一次性环保餐具材料成型的条件

一次性环保餐具注射成型过程中，有三个转变阶段：一是一次性餐具材料不进入桶体时的颗粒状态；二是塑性流动在桶内达到“副极”状态；三是一次性餐具材料通过一次性餐具模具浇注系统的流动和冷却。在每个阶段，都须有特定的工艺成型条件。下面小编为您讲解一番。

In the injection molding process of disposable tableware, there are three transition stages: one is the particle state when the disposable tableware material does not enter the barrel; Second, the plastic flow reaches the "sub pole" state in the barrel; The third is the flow and cooling of disposable tableware materials through the disposable tableware mold pouring system. At each stage, there must be specific process forming conditions. Here's a brief introduction.

一、颗粒状态：

1、 Particle state:

（1）预热和干燥：

(1) Preheating and drying:

原料预热干燥1.5-2min，物料温度升到80C°-100c°。原因是原材料中的水分含量往往过高。如果直接放入桶内，产品表面会变暗、颜色不均匀和表面起泡。但预热时间应适当，温度不宜过高。温度过高会导致产品表面出现焦斑；预热温度过高或预热时间过长会导致产品表面颜色不均匀。

The raw materials are preheated and dried for 1.5-2 min, and the material temperature rises to 80C ° - 100C °. The reason is that the moisture content in raw materials is often too high. If it is directly put into the barrel, the product surface will become dark, the color will be uneven and the surface will bubble. However, the preheating time should be appropriate and the temperature should not be too high. Too high temperature will cause focal spot on the product surface; Too high preheating temperature or too long preheating time will lead to uneven product surface color.

（2）加料计量：

(2) Feeding metering:

投料量应准确。如果原料太多，产品会有太多的飞边，难以清洗；如果原料太少，成型压力不足，产品无法完全固化。

The feeding amount shall be accurate. If there are too many raw materials, the product will have too many flash, which is difficult to clean; If the raw materials are too few and the molding pressure is insufficient, the product cannot be completely solidified.

二、熔副状态：

2、 Melting pair status:

（1）控制成型温度和压力：

(1) Control molding temperature and pressure:

根据一次性餐具材料较佳成型条件的要求，一次性餐具模具的成型温度应控制在150-220c°。

According to the requirements for better forming conditions of disposable tableware materials, the forming temperature of disposable tableware mold should be controlled at 150-220c °.

之间初始压力控制在70mpa-90mpa之间，加压时间为1-5s。如果原料温度过高，容易造成产品表面焦斑和产品颜色不均；如果初压时间过长，产品表面会松动；成型温度和压力不当会导致塑性流动性能差。

The initial pressure is controlled between 70 mpa and 90 mpa, and the pressurization time is 1-5s. If the raw material temperature is too high, it is easy to cause the product surface spot and uneven product color; If the initial pressing time is too long, the product surface will become loose; Improper molding temperature and pressure will lead to poor plastic flow performance.

（2）排气：

(2) Exhaust:

成型过程中会产生冷凝水和挥发性气体，因此成型过程中应进行排气，防范产品表面松动。通常，放气的次数和时间由经验决定，放气动作应尽可能快。只要及时消除压力并恢复到原始压力，放气操作就完成。我们的一次性餐具的结构并不复杂，因此不需要从一次性餐具模具的角度考虑排气结构。

Condensate water and volatile gas will be generated during the forming process, so exhaust gas shall be conducted during the forming process to prevent the product surface from loosening. Generally, the number and time of bleeding are determined by experience, and the bleeding action should be as fast as possible. As long as the pressure is eliminated in time and restored to the original pressure, the venting operation will be completed. The structure of our disposable tableware is not complex, so it is not necessary to consider the exhaust structure from the perspective of disposable tableware mold.

三、冲模流动及冷却定型：

3、 Die flow and cooling setting:

（1）固化阶段：

(1) Curing stage:

排气后，立即关闭模具，压力升到70-90mpa，持续约70s。在此阶段，固化时间应够长，否则产品表面会变暗。

After venting, close the mold immediately, and the pressure rises to 70-90mpa, lasting for about 70s. At this stage, the curing time should be long enough, otherwise the product surface will become dark.

（2）脱模：

(2) Demoulding:

固化后，产品风冷，喷射机构喷射产品。

After curing, the product is air cooled, and the spraying mechanism sprays the product.

（3）脱模后处理：

(3) Post stripping treatment:

我们制作食品器皿，所以产品成型后，应在120℃以上的一次性餐具模具中加热30-60分钟，以进一步固化。末后，抛光闪光灯，完成一次性餐具的生产。

We make food containers, so after the products are molded, they should be heated in disposable tableware molds above 120 ℃ for 30-60 minutes to further solidify. Finally, the flash lamp was polished to complete the production of disposable tableware.

一次性环保餐具材料成型的条件如上述所讲解，您对此有什么不了解的地方，欢迎来我们网站 //www.ucgmex.com进行咨询！

The forming conditions of disposable environment-friendly tableware materials are as explained above. If you don't know anything about this, please come to our website //www.ucgmex.com Consult!