37results about How to "Improve mold precision" patented technology

The invention belongs to the field of a high molecular material, and particularly relates to photo-cured elastic photosensitive resin with wavelength being 405 nanometers for 3D printing of digital light processing (DLP). The elastic photosensitive resin comprises the following raw materials based on parts by weight: 10-50 parts of elastic acrylate, 30-70 parts of active diluents, 1-10 parts of photoinitiator, 0.01-0.05 part of flatting agent, 0.01-0.05 part of dispersning agent and 0.01-0.05 part of polymerization inhibitor. The elastic photosensitive resin can be directly used for 3D printing of DLP or can be mixed with other existing photosensitive resin, a product with a complicated structure and certain elasticity can be printed, meanwhile, the elastic photosensitive resin has the characteristics of small volatile odor, rapid formation speed, small product shrinkage rate, high formation accuracy and the like.

The invention discloses a fiberglass enhanced polyphenyl thioether/polyphenylether composite material and a preparation method thereof. The composite material is mainly prepared by the following raw materials: polyphenyl thioether, polyphenylether, fiberglass, mineral filler, a compatibility agent, an antioxidant and a processing aid. The preparation method of the fiberglass enhanced polyphenyl thioether/polyphenylether composite material comprises the following steps of: (a) firstly, respectively blasting and drying polyphenyl thioether resin and polyphenylether resin; (b) weighting the polyphenyl thioether resin and the polyphenylether resin which are dried, the mineral filler, the compatibility agent, the antioxidant and the processing aid; (c) mixing the dry materials in the step (b) to obtain a compound; and (d) adding the compound in the step (c) and the fiberglass to a double screw extruder for melt blending and pelleting. The fiberglass enhanced polyphenyl thioether/polyphenylether composite material can unconspicuously lower the temperature-resistant level and the rigidity of the polyphenyl thioether resin, further improve the molding accuracy of the polyphenyl thioether resin and decrease the cost.

A molten resin P is filled into a cavity 17 through a film gate 17a provided a ring shape in a position corresponding with an outer peripheral edge of the outside surface 7a2 of the seal portion 7a. The molded product removed from the molding die is completed by removing the residual resin gate portion 7d. A gate removal portion 7d1 formed by removing the resin gate portion appears as a narrow ring shape at the outer peripheral edge of the outside surface 7a2 of the seal portion 7a.

The invention provides a zinc alloy for a die. The zinc alloy for the die comprises the following components in percentage by mass: 5 percent to 22 percent of aluminium, 0.01 percent to 0.03 percent of magnesium, 1 percent to 10 percent of copper, 0.05 percent to 0.5 percent of rare earth, 0.01 percent to 0.05 percent of boron, 0.05 percent to 0.1 percent of zirconium, 0.03 percent to 0.1 percent of bismuth and the balance of zinc. According to the zinc alloy for the die, which is provided by the invention, not only can the hardness and the wear resistance be further improved, but also the phenomena of composition segregation and bottom shrinkage are obviously reduced; and on the premise of ensuring the tensile strength basically constant, the size stability and the die making accuracy of the zinc alloy are obviously improved.

A mold for forming a conductive bump, a method of fabricating the mold, and a method of forming a bump on a wafer using the mold are provided. The bump can be formed by employing various materials, the mold can be repeatedly used several times because the mold is not damaged, and due to a high precision, the pitch of the bumps is not limited. The mold for forming a conductive bump comprises a first substrate having a groove to form a bump; a second substrate for vacuum adsorption formed below the first substrate, and having a through-hole in communication with the groove; and a mask layer formed on the first substrate, and used to form the groove.

A method of manufacturing a resin-made joint boot (10) provided with a boot body (12) including a large-diameter tubular part (14), a small-diameter tubular part (16) and a bellows section (18), and a bushing (30) fitted inside the large-diameter tubular part, wherein the boot body and the bushing are separately molded, the bushing is positioned inside the large-diameter tubular part of the boot body, and then, both are integrally fastened by laser welding. The large-diameter tubular part (14) is provided on its internal periphery with an outwardly divergent tilting surface (24) while the bushing (30) is provided with an annular projecting portion (42) to be abuttingly disposed on the tilting surface, and laser (R) is irradiated, penetrating through the annular projecting portion (42) onto the tilting surface (24).

A method for fabricating a mold core (30) includes the following steps: mixing a silicone elastomer with a curing agent (S901); defoaming bubbles of the mixture (S902); forming a layer (10) of the mixture on a substrate (20) having a predetermined surface structure formed thereon (S903); curing the layer of the mixture (S904); and separating the cured layer from the substrate to provide the mold core (S905). Unlike in the prior art, there is no need for steps of forming a photo-resist pattern, forming a Cu layer, and/or etching the Cu layer off. Thus, the method of the present invention has reduced complexity and costs compared with the method of the prior art. In addition, the obtained structure of the mold core corresponds more closely to the predetermined structure of the substrate. That is, the precision of the mold core is significantly increased.

A suspension apparatus comprises a lens holder, a suspension spring and a supporting base. The supporting base is formed with an opening for accommodating the lens holder. The lens holder is for positioning a lens unit. The suspension spring is manufactured by stamping process to form a long strip with a plurality of suspension springs. The strip is then guided into a mold, and plastic injection molding process is performed in that mold so as to produce the lens holder and supporting base affixed respectively to either end of the suspension spring in one piece. After that, excess material of the strip is cut off. The suspension apparatus as above described is suitable for mass production. In addition, because of the high precision of mold, the inaccuracy of assembly and fabrication is minimized. The volume of the whole apparatus and the cost of production are also vastly decreased.

The invention discloses a metallic arc spraying steel-based mold manufacturing method. The metallic arc spraying steel-based mold manufacturing method comprises mold preparation, metallic arc spraying modeling, mold frame manufacturing, mold filling material casting, mold unloading and electric brush degree mold cavity surface polishing treatment, and mold component assembly and mold trial. In the metallic arc spraying modeling process, the consumption of the compressed air is controlled within 1.6 to 2m<3>/min, and the wire feeding speed of the self-consuming electrode wire is controlled within 0.1 to 4.8m/min. The invention has the advantages that the modeling precision of the metallic arc spraying steel-based mold manufacturing method is high, the replicability of the product surface pattern is good, the production efficiency is greatly enhanced, and the modeling precision of the metallic arc spraying steel-based mold manufacturing method is suitable for the new product development and small batch multiple variety production, in particular for the production of steel-based plastic molds, rubber molds and ceramic molds.

The invention belongs to the technical field of bending machine dies and particularly relates to a quick replacement device for an upper die of a bending machine. The problem that screws need to be repeatedly detached when the mechanical-fixing-clamping-type upper die is mounted is solved. The quick replacement device for the upper die of the bending machine comprises the upper die and a die replacement base. The bottom of the die replacement base is provided with an upper die conical mounting groove, the upper die conical mounting groove is matched with a mounting part of the upper die, and notches are symmetrically formed in the two sides of the middle of the upper die conical mounting groove and vertically run through the die replacement base. Symmetric positioning mounting holes are formed in the portion, of the die replacement base, of the two sides of each notch and run through the notches, one side of the upper portion of one positioning mounting hole is provided with a switch mounting blind hole, and the switch mounting blind hole runs through the upper die conical mounting groove. An upper die positioning assembly is installed in each positioning mounting hole and used forfixing the upper die, and a die replacement switch assembly is installed in the switch mounting blind hole and used for detaching the upper die. The quick replacement device effectively solves the problem that the fixing screws need to be repeatedly detached when the mechanical-fixing-clamping-type upper die is mounted.

The invention relates to a new ceramic mold material and a molding technique for replacing gypsum mold and technique needed by traditional ceramic mold technique. Compared with a traditional mold, the inventive mold has the advantages of high strength, long service (a single mold can be used for more than million times), high preciseness, small number of needed single variety mold (hundreds of molds are needed in the traditional technique, while 2-3 molds are needed for the new material rolling technique, 6-8 molds are needed for pressure casting to achieve continuous production), and the like. The popularization of the mold and molding technique can radically change the existing ceramic production situation, save resources and energies, reduce pollution, enhance efficiency and product quality, and provide conditions for modernization and automation of ceramic production.

A method for forming a molded article includes the steps of providing one of vacuum molding and press molding. A sheet of thermoformable material which is heated to a temperature at which the material is moldable is provided and the thermoformable sheet is placed over split mold die and vacuum pressure applied or placed between male and female molds on a press mold and pressure is applied. The molded sheet is removed from the dies, and the two halves of the molded sheet are joined together to form a molded article.

The invention discloses a vehicle type combined inner mold used for urban comprehensive pipe gallery building construction. The vehicle type combined inner mold comprises side molds, a top mold, a frame and a telescopic assembly. The side molds are arranged on the two sides of the frame. The top mold is erected above the side molds on the two sides. The telescopic assembly is arranged on the frame and connects the side molds with the top mold. The frame is directly fixed to a construction position, then, splicing is conducted according to the scale and size of a to-be-constructed comprehensive pipe gallery so that the side molds and the top mold can be spliced, supporting is particularly achieved through the telescopic assembly, an outer mold is spliced outside the side molds and the top mold, concrete is directly poured into the space between an inner cavity mold and the outer side mold, a comprehensive pipe gallery is obtained through pouring and forming, the molds operate in a telescopic manner, and the vehicle type combined inner mold has the beneficial effects of being relatively simple in structure, convenient to operate, high in mold assembling precision, stable in quality, short in construction period, low in construction expense, short in construction influence period, high in production efficiency and the like.

The invention discloses automatic production equipment of a round head pin. The equipment comprises a fixed rotating unit, an automatic feeding unit and a turning unit; the fixed rotating unit is usedfor reinforcing the round head pin to realize turning and rotating driving, and material claws of the automatic feeding unit at least comprise X-axis displacement and Z-axis displacement; and the turning unit comprises a first turning part, a second turning part and a discharging guide rail, wherein the first turning part is used for rough turning, the second turning part is used for finishing turning, the discharging guide rail is used for guiding out a turning finished product, and the first turning part, the second turning part and the round head pin are located on the same horizontal plane. According to the automatic production equipment of the round head pin, automatic production of the round head pins can be realized, and the production efficiency is high. Automatic feeding is realized by the cooperation of the two-shaft material claws and a feeding drawer, the discharging and turning parts are integrated, the automatic feeding and automatic discharging are reasonably allocated,the equipment design is ingenious, and the equipment cost is reduced. The turning unit is provided with two turning stations of the rough turning and the finish turning, the stroke of the two turningstations is consistent, the control is easy to realize, and the forming and machining precision is high.

The hobbing cutter fixed type gear forming machining platform comprises a rack, a workpiece support, a cutter rest used for installing a hobbing cutter, a variable speed toothed belt and a gear pump, the variable speed toothed belt is in transmission through a fixed wheel disc and a movable wheel disc, the fixed wheel disc is fixedly connected to a fixed shaft in a sleeving mode, and the fixed shaft is connected with a synchronous rod through a synchronous belt; the synchronous rod is fixedly connected to the knife rest; the movable wheel disc is fixedly connected to a movable shaft in a sleeving mode, the movable shaft is fixedly connected with a gear shaft of a gear pump, and the gear pump is driven to supply oil to a hydraulic motor driving a workpiece to rotate. A stable power transmission relation can be formed between the workpiece and the hobbing cutter of the hobbing cutter fixed type gear forming machining platform, and the forming machining precision of a gear is high; the speed change gear belt increases the applicability of the whole gear forming machining platform, stable speed change and power transmission can be kept, meanwhile, it is guaranteed that hydraulic pressure is stable, and the machining quality of the whole system is stable.

The invention discloses a manufacturing method of a foldable cushion. The manufacturing method comprises the following steps: preparing a composite sheet body; and putting the composite sheet body inan oven for baking and softening, and placing the softened composite sheet body in a mold for pressing molding, wherein the mold is a cold pressing mold, and before the composite sheet body is placedin the mold to be pressed, the temperature of the lower forming face and the temperature of the upper forming face of the mold are reduced to be smaller than 50 DEG C, a concave-convex surface is distributed on the lower forming surface of the mold, and a concave surface is also distributed on the upper forming surface of the mold. The method has the advantages that the production energy consumption is reduced, the manufacturing cost is saved, and the molding precision is high; the molded cushion is convenient to take out and the mold is convenient to clean; and the steps for manufacturing thecushion are few, the process is simple, one-time forming of the upper and lower concave-convex surfaces of the concave-convex surface cushion is achieved, the modeling requirement of the cushion is met, the concave-convex surfaces are complete, transition is smooth, and the manufacturing effect is good.