Spray washers are a type of parts cleaning system that moves medium to large sized parts through a water-spraying industrial washer. It is one of the most common types of washers, and employs high pressure nozzles that shoot warm water and aqueous cleaning solution. The nozzles are able to clean away heavy or difficult to remove soils, grease, oil, coolants, buffing compounds, abrasive dust, blast debris, paint, chips and other contaminants that do not come off easily.
Spray washers are composed of a conveyor system that flows through a cabinet. The cabinet houses a cleaning tank and several nozzles that are angled at different positions in order to clean the whole surface of every part. These cleaning systems are designed to wash newly machined products in medium to large volumes, such as industrial drums, appliances and automotive parts. They are batch or inline systems, often integrated with other industrial processes like metal stamping and CNC machining. They are powered by gas or electricity, and the nozzle sprays water at the parts by high pressure water pumps.
Spray washers are almost always fully automated and operate by a CNC system (computer numeric controlled) or PC software. Loading is often done by pick-and-place robotic arms or a conveyor that transfers the parts from a manufacturing operation to the spray washer, which is usually one of the last steps in inline processing. After the parts have been loaded, they are taken through a wash, rinse, blow and dry cycle. The nozzles spray warm water and water-based solutions, never flammable mineral spirits, which may start a fire or explosion if shot out of a nozzle. The solution is usually set at a temperature of 130º to 190º F, and the spray pressure reaches anywhere from 40 to 60 PSI in order to ensure all grime and contaminants are cleaned from the part surface. The drying system can consist of either heated air or a simple air blower gun or process dryer, which doesn't use heat. There are many specifications and options when it comes to spray washers, including spray pressure, flow rate, heater power, wash tank capacity, power source type and loading method. Loading methods include front, top or continuous (conveyor belt); spray washers can be built to allow any of the three loading configurations.
Spray Washers - Proceco Ltd.
The most popular metal parts washers these days are the cabinet-style washers. Its operation is smoother than other options, such as rotary drum parts washers, immersion parts washers, and agitating parts washers.
Their cleaning action involves heated, aqueous spray from high-speed jets that disburse and remove metals parts within an enclosed cabinet; primarily they are aqueous parts washers. Cabinet-style washers' unique design allows users to handle and clean heavy and large contaminated objects easily. An operator can access the cabinet interiors through a hinged door, and then load the parts onto the turntable directly and efficiently. The turntable grips the metal pieces at one place, while rotating during the cleaning process.
Cabinet-style industrial parts washers are commonly installed with fixed or retractable turntables. It is this further division that confuses buyers. In this blog, we discuss advantages and disadvantages of each design, giving you insight that will help to make a decision when purchasing this type of parts washer.
Fixed Turntable Design
In fixed turntable designs, a stationary-hence the name fixed-turntable is installed at the center of the wash cabinet. Specially designed V-Notched door, also known as clamshell style, expedites placement of metal parts on the table that is fixed with overhead cranes and jib booms to facilitate smoother loading.
Retracting Turntable Design
In retracting turntable parts washers, also called as swing-out turntables, a turntable is installed into the door. When you open the cabinet or door, the turntable swings outwards with the door, making it easy for operator to load and unload.
Capacity of Each Design
The retractable turntable design can manage load up to 20,000 pounds, starting from 10,000 pounds. Whereas the fixed turntable designs can wash loads up to 65,000 pounds, giving it the upper hand over retractable designs.
Other Design Features
In the retractable turntable washers, the retractable door supports the entire weight of the table and the hinges manage all loads, and that is why it cannot wash heavier loads. Moreover, operators must be cautious, as heavy parts move with the opening and closing of the door.
The fixed turntable design provides better operational safety. The turntable holds all the weight of the metal parts, promoting safety and precision while loading and unloading. The door moves freely, without the extra weight and resistance, which prevents possible injury to operator.