Method of molding a shopping cart
AssigneeTarget Brands, Inc.
InventorsDavid L. Pruitt, Mark T. Ryan, Charles E. Shell, Robert D. Peota, Kenneth R. Crow, Matthew E. Sayer
Life of this patent
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Abstract
A method of molding a shopping cart component includes providing a first subcomponent and then overmolding the shopping cart component as a second subcomponent about the first subcomponent. The first subcomponent acts as an obstacle to a plastic injection stream and to a gas injection stream during the overmolding of the second component to assist in defining a first hollow section of the shopping cart component adjacent the first subcomponent.
Claims20
A method of molding a shopping cart component comprising:
- providing a first subcomponent;
- and
- forming the shopping cart component, via overmolding a molten plastic about the first subcomponent within a mold, by introducing the first subcomponent as an obstacle within the mold to partially define a first hollow section of the shopping cart component adjacent the first subcomponent.
A method of molding a handle of a shopping cart, the method comprising:
- providing a mold shaped to produce a generally loop-shaped handle, the handle including at least one rear corner portion and a front portion, the front portion located at a generally opposite end of the handle relative to the at least one rear corner portion;
- injecting a molten plastic via a plastic injection port, adjacent the at least one rear corner portion of the handle, to flow along a first plastic flow path and a second plastic flow path within the mold until the mold is completely filled with the molten plastic, wherein the first plastic flow path extends in a generally opposite direction from the second plastic flow path;
- injecting a gas via a gas injection nozzle, adjacent the at least one rear corner portion of the handle, to flow along a first gas flow path and a second gas flow path into the molten plastic within the completely filled mold to forcibly push a portion of the molten plastic out of the mold, into at least one spillover well located adjacent the front portion of the handle, to form a hollow structure of the handle, wherein the first gas flow path extends in a generally opposite direction from the second plastic flow path;
- and
- removing the generally loop-shaped handle from the mold.
A method of molding an all-plastic shopping cart comprising:
- forming a generally hollow handle of the shopping cart within a first mold via a full shot, gas-assisted plastic injection molding process;
- forming a basket of the shopping cart within a second mold via a full shot, gas-assisted plastic injection molding process, the basket including at least one hollow section;
- forming a generally hollow base of the shopping cart within a third mold via a full shot, gas-assisted plastic injection molding process;
- and
- assembling the shopping cart via removably attaching the handle to the basket and via removably attaching the base to the basket.
A method of molding a product comprising:
- providing a first subcomponent;
- and
- forming the product, via gas-assisted, plastic injection overmolding of a molten plastic about the first subcomponent within a mold, including positioning the first subcomponent within the mold to direct a gas flow path within the mold to partially define a first, gas-filled hollow section of the product adjacent the first subcomponent;
- and
- removing the product from the mold.
Dependencies are inferred from the claim text.