沃尔沃

扫一扫关注微信二维码 速度与激情9百炼成钢
    Chinese     |     English
News
News
Contact Person: Mr. Jackey Tang
International Department
Tel: +86 21 57874766 / 57874866
Fax: +86 21 57871880
Cell phone: +86 13524781006
Email: jackey@shzxsj.com.cn
MSN: zx_plastic@hotmail.com
News
Location >> News >> News
Introduction to Injection Molding
2011-04-16

Injection molding is considered one of the most common plastic part manufacturing processes. It can be used for producing parts from both thermoplastic and thermoset polymers. The process usually begins with taking the polymers in the form of pellets or granules and heating them to the molten state. The melt is then injected/forced into a chamber formed by a split-die mold. The melt remains in the mold and is either chilled down to solidify (thermoplastics) or heated up to cure (thermosets). The mold is then opened and the part is ejected.


A Typical Injection Molding Process

In spite of the relatively expensive tooling cost, injection molding remains the most popular manufacturing process for plastic materials in mass production, thanks to its low operational cost, high throughput, and the flexibility to make parts with complex shapes.

Polymers commonly used for injection molding include:

Polystyrene (PS)

Polystyrene, also known as PS, has been mass-produced since 1930.

It is a thermoplastic polymer. Applications: Used for inexpensive packaging materials, pens, safety razors, flatware, and CD jewel boxes. In Styrofoam format, PS is used to make high-throughput, thin-walled, easy-to-mold parts where structure is not paramount.

General properties: A material not structurally strong but easy to mold, it is inexpensive, machines well, and possesses excellent transparency.

Trade Name: Novacor 555

Acrylonitrile-Butadiene-Styrene, also known as ABS, has been mass-produced since 1960's.

It is a thermoplastic.

Applications: Used in electronic housings, auto parts, consumer products, pipe fittings, waste pipes, computer housings (electroplated on the inside), and automotive interior and exterior trim.

General properties: It is tough, hard and rigid. Good chemical resistance and dimensional stability; creep resistance, electroplatable, moderate strength, inexpensive. Tendency to stress crack.

Trade Name: Cycolac, Lustran.

  • Polyamide (PA)

Polyamide, also known as PA, or Nylon, has been mass-produced since 1935.

It is a thermoplastic polycondensate.

Applications: Used to make high-lubricity parts (e.g. bearings, blow moldings, and clothing fabric).

General properties: It has high lubricity and moderate strength. It is tough, inexpensive, and has poor dimensional stability due to water absorption (hygroscopic nature).

Trade Name: Ultramid, Zytel.

  • Polypropylene (PP)

Polypropylene, also known as PP, has been mass-produced since 1950's.

It is a thermoplastic, (crystalline), polymer.

Applications: Used to make medical syringes, beakers, and parts for auto interiors.

General properties: It possesses high lubricity, high resistance to flexing (excellent for living hinges), excellent dielectric strength and chemical resistance, good impact strength, and high solvent resistance. It is inexpensive and electroplatable. It is difficult to paint, print on, or bond to. It will be attacked by fuming nitric acid and degraded by UV and ionizing radiation.

Trade Name: Marlex HGL, Fortilene 1800 series (FDA materials).

  • Polyethylene (PE)

Polyethylene, also known as PE, has been mass-produced since 1939.

It is a thermoplastic polymer.

Applications: The largest volume commodity plastic, PE is used in blow-molded beverage bottles, auto gas tanks, and extruded pipe.

General properties: It has good toughness at low temperatures and is inexpensive.

Trade Name: Marlex, Alathon, Hostalen.

  • Polyvinylchloride (PVC)

Polyvinylchloride, also known as PVC, has been mass-produced since 1938.

It is a thermoplastic polymer.

Applications: Used in pipes and fittings, wire and cable insulation, extruded film and sheet, and medical applications.

General properties: Its flexible grades are easy to process. Its rigid grades have a high dielectric strength, outdoor stability, chemical resistance, good moisture stability, and low cost. Both have low heat resistance.

Trade Name: Geon, Viclon.

  • Other short fiber reinforced plastics
Shanghai XinYun Plastic Products Co., Ltd.      Service complaints: 18917988688
xml地图 | sitemap地图
五菱宏光
分享到:QQ空间新浪微博腾讯微博人人网微信
五等分の気持ち 萌探探探案 腾讯游戏零点巡航 下一位前度 修罗武神烟火里的尘埃 格力研发空调发电 周杰伦 全职法师 易烊千玺 丰田 烟火里的尘埃 台风尼伯特生成 千与千寻 大妈水枪喷火炬手 逆天邪神 五十公里桃花坞 寻情记 穿越火线 王牌对王牌 喜羊羊与灰太狼 荒野行动 不说再见 乘风破浪的姐姐 名侦探柯南 赛尔号 完美世界 不说再见 房东回应免租4年中国女排对阵美国 天官赐福 逆天邪神 热爱就一起 猫和老鼠 王一博 百万网民野性消费 我很愉快 吴亦凡 虎扑 樱花 建军大业 陈情令 白蛇2:青蛇劫起 奥运开幕式生变故最佳女婿 贰 名侦探柯南 圣墟 奥运金牌榜更新 蔡徐坤 中国远征军 孙俪史上最狂山寨栽了 创造营2021 金牛座 武炼巅峰 德甲直播 mg 女生创建救命文档 穿越火线 下一位前度 | 下一页
Baidu
sogou
百度 搜狗 360