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Injection Molding

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Injection Molding, Plastic and Metal Injection Molding Machine

This article is about injection molding, plastic and metal injection molding machines. As the name suggests, it is the main molding equipment used to make plastic products of various shapes from thermoplastics or thermosets using plastic molding molds (also called injection molding machines). It is also the equipment that undertakes the most important tasks in the modern injection molding process steps. Injection molding machines are widely used in the production of plastic parts, from medical devices to various tools; from the aerospace industry, to the most intensively used automotive industry, as well as common household items and children’s stationery, many of their components and even entire parts are produced by plastic injection molding. Whenever you look around, if there’s a plastic product nearby, it’s probably made by an injection molding machine.

Injection molding, also known as injection molding, is a method of injection and molding. The advantages of injection molding method are fast production speed, high efficiency, automation of operation, various colors, simple to complex shapes, large to small sizes, accurate product sizes, products that are easy to update and can become parts with complex shapes, injection molding method is suitable for mass production and complex shape products and other molding and processing fields.

At a certain temperature, the molten plastic material is stirred by a screw, injected into the mold cavity under high pressure, and cured by cooling to obtain a molded product. This method is suitable for mass production of complex shaped parts and is one of the important processing methods.

Injection Molding Overview Chart
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Metal Injection Molding (MIM) is a new powder metallurgy near-net molding technology derived from the plastic injection molding industry.

Metal Injection Molding (MIM) is a new powder metallurgy near-net molding technology derived from the plastic injection molding industry. It is well known that plastic injection molding technology is inexpensive and can produce a variety of complex shapes, but the strength of plastic products is not high. To improve their performance, metal or ceramic powders can be added to plastics to obtain products with high strength and good wear resistance. In recent years, this idea has evolved to maximize the solid particle content and to completely remove the binder and harden the molded blanks during the subsequent sintering process. This new method of powder metallurgy molding is known as metal injection molding.

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An injection molded product is a product that has been molded by an injection molding machine. It is a product that is molded with an injection molding machine by heating a plasticize plastic melt, then injecting it into the mold cavity of the molding mold, and after cooling, the melt is cured and demolded. It includes thermoplastics and now some thermoset injection molded products. Injection-molded products have a good prospect and are useful in various industries, such as automotive, medical, military, color cosmetics, toys, electronics, etc. Injection-molded products have basically penetrated into all industries.

Injection Molded Products
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Injection molding process refers to the process of making semi-finished parts of certain shapes by pressurizing, injecting, cooling and demolding the molten raw materials.

Plastic injection molding process mainly includes 6 stages such as mold closing – filling – (air-assisted, water-assisted) pressure-holding – cooling – mold opening – mold release. –Opening the mold – Demolding and other 6 stages. These 6 stages directly determine the molding quality of the product, and these 6 stages are a complete and Continuous process.

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An injection molding machine is also known as an injection molding machine or injection machine. It is the main molding machine that uses plastic molding molds to make thermoplastic or thermosetting plastics into various shapes of plastic products. There are vertical, horizontal and fully electric types. The injection molding machine heats the plastic and applies high pressure to the molten plastic, causing it to be ejected and filled into the mold cavity.

The zy-623 injection molding machine usually consists of injection system, mold closing system, hydraulic transmission system, electric control system, lubrication system, heating and cooling system, safety monitoring system, etc.

Its working principle is. When pre-molding, the screw in the plasticizing part is driven by the hydraulic motor to rotate the spindle, one end of the spindle is combined with the screw, and the other end is combined with the hydraulic motor, when the screw rotates, the material is plasticized, and the plasticized melt is pushed to the storage chamber at the front of the barrel, at the same time. The screw, under the reaction of the material, causes the thrust seat to return through the thrust bearing, and the piston rod is pulled back in a straight line through the nut When injecting, the oil entering the rod cavity of the injection cylinder pushes the piston rod through the bearing to complete the action, and the oil entering the rod cavity of the piston pushes the piston rod and the screw to complete the injection action.

Stainless steel parts manufacturing

The different types of injection molding machines are as follows.

According to the plasticization of raw materials and injection methods, injection molding machines can be divided into

  1. plunger type;
  2. reciprocating screw type;
  3. screw plasticized plunger injection type.

According to the different shapes and structures of injection molding machines, they can be further divided into:

  1.  vertical injection molding machines;
  2. horizontal injection molding machines;
  3. angular injection molding machines;
  4. multi-mode injection molding machines;
  5. combined injection molding machines.

According to the classification of processing capacity, injection molding machines can be divided into

  1. ultra-small injection molding machine;
  2. small injection molding machine;
  3. medium-sized injection molding machine;
  4. large injection molding machine
  5. super-large injection molding machine.

According to the classification of the use of injection molding machines can be divided into

  1. ordinary injection molding machine;
  2. exhaust injection molding machine;
  3. precision high-speed injection molding machine;
  4. plastic footwear injection molding machine;
  5. three-shot single-mode injection molding machine;
  6. double-shot double-mode injection molding machine.

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