Abstract: A skin layer is formed on sides of a resin panel along the direction of the panel thickness and both surfaces of the resin panel substantially orthogonal to the sides. An expanded layer is formed in an inner part of the panel surrounded by the skin layer to have a multiplicity of voids. Inner ribs are formed of solid layers in the expanded layer to extend along the surfaces and the direction of the panel thickness so that both the longitudinal ends of each inner rib continue out to the skin layer at the opposed sides. Reinforcing members are inserted into the inner ribs respectively, to expose both the longitudinal end surfaces thereof from the opposed sides. Both the longitudinal end surfaces of each reinforcing member are formed with engaging holes releasably engageable with a support member for supporting the reinforcing member in the cavity of the mold assembly.

Abstract: A resin panel for an automobile includes a skin layer formed on sides of a package tray along the direction of the thickness of the package tray and both surfaces of the package tray substantially orthogonal to the sides. An expanded layer is formed in an inner part of the package tray surrounded by the skin layer having voids by enlarging the volume of the cavity of a mold assembly during molding of the package tray to expand a thermoplastic resin in the cavity. Hollow ribs are formed of solid layers in the expanded layer to extend along the surfaces, each have a hollow formed inside over the entire length so that ends of the hollow rib continue out to the skin layer at the opposed sides of the panel. Openings in communication with the hollow rib are formed through the skin layer at the opposed sides, respectively.

Abstract: A skin layer (19) is formed of a solid layer on sides (15) of a package tray along the direction of the thickness of the package tray and both surfaces (17) of the package tray substantially orthogonal to the sides (15). An expanded layer (21) is formed in an inner part of the package tray surrounded by the skin layer (19) to have a multiplicity of voids by enlarging the volume of the cavity of a mold assembly during molding of the package tray to expand a thermoplastic resin in the cavity. Hollow ribs (23) are formed of solid layers in the expanded layer (21) to extend along the surfaces (17) and each have a hollow (23a) formed inside over the entire length so that both ends of each hollow rib continue out to the skin layer (19) at the opposed sides (15) adjacent thereto. Openings (19a) in communication with the hollow (23a) of the hollow rib (23) are formed through the skin layer (19) at the opposed sides (15), respectively.

Abstract: A skin layer (19) is formed on sides (15) of a resin panel along the direction of the panel thickness and both surfaces (17) of the resin panel substantially orthogonal to the sides (15). An expanded layer (21) is formed in an inner part of the panel surrounded by the skin layer (19) to have a multiplicity of voids by enlarging the volume of the cavity of a mold assembly during molding of the resin panel to expand a thermoplastic resin in the cavity. Inner ribs (23) are formed of solid layers in the expanded layer (21) to extend along the surfaces (17) and the direction of the panel thickness so that both the longitudinal ends of each inner rib continue out to the skin layer (19) at the opposed sides (15). Reinforcing members (24) are inserted into the inner ribs (23), respectively, in the course of molding of the resin panel to expose both the longitudinal end surfaces thereof from the opposed sides (15).

Abstract: An automobile door structure of this invention is formed by joining an outer panel and inner panel to each other. The inner panel has an opening portion. A resin-made carrier plate which supports accessories of a door is attached to the inner panel so as to cover the opening portion. An upper trim portion extending to cover a vehicle compartment side of a belt portion of the door is integrally molded on an upper portion of the carrier plate. A trim plate is attached to a portion of the carrier plate which is below the upper trim portion so as to cover the vehicle compartment side of the carrier plate.

Abstract: The present invention provides a channel housing comprising curving channels whereby complex and varied channels can be compactly contained.Plural curving channels that must be connected to plural valves, for example, are formed by partitioning walls forming curving channels inside a pair of symmetrical housing halves, which are then bonded together to form the complex channel system.The housing halves may be joined by welding or adhesive bonding. To improve the bonding strength, a pair of opposing channel members is provided along the length of the contacting members that are welded or bonded. The cavity formed by the opposing channel members D, D is then filled with an adhesive resin M to integrate the two halves.

Abstract: The present invention provides a channel housing comprising curving channels whereby complex and varied channels can be compactly contained.Plural curving channels that must be connected to plural valves, for example, are formed by partitioning walls forming curving channels inside a pair of symmetrical housing halves, which are then bonded together to form the complex channel system.The housing halves may be joined by welding or adhesive bonding. To improve the bonding strength, a pair of opposing channel members is provided along the length of the contacting members that are welded or bonded. The cavity formed by the opposing channel members D, D is then filled with an adhesive resin M to integrate the two halves.

Abstract: An injection molding machine for molding hollow plastic products which includes a pair of molds wherein one of the molds is supported rotatably about the center axis thereof a frame of the machine and each of the molds has at least one set having one male die and two female dies arranged on each product plane at an equal distance from an equal angular pitch about the center axis thereof. The rotatable mold is rotated reciprocally between first and second angular positions at each of which a primary molding of a pair of half products and a secondary molding of a complete product are performed simultaneously.