What is Pig Dehairing Machine?
In the context of pig slaughtering machine, dehairing refers to the critical post-bleeding process that removes bristles from the carcass surface. The pig dehairing machine—also known as a hog dehairing equipment or continuous hog dehairer machine—is a specialized piece of slaughtering equipment designed to achieve clean, blemish-free carcasses at high throughput.
Before dehairing can occur, the carcass must first undergo scalding. After bleeding, the pig is washed with spray water or a washing machine to remove blood, manure, and other contaminants. It is then conveyed via overhead rail into a scalding tank or scalding tunnel. The scalding process uses heat to denature and contract the proteins in the hair follicles, loosening the hair root from the follicle and separating the epidermis to facilitate hair removal.
Scalding Parameters:
Immersion Scalding Tank: Approximately 5 minutes immersion time; initial water temperature around 70°C, maintained at 60–66°C thereafter.
Steam Scalding Tunnel: Internal temperature maintained at 59–62°C, with a dwell time of 6–8 minutes.
Once scalded, the carcass enters the pig dehairing machine. Inside the machine, soft and hard scraper blades rotate against the carcass, rubbing the hair off through friction. Simultaneously, 35°C warm water is sprayed onto the carcass. The dehairing cycle lasts only 30–60 seconds. Any remaining hair in hard-to-reach areas—such as behind the ears or inner thighs—is removed manually as a finishing step.
How the Spiral Pig Dehairing Machine Works
The spiral pig dehairing machine is a continuous-operation hog dehairing equipment specifically designed for medium and large-scale pig slaughtering lines. Its main structure consists of a frame, gear motor, U-shaped plates forming a tunnel, two soft dehairing shafts, a spray system, and a hair conveyor.
Operating Principle: The gear motor drives two dehairing drums in opposite rotation, causing the carcass inside the tunnel to tumble rapidly. Through mutual friction between the carcass, dehairing blades, and U-shaped plates, the hair is effectively removed. The carcass moves spirally toward the exit during the process and automatically slides out, achieving continuous, automated operation.
Key Structural Features:
Frame: Hot-dip galvanized steel construction for corrosion resistance.
U-shaped Plates: Suspended between star wheels from the upper frame, allowing fallen hair to drop conveniently into the hair conveyor below, preventing hair accumulation.
Dehairing Drums: Two drums rotating in opposite directions, each directly driven by a gear motor mounted externally on the machine.
Top Enclosure: Sealed with stainless steel.
Doors: Fully manufactured from stainless steel, allowing easy and quick access for internal cleaning.
Spray System: Two independent spray systems—one connected to cold water for machine cleaning, another positioned above connected to hot water for carcass spraying during operation. Smooth interior surfaces on top and walls, combined with the overhead spray system, keep the machine interior clean throughout operation.
Advantages of ZBHT Pig Dehairing Machine
The ZBHT pig dehairing machine delivers industry-leading efficiency by elevating overall hygiene standards while reducing the time required for cleaning and maintenance. Key advantages of this slaughtering equipment include:
Higher Machine Utilization & Superior Dehairing Quality: Achieves both high throughput and excellent hair removal results. The hair removal rate can reach over 95% without damaging the carcass surface.
Enhanced Hygiene & Resource Efficiency: Improves sanitation, saves time, and optimizes energy and water consumption. The machine is designed for easy cleaning and maintenance.
Clean Operation with Fresh Water: Carcasses are processed with fresh water spraying, ensuring a clean and smooth operation.
Easy Maintenance & Time Savings: The machine layout and external bearing lubrication design facilitate quick servicing and minimal downtime.
Reduced Environmental Cost: Only recirculated water is used for hair transport, lowering overall water consumption and environmental impact.
Improved Working Conditions: Constructed with noise-reducing materials to create a better operational environment.
Minimized Vibration & Wear: The rational arrangement of components reduces bearing wear and keeps vibration to a minimum.
ZBHT's Pig Slaughtering Equipment Capabilities
At Qingdao Zhongbang Haotong Machinery Co., Ltd. , we provide comprehensive pig slaughtering equipment solutions for modern abattoirs worldwide. Our pig dehairing machine portfolio includes spiral continuous dehairing machines designed for medium and large-scale processing lines.
Our Dehairing Machine Features:
Spiral Continuous Design: From infeed to outfeed, the process is fully continuous, eliminating batch delays.
Dual Drum Configuration: Two dehairing drums rotating in opposite directions for thorough, consistent hair removal.
Integrated Spray Systems: Hot water carcass spraying and cold water machine cleaning systems built in.
Hair Conveyance System: Removed hair is transported out of the machine via conveyor and can be transferred to temporary storage via compressed air pipeline.
Stainless Steel Construction: Doors and top enclosure manufactured from stainless steel for hygiene and durability.
Note on Consumables: Rubber scraper blades are wear parts and should be replaced promptly when damaged to maintain optimal dehairing performance.
Whether you are establishing a new slaughter line or upgrading existing slaughtering equipment, Qingdao Zhongbang Haotong Machinery Co., Ltd. delivers the efficiency and reliability required for consistent, high-grade pork production.
Why Choose ZBHT as Your Pig Slaughtering Equipment Partner
Proven Process Efficiency: Our pig dehairing equipment achieves over 95% hair removal rates while maintaining continuous, high-speed operation.
Hygienic Engineering: Smooth internal surfaces, stainless steel access doors, and integrated spray systems make cleaning fast and thorough—reducing cross-contamination risks.
Low Maintenance Design: External bearing lubrication, rational component layout, and easy-access panels minimize service time and extend equipment life.
Resource-Conscious Operation: Recirculated water for hair transport and optimized water usage reduce your facility's environmental footprint and operating costs.
Operator-Focused Construction: Noise-reducing materials and automated continuous flow improve workplace conditions and reduce manual handling requirements.
Conclusion: Pig Dehairing Machine is Central to Slaughter Line Efficiency
The journey from live pig to chilled carcass passes through several critical slaughtering equipment stations—none more visible to the end customer than the dehairing stage. A clean, unblemished carcass surface signals quality and care in processing.
The ZBHT spiral pig dehairing machine and related hog dehairing equipment represent a strategic investment in hygiene, throughput, and operational efficiency. By integrating scientifically designed scalding and dehairing systems, processors secure higher yields, better working conditions, and a superior final product.
As global protein demand drives slaughterhouse operators toward ever-greater efficiency, the choice of pig slaughtering equipment partner becomes a defining competitive advantage. Qingdao Zhongbang Haotong Machinery Co., Ltd. provides the engineering excellence to ensure your line performs—cycle after cycle.
