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

        Types of plastic mold molding

        Release time:2022-01-17

        injection molding

        It is a method that the plastic material is heated and melted in the heating barrel of the injection molding machine, and then the melt is pushed into the mold cavity of the closed mold through the reciprocating screw for molding.

        It can not only produce high-precision and high-quality products with high productivity, but also has a wide range of processable plastics with large output (accounting for about 1/3 of the total plastic). Therefore, injection molding is one of the important molding methods in plastic processing.


        Extrusion molding

        Extrusion is a method of continuous molding of plastic through a die in a flowing state by heating and pressurizing in an extruder.

        It is generally used for the molding of coatings such as plates, pipes, monofilaments, flat filaments, films, wires and cables. It has a wide range of applications and high output. Therefore, it is one of the important molding methods in plastic processing.


        Foaming molding

        It refers to the processing method of adding appropriate foaming agent into foaming materials to make porous or foam products. Foaming products have the advantages of low relative density, high specific strength, less consumption of raw materials, sound insulation, heat insulation and so on. Foaming materials include PVC, PE and PS.

        Products: film, plate, pipe, profile, etc. Foaming can be divided into chemical foaming and physical foaming.


        Blow molding

        Blow molding (film expansion) molding (or hollow blow molding) refers to a molding method in which the thermoplastic parison or sheet in the closed mold is blown into a hollow product by fluid (compressed air) pressure.

        Plastic containers produced by this method. For example, various bottle types, square types, barrels or flat barrels, gasoline tanks, etc. have been widely used. Newly developed industrial parts and daily-use products, such as double wall box products, L-ring barrels, palletizing boards, surfboards, seat backs and desks, as well as front chocks for automobiles, belt covers, instrument panels, air conditioning ventilation pipes, etc., have been applied in practice, and processing materials have developed from daily-use plastics to engineering plastics. Now blow molding has become one of the important molding methods in plastic processing.

        But the basic steps of blow molding process are:

        1. Molten material.

        2. The molten resin is formed into tubes or parisons.

        3. Melt and seal the hollow parison in the blow mold.

        4. Blow the parison in the mold.

        5. Cool blow molded products.

        6. Remove the product from the mold.

        7. Trim.


        Injection Blow Molding

        Injection blow molding is a blow molding method. The plastic is first made into a bottomed parison by injection molding, and then transferred to a blow molding mold to blow molded into a hollow product.

        This method can be used to produce packaging containers for daily necessities, cosmetics, drugs, food, etc., but its volume should not exceed 1L. Commonly used plastics include polyethylene, polystyrene and polyvinyl chloride.


        extrusion blow molding

        Extrusion blow molding is a blow molding method. Unlike injection blow molding, its parison is made by extrusion.

        stretch blow molding

        Stretch blow molding is a blow molding method. The parison is made by extrusion and injection molding, and then heated to the drawing temperature. Longitudinal stretching is carried out by internal (such as mandrel) or external (such as fixture) mechanical force, and transverse stretching is carried out by compressed air inflation at the same time or later.

        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
        欧美性色婷婷久久久精品| 国产精品三级av一区二区| 少妇无内裤下蹲露大唇视频| 亚洲av乱码专区国产乱码| 亚洲中文字幕国产av| 美女蜜臀av一区二区| 美女被爆操到高潮久久久| 特黄精品毛片在线观看| 不打码在线观看一区二区三区视频| 亚洲欧美日韩精品另类| 加勒比熟女精品一区二区av| 日韩AV高清在线观看| 亚洲自偷精品视频自拍| 日本二区视频在线观看| 成人黄色av播放免费| 在线观看免费人成视频国产| 97人妻天天爽夜夜爽二区| 亚洲国产91在线一区二区三区 | 看全色黄大黄大色免费久久| 日本精品三级在线观看| 国产成人自拍小视频在线| 无码人妻精品一区二区三区9厂| 一区二区三区人妻熟妇| av成人在线观看网址| 久久黄色蜜桃av一区| 中文字幕手机在线看片不卡| 精品一区二区三区人妻久久| 丰满人妻中伦妇伦av| 蜜桃av多人一区二区三区| 精品国产一区二区三区久久久狼 | 亚洲乱码精品97久久久| 91精品久久人妻一区二区夜夜夜 | 欧美一区二区三区福利| 精品人妻一区二区三区蜜桃 | 欧美精品大片一区二区| 日本精品乱码一区二区三区 | 国产尤物在线一区av| 国产精品久久久久久亚洲AV| 日本免费熟女一区二区| 日韩精品中文一二三区| 老司机永久免费视频网站|