很多人會疑惑，為什麽注塑模具的高（gāo）溫會產生高光澤的塑（sù）件呢？現在我們從兩（liǎng）個方麵來解釋（shì）這個問題。
Many people will wonder why the high temperature of injection mold will produce high gloss plastic parts? Now let's explain this problem from two aspects.
模具溫度對外觀的影響：
Effect of mold temperature on appearance:
模具溫度過低，熔體流動性降低，可能（néng）出現欠注現象；模具溫度會影響塑料的結晶（jīng）度。對於ABS，如果模具溫度過低，產品光潔度（dù）就會低。與塑料和填（tián）料相比，塑料在高（gāo）溫下更容易遷移到表麵。
If the mold temperature is too low, the melt fluidity will be reduced, and underinjection may occur; Mold temperature will affect the crystallinity of plastic. For ABS, if the mold temperature is too low, the product finish will be low. Compared with plastics and fillers, plastics are easier to migrate to the surface at high temperatures.
因此，當注塑模具溫（wēn）度較高時，塑料成分更接近注塑模具表麵，填充性會更好，亮（liàng）度和光澤度也會更高。但注塑模具（jù）的（de）溫度不宜過高。如（rú）果過高，容易粘模，塑件部分會出現明（míng）顯的（de）亮點。如（rú）果注塑模具溫（wēn）度過（guò）低，也會造（zào）成塑件抱得太緊，脫模時容易拉傷塑件，尤其是塑件表麵的花紋。
Therefore, when the temperature of the injection mold is high, the plastic composition is closer to the surface of the injection mold, the filling property will be better, and the brightness and gloss will be higher. But the temperature of the injection mold should not be too high. If it is too high, it is easy to stick to the mold, and there will be obvious bright spots in the plastic part. If the temperature of the injection mold is too low, it will also cause the plastic parts to be held too tightly, and it is easy to pull the plastic parts during demoulding, especially the patterns on the surface of the plastic parts.
多（duō）段（duàn）注塑可以位（wèi）置問題。例如，如果產品進膠時（shí）有氣紋（wén），可以采用分段（duàn）注塑的方法。在注塑行業，對於有光澤的產品，模（mó）具溫度越高，產品表麵的（de）光澤度越高。相反，如果溫度低，表麵的光澤度也較低。但是，對於陽光紋（wén）理PP材料製成的產品，溫度越（yuè）高（gāo），產品表麵的光澤度越低。光澤（zé）度越低，色差越大，光澤度與色差成反（fǎn）比。
Multi stage injection molding can solve the position problem. For example, if the product has gas lines when it is injected, the method of sectional injection molding can be adopted. In the injection molding industry, for shiny products, the higher the mold temperature, the higher the gloss of the product surface. On the contrary, if the temperature is low, the surface gloss is also low. However, for products made of sun textured PP materials, the higher the temperature, the lower the gloss of the product surface. The lower the gloss, the greater the color difference, and the gloss is inversely proportional to the color difference.
對產品尺寸的影（yǐng）響：
Impact on product size:
如果模具溫度過高，熔體會熱分解。產品出來後，空氣中（zhōng）的收縮率會增加，產品尺寸會變小。模具在低溫下使用時，如果零件尺寸變（biàn）大，一般是由於模具表麵造成的。溫度過低引起的。這是因為模具表麵溫度太低，製品在空氣中收（shōu）縮少，所以尺（chǐ）寸要大一些！
If the mold temperature is too high, the melt will be thermally decomposed. After the product comes out, the shrinkage in the air will increase and the product size will become smaller. When the mold is used at low temperature, if the part size becomes larger, it is generally caused by the mold surface. Caused by low temperature. This is because the mold surface temperature is too low, the product shrinks less in the air, so the size should be larger!
原因是：低模溫加速了分子的“凍結取向”，增加了（le）模腔內熔體凍結層的厚度，同時低模溫阻礙（ài）了晶體的生長，從而降低產品（pǐn）的成型收縮率。反之，模具溫度高（gāo）時，熔體冷卻慢（màn），鬆（sōng）弛時間長（zhǎng），取向度低，同時有利於結晶，製品的實（shí）際收縮率為（wéi）大的。
The reason is that low mold temperature accelerates the "freezing orientation" of molecules, increases the thickness of the melt freezing layer in the mold cavity, and at the same time, low mold temperature hinders the growth of crystals, thus reducing the forming shrinkage of products. On the contrary, when the mold temperature is high, the melt cooling is slow, the relaxation time is long, the degree of orientation is low, and it is conducive to crystallization. The actual shrinkage of the product is large.
如果在（zài）尺寸穩定之前啟動過程太長，這表明模具溫度沒有很好地控製，因為模具需（xū）要很長時間才能（néng）達到熱平（píng）衡。
If the start-up process is too long before the size is stable, it indicates that the mold temperature is not well controlled, because the mold takes a long time to reach thermal equilibrium.
濟南注塑加工廠家認為模具（jù）某（mǒu）些部位散熱不均（jun1）勻會大大延長生產（chǎn）周期，從而增加成型成本！恒定的（de）模具溫度減少了成型收縮的波動並提高了尺寸（cùn）穩定性。對於結（jié）晶性塑料，模（mó）具溫度高有利於結晶過程（chéng），完全結晶的（de）塑件在儲存或使用過程中不（bú）會發生尺寸變化。
Jinan injection molding manufacturers believe that uneven heat dissipation in some parts of the mold will greatly prolong the production cycle, thus increasing the molding cost! Constant die temperature reduces the fluctuation of forming shrinkage and improves dimensional stability. For crystalline plastics, high mold temperature is conducive to the crystallization process, and fully crystallized plastic parts will not change in size during storage or use.
但（dàn）是，高結晶度會導致（zhì）大的（de）收縮。對於較軟的（de）塑料，成型時應采用較低（dī）的模具溫度，有利於尺寸穩定性。對於任何材料，模具溫度恒定，收縮（suō）率（lǜ）一致（zhì），有利於提高尺寸精度！
However, high crystallinity will lead to large shrinkage. For softer plastics, lower mold temperature shall be adopted during molding, which is conducive to dimensional stability. For any material, the mold temperature is constant and the shrinkage rate is consistent, which is conducive to improving the dimensional accuracy!
The above is the relevant content of the answer to the question. I hope it can help you. If you have any questions about this issue, you are welcome to follow our website http://www.lsjtcyjt.cn And consult our staff, who will serve you wholeheartedly.
