Stamping

About: Stamping is a research topic. Over the lifetime, 22501 publications have been published within this topic receiving 83554 citations.

Process for making reusable tooling

Abstract: A reusable, low investment tool for making parts is made by a process in which a mixture of sand and an activator is applied as a layer onto which a printed resin is deposited to form a base and a pattern. A plurality of sidewalls may also be provided on the base using the same process. The tool is coated with a curable resin to form a protective shell. The reusable tool may be used as a dump box or as a vacuum forming tool for forming parts. A stamping die may be formed by drawing a vacuum through the sand layer as the resin coating is applied to more fully permeate the stamping die.

A comprehensive review of characterization and simulation methods for thermo-stamping of 2D woven fabric reinforced thermoplastics

Abstract: Thermo-stamping is critical for the structural application of two-dimensional (2D) woven fabric reinforced thermoplastics (WFRTPs). Reliable simulation models for thermo-stamping of 2D WFRTPs can effectively reduce the time and tooling cost caused by trial-and-error development, and thus are crucial for mature manufacturing. This article presents a survey of the literature on the characterization and simulation for thermo-stamping of WFRTPs. First, the investigations of the main deformation mechanisms of thermo-stamping and the corresponding experimental characterization methods are summarized. Then, we highlight the development of simulation models for the stamping and cooling steps, as well as the progress in the development of the continuous virtual process chain (CAE chain) for the simulations of the entire forming process and the structural performance prediction of molded parts. As the study on the stamping process becomes mature, a closed simulation optimization chain for WFRTP's thermo-stamping process has gradually been developed to reduce the overall development costs of high-performance WFRTPs.

Method for stamping a part from a multi-layered strip

Abstract: A method of stamping a part from an elongated strip of multi-layered material. The multi-layered material includes a viscoelastic intermediate layer, and upper and lower layers that are relatively rigid with respect to the intermediate layer. The method includes providing symmetrically aligned top and bottom punches each including a material displacement edge corresponding with a desired shape of the part. Each of the material displacement edges are defined by a rake surface and a part interface surface that combine to form a positive rake angle. The strip is positioned between the top and bottom punches. The top and bottom punches then shear a portion of the upper and lower layers, respectively. More particularly, symmetrical groove patterns are formed in the upper and lower layers, defining a perimeter of the part. The part is then removed from the strip along the perimeter.