JPH1016022A - Injection molding method - Google Patents

Abstract

(57) [Problem] To provide an injection molding method capable of reliably removing a molded product from a mold and inserting an insert such as a metal fitting. SOLUTION: A non-contact type displacement sensor 7 for detecting a stop position of the movable mold 3 is provided near a movable mold 3 of an injection molding machine 1, and a signal from the sensor is used to control a molded product removal device 4 or an insert device. Correct the movement position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection molding method, and more particularly, to a molded product removal device for removing molded products from a mold of an injection molding machine, and an insert such as a metal fitting inserted into the mold. The present invention relates to a method for controlling an operating position of an insert device to be operated.

[0002]

2. Description of the Related Art Conventionally, various devices have been proposed and put into practical use for taking out a molded product as a product from a mold of an injection molding machine. In addition, with the recent development of control devices and the like, the functions and accuracy of these take-out devices have also been remarkably improved.

[0003] However, although the high precision of the molded product take-out device has been achieved, considering the final purpose of taking out the molded product, it is not sufficient to improve the precision of the molded product take-out device alone. In addition, it is necessary to improve the precision of both the molded product take-out device and the molding machine.

However, most of the stop positions of the mold of the molding machine are ultimately performed by switching the hydraulic circuit, so that the stop position of the molded product take-out device is considerably inferior to the accuracy of the stop position. Do. For this reason, in many cases, the structure of the hand portion of the molded product take-out device is devised to absorb variations in the stop positions of the molding machine dies.

[0005]

However, by simply devising the structure of the hand portion, variations in the stop position of the molding machine die cannot be completely absorbed, and the product may drop or remain in the die. The removal mistake could not be completely prevented. Further, in the worst case, a collision between the unloading device and the mold may occur.

[0006] Also, when various metal fittings and the like are inserted into a mold by insert molding or the like, it is necessary to strictly manage the positional relationship between the stop position of the mold and the insert device.

Accordingly, an object of the present invention is to provide an injection molding method capable of reliably removing a molded product from a mold and inserting an insert such as a metal fitting.

[0008]

In order to achieve the above-mentioned object, according to the injection molding method of the present invention, a non-contact type displacement sensor for detecting a stop position of a mold is provided near a mold of an injection molding machine. The moving position of the molded product take-out device or the insert device is corrected by a signal from the sensor.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the drawings. FIG. 1 is a block diagram showing an example of the injection molding method of the present invention, and shows a method of taking out a molded product from a mold of an injection molding machine by using a molded product removal device.

First, an injection molding machine 1 is provided with an injection mold having a fixed mold 2 and a movable mold 3. A molded product take-out device 4 includes a hand section 5 for taking a molded product and a molded product take-out device. And a control device 6 for controlling the movement position of the control unit 4. A non-contact type displacement sensor 7 is provided near the stop position of the movable mold 3, and the displacement sensor 7 is connected to the control device 6 of the molded product take-out device 4 via a calculation device 8. ing.

As the displacement sensor 7, various types can be used. For example, a laser beam A is emitted from the light emitting section 7a in a belt shape, and an object located between the light emitting section 7b and the light receiving section 7b emits the laser beam A. A laser displacement sensor whose output signal changes in accordance with the amount of interruption can be used. Such a displacement sensor 7 is mounted on the gantry of the injection molding machine 1 such that the movable mold 3 is located between the light emitting unit 7a and the light receiving unit 7b near the stop position of the movable mold 3 when the mold is opened. Install at a fixed point such as

When the mold is opened after the injection molding is completed, the movable mold 3 stops at a position where the laser beam A is interrupted to some extent, and the displacement sensor 7 outputs a signal corresponding to the stop position of the movable mold 3 to the arithmetic unit. 8 is output. The arithmetic unit 8 calculates the amount of movement of the molded product take-out device 4 based on this signal, and outputs the result to the control device 6 of the molded product take-out device 4. Thereby, the molded product removal device 4 can always be moved to a position corresponding to the stop position of the mold, so that the molded product can be removed by the hand portion 5 at an optimum position, and the inside of the mold can be removed. Can be taken out of the product without fail.

[0013] Since a molded product removal apparatus that has been conventionally used for this type of apparatus can be used as it is, a detailed description thereof will be omitted. In addition, the present invention is not limited to the removal of a molded product from the mold, but can be similarly applied to the case where something other than resin is inserted into the mold in insert molding or the like. Can be reliably inserted into a predetermined position in the mold.

[0014]

As described above, according to the injection molding method of the present invention, it is possible to reliably remove a molded product and insert an insert, thereby improving productivity and molding accuracy.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of the injection molding method of the present invention.

[Description of Signs] 1 ... Injection molding machine, 2 ... Fixed mold, 3 ... Movable mold, 4 ... Moulded product take-out device, 5 ... Hand unit, 6 ... Control device, 7 ... Displacement sensor, 7a ... Light emitting unit, 7b ... Light receiving unit, 8 ... arithmetic unit, A ...
Laser light

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location B29C 45/64 B29C 45/64 // B29K 105: 22

Claims (1)

[Claims] 1. A non-contact type displacement sensor for detecting a stop position of a mold is provided in the vicinity of a mold of an injection molding machine, and a movement position of a molded product removal device or an insert device is corrected by a signal from the sensor. Injection molding method.