A feed system for an injection molding method and machine includes a first part including a first channel, and a second part including a second channel, the first channel and the second channel forming a molten plastic feed conduit when the first part is located adjacent to the second part. A joint is formed between the first part and the second part along the first channel and the second channel and the joint is one of a sintered joint, a welded joint, and a brazed joint.

An injection molding device includes a fixing section to which a molding die having a fixed molding die and a movable molding die, an injection section that injects a molding material, and a moving section that moves the injection section relative to the fixed molding die. The injection section includes a nozzle and an injection amount adjustment mechanism. The injection molding device further includes a control section configured to control the moving section, the injection amount adjustment mechanism, and a heater. The control section executes the following in a state where the molding die is mounted on the fixing section, a first control in which the nozzle is brought into contact with the fixed molding die and the molding material is injected, and a second control in which the nozzle is separated from the fixed molding die after a predetermined time elapses from the completion of the first control.

A virgin material plasticization time Tv, which is a time required for a screw to reach a predetermined plasticization end position Xe when only a virgin material Rv is plasticized, a crushed material plasticization time Ts, which is a time required for the screw to reach the predetermined plasticization end position Xe when only a crushed material Rs is plasticized, are measured and registered as basic time data Do. Actually measured time data Dp are obtained by measuring a crushed material mixed material plasticization time Tm when a molded product is produced by using the crushed material mixed material Rm, the crushed material mixed material plasticization time Tm being a time required for the screw to reach the plasticization end position Xe in a predetermined shot. The crushed material ratio Px in the crushed material mixed material Rm is obtained on the basis of the virgin material plasticization time Tv, the crushed material plasticization time Ts, and the crushed material mixed material plasticization time Tm. An output process is performed on the obtained crushed material ratio Px.

A control system and a control method of manufacturing injection molding products are provided. The control system includes an injection molding machine, an information input interface, a computing server and a data conversion device. At first, product information is inputted through the information input interface. The product information is transmitted to the computing server, and then the computing server determines injection molding parameters according to the product information. The injection molding parameters are transmitted to the information input interface. After data conversion through the data conversion device, the injection molding machine is controlled to manufacture the injection molding products according to the converted injection molding parameters.

An integrally molded body has a rectangular planar structure in which an inner resin material containing a thermoplastic resin is interposed between a plate material having a design surface and an outer resin material containing a thermoplastic resin, the planar structure having a first joint in which at least a partial region of the outer-peripheral-side surface part and/or the outer peripheral edge part of the plate is joined with the inner resin material, and a second joint in which at least a partial region of the outer-peripheral-side surface part and/or the outer peripheral edge part of the inner resin material is joined with the outer resin material.

A molding machine includes an injection device to inject a molding material into a mold and a control device to control the injection device. The injection device includes a heating cylinder filled with the molding material and a screw moving forward/backward inside the cylinder to inject the molding material, and can move forward/backward between a communication orientation where a distal end of the cylinder communicates with the clamped mold and a separation orientation where the distal end separates from the mold and can pivot on a pivot shaft between the separation orientation not allowing insertion/removal of the screw and a pivot orientation allowing the insertion/removal. The molding machine further includes a sensor to detect these orientations. The control device determines that the screw has been replaced by the sensor detecting that the injection device pivots from the separation orientation to the pivot orientation and returns to the separation orientation.

In one aspect, a method of molding a multilayer article comprises causing a surface layer material injection unit to commence injecting a surface layer material into a mold cavity via a surface layer material channel. Then, an internal layer material injection unit commences injecting an internal layer material into the mold cavity an internal layer material channel. Then, during application of a hold pressure upon the surface layer material in the surface layer material channel and with the surface and internal layer material injection units in fluid communication with one another, a pullback stroke is effected at the internal layer material injection unit. After a delay interval, at least one physical parameter indicative of a post-pullback pressure of the internal layer material is detected, and an indicator of pullback effectiveness is generated based on the post-pullback pressure indicated by the at least one physical parameter relative to a threshold pressure.

In one aspect, a method of molding a multilayer article comprises causing a surface layer material injection unit to commence injecting a surface layer material into a mold cavity via a surface layer material channel. Then, an internal layer material injection unit commences injecting an internal layer material into the mold cavity an internal layer material channel. Then, during application of a hold pressure upon the surface layer material in the surface layer material channel and with the surface and internal layer material injection units in fluid communication with one another, a pullback stroke is effected at the internal layer material injection unit. After a delay interval, at least one physical parameter indicative of a post-pullback pressure of the internal layer material is detected, and an indicator of pullback effectiveness is generated based on the post-pullback pressure indicated by the at least one physical parameter relative to a threshold pressure.

There is provided an injection molding machine including a material supply unit configured to supply a shaping material including plasticized thermoplastic resin, an injection unit including a manifold including a main flow path communicating with the material supply unit and a plurality of branch flow paths branching from the main flow path and a plurality of nozzles respectively coupled to the branch flow paths and configured to inject the shaping material to a die unit, a positioning unit configured to position the injection unit and the die unit, and a control unit configured to control operation of the material supply unit and the injection unit. The manifold includes a first member and a second member that are bodies separate from each other and can be assembled and separated, and the branch flow paths are formed in a boundary portion of the first member and the second member in an assembled state of the first member and the second member.

A flow rate adjusting device includes a main body portion including a supply flow path formed with a first opening through which a plasticized material obtained by plasticizing at least a part of a material containing a metal particle is supplied and a second opening through which the plasticized material is ejected, and an intersecting hole intersecting the supply flow path; a tubular sleeve disposed inside the intersecting hole and including a through-hole at a position overlapping the supply flow path; and a shaft-shaped valve unit disposed inside the sleeve, wherein the valve unit includes a concave portion at a position overlapping the supply flow path, and rotates inside the intersecting hole for changing a position of the concave portion, to change a flow path cross-sectional area of the supply flow path for adjusting a flow rate of the plasticized material ejected from the second opening.