一次性环保餐具材料成型有三个过渡阶段

在一次性餐具的注塑成型过程中，有三个过渡阶段：一是一次性餐具材料没有进入料筒时的颗粒状态；二是塑料在料筒内流动达到“二次极”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，都必须有特定的工艺成型条件。

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

颗粒状态：

Particle status:

预热干燥：

Preheating and drying:

原料预热干燥1.5-2min，料温升至80C°-100c°。原因是原料中的水分含量往往过高。如果直接放入桶中，产品表面会变暗，颜色不均匀，表面起泡。但预热时间要适当，温度不宜过高。温度过高，产品表面会出现焦斑；如果预热温度过高或预热时间过长，产品表面颜色会不均匀。

The raw materials shall be preheated and dried for 1.5-2min, and the material temperature shall rise to 80C ° -100c °. The reason is that the moisture content in raw materials is often too high. If the product is directly put into the barrel, the surface of the product will become dark, the color will be uneven, and the surface will blister. However, the preheating time should be appropriate and the temperature should not be too high. If the temperature is too high, the product surface will appear coke spots; If the preheating temperature is too high or the preheating time is too long, the product surface color will be uneven.

进料测量：

Incoming measurement:

进料量要准确。原料过多，产品毛边过多，难以清洗；原料太少，成型压力不足，产品不能完全固化。

The feeding amount shall be accurate. There are too many raw materials and too many rough edges, which are difficult to clean; Too few raw materials, insufficient forming pressure, and the product can not be fully cured.

融合状态：

Fusion status:

控制成型温度和压力：

Control forming temperature and pressure:

根据一次性餐具材料佳成型条件的要求，一次性餐具模具的成型温度应控制在150-220℃。初始压力控制在70mpa-90mpa之间，加压时间1-5s。如果原料温度过高，容易造成产品表面有焦斑，产品颜色不均匀；初压时间过长，产品表面会松散；不合适的成型温度和压力会导致塑料流动性能变差。

According to the requirements of good molding conditions for disposable tableware materials, the molding temperature of disposable tableware mold should be controlled at 150-220 ℃. The initial pressure is controlled between 70mpa-90mpa and the pressurization time is 1-5s. If the raw material temperature is too high, it is easy to cause scorch spots on the product surface and uneven product color; If the initial pressing time is too long, the product surface will be loose; Improper molding temperature and pressure will lead to poor plastic flow performance.

排气状态：

Exhaust status:

一次性环保餐具成型过程中会产生冷凝水和挥发性气体，所以成型过程中应进行排气，防止制品表面松动。通常，放气的次数和时间由经验决定，放气动作应尽可能快。只要及时卸压，恢复原来的压力，放气操作就完成了。餐具的结构并不复杂，所以不需要从一次性餐具模具的角度考虑排气结构。

Condensing water and volatile gas will be produced during the molding process of disposable environment-friendly tableware, so exhaust should be carried out during the molding 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 relieved in time and the original pressure is restored, the bleeding operation is completed. The structure of tableware is not complicated, so it is not necessary to consider the exhaust structure from the perspective of disposable tableware mold.

模流和冷却设置：

Mold flow and cooling settings:

固化阶段：

Curing stage:

排气后立即合模，压力升至70-90mpa约70s。在这个阶段，固化时间要足够长，否则产品表面会变黑。

Close the mold immediately after the exhaust, and the pressure rises to 70-90mpa for about 70s. At this stage, the curing time should be long enough, otherwise the product surface will turn black.

脱模：

Demoulding:

固化后对产品进行风冷，喷涂机构对产品进行喷涂。

After curing, the product shall be air cooled, and the spraying mechanism shall spray the product.

脱模后的处理：

Treatment after demoulding:

我们做的是餐具，所以产品成型后要在一次性餐具模具中加热120℃以上30-60分钟，进一步凝固。后进行闪光打磨，完成一次性环保餐具的制作。

What we do is tableware, so after the product is formed, it should be heated in the disposable tableware mold above 120 ℃ for 30-60 minutes to further solidify. After that, flash polishing is carried out to complete the production of disposable environment-friendly tableware.

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