In an injection molding machine, a predetermined torque limit value set in advance and acceleration/deceleration torque calculated by an acceleration/deceleration torque calculation section are added to set an output torque limit value for a motor. By this operation, quick acceleration or deceleration can be achieved in an injection process, and breakage of a mold and mechanism section of the injection molding machine can be prevented.

A time variation of an internal pressure of the molding cavity of a multi-phase injection molding machine is detected and represented as an internal pressure graph. An internal pressure graph recorded during a production cycle that produced an injection molded part satisfying a predefined quality characteristic is used as a reference graph. If the internal pressure graph of the current production cycle exceeds a predefined threshold value, then a current machine parameter is changed so as to adapt an internal pressure graph of a subsequent production cycle to the reference graph. Each phase of the production cycle is assigned its own machine parameter determined to have a significant impact on the quality of the parts produced. The assigned machine parameters are changed in a predefined order in a plurality of production cycles wherein exactly one assigned machine parameter is changed per production cycle.

A controller for an injection molding system is in communication with a melt flow control unit, a gas assist control unit, and a gas counter pressure control unit. The controller can effect real-time adjustments to gas assist pressure and/or gas counter pressure as a function of melt pressure or flow front position.

An injection molding machine uses a controller to effectively control its operation. The controller may determine and/or receive information regarding the machine's maximum load capacity, and may also determine a current operational load value of the machine. The controller may cause the machine to operate at any number of combinations of settings of operational parameters which result in the machine operating at or below the maximum load value by adjusting any number of machine parameters associated with the injection molding machine based on feedback sensors measuring real-time operating conditions of the machine.

In a method for determining at least part of a path (12) for connecting at least one starting point (14) to at least one finishing point (16) in a space (R) for at least one autonavigation of at least one movable component through the space on a machine (100), at least one model of the movable component and the machine is provided, information on the geometry is gathered, current positions are determined and these are brought into relation with one another to create a graph (10). An algorithm is used to calculate the path (12), collision-free autonavigation along the path (12) being carried out after a collision check has been performed. This assists the operator in adapting the machine cycle, while likewise bringing about an improvement in terms of the travel path, cycle time, reliability of the process, energy and wear.

A display device of an injection molding machine includes a circuit configured to display a guidance screen that assists in providing conditions of an injection process. The injection process sequentially includes a filling process of controlling a travel speed of an injection member, a stopping process of stopping travel of the injection member, and a dwelling process of controlling a pressure applied from the injection member to a molding material. The guidance screen includes a first input field configured to receive an input of conditions upon completion of the filling process in a first test molding. In the first test molding, the filling process is performed under the conditions input to the first input field and subsequently the stopping process is performed, and then the dwelling process is performed under conditions that enable confirming a forward flow end position of the molding material upon completion of the stopping process.

With respect to a controller of an injection molding machine, the injection molding machine includes an injection member provided inside a cylinder to heat a molding material and an injection drive source to fill the molding material into a mold device by moving the injection member forward. The controller includes a limiting part that limits a movement of the injection member forward in a pressure-holding process of controlling an injection drive source so that an actual value of a filling pressure acting on the molding material from the injection member becomes a set value, and a determining part that determines an appropriateness of a setting to be used by the limiting part based on information of a sensor provided in the mold device.