Design improvement of toner cartridge using design for assembly method

DFMA or known as Design for Manufacture and Assembly, consists of two main components which are Design for Manufacturing and Design for Assembly. To review the design for product evaluation, DFMA is an important methodolgy to be used. Reducing the number of parts to be assembled in a product is very significant. This can contribute to reducing the cost of assembly and assembly time for manufacturer. DFMA methodology is therefore applied to reduce the cost of the product by selecting a consumer product which is a toner cartridge as a case study of the product. The DFA Worksheet table is used for product evaluation and the original product design is reviewed, improved and re-evaluated. The significant result shows the new toner cartridge design is achievable with fewer parts from 32 to 27 parts. This method is also eligible for application to manufacturing industries to improve the effectiveness of their design

Overview on the different type of composite materials for footwear application

In 2010, an overview on Malaysian footwear industry that obtained source form Department of Statistics Malaysia (DOSM), the import and export of footwear consist of shoe pad has reached RM 43.99 million and RM 17.04 million in the year 2009

Evaluation of direct rapid prototyping pattern for investment casting

The ability of rapid prototyping (RP) technology t o fabricate direct part of any complex shape as a sacrificial pattern in shorter lead time has benefited the foundry industries significantly . The quality of investment casting (IC) parts is dir ectly related to the master pattern fabricated from RP process. The main objective of this study was to evaluate the quality characteristics of various RP patterns that were fabricated by various RP process es which include 3D Printer (3DP), Fused Deposition Modeling (FDM) and Multijet Modeling (MJ M). Evaluation of the RP patterns was carried out on dimensional accuracy, surface roughn ess and pattern shrinkage. Different internal pattern designs for the RP parts were developed usi ng Insight software for FDM process and Solidworks 2011 for other RP systems. In addition t o the quality assessments, the effect of the internal pattern designs on the burn out behaviour of the RP patterns was also evaluated. Experimental results showed that FDM and MJM produc ed patterns with better accuracy, surface roughness and part shrinkage when compared to 3DP. It was evident that the internal pattern structure improved the accuracy of the patterns produced from all RP processes. Results showed that FDM and MJM processes were superior in terms of mold cleanl iness when no residual ash was observed during the burn out stage. Significant oxidation of cerami c powder was observed on the molds of the 3DP patterns which need to be removed manually from the mold