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The cold drawing of amorphous polyethylene terephthalate
Journal of Materials Science, 1975The cold drawing of amorphous polyethylene terephthalate has been studied at constant strain rate over a wide range of temperatures for samples of different molecular weight and different initial molecular orientation (pre-orientation). The natural draw ratio was found to be dependent on pre-orientation, confirming previous studies, and for low degrees
J. S. Foot, I. M. Ward
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2019
Precision cold-drawn tubes are produced by cold drawing and cold pilgering. The cold drawing of the tubes is carried out at the so called draw bench, where the diameter of the tube from a larger diameter to the smaller is drawn through the die of certain dimensions.
Rešković, Stoja, Brlić, Tin
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Precision cold-drawn tubes are produced by cold drawing and cold pilgering. The cold drawing of the tubes is carried out at the so called draw bench, where the diameter of the tube from a larger diameter to the smaller is drawn through the die of certain dimensions.
Rešković, Stoja, Brlić, Tin
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Electrochemical cold drawing of Mg alloy bars
Materials Science and Technology, 2016A new technique, electrochemical cold drawing (ECD), was used to cold drawing AM60B alloy bar. The effects of the processing parameters on the cold drawing forces and drawn bars of magnesium alloy were investigated, including electrolyte, current density, drawing speed and drawing pass.
L. Li +5 more
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On the cold-drawing of plastics
Journal of Applied Polymer Science, 1963The characteristics of the cold-drawing of Lexan polycarbonate are compared with the several proposed mechanisms of cold-drawing. It is concluded that the mechanism of Lazurkin and Fogel'son, involving biased segmental motion, is correct. It is indicated that this mechanism easily explains the neck formation, and it is suggested how the glass ...
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Cold drawing of polyethylene terephthalate/polyethylene films
Journal of Applied Polymer Science, 1987AbstractFilms made from a 77/23 weight percent polyethylene terephthalate/polyethylene blend were stretched using an Instron apparatus. The structures of the samples were examined by methods which included ion beam etching and electron microscopy. The drawn samples exhibited a metallically lustrous and highly reflective surface up to a draw temperature,
W. Berger +3 more
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Extrusion, Tube-making and Cold Drawing
1969The process of extrusion consists of forcing a billet of metal through a die to produce a continuous length of constant cross section corresponding to the shape of the die orifice. A simple analogy of the process is the squeezing of toothpaste from a tube.
J. D. Radford, D. B. Richardson
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The cold-drawing of high density polyethylene
Journal of Materials Science, 1970The cold-drawing of high density polyethylene has been studied over a wide range of temperatures and strain rates for a series of samples of very different molecular weight distribution. A natural draw-ratio was observed which was almost independent of temperature and strain rate, but was sensitive to the weight average molecular weight.
J. M. Andrews, I. M. Ward
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Automatic Chain Cold Drawing Machine Design
2016 International Conference on Network and Information Systems for Computers (ICNISC), 2016Introduced a system of automatic chain drawbench, Achieve a diameter Φ12 to Φ102 feeding tube drawing, the drawing system, blanking the full automation of the entire process. Elaborated on the overall design of the system of automatic chain drawbench, Includes functionality to the core of the PLC and inverter control system architecture, hardware and ...
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Repeated Cold Drawing and Annealing of Polypropylene
Journal of Applied Physics, 1967Samples of polypropylene were cold drawn to a maximum extension of five times their original length and then annealed, under no load, at 160°C. Eighty percent of the extension was recovered on annealing. Samples were then redrawn and annealed again repeating the procedure through five drawing cycles.
Richard G. Crystal, David Hansen
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The cold drawing of high polymers
Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1954Like many other polymers, amorphous polyethyleneterephthalate cold draws in the shoulders of a neck when stretched at room temperature. The draw ratio across the shoulders is not a constant for the polymer, but is found to depend on the temperature and speed of stretching, and on the initial specimen cross-section and birefringence. A local temperature
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