Process Parameter Experiments on Vacuum Casting Using a Silicone Rubber Mold for ABS Plastic Parts

2011 ◽  
Vol 201-203 ◽  
pp. 1668-1671
Author(s):  
Dar Yuan Chang ◽  
Chyn Shu Deng
Keyword(s):  
Silicone Rubber ◽  
Optimal Parameter ◽  
Rapid Tooling ◽  
Process Parameter ◽  
Taguchi’S Method ◽  
Vacuum Casting ◽  
Soft Mold ◽  
Master Pattern ◽  
Plastic Parts ◽  
Silicone Rubber Mold

Silicone rubber mold is one of soft mold processes for rapid tooling. Based on a master pattern, it can be used for casting the materials of wax, plastic, and low-melting metals directly during a short developing time, very suitable for sample fabrications. This paper conducts vacuum casting experiments by Taguchi’s method to derive the optimal parameter selections on ABS plastic vacuum casting using a silicone rubber mold. The factor that affects pouring characteristics maximally is the mold vacuuming time.

Development of a Low-Cost Automatic Vacuum Degassing System for Rapid Tooling

2013 ◽  
Vol 459 ◽  
pp. 349-355
Author(s):  
Chil Chyuan Kuo ◽  
Min Hsiang Wu ◽  
Ming Yang Lai
Keyword(s):  
Silicone Rubber ◽  
Human Error ◽  
Low Cost ◽  
Vacuum Pump ◽  
Vacuum Casting ◽  
Vacuum Degassing ◽  
Casting System ◽  
Air Pollutions ◽  
The Cost ◽  
Silicone Rubber Mold

Silicone rubber mold is frequently used in the indirect tooling. Automatic vacuum casting system is widely used to degas in the manufacturing of silicone rubber mold, but the cost of hardware is very expensive. A low-cost automatic vacuum degassing system is designed, build and test in this study. Optimized parameters for degassing process are investigated. The saving in the degassing time is about 23.4%.This system offers many advantages such as reducing human error of operator, reducing noise and air pollutions derived from the vacuum pump of the vacuum casting system.

Technical Development on Large Size Silicone Rubber Mold

2011 ◽  
Vol 341-342 ◽  
pp. 406-410
Author(s):  
Chil Chyuan Kuo ◽  
Zhi Yang Lin ◽  
Wang Lin Tsai
Keyword(s):  
New Product Development ◽  
Silicone Rubber ◽  
Dimensional Accuracy ◽  
Green Manufacturing ◽  
Rapid Tooling ◽  
Product Development Process ◽  
Large Size ◽  
Mold Fabrication ◽  
The Cost ◽  
Silicone Rubber Mold

Rapid tooling technology is regarded as an important method of reducing the cost and time to market in a new product development process. Silicone rubber mold is frequently employed in the indirect tooling. Based on green manufacturing, an environment friendly process for making large size silicone rubber is developed and implemented in this work. This method provides a new, simple, and green manufacturing to produce large size silicone rubber mold without loss of dimensional accuracy, geometrical accuracy, and surface roughness. The advantages of this method include high yields of the mold fabrication, reducing the cost in the mold fabrication, and environmentally conscious manufacturing. The saving in the cost of the rapid tooling is up to 66.41%.

Use of a layered silicone rubber mold technique for denture processing

1961 ◽  
Vol 11 (4) ◽  
pp. 657-664 ◽  
Author(s):  
Keith R. Marcroft ◽  
Raymond L. Tencate ◽  
William W. Hurst
Keyword(s):  
Silicone Rubber ◽  
Silicone Rubber Mold

Optimization of RF Magnetron Sputtering Process Parameters Based on Genetic Algorithm and Neural Network

2015 ◽  
Vol 1109 ◽  
pp. 481-485
Author(s):  
Norlina Mohd Sabri ◽  
Nor Diyana Md Sin ◽  
Mazidah Puteh ◽  
Mohamad Rusop
Keyword(s):  
Neural Network ◽  
Genetic Algorithm ◽  
Magnetron Sputtering ◽  
Band Gap ◽  
Optical Band Gap ◽  
Optimal Parameter ◽  
Rf Magnetron Sputtering ◽  
Process Parameter ◽  
Thin Film Fabrication ◽  
Parameter Combination

A procedure for RF magnetron sputtering process parameter optimization is proposed in this paper. This study has been focusing on determining the optimal parameter combination for producing the desirable optical band gap. In this proposed procedure, Genetic Algorithm (GA) has been adapted as the optimization tool, while Artificial Neural Network (ANN) has been implemented as the prediction model. GA was adapted to search for the optimal parameter combination from the set of parameters, while later the ANN modeling had been utilized to predict the optical band gap energies for each of the parameter combinations. The result from the GA optimization is expected to produce the highest band gap value. The computational results from the proposed procedure were then compared with the actual laboratory experimental results from the ZnO thin film fabrication. Based on the comparison result, the performance of the proposed procedure had proven to be promising in determining the most optimized process parameter combination from the set of parameters.

Flexible Micro-Structured Mold for UV Micro-Casting of Polymeric Microdevices

2009 ◽  
Vol 74 ◽  
pp. 7-10
Author(s):  
L.P. Yeo ◽  
L. Wang ◽  
Zhi Ping Wang ◽  
Yee Cheong Lam
Keyword(s):  
Silicone Rubber ◽  
First Generation ◽  
Potential Method ◽  
Production Method ◽  
Process Conditions ◽  
Uv Curable ◽  
Crosslinked Polymer ◽  
Photosensitive Resin ◽  
Uv Curable Resin ◽  
Silicone Rubber Mold

UV micro-casting is a promising mass production method for replication of polymeric microdevices due to the non-stringent process conditions and fast curing time. This paper describes a potential method to mass produce polymeric microdevices. The first generation mold for UV micro-casting was fabricated by using chemically micro-etched copper clad laminate (CCL) base substrate. Subsequently a two part silicone rubber was cast over the CCL micro-feature mold. Photosensitive resin was dispensed onto the silicone rubber mold and a transparent Mylar thin film was placed on top of the UV curable prepolymer. After the silicone rubber mold-resin-Mylar assembly was UV irradiated for tens of seconds, the crosslinked polymer, together with the Mylar film was peeled off from the mold. The cross-linked polymer was placed on top of a second layer of Mylar film dispensed with the similar UV curable resin. In this way, a complete polymeric micro device could be efficiently produced.

Analysis of the Quality of Rapid Manufacturing Technology Based on the Silicone Rubber Mold

2013 ◽  
Vol 432 ◽  
pp. 253-257
Author(s):  
Xue Fang Chen ◽  
Jian Hong Du ◽  
Hong Wei Li
Keyword(s):  
Silicone Rubber ◽  
Manufacturing Technology ◽  
Curing Temperature ◽  
Rapid Manufacturing ◽  
Manufacturing Processes ◽  
Exhaust Port ◽  
Channel Distribution ◽  
Mold Making ◽  
Silicone Rubber Mold

The rapid manufacturing processes include making prototype mold, making silicone rubber mold and pouring parts. According to the study of rapid manufacturing based on silicone rubber mold, factors that impact the characteristics of products, the quality of surface and the accuracy of dimension are discovered. The curing temperature and time affect the properties of products. The smoothness of prototype surface, gate position, exhaust port position, channel distribution and pouring speed affect the quality of the products surface. The shrinkage of the material affects the accuracy of products dimension. Moreover, some measures and methods that improve the products quality also be illustrated.

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