卧式成型机塑料泡沫模具

本实用新型公开了一种卧式成型机塑料泡沫模具。其改进在于：在静模体2的外侧表面上，设有进料管1与静模体2和动模体4对合构成的模腔3相连通。实现了既可加工较小规格尺寸或超薄、异型塑料泡沫构件，又可充分利用模具的中心闲置部位设置模腔，提高了塑料泡沫构件一次加工成型的数量；同时，因改变了构件脱模的方向，消除了构件在脱模时的撕裂现象，构件合格率提高。经测试，同原有模具相比，综合提高生产效率2~3倍(专利号 ZL00248507.9)。 RP-03摘自《实用新型专利公报》，第17卷第32号 卧式成型机塑料泡沫模具…     

拉伸工字型截面管中心对称裂纹应力强度因子

异型管作为建筑,化工等领域的基本构件,其安全性一直以来是人们的关注焦点,而大多数异型管的破坏源于裂纹.应力强度因子作为研究断裂的基本参数,其计算方法的研究具有重要意义.以工字型截面管中心对称裂纹为例,运用J2积分以及梁的变形理论,构建其在拉伸载荷作用下的应力强度因子.     

异种陶瓷的坯体无压连接

先进陶瓷的坯体连接技术提供了一种获得以现有的技术难以成型的陶瓷构件的制造方法,其工艺简单,只需将陶瓷料浆敷于需要连接的陶瓷坯体表面,把他们像”三明治”那样连接在一起共同烧结。异种属性陶瓷的连接,还可以使不同部位陶瓷适用各种具体环境条件的要求,对制造大异型和陶瓷构件的多功能化都具有重要意义。     

聚乙烯热收缩异型套管的研制

对聚乙烯热收缩异型套管的成型工艺进行了研究，考察了各种成型因素对制品的影响。发现注塑、辐射交联的热收缩异型套管加热后出现收缩变形、表面起皱等缺陷，达不到质量要求，而模压能得到尺寸与形状准确、外观质量良好的热收缩异型套管。     

国外异型精细陶瓷制品新工艺

国外异型精细陶瓷制品新工艺最近，日本开发出一种异型精细陶瓷制品的新型生产工艺技术。制作精细陶瓷制品的传统粉浆浇注工艺是：陶瓷坯体通过向模子注入陶瓷粉浆，然后借吸收模子清除水份，再经固化和脱模等工序制成。用这种传统工艺生产异型陶瓷制品，其坯体在脱水、固...     

普利司通

4月26日，借2006中国国际橡塑展之机，埃克森美孚化工公司在上海推出了两种新开发的Santoprene^TM热塑性硫化弹性体（TPV），主要用于汽车市场，可满足原始设备制造商的需求。其中一种产品主要为玻璃滑道转角成型应用而设计，可与热塑性弹性体（TPE）系统以及EPDM橡胶异型构件紧密粘合，并提供良好的密封性能。因其生产的转角成型件不需进行二次涂覆表面助滑剂，从而降低了系统装配成本。另一种产品与使用不同热塑性塑料或橡胶材料制成的汽车部件相匹配，通过加工可减少部件的色差、调整部件的外观，满足光泽度、闪亮性或不光滑外观的效果要求。     

钢结构建筑异型节点极限承载特征多尺度非线性数值模拟

异型节点作为传递建筑结构内力的枢纽,满足受力要求是结构安全的重要保证。为了精准还原异型节点的力学特征,提出钢结构建筑异型节点极限承载特征多尺度非线性数值模拟方法。考虑几何结构、材料属性等因素,构建钢结构建筑异型节点的非线性有限元模型。模拟异型节点荷载施加过程,多尺度分析节点的受力机理。从抗剪和抗弯两个方面,计算异型节点的极限承载力,输出异型节点的极限承载特征数值模拟结果。结果表明,与传统数值模拟方法相比,优化设计方法的极限承载力模拟误差降低了1.88 N,本文方法的应用能够有效控制异型节点的失稳概率。     

重防腐技术在供水输运系统中的应用(II)

3.4 涂层耐冲刷和气蚀性能好输水中不可避免地混有泥沙和碎石，在这种环境下涂层受到固液双相流的冲刷磨蚀和 水中的介质化学腐蚀的交互作用，这就需要涂层优异的抗冲刷、磨蚀和气蚀。图6上显示了1 ％NaCl溶液中含有10％的砂粒（120目）时，涂层的临界流速仍可达到7 m/s，表明SEBF涂层 具有良好的抗冲刷磨蚀性能。作为输水系统中的辅助设备如泵、阀门等除了耐化学介质腐蚀 ，还必须耐磨、耐气蚀，而SEBF/SLF涂层在这方面具有很好的特性。近几年，用SEBF涂装的 泵、叶轮、阀门、弯头等异型构件和设备用于核电站的海水回路中，效果非常…     

标准成型机在异型轮胎生产中的应用

目前,普通斜交轮胎市场已趋饱和,但异型轮胎市场仍有空间.普通轮胎成型机性能参数与异型轮胎不匹配,不适合异型轮胎生产.因此我公司对现有的LCB-2A成型机进行改造用于生产异型轮胎,本文做简单介绍.     

填充聚苯胺和炭黑的聚酰亚胺中间转印构件

本发明涉及转印构件，具体涉及用于由光电接收器件或另一转印构件向复印基体或另一转印构件传输静电印刷（包括静电印刷机、数字印刷机）显影图像的中间转印构件。在本发明的实施方案中，选择的是由含有聚苯胺和炭黑（CB）的导电填料层组成的转印构件。这样的转印构件还含有一种聚酰亚胺基体。     

KENICS型静态混合器结构参数的改变对单相流的阻力和传热的影响

文中对八种规格的Kenies型静态混合器进行了立式装置内的空气阻力和传热对比试验,得到了Re=2300—20000范围内的f～Re和Nu～Re关联式;分析了机理;评价了性能;认为适当增加它的标准型元件的扭率和扭角以及使元件之间有一定的间距,可显著降低流动阻力损失,而仍能基本保持标准到的较高的强化传热效果.     

Monosaccharide Derivatives with Low‐Nanomolar Lectin Affinity and High Selectivity Based on Combined Fluorine–Amide,Phenyl–Arginine,Sulfur–π, and Halogen Bond Interactions

The design of small and high‐affinity lectin inhibitors remains a major challenge because the natural ligand binding sites of lectin are often shallow and have polar character. Herein we report that derivatizing galactose with un‐natural structural elements that form multiple non‐natural lectin–ligand interactions (orthogonal multipolar fluorine–amide, phenyl–arginine, sulfur–π, and halogen bond) can provide inhibitors with extraordinary affinity (low nanomolar) for the model lectin, galectin‐3, which is more than five orders of magnitude higher than the parent galactose; moreover, is selective over other galectins.     

2D-NLDFT adsorption models for carbon slit-shaped pores with surface energetical heterogeneity and geometrical corrugation

In this work, we show that the standard slit pore model widely used for the characterization of activated carbons may be improved by introducing structural and/or energetical heterogeneity to the surface of pore walls. The existing one dimensional slit pore model assumes graphite-like energetically uniform pore walls. As a result of this assumption adsorption isotherms calculated by the non local density functional theory (NLDFT) do not fit accurately the experimental N₂ data measured for real activated carbons. Assuming a graphene-based structural framework for activated carbons and using a 2D-NLDFT treatment of the fluid density in the pores we consider two options for model pores: energetically heterogeneous (EH) and geometrically corrugated (GC). For testing, we applied these two models to the pore size analysis of porous carbons that were giving poor results of the analysis with the standard slit model. We found that the typical artifacts of the homogeneous slit pore model were eliminated. Also, the agreement of the new models with experimental data was significantly better than that of the standard slit model.     

非金属压力管道元件标准体系现状分析与对策

分析了目前我国非金属管道元件标准体系现状,同国际上发达国家标准体系进行了对比,论述了现阶段我国标准体系存在的标准体系不完善、标准规范老化问题比较突出和关键标准存在缺失和不适用问题,有针对性地提出了我国建立健全我国非金属管道元件标准的具体措施——加强标准与国际接轨、加强标准归口组织沟通协调工作力度和加快紧缺、老化标准的研制和更新,为我国非金属管道元件标准体系发展提供了具体对策。     

Formation Specifics of Heat-Absorbing Float Glass

A qualitative assessment of the spectral and viscosity-temperature parameters of heat-absorbing glass in comparison with standard clear glass is performed, and its molding specifics are clarified. Based on the patent literature and the practical experience of glass production on the ÉPKS-4000 line at the Saratov Institute of Glass, the need for modifying the structural elements of the overflow unit and the molding conditions, in order to produce high-quality heat-absorbing materials, is demonstrated.     

Comparative energy analysis from fire resistance tests on combustible versus noncombustible slabs

Standard fire resistance tests have been used in the design of structural building elements for more than a century. Originally developed to provide comparative measures of the level of fire safety of noncombustible products and elements, the recent resurgence in engineered timber construction raises important questions regarding the suitability of standard fire resistance tests for combustible structural elements. Three standard fire resistance floor tests (5.9 m × 3.9 m in plan), one on a concrete slab and two on cross-laminated timber (CLT) slabs, were undertaken to explore some of the relevant issues. The fuel consumption rate within the furnace was recorded during these tests, and the energy supplied from this was determined. An external fuel supply (from natural gas supplied to the furnace) equating to approximately 3 MW was recorded throughout the concrete test, whereas this was about 1.25 MW throughout the CLT tests. The total heat release rate was calculated using carbon dioxide generation calorimetry; this yielded values of approximately 1.75 MW during the CLT tests (ie, an additional energy contribution of approximately 0.5 MW from the timber). This demonstrates that considerably more energy input (by about 1.25 MW) was needed to heat the system when the test sample was noncombustible. A further series of six large-scale compartment fire experiments (6 m × 4 m × 2.52 m) was undertaken to further explore comparative performance of combustible versus noncombustible construction when the external fuel load is kept constant and is governed by more realistic compartment fire dynamics. For a fuel-controlled case, the peak temperatures in the compartment with an unprotected CLT ceiling were approximately 200°C higher than in the compartments with a concrete ceiling, whereas for a ventilation-controlled case, the compartment with a CLT slab ceiling displayed a burning duration that increased by approximately 15 minutes. Potential implications for standard fire resistance testing of combustible specimens are discussed.     

Capturing the non‐spherical shape of granular media and its trickle flow characteristics using fully‐Lagrangian method

We performed a numerical analysis for simulating granular media structures containing non‐spherical elements and the liquid trickle flow characteristics of such structures. Fully‐Lagrangian numerical simulation methods can track all motion information for solid or liquid elements at each point in time. We introduced suitable compressibility to moving particle semi‐implicit (MPS) and performed individual packing behavior calculations for non‐spherical elements, based on discrete element method (DEM) with expanded functions. Rigid bodies‐DEM is a method using a DEM contact force model that is expanded to handle the motion of freely shaped solids. It expresses complex shapes to enable low calculation costs and intuitive mounting. We used the boundary for the granular media configured with non‐spherical elements to implement a trickle flow simulation based on weakly compressible‐MPS. Even for elements of equal volume, different shapes changed the liquid passage velocity and hold‐up amount. The mean downflow velocity of the liquid phase was not always dependent on the void fraction. For the plane of projection, we obtained a good correlation with the mean downflow velocity in each packed structure, and successfully performed arrangements according to the new liquid‐passage shape coefficient. © 2016 American Institute of Chemical Engineers AIChE J, 63: 2257–2271, 2017     

三维配管软件中图形描述方法的探讨

在PDSOFT三维配管软件中，对工程中一些复杂的非标设备进行图形描述比较困难，对此提出了增加基本体元和组件，用基本设备图形与基本体元、组件图形等进行组合的方式，建立复杂非标设备模型。这种方法使图形描述更加灵活方便，并在实际应用中取得了良好效果。     

极谱仪应用的最新进展

主要从极谱仪的应用论述了极谱分析法的最新技术,综述了极谱分析法在各个领域应用情况,极谱仪的设备费用要求、灵敏度、操作等方面的优越性,在很多中、小型的检测机构、科研单位得到广泛的应用。目前已成为测量微量元素的常用分析仪器,它能测量纯金属中的杂质,检测有机物、无机物中金属类微量元素和非金属微量元素的含量。     

Standard finite element techniques for efficient stress analysis of adhesive joints

The paper documents ongoing research in the field of stress analysis of adhesive bonded joints and aims at developing efficient and accurate finite element techniques for the simplified calculation of adhesive stresses. Goal of the research is to avoid the major limitations of existing methods, in particular their dependency on special elements or procedures not supported by general purpose analysis packages. Two simplified computational methods, relying on standard modelling tools and regular finite elements are explored and compared with the outcome of theoretical solutions retrieved from the literature and with the results of full, computationally intensive, finite element analyses. Both methods reproduce the adherends by means of structural elements (beams or plates) and the adhesive by a single layer of solid elements (plane-stress or bricks). The difference between the two methods resides in the thickness and in the elastic properties given to the adhesive layer. In one case, the adhesive thickness is extended up to the midplane of the adherends and its elastic modulus is proportionally increased. In the other case, the adhesive layer is maintained at its true properties and the connection to the adherends is enforced by standard kinematic constraints. The benchmark analyses start from 2D single lap joints and are then extended to 3D configurations, including a wall-bonded square bracket undergoing cantilever loading. One of the two simplified methods investigated provides accurate results with minimal computational effort for both 2D and 3D configurations.