نتایج جستجو برای: molding

تعداد نتایج: 5327  

Journal: :Gait & posture 2006
Anne Mündermann James M Wakeling Benno M Nigg R Neil Humble Darren J Stefanyshyn

The purpose of this study was to quantify the effects of selected foot orthoses on muscle activity in the lower extremity during running. Nine male and 12 female recreational runners, clinically and functionally classified as 'pronators', volunteered for this study and performed over-ground running trials at 4m/s in each of four experimental conditions: control, posting, molding, and posting & ...

Journal: :The Cleft palate-craniofacial journal : official publication of the American Cleft Palate-Craniofacial Association 2006
Adam L Spengler Carmen Chavarria John F Teichgraeber Jaime Gateno James J Xia

OBJECTIVE To evaluate the outcome of presurgical nasoalveolar molding therapy in the treatment of patients with bilateral cleft lip and palate. DESIGN A prospective study with blinded measurements. SETTING The Cleft and Craniofacial Clinic at the University of Texas at Houston Medical School, Houston, Texas. PATIENTS Eight patients with bilateral cleft lip and palate, treated between 2002...

2010
Huizhuo Shi Yuehua Gao Xicheng Wang

In this study, an adaptive optimization method based on artificial neural network model is proposed to optimize the injection molding process. The optimization process aims at minimizing the warpage of the injection molding parts in which process parameters are design variables. Moldflow Plastic Insight software is used to analyze the warpage of the injection molding parts. The mold temperature...

2011
Juan Cevallos S. K. Gupta Avram Bar-Cohen

Incorporating moldability considerations during the design of thermally enhanced polymer heat exchangers. Recently, available formulations of thermally enhanced polymer composites are attractive in heat exchanger applications due to their low cost and improved corrosion resistance compared to the conventional metal options. This paper presents a systematic approach to the design of plate-fin he...

2014
Nam P. Suh Chong Won

An interactive computer-based design system is developed to eliminate the need for costly iterations of protype tooling in injection molding. A knowledge-based synthesis system is constructed to embody the principle of a rational design strategy for injection molding by combining a rule-based expert system with process analysis programs. The thermomechanical properties of a molded part are pred...

2014
Sanjeev Kumar Swatantra Agarwal Sankalp Sharma Bharat Kedia

Objectives: This In-vitro study was designed to compare the Impact strength and Residual monomer content of conventional and high impact types of denture base resins polymerized by Compression and Injection molding technique with short curing cycle. Materials and Methods: Forty samples were made (twenty from each technique)in the dimension of 60 × 10 × 3 with 2 mm notch on the thickness side. T...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی امیرکبیر(پلی تکنیک تهران) - دانشکده مهندسی مکانیک 1384

موفقیت در تولید قطعات پیچیده پلیمری از بزرگترین مسائلی است که امروزه با آن روبرو هستیم. با بررسی پیشرفت تکنولوژی پلاستیک در دنیای امروزه، ساخت قالبهای پیچیده ،زمان، هزینه و ریسکهای که در این راه گذاشته می شود بیشتر به اهمیت و حساسیت تولیدمواد پلیمری پی خواهیم برد یکی از مشکلات اساسی فرایند تزریق پلاستیک بحث انقباض قطعه تزریق شده می باشد.این پارامترمهم از ابتدای طراحی قالب تاشروع فرایندتزریق وخ...

1997
David O. Kazmer Tatiana Petrova

Global manufacturers of thermoplastic molded parts increasingly require 100% quality inspection levels that are difficult to achieve. While process complexity makes it difficult to attain the desired part properties during start-up, the stochastic nature of the process causes difficulty in maintaining part quality during production. This paper formally compares several alternative quality contr...

2007
A. Ananthanarayanan S. K. Gupta H. A. Bruck Z. Yu Arvind Ananthanarayanan Satyandra K. Gupta Hugh A. Bruck Zuyuan Yu Kamlakar P Rajurkar

In-mold Assembly process at the mesoscale presents several manufacturing challenges. Results reported in this paper demonstrate the technical feasibility of creating rigid body mesoscale revolute joints using In-Mold Assembly process. The following new results are reported in this paper. First, we describe a mold design with varying cavity shape to perform In-Mold Assembly. This mold design use...

The evaluation of a free fluid surface in a porous medium has several mathematical applications that are important in industries using molds, particularly in the fluid injection process. The vacuum-assisted resin transfer molding (VARTM) process is a promising technology in the primary composite industry. An accurate computational simulation of the VARTM process would be a cost-effective tool i...

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