Valve for a dispensing container
A valve assembly for a dispensing container includes a closure body detachably coupled to a co-injected valve. The closure body includes a main closure body coupled to a closure cap via a flexible hinge. The co-injected valve includes a valve head and a valve frame. The valve head includes a valve head portion with multiple valve head slits, a sleeve portion, and a peripheral sealing flange. The valve frame is permanently coupled to the valve head and includes a radial ledge and a radial wall that support the peripheral sealing flange of the valve head. The co-injected valve is fabricated via a two-step injection molding process. The first step includes fabricating the valve frame from a first injection material, and the second step includes fabricating the valve member from a second injection material.
1. A co-injection molded valve comprising:
a valve head comprising:
a valve head portion with one or more valve head slits, the valve head portion having a first thickness;
a hinge portion coupled to the valve head portion, the hinge portion having a second thickness;
a sleeve portion coupled to the hinge portion, the sleeve portion having a third thickness; and
a peripheral sealing flange coupled to the sleeve portion; and
a valve frame permanently coupled to the valve head and comprising:
a radial ledge; and
a radial wall, the radial wall supporting the peripheral sealing flange such that the hinge portion is located substantially above the radial wall;
wherein the second thickness is substantially greater than the first thickness and substantially greater than the third thickness, such that the hinge portion, the sleeve portion, and the peripheral sealing flange are stationary as the valve head transitions between a closed valve position and an open valve position; and
wherein the co-injected molded valve is fabricated via an injection molding process comprising at least two steps, a first step comprising fabricating the valve frame from a first injection material, and a second step comprising fabricating the valve head from a second injection material.
2. The co-injection molded valve of claim 1 , wherein the first injection material is polypropylene.
3. The co-injection molded valve of claim 1 , wherein the second injection material is a thermoplastic elastomer.
4. The co-injection molded valve of claim 1 , wherein the one or more valve head slits is formed via a mechanical cutting process.
5. The co-injection molded valve of claim 1 , wherein the one or more valve head slits is formed via a laser cutting process.
6. The co-injection molded valve of claim 1 , wherein the radial wall comprises a retention notch configured to couple the co-injection molded valve to a dispensing container closure body via at least one of a snap fit assembly process and an ultrasonic assembly process.
7. The co-injection molded valve of claim 1 , wherein the valve frame further comprises an access window configured to permit passage of an injection molding nozzle used to deposit the second injection material.
8. The co-injection molded valve of claim 6 , wherein the dispensing container closure body comprises a closure cap, the closure cap comprising a stopper configured to support the valve head when the closure body is in a closed cap position.