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Clean mold cavities and vents are a major concern for plastic part manufacturers in maintaining today’s high quality standards. The build-up of unwanted surface residues from either the resin additive off-gases or the use of mold releases can create various problems, ranging from product release (“knock out”) to inferior product quality and possible damage to tools. Flash, burn and short shots on the product caused by clogged vents also creates challenges for manufacturers.

Traditional cleaning methods involve tedious and ineffective manual processes using chemicals and hand tools. Cold Jet’s alternative cleaning process provides a non-abrasive and environmentally responsible method that allows molds and product to be cleaned in a fraction of the time, allowing increased cycles between preventive maintenance. In addition, molds can be cleaned at operating temperature and in-place, without water, chemicals or creation of secondary waste.

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Cold Jet dry ice blasting removes the waxy, paraffin build-up that can lead to blemishes (orange peel effect) on the bottles while the molds are hot and on-line.

The manufacturing of a polyurethane foam product used in sound dampening for autos and vans leaves the manufacturer with molds coated with an isocyanate/wax mold release. Mold release build-up eventually causes "knock out" problems, and, in extreme cases, the wax release agent becomes encased in the polyurethane foam product, making the product unusable.

With Cold Jet dry ice blasting, molds are cleaned in only 15 to 20 minutes and the cavities are more thoroughly cleaned = 20 times as many molds can be cleaned with dry ice blasting versus conventional methods. Production up time is increased by 100 to 120 hours and maintenance crews are now free to attend to other duties.

Cold Jet dry ice blasting can clean entire blow and injection mold cavities completely and effectively. Many leading blow molding bottle manufacturers have discovered that dry ice blasting systems cut their daily mold cleaning time by about 80% simply by cleaning molds hot and in place. Today, even the back 1/3 of the blow-mold surface and the entire deep-cavity injection molds used to make test-tube shaped slugs are cleaned by dry ice blasting whereas it used to have to be cleaned by hand.

Cleaning with Cold Jet Dry Ice Blasting in the Plastics Industry Will:

  • Improve product quality
  • Reduce scrap
  • Reduce production downtime
  • Reduce cleaning time and labor costs
  • Clean in-place, no disassembly required
  • Be non-abrasive, with no damage to molds
  • Eliminate secondary waste
  • Provide an environmentally responsible clean

Proven Plastics Applications for Cold Jet Dry Ice Blasting Include:

General Mold and Tool Cleaning

Product Finishing