What are the structures of the plastic mold

What are the structures of the plastic mold

What are the structures of the plastic mold
Plastic mold is a kind of combination mold used for compression molding, extrusion molding, injection molding, blow molding and low foaming molding. A series of plastic parts with different shapes and sizes can be processed with the coordinated changes of the convex, concave and auxiliary molding systems. What structures are plastic molds made of?

  1. Mold base: generally, we do not need to design it. We can order it directly from the standard mold base manufacturer, which greatly saves the time required for mold design. Therefore, it is called the plastic mold standard mold base. It constitutes the most basic framework of the plastic mold.
  2. Mold core: The mold core is the core of the plastic mold, which is the most important part of the mold. The forming part of plastic products is in the mold core, and most of the time's processing is also spent on the mold core. However, some relatively simple molds have no mold core, and the products are directly formed on the template. Most of the early plastic molds are like this, which is relatively backward.
  3. Auxiliary parts: common auxiliary parts of plastic mold include locating ring, injection sleeve, ejector pin, grab pin, support column, ejector plate guide post guide sleeve, garbage nail, etc. Some of them are standard parts, which can be ordered directly when ordering the mold base, and some of them need to be designed by themselves.
  4. Auxiliary system: There are four auxiliary systems for plastic mold: gating system, ejection system, cooling system and exhaust system. Sometimes, because the plastic materials used need to be heated at a very high temperature, some molds also have a heating system.
  5. Auxiliary setting: The auxiliary setting of the plastic mold includes lifting eye hole, KO hole (jacking rod hole), etc.
  6. Dead corner processing structure: When the plastic mold has dead corners, the mold will also have one or more dead corner processing structures. Such as sliding block, inclined jack, hydraulic cylinder, etc. In most books in China, this mechanism for dealing with dead corners is called "core pulling mechanism".

  7. In fact, plastic mold is not difficult. No matter how the plastic product changes, the structure of the mold for forming this plastic product is nothing more than the above aspects. The difference between molds is that the mold is large or small, and the location or mode of each auxiliary part, auxiliary setting, and auxiliary system is different. The method, structure and size of dealing with dead corners have changed. Of course, design experience is particularly important to make the designed die simple to process, convenient to assemble, long life, moderate price and good formed products. With good experience, we can deal with the problems in design and processing, and we are more confident in the treatment of design change.

A plastic mold is a specialized tool used in the manufacturing process of plastic products. It is designed to shape raw plastic materials into specific shapes, sizes, and dimensions according to the requirements of the product design. The structure of a plastic mold is an essential component that determines the mold's quality, durability, and overall effectiveness. Here are some of the structures of plastic molds:

  1. Cavity: The cavity is the portion of the mold that forms the shape of the product. It is the negative space that is created when the mold is closed, and plastic is injected into it. The number and size of cavities in a mold depend on the product's design and the required production volume.
  2. Core: The core is the positive component of the mold that creates holes or indentations in the product. It is usually located inside the cavity and is used to create features such as screw holes, slots, or other types of openings.
  3. Sprue: The sprue is the channel through which plastic is injected into the mold cavity. It is typically located at the bottom of the mold and is attached to the injection unit of the molding machine.
  4. Runner: The runner is the channel that connects the sprue to the cavity. It is responsible for distributing the plastic evenly throughout the mold and ensuring that each cavity is filled with the correct amount of plastic.
  5. Ejector pins: The ejector pins are used to remove the finished product from the mold. They are located on the back of the mold and are activated by the ejection system of the molding machine.
  6. Cooling system: The cooling system is an essential component of the mold structure. It is used to control the temperature of the mold during the injection process, preventing the plastic from deforming or warping. The cooling system typically consists of water channels or other cooling mechanisms that are integrated into the mold design.

In conclusion, the structure of a plastic mold is a complex system of components that work together to create high-quality plastic products. The cavity, core, sprue, runner, ejector pins, and cooling system are all critical components that must be designed and integrated correctly to ensure the best possible results. A well-designed mold structure can help to minimize waste, reduce production times, and improve the overall quality and consistency of the finished product.

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