4results about How to "Improve casting yield" patented technology

The invention provides a cast iron sand mold coating and a preparation method thereof, and relates to the field of casting sand mold coatings. The cast iron sand mold coating is composed of the following raw materials: a fireproof filler, a liquid carrier, a suspending agent, a binder and an auxiliary agent. The raw materials comprise, by weight, 65-70% of the fireproof filler, 19-25% of the liquid carrier, 2-4% of the suspending agent, 4.4-5.5% of the binder and 2.4-3% of the auxiliary agent; the refractory filler is composed of magnesia powder, zircon powder and graphite powder; the magnesia powder is composed of light magnesia powder and heavy magnesia powder. According to the cast iron sand mold coating and the preparation method thereof, the problems that an existing shielding type coating is thin in anti-sulfuration coating thickness, poor in anti-sulfuration coating stability, general in anti-sulfuration effect and large in gas forming amount can be effectively solved, poor spheroidization and casting defects of castings are effectively avoided, the production cost is reduced, and the stability of the castings is improved.

The invention discloses an electric drive rear axle reduction gearbox assembly passive lubricating structure and a vehicle, and belongs to the technical field of automobiles, the electric drive rear axle reduction gearbox assembly passive lubricating structure comprises a gearbox shell, a gearbox front cover, a first gear set, a second gear set, a differential mechanism set, a plurality of oil grooves and a plurality of oil guide grooves; the gearbox shell and the gearbox front cover are connected through bolts to form a sealed cavity for containing all the gear sets and the differential mechanism set. A plurality of oil grooves and oil guide grooves are formed in the gearbox shell and used for guiding and distributing lubricating oil; an oil guide plate and an oil drainage groove are arranged on the gearbox front cover, so that the flowing path of lubricating oil is further optimized; power transmission is achieved between the first gear set and the second gear set through gear meshing, corresponding oil grooves and oil guide grooves are formed in the bearing positions of the gear sets and the differential mechanism set, and sufficient lubrication is guaranteed. The lubricating structure is simple and efficient in design, all key components can be fully lubricated under different working conditions, and therefore the operation stability of the electric drive rear axle reduction gearbox assembly is improved, and the service life of the electric drive rear axle reduction gearbox assembly is prolonged.

The utility model discloses a large-rod-diameter magnesium alloy semi-continuous casting device, and belongs to the technical field of magnesium alloy casting. Comprising a crystallizing device and a shunting disc, wherein the crystallizing device comprises a crystallizing disc in the center and a crystallizer arranged on the outer edge of the crystallizing disc; the shunting disc is arranged right above the crystallization disc, the shunting disc is provided with a cavity, a conical flow guide block is arranged in the cavity, a plurality of flow guide holes are uniformly distributed in the edge of the shunting disc, and magnesium alloy liquid is guided to flow to the edge of the crystallization disc along the flow guide holes; the flow guide hole is communicated with the cavity, and the cavity is connected with a liquid guide pipe; according to the utility model, the whole magnesium alloy rod body is uniformly cooled and shrunk, so that the generation of hot cracks is effectively reduced, and the problem of edge cracks of the large-diameter magnesium alloy rod body is solved.

The utility model provides a mould lock core tool which is used for locking a plurality of sand cores and comprises a base, a supporting plate is arranged on the base, a positioning block used for positioning the sand cores is arranged on the supporting plate, and side pressing assemblies used for pressing the sand cores are symmetrically arranged on the left side and the right side of the supporting plate. A sand shooting plate and an air blowing plate are sequentially arranged above the supporting plate from bottom to top, the side pressing assembly comprises a mounting plate arranged on the supporting plate, an air cylinder is obliquely arranged on the mounting plate, a connecting plate is arranged at the end of a piston rod of the air cylinder, and a plurality of pressing blocks corresponding to sand cores are arranged at the connecting plate. The utility model has the advantages that the resin sand is injected into the sand core cavity and is blown and cured, so that a plurality of sand cores are locked, and the sand core assembly efficiency and the casting yield are improved.