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1、塑料模具成型技术流程及参数介绍Mold ing tech nique procedure and parameter in troducti on 第一節成型工艺Secti on 1 mold ing tech niq ue.1成型工艺参数类型Sorts of mold ing parameter.(1) .注塑参数In jectio n parameter.a.注射量In jectio n rate.b计量行程Screw back positi onc. 余料量Cushi ond. 防诞量Suck ing back ratee螺杆转速Screw speedf.塑化量PlasticO rate
2、g预塑背压Screw back pressureh.注射压力和保压压力Injection pressure and holding pressurei注射速度In jectio n speed(2) 合模参数Clamp ing parametera.合模力Clampi ng forceb合模速度Clamp ing speedc. 合模行程.Clampi ng stroked. 开模力Opening forcee开模速度Opening speedf开模行程Opening positi ong顶出压力Ejector adva nee pressureh.顶出速度Ejector adva nee s
3、peedi顶出行程Ejector adva nee positi on2.温控参数Temperature parametera烘料温度Dry res in material temperatureb料管与喷嘴温度Cyli nder temperature and no zzle temperaturec.模具温度Mold temperatured油温Oil temperature3成型周期Moldi ng cyclea循环周期Cycle timeb冷却时间Cool timec注射时间Injection timed保压时间Hold ing pressure timee.塑化时间Pla nt ti
4、mef顶出及停留时间Knocking out and delay timeg.低压保护时间Mold protect time成型工艺参数的设定须根据产品的不同设置.Mold ing tech nique parameter setting differs depe nding on type of product 第二节成型条件设定Section 2 Molding parameter Setting按成型步骤:可分为开锁模，加热，射出，顶出四个过程.Mold ing steps: mold ope nin g/clos ing, heati ng in jecti on and knocki
5、ng out.开锁模条件：Mold ope ning parameter:快速段中速度低压咼压速度High-speedmid-speedLow pressure high pressure speed锁模条件设定：Mold clos ing parameter se tting1锁模一般分：快速-中速-低压-高压Mold clos ing: high-speed low-speed low pressure-high pressure2快锁模一般按模具情况分，如果是平面二板模具，快速锁模段可用较快速度，甚 至于用到特快，当用到一般快速时，速度设到55-75%，完全平面模可设定到80-90%,如
6、果用到特快就只能设定在45-55%，压力则可设定于50-75%,位置段视产品的深浅（或长短）不同，一般是开模宽度的1/3.In high-speed secti on, Mold clos ing speed depe nds on type of mold. For two -plate mold it can set quick andeven especially quick usually, it set speed within 55-75%. For full-plate mold it set speed withi n80-90%while using especially h
7、igh speed it set speed with in 45-55% and pressure within 50-75% positi on dista neesetting differs depending on the volume of product and usually it can be set 1/3 of mold ope ning positi on.3中速段，在快速段结束后即转换成中速，中速的位置一般是到模板（包括三板模， 二板模）合在一块为止，具体长度应视模板板间隔，速度一般设置在30%-50%间，压力则是20%-45%间.In mid-speed secti
8、 on: Mold clos ing speed cha nges into mid-speed after high-speed section finish. Mid-speed startpositi on is where two plates meet （i nclude three-plate mold and two-platemold ） Dista nee of mid-speed is up todista nce of two plates plate it speed with in 30-50% and pressure 20-45%.4低压设定，低速设定一般是在模板
9、接触的一瞬间，具体位置就设在机台显示屏显 示的一瞬间的数字为准，这个数字一般是以这点为标准，即于此点则起不了高压,高于此点则大，轻易起高压设定的速度一般是15%-25%, 视乎不同机种而定，压力一般设定于1-2%, 有些机则可设于5-15%，也是视乎不同机种不同.Low-pressure section: Mold closing sets low-pressure when plates meeting. This positi on is set to the data ofmachine screen on this time. This point is the gage of the
10、 data. Data lower the point there is no high-pressure.Data higher the point there is high-pressure easily. It set speed within 15-25% and pressure withi n 1-2%depe nding on type with in 1-2% depe nding on type of in jecti on mold ing mach ine.5高压设定，按一般机台而言，高压位置机台在出厂时都已作了设定，相对来讲，是 不可以随便更改的,比如震雄机在50P.
11、速度相对低压略高,大约在30-35%左右，而压力则视乎模具而定，可在55-85%中 取,比如完全平面之新模，模具排气良好，甚至于设在55%即可，如果是滑块较多，原来生产时毛边也较多,甚至于可设在 90%还略显不足.High-pressure sectio n: To n ormal in jecti on moldi ng mach ine, high-pressure positi on had bee n set beforethey were sent to customer. It can not be modified. For example high-pressure posit
12、ion of CHENHSONG machi neis 50P.The speed of high-pressure secti on is about 30-35% and higher tha n that of low-pressure.The pressure is up to mold, it can set withi n 55-85% For full-pla te mold, its eject air well,it can set pressure 55% .If mold has a lot of slides and flash rate high in product
13、i on, pressure can set 90%.二熔胶段工艺Plastic Tech nique1再复杂的熔胶旋转过程最多不会超过三段,因为熔胶本身就是存在于把胶熔进 料筒的过程，如果原料粘度大，熔胶压力则大，但速度则应取决于原料的分解温度，熔胶速度越快，原料中的剪切力则会越大，料 管温度则越高，局部原料产生分解的可能性则会越大，故一般熔胶会采用中速为宜，如45%-75%,熔胶同时会碰到一个比较重要的环节， 那就是背压的使用,产品精度要求越大，背压的使用则更大，背压可使原料分子间结构更紧密，成型出的产品则尺寸更稳定, 外观越好当然，背压太大，则会产生流涎，所以背压的使用又应考虑到其它原因
14、.Plastic should lower 3 steps, because plastic is a step to add melt resi n material to cycli nder ,Higher stick of res in material ,higher screw back pressure. Screw speed differs depe ndingon decompos ing temperature of res in material ,Higher screw speed ,Higher trim force of resi n,higher cycli
15、nder temperature. Some res in material may decomposes so it set screw speed in mid-speed such as 45-75%,In plastic step setting screw back pressure is very important, Higher screw back pressure ,higher quality of product screw back pressure make res in structure order, Molding product is beautiful and volume stable. But ,it maybe flow if screw back pressure too high .So all factors should be considered when using screw back pressure.2熔胶过程还有一个比较重要的环节，那就是松退，松退分前松退和后松退，其作 用一般是为了防止流涎和抽丝，设定值速度和压力都在20%-50%间，设定的
