欧美日韩国产一二三四五区,国产区在线观看成人精品,91亚洲精品国产嫩草,国产丰满的富婆自拍对白,久久精品偷拍视频观看,国产av一区二区中文字幕,久久国产超碰女女av,久久不卡国产一区二区,欧美中文字幕一二三四区,亚洲欧美熟妇欲乱又伦

<delect id="d07zl"></delect>

    1. <rt id="d07zl"></rt>
        <rt id="d07zl"></rt>
        Welcome to Shenzhen Zhongyuan Plastic Co., Ltd!

        News



        Tel:(0755)27151698
        Fax:(0755)27150611
        Mailbox:szzyzcl@163.com / szzy@szzy99.com
        Add:Building A1 and A2, No.1 Industrial Zone, yuliu property company, Gongming town, Bao'an District, Shenzhen
        Industry information

        當(dāng)前位置:

        首頁 News Industry information

        Manufacturing process of plastic shell

        Release time:2022-03-14

        With the development of the times, plastic shell has been more and more deeply into our life. Many friends can't avoid using plastic shell to deal with various things, such as the protection of computer power supply, the protection of safety tools, and the shell of power bank we use is plastic shell, so the plastic shell plays a great role in our life. It is such a frequent product that we may not know its production process.

        6.jpg


        Plastic shell production process 1: at the initial stage of the plastic shell production process, what we need to do is to prepare materials. In the process of material preparation, what we need to do is to check the quality of plastic shell materials and determine the types of materials used. Because there are usually more choices of plastic shell materials, we must make accurate choices.


        Plastic shell production process 2: after selecting materials, the plastic shell production process will come to the mixing and drying process. In this process, many friends do not know the specific function. In fact, the essence of mixing and drying is to remove the moisture in the material and reduce the occurrence of defects in the plastic shell injection molding process. If the moisture in the material cannot be reduced by 0.02%, irregular crazes will appear on the surface of the finished plastic shell, which will have a great impact on the appearance of the plastic shell.


        Plastic shell production process 3: the important production process of plastic shell must be injection molding process, which determines whether the plastic shell meets the standard process. If you want to process a good quality plastic shell, you must control the temperature, mold, injection method, injection speed and other factors, so this process also needs to be carefully completed.


        Plastic shell production process 4: the plastic shell comes to an end with the completion of injection molding. What we still need to do is to complete the quality inspection of the plastic shell, and then pack it out of the factory.

        Copyright: Shenzhen Zhongyuan Plastic Co., Ltd. | mold processing customized manufacturer. If you want to know the processing price of the factory, how much is it, and which is good, please contact us Yue ICP Bei No. 17060480
        亚洲av精选在线观看| 成人欧美一区二区三区黑人| 好大好紧好湿好黄视频| 自拍偷在线精品自拍偷| 免费无码AV一区二区三区| 国产熟女激情一区二区三区| 国产精品自拍亚洲视频| 人成视频在线观看免费播放| 日本亚洲情一区二区三区| 91久久精品一区二区| 在线免费成人亚洲av| 国产午夜精品理论大片| 精品国产成人午夜福利| 亚洲欧洲一区二区免费| 美日韩一区二区三区色| 欧美精品黑人粗大免费| 久久综合五月丁香久久激情| 午夜理理伦A级毛片天天看| 四虎AV永久在线精品免费观看| 尤物性感网站在线观看视频免费| 熟妇人妻久久系列中文字幕| 人妻少妇性色专区av| 国产精品伦理一区二区三区| 亚洲成AV人片在| 免费少妇A级毛片人成网| 欧美一区二区三区久久久人妖| 五月婷婷激情六月开心| 日本区一区二区三啪啪| 色系免费一区二区三区| 成人av在线一区二区| 波多野42部无码喷潮在线| 亚洲欧洲精品在线播放| 仙踪林色情一区二区三区| 亚洲免费不卡av网站| 亚洲国产精品成人久久av| 制服丝袜人妻一区二区| 蜜桃在线一区二区三区| 欧美性大战插插插久久久| 成人精品在线视频一区二区| 国产黄色一区二区在线| 尤物视频国产在线观看|