The present disclosure relates to machines and methods for reaction injection molding. In particular, the present disclosure provides small format reaction injection molding machines having exchangeable molds and reactant material tanks, as well as molds configured for use therein and associated componentry. In one example, a reaction injection molding machine can include a housing, at least one reactant materials tank engagement station in operational engagement with a first reactant material tank, a molding support framework, an injection molding manifold, and an injection molding nozzle engagement station.

A control device for an injection molding machine is equipped with a pressure acquisition unit that acquires a pressure of a resin inside a cylinder, a reverse rotation control unit that causes a screw to be rotated in reverse based on a predetermined reverse rotation condition so as to reduce the resin pressure after having moved the screw rearward to a metering position, a compensation amount calculation unit that calculates a compensation amount to be made with respect to the reverse rotation condition, based on the resin pressure inside the cylinder acquired by the pressure acquisition unit when the reverse rotation of the screw is stopped, and a predetermined compensation function, and a compensation processing unit configured to compensate the reverse rotation condition based on the compensation amount calculated by the compensation amount calculation unit.

Provided are a basic data input unit to input basic data including molding conditions data related to molding conditions and screw data related to the form of the screw; a calculation formula data setting unit to set solid phase rate calculation formula data to calculate the solid phase rate of the molten resin in a heating cylinder based on this basic data; a calculation processing function unit having a solid phase rate calculation processing unit to use calculation processing based on the basic data and the solid phase rate calculation formula data to calculate an estimated solid phase rate of the molten resin at the measurement completion; and an output processing function unit that performs display processing to display information related to the estimated solid phase rate on a display.

A plasticizing device includes a passage defining section that is coupled to a hopper which stores a material and that defines a supply passage to which the material is supplied from the hopper, a plasticizing section that includes an introduction portion which communicates with the supply passage, and a screw, and that plasticizes the material supplied from the introduction portion by rotation of the screw to form a molten material, and a material detection section that detects the presence or absence of the material in the supply passage.

Provided are a basic data input unit to input basic data including molding conditions data related to molding conditions and screw data related to the form of the screw; a calculation formula data setting unit to set solid phase rate calculation formula data to calculate the solid phase rate of the molten resin in a heating cylinder based on this basic data; a calculation processing function unit having a solid phase rate calculation processing unit to use calculation processing based on the basic data and the solid phase rate calculation formula data to calculate an estimated solid phase rate of the molten resin at the measurement completion; and an output processing function unit that performs display processing to display information related to the estimated solid phase rate on a display.

A conveying device for conveying a viscous material from a container includes a follower plate that can be inserted into the container, and a pump by means of which the viscous material can be conveyed through the follower plate. Moreover, a measuring chamber for accommodation of a measuring sample of the viscous material is provided. The measuring chamber includes a closable material inlet opening for this purpose. A closable disposal line leads away from the measuring chamber. Moreover, a closable material return line extends from the measuring chamber via the follower plate into the container. The conveying device also includes a controller that is designed and can be operated appropriately such that it determines the compressibility of each of multiple measuring samples. The controller opens the disposal line or the material return line to the measuring sample present in the measuring chamber as a function of the compressibility thus determined.

The present disclosure relates to machines and methods for reaction injection molding. In particular, the present disclosure provides small format reaction injection molding machines having exchangeable molds and reactant material tanks, as well as molds configured for use therein and associated componentry.

The present disclosure relates to machines and methods for reaction injection molding. In particular, the present disclosure provides small format reaction injection molding machines having exchangeable molds and reactant material tanks, as well as molds configured for use therein and associated componentry.

A plasticizing device includes: a material storage unit having a charging port and configured to store pellet-shaped resin pellets; a plasticizing unit having a supply port in communication with the charging port and configured to plasticize at least a part of the resin pellets to generate a shaping material; a coupling pipe having a coupling path coupling the charging port and the supply port; a first material sensor configured to detect a remaining quantity of the resin pellets in the coupling path; and a control unit. The material storage unit includes a material supply mechanism configured to supply the resin pellets to the coupling path, and when the remaining quantity of the resin pellets detected by the first material sensor is less than a first reference value, the control unit controls the material supply mechanism to supply a predetermined quantity of the resin pellets to the coupling path.

The present disclosure relates to machines and methods for reaction injection molding. In particular, the present disclosure provides small format reaction injection molding machines having exchangeable molds and reactant material tanks, as well as molds configured for use therein and associated componentry.