Abstract: The present invention is directed to a process for the manufacture of a blow molded container comprising a physical geometry that creates more than one undercut and a means for removal of said container from a mold used to form said container.

Abstract: A system for forming a plastic article, the system comprising a preform injection molding apparatus, comprising a mold, a plastic melt injection system, a sensor, and a controller, wherein: the first mold portion is made of a material having a thermal conductivity between about 52 watts per meter kelvin and about 385 watts per meter kelvin; the controller is configured to control the injection element to maintain the molten thermoplastic material at a substantially constant melt pressure, during filling of the mold cavities, wherein the substantially constant melt pressure is between about 2.76 megapascals (400 psi) and about 68.95 megapascals (10,000 psi); and the preform injection molding apparatus is designed to have a useful life of between one million and ten million injection molding cycles.

Abstract: A method of forming a preform, which is configured to be subjected to a subsequent forming process, the method comprising: providing a mold with a plurality of mold cavities, wherein the mold is made of a material having a thermal conductivity between about 52 watts per meter Kelvin and about 385 watts per meter Kelvin.

Abstract: An injection mold assembly for a high output consumer product injection molding machine, the injection mold assembly having a simplified cooling system. The simplified cooling system has a cooling complexity factor of less than three, preferably less than two, more preferably less than one.

Abstract: A low constant pressure injection molding machine forms molded parts by injecting molten thermoplastic material into a mold cavity at low constant pressures of 6,000 psi and lower. As a result, the low constant pressure injection molding machine includes a mold formed of easily machineable material that is less costly and faster to manufacture than typical injection molds.

Abstract: An injection mold assembly for a high output consumer product injection molding machine, the injection mold assembly having a simplified cooling system that is an evaporative cooling system or a cooling system including a hazardous, dangerous, or expensive cooling fluid. The simplified cooling system has a cooling fluid channel that is confined to a mold support plate.

Abstract: A low constant pressure injection molding machine forms molded parts by injecting molten thermoplastic material into a mold cavity at low constant pressures of 6,000 psi and lower. As a result, the low constant pressure injection molding machine includes a mold formed of easily machineable material that is less costly and faster to manufacture than typical injection molds.

Abstract: A melt pressure regulating mechanism for an injection molding apparatus having a melt holder for pressurizing molten plastic prior to injection into a mold, the molten plastic having a melt pressure, and an injection element for advancing the molten plastic from the melt holder through a nozzle and into the mold, the melt pressure regulating mechanism comprising a pressure regulating device, comprising at least one of a fluid pressure regulating valve and a pressure relief valve.

Abstract: A low constant pressure injection molding machine forms molded parts by injecting molten thermoplastic material into a mold cavity at low constant pressures of 6,000 psi and lower. As a result, the low constant pressure injection molding machine includes a mold formed of easily machineable material that is less costly and faster to manufacture than typical injection molds.

Abstract: An injection mold assembly for a high output consumer product injection molding machine, the injection mold assembly having a simplified cooling system. The simplified cooling system has a cooling complexity factor of less than three, preferably less than two, more preferably less than one.

Abstract: A low pressure injection mold includes a failsafe pressure mechanism that prevents the low pressure injection mold from being subjected to excessive injection pressures or excessive clamping tonnage that could damage the low pressure injection mold.

Abstract: Methods of producing toothbrush handles having an inner cavity are provided.

Abstract: An injection mold assembly for a high output consumer product injection molding machine, the injection mold assembly having a simplified cooling system that is an evaporative cooling system or a cooling system including a hazardous, dangerous, or expensive cooling fluid. The simplified cooling system has a cooling fluid channel that is confined to a mold support plate.

Abstract: An injection mold assembly for a high output consumer product injection molding machine, the injection mold assembly having a simplified cooling system that is an evaporative cooling system or a cooling system including a hazardous, dangerous, or expensive cooling fluid. The simplified cooling system has a cooling fluid channel that is confined to a mold support plate.

Abstract: An injection mold assembly for a high output consumer product injection molding machine, the injection mold assembly having a simplified cooling system that is an evaporative cooling system or a cooling system including a hazardous, dangerous, or expensive cooling fluid. The simplified cooling system has a cooling fluid channel that is confined to a mold support plate.

Abstract: The present invention relates to a process for blowing an article with at least one recess.

Abstract: A low constant pressure injection molding machine forms molded parts by injecting molten thermoplastic material into a mold cavity at low substantially constant pressures of 6,000 psi and less. As a result, the low constant pressure injection molding machine includes a mold formed of easily machineable material that is less costly and faster to manufacture than typical injection molds.

Abstract: Disclosed herein are methods of injection molding at low, substantially constant melt pressures. Embodiments of the disclosed method now make possible a method of injection molding that is more energy—and cost—effective than conventional high-velocity injection molding processes. Embodiments of the disclosed method surprisingly allow for the filling of a mold cavity at low melt pressure without undesirable premature hardening of the thermoplastic material in the mold cavity and without the need for maintaining a constant temperature or heated mold cavity. Heretofore, it would not have been expected that a constant pressure method could be performed at low pressure without such premature hardening of the thermoplastic material when using an unheated mold cavity or cooled mold cavity.

Abstract: Disclosed herein are methods of injection molding at low, substantially constant melt pressures. Embodiments of the disclosed method now make possible a method of injection molding that is more energy—and cost—effective than conventional high-velocity injection molding processes. Embodiments of the disclosed method surprisingly allow for the filling of a mold cavity at low melt pressure without undesirable premature hardening of the thermoplastic material in the mold cavity and without the need for maintaining a constant temperature or heated mold cavity. Heretofore, it would not have been expected that a constant pressure method could be performed at low pressure without such premature hardening of the thermoplastic material when using an unheated mold cavity or cooled mold cavity.