scholarly journals RAPID COOLING EFFECT IN POLYPROPYLENE MELT SPINNING-INFLUENCE OF STRESS

1976 ◽  
Vol 32 (6) ◽  
pp. T248-T253
Author(s):  
Jiro Shimizu ◽  
Kozo Shimazaki
Keyword(s):  
Melt Spinning ◽  
Cooling Effect ◽  
Rapid Cooling ◽  
Polypropylene Melt

Nano scale dynamics of bubble nucleation in confined liquid subjected to rapid cooling: Effect of solid-liquid interfacial wettability

2017 ◽  
Author(s):  
Mohammad Nasim Hasan ◽  
Kazi Fazle Rabbi ◽  
K. M. Mukut ◽  
Saiful Islam Tamim ◽  
A. H. M. Faisal
Keyword(s):  
Bubble Nucleation ◽  
Cooling Effect ◽  
Rapid Cooling ◽  
Nano Scale ◽  
Solid Liquid

Optimization of Manufacturing Parameters for Melt Spun Yarns Using Taguchi Method

2014 ◽  
Vol 556-562 ◽  
pp. 4264-4267
Author(s):  
Shu Wen Wang ◽  
Te Li Su
Keyword(s):  
Taguchi Method ◽  
Melt Spinning ◽  
Parameter Design ◽  
Controllable Factors ◽  
Melt Spun ◽  
Spun Yarns ◽  
Spinning Process ◽  
Polypropylene Melt ◽  
Manufacturing Parameters

In melt spinning process, evenness of polypropylene melt spun yarns affects the appearance, hairiness, strength and productivity of yarns, as well as product production and profits, causing rejection due to nonconformity. The research is to find optimal manufacturing parameters of melt spun yarns. Firstly, to proceed the parameter design by Taguchi method, then to select a manufacturing parameter which will affect the quality of melt spun yarns as controllable factors. Also to choose a suitable orthogonal arrays. Meanwhile, according to variation of analysis, to decide optimal manufacturing parameters of melt spun yarns and its remarkable factor. Finally, using 95% confidence interval to proof the experiment’s reliability and repeatability.

scholarly journals THE ESTIMATION OF BIREFRINGENCE IN POLYPROPYLENE MELT SPINNING PROCESS

1973 ◽  
Vol 29 (5) ◽  
pp. T205-T210 ◽  
Author(s):  
Jiro Shimizu ◽  
Kozo Shimazaki
Keyword(s):  
Melt Spinning ◽  
Spinning Process ◽  
Polypropylene Melt

scholarly journals THE SPINNING SIMULATION OF POLYPROPYLENE MELT SPINNING AND ITS BIREFRINGENCE

1973 ◽  
Vol 29 (10) ◽  
pp. T442-T450
Author(s):  
Jiro Shimizu ◽  
Kozo Shimazaki
Keyword(s):  
Melt Spinning ◽  
Polypropylene Melt

An Outline of Methods in Machining Curved Hole

2011 ◽  
Vol 328-330 ◽  
pp. 181-185
Author(s):  
Ying Ping Qian ◽  
Yin He ◽  
Ju Hua Huang ◽  
Xi Zhi Zhou
Keyword(s):  
Injection Molding ◽  
Cooling Effect ◽  
Cooling Channel ◽  
Conformal Cooling Channel ◽  
Rapid Cooling ◽  
Conformal Cooling ◽  
Cooling Stage ◽  
Curved Hole

Cooling stage is a key stage of injection molding. It affects both the quality and efficiency of injection molding of products. Conformal cooling channel, due to its advantages in uniform cooling and rapid cooling, could improve the cooling effect obviously. Therefore, study on methods of machining curved hole are proposed to be used for practice. In this thesis, some methods of machining curved hole and their features in general were introduced.

scholarly journals EFFECT OF RAPID COOLING IN THE MELT SPINNING OF POLYPROPYLENE

1974 ◽  
Vol 30 (3) ◽  
pp. T87-T95 ◽  
Author(s):  
Jiro Simizu ◽  
Kozo Shimazaki
Keyword(s):  
Melt Spinning ◽  
Rapid Cooling

scholarly journals THE ANALYSIS OF QUENCHING PROCESS IN POLYPROPYLENE MELT SPINNING

1966 ◽  
Vol 22 (5) ◽  
pp. 197-205 ◽  
Author(s):  
Nobuo Yamada ◽  
Yuji Sano ◽  
Toshiyuki Nanbu
Keyword(s):  
Melt Spinning ◽  
Quenching Process ◽  
Polypropylene Melt

EM of rapidly solidified permanent magnets

1992 ◽  
Vol 50 (1) ◽  
pp. 198-199
Author(s):  
Raja K. Mishra
Keyword(s):  
Melt Spinning ◽  
Permanent Magnets ◽  
Dark Field Image ◽  
Dark Field ◽  
Maximum Energy ◽  
Quench Rate ◽  
Maximum Energy Product ◽  
Energy Product ◽  
Annular Dark Field ◽  
Rapidly Solidified

The discovery of a new class of permanent magnets based on Nd2Fe14B phase in the last decade has led to intense research and development efforts aimed at commercial exploitation of the new alloy. The material can be prepared either by rapid solidification or by powder metallurgy techniques and the resulting microstructures are very different. This paper details the microstructure of Nd-Fe-B magnets produced by melt-spinning.In melt spinning, quench rate can be varied easily by changing the rate of rotation of the quench wheel. There is an optimum quench rate when the material shows maximum magnetic hardening. For faster or slower quench rates, both coercivity and maximum energy product of the material fall off. These results can be directly related to the changes in the microstructure of the melt-spun ribbon as a function of quench rate. Figure 1 shows the microstructure of (a) an overquenched and (b) an optimally quenched ribbon. In Fig. 1(a), the material is nearly amorphous, with small nuclei of Nd2Fe14B grains visible and in Fig. 1(b) the microstructure consists of equiaxed Nd2Fe14B grains surrounded by a thin noncrystalline Nd-rich phase. Fig. 1(c) shows an annular dark field image of the intergranular phase. Nd enrichment in this phase is shown in the EDX spectra in Fig. 2.

Sign in / Sign up

Export Citation Format

Share Document