Shanghai Daoqin Plastics Co., Ltd.

1. rigid machine product 跑披锋（ flash ）, production time rear product short shot causes and solutions.

rigid machine injection molding machine material tube/pipe inner due to add hot time long, viscosity low, flow property good, product easy 跑披锋, production time rear due to 熔胶不断 hot amount belt/tape 走, formed 熔胶不足, viscosity large, flow property 差, make product short shot. in production time rear, improve/increase material tube/pipe temperature degree solution.

2. in production process in, product short shot, has increase large pressure and speed degree 都无效, is what?

production time rear due to 熔胶不断 hot amount belt/tape 走, formed 熔胶不足, viscosity large, flow property 差, make product short shot. improve/increase material tube/pipe temperature degree solution.

3. product causes and solution methods.

product is due to non-uniform, formed product pressure 不匀, make product 椭圆, using/adopting 三点入胶, make product uniform.

4. precision product for mold requirements.

requirements mold material property good, elastic deformation small, hot 涨系数 small.

5. product resistant acid experiment/testing 目.

product resistant acid experiment/testing is is testing product internal stress, and internal stress force 点位置, 以便消 remove product internal stress.

6. product in metal parts force easy cracking causes and solution methods.

product in parts, in injection molding due to hot 泪盈眶熔胶遇 to cold parts, formed internal stress, make product strong/high degree decline, easy cracking. in production 时, for parts preheating 处理.

7. mold gas combined property and selection methods.

mold gas combined 理, non 但起不 to gas 效果, 反而会造 formed product deformation or dimensions 变化, therefore mold gas need combined 理. selection mold gas 点, in product most rear 走满胶 方 and product gas 烧 方开排 gas.

8. product easy causes and solution methods.

product easy is product use water material and material more formed product easy 脆裂, or is material in material tube/pipe inner time long, formed material aging, make product easy 脆裂. increase new material ratio/proportion, decrease/reduce water material recycling use 次数, generally can ultra- 三次, 避免胶 material in material tube/pipe inner long time 停留.

9. add glass fiber (GF) product easy 出现泛纤 causes and solution methods.

is due to temperature degree low or mold temperature degree low, pressure 不足, formed glass fiber (GF) in inner can and plastics very good combined, make 泛纤出现. add high material temperature degree, mold temperature degree, increase large pressure.

10.进 material temperature degree for product effect/influence.

进 material temperature degree high or low, 都会造 formed machine material unstable, make add material amount unstable, effect/influence product dimensions and appearance.

11. transparent product has causes and solution methods.

transparent product has 白点昌因 is product inner cold formed, or material inner has 灰尘造 formed. improve/increase temperature degree, add cold material 井, raw materials attention/notes 保存, anti 止灰尘进入 .

12. what is injection molding machine injection shot can force.

injection shot can force PW=射击出 pressure （kg/cm2）× injection shot 容积（cm3）/1000

13. what is injection molding machine injection shot force?

injection shot force PW（KW）= injection shot pressure （kg/cm2）× injection shot rate （cm3/sec）×9.8×100%

14. what is injection molding machine injection shot rate?

injection shot rate V（cc/sec）=л/4×d2×rd2: material tube/pipe 直径r: material density

15. what is injection molding machine 射胶推 force?

射胶推 force F（kgf）=л/4（D12-D22）×P×2D1: inner 径D2: active outer 径P: system pressure

16. what is injection molding machine pressure?

射胶 pressure P（kg/cm2）=[л/4×（D12-D22）×P×2]/（л/4×d2）

17. what is injection molding machine can force?

塑化 can force W（g/sec）=2.5×(d/2.54)2×(h/2.54)×N×S×1000/3600/2h= screw front deep （cm）S= raw materials density

18. what is system pressure? and injection molding pressure has what is the difference?

system pressure （kg/cm2）=油 pressure in setting most high as pressure, injection molding pressure is injection molding machine pressure, 两者不 versus and other.

19. injection molding machine liquid pressure use requirements:

（1）适当 viscosity and good viscosity property can

（2）良 good lubricated property and anti property

（3）良 good chemical stability property, easy gas formed 胶质

（4）搞 foam property good

（5） for machine parts and plant/unit property need small

（6）燃点（ flash point ） requirements, solid need low.

当 system as ring temperature degree relatively high 时, using/adopting relatively high viscosity 油, 反之, using/adopting relatively low viscosity 油, system as pressure relatively high 时, using/adopting viscosity relatively high, is in high pressure, relatively difficult, is main/primary issues;

反之, system as pressure relatively low, using/adopting viscosity relatively small 油, liquid pressure system as parts speed degree high 时, liquid speed high, this pressure loss will increase, 而泄漏 amount versus for decrease/reduce, using/adopting viscosity relatively low 油, 反之, as parts speed degree low 时, using/adopting viscosity relatively high 油.

松退 positive 确位置= 胶圈移动位置+ screw 越位距离.

松退位置 setting large, formed material oxygen, make material oxidation and generate bubbles. setting small, make material inner pressure large, force high make material separation understanding, 射嘴流涎. 位置误差不 can ultra- 0.4mm.

熔胶位置= product weight /（ most large 行程/ most large amount ）

can thick type material 芯部, made formed pipe fittings, can 节省材 material, shrink short cycle time.

in injection molding in using/adopting gas can make pressure uniform distribution, plastics cooling and solid 化时, gas can through for plastics shrinkage 进行补偿.

reduce products internal stress, from improve/increase outer stability property, remove deformation and warpage phenomenon.

due to in hot product shrinkage 不均衡, formed active outer in small, large, in can can using/adopting dispersion hot fast copper material 做, mold in product in separation gas.

due to product surface in force, formed screen printing rear cracking. increase mold temperature degree, decrease small force, can use methods remove force.

射胶 pressure and holding pressure pressure large water 口边残存 internal stress, formed product easy 断, amount decrease small pressure and holding pressure pressure, improve/increase mold temperature degree solution.

due to 柱子存 in water formed product assembly easy 暴裂, mold increase gas, improve/increase mold temperature, add fast speed degree decrease water water 线.

product deformation main/primary is hot shrinkage balanced formed product deformation, or due to product internal stress function lower make product deformation.

raw materials drying 不够, product in thick thin phenomenon, mold gas defect, raw materials easy separation understanding can can formed product bubbles. separation drying, increase large mold gas, amount decrease/reduce thick thin phenomenon.