Precision injection mold structure basic knowledge introduction

The basic components of injection mold structure mainly include mold cavity, gate, runner and barrel. The mold cavity is the key part that determines the shape and size of the plastic part, the gate is the channel that connects the barrel and the mold cavity, the flow channel is responsible for transferring the molten plastic in the barrel to the mold cavity, and the barrel is the place where the plastic raw materials are stored.

When designing the mold cavity, it is necessary to consider the shape, size, accuracy and other factors of the plastic parts to ensure that the plastic parts meet the design requirements. The location and shape of the gate also have an impact on the quality and production efficiency of the plastic parts. For example, if the gate is improperly positioned, the molten plastic may not fully fill the mold cavity, affecting the shape of the plastic part or causing defects. Therefore, in the injection mold design stage, the position and shape of the gate need to be optimized.

The layout of the runner will also affect the quality and production efficiency of the plastic parts. In general, the flow channels need to be distributed as evenly as possible over the entire mold cavity to ensure that the molten plastic can fill the mold cavity at the same rate. In addition, the size, shape, and location of the flow channels also need to be considered to ensure that the molten plastic does not overcool or solidify as it enters the mold cavity.

The barrel is the place where the plastic raw materials are stored, and its role is to heat the plastic raw materials to melt them, so that they can be injected into the mold of molten plastic. The barrel usually consists of an inner layer, an intermediate layer and an outer layer, the inner layer is usually made of a wear-resistant material, the intermediate layer is made of a heat transfer medium, and the outer layer is made of a metal. The temperature control of the cylinder is crucial for injection molding because it directly affects the flow properties and viscosity of the plastic.

The advantage of injection mold structure is that it can improve product quality, reduce costs, and improve production efficiency. First, injection molds can produce high-precision plastic parts, because the design of the mold cavity can precisely control the shape and size of the plastic parts. Secondly, injection molds can produce plastic parts on a large scale, thereby reducing production costs. In addition, due to the simple structure and convenient operation of the injection mold, the production process is more stable and the production efficiency has also been improved.

With the continuous progress of science and technology, the injection mold structure is also constantly developing and innovating. For example, new hot runner technology allows for more efficient distribution of molten plastic into mold cavities, further improving production efficiency. In addition, the application of 3D printing technology also provides new possibilities for the manufacture of injection molds.