The difference between injection molding parts and machining parts

Injection molding parts and machining parts, like two completely different art forms, are both manufacturing methods, but they have their own unique styles and expressions. There are significant differences in manufacturing process, material application, surface treatment, shape accuracy and production efficiency.

First of all, injection molding is a process of melting and filling plastic raw materials into a mold, and then cooling and solidifying to obtain plastic parts with the same shape and size as the mold. This process is like the solidification of syrup into candy. After time polishing and mold shaping, a plastic work that meets expectations is finally obtained. Injection molded parts usually have smooth surface and uniform texture, just like delicate porcelain, which has high dimensional accuracy and diverse shapes and is widely used in electronic products, automobile parts, medical devices and other fields.

However, machining is a technological method to process raw materials into required shapes and sizes by cutting, grinding and drilling. This process is more like a sculptor carving a stone with a chisel, removing the excess parts and shaping the expected shape. The machined parts have rough surface and uneven texture, just like the texture of stone. At the same time, the machining process will produce waste and pollution, but it also means that it can manufacture parts with complex shapes and high precision, so it is widely used in aerospace, machinery manufacturing and other fields.

In addition, there are differences between injection molding and machining in production efficiency, cost and scope of application. Injection molding is a mass production method, just like gears on industrial production lines, which can produce a large number of the same parts quickly, so the production cost is relatively low. Machining is more suitable for single piece or small batch production, because each piece of work needs to be carefully carved and polished, so the manufacturing process is more flexible, but the production cost is relatively high.

Generally speaking, there are obvious differences between injection molding parts and machining parts in manufacturing technology, materials, surface quality, shape accuracy and production efficiency. The choice of manufacturing method needs to be comprehensively considered according to the requirements of the product, production efficiency and cost, just like choosing ups and downs in a banquet, each has its own advantages and uses. In addition, injection molding and machining are also different in application fields. Injection molding parts are widely used in electronic products, automobile parts, medical devices and other fields because of their high precision, diverse shapes and high production efficiency. For example, mobile phone cases, circuit boards, automobile interiors and so on are all common injection-molded parts. Machined parts are mainly used in aerospace, machinery manufacturing and other fields because of their high precision, high strength and complex shape. For example, turbine blades, bearing seats, gears and so on are typical machining parts.

At the same time, injection molding and machining are also different in environmental protection. Injection molding process is often used in mass production because of its high production efficiency and low cost, so a lot of waste and pollution may be produced in the production process. However, although the production cost of single piece or small batch is high, machining has advantages in environmental protection, because it will not produce a lot of waste and pollution, and its impact on the environment is relatively small.

To sum up, there are significant differences between injection molding parts and machining parts in manufacturing technology, materials, surface quality, shape accuracy, production efficiency, application fields and environmental protection. In the actual production process, it is necessary to comprehensively consider the specific requirements of products, production efficiency and cost, and select the most suitable manufacturing method. Just like cooking a delicious food, you need to combine the characteristics of ingredients and cooking skills to make the most delicious food.

Injection molding parts need to make plastic molds. If the output is not high, then each part needs to share the mold cost. If the mold costs 20,000 yuan. If only 2000PCS are produced, the cost of each part will be shared with the cost of 10 yuan.

Machining parts will create another problem. Here are two examples. First, if the hole ratio of some parts is small and deep, then such a structure needs special equipment to process it. Suppliers are not so easy to find. On the other hand, if special tools are needed in machining, the supplier will also ask you to share the cost, just as I said above that injection parts need to share the mold cost.

Because injection molding parts are involved in drawing, most surfaces need to have a draft angle. Simply put, it is a cylindrical shape and must be made into a cone. Then, after making it, because of the height, there are big head sizes and small head sizes. But this will affect the cooperation.

On the contrary, machining will make this cylindrical size quite perfect.

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