Step time display device for injection molding machine

Abstract

A step time display device for an injection molding machine selects two events (a time measurement start event and a time measurement end event), time of each of which is to be measured, from among a plurality of events (starts and ends of mold clamping, injection, holding pressure, metering, mold opening, and ejection steps) in one molding cycle of an injection molding machine, and detects and stores occurrence time of each of the selected events. The step time display device calculates a time interval between the two events based on the occurrence time of each of the two stored events, and displays the calculated time interval on a screen.

Description

technical field [0001] The present invention relates to a process time display device of an injection molding machine for measuring and displaying the operation time of each operation process of the injection molding machine and used for the management of the molding process. Background technique [0002] The operation process of the injection molding machine can be roughly divided into each process of mold clamping, injection, pressure holding, metering, mold opening, and molded product ejection. Users analyze the time of these processes to evaluate the stability of the molding process, or conduct research on shortening the molding cycle. [0003] The measurement and display method of the operation time in the operation process of the injection molding machine is generally as follows: Figure 9 As shown, the operation time of each process is measured and displayed. [0004] For example, as described in JP-A-11-179520, there is used a method of measuring and displaying the ...

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Problems solved by technology

[0007] However, the prior art has the following problems: In recent molding, in order to shorten the cycle time, injection during mold closing, mold opening during measurement, ejection during mold opening, or ejection during mold closing, etc. With the increase of complex actions, the existing measurement methods for each process cannot measure the necessary appropriate time such as the execution time of complex actions, the time to start complex actions, and the cumulative execution time including complex actions.

[0008] For example, when injection is started in the mold clamping process, from the viewpoint of cycle time, the time from the start of mold clamping to the start of injection is more important, and the time of the entire mold clamping process is meaningless

In addition, from the point of view of molding quality, the time from the start of injection to the complete closing of the mold is more important due to the problem of outgassing between the molds during mold clamping, and the time of the entire mold clamping process is also meaningless

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