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Question by jun_matsumoto_gokus3n: CAN ANYOne pls. answer my question..it’s important read below..?
Well it’s about thermosetting plastics (also known as thermosets) I would like to ask if anyone has a knowledge about them and can you please send me or link to me a website that shows a drawing diagram of step by step of each process of production of thermosetting plastics (injection molding, extrusion molding,calendering,compression molding blow molding etc..) i need at least a drawing diagram for the process and and also if you have any examaples of thermosetting plastics (like bakelite,melamin resin) please tell me if you know any ..and also why A thermoset material cannot be melted and re-shaped after it is cured… thanks in advance
i’ve already visited wikipedia and if you have other sites that you know youre welcome to say it..

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Answer by heimdahl_jr
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Important Tips For Your Plastic Machining Project

To find any machine shop is very easy. The difficult part is finding the shop that specializes in plastic machining, particularly plastic precision machining and other non-metallic parts and plastic machine parts.

Aerospace, fluid handling, medical and semiconductor are just few of the many industries that have constant demand for tasks that involve plastic materials and processes. Shops may be flooding the streets of America, however, finding the right shop that provides excellence service to customers on top of offering the highest quality of plastic precision machining service and plastic-precisioned products and parts. Building trust is essential. Sometimes it is easy, however at most, people place trust to wrong shops. To help you on this, there are several tips that serve as your guide, in case need for plastic machining arises.

Before purchasing plastic materials and machines such as plastic rod, plastic molds, plastic welding, plastic sheet, plastic injection molders, plastic fabrication and other plastic precision machining parts, you need to understand the capacity, condition and capability of the plastic machine or plastic machine parts. A conversation with the store manager or sales agent can be helpful.

Second, make sure that the plastic machine shop can give you important documents such as maintenance records, manuals and the complete manufacturer’s specifications and equipment retrofit quotes. These papers are great source of information that is useful in your decision making with regards plastic machining. Third, use the expertise of third party to verify the condition of the plastic machine parts. Their opinion or appraisal on the condition, quality and capability of the plastic precision machining parts and plastic materials are decisive. Today, there are several advantages of using plastic materials over metal parts.

Plastic materials have properties and characteristics that contribute to the high quality of the finished products at reasonable costs. These properties include lightweight, high-impact resistance, corrosion resistance, easy processing, high-wear resistance and less roughness. Experts suggest that beside great savings, plastic materials increase productivity, improved appearance and long duration without the lubrication requirements. Polyethylene machining parts are also preferred due to their being recyclable and environment-friendly.

When it comes to aeronautics and aerospace technology, plastic machining is preferred over materials because the former can withstand heat. Nowadays, plastic materials and plastic machine parts are used in solid fuel booster and ablative shields to allow re-entry of space shuttles.

In manufacturing helicopters, plastic materials and plastic precision machining play a key role for its durability, flexibility and capacity to absorb vibrations. Its being strong means the weight of the aircraft can be reduced without compromising quality and safety.

During World War II, plastic was first introduced as a substitute for rubber machining and items such as fuel-tank linings, flier’s boots and so forth. Today, plastic industry continues to evolve with technology. If your needs fall under the category of pipe systems, plastic machining is very helpful in few ways. First, it is cost-efficient as far as installation and equipment are concerned. Second, plastic precision machining and plastic materials require less maintenance. Third, they last longer than the metal counterparts.

Plastic machining including all plastic materials and plastic parts does not decompose. In fact, this property is advantageous because it allow engineers and manufacturers to recycle the plastic parts and materials. Its source is oil. However, scientists today are doing their best efforts to produce plastic from vegetable oil.