A method of manufacturing a valve body having one or more corrosion-resistant internal surfaces. The method involves performing a casting process, which includes pouring a first material into a mold box, to produce a valve body casting made of the first material. During the casting process, a layer of a second material is formed on one or more internal surfaces of the valve body casting, the second material having a higher corrosion resistance than the first material, by: (1) applying, with an additive manufacturing technique, the second material to one or more external surfaces of a core, and (2) inserting the core into the mold box. A portion of the first material binds to the second material on the one or more external surfaces of the core while the first material is poured into the mold box.

Methods and systems for creating a mold for a cast memorialization product are described herein. In a process for creating a mold, a three-dimensional (3D) model of a product design is generated. The product design includes customized features for a memorialization product. A mold design is generated based upon the 3D model of the product design. Printing instructions for creating the mold are generated and accessed by a processing device. The mold is created according to the printing instructions. A product, such as a bronze memorialization product, can be cast using the mold.

Methods and systems for creating a mold for a cast memorialization product are described herein. In a process for creating a mold, a three-dimensional (3D) model of a product design is generated. The product design includes customized features for a memorialization product. A mold design is generated based upon the 3D model of the product design. Printing instructions for creating the mold are generated and accessed by a processing device. The mold is created according to the printing instructions. A product, such as a bronze memorialization product, can be cast using the mold.

An opening is provided in a foam pattern, and a coating agent is applied to the opening. The coating agent applied to the opening is taken as a beam having a sectional secondary moment I, a vertical plate thickness h, and a length L. It is assumed that a volume of a cavity part in the foam pattern is V (mm.sup.3), a bulk density of the casting sand filling the cavity part is ρs (kg/mm.sup.3), a density of the melt is ρm (kg/mm.sup.3), an angle of the opening with respect to a vertical direction is θ, and a transverse strength of the coating agent at the highest temperature during pouring of the melt is σb (MPa). A sectional shape of the opening, the angle θ of the opening, and the transverse strength σb of the coating agent are selected to satisfy the expression:

σbI>V(ρm−ρs){(hL/2)sin θ−cos θ}.

A casting method of using 3D printing to make shell mold, comprising the following steps of: conducting computer-aided graphic design based on the product to be manufactured; importing the graphic design into the 3D printer to print a 3D shell mold; conducting a sintering process of the printed shell mold for solidifying thereof; using the sintered shell mold as a casting cavity, injecting a molten raw material into the shell mold for formation; in the end, taking out the whole shell mold and breaking the shell mold to obtain a cast product; reprocessing the cast product to obtain a finished product; wherein printing materials of the 3D printing are made of a liquid mixture of photosensitive resin and ceramic powder, thereby improving production efficiency and reducing labor intensity as well as pollution.

A casting method of using 3D printing to make shell mold, comprising the following steps of: conducting computer-aided graphic design based on the product to be manufactured; importing the graphic design into the 3D printer to print a 3D shell mold; conducting a sintering process of the printed shell mold for solidifying thereof; using the sintered shell mold as a casting cavity, injecting a molten raw material into the shell mold for formation; in the end, taking out the whole shell mold and breaking the shell mold to obtain a cast product; reprocessing the cast product to obtain a finished product; wherein printing materials of the 3D printing are made of a liquid mixture of photosensitive resin and ceramic powder, thereby improving production efficiency and reducing labor intensity as well as pollution.

A casting mold molding machine includes a green sand mold molding sensor including a pressure sensor for evaluating moldability of a green sand mold molded by a casting mold molding machine, wherein the pressure sensor is embedded in a squeeze board or squeeze feet that compresses green sand.

A casting mold molding machine includes a green sand mold molding sensor including a pressure sensor for evaluating moldability of a green sand mold molded by a casting mold molding machine, wherein the pressure sensor is embedded in a squeeze board or squeeze feet that compresses green sand.

The present invention relates to a resin composition that comprises an acetoacetate ester compound with at least two acetoacetate ester functional groups, an acrylate compound with at least two acrylate functional groups, and a tertiary amine curing catalyst. This resin composition acts as an isocyanate-free binder that is less toxic to the environment. The invention further discloses a method for preparation fiber reinforced parts comprising fibers and said resin composition as well as a method for the preparation of foundry molds for the casting industry, which is based on said binder.

The present invention relates to a resin composition that comprises an acetoacetate ester compound with at least two acetoacetate ester functional groups, an acrylate compound with at least two acrylate functional groups, and a tertiary amine curing catalyst. This resin composition acts as an isocyanate-free binder that is less toxic to the environment. The invention further discloses a method for preparation fiber reinforced parts comprising fibers and said resin composition as well as a method for the preparation of foundry molds for the casting industry, which is based on said binder.