Reliability and maintainability analysis to improve the operation of the limoncello production line

The reliability, maintainability, failure rate and repair rate models of a limoncello automated production line for a period of 8 months at machine and entire line level were carried out. It was pointed out that (i) the real operating time of the limoncello production line (LPL) is 89.35%, whereas for the rest 10.65%, the LPL is under repair, (ii) the Weibull distribution provided the best fit of the failure data for the LPL to describe the time‐between‐failures (TBFs), whereas the time‐to‐repairs (TTRs) are lognormal distributed, and (iii) the failure rate of the production line increases, implying that the current maintenance strategy is not adequate and must be improved. This particular methodology can also be utilised in the beverage industry sector by the machinery manufacturers and the manufacturers of bottled products to improve the design and operation management of the bottling production line.     

一线双用钢丝热镀锌生产工艺及设备改进

为了能在一条热镀锌生产线上同时生产架空绞线用镀锌钢丝及铠装电缆用热镀锌低碳钢丝,对现有工艺和生产设备做出改进:(1)铠装电缆用热镀锌低碳钢丝离线退火,架空绞线用镀锌钢丝在线脱脂;(2)采用陶瓷材质固定式压线辊;(3)铠装电缆用热镀锌低碳钢丝增加阻力调节装置;(4)选用镍铬-考铜热电偶对退火炉的测温仪器进行改进,测温点位于退火炉的中部。通过上述工艺及设备改进,生产的Ф1.6 mm铠装电缆用钢丝锌层面质量153～178 g/m2,抗拉强度375～440 MPa,扭转40～53次;2.25～2.75 mm绞线用钢丝锌层面质量237～269g/m2,抗拉强度1390～1570 MPa,扭转22～30次,均满足GB/T 3428—2002要求。     

聚酰亚胺短纤维湿法纺丝生产线的开发

简要介绍了聚酰亚胺纤维的性能特点、应用领域、制备方法,以及国内外聚酰亚胺纤维产业的发展现状。结合生产线流程及主要设备参数,对产能为400t/a的聚酰亚胺短纤维湿法纺丝生产线上一些主要机械设备的开发进行了论述,指出了这些设备的结构特征和开发重点。     

1880/150特种纸生产线自控系统设计

总结了1880/150特种纸生产线项目的自动控制系统设计及实施方案。该项目控制系统主要由冷凝水自动排放系统、自动配酸系统、中和水自动控制系统组成,实现了对液位的实时监测与联锁,从而实现对设备的自动控制。。     

中小企业环保工程质量及运行管理的现状及对策建议

在我国社会经济快速发展的背景下,中小型企业对于环保工程质量、运行管理工作的重视程度也随之加深.为了有效提高环保工程质量管理工作,中小型企业必须根据自身的发展情况来做好企业内部的环境污染控制,并始终贯彻环境保护理念,在明确企业发展方向的基础上,积极完善管理运行制度,积极引进先进的工艺.本文根据中小企业环保工程质量、运行管...     

荷叶茶饮料智能化生产线与工艺研发

介绍了荷叶茶饮料智能化生产线流程、主要设备配置以及工艺技术参数。实践表明,按此智能化生产线和工艺流程加工的荷叶茶饮料,其感官品质和各项理化、卫生指标良好,符合现代茶饮料标准。     

浙江省出口葡萄生产管理操作规程

随着葡萄贸易的发展,越来越多的葡萄产品将出口至国外。因此,规范葡萄优质生产管理技术与出口操作流程对于确保葡萄顺利出口具有积极意义。依据GB/T1.1-2009的规则,规定出口葡萄术语、园区管理、建园、栽培管理、病虫鸟害绿色防控、果实采收与运输、包装、出口申报和质量溯源管理等关键环节。适用于浙江省及类似生态区出口葡萄的生产、管理及出境操作。     

Transient analysis to design buffer capacity in dairy filling and packing production lines

In dairy filling and packing lines, due to line unbalance, extra time is required for the upstream filling station with lower production rate to work in advance to build work-in-process so that the downstream packing station can operate at a higher productivity during a shift to achieve the desired production volume. In this paper, we present a study to determine the buffer capacity in such lines through transient analysis. We evaluate the system production rate and work-in-process during transients, the necessary extra time of the filling station, the system operating time, and the blockage and starvation of the filling and packing stations, respectively, for different buffer capacities. In addition, we investigate the impacts of filling station efficiency and initial inventory on system performance.     

边际贡献理论在钢丝绳生产经营中的应用

运用边际贡献理论,以镀锌钢丝绳生产为例,分析该产品的变动成本和固定成本的测算方法,可知变动成本车间能控制,固定成本车间难以控制,变动成本考核制度比全部成本考核更科学合理;分析产品销售基价的制定方法以及盈亏平衡点的确定方法,推知在任何情况下产品的最低销售价格不得低于单位变动成本,否则就会出现真正意义上的亏本销售。     

浅谈中职服装专业课程的设置--基于工作过程的服装制作与生产管理专业课程体系开发

中职学校的课程体系建设正处于转变模式、建立特色、与时俱进的重要时期,只有围绕地区产业经济的变化进行课程改革,才能适应社会的发展。服装专业的课程设置在中职学校的发展中展示出其不足,例如创新能力欠缺、实践机会较少等,但是也拥有得天独厚的优势,要正视不足,取长补短,根据国外的先进经验进行多方面的改进,促进我国中职服装专业课程更上一层楼。     

Influence of sex and terminal sire line on performance and carcass and meat quality of Iberian pigs reared under intensive production systems

A trial was conducted to study the effects of sex (castrated males; females) and terminal sire line (DD, Danish Duroc; SD, Spanish Duroc; RIB, Retinto Iberian) on performance and carcass and meat quality of pigs slaughtered at 145 kg body weight. The female line was pure Iberian in all cases. Each treatment was replicated five times (six pigs). Females were more efficient, had less carcass and inter- and intramuscular fat and more trimmed primal cuts yield than castrated males. Duroc sired pigs grew faster and had better feed conversion and carcass quality than RIB sired pigs. Crossbreeds from SD had less carcass yield than crossbreeds from DD or RIB. We conclude that productive performance and primal cuts yield were higher for females than for castrated males. Danish Duroc sires are an alternative to Spanish Duroc and Retinto Iberian sires for production of heavy pigs destined for the dry cured industry.     

Modeling,analysis and continuous improvement of food production systems: A case study at a meat shaving and packaging line

In this paper, we introduce a case study at a meat production company to analyze and improve the throughput of a meat shaving and packaging line. An analytical model has been developed and validated by the data collected on the factory floor. The method is based on an iteration procedure using aggregations. It is shown that the model provides an accurate estimation of line throughput comparing with actual production, with difference around 2%. Then, a bottleneck indicator based on probabilities of blockage and starvation has been used to identify and mitigate the bottleneck machine, which is referred to as the machine that impedes system performance in the strongest manner. The MVAC bubble sealer station is the bottleneck of the system, and reduction of its downtime, in particular, the downtime related to film and zipper changes, can lead to a significant improvement of line throughput. Recommendations are provided to the plant management to implement the changes.