JP3615505B2 - Mold identification method by molding machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method of identifying a mold when a plurality of different molds are exchanged to perform resin injection molding.
[0002]
[Problems to be solved by the invention]
In resin injection molding, a plurality of dies having different molding conditions are exchanged for use in one injection molding machine. For this reason, when using each mold, it is necessary to change the molding conditions for each mold, for example, mold opening stop position, ejector advance limit position, heating cylinder temperature, injection speed, holding pressure, injection filling amount and cooling time. There is.
[0003]
The molding condition is changed by identifying the mold when the mold is mounted on the fixed platen and the movable platen included in the molding machine. This identification may be automatically performed in addition to visually confirming the name or number given to the mold by the worker.
As this automatic identification means, a system is adopted in which a unique marker such as a barcode is confirmed for each mold by a detector provided on the molding machine side when the mold is mounted.
[0004]
Among these automatic identification means, the selection by the detector is expensive because it is necessary to attach the identification member and the detector to a specific place on both the molding machine side and the mold, and the normal mold without the identification member is Since it cannot be identified, the cost of the mold increases. Further, the identification by the bar code has a problem that the bar code is easily contaminated or damaged due to the use of the mold many times, and the identification mark function is easily lost.
[0005]
The present invention has been conceived in order to solve the above-described problems of the conventional identification means, and its purpose is to adopt a special sorting means by adopting the mold thickness dimension for each mold as the mold identification means. It is an object of the present invention to provide a mold identification method using a new molding machine that can identify a normal mold by moving a movable platen and provide selection of molding conditions for the mold input to the molding machine.
[0006]
[Means for Solving the Problems]
According to the above-mentioned object, the present invention inputs a molding condition and a mold thickness dimension for each of a plurality of dies into a molding storage device provided in the molding machine in advance, and the fixed plate and the movable plate of the mold clamping device of the molding machine. When the mold is mounted, the mold clamping operation is performed by moving the movable platen in the mold attachment work mode, and the mold thickness dimension of the mounted mold is detected from the amount of movement of the movable platen. The mold is identified by collating with the mold thickness dimension for each mold input to, and molding is performed by selectively setting the molding conditions of the identified mold.
[0007]
In addition, the present invention inputs a molding condition, a mold thickness dimension, a molding condition name or a mold name for each of a plurality of molds into a storage device of the molding machine, and a mold thickness dimension detected from a moving amount of the movable platen. When there are multiple identical or approximate mold thickness dimensions, the molding condition name or mold name of the corresponding mold is displayed, and the operator identifies the mold based on the display. is there.
[0008]
The molding machine is an injection molding machine equipped with a clamping device using a hydraulic drive or an electric motor such as an electric servo motor as a drive source, and the moving amount of the movable plate is in the hydraulic drive clamping device. Is a position detector provided between the movable platen and the fixed part on the machine base, and in a toggle type mold clamping device using an electric motor such as a servo motor as a drive source, the fixed part on the machine base side It can be obtained by calculation from the detected values of the position detector provided over the encoder or the encoder of the toggle drive motor and the position detector of the pressure platen.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
In the figure, reference numeral 1 denotes a mold clamping device installed on a machine base 2 of an injection molding machine. A pair of fixed plates 3 and 4 are connected to each other by connecting tie bars 5 and 5 at four corners. The movable plate 6 inserted and supported is connected to a piston rod 8 of a hydraulic cylinder 7 fixed to one fixed plate 3 so as to be able to move forward and backward with respect to the other fixed plate 4, and the fixed plate 4 and the movable plate 6 are opposed to each other. It consists of a hydraulically operated mold clamping device in which a mold 9 is divided and attached to the surface.
[0010]
The molding storage device 10 provided in the injection molding machine has a plurality of molds A and B having different mold thickness dimensions, molds C1 and C2 having the same mold thickness dimension and different molding conditions, and a difference in mold thickness dimension. The molding conditions and mold thickness dimensions of a plurality of molds such as molds F1 and F2 that are slightly approximated are input in advance for each mold. At this time, the mold thickness dimension is slightly different depending on the environment such as temperature, molding machine, operator, etc., so the allowable thickness dimension is set.
[0011]
Moreover, since the identification of the mounting mold 9 is based on the mold thickness dimension, all of the molds C1 and C2 having the same mold thickness dimension are simultaneously confirmed, and all of the molds F1 and F2 having approximate mold thickness dimensions are simultaneously confirmed. Therefore, a molding condition name and a mold name are added and input as means for identifying the confirmed molding condition of the mold. Thus, when a plurality of molds are applicable, the molding condition name and mold name of the target mold are displayed on the monitor 11, and the operator can check the mold and select the molding conditions from the display. It is like that. In addition, the collation can be confirmed by an input of the switch 12 by an operator, and the molding conditions of the mold thus identified are set in the molding machine.
[0012]
Note that a storage medium outside the molding machine may be used for management of the molding conditions, and the molding conditions of the mold that are not input to the storage device 10 can be identified by moving from the storage medium. It is.
[0013]
Next, identification and verification of a mold that has been discontinued (hereinafter referred to as a production end mold) and a mold that is mounted for the next production (hereinafter referred to as a mounting mold) will be described.
First, the conditions of the production end mold are confirmed, and if necessary, the molding conditions including the mold thickness dimensions are reviewed and re-registered (revised).
[0014]
Next, the mold lock on the movable platen 6 side is released in the mold closed state, and the movable platen 6 is moved backward to a place where the production-finished molds are not detached from the receiving members on the lower side of both plates, and the fixed platen 4 and the movable platen. 6 to secure a mold take-out space d. Thereafter, the mold lock on the fixed platen 4 side is released, and the production-finished mold is taken out from between the two boards to the outside of the molding machine.
[0015]
In order to attach a die 9 to be installed for the next production (hereinafter referred to as a “mounting die”) between the two boards after the production end mold is removed, an installation space corresponding to the mounting die 9 is usually required. As is done, it is secured by moving the movable platen 6. Next, the mounting die 9 is fed into the mounting space along the mold surface of the fixed platen 4 from above or from the side, and is placed on the receiving member on the lower side of both plates. In this state, the switch 12 is turned on for condition verification, the mold mounting operation mode is turned on, and the movable platen 6 in the retracted position is clamped.
[0016]
As a result, the movable platen 6 moves at a low speed in the space d between the movable mold 6 and the movable mold 6, and then, the movable mold 6 is clamped at a low pressure and further strongly clamped. The mold thickness dimension of the mounting mold 9 is electrically calculated and detected from the moving amount of the movable platen 6 during the strong mold clamping, and the mold thickness dimension and a plurality of molds A, B, C1 inputted to the molding machine side are detected. , C2, F1, and F2 are automatically collated with each other for identification. When the mold A is identified, its molding conditions are set and displayed on the monitor 11.
[0017]
If there are molds C1 and C2 or similar molds F1 and F2 having the same mold thickness as a result of collation, the molding condition name or mold name of each mold is displayed on the monitor 11 as a candidate. Is done. An operator selects the molding conditions of the mounting die 9 from the display. Finally, collation is confirmed by input of a confirmation signal by the worker to complete the identification, and the selected molding conditions are set in the molding control device of the molding machine. When the work mode is switched to the molding work mode, the mold is not identified by the movement of the movable platen 6, and the resin is molded by injection under the selected molding conditions.
[0018]
In this way, when detecting the mold thickness dimension of the mounting mold from the moving amount of the movable platen, and then identifying the mounting mold and selecting the molding conditions, both the mold and the molding machine side as before. Since there is no need to provide an identification means, it is possible to use a normal mold as it is. Means for detecting the amount of movement of the board by converting it into a mold thickness dimension is usually employed, and the position detector can be used, so that the cost is low.
[0019]
The illustrated embodiment describes a hydraulically driven mold clamping device. However, in the case of a mold clamping device using an electric motor as a drive source, the amount of movement of the movable platen is detected from the number of revolutions of the electric motor. Similarly, since the thickness of the mounting mold can be detected and collated, the present invention can be applied in a wide range regardless of the drive source.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an explanatory diagram showing a state when a mold is exchanged in a mold identification method by a molding machine of the present invention.
FIG. 2 is an explanatory view showing a state after the same mold replacement.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Clamping device 2 Machine stand 3 Fixed platen 4 Fixed platen 5 Tie bar 6 Movable platen 9 Mold 10 Storage device 11 Monitor 12 Switch

Claims (2)

When the molding conditions and mold thickness dimensions for each of a plurality of molds are input to a molding storage device provided in the molding machine in advance, and the mold is mounted on the fixed platen and the movable platen of the mold clamping device of the molding machine. The mold clamping operation is performed by moving the movable platen in the mold attachment work mode, the mold thickness dimension of the mounting mold is detected from the amount of movement of the movable platen, and the mold thickness dimension and each mold input to the molding machine are detected. A mold identification method using a molding machine, characterized in that a mold is identified by collating with a mold thickness dimension, and molding is performed by selectively setting molding conditions of the identified mold. A molding condition, a mold thickness dimension and a molding condition name or a mold name for each of a plurality of molds are input to the storage device of the molding machine, and a mold that is the same as or approximate to the mold thickness dimension detected from the moving amount of the movable platen. 2. When there are a plurality of thickness dimensions, a molding condition name or a mold name of the corresponding mold is displayed, and an operator judges from the display to identify the mold. Mold identification method by the molding machine.

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