The Fundamentals of a Powder Production Line

The Fundamentals of a Powder Production Line

Powder Production Line can reduce the number of subtractive processes used in manufacturing, improving surface finish and allowing for higher repeatable accuracy. It can also help to shorten production times.

Once the mix is perfect, the powder is fed into a die cavity. The press applies a massive amount of force, forcing the particles to mechanically interlock.

Feeding System

The feeding system is a key component of powder additive manufacturing systems. It is used to meter powder materials into the extruder. It can be operated in either full remote mode, where the feeder is Powder Production Line controlled by an external robot or process controller, or stand-alone mode, where it is manually controlled by a user. In both modes, the Twin 150 multi-process powder feeder can operate at a variety of feed rates and can be adjusted to meet specific plant requirements.

Nutritional powder production line equipment includes a dryer, grinder and mixers, which can deal with buckwheat, oats, rice, lily, lotus seed, soybean and red date. Compared with traditional baby food processing methods, the nutritional powder machine can produce more nutritious and healthy foods for babies, especially in their early stages of life, when they are the most vulnerable.

The feed bin is equipped with a venturi-injector stage lifter to make sure that the material can be lifted and conveyed smoothly. The flanges between the inlet and outlet are airtight, which makes it possible to convey powder materials without dust spread. The feeding conveyor is also equipped with a special transfer dish that can make the whole transmission line run smoothly, with little dilapidation against materials and slow curve conveying. This helps improve the accuracy of powder feeding.

Mixing System

The mixing & blending system of a powder production line is the heart of the entire process. Having a properly configured mixer allows your operation to reduce cycle times, simplify clean-up, and enhance batch-to-batch consistency.

The best solution for most applications is an inline high-shear powder mixer. This is typically integrated into a circulation loop connected to a large batch tank. Liquid ingredients are pumped into the mixer via a funnel. Then, a valve under the funnel opens to allow powdered materials to be added through a chute. The mixer’s rotor-stator and single rings then pre-mix the powders with the liquid, reducing overall mixing time.

A proper mixing design also helps to limit powder degradation by using lower mixing speeds and ensuring adequate air circulation inside the mixer. These factors can significantly increase production efficiency and product quality.

Many processors seek to achieve the shortest mixing times possible to improve line productivity, but excessive mixing speeds can compromise product quality by increasing particle breakage. In addition, mixing equipment can be expensive to operate and maintain when manufacturers tack on extra fees for components and services.

A well-configured, custom powder blending system can cut overall production costs by up to 30%. This is especially true for smaller operations that can leverage a vertically organized OEM to provide consistent, standardized equipment at the same price across multiple locations.

Conveying System

Using an efficient powder conveying system can help your plant save money, time and resources. This is because it reduces labor costs filling machinery by eliminating manual transfer processes such as hand scooping. Moreover, it prevents product loss due to evaporation or dust during transfers. In fact, a vacuum conveyor can also reclaim expensive ingredients and recycle them back into the system.

The best powder conveying method for your facility depends on several factors, including the pickup point, distance to transport and the bulk density of the material. The pickup point can be a bag dump station, wand, hopper, silo or railcar. A vacuum conveyor system is the safest option as it uses an enclosed pipeline to move materials, protecting them from external contamination.

Additionally, these systems are hygienic and provide a dust-free environment for your workers. They come with crevice-free surfaces and fully sealed systems to prevent contamination from air, allowing them to meet industry regulations. This ensures that particulates that can endanger worker safety, jam expensive equipment or cause cross-contamination do not escape the system. In addition, they use stainless steel construction and FDA compliant seals, and the piping is CIP-compatible. A powder transfer system is also less costly than a mechanical transfer system because it eliminates hoists and handling equipment above the reactor, reducing maintenance costs and downtime.

Sintering System

The sintering system is the final step in all metal powder-related manufacturing processes, including PIM/MIM and 3D binder-jet printing. In sintering, the lubricant (typically water or wax) in the green compact is removed by heat. This removes a portion of the void volume in the green compact, creating a sintered metal part with very low porosity and excellent mechanical properties.

The temperature is ramped up to a point below the melting point of the material, and the particle surfaces fuse together via a variety of mechanisms. During this stage, the average pore size decreases through pore coalescence and surface diffusion and the particle density increases by repacking and grain growth.

The sintering process is the key to producing high-quality metal parts with good mechanical, dielectric and thermal performance. Desktop Metal uses this technology in its production process to produce a high-density, polymer-free metal that has no evidence of its powder particles or fabrication process, and is isotropic, meaning it exhibits the same physical properties in all directions. This makes it ideal for a wide range of applications, from wear components and engine components to consumer goods and medical devices. Sintering is also used in conventional powder forging and injection molding to make a variety of metallic components. Liquid phase sintering is another type of sintering process that is used in some hard-to-sinter metals, such as brass, bronze and soft iron magnetic alloys.

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