Molded Products

Insert Injection Molding

Ron-Vik has years of experience in manufacturing insert injection molded filters for our proprietary in line strainers. We have expanded our insert injection molding capabilities to allow us to design and manufacture a wide range of insert molded custom products. Most of these products combine cylinders or flat blanks with thermoplastics or thermoplastic elastomers (TPE's)(as shown in the picture). These products offer significant advantages over metal on mesh, welded or soldered designs. These components are made by taking a prefabricated mesh form and putting it into an injection mold. The mold closes around the mesh and plastic is injected to create a gasket and/or a support cage. Mesh sizes range from 1 micron openings up to 2000 micron openings. Our experienced engineering staff will assist you in the design of a component that will achieve your desired results.

Common Materials
Support cage/gasket materials
• Nylon: most varieties including filled
• Polypropylene: homopolymers and copolymers including filled
• Polyethylene: high density and low density
• Polyester: most varieties including filled
• Acetal: homopolymers and copolymers including filled
• Santoprene® in most durometers
• Geolast® in most durometers
• Others: contact us if you need a material that is not listed

Filter Materials
• Stainless steel: most alloys, 2 to 2000 micron
• Other metals: most alloys including epoxy and Teflon coated
• Nylon from 1 to 2000 micron
• Polyester from 1 to 2000 micron
• Polypropylene from 75 to 2000 micron

Cylinders and Cones
Cylinders and cones are ideal for applications requiring a maximum amount of surface area. Parts can be designed with the flow going from either inside/out or outside/in. Basic design considerations should include:
• Maintain as consistent cage/gasket cross section as possible
• Keep above cross sections over .050" wherever possible
• Incorporate at least one, preferably two longitudinal ribs to cover seams in mesh.
• Add circumferential ribs as necessary for strength.
• To allow for easy core pulls, minimize undercuts on ID of part.
• Male threads are best. Use female threads only if absolutely necessary.
• Diameters between .250" to 4" and lengths from .500" to 8" are best.

Blanks
Both flat and formed blanks are easily insert injection molded. These are ideal designs where space is at a premium. Basic design considerations should include:
• Maintain as consistent cage/gasket cross section as possible.
• Keep above cross sections over .050" wherever possible.
• For domed parts allow for a flat shut-off area on the ID of the cage/gasket.
• To allow for easy core pulls, minimize undercuts on ID of part.
• Male threads are best. Use female threads only if absolutely necessary.
• Keep part size under 18" square

Pot Molding

For over 50 years Ron-Vik has been the leader in PVC pot molded filters and strainers. Our pot molding capability combines the efficient filtration of wire mesh with economical PVC flanges and/or gaskets to provide a wide array of filtration and straining products. We can mold cylinders and formed blanks with either rigid or flexible gaskets/flanges. PVC is available in a wide variety of colors and durometers range from 40 Shore A to 60 Shore D.

Materials
PVC: Black vinyl plastisol (PVC) in a 70 durometer shore A is used to manufacture bases that are flexible yet durable and economical. Note: If the install ation puts this base in direct contact with any styrene based components please advise your customer service representative as our standard material is not recommended.

Mesh Materials
Stainless Steel type 304: The basic stainless all oy (18% chrome, 8% nickel) and the most extensively used to weave wire cloth. It has excellent corrosion resistance whi ch is satisfactory for most applications. Where no type is specified, it is assumed that type 304 is acceptable.

Stainless Steel type 316: The same characteristics as type 304 with an additional 2% molybdenum to provide increased corrosion resistance to salts and acids. In additional it has increased strength at high temperatures.

Brass: Standard brass (copper 65%, zinc 35%) has high strength and ductility for severe cold with a mild corrosion resistance.

Monel® alloy 400: A high nickel copper alloy which is one of the most widely used alloys for corrosion resistance. It has the strength of a mild steel and will not corrode in a great many solutions found in industrial applications.

Cylinders and Cones
Pot molded cylinders and cones are ideal for applications where a maximum amount of surface area is required. Gaskets and flanges can be either rigid or flexible and the two ends of the parts do not have to be the same durometer. Basic design considerations should include:
• Maintain PVC thicknesses of at least .080"
• Minimize undercuts on ID and OD of part.
• Locate screen to ID of flange/gasket wherever possible.
• Maintain a flat PVC profile on the top of the flange/gasket surface when possible
• Allow for some wicking of PVC into the mesh, especially fine mesh.
• Diameters between .250" and 12" are best.
• Part length should be kept under 18"
• Advise your Ron-Vik engineer if the part will be in contact with any styrene based plastics.

Stampings
Pot molded stampings are space efficient filters and strainers. They can be anything between round and square, with any multitude of screen profiles. Basic design considerations should include:
• Maintain PVC thicknesses of at least .080"
• Minimize undercuts on ID and OD of part.
• Locate screen to ID or OD of flange/gasket wherever possible.
• Screen must exit the flange/gasket from the top. It cannot bisect the PVC.
• Screen should protrude at least .250" above the PVC.
• Maintain a flat PVC profile on the top of the flange/gasket surface when possible
• Allow for some wicking of PVC into the mesh, especially fine mesh
• Part sizes under 12" square are best.
• Advise your Ron-Vik engineer if the part will be in contact with any styrene based plastics.