At high speed and in hygienic conditions, empty aluminum cans, PET bottles and glass containers have to be carried from pallet storage to areas for rinsing, filling and packaging. This must be done without deformation, tumbling or contamination. An automatic depalletizing machine may be the answer.
Due to higher throughput requirements, the first step of the packaging line often determines if the container arrives at the filling equipment intact. Depalletizing systems remove containers from pallet loads and move them via conveyor systems to a system that rinses and fills them. If integrated properly with the rest of the line, they stabilize container movement and reduce the risk of contamination before production.
Best Manufacturing Practices
Current good manufacturing practices covered by the U.S. Food and Drug Administration include sanitary operations, plant equipment and production controls to prevent contamination during food processing. Machinery design and operations provide two key elements of contamination control practices in beverage manufacturing environments.
Why Container Damage Often Starts at the Pallet
Many problems start before the container reaches the filler. When palletized loads are moved, any damaged or displaced pallets can lead to unstable layers. Differences in the lift levels can cause denting or tipping. According to the Packaging Machinery Manufacturers Institute, container damage can be caused by:
- Pallet misalignment or shifted container layers.
- Debris from slip sheets or pallet materials.
- Uneven transfer from pallets to conveyors.
- Pressure differences between aluminum, PET and glass containers.
As depalletizing is typically the first mechanical transfer in a packaging line, careful equipment design can reduce these issues.
Layer Handling Improves Container Stability
The best way to prevent damage at high speeds is to handle the containers layer-wise rather than individually. That way, the pressure distribution stabilizes and reduces the friction between them.
According to Ska Fabricating, a depalletizer is used in beverage and consumer packaged goods manufacturing to remove products or containers from pallets and place them on conveyors or production lines. This eases rinsing and filling, while maintaining consistent container orientation.
Layer transfer systems are commonly used in beverage plants, often in conjunction with conveyor and rinser systems when depalletizing aluminum cans, PET bottles and glass bottles. This machinery must manage high throughput rates with minimal stress on the containers early in the packaging process.
Stable Container Transfer Prevents Downstream Disruptions
Containers are aligned and oriented as they are moved from layers of pallets into conveyors feeding rinsers and fillers.
To solve misalignment problems, A-B-C Packaging Machine Corp. recommends equipment designed to maintain a controlled flow of containers. It states that the Model 108 depalletizer provides an uninterrupted flow of containers to the processing line, maintaining a steady flow during high-speed packaging operations.
Keeping containers moving in consistent flows reduces dented cans, tipped bottles and production loss.
Sanitation and Equipment Design Work Together
Preventing contamination is about more than cleaning. Equipment design can directly affect the ability to clean and sanitize.
The FDA stresses that cleaning and sanitizing food-contact surfaces is critical in controlling contamination. A dirty or poorly maintained surface promotes impurities. Proper equipment layouts and the ability to remove built-up debris determine sanitation effectiveness.
Depalletizers, when combined with a slip-sheet removal and pallet centering system, may help reduce debris from entering production. The Ferrum Group designs its beverage depalletizing machines for high-speed production systems, supporting container handling and separating palletized materials from receptacles before they are fed into the fill line.
These systems also help keep production areas clean and protect containers during transportation.
Automation Tools Offer High Throughput While Retaining Control
Modern beverage facilities require an optimal trade-off between protecting containers from mechanical damage and production speed, which is greatly helped by automation.
According to BW Integrated Systems, conventional depalletizers remove containers one layer at a time and carefully push them onto conveyor belts, leading to the next step in the packaging process. They also hold containers in place during high-speed operations.
Automated depalletizing lines may include conveyors, inspection systems, rinsers and other ancillary equipment to maintain container flow while protecting the packaging.
Depalletizing Considerations for Beverage Co-Packers
Beverage co-packers often will co-pack for more than one container type within the same plant, such as beer in aluminum cans, tea and juice in PET bottles, and specialty drinks in glass.
Because there are so many kinds, flexible depalletizing systems are common now. One type of depalletizer may only work with one type of container. Others can work with glass, plastic and metal containers, switching between formats without sacrificing throughput.
Since co-packers may produce multiple brands, this allows for streamlined production schedules and minimizes container damage during changeovers.
Features of Modern High-Speed Depalletizers
Manufacturers considering an automatic depalletizer machine consider various operational factors:
- Layer handling capability: Allow container transfer with little mechanical impact
- Material suitability: Suitable for aluminum, polyethylene terephthalate and glass
- Order of operations: Prevents pallet pieces from contaminating product after removal of the slip-sheet
- Changeover flexibility: Enables faster conversion to a different container format
- System integration: Eases the flow of containers from filler to packer
These and other features allow beverage facilities to package products at high speeds while also protecting containers.
Frequently Asked Questions
Here are some common questions manufacturers have about using depalletizers to help prevent damage and contamination.
What is the function of a beverage depalletizer in production?
A depalletizer removes containers from the product layer on the pallet, placing them on a conveyor for rinsing, filling and packaging.
Why is container protection important before filling?
Dented or misaligned containers can cause problems downstream in the filling and sealing processes. Damage prevention during depalletizing can eliminate these problems and improve packaging efficiency.
How do depalletizers help?
Some depalletizing systems also remove slip sheets and other pallet debris before the containers are rinsed, preventing foreign material from entering the production line.
When should beverage facilities update their depalletizing equipment?
Facilities will typically update depalletizers when production speeds increase or when new container styles or sanitation regulations are introduced.
Protecting Containers in High-Speed Beverage Production
Preventive measures to prevent damage and contamination are taken at the beginning of the packaging process. Depalletizing systems stabilize container handling by consistently removing debris-free pallets for downstream processing.
Modern, high-volume beverage manufacturers can employ depalletizer equipment with conveyors and sanitation systems, which can achieve high throughput and maintain container integrity in harsh environments.