当用高粘度材料成型厚壁产品时，注塑模具产品表面的橘皮或表面起皱缺陷一般发生在流道末端。例如注塑模具产品在注塑过程中，如果熔体流动速率过低，注塑模具就会失效。加工品表面会迅速凝固，随着流动阻力的增大，熔体前端流动变得不均匀，导致先凝固的外层材料不能充分接触型腔壁，导致皱纹。这些褶皱在固化和包装后成为无法修复的缺陷。

When thick wall products are molded with high viscosity materials, orange peel or surface wrinkling defects usually occur at the end of the runner. For example, in the injection process of injection mold products, if the melt flow rate is too low, the injection mold will fail. The surface of the processed product will solidify rapidly. With the increase of flow resistance, the flow at the front end of the melt becomes uneven, resulting in that the solidified outer material can not fully contact the cavity wall, resulting in wrinkles. These folds become irreparable defects after curing and packaging.

注塑模具加工产品表面的橘皮缺陷影响表面外观。所以在此建议您采用提高熔体温度、提高注射速度、适当提高注塑模具加工温度等方法来解决这一缺陷。

Orange peel defects on the surface of injection mold products affect the surface appearance. Therefore, it is recommended that you solve this problem by increasing the melt temperature, increasing the injection speed and appropriately increasing the processing temperature of the injection mold.

此外模具设计缺陷也会在浇口附近产生暗斑。浇口处尖锐的转角能够通过改变半径来避免，在设计时要留心浇口的位置和直径，看看浇口的设计是否合适。

In addition, mold design defects will also produce dark spots near the gate. Sharp corners at the gate can be avoided by changing the radius. Pay attention to the position and diameter of the gate in the design to see if the gate design is appropriate.

暗斑不但会发生在浇口位置，而且也经常会在制品尖锐的转角形成后出现。例如，制品的尖锐转角表面一般非常光滑，但是在其后面就非常灰暗且粗糙。这也是由于过高的流速和注射速度致使冷却表面层被内部流体取代发生滑动而造成的。

Dark spots not only occur at the gate, but also often occur after sharp corners of the product are formed. For example, the sharp corner surface of the product is generally very smooth, but behind it is very gray and rough. This is also caused by the sliding of the cooling surface layer replaced by the internal fluid due to the high flow rate and injection speed.

再次推荐采用分步注射并逐渐增加注射速度。佳的方法是允许熔体只是在流过锐角边缘后其速度才开始增加。

It is again recommended to use step-by-step injection and gradually increase the injection speed. A good method is to allow the melt to increase its velocity only after flowing through the sharp edge.

对于注塑加工制品来说，在有纹理的制品表面，其光泽的不同是为明显的。即使模具的表面十分均匀，不规则的光泽也可能出现在制品上。也就是说，制品某些部位的模具表面效果没有很好地得以重现。

For injection molded products, the difference in gloss is obvious on the surface of textured products. Even if the surface of the mold is very uniform, irregular gloss may appear on the product. In other words, the mold surface effect of some parts of the product is not well reproduced.

另外，济南注塑模具厂家提醒，熔体不充分的排气也是造成此缺陷的一个原因。“橘皮”或者表面起皱缺陷一般发生在用高粘度材料成型厚壁制品时的流道末端。在注射过程中，若熔体流动速度过低，制品表面会迅速固化。

In addition, Jinan injection mold manufacturers remind that insufficient exhaust of melt is also a reason for this defect. "Orange peel" or surface wrinkling defects usually occur at the end of the runner when forming thick wall products with high viscosity materials. During the injection process, if the melt flow rate is too low, the product surface will solidify rapidly.

随着流动阻力的加大，熔体前端流将会变得不均匀，致使先固化的外层材料不能与型腔壁充分接触，从而产生了皱褶。这些皱褶经过固化和保压后就会变成不可消除的缺陷。对于该缺陷，解决的方法是提高熔体温度并且提高注射速度。

With the increase of flow resistance, the melt front-end flow will become uneven, so that the solidified outer material can not fully contact with the cavity wall, resulting in wrinkles. These wrinkles will become irreparable defects after curing and pressure maintaining. For this defect, the solution is to increase the melt temperature and the injection speed.

模具注塑加工制品表面橘皮及暗斑存在原因以及怎么处理的相关内容都给介绍了，您可以作为参考使用，当然了解更多信息可以关注我们网站www.sdlqmj.com！

The causes of orange peel and dark spots on the surface of injection molded products and how to deal with them are introduced. You can use them as a reference. Of course, for more information, you can pay attention to our website www.sdlqmj com！