Melrose Coatings Melrose Coatings
The Dip Molding Process

A simplified understanding of the dip molding process can be compared to the art of candle making where you take the wick and dip it in the warm wax.

In the vinyl dipping process we take the mold and carefully heat it. When it reaches the correct temperature the heated metal mold is immersed or "dipped" in a tank of liquid plastisol (PVC). The heated molds are held in the liquid material at the desired depth for a specific period of time to ensure the correct amount of material clings to the mold. When it has been dipped for the correct time the molds are extracted from the liquid and placed back into the oven to be heat cured. After the parts are cured, they are then removed from the oven and allowed to cool before being stripped from the molds. The coated pushrims are left with the coating in place.

Vinyl plastisols are dispersions of special, fine particle size PVC resins in plasticizing liquids. These materials are liquid at room temperature. However, as the compound is heated, fusion takes place and the liquid is converted into a tough, homogenous mass.

The thermoplastic "Plastisol" (PVC) heads the list of dip moldable materials because of it's long history of success, ease of processing, affordability, and prevelence in the dip molding industry. Plastisol is liquid at room temperature and once exposed to a certain elevated temperature, gels and remains a solid. This polymer can offer temperature resistance from -20º to 160º.

Engineering and Prototypes
Not only do we have over 20 years of design experience, but we utilize a sophisticated design and manufacturing CNC tooling fabrication process. Our engineers can design parts to solve most of your problems.

One of the primary benefits of dip molding is related to its inexpensive and accurate prototyping process. With our workshop producing parts daily, we are able to provide prototypes at much lower cost.

Benefits of Dip Molding
  • Low tooling costs...typically a fraction of injection molding
  • Quick and inexpensive prototypes
  • Short lead-times on custom tooling...weeks versus months
  • No internal stress molded into parts
  • Large parts can be made without significant tooling investment

Features include
  • Extreme severe corrosion resistance
  • Sound Deadening
  • Severe Impact resistance
  • Wear resistance
  • Cushion coating, protecting sensitive surfaces
  • Electrical resistance
  • Chemical Resistance (Acids and Alkalis)
  • Soft Feel coating

Secondary Operations
When your application requires something more than a standard part, we can convert, enhance or improve your products.
  • Slicing to remove a portion of the item to create a custom fit or function.
  • Slitting to add a slot or thin opening.
  • Punching to add a hole or customer shape not possible through typical molding processes.
  • Assembly to create products from components, or add a package to your product.

Melrose Coatings Melrose Coatings Melrose Coatings Melrose Coatings Melrose Coatings Melrose Coatings
5671 East Fountain Way / FRESNO / CA 93727
Phone 866 764 5526 / Fax +001 (559) 292 0400