复杂模具开发制造技术的探讨

本文结合我公司复杂模具的生产状况，以及多年模具生产实践，从经济和技术角度阐述了复杂模具制造的发展方向，论述了集教育处要技术，电加工技术和数控技术于一体的高技术（CAD／CAPP／CAM）复杂模具综合开发和制造，是复杂模具生产发展的方向。     

兵工大型企业建立模具技术中心的可行性论证

本文从我公司产品开发和对模具需求情况出发，结合多年来我公司模具制造的实践经验，以及生产现状，阐述了兵工大型机械制造企业模具制造技术的发展方向，论述了集计算机技术，数控技术和电加工技术于一体的高技术模具开发和制造技术中心，是大型机的高技术模具开发和制造技术中心，是大型机械加工企业模具制造的发展方向和归宿，也是市场经济发展的客观需要。     

ASA/PVC彩色共挤异型材的研制

概述了彩色共挤技术的发展，ASA与PMMA、PVC的性能比较及ASA／PVC、PMMA／PVC、PVC／PVC彩色共挤技术的特点，通过合理配置共挤没备、模具及生产工艺流程，并通过模具调试及产品质量控制生产出性能优异的ASA／PVC彩色共挤门窗型材。提出了生产中应注意的主要问题。     

汽车覆盖件模具 CAD/CAM 的研究与应用

汽车覆盖件模具ＣＡＤ／ＣＡＭ的技术应用是关系到我国汽车行业在汽车改型与换代过程中最关键的因素之一，作者叙述了模具采用ＣＡＤ／ＣＡＭ技术对提高模具生产效率、提高产品质量的重要性。     

3D打印技术在汽车轮胎及其模具方面的研究

随着我国科学技术的发展，3D打印技术已经在模具制造、航空航天、机械制造、医疗等多个行业有了非常广泛的应用，如何将3D打印技术应用于轮胎行业，制造出更高水平的汽车空心轮胎，实现3D打印技术与轮胎生产及其模具制造的高效结合，已经成为当代学者非常关心的热点话题。介绍3D打印技术在汽车轮胎行业的应用；介绍3D打印技术在轮胎翻修方面的应用；介绍3D打印技术在轮胎模具制造中的应用；分析3D打印技术在汽车行业的发展趋势。     

低含量短玻纤双向增强HDPE/PP管的研制

为提高塑料管材的强度．特别是其周向拉伸强度，没计制造了双向复合应力场挤管模具，用该模具生产出了低含量(3％)短玻纤增强的HDPE／PP管村．并对这些管材的轴向和周向拉伸强度进行了，测试分析、结果表明．该管材的轴向和周向拉伸强度均得到了增强。     

《模具制造技术》一体化课程教学实践与探讨

一体化课程教学是高职教学改革的重点。基于我校模具制造专业课程改革的现状,重点介绍了《模具制造技术》一体化课程教学实践的必要性,并提出了有效的实施措施。     

快速成型技术及其在模具制造领域的应用

快速成形技术是20世纪80年代的一种崭新的集精密机械、数控、材料科学、激光技术和计算机辅助设计为一体的制造技术。由于其快速性和高度柔性,已经得到广泛的应用和研究。以快速成形为技术支持的快速模具制造作为缩短产品开发时间及模具制作周期的先进制造技术已成为当前的重要研究课题和制造业核心技术之一。本文介绍了快速制模方法与快速成型技术特点,阐述了快速成型技术在快速制模领域的应用,并指出了快速成型制模的发展不足之处。     

CAD／CAM发展概况及在工模具中的应用

本文介绍了CAD／CAM技术的发展概况以及在国内，外的应用情况，分析了CAD／CAM在工模具生产中的应用前景，简介了我公司将CAD／CAM技术用于工模具生产的实践经验。     

我国模具行业的现状与发展

本文介绍了我国模具工业目前的生产组织结构，产品水平、工艺装备水平、模具标准化水平及模具的ＣＡＤ／ＣＡＭ的技术状况，指出了当前模具工业存在的主要问题，并探讨了振兴我国模具工业的发展战略及措施。     

空冷管道制作技术

介绍在施工现场制作直接空冷发电机组中不封口异厚管道及异径偏心管技术。针对不封口异厚管道及异径偏心管的制作特点和难点,阐述关键制作工艺和质量控制措施,通过采用工装胎具和埋弧自动焊的焊接方法,取得了良好的制作质量及较高的工效,为同类型直接空冷发电机组管道的加工制作积累经验。     

高孔洞率砌块挤出机头及机口模具的设计

分析了挤出机机头及机口模具对高孔洞率烧结保温砌块挤出成型的影响,阐述了机头及机口模具的设计、制作方法以及应注意的问题,此外还对挤出机口模具进行了三维建模。     

Indoor mold levels and current asthma among school‐aged children in Saskatchewan,Canada

Current knowledge regarding the association between indoor mold exposures and asthma is still limited. The objective of this case–control study was to investigate the relationship between objectively measured indoor mold levels and current asthma among school‐aged children. Parents completed a questionnaire survey of health history and home environmental conditions. Asthma cases had a history of doctor‐diagnosed asthma or current wheeze without a cold in the past 12 months. Controls were age‐ and sex‐matched to cases. Vacuumed dust samples were collected from the child's indoor play area and mattress. Samples were assessed for mold levels and quantified in colony‐forming units (CFU). Sensitization to mold allergens was also determined by skin testing. Being a case was associated with family history of asthma, pet ownership, and mold allergy. Mold levels (CFU/m²) in the dust samples of children's mattress and play area floors were moderately correlated (r = 0.56; P < 0.05). High mold levels (≥30 000 CFU/m²) in dust samples from play [adjusted odds ratio (aOR) = 2.6; 95% CI: 1.03–6.43] and mattress (aOR) = 3.0; 95% CI: 1.11–8.00) areas were significantly associated with current asthma. In this study high levels of mold are a risk factor for asthma in children.     

养护剂在钢筋混凝土贮仓滑模施工中的应用

以某大直径钢筋混凝土筒仓的整体滑模施工工程为例，根据其工程特点及以往的施工经验，就使用混凝土养护剂进行养护的施工工艺进行了介绍，解决了筒仓整体滑模施工中混凝土的养护问题。     

滑框提模技术在桥梁高墩施工上的应用

结合工程实例,主要介绍了滑框提模施工技术在桥梁实心墩施工中的应用,指出滑框提模施工技术在桥梁高墩现浇混凝土中不仅机械化程度高、现场场地占用少、结构整体性强、安全作业有保障,而且还能较好的满足墩身外观及质量要求,是一项综合经济效益显著的施工技术。     

Health risk associated with dietary co-exposure to high levels of antimony and arsenic in the world's largest antimony mine area

Like arsenic (As), antimony (Sb) is known to be a genotoxic element in vitro and in vivo. Sb is now recognized as a global contaminant and has aroused the global concerns recently. However, knowledge is scarce concerning the transfer of Sb from the environment to humans and the related hazards to human health. In this pilot study, the health risk and main pathway of long-term human exposure to Sb and As for residents around Chinese Xikuangshan (XKS) Sb mine, the world's largest Sb mine, were evaluated by dietary exposure and hair accumulations survey. The concentrations and species of Sb and As in food samples (n = 209) from three main categories and six subcategories, and in hair samples (n = 89) were determined. Residents in the vicinity of XKS had an estimated dietary intake of Sb (554 μg/day) which was 1.5 times higher than the tolerable daily intake (TDI) (Sb, 360 μg/day), whereas their dietary intake of inorganic As (107 μg/day) was slightly lower than the provisional tolerable weekly intake (PTWI) of 15 μg/kg BW/week (equal to 129 μg As/day). Hair Sb and As concentrations (Sb, 15.7 mg/kg, DW; As, 3.99 mg/kg, DW) in XKS residents are both above the normal/toxic level. Rice, vegetables (especially leafy vegetable), drinking water, and meat/poultry were the dominant dietary intake sources of Sb for the residents. In contrast, rice was the uniquely dominant dietary intake source of As. Antimonate (Sb(V)) was the dominant Sb species in vegetables, drinking water and residents' hairs. This study highlighted the difference of exposure characteristics between Sb and As. The preliminary results suggested that dietary exposures to Sb, rather than As, was the dominant health risk to local residents. Nevertheless, the adverse effects of As levels on the health of residents still can not be ignored since the elevated As concentrations in human hair have reached the critical level for health risks. In addition, this pilot study did not consider the possible Sb and As combined effects.     

激光跟踪仪LTD600在地铁隧道管模检测中的应用

随着时代的发展,现代化的隧道建设对隧道管片的精度要求越来越高,对生产管片的模具的精度要求也越来越高。我国的管片钢模的设计生产起步比较晚,相对国外的技术有一定的差距。本文采用高精度激光跟踪仪进行管模检测,并就传统方法与新兴方法各自的优缺点进行比较、分析和讨论。     

Building dampness and mold in European homes in relation to climate,building characteristics and socio‐economic status: The European Community Respiratory Health Survey ECRHS II

We studied dampness and mold in homes in relation to climate, building characteristics and socio‐economic status (SES) across Europe, for 7127 homes in 22 centers. A subsample of 3118 homes was inspected. Multilevel analysis was applied, including age, gender, center, SES, climate, and building factors. Self‐reported water damage (10%), damp spots (21%), and mold (16%) in past year were similar as observed data (19% dampness and 14% mold). Ambient temperature was associated with self‐reported water damage (OR=1.63 per 10°C; 95% CI 1.02‐2.63), damp spots (OR=2.95; 95% CI 1.98‐4.39), and mold (OR=2.28; 95% CI 1.04‐4.67). Precipitation was associated with water damage (OR=1.12 per 100 mm; 95% CI 1.02‐1.23) and damp spots (OR=1.11; 95% CI 1.02‐1.20). Ambient relative air humidity was not associated with indoor dampness and mold. Older buildings had more dampness and mold (P<.001). Manual workers reported less water damage (OR=0.69; 95% CI 0.53‐0.89) but more mold (OR=1.27; 95% CI 1.03‐1.55) as compared to managerial/professional workers. There were correlations between reported and observed data at center level (Spearman rho 0.61 for dampness and 0.73 for mold). In conclusion, high ambient temperature and precipitation and high building age can be risk factors for dampness and mold in homes in Europe.     

Indoor visible mold and mold odor are associated with new‐onset childhood wheeze in a dose‐dependent manner

Evidence is accumulating that indoor dampness and mold are associated with the development of asthma. The underlying mechanisms remain unknown. New Zealand has high rates of both asthma and indoor mold and is ideally placed to investigate this. We conducted an incident case‐control study involving 150 children with new‐onset wheeze, aged between 1 and 7 years, each matched to two control children with no history of wheezing. Each participant's home was assessed for moisture damage, condensation, and mold growth by researchers, an independent building assessor and parents. Repeated measures of temperature and humidity were made, and electrostatic dust cloths were used to collect airborne microbes. Cloths were analyzed using qPCR. Children were skin prick tested for aeroallergens to establish atopy. Strong positive associations were found between observations of visible mold and new‐onset wheezing in children (adjusted odds ratios ranged between 1.30 and 3.56; P ≤ .05). Visible mold and mold odor were consistently associated with new‐onset wheezing in a dose‐dependent manner. Measurements of qPCR microbial levels, temperature, and humidity were not associated with new‐onset wheezing. The association between mold and new‐onset wheeze was not modified by atopic status, suggesting a non‐allergic association.     

废弃油脂制备装配式建筑脱模剂的可行性分析

装配式建筑施工过程中,预制预构件的制作和现场的混凝土的浇筑质量,除了混凝土施工的影响外,就是脱模剂的生产和应用水平。以铝模板和混凝土为主要对象,就废弃油脂制备装配式建筑用环保脱模剂进行可行性分析,可得:利用废弃油脂为原料,采用低碳环保且零废物生产工艺,制备新型环保脱模剂,适用于装配式建筑混凝土构配件的预制和现场浇筑,技术可行,成本低,效益高。