精密注塑技术一

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选择注射单元
Selection of the Injection Unit j
Shot weight 注射量
Material 材料
Injection Accelerat. & speed 加速度和射速
Injection pressure 射压
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精密注塑的概念
Definition of Precise Injection Molding
• 小的尺寸和公差 • 轻的部件重量和小的公差 • 为特定产品配备注塑设备 • 稳定的质量，高的重复性
• Small part dimension and small tolerance • Low weight and small tolerance • Adaptation of machine performance to the parts • Stable quality, high reproducibility
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锁模系统
Clamping Unit p g
模板平行度 • 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，最好值 +0.03mm • 通过校准可调回出厂值 • 极高的刚度
Parrallelity of mould platens • movable platen as stable and proven box type box-type platen • long and precise guiding of the movable platen • adjustable parallelism up to 50 to. Machines 0.05 mm， best value +0.03mm 0.03mm • re-adjustable through calibration • high rigidity
如果有滑块，需要将滑块投影面积的30%加入产品投影面积
With sliders, adding 30% of the projected slider area to the projected area of molded part.
© Copyright by ARBURG / 09. 2010
© Copyright by ARBURG / 09. 2010
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锁模力
Clamping Force
怎样计算锁模力 / Calculation of the clamping force
锁模力 = 单位锁模力 X (产品投影面积 + 流道投影面积）
clamping force = specific clamping force × (projected area of all molded part + proj. area sprue)
注射功率 / Working performance
Technical data 320 C Machine type EUROMAP size Injection unit Screw diameter Effective screw length Screw stroke Theoretical stroke volume Th ti l t k l Molded part weight Injection pressure Injection flow
精密注塑技术
(一)
wk.baidu.com
Precise Injection Molding
主讲:闫路顺 工程硕士
应用技术支持
内容提要
Overview
• 精密注塑的概念 • Definition of 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® 控制系统 • SELOGICA® Controller • 模具设计 • Mold Design • 模具温度控制 • Mold Temperature Control
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锁模力
Clamping Force 单位锁模力的确定
define the necessary specific clamping force, use one of the graphics below. Standard Parts / 一般零件
非结晶塑料
半结晶型塑料
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锁模力
Clamping Force
thin wall parts with long flow path / 薄壁件
L/s 系数 = 最大流道长度/最小零件壁厚
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锁模力
Clamping Force 举例 Example:
接插件 / Connector PA6
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模具保护程序
Mold protection p 不同的后续动作
Different selections for optimum adjustment
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模具保护程序
Mold protection p 模具保护的摄像监控
max. spec. i j ti pressure x max. injection stroke volume / 1000 Example: Injection I j ti molding machine ldi hi 320 C 600-250 Max. Injection pressure (screw diameter 35mm) = 1820 bar Max. Stroke volume = 154 cm3 1820 bar x 154 cm3 / 1000 ≈ 250
Cycle time 循环周期
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选择注射单元
Selection of the Injection Unit j
模块化
Modularity
每一机器尺寸 Each machine size
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长度 / Length: 宽度 / Width: 浇道投影面积： Proj. area sprue j p 单位锁模力： Spec. clamping force 模穴数 / cavities： 6 cm 1.5 cm 8 cm2 6 kN/cm2 8
锁模力= 6千牛/ 6cm x (1.5cm x 6cm x 8腔 + 8cm 浇口投影面积）= 480千牛 = 48吨
举例:
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 154 ccm 1820 bar X 154 ccm /1000 ≈ 250
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选择注射单元
Selection of the Injection Unit j
最佳工作范围 optimal working range p g g 有条件可接受的范围 conditional suited 不推荐的范围 not recommended
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选择注射单元
Selection of the Injection Unit j
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clamping force = 6 kN/cm 2 × (1.5 cm × 6 cm × 8 cavities + 8cm 2 proj. sprue area) clamping force = 6 kN/cm 2 × 80 cm 2 p g clamping force = 480 kN or 48 to.
Precise controlled clamping force. • Much better venting of the cavities during injection. (ca. 90% of the air inside the cavity escapes over the parting line) • T prevent machine and mold f To t hi d ld from unnecessary wearing. i • Saving energy
三个注射单元 3 injection units
三个料筒规格 3 cylinder sizes
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选择注射单元
Selection of the Injection Unit j 最大注射功率 - 欧洲橡塑机械协会 (EUROMAP)标准
最大注射压力 X 最大行程容量 / 1000
Injection Unit Power – EUROMAP
Integration of camera system for optimum mold protection
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锁模力
Clamping Force 精确控制的锁模力。 • 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
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注射重量或体积
The injection weight or volume
滞留时间
The dwell time
塑化功率
The plasticizing throughput
注射加速度和最大速度
injection acceleration and max. speed
© Copyright by ARBURG / 09. 2010
© Copyright by ARBURG / 09. 2010
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电动机的模具保护
Mold protection electrical machines p 始于模具保护段，监控合模力和时间，低的合模力。
Start via stroke, monitoring via force and time，Limited by low forces stroke
!!! 相同螺杆直径，但不同注射压力和注塑量
!!! Same screw diameter but different max. injection pressure and shot weight
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选择注射单元
Selection of the Injection Unit j
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选择注射单元
Selection of the Injection Unit j 选择注射量 Selection criteria shot volume
最大计量容量 / max. dosage volume
20 – 80 % 10 – 20 % bzw. 80 – 90 % < 10 % bzw. > 90%
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液压机的模具保护
Mold protection hydraulic machines p y 始于模具保护段，监控合模时间，低的合模力。
Start via stroke, monitoring via time, Limited by low forces
320 C 500-100 500-100 mm L/D max. mm max. ccm max. g/PS max. bar max. ccm/s 20/25/30 25/20/16.7 100 31/49/70 26/41/59 2500/2240/1550 80/126/180
320 C 600-250 600-250 30/35/40 23.3/20/17.5 150 106/144/188 89/121/158 2470/1820/1390 112/154/202