of the void to each major apex and the distance (R_m) from the geometric center of the void to each minor apex defines an apex ratio (R_M/R_m) in the range from about 1.0 to about 1.55. The void occupies from about one percent (1%) to about twenty-five percent (25%) of the cross sectional area of the filament.

The invention discloses an isothermal forging die and a forging technology thereof of a magnesium alloy die forge piece of step type structure. An upper die (3) and a lower die (4) are both of semi-closed structures, and in other words, the upper die (3) and the lower die (4) are both of open structures along the length direction, and of closed structures along the width direction due to flash gutters designed on the width direction of the upper die (3) and the lower die (4). One side face along the width direction of the upper die (3) and one side face along the width direction of the lower die (4) are vertical to each other, and the upper die (3) is in clearance fit with the lower die (4) on the position where the upper die (3) and the lower die (4) vertically intersect so as to form a closed cavity. The isothermal forging die and the forging technology thereof of the magnesium alloy die forge piece of step type structure can effectively reduce forging deformation resistance, enable a forging stock to obtain good plasticity, and are high in isothermal forging production efficiency.

A process for preparing the plastic filter plate or plastic plate features that its mould is controlled by hydraulic press, its heat channel is positioned at the bottom of lower mould and communicated with said lower mould, and the plasticized plastics is injected in said mould via heat channel.

A continuous blow molding machine includes a mechanism for shifting molds upstream during closing to reduce between-mold flash.

Disclosed herein is an antiglare glass sheet article for display devices in which at least one main surface of the glass sheet is roughened. The article has a roughened surface that includes: a surface with continuous irregularities having an arithmetic average roughness (Ra) of 0.01 to 0.1 μm, and an average interval (RSm) of 1 to 20 μm; and depressions dispersed over the surface and each having a circular entrance portion measuring 3 to 20 μm in diameter, and a depth of 0.2 to 1.5 μm from the entrance portion, the roughened surface having 60 to 600 of the depressions in an observed 250 μm ×250 μm region. The article has desirable antiglare properties with reduced sparkling.

Method and apparatus for applying a force to a portion of a surface of a mold component are provided. An injection mold has a core insert, a side acting core insert, and a piezoceramic actuator. The amount of force needed for sealing a surface of said side acting core insert to a portion of a surface of said core insert is determined, and a piezoceramic actuator is actuated so as to supply the force to seal the side acting core insert against the core insert during a molding operation. A piezo-ceramic sensor may be provided to sense a force between the side acting core insert and the core insert, and to generate corresponding sense signals. Wiring structure is coupled to the piezo-ceramic sensor and is configured to carry the sense signals.

The shelf as defined by a shelf grating formed of a plurality of first and second groups of wires disposed normal to each other and having ends thereof encapsulated by an injection molded, continuous open encapsulation, rim or border. Preferably, each of four border portions of the border each encapsulate substantially the entirety of one of the wires of the two groups to afford rigidity to the wire shelf. The border includes a Class “A” upper surface between peripheral outboard and inboard parting lines or lines of flash which provides a high degree of aesthetics to the shelf when viewed from above.

The invention discloses a forging forming method of a triangular aluminum alloy control arm and aims at solving the problems in the prior art of low quality of a product, low material utilization ratio and low production efficiency. The forging forming method comprises the following steps: 1, blanking; 2, heating a blank: heating the blank in the first step in an electric induction heating furnace at the heating temperature of 420-480 DEG C, keeping the temperature for 5-8min to enable the blank to be uniformly heated, and finishing dynamic recrystallization after finishing forging to obtain uniform microstructures; 3, roll forgingforming: 1) calculating a roll forging pass n; 2) roll forging forming: comprising the following steps: from (1) first-pass roll forgingforming to (4) fourth-pass roll forging forming; 4, mis-shifted forming; 5, flattening forming; 6, pre-forging forming; 7, finish forging forming: carrying out finish forging forming on the basis of pre-forging forming, designing a die according to a hot forging drawing during finish forging forming, putting a pre-forging into a mold cavity of the finish forging die, and then obtaining a part in finish forging forming under the action of a press; and 8, shaping the forging.

A method for reducing sparkle artifacts in a liquid crystal imager, comprises the steps of: low pass filtering only a first lower brightness level signal component of a video signal; and, slew rate limiting only a second lower brightness level signal component of the video signal having the low pass filtered signal component, the video signal having the low pass filtered and the slew rate limited signal components being less likely to result in sparkle artifacts in the imager. Brightness thresholds for defining the lower brightness level signal components and slew rate limits can be selected in accordance with transitions between lower and higher level gain portions of a gamma table associated with the imager, for example an LCOS imager.

The invention relates to the technical field of copper rod processing, specifically to a milling machine capable of scoring. The milling machine comprises a mill and a scoring mechanism, wherein the scoring mechanism comprises four cutter blades and a cutter blade drive mechanism for driving the cutter blades to score scores on four edges of a copper rod billet. The copper rod manufacturing method comprises: 1, adopting a continuous casting process to produce a copper rod billet with a rectangular cross-section; 1.1, scoring scores circumferential extending and circumferential distributing along the copper rod billet circumference on four edges of the copper rod billet; 1.2, milling off the copper rod billet surface and the four edges of the copper rod billet to form chamfers, wherein swarfs break from the scoring position during the chamfer forming process through milling the edges of the copper rod billet so as to fall down; and 2, adopting a continuous rolling process to produce the semi-finished product copper rod with a round cross-section. A purpose of the present invention is to provide a copper rod manufacturing method and a milling machine capable of scoring, wherein the produced copper rod has characteristics of good circumferential extension uniformity and less surface defect proportion, such that the problems of high surface defect proportion and high circumferential extension difference of the existing copper rod can be solved.