Injection molding is one the most frequent method of manufacturing parts and shaping plastic as per the requirement. Plastic injection molding machine is used for several purposes such as packaging, bottle caps, and many other products. It is one of the best techniques for producing large quantities of a particular item in bulk. The equipment consists of a heating unit, material hopper, the screw type plunger and the injection ram. The mold can be classified into two main categories, the injector mold and the ejector mold. For complex parts, complex molds are required. The tools used are mainly made of steel. There are two main methods, which are usually employed to build the molds. Standard machining is the traditional way of building. More accurate details in less time are possible with technological development. In this process electrical discharge machining is widely used in mold making. The heat treatment is required to create various formations and shapes to allow the machine to handle these formations easily. A number of advantages of using this technique are that as it can be used for bulk production; therefore it involves lower cost of labor. There is minimum wastage in terms of the plastic scraps and very little effort is needed to finish the part, after molding has been done. The mold is cooled continuously to a temperature, which allows the resin to harden and keep it cool. Water is used as the main cooling agent. The water can be directed in a way, which helps in quick cooling. Crystalline materials require a warmer mold and a cycle time, which is lengthier. The power requirements depend on the gravity of a material. The clamping force or the pressure is increased by the total cavity area. The thicker parts require longer cooling time. The cost of manufacturing depends on several factors. The factors are number of cavities, complexity of the pieces and the size of the parts. The plastic injection molding machine technique helps in reducing the cost of manufacturing; resulting in the reduction of the overall price of the product. TECHSOURCE sells plastic injection molding machine and exports equipment worldwide, including Canada, Mexico, Central and South America, the Caribbean, Asia, and Eastern Europe. (http://www.techsourcemachinery.com)
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