冷喂料挤出机螺旋啮合喂料装置的性能分析与研究

针对新型的螺旋啮合喂料装置进行分析,从机理上讨论了螺旋啮合喂料装置的优越性,同时就实验结果,讨论分析了啮合量、螺杆转速、胶料种类等对挤出机性能参数的影响程度,为后续的结构设计和研究提出了一定的参考基础。     

Ruffed grouse feeding behavior and its relationship to secondary metabolites of quaking aspen flower buds

Quaking aspen (Populus tremuloides Michx.) staminate flower buds and the extended catkins are primary food resources for ruffed grouse (Bonasa umbellus). Winter feeding observations indicate that ruffed grouse select specific trees or clones of quaking aspen to feed in. Flower buds and catkins of quaking aspen were analyzed for secondary compounds (tannins, alkaloids, and phenolics) that might cause ruffed grouse to avoid trees with high levels of these compounds. Coniferyl benzoate, a compound that has not been previously found in quaking aspen, exists in significantly higher concentrations in buds from trees with no feeding history as compared to ruffed grouse feeding trees. Aspen catkins were also significantly lower in coniferyl benzoate than buds from the same tree. Ruffed grouse feeding preference was not related to the tannin or total phenolic levels found in buds or catkins. Buds from feeding trees had higher protein levels than trees with no feeding history; however, catkins did not differ from buds in protein concentration. The high use of extended catkins in the spring by ruffed grouse is probably due to a lower percentage of bud scale material in the catkin as opposed to the dormant bud. Bud scales contain almost all of the nontannin phenolics in catkins and dormant buds. A feeding strategy where bud scales are avoided may exist for other bird species that feed on quaking aspen. Dormant flower buds are significantly lower in protein-precipitable tannins than catkins and differ in secondary metabolite composition from other aspen foliage.Minnesota Agriculture Experiment Station Journal Series No. 16,953.     

下饲煤技术在碳酸钙生产中的应用

介绍了下饲煤技术的原理、优点及其在中小碳酸钙厂的应用,该技术无论从提高经济效益还是从环保角度都极具推广价值。     

洗发水瓶盖注射模设计

通过对洗发水瓶盖的结构和工艺性进行分析,确定了盖嘴采用圆弧抽芯机构,整个产品采用电机带动齿轮进行自动螺旋脱模,以及采用潜伏式进胶的模具设计方案。并详细介绍了模具的工作过稃,经生产证明,该模具生产的产品完全符合要求,并在同类产品的模具设计中有一定的借鉴作用。     

塑料斜齿轮注塑模具设计与分析

以聚酰胺6(PA6)斜齿轮塑件为对象,进行了一模四腔的注塑模具结构设计与分析,并实现了斜齿轮塑件的顺利脱模。     

圆盘类零件加工自动上下料系统设计

针对批量加工皮带轮用圆盘类零件中人工上下料问题,设计一种经济型数控车床适用的自动上下料方案,有效提高了生产自动化程度。整个装置基于CK6136-750机床,采用SolidWorks软件对自动上下料装置进行了设计,包括上料机构、下料机构、坯料推进机构等。通过数控系统二次开发,结合气动技术、PLC控制技术与传感器技术,开发自动上下料控制系统,并添加进CNC系统的辅助功能中,实现了上料、加工、下料的一体化控制,可以一人多机操作,降低了生产成本,缩短了加工时间,具有广泛的市场需求和工业应用前景。     

密闭式炼胶（塑）机若干结构改善

本文主要阐述了密闭式炼胶（塑）机的主要功能、结构组成及其工作特点,并从装配和维修角度提出了几点结构改善建议,以实现整个设备合理、便捷、可靠的装拆性,最终强调了做为设备维护人员必须考虑的几项问题。     

全自动单道推板窑的制造

介绍了四川鸿舰重型机械制造有限责任公司制造的全自动单道推板窑,分析了该推板窑的窑头进料装置、窑头推进装置、窑体、窑尾推出装置、窑尾横移出料装置、循环装置等的结构组成及工作过程,并针对箱体法兰和冷却水箱工艺要求制定了加工工艺。实践证明：整套设备结构先进,联动运行顺畅,满足生产要求。     

冷热饮水机分流阀注射模设计

根据分流阀的结构特点,介绍了分流阀注射模的主要结构,该结构解决了外螺纹侧向抽芯与塑件上小孔的4个方向抽芯问题,并就模具浇注系统的偏心问题的解决方法进行了说明     

一种直流开关送丝电源

介绍了一种新型高效大功率送丝电源，分析了该系统的组成和工作原理，应用该电源，使送丝系统的性能更加优良。