Working Principle and Usage Guide of Powder Molding Machines

2023-01-19 12:31

The powder forming machine is a specialized device developed for powder metallurgy, ceramics, cemented carbides, magnetic materials, electrical contacts, and related industries. It incorporates advanced integrated control and drive technologies that combine mechanical, electrical, hydraulic, pneumatic, and instrumentation systems. Depending on the specific forming requirements of each product, the machine employs cutting-edge, proprietary electrical control technology, enabling flexible programming of the motion sequences for each individual step‑drive component via a touch screen.

　　The powder forming machine is a specialized device developed for the powder metallurgy, ceramics, cemented carbide, magnetic materials, electrical contact, and related industries. It incorporates advanced integrated control and drive technologies that seamlessly integrate mechanical, electrical, hydraulic, pneumatic, and instrumentation systems. Tailored to meet the forming requirements of individual parts, this machine employs cutting-edge, proprietary electrical control technology, enabling flexible programming of the motion sequences for each component’s stepper‑drive units directly on the touch screen—without the need to modify the internal software. This capability ensures compliance with the demanding compaction‑forming needs of the powder metallurgy sector, where part geometries are complex and stepper‑drive configurations are highly diverse, while maintaining exceptional versatility.

　　Powder forming machines are one of the most common applications of hydraulic presses. As the name suggests, powder presses are used to shape powdered materials of various types. With the aid of a die, a specific pressure is applied by the hydraulic press to produce parts with the desired dimensions and properties. Common applications include metal powders, ceramic powders, and powder metallurgy.

　　The operating principle of a powder molding machine is similar to that of an injection molding device: it uses the thrust of a screw to inject plasticized, molten material into a closed mold cavity, where it solidifies and takes shape, yielding a finished part. Injection molding is a cyclical process, with each cycle typically comprising the following steps: metered material charging, pressure injection, melt plasticization, mold filling and cooling, and mold opening for part removal. After the molded part is ejected, the mold is closed again, and the next cycle begins.

　　Use of the powder compaction machine: 1. Before operation, thoroughly inspect the punch and die set for defects such as chipped edges, cracks, deformation, or uneven tightness, and verify that all components are complete and in good condition. 2. Ensure that the powdered granular material is dry, with a moisture content not exceeding 10%. If the material fails to meet these criteria, do not force compaction, as this could compromise the machine’s proper functioning, reduce its service life, and increase raw material waste. 3. Perform a trial run: set the pressure regulator indicator to position 6, load the powder into the hopper, and manually rotate the trial‑run wheel. Gradually adjust the fill rate and compression pressure until the tablet weight and hardness conform to the specified requirements. During production, regularly check tablet quality against established standards and make adjustments as needed. 4. The selected speed directly affects the machine’s service life. Due to variations in raw material properties and viscosity, as well as differences in tablet diameter and compression pressure, no single setting can universally accommodate all conditions. This machine is equipped with a continuously variable transmission, making it suitable for compressing minerals, plant extracts, large‑diameter tablets, and other materials that are difficult to form at either high or low speeds. 5. Operators must be familiar with the equipment’s technical specifications, internal structure, operating principles, and proper working procedures to prevent component failure or damage and ensure safe production.

　　The powder compaction machine presses granular and powdered raw materials into a variety of standard and custom-shaped parts, making it ideal for producing large‑size components that demand high density. In addition, the equipment offers high precision, features a simple and easy‑to‑learn die‑change system, and is well suited for high‑volume production. All operations are controlled by a microcomputer‑based PLC, ensuring automated, continuous operation, with adjustable settings for compaction time, pressure, and part thickness.

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