摘要:
The present invention provides a molding machine that can easily detect viscosity of resin in a cylinder without advance preparations. An injection molding machine (10) includes an ultrasonic viscosity sensor (20), and the ultrasonic viscosity sensor (20) includes an ultrasonic vibration portion in contact with resin filled in a cylinder (12).
摘要:
The present invention provides a resin composition for a fiber-reinforced composite material, which has excellent fluidity and impregnation into a fiber base material and which produces a cured product having excellent heat resistance. A resin composition for a fiber-reinforced composite material contains, as essential components, a poly(glycidyloxyaryl) compound (A), a polymerizable monomer (B) which is an unsaturated carboxylic acid or an anhydride thereof and has a molecular weight of 160 or less, an aromatic vinyl compound or a (meth)acrylate (C), and a radical polymerization initiator (D), wherein an equivalent ratio [glycidyloxy group/acid group] of a glycidyloxy group in the component (A) to an acid group in the component (B) is 1/1 to 1/0.48, and a molar ratio [(B)/(C)] of the component (B) to the component (C) is in the range of 1/0.55 to 1/2.
摘要:
A method for monitoring, documenting, and/or controlling an injection molding machine (P) having an injection molding tool (1) into which a melt is introduced, wherein a viscosity of the melt in the injection molding tool (1) is determined directly.
摘要:
A plant for the continuous production of preforms for plastic containers using at least polyester recyclate for the filling of foodstuffs, having at least one melt-producing upstream plant section, at least one preform producing injection molding plant section, and a plant control system, where at least the melt-producing upstream plant section and the injection molding plant section are interlocked at an interface to form a plant block. For the derivation of process alteration strategies and/or preform qualifying strategies, an inline measurement station including an evaluating device is provided at the interface for at least one quality parameter of the melt measured in the process flow.
摘要:
A nozzle is attached to a heating cylinder via a nozzle adapter. A sensor for pressure measurement is attached to the nozzle adapter. A molten resin is injected into the air with a front of the nozzle open, and a resin pressure is measured by pressure measuring unit while the molten resin is being injected into the air. Based on the resin pressure, the viscosity of the injected molten resin is determined.
摘要:
A computer-implemented method and non-transitory computer medium for calculating a shrinkage of a molding product comprises a step of using a computer processor to calculate a molding pressure of a molding fluid in a molding cavity by taking into consideration an increase of a shear viscosity of the molding fluid by a decrease of a shear rate, and a step of calculating the shrinkage of the molding products by taking into consideration a variation of a specific volume of the molding fluid as the molding pressure and a molding temperature decrease.
摘要:
A measuring device for an injection molding system for ascertaining a batch-specific characteristic number of a plasticized plastic includes a flow channel which is situated between a plasticizing unit of an injection molding machine and an injection molding tool, a first pressure sensor and a second pressure sensor and a first temperature sensor and a second temperature sensor being situated along the flow channel. The flow channel has a taper between the first pressure sensor and the second pressure sensor.
摘要:
A measuring device for an injection molding system for ascertaining a batch-specific characteristic number of a plasticized plastic includes a flow channel which is situated between a plasticizing unit of an injection molding machine and an injection molding tool, a first pressure sensor and a second pressure sensor and a first temperature sensor and a second temperature sensor being situated along the flow channel. The flow channel has a taper between the first pressure sensor and the second pressure sensor.
摘要:
The invention relates to a method and apparatus for analyzing fluid flow while considering heat transfer effects and, in particular, a phase change from a molten state to a solid state. In particular, the method and apparatus may be applied to the analysis of an injection molding process for producing a molded polymer component from a thermoplastic or a thermosetting polymer. In one embodiment, the method may be used to determine pressure required to fill a mold cavity and pressure gradients introduced during filling and packing of the cavity of an injection mold. The results of these analyses may be used to determine the number and location of gates, to determine the best material for the component, and to optimize the process conditions used in the molding process.
摘要:
A process of forming molded articles using an injection molding apparatus is provided. The process includes providing a thermoplastic material to the injection molding apparatus. The thermoplastic material is heated such that the thermoplastic material is in a molten state. The molten thermoplastic material is injected into at least one mold cavity of the injection molding apparatus using an injection element. Melt pressure of the thermoplastic material filling the at least one mold cavity is monitored using a sensor. The sensor provides a signal indicative of melt pressure to a controller. The controller controls introduction of a non-reactive additive to the thermoplastic material thereby changing a viscosity of the molten thermoplastic material based on the signal. A molded article is formed by reducing a mold temperature of the thermoplastic material within the at least one mold cavity.