7results about How to "Improve casting quality" patented technology

This invention belongs to the field of casting binder technology, and particularly relates to an environmentally friendly water glass casting binder with anti-aging function. The raw material composition of this invention includes: sodium water glass, lithium water glass, polymethyl methacrylate, and lithium carbonate, which enables: 1. Polymethyl methacrylate combined with lithium carbonate to provide more hydrogen bonds to the water glass binder system, changing the surface potential energy and solvation ability of the water glass, improving the stability of the water glass, and thus obtaining better "anti-aging" ability; 2. Lithium carbonate itself has the effect of a dispersant, and combined with water glass at a specific modulus, it can further improve the dispersibility of the sand mold; 3. Polymethyl methacrylate itself has basic bonding strength, and by limiting the modulus of the water glass, it can also appropriately improve the bonding strength of the entire binder; 4. The amount of organic polymethyl methacrylate added to this binder is sufficiently small, ensuring that the binder has sufficient safety and environmental protection advantages.

A sand mold assembly for casting wheel hub side molds, comprising an upper sand mold and a lower sand mold; characterized in that the wall thickness of the left and right longitudinal cavity walls of the lower sand mold is greater than the wall thickness of the front and rear transverse cavity walls; a first lower riser socket with an upward opening is provided on the left longitudinal cavity wall, which is used to supply casting molten metal to the casting cavity; a liquid inlet channel is provided on the wall of the upper sand mold located on the left side of the core, and a pair of second upper riser channels, positioned front and rear, are provided on the wall of the upper sand mold located on the right side of the core, which respectively penetrate downward through the bottom wall of the upper sand mold; when the upper and lower sand molds are closed together, the liquid inlet channel is used to supply casting molten metal to the first lower riser socket, and the second upper riser channels connect to the casting cavity and are used to supply casting molten metal to the casting cavity; at the same time, optimizing the wall thickness and riser structure of the sand mold can greatly improve the casting quality of the wheel hub side mold casting.

The application discloses a molding method of a horn-shaped protective cover casting of a gas turbine, the shape of the casting is flat horn-shaped, the inside of the casting is a hollow structure, one end of the casting is a cover opening, the lower part of the small caliber of the cover opening is a cover neck part, the cross section of the cover neck part is elliptical, the structure is a columnar body with uneven wall thickness in each section, the included angle a between the central axis of the columnar body and the normal line of the cross section of the cover opening is an acute angle, the upper surface of the columnar body and the bottommost cross section of the cover opening form a certain included angle, a protruding annular body in the inside of the cover neck part divides the casting into a first casting body and a second casting body, the structure of the casting model for forming the casting mold comprises a mold plate and a mold sample fixedly installed on the mold plate, the structure of the mold sample comprises a sand core mold sample for forming a sand core cavity and directly installed on the mold plate, and a mold mold sample for forming the outer contour of the casting and the inner cavity structure of the first casting body and located above the sand core mold sample and in an integrated structure with the sand core mold sample.

This application relates to a mold and casting process for casting end caps of shell-type hydraulic valve bodies, belonging to the technical field of casting processing. The mold includes a mold body with a cavity formed within it. A runner sand core is disposed within the cavity and fixedly connected to the mold body. A gating port is provided at the bottom of the mold body and communicates with the cavity. The bottom gating assembly includes a sprue base plate and a vertical gating pipe. A horizontal runner is provided within the sprue base plate, with its length direction along the horizontal direction. The vertical gating pipe is vertically positioned above the sprue base plate, with its lower end connected to the sprue base plate and communicating with the horizontal runner. The mold body is fixed to the sprue base plate, and the gating port communicates with the horizontal runner. This application reduces the occurrence of splashing, turbulence, and air entrapment of molten metal within the cavity, thereby reducing the generation of secondary oxidation inclusions and porosity defects inside the casting, which improves the final casting quality.

A casting sprue cup comprises a cup body, a partition and a first partitioning member, the cup body is provided with a pouring hole and a cavity for containing a metal solution; the partition is connected to the cup body and separates the cavity into a first chamber and a second chamber, the partition is provided with a passage communicating the first chamber and the second chamber, and the pouring hole communicates with the first chamber; the first partitioning member is arranged in the passage, and the first partitioning member can partition the passage, and melts when the metal solution is poured to a preset height of the second chamber, so that the first chamber and the second chamber are communicated. In the application, the cavity of the cup body is separated into the first chamber and the second chamber by the partition, the passage is opened after the first partitioning member melts under heat, the metal solution separated from impurities flows into the first chamber through the passage, and finally enters the sprue through the pouring hole, so that the impurity layer is not disturbed by the high-speed flowing metal liquid, the impurities in the metal solution are reduced to enter the sprue, and the casting quality is improved.

This application discloses an automotive wheel hub mold with upper and lower split side molds, including an upper mold, a lower mold, and several side molds. The side molds include a front wheel rim side mold and a rear wheel rim side mold that fit together vertically. The front wheel rim side mold is equipped with a cooling device. This cooling device guides the cooling medium to uniformly and rapidly cool the thickness portion where the front wheel rim connects to the spokes. It includes a cooling chamber, a reflector plate, a water inlet pipe, and a return pipe. The reflector plate is located at the top of the cooling chamber. One end of the water inlet pipe extends into the cooling chamber and slopes upwards towards the reflector plate. The core solution employs a cooling device with a reflector plate. Through optimized pipe structure and program control, uniform dispersion and cooling of the cooling medium are achieved, improving the casting efficiency and solidification quality of this type of wheel, while reducing localized thermal shock to the mold and reducing the risk of surface cracking.

This invention belongs to the technical field of automotive steel manufacturing, specifically relating to a green, low-carbon high-strength automotive steel and its preparation method. The invention adds nickel-doped modified niobium carbide to the high-strength steel, dispersing it in the iron matrix to effectively improve the strength and toughness of the steel plate and increase its porosity. Simultaneously, the addition of Ca, Mg, and lanthanum and cerium carbonate as composite refining agents to the alloy melt improves casting quality and mechanical properties. Furthermore, precise control of the composition of elements such as C, Mn, Si, Cr, Mo, Cu, and Ti, combined with hot rolling, cold rolling, continuous annealing, or hot-dip galvanizing processes, enables the material to possess both high strength and excellent porosity.