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粉末涂装的基本知识

发布时间:2014.12.08    点击数: 153585

粉末概述

        在设计粉末涂装设备时,如对粉、汾末的基本性状、特性不理解,就无法进行精细的设计。所谓粉,是指小的固形物的集合体,它的细度很重要。将办长1cm的正方体制成边长50μm的正方体粉末,其个数是200的立方,800万个;表面积由6cm²增大到1200cm²的微位粉末,其个数为1.25×108个,表面积增大到3000cm²。

        因粉末涂料增大表面积后,使其具有易带静电、易受水分和受热影响、易煅烧、易附着在物体上等性质,随个数增加产生难操纵、易飞散、难管理等问题。如果在设备设计中未考虑这些,则就可能不会满足粉末涂装的功能。

设计时须知的粉末涂装用语

        (1)粒径(料度)分布。粉末粒子的直径称为粒度,粒度的分布范围称为粒度分布。粉末涂料粉碎后用筛除去粗的颗粒,得到规定粒度的粒子。在比较新粉的回粉的性质时确定筛目是必要的(见图1)。

        (2)体积密度。充填某体积的粉末质量的比值,是选用容器时所发票的。

        (3)安息角。粉末积存难易程度的大致标准供料斗设计和确定网管内网速时参考(见图2)。

        (4)流动层。粉末被空气吹起流动,呈浮游状态。是粉末涂料供给槽、流动槽、静电流动槽等的设计所必需的。

        (5)爆炸界限。用可燃物与空气混合比例表示其爆炸燃烧范围(上限、下限),它随粉末涂料所用的树脂各类变化,是决定排气量时必需的数值(见下表1)。

表1 粉末涂料爆炸下限浓度(参考值)

粉末涂料的各类 爆炸下限浓度/(g/m³)
环氧树脂 50
聚酯树脂 40
丙烯酸树脂 35

 

        关于QY千亿国际智能 About Liangshi InteRobot:
        上海QY千亿国际智能科技股份有限公司(股票代码:837430 厚积薄发 持续创新),为全球客户提供智能制造和表面处理系统解决方案,从业30多年,是一个集研发、设计、制造、工程安装、工程咨询于一体的专业化制造及自动化智能控制系统集成公司,能为客户解决:
        Shanghai Liangshi InteRobot Technology Corporation (Stock Code: 837430 Accumulate richly and break forth vastly; innovate continuously) provides surface treatment sandblasting system solution for global customers. By engaging in this industry for more than twenty years, we're a professional manufacturing and automatic intelligent control system corporation, which integrates researching, designing, manufacturing, project installation and project consulting. We can provide our customers with:
        1、化学表面处理喷抛丸、喷丸强化设备、热喷涂和涂装设备工艺系统解决方案和工艺装备;
              We provide process system solution and process equipments of surface treatment sandblasting shot blasting, shot peening, enameling, thermal spraying, coating equipment.
        2、智能制造自动化机器人应用工艺系统解决方案和工艺装备;
              We provide professional system solution and process equipments of automation and robot technology application.
        3、食品乳品、制药、生物、制冷、石油化工、船舶制造、能源、造纸、纺织系统领域承压系统集成整体解决方案;
              We provide professional integrated solution for pressure bearing system in fields of food dairy, biopharmaceutical, refrigerating, petrochemical, marine engineering, energy, paper-making, fabrics, etc.
        4、涂装环保设备:VOC废气、废水、粉尘处理和噪音治理系统工艺解决方案和工艺装备。
              We provide environment protection blasting and painting equipment: process solution and equipment of VOCs waste gas, waste water, dust, noise treatment system.
         5、专业提供压力容器设计制造:为食品乳品、生物制药、水处理、制冷、石油化工、船舶海工、电力能源、造纸纺织、有色金属等领域提供承压系统集成整体解决方案。
              Professionally provide the design and manufacture of pressure vessels: providing overall solutions for pressure system integration in the fields of food and dairy, biopharmaceutical, water treatment, refrigeration, petrochemical, shipbuilding and marine engineering, power and energy, paper and textile, non-ferrous metals and other fields.
        企业主导产品如下 The leading products of our company are as follows:
        主营业务:智能制造和表面处理工程系统集成的设计、研发、生产和销售。
        Main business: design, research, production and sales of surface treatment engineering system integration.
        六类主要产品:自动化涂装生产线、智能机器人喷涂系统、自动化喷抛丸生产线、智能机器人喷抛丸强化系统、自动化热喷涂系统、涂装节能环保设备。
        Six main product categories are: automatic painting production line, intelligent robot painting system, automatic shot/wheel blasting production line, intelligent robot shot peening system, automatic thermal spraying system, energy saving and environmental protection equipment for painting.
        产品主要应用于:新材料、新能源、工程机械、汽车制造、集装箱、船舶海洋工程、航空航天、港口桥梁、电子电气、环保工程、印刷造纸机械、医疗机械、纺织机械等领域。
        The products are mainly applied in: new materials, new energy, engineering machinery, automobile manufacturing, containers, marine engineering, aeronautics and astronautics, port bridges, electronic and electrical, environmental protection engineering, printing and papermaking machinery, medical machinery, textile machinery and so on.
        公司生产的表面工程系统集成具备智能、自动化的特点,可实现工业生产过程自动化控制,因而属于自动化装备。根据《高端装备制造业“十二五”规划》中对高端装备的定义“主要包括传统产业转型升级和战略性新兴产业发展所需的高技术高附加值装备”,公司产品属于高端装备,是为国民经济其他行业提供技术装备的战略性产业。
        The surface engineering system of our company integrates the characteristics of intelligence and automation, it can realize the automatic control of industrial production process, so it belongs to automatic equipment. According to the definition of premium-end equipment of 《The 125th programme of premium-end equipment manufacturing industry》, “it mainly includes the high technology and high value-added equipment required by traditional industrial transformation upgrading and the development of strategic new-emerging industries”. The company's products belong to the premium-end equipment, which is a strategic industry that provides technical equipment for the other industries of the national economy.
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