A resin composition is provided which includes a resin component, a fibrous filler, and a plate-like filler. With respect to 100 parts by mass of the resin component, the content of the fibrous filler is from 30 parts by mass or more to 100 parts by mass or less, the content of the plate-like filler is from 20 parts by mass or more to 80 parts by mass or less, and the total content of the fibrous filler and the plate-like filler is from 50 parts by mass or more to 180 parts by mass or less. The resin component includes an amorphous resin, and the content of the amorphous resin is from 60 parts by mass or more to 100 parts by mass or less.

A shrinkage detection device for a polymer injection molding apparatus detects a shrinkage experienced by an injection molded element for assessing a quality of the molded element. Shrinkage, along with temperature and pressure of the melt within the mold during cooling, indicates a sufficiency of the resulting molded element for intended purposes. Sufficiency includes parameters such as flexibility, shear strength and longevity, and is accurately performed can replace conventional sample testing of molded articles that are expensive and time consuming.

A method and apparatus for producing hollow articles made of injection moulded plastic material by a mould having a die within which there is inserted a core, and at least one injector including a pin valve displaceable between a closing position and an opening position for injecting the pressurized plastic material into a space comprised between the die and the core. During the injection, any flexural deflection of the core is detected and the pin valve of the or of each injector is displaced in a controlled fashion to adjust a pressure and a flow rate of the injected plastic material, so as to reduce or eliminate such deflection of the core.

The present invention relates to a polyvinyl alcohol-based resin composition containing a polyvinyl alcohol-based resin (A), in which a molding shrinkage rate in at least one direction of an MD direction and a TD direction during injection molding is 0.4% or more.

A injection molding method involves measuring, using at least one external sensor, a change in a parameter of a mold side of a mold cavity, approximating a condition within the mold cavity based on the change in the parameter, such as pressure within the mold cavity or flow front position, and comparing the approximated condition to a trigger point. If the approximated condition equals or exceeds the trigger point, activating a virtual cavity sensor having an optimal pre-defined pressure-time curve, and upon activation, the virtual cavity sensor tracks an approximated condition calculated from the change in parameter measurements measured by the at least one external sensor over time. In an embodiment, results of the approximated parameter tracking can be used in conjunction with an optimal pre-defined pressure-time curve.

The application belongs to the technical field of automobile plated part, and in particular relates to an automobile, an automobile plated part, an automobile plated part mold and a manufacturing method thereof. The method for manufacturing automobile plated part mold comprises the steps of: establishing a first simulation model of the automobile plated part mold based on a set shape of the substrate of the automobile plated part; using the first simulation model to simulate injection process of the substrate to obtain a first simulation substrate; performing at least one modification processing on the first simulation model, so that a second simulation model thus obtained satisfies the following requirements: using the second simulation model to simulate the injection process of the substrate to obtain a second simulation substrate conforming to the set shape; manufacturing the automobile plated mold according to the second simulation model.

An impregnation test apparatus includes: (1) a main body portion including a stage part having a recessed part in which an object to be impregnated is mounted, a bottom part of the recessed part provided with a plurality of through holes, an upper lid part mounted on the stage part, the upper lid part provided with a plurality of through holes in a parallel direction to the through holes, and a hollow part formed therein by mounting the upper lid part on the stage part, (2) an impregnation liquid supply portion connected to the main body portion and supplying the impregnation liquid to the hollow part of the main body portion through the through hole formed in the stage part, and (3) a fixing mechanism fixing the object to be impregnated mounted on the stage part into the hollow part by mounting the upper lid part on the stage part.

A shrinkage detection device for a polymer injection molding apparatus detects a shrinkage experienced by an injection molded element for assessing a quality of the molded element. Shrinkage, along with temperature and pressure of the melt within the mold during cooling, indicates a sufficiency of the resulting molded element for intended purposes. Sufficiency includes parameters such as flexibility, shear strength and longevity, and is accurately performed can replace conventional sample testing of molded articles that are expensive and time consuming.

Method for inspecting elongate injection-molded parts having an axis of symmetry in a holding device, comprising: detecting a reference area in a first measurement area of the part in the holding device through detection means, wherein the reference area is selected such that the axis of symmetry of the part can be calculated from the measurement data of the reference area, calculating the axis of symmetry from the measurement data of the measured reference area, measuring the spatial position of a section of axis of symmetry of a second measurement area, spaced apart from the first measurement area in axial direction, of the part, and determining whether the spatial position of the section of axis of symmetry, measured in the third step, of the part, coincides in the second measurement area with the axis of symmetry calculated in the second step, or not.

Methods, systems, and apparatus, including medium-encoded computer program products, for injection molding warp prediction include: obtaining a mold model and measured shrinkage data for at least one material, predicting an amount of warpage for a part manufactured using the mold by computational simulation of an injection molding process, where the computational simulation uses an internal residual stress model for the part that uses calibrated values for both a coefficient of thermal expansion and an elastic modulus and/or a Poisson's ratio of the at least one material, in at least one direction, for at least thermal stress due to cooling and pressure compensation during and/or after a packing phase of the injection molding process, in accordance with the measured shrinkage data for the at least one material, and providing the amount of warpage predicted for the part manufactured using the mold.