【正文】 e. The parting surfaces of a mould are those portion of both mould plates, adjacent to the impressions, which butt together to form a seal and prevent the loss of plastic material from the parting line can have any shape, many moldings are required which have a parting line which lies on a nonplanar or curved surface,but for ease of mold manufacturing,it is preferable to have it in one parting line is always at the widest circumference of the product,to make ejection of the product from the mold some shapes it may be necessary to offset the P/L,or to have it at an angle,but in any event it is best to have is so that itan be easily machined,and often ground, to ensure that it shuts off tightly when the mold is clamped during the parting line is poorly finished the plastic will escape,which shows up on the product as an unsightly sharp projection,which must then be removed。s essentially a large screw housed in a heater which moves the plastic closer to the mold. As the screw turns, the plastic traverses the barrel and reaches a molten state. Only when it39。re talking about here. Most people have probably seen runners before and not realized it. The most likely place to see them are in model airplane/car kits as the individual ponents are left attached to the runner system. Typically the runners are ejected into a chute below the mold or else they will be picked out of the mold by a robotic arm and dumped into a regrinder. The regrinder chops the runners into bits and prepares them to be moved back into the dryer. Though, once plastic has been heated, it degrades a bit and some molding processes will 10 not allow for regrind to be mixed back in with virgin material as it can cause problems with the final part. In cases like this the regrind is used elsewhere or it is discarded pletely. Shrinkage plays a crucial role in molding and most plastic shrinks 20% as it cools. In order to bat this phenomenon in critical plastic pieces (not really toys) it is up the mold designer to build this factor into his design so that the finished parts will meet the original product design specifications. Ejector pins are part of the mold itself and are used to push the molded parts from the cavity once the mold is opened. This ejecting process is controlled by the molding machine. The molding cycle is basically close shoot open eject. The mold is clamped into the machine with the front half remaining stationary (on the barrel side of the machine) and the back half being the movable half. Also on this movable half are the ejector pins that push the molded parts from the cavity. The parting surfaces of a mould are those portion of both mould plates, adjacent to the impressions, which butt together to form a seal and prevent the loss of plastic material from the all molds open up, the parts are stuck to the back half of the mold so that they can be ejected with the builtin pins. These are related to the introduction of the injection mold. 。s connected to the runner. There are ways around having sprues and runners, but it39。s initial holding chamber. This chamber is actually a small hopper on the back of the barrel of the machine。 以上就是關(guān)于注 射 模具的相關(guān)介紹 。 一個(gè)成型周期實(shí)際上就是合模 注射 開模 頂出。收縮在成型中影響深遠(yuǎn)，大部分塑料冷卻后會(huì)收縮 20%。一般地，水口料被頂出，落進(jìn)安放在模具下面的落料裝置（通過一個(gè)斜坡傳送通道），或者被機(jī)械手取出，然后投入粉料機(jī)。實(shí)際上，在噴嘴到模腔之間的冷卻 射 料是 “ 主流道 ” ，但它和流道是連在一塊的。 當(dāng)螺桿前端 壓室注滿 射 料時(shí)，螺桿被迫后退，斷開限位開關(guān)而開動(dòng)液壓缸，從而向前推動(dòng)螺桿，將熔融 射 料注射到閉合的模具型腔中。料斗實(shí)際上是一個(gè)小的漏斗，它被安裝在機(jī)臺(tái)料筒的后面。 與其他的進(jìn)料系統(tǒng)相比 ,它有一個(gè)很小的橫截面積 。 流動(dòng)的通道就是流道 ,它把注 射 機(jī)的噴嘴和模具連接了起來 ,流道是一個(gè)獨(dú)立的型腔 , 流道本身要光滑 ,以便可以阻止 射 料自由流動(dòng) 。 如果分模線設(shè)計(jì)不好 ,射 料將會(huì)溢出來 ,那樣產(chǎn)品就會(huì)有一個(gè)非常大的凹陷 ,那樣的產(chǎn)品肯定會(huì)被拆除 ,否則那樣的產(chǎn)品是不能夠使用的 。 模具的分型面是兩模板接近型腔的那些部分，它們對(duì)接一起形成油封并且避免型腔里 射 性材 料的損失。型腔和型芯分別決定著成型的外部和內(nèi)部的形狀 ,而它們的整體決定著整個(gè)成型的方式 。 通常情況下 ,型腔是位于注 射 一邊的那半模具上 ,而型芯是位于可以移動(dòng)的那半模具上的 。 與型腔空間所匹配的部分稱為型芯 。它僅僅是注入多個(gè)型腔比注入一個(gè)型腔多花了一點(diǎn)的時(shí)間 。 3．注 射 模具的組成 型腔空間 3 型腔空間是在模具中的一個(gè)形狀 ,當(dāng)注 射 的材料充滿這個(gè)空間的時(shí)候 ,它就會(huì)呈現(xiàn)出和型腔空間一樣的形狀 。 隨著產(chǎn)品注射的完成 ,模具就必須開模 。注 射 時(shí)，模具裝夾在注 射 機(jī)上，熔融 射