JPH06297499A - Apparatus and method for inspecting component shape - Google Patents

Abstract

PURPOSE:To prevent a component from being mounted which has an abnormal shape for causing damage of a mold in a mold insert molding machine for molding resin around the component by feeding a hoop material having the component into the mold. CONSTITUTION:The apparatus for inspecting a component shape comprises an imaging optical unit 4 arranged near a hoop material 2 to sequentially output an image signal including an inspecting region, a malfunction detecting unit 4 for processing an output signal of the unit 4 to detect a component 21 having an abnormal shape, a marking mechanism 6 for forming a mark 24 on the material 2 when the component 21 having the abnormal shape is detected, and a mark detecting mechanism 7 added to a gripping mechanism 3 to detect the mark 24 from the material 2. When the mechanism 7 detects the mark 24, it controls the mechanism 3 to remove the corresponding component 21 from a prescribed position of the mold 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insert molding apparatus for feeding a hoop material including a part into a mold to mold a resin around the part, and particularly to an abnormal shape which causes damage to the mold. The present invention relates to a component shape inspection device that detects a component and prevents the component from being attached to a mold.

In small electromagnetic relays, switches and the like, metal parts such as terminals are often insert-molded when the resin part is formed. When such metal parts are fed into the mold, the grooves formed in the mold are formed. Etc., and is supported at a predetermined position.

However, the metal parts for insert molding are formed on the hoop material to enable continuous supply to the molding die, and when deformed parts are mixed, the groove provided in the molding die. The mold die is destroyed when it is closed because it is not inserted into.

Therefore, there is a demand for the development of a component shape inspection device which prevents the abnormal shape of a component that causes die damage from being attached to the die.

[0005]

2. Description of the Related Art FIG. 6 is a principle diagram showing the structure of a conventional insert molding apparatus. The conventional insert molding apparatus operates as shown in FIG. 6 (a) by automatically opening and closing to perform insert molding, and the molding die 1 operates in synchronism with the operation cycle of the molding die 1 to form a hoop material. Two
It is equipped with a grip mechanism 3 for feeding.

The hoop material 2 before molding, which is wound around the reel 31 for feeding, is appropriately fed in accordance with the operation of the grip mechanism 3, insert-molded, and the hoop material 2 intermittently discharged from the molding die 1. Is appropriately wound on the winding reel 32.

As shown in FIG. 6 (b), parts 21 made of metal such as insert-molded terminals are formed on the hoop material 2 at predetermined intervals, and the hoop material 2 is provided between both side end parts and the part 21.
Is formed at a predetermined position of the molding die 1.

On the other hand, the molding die 1 is provided with a support groove 11 for supporting the component 21 at a predetermined position and a cavity 12 into which the resin 23 is injected, and the hoop material 2 is provided outside the support groove 11 and the cavity 12. A plurality of pilot pins 13 into which the pilot holes 22 are fitted are implanted.

Pilot hole 22 of the fed hoop material 2
The component 21 is fitted into the support groove 11 by inserting the resin into the pilot pin 13, and when the mold 1 is closed and molten resin is injected into the cavity 12, the resin 23 is molded around the component 21 as shown in the figure. It

It should be noted that, in order to simplify the drawing, it is illustrated that one component 21 is supplied to the molding die 1 and insert-molded, but if the component 21 is small, the hoop material 2 in the length direction and the width direction. There is a case where a plurality of components 21 arranged in the above are simultaneously insert-molded.

[0011]

As described above, the parts are positioned by inserting the pilot holes of the hoop material into the pilot pins of the molding die, but the parts formed on the relatively soft hoop material are processed. When it comes into contact with other members during storage or storage, it deforms and becomes an abnormally shaped part.

When an abnormal component having such a shape is fed, a positional deviation occurs between the support groove and the component even if the hoop material is positioned at a predetermined position, and when the mold die is closed, it protrudes from the component support groove. Since the broken part is sandwiched between them, it becomes a factor of breaking the mold.

Therefore, conventionally, in the parts inspection process, all parts are visually inspected for shapes and parts with abnormal shapes are removed. However, since parts after inspection may be deformed during storage, the shapes in the parts inspection process may be changed. It is difficult to completely remove the abnormal parts of.

Moreover, with the miniaturization of insert-molded products, the precision of molding dies and parts tends to become higher and higher in the future, and it becomes difficult and difficult to detect visually abnormal parts. There was a problem that the time increased significantly.

It is an object of the present invention to provide a component shape inspection apparatus which prevents a component having an abnormal shape that causes die damage from being attached to the die.

[0016]

FIG. 1 is a schematic view showing a component shape inspection apparatus according to the present invention. Note that the same object is denoted by the same symbol throughout the drawings.

The above problem has a mold mechanism and a grip mechanism for continuously feeding a hoop material having a metal part formed on the mold, and a resin around the metal part supported at a predetermined position of the mold. In the insert molding apparatus for molding the, the imaging optical unit 4 arranged in the vicinity of the hoop material 2 for sequentially outputting the image signal including the inspection region, and the abnormal optical component 21 processed by processing the output signal of the imaging optical unit 4. An abnormality detection unit 5 for detecting and a marking mechanism 6 for attaching a mark 24 on the hoop material 2 when a component 21 having an abnormal shape is detected.
And the mark 24 added from the hoop material 2 to the grip mechanism 3.
When the mark 24 attached to the hoop material 2 is detected, the mark detection mechanism 7 controls the operation of the grip mechanism 3 to move the corresponding component 21 from a predetermined position of the molding die 1. This is achieved by the component shape inspection device of the present invention that allows escape.

[0018]

In FIG. 1, an image pickup optical section arranged near the hoop material and sequentially outputting image signals including an inspection area, and an abnormality detection unit for processing the output signal of the image pickup optical section and detecting an abnormally shaped part. When a part with an abnormal shape is detected, it has a marking mechanism that puts a mark on the hoop material and a mark detection mechanism that is added to the grip mechanism to detect the mark from the hoop material. The mark shape detection mechanism controls the operation of the gripping mechanism to cause the corresponding part to escape from the predetermined position of the molding die. In order to precisely inspect the parts, there is no relation to the time of occurrence or the cause of occurrence, such as parts with abnormal shapes that have occurred during the machining process of parts or parts that have abnormal shapes during storage. Detecting a shape abnormal components it is possible to exclude. That is, it is possible to realize a component shape inspection device that prevents the abnormal shape of a component that causes die destruction from being attached to the die.

[0019]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 2 is a perspective view showing details of the image pickup optical section, FIG. 3 is a block diagram showing details of the abnormality detection unit, FIG. 4 is a view showing a method of processing an image signal in the abnormality detection unit, and FIG. 5 is the present invention. It is a figure which shows a component shape inspection method.

As in the conventional case, the insert molding apparatus operates as shown in FIG. 1 to automatically open and close to perform insert molding, and to operate in synchronization with the operation cycle of the mold 1 to perform hooping on the mold 1. A grip mechanism 3 for feeding the material 2 is provided.

The component shape inspection apparatus according to the present invention comprises an image pickup optical section 4, an abnormality detection unit 5, a marking mechanism 6 and a mark detection mechanism 7, and the hoop material 2 before molding wound around a reel 31 for feeding out. It is sent to the grip mechanism 3 by the component shape inspection device.

As shown in FIG. 2A, the image pickup optical section 4 is provided with a line sensor 41 arranged so as to be orthogonal to the traveling direction of the hoop material 2, and a line sensor 41 sandwiching the hoop material 2.
The light source 42 for irradiating the hoop material 2 through the diffusion plate 43 is provided on the opposite side of the light source 42.

The hoop member 2 is driven by a driving roller so that the hoop member 2 moves at a constant speed.
It is driven by 44 and is used for imaging the inspection area.
As shown in (b), scanning is repeated a plurality of times while the hoop material 2 moves for a predetermined distance, and signals are sequentially taken out from each element of the line sensor 41.

The abnormality detecting unit 5 includes an image input circuit 51, an abnormality determining circuit 52, and a marker control circuit as shown in FIG.
A buffer memory 8 configured by 53 and storing the image signal input from the imaging optical unit 4 is interposed between the image input circuit 51 and the abnormality determination circuit 52.

That is, the image input circuit 51 has a sensor control circuit 54 for repeatedly scanning to extract an image signal from each element of the line sensor 41, and the image signal extracted by the sensor control circuit 54 is the next image input control circuit. It is stored in the buffer memory 8 via 55.

The abnormality determination circuit 52 has a position correction circuit 56, an inspection frame application circuit 57, a position control circuit 58, an abnormality determination circuit 59 and a signal output circuit 60, and processes the image signals sequentially fetched from the buffer memory 8. When the positional deviation of the parts is detected, an error signal is output in the next process.

When the marker control circuit 53 for controlling the marking mechanism 6 is connected to the abnormality determination circuit 52 and an error signal is output, the marking mechanism 6 is activated to make a notch or the like near the relevant part. By this, a mark 24 that can be easily detected is attached to the hoop material 2.

Further, a mark detecting mechanism 7 for detecting the mark 24 is added to the grip mechanism 3 for feeding the hoop material 2 into the mold die 1, and when the mark 24 is detected, the mold die 1 is detected.
The grip mechanism 3 is configured to skip the corresponding component and move it to the next when it is sent to.

As shown in FIG. 4 (a), parts 21 made of metal to be insert-molded are formed on the hoop material 2 at a predetermined interval. A pilot hole 22 for positioning the mold 1 at a predetermined position is formed.

Therefore, the inspection area 25 set on the hoop material 2 and imaged by the line sensor 41 continues almost without interruption in the length direction, and when the hoop material 2 continuously moves, signals before and after the buffer memory 8 are provided. It is necessary to perform input and signal reading in parallel.

Therefore, the buffer memory 8 stores the image signals corresponding to the respective inspection areas as shown in FIG.
Each memory 81 and a memory selection circuit 83 that selects one of the memories 81 based on the signal output from the pilot hole detection circuit 82 are provided.

The line sensor 41 of the image pickup optical section 4 has an element for monitoring passage of the pilot hole 22 at a position facing the pilot hole 22, and when the pilot hole 22 passes under the line sensor 41, FIG. The pulse signal shown in is output from the pilot hole detection circuit 82.

The pilot hole 22 is preceded by a predetermined distance from the front edge of the inspection area 25, and after the pulse signal shown in FIG. 4 (b) is output, the preceding distance is delayed by the time for the hoop member 2 to move. The line sensor 41 outputs an image signal corresponding to each inspection area.

The memory selection circuit 83 outputs a signal corresponding to the moving distance of the hoop material 2 output from the circuit for driving the drive roller 44 of the image pickup optical section 4 and the pilot hole detection circuit 82 shown in FIG. One of the memories 81 is selected based on the pulse signal shown in FIG.

That is, one pulse signal shown in FIG. 4 (b) outputs the signals shown in FIGS. 4 (c) and 4 (d) from the memory selection circuit 83, and by the signal shown in FIG. 4 (c). For example, the image input circuit 51 is connected to the first memory 81, and the image signal is stored in the first memory 81.

At this time, while the second memory 81 is connected to the abnormality judging circuit 52 by the signal shown in FIG. 4D and the image signal is stored in the first memory 81, the abnormality judging circuit 52 is operated by the second memory 81. 81
The image signal stored in is read and the signal is processed to detect the positional deviation of the component.

Similarly, with one pulse signal shown in FIG. 4B, the signals shown in FIGS. 4E and 4F are the memory selection circuit.
The image input circuit 51 is connected to the second memory 81 by the signal output from 83 and shown in FIG. 4 (e), and the image signal is stored in the second memory 81.

At this time, while the first memory 81 is connected to the abnormality judging circuit 52 and the image signal is stored in the second memory 81 by the signal shown in FIG. 81
The image signal stored in is read and the signal is processed to detect the positional deviation of the component.

For example, a component having the shape shown in FIG.
When the inspection of 21 is carried out, the allowable range of the positional deviation is taken into consideration in the inspection frame application circuit 57 of the abnormality determination circuit 52 as a reference pattern.
The inspection frame 61 shown in (b) is registered, and the inspection frame 61 is framed on the image to be inspected.

As shown in FIG. 5B, the inspection frame 61 has a plurality of inspection windows 62 corresponding to the inspection object, and the inspection order is the position control circuit.
The abnormality determination circuit 59 compares the inspection frame 62 with the inspection frame 61 in each inspection window 62 according to the order, and detects the positional deviation of the image to be inspected.

Hoop material 2 fed into the molding die 1
6B is positioned by a plurality of pilot pins 13 as shown in FIG. 6B. However, since the imaging optical unit 4 is not normally restricted by the pilot pins or the like, the hoop member 2 may be displaced or tilted.

That is, the input image may be displaced or tilted as shown by the solid line with respect to the reference position shown by the broken line in FIG. 5 (c). When the inspection frame application circuit 57 applies an inspection frame 61 shown in FIG. 5 (b) to such an image, it is determined that the component is abnormal in shape even if it is a good product.

Therefore, as shown in FIG. 3, the abnormality determination circuit 52 includes a position correction circuit 56 between the buffer memory 8 and the inspection frame application circuit 57.
Is provided, and the position correction circuit 56 detects the positional deviation of the input image with reference to the pilot holes 22 located on both sides of the hoop material 2.

For example, in the image shown by the solid line in FIG. 5C, the position of the pilot hole 22 is Δ with respect to the reference position shown by the broken line.
There is an angle of θ between the central axis passing through the center of the pilot hole 22 in the image and the central axis passing through the center of the pilot hole 22 at the reference position, which are offset by x and Δy.

The positional deviation data detected by the position correction circuit 56 is input to the inspection frame application circuit 57 and prior to the inspection frame 61 being framed, the positional deviation data input from the position correction circuit 56 is output from the buffer memory 8. The position of the read image signal is corrected.

As described above, the image pickup optical section which is arranged near the hoop member and sequentially outputs the image signal including the inspection area, and the abnormality detection unit which processes the output signal of the image pickup optical section and detects the abnormal shape part. When a part with an abnormal shape is detected, it has a marking mechanism that puts a mark on the hoop material and a mark detection mechanism that is added to the grip mechanism to detect the mark from the hoop material. The mark shape detection mechanism controls the operation of the gripping mechanism to cause the corresponding part to escape from the predetermined position of the molding die. In order to precisely inspect the parts, it is related to the time of occurrence and the cause of occurrence, such as parts with abnormal shapes that have occurred during the machining process of parts or abnormal shapes that have occurred during storage. Detecting the Ku shape abnormal components it is possible to exclude.

In other words, it is possible to realize a component shape inspection device which prevents an abnormal component having a shape that causes die damage from being attached to the die.

[0048]

As described above, according to the present invention, it is possible to provide a component shape inspection device which prevents a component having an abnormal shape that causes die damage from being attached to the die.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a component shape inspection device according to the present invention.

FIG. 2 is a perspective view showing details of an imaging optical section.

FIG. 3 is a block diagram showing details of an abnormality detection unit.

FIG. 4 is a diagram showing a method of processing an image signal in the abnormality detection unit.

FIG. 5 is a diagram showing a component shape inspection method according to the present invention.

FIG. 6 is a principle diagram showing a configuration of a conventional insert molding apparatus.

[Explanation of symbols]

1 Mold Die 2 Hoop Material 3 Grip Mechanism 4 Imaging Optical Section 5 Abnormality Detection Unit 6 Marking Mechanism 7 Mark Detection Mechanism 8 Buffer Memory 13 Pilot Pin 21 Parts 22 Pilot Hole 24 Mark 25 Inspection Area 31 Reel 41 Line Sensor 42 Light Source 43 Diffuse Plate 44 Drive roller 51 Image input circuit 52 Abnormality determination circuit 53 Marker control circuit 54 Sensor control circuit 55 Image input control circuit 56 Position correction circuit 57 Inspection frame hooking circuit 58 Position control circuit 59 Abnormality determination circuit 60 Signal output circuit 61 Inspection frame 62 Inspection window 81 Memory 82 Pilot hole detection circuit 83 Memory selection circuit

Claims (4)

[Claims] 1. A mold die and a grip mechanism for continuously feeding a hoop material having a metal part formed on the mold die, the periphery of the metal part supported at a predetermined position of the mold die. In an insert molding device that molds resin on, the imaging optical unit (4) that is arranged near the hoop material (2) and sequentially outputs the image signal including the inspection area, and the output signal of the imaging optical unit (4) An abnormality detection unit (5) that processes and detects abnormal shape parts (21), and a marking mechanism that attaches marks (24) on the hoop material (2) when abnormal shape parts (21) are detected (6) and the hoop material added to the grip mechanism (3)
(2) has a mark detection mechanism (7) for detecting the mark (24), and when the mark (24) attached to the hoop material (2) is detected, the mark detection mechanism (7) causes the grip mechanism to be detected. A component shape inspection device, characterized in that the component (21) is configured to be ejected from a predetermined position of the molding die (1) by controlling the operation of (3). 2. A line sensor in which an imaging optical section (4) is arranged so as to be orthogonal to the traveling direction of the hoop material (2).
(41) and a light source (42) for irradiating the hoop material (2), which is arranged on the opposite side of the line sensor (41) with the hoop material (2) interposed therebetween, and is used for imaging the inspection area. The scanning that sequentially takes out the signals output from each element from one end to the other end of the line sensor (41) is repeated a plurality of times while the hoop material (2) moving at a constant speed moves a predetermined distance. The component shape inspection apparatus according to claim 1, which is performed. 3. An image input circuit (51) in which an abnormality detection unit (5) takes an image signal of an inspection area into a buffer memory (8).
An abnormality determination circuit (52) for detecting the positional deviation of the parts by taking out the image signal from the buffer memory (8), and a marker control for controlling the marking mechanism (6) by the output signal of the abnormality determination circuit (52) At least two memories (81) each comprising a circuit (53) and each of which the buffer memory (8) can store an image signal of one inspection region
And a memory selection circuit (83) for selecting one of the memories (81) according to the signal obtained when the passage of the pilot hole (22) is detected, and the image input circuit (51) from the imaging optical unit (4). ), The image signal of the inspection area is being fetched into one of the memories (81) via the other memory (81), and the image signal is output from the other memory (81) to the abnormality determination circuit (52). 1. The component shape inspection device according to 1. 4. An imaging optical section (4) arranged in the vicinity of the hoop material (2) according to claim 1 for sequentially outputting an image signal including an inspection area, and a component (21) having an abnormal shape due to the output signal. When comparing the image signal input from the imaging optical unit (4) with the standard pattern registered in the abnormality detection unit (5) in the component shape inspection device equipped with the abnormality detection unit (5) , Pilot holes formed on both sides of the hoop material (2)
(22) detects the positional deviation between the standard pattern and the image signal based on the reference, corrects the positional deviation of the image signal based on the detected positional deviation amount, and then superimposes the standard pattern on the image signal, Parts with abnormal shape by detecting mismatched parts (21)
And a component shape inspection method.