相關(guān)模具注塑加工過(guò)程中有時(shí)會(huì)出現(xiàn)一些問(wèn)題，如果不及時(shí)處理就會(huì)造成產(chǎn)品質(zhì)量問(wèn)題，從而讓廠家以及消費(fèi)者都會(huì)受到損失，比如說(shuō)出現(xiàn)噴流紋問(wèn)題，這是很多人想了解的，下面就來(lái)了解了解吧。
Sometimes there are some problems in the process of injection molding of relevant molds, if not dealt with in time, it will cause product quality problems, so that manufacturers and consumers will suffer losses, such as jet flow problem, which is a lot of people want to know, let's understand it.
注塑加工過(guò)程中出現(xiàn)的噴流紋是從澆口沿著流動(dòng)方向，彎曲如蛇行一樣的痕跡，故也叫蛇形流。那它是怎么出現(xiàn)的呢？其一，當(dāng)熔融材料高速流過(guò)噴嘴、流道或澆口等狹窄區(qū)域時(shí)，會(huì)突然進(jìn)入開放的、相對(duì)較寬的區(qū)域。熔體在流動(dòng)方向上像蛇一樣彎曲，并在與模具表面接觸后冷卻。如果這部分材料沒(méi)有與隨后進(jìn)入型腔的樹脂很好地融合，則會(huì)在產(chǎn)品上形成噴射圖案。
In the process of injection molding, the jet flow pattern is curved like a snake along the flow direction from the gate, so it is also called the snake flow. So how did it come about? First, when the molten material flows through a narrow area such as nozzle, runner or gate at high speed, it will suddenly enter an open and relatively wide area. The melt bends like a snake in the direction of flow and cools upon contact with the die surface. If this material does not blend well with the resin that then enters the cavity, a spray pattern will form on the product.
其二，樹脂從澆口射出的速度太高。注射速度不當(dāng)，塑料進(jìn)入澆口后，在接觸型腔前沒(méi)有障礙物，飛得很遠(yuǎn)，很快冷卻，形成射流圖案。此外，還有模具設(shè)計(jì)方面出現(xiàn)了問(wèn)題，比如：澆口位置和類型不合理，尺寸太??；流道尺寸太小；澆口到型腔的截面積突然增大，流動(dòng)性不穩(wěn)定，容易產(chǎn)生射流。等等。
Second, the resin shoots out of the gate too fast. Injection speed is not appropriate, after the plastic enters the gate, there is no obstacle before the contact cavity, flies far, cools quickly, forming jet pattern. In addition, there are mold design problems, such as: the location and type of gate is unreasonable, the size is too small; Runner size is too small; The cross section area from the gate to the cavity increases suddenly, the fluidity is unstable, and the jet is easy to produce. And so on.
那么針對(duì)這個(gè)問(wèn)題，可以怎么去呢？
濟(jì)南注塑加工人員建議，模具設(shè)計(jì)時(shí)，在澆口前面加阻逆針，防止料流噴射，擴(kuò)大澆口橫截面；在成型工藝方面，調(diào)低注射速度，提高模具溫度，也能減緩與型腔表面接觸的樹脂的冷卻速率，這對(duì)防止在充填初期形成表面硬化皮，也具有良好的效果，另外要調(diào)低材料的流動(dòng)性以及降低熔體溫度。
So how can we solve this problem? Ji 'nan injection molding processing personnel suggest, mold design, in front of the gate resistance needle, prevent material flow jet, expand the gate cross section; In terms of molding process, lower injection speed and higher mold temperature can also slow down the cooling rate of the resin in contact with the cavity surface, which has good effect on preventing the formation of surface hardening skin at the initial stage of filling. In addition, it is necessary to lower the fluidity of the material and reduce the melt temperature.
注塑加工過(guò)程中為何出現(xiàn)噴流紋的問(wèn)題？以上就是問(wèn)題的相關(guān)解答了，所以要想避免類似問(wèn)題的出現(xiàn)，就要在開始注塑加工前做好準(zhǔn)備工作，比如相應(yīng)材料的檢查。更多內(nèi)容就來(lái)網(wǎng)站
www.rcebnm.cn看看吧！
Why does jet flow appear in injection molding process? The above is the relevant answer to the problem, so in order to avoid similar problems, it is necessary to make preparations before the injection molding process, such as the corresponding material inspection. For more information, please visit www.rcebnm.cn.
