2599 results about "Metal mold" patented technology

A compound mold or tooling system is designed to provide an alternative to conventional, expensive, metal molds for various plastics molding applications. The compound mold comprises a replaceable thin-walled liner, or skin-mold, defining the mold surface, temporarily bonded by vacuum means or mechanical means to a conforming backing-mold mold body supported by a rigid backing-plate. Both skin- and backing-molds are composed of suitable polymers with or without additives, fillers, reinforcements or other inclusions depending on mold requirements. The backing-plate contains standard features and fixtures common to all molds used in the particular process or of a particular geometry.

The invention discloses a steel plate for stamping and quenching and a thermoforming method of the steel plate. The steel plate comprises the following chemical components in percentage by weight: 0.14-0.28% of C, less than 0.40% of Si, 0.4-2.0% of Mn, less than or equal to 0.010% of P, less than or equal to 0.004% of S, 0.016-0.040% of Al, 0.15-0.8% of Cr, 0.015-0.12% of Ti, 0.0001-0.005% of B, less than or equal to 0.005% of N, and the balance of Fe and inevitable impurities. The thermoforming method comprises the following steps: blanking by shearing the steel plate, and heating at Ac3 to (Ac3+80) DEG C to carry out austenization; after insulating for 5-10 minutes in the heating furnace, immediately transferring the steel plate to a metal mold the inside of which is cooled by introducing water, and stamping at the high temperature of 650-850 DEG C; cooling the formed workpiece in the closed mold, and cooling the mold by water circulation in the mold, wherein the cooling rate is greater than the critical cooling rate when austenite forms martensite, and the temperature of the workpiece leaving the hot stamping production line is below 150 DEG C; and carrying out air-cooling to room temperature. The steel plate has the advantages of simple component system and favorable hardenability; and the substrate tissues, which are ferrite and pearlite, are processed by hot stamping andquenching to obtain the all martensitic structure. The tensile strength of the steel plate can be higher than 1300 N/mm<2>.

A method of manufacturing a protruding-volute contact for attaining electrical continuity with an electrode of electronic equipment or inspection equipment, the method comprising the steps of forming a plastic mold (resist structure) with a metal mold; forming a layer consisting of metallic material on the plastic mold (resist structure) by means of electroforming; and performing convex formation of a metal microstructure made from the layer consisting of metallic material so as to form a spiral spring that protrudes volutedly outward. With such method, an inspection contact or coupling contact having high reliability and capable of attaining electrical continuity of large electric current can be produced at low cost.

The invention relates to a production method for a sand-lined metal mold casting cylinder body. In the method, the inner cavity of a metal mold is formed in a mold-following mode according to the shape of the cylinder body, the thickness of a mold-following sand-lined layer is 10 to 30mm, and a closed pouring gate is used; vent wires are arranged in a jet hole on the highest part and a core head part of an upper half mold, and gas exhaust slots are formed on a mold separating plane of the metal mold; heating devices are arranged in the middles of the lower mold base plate and the upper mold base plate of an outer mold, and sand is jetted after the temperature meets a requirement; and a sand core is made and loaded, a box is closed, pouring is performed, and the box is opened. By the method, yield is increased from 69 percent in the conventional sand mold casting to over 83.75 percent in metal mold casting, the defects of subsurface pinholes, a loose structure and the like are substantially overcome, the problem that the cylinder body leaks when working under pressure is solved, the overall mechanical performance is improved, sand treatment equipment, fields and a sand using quantity are reduced, and the severe environment of casting is improved. The production method is easy to control, the process flow is simple, and the production cost of the production method is 30 to 50 percent lower than that of a sand mold casting method.

A developing device frame unit supporting a regulating member regulating the layer thickness of developer on a developer carrier. The unit includes a frame having a seal forming portion, first and second end seals contactable to the carrier surface to prevent carrier-axial-direction leaking of the developer, and a blade sealer sealing between the regulating member and the frame to prevent developer leaking when the regulating member is mounted. The blade sealer is an elastomer resin material which is injection-molded with a metal mold and in the seal forming portion where the end seals are provided. The blade sealer connects the end seals with each other, and a protrusion provided by a squeezed-out portion of the resin material is provided by injecting, into a space defined by the metal mold, the seal forming portion, and the end seals, a resin material volume larger than a volume of the space.

A polycarbonate resin composition comprising 100 parts by weight of a polycarbonate resin (component A), 0.01 to 10 parts by weight of at least one ultraviolet light absorber (component B) selected from the group of a specific cyclic imino ester, and 0.01 to 1 part by weight of a fatty acid ester compound (component C) which is an ester of a polyhydric alcohol and an aliphatic carboxylic acid and has a molecular weight of 500 to 2,000 g/mol, as well as molded articles thereof. The polycarbonate resin composition provides molded articles having excellent transparency, color and resistance to ultraviolet radiation, is excellent in heat stability at the time of molding and releasability and fully suppresses the production of a deposit on a metal mold.

A braided rotor blade spar includes a tri-axle braid in which braided bias angled fibers are located non-parallel to a longitudinal axis of the spar. Zero degree fibers are located parallel to the axis and are positioned to be on the upper and lower surfaces of the spar. The bias angle fibers are braided around the zero degree fibers. In a method of manufacture of the braided spar, a braided sleeve is formed dry over a mandrel by a multi-axial braiding machine. Once the braided sleeve is formed upon the mandrel, the mandrel is located within a matched metal mold, resin impregnated, and cured. The mandrel is then removed from the finished braided spar.

A cartridge detachably mountable to a main assembly of an image forming apparatus includes a cartridge frame formed of a resin material; a plurality of resin members molded on the cartridge frame by injection molding of a resin material different from that of the cartridge frame; a plurality of contact surfaces, provided on the cartridge frame, to which metal molds corresponding to the resin members are to be contacted from the same side when the resin members are molded; and a plurality of resin material inlet ports, provided in an opposite side of said cartridge frame from a side where the contact surfaces are provided. The resin material has been flowed into the cartridge frame when the resin members are molded.

A soft magnetic material has an iron based powder that has an insulating coating on the surface and an ester wax. The ester wax is added in an amount not less than 0.02% by weight and not more than 0.6% by weight in relation to the soft magnetic material. Consequently, seizure between a metal mold and a material to be molded at the time of molding can be suppressed and the arising of a black residue can be prevented.

The invention discloses a method for evaporative pattern precise composite casting. The method comprises the following steps: making a mould by polystyrene foam to form a casting system; coating a surface modifying agent on the surface of the mould; preparing a mould shell including a surface layer mould shell, a transitional layer mould shell and a back layer mould shell; taking the mould out after placing the mould in a pre-wetting agent for 2 to 3s, dipping the mould in a container filled with surface layer coating, turning the mould so as to evenly coat the mould, sprinkling zircon sand on the mould, and drying the mould for 4 to 6h to prepare a surface layer mould shell; dip-coating the surface layer mould shell by a transitional layer coating, sprinkling and drying the sand for 8 to 12h; preparing the transitional layer mould shell and the back layer mould shell by the similar method; sealing pulp by the back layer coating, and drying for 14 to 18h; roasting the mould at a temperature of between 950 and 1,050 DEG C, and keeping warm for 30 to 60min; and pouring the molten metal in the mould shell to form a casting. The method has the advantages of preparing the metallic mould without the conventional precise casting, saving processing time, lowering cost and simultaneously ensuring the product quality.

A metal mold for use in a nano-imprinting process comprises a firmly adhering monomolecular non-sticking layer. The layer was obtained by subjecting the mold to a reaction with a fluoroalkyl compound having a mercapto group. As a result of said reaction, the layer comprises an organic sulfide of said metal.

The invention discloses a method for manufacturing metal molds used for casting manganese steel crushing walls or rolling motor walls of cone crushers. The method is characterized by comprising the following steps of: (1) manufacturing cast molds according to different sizes, specifications and models of the manganese steel crushing walls or the rolling motor walls of the cone crushers; (2) respectively designing and manufacturing near inner metal molds and near outer metal molds which have corresponding thicknesses and overall structures according to the shapes of the cast molds; and (3) distributing trumpet-shaped vent holes on the near inner metal molds and the near outer metal molds. Castings produced by using the method do not produce fragmentation; the metal molds can accelerate the cooling speed of the castings so that the surfaces of the castings have fine grain structures; and the mold cavities have the characteristics of high size precision, bright and clean surface and no distortion.

The invention provides a wide temperature domain damping polyurethane micropore elastomer material and a preparation method thereof; the formulation comprises 20 percent to 55 percent of polylol I, 5 percent to 38 percent of polylol II, 32 percent to 44 percent of isocyanate, 3.0 percent to 12.0 percent of chain extender, 0.10 percent to 0.30 percent of composite catalyst and 0.1 percent to 0.5 percent of foaming agent. The preparation method comprises the following steps: the polylol I and the polylol II are evenly mixed; the chain extender, the composite catalyst and foaming agent and other additives are added; the inner wall of a metal mold is coated with a releasing agent, heating and drying are carried out; and the mixture is added with isocyanate, is stirred with strong force, and the obtained mixture is cast into the mold, sealed, cured, cooled and demoulded so as to obtain the polyurethane micropore elastomer material. The invention adopts two types of polylol with large distance of molecular weight as polyurethane soft segment, leads the material to have excellent damping performance in the temperature range of -20 DEG C to 50 DEG C and can meet the use requirements under normal temperature condition.

A safety razor with a plurality of blades comprising a head provided with a plurality of vertically adjacent blades, which do not wholly overlap one another, and blade support parts supporting the respective blades apart from one another in order to retain the respective blades at spaces, and wherein non-overlapping portions, which do not overlap one another, are formed on supported portions of the respective blades and the blade support parts are held to the non-overlapping portions of the blades to support the blades. A support structure can be divided into two members to be manufactured and mechanically assembled, metal molds are not so much complicated, and mechanical assembly of blades is made possible to prevent degradation in yield.

The invention relates to a method for preparing in-situ particle reinforced magnesia-based composite materials, which particularly comprises the following steps: magnesium aluminum alloy raw materials are completely smelt under the protective condition of gas mixture of SF6 and CO2; aluminum-silicon intermediate alloy is pressed into a magnesium aluminum fused mass, and the temperature is raised and maintained, so as to guarantee complete reaction between silicon and magnesium in the magnesium aluminum alloy fused mass, and simultaneously an ultrasonic probe is inserted into the fused mass for treatment; and after the treatment is finished, surface scum is removed and the fused mass is cast into a metal die, and the in-situ Mg2Si particle reinforced magnesia-based composite materials are obtained. The method has the characteristics of good interference compatibility of Mg2Si particles and substrates, controllable particle size of reinforced phases, uniform distribution of the reinforced phase and so on; and the magnesia-based composite materials prepared have good mechanical property.

The method of producing a semiconductor device in which chips are resin-molded, including steps of: preparing frames having front and back surfaces and die pads; preparing an insulation resin sheet having a first and a second surfaces; preparing a resin-sealing metal mold having cap pins; mounting the resin sheet inside the resin-sealing metal mold in such a manner that the second surface of the resin sheet contacts an inner bottom surface of the resin-sealing metal mold; mounting power chips on the surfaces of the die pads; positioning the frames on the first surface of the resin sheet in such a manner that the back surfaces of the die pads contact the first surface of the resin sheet; pressing the die pads toward the resin sheet using the cap pins and fixing the die pads; injecting a sealing resin in the resin-sealing metal mold and hardening the sealing resin; and removing the semiconductor device in which the power chips are molded with the sealing resin out from the resin-sealing metal mold. The resin sheet may include a metal foil which is disposed to the second surface.

If the surface of metallic mold should not be highly transcribed to the surface of product in injection molding the plastic products, the transcription defects such as weld, shrinkage, etc. are caused to the surface of product. Further, if the resin should be exposed to the surface of high temperature metallic mold more than necessary during the molding, the filler and the like of glass and so forth are contained into the resin, and in this case, they are left over on the surface of metallic mold, resulting in the transcription defect. These problems can be solved by heating the surface temperature of metallic mold higher than the glass transfer temperature of resin if the resin is non-crystal and higher than the fusion point temperature if the resin crystal, with the temperature raising speed of more than 2° C. every second, maintaining this temperature during the resin charging, and by cooling at the lowering speed of more than 2° C. every second after the completion of charging. This temperature control shall be conducted with the feed back control while detecting the surface temperature of metallic mold by the temperature detection sensor mounted at the position close to the surface of metallic mold.

The invention discloses a preparation method of a large quartz ceramic crucible, which is formed based on the method of gel casting molding, and particularly comprises the following steps: a) taking fused quartz with purity of 99.0-99.9% according to the mass percent as a raw material, and carrying out granular grading on the grains of the fused quartz; b) uniformly mixing the raw material proportioned by the step a), adding gel solution, preparing into pulp in a ball mill or a blender; c) injecting or pressure-injecting the prepared pulp prepared by the step b) into a preheated metal mold, and taking out from the metal mold after the pulp is solidified into green bodies; d) naturally drying the green bodies; and e) putting the dried green bodies into a high-temperature furnace, baking toobtian the large quartz ceramic crucible. Raw material grain proportioning and the preparation method, optimized by the invention, can product the quartz ceramic crucible with larger overall dimension and thin wall for fusion of special glass, casting of polycrystalline and calcining of rear earth material.