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Diced shiitake mushrooms are an essential ingredient in many food products, including mushroom sauces, seasonings, instant noodle condiments and ready‑to‑eat snacks. From dicing and drying to final packaging, screening and classification are the critical steps that determine product quality.
However, screening diced shiitake mushrooms is not straightforward.
Dried diced shiitake mushrooms are irregular in shape and vary in size. They include acceptable‑size pieces, oversized fragments, excessive fines, and impurities that may be introduced during processing. If classification is not performed, large pieces mixed into the final product will affect taste uniformity, while excessive fines will compromise product appearance and reconstitution performance. More importantly, edible fungus processing involves strict food safety requirements – the materials, sealing and cleanability of equipment that contacts the product must all comply with food production standards.
To address the above needs of dried edible fungus processing plants, Gaofu Machinery has developed the SZF series food‑grade linear vibrating screen for diced shiitake mushrooms. With a 304 stainless steel body for food safety, multi‑deck design for one‑feed multi‑fraction classification, and a fully enclosed structure for dust control, it provides a professional solution for the standardised classification of diced shiitake mushrooms.
The Gaofu SZF series linear vibrating screen operates on the dual vibration motor synchronous counter‑rotation drive principle. When the two vibration motors rotate in opposite directions, the horizontal excitation forces cancel each other out while the vertical excitation forces add together, driving the screen box in a high‑frequency linear reciprocating motion. Material entering the screen surface moves forward in a parabolic jumping trajectory under the combined action of excitation force and gravity – acceptable material smaller than the mesh openings passes through the screen quickly, while oversized fragments and impurities are rapidly discharged along the screen surface.
This screening method offers three advantages for diced shiitake mushroom classification:
First, high processing speed suitable for production line operation. The material moves forward in a jumping linear motion on the screen surface, with high travel speed and a large amount of material passing through the screen per unit time. The equipment can run 24 hours a day continuously and stably, fully matching the large‑scale continuous production rhythm of edible fungus processing plants.
Second, high classification accuracy with no cross‑contamination between grades. The Gaofu linear vibrating screen features a unique screen mounting structure that ensures uniform particle size after screening, with no cross‑contamination between grades. Screening accuracy can reach over 95% , ensuring particle size consistency for every batch of diced shiitake mushrooms.
Third, flexible configuration with multi‑deck classification in a single pass. The equipment supports 1 to 5 screen decks , allowing a single feed to achieve precise classification of 2 to 6 different particle size fractions simultaneously. One machine replaces multiple single‑deck screens in series, greatly reducing equipment investment and process transfer time.
Dried edible fungi are used directly in food processing, so equipment materials and hygiene standards must meet strict requirements. The Gaofu food‑grade linear vibrating screen for diced shiitake mushrooms incorporates systematic design in the following areas:
304 stainless steel body – corrosion‑resistant and durable. The entire machine is made of high‑quality 304 stainless steel , with a sturdy structure, corrosion resistance and durability. 304 stainless steel offers good corrosion resistance and oxidation resistance, and does not release harmful substances into the material, ensuring food safety from the material source. For production lines requiring even higher cleanliness, 316L stainless steel is also available.
Rounded corners – no hygiene dead corners. The equipment features rounded corner design with no hygiene dead corners, making it easy to clean and preventing material accumulation. Dried diced shiitake mushrooms may generate fines and debris during screening; if the equipment has dead corners, residual material will breed bacteria and contaminate subsequent batches. The rounded, dead‑corner‑free design allows fast and thorough cleaning, effectively preventing cross‑contamination.
Fully enclosed frame – dust and contamination protection. The equipment has a fully enclosed frame structure , with screening taking place inside a sealed chamber. The fully enclosed design provides three assurances: preventing dust escape, improving the workshop environment; preventing foreign matter from entering the screening system, ensuring the purity of the diced shiitake mushrooms; and reducing material loss, improving raw material utilisation.
Screen tensioned mounting – quick replacement. The screen uses a tensioned mounting structure that allows quick replacement without special tools. Different specifications of diced shiitake mushrooms require different mesh sizes, and the quick‑change screen design enables rapid specification changes, greatly reducing downtime.
Diced shiitake mushroom products often require more than one particle size grade. Different product categories and end‑use applications have different requirements – mushroom sauces need medium‑sized pieces, instant noodle seasoning packets need finer particles, and ready‑to‑eat snacks need uniformly shaped pieces.
The multi‑deck design of the Gaofu SZF series linear vibrating screen allows a single machine to meet the classification needs of different grades of diced shiitake mushrooms. Taking a three‑deck configuration as an example:
First deck (coarser mesh): Intercepts oversized fragments and foreign matter that may be introduced during processing. Oversize material is discharged from the top outlet and can be returned for reprocessing.
Second deck (target mesh): Collects the acceptable‑size finished diced shiitake mushrooms – this is the largest‑volume intermediate product.
Third deck (finer mesh): Separates fines and debris. Fines are discharged from the bottom outlet and can be used for seasonings or other purposes.
One machine, one feed – simultaneously completes the three steps of coarse impurity removal, target classification and fine separation. For manufacturers that need to produce different grades of diced shiitake mushrooms, the multi‑deck design greatly reduces equipment investment and process transfer time.
Advantage 1: High screening accuracy – quality assured. Screening accuracy can reach over 95% . After screening, the diced shiitake mushroom pieces are uniform in size, effectively eliminating cross‑contamination between grades. The finished product has consistent particle size, meeting the strict raw material specifications of different end‑use applications.
Advantage 2: High capacity – suited to large‑scale production. The equipment covers models from SZF‑520 to SZF‑1540 , with capacities ranging from 15 to 500 tonnes per hour. Whether it is a small to medium‑sized edible fungus processing plant processing a few tonnes per day or a large enterprise handling hundreds of tonnes per day, there is a capacity configuration to match. The equipment can run 24 hours continuously and stably , effectively supporting large‑scale production line operations.
Advantage 3: Fully enclosed structure – environmentally friendly. The equipment features a fully enclosed structure with no dust escape and automatic discharge. Fines generated during the screening of dried diced shiitake mushrooms are effectively contained within the equipment, workshop dust concentration is controlled, operator occupational health is protected, and increasingly strict environmental regulatory requirements are met.
Advantage 4: Low energy consumption, low noise, easy maintenance. The vibration motors are optimised for low noise, low energy consumption and long service life. The whole machine has a simple structure with few wearing parts, requiring minimal routine maintenance. Screen changes require no special tools, greatly reducing downtime and maintenance costs.
Advantage 5: Adjustable excitation angle – adaptable to different materials. The excitation angle of the equipment is adjustable, making it adaptable to different material characteristics. For diced shiitake mushrooms with different moisture contents and shapes, the vibration parameters can be adjusted to optimise the motion trajectory and residence time on the screen surface, ensuring thorough screening.
The Gaofu SZF series food‑grade linear vibrating screen for diced shiitake mushrooms is suitable for the following dried edible fungus processing applications:
Finished diced shiitake mushroom classification. Classifying dried diced shiitake mushrooms into large, medium and small grades to meet the needs of different end‑use applications. Multi‑deck screens complete multi‑stage classification with a single feed, ensuring uniform finished particle size.
Raw material impurity removal. Removing fragments, dust, impurities and foreign matter that may be mixed into diced shiitake mushroom raw materials, ensuring raw material purity for subsequent processing steps.
Screening pre‑treatment for edible fungus compound ingredients. As an ingredient in compound seasonings, instant noodle seasoning packets and other products, diced shiitake mushrooms must be de‑dedusted and classified before entering the mixing step. The linear vibrating screen completes preliminary screening at the raw material pre‑treatment stage, creating conditions for precise batching and mixing.
Screening and classification of other dried edible fungi. Screening, classification and impurity removal of similar dried edible fungus materials such as dried wood ear fragments and mushroom granules.
Food Industry Client Testimonials
Nestlé, CP Group, Haitian Flavour & Fragrance, Yihai Kerry, Yili, Mengniu,Shuanghui, Wahaha, Master Kong, Want Want, Anjoy Foods, Angel Yeast,Yangyuan Foods, Uni-President Enterprises, Qiaqia Food, Luhua Group,Alpenliebe, Golden Monkey, Orion, Xizhilang,Sanquan Foods, Synear Food, Oishi, Wong Lo Kat, Yanjing Beer, Seamild,Jinpai, Chubang, Hengshun Vinegar Industry, Longda Group, Beijing Daoxiangcun, Anhe Dairy,Weiwei Group, Xiangpiaopiao, Maiquer, Tianbing, Binqi Food, Ligao Okun
