158 results about "Metal injection molding" patented technology

The invention belongs to the technical field of steel materials, and particularly relates to powder for metal injection molding, electronic equipment, a steel structural part and a preparation method of the powder for metal injection molding, and the powder for metal injection molding comprises the following elements of, by weight, 16.01%-16.99% of Co, 7.31%-8.40% of Cr, 5.65%-6.65% of Mo, 7.01%-7.99% of Ni and 0.20%-0.40% of Nb. And the weight percentage of Fe is greater than or equal to 59.57%. By the adoption of the powder for metal injection molding, preparation of a high-strength and high-toughness steel structural part with the yield strength not lower than 2000 MPa and the elongation not lower than 5% can be achieved.

The invention provides a high-performance neodymium-iron-boron magnet formed by MIM (metal injection molding), which comprises the following components in percentage by weight: 28 to 38 weight percent of Re, 4 to 5 weight percent of FeB, 0.05 to 0.2 weight percent of Cu, 0 to 0.15 weight percent of Al, 0.15 to 0.3 weight percent of Ga, 0.2 to 1.5 weight percent of Co, 0.15 to 0.2 weight percent of Zr and the balance of iron and other inevitable impurities, the MIM injection molding process is carried out under the protection of nitrogen, the position of an extrusion material rod opening and the interior of a mold cavity are both under the protection of inert gas, and the extrusion material rod opening and the mold cavity are sealed. Meanwhile, a mold core is in a pulsed magnetic field environment in the injection molding process, it is guaranteed that the magnet has a proper neodymium-rich phase by regulating the rare earth content to be 28-38%, and therefore the coercive force of the magnet is improved, the compactness of the magnet is improved, the production cost is reduced, and through the optimized jet milling technology, the particle size and particle size distribution of neodymium-iron-boron powder are controlled, so that the yield of neodymium-iron-boron powder is improved. And meanwhile, the proportions of the magnetic powder with different particle sizes are adjusted through the sorting wheel, so that gap coating of the pre-coating solute is facilitated, and the injection molding density of the MIM neodymium iron boron is improved.

The invention relates to the technical field of metal injection molding, and discloses a process for preparing an ultrahigh-toughness MIM part through integration of multistage degreasing and gradient sintering, and the process comprises the following steps: metal powder and a binder are mixed in proportion, and uniform feed is obtained after banburying and granulation; injection-molding the feedstock into a green body; the green body is sequentially subjected to catalytic degreasing and stepped thermal degreasing, the catalytic degreasing is carried out in a nitric acid-containing atmosphere, and the thermal degreasing is carried out in a multi-stage heating procedure under the protection of inert gas; and carrying out multi-stage gradient sintering on the degreased green body in a vacuum or inert atmosphere, wherein the multi-stage gradient sintering comprises low-temperature pre-sintering, medium-temperature deoxidization and decarbonization and high-temperature densification sintering. According to the invention, through organic combination of multi-stage catalytic degreasing and stepped thermal degreasing, efficient and thorough removal of the binder is realized, carbon residues, bubbles and internal defects caused by incomplete degreasing are effectively avoided, and the quality of the green body and the structural integrity before sintering are improved.

The invention discloses a low-cost high-polishing titanium alloy plug housing injection molding method, and belongs to the technical field of metal injection molding. The method comprises the following steps: powder preparation, raw material weighing, internal mixing, granulation, injection molding, acid degreasing, thermal degreasing and vacuum sintering, and polishing. Titanium alloy powder used in the method is composite powder formed by adding 0-50 [mu] m non-spherical powder into 0-60 [mu] m spherical powder prepared through a plasma atomization method (PDPA). The cost of the non-spherical titanium powder is far lower than that of spherical titanium powder, and the production cost is relatively reduced by more than 80%; the 0-60 [mu] m spherical powder prepared by the plasma atomization method is high in powder permeability, and sintering densification is facilitated; the sintering shrinkage coefficient of the porous titanium alloy part with the complex shape prepared through vacuum sintering is accurately controlled to be 1.20-1.350, and extra shaping matched equipment is not needed; according to the high-polishing titanium alloy product part manufactured through the method, the density is larger than or equal to 4.45 g / cm < 3 >, the tensile strength is larger than or equal to 950 MPa, the elongation after fracture is larger than or equal to 12%, and the hardness is larger than or equal to 350 (HV).

A high-precision metal injection molding mechanism and method. The use of a connection and driving mode that "two ends of an integrated piston and piston rod are respectively connected to a feed screw and a material storage driving assembly, and the material storage driving assembly provides motion power" can reduce the length of the piston and the feed screw while ensuring a large material storage capacity, so that the strength is improved, and the stability of the mechanism is improved, thereby improving the injection precision. In addition, high-frequency response servo valves are respectively arranged on the oil inlet side and the oil outlet side of an injection oil cylinder for double-response control; in addition to controlling the injection speed by means of quick response-based valve opening adjustment on the oil outlet side, the injection speed of the piston is also controlled by controlling the oil inlet amount by means of quick response-based valve opening adjustment on the oil inlet side, achieving multi-stage control of the injection speed.

The invention discloses a preparation method of a high-strength and high-plasticity titanium alloy, which comprises the following steps: weighing spherical TC4 powder and irregular TiH2 powder according to the ratio of (11: 1)-(7: 1); tC4 powder, TiH2 powder and a binder are mixed together; putting the mixed feed into a granulator for extrusion granulation to obtain a granular injection feed; putting the granular injection feed into an injection stock bin, and injecting into a mold to obtain a TC4 green body; the TC4 green body is subjected to degreasing treatment; and the TC4 degreased blank is sintered and cooled along with a furnace, and a TC4 sintered part is obtained. According to the method, a certain proportion of irregular TiH2 powder is doped in spherical TC4 powder, the titanium alloy is manufactured through the metal injection molding technology, and by means of the fact that the TiH2 powder is prone to generating the phase change process from TiH2 to alpha + H2 under the high-temperature condition, the Ti-Ti bond of H in the titanium alloy is weakened, the atomic diffusion rate is increased, TC4 crystal grains are broken, full-dense sintering is promoted, and the titanium alloy is obtained. And therefore, the density of the titanium alloy material is improved, and a titanium alloy product obtains high strength and high plasticity and toughness.

The invention discloses an integral forming process of a square shaft rocker arm, which comprises the following steps: mixing metal powder and an organic binder according to an accurate proportion, and heating and stirring to form uniform feed; preparing the uniformly mixed feed into granules; a corresponding mold is designed according to the shape and size of the square shaft rocker arm; feeding the granular feed into an injection molding machine, injecting the granular feed into a preset mold under high-temperature and high-pressure conditions, and gradually removing the binder in the green body through a thermal degreasing method; putting into a high-temperature sintering furnace, and heating to a high temperature below a metal melting point in vacuum, so that metal particles are fused to form a compact structure; quenching, tempering and other processes are conducted on the sintered square shaft rocker arm, and electroplating treatment is conducted on the surface of the square shaft rocker arm; the method has the beneficial effects that the compactness and the mechanical property of the product are remarkably improved by utilizing a metal injection molding technology, and the service life of the product is far beyond that of a conventional part.

The invention provides a polyformaldehyde-based metal injection molding feed as well as a preparation method and application thereof, and the polyformaldehyde-based metal injection molding feed comprises the following components in percentage by mass: 87-97% of metal powder and 3-13% of a binder, the metal powder comprises tungsten powder; the tungsten powder comprises first tungsten powder and second tungsten powder; the average particle size of the first tungsten powder is larger than that of the second tungsten powder; the binder comprises polyformaldehyde, a skeleton unit and a formaldehyde inhibitor. In the invention, the polyformaldehyde-based metal injection molding feed has good fluidity, stability and sintering performance, can be recycled for multiple times, is beneficial to improving the strength and degreasing efficiency of an injection blank, can reduce the production cost and energy consumption, and can obtain a product with better performance.

The invention relates to the field of powder injection molding materials, in particular to a metal injection molding aluminum-containing stainless steel material and a preparation technology, and the stainless steel material comprises the following components in percentage by mass: 6-8 wt% of Ni, 15-18 wt% of Cr, 0.5-2.5 wt% of Al and 1t of C; 0.2 wt%, and the O content is lt; the low-carbon and low-oxygen metal powder is obtained through vacuum gas atomization, the metal powder is formed through the injection molding process and then is degreased through organic oxalic acid, hydrogen is adopted in the whole process of the thermal degreasing stage, and the low-carbon and low-oxygen metal powder is obtained through the gas atomization powder preparation process, so that the low-carbon and low-oxygen metal powder is obtained. The aluminum-containing stainless steel material which is low in carbon, low in oxygen, high in compactness, high in strength, high in corrosion resistance and high in high-temperature creep resistance is obtained through the processes of heat treatment, rapid heating and heat preservation, and the C content of the stainless steel material prepared through the preparation process is 1t after heat treatment; 0.2 wt%, oxygen content lt; the 0.2 wt% structure is compact, the sintering density is high, and the normal-temperature and high-temperature mechanical strength is higher than that of conventional materials such as 304L, 316L and 17-4PH.

The invention discloses a surface-modified metal powder and application thereof in MIM metal injection molding, belongs to the technical field of metal injection molding, and is used to solve the problems in the prior art that the intermolecular force between the metal powder and the binder is poor, resulting in low density and strength of the injection blank, and high dimensional change rate of the material during high-temperature degreasing. The invention is processed by the following steps: adding a modifier and acetone into a reactor and stirring until the system is dissolved, adding activated metal powder into the reactor, and performing secondary coating on the metal powder to form a surface-modified metal powder with a double-layer coating, so that the metal powder can be arranged and combined more closely during the MIM injection molding process, thereby improving the density and strength of the injection blank, and improving the dimensional stability of the final product by optimizing the composition of the mixed polymer.

The invention belongs to the technical field of metal powder injection, and particularly discloses metal injection molding machining equipment which comprises a mounting frame and an injection machine body arranged in the mounting frame, and the injection machine body comprises a fixedly-arranged injection cylinder pipe and an injection nozzle arranged at the front end of the injection cylinder pipe. The injection cooling parallel assembly is arranged in front of the injection machine body; and the multi-axis ball screw is used for driving the two groups of mold locking and demolding assemblies to translate. The independent pressure maintaining and cooling unit is additionally arranged, and the mold translation mechanism is utilized, so that the two pairs of molds achieve alternate parallel operation between the injection unit and the pressure maintaining and cooling unit, and the molds are separated from the nozzle and moved to a pressure maintaining station after injection is completed; the pouring system aggregate cut off during separation is used for subsequent pressure-maintaining compensation filling by the pressure-maintaining unit, so that the pressure-maintaining cooling procedure which consumes long time is independent, and the single forming period is greatly shortened.

The invention provides a beryllium-titanium alloy injection molding feed and a preparation method thereof, and relates to the technical field of metal injection molding. The beryllium-titanium alloy injection molding feed is prepared by mixing composite beryllium-titanium alloy powder and a catalytic degreasing binder according to the mass ratio of (70-80): (20-30), the composite beryllium-titanium alloy powder is composed of, by mass, 40% of spherical beryllium powder, 30% of spherical titanium powder and 30% of irregular beryllium powder. The D90 of the spherical beryllium powder and the spherical titanium powder is 60-80 [mu] m, and the D90 of the irregular beryllium powder is 6-10 [mu] m; the catalytic degreasing binder is prepared from the following components in parts by mass: 76 to 84 parts of polyformaldehyde, 7 to 9 parts of high-density polyethylene, 5 to 7 parts of ethylene-vinyl acetate copolymer, 3 to 5 parts of paraffin, 0.1 to 1.5 parts of stearic acid, 0.1 to 1.5 parts of polyethylene glycol and 0.1 to 1 part of BASF antioxidant. The spherical powder and the irregular powder are reasonably proportioned, so that the powder stacking density and sintering compactness are improved, and meanwhile, the flowability is considered.

A method is shown for manufacturing a hardened gripping element for a sealing and restraint system used for forming a pipe joint in a fluid pipeline. Instead of machining the gripping elements used in the system from a metal stock, a special series of metal injection molding steps are utilized. A metal polymer composite mix is first formed having a metal particulate phase and a polymer phase. A green metal composite article is formed by either extruding the composite mix or molding the composite mix into a metal polymer composite article having at least one gripping surface having a plurality of gripping teeth. The green composite article is subjected to thermal debinding and sintering to produce a brown part. The brown part is selectively hardened in the range from about 42 HRC to 45 HRC to produce a finished or near finished hardened gripping element.

This utility model relates to the field of fixture technology, and in particular to a forming fixture for a swivel-type product in a metal injection molding process. It includes: a lower mold plate and a fixed mold fixing plate fixedly installed on the top of the lower mold plate; an inner wall forming assembly for forming the inner wall of the product; an outer wall forming assembly for forming the outer wall of the product; a upper mold plate and a moving mold fixing plate fixedly installed at the bottom of the upper mold plate. This utility model places the product inside the outer wall forming assembly via the inner wall forming assembly. Then, the upper mold plate, under the action of a forming press, simultaneously forms both the inner and outer walls of the product. This forming fixture can correct two dimensions at once, ensuring that the product dimensions are within the specified range, thus aiding in concentricity alignment during subsequent machining.

The utility model discloses a waterproof structure of a power inlet end, and particularly relates to the technical field of automobile power distribution unit waterproofing, which comprises a waterproof plastic shell, a power inlet stud is arranged in the waterproof plastic shell, and a conductive bus bar is further arranged in the waterproof plastic shell. A plugging stress part is formed at the joint of the conductive bus bar and the waterproof plastic shell, a U-shaped area is arranged on the surface of the conductive bus bar, and the U-shaped area is arranged in a U-shaped power input mode. According to the utility model, the conductive bus bar is designed to be U-shaped, and the injection molding bonding stroke of the conductive bus bar and plastic is increased, so that the range of a plugging stress part is effectively reduced to the whole stroke of an electricity inlet port and the U-shaped bus bar, the stress caused by vibration or plugging is avoided, and the stress possibility after injection molding of plastic and metal is effectively avoided; and the high-speed increase of the cost is avoided.

The invention relates to the field of powder injection molding materials, in particular to an NbC particle reinforced ultra-high-strength steel composite material and a molding process thereof, the composite material is prepared by mixing NbC powder and ultra-high-strength steel powder, the volume ratio of the NbC powder to the ultra-high-strength steel powder is 1: 19-3: 17, namely, the volume fraction of NbC is 5%-15%. The D50 of the NbC powder is 1.0 [mu] m + / -0.5 [mu] m. The forming process comprises the steps of raw material preparation, mixing, banburying and granulation, injection molding, degreasing, sintering and heat treatment. The NbC particles in a specific proportion are added into an ultrahigh-strength steel matrix through a metal injection molding process, so that the wear resistance of the material is remarkably improved, meanwhile, the high-strength characteristic is kept, and the dual requirements of high strength and high wear resistance are met.

The invention discloses a metal injection molding stainless steel material and a preparation method thereof in the technical field of stainless steel metal materials, through precise design of material components and collaborative optimization of a preparation process, comprehensive improvement of the metal injection molding stainless steel material in the aspects of performance, production efficiency, stability and the like is achieved, and the metal injection molding stainless steel material is obtained by combining a subsequent sintering process. And the final material is high in density and uniform in mechanical property. The wax-based binder is combined with the high-dispersion nanocellulose and the catalytic degreasing agent, so that step-by-step efficient removal of pre-degreasing and high-temperature degreasing is realized, and the degreasing period is shortened; the nano-crystalline cellulose forms a rigid framework and is matched with a gradient heating process, so that the cracking and deformation risks of the green body in the degreasing process are greatly reduced.

The utility model provides a non-metal injection molding frame for a photovoltaic panel, which comprises a photovoltaic panel assembly and comprises the following structures: an outer frame, a first clamping groove and a second clamping groove which are fixedly arranged on the long edge and the wide edge of the outer frame respectively; the device comprises at least three sliding seats, ball sleeves are arranged on the opposite sides of the adjacent sliding seats, a ball head is movably connected to the middle of each ball sleeve, the ball sleeves, the ball heads, the first connecting rods and the second connecting rods complete connection and assembly of the two adjacent sliding seats, the first connecting rods, the second connecting rods and the sliding seats are matched, and the deflectable design between the adjacent sliding seats is completed. And limited bending deflection of the adjacent sliding seats is completed, the limiting bending design of the photovoltaic panel assembly is achieved, subfissure of solar cells caused by excessive bending of the photovoltaic panel assembly is avoided, and the technical problem that a frame of an existing flexible photovoltaic panel is lack of bending limiting treatment is solved.

The application relates to a feed for metal injection molding, a preparation method of the feed and a metal product, wherein the preparation method of the feed comprises the following steps: S1, obtaining the following components according to weight parts: 40-50 parts of Fe elements, 2-8 parts of Ni elements, 20-25 parts of Cr elements, 20-25 parts of Co elements, 2-8 parts of Mo elements, 2-8 parts of Cu elements, 0.1-3 parts of Si elements, 1-3 parts of Mn elements, mixing and then heating to melt the material, and then adopting a high-pressure water-gas combined atomization method to obtain mixed powder; S2, obtaining a forming agent; S3, preheating the mixed powder obtained in S1 under vacuum conditions, then adding the forming agent into the mixed powder for mixing, and then performing plasticizing extrusion granulation to prepare the feed. The feed can meet the size precision requirements of MIM injection, green compact degreasing sintering and related post-process machining, the existing MIM materials on the market cannot simultaneously meet the problem of high polishable hardness, and the obtained metal product has the comprehensive advantages of appearance and hardness.

The invention discloses automatic breaking equipment for metal edge materials of metal injection molded parts, and relates to the field of metal injection molded part machining, the automatic breaking equipment comprises a machine body, a feeding mechanism, a rotating mechanism, a breaking mechanism and a discharging mechanism, the feeding mechanism comprises a mechanical arm assembly and a conveying belt assembly, and the mechanical arm assembly is used for grabbing the to-be-machined injection molded parts on the conveying belt assembly; the rotating mechanism comprises a rotating disc and a fixed disc, a plurality of positioning modules distributed circumferentially are arranged on the rotating disc, downward pressing assemblies are fixed to the fixed disc, a waste collecting pipeline is arranged at the position, located below the downward pressing assemblies, of the first table plate, and the breaking mechanisms correspond to the downward pressing assemblies one to one; the injection molding part is fed and discharged in a circumferential water flowing mode, metal edge materials of the injection molding part can be broken off while feeding and discharging are conducted, waste discharging is fast, the operation procedure is optimized, the machining efficiency of the injection molding part is improved, and the production cost is reduced. And the positioning module is matched with the downward pressing assembly, so that the injection molding part can be accurately positioned, and stable fixation of the injection molding part in the breaking process is ensured.

The invention relates to the technical field of metal insert injection molding, and particularly discloses a processing device and method for improving the problem of metal insert injection flash, S1, metal shell part MIM molding: molding a metal shell part by adopting a metal injection molding process, and designing a blind hole structure in a character position of the metal shell part, a local bulge structure is designed outside; s2, injection molding and filling of PC plastic: carrying out injection molding on the molded metal shell part, and filling the PC plastic; s3, carrying out post-treatment to remove a blind hole convex structure: carrying out polishing and grinding treatment on a product subjected to injection molding by utilizing processing equipment for improving the injection flash problem of the metal insert, and removing the blind hole convex structure; the special blind hole and local protrusion structure design is carried out on the character position of the metal shell part, and subsequent post-processing steps are carried out, so that the problems of flash and R angle of the character position of the metal part are effectively solved, and the possibility of flash is reduced from the source.

TITLE: TURBOMACHINE TURBINE BLADE AND MANUFACTURING METHOD BY METAL INJECTION MOLDING A first aspect of the invention relates to a turbomachine turbine blade (10) comprising a blade (100) extending along a longitudinal direction defining a blade length and comprising an external surface having: an upper surface (112) and an lower surface (114) opposite each other along a transverse direction, a leading edge (116) and a trailing edge (118) connecting the upper surface (112) to the lower surface (114) and separated from each other by a width (L2) of the blade, according to which: the turbine blade is made of a material comprising a metallic material (140) encapsulating at least one fiber (150) arranged in the turbine blade and at a distance from its external surface, at least one of the fibers being a reinforcing fibre (152) extending longitudinally in the blade and along its entire length.Figure to be published with the abbreviation: Figure 3.

The invention discloses a servo control magnesium alloy semi-solid injection molding machine, and relates to the technical field of metal injection molding. A material is driven by a stud, pressure is low during injection, pressure is generally applied through pushing of a piston and driving of an auxiliary stud, however, pressure cannot be buffered during pressure application, instantaneous pressure is too large, and the material overflows in the injection process, and the material is extruded and pushed in the piston movement process through cooperation of a sliding disc and a scraping ring, so that the material is prevented from overflowing. In the injection process, through elastic deformation of the inner backing ring, the contact pressure of the sliding disc and the semi-solid magnesium alloy is transmitted to the inner backing ring, the inner backing ring deforms under the pressure, the sliding disc slides in the circular groove of the piston, the pressure is buffered, and the situation that the pressure is buffered while auxiliary materials are injected into a mold is avoided; and the situation that materials overflow at the injection connection position due to the fact that instantaneous pressure is large is avoided.

The utility model provides a kind of metal injection molding part, including injection molding main body piece and metal insert, metal insert includes the embedding portion and protruding portion connected, embedding portion is embedded in injection molding main body piece, embedding portion and injection molding main body piece between form parting surface, protruding portion is located injection molding main body piece close to parting surface one side, recess is provided on the circumferential surface of protruding portion, recess is used to accommodate overflow injection molding material from parting surface.The utility model is provided with recess on the protruding portion of the metal insert of the metal injection molding part, equivalent to set up a gully barrier on the path of injection molding material melt flow, when injection molding material melt is injected into injection molding mold, injection molding material melt flowing to parting surface will first fill recess, to continue to overflow to form burr, so recess on metal insert digests the kinetic energy and pressure of injection molding material melt, significantly increase the difficulty of injection molding material melt overflow parting surface, to reduce the generation of burr.

The embodiment of the invention provides martensitic steel, a preparation method of the martensitic steel, a structural part and terminal equipment. The martensitic steel comprises the following elements in percentage by mass: 7%-9% of Ni, 16%-18% of Co, 5%-8% of Mo, 7%-9% of Cr, 0.1%-0.6% of Nb and 0.03%-0.12% of C, and Fe and other trace elements. Due to the specific elements and the mass ratio of all the elements in the martensitic steel, the martensitic steel can be produced through powder forming technologies such as metal injection forming, and the martensitic steel produced through the powder forming technology can also have high strength and excellent toughness.

The invention discloses a preparation method of a high-flow-rate feed for metal injection molding, which comprises the following steps: step 1, bimodal stainless steel powder and a composite binder are weighed, the bimodal stainless steel powder comprises coarse powder and fine powder, the ratio of the coarse powder to the fine powder is 6: 4-7: 3, and the composite binder comprises polyethylene glycol, zinc stearate and paraffin; secondly, vacuum deoxidation and cooling protection are conducted on the double-peak stainless steel powder, screening is conducted on the double-peak stainless steel powder, and drying treatment is conducted on the composite binder; thirdly, the composite binder and the double-peak stainless steel powder are put into an internal mixer to be subjected to internal mixing; and step 4, putting the material obtained by banburying into a granulator for extrusion granulation. According to the preparation method of the high-flow-rate feed for metal injection molding, spherical metal granulation powder with two granularities is adopted as a raw material, coarse powder provides mobility, gaps are filled with fine powder so that the sintering density can be improved, and a composite binder with polyethylene glycol as a main material is adopted, so that the degreasing time is effectively shortened, and the carbon residue is reduced.

This utility model relates to the field of fixture technology, and in particular to a shaping fixture for a support component product in a metal injection molding process, comprising: an upper cover and a lower fixed plate; two shovels symmetrically arranged and slidably mounted on the lower fixed plate; and a product fixing seat. A first convex groove cooperating with the product fixing seat is provided in the middle of the lower fixed plate. In this utility model, the product fixing seat is filled with the product, and the filled product fixing seat is pushed into the first convex groove in the lower fixed plate, so that the top of the product is below the upper cover, and the two sides of the product correspond to the positions of the two shovels. A shaping press applies force to the upper cover, pressing it down so that the upper cover is pressed against the plane of the lower fixed plate, shaping the upper surface of the product. Simultaneously, during the pressing down of the upper cover, the two shovels move towards the product, shaping the left and right sides of the product.

The utility model relates to a high temperature and high pressure resistant bidirectional pressure bearing all-metal hard sealing butterfly valve, which belongs to the technical field of hard sealing butterfly valves, and comprises a valve body, a rotating shaft of the valve body is fixedly connected with an overturning unit, the overturning unit comprises a valve plate, and the front side and the rear side of the valve plate are respectively provided with a sealing rubber ring and a clamping ring; first annular grooves are formed in the outer sides of the front portion and the rear portion of the valve plate correspondingly, second annular grooves are formed in the outer sides of the first annular grooves correspondingly, and the inner sides of the sealing rubber rings are clamped to the inner sides of the corresponding second annular grooves correspondingly. The valve plates, the sealing rubber rings and the clamping rings are connected with the corresponding first annular groove, the second annular groove and the third annular groove in a clamped mode and then fixed through the connecting bolts, the tight fit structure can effectively prevent medium leakage, the valve plates are arranged in a front-back half-and-half mode and connected with the rotating shaft through the connecting grooves, the valve plates rotate flexibly, opening and closing operation is faster, and the service life of the valve plates is prolonged. The valve plate and the clamping ring are made of all-metal injection molding, high in strength and capable of bearing high temperature and high pressure.

The invention relates to the technical field of hardware injection molding, and discloses a fitting quick-mounting jig which comprises a base, a fitting positioning structure and an ejection structure, the fitting positioning structure is mounted on the base and comprises a fitting positioning boss, and a first mounting groove and a second mounting groove which are used for placing fittings are formed in the fitting positioning boss; the ejection structure comprises an ejection assembly and a fitting push-out ejector pin, the ejection assembly is installed on the side, away from the fitting positioning structure, of the base, one end of the fitting push-out ejector pin is connected with the ejection assembly, and the other end of the fitting push-out ejector pin penetrates through the base and the fitting positioning boss to be suitable for making contact with a fitting. The fitting positioning structure further comprises a positioning pin, and the positioning pin is installed in the first installation groove and used for positioning the fitting. According to the structure, the production continuity and the comprehensive efficiency of the injection molding equipment are improved. The position precision of the hardware fitting in the jig and the final position precision of the hardware fitting in a mold cavity are guaranteed, the product size consistency is effectively improved, and the yield is increased.

The invention discloses a titanium alloy coarse particle powder recovery EIGA atomization method, and aims at solving the technical problems that an existing titanium alloy coarse particle powder recovery process is complex, melt pollution is likely to be caused, the fine powder conversion rate is low, and industrial batch production cannot be achieved. According to the method, the titanium alloy coarse powder with the particle size larger than 53 microns, which is a byproduct produced by gas atomization powder preparation, is used as a raw material, the steps of raw material pretreatment, closed type controllable powder feeding, sectional type induction smelting, controllable flow guiding and atomization, spheroidizing solidification and graded collection are sequentially conducted, the powder feeding rate and the melting rate are dynamically matched in real time, the yttrium oxide sleeve sectional induction heating process is combined, and the titanium alloy powder with the particle size larger than 53 microns is obtained. The coarse powder is directly converted into high-added-value titanium alloy fine powder; according to the method, the technological process is short, 24-hour continuous industrial production can be achieved, the oxygen content of the prepared regenerated powder is smaller than or equal to 800 ppm, the total yield of the high-added-value powder is larger than or equal to 65%, and the performance of the powder completely meets the high-end powder use requirements of additive manufacturing and metal injection molding.