Plastics under pressure
Article Abstract:
Vacuum forming of plastics allows high pressure forming, HPF, which is more cost effective when compared to injection moulding and structural foam moulding. Design considerations and part size are involved in the selection of a suitable process. HPF is the best suited for less than 10,000 parts while injection moulding is ideal for parts higher than 10,000. Structural foam moulding process is advocated for parts only if pieces require rigidity and paint is used as a finish. Tooling is the most important factor considered while evaluating the three processes.
Publication Name: Engineering
Subject: Science and technology
ISSN: 0013-7782
Year: 1992
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Cleaning up clay
Article Abstract:
The soil vapor extraction techniques for removing volatile organic compounds (VOC) from ground water and unsaturated soils are faster, more efficient, and cost effective than the traditional pump-and-treat cleanup techniques. The two phase and multiphase vacuum extraction (VE) methods require no underground equipment and convert VOCs from the liquid to the vapor state. The two phase VE method has a higher water withdrawal rate and wider effective area. This method efficiently treats groundwater and soil vapors with minimum disturbance to the overlying soil.
Publication Name: Civil Engineering
Subject: Science and technology
ISSN: 0885-7024
Year: 1996
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Broader horizons
Article Abstract:
UK companies must concentrate more on technology transfer to improve their competitive edge in the world economy which is being threatened by the rising economies of the Far East. The advantages of technology transfer are cost-effectiveness, faster solutions and new ways of tackling problems in the manufacturing sector. An example is in the fields of surface treatment and effluent processing. Ion implantation which was originally used in semiconductor processing is now being used in polymer molding processes.
Publication Name: Engineering
Subject: Science and technology
ISSN: 0013-7782
Year: 1996
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