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  6. Contract processing (crushing, classification, drying, granulation, etc.)

Contract processing (crushing, classification, drying, granulation, etc.)

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last updated:Jan 21, 2026

セイシン企業
セイシン企業
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Providing the best contract processing environment, processing technology, and quality in the country for powder and granular processing. If you are considering outsourcing processing, please feel free to consult with us!

Since our establishment, we have pursued powder technology and accumulated experience, achievements, and know-how in powder processing. We provide products that meet our customers' needs. To accommodate various raw materials and processing, we have established four factories in Japan that perform crushing (from coarse to fine), drying, granulation, classification, and mixing. We have a diverse range of processing achievements for various raw materials, including ceramics, plastics, glass, chemical products and formulations, pharmaceuticals, pesticides, minerals, food, food additives, and flavors, among others. If you have any questions or requests regarding contract processing of powders and granules, please feel free to contact us.

    Contract manufacturingProcessing Contract
Jet_Mill.jpg

Contract processing (crushing, classification, drying, granulation, etc.)

Jet_Mill.jpg
Jet_Mill.jpg
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basic information

◇◆ 【Information on Contract Processing at Our 4 Factories in Japan】 ◆◇ ◆ Tone River Factory (Saitama Prefecture) - This is our largest factory, combining technical expertise and extensive know-how in the field of pulverization. In addition, we conduct drying, classification, granulation, and mixing processes. ◆ Hibikinada Factory (Fukuoka Prefecture) - This processing factory is located in Kitakyushu City. It mainly handles processing for the western Japan region. It performs pulverization, drying, classification, granulation, and mixing processes at a level comparable to the Tone River Factory. ◆ Nikko Factory (Tochigi Prefecture) - In addition to standard powder processing, we also perform pulverization of recycled PTFE (fluororesin). We have also established a dedicated fine pulverization processing line for food products. ◆ Yamaguchi Ube Kotobuki Factory (Yamaguchi Prefecture) - This is a food factory that primarily handles health foods and other food products. If you have any questions or considerations regarding contract processing or commissioned processing tests, please feel free to consult with us.

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Applications/Examples of results

◇◆ 【Examples of Contract Processing】 ◆◇ ◆ Ceramics ◆ Plastics-related ◆ Glass ◆ Chemicals and formulations-related ◆ Pharmaceuticals ◆ Pesticides ◆ Mineral products ◆ Food, food additives, fragrances, etc.

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Model number overview
Contract processing - crushing Focusing on dry jet mills, we offer a range of grinding machines, including cutter mills and ball mills, capable of coarse grinding to ultra-fine grinding with average particle sizes of a few micrometers, as well as handling quantities from a few grams to several hundred tons per month, to meet our customers' diverse needs.
Contract processing drying Using air flow dryers, vacuum dryers, and shelf dryers, various materials such as slurries, cakes, and moisture-containing powders are dried to a high level.
Contract processing grading The wind classifier sorts the targeted particle size into a sharper state. Additionally, bulk processing can be performed using a vibrating sieve.
Contract processing - granulation and mixing Granulation: Our company's unique crushing and rolling granulator allows for granulation, mixing, and dispersion to be performed simultaneously.

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Powder and Granule Contract Processing Catalog

Powder and Granule Contract Processing Catalog

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Seishin Corporation, a comprehensive manufacturer of powder and granular equipment - "Product Information"

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セイシン企業

セイシン企業

Manufacturing and processing contract

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To create high-quality products, powder technology is an essential foundational technology. Since our establishment in 1968, we have consistently strived to acquire high-level powder technology. In particular, our contract processing division has become our mainstay, having cultivated extensive experience and achievements. We have responded to a wide range of customer requests, handling the processing of many materials and refining various processing techniques such as crushing, classification, mixing, drying, coating, and compounding. The fine powder products developed using the processing technologies gained from our extensive contract processing experience are our original offerings. These products utilize our unique chemical grinding technology, enabling us to achieve a level of grinding that cannot be obtained through other grinding methods, as well as allowing for special processing such as compounding with inorganic materials, compounding between resins, and surface coating.

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