Used Comet Plastic Equipment Plastics Auxiliary Equipment for Sale
2 results
Item #7114
Comet Material Dryer w/ Drying Hopper
USA
Item #7113
Comet STM Mold Temperature Controller
USA
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About Comet Plastic Equipment
Who Comet isComet Plastic Equipment is an American manufacturer of auxiliary equipment for plastics processors, based in Miami, Florida. The company builds a broad line of machinery that sits beside the molding or extrusion machine rather than in it: drying, conveying, blending, granulating, mold temperature control and mold dehumidification. For a used-equipment buyer, that means most Comet machines are self-contained skid or cabinet units that can be moved, re-piped and re-wired into an existing cell without major plant work.
What they are known forComet is best known for resin drying and material handling. The drying range runs from small compressed-air dryers (3DX, 3DX-M micro units with 2, 4 and 7 litre hoppers) through hot-air hopper dryers (CDH, CHD-U, with capacities from roughly 25 to 1,850 lbs) up to honeycomb-matrix dehumidifying dryers and dryer/hopper combos in the CD-H, CDD and CCD series for hygroscopic resins such as PA, PC, PBT, PET and nylon. On the temperature-control side, Comet builds the CTM-W water temperature controller (230 or 460 V, 40–250 °F, ±1 °F accuracy, 6–36 kW) and the CTM-O oil temperature controller in 350, 375 and 450 °F versions. Conveying and blending products include CAL-U and CAL-UG hopper loaders, CHR-U filterless receivers, VL venturi loaders, proportioning valves and volumetric colour feeders; granulators and shredders cover the CG, CSS-SS, CSL-SS and CSX-DS ranges.
Models buyers search forDryers: 3DX, 3DX-M, CCAD-U, CD-H, CDD, CCD, CHD-U and CDH series (the CDH line runs hopper sizes 15 through 600 with 33–1,320 lb capacity and 1.6–10 kW heating). Temperature controllers: CTM-W and CTM-O. Loaders and conveying: CAL-U, CAL-UG, CAL-UGP, CAL-UG124, CHR-U, VL. Granulators: CG-16N/20N/24T, CG-23/30/36, CG-50, CG-SP, CG-XSP. Blow molding: CAC compressed air chiller and BMB blow molding booster.
What to check on a used Comet machineOn dryers, check the process heater and blower, the desiccant or honeycomb rotor condition on CD-H/CDD/CCD units, door and lid seals, the 7-day timer and process controller, and the material clean-out door on CHD-80U and larger. Confirm the hopper capacity and whether the unit is a stand-alone floor model or machine-mounted, since base type changes with size (CHD-450U and below use a stainless-lined aluminium base, CHD-600U–750U an aluminium magnetic base, CHD-900U and above a manual butterfly valve and floor stand). On CTM-W and CTM-O controllers, inspect the pump, heaters, low-watt-density element, over-temperature switch, piping for scale or corrosion, and confirm the voltage — 230 or 460 V on CTM-W — matches your supply. Ask for the controller type and any RS485/communications option.
Service and partsComet uses non-proprietary controllers on several units and Siemens finger-safe electricals, which helps with third-party repair, but verify availability of model-specific parts such as rotors, heaters and pumps before committing. Original manuals, wiring diagrams and the option list (magnetic filter, water manifold, flowmeter, hot-air recycler, maintenance ladder) are worth requesting, as options affect setup and value. Model and serial plates should be photographed, and out-of-production items are listed by the maker, so check current support status for older series.
Meadoworks is your trusted source for used Comet Plastic Equipment equipment. As third-generation industrial equipment dealers and AMEA-certified appraisers with over 50 years of experience, we offer quality-inspected Comet Plastic Equipment machines at competitive prices. Browse the 2 used Comet Plastic Equipment machines listed above, or call 800-323-0307 for equipment not yet listed.
Every machine includes detailed specifications and high-resolution photos, and inspection visits are available for most equipment. We ship worldwide with experienced rigging partners and offer financing for qualified buyers. Have Comet Plastic Equipment equipment to sell? Get a free valuation or contact our team.
Used Comet Plastic Equipment Equipment by Type
From our own listings: machines for sale now and machines Meadoworks has sold.
| Type | For sale now | Sold |
|---|---|---|
| Used Comet Plastic Equipment Resin Dryers | 1 | 0 |
| Used Comet Plastic Equipment Thermolators & Temperature Controllers | 1 | 0 |
| All Comet Plastic Equipment equipment | 2 | 0 |
Popular Comet Plastic Equipment Models
Comet Plastic Equipment CTM-W, Comet Plastic Equipment CTM-O, Comet Plastic Equipment 3DX, Comet Plastic Equipment 3DX-M, Comet Plastic Equipment CD-H, Comet Plastic Equipment CDD, Comet Plastic Equipment CCD, Comet Plastic Equipment CHD-U, Comet Plastic Equipment CDH.
Looking for a specific model? Call 800-323-0307 — we often have unlisted Comet Plastic Equipment machines coming in from plant closures.
Frequently Asked Questions
Where is Comet Plastic Equipment made and based?
Comet Plastic Equipment is a US manufacturer based in Miami, Florida. It builds auxiliary plastics machinery — dryers, temperature controllers, loaders, granulators and material handling — for injection molding, extrusion and blow molding processors.
What is the difference between the Comet CTM-W and CTM-O temperature controllers?
The CTM-W is a water temperature controller rated 40–250 °F with ±1 °F accuracy, available in 230 or 460 V and 6, 9, 12, 24 and 36 kW models. The CTM-O is an oil temperature controller offered in standard and high-temperature versions at 350, 375 and 450 °F.
Which Comet dryer series should I look for when buying used?
The series depends on the resin. Compressed-air dryers (3DX, 3DX-M) suit small to mid-volume throughputs; hot-air hopper dryers (CDH, CHD-U) remove surface moisture from non-hygroscopic resins; honeycomb-matrix dehumidifying dryers (CD-H, CDD, CCD) are used for hygroscopic resins such as PA, PC, PBT, PET and nylon.
What should I inspect on a used Comet hopper dryer?
Check the heater and blower, the rotor or desiccant condition on dehumidifying models, lid and door seals, the 7-day timer and process controller, and the material clean-out door on CHD-80U and larger. Also confirm hopper capacity and whether the unit uses a floor stand, magnetic base or machine-mount base, because that changes with model size.
Are parts and service available for older Comet equipment?
Comet lists some older products as out of production, so check support status for the specific series before buying. Several units use non-proprietary controllers and Siemens finger-safe electricals, which can simplify repair, but model-specific parts such as rotors, heaters and pumps should be confirmed with the supplier.
Does the STM temperature controller appear in Comet's current catalogue?
Comet's published temperature controller lines are the CTM-W water series and CTM-O oil series. The STM model appears on used listings, so verify its voltage, temperature range and controller type from the machine's nameplate and manual before purchase rather than assuming it matches a current series.
What kinds of used Comet Plastic Equipment equipment does Meadoworks carry?
By our own listings: resin dryers (1 for sale now); thermolators & temperature controllers (1 for sale now).
Related Resources
Comet Plastic Equipment Specialties
Looking for Specific Comet Plastic Equipment Equipment?
Can't find what you need? Contact our team with your requirements. We source equipment from plant closures and facilities across North America and can often locate specific machines.
