RIM(reaction injection molding)反应注射成型

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1、RIM（reaction injection molding)反应注射成型RIM(reaction injection molding)反应注射成型RIM（reaction injection molding)，中文俗称反应注射成型，是20世纪70年代后期在欧美率先发展起来的。是一种区别于传统注塑和其他成型工艺的一种特殊的工艺。其原理是：将两种反应原材料(聚氨酯组分和树脂混合物)分别放入带有搅拌器可控温度的进料罐中,经过精确计量,在高压下进入混合头.注射开始时,混合头的阀门打开,反应物在一定压力下进入混合室,高速激烈碰撞,然后在接近大气压的压力下流入模具,经放热化学反应,在模具中形成聚氨酯聚合

2、体。简单的说就是：两种聚氨酯(PU)原材料在模具中通过热化学反应成型出聚氨酯(PU）零件。Reaction Injection Molding (RIM) is the process by which molded polyurethane(PU) parts are made. In the process, 2 liquid components are mixed and injected into the mold where they chemically react and cure,which forms the polyurethane polymer parts.RIM工艺

3、尤其适合成型大型小批量的零件。PU（聚氨酯）树脂首先 （Bayer）（PU工 ） 于1937年发 ， 有 年。聚氨酯具有 度高, , , , 温 和 , 化学 的currency1 “特“.聚氨酯树脂成的 有fi塑料,fl 体, 料, ,合成”材料 种,应 于 ，, 工 门, 种年,在材料工 中 有 的 ， PU的 量 于PP,ABS,PVC. 世纪30年代 世来,的应 ,量年 ,发展 速. RIM工艺的 “（ 的， 大 来 ）：1, 开发 期, 开发成 get your product to the market quickly at much low risk于RIM工艺的 压注射 , 模

4、具的 ,模具通 树脂 材料, 其成 只 于注塑模具的很少一 分,其 工 期更是注塑模具 拟的,特别适合於 流程生和样生,可大大 开发 期和节省 开发成 ,快速进入市场 有先；RIM tooling can make large and complex, 3-dimensional parts at a fraction of the tooling investment of a comparable injection molding tool because such a low-viscous material exerts very little stress on the tool,

5、and allows for ease of modification in economical challenging time. It allows you to get your product to the market quickly and at much lower risk than the tooling needed forinjection molding.2,适合生大型、小批量且高质量的 Excellent choice for larger plastic parts produced in short run or low volumeproduction qua

6、ntities.RIM工艺 设计更 体现设计者的奇思妙想, 于反应原料的度 ,流动 ,可在压力很小的情况下成型复杂的零件, 成型大”积的壳体具有 可 拟的 势,壁厚变化范围 大,同一模塑件的横截”可从6mm到28mm间变化,这是其他工艺所 拟的, 可整体成型壁厚变化大的 提高 的 质可靠 ;其 尺寸稳定,外表美观（可达A级曲”）, 冲击 腐蚀 （可达到PC/ABS的 ）;通过调整原料的配 可作成表层坚硬的聚氨酯 构的fi塑料密度 同的 ,满足客户的各种需 ; Designers have more creative ideas with RIM (Reaction Injection Mold

7、ing) because it can mold thin and thick walls easily in the same part because of the excellent flowability of the materials and the part shrinks a slight amount during the molding process,inserts, ribs and bosses can be molded in the part without sink marks.PU-RIM parts are durable,chemically resist

8、ant,wear resistant,low weight and have high insulation values,and they can be rigid and solid like an injection molded ABS or they can be a structural foam or elastomeric like rubber.3, 封装镶嵌件工艺简单 Superb encapsulation ability 很多种嵌入件都可在注塑RIM材料 放入模具中,这样,在成型过程中RIM材料就完成了嵌入件的封装,钢 合金的 构框架,子传感器,路板,池,天线,磁铁,玻

9、璃,金属 件都可 RIM工艺封装,进而减少甚 是消除二 工节,这样可：保护您的 敏感元件免受灰尘, 污,化学药 的腐蚀污染； 您的 可在潮湿甚 是水中工作； 您的 度,保护 件免受冲击 减缓冲击带来的损害；这样从而 您的 可在更为恶劣的 下工作。Insert molding and encapsulation of delicate components is much easier with Reaction Injection Molding (RIM) because pressures and temperatures are low. RIMprovides for reliable

10、, structural one-piece solutions wherever added functionality is needed or where sensitive equipment needs protection from the environment. Components to be encapsulated are fully or partially surrounded by the molded part which provides for the structural and cosmetic properties of thefinished unit

11、. Reinforcements or attachment hardware, electronic components, magnets, batteries or antennas can be molded right into the RIM part.This can reduce your assembly costs, make assemblies tamper-proof or solve sealing problems for you.4,表” 装 且模 工艺 Superior cosmetic appearance for visibly critical appl

12、icationsPU-RIM零件表” 装 , 装工艺为 ,在RIM工艺中,可在注射 将 和聚氨酯 在模具中,在成型过程中和聚氨酯材料 合为一体,从而在模具 完成了零件的装 ,大大 了二 的 提高后 理 率。PU-RIM parts have good performance in decorating,we can deliver your parts complete with silk-screened or pad-printed letters and logos or what your expectations,but one of the largest costs of pai

13、nted plastic parts is the painting and finishing process,in RIM process,we can painting the mold cavity immediately prior to injecting the polyurethane materials,during the molding process the coating chemically bonds to the polyurethane thereby eliminates the possibility of the paint chipping and flaking-off. These options give you tremendous flexibility to decortate your parts while saving you time and money.RIM工艺 其 的 应 于 零 件 装零 件、工程 件、 设 ， 器 表、子、 设 件，工 件、化工 件、动 ,作为 金属材料的 代 ,有 可 拟的 势 。