Automatic Crate Washer Machine

Heavy-Duty Automatic Crate Washer Machine for High-Volume Food Processing

Relying on manual labor for washing turnover containers creates severe bottlenecks, inconsistent hygiene levels, and excessive water waste. The ACW-2000 industrial automatic crate washer is engineered to standardize the sanitation of plastic crates, metal baskets, foldable trays, and frozen food containers in high-throughput facilities. By integrating a four-stage process—pre-washing, heated main washing, fresh water rinsing, and high-velocity drying—this continuous tunnel washer completely eradicates protein residues, heavy fats, and field soil. Capable of replacing 20 to 30 manual workers, the system guarantees stable throughput and verified microbial reduction across varied shift lengths.

• Throughput Capacity: Continuously processes 1,500 to 2,000 crates per hour, governed by a variable frequency drive to match upstream production pacing.
• Modular Architecture: Configurable washing tunnel lengths, track widths, and spray pressure zones accommodate specific container geometries without requiring specialized tooling.
• Resource Efficiency: Integrated wedge-wire filtration and active water recirculation networks reduce municipal water consumption by up to 60% compared to static hose washing.

Technical Specifications of the ACW-2000 Washing Tunnel

Targeted Contamination Removal and Operational Advantages

A single generic washing profile is insufficient for a facility handling mixed agricultural or meat products. We engineered the ACW-2000 with a strict modular design philosophy, allowing facility engineers to dictate the mechanical parameters based on the primary soil load.

• Grease and Protein Saponification: Facilities integrating the washer into heavy-duty poultry slaughtering equipment lines utilize the high-temperature alkaline dosing stage. The 85°C main wash melts polymerized chicken fats, while alkaline detergents break down protein bonds on the plastic webbing.
• Heavy Soil and Sand Extraction: For agricultural cooperatives handling root vegetables, the pre-wash zone is extended and fitted with high-volume, low-pressure flooding nozzles to physically dislodge clods of clay before the baskets enter the chemical wash zone.
• Dynamic Dimension Adjustment: Operators can manually adjust the upper and lateral SUS304 guide rails via external handwheels. This allows seamless transitions between 400mm deep meat crates and shallow 150mm pastry trays within a three-minute changeover window.
• Continuous Debris Purging: Instead of operators stopping the machine to clean clogged pump intakes, rotary drum filters automatically extract solid debris (bone fragments, leaves, labels) from the wash tanks and deposit them into an external collection bin.

Internal Fluid Dynamics and 4-Stage Process Flow

Consistent sanitation requires sustained hydraulic shear force and precise temperature regulation. The transport mechanism consists of a rugged SUS304 dual-pitch roller chain that carries inverted crates through four highly controlled atmospheric zones.

Initially, the pre-wash stage utilizes recycled, ambient-temperature rinse water to flush away bulk solids. The crates then enter the primary sanitation zone. Here, a dedicated 7.5 kW centrifugal pump forces heated chemical solutions through an array of 360-degree adjustable stainless steel nozzles. The pump generates 4.5 bar of localized pressure, ensuring the fluid penetrates the blind corners and reinforced ribbing of structural foam crates. The temperature is continuously monitored by PT100 sensors and maintained by an automated steam proportioning valve or internal electric immersion heaters.

Following the chemical wash, the rinsing zone applies municipal-grade fresh water to neutralize any remaining detergent. Finally, the containers pass beneath the drying module. Dual 5.5 kW high-pressure side-channel blowers generate a sheer curtain of ambient air, mechanically stripping water droplets from the crate surfaces so they can be immediately returned to the processing floor for packing.

Integration Capabilities for High-Yield Central Processing

Deploying a machine that handles 2,000 crates per hour fundamentally shifts facility logistics. To prevent bottlenecking at the outfeed, the ACW-2000 is engineered to interface directly with automated crate stackers and destackers. The Siemens PLC control panel coordinates via standard digital I/O with upstream conveyor proximity sensors. If the outfeed accumulation table is full, the VFD automatically halts the drive chain while keeping the pumps running on bypass, preventing unwashed crates from resting inside the chemical zone.

Sanitary Construction and Global Compliance

Equipment deployed in damp, highly corrosive environments must possess exceptional metallurgical integrity. The entire structural frame and internal reservoirs are fabricated from bead-blasted SUS304 stainless steel. All internal welding seams are fully TIG welded and passivated to eliminate micro-crevices where Listeria or Salmonella colonies could anchor. For maintenance protocols, large hermetically sealed side doors with compression latches allow operators unrestricted access to the nozzle manifolds and pump screens. Every unit ships with comprehensive CE documentation, electrical schematics, and factory acceptance testing (FAT) records to satisfy aggressive third-party hygiene audits.