https://www.avient.com/sites/default/files/2020-09/gravi-tech-processing-guide-chinese.pdf
4.
检查热电偶和加热圈
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增大浇口尺寸,以增大流速,降低模压应力
缩痕
塑件太厚 减小壁厚 减小加强筋厚度
熔体太热
降低喷嘴和料筒温度
降低模具温度
材料量不足
增加射胶量
提高注塑速度
提高升压压力
增大浇口尺寸
问题 原因 解决方案
6 Gravi-Tech
问题解决建议(续)
飞边
注塑压力过高
降低注塑压力
提高锁模压力
降低注塑速度
增加转换位置
材料量过多
降低升压压力
减少射胶量
降低注塑速度
熔体和/或模具太热
降低喷嘴和料筒温度
降低模具温度
降低螺杆转速
焦化
熔体和/或模具过热
降低喷嘴和料筒温度
降低模具温度
降低注塑速度
模具设计 清洁排气口,扩大并增加排气口数量 增大浇口尺寸或浇口数量
水分 验证材料在适当条件下是否干燥
喷嘴流延 喷嘴温度过高
降低喷嘴温度
降低背压
增加螺杆减压
验证材料已在适当条件下干燥
熔合缝
熔体前段温度过低
提高升压和保压压力
提高熔体温度
扩大排气口,增加排气口数量
提高注塑速度
提高模具温度
模具设计
降低注塑速度
增大浇口尺寸
执行欠注以确定充填模式,并验证正确的排气口位置
增加排气口和/或临时顶针
改变浇口位置
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https://www.avient.com/sites/default/files/2022-08/Environmental Stress Cracking Resistance _ESCR_ Design Guide %281%29.pdf
Wall Thickness (mm)
C
o
o
li
n
g
T
im
e
(
S
e
c
)
40
35
30
25
20
15
10
5
0
0 1 2 3 4
ABS
PC
Nylon 6/6
FIGURE 1 - Wall thickness vs . cooling
time of various plastics
FIGURE 2 - Designing for
wall thickness changes
FIGURE 3 - Internal and external
radius guidelines
FIGURE 4 - Coring for tight radius design
ESCR Design Guide 2
CONTOUR
Where possible, contouring the products’
exterior form, as shown in Figure 5, can help to
eliminate pooling of fluids .
A 1:1 wall thickness will
produce sink and cause stress where the ribs
connect with the main wall .
Draft on the outside of the
boss should be 1° .
https://www.avient.com/products/thermoplastic-elastomers/tpe-knowledge-center/technical-bulletins/specific-gravity
To convert cubic inches to cubic centimeters, the conversion factor is 16.4 (in^3 x 16.4 = cm ^3 and 2.54 in = 1 cm).
The part volume would be 1.5 in^3 (5x3x0.100) or 24.6 cm^3 (1.5 x 16.4).
XL9070: 24.6 cm^3 x 0.89 = 21.8 g
G7970: 24.6 cm^3 x 1.18 = 29.0 g
https://www.avient.com/resources/safety-data-sheets?page=6759
X MF-39677-02A1-4 Black
X MF-39677-02A1-5 Black
Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)
https://www.avient.com/resources/safety-data-sheets?page=4035
X TT9200-8708-0 EC Grey
X HC-6521-001-4 Natural
Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)
https://www.avient.com/resources/safety-data-sheets?page=3872
X HC 134080#SR-06357 Black
X ET 5200-0002 Tan Conc 4%
Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)
https://www.avient.com/resources/safety-data-sheets?page=2621
X ST-16319-02-01 Black
UV INNER TONE LIGHT V.4
X ST-16151-05-02 Black
https://www.avient.com/resources/safety-data-sheets?page=5961
X PPH-45G 10-4 Black
X ET 311091#SR-32770 MS31
Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)
https://www.avient.com/resources/safety-data-sheets?page=3687
RED HEADER 4
X LB-3612-1B
X LB-3612-1A
https://www.avient.com/resources/safety-data-sheets?page=4156
X MF-0000164653#SR-10207
X ET 180376#SR-12074 Blue
STEELHEAD SILVER-4