ARBURG精密注塑技术

The size of the injection unit is according to EUROMAP and indicates the working performance of the injection unit.
The working performance is calculate
30/35/40 23.3/20/17.5 150 106/144/188 89/121/158 2470/1820/1390 112/154/202
!!! 相同螺杆直径，但不同注射压力
!!! Same screw diameter but different max. injection pressure
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选择注射单元规格的准则 Criteria to Select the Injection Unit
Material
Shot weight
Injection pressure
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© Copyright by ARBURG / Nov. 2006
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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.
•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 Control
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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
© Copyright by ARBURG / Nov. 2006
© Copyright by ARBURG / Nov. 2006
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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.
1820 bar x 144 cm3 / 1000 250
© Copyright by ARBURG / Nov. 2006
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选择注射单元规格的准则 Criteria to Select the Injection Unit
注射功 Working performance
Technical data 320 C Machine type EUROMAP size Injection unit Screw diameter Effective screw length Screw stroke Theoretical stroke volume Molded part weight Injection pressure Injection flow
100 25 mm 49 cm3 60%
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
• movable platen as stable and proven boxtype platen • long and precise guiding of the movable platen • adjustable parallelism up to 50 to. Machines 0.05 mm • high rigidity
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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
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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 the clamping force ?
Cycle time
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选择注射单元规格的准则 Criteria to Select the Injection Unit
模块化 Modularity
每一机器尺寸 Each machine size
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三个注射单元 3 injection units
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 cavities
clamping force 6 kN/cm2 (1.5cm 6 cm8 cavities 8cm2 proj. spruearea) clamping force 6 kN/cm2 80 cm2 clamping force 480 kN or 48 to.
max. spec. injection pressure x max. stroke volume / 1000 Example:
According to the technical data of 320 C 600-250 Max. Injection pressure (screw diameter 35mm) = 1820 bar Max. Stroke volume = 144 cm3
Reasons for that are: • Much better venting of 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 energy
Example: Connector (PA6), 8 cavities, 26.5 g shot weight
Shot volume Shot w eight 26.5 g 23.45 cm3 specific weight 1.13 g/cm3
Injection volume 1.25 shot volume (1) 1.25 23.45 cm3 29.31 cm3
最佳工作范围 opt. working range 可接受的范围 conditional suited 不推荐的范围 not recommended
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选择注射单元规格的准则 Criteria to Select the Injection Unit
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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
picturrts
Results according the list below: Injection unit Screw diameter Max. injection volume Percentage of capacity
100 20 mm 31 cm3 95%
Technical data 320 C Machine type EUROMAP size Injection unit Screw diameter Effective screw length Screw stroke Theoretical stroke volume Molded part weight Injection pressure Injection flow
三个料筒规格 3 cylinder sizes
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选择注射单元规格的准则 Criteria to Select the Injection 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 ccm 1820 bar X 144 ccm /1000 250
clamping force specific clamping force (projected area of all molded part proj. area sprue)
If the mold contains sliders! You have to add 30% of the projected slider area to the projected area of molded part.
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
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选择注射单元规格的准则 Criteria to Select the Injection Unit
选择注射量的准则 Selection criteria shot volume
最大计量容量max. dosage volume
20 – 80 % 10 – 20 % bzw. 80 – 90 % < 10 % bzw. > 90%
• Low weight
• Adaptation of machine performance to the parts
• Flexible machine configuration (many molds suitable for one machine)
• Stable quality, reproducibility
for thin walled parts with long flow paths
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锁模力 Clamping Force
举例
Example:
接插件 Connector PA6
长度
Length: 6 cm
宽度
Width: 1.5 cm
320 C 500-100 500-100
320 C 600-250 600-250
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