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What Is Cryogenic Deburring & Deflashing?


Cryogenic deburring & deflashing is the process by which excess material on plastic or rubber parts is removed using a combination of extreme low temperature and inert impact materials introduced at high velocity to knock off burrs and flashing while leaving the original form intact.




How Does The Process Work.


Parts to be deburred or deflashed are placed in batches in a rotating stainless steel basket, which is spun at a pre-designated speed inside a specially designed insulated chamber. High purity, moisture free liquid nitrogen is introduced, lowering the part temperature to a pre-determined point where excess material becomes brittle and naturally and easily separates from the main body of the part to which it is attached. Inert plastic media is blown into the spinning, chilled chamber, and forces the brittle burrs and flashing to be fractured away from the part, efficiently separating unwanted excess materials. The combination of low temperature, high-speed rotation and inert, shot-blasted plastic media acting against the already brittle burrs and flash quickly and efficiently separate unwanted excess material from the part.




How Is Quality Controlled?


High quality and uniform finish throughout a batch and between batches, relies on the proper setting and monitoring of the variables involved: Temperature setting. Speed of basket rotation. Size, shape and type of plastic media. Velocity of introduction of plastic media. Pre-soack, soak and post process times. NJ Cryogenics uses predetermined an customized computer recipes spcific to your part configuration and material type. Custom process recipes are stored for future use for repeat customers. Our processes are documented and audited to our parent company's ISO 900 registration.




What Advantages Are There To Using Cryogenics For Removal Of Burrs & Flash?


In general cryogenics as a process produces a consistent, uniformly higher-quality, finished product faster and with less expense then by hand-finishing. In addition, cryogenics is able to remove burrs and flash from internal holes, cross-holes, blind holes, small slots and crevices and other areas that would be either difficult or impossible to do manually. Cryogenics offers:

  • More reliable, repeatable and consistent results than hand finishing.
  • Uniform quality throughout a batch and between seperately run batches.
  • Reduced scrap due to handling and human error.
  • Faster turnaround.
  • The ability to remove unwanted material from areas difficult or impossible to remove by hand.




What Benefits Can I Get From Using This Process?


As a client you can expect:

  • Faster turnaround.
  • Lower cost as compared to hand finishing.
  • Uniform quality with little to no rejects.
  • Dedicated service.
  • Same day turnaround in most cases.
  • Pick up and delivery service for local customers.
  • Drop shipment service.
  • Packaging services.




What Materials Can The Process Accommodate?


Plastics

ABS (Acrylonitrile Butadiene Styrene)

PMMA (Acrylic/ Polymethyl-Methacrylate)

CPVC-FR (Boltaron/Corzan)

PBI (Polybenzimidazole)
CPVC (Chlorinated Poly Vinyl Chloride)

Delrin (Acetal)

PET-P (Polyethylene Terephthalate Polyester)

Glass Filled Epoxy (G-10)

Kapton (Polyimide Film)

PCTFE (Kel-F Polychlorotrifluoroethylene)

PVDF (Polyvinylidene Fluoride)

Lexan (Polycarbonate)

Lucite (Polymethyl-Methacrylate - PMMA)

Nylon — Polyamide, filled & unfilled

PEEK — Polyether Ether Ketone

PC (Polycarbonate)

PE (Polyethylene, UHMWPE, UHMW, LDPE, HDPE, PETG)

PP (Polypropylene, PPFR, CP-7D)

PS (Polystyrene)

PSU (Polysulfide)

PU (Polyurethane)

PVC (Polyvinyl Chloride)

Rexolite (Crosslinked Polystyrene)

Ryton (Polyphenylene Sulfide - PPS)

ESD Acetal

PTFE (Teflon — Polytetrafluoroethylene)

Torlon (Polyamide-Imide - PAI)

Ultem (Polyetherimide - PEI)

Vespel (SP polyimide)

Rubber

Neoprene Rubber

Buna-N Rubber (Nitrile)

Silicone Rubber (Polysiloxane)

Viton Rubber (FKM)

Vinyl Rubber (polyvinyl chloride-PVC)

Butyl Rubber (isobutylene isoprene)

Latex-Free TPE Rubber




Is The Process Safe?


Because the process uses a non-abrasive plastic media it does not alter the shape or geometry of the piece. Careful monitoring of the process results in no alteration of part design or functionality. Although it is rare (less than .01%) part configuration that may be subject to damage as a result of tumbling can be susceptible to damage at extremely low temperatures. For this reason NJ Cryogenics will advise its customers of the potential for damage of each job quoted.





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