相（xiàng）關模具注塑加工過程中（zhōng）有時會出現一些問（wèn）題，如果不及時處理就（jiù）會造成產品質量問題，從（cóng）而讓廠家以及消費者都會受到損（sǔn）失，比（bǐ）如說出現噴流紋問題，這是很（hěn）多人想了解的，下麵就來了解了解吧。
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（wén）是從澆口沿著流（liú）動方向，彎曲如蛇行一樣的痕跡，故也（yě）叫蛇形流。那它是怎麽出現的呢？其一，當熔融材料高速（sù）流過噴嘴、流道或（huò）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（fāng）向上（shàng）像蛇一樣彎曲（qǔ），並在（zài）與模具表麵接（jiē）觸後冷卻。如果（guǒ）這部分材料沒有與隨（suí）後進入型腔的樹脂很好地融合，則會（huì）在產品上形成噴（pēn）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（jiāo）口（kǒu）射出的速度太高。注射速度不當（dāng），塑料進入澆（jiāo）口後，在接觸型腔前沒（méi）有障礙物，飛得很遠，很快冷卻，形成射流圖案。此外，還有模具設計方麵出現了問題，比如：澆口位置和類型不合理，尺寸太小；流道尺寸（cùn）太小；澆（jiāo）口到型腔的截麵積（jī）突然增（zēng）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 locations 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.
那麽針對這（zhè）個問題，可以怎（zěn）麽去解決（jué）呢？
濟南注塑加工人員建議，模具（jù）設計時，在澆口前麵加（jiā）阻逆針，防（fáng）止料流噴射，擴大澆口橫截（jié）麵；在成型工藝方麵，調低（dī）注射速度，提高模具溫度，也能減緩與型腔表麵接觸的樹脂的冷（lěng）卻速率，這對防（fáng）止在充填初期形成（chéng）表麵硬化皮，也具有良好的效果，另外要調低材料的（de）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.
注塑加工過程中為何出現噴流紋的問題？以上就是問題的相關解答了，所以要想避（bì）免類似問題的出現（xiàn），就要在開始注（zhù）塑加工前做好準備工作，比如相應材料的檢查。更多內容就來網站
www.lsjtcyjt.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.lsjtcyjt.cn.
