KR101211926B1 - Apparatus and method for inspecting preform - Google Patents

Abstract

PURPOSE: An apparatus for inspecting preforms is provided to accurately ascend and descend, and to minimize operating loads by a turret assembly. CONSTITUTION: An apparatus for inspecting preforms comprises an in-star wheel(200), a turret assembly(300), a gate cutting gunit(400), first and second inspection modules(600,800), and an out-star wheel(700). The in-star wheel receives the preforms through a curved border portion of an in-rail(106), and settles the preforms on a pocket of a rotary transferring plate(210). The turret assembly rotates the preforms by adsorbing the preforms with a suction mouth of a pusher(350). The turret assembly moves the pusher and preforms up or down by a guide unit and turret cam unit. The gate cutting unit cuts a gate of the perform in a state where the lower part of a revolving perform is supported by a hole cup. The first inspection module inspects a neck and body of the preform. The out-star wheel rotates and transfers the preforms by adsorbing the preforms. The second inspection module inspects the neck-in, neck inner wall, neck top seal surface, cut portion, and the bottom part of the preform.

Description

Preform Inspection System and Inspection Method {APPARATUS AND METHOD FOR INSPECTING PREFORM}

The present invention relates to a preform inspection device and an inspection method.

In general, preforms made of polyethylene terephthalate (PET) can be supplied to blow molding apparatuses or stretch-blow molding apparatuses to produce hollow containers such as bottles or flasks.

The preform comprises a tubular body with one of its longitudinal ends closed, with a neck at the open opposite end and substantially integrally formed under the neck, the body being injection molded After operation, the final container shape can be obtained.

As the prior art which is the background of the invention, the preform inspection apparatus 10 of Patent Document 1 shown in FIG. 1 includes a preform supply unit 1 for supplying a preform P to the first preform conveying unit 3, and a preform inspection apparatus ( 10 and a plurality of pushers 3a (pushers) provided on the first rotating plate that rotates by receiving rotational force from the driving means 2 and providing the power required for the operation of the drive unit 2 of the pusher 3a. It has the 1st preform conveyance part 3 which adsorb | sucks and moves the preform P by the 1st adsorption port 3b, and the preform rotating part 4 which rotates the preform P of the 1st preform conveyance part 3. .

In addition, the preform inspection device 10 of Patent Document 1 is installed adjacent to the section in which the preform rotating part 4 is installed to inspect the body surface of the preform (P), and the first preform conveying part (3) When the preform P moves through the preform pivot 4 to the "α" distance and rotates two times, the first and second reflectors are moved together by the "α / 2" distance to reflect the image reflected by the first and second cameras. Neck surface inspection unit provided with a body surface inspection unit 5 having a first reflector rotating device for returning to the original position after the photographing and inspection, and a second reflector rotating device for inspecting the neck surface of the preform P. Have (6)

In addition, the preform inspection device 10 of Patent Document 1 includes a plurality of suction pipes disposed in the radial direction on the second rotating plate and a second suction hole provided at the end of the suction pipe, so that the preform P of the first preform conveying part 3 is provided. ) Is installed adjacent to the section in which the second preform conveying unit 7 and the second preform conveying unit 7 are installed and transported by the second adsorption port, and the neck inner wall, the neck dimension, and the gate cutting portion And a preform discharge part 9 for discharging the inspected preform P to the outside.

However, the preform inspection apparatus of Patent Document 1 has many problems as described later.

First, the preform inspection apparatus of patent document 1 has the screw-type preform supply part 1. Here, the preform supply part 1 is equipped with the screw 1a which is a screw-type feeder which has a fixed feed pitch, and the circular guide-shaped guide wheel 1b. Here, the screw 1a and the guide wheel 1b are also disclosed by FIG. 2 of patent document 1. As shown in FIG.

In the preform supply unit 1, the preform P delivered from the preceding logistics system is transferred toward the guide wheel 1b via the screw 1a. At this time, the feed pitch of the screw (1a) should match the feed pitch of the guide wheel (1b), there is a difficulty that the preform (P) being transferred from the screw (1a) to be stably seated on the guide wheel (1b).

That is, since the conveying method using the screw 1a has a large contact area with the preform P, a relative speed between the surface of the preform P and the conveying surface of the screw 1a may occur, and the preform P Surface defects such as scratches on the surface of the surface may occur, and the degree of surface defects caused by the contact of a large area is also severe.

In addition, a drive system and an installation space for driving the screw 1a are required before the guide wheel 1b, and a control system for synchronizing the feed pitch and position between the guide wheel 1b and the screw 1a is required. The difficulty of the configuration is high, high configuration cost can be generated, and the complexity of the basic configuration has the disadvantage of relatively high failure rate and management cost.

Moreover, the preform inspection apparatus of patent document 1 has the 2nd preform conveyance part 7 while the 1st adsorption port 3b of the pusher 3a of the 1st preform conveyance part 3 is conveying while applying an adsorption force to an up-down direction. Since the second adsorption port of the second adsorption port is brought into action in the horizontal direction perpendicular to the vertical direction, there is a disadvantage that the adsorption pad portion of the first and second adsorption port is damaged.

Damage to the adsorption pad area may result in poor quality of feed or malfunction of the equipment, which may cause disruption to the production of the product.

In addition, the preform inspection apparatus of Patent Literature 1 disposes the preform P recognized as defective according to the inspection results of the various inspection units 5, 6, and 8 by dropping it into a defective collection unit at all stages of the preform discharge unit 9. At this time, as air pressure is applied to the preform P with a pneumatic ejection device (not shown) using a capillary hole for pneumatic injection to separate the preform P from the second adsorption port of the second preform conveying part 7, There is a disadvantage that the operating load of the second adsorption port can be increased.

In addition, the preform inspection device of Patent Document 1, while performing the suction force operation of the second adsorption port to transfer the preform P from the second preform conveying unit 7 to the preform discharge unit 9 individually, the preform discharge unit As the toothed rotating plate of (9) is brought into the preform (P), the suction pad of the second adsorption port of the second preform conveying unit 7 may be damaged, the conveying speed is relatively slow, and the preform ( In order to increase the rotational speed of the first and second preform conveying units 3 and 7 to increase the conveying speed of P), the preform P of the first preform conveying unit 3 is transferred to the second preform conveying unit 7. It may have the disadvantage of generating an error that is not propagated.

On the other hand, as a background art of the invention, the preform inspection apparatus of Patent Literature 2 has an upper cam member (see FIG. 4 of Patent Literature 2) disposed on an inner upper portion of the first preform conveying portion 3 of FIG. 1. Have

The upper cam portion is located on the inner upper portion of the first preform conveying portion 3, and the upper cam portion moves up and down the pusher 3a and the first suction port 3b.

That is, the pusher 3a and the first suction hole 3b move downward in the inclined section of the cam profile of the upper cam portion while rotating by the idle of the first preform feeder 3, In the upper slope section of the cam profile, it is restored to its original height by upward movement using the restoration of the spring.

At this time, the initial position of the pusher (3a) is determined by the spring force, and the spring force should have sufficient strength in consideration of the self-weight of the pusher (3a) and related components associated therewith, so that the pusher associated with the pusher (3a) The load of the system becomes large, adversely affects the wear of the pusher system, the durability, and the like, and consequently, the life of the preform inspection device is reduced or the replacement cycle of the life parts is shortened.

In addition, since the first suction port 3b of the pusher 3a has a vacuum suction force by using the same number of solenoid valves, the configuration using the plurality of solenoid valves may be complicated. In addition, the difference in durability life such as wear or deterioration of each solenoid valve may cause a deviation (pressure fluctuation) in adsorption performance, and wear is large due to mechanical operation of the solenoid valve.

Further, the first adsorption port 3b of the pusher 3a is provided with a convex protrusion protruding relatively high at its lowermost bottom, and the neck portion of the non-crystallized preform P because of this relatively protruding conical protrusion. Since the side light cannot be used at the time of inspection, a light source is installed below the preform P, and the inspection is performed using the light reflected on the side surface of the conical projection. At this time, the inspection area is set by the size and shape of the conical projection. Since the inspection area is set by the conical shape, the inspection area has a limited disadvantage.

In addition, since the direct light source cannot be used, indirect light is used, which causes a significant amount of light loss compared to the direct light source, thereby darkening the captured image. In addition, foreign matters or scratches on the reflective surface of the conical projections are reflected in the inspection image, thereby reducing the reliability of the inspection.

For this reason, the management of the conical protrusions is necessary, which incurs administrative costs or periodic replacement costs.

Further, the driving force for restoring to the initial position (top dead center) at the bottom dead center of the pusher 3a in operation depends entirely on the spring force. At this time, the driving force is influenced by the component tolerance of the spring or the change in the self weight of each pusher 3a, or by the friction state with the guide part for the pusher 3a. This influence may act as a factor that causes an error in control parallax.

In addition, the body surface inspection portion 5 and the neck surface inspection portion 6 of Patent Document 1 has a disadvantage that the driving load is relatively large.

In detail, the preform P of FIG. 1 is rotated by the preform rotating part 4 while revolving by the first preform conveying part 3. In this case, the body surface inspection part equipped with the first reflector rotating device is provided. (5) and the neck surface inspection part 6 provided with the 2nd reflector rotating device are made to ensure the image of the preform P. As shown in FIG.

The first reflector rotates the first reflector in the same direction as the revolving direction of the preform P during the rotation period of the preform P. Then, the image of the torso surface (outer body surface) of the preform P is obtained. It will return to the initial position to capture. In order to perform such an operation, the first driving cam and the first spring are used for the rotation axis of the first reflector.

In the same manner, the second reflecting mirror of the neck surface inspection unit 6 uses the rotation axis of the second reflecting mirror, the second driving cam, and the second spring to capture the neck surface (neck outer surface) image by the second reflecting mirror rotating device. It will work. The first and second drive cams for rotating the first and second reflectors are connected to the ends of the first and second rotation shafts of the first and second reflectors so that they can be synchronized in the same period. It is made to rotate by a driving force.

Since each of the independent first and second reflectors is operated by one motor, the length of the path for transmitting the driving force is relatively long, the structure is complicated, and the driving load is relatively large. It is difficult to respond.

Moreover, the preform rotating part 4 of patent document 1 frictions by contacting the belt of the preform rotating part 4 directly with the 1st adsorption port 3b, in order to rotate the pusher 3a and the 1st adsorption port 3b. Generates magnetic power.

At this time, the foreign matter of the belt may be introduced into the surface of the first suction port (3b) or the preform (P) in the vicinity, there is a disadvantage that an inspection error may occur.

In addition to the body surface inspection section 5 and the neck surface inspection section 6, the inspection section 8 which inspects the neck inner surface, the neck dimensions, the gate cutting section and the bottom section is a single color light source and transmits light of various preforms P. There is a disadvantage that it is difficult to optimize the discrimination ability between the change and the foreign object.

In particular, the preform P has a type in which the neck is formed to be transparent, and there is a type in which the neck is formed to be opaque (for example, white), such as a juice PET bottle.

That is, since the inspection part 8 of patent document 1 can inspect only a neck inner surface, when the foreign material exists in the intermediate position between a neck inner surface and an outer surface when inspecting the preform P of the type in which the neck was formed transparent. However, it has a disadvantage in that it is difficult to inspect the inside of the neck due to the lack of discrimination.

Meanwhile, the gate cutting part 11 of FIG. 1 is located on the revolving path of the first preform conveying part 3 to cut the gate (protrusion) of the lower part of the preform P, but at this time, only the upper part of the preform P While moving while being suspended by the first suction port 3b of the pusher 3a, shaking occurs as the gate of the upper portion of the preform P contacts the gate cutting portion 11 so that the angle is slightly changed. There is a disadvantage that the cut surface may not be formed horizontally.

Patent Application Publication No. 10-0751266 Patent Application Publication No. 10-0831368

An embodiment of the present invention is a first inspection module having an in-star wheel part receiving a preform from an in rail, a turret assembly having a guide part and a turret cam part, a gate cutting part having a hole cup, and a whole body tracking mirror And a second inspection module having an out star wheel unit having a decompression switch, a telecentric lens, and a neck internal inspection unit, to provide high-speed operation and increase inspection discrimination.

According to an aspect of the present invention, the preform is received through an in-rail installed on one side of the apparatus frame along a movement path of the preform and a smooth curved border portion of the in-rail, and the preform is pocket of the rotary transfer plate. A turret assembly configured to raise or lower the pusher and the preform by a guide part and a turret cam part while adsorbing and revolving the in-star wheel part respectively seated on the rotating part and the preform of the in-star wheel part by a suction mouse of the pusher; The gate cutting portion for cutting the gate of the preform with a cutter while supporting the lower portion of the preform revolving by the turret assembly with a hole cup, and the upper pulley formed on the pusher to rotate by belt friction, A preform rotating part for rotating the preform, a neck of the preform rotating in the turret assembly, A first inspection module for inspecting a tube, an out star wheel portion for absorbing and rotating the preform from the turret assembly, a neck inside a neck of the preform of the out star wheel portion, a neck top seal surface, a gate cutting portion and a bottom portion or a neck; A preform inspection apparatus may be provided that includes a second inspection module for inspecting an inner surface and an out rail installed at the other side of the apparatus frame adjacent to the out star wheel part and transferring the preform in which the inspection is completed.

In addition, a rotation damping unit may be further included between the first inspection module and the out star wheel unit to reduce or stop the rotation of the preform.

In addition, the present embodiment may further include an ejector unit having an air blower connected to a mounting frame of an apparatus frame under the out star wheel part, and a collection box installed on the opposite side of the air blower with the preform interposed therebetween. Can be.

The turret assembly may further include a hollow support erected on a mounting frame of the apparatus frame, a top plate supported by the hollow support, a hollow post installed downward from the center of the top plate, and a vertical downward direction from the post. A main housing installed on the mount in a position, a main shaft rotatably coupled in the main housing, a driven gear coupled to a lower end of the main shaft to receive rotational force from a device driving means, and the main shaft Combined to receive power, the turntable housing is rotated based on the outside of the main housing, a plurality of hole cup holders installed in the radial direction on the turntable housing, hole cups are replaceably coupled to the ends of the hole cup holder, A turret housing fixed to an end of the main shaft and an inner side of the turret housing And a main vacuum distributor coupled to the bearing and bolted to the bottom of the post, and a dispensing housing rotatably coupled while maintaining hermeticity outside the main vacuum distributor.

The turret assembly may include a main turret coupled to an outer flange of the turret housing and having a plurality of pushers disposed thereon, a turret wall erected along the periphery of the main turret, an upper portion of the turret wall and a lower portion of the distribution housing. It may include a turret cover for connecting, a turret cam portion installed by matching a center line to the main vacuum distributor in a vertical upper portion of the main turret, and a follower guide installed in the turret cam portion to guide the first cam follower. .

In addition, the pusher has a surface roughness necessary for the adsorption of the preform, the adsorption mouse having a positioning protrusion on the bottom surface of the adsorption mouse, and connected to the adsorption mouse through the bushing of the main turret outside the turret cover An adsorption shaft extending up to and including a guide part for guiding the adsorption shaft based on the turret wall, the first cam follower installed in the guide part, and an upper pulley coupled to the adsorption shaft outward of the turret cover And a pusher vacuum distributor rotatably coupled to the upper end of the suction shaft by a bearing and a seal, and a pusher pipe joint piped to the pusher vacuum distributor.

The turret cam portion may include a cam profile that supports the first cam follower below the first cam follower of the pusher.

In addition, the gate cutting unit, the cutter portion for cutting the gate which is seated in the hole cup protruding below the bottom of the hole cup, the cutter bracket provided with the cutter portion, the transfer block connected to the side of the cutter bracket, the transfer block And a conveying bed installed on a mount to guide the cutter bracket in an up and down direction, a screw shaft rotatably installed on the conveying bed and screwed to the conveying block, and a shaft coupled to an end of the screw shaft. It may include a handle.

The first inspection module may include a whole body tracking mirror having an area corresponding to a 360 degree front surface of the neck and the body of the preform, a mirror base coupled to a lower portion of the whole body tracking mirror, and a bottom portion of the mirror base. A mirror driven shaft, an extension bar connected to a lower portion of the mirror driven shaft and extending to one side, a second cam follower coupled to a lower end of the extension bar, and a close contact with a side of the second cam follower A mirror cam portion, a mirror spring support erected on an upper end of the extension bar vertically with the second cam follower, a frame spring support coupled to a frame on which the mirror cam portion is mounted, the mirror spring support and the frame A mirror restoration spring coupled between a spring support, a cam drive shaft for rotating the mirror cam portion, and a device drive coupled to a lower portion of the cam drive shaft It may include a cam pulley to receive the rotational force via the delivery end of the belt.

The first inspection module may include a first image capture unit disposed at one side of the whole body tracking mirror, a second image capture unit disposed under the first image capture unit, and the whole body tracking centering the preform. It may include a first light source disposed at a position opposite to the mirror.

The second image capturing unit may be disposed under a 2-1 image capturing unit for capturing a torso of a preform having a small trunk length, and a lower portion of the 2-1 image capturing unit for capturing a preform with a large torso length. It may include a 2-2 image capture unit.

The out star wheel unit may include a hollow rotating shaft rotated inside the wheel housing, a wheel frame coupled to an upper portion of the hollow rotating shaft, a vacuum post disposed inside the hollow rotating shaft, and an upper portion of the vacuum post. A sub vacuum distributor, a plurality of vacuum suction units arranged at equal intervals along the outer ring of the wheel frame, a suction tube disposed between the sub vacuum distributor and the plurality of vacuum suction units to form a radial structure, and the suction tube Three-way piping connector piped in the middle, the decompression line extending from the three-way pipe connection to the outside air communication, the decompression switch coupled in the middle of the decompression line, and in the rotation section of the out star wheel portion in a position that requires decompression Correspondingly installed mechanical contact member or electrical switching means for turning on and off the decompression switch . ≪ / RTI >

The second inspection module may include a module post erected on a mount of the apparatus frame, a graduation indicator horizontally installed in the middle of the module post, an upper cylinder support supported by the module post, and the upper cylinder support. It may include a lifting cylinder installed in, a guide bushing disposed on both sides of the lifting cylinder and installed on the upper cylinder support, and a lifting plate suspended on the operation rod of the lifting cylinder and the guide shaft of the guide bushing.

The second inspection module may include a ring-shaped first base plate provided at a second plate through hole of the elevating plate, a first vertical mounting table installed perpendicularly to an upper surface of one side of the first base plate, and the first vertical plate. A fourth image capturing unit installed to face down from the mounting table, a telecentric lens mounted on the fourth image capturing unit, and a third light source disposed under a vertical portion of the neck internal inspection unit to irradiate light toward the preform; It may be characterized by having a neck internal inspection unit having a.

In addition, the preform rotating unit or the rotating damping unit further includes a belt tensioner, the belt tensioner, the tensioner bracket coupled to any one of the hollow support erected on the mounting frame of the device frame, and the preform rotating unit or A tensioner pulley disposed inside the friction belt of the rotating damping unit, a tensioner rod connecting one end of the tensioner rod to the pulley shaft of the tensioner pulley, and the other end of the tensioner rod rotatably coupled to the tensioner bracket, and the tensioner pulley It may include a tension spring coupled between the spring support of the upper end of the one end of the tensioner rod vertically upward of the tensioner bracket.

Further, according to another aspect of the invention, in the inspection method made by a preform inspection apparatus having a first image capture unit and a computer of the first inspection module, the computer, the screw of the preform neck to the first image capture unit Image input step of acquiring a photographed image which is a whole screw by sequentially photographing vertical components of an image for a predetermined time, and creating a synthetic image by copying and synthesizing the photographed image into three, and a standard to be examined in the synthesized image. After rearranging the image by performing the operation of separating the screw line and the background portion of the screw, the inspection region setting step of setting the reference image and multiple inspection area for the inspection based on the screw start projections, and the multiple of the set screw Analyze the contrast of the pixels for the inspection areas to determine the size of the pixels beyond the threshold If there is more than one at least in a lump form and otherwise it is determined as defective preform has a preform inspection method for performing a determination whether or not foreign material preform comprising: determining a normal preform may be provided.

The setting of the inspection area may include a first step of searching for an entry position and a top protrusion position of the preform in the photographed image, and a second step of aligning and rearranging the photographed image in a circular cue form to form a reference image; And a third step of automatically adjusting an area to be inspected for a gap between the screws broken in the vertical direction in the reference image.

In addition, after the inspecting area setting step, the computer recognizes a character recognition target area between the first jaw and the second jaw, which is a mold characteristic, in the reference image, and sets a plurality of inspection start points in the character recognition target area. And set a plurality of inspection end points outside the character recognition target area, and identify a character object to be recognized through clustering within an area defined by an inspection width and a mold area width including the inspection start point and the inspection end point. After screening, one by one character is fractionated by projection to extract a mold number, and the extracted mold number may be recognized as a cluster neural network classification unit of a computer and displayed on the operation panel of the preform inspection apparatus.

This embodiment simplifies the configuration of the device by the smoothly curved border portion of the in-rail and in-star wheel parts, and reduces the manufacturing cost, while stably injecting the preform while preventing the surface damage of the preform compared to using a screw. There is an advantage that can be transported by seating on.

According to the present embodiment, the turret assembly having the guide part and the turret cam part can induce precise lifting and lowering while minimizing the operating load of the pusher, and has the advantage of compacting the size of the turret assembly.

In this embodiment, the height of the alignment alignment protrusion for preform alignment is minimized, and the first light source is installed at a position opposite to the first image capture unit during the internal inspection of the preform to capture an image with light transmitted directly through the preform. According to the present invention, the captured image is relatively bright according to sufficient light quantity, and there is no error factor affecting the inspection image other than the preform which is the inspection object between the first light source and the first image capture unit.

This embodiment provides a first inspection module having a whole body tracking mirror, thereby simplifying its structure by using only one common whole body tracking mirror in an independent image capturing unit, reducing manufacturing costs, and reducing the difficulty of assembly and processing, There is an advantage that can improve the performance stability of the preform inspection device by significantly lowering the frequency of failure.

In addition, the present embodiment can minimize the size of the rotary driving unit connected to the whole body tracking mirror, can reduce the driving load, and the high-speed rotation or return is possible, there is an advantage that can be a high-speed inspection.

In this embodiment, as the cutting is made while the preform is stably transported by the gate cutting part having the hole cups, which is supported by two points (where supported by the mouse and the hole cups), the gate cutting surface is formed horizontally so that high quality cutting is possible. There is an advantage to get quality.

In particular, the gate cutting unit further includes a height adjusting mechanism, which has an advantage of precisely adjusting the gate cutting position.

In addition, the gate cutting unit is to replace the hole cup corresponding to the standard of the preform, there is an advantage that can cut the gate of the preform of various standards.

This embodiment has the advantage that the foreign matter inside the neck can be precisely inspected by the second inspection unit having a telecentric lens and the neck internal inspection unit.

This embodiment has the advantage that by the out star wheel portion having a decompression switch to prevent the adsorption pad portion is damaged in advance, the product productivity can be increased through the transfer quality improvement, the device operation error prevention.

The present embodiment has an advantage of providing a rotating damping unit for slowing or stopping the rotation of the preform generated by the preform rotating unit, thereby stably transferring the preform of the turret assembly toward the out star wheel unit.

In particular, the preform rotating part and the rotating damping part may further include a belt tensioner, thereby maintaining the belt tension required for the preform rotating part and the rotating damping part in an optimized state.

This embodiment provides a main vacuum distributor, which does not require the use of solenoid valves individually.

1 is a perspective view for explaining the configuration of a preform inspection apparatus according to the prior art.
2 is a plan view of a preform inspection apparatus according to an embodiment of the present invention.
3 is a cross-sectional view of the turret assembly shown in FIG.
4 is a cross-sectional view of the hole cup and the gate cutting unit shown in FIG. 2.
5 is a cross-sectional view of the whole body tracking mirror and the first inspection module shown in FIG. 2.
6 is a cross-sectional view of the out star wheel unit having the pressure reducing switch in FIG. 2.
FIG. 7 is a side view of the second inspection module, the gate cutting portion, and the bottom portion inspection portion illustrated in FIG. 2.
FIG. 8 is a side view of the neck internal inspection unit of the second inspection module illustrated in FIG. 2.
FIG. 9 is a side view of the neck inner surface inspection unit which may be replaced with the second inspection module illustrated in FIG. 2.
FIG. 10 is a side view of a neck top seal surface inspection unit of the second inspection module illustrated in FIG. 2.
11 is a flowchart illustrating a preform inspection method according to the present embodiment.
12 is a plan view showing a method of acquiring a neck outer surface image of an orbiting and rotating preform.
13 is a drawing substitute photograph showing a captured image of a preform.
FIG. 14 is a flowchart for explaining details of an inspection area setting step illustrated in FIG. 11.
FIG. 15 is a flowchart of a location search step shown in FIG. 14.
FIG. 16 is a flow chart of the redeployment step shown in FIG. 14.
FIG. 17 is a drawing substitute photograph for explaining the steps of FIGS. 14 and 15.
18 is a flowchart of the adjustment step shown in FIG.
19 is a drawing substitute photograph for explaining the steps illustrated in FIG. 18.
20 is a drawing substitute photograph for explaining a preform foreign matter presence determination step.
21 is a drawing substitute photograph for explaining a preform character recognition method according to a preform inspection method.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In particular, the present embodiment may be applicable to the preform inspection apparatus referred to as the background art, and thus may be understood due to the background art, or the similar configuration may not be included in the description of the present embodiment.

2 is a plan view of a preform inspection apparatus according to an embodiment of the present invention.

Referring to FIG. 2, the present embodiment includes an apparatus frame 100, an in star wheel 200, an turret assembly 300, a gate cutting unit 400, and a preform rotating unit 500. ), A first inspection module 600, a rotating damping unit 690, an out star wheel 700, an second inspection module 800, and an ejector unit 900.

The device frame 100 may form a frame of the device frame 100 with an aluminum profile or a structural member of each aluminum frame, and may finish the surface between the frames with a plate member such as steel sheet or glass.

The device frame 100 may include a mounting base 101 supported by a skeleton at an intermediate position with respect to the device height direction.

The mounting base 101 can be disassembled and assembled from the apparatus frame 100 by bolt nut coupling.

The main device configuration of the preform inspection device is mounted in the space above the mounting table 101, and device driving means 102 such as a motor and a power transmission mechanism may be mounted in the space below the mounting table 101.

At one corner of the device frame 100, an electrical panel 103 may be disposed to supply necessary power or to process a control signal throughout the preform inspection apparatus. The electrical panel 103 may be electrically coupled to the computer 104 and the operating panel 105 on which the software for preform inspection method is mounted.

In this embodiment, the in-frame 106 is installed on one side of the apparatus frame 100 so as to receive a preform from a preceding logistics system (not shown), and the apparatus frame is configured to transfer the preform that has been inspected. On the other side of the 100 may include an out rail 107 (out rail) is installed adjacent to the out star wheel (700).

That is, the in rail 106 may be installed on the movement path of the preform.

In addition, the in rail 106 is installed to be inclined so as to reach the border portion of the in star wheel part 200 from one side of the apparatus frame 100.

The border portion of the gentle curve of the in rail 106 is formed along the rotational direction of the in star wheel part 200.

Accordingly, the preform may move downward by the own weight along the in-rail 106 installed at an inclined angle, and then may be transferred toward the in-star wheel unit 200 through a border portion of the smooth curve of the in-rail 106.

In star wheel 200 (in star wheel), turret assembly 300 (turret assembly), gate cutting unit 400, preform rotating unit 500, the first inspection module 600, the rotation damping unit 690 The out star wheel 700, the second inspection module 800, and the ejector unit 900 may be mounted in the device frame 100 based on the mounting base 101.

The in-star wheel unit 200 may play a role of receiving or transferring the preform to be inspected from the in rail 106.

The in-star wheel unit 200 is a rotary transfer plate 210 having a pocket (pocket) for seating and transporting the preform received separately, and the transfer is installed on the mounting table 101 is spaced apart from the pocket of the rotary transfer plate 210 Guide 220 may be included.

The in-star wheel unit 200 may have a simplified configuration compared to the conventional screw type preform supply unit, reduce the device manufacturing cost, and prevent surface damage of the preform compared to when using the screw.

The in-star wheel unit 200 may be transported toward the turret assembly 300 by mounting the preform received from the in rail 106 in the pocket of the rotary transfer plate 210, respectively.

The turret assembly 300 is a pusher 350 along an ascending and descending direction perpendicular to the revolution direction while revolving a plurality of pushers 350 (pushers) including an adsorption mouse that adsorbs the preform of the in-star wheel unit 200 at a vacuum pressure. ) And raise or lower the preform.

For the raising or lowering operation of the pusher 350, the turret assembly 300 may be provided with a guide portion and a turret cam portion, as will be described in detail with reference to FIG.

The gate cutting unit 400 may serve to cut the gate formed at the lower portion of the preform with a cutter while supporting the lower portion of the preform revolving by the turret assembly 300 with a hole cup.

The preform pivot 500 may rotate the upper pulley formed on the upper portion of the pusher 350 by belt friction to rotate the preform in rotation.

The driving principle of the preform rotating unit 500 is disclosed in Korean Patent No. 10-0751266 and so on, and a detailed description thereof will be omitted.

However, the characteristics of the preform pivot 500 of the present embodiment, as will be described with reference to FIG. 3 below, the friction belt 501 of the preform pivot 500 is relatively far from the suction mouse of the pusher 350. It is arrange | positioned so that the upper pulley of the pusher 350 may contact. As a result, foreign matters of the friction belt 501 are prevented from flowing toward the suction mouse or the preform, which are relatively far from each other, thereby reducing inspection error.

In addition, another feature of the preform pivot 500 is further provided with a first belt tensioner 510, in which the tension of the friction belt 501 of the preform pivot 500 is properly adjusted or maintained in an optimized state. Can be.

As shown in FIG. 2 or 3, the first belt tensioner 510 is a tensioner bracket 511 coupled to either of the hollow supports 110, 120 erected on the mount 101 of the device frame 100. ), One end of the tensioner rod 513 is connected to the tensioner pulley 512 disposed inside the friction belt 501 of the preform pivot 500, and the pulley shaft of the tensioner pulley 512, and the tensioner rod 513. Tensioner rod 513 rotatably coupled to the other end of the tensioner bracket 511 and the spring supporter and tensioner bracket 511 of the upper end of one end of the tensioner rod 513 vertically upward of the tensioner pulley 512. It may include a tension spring 514 coupled between the spring support.

While the first inspection module 600 tracks the preform being rotated by the preform rotating unit 500, the 360 inspection front of the preform can be photographed, but only one common whole body tracking mirror can be used in an independent image capture unit. have.

Here, the whole body tracking mirror may correspond to a kind of reflector, and the driving principle of the whole body tracking mirror of the first inspection module 600 may be the same as the tracking principle of the reflector disclosed in Korean Patent No. 10-0751266. The same content is omitted here.

However, the first inspection module 600 may reduce the driving load by minimizing the size of the rotary driving unit connected to the whole body tracking mirror (for example, shortening the length of the rotating shaft), and will be described in detail with reference to FIG. 5 below. It is configured to enable high speed rotation or return.

The rotating damping unit 690 may play a role of slowing or stopping the rotation of the preform by the preform rotating unit 500 with the friction belt 691.

That is, the rotation damping part 690 pushes the friction belt 691 and the friction belt 691 which contact the upper pulley of the pusher 350 in the adjoining path | route of the upper pulley of the pusher 350, and the friction belt 691. The support pulley which is arrange | positioned adjacent to the revolving path of the upper pulley of (), and the tensioner pulley arrange | positioned inside the friction belt 691 can be arrange | positioned.

The rotation damping unit 690 decelerates or stops the rotation of the upper pulley of the pusher 350 by using sliding between the upper pulley of the pusher 350 and the friction belt 691 that are rotating and rotating. The rotation of the preform absorbed by the adsorption mouse of the pusher 350 can be slowed down or stopped.

This rotating damping portion 690 may also include a second belt tensioner 692 having the same configuration as the first belt tensioner 510, in which details of the second belt tensioner 692 are avoided in order to avoid redundant description. The description of the configuration will be omitted.

The out star wheel part 700 may play a role of transporting the preform to the out rail 107 by absorbing the preform from the turret assembly 300 while rotating in the arc direction.

Since the adsorption and transport principle of the out star wheel part 700 is disclosed in Korean Patent No. 10-0751266, etc., a detailed description thereof will be omitted.

However, the out star wheel part 700 is disposed between the sub vacuum distributor and the plurality of vacuum adsorption units, respectively, to form a radial structure, a three-way piping connector piped in the middle of the suction pipe, and a three-way piping connector to a place for communicating with outside air. An extended pressure reducing line and a pressure reducing switch coupled to the middle of the pressure reducing line are provided.

The depressurization switch of the out star wheel part 700 performs a switching operation of lowering the vacuum pressure without breaking the vacuum momentarily so as to discharge the preform in the adsorption state at a certain point and at the correct time, thereby minimizing the suction of the vacuum pressure. In this state, it can be temporarily held, and the damage of the adsorption pad part of a vacuum adsorption part can be prevented beforehand.

The second inspection module 800 may serve to inspect the inside of the neck and the neck top seal surface and the gate cutting portion and the bottom portion or the inner surface of the preform revolving by the out star wheel portion 700.

The ejector unit 900 may play a role of blowing out the preform determined to be defective from the out star wheel unit 700 by an air blow method and discharging it toward the collection box 920.

3 is a cross-sectional view of the turret assembly shown in FIG.

Referring to FIG. 3, the turret assembly 300 includes a plurality of hollow supports 110 mounted on the mounting base 101 of the apparatus frame, a top plate 108 supported by the hollow support 110, and a top plate ( A hollow post 301 installed downward from the center of the 108 and a main housing 302 installed on the mounting base 101 in a vertical downward position from the post 301.

The turret assembly 300 includes a main shaft 303 rotatably coupled to the inside of the main housing 302 and a driven gear 304 coupled to the lower end of the main shaft 303 to receive rotational force from the device driving means. It may include.

The device driving means further comprises a drive gear and a turret motor 305 gear-coupled to transmit rotational force to the driven gear 304 and an encoder 307 connected in synchronization with the timing pulley 306 under the driven gear 304. In addition, the constant speed drive of the turret assembly 300 can be realized.

The turret assembly 300 is coupled to the main shaft 303 to receive power, the turntable housing 308 is rotated based on the outside of the main housing 302 and a plurality of radially installed on the turntable housing 308 The hole cup holder 309 and the hole cup 310 may be interchangeably coupled to the ends of the hole cup holder 309, respectively.

Since the hole cup 310 rotates at the same time as the main shaft 303, it is possible to naturally balance the rotation with the pusher 350.

The hole cup 310 may have a bottom surface recessed to support a lower portion of the preform P, and a hole through which the gate G of the preform P may pass is formed in the recessed bottom surface of the hole cup 310. There may be.

Turret assembly 300 is a turret housing 311 and the turret is fixed to the end of the main shaft 303 by using a key and a fixing bolt after being inserted to match the center line (CL) to the end of the main shaft 303, A main vacuum distributor 312 may be coupled to the inner bearing of the housing 311 and bolted to the bottom of the post 301.

A distribution chamber 313 is formed at an upper portion of the main vacuum distributor 312, and a fluid transfer pipe 314 is coupled to an upper portion of the distribution chamber 313 to intake and discharge fluid from the distribution chamber 313. have. Fluid transfer tube 314 may be connected to a vacuum pump device (not shown).

Outside the main vacuum distributor 312 is coupled to the dispensing housing 315 rotatably coupled while maintaining airtightness.

Since the arc-shaped hole 316 is formed only within a predetermined arc angle section between the main vacuum distributor 312 and the dispensing housing 315, the dispensing chamber 313 and the main in the section where the arc-shaped hole 316 is located. The pipe joint 317 penetrates each other to receive the vacuum suction pressure, and in the section where the circular hole 316 is not provided, the distribution chamber 313 and the main pipe joint 317 are sealed to not receive the vacuum suction pressure. The arc-shaped hole 316 may refer to a hole having a long hole shape formed along the outer circumferential surface of the main vacuum distributor 312.

Thus, in this embodiment, since each pusher 350 does not have individual control means (for example, solenoid valve) as before, its vacuum dispensing structure is simple, and each solenoid valve operation deviation can be minimized, and manufacturing and management Easy

Meanwhile, the turret assembly 300 is coupled to the outer flange 311a of the turret housing 311 and includes a main turret 318 in which a plurality of pushers 350 are disposed, and a turret wall erected along the periphery of the main turret 318. 319, a turret cover 320 connecting the upper portion of the turret wall 319 and the lower portion of the dispensing housing 315, and the center line CL to the main vacuum distributor 312 as a vertical upper portion of the main turret 318. ) Is installed in the turret cam portion 330 so that the turret cam portion 330 and the first cam follower 354 of the pusher 350 move along the turret cam portion 330. A follower guide 340 for 354 may be included.

Here, the turret cover 320 and the main turret 318 are formed with a through-hole for the pusher to coincide with each other. In addition, the bushing 321 is coupled to the through hole of the main turret 318 to guide the lifting operation of the airtight pusher 350.

The pusher 350 has a surface roughness necessary for adsorption of the preform P, and is connected to the adsorption mouse 351 and the adsorption mouse 351 having a positioning protrusion 351a at the bottom of the adsorption mouse 351. A suction shaft 352 extending beyond the bushing 321 of the main turret 318 to the outside of the turret cover 320 and a guide portion 353 for guiding the suction shaft 352 based on the turret wall 319. And a first cam follower 354 provided at the guide portion 353, an upper pulley 355 coupled to the suction shaft 352 to the outside of the turret cover 320, and an upper end of the suction shaft 352. A pusher vacuum distributor 356 rotatably coupled to a bearing and a seal, and a pusher piping joint 357 piped to the pusher vacuum distributor 356, respectively.

Here, the positioning protrusion 351a has a height that is minimized between the bottom and bottom surfaces of the suction mouse 351 or a relatively low height as compared with the related art. The first pre-formed light source is installed at a position opposite to the first image capturing unit during screw or internal inspection of the neck of the preform P by the relatively low height alignment protrusion 351a (see FIG. 5). The image can be captured by the transmitted light, and the captured image is relatively bright according to the sufficient amount of light, and there is an error factor affecting the inspection image in addition to the preform that is the inspection object between the first light source and the first image capture unit. You can do it.

In addition, since the upper pulley 355 of the pusher 350 to be in contact with the friction belt 501 of the preform pivot 500 is relatively far from the suction mouse 351 of the pusher 350 compared to the prior art, the friction belt The foreign matter of 501 may not move toward the adsorption mouse 351 or the preform P which is relatively far away.

The pusher piping joint 357 may be connected to the main piping joint 317 through a connecting tube.

In addition, the guide part 353 is a guide rail 353a arranged on an inner circumferential surface of the turret wall 319 and a guide block 353b sliding along the guide rail 353a in correspondence with the number and the mounting positions of the pushers 350. It can be composed of).

The guide block 353b is coupled to the suction shaft 352, and the first cam follower 354 is mounted on the block surface opposite to the guide rail 353a.

The turret cam portion 330 has a cam profile that supports the first cam follower 354 below the first cam follower 354 of the pusher 350.

The follower guide 340 is bent at a right angle at a position corresponding to the top and bottom points of the first cam follower 354 to prevent or guide the departure of the first cam follower 354 upwardly. It is supposed to be.

A portion that is bent at right angles to the follower guide 340 may further include means for providing a restoring force by elasticity (for example, a plate-shaped guide or a restoring spring).

Since the turret cam portion 330 that controls the movement of the pusher 350 is located below the first cam follower 354 of the pusher 350, the pusher 350 reaching the bottom dead center has a constant period, that is, a cam profile. The pusher 350 causes an upward movement in a cycle corresponding to the.

In addition, the pusher 350 reaching the top dead center may reach the bottom dead center by downwardly moving by the weight of the pusher 350 itself.

In the turret assembly 300, the members rotating simultaneously for revolving the preform P are driven gear 304, timing pulley 306, main shaft 303, turntable housing 308, hole cup holder 309, and hole cup. 310, turret housing 311, main turret 318, turret wall 319, turret cover 320, pusher 350, and dispensing housing 315.

In the turret assembly 300, a member that does not rotate for revolving the preform P may be a hollow support 110, a top plate 108, a post 301, a main housing 302, a main vacuum distributor 312, and a fluid transfer. The tube 314 and the turret cam portion 330.

In particular, when the pusher 350 moves downward along the inclined section of the turret cam unit 330 immediately before entering the cutting section of the gate G of the preform P, the hole cup 310 is formed of the preform P. At the same time, the vertical bottom revolves, so that the preform (P) can be seated in the hole cup (310).

At this time, the preform P is in a state of being adsorbed by the adsorption mouse 351 of the pusher 350, and the gate G of the preform P protrudes downward through the hole of the hole cup 310.

In this state, the preform P and the hole cup 310 may be moved toward the gate cutting part 400 shown in FIG. 4.

As shown in FIG. 4, the gate cutting unit 400 may be erected on the mounting base 101 of the apparatus frame.

The gate cutting unit 400 seats the preforms P and P 'by the hole cup 310, and cuts the gate G protruding below the bottom of the hole cup 310 through the holes of the hole cup 310. The 410, the cutter bracket 420 provided with the cutter 410, the transfer block 430 connected to the side of the cutter bracket 420, the transfer block 430 and the cutter bracket 420 in the vertical direction A transfer bed 440 installed on the mounting base 101, a screw shaft 450 rotatably installed on the transfer bed 440, screwed with the transfer block 430, and a screw shaft 450. It may include a handle 460 for rotating the shaft coupled to the end of the.

By the gate cutting unit 400, the gap between the cutter unit 410 and the hole cup 310 can be finely adjusted by operating the handle 460, there is an advantage that can easily set the device. .

In particular, as the preforms P and P 'are transported and cut while being supported by the suction mouse 351 and the hole cup 310 of the pusher 350 corresponding to two points, the preforms P and P' are formed. ), The gate G cutting plane is formed horizontally, and high quality cutting quality can be obtained.

On the other hand, the preform (P) may have a long and short body length for each size.

Correspondingly, the present embodiment further includes adapters 390 and 391 interposed between the hole cup holder 309 and the hole cup 310 so as to seat the preform P 'having a relatively short body. It may include.

That is, the adapters 390 and 391 have a body in which bolt holes are processed to be disassembled and assembled, and the first adapter 390 having a relatively short length for the preform P having a large trunk length size, and a body For the preform P 'having a small length size, a set of second adapters 391 having a relatively long length can be provided and used in this embodiment.

5 is a cross-sectional view of the whole body tracking mirror and the first inspection module shown in FIG. 2.

Referring to FIG. 5, the first inspection module 600 includes a whole body tracking mirror 610 having an area corresponding to a 360 degree front surface of the neck and the body of the preform, and a mirror base coupled to a lower portion of the whole body tracking mirror 610. 611, a mirror driven shaft 612 coupled to the bottom of the mirror base 611, and an extension bar 613 connected to the bottom of the mirror driven shaft 612 and extending to one side.

The first inspection module 600 includes a second cam follower 614 coupled to the lower end of the extension bar 613, and a mirror cam part 615 disposed in close contact with the side of the second cam follower 614. And a frame spring support coupled to the frame 617 on which the mirror spring support 616, which is erected on the upper end of the extension bar 613, and the mirror cam part 615 are mounted to the vertical upper portion of the second cam follower 614. 618 and a mirror restoring spring 619 coupled between the mirror spring support 616 and the frame spring support 618.

The first inspection module 600 is a cam drive shaft 620 for rotating the mirror cam portion 615, and a cam pulley 630 is coupled to the lower portion of the cam drive shaft 620 and receives a rotational force through the belt of the device drive means It may include.

In the first inspection module 600, since the mirror cam part 615 and the second cam follower 614 are installed relatively close to the lower portion of the mirror driven shaft 612, the mirror cam part 615 and the second cam are relatively close to each other. According to the cam operation of the follower 614, the mirror cam unit 615 may be rotated at a high speed, and then the mirror cam unit 615 may be returned by the mirror restoration spring 619.

The first inspection module 600 can simplify the structure, reduce the manufacturing cost, reduce the difficulty of assembly and processing, and can significantly lower the frequency of failure.

Meanwhile, the first inspection module 600 includes a first image capture unit 640 (eg, a line) disposed at one side of the whole body tracking mirror 610 to take a neck image of the preform through the top of the whole body tracking mirror 610. Scan camera), a second image capturing unit 650 disposed under the first image capturing unit 640 to capture the torso image of the preform through the lower part of the whole body tracking mirror 610, and the neck and torso of the preform. The light source 660 may include a first light source 660 (see FIG. 2) disposed at a position opposite to the whole body tracking mirror 610 with the preform at the center so as to reach the whole body tracking mirror 610.

Alternatively, the first inspection module 600 may include a first image capture unit 640 disposed on one side of the whole body tracking mirror 610 and a second image capture unit disposed below the first image capture unit 640. It may be configured as including a portion 650 and a first light source 660 disposed at the position irradiating the preform.

Light transmitted through the preform from the first light source 660 reaches the first image capture unit 640 and the second image capture unit 650 via the whole body tracking mirror 610, and is inserted into the preform. Since the foreign matter or surface defects do not transmit the irradiated light or a change (reduction) change in the amount of transmission occurs, the first image capture unit 640 and the second image capture unit 650 detect this change as a foreign matter. .

The second image capturing unit 650 includes a 2-1 image capturing unit 651 for capturing a torso of a preform having a small trunk length, and a 2-1 image capturing unit for capturing a preform with a large torso length. The second image capture unit 652 may be disposed below the 651.

The first inspection module 600 captures a 360 degree front surface of the preform being rotated by independent first and second image capture units 640 and 650 and the whole body tracking mirror 610.

6 is a cross-sectional view of the out star wheel unit having the pressure reducing switch in FIG. 2.

Referring to FIG. 6, the out star wheel unit 700 is a device for rotating the adsorbed preform, and may further include a decompression switch 760.

For example, the out star wheel part 700 includes a hollow rotating shaft 702 rotated inside the wheel housing 701, a wheel frame 703 coupled to an upper portion of the hollow rotating shaft 702, and an inside of the hollow rotating shaft 702. A vacuum post 704 disposed on the vacuum post 704, a sub vacuum distributor 710 disposed on the vacuum post 704, and a plurality of vacuum suction units 720 arranged at equal intervals along the outer ring of the wheel frame 703. And a suction pipe 730 disposed between the sub vacuum distributor 710 and the plurality of vacuum suction units 720 to form a radial structure, a three-way piping connector 740 piped between the suction pipe 730, and a three-way pipe. Decompression line 750 extending from the connector 740 to the outside air communication, decompression line 750 coupled in the middle of the decompression line 750 and the position that requires decompression in the rotation section of the out star wheel part 700 Mechanical contact member 770 is installed to correspond to the on-off pressure reducing switch 760 Or electrical switching means.

For example, the decompression switch 760 is a piston provided inside the decompression switch 760 by mechanical contact between the third cam follower 761 at the end of the operating shaft of the piston of the decompression switch 760 and the cam contact mechanical contact member. It can be configured as a kind of relief valve structure for opening and closing the flow path by moving.

In addition, although the pressure reducing switch 760 is not shown, the sensor and the solenoid may be configured to move the piston of the pressure reducing switch 760.

In the out star wheel part 700 having such a configuration, the vacuum adsorption part 720 adsorbs the preform.

During the adsorption, the decompression switch 760 switches between the basic vacuum pressure and the pressure necessary to maintain the minimum adsorption so as to lower the vacuum pressure without destroying the vacuum at a certain point in order to discharge the preform at a certain point in time. Can play the role of switching.

For example, when the preform of the out star wheel part 700 reaches the preform discharge position, the decompression switch 760 switches the vacuum decompression line 750 from the closed state to the open state according to an electrical or mechanical signal, thereby vacuum adsorbing part 720. To lower the vacuum pressure. At this time, in order to maintain the vacuum pressure of the vacuum adsorption unit 720, the sub vacuum distributor 710 must maintain the vacuum intake.

In addition, as shown in Figure 2, the preform adsorbed to the out star wheel portion 700 of the minimum adsorption force may be discharged by the air blower 910 for discharge in the discharge position.

That is, the ejector unit 900 is disposed on the opposite side of the air blower 910 with the air blower 910 connected to the mounting base 101 of the apparatus frame 100 under the out star wheel unit 700 and the preform therebetween. It may include an installed collection box 920.

Referring to FIG. 2, the second inspection module 800 includes a neck top seal surface inspection unit 850 and a neck top seal surface inspection unit disposed along a transfer path of the preform. The gate cutting part and the bottom part inspection part 810 disposed on one side of the transfer path, the neck internal inspection part 830 and the neck internal inspection part 830 arranged on the other side of the transfer path, are replaced and installed on the basis of 850. Possible neck inner surface inspection unit 830a (see FIG. 9).

FIG. 7 is a side view of the second inspection module, the gate cutting portion, and the bottom portion inspection portion illustrated in FIG. 2.

Referring to FIG. 7, the second inspection module 800 includes a module post 801 mounted on the mounting base 101 of the device frame, a scale indicator 802 horizontally installed in the middle of the module post 801, and a module. An upper cylinder support 803 supported by the post 801, a lifting cylinder 804 provided on the upper cylinder support 803, and guides disposed on both sides of the lifting cylinder 804 and installed on the upper cylinder support 803. And an elevating plate 808 suspended from the bushing 805, the actuating rod 806 of the elevating cylinder 804, and the guide shaft 807 of the guide bushing 805.

The gate cutting part and the bottom part inspection part 810 are installed on the lifting plate 808 to inspect the gate cutting part and the bottom part of the preform P through the first plate through hole 809a of the lifting plate 808. The image capturing unit 811 may include a second light source 812 installed on the mounting base 101 of the device frame below the vertical portion of the preform P to irradiate light toward the preform P.

When the second light source 812 illuminates the lower part of the preform P, the third image capturing part 811 of the gate cutting part and the bottom part inspecting part 810 captures an inner bottom image of the preform P. By checking whether the gate of the preform (P) is cut properly or not.

FIG. 8 is a side view of the neck internal inspection unit of the second inspection module illustrated in FIG. 2.

Referring to FIG. 8, the neck internal inspection unit 830 is a device for inspecting foreign matter in the neck of a preform P having a neck before non-crystallization or crystallization.

The neck internal inspection unit 830 includes a ring-shaped first base plate 831 installed in the second plate through hole 809b of the elevating plate 808, and a first vertically installed on one upper surface of the first base plate 831. The vertical mount 832, the fourth image capture unit 833 installed to face the focus downward from the first vertical mount 832, and the telecentric lens 834 mounted to the fourth image capture unit 833. And a third light source 835 disposed below the vertical portion of the neck internal inspection unit 830 to irradiate light toward the preform P.

The telecentric lens 834 does not change the magnification of the preform P as the object distance changes, so that the planar object of the preform P can be viewed and displayed at the same perspective angle, and thus three-dimensional as in the standard lens. Since the characteristic does not appear due to perspective distortion or image position error, it is possible to increase the discriminating power of foreign matter that may exist inside the preform neck.

In addition, the neck internal inspection unit 830 may use the telecentric lens 834 to minimize the distance between the preform P and the lower end of the telecentric lens 834 of the fourth image capturing unit 833. have.

 The first light source 660 of FIG. 2 or 5, the second light source 812 of FIG. 7, the third light source 835 of FIG. 8, and the fourth light source 855 of FIG. 10 are red light source elements and infrared (IR) light sources. ) Light source device and green light source device can be used in combination.

Here, the red light source or the infrared light source element transmits the inside of the preform P to brighten the image generated in the image capturing device, while foreign matter contained in the preform P neck is captured as a bright image. In that case, the discernment may be difficult.

In order to compensate for this, in the present embodiment, a green light source element is used in combination with a red light source element, or a green light source element is used in combination with an infrared light source element, thereby generating a difference in the amount of transmitted light to a foreign material. In addition, it can increase the discrimination ability of foreign matter.

Meanwhile, in the present exemplary embodiment, the neck inner surface inspecting portion 830a of FIG. 9 may be replaced and replaced instead of the neck inner inspection portion 830 of FIG. 8.

FIG. 9 is a side view of the neck inner surface inspection unit which may be replaced with the second inspection module illustrated in FIG. 2.

Referring to FIG. 9, the neck inner surface inspection unit 830a is an opaque neck after crystallization, that is, the body of the preform P is transparent, such as a juice PET bottle, but the neck of the neck when the neck of the preform P is opaque due to crystallization. It is a device for inspecting foreign substances on the neck inner wall.

The neck inner surface inspection unit 830a includes a mirror light source holder 836 which is replaced in the second plate through hole 809b of the elevating plate 808, and a second vertical mount installed perpendicular to one upper surface of the mirror light source holder 836. 837 and the fifth image capturing unit 838 installed to face the focus downward in the second vertical mounting table 837.

Here, the mirror light source holder 836 is spaced apart from the upper side of the fallopian tubular reflector 836a and the fallopian tubular reflector 836a installed inside the mirror light source holder 836, and is located inside the mirror light source holder 836. A first internal light source element 836b, which is arranged in a circular shape and irradiates light toward an inner surface of the fallopian reflector 836a, is spaced apart from the outside of the fallopian reflector 836a, and is located inside the lower portion of the mirror light source holder 836. The second internal light source element 836c which is arranged in a circular shape and irradiates light toward the outer periphery of the neck of the preform P may be included.

The fifth image capturing unit 838 may play a role in generating an image inside the neck of the preform P, and the fallopian tube-shaped reflector 836a of the mirror light source holder 836 may have an inner surface of the preform P neck. It may play a role of securing an optical path with the fifth image capture unit 838.

The neck inner surface inspection unit 830a captures instantaneous images of the inner surface of the neck that are difficult to acquire directly with a fifth image capture unit 838 using a mirror light source holder 836 having a fallopian tube reflector 836a. Can be realized, and the speed of image acquisition can be realized.

One fifth image capturing unit 838 has an image flatness, less image distortion, and easy correction compared to capturing an image by conventional multi-angle photography.

FIG. 10 is a side view of a neck top seal surface inspection unit of the second inspection module illustrated in FIG. 2.

Referring to FIG. 10, the neck top seal surface inspection unit 850 serves to inspect the top seal surface P1 of the neck of the preform P.

The neck top seal surface inspection unit 850 is vertically installed on a ring-shaped second base plate 851 provided in the third plate through hole 809c of the elevating plate 808 and one upper surface of the second base plate 851. Between the third vertical mount 852, the sixth image capture unit 853 and the sixth image capture unit 853 and the preform P installed so as to focus downwards from the third vertical mount 852. The outside of the third vertical mount 852 along the direction perpendicular to the optical path between the half mirror 854 and the sixth image capturing unit 853 and the preform P supported by the interior of the third vertical mount 852. It may include a fourth light source 855 supported at.

At this time, the half mirror 854 is positioned so that the light irradiated from the fourth light source 855 can be irradiated to the top seal surface P1 of the neck of the preform P, and the light reflected from the top seal surface P1 is used. The light penetrates toward the sixth image capture unit 853.

In this case, an anti reflector glass 856 is further provided between the half mirror 854 and the preform P to remove the diffuse reflection of the light reflected from the preform P.

In addition, the sixth image capturing unit 853 may further include a telecentric lens 857 to enlarge the discriminating power of the image of the preform P and the inspection area.

Hereinafter, a preform inspection method by the preform inspection apparatus according to the present embodiment will be described.

11 is a flowchart illustrating a preform inspection method according to the present embodiment.

Referring to FIG. 11, the preform inspection method according to the present embodiment may correspond to a foreign material detection method of the screw portion of the preform in more detail.

Conventional neck screw inspection using conventional frame cameras requires time-lapse photographing of the rotating preform to analyze the image to observe the overall appearance of the preform. This conventional analysis method has a disadvantage in that misclassification is likely to occur due to the black pixels of the screw in the area-based detection. To solve this problem, a complicated step requiring a large amount of computation is required.

On the other hand, the preform inspection method of the present embodiment can accurately and quickly detect foreign substances by normalizing the shape of the screw and automatically separating the screw portion of the screw image from the whole image.

This embodiment corresponding to the foreign matter inspection method for the screw portion of the neck of the preform is the image input step (S10), the inspection area setting step (S20), the preform foreign matter presence determination step (S30) (normal / Failure determination).

Image input step (S10) is a computer 104 shown in Figure 2 is a first image capture unit 640 of the first inspection module 600 to the vertical component of the image for the screw portion of the preform neck for a predetermined time It may be a process of acquiring the photographed image which is the entire screw image by sequentially photographing.

In the inspection area setting step (S20), the computer 104 automatically synthesizes three captured images, which are the whole images of the screw, to create a composite image so that the computer 104 may automatically set a candidate area for performing the foreign matter inspection, and then examines the synthesized image. After rearranging to the reference image, the operation of separating the screw line and the background portion of the screw may be performed to set the reference image and the multiple inspection area for the inspection based on the screw start protrusion.

In the preform foreign matter determination step (S30), the computer 104 analyzes the contrast of the pixels for the multiple inspection areas of the set screw, and if there is at least one pixel that exceeds the threshold value in the form of a lump or larger, a defective preform. Otherwise it may be a process of determining a normal preform.

12 is a plan view showing a method of acquiring a neck outer surface image of an orbiting and rotating preform.

Referring to FIG. 12, as described in detail above, the first inspection module 600 includes the whole body tracking mirror 610 with respect to the preform P rotating by the preform pivot while rotating by the turret assembly 300. By using the first image capture unit 640, the vertical components of the image of the screw portion of the preform neck are sequentially photographed for a predetermined time to acquire the entire screw image and then transmitted to the computer.

Here, for example, three images that are sequentially photographed for a predetermined time may be formed.

In addition, since the preform rotates during idle, it is not known at which position the neck screw of the preform passes in front of the first inspection module 600, and it is necessary to normalize the shape of the screw in such a situation.

FIG. 13 is a drawing substitute photograph showing a captured image of a preform, showing one of three images of the skew-like portion of the neck of the preform.

Here, reference numeral D denotes an uppermost protrusion of the screw (hereinafter, abbreviated as 'top protrusion'), and reference numeral E denotes a preform left and right entry positions, and reference numeral Y denotes a region of interest (ROI).

FIG. 14 is a flowchart for explaining details of an inspection area setting step illustrated in FIG. 11.

Referring to FIG. 14, the inspection area setting step S20 may include a first step S210 of searching for a preform entry position and a top protrusion position, a second step S220 of matching and rearranging a circular cue form, and checking A third step S230 of automatically adjusting the area may be included.

That is, the inspection area setting step (S20) is a detailed process of the three steps (S210, S220, S230).

In the first step (S210), the entry position and the top protrusion position of the preform are searched for in the photographed image, which is a preform image photographed with a 360 degree front surface.

In the second step (S220) is to match the photographed image in the form of a circular cue and rearranged according to the reference to form a reference image.

In the third step S230, the area to be inspected is automatically adjusted for the gap between the screws broken in the vertical direction in the reference image.

FIG. 15 is a flowchart of a location search step shown in FIG. 14.

Referring to FIG. 15, in the case of the first step S210, which is a position search step, when the parallel reference to FIG. 13 is performed, screws in an image of the neck of the preform are vertically arranged. This may mean that pixels photographed in the lower direction from the top of the preform are arranged in the horizontal direction.

In the first step (S210), the entrance position of the preform and the top protrusion position of the preform located in the horizontal direction in the image are searched from left to right, but the flow is as shown in FIG. 15.

The first step S210 may include an entry position search step S211 of the preform and a top position projection step S212 of the preform.

The entry position of the preform in the image has a shift in the horizontal direction. This is a factor that occurs in the shooting environment, and the mechanical characteristics may not always have the same position. Therefore, a reference position is required, and a reference position is searched in the entry position search process.

That is, in the step S211 of entering the preform in the first step S210, the computer performs projection in the horizontal direction at the ROI (see reference numeral Y in FIG. 13), and preforms 50% of the maximum and minimum projection values. Determine the entry position of.

The range of ROI (Y) can be arbitrarily determined by computer input processing.

Thereafter, as shown in FIG. 12, photographing is performed line by line in a predetermined section, and all the lines are combined to form an image. Since you are shooting a rotating preform, the projections cannot always be the same shape.

Therefore, one more position to be referred to for the operation of the second step S220 should be searched, which is the uppermost protrusion position.

That is, in the step S212 of searching for the top protrusion position of the preform of the first step S210, the computer performs binary projection measurement in the area A (see reference numeral A in FIG. 13) and the run-length for the black pixel. The length measurement and the adjacent position of the max-length are determined as the uppermost protrusion position.

FIG. 16 is a flow chart of the redeployment step shown in FIG. 14.

Referring to FIG. 16, the shape of the screw may be seen as different in the image of the entire front surface of the preform, but the repeated shape may have a matching characteristic. Even if the front of the preform is shot more than twice by rotating a lot in the same shooting section, the repeated form is always constant. Therefore, it is possible to inspect the contamination by using only one shooting section corresponding to the front side.

In a second step (S220), the computer image-processes the photographed front surface of the preform corresponding to 1x, and rearranges it into a reference image having a consistent shape.

For example, the second step S220 includes an upper and lower matching step S221 and an image rearranging step S222.

In the upper and lower matching step S221 of the second step S220, the word matching means matching the same or similar, and is a process of finding the front pixel corresponding to 1x in the image. If the image was taken 1.1 times, the result of this process is to exclude 0.1 times.

The second step S220 may be described with reference to FIG. 17.

FIG. 17 is a drawing substitute photograph for explaining the steps of FIGS. 14 and 15.

In FIG. 17, the left side of the drawing may be in an upper direction and the right side of the drawing may be in a lower direction.

Referring to FIG. 16 or 17, in the upper and lower matching step S221 of the second step S220, the computer replicates three shot images M, which are the entire screw images, of each shot image M. FIG. By using a template for the region of the upper predetermined size (Q) defined by the upper (T) or lower (L) by using a template, and by placing the image based on the position information, the captured image (M) 3 The dog produces a composite image (V). That is, the upper and lower matching step (S221) may be a process of making a composite image (V) by matching in the form of a circular cue using the captured image (M), which is a preform image photographed 360 degrees in front.

Here, the template may be a computer algorithm that finds a point most similar to each other with respect to a portion of each of the top (T) or bottom (L) images of the three captured images (M), which are pre-prepared in the computer. May be limited to a portion of the upper portion T and the lower portion L, thereby quickly creating a composite image V. FIG.

In addition, in the image rearranging step (S222) of the second step (S220), the computer detects the information of the top protrusion location (S212) and the upper and lower matching steps (S221) of the preform (the location of the top protrusion). It may be a process of re-interpreting the synthesized image (V) based on the coordinate value, and the synthesized image information for, and rearranging the preform front pixels corresponding to 1 times to the reference image (R).

That is, in the image rearranging step S222 of the second step S220, the computer fixes the top projection position of the screw at a consistent position, and rearranges the preform front pixels, thereby reconstructing the reference image to be examined from the composite image V. R) may be a process of extracting.

FIG. 18 is a flowchart of the adjustment step shown in FIG. 14, and FIG. 19 is a drawing substitute photograph for explaining the step shown in FIG. 18.

Before describing FIG. 18, referring to FIG. 13, the protrusions corresponding to the screws of the neck of the preform represented by the diagonal lines are cut in the horizontal direction. The portions (N1, N2, N3) of which the projections are broken are passages for discharging gas of PET bottle contents to be made by the preform, and have a transition from top to bottom in the image. This is the result of expressing long and short as the preform rotates.

Therefore, the projection cut | disconnected in the horizontal direction requires the function which automatically adjusts a test section.

For this purpose, referring to FIG. 18 or 19, in the third step S230, which is an adjustment step, the computer inspects the automatic adjustment areas (91 and 92 of FIG. 19) with respect to portions where projections of the reference image are broken. In this case, the inspection method may be performed in the same manner as the method of determining the preform as defective if the defective pixel U is found in one of the two regions in the following step of determining whether the preform is present or not (S30). .

Further, in the third step S230, the computer projects the horizontal direction in the ROIs 81 and 82, and the automatic inspection areas 91 and 92 between the projections by the threshold value using the intensity distribution of the screw area and the background area. It may be a process of determining the position of.

In this case, the reference factor for determining the position between the protrusions may be that the pixels of the protrusions are close to black.

In this way, the computer may set automatic inspection areas 91 and 92 between the projections and the projections by using the accumulated information on the reference factors.

20 is a drawing substitute photograph for explaining a preform foreign matter presence determination step.

In the preform foreign matter determination step (S30), the contrast and agglomeration of the pixels of the area with respect to the automatic inspection area 93 obtained by the computer through the third step S230 or the manual inspection area 94 received by manual input. Referencing the size may be a process of performing a determination of normal and defective.

At this time, in the step S30 of determining whether the preform is present, if the bad pixel U is found even in one of the two areas and the number of accumulations is large, the computer determines that the preform is bad.

Such a determination result can be stored and managed in a computer as preform inspection result data.

21 is a drawing substitute photograph for explaining a preform character recognition method according to a preform inspection method.

Referring to FIG. 21, the preform checking method according to the present embodiment includes a preform character recognition method.

The preform character recognition method may be characterized by recognizing a mold number of the neck of the preform by processing a cylindrical preform neck shape into a planar image.

That is, in the preform character recognition method, a reference image of the neck of the preform is obtained through the image input step S10 and the inspection region setting step S20 described above with reference to FIG. 11.

In the preform character recognition method, after the inspection region setting step (S20), the computer recognizes between the first jaw V1 and the second jaw V2, which are mold characteristics, in the reference image as the character recognition target area ROI, and recognizes the text. Set a plurality of search start points inside the target area, set a plurality of search end points outside the character recognition target area, and include the test start point and the test end point Within the area defined by the search width and mold region width, the text objects to be recognized are selected through clustering, and each character is separated by projection to form a mold number (eg, a combination of numbers and letters). Extracting the mold number, and recognizing the extracted mold number as a cluster neural network classification unit of the computer and displaying the extracted mold number on the operation panel of the preform inspection apparatus.

The neural network classifier normalizes the extracted mold number to 32 x 32 size and codes 256 real numbers by characterizing the structural shape of the mold number according to the direction and distance. The code value is calculated with the weight of the trained neural network so that the neural network classifier can recognize the mold character in a manner of classifying the character with the highest reliability.

 In addition, the mold is given the mold number which is a unique number, respectively as a template which produces a preform. This mold defect is very deadly to preform production. Therefore, defects in the mold can be identified in conjunction with the preform inspection result data.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. For example, a person skilled in the art can change the material, size and the like of each constituent element depending on the application field or can combine or substitute the embodiments in a form not clearly disclosed in the embodiment of the present invention, Of the range. Therefore, it should be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive, and that such modified embodiments are included in the technical idea described in the claims of the present invention.

100: device frame 101: mount
106: in rail 107: out rail
200: in star wheel part 300: turret assembly
350: pusher 400: gate cutting portion
500: preform rotating part 600: first inspection module
690: rotation damping unit 700: out star wheel part
800: second inspection module 900: ejector unit

Claims (18)

An in-rail installed on one side of the device frame along the movement path of the preform,
An in-star wheel part for receiving the preform through a smooth curved border portion of the in rail, and seating the preform in a pocket of a rotation transfer plate, respectively, to rotate the preform;
A turret assembly which raises or lowers the pusher and the preform by a guide part and a turret cam part while adsorbing and revolving the preform of the in-star wheel part with a suction mouse of a pusher;
A gate cutting part for cutting the gate of the preform with a cutter while supporting a lower portion of the preform revolving by the turret assembly with a hole cup;
A preform rotating part rotating the upper pulley formed on the pusher by belt friction to rotate the preform in idle operation;
A first inspection module for inspecting a neck and a body of the preform rotating in the turret assembly;
An out star wheel part for absorbing and rotating the preform from the turret assembly;
A second inspection module for inspecting the inside of the neck of the preform of the out star wheel part, the neck top seal surface, the gate cutting part and the bottom part or the inner surface of the neck;
And an out rail installed on the other side of the apparatus frame adjacent to the out star wheel part to transport the preform that has been inspected.
Preform Inspection System.
The method of claim 1,
Further comprising a rotating damping unit between the first inspection module and the out star wheel portion to reduce or stop the rotation of the preform
Preform Inspection System.
The method of claim 1,
And an ejector portion having an air blower connected to the mounting frame of the apparatus frame below the out star wheel portion, and a collection box installed on the opposite side of the air blower with the preform interposed therebetween.
Preform Inspection System.
The method of claim 1,
The turret assembly,
A hollow support erected on the mounting frame of the apparatus frame,
An upper plate supported by the hollow support,
A hollow post installed downward from the center of the upper plate,
A main housing installed in the mounting table in a vertical downward position from the post;
A main shaft rotatably coupled inside the main housing;
A driven gear coupled to the lower end of the main shaft to receive rotational force from the device driving means;
A turntable housing coupled to the main shaft to receive power, and being rotated based on the outside of the main housing;
A plurality of hole cup holders installed in the radial direction in the turntable housing;
A hole cup that is interchangeably coupled to each end of the hole cup holder,
A turret housing fixed to an end of the main shaft,
A main vacuum distributor coupled to the inner bearing of the turret housing and bolted to the bottom of the post;
A dispensing housing rotatably coupled while maintaining airtightness outside the main vacuum distributor;
Preform Inspection System.
The method of claim 4, wherein
The turret assembly,
A main turret coupled to the outer flange of the turret housing and having a plurality of pushers disposed therein;
Turret wall erected along the outer periphery of the main turret,
A turret cover connecting an upper portion of the turret wall and a lower portion of the distribution housing;
A turret cam portion installed by matching a center line with the main vacuum distributor to a vertical upper portion of the main turret;
A follower guide installed in the turret cam part to guide the first cam follower;
Preform Inspection System.
The method of claim 5, wherein
The pusher
An adsorption mouse having a surface roughness necessary for adsorbing the preform and having a alignment protrusion at the bottom of the adsorption mouse;
A suction shaft connected to the suction mouse and extending past the bushing of the main turret to the outside of the turret cover;
A guide part for guiding the adsorption shaft based on the turret wall;
The first cam follower provided in the guide part;
An upper pulley coupled to the suction shaft to the outside of the turret cover;
A pusher vacuum distributor rotatably coupled to a bearing and a seal at an upper end of the suction shaft;
A pusher tubing joint piped to the pusher vacuum distributor
Preform Inspection System.
The method of claim 5, wherein
The turret cam portion,
A cam profile supporting the first cam follower below the first cam follower of the pusher;
Preform Inspection System.
The method of claim 1,
The gate cutting unit,
A cutter part seated on the hole cup to cut a gate protruding below the bottom of the hole cup;
A cutter bracket provided with the cutter unit,
A transfer block connected to a side of the cutter bracket,
A transfer bed installed on a mounting table to guide the transfer block and the cutter bracket in a vertical direction;
A screw shaft rotatably installed in the transfer bed and screwed to the transfer block;
A shaft rotating handle coupled to the end of the screw shaft;
Preform Inspection System.
The method of claim 1,
The first inspection module,
A whole body tracking mirror having an area corresponding to a 360 degree front surface of the neck and the body of the preform,
A mirror base coupled to a lower portion of the whole body tracking mirror,
A mirror driven shaft coupled to a lower portion of the mirror base,
An extension bar connected to a lower portion of the mirror driven shaft and extending to one side;
A second cam follower coupled to a lower end of the extension bar;
A mirror cam part disposed in close contact with a side of the second cam follower;
A mirror spring support erected on an upper end of the extension bar with a vertical upper portion with the second cam follower,
A frame spring support coupled to the frame on which the mirror cam portion is mounted;
A mirror restoring spring coupled between the mirror spring support and the frame spring support,
A cam drive shaft for rotating the mirror cam portion;
A cam pulley coupled to a lower portion of the cam drive shaft and receiving rotational force through a belt of a device driving means;
Preform Inspection System.
The method of claim 9,
The first inspection module,
A first image capture unit disposed at one side of the whole body tracking mirror,
A second image capture unit disposed below the first image capture unit;
A first light source disposed at a position opposite to the whole body tracking mirror with the preform in the center;
Preform Inspection System.
11. The method of claim 10,
The second image capture unit,
A 2-1 image capture unit for photographing a torso of a preform having a small torso length;
It includes a 2-2 image capturing unit disposed under the 2-1 image capturing unit for capturing a preform having a large trunk length size
Preform Inspection System.
The method of claim 1,
The out star wheel part,
A hollow rotating shaft rotated inside the wheel housing,
A wheel frame coupled to an upper portion of the hollow rotating shaft;
A vacuum post disposed inside the hollow rotating shaft,
A sub vacuum distributor disposed above the vacuum post;
A plurality of vacuum suction units arranged at equal intervals along the outer ring of the wheel frame;
A suction pipe disposed between the sub vacuum distributor and the plurality of vacuum suction units to form a radial structure;
Three-way piping connector piped in the middle of the suction pipe,
A decompression line extending from the three-way pipe connection portion to the outside air;
A decompression switch coupled to the middle of the decompression line;
A mechanical contact member or an electrical switching means installed to correspond to a position requiring decompression in the rotation section of the out star wheel part to turn the decompression switch on and off;
Preform Inspection System.
The method of claim 1,
The second inspection module,
A module post erected on the mounting frame of the device frame,
A graduation indicator horizontally installed in the middle of the module post,
An upper cylinder support supported by the module post,
A lifting cylinder installed on the upper cylinder support;
Guide bushings disposed on both sides of the elevating cylinder and installed on an upper cylinder support;
And a lifting plate suspended from the operating rod of the lifting cylinder and the guide shaft of the guide bushing.
Preform Inspection System.
The method of claim 13,
The second inspection module,
A ring-shaped first base plate provided in the second plate through hole of the elevating plate,
A first vertical mount installed vertically on an upper surface of one side of the first base plate,
A fourth image capturing unit installed to face down in the first vertical mounting bracket;
A telecentric lens mounted in the fourth image capture unit,
And a neck internal inspection unit having a third light source disposed under the vertical portion of the neck internal inspection unit and irradiating light toward the preform.
Preform Inspection System.
The method of claim 2,
The preform rotating part or the rotating damping part further includes a belt tensioner,
The belt tensioner,
A tensioner bracket coupled to any one of the hollow supports erected on the mounting frame of the apparatus frame,
A tensioner pulley disposed inside the friction belt of the preform rotating part or the rotating damping part;
A tensioner rod connecting one end of the tensioner rod to the pulley shaft of the tensioner pulley and rotatably coupling the other end of the tensioner rod to the tensioner bracket;
A tension spring coupled between a spring support on one end of the tensioner rod and a spring support of the tensioner bracket in a vertical direction above the tensioner pulley.
Preform Inspection System.
In the inspection method made by a preform inspection apparatus having a first image capture unit and a computer of the first inspection module,
The computer,
An image input step of sequentially photographing vertical components of the image of the screw portion of the preform neck with the first image capturing unit for a predetermined time period to obtain a whole image of the screw;
Create a composite image by copying and synthesizing the photographed image into three, rearranged into a reference image to be examined in the synthesized image, and then performing a calculation to separate the screw line and the background part of the screw, for inspection based on the screw start projection. An inspection region setting step of setting a reference image and a multiple inspection region;
Analyzing the brightness of the pixels for the multiple inspection areas of the set screw to determine whether there are at least one pixel in the form of agglomerate more than a predetermined size in the form of a bad preform, otherwise determine the preform foreign matter presence or not a normal preform To do
Preform inspection method.
17. The method of claim 16,
The inspection area setting step,
A first step of searching for an entry position and an uppermost protrusion position of the preform in the stroke image;
A second step of forming a reference image by matching and rearranging the photographed image in a circular cue shape;
And a third step of automatically adjusting an area to be inspected for a gap between screws broken in a vertical direction in the reference image.
Preform inspection method.
17. The method of claim 16,
After the inspection region setting step,
Computer,
Recognizing between the first jaw and the second jaw, which is a mold characteristic in the reference image, as a character recognition target area, a plurality of inspection start points are set inside the character recognition target area, and a plurality of inspection ends outside the character recognition target area. Set a point, select the text object to be recognized through clustering within the area defined by the test width and the mold area width, including the test start point and the test end point, and classify the letters one by one by projection. Extracting the mold number and recognizing the extracted mold number as a cluster neural network classification unit of the computer to display on the operation panel of the preform inspection apparatus.
Preform inspection method.

Images