轻型家具的材料与工艺第四讲：蜂窝板的五金件

目前,蜂窝板的结构有两种：有框蜂窝板和无框蜂窝板。对于有框蜂窝板,很多板式家具五金件都可以用：而对于无框蜂窝板．则需要专门的五金连接件。 家具五金件与板材的连接形式主要有两种：一种是嵌入卡紧形式．以连接母体和预埋螺母、隔板销为典型产品;一种是螺钉安装固定形式．以家具拉手、抽屉轨道等五金件为典型。     

自动丝网印花机精密定位装置设计

介绍了丝网印花的工艺流程和工作原理,重点介绍了网框台板的定位.分析了目前常用的定位装置及其定位误差,并提出了一种新型的精密定位方式即采用台板与机架上相对应的两个相互垂直的定位块实现准确定位.网框固定在机架上,采用多个定位钢球和气缸实现初定位和夹紧,实现网框与台板的精确定位,不但定位精度高,且操作方便快捷、效率高.     

减少多臂织机错花的方法

<正>史陶比尔2660型多臂织机开口机构出现组织错花时较难维修。我们公司根据生产经验,总结了减少该织机出现组织错花的方法,介绍如下。保证各综框、综框钩、连杆、开口臂在同一平面内。防止连杆与多臂开口箱内的内摇臂错位对多臂偏心轮施加不同心阻力,造成综框运动不顺畅,出现综框上下运动不符合织物组织的运动规律。检查多臂箱内油质、油温是否异常以及各部分零件上是否有毛刺划痕,特别是偏向盘、传动轮、内摇臂连杆等。如果有毛刺划痕势必会增加     

Which one is your favorite?

正超大尺寸黑色圆框太阳镜,看似厚重的前框上部巧妙地搭载细巧的金属框线,两处的无缝连接呈现出举重若轻之感前框4角饰有机械质感的金属点缀镜臂内侧印有Dries Van Noten和Linda Farrow合作款Logo搭配100%防紫外线的褐色镜片在日本手工制作尺寸:51mm x 20mm x 135mm     

芝术抽屉柜

这是一件特殊设计的艺术小柜,上部有较大的贮物空间,外形为红、蓝两色的曲线闭合的箱件,箱内用发亮的不锈钢装饰。下部为7个抽屉,脚部为4个粗大的脚轮。     

超长预应力筋结构的设计与施工

框剪结构作为一种结构形式在结构设计中被广泛采用。随着经济建设的发展以及人们对建筑使用功能要求的日益提高,现代框剪结构形式的建筑呈现出以下两个特点:(1)结构形体越来越大,结构纵向长度较长;(2)结构跨数多且不设缝,为多跨连续混凝土结构。本文结合某防汛调度中心办公楼工程设计、施工实践对超长结构预应力做一探讨。     

一种皮革加工用快速染色设备

专利公开号:CN217398897U申请人:温州市百佳皮件有限公司摘要:本实用新型公开了皮革加工技术领域的一种皮革加工用快速染色设备,包括壳体,壳体的底部有一体成型集液箱,且集液箱顶部外壁的一侧开设有集液腔,壳体顶部内壁中心处的一端通过螺栓安装有延伸至集液腔内部的定位框,定位框的内侧壁上铺设有呈等距离结构分布的布液管,布液管的内侧壁上螺纹连接有呈等距离结构分布的喷头,且定位框的顶部焊接有贯穿壳体并与布液管之间相连通的输液管,本实用新型在皮革穿过定位框时,泵体将染色液通过输液管输送至布液管,随后布液管将染色液通过等距离分布的喷头喷向穿过定位框的皮革,使皮革可以得到快速均匀的染色加工,很好地提升了皮革的染色效果。     

磷化氢对不同包装的片烟穿透能力研究

在用塑料帐幕密封情况下 ,测定了熏蒸空间中和夹板箱、瓦楞纸箱、瓦楞纸箱加塑料内衬 3种包装的片烟内部PH3的浓度 ,比较了目前片烟的 3种主要包装形式对PH3穿透力的影响。结果表明 :在熏蒸空间中 ,熏蒸后 2 4～ 36h ,PH3气体浓度即可达到最大值 ,然后缓慢下降 ;夹板烟及箱装烟内部的PH3气体浓度变化基本与熏蒸空间同步 ;但加塑料内衬的片烟箱内PH3浓度的最大值则出现在施药后 72h ,较熏蒸空间至少滞后 36h ,同时 ,其箱内PH3浓度低于熏蒸空间中PH3浓度 ;散毒期间 ,加内衬的片烟箱内PH3散逸速度比其它两种包装慢     

PICANOL-GTM型剑杆织机踏盘的修复

我公司于1987年7月安装了30台PI-CANOL-GTM型剑杆织机,主要生产重磅牛仔布。该机的综框升降是由大小两片踏盘组成双踏盘机构控制的,全部踏盘均放置在油浴箱内。由于布的张力很大,对各部件的冲击载荷也大。最近两年发现踏盘陆续磨损,磨损严重的都是小踏盘(见附图)。因此,我们从1992年12月     

纯棉厚重织物的双层履带汽蒸煮练

双层履带汽蒸箱的箱体内履带板上部装有预热导辊,下层履带可液下煮练,堆布量大,汽蒸时间长。与单层履带相比,织物在双层汽蒸箱内运行平稳,无折绉、偏斜现象,棉籽壳膨化好、产量高,缺点是液下煮练箱内除垢困难,布出蒸箱后布边较干。     

模切机后靠规定位误差的分析

对模切机后靠规定位机构在槽凸轮远休止段定位时的定位误差进行了定性和定量分析,给出了随着机器工作速度的提高,后靠规定位误差有增大趋势的结论,并着重指出在满足机器模切精度的范围内,尽量避免某个特殊转速的结论.     

Residual efficacy of deltamethrin as assessed by rapidity of knockdown of Tribolium castaneum on a treated surface: Temperature and seasonal effects in field and laboratory settings

Concrete arenas were treated with the pyrethroid deltamethrin at rates of 8, 16, and 24 mg active ingredient [AI]/m², and held either in a chamber set at 27 °C, inside a non-climate controlled interior building, or the floor of an empty grain bin. Bioassays of the arenas were conducted post-treatment by exposing mixed-sex adult Tribolium castaneum Herbst and assessing knockdown every 30 min for 3 h. Four separate trials were conducted, two during Autumn of 2015 and 2016 and two during Summer of 2016 and 2017. Knockdown did not increase with increasing application rate. Equations were fit to the combined rate data at each residual bioassay week for each location, and mean data were also compared to determine differences in knockdown at different times among the arenas held in the different locations. During Summer, knockdown was generally slower after two weeks on arenas held inside the grain bin compared to arenas held inside the building or inside the chamber. The arenas inside the bin experienced more hours of temperature above 32.2 °C during Summer compared to arenas inside the building or chamber. These extra hours of high temperature accumulation could have contributed to increased degradation of the residues, resulting in slower knockdown. During Autumn rapidity of knockdown was generally similar on arenas held in all three locations. In all trials, the total hours of temperature accumulation were far greater in the chamber compared to the building or the grain bin, but this had little effect on efficacy. Managers can use this information to more precisely apply deltamethrin, either as a pre-binning treatment inside a grain bin or elevator silo or as a residual treatment inside a milling or production facility.     

Exposure to particulate matter,volatile organic compounds,and other air pollutants inside patrol cars

People driving in a vehicle might receive an enhanced dose of mobile source pollutants that are considered a potential risk for cardiovascular diseases. The exposure to components of air pollution in highway patrol vehicles, at an ambient, and a roadside location was determined during 25 work shifts (3 p.m. to midnight) in the autumn of 2001, each day with two cars. A global positioning system and a diary provided location and activity information. Average pollutant levels inside the cars were low compared to ambient air quality standards: carbon monoxide 2.7 ppm, nitrogen dioxide 41.7 microg/m3, ozone 11.7 ppb, particulate matter smaller 2.5 microm (PM2.5) 24 microg/m3. Volatile organic compounds inside the cars were in the ppb-range and showed the fingerprint of gasoline. PM2.5 was 24% lower than ambient and roadside levels, probably due to depositions associated with the recirculating air conditioning. Levels of carbon monoxide, aldehydes, hydrocarbons, and some metals (Al, Ca, Ti, V, Cr, Mn, Fe, Cu, and Sr) were highest in the cars, and roadside levels were higher than ambient levels. Elevated pollutant levels were related to locations with high traffic volumes. Our results point to combustion engine emissions from other vehicles as important sources of air pollutants inside the car.     

施加堆肥后土壤中重金属形态变化研究——造纸污泥堆肥农用的重金属污染研究之二

重金属形态研究是评价重金属污染风险度的方法之一。本研究测试分析了添加堆肥前后和种植作物前后土壤重金属的5种形态。结果表明:添加污泥堆肥前后的土壤中Cu、Ni、Cr、Pb主要以残渣态形式存在,Zn主要以Fe-Mn氧化态形式存在,这两种形态的重金属的生物有效性都很小,而Cd主要以可交换态和碳酸结合态存在,生物有效性较大;添加堆肥后土壤的重金属生物有效性有所降低,当在添加堆肥的土壤上种植作物后,土壤中重金属的生物有效性将进一步降低。     

粗纱机牵伸罗拉定位工具的改进

为了提高粗纱机牵伸罗拉的装配精度及调试速度,通过分析原有罗拉装配系统及原有调试方法存在的缺点,改进设计出一种将车面板的前侧面作为定位基准面,再将罗拉轴线作为第二基准的罗拉定位工具。实践表明,通过使用罗拉定位工具不同的定位面作基准,既能保证一罗拉轴线与车面板前侧面平齐的要求,又能保证一罗拉轴线与牵伸传动托架侧面垂直的要求。认为,该罗拉定位工具是粗纱机左、右两种机型通用的一种工具,能完全满足提高整机调试精度及调试速度的要求。     

Untersuchung über die Imprägnierbarkeit von Buchenholz mit Steinkohlenteeröl

In the present study the physical phenomena inside sleepers during impregnation after the Doppel-Rüping process have been investigated. Measurements of the pressure and the temperature profile have shown that there is a substantial delay in reaching the outer treatment conditions within the wood. Despite applying high temperature (above 100°C) and two successive vacuum phases, the moisture content of the wood has dropped only insignificantly. The investigations have been carried out on beech wood with white and red (false) heart, the latter containing hardly impregnable wood zones.     

The kinetics and mechanism of caffeine infusion from coffee: The hindrance factor in intra-bean diffusion

Green and medium-roast Kenyan arabica coffees were ground and sieved, and the 0·85–1·8 mm size fractions partially converted into two water-swollen forms by an appropriate series of treatments. The first form still contained a mix of coffee solubles, the second only caffeine. The rates of caffeine infusion into water at 80°C were then measured for the dry coffee and for the two water-swollen preparations. The caffeine was extracted two to three times faster from the solute-free water-swollen preparation than from the dry material Analysis of the results showed that counterflow of water the swelling of coffee particles, caffeine association with other solubes and physical restraints within the bean matrix all contribute to the low diffusion coefficient of caffeine inside the coffee particles. The behaviour of the green and the medium roast coffees was surprisingly similar.     

食品微波膨化技术研究进展

微波膨化技术作为一种新型食品生产技术熏正逐步在食品工业特别是休闲膨化小食品生产中得到广泛应用。微波膨化是微波能量到达物料深层转换成热能,将使物料深层水分迅速蒸发形成较高的内部蒸汽压力条件,迫使物料膨化。利用微波膨化技术加工食品能最大限度的保存食品原有的营养成分,加工时间短,膨化、干燥、杀菌工艺同时完成。本文主要介绍了微波膨化机理以及微波膨化技术在食品工业中的应用,并着重讨论了淀粉、蛋白质及其他添加剂等影响膨化效果的因素,同时对微波膨化技术的应用及发展作了展望。     

Combined use of two single-component enzymatic time-temperature integrators: application to industrial continuous rotary processing of canned ravioli

Two original, highly dehydrated, small single-component enzymatic time-temperature integrator (TTI) systems, TTIL and TTIs, were prepared. Their z-values were 13.9 and 16.4 degrees C, respectively, and they were based on Bacillus licheniformis alpha-amylase and Bacillus subtilis alpha-amylase, respectively. The isothermal calibration of these two TTIs revealed that (i) they can be used in the temperature range of 100 to 140 degrees C, (ii) results can be read within 5 min, and (iii) they can be used individually for the measurements of process values 13.9 degrees CF121.1 degrees C and 16.4 degrees CF121.1 degrees C up to 98 min and 85 min, respectively. Because these two TTIs have different z-values above 10 degrees C, they could be used in combination with the multicomponent TTI concept to estimate process values 10 degrees CF121.1 degrees C inside particles of a solid or liquid food submitted to rotary processing. Raviolis in tomato sauce sterilized in an industrial-scale reel and spiral continuous retort were examined in this study. Two methods, based on the combination of a one-dimensional explicit finite difference heat-transfer model with the experimental responses of the TTIs, were used to take into account the possible deviations in evaluation of 10 degrees CF121.1 degrees C values. A process value 10 degrees CF121.1 degrees C of 23.6 min with a standard deviation of 1.5 min was determined inside raviolis using the multicomponent TTI approach, and a process value 10 degrees CF121.1 degrees C of 33.6 min with a standard deviation of 1.5 min inside the sauce was calculated from the temperature recording data.     

微乳液热力学方程的讨论

将液滴视为椭球状对微乳液的热力学方程进行了讨论,找出了当液滴由椭球状趋向圆球状或趋向细棒状时液滴内外压强的分布趋势,这对于进一步理解和计算双连续分布情况下微乳液的液滴内外压强和弯曲应力将是有益的。