A method for manufacturing a golf club head having a weight member includes: providing a weight block made of a metal material; disposing an isolation layer on the weight block to form the weight member; delivering a wax material to form a wax pattern covering a portion of the weight member; coating the weight member and the wax pattern with a shell mold plaster to form a shell mold covering the same; performing a de-waxing process which leaves a mold cavity in the shell mold; and casting a molten metal material in the mold cavity to form a club head main body, and removing the shell mold to form the golf club head having the weight member embedded in the club head main body. A golf club head manufactured by the method is also disclosed.

The invention relates to a method for producing a ceramic core (4, 4)and to a core produced by this methodfor preparing the production of a casting having hollow structures which the ceramic core is configured to form, making use of a 3D model of digital geometric co-ordinates of the casting, wherein the method comprises the following steps: a) Producing by means of casting technology at least one first portion (4) of the ceramic core including at least one first joining structure (24) in a surface of the portion; b) Producing by means of casting technology or 3D printing technology at least one second portion (4) of the ceramic core including at least one second joining structure (26) matching the first joining structure, in a surface of the portion, wherein the production by means of casting technology comprises the following steps: i. Unpressurized or low-pressure casting of a ceramic core blank, and specifically with an oversize relative to the core (4, 4) according to the geometric co-ordinates; ii. CNC processing of the core (4, 4), according to the 3D model, in a first CNC processing method; c) joining the at least one first and at least one second portion of the core at the matching joining structures to form the core according to geometric co-ordinates of the casting.

In a method for removing a carbon-containing pattern material from a casting shell, a first step evaporates and pyrolizes the pattern material to leave carbon and a second step oxidizes the carbon.

The application provides a plaster casting mold fabrication method for a complicated structure aluminum alloy casting with a large inner cavity and a thin wall, in which, a wax pattern is cleaned with a mixture; closed blind cavity and large plane unbeneficial to plaster mold-filling of the wax pattern are used to exhaust air by using vent holes and waterproof-breathable membranes in cooperation with each other; under pressure difference, plaster powder and mixed aqueous solution are vertically splashed and mixed in a mixing tank to reduce dust discharge; asynchronous mixing and grouting can be realized by left and right mixing tanks in an upper tank of a vacuum tank. The present application can effectively remove the surface parting agent, increase the wettability of the plaster paste and the wax pattern surface, and improve the surface finish of the casting mold.

A self-bonding refractory powder product for use in making a slurry for investment casting molds comprising a coarse refractory powder; a Nano-sized powder; and an organic polymer powder, wherein it does not require aqueous colloidal silica to produce slurries used to build investment casting molds. The Nano-sized powder comprises fumed alumina, boehmite, fumed silica, or fumed titanium oxide or combinations thereof. The coarse refractory powder comprises milled zircon, tabular alumina or fused alumina, fused silica, alumino-silicate, zirconia, and yttria or combinations thereof. The organic polymer powder comprises a cellulose-based material.

A method for producing a ceramic core, and such a core, for preparing the production of a casting having hollow structures. The ceramic core configured to form, making use of a 3D model of digital geometric co-ordinates of the casting. The method involves unpressurized or low-pressure casting of a ceramic core blank, and specifically with an oversize relative to the core according to the geometric co-ordinates, and CNC processing of the core in accordance with the 3D model in a first CNC processing method.

A method of fabricating a casting is provided. The method includes creating a mixture of ceramic powder and a binder, pouring the mixture around sacrificial patterns, executing a first thermal treatment to set the mixture into a solid mold without damaging the sacrificial patterns, executing a second thermal treatment to remove the sacrificial patterns without removing any of the binder from the solid mold, executing at least one of a third thermal treatment and a chemical treatment to remove a quantity of the binder to transform the solid mold into a solid breakaway mold and pouring molten metallic material into the solid breakaway mold.

A self-bonding refractory powder product for use in making a slurry for investment casting molds comprising a coarse refractory powder; a Nano-sized powder; and an organic polymer powder, wherein it does not require aqueous colloidal silica to produce slurries used to build investment casting molds. The Nano-sized powder comprises fumed alumina, boehmite, fumed silica, or fumed titanium oxide or combinations thereof. The coarse refractory powder comprises milled zircon, tabular alumina or fused alumina, fused silica, alumino-silicate, zirconia, and yttria or combinations thereof. The organic polymer powder comprises a cellulose-based material.

A casting method includes constructing a 3D model to add an inner wall compensation quantity, making a thin shell mold by a 3D printing machine, individually treating the thin shell mold by smooth processing, processing the thin shell mold by multi-layer impregnation slurry or gunite to make an outer shell mold, and to form a double-layer shell mold which includes the thin shell mold and the outer shell mold, processing the double-layer shell mold by sand filling and compressing, clearing the thin shell mold by a physical or chemical process, casting the outer shell mold to form a shaped article, and post processing the shaped article by shaking and sand clearing to form a product.

An apparatus for manufacturing a three-dimensional article by additive manufacturing includes a processor and an information storage device. The information storage device includes a non-transient or non-volatile device storing software instructions. In response to execution by the processor, the software instructions cause the apparatus to: receive initial data defining the three-dimensional article having an outer surface, define a shell having the outer surface of the three-dimensional article and an opposing inner surface that defines an inner cavity, define a three-dimensional lattice within the inner cavity that couples to the inner surface of the shell, identify an unsupported contour of the inner surface of the shell that extends downwardly into the cavity, and define a segment that couples the unsupported contour to the lattice.