Wenesco Industrial Melters to 450F
WENESCO INDUSTRIAL MELTERS, PUMPS & STIRRERS FOR WAX COMPOUNDS, PLASTICS, ADHESIVES, COSMETICS, PLASTISOL, AND MANY OTHER MATERIALS THAT MELT UNDER 450F (232C)
Fully-insulated cabinets provide cool exteriors-energy savings.
Stainless steel interior for easy cleaning.
Convection heater elements provide even heating all around.
Temperature is controlled with a precision digital thermostat.
Digital display of set point and current temperature in C and F.
High limit setting prevents overheating.
Heated stainless steel drain valve with independent temperature control.
Selection of drain sizes to suit your application.
(Above) Model MU5. A 5-gallon melter shown with optional STR60AA stirrer. This model is widely used for melting plastisols.
(Above) Model MU45. Shown with optional STR600A TEFC Stirrer
(Above) This 20-gallon melter includes a stirrer and pump for transferring machineable wax through a heated hose to molds.
(Above) Model MU20. A 20-gallon melter shown here with optional "wash down" features, which include a stainless steel seamless skin, and a Nema 4 waterproof enclosure fitted with waterproof switches and connectors. The optional STR600A stirrer, as shown, features a 3 phase TEFC motor.
Customized/Special Gas-Fired Melters
We welcome the opportunity to quote on custom Gas-Fired Melters
(Above) MPU60X square melter shown with optional stand.
(Above) Model MPU15R3 rectangular melter.
Multi Melters with interchangeable pots
(Above) Wenesco's MU series Multi-Melters can be used to melt separate batches of product using a main melter with interchangeable pots. The main melter nests the pot just over a convection heater, which is controlled with a remote digital thermostat. The pot and contents are easily removed from the main melter. Our Multi Melters include two stainless steel pots with handles.
(Left) Wenesco's 10-gallon Multi-Melter is combined with a winch to lower a stirrer into the melted compound. The Multi-Melter features quick interchangeable liners, which contain different compounds. Temperature is controlled with an accurate digital thermostat. The stirrer speed is managed with a variable frequency drive. The thermocouple, measuring the melt temperature, is also raised and lowered into the melted compound.
Transfer Pumps and Heated Hose
(Above) MODEL INJ102A-120V
(Above) MODEL INJ102B-240V
Self-contained Transfer Pumps are designed to dispense controlled quantities of hot liquids such as wax, plastisol, and other compounds from any melter equipped with a heated drain. All plumbing is stainless steel.
The heart of our transfer pumps is a positive displacement pump, which dispenses an exact amount of material in a range of 0 to 4 gallons (15 liters) per minute. Flow is controlled with a variable frequency drive. Other pumps are available up to 24 GPM.
The entire system is contained in an insulated heated chamber which is controlled with an accurate, adjustable, digital thermostat. The temperature range of the system is adjustable from 70F to 450F. Actual temperature and set point is displayed in Centigrade and Fahrenheit.
An optional heated hose, as shown, will also be controlled with a built in digital thermostat.
As an option, an electronic timer may be wired into the system to accurately control the dispensing cycle.
(Above) Heated Hoses, ready for connection to the Transfer Pumps, feature a stainless steel braid wrapped around a Teflon core. Stainless swivel fittings permit fast connect-disconnect from the system. Heated hoses are available in many sizes; ask Wenesco for quote.
Stirrers are available with your choice of conventional propellers or side wiping propellers that clean the melter's wall during the heat cycle.. The entire stirrer is easily removed from the melter for cleaning or service.
Stirrers for larger melters and higher torque are quoted to requirements. Variable speed control is available for most stirrers.
Stirrers for over 70000 cps quoted, Speed Control optional if 3-phase power is available. Other operating voltages are available. Air motors with speed control can be specified.
Viscosity Rating of Various Materials
Custom Made Melters
Some of the many options available to customize standard melters include:
Washdown housing and watertight control panels of 304 stainless steel.
Special adjustable stands and supports.
Cooling coils for fast cooling of heated compounds.
Extra smart programmable temperature controls.
Manifolds with nozzles to dispense multiple streams of heated material.
Light tower with process timers to view status from across room.
316 Stainless construction.
Gas-fired melters with auto-pilot light for natural or LP gas, with digital temperature control.
(Left) This custom made 250-gallon melter is made with a long sloping funnel leading to a large, heated drain valve. The melter is controlled with a remote digital controller at 400F. A stirrer maintains the consistency of a special wax compound during the melt cycle. This melter will be mounted later onto a stand, to allow room for a container under the drain..
UNIQUE REQUIREMENTS? Wenesco specializes in custom designs according to your specifications. Ask your sales representative for details.
Processing Guidelines & Information
HOT MELT PLASTISOLS
When properly compounded, Hot Melt Vinyl Plastisols have sufficient heat stability and flow characteristics to enable the processor to pour or inject the molten compound into a cold or room temperature mold.
At the typical processing temperatures of 330F (166C) to 360F (182C), these compounds exhibit low enough viscosity to allow the plastisol to flow at those elevated temperatures.
When cool, the hot melt plastisol is transformed into a soft rubbery substance.
Vinyl is an excellent thermal insulator. Therefore, it is necessary to continually agitate the compound in the heated vessel. Slow positive agitation, which wipes the surface vessel, will help prevent localized degradation.
It is necessary to keep heat distribution even and below 400F (204C).
The plastisol, as supplied, is a low viscosity liquid. Conversion is accomplished by heating the compound until the polyvinyl chloride resin is solvated by the liquid plasticizers, then further heated to a high enough temperature for proper flow and fusion.
Minimum temperature for fusion is about 330F (166C). Minimum temperatures for molten flow depend upon the compound, its hardness, and the process technique, but could vary from 330F (166C) upward.
Compounds of any color, Including clear, can be utilized. Hardness ranging from 8 Shore A (fish lures) to 30 Shore A (casting molds) can be utilized.
The plasticizers in vinyl are also plasticizers for other plastics and many materials used in paints and lacquers. Prolonged contact, with the vinyl part, can result in plasticizer migration.
Melter temperatures should be set to at least 400 F (204 C). Some users
prefer temperature settings as high as 450F (232C), but care must be
exercised as temperatures are increased above 400F (204C).
Uniform heating and reasonably accurate temperature control is important.
A setting of 400F (204C) is used to bring the hot melt to 360F (182C) before pouring.
As the hot melt warms in the vessel, it will begin to phase from a liquid to a solid at around 250F. At this point, it can be visually described as a lump surrounded by liquid. It will remain solid until the temperature reaches approximately 330F (166C) This is normal.
After the plastisol reaches the approximate 330F (166C) temperature, the solid material will begin to phase back into a liquid state.
The hot melt should be stirred during the heating process to assure more uniform heating of the mass. Additionally, the stirring of the mass will help break up the solid phase quicker.
Excessive heat will cause degradation which is evidenced by discoloration, Continued overheating may liberate hydrogen chloride, a corrosive, noxious gas.
Wenesco stainless Melters are suitable for processing paraffin, animal fats, hydrogenated oils, or any situation where solids and liquids are combined and blended at room temperature, with heat subsequently applied to melt the solids.
Our melters are frequently used for heating and dispensing glue, adhesives, pitch, and tar, Vessels constructed from carbon steel, while cost effective, are porous, and therefore reactive. As a result, with applications where contamination may be an issue, heated stainless steel processing tanks are recommended.
Other applications include waxes for textiles, leather, packagting, metal molding, casting and cosmetics.
Machineable waxes, pharmaceutical waxes and automotive waxes are also successfully processed.
Looking for a Plastisol source? Chemonics Corp www.chemionics.com
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