文档介绍：ABSTRACT
Here to enter the need to turn over a source of plastic materials, low price, quality and performance characteristics. it is in computers and mobile phones, cars and electrical and electronics, instruments, appliance and products manufacturing is an alternative to the role of the most widely used. an injection is a thermoplastic - concrete shape of the main method, the scope of application is very large.
Been shaping the plastic materials in rolls of the material being heated, which has become a highly fluid bolts, or as the pressure of tools, the melted by regulated by a high pressure injection mould of form, after a cooling and solidify, and then die from the adjustment, as of plastic.
The product is of daily use of plastic bottle, and with high practicability. the product design for mass production, the design molds to have high molding efficiency, the system can automatically release, in addition to ensure the quality of the surface forms a side gate and therefore use single cent for the injection, the side gate automatically release the structure of the type. the machine mold is a choice of a module four chambers structure, the system uses the side gate to push out of shape, form a board with the agency to complete the forms of the launch of the process.
Key words:injection;side gate;a core.
1 绪论
中国塑料模具工业发展现状
从市场情况来看，塑料模具生产企业应重点发展那些技术含量高的大型、精密、复杂、长寿命模具，并大力开发国际市场，发展出口模具。随着中国塑料工业，特别是工程塑料的高速发展，可以预见，中国塑料模具的发展速度仍将继续高于模具工业的整体发展速度，未来几年年增长率仍将保持20%左右的水平。整体来看，中国塑料模具无论是在数量上，还是在质量、技术和能力等方面都有很大进步，但与国民经济发展的需求、世界先进水平相比，差距仍很大。一些大型、精密、复杂、长寿命的中高档塑料模具每年仍需大量进口。在总量供不应求的同时，一些低档塑料模具却供过于求，市场竞争激烈，还有一些技术含量不太高的中档塑料模...整体来看，中塑料模具无论在数量上，还是在质量、技术和能力等方面都有了很大进步，但与国民经济发展的需求、世界先进水平相比，差距仍很大。一些大型、精密、复杂、寿命的中高档塑料模具每年仍需大量进口。在总量供不应求的同时，一些低档塑料模具却供过于求，市场竞争激烈，还有一些技术含量不太高的中档塑料模具也有供过于求的趋势。
加入WTO，给塑料模具产业带来了巨大的挑战，同时带来更多的机会。由于中国塑料模具以中低档产品为主，产品价格优势明显，有些甚至只有国外产品价格的1/5～1/3，加入WTO后，国外同类产品对国内冲击不大，而中国中低档模具的出口量则加大；在高精模具方面，加入WTO前本来就主要依靠进口，加入WTO后，不仅为高精尖产品的进口带来了更多的便利，同时还促使更多外资来中国建厂，带来国外先进的模