What is a precision injection mold?

Precision injection molds are molds used in the production of plastic products to manufacture high precision and high quality plastic products. Compared with ordinary injection molds, precision injection molds have more stringent requirements in design, manufacturing and processing to meet the needs of products with minute dimensions, tolerances, complex shapes, assembly, insertion and removal, and waterproofing.

I. Characteristics of precision injection molds

1. High precision requirements

Precision injection molds need to achieve micron-level manufacturing tolerances, mold parts in the processing of micron-level tolerances in order to control the tolerance of injection molded plastic products between 0.01mm-0.05mm. And in the process of mold design and processing, it is necessary to consider factors such as material shrinkage, processing precision and assembly precision.

2. Complex structures

In order to meet the needs of complex products, precision molds often have complex cavity structures and multiple release mechanisms. This requires precision machining and ingenious structural design.

3. High-quality materials

Precision molds usually use high-quality mold steel, such as NAK80, H13, S136, SKD51 and so on. These materials have good wear resistance, polishability and heat treatment properties, which can ensure the service life of the mold and product quality.

4. Precision machining technology

In the manufacture of precision molds, advanced processing technologies such as CNC machining, precision grinder machining, electrical discharge machining, and slow-wire machining are widely used to achieve the required accuracy and surface quality.

Second, the main points of the design of precision injection molds

1. Reasonable mold structure design

Under the premise of ensuring product quality, the mold design should simplify the structure as much as possible to facilitate processing and maintenance. At the same time, it is necessary to consider the design of the cooling system, pouring system and exhaust system of the mold in order to improve production efficiency and product quality.

2. Precise dimensional control

During the design process, the dimensions and tolerances of the product need to be calculated accurately, taking into account the fluidity and shrinkage of the material to ensure that the final product meets the design requirements.

3. Material selection

According to the use of products and production batch, select the appropriate mold material and surface treatment, and with a cycle of maintenance, in order to extend the life of the mold and reduce production costs.

Third, the application areas of precision injection molds

• electronic communication: Cell phone housings, connectors, sensors, and other products that have very high requirements for size and appearance.
• medical equipment: Syringes, precision medical components, and other products that need to meet strict hygiene and precision requirements.
• automobile industry: Key components such as engine parts, instrument panels, precision gears, etc.
• aerospace: Complex components made of high-performance engineering plastics that are subjected to special environmental conditions.

IV. Importance of precision injection molds

Precision injection mold is an indispensable basic tool in high-end manufacturing. Its quality directly affects the accuracy, performance and appearance of products. With the development of industrial products towards miniaturization, complexity and high performance, the market demand for precision injection molds is also growing.

V. Future development trends

With the continuous emergence of new materials, new processes and new technologies, precision injection molds will develop in the direction of more intelligent and automated. For example, the use of CAD/CAM/CAE and other digital technology for mold design and simulation can greatly shorten the development cycle and improve design accuracy. At the same time, advanced processing equipment and processes, such as high-speed milling, five-axis linkage processing, etc., will also improve the level of mold manufacturing.

Techeng Technology is a professional supplier of precision injection molds, focusing on precision connector molds, sensor molds, high-temperature plastic open mold injection molding (such as PEEK, LCP, PBT, PEI, PPS, PPSU, PA66, etc. open mold injection molding production), TPU, TPE soft plastic overmolding, vertical hardware overmolding injection molding.