A resin molded article manufacturing method comprises forming a cavity having a shape corresponding to a resin molded article by bringing a plurality of resin molding dies into contact with each other, and forming the resin molded article by injecting a resin directly from a resin ejection port into a resin injection gate and filling the cavity with the resin. The forming of the resin molded article includes filling the cavity with the resin while changing a flow of the resin that is headed from the resin injection gate directly toward the cavity by a resin flow changing section that is provided opposite the resin injection gate.

This injection-molded article is an injection-molded article using a cellulosic fiber composite resin, including: a resin insert piece including a colorant or a cellulose fiber; a first region formed of the cellulosic fiber composite resin; and a second region formed along a weld line of the cellulosic fiber composite resin extending from the resin insert piece, in which the first region and the second region have different color tones.

A method of molding an interior part for a vehicle includes determining a 3D graphic sample model. A shape of the sample model has concave portions having curvatures determined through 3D modeling and gradients of an inner surface of each concave portion. A molded sample having the same general shape as the sample model is injection molded. Information related to scratch occurrence positions is acquired from the molded sample. Information of curvatures and gradients of the concave portions of the sample model are acquired and collected at positions on the sample model corresponding to the scratch occurrence positions. A limit angle and limit angle are determined by using the collected information and preset curvatures for the concave portion of a design of the interior part. The interior part having the concave portion with a shape based on the determined draft angle and the preset curvatures can then be injection molded.

Injection molded container article including a center portion having an outer perimeter. The center portion has a central flow leader defined therein, the central flow leader having a central flow leader thickness. A side wall portion extends from the outer perimeter to an outer rim portion. The center portion and the side wall portion together define a container space having a volume. The side wall portion includes a plurality of side wall flow leaders and a plurality of side wall panels extending between adjacent flow leaders and having side wall panel thickness less than the central flow leader thickness. Each side wall flow leader has a side wall flow leader thickness greater than the side wall panel thickness, and each flow leader extends between the central flow leader and the outer rim portion. Method of making the injection molded container article also provided.

Disclosed is an injection mold for manufacturing an injection-molded article to which a substrate is bound in-mold during injection, the substrate having an adhering surface for binding to the article and a leading edge at an upstream end of the substrate. The injection mold comprises a first mold component and a second mold component together defining a cavity into which a molten plastic material is injected to form the article. The injection mold includes a flow deflector disposed on at least one of the first and second mold components, wherein the flow deflector deflects a flow of the molten plastic material over the leading edge of the substrate such that the flow makes first contact with the substrate downstream of the leading edge, thereby forming a temporary air pocket at the leading edge of the substrate which is then back-filled by the subsequent flow of the molten plastic material.

The invention is directed to a process to manufacture an interconnected stack of thermoplastic frames having two sides by stacking the thermoplastic frames to obtain a stack of frames such that the facing sides of two neighbouring frames are in contact with each other at a contact area. When stacking a longitudinal conduit is formed which runs along the length of the stack and a branched conduit is formed at the contact area. The interconnected stack of thermoplastic frames are obtained by supplying a pressurised melt of a plastic material to the elongated conduit and branched conduits.

Provided is an inexpensive and highly reliable resin sealed-type onboard electronic control device is mounted in a vehicle such as an engine control unit and a control unit for automatic transmission, which have a heat dissipation structure for dissipating heat generated from an electronic component such as a semiconductor element. The onboard control device includes a circuit board, a member provided to face the circuit board, a heat generating electronic component mounted between the circuit board and the member, a heat dissipating material provided between the heat generating electronic component and the member, and a sealing resin to seal the circuit board and the heat generating electronic component. And a space between the member and the circuit board is at least a part of a range where the heat dissipating material is not provided, and is narrower than a range where the heat dissipating material is provided.

The invention is directed to a process to manufacture an interconnected stack of thermoplastic frames having two sides by stacking the thermoplastic frames to obtain a stack of frames such that the facing sides of two neighbouring frames are in contact with each other at a contact area. When stacking a longitudinal conduit is formed which runs along the length of the stack and a branched conduit is formed at the contact area. The interconnected stack of thermoplastic frames are obtained by supplying a pressurised melt of a plastic material to the elongated conduit and branched conduits.

Since a second reinforcing rib (24e) protruding from a motor accommodating portion (24) to outside is provided to a portion formed with a weld line (WL) formed by the merger of molten resin (MR), the material thickness of the portion formed with the weld line (WL) can be increased. Therefore, the strength of the portion formed with the weld line (WL) is improved, and the strength of a case (21) as a whole can be improved. The case (21) sufficiently resistible to outer shocks can be achieved, and can be sufficiently used even in adverse environments such as a place near an undercarriage of a vehicle, and high reliability can be obtained. Since a small flange portion is provided on a caliper fixing portion side which supports an output shaft where large running torque is loaded, the weld line can be kept away from the caliper fixing portion, with this small flange portion taken as an inlet portion for the molten resin. Thus, with the caliper fixing portion side of the case inhibited from being distorted, it is possible to reliably inhibit unusual noise and so forth from occurring from an actuator.

In order to produce a tubular filter membrane element for microfiltration purposes, a plastic section of a small membrane tube is sealed at one axial end thereof and is fitted with a plastic adapter piece at the opposite end. The adapter piece is injection-molded onto the section of the small membrane tube and is preferably welded thereto. The section of the small membrane tube is sealed at the one axial end thereof by bringing this end into contact with a hot stamp.