Boots – shoes – and leggings
Patent
1988-05-11
1989-02-14
MacDonald, Allen
Boots, shoes, and leggings
364191, B29C 4576
Patent
active
048051128
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a method for setting various operating conditions of an injection molding machine.
2. Description of the Related Art
In an injection molding machine, various operating conditions, which accompany an injection molding process, such as a mold opening limit position, a mold contact position, a mold moving speed, a position for changing the mold moving speed, an eject start position, a core set position, a core pulling position, an injection speed, and a switch position for the injection speed must be set. Conventional injection molding machines control this injection molding process by a program describing set values of these operating conditions. Therefore, when these conditions are changed, the program itself must be altered, and a new program must be created.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a method of setting operating conditions for an injection molding machine. Such a method can variably set various operating conditions of the injection molding operations simply by changing a mold moving or injection speed, or a switching position thereof without creating a new molding numerical control (NC) unit program, provided that the patterns of the injection molding operations, such as mold clamping and injection processes, are the same, i.e., that the number of switching stages of the mold moving speed for mold clamping or the number of switching stages of the injection speed for the injection is the same.
In order to achieve the above object, according to the present invention, the injection moding machine is controlled by numerical control unit. A numerical control program used for controlling the injection molding operation of the injection molding machine is created for the various operating conditions using macro parameters.
Memory areas corresponding to the macro parameters are respectively predetermined. Meanwhile, values of the operating conditions are set for corresponding macro parameters. The set values of the operating conditions are respectively stored in the memory areas assigned to the corresponding macro parameters.
With this method, the set values of various operating conditions for the respective operations during injection molding can be arbitrarily input to correspond to macro parameters. During operation of the injection molding machine, when a macro parameter in an NC program is read, the corresponding set data is read out and a predetermined injection molding operation is executed in according with the readout data.
In this manner, according to the present invention, the set values of the various operating conditions in the injection molding process can be arbitrarily changed provided that the operating patterns of the injection molding process are the same. Therefore, unlike in a conventional system, since the program itself need not be altered every time the various operating conditions of the injection molding process are changed, an economical effect can be obtained. In addition, an optimum injection molding operating condition can be selected in accordance with the mold or the molding material to be used.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is a block circuit diagram of a control section of an injection molding machine showing an embodiment of the present invention; and
FIG. 2 shows an example of a display screen of a display unit which an operating condition to be set is selected.
DESCRIPTION OF THE PREFERRED EMBODIMENT
FIG. 1 shows a control section of an injection molding machine. In FIG. 1, reference numeral 1 denotes a computerized numerical controller (to be referred to as a CNC hereinafter) which constitutes the control section; 2 refers to a central processing unit (to be referred to as a CPU hereinafter); 3 refers to a ROM, which stores a a control program for the entire injection molding machine; 4 refers to a non-volatile pattern-storing memory which stores an NC program for executing a predetermined injection molding operation, e.g.
REFERENCES:
patent: 4674053 (1987-06-01), Bannai et al.
Fanuc Ltd.
MacDonald Allen
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