scholarly journals Extraction of Coconut Milk by Continuous Screw Press

1969 ◽  
Vol 58 (3) ◽  
pp. 322-329
Author(s):  
L. E. Cancel ◽  
J. A. Rosario-Hernández ◽  
E. R. De Hernández
Keyword(s):  
Gradual Increase ◽  
Press Cake ◽  
Solid Material ◽  
Extraction Process ◽  
Hydraulic Press ◽  
Screw Press ◽  
Coconut Milk ◽  
Hammer Mill ◽  
The Press ◽  
Direct Pressure

Studies were conducted on the extraction of coconut milk using a continuous screw press. Speeds of 8.5, 12.5, and 17.5 r/min were used on the pressing screw. Pressures of 60, 80, 100, 120, 140, 160 and 180 lbf/in2 were used on the creeping cone, which in this machine serves as a solids releasing valve. A hydraulic press was used to evaluate the screw-press cake by completely removing the remaining coconut milk from the pressed solid material under a direct pressure of 185 p.s.i./m2 for 1 minute. The results of the experiments indicate a gradual increase in efficiency in the coconut milk extraction process as the pressure is augmented from 60 to 180 lbf/in2, with a more pronounced effect within the range of 60 to 100 lbf/in2. The increase in efficiency ranged from 3.5 percent at 8.5 r/min to 6.5 percent at 7.5 r/min. Capacity in the performance of the press is the characteristic most affected by changes in speed of the pressing screw. The capacity at a speed of 17.5 r/min dropped from 3,160 to 2,720 lbs/hr. With a speed of 12.5 r/min the capacity fluctuated between 1,800 and 1,700 lbs/hr, and at 8.5 r/min it was about 1,300 lbs/hr. The recommended set of conditions to extract coconut milk using this type of continuous screw-press are a speed of 17.5 r/min and a pressure of 100 lbs on the creeping cone, when working with comminute material from a hammer mill with a No. 4 screen (10 1/4-in perforations/in2).

scholarly journals The Mechanically Extraction Process of Gambier (Uncaria gambier Roxb.) from Limapuluh Kota, West Sumatera and Its Antioxidant activity

2020 ◽  
Vol 9 (1) ◽  
pp. 8-15
Author(s):  
Galuh Widiyarti ◽  
◽  
Andini Sundowo ◽  
Euis Filailla ◽  
Joddy Arya Laksmono ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Trace Amount ◽  
Extraction Process ◽  
Activity Analysis ◽  
Hydraulic Press ◽  
Screw Press ◽  
Ic50 Value ◽  
Dpph Method ◽  
Twin Screw ◽  
Water Contents

The extraction process from leaves and twigs of gambier (Uncaria gambier Roxb)plant was conducted mechanically by using traditional hydraulic press, conventional screw press, and modified twin-screw press. The leaves and twigs of gambier plant was obtained from traditional farmer in Limapuluh Kota, West Sumatera, Indonesia. The water, ash and catechin contents of the gambier extracts were analyzed based on SNI 01-3391-2000 using spectrophotometry and thermogravimetry method. Antioxidant activity analysis of the extracts was also performed by 1,1-diphenyl-2-picrylhidrazyl (DPPH) method and compared tovitamin C as a standard antioxidant. The analysis results showed that the extracts contain no ash. Meanwhile, the catechin and water contents of the extracts were approximately 50 and 13% thus the extracts were classified as quality gambier 2. Other than that, analysis result of catechin and epicatechin contents of the extracts using HPLC and compared to the reference materials showed that catechins contents of the extracts using traditional hydraulic press, conventionalscrew press, and modified twin-screw press give catechin content in about 94.296-95.030%. However, epicatechin was detected in a trace amount. The antioxidant activity of the extracts were 2.5 times stronger than reference. The IC50 value of 4.37-4.52 µg/mL and was categorized as active antioxidant.

Multiple Stage Pressing

1983 ◽  
Author(s):  
Ralph W. Cook
Keyword(s):  
Press Cake ◽  
Screw Press ◽  
Roller Press ◽  
The Press ◽  
Horizontal Roller

The first citrus feed mills built in Florida used Louisville or Davenport presses. The Louisville press was a horizontal roller press. The Davenport press used two flat perforated cones. These presses had several problems in common, the edges of the peel mass did not get pressed much and the pressure was released before discharging the press cake, giving reabsorption of the press liquor. Most of the installations changed to vertical or horizontal screw press by 1960. Since then, there has been only modest improvements. Paper published with permission.

scholarly journals Whole or Defatted Sesame Seeds (Sesamum indicum L.)? The Effect of Cold Pressing on Oil and Cake Quality

Foods ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 2108
Author(s):  
Diana Melo ◽  
Manuel Álvarez-Ortí ◽  
Maria Antónia Nunes ◽  
Anabela S. G. Costa ◽  
Susana Machado ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Unsaturated Fatty Acids ◽  
Press Cake ◽  
Essential Fatty Acids ◽  
Fatty Acid Pattern ◽  
Essential Amino Acids ◽  
Extraction Process ◽  
Cold Pressing ◽  
Sesame Seeds ◽  
The Press

Whole sesame seeds and sesame oil, which is obtained after cold pressing the seeds, are foodstuffs globally consumed due to their nutritional characteristics. The press cake that remains from the oil extraction process can be ground to form a defatted flour that can be incorporated into the human diet, contributing to the valorisation of this product. The nutritional comparison between the whole seeds and the press cake reveals the potential of this by-product to be incorporated in the formulation of diverse foodstuff, since it is richer than the seeds in proteins (30%) and fibre (25%) and still contains a proportion of oil (32%) with a fatty acid pattern characterized by the abundance of unsaturated fatty acids. The protein fraction of both the seeds and the cake shows a balanced composition regarding amino acid composition, with all the essential amino acids included. On the other hand, the oil obtained by cold pressing is shown as a high-quality oil, where the predominant fatty acids are oleic (42.66%) and linoleic (41.25%), which are essential fatty acids because they are not synthetised in the organism and must be obtained through the diet. In addition, it is rich in vitamin E, especially in γ-tocopherol, that was the main isomer found. Regarding these results, all products (sesame seeds, oil and press cake) are components suitable to be included in a healthy diet.

scholarly journals Effect of the Amount of Water on the Extraction of Coconut Milk at Two Temperature Ranges

1969 ◽  
Vol 55 (2) ◽  
pp. 167-173
Author(s):  
L. E. Cancel ◽  
J. M. Rivera-Ortiz ◽  
M. Santos-Sánchez
Keyword(s):  
Cold Water ◽  
Press Cake ◽  
Fat Content ◽  
Hot Water ◽  
Coconut Milk ◽  
Water Addition ◽  
The Press ◽  
Percentage Yield ◽  
Temperature Ranges ◽  
Two Temperature

Studies were conducted on the extraction of coconut milk. Cold water (80° to 86° F.) and hot water (190° to 200° F.) was added to the coconut pulp in different proportions by weight. Water-addition tests were made, the ratio of water to pulp varied from 0:4 to 4:4 by weight. The results indicate that a gradual increase occurs in the percentage-yield of coconut milk as the ratio of water to pulp is increased from 0:4 to 4:4. The data shows that when the coconut milk is extracted using equal weights of water and coconut pulp (4:4 ratio), the yield is 8 to 10 percent higher than when no water is added (0:4 ratio). The results obtained from the use of cold water as compared with hot water were about the same. Chemical analyses of the coconut milk show that the fat content of both extracts is very similar with either hot or cold water. The same observation was made concerning the fat content of the press-cake.

scholarly journals Analysis Of Oil Losses at Press Station In PT. Palmina Utama

2021 ◽  
Vol 6 (02) ◽  
pp. 37-41
Author(s):  
Syamsul Rizal ◽  
Linda Rahmawati
Keyword(s):  
Statistical Analysis ◽  
Direct Observation ◽  
Palm Oil ◽  
Extraction Process ◽  
Screw Press ◽  
The Press ◽  
Observation Method ◽  
The Right ◽  
Main Station ◽  
Direct Observation Method

The press station is the main station for quoting oil from the pulp of palm oil (CPO). In the screw press, there are several things that need to be considered in order to determine the success of the extraction process, namely the percentage level of oil losses which is one of the benchmarks for the success of extraction at the press station. Some things that can affect the percentage level of oil losses at the press station are the amount of pressure on the press machine and the level of chopping blades in the digester. This observation is carried out by direct observation method at PT. Palmina Utama, using a purposive sampling method.samples taken for the analysis of oil losses at this press station are in the form of fiber, the persentage value of oil losses is determined by exstraction using soxhlet with n-hexane solvent. Samples for analysis were taken from five press machines at the press station in the form of fiber and taken three times each at three points, namely the left side, the middle side and the right side with an interval of two hours, then the samples were mixed and weighed as much as nine to ten gram. The highest oil losses in February were 4.48% and the lowest losses during February were 4.105%. Based on statistical analysis, that F-Count is smaller than F-table 5% and 1%. Thus, pressure does not affect at the percentage of oil losses.

Selection of the optimal hydraulic drive for the press

2021 ◽  
pp. 50-60
Author(s):  
A.A. Antsifirov ◽  
V.A. Krivoshein
Keyword(s):  
Technological Process ◽  
Electric Motor ◽  
Software Package ◽  
Hydraulic Drive ◽  
Hydraulic Press ◽  
Topological Model ◽  
Electric Motors ◽  
Engine Operation ◽  
The Press ◽  
Selection Of

The research presented in the article is devoted to the selection of the electric motor of the hydraulic press drive with a nominal force of 5MN. The article presents the main characteristics and the description of the press operation using the means of mechanization of the technological process of pressure treatment. Using the Deform-3D software package, the process of stamping the crosspiece of the ZIL-130 cardan shaft was simulated. Based on the presented hydraulic scheme of the press, its topological model was formed in the PA-9 software package. The deformation force obtained in the course of modeling the technological process of stamping was used in the topological model of the press. Using a tabular cyclogram, the sequence of actuation of the end switches and hydraulic distributors during the stamping process is shown. In the article, two variants of engine operation were analyzed. Based on the results of the conducted research, it is necessary to focus on the second version of the 55 kW engine, the operation of which will provide the required characteristics of the hydraulic drive of the press, which in turn will allow for technological stamping operations. The simulation tools allow providing estimated information when selecting the necessary tools to ensure the optimal characteristics of hydraulic press drives. The article considered the variation of electric motors that differ from each other in nominal characteristics, with constant characteristics of the pump. For more accurate estimates of energy savings during the operation of the hydraulic drive, it is necessary to vary the characteristics of the pump in the simulation, and the best option is to form an experiment planning matrix when combining the characteristics of the electric motor and the hydraulic pump. This approach ultimately allows forming a function for which one can select a hydraulic drive from existing brands of electric motors and hydraulic pumps for presses of the corresponding range of nominal force.

IMPROVEMENT OF THE PROCESS OF OPERATION OF THE GUIDE MOVING CROSSBARS OF HYDRAULIC PRESSES

2020 ◽  
Author(s):  
K.O. Kobzev ◽  
◽  
S.A. Vyalov ◽  
E.S. Bozhko ◽  
I.A. Zolotuhina ◽  
...  
Keyword(s):  
Service Life ◽  
Hydraulic Press ◽  
Operating Conditions ◽  
The Press ◽  
Technical Solutions

This article deals with the problem of operating conditions of guide moving crossbars of hydraulic presses. Based on the study of hydraulic press operation processes, the need to develop and implement measures to ensure reliable and trouble-free operation of the press was identified. The conclusion justifies the idea that if these technical solutions are implemented, the service life of hydraulic presses will increase

A Coupled Temperature-Displacement Numerical Analysis of Hydraulic Press Workspace

2016 ◽  
Author(s):  
Jakub Jirasko ◽  
Antonin Max ◽  
Radek Kottner
Keyword(s):  
Numerical Analysis ◽  
Computational Model ◽  
Automotive Industry ◽  
Elevated Temperatures ◽  
Compressive Force ◽  
Hydraulic Press ◽  
Metallic Materials ◽  
Pressing Force ◽  
Stress Criterion ◽  
The Press

The analysis is performed on a hydraulic press which is intended for use in the automotive industry and is a part of a production line. The final phase of manufacture of interior and acoustic parts takes place in this press. These interior and acoustic parts are made of sandwich fabric which is inserted into the heated mould of the press and by treatment with a defined pressure (or, more precisely, a defined compression) and temperature, it is formed into its final shape. This press has a frame with four columns and it is not preloaded. Two double acting hydraulic cylinders placed on an upper cross beam exert the compressive force. Due to continuously increasing demands on the accuracy and quality of products not only in the automotive industry, it is necessary to ensure compliance with the accuracy of certain values of machine operation. Especially in this case, the value of accuracy substantially depends on the clamping plates of the press, for which a certain value of flatness is required, both at room temperature and at elevated temperatures. To achieve this accuracy, it is necessary to guarantee sufficient stiffness of the machine to resist the pressing force with the smallest deformation possible. Another crucial factor affecting the accuracy of the machine is heating of the heated clamping plates. Unequal heating of parts of the frame causes additional deformation that has to be quantified and eliminated. The main aim was to verify the design of the press by numerical computation and gather knowledge for modifying the topological design of the press so that it fulfils the required customer parameters of flatness and parallelism for different types of loading. A computational model of the press was created for the numerical solution of a coupled temperature-displacement numerical analysis. The analysis was performed using the finite element method in Abaqus software. The press is symmetrical in two orthogonal planes and the load of the press is considered to be centric. On the basis of these two factors it was possible to carry out the analysis by considering only a quarter of the press. The analysis was used to investigate the effects of static and combined loads from the pressing force and heat on the press. The influence of a cooling circuit located in the press frame for the reduction of frame deformation (and deformation of clamping plates) was investigated. Contacts were defined among individual parts to ensure the computational model had characteristics as close as possible to the real press. The analysis was solved as stationary, on the basis that the cooling of the tool between individual pressing cycles is negligible. The insulating plates are made of a particulate composite material which was considered to have isotropic properties depending on the temperature. For strength evaluation of composite materials all individual components of the stress tensor were examined according to the maximum stress criterion. Hook’s law was considered to be valid for the metallic materials. Von Mises criterion was used to evaluate the strength of the metallic materials. The geometry of the press was discretized using 3D linear thermally coupled brick elements with 8 nodes and full integration (C3D8T). There were approximately 174,000 elements in total. Design procedures for designing a press frame with higher work accuracy (flatness) were proposed with the example of the simplified model of the press table. With these methods it is possible to achieve times higher accuracy than is achieved with conventional method.

Design and Manufacturing of Cylinder-Beam Integrated Hydraulic Press

2013 ◽  
Vol 397-400 ◽  
pp. 157-161
Author(s):  
Wei Wei Zhang ◽  
Xiao Song Wang ◽  
Shi Jian Yuan ◽  
Zhong Ren Wang
Keyword(s):  
Driving Force ◽  
Geometric Dimension ◽  
Hydraulic Cylinder ◽  
Hydraulic Press ◽  
Force Distribution ◽  
Section Modulus ◽  
The Press ◽  
The World ◽  
Design And Manufacturing ◽  
Institute Of Technology

For a cylinder-beam integrated hydraulic press (CBIHP), the hydraulic cylinder is also functioned as an upper beam. It is the key structural component that outputs the driving force to forge parts. Compared with the traditional three-beam and four-column hydraulic press which has a cylindrical hydraulic cylinder, the structure and force distribution are significantly different for CBIHP. It is able to have higher nominal force and larger section of plunger which the pressure is applied on when the contour geometric dimension is the same. Also, CBIHP has lighter weight and larger section modulus when the nominal force is the same than the traditional hydraulic press. Finally, a 6300KN cylinder-beam integrated hydraulic press, which is the first CBIHP in the world and designed by Harbin Institute of Technology (HIT) in 2012, is also introduced in this paper. It can be seen from the results of numerical simulation for the CBIHP that both of the stresses and displacements on the press in the loading process are allowable.

scholarly journals OIL LOSSES PADA FIBRE FROM PRESS CAKE DI PT. AMP PLANTATION UNIT POM

2021 ◽  
Vol 3 (1) ◽  
pp. 234-239
Author(s):  
Kushisa Atta Jaeba ◽  
Ega Tridiah Lestari ◽  
Muhammad Ilham Adelino
Keyword(s):  
Press Cake ◽  
Screw Press

PT.AMP Plantation Unit POM yang merupakan salah satu perusahaan dalam mengolah tandan buah segar yang berada di Desa Tapian Kandis, Kabupaten Agam, Sumatra Barat. Proses press, merupakan tahapan penting didalam tahapan produksi untuk memperoleh CPO. Proses ini memisahkan minyak dari daging buah, fibre dan nut dengan pengendalian standar kualitas berdasarkan oil losses. Hasil persentase beberapa parameter oil losses pada 20 Juli–19 September 2020 memperlihatkan bahwa fibre from press cake memiliki persentase paling tinggi yaitu 38,01% sedangkan persentase parameter paling rendah adalah shell of nut from press cake yaitu 2,84%. Oleh karena itu diperlukannya tindakan dari perusahaan dalam meminimalisir terjadinya oil losses pada fibre from press cake yaitu untuk analis laboratorium akan melakukan pengecekan setiap 2 jam sekali dengan menggunakan alat Nir Foss. Beberapa tindakan yang dilakukan operator pressing adalah memeriksa Digester, memeriksa panel elektrik, memeriksa Screw Press dan memastikan ke operator sterilizer lama perebusan tandan buah segar.  

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