JPS5948744B2 - Mold for injection molding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an injection mold having an identification member.

Unmanned automatic operation of injection molding machines has been practiced for a long time, and especially when producing a wide variety of molded products in small quantities, the number of times automatic operation must be stopped and molds replaced is lower than when producing in large quantities. many.

For this reason, semi-automatic mold changing devices, one-touch mold changing devices, etc. are used.

On the other hand, there is also a method in which molding conditions are set one-touch or automatically using an automatic storage device after mold replacement.

However, the identity of the mold is confirmed by the operator.

In addition, in production using different types of molds, automatic mold exchange equipment, automatic conveyance equipment, automatic storage equipment, and centralized IjllX
] This is done using equipment, etc.

In this case, a storage location for each mold is determined, and the molds required for molding are automatically taken out from the storage location, attached to the injection molding machine, and returned to the original storage location after use.

Therefore, once the storage location is designated, the molds necessary for molding will be automatically taken out.

In such a method, it is absolutely necessary to place the mold in a designated storage location, and if this is done incorrectly, not only will molding not be possible, but it may also cause a malfunction.

Furthermore, in order to store the molds in the designated locations without errors, the operator must be very attentive.

Furthermore, the capacity of the automatic mold storage is low compared to the number of molds held, and if the number is insufficient, it becomes necessary to replace and store used molds with unused molds, and in this case, the control device The changes must be corrected.

There must always be a one-to-one relationship between the mold and the mold storage location, and manual confirmation is required to ensure this is done correctly.

All of the above drawbacks are due to the fact that there is no means to identify each of the plurality of molds, and the molds are confirmed based on the storage location.

Therefore, the inventor of the present invention has discovered that each mold is provided with a mold-specific identification member, and this identification member is automatically detected to prevent misidentification.

Accordingly, the present invention is characterized in that the identification member includes a label that can be easily attached to a desired location of the mold and that can be easily detected by magnetic or optical means.

In a mold having the above-mentioned label as an identification member, the unique identification of the mold is detected magnetically or optically at the storage location or when set in an automatic conveyance device or injection molding machine, and the mold is confirmation will be done automatically.

As a result, mistakes in the storage location of molds are prevented, and mounting of molds other than those specified is also prevented, making it possible to always replace molds reliably.

The present invention will be explained in detail below using illustrated examples.

In the figure, reference numeral 11 denotes a mold, which is constructed by fixing a pair of split molds 11a and 11b to a fixed side mounting surface 12 and a movable side mold mounting plate 1, respectively.

Reference numeral 14 denotes a label identification member made of magnetic tape or optically identifiable material, which is attached to a predetermined location on the fixed side mold mounting plate 12.

A thin plate of paper, aluminum or its alloy, plastic, metal, or the like can be used as the base material of the identification member 14, and an identification mark 14a is placed on the base material.

The mark 14a may be a number as shown in FIG. 3, and it is preferable that the ground color of the base material and the color of the mark 14a have a clear difference in brightness.

Also in this case, the numbers 1°2.4, 8 can be used as mold identification numbers, and the letter A can be used for mold positioning.

Note that the identification detection device in this case uses a character reading device.

Figures 4 and 5 show examples of the identification member 14 when using a photoelectric switch equipped with a light projector and a light receiver. Apply anti-reflective paint and place multiple signs on it.
4a is made of a material that is easily reflective.

Further, in FIG. 5, holes are made in the substrate as necessary, and the hole portions are used as markers 14a.

Therefore, in this case, identification is made by the non-reflective portion.

Figure 6 shows a case in which identification and detection of the mold 11 is performed using a photoelectric method.
This is an example, and the light projector 16 that the identification detection device 15 has
Light is projected onto the identification member 14, the light reflected by the identification member 14 is incident on the photoelectric element 17, and the light sensed by the photoelectric element 17 is converted into an electrical signal.

The electrical signal is transmitted to transcoding device 18 .

Further, this will be explained using the identification member 14 in FIG. 4 as an example.

When the marks 1 and 5 are used for positioning the mold, the marks are detected by the detection device and the position of the mold is determined.

Furthermore, if the markers 2, 3, and 4 are used to identify the mold 11, since the portion of the marker 3 does not reflect, the sensing by the photoelectric element 17 of the detection device is the marker 2°4, and the number of the mold 11 is detected from the marker. The number is identified, and the conditions for molding with that mold are set.

The above indicator can also be used as a binary code.

In this case, a 3-bit identification code is constructed, resulting in eight types of codes.

That is, by making it possible to sort eight types of molds, it is also easy to convert them into decimal numbers that are easy for operators to distinguish, if necessary.

For example, when indicators 2 and 4 are ON and indicator 3 is OFF, the value is 101 in binary and 5 in decimal.

7 and 8 show the case where detection is performed when the mold 11 is installed in the mold clamping device of an injection molding machine. Detection is performed automatically.

As described above, this invention provides magnetically or optically detectable labels at required locations on a mold as an identification member unique to the mold, and identifies the mold by detecting this identification member. Therefore, there is no misidentification when replacing the mold, and the mold can always be mounted reliably.

In addition, since the identification member consists of a label, it is easy to attach to the mold.
It has the advantage of being able to be used regardless of the mold structure.

[Brief explanation of drawings]

The drawings illustrate a mold for an injection molding machine according to the present invention, and FIG. 1 is a side view of the mold, FIG. 2 is a front view thereof, and FIG.
5 is a front view of each embodiment of the identification member, FIG. 6 is a plan view showing a detection example, FIG. 7 is a partial side view of the injection molding machine, and FIG. 8 is a longitudinal sectional front view thereof. . 11...Mold, 14...Identification member, 1
4a...Temma

Claims (1)

[Claims] 1. A mold for an injection molding machine, characterized in that the mold is provided with a magnetically or optically detectable label at a predetermined position on the mold as an identification member unique to the mold.