scholarly journals Development of the composition of a lubricant for injection under pressure with high sedimentation stability

2020 ◽  
pp. 31-35
Author(s):  
A. A. Pivovarchyk ◽  
A. M. Mikhaltsov ◽  
Ya. I. Tsishkova
Keyword(s):  
Rotational Speed ◽  
Mixing Time ◽  
Die Casting ◽  
Ferrous Alloy ◽  
Ferrous Alloys ◽  
Sedimentation Stability ◽  
High Sedimentation ◽  
Optimal Mode ◽  
Mixing Frequency ◽  
Conducting Research

The article describes the requirements for the lubricant used in injection molding of non-ferrous alloys. A methodology for conducting research to determine the sedimentation stability of a prepared lubricant is presented, as well as the results of a study of the sedimentation stability of a lubricant used in non-ferrous alloy die casting. It was established that in order to significantly increase the sedimentation stability of the compositions of lubricants for casting silumin based on the selected components, it is necessary to pre-heat the initial components to a temperature of at least 80 °C and mix them at a rotational speed of the dispersant blades of at least 6000 min–1. The optimal mode of lubrication with high sedimentation stability (more than 200 days) is observed at the following temperature and time indicators: the temperature of the heating of the starting components is at least 90 °C, the mixing time is 5 minutes, and the mixing frequency is 18000 min–1.

scholarly journals Advanced materials used for development of lubricated compositions for die casting

2019 ◽  
pp. 70-73 ◽  
Author(s):  
A. M. Mikhaltsov ◽  
A. A. Pivovarchyk ◽  
A. A. Skaskevich
Keyword(s):  
Vegetable Oil ◽  
Die Casting ◽  
Polymer Materials ◽  
Advanced Materials ◽  
Petroleum Jelly ◽  
Ferrous Alloys ◽  
Properties Of Materials ◽  
Conducting Research ◽  
Materials Used ◽  
Lubricating Properties

The article presents the requirements for the lubricants used in die casting of non-ferrous alloys and polymer materials. The methodology for conducting research to determine the lubricating properties of materials, as well as the results of studies of the lubricating qualities of materials used in the development of lubricant compositions for die casting of non-ferrous alloys and polymer products are presented. It is shown that the use of the materials researched under study reduces the effort to extract the metal rod from the casting by 4.5–8.9 times. It has been established that it is advisable to use petroleum jelly and fus (by-product of vegetable oil) as materials used to develop the composition of a lubricant for die-casting non-ferrous alloys and polymer products. The lubricity of these materials is, on average, 28.8–51.2% higher than that of other lubricants studied.

scholarly journals The Temperature Measurement of Die : Study on Die Casting of Ferrous Alloy, 1st Report

1973 ◽  
Vol 39 (318) ◽  
pp. 731-741
Author(s):  
Yukio HAGA ◽  
Akio IWAGAMI ◽  
Kiyoshi NISHIMOTO ◽  
Toshio ASAEDA
Keyword(s):  
Temperature Measurement ◽  
Die Casting ◽  
Ferrous Alloy

scholarly journals Characteristics of Wastes Produced by Polish Ferrous Alloys Casting Foundries between the Years 2010–2014

2020 ◽  
Vol 3 (4) ◽  
pp. 70-77
Author(s):  
Mateusz Skrzyński
Keyword(s):  
Ferrous Metal ◽  
Ferrous Alloy ◽  
National Scale ◽  
Ferrous Alloys ◽  
Waste Storage ◽  
Central Statistical ◽  
Central Statistical Office ◽  
And Storage ◽  
Annual Amount

The balance of wastes originating from the foundry processes of ferrous alloys, prepared on the basis of data made available by the Polish Central Statistical Office, is presented in this paper. The kind and amount of individual foundry wastes subjected to management and storage by foundry plants were analysed. The problem of wastes between the years 2010–2016 is discussed on the national scale, as well as in individual regions or voivodeships. Altogether, 27,375.9 tons of waste from the group no. 10, of which non-ferrous metal and ferrous alloy wastes from foundry plants constituted 2%, were produced in Poland in 2010. This situation remained at a similar level over successive years, till 2014. The positive prognosis constitutes the fact that the amount of waste stored on dumping grounds belonging to foundry plants in Poland is gradually decreasing. This may be related to increasing costs of waste storage. During the tested years, the annual amount of gathered waste decreased from 4,796.6 thousand tons (in 2010) to 4,477.6 thousand tons (in 2014).

scholarly journals Application of Solid Dispersion Technique to Improve Solubility and Sustain Release of Emamectin Benzoate

Molecules ◽  
2019 ◽  
Vol 24 (23) ◽  
pp. 4315
Author(s):  
Bin Bin Huang ◽  
Dong Xu Liu ◽  
De Kun Liu ◽  
Gang Wu
Keyword(s):  
Solid Dispersion ◽  
Rotational Speed ◽  
Mixing Time ◽  
Solid Dispersions ◽  
Aqueous Solubility ◽  
Feed Ratio ◽  
Emamectin Benzoate ◽  
Wettable Powder ◽  
Dispersion Technique ◽  
Pvp K30

The solid dispersion technique, which is widely used in the medical field, was applied to prepare a pesticide dosage form of emamectin benzoate (EM). The preparation, physicochemical characterization, aqueous solubility, release dynamics, photolytic degradation, bioactivity, and sustained-release effects of the prepared EM solid dispersions were studied by a solvent method, using polymer materials as the carriers. Water-soluble polyvinyl pyrrolidone (PVP) K30 and water-insoluble polyacrylic resin (PR)III were used as the carriers. The influence of various parameters, such as different EM:PVP-K30 and EM:PRIII feed ratios, solvent and container choices, rotational speed and mixing time effects on pesticide loading, and the entrapment rate of the solid dispersions were investigated. The optimal conditions for the preparation of EM-PVP-K30 solid dispersions required the use of methanol and a feed ratio between 1:1 and 1:50, along with a rotational speed and mixing time of 600 rpm and 60 min, respectively. For the preparation of EM-PRIII solid dispersions, the use of methanol and a feed ratio between 1:4 and 1:50 were required, in addition to the use of a porcelain mortar for carrying out the process. Under optimized conditions, the prepared EM-PVP-K30 solid dispersions resembled potato-like, round, and irregular structures with a jagged surface. In contrast, the EM-PRIII solid dispersions were irregular solids with a microporous surface structure. The results of X-ray powder diffraction (XRD), differential scanning calorimetry (DSC), ultraviolet (UV) spectrometry, and infrared (IR) spectrometry showed that the solid dispersions were formed by intermolecular hydrogen bonding. The solid dispersion preparation in PVP-K30 significantly improved the solubility and dissolution rate of EM, particularly the aqueous solubility, which reached a maximum of 37.5-times the EM technical solubility, when the feed ratio of 1:10 was employed to prepare the dispersion. Importantly, the wettable powder of EM-PVP-K30 solid dispersion enhanced the insecticidal activity of EM against the Plutella xylostella larvae. Furthermore, the solid dispersion preparation in PRIII afforded a significant advantage by prolonging the EM technical release in water at a pH below 7.0, especially when the PRIII content in solid dispersions was high. While the amplified toxicity of the wettable powder of EM-PRIII solid dispersions against the P. xylostella larvae showed no significant differences from that of the EM technical, the long-term toxicity under the field condition was much better than that of the commercially available EM 1.5% emulsifiable concentrate. Notably, solid dispersions with both the PVP-K30 and PRIII carriers reduced the effect of UV photolysis.

scholarly journals The Temperature Measurement of Die : Study on Die Casting of Ferrous Alloys, 1st Report

1973 ◽  
Vol 16 (100) ◽  
pp. 1590-1601
Author(s):  
Yukio HAGA ◽  
Akio IWAGAMI ◽  
Kiyoshi NISHIMOTO ◽  
Toshio ASAEDA
Keyword(s):  
Temperature Measurement ◽  
Die Casting ◽  
Ferrous Alloys

scholarly journals On Die Casting of Cast Iron : Study on Die Casting of Ferrous Alloys, 3rd Report

1973 ◽  
Vol 16 (100) ◽  
pp. 1612-1622
Author(s):  
Go SUZUKI ◽  
Kiyoshi NISHIMOTO ◽  
Toshio ASAEDA
Keyword(s):  
Cast Iron ◽  
Die Casting ◽  
Ferrous Alloys

scholarly journals The mixing of cohesive and flowable powder materials using a common laboratory powder mixer

Food Research ◽  
2021 ◽  
Vol 5 (S1) ◽  
pp. 19-24
Author(s):  
Mohd Radzuan N. ◽  
Anuar M.S. ◽  
S.M. Tahir
Keyword(s):  
Rotational Speed ◽  
Mixing Time ◽  
Powder Materials ◽  
Mixing Process ◽  
Experimental Conditions ◽  
Powder Bed ◽  
Powder Mass ◽  
Cohesive Powder ◽  
Mixture Homogeneity ◽  
Common Laboratory

This study presented the homogeneity obtained when mixing cohesive and flowable powder materials using a laboratory powder mixer. The mixing process parameters studied were the mixing time and the mixer rotational speed (20 rpm, 40 rpm and 60 rpm) at the different ratios (95%: 5%, 50%: 50% and 5%: 95%) of the cohesive cocoa and flowable mannitol powder materials. The homogeneity sampled at the powder bed surface showed that only at the highest rotational speed of 60 rpm used in this work yield acceptable homogeneity at the two extremes of the powder mass ratios; 95%: 5% and 5%: 95% of mannitol: cocoa for some of the locations on the powder bed surface, especially near the wall of the mixer. Other combinations of the experimental conditions did not yield acceptable mixture homogeneity. These results showed the difficulties in obtaining a homogeneous powder mix when mixing cohesive powder materials, especially in academic teaching and research laboratories using a simple powder mixer apparatus.

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