Abstract: A first injection mechanism of an apparatus for molding articles injects coating material into a cavity defined in a clamped mold, thereby forming a predetermined coating on the inner surface of the cavity. After the coating material is injected into the cavity, a decompression mechanism lowers the pressure in the cavity through at least one vent. After the coating is formed on the inner surface of the cavity, a second injection mechanism injects molding material into the cavity. When the pressure in the cavity is being lowered, an opening-closing mechanism opens the vent. Before or during the injection of the molding material, the opening-closing mechanism closes the vent.

Abstract: A method for manufacturing an insert mold product using an insert member has machining step for machining the insert member using a machining assistant; a cleaning step for removing the machining assistant and foreign matter from the insert member, which foreign matter includes swarf created in the machining step; and an insert molding step for coating at least part of the surface of the insert member with a molding material. This prevents degradation in the quality of the product.

Abstract: A process for forming a coating layer on the surface of a molded product by boiling a coating solution in a closed metal mold. The molding process includes depressurizing the cavity of the metal mold, boiling a coating solution in the cavity and injecting a urethane material into the cavity under reduced pressure.

Abstract: A process for forming a coating layer on the surface of a molded product by boiling a coating solution in a closed metal mold. The molding process includes depressurizing the cavity of the metal mold, boiling a coating solution in the cavity and injecting a urethane material into the cavity under reduced pressure.

Abstract: A first injection mechanism of an apparatus for molding articles injects coating material into a cavity defined in a clamped mold, thereby forming a predetermined coating on the inner surface of the cavity. After the coating material is injected into the cavity, a decompression mechanism lowers the pressure in the cavity through at least one vent. After the coating is formed on the inner surface of the cavity, a second injection mechanism injects molding material into the cavity. When the pressure in the cavity is being lowered, an opening-closing mechanism opens the vent. Before or during the injection of the molding material, the opening-closing mechanism closes the vent.

Abstract: A process for injecting a urethane material into a mold cavity from a gate to mold articles. Urethane molded articles are produced by first forming a coating film layer on the inside surface of a mold cavity. Next, a first urethane material containing pigment is injected into the cavity. Finally, a second urethane material containing more pigment than the first urethane material is injected into the cavity.

Abstract: A polyurethane material is injected into a mold cavity having a reduced pressure to form e.g. the surface portion of a polyurethane covering for a steering wheel. A polyurethane material for forming a substantial inner portion thereof and free of any coloring matter is, then, injected into the cavity. Then, a polyurethane material containing coloring matter is injected into the cavity to form the remaining inner portion of the covering.

Abstract: A small amount of a non-yellowing surface-forming polyurethane material containing a polyether polyol, a hexamethylene diisocyanate trimer, a coloring agent and an organic bismuth catalyst is initially injected into a mold cavity under reduced pressure to form e.g. the surface portion of a polyurethane covering for a steering wheel. An inner-forming polyurethane material is subsequently injected into the cavity under reduced pressure to form an inner portion of the covering.

Abstract: In a first valve mechanism 30, a positive pressure spring 31 presses a first valve plug 34 to seat an external ring projection 37 of the first valve plug 34 onto a bottom surface 39 of a support cylinder 35. The first valve mechanism 30 opens at a first valve-opening pressure P1 responsive to a pressure balance across the positive pressure regulating valve plug 34. In a safety valve mechanism 60, the same spring (the positive pressure spring 31) presses a safety valve plug 61 via the external ring projection 37 seated on the bottom surface 39 to seat a sealing ring projection 62 of the safety valve plug 61 onto an upper face 63 of a partition wall 28. The safety valve mechanism 60 opens at a second valve-opening pressure P2 responsive to a pressure balance across the safety valve plug 61.