Over 10,000+ customers' choice, Focus on screening industry 40+ years
Cocoa powder is a core raw material in the chocolate, baking, solid beverage and ice cream industries. According to national standards, high‑fat cocoa powder has a cocoa butter content of ≥20.0%, medium‑fat cocoa powder 14.0%‑20.0%, and low‑fat cocoa powder 10.0%‑14.0%. In the industry, high‑fat cocoa powder typically has a cocoa butter content between 20.0% and 24.0%.
It is precisely this cocoa butter content, exceeding 20%, that makes cocoa powder a recognised "difficult‑to‑screen" material.
The natural oils in cocoa powder give it its unique flavour and mouthfeel, but they also create real challenges during screening. Coarsely ground cocoa powder is oily, adhesive and prone to agglomeration, making it very difficult for ordinary vibrating screens to handle – primarily due to severe oil‑induced screen blinding. During screening, oily fine powder adheres to the screen surface, gradually forming a dense "oil film" that continuously reduces the effective screening area. Industry case studies show that traditional rotary vibrating screens, when handling high‑fat cocoa powder, blind every 2 hours, with an average of 4 hours of downtime per day.
Even more challenging is that cocoa powder tends to generate static electricity during high‑speed motion. Fine powder adheres firmly to the screen surface due to electrostatic attraction, which, combined with oil adhesion, further aggravates blinding. Traditional vibrating screens, when handling high‑fat cocoa powder, often fall into the repetitive cycle of "blinding – stoppage – cleaning – blinding again." Every unscheduled stoppage represents lost capacity, increased labour costs, and disruption of continuous production rhythm.
Continuous screening of high‑fat cocoa powder requires a specialised machine that is "oil‑proof and non‑blinding."
The Gaofu anti‑sticking and anti‑blinding cocoa rotary vibrating sieve operates on the three‑dimensional gyratory motion principle. The equipment uses a vertical vibration motor as the excitation source, with eccentric weights installed at the upper and lower ends of the motor shaft converting the rotational motion into compound vibration in horizontal, vertical and tilting directions, which is then transmitted to the screen deck. By adjusting the phase angle of the upper and lower weights, the motion trajectory of the material on the screen surface can be changed.
The value of this three‑dimensional motion for high‑fat cocoa powder screening lies in three aspects:
First, thorough material dispersion, reducing local adhesion. The cocoa powder moves in a spiral outward trajectory on the screen surface, continuously rolling and shifting. Oily materials do not easily form adhesive layers locally during continuous motion, and oily fine powder is evenly dispersed rather than accumulating in concentrated areas.
Second, extended screening path and high accuracy. The material travels along a spiral trajectory, giving every cocoa particle multiple opportunities to contact the screen. The equipment can achieve screening fineness up to 500 mesh (0.028 mm) and filtration precision down to 5 microns. From conventional cocoa powder impurity removal to ultra‑fine cocoa powder precision classification, a single machine covers the full range of requirements.
Third, high processing capacity supporting continuous operation. The equipment supports 1 to 5 screen decks , enabling simultaneous separation into 2 to 6 grades. Impurities and oversize material are automatically discharged, enabling continuous operation. One machine, one feed – simultaneously completes impurity removal, classification and fine screening in a single pass.
To address the dual challenges of "oil adhesion + electrostatic adhesion" in high‑fat cocoa powder screening, the Gaofu anti‑sticking and anti‑blinding cocoa rotary vibrating sieve provides dual anti‑blinding protection.
Bouncing Ball Cleaning System – Physical Cleaning, Continuously Effective
Each screen deck is fitted with food‑grade silicone bouncing balls underneath. Under vibration, the balls generate high‑frequency, flexible tapping against the underside of the screen. Industry practice has proven that the bouncing ball solution enables high‑fat cocoa powder screening equipment to run continuously for 12 hours without blinding, with throughput increased by 3 times.
The bouncing ball cleaning system runs continuously and automatically without manual intervention, making it suitable for most high‑fat cocoa powder continuous screening applications.
Ultrasonic Cleaning System – Breaking Electrostatic and Ultra‑Fine Powder Adhesion
For ultra‑fine cocoa powder (above 200 mesh) or applications with more severe electrostatic adhesion, the Gaofu anti‑sticking and anti‑blinding cocoa rotary vibrating sieve can be equipped with an optional ultrasonic cleaning system. The ultrasonic system superimposes a high‑frequency, low‑amplitude vibration wave on the screen surface, subjecting ultra‑fine powder particles to significant ultrasonic acceleration that keeps the material in a suspended state on the screen – effectively inhibiting adhesion, friction, wedging and other blinding factors.
The ultrasonic rotary vibrating sieve truly solves the screening difficulties of materials with strong adsorption, easy agglomeration, high adhesion, high static charge, and ultra‑fine particle characteristics. The material on the screen undergoes low‑frequency three‑dimensional vibration while simultaneously experiencing ultrasonic vibration – both preventing mesh blinding and improving screening throughput and accuracy.
With the dual anti‑blinding mechanisms of bouncing balls and ultrasonics working together , continuous screening of high‑fat cocoa powder is transformed from "blinding every 2 hours" to "continuous operation for 12 hours or more without blinding" – delivering a qualitative improvement in overall equipment effectiveness.
Cocoa powder is used directly in chocolate, baking, beverage and other food processing applications, so equipment materials and hygiene standards must meet strict requirements. The Gaofu anti‑sticking and anti‑blinding cocoa rotary vibrating sieve incorporates systematic design in the following areas:
Food‑grade stainless steel. All material‑contact parts are made of food‑grade 304 stainless steel , complying with food safety production standards. The equipment is optimised for the fine, easily caking and hygroscopic characteristics of cocoa powder, with tight sealing that effectively removes lumps, impurities and coarse particles from cocoa powder, ensuring uniform particle size. For production lines requiring even higher cleanliness, 316L stainless steel is available.
Fully enclosed sealed structure. The equipment has a fully enclosed design, effectively preventing dust escape and material moisture absorption during screening. The seal is tight, with no powder escape. The fully enclosed structure also blocks external moisture and foreign matter from entering the screening system, reducing the risk of secondary moisture absorption of the cocoa powder.
Dead‑corner‑free design. The simple structure has no hygiene dead corners and supports rapid disassembly for cleaning. The equipment can be opened quickly for thorough cleaning, inspection and screen changes.
Quick‑change screen structure. The mother‑child screen frame structure allows screen changes in just 3 to 5 minutes. Switching between different mesh sizes is convenient and efficient, greatly reducing downtime.
From the perspective of actual production conditions in high‑fat cocoa powder continuous processing, the Gaofu anti‑sticking and anti‑blinding cocoa rotary vibrating sieve delivers value in four dimensions:
Efficiency value – The dual anti‑blinding mechanisms of bouncing balls and ultrasonics enable the equipment to run continuously for extended periods, fundamentally improving the traditional situation of blinding every 2 hours. Continuous operation for 12 hours without blinding, with throughput increased by 3 times. The production line no longer needs to stop frequently because of blinding, and overall capacity is fully utilised.
Quality value – Lumps, impurities and coarse particles are effectively removed from the cocoa powder, resulting in uniform finished particle size. Cocoa powder fineness is precisely controllable, meeting the strict quality requirements of chocolate production, baking ingredient processing and other applications.
Hygiene value – Food‑grade 304 stainless steel, the fully enclosed structure and dead‑corner‑free design make the equipment easy to clean with no material residue. This helps enterprises meet the hygiene requirements of food GMP and HACCP systems.
Compliance value – ISO 9001 quality management system certification and CE safety certification give the equipment a compliance advantage in both export and domestic premium markets. Standardised classification equipment and regulated process flows give products stronger compliance credibility during quality inspections and customer factory audits.
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
About Gaofu
Xinxiang Gaofu Machinery Co., Ltd. was founded back in the 1980s. With over 40 years of development, it has been certified as a National-level Specialized, Refined, Unique & Innovative Little Giant Enterprise, National Green Factory, National High-tech Enterprise, and National Intellectual Property Advantage Enterprise, and serves as the President Unit of China Vibration Screening Industry Association.
The company is accredited with the Henan Provincial Industrial Design Center, Henan Provincial Engineering Technology Research Center for Intelligent On-line Screening System, and Xinxiang Municipal Engineering Technology Research Center for Fine Screening.
Gaofu has obtained more than 500 patents including invention patents, utility model patents and design patents, been awarded the Science and Technology Achievement Prize issued by the Ministry of Industry and Information Technology of China, and participated in drafting and formulating 4 national standards.
Gaofu's product portfolio covers multiple series and hundreds of specifications, including vibrating screening equipment, conveying equipment, coal crushing equipment, filtration equipment and automatic material handling systems.
Core products include vibrating screens, screening machines, vibratory sifters, rotary vibrating screens, ultrasonic vibrating screens, linear vibrating screens, airflow screens, gyratory screens, roller screens, dewatering screens, bar screens, vacuum feeding machines, dust-free feeding stations, bulk bag feeding stations, feeding systems, automatic powder feeding systems, automatic slag-discharging filters, leaf filters, clay filters, toothed roll crushers, coal crushers and other machinery.
These products are widely applied in food, pharmaceutical, chemical, metallurgy, construction materials, mining, thermal power, environmental protection and many other industries, winning recognition and trust from over 10,000 clients worldwide.
Gaofu products enjoy strong sales across Greater China, and are exported to more than 100 countries and regions such as Russia, Canada, the United States, New Zealand, Japan, Brazil and South Africa.
Upholding the corporate mission of Improving material quality & efficiency to fully satisfy customer demands, Gaofu maintains long-term partnerships with clients to achieve win-win development.
At present, Gaofu is an official qualified supplier for numerous Fortune Global 500 enterprises, including CNPC, Sinopec, Sinochem Holdings, China Resources Group, Sinopharm Group, COFCO, China National Building Material, China Aerospace Science and Technology Corporation, Jinchuan Group and more.
Gaofu Machinery ranks No.1 in global sales volume of vibrating screens.
In May 2024, Frost & Sullivan, a world-renowned international consulting firm, issued a Market Position Verification Certificate confirming that Gaofu achieved the world's largest shipment volume of vibrating screens in the global market in 2023.
