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1、精密注塑技术 Aspects for Precise Injection Molding内容提要 Overview 精密注塑的定义 Definition Precise Injection Molding 锁模系统 Clamping Unit 锁模力 Clamping Force选择注射装置的准则 Criteria to Select the Injection Unit SELOGICA 控制器 SELOGICA Controller模具设计 Mold Design 模具温度控制 Mold Temperature Control2 Copyright by ARBURG / Nov. 200
2、6精密注塑的定义 Definition Precise Injection Molding 小的尺寸和公差 轻的部件重量 为特定产品配备注塑设备 灵活的机器配备（一台机器可适用于 多种模具) 稳定的质量，高的重复性 Small part dimension and tolerance Low weight Adaptation of machine performance to the parts Flexible machine configuration (many molds suitable for one machine) Stable quality, reproducibilit
3、y 3 Copyright by ARBURG / Nov. 2006锁模系统 Clamping Unit合模系统起重要的作用 动模板是稳定而经过证实的箱 型结构 长而精确的导向 模板平行度的调节 50 吨 范围内 0.05 mm 极高的刚度For precise injection molding, the clamping take over a very important part. movable platen as stable and proven box- type platen long and precise guiding of the movable platen ad
4、justable parallelism up to 50 to. Machines 0.05 mm high rigidity4 Copyright by ARBURG / Nov. 2006锁模力 Clamping Force精密注塑的另一个重要因素是锁模力。 原因是： 模腔更好的排气 （90%的空气从分型面排出） 减少机器和模具的磨损 节省能源One other important aspect for precise injection molding is the clamping force.Reasons for that are: Much better venting of
5、the cavities during injection. (ca. 90% of the air inside the cavity escape over the parting line) To prevent machine and mold from unnecessary wear. Saving energy5 Copyright by ARBURG / Nov. 2006锁模力 Clamping Force怎样计算锁模力锁模力 = 单位锁模力 X (产品投影面积 + 流道投影面积）如果有滑块，需要将滑块投影面积的 30% 加入产品投影面积How to calculate th
6、e clamping force ?If the mold contains sliders! You have to add 30% of the projected slider area to the projected area of molded part.6 Copyright by ARBURG / Nov. 2006锁模力 Clamping Force单位锁模力的确定可使用以下图表 To define the necessary specific clamping force, use one of the pictures below. For standard partsf
7、or thin walled parts with long flow paths7 Copyright by ARBURG / Nov. 2006锁模力 Clamping Force举例 Example: 接插件 Connector PA6长度 Length: 6 cm 宽度 Width: 1.5 cm 浇道投影面积 Proj. area sprue: 8 cm2 单位锁模力 Spec. clamping force: 6 kN/cm2 模穴数 8 cavities8 Copyright by ARBURG / Nov. 2006选择注射单元规格的准则 Criteria to Select
8、the Injection UnitShot weightCycle timeMaterialInjection pressure9 Copyright by ARBURG / Nov. 2006每一机器尺寸Each machine size三个注射单元3 injection units三个料筒规格3 cylinder sizes选择注射单元规格的准则 Criteria to Select the Injection Unit模块化 Modularity10 Copyright by ARBURG / Nov. 2006选择注射单元规格的准则 Criteria to Select the In
9、jection Unit注射单元的欧洲橡塑机械协会 (EUROMAP)规格表示注射单元的最大注 射功。计算方法最大注射压力 X 最大行程容量 / 1000举例 按注塑机 320 C 600-250 规格表最大注射压力(35 mm 螺杆）： 1820 bar最大行程容量 144 ccm1820 bar X 144 ccm /1000 250The size of the injection unit is according to EUROMAP and indicates the working performance of the injection unit. The working pe
10、rformance is calculatemax. spec. injection pressure x max. stroke volume / 1000Example: According to the technical data of 320 C 600-250 Max. Injection pressure (screw diameter 35mm) = 1820 bar Max. Stroke volume = 144 cm31820 bar x 144 cm3 / 1000 25011 Copyright by ARBURG / Nov. 2006选择注射单元规格的准则 Cri
11、teria to Select the Injection Unit注射功 Working performance! 相同螺杆直径，但不同注射压力! Same screw diameter but different max. injection pressure12 Copyright by ARBURG / Nov. 2006选择注射量的准则 Selection criteria shot volume最大计量容量max. dosage volume20 80 %最佳工作范围 opt. working range 10 20 % bzw. 80 90 %可接受的范围 conditional
12、 suited 90%不推荐的范围 not recommended选择注射单元规格的准则 Criteria to Select the Injection Unit13 Copyright by ARBURG / Nov. 2006选择注射单元规格的准则 Criteria to Select the Injection UnitExample: Connector (PA6), 8 cavities, 26.5 g shot weight Results according the list below: (1) The injection volume must be on average
13、25% greater than the volume of the injected part (incl. sprue) due to shrinkage during solidifying and due to the compression of the melt during injection.Injection unit100100250250 Screw diameter20 mm25 mm30 mm40 mm Max. injection volume31 cm349 cm3106 cm3188 cm3 Percentage of capacity 95%60%28%16%
14、14 Copyright by ARBURG / Nov. 2006选择注射单元规格的准则 Criteria to Select the Injection UnitExample: Connector (PA6), 8 cavities, 26.5 g shot weight 2nd example, calculation with shot weightResults according the list below: Injection unit100100250250Screw diameter20 mm25 mm30 mm40 mm Molded part weight26 g41
15、 g89 g158g Percentage of capacity 100%64%30%17%15 Copyright by ARBURG / Nov. 2006选择注射单元规格的准则 Criteria to Select the Injection Unit滞留时间准则 滞留时间 = 塑胶进入料筒到离开喷 嘴的时间PE,PP,PS: 最少 30 秒 (大于 40 秒 为好)PA, POM, PBT: 最少 60 秒 (75 秒为好)Selection criteria dwell time dwell time = from the entree of material into the c
16、ylinder until the exit out of the nozzles e.g. PE, PP, PS : min. 30 s (better 40 s)e.g. PA, POM, PBT : min. 60 s (better 75 s)16 Copyright by ARBURG / Nov. 2006选择注射单元规格的准则 Criteria to Select the Injection UnitExample: Connector (PA6), 8 cavities, 26.5 g shot weight (29.31 cm3)Result according to the list below, dwell time for PA6 min. 60 sec.Injecti
