Omnova Solutions Inc.

John Thompson

Elliott Straus

Douglas S McBain

Douglas Mcbain

A molding apparatus includes a mold () defining a plurality of mold cavities (). Fluidly connected to the mold cavities () are one or more first composition injectors () and one or more second composition injectors () for delivery of, respectively, the molten material from which the molded article is to be formed and a composition to coat the article so formed.

Coating in multiple injection molding part cavities

A method of modifying an existing injection molding system so that the system can produce articles wherein at least one of the surfaces is coated while the article remains in the mold. The method includes the steps of providing a dispensing system for a coating composition and modifying an injection molding system to communicate with the dispensing system. The modification can include at least one nozzle to inject and direct the coating composition onto at least one surface of the molded article.

Method for modifying existing mold systems to utilize an in-mold apparatus

A method of designing and producing a mold for manufacturing an article having at least one surface coated by a coating. The method including evaluating the article design to determine the probable flow characteristics of the mold, an optimal flow of the coating composition, and an optimal location for the coating composition injector. A mold is designed and produced based on the evaluation.

Method of designing and producing a mold

A substrate having a barrier comprising a raised rim to prevent an in-mold coating from flowing into a gate pin assembly or substrate injection inlet area wherein a substrate is injected into the mold cavity. The barrier prevents cross contamination between a substrate resin orifice and the in-mold coating. A method for isolating an injection inlet area or gate pin assembly from in-mold coatings is also described.

In-mold coating barrier for a substrate injection orifice

Molded articles or substrates having an in-mold coating thereon are disclosed. The in-mold coated substrates are produced by a method wherein the flow of the in-mold composition onto the substrate can be selectively controlled. The molded articles can be preferentially coated in desired or predetermined areas with in-mold coating compositions by controlling the thickness or depth of various sections of the substrate.

Selectively controlling in-mold coating flow

Molded articles or substrates having an in-mold coating thereon are disclosed. The in-mold coated substrates are produced by a method wherein the flow of the in-mold composition onto the substrate can be selectively controlled. The molded articles can be preferentially coated in desired or predetermined areas with in-mold coating compositions by controlling the thickness or depth of various sections of the substrate. A molded article or substrate is provided with a removable in-mold coating containment flange which extends completely around the perimeter of a surface to be coated in order to substantially contain the in-mold coating within the mold cavity and on the desired area of a part before the coating has been cured.

Removable defined flange for in-mold coating containment

A mold runner for a runner or sprue type injection molding apparatus. The mold runner allows the passage of a substrate material from an injection source into a mold cavity and contains a containment shroud which utilizes the relative incompressibility of the substrate material in the containment shroud which prevents an in-mold coating, which is injected into the mold cavity in a subsequent step, from flowing into the injection substrate source thereby contaminating the same.

Mold runner for prevention of in-mold coating flow

The present invention is a process for producing an injection-molded thermoplastic workpiece having a thermoset coating bonded thereto, comprising the steps of introducing in three stages into a closed mold a thermoplastic material, such as a polyolefin, heated to a temperature above its melting point and molding said material to form a workpiece; cooling the workpiece to a temperature less than its melt temperature introducing a thermoset coating composition into the closed mold to cover at least a portion of a surface of the workpiece. The mold is then opened and the workpiece is removed after the coating composition has at least partially cured. The invention is also directed to a molded article made by the described process.

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Wooster, OH, United States of America

John Thompson