Over 10,000+ customers' choice, Focus on screening industry 40+ years
Bakery ingredients have strict requirements for flour purity. During planting, harvesting, transport, and storage, flour may pick up various foreign materials – husks, weed seeds, stones, metal fragments, and packaging debris. At the same time, flour may form lumps due to moisture absorption during storage. If these lumps enter the mixing stage directly, they will cause uneven dough and hard spots in the finished product.
In traditional models, big bag unloading and flour screening are often two separate operations – after the big bag feeding station completes unloading, material is transferred by piping or manually to the screening equipment. This model has several obvious limitations:
Risk of secondary contamination during material transfer. Between the big bag feeding station and the screening equipment, material is exposed to the workshop environment, increasing the possibility of foreign matter contamination.
Large equipment footprint restricts workshop layout. Two separate machines occupy space individually – a considerable challenge for bakeries with limited floor space.
Disjointed workflow affects production efficiency. Unloading and screening operate independently, requiring manual or mechanical transfer between them, adding complexity and uncertainty to the production process.
Greater difficulty in dust control. Each additional transfer point creates another potential source of dust emission.
Gaofu's big bag feeding station integrates unloading and screening functions into a single unit – completing the entire process from big bag opening to flour screening on one equipment platform, fundamentally solving the above issues.
When configuring a big bag feeding station with flour screening in a bakery raw material workshop, the following design considerations deserve special attention:
Consideration 1: Sealing design of the big bag unloading system
Flour is a classic dust‑prone powder – dust control during big bag unloading is the primary concern. Gaofu's big bag feeding station features a fully enclosed structure. After the big bag is hoisted into position, the bag's discharge spout is sealed to the equipment feed inlet via a clamping device, forming an enclosed chamber. Bag opening and unloading are completed in this enclosed environment – dust is effectively contained within the equipment.
The equipment is equipped with a negative‑pressure dust collection system that continuously extracts air during unloading, capturing and processing any trace dust generated. Gaofu's feeding system uses fully enclosed pneumatic conveying design – raw materials never contact air or personnel from feeding through conveying – effectively controlling workshop dust concentration to ≤10 mg/m³, complying with the requirements of the General Hygiene Standard for Food Production (GB 14881‑2013).
Consideration 2: Proper configuration of the screening module
The screening function of the big bag feeding station is typically achieved through an integrated vibrating screening module. Material from the big bag is discharged directly onto the screen for screening. Gaofu's big bag feeding station screening module can be flexibly configured with screens according to the required mesh size – from routine impurity removal (20‑80 mesh) to fine grading (80‑200 mesh and above).
The screening module design should address the following details:
Screen material: Contact parts should be made of 304 or 316L stainless steel, with smooth, easy‑to‑clean surfaces.
Screen tensioning structure: Proper tensioning design ensures a flat screen surface and eliminates material accumulation dead corners.
Screen cleaning device: Flour fines easily block screens – bouncing‑ball or ultrasonic cleaning devices are recommended to maintain consistent screening efficiency.
Consideration 3: Configuration of assisted discharge devices
Flour in big bags may form lumps due to compression or moisture absorption during storage, and bridging may occur during discharge – material forms an arch structure inside the bag and cannot flow out by gravity alone. Gaofu's big bag feeding station is equipped with a tapping device and vibration device – the tapping device helps material flow out of the big bag, and the vibration device can break bridges. The tapper rhythmically taps the side wall of the big bag, effectively breaking material arches and ensuring smooth flow. The vibrator integrated into the bag clamp can be activated as needed – its high‑frequency micro‑vibration effectively dislodges material adhering to the bag wall, significantly reducing material residue.
Consideration 4: Hygienic design and cleanability
Bakery raw material workshops have strict hygiene requirements for equipment. All material‑contact parts of the big bag feeding station should be made of food‑grade stainless steel with finely polished surfaces, no dead corners, and easy cleaning. The equipment structure should support quick disassembly for routine cleaning and periodic sanitisation. Gaofu's big bag feeding station offers food‑contact parts in high‑quality SUS304 stainless steel, with finely polished surfaces that are smooth, burr‑free, and easy to clean.
Consideration 5: Integration with downstream conveying systems
After screening, flour needs to be conveyed through enclosed piping to the next process – mixers, storage tanks, or batching systems. Gaofu's big bag feeding station can be connected to positive‑ or negative‑pressure conveying systems for material supply to the production line, achieving fully enclosed operation from feeding to conveying. The screened fine flour is conveyed through enclosed piping to mixers or storage tanks – achieving integrated "screening‑conveying" operation that simplifies production line layout and improves efficiency.
The integrated unloading‑and‑screening big bag feeding station solution delivers multiple improvements in bakery raw material workshop applications:
Significantly improved workshop environment. The fully enclosed negative‑pressure design substantially reduces dust concentration in the feeding area – workshop air cleanliness is notably improved. After adopting Gaofu's feeding system, one bakery achieved workshop dust concentration at low levels, complying with food production hygiene standards.
Notably improved production efficiency. Unloading and screening are completed simultaneously – eliminating material transfer steps and reducing overall processing time. Gaofu's feeding system automated feeding is 3‑5 times faster than manual operation, increasing single‑line capacity by over 30%.
Raw material purity is ensured. Screening and impurity removal are completed at the feeding stage – lumps are effectively broken, and foreign matter is reliably intercepted – ensuring flour purity entering the next process is protected at the source.
Effective labour cost reduction. The automated feeding and integrated screening design significantly reduces manual intervention – one system can replace 3‑5 workers. After introducing Gaofu's feeding system, one medium‑sized bakery needed only 3 operators to complete the feeding work that previously required 8 people.
When configuring a big bag feeding station with flour screening for a bakery raw material workshop, consider the following aspects:
Define screening requirements. Determine the required screening mesh based on the quality requirements of the baked products – routine impurity removal for standard bread flour is typically 20‑80 mesh, while premium specialty flours may require finer screening precision.
Assess material characteristics. Flour's fineness, hygroscopicity, flowability, and other properties directly affect equipment configuration. Highly hygroscopic flour requires more reliable sealing design; poorly flowing flour requires more effective tapping and bridging‑breaking devices.
Pay attention to dust collection system performance. Flour dust control is a core selection consideration. Prioritise dust‑free feeding stations equipped with pulse‑jet baghouse filters – ensure filtration efficiency ≥99%, emission concentration ≤10 mg/m³.
Consider system expandability. The big bag feeding station is not a standalone device but the starting point of the entire production line. During selection, evaluate whether the equipment can be easily integrated with downstream conveying, batching, and mixing equipment.
Material and hygiene standards. All parts that contact flour should be made of food‑grade stainless steel with smooth, dead‑corner‑free surfaces for easy cleaning and sanitisation.
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
Fortune 500 Client Testimonials
CNPC、CSCEC、Sinochem Holdings、CRCC、China Minmetals Corporation、CNOOC、CR、Sinopharm、CHN Energy、COFCO Corporation、Huawei Technologies、PowerChina、CITIC Group、Wuchan Zhongda Group、NORINCO、Chalco、CNBM、 Shaanxi Coal and Chemical Industry Group、Ansteel Group、CETC、CSSC、CASC、CEC、Jinchuan Group、CASIC、Conch Cement、CNNC、SPH、Shanxi Coking Coal Group、 Zhongtai Chemical、GPHL、DEC、Sinosteel Corporation、MCC、China National Salt Industry Chemical、China Baowu Steel Group、China Animal Husbandry Industry Co., Ltd.、CECEP
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.
