Apparatus and methods for converting resin into colored finished or semi-finished plastic parts include a process machine having a barrel, a rotatable screw inside the barrel, and a color feed conduit assembly extending into the barrel for passage of liquid color through the color feed conduit assembly into proximity with the screw.

An object is to manufacture molded bodies having a small variation among products even if the mixture amount of a metal powder is increased when molding is performed by directly introducing not only a metal powder but also a powdered resin into an injection molding machine.

In a metal powder mixed resin molded body manufacturing method for manufacturing a molded body by kneading a molding material including a metal powder, a thermoplastic resin powder, and an additive agent, molding is performed by an injection molding machine in which a molding screw is arranged. The molding screw of the injection molding machine includes a feeding portion, a compressing portion, and a metering portion that are continuously and integrally provided, the feeding portion and the compressing portion are constituted by an one-line spiral flight, the flight of the compressing portion includes a plurality of sub-flights that extend in a spiral manner in a screw axis direction and the sub-flights each have a polygonal shape with rounded corner portions, and the sub-flights are arranged such that the corner portions are shifted by a set angle in a circumferential direction about the screw axis, and the metering portion is provided with a plurality of blending/aligning portions each having gear-like protrusions and recesses in a circumferential direction about the screw axis.

An electronic device with a recognizable shell is provided. At least a portion of the recognizable shell is manufactured by a method including mixing a plastic material and a color material to obtain a mixture material, increasing an environment temperature of the mixture material to a preheating temperature lower than the plastic material melting point, increasing the environment temperature above the preheating temperature, increasing the environment temperature to a temperature 5 to 10 degrees above the plastic material melting point; increasing the environment temperature above the color material melting point, injecting the mixture material in a mold cavity of a mold, maintaining the mold in under a molding pressure, and obtaining the cooled mixture material as the portion. A manufacturing method for recognizable covering plate is also provided.

Proposed is a method of manufacturing an antibacterial mobile phone case using a TPU antibacterial masterbatch. The method includes: (a) preparing an antibacterial masterbatch by dispersing an antibacterial agent and an additive in thermoplastic polyurethane and then performing extrusion molding; (b) preparing an antibacterial masterbatch by dispersing an antibacterial agent and an additive in thermoplastic polyurethane and then performing extrusion molding; (c) dispersing and mixing the color masterbatch prepared in step (a) in thermoplastic polyurethane; (d) dispersing and mixing the antibacterial masterbatch prepared in step (b) in thermoplastic polyurethane; and (e) dispersing the material mixed in step (c) and the material mixed in step (d) and then performing injection molding.

A static homogenizing apparatus for blending a fluid additive with a polymer melt includes: (a) a homogenizing conduit; and (b) a plurality of homogenizing elements in the conduit for flow of the melted resin and fluid additive through the homogenizing elements in series. The plurality of homogenizing elements includes a plurality of mixing elements and at least one amplifier element. Each mixing element has a quantity of mixing channels passing therethrough, and each amplifier element has a quantity of amplifier channels passing therethrough. The quantity of amplifier channels is greater than the quantity of mixing channels.

Methods and systems of delivering liquid additives in a molding system are provided. A charging sensor is provided to monitor the status of the injection charging mechanism of the molding system which charges, meters or doses an injection volume of molding material. A dosing instruction is generated based on the charging status signal. The additive pump controls the delivering of the liquid additives into the injection unit based on the dosing instruction, while the injection charging mechanism is charging the injection volume of molding material.

A production method of producing a fiber-reinforced resin molding includes: kneading, in a kneader, molten thermoplastic resin with opened reinforcing fibers obtained by opening a bundle of reinforcing fibers, to produce a kneaded mixture; and placing or charging the kneaded mixture into a molding device to produce a fiber-reinforced resin molding.

The present invention relates to the use of pheromones having a high degree of purity to manufacture plastic diffusers containing an insect pheromone filler and having stiffness and fracture-resistant properties that can be used in the tensile or compressive field. The invention also relates to a method for manufacturing said articles by means of injection.

Provided is an injection molding method for resin that contains reinforcing fiber, the method being capable of easily eliminating uneven distribution of added components. The injection molding method is provided with: a plasticizing step for supplying resin pellets P and added components to a cylinder equipped with a screw 10, which has a rotating axis as the center is capable of rotating normally and in reverse, and generating molten resin by rotating the screw 10 in the normal direction; and an injecting step for injecting the molten resin M comprising the added components into a cavity. In the plasticizing step, a reverse rotation operation for reversing the rotation of the screw 10 is performed or a screw-stopping operation of stopping the normal rotation of the screw 10 is performed with a prescribed timing and for a prescribed period.

Apparatus and methods for converting granular plastic resin into colored finished or semi-finished plastic parts include a process machine having a barrel with a vertically opening feed throat, a rotatable screw inside the barrel, and a color feed conduit assembly positioned at least partially within the process machine and extending into the barrel for passage of liquid color downwardly through the color feed conduit assembly into proximity with the screw.