JPH03253319A - Setting device of injection molder - Google Patents

Abstract

PURPOSE:To make it possible to select a plurality of setting patterns for respective stages in process so as to meet molding conditions and the requirements of an operator by a method wherein the wave mode selector, which selectively connects a plurality of function generators to an injection molder upon the receipt of signal sent from a setter and the number of stages recognition signal sent from setting signal, is provided. CONSTITUTION:When setting patterns, which are different from one another at every stage, are selected with a setter 7 by an operator, a wave mode selector 8 selectively turns on switches 10a, 10b,...10z which are different from one another at every stage, upon the receipt of the number of stages recognition signal (c). On the other hand, an injection speed setting signal generator 3 issues injection speed setting signal (a), which corresponds to molding conditions such as time, position and the like, so as to output to function generators 4a, 4b,...4z, resulting in connecting only the function generators of the switches 10a, 10b,...10z, which are selectively connected with the change in time and position, to an injection molder 1 and outputting injection speed command signal (b). Accordingly, not only a plurality of patterns can be selected in response to molding conditions and the requirements of the operator but also patterns, which are different from one another at every stage in process, can be selected.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a setting device for an injection molding machine.

(Prior Art) Conventionally, when setting the plasticizing operation such as the injection speed, holding pressure, screw rotation speed, and back pressure of an injection bottom type machine, the settings are set in one stage or in multiple stages. In this case, the set value is changed in steps (staircases) depending on set value changing conditions such as position and time.

On the other hand, there is currently a system that generates the above-mentioned operation settings using a function. However, in actual molding, the molding conditions vary depending on the type of mold, resin molding temperature, etc., and the operator also has to control molding accuracy, cycle accuracy, etc.
Find various things such as the life of the mold and the size of the average setting speed. Therefore, if set by a fixed function,
Only part of the molding conditions and operator requirements can be met.

FIG. 2 is a diagram showing the relationship between injection speed and time in the setting pattern of a conventional injection molding machine.

In the figure, the vertical axis represents injection speed, and the horizontal axis represents time. As shown in the figure, a setting pattern is generated using a staircase waveform as shown by a solid line, a -order function waveform as shown by a dotted line, an exponential function waveform as shown by a -dotted chain line, etc.
This is sent as an injection speed command signal to the injection molding machine for control.

(Problem B to be Solved by the Invention) However, in the setting device for an injection molding machine having the above configuration, the waveforms obtained differ depending on the molding state.

For example, when a smooth rise is required, a gradual exponential function waveform is required, and when a rapid rise is required, a staircase waveform or a linear function waveform is required.

Further, when setting is performed in a plurality of stages during each process, for example, when controlling by changing the setting signal as time passes, different waveforms are required for each stage.

However, in the above conventional setting device for an injection molding machine, the setting pattern cannot be changed, and all stages are set using a fixed setting pattern.

Therefore, when performing injection with a fixed setting pattern, the operator needs to set conditions that will provide the optimum settings in order to provide molding conditions that meet the requirements.

The present invention solves the problems of the conventional injection molding machine setting device described above, and provides an injection molding machine that is capable of selecting a plurality of setting patterns for each stage in the process according to the molding conditions and operator requirements. The purpose is to provide a configuration device.

(Means for Solving the Problems) For this purpose, in the injection molding machine setting device of the present invention, the injection molding machine and each injection molding process are divided into a plurality of stages.
It has a setting signal generator that generates a setting signal for each stage and also generates a stage number recognition signal. A plurality of function generators are connected between the setting signal generator and the injection molding machine.

Also, a setting device for selecting a setting pattern, and a waveform selector for selectively connecting the plurality of function generators to the injection molding machine in response to a signal from the setting device and a stage number recognition signal from the setting signal. is provided.

(Function) According to the present invention 52, as described above, the injection molding machine and each step of injection molding are divided into a plurality of stages, and a setting signal is generated for each stage, and a setting signal is generated that generates a stage number recognition signal. It has a container. A plurality of function generators are connected between the setting signal generator and the injection molding machine, and the setting signal generated by the setting signal generator is transmitted to the function generator in a different state for each stage during the process. is output to.

Also, a setting device for selecting a setting pattern, and a waveform selector for selectively connecting the plurality of function generators to the injection molding machine in response to a signal from the setting device and a stage number recognition signal from the setting signal. is provided. Therefore, when an operator inputs a signal waveform to be generated in each function generator, the waveform selector generates a signal for selecting a different waveform for each stage based on the stage number recognition signal from the setting signal generator.

Then, a function generator is selected based on the signal, and a command signal with a predetermined waveform is output to the injection molding machine.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a setting device for an injection molding machine according to the present invention.

Here, the case of setting the injection speed will be explained.

1 is an injection molding machine, and an injection speed setting signal generator 3 is provided in a controller 2 that operates the injection molding machine 1. The injection speed setting signal generator 3 receives a start signal and a switching signal (not shown) for each multi-stage injection speed step, generates a set injection speed setting signal a, and outputs a set injection speed setting signal a to the function generators 4a, 4b... 4z, and also generates a stage number recognition signal C and outputs it to a setting device 7, which will be described later. Usually, the injection speed setting signal is set differently as time passes and the screw position changes, so that the time or scroll during the process is divided into multiple stages. The injection speed setting signal a is set to a different value for each stage.

Further, the function generators 4a, 4b, . . . , 4z generate a step pattern, a -order function pattern, an exponential function pattern, a cycloid pattern, etc. in accordance with the amount of change in the injection speed setting signal a.

A setting device 7 is connected to the controller 2, and the operator can use the setting device 7 to input the various setting patterns to the function generators 4a, 4b, . . . 4Z. Then, the waveform selector 8 is connected to the controller 2.
It receives the signal from the setting device 7 and also receives the stage number recognition signal C from the injection speed setting signal generator 3.
receive.

On the other hand, switches 10a, 10b+...10 are installed between the function generators 4a, 4b,...4z and the injection molding machine 1.
z, and the waveform selector 8 receives the stage number recognition signal C.
In response to this, different switches 10a are installed for each stage in the process,
10b, . . . 10z can be selectively turned on.

The injection acid type Ill has switches 10a, 10b, . . . 1
Function generators 4a, 4 selectively connected by 0z
b, . . . 4z, and performs injection at the injection speed set by the set pattern.

Here, for example, if the function generator 4a is a generator that generates a staircase pattern, the function generator 4b is a generator that generates a linear function pattern, and the function generator 4c is a generator that generates an exponential pattern, different functions are generated for each stage during the process. Containers 4a, 4b,・
... 4z is selected, and a required pattern is selected from the above three types of patterns as time or position changes, and the bottom shape can be formed in a pattern that suits the molding state.

In the setting device for an injection molding machine having the above configuration, when the operator selects a different setting pattern for each stage using the setting device 7, the waveform selector 8 receives the stage number recognition signal C and switches a different setting pattern for each stage. 10a, 10b,...
・Selectively turn on 10z.

On the other hand, since the injection speed setting signal generator 2 generates the injection speed setting signal a corresponding to the molding state such as time or position and outputs it to the function generators 4a, 4b, . . . 4z,
With a change in time or position, only the function generators of the selectively connected switches lOa, 10b, . . . 10z are connected to the injection molding machine l, and an injection speed command signal is output.

Note that the present invention is not limited to the above embodiments,
Various modifications are possible based on the spirit of the present invention, and these are not excluded from the scope of the present invention.

For example, in this embodiment, the case where the injection speed is set is explained, but the setting pattern can be similarly selected when setting the screw rotation speed, back pressure, etc.

(Effects of the Invention As explained in detail above, in the setting pattern of the injection molding machine of the present invention, the injection molding machine and each injection molding process are divided into a plurality of stages, and the settings are set for each stage.) It has a setting signal generator that generates a signal and a stage number recognition signal. A plurality of function generators are connected between the setting signal generator and the injection bottom type machine.

Also, a setting device for selecting a setting pattern, and a waveform selector for selectively connecting the plurality of function generators to the injection molding machine in response to a signal from the setting device and a stage number recognition signal from the setting signal. is provided.

Therefore, not only can a plurality of patterns be selected depending on the condition of the bottom shape and the operator's requirements, but also a different pattern can be selected for each stage in the process.

Therefore, it is possible not only to improve the precision of the molded product, prevent the occurrence of flashing, and protect the mold, but also to adapt to the bottom shapes of thin and thick products.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of a setting device for an injection molding machine according to the present invention, and FIG. 2 is a diagram showing the relationship between setting speed and time in a setting pattern for a conventional injection molding machine. 1... Injection molding machine, 2... Controller, 3...
Injection speed setting signal generator, 4a, 4b,...4Z・
...Function generator, 7...Setting device, 8...Waveform selector, IOa, Job, ...102...Switch.

Claims (1)

[Claims] (a) An injection molding machine; (b) A setting signal generator that divides each injection molding process into a plurality of stages and generates a setting signal for each stage and also generates a stage number recognition signal. (c) a plurality of function generators connected between the setting signal generator and the injection molding machine; (d) a setting device for selecting a setting pattern; (e)
A setting device for an injection molding machine, comprising a waveform selector that selectively connects the plurality of function generators to the injection molding machine in response to a signal from the setting device and a stage number recognition signal from the setting signal. .