ARBURG精密注塑技术

© Copyright by ARBURG / Nov. 2006
5
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 ?
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 Control
Injectionv olume 1.25 shot v olume (1) 1.25 23.45 cm3 29.31cm3
Results according the list below: Injection unit Screw diameter Max. injection volume Percentage of capacity
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%
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
1820 bar x 144 cm3 / 1000 250
© Copyright by ARBURG / Nov. 2006
11
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 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
For precise injection molding, the clamping take over a very important part. • 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
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
模块化 Modularity
每一机器尺寸
三个注射单元
三个料筒规格
3 cylinder sizes
10
Each machine size
© Copyright by ARBURG / Nov. 2006
3 injection units
选择注射单元规格的准则 Criteria to Select the Injection Unit
© Copyright by ARBURG / Nov. 2006
4
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 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
© Copyright by ARBURG / Nov. 2006
2
精密注塑的定义 Definition Precise Injection Molding
• 小的尺寸和公差
• 轻的部件重量
• 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, reproducibility
© Copyright by ARBURG / Nov. 2006
6
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 parts for thin walled parts with long flow paths
8ห้องสมุดไป่ตู้
选择注射单元规格的准则 Criteria to Select the Injection Unit
Material
Shot weight
Injection pressure
Cycle time
© Copyright by ARBURG / Nov. 2006
9
选择注射单元规格的准则 Criteria to Select the Injection Unit
© Copyright by ARBURG / Nov. 2006
7
锁模力 Clamping Force
举例 Example:
接插件 Connector PA6
长度 宽度 浇道投影面积 单位锁模力 模穴数 Length: 6 cm Width: 1.5 cm Proj. area sprue: 8 cm2 Spec. clamping force: 6 kN/cm2 8 cavities
• 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
© Copyright by ARBURG / Nov. 2006
3
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
The size of the injection unit is according to EUROMAP and indicates the working performance of the injection unit.
The working performance is calculate
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
!!! 相同螺杆直径，但不同注射压力
!!! Same screw diameter but different max. injection pressure
© Copyright by ARBURG / Nov. 2006
12
选择注射单元规格的准则 Criteria to Select the Injection Unit
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 20 mm 31 cm3 95%
100 25 mm 49 cm3 60%
250 30 mm 106 cm3 28%
250 40 mm 188 cm3 16%
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
13
选择注射单元规格的准则 Criteria to Select the Injection Unit
Example: Connector (PA6), 8 cavities, 26.5 g shot weight
Shot v olume Shot weight 26.5 g 23.45 cm3 specif ic w eight 1.13 g/cm3
clampingforce 6 kN/cm2 (1.5cm 6 cm 8 cavities 8cm2 proj. sprue area) clampingforce 6 kN/cm2 80 cm2 clam ping force 480 kN or 48 to.
© Copyright by ARBURG / Nov. 2006
clampingf orce specif icclampingf orce (projectedarea 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.
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