Composite plastic sanitary fitting
AssigneeFluoroware, Inc.
InventorsJames C. Linder, Jeffrey J. McKenzie
Life of this patent
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Abstract
A composite sanitary fitting in which an inner body portion is secured within a overmolded stiffening sleeve which provides strength and rigidity to the fitting. The main body is comprised of a plastic such as PFA and the outer stiffening sleeve is comprised of a more rigid durable plastic such as PEEK. The main body portion has a flange portion which at the connecting end. The stiffening sleeve has an U-shaped portion extends around three sides of the flange locking the sleeve on the body portion.
Claims9
A method of manufacturing a composite fitting comprising the steps of:
- 1) injection molding a body portion comprising of PFA having a connecting end with a flange portion at said connecting end;
- 2) baking said body portion at an elevated temperature whereby said body portion shrinks;
- 3) preloading the body portion in a mold at an interface at the connecting end;
- and
- 4) injecting molten PEEK into a mold cavity extending around the flange portion thereby forming a sleeve around the body portion.
A method of manufacturing a composite fitting comprising the steps of:
- 1) injection molding a plastic body portion having a connecting end with a flange portion at said connecting end, the flange portion having an axially facing end surface on said connecting end with a circular groove;
- 2) preloading the body portion in a mold with the preloading at an interface at the circular groove on the connecting end;
- and
- 3) injecting molten plastic into a mold cavity extending around the flange portion to form a sleeve around the body portion at the flange, said plastic having greater rigidity than that of the body portion.
Dependencies are inferred from the claim text.