Shanghai Daoqin Plastics Co., Ltd.

injection molding has types control methods: control and time control.

行程 control:

行程 control 也叫位置 control, it is process in, in screw front 进 行程 in 设置若 dry 特殊位置点, this will 射胶行程 separation formed dry 段, using/adopting different pressure, speed degree control 射胶.

行程 control lower 图: （ control method upper 传, parts ）

说明:

1, ① is 抽胶终点位置; ② is 熔胶终点位置; ③ is grade and grade 射胶切换位置; ④ is grade and grade 射胶切换位置, ……直 to N grade; ⑤ is N射胶 and holding pressure 切换位置; ⑥ is grade holding pressure and grade holding pressure 切换位置, ……直 to N grade; ⑦ is holding pressure 终点位置; ⑧ screw 原点位置. ⑦ and ⑧ between is 残余胶 amount, ⑧位置残余胶 amount is 0.

2, in 射胶段, 每段都会按 setting pressure, speed degree action as; in holding pressure 段, 每段都按 setting holding pressure pressure, holding pressure time holding pressure as. holding pressure holding pressure speed degree generally comparison low, has injection molding machine can holding pressure speed degree setting, has injection molding machine is anti 止不熟练者误操 as, in machine internal good, as can holding pressure speed degree 设置.

3, if setting time short, in setting time use rear, screw to 何位置, screw as 终止. therefore, setting time need setting 足够, can ensure setting 射胶, holding pressure as 如期进行.

4, 实际射胶 time and as setting injection molding parameters has 关, 会自动计算并显示. setting time large 于实际射胶 time 时, setting time decrease 实际射胶 use rear, its time is holding pressure. holding pressure time excellent separation to grade holding pressure use, grade holding pressure use time again separation to grade holding pressure use, 依次例推, has time full separation to most rear grade, most rear grade holding pressure is use setting holding pressure time. if time 不够, holding pressure to grade time use 完即止, its holding pressure 设置都不起 function.

5, 射胶行程 设置应该 is from large to small, 射胶开始位置即 is 熔胶终点位置, has 抽胶（ or 倒索）则 is 抽胶终点位置, machine 会自动记忆并设置 is 起点位置, as is 不需输入起点位置. as 者输入 第一 行程位置即 is grade 射胶完 formed 位置（也 is grade 射胶开始位置）, grade pressure, speed degree control from 熔胶终点（ or 抽胶终点）位置 to 射胶行程第一 输入位置 between as. if as 者输入 行程 parameters 错误, will rear 面 行程 parameters setting ratio front large, machine 会忽略, 自动进入 to lower grade 射胶. ratio 如熔胶终点 is 60, grade 射胶行程 is 50, grade 射胶行程 is 55, grade 射胶行程 is 30, machine in formed grade rear, 忽略二 grade 射胶, 直接进入 to grade 射胶, grade 射胶设置 parameters function. although 如此, as 者需明白 parameters 设置 意义, can will rear 面 行程 parameters ratio front also large.

6, control is screw 实际位置 achieve pressure, speed degree 转换, if screw can to setting 位置, 则设置 pressure, speed degree parameters function. also is upper 面 例子, if screw front to 52时 already 经射满胶, screw method again front 行, rear has 设置都不起 function, machine 会以一 grade pressure, speed degree, setting time 进行射胶, holding pressure as, to time use is 止.

7, 实际射胶 time, screw machine 会显示, as 者眼睛需盯紧 this parameters, understanding screw 实际动 as 情况并 for parameters 即时修 positive.

time control:

time control versus for control need simple more, 即射胶动 as and screw 行程位置 related 联, full use time control. in setting time inner, setting pressure, speed degree 进行射胶, holding pressure as, to setting time use 完转入 lower grade.

therefore, machine setting time, pressure, speed degree 进行射胶动 as. setting time, pressure 会实实 in in 执行, if already 经射满胶 screw can as, speed degree 就不会以 setting value 进行.  

行程 control and time control use combined

from upper 讲, control and time control is control methods different, product use types control methods can production, 必定也 can use types control methods production. in setting pressure, speed degree 不变 情况 lower, screw to certain 一位置时 time is for 应, therefore, types control methods its process parameters has for 应 关系. positive 常情况 lower, screw to certain 一位置, has versus amount 胶体进入 to mold in, product degree and injection molding machine screw has for 应关系.

using/adopting control 时候, generally through water sheet/plate 寻找特殊 screw 位置（也就 is product 特殊位置）, this 特殊位置找 to rear generally again as large 改变, 而 改变 versus 应行程 inner pressure and speed degree. pressure and speed degree adjustment 不会导致 screw 行程 改变, is through 该段行程 time 发生变化. using/adopting time control 时候, can through water sheet/plate to screw 位置（也就 is product 特殊位置）, rear has in pressure, speed degree, time 都不变 情况 lower, screw 行程才不会改变. need its in 任何一 parameters 发生变化, 就会导致 screw 行程 改变, need heavy new water sheet/plate 寻找特殊位置 for time. pressure, speed degree is 会经常 adjustment, 变化, this make water sheet/plate 啤不胜啤. 而行程 control 则 需啤 one-time water sheet/plate, to 特殊位置 rear can very 方便 进行 pressure, speed degree adjustment.

large type or product comparison complex product, need using/adopting more grade 射胶, in certain 特定 位置进行 pressure, speed degree 转换, therefore use control ratio use time control more 直观, more 准确.

small type or product comparison simple product, need using/adopting more grade 射胶, use time control comparison simple, 方便. ratio product very small, screw 几乎一动就 can 满胶, or product mono need pressure, speed degree 转换, this 时候就没 necessary use control more grade 射胶. （当然, control can 方便做 to ）

基于 above causes, very more injection molding 厂, especially is product comparison large type, complex production 厂, generally using/adopting control.

more grade is product for injection molding process need, non is need. positive 如一辆 automotive, in basic same lower frequency 繁换档 is milli necessary.