The quantity of plastic parts in mechanical and electronic industry during past 2-3 decades has a tendency to grow up. Mechatronics systems, in particular, apply many parts of plastic materials. A plastic, which is one of the most versatile materials in the modern age, is widely used because this is an easiest way to get parts of complicated geometrical form and properties. The injection moldin...

To enhance the productivity and quality of optical-grade liquid silicone rubber (LSR) an optical convex lens simultaneously, uniform vulcanization molding material is required. However, little has been reported on LSR in heated cavity. This paper presents a conformal heating channel to temperature uniformity mold surface injection molding. The curing rate was numerically investigated using Mold...

mold powders are fluxing agents used as raw materials in the steel industry, which play very important role inprocessing stability and final surface quality of a product. surface quality depends particularly on the viscosity and the heat transfer of infiltrated mold flux between the mold wall and the solidified steel shell. heat flux across the interfacial gap depends on thermal properties of s...

One of the most important tasks remaining to be resolved in nanoimprint lithography is the elimination of the resist sticking to the mold during demolding. Previously, the main approach was to apply a thin layer of fluorinated alkyl silane mold-release agent on the surface on the mold; however, this involves complicated steps and high costs. The low surface free energy material polybenzoxazine ...

Mold Shape Deposition Manufacturing (Mold SDM) is a Solid Freeform Fabrication technique for producing complex shaped fugitive wax molds. A variety of castable polymer and ceramic materials have been used to make parts from these molds. This paper describes the Mold SDM method and an automated mold building machine based on a commercial CNC mill. Process steps, material selection and equipment ...

The air-gap nucleation time, the stress evolution and the solid shell growth pattern are examined for different mold topographies to illustrate the potential control of aluminum cast surface morphologies during the early stages of solidification using proper design of mold topographies. The interaction between heat transfer and deformation during the early stages of solidification is considered...

In thermal characterization tests of bone cement according to the ASTM Standard Specification for Acrylic Bone Cement, time-temperature profiles of bone cement were observed to be sensitive to the thickness of the cement patty and the mold material. Due to the heat transfer from cement to the surrounding mold, such tests might underestimate the exothermic temperature of bone cement. Developing ...

Introduction and scope. “Mold spores are omnipresent, and a constantly elevated humidity in given building containing organic components will inevitably lead to [fungal] growth and subsequent damage to the materials” (Gravensen, 1999). In recent years indoor fungal growth and airborne particles have gained the reputation of a serious health threat. The extent to which this perception is justifi...

Both Streptomyces species and mold species have previously been isolated from moisture-damaged building materials; however, an association between these two groups of microorganisms in indoor environments is not clear. In this study, we used a culture-independent method, PCR-denaturing gradient gel electrophoresis (PCR-DGGE), to investigate the composition of the Streptomyces community in house...

In 2003, the American College of Occupational and Environmental Medicine (ACOEM) published its evidence-based statement, "Adverse Human Health Effects Associated with Molds in the Indoor Environment," in its Journal of Occupational and Environmental Medicine (JOEM). ACOEM's author selection, development, peer review, and publication of its mold position paper involved a series of seemingly bias...