瓦楞纸板含水率测定

瓦楞纸板的含水分多少,直接影响到瓦楞纸箱的抗压强度,含水分愈高,抗压强度愈低。GB5034—85出口产品包装用瓦楞纸板国家标准及GB6544—86瓦楞纸板国家标准都明确地规定了瓦楞纸板的含水率,前者为11±3％,后者为14±4％。而且都明确地规定了水分含量的测定方法是按GB462—79     

基于QFD和TRIZ的瓦楞纸板生产线造型设计研究

目的 为了改善瓦楞纸板生产线设备的整体造型,提高操作人员的使用满意度,提出基于QFD和TRIZ的瓦楞纸板生产线创新造型设计方法。方法 通过分析瓦楞纸板生产线设备的设计现状,研究并总结用户需求。构建瓦楞纸板生产线QFD质量屋,获取瓦楞纸板生产线设备设计要素中的技术冲突,得到创新设计方向。继而应用TRIZ的三十九个通用工程参数,表达产品的技术矛盾。对照TRIZ的矛盾矩阵,获得相应TRIZ相关的发明原理,指导产品创新设计。结论 通过综合运用适合的发明原理,对瓦楞纸板生产线的造型、工作安全性、操作舒适性等方面提出了相应冲突解决方案,并将对应的发明原理演绎与具体化,进而输出了可行的瓦楞纸板生产线的造型创新设计方案,并为同类型的包装装备生产线设计提供了参考。     

瓦楞纸板流水线的原纸残卷智能计重系统及装置

目的:研制一种瓦楞纸板生产线原纸残卷智能计重系统及装置。方法:在现有瓦楞纸板生产线上增设自动化控制,在线上动态精确测量原纸使用的长度米数,并计算原纸残卷的重量。结果:为瓦楞纸板生产线配备残卷智能计重系统及装置,将残卷信息对接到企业管理ERP系统,实现原纸的在线管理,在线检测原纸残卷的剩余米数、重量等信息,精确测量原纸实际用量和损耗。结论:对纸箱厂的自动化管理,降本提效具有重要意义。     

汞三相点的研究

叙述了汞三相点密封容器的设计和制作程序，并介绍了具体的复现装置和实验方法。实验结果表明，复现性为±０．１ｍＫ，平均熔化温度与平均凝固温度的差为０．１ｍＫ，不同密封容器间的差小于０．２ｍＫ。     

那些你不得不知的瓦楞纸箱外包装印刷方式

瓦楞纸板的加工工艺主要分为两类,即全自动瓦楞纸板生产线生产工艺和半自动瓦楞纸板生产线生产工艺。全自动瓦楞纸板生产线生产工艺应用得比较广泛,具有生产批量大、纸箱成型体积较大、楞型质量好等优点。该工艺生产出来的瓦楞纸板,通常是通过水性印刷、开槽、粘糊、成型等工序制成纸箱的。以这种工艺生产出的纸箱主要用做运输包装。半自动瓦楞纸板生产线生产工艺是先印刷面纸,再与瓦楞芯纸、纸板进行裱合。     

亚洲首条1800型高速智能化瓦线投产在即

<正>2017年山东省日照市金宝包装制品有限公司投资2000多万元引进意大利阿格纳蒂1800型高速智能化瓦楞纸板生产线,用于生产D型瓦楞纸板。这是阿格纳蒂在亚洲的首条1800型高速智能化瓦楞纸板生产线,项目在微型瓦楞纸方面填补国内空白。8月工作人员与意大利厂家技术人员调试设备,10月份正式投产。该条生产线设计年生产能力1.5亿立方米,预计     

积分球式光亮度标准

中文介绍了所研制的基于积分球的光亮度标准，该装置的亮度示值误差小于１％，其相对光谱功率分布近于Ａ光源，０°～±５０°方向内光亮度偏差小于２．５％。     

浅谈瓦楞纸板塌楞故障处理方法

在瓦楞纸板包装和印刷中，瓦楞纸板塌楞（一般均为局部塌楞）对产品包装质量的影响很大，这种不合格的瓦楞纸板，不但无法确保瓦楞纸箱的抗压强度、环压强度，不能保证包装产品贮运的安全，而且影响整个产品包装外观质量，此外，在包装印刷中也会因塌楞等原因使印刷的图文不清，严重影响产品的销售。由于在瓦楞纸板生产过程中，对瓦楞纸板的技术参数、工艺设计、质量检测等几个方面要求非常严格，生产线结构比较复杂，生产时使用材料和影响质量的因素较多，     

热敏电阻线性化测量温度的应用

为了满足在湿度测控中进行温度补偿的需要，本文介绍应用热敏电阻实现了高精度线性化测温的理论、实际测温电路及应用实验结果，线性化后的误差可小于±０．５％。     

瓦楞纸板生产线施胶对产品质量的影响

<正> 瓦楞纸板生产线施胶对瓦楞纸板的质量起着举足轻重的作用,良好的施胶决定着产品的品质。标准的施胶是施胶位置准确,没有错位现象,粘合剂在整个楞峰上被均匀流畅地上胶,糊胶线轮廓清晰,并且没有粘合剂从瓦楞上横向抛射、没有拖拽的糊胶痕迹。施胶不良主要与瓦楞纸板生产线设备及调     

Insertion of triangulated surfaces into a meccano tetrahedral discretization by means of mesh refinement and optimization procedures

In this paper, we present a new method for inserting several triangulated surfaces into an existing tetrahedral mesh generated by the meccano method. The result is a conformal mesh where each inserted surface is approximated by a set of faces of the final tetrahedral mesh. First, the tetrahedral mesh is refined around the inserted surfaces to capture their geometric features. Second, each immersed surface is approximated by a set of faces from the tetrahedral mesh. Third, following a novel approach, the nodes of the approximated surfaces are mapped to the corresponding immersed surface. Fourth, we untangle and smooth the mesh by optimizing a regularized shape distortion measure for tetrahedral elements in which we move all the nodes of the mesh, restricting the movement of the edge and surface nodes along the corresponding entity they belong to. The refining process allows approximating the immersed surface for any initial meccano tetrahedral mesh. Moreover, the proposed projection method avoids computational expensive geometric projections. Finally, the applied simultaneous untangling and smoothing process delivers a high‐quality mesh and ensures that the immersed surfaces are interpolated. Several examples are presented to assess the properties of the proposed method.     

Certification Institutions Expected to Update and Transfer Information on Present Standards

Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.……     

Flow calorimeter for enthalpy increment measurements on condensed gases

A flow calorimeter for enthalpy increment measurements on condensed gases is presented. A better knowledge of the properties of the liquefied natural gas is needed, and therefore a liquid loop has been designed for our flow calorimeter. The fluid loop in the calorimeter is designed in order to avoid the two-phase region, since two phases would give compositional disturbances in the measurements. The avoidance of the two-phase region is made possible by increasing the pressure of the test fluid after the measurement section, then heating the fluid at super-critical pressure past the critical point. Finally, the fluid is throttled to the low-pressure gas state at the inlet condition of the compressor that circulates the fluid. To perform the pressure increase, a new cryogenic pump has been designed. To evaluate the new equipment, measurements were taken on liquid ethane over the temperature range 146–256 K at pressure between 0.9 and 5.1 MPa.     

From Industry 4.0 to Research 4.0. Development of High Performance Fibers in the Light of Digitization

We associate a variety of innovations with the term ＂Industry 4.0＂. The pioneer of many 4.0 modifications forms the basisfor the trend towards the integrated di...     

Refrigerators Enter a New Era of Health Preservation Frestech initiates the establishment of China's first standard for household sterilization refrigerators

On November 30, 2007, the China Association for Standardization (CAS) held a press conference at Beijing Diaoyutai State Guest House. Leaders from the China Household Electric Appliance Research Institute, the China Household Electric Appliance Association, and the China Consumers' Association attended and made speeches.……     

Optimum-Simulation von Ernteprozessen

Zusammenfassung Bei der Gestaltung von Ernteprozessen — beispielsweise des Prozesses Mähdrusch, Körnertransport und -abnahme — als transportverbundene Fließarbeitsverfahren mit mindestens zwei verschiedenen Arbeitsmitteln gibt es einen großen Optimierungsspielraum. Solche Prozesse sind mehrstufige Bedienungsprozesse mit gemischter Anordnung der Bedienungseinrichtungen. Außerdem besitzen sie stark ausgeprägte räumliche Aspekte. Es wird vor allem gezeigt, welche Merkmale solcher Prozesse in Simulationsmodellen abgebildet sein müssen, welche Zielgrößen in Abhängigkeit von welchen Einflußgrößen unter Berücksichtigung welcher Prozeßbedingungen ermittelt werden sollten und wie der Bewertungsprozeß zur Ermittlung der gewünschten Informationen gestaltet werden muß.     

Roman iron and steel: A review

ABSTRACT

The production of ferrous metal increased during the Roman Late Republican period, Principate and Empire. The direct bloomery process was used to extract the metal from its ores using slag-tapping and slag-pit furnaces. The fuel was charcoal and an air blast was introduced by bellows-operated tuyères. Iron formed as a bloom, often as a spongy mass of metal, which contained impurities from the smelting process, including unreacted ore, fuel, slag and fragments from the furnace walls, while the metal was often inhomogeneous with varied carbon contents. Blooms were either smithed directly into bars or ingots or they were broken up, which also allowed the removal of gross impurities and a selection of pieces with similar properties to be made. These could then be forge-welded together and formed into characteristically shaped ingots. Making steel in the furnace seems to have been achieved: it depended on the ore and the furnace and conditions within it. Surface carburization was also carried out. Iron and steel were used extensively in construction and for tools and weapons. Fire welding was often used to add pieces of steel to make the edges of tools and weapons, which could be heat-treated by quenching to harden them.     

A study of centrifugal cast high boron high speed steel

In the present study a high‐boron high speed steel (HSS) roll material was designed. Many expensive alloy elements have been substituted by cheap boron alloy, and high‐boron high speed steel roll has been manufactured by centrifugal casting method. The microstructures, mechanical properties and wear resistance of centrifugal casting high‐boron high speed steel roll have been investigated by optical microscopy (OM), scanning electron microscopy (SEM), and X‐ray diffraction (XRD) analysis, hardness test, impact test and wear test. The results indicated that the solidification microstructures of high‐boron high speed steel roll consisted of M₂(B,C), (W,Mo)₂(B,C), M₃(B,C), M₂₃(B,C)₆ type borocarbides and martensite, a small amount of retained austenite. Borocarbides were continuously distributed over the grain boundary. After quenching from 1050 °C, local broken network appeared in partial borocarbides, and fine secondary borocarbide precipitated from the matrix. After tempering from 525 °C, the amount of precipitated borocarbide increased significantly. After heat treatment, the hardness of high‐boron high speed steel roll excelled 60 HRC, and its impact toughness excelled 8.0 J/cm². The single groove steel rolling amount of high‐boron high speed steel rolls increases by 500% than that of bainite cast iron roll, when the rolls are used in K₁ mill housing of bar mill.     

Thixotropy of Systems with Shear Thinning and Plastic Flow Behavior

The definition of the thixotropy is a decrease in viscosity with time in shear and a subsequent recovery of viscosity after the shear deformation is removed.We ...