一次性環(huán)保餐具注射成型過(guò)程中，有三個(gè)轉(zhuǎn)變階段：一是一次性餐具材料不進(jìn)入桶體時(shí)的顆粒狀態(tài)；二是塑性流動(dòng)在桶內(nèi)達(dá)到“副極”狀態(tài)；三是一次性餐具材料通過(guò)一次性餐具模具澆注系統(tǒng)的流動(dòng)和冷卻。在每個(gè)階段，都須有特定的工藝成型條件。下面小編為您講解一番。

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、顆粒狀態(tài)：

1、 Particle state:

（1）預(yù)熱和干燥：

(1) Preheating and drying:

原料預(yù)熱干燥1.5-2min，物料溫度升到80C°-100c°。原因是原材料中的水分含量往往過(guò)高。如果直接放入桶內(nèi)，產(chǎn)品表面會(huì)變暗、顏色不均勻和表面起泡。但預(yù)熱時(shí)間應(yīng)適當(dāng)，溫度不宜過(guò)高。溫度過(guò)高會(huì)導(dǎo)致產(chǎn)品表面出現(xiàn)焦斑；預(yù)熱溫度過(guò)高或預(yù)熱時(shí)間過(guò)長(zhǎng)會(huì)導(dǎo)致產(chǎn)品表面顏色不均勻。

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）加料計(jì)量：

(2) Feeding metering:

投料量應(yīng)準(zhǔn)確。如果原料太多，產(chǎn)品會(huì)有太多的飛邊，難以清洗；如果原料太少，成型壓力不足，產(chǎn)品無(wú)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、熔副狀態(tài)：

2、 Melting pair status:

（1）控制成型溫度和壓力：

(1) Control molding temperature and pressure:

根據(jù)一次性餐具材料較佳成型條件的要求，一次性餐具模具的成型溫度應(yīng)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 °.

之間初始?jí)毫刂圃?0mpa-90mpa之間，加壓時(shí)間為1-5s。如果原料溫度過(guò)高，容易造成產(chǎn)品表面焦斑和產(chǎn)品顏色不均；如果初壓時(shí)間過(guò)長(zhǎng)，產(chǎn)品表面會(huì)松動(dòng)；成型溫度和壓力不當(dāng)會(huì)導(dǎo)致塑性流動(dòng)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）排氣：

(2) Exhaust:

成型過(guò)程中會(huì)產(chǎn)生冷凝水和揮發(fā)性氣體，因此成型過(guò)程中應(yīng)進(jìn)行排氣，防范產(chǎn)品表面松動(dòng)。通常，放氣的次數(shù)和時(shí)間由經(jīng)驗(yàn)決定，放氣動(dòng)作應(yīng)盡可能快。只要及時(shí)壓力并恢復(fù)到原始?jí)毫?，放氣操作就完成。我們的一次性餐具的結(jié)構(gòu)并不復(fù)雜，因此不需要從一次性餐具模具的角度考慮排氣結(jié)構(gòu)。

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、沖模流動(dòng)及冷卻定型：

3、 Die flow and cooling setting:

（1）固化階段：

(1) Curing stage:

排氣后，立即關(guān)閉模具，壓力升到70-90mpa，持續(xù)約70s。在此階段，固化時(shí)間應(yīng)夠長(zhǎng)，否則產(chǎn)品表面會(huì)變暗。

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）脫模：

(2) Demoulding:

固化后，產(chǎn)品風(fēng)冷，噴射機(jī)構(gòu)噴射產(chǎn)品。

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

（3）脫模后處理：

(3) Post stripping treatment:

我們制作食品器皿，所以產(chǎn)品成型后，應(yīng)在120℃以上的一次性餐具模具中加熱30-60分鐘，以進(jìn)一步固化。末后，拋光閃光燈，完成一次性餐具的生產(chǎn)。

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.

一次性環(huán)保餐具材料成型的條件如上述所講解，您對(duì)此有什么不了解的地方，歡迎來(lái)我們網(wǎng)站http://m.qylxschool.cn進(jìn)行咨詢！

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 http://m.qylxschool.cn Consult!