摘要:
A numerical method operating within a processor-based environment for predicting the fill pattern and coating pressure distribution for a substrate in a computer simulation of an in-mold coating flow within a two-dimensional flow domain having a plurality of possible inlet nodes for injection, which includes the steps of initializing pressure and thickness change of the substrate for at least one of the inlet nodes, determining which of the inlet nodes are newly filled nodes and new flow front nodes, calculating pressure for the newly filled nodes; updating thickness and coating volume of the substrate, checking if pressure and time step have converged, and updating pressure and time step and returning to the pressure calculation step if pressure and time step calculations have not converged, and determining whether the substrate is filled, and updating filling time and returning to the determining step if the substrate is not filled.
摘要:
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.
摘要:
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.
摘要:
A molding apparatus includes a mold (12,14) defining a plurality of mold cavities (34,36). Fluidly connected to the mold cavities (34,36) are one or more first composition injectors (30) and one or more second composition injectors (32) 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.
摘要:
A molding apparatus includes a mold (12,14) defining a plurality of mold cavities (34,36). Fluidly connected to the mold cavities (34,36) are one or more first composition injectors (30) and one or more second composition injectors (32) 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.
摘要:
A molding apparatus and method is provided that allows an in-mold coating to be injected from one side of a molded article onto another show side of the molded article. A first composition injector injects a thermoplastic composition into a molding cavity of a mold to form the molded article. A second composition injector injects an in-mold coating composition into the one side of the molded article, through the molded article and onto the show side of the molded article.
摘要:
A quality assurance method for in-mold coating of molded articles in which coated articles produced with one set of molding and coating process variables are inspected and changes are made to one or more of the variables based on the observations. Changes to one or more such variables based on the observations aid in producing subsequent coated articles of consistently high quality.
摘要:
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.
摘要:
A method is provided for metering and controlling the dispense rate of an in-mold coating composition into a mold cavity (16) and onto a thermoplastic molded article contained therein. A heated thermoplastic material is injected into the mold cavity (16). The thermoplastic material is allowed to form a thermoplastic article in the mold cavity (16). An in-mold coating composition is injected into the mold cavity (16) and onto the thermoplastic article. The amount of said in-mold coating composition injected into the mold cavity (16) and onto the article is controlled. The rate that the in-mold coating composition is injected into the mold cavity (16) and onto the in-mold coating article is controlled.
摘要:
An in-mold coating method wherein the time at which a coating substrate is injected onto a surface of a molded substrate is determined by the internal mold temperature and/or pressure. By regulating the point at which the in-mold coating is injected based on the internal mold temperature and/or pressure, an operator can assure that the in-mold coating is injected when the surface of the molded substrate is in an ideal condition for in-mold coating adhesion.