Operation Of Press Research Articles

Cotton Ginners Handbook – Packaging Lint Cotton

Bale packaging is the final step in processing cotton at the gin. Bale packaging is critical to protecting and preserving the quality of the ginned lint during shipping and storage before consumption at the textile mill. Smooth operation of the bale press and associated systems is required for the efficient operation of the ginning plant. Properly shaped bales are important to the safe and efficient handling and storage of bales. The bale press, condenser, and hydraulic systems must be sized to match the design capacity of the ginning plant in order to maximize capacity. Bale presses may be designed to produce Universal Density bales or High Density bales, although only Universal Density bales are currently approved by USDA. Proper maintenance of the bale press and related systems translates into reduced downtime for the ginning plant. All bale packaging, including the bale covering and strapping or ties, must be approved by the Joint Cotton Industry Bale Packaging Committee in order for the bales to be eligible for collateral in the Commodity Credit Corporation loan program. This manuscript discusses the individual components of a cotton gin bale packaging system and settings to ensure the consistent production of uniform bales of cotton lint.

ПІДТРИМКА ТОЧНОСТІ ЗНАЧЕНЬ КЕРУЮЧИХ ПАРАМЕТРІВ ЕЛЕКТРОГІДРАВЛІЧНОГО НАВАНТАЖЕННЯ ПРИ ШТАМПОВЦІ З ПРОСТОРОВО-ЧАСОВИМ КЕРУВАННЯМ

The article is devoted to ensuring the stability of the technological process of electrohydraulic stamping of thin-sheet large-sized parts. This process is realised on multi-contour EH presses equipped with the capabilities of space-time control of the workpiece load. This control ensures the production of high-quality parts and high technical and economic performance of the process.The control parameters include the geometry of the press energy release zone, the loading sequence of the workpiece sections and the value of the inter-electrode distance. The first parameters change little under specified operating conditions. The third parameter is subject to change over a specified number of discharges due to cavitation and EDM erosion. Violation of the specified value of the interelectrode distance leads to a violation of the energy release mode and its loss.As a result of the experiments, the mechanism of cavitation destruction of the high-voltage insulation of the working electrode was determined and a solution was proposed for the conditions of winding the high-voltage insulation with a glass fibre roving, as well as electrical insulation in the areas adjacent to the discharge zone.Several variants of the design of the end part of the working electrode, which is still directly in the EG discharge zone, were experimentally investigated.The ratio of the duration of the pre-discharge stage to the characteristic time of the discharge circuit was chosen as a criterion parameter of resistance to electrical erosion of the discharge edges. The duration of the pre-discharge stage was determined from the discharge voltage oscillograms.According to the given dependences of the above ratio on the number of discharges, the best design from the considered options was determined.The used value of this ratio for the selected design corresponds to ~ 2500 discharges at a voltage of 20...25 kV. This number of discharges is on average comparable to the operation during five shifts, after which it is necessary to restore the discharge edges of the electrode. To simplify the operations of changing electrodes, we propose a design in which the electrodes are fixed by clamping them with elastic washers.It is concluded that the goal has been achieved: maintaining stable operation of the EG press with high technical and economic indicators of the entire technological process at a given quality of parts manufacturing.It is concluded that the goal has been achieved: maintaining stable operation of the EG press with high technical and economic indicators of the entire technological process at a given quality of parts manufacturing.Objective of the work - is to evaluate the effectiveness of the proposed technical solutions to increase the stability of the working electrodes and simplify their repair and restoration.

A study on fire risk and its mitigation in gravure printing press

The gravure printing process is widely utilized for large-scale, high-quality, multi-colored printing tasks executed at high press speeds. This includes a diverse range of products such as art books, greeting cards, currency, stamps, wallpaper, magazines, and more. This thesis addresses the fire risks associated with gravure printing, acknowledging the use of highly flammable materials and the potential for static charge-related incidents. Despite its prevalence, there is limited research on fire prevention and control in gravure printing. The study employs field observations, stakeholder interviews, and an extensive review of literature on fire risk and control in printing press operations in India. It analyzes the causes of fires using the fire triangle model, emphasizing the role of heat, combustible materials, and oxygen in fire incidents within the printing press environment. The thesis categorizes preventive measures into fire prevention and fire suppression actions, focusing on reducing fire load, static charge mitigation, and implementing firefighting systems. It observes that poor housekeeping, lack of awareness, and inadequate emergency control plans contribute significantly to fire hazards in press facilities. Additionally, the research identifies key factors such as high press temperatures, low humidity, improper storage, and inadequacies in firefighting systems as potential causes of fires. It emphasizes the need for optimal environmental conditions, proper storage practices, and effective firefighting infrastructure within press facilities. The study concludes with comprehensive guidelines for loss prevention and control, including management programs, housekeeping, operator training, pre-emergency planning, preventive maintenance, and plant security. It also addresses safety measures specific to gravure printing presses, such as automatic sprinkler systems, fire hydrant system, carbon dioxide flooding systems, and portable fire extinguishers. In summary, this thesis provides valuable insights into the multifaceted nature of fire risks in gravure printing presses and recommends a holistic approach for effective fire prevention and control.

Impact of indoor air pollutant concentration levels on the health of press operators of printing facilities in Zaria Metropolis, Nigeria

Impact of indoor air pollutant concentration levels on the health of press operators of printing facilities in Zaria Metropolis, Nigeria

Design and Manufacturing of Compound Die

Abstract: The work deals with the development of a combined tool for improvement of a process to be done in piaggio product manufacturing plant. Research work deals with combining two press operations done separately. This operation is done for piaggio battery support bracket, cradle assembly, Bumper cargo. In the first pressing blanking process is done. And in the second operation a hole is pierced in the same product. The objective of research is to develop a tool and process for using a single press for performing dual operation. This is also to reduce downtime, reduce operator fatigue and thereby increase production. Elimination of one operation, one operator and reduction in processing time is also to be achieved.

Design Analysis and Operational Enhancement for Die Press

In the competitive industry of manufacturing, optimizing the efficiency and effectiveness of die press operations is paramount. This abstract explores the critical aspects of design analysis and operational enhancement for die presses, focusing on key elements such as structural integrity, material utilization, and process streamlining. This design analysis helps the metal forming industry improve processes and quality and achieve reduced loss due to injury. Key Words: Loss time Injury, KPI, enhances quality

Abstract 835: Occupational-related exposure to benzene and risk of female genital cancers: Systematic review and meta-analysis

Abstract Purpose: The IARC monograph has classified benzene as a class I carcinogen, as evidenced by its association with hematological malignancies. However, its association with female genital cancers (ovarian, uterine, cervical) has not been characterized. Therefore, a meta-analysis of cohort studies was performed to determine the possible correlation between occupational benzene exposure and the risk of female genital cancers. Methods: A systematic literature review was conducted that identified 7221 relevant publications. A total of 9 cohort studies detailing occupational exposure to benzene and correlated risk of ovarian, uterine, and cervical cancers were retained, and a meta-analysis (using fixed effects model) was performed. PECOS criteria and STROBE guidelines were followed, and the study protocol was registered in the PROSPERO database (Reg. No. 379720). Study quality was assessed using a modified Newcastle-Ottawa scale (NOS). Results: The summary relative risk (RR) for ever-benzene exposure was 1.22 (95% CI=1.03-1.44, I2<0.001%, n=19); corresponding RR results for female genital cancers incidence and mortality were 1.09 (95% CI=0.92-1.29, I2=5.0%, n=17) and 1.69 (95% CI=1.18-2.4, I2<0.001%, n=9), respectively. These findings were confirmed in sub-analyses by geographical area, industry type, publication year, and levels of benzene exposure. Heterogeneity was detected amongst industries of employment (p-het=0.012) which included petroleum, chemical, printing, and mixed industries categories. Notably, the printing industry (compositors, press operators, and bookbinders) had a summary RR of 2.56 (95% CI=1.45-4.52, I2=35.0%, n=2). However, no heterogeneity was observed for geographical regions (p-het=0.77), duration of benzene exposure (p-het=0.73), publication year (p-het=0.89), or among varying study quality (< or ≥ median NOS score; p-het=0.14). No publication bias was detected (p=0.43). Conclusions: Our meta-analysis identified an association between occupational benzene exposure and the risk of female genital cancers. The association was restricted to the industry of employment. Effects of residual confounding variables cannot be excluded, however, given the present association, there is a potential for causality, especially in workers employed in the printing industry. Citation Format: Darshi Shah, Vincent DeStefano, Veer Shah, Monireh Sadat Seyyedsalehi, Mattia Bonetti, Paolo Boffetta. Occupational-related exposure to benzene and risk of female genital cancers: Systematic review and meta-analysis [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2024; Part 1 (Regular Abstracts); 2024 Apr 5-10; San Diego, CA. Philadelphia (PA): AACR; Cancer Res 2024;84(6_Suppl):Abstract nr 835.

DETERMINING THE WEIGHT OF OIL EXTRACTED WITH A SCREW PRESS USING A STRAIN GAUGE SENSOR, HX711 MODULE, AND ARDUINO

This research presents an automated system for quantifying oil extracted from a screw press, leveraging a strain gauge sensor and HX711 module in synergy with the Arduino platform. This innovative setup measures the target mass of extracted oil, wherein the collected data is further processed by an Arduino microcontroller. User-defined measurement parameters, such as specific oil mass, dictate when the system terminates the screw press operation. Hitting the set oil mass triggers the Arduino microcontroller to halt the press, allowing for the conservation of raw materials and energy, and consequently ensuring product quality consistency. Conversely, if the desired mass value remains unreached, the extraction continues until fulfillment of target outcomes. This approach optimizes press use, manifesting in maximum efficiency and selectivity in the production process. It demonstrates how such a control system can automate measurement and production supervision, thus fostering optimal screw press operation. The article suggests the solution for integrating Arduino, HX711 module, and strain gauge sensor to measure the weight of the oil extracted through the screw press. The strain gauge and HX711 module were programmed within the Arduino Integrated Development Environment, enabling the accurate measurement of extracted oil mass and data transference to the Arduino controller. A housing bracket 3D model for the strain gauge and HX711 module within the existing screw press was also created using 3D modelling and subsequently printed and implemented. This aids reliable sensor fitting and ensures system stability for oil mass measurement. This study demonstrates the potential for implementing this advancement within pre-existing press infrastructures with minimal changes. Our methodology offers prospective enhancements in quality and efficiency, notably within the oil production domain.

Analysis of the oil extraction process and prospects of automation of screw press operation

Over the last few years, vegetable oils have become an integral food part of the vast majority of the planet's population. In order to preserve all valuable substances in vegetable oils, it is necessary to correctly choose the rational parameters of the oil extraction process. The main purpose of this research is to analyze the influence of various factors on the quantitative and force parameters of the oil extraction process and substantiate the prospective directions of automation of the screw press operation. The research methodology is focused on mathematical modeling of the pressing process and analyzing the stress-strain characteristics of the pressed material (sunflower seeds and cake) at different operational conditions and design parameters of the screw. The obtained results are presented in the form of analytical dependencies of the press output (productivity), extraction pressure, and consumed power on the screw rotational frequency and screw flight pitch. The corresponding graphical dependencies are plotted for visualization of the obtained results with reference to the existing household press LiangTai LTP200. The conclusions on the prospective directions of automation of the screw press operation are drawn. Particularly, the necessity of regulating the temperature of the pressing chamber and extracted oil by means of applying additional heating and cooling devices is substantiated. As well, the sensors that monitor the mass of the extracted oil and the consumed current of the electric motor are proposed to be installed. The rotational frequency of the screw is suggested to be adjustable by applying the frequency converter controlled by the additional electronic system based on the data obtained from the sensors. The paper may be used by scientists and engineers working on designing screw presses and improvement of their performance characteristics. Further investigations on the subject of this research may be focused on experimental verification of the qualitative and quantitative parameters of the extracted oil depending on the type of the seeds or kernels to be pressed, and operational parameters of the press (screw rotation frequency, temperature of the pressing chamber, etc.).

Research on the Operation and Development of Gold Wall Press’s WeChat Public Account “Confidentiality Views”

Research on the Operation and Development of Gold Wall Press’s WeChat Public Account “Confidentiality Views”

Assessment of working conditions and features of respiratory disorders in modern refractory manufacturing

Introduction. Broad prospects for development of refractory manufacturing in Russia necessitate studies of the work environment, especially of the indoor air quality, and respiratory health effects of adverse occupational factors. 
 The purpose of our study was to conduct a general hygienic assessment of working conditions of the core personnel engaged in contemporary refractory manufacturing for more than 10 years and establish their respiratory functional status.
 Materials and methods. We assessed working conditions of press operators of a Ural refractory manufacturing plant in compliance with Russian Guidelines 
 R 2.2.2006–05. The respiratory functional status was established by the results of clinical instrumental testing of refractory production workers who were examined and/or treated at the occupational health clinic of the Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers 
 in 2015–2021.
 Results. We gave a general assessment of working conditions of press operators engaged in the production of spinel periclase-carbon and fireclay-dinas molded refractories in the first refractory workshop, aluminosilicate refractories at the molding site, and corundum-graphite products in the second refractory workshop. 
 We analyzed the results of instrumental testing and established characteristics of clinical disorders of the respiratory system.
 Limitations. The study has regional (Sverdlovsk Region) and occupational (workers of a refractory manufacturing plant) limitations.
 Conclusion. Occupational risk factors for refractory production workers include silica-containing aerosols, which levels exceed maximum allowable concentrations (Class 3.1), aerosols of disintegration of aluminum oxides (in refractory workshop No. 2), iron in concentrations below MACs (Class 2), higher concentrations of volatile products of phenol formaldehyde resins (Class 3.1 in terms of phenol and up to 3.4 in terms of formaldehyde), increased noise levels for all jobs (Class 3.2), and heavy physical labour (Classes 3.1–3.3). Features of clinical respiratory disorders in the core personnel (press operators) were scarcity of complaints and physical data, absence of pronounced coniotic (respirable dust-related) X-ray findings and inflammatory (septic and allergic) blood changes. Moderate obstructive airway disorders were observed in 30 % of the examined cases.

Correction: Fränkle et al. Iron Ore Tailings Dewatering: Measurement of Adhesion and Cohesion for Filter Press Operation. Sustainability 2022, 14, 3424

The authors would like to make the following corrections about the published paper [...]

Assessment of the lung tissue fibrosis in workers exposed to silica-hazardous dust for a long time

Introduction. Silicosis is the most common and severe type of pneumoconiosis caused by inhalation of dust containing more than 10% of crystalline silica in the occupational setting. The chest X-ray plays a decisive role in the diagnosis of the disease.
 The purpose of our work was to establish lung tissue fibrosis in industrial workers suffering from silicosis.
 Materials and methods. In 2015–2022, ten patients with silicosis, employed at a Ural refractory manufacturing plant as press operators (Group 1) for the average of 17.23 ± 4.31 years, were examined at the Occupational Health Clinic of the Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers. The comparison group (Group 2) included 34 press operators without pneumoconiosis who had worked for more than 10 years in hazardous working conditions. The control group (Group 3) consisted of 32 people of different occupations unexposed to industrial dusts. All the subjects were matched by gender (male) and age (50.7 ± 5.25 years). Lung tissue fibrosis was measured by multislice computed tomography using a GE OPTIMA 660 128 Slice CT Scanner with accessories, GE HealthCare Japan, manufactured in 2012. The data were then analyzed in Statistica for Windows 7.
 Results. We established a decrease in tissue fibrosis in the apexes and inferior lobes of both lungs and an increase in the fibrosis in groups of target lymph nodes (11–14R, 2L, 10L) in the silicosis cases, and an increase in Hounsfield units in target groups of lymph nodes (2R, 4R, 10R, 11–14R, 2L, 11–14L) in the comparison group.
 Limitations. The study includes only workers engaged in refractory manufacturing with over 10 years of exposure to silica. For CT lung densitometry, the limitation is the permissible radiation dose of less than 5 mSv per year.
 Conclusion. The results of CT densitometry of the lungs and targeted groups of lymph nodes demonstrate its high efficiency in the quantitative assessment 
 of dust-related disorders in patients with silicosis and in experienced workers occupationally exposed to crystalline silica.

Implications of Case Resolution Mechanism Due to Press Coverage through Non-Litigation Channels

Today's news development in the media is very rapid, both traditional and electronic. Following technological developments, people can receive news from media worldwide directly through various means such as television, radio, newspapers, and even the Internet. Therefore, as a democratic country, Indonesia must be able to fulfill its obligation to guarantee press freedom and encourage the press to serve the interests of the public in seeking information. The national press appears increasingly free and unlimited in today's information technology era. For example, news considered harmful by a particular person or group can cause friction between the press and the public, giving rise to disputes over the behavior of press operators and news considered detrimental by certain groups. All disputes can be resolved through arbitration procedures stipulated in Law No. 40 of 1999 (from now on referred to as the Press Law) through mediation through non-judicial channels. However, not all disputes resolved in such a way can satisfy the parties and create legal certainty.

Design and optimization of press slider with steel-aluminum composite bionic sandwich structure for energy saving

During the operation of a power press, the movement of moving parts consumes large amounts of energy. Minimizing the mass of moving parts through lightweight design is considered an effective strategy to reduce this energy consumption. The slider has the largest mass among moving parts and is the best object for lightweight design. Therefore, this paper proposes a lightweight design and structural optimization method for the slider to reduce the energy consumption of the power press. The reduction in mass of the slider is achieved through the application of a novel steel-aluminum composite (steel face sheets, high-strength aluminum alloy core) bionic sandwich structure (SACBSS). Afterward, the performance of the SACBSS is evaluated, and the SACBSS slider is designed. The energy consumption model and the finite element model of the slider are established, respectively. Finally, the response surface method is used to establish the optimization model by comprehensively considering energy consumption and structural performance. The results show that compared to the referenced steel slider, the optimized SACBSS slider reduces the mass by 18.9% and the energy consumption by 6.1%. The proposed design and optimization method of the slider can effectively reduce energy consumption while ensuring performance, which is important for the realization of green production in factories.

Investigation of constructive and technological parameters of an energy-efficient screw oil press

The article presents the investigation of constructive and technological parameters of an energy-efficient screw oil press. It is outlined the principle of operation of an energy-efficient screw oil press. The construction of the oil press is improved by the steam atomizer that is installed in the receiving hopper under the rifled rollers for moisture-thermal treatment with steam, which is completed with the heat exchanger, heating element, expansion tank and hydro group. Also, a steam generator connected to a steam atomizer which is embodied into the receiving hopper. It was analyzed the influence of the optimization criteria (oil yield, energy consumption and press productivity) on the efficiency of the technological process. These optimization criteria depend on the main independent factors: the length of the reception and preparation chamber, the material (sunflower pulp) moisture; the heating temperature, the screw rotation speed, the linear speed of movement of screw shaft turns. The optimal constructive and technological parameters of energy-efficient screw oil press are considered. The energy-efficient screw oil press refers to the equipment of the oil enterprises of small productivity and due to its design, it allows to use a simple technological scheme of oil pressing and to reduce the amount of energy and resources spent on the technological process in the context of use in sustainable food systems.

Keeping Pace With Changing Demands

Alpine Tools meets requirements for its in-house press operations and subcontractors; Premier Precision Tooling gets in pole position with new investment; MatOrtho boosts production with latest technology; and Mechlam Precision Tooling Ltd increases and improves its capacity and capabilities

Printing Press Operator and Publisher: The Misconception of Graphic Design Students in Technical Universities in Ghana

The study concerned itself with the exploration of the misconception held by Graphic Design students in Technical Universities, with particular emphasis on Takoradi Technical University (TTU) and, to some extent, by some Graphic Arts/Printing Press Practitioners in Ghana that a printing press operator (a printer) and a publisher are the same in meaning and work or can be used interchangeably to connote same. The objectives of the study were to: 
 
 Identify who a printing press operator and a publisher is; 
 Find out the differences between a printing press operator and that of a publisher, 
 Draw the workflow chart of a printing press operator and a publisher, and 
 Draw conclusions based on the prospects of changing the misconception narrative among Graphic Design students in Technical Universities and some Graphic Arts/Printing Press Practitioners in Ghana 
 
 The study was carried out at the Department of Graphic Design Technology, Faculty of Applied Arts and Technology (FAAT), TTU, in Ghana. An expert purposive sampling technique was adopted. The research design employed was a qualitative research approach since the nature of the study required heavy reliance upon extensive observation, document reviews, verbal data from Graphic Arts/Printing Press Practitioners, course lecturers, experts well-versed in the printing press and publishing activities, and Graphic Design students that resulted in non-numerical data. Data for the study were gathered from two main sources: 
 
 Primary – through interaction and observation sources, and 
 Secondary – through literary sources
 
 Content analysis and descriptive analyses were employed to present and analyze the data. The study recommended that adequate information in relation to who a printing press operator and a publisher are and what their individual workflow and activities are should be inculcated in the Graphic Design programme being run and pursued at the Technical Universities to eradicate that deep-seated misconception held by Graphic Design students.

Multistage Optimization of Occupational Safety for Cotton Fabric Screen Printing Press Operators

ABSTRACT The aim of this article is to conduct an analysis leading to the optimization of industrial safety related to the use of a cotton fabric automatic screen printing press. The author’s multistage algorithm, i.e., the analysis-synthesis-minimization procedure, brings effective solutions to the issue in question. There are several risk factors at the printing press workstation and its environment, which are identified by employee surveys, scorecards and airborne samples testing. The risks are visualized by the fishbone/Ishikawa diagram. In accordance with the Fine–Kinney method, a set of 70 scorecards assessing occupational risk is applied to support the identification of critical hazards, which is next re-analyzed using the Analytic Hierarchy Process (AHP). Hierarchically assessed risk factors related to the use of a printing press are easy to be minimized by organizational and technical solutions which are intended to be implemented at the workplace.

Composite collaborative acoustic metamaterials: Isolating shaft vibration of guide roller in printing machine

During the operation of the unit type gravure press, the violent mechanical vibration generated by the guide roller will seriously affect the stability of the unit operation, and causing transmission faults such as wrinkle, offset, scratch or fracture, and reducing the printing accuracy. To this problem, a novel multi-approach composite collaborative vibration isolator which combines the local resonator and multi-layer composite structure is proposed to solve the problems of vibration suppression in the single frequency and vibration energy dissipation in the full frequency band, respectively, and the theoretical model on the proposed isolator is established basing on dynamic stiffness method. For demonstrating isolation performance, the regularized normalized modal displacement, power loss density, elastic strain energy density, total kinetic energy, and vibration transmission ratio can be discussed. The results show that the composite vibration isolator has a wide vibration isolation band, and the vibration wave has two attenuation bands within 0–2000 Hz. The first attenuation band is 188–224 Hz and the width is 36 Hz; the second attenuation band is greater than 328 Hz. When the band of the vibration isolator is above 700 Hz, the vibration transmission ratio shows a monotonous decreasing trend. Furthermore, an experimental platform for the vibration isolation device of the guide roller is established to verify the vibration isolation performance. When the drive motor frequency is 20 Hz, the composite vibration isolator has the best vibration isolation effect. At the same time, the vibration isolation effect gradually decreases with the increase of the guide roller speed, but it still has preferable vibration isolation performance under various working conditions.