Durable bone with soft core
View Patent ↗The present invention, in one exemplary embodiment, relates a method of manufacturing an animal chew by molding two body portions of a first material each having at least one concave surface and one or more through holes, attaching the two portions together such that the concave surfaces face one another to form a hollow body portion, injecting a second material into the hollow body portion to fill at least a portion of the hollow body and form areas of exposed regions of the second material by filling the one or more through holes. In a second exemplary embodiment, the two portions may have the concave surfaces over-molded with a second material which fills the one or more through holes. In a third exemplary embodiment, a separate shape of a second material may be molded in a configuration having dimensions complementary to the two half portion and holes when the portions are combined.
1. A method of manufacturing an animal chew comprising;
providing a first material;
molding said first material into the shape of two separate body portions at least one of said body portions having a concave inner surface and one or more through-holes and wherein the other said body portions has a concave inner surface and one or more through-holes;
providing a second material;
placing each of said body portions in a second mold and over-molding the concave inner surfaces and filling said one or more through holes with said second material such that a portion of said second material remains exposed through the outer surface of each of said body portions; and
attaching said two over-molded body portions together such that the concave inner surfaces face one another to form a hollow animal chew with first and second materials exposed.
2. The method of claim 1 wherein the two over-molded body portions are attached by mechanical, adhesive or plastic welding means.
3. The method of claim 1 wherein at least one of said through holes has a cross-sectional dimension at some location above the bottom of said hole that is greater than the cross-sectional dimension at the bottom of the hole.
4. The method of claim 1 wherein said first material comprises a polyamide and said second material comprises a polyurethane.
5. The method of claim 1 wherein said two over-molded half body portions are attached at a joint line and said joint line is covered by a trim strip and said trim strip fills said joint line.