相關模具注塑加工過程中有時會出現一些問題，如果不及時處理就會造成產品質量問題，從而讓廠家以及消費者都會受到損失，比如說出現噴流紋問題，這是很多人想了解的，下面就來了解了解吧。
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.
注塑加工過程中出現的噴流紋是從澆口沿著流動方向，彎曲如蛇行一樣的痕跡，故也叫蛇形流。那它是怎么出現的呢？其一，當熔融材料高速流過噴嘴、流道或澆口等狹窄區域時，會突然進入開放的、相對較寬的區域。熔體在流動方向上像蛇一樣彎曲，并在與模具表面接觸后冷卻。如果這部分材料沒有與隨后進入型腔的樹脂很好地融合，則會在產品上形成噴射圖案。
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，塑料進入澆口后，在接觸型腔前沒有障礙物，飛得很遠，很快冷卻，形成射流圖案。此外，還有模具設計方面出現了問題，比如：澆口位置和類型不合理，尺寸太小；流道尺寸太小；澆口到型腔的截面積突然增大，流動性不穩定，容易產生射流。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.
那么針對這個問題，可以怎么去呢？
濟南注塑加工人員建議，模具設計時，在澆口前面加阻逆針，防止料流噴射，擴大澆口橫截面；在成型工藝方面，調低注射速度，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，另外要調低材料的流動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.
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.zsxinyuanbuye.com.cn.
