JPH07923Y2 - Inflation film inspection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an inflation film inspection apparatus for inspecting the presence or absence of fish eyes of an inflation film, such as transparency and thickness.

[Conventional technology]

Conventionally, in the film manufacturing process, in order to control the quality of the blown film, the presence or absence of fish eyes or foreign matter in the film, the transparency, and the like are inspected. In the inspection of this film, labor saving and reduction of time have been promoted in recent years.

By the way, in the inspection of the properties of this blown film, conventionally, the film taken at the film manufacturing site as a sample is brought to the inspection place, and the presence or absence of fish eyes etc. is checked there using a commercially available appearance inspection device. Is going. However, in this case, it takes time from when the sample is taken until the film inspection result by the sample is obtained, and when a defective product is found by the inspection, there is a disadvantage that the defective product is mass-produced.
Therefore, in order to shorten the inspection time and obtain the inspection result in real time, it is conceivable to develop an inspection device for inspecting the film during the operation of the blown film production line, that is, online.

[Problems to be solved by the invention]

In this case, since the film to be inspected in the production line has a flat tube shape, so to speak, two films are inspected at the same time. However, in some cases, such as when the transparency of the film is poor or when the defect signal is weak, the inspection itself cannot be performed, so it is impossible to inspect the properties of the tubular film as it is in the production line.

It is an object of the present invention to provide an inflation film inspection apparatus capable of accurately inspecting the properties of an inflation film in a production line.

[Means for solving problems]

The present invention is an inspection device for inspecting an inflation film which is operating in a line in a film production line from an inflation molding machine to a film winding operation, and a flat tubular inflation film sent from the inflation molding machine is a sheet. Cutting means for cutting into a sheet shape, a separating means for separating the superposed portions of the inflation film cut into a sheet by the cutting means in a direction away from each other, and an insertion member for inserting the separating means into the superposed portion of the inflation film. And a film inspection means for inspecting the properties of the inflation film cut into a seed shape by the cutting means, wherein the separating means, the insertion member and the film inspection means are provided in the apparatus body having casters. And

[Action]

In a state in which the film production line is operating, the flat tube-shaped inflation film being transported in the production line is cut into a sheet by a cutting means. Then, the blown film is made into two polymerized sheet-shaped films or one folded sheet-shaped film.

Then, the separating means, the insertion member and the film inspection means are introduced into the film production line together with the apparatus main body.
Therefore, first, the insertion member is inserted into the gap of the overlapping portion of the inflation film as a guide, and then the separating means is inserted. By this separating means, the superposed portions of the blown film are separated from each other.

The property of the blown film cut in this state is inspected by a film inspection means.

When the inspection is completed, the separating means, the insertion member, and the film inspection means are retracted together with the apparatus main body from the film production line, and then the cutting operation of the flat tubular inflation film in the cutting means is completed.

The properties of the blown film as referred to in the present invention include transparency, presence or absence of fish eyes and foreign matter, film thickness, and the like.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

FIG. 1 shows a schematic configuration in which the present embodiment is arranged on a production line between an inflation molding machine and a winding machine.

In FIG. 1, an inflation molding machine 10 is equipped with an extruder 3 into which a raw material resin is fed from a hopper 2, from which a molten resin is supplied to a die 4 and the inflation film 1 is moved upward from the da 4 After being blown into a tube shape toward the flat plate, the plate is flattened by the stabilizer plate 5, and the flat plate-shaped film 1 is formed from the stabilizer plate 5 by a pair of pinch rolls 6.
Is being pulled. A film winding machine 20 having a winding roll 21 for winding the flat tube-shaped inflation film 1 fed from the pinch roll 6 is disposed beside the inflation molding machine 10. Film winding from these inflation molding machines 10
A film production line is formed between 20 and a film inspection device 25 according to the present embodiment is provided in this line. In addition, reference numerals 7A, 7B, 7C and 7D in FIG. 1 are guide rolls for guiding the inflation film 1 from the inflation molding machine 10 to the film winding machine 20.

The film inspection device 25 is a cutter that constitutes cutting means.
26 and a film inspection device 30.

The cutters 26 are attached to a pair of frames (not shown) provided in the inflation molding machine 10 or standing upright in the vicinity of the molding machine 10, and can be moved back and forth with respect to the flat tubular film 1. It is said that. When the cutter 26 is advanced toward the film 1, the cutter 26 pierces the film 1 and cuts off both ends of the film 1 so that the film 1 is in the form of two continuous sheets.

The film inspection device 30 is shown enlarged in FIGS. (The left and right sides of the film inspection device 30 in FIGS. 1 and 2 are shown in reverse.) In these drawings, the film inspection device 30 is a caster.
31 and a base 32 having a stopper 50
A gate-shaped frame 33 is erected on one side of 32. A mounting plate 34 is attached to the frame 33. here,
The apparatus body is composed of the base 32, the frame 33, and the mounting plate 34. On the upper side of the mounting plate 34, four cantilever rolls 40 are provided horizontally, two in each of the upper and lower sides, which are parallel to each other. These cantilever rolls 40 function as a separating means, and are configured to separate the film 1 cut into two by the cutter 26 into two vertical directions. Between the cantilever rolls 40, a projector 42 made up of a high-frequency fluorescent lamp is provided via a supporting member 41 attached to a mounting plate 34, and is mounted on the mounting plate 34 at a relative position below the projector 42. A CCD camera 44 is provided via a bracket 43, and a monitor 45 is electrically connected to the CCD camera 44. Here, the projector 42, the CCD camera 44, and the monitor 45 constitute a film inspection means 46, and the film inspection means 46 irradiates the lower film 1 of the two vertically separated films 1 with light. Then CCD camera 4
It is possible to inspect the presence or absence of fish eyes and foreign matter in the film 1 and the transparency by capturing the image on the monitor 45 by capturing the image on the monitor 45.

A pyramidal insertion member 49 is attached to the attachment plate 34 via two attachment rods 48. The insertion member 49 is located on the tip side of the cantilever roll 40 and is 4 mm from the outer edge of the bottom surface portion. The cantilever roll 40 of the book is designed so as not to protrude from the front. As a result, the insertion member 49 functions as an insertion member for smoothly inserting the cantilever roll 40 between the two films 1 cut as the inspection device 30 enters the manufacturing line. To do.

On the film introduction side of the mounting plate 34 (right side in FIG. 2),
A pair of auxiliary cutters 36 are provided via a supporting plate 35 protruding from the mounting plate 34. As shown in FIG. 3, these auxiliary cutters 36 are formed in a substantially L-shape with their tips facing the inflation molding machine side, and their cutting blades.
36A is attached to both raised end portions 35A of the support plate 35 with springs 37 with 36A facing outward, and the cutting edge 36A
Thus, the both ends of the film 1 which has been cut by the cutter 26 are completely cut into two sheets.

The arrow P in FIGS. 1 to 3 indicates the transport direction of the film 1.

The property of the blown film 1 is inspected by the film inspecting device 25 having such a structure as follows.

First, in a state in which the inflation film 1 is being formed by the inflation molding machine 10 and being wound by the film winder 20, that is, in a state in which the production line is operating, the film 1 transferred through the production line by the cutter 26. Cut both ends of. Then, film 1
It is made into a sheet shape that is superposed on two sheets.

After that, inflation molding machine 10 and film winding machine 20
The film inspection device 30 is introduced into the film production line between Therefore, after a worker manually separates the films 1 superposed on two sheets in the line, a gap is formed between the films 1 by an appropriate means such as interposing a rod (not shown), and the film inspection is performed from this gap. The device 30 is inserted from the tip of the insertion member 49. At this time, the insertion member 49 is
It plays the role of a guide, so to speak, film 4 smoothly
The film 1 sent to the cantilever roll 40 of the book is sent to the winder side in a state of being separated into upper and lower two, and at the same time, the film 1 is polymerized by the guide roll 7D and wound up. Take up by 20.

The lower film 1 of the films 1 separated in the upper and lower directions by the cantilever roll 40 is inspected by the film inspection means 46 for the presence of fish eyes and foreign matter, and the transparency. That is, when light is emitted from the light projector 42 toward the film 1 being transferred, the film 1 is illuminated and a clear image is formed.
The image is taken by the CCD camera 44 and is projected on the monitor 45. The inspector looks at the image that is successively changed and is displayed on the monitor 45 as the film 1 is transferred, and measures the number of defects such as fish eyes per unit area or unit time by an automatic measuring device or visually. As a result, the quality control department can obtain the quality information of the film 1, and the production department can stop the operation of the inflation molding machine 10 and take measures so as not to mold the defective inflation film 1. it can.

On the other hand, when the inspection is finished, the inspection device 30 is retracted from the manufacturing line while the both ends of the flat tubular film 1 are cut by the cutter 26. At this time, the auxiliary cutter 36
Since there is no contact with the film 1, the film 1 can be smoothly removed from the cantilever roll 40 via the insertion plate 49 even when the inspection device 30 is retracted. After retracting the inspection device 30, the cutting of the film 1 by the cutter 26 is stopped.
Then, the film 1 is sent to the winder 20 side in a flat tube shape. After that, the portion used for the inspection of the film 1, that is, the portion cut into two pieces is cut off, and the winding machine 20
The take-up roll 21 is replaced and the flat tubular film 1 not used for the inspection is taken up on a new take-up roll 21.

According to this embodiment, the flat tube-shaped film 1 is cut into two pieces by the cutter 26, and then the film 1 is inspected by the film inspecting device 30 as one sheet, and the property is inspected. Can be done accurately in the production line. Further, according to the present embodiment, since the cutting means is the cutter 26, the structure of the film inspection device 25 can be simplified. Furthermore, in addition to the cutter, the auxiliary cutter 36 is provided, so that the film 1 can be completely cut,
During the inspection, there will be no trouble such as obstruction of the transfer of the film 1. Further, since the insertion member 49 is provided, the film inspection device 30 can be smoothly inserted into the manufacturing line.

In the above embodiment, the cutting means is the cutter 26,
In addition to the above, the cutting means of the present invention may be one that cuts the film 1 by using a laser beam, a heating wire, or the like. In short, if the film 1 can be sent to the film inspection device 30 in a state of being cut into two pieces, The means does not matter. In addition, the position of the film is also checked from the inflation molding machine 10 to the film inspection device.
It can be anywhere in the 20 film production lines. Further, the film 1 is cut into two pieces by the cutter 26, but if the film 1 is cut into one sheet shape, one end of the flat tube shape may be cut into a single open shape. However, the structure of the film inspecting apparatus is simplified if the above-mentioned embodiment is adopted. Even if the film 1 is cut into two pieces as in the above embodiment, both the film 1 and the upper part may be inspected.
Furthermore, the properties of the film 1 that can be inspected in the present invention include the transparency, the presence or absence of a fish eye and a foreign substance as in the above embodiment, and the thickness of the film 1 and the like. In this case, the film inspecting means for measuring the thickness of the film includes an irradiation means for irradiating the film 1 with infrared rays and a measuring means for measuring the thickness of the film 1 from the change in the amount of light transmitted through the film 1. Alternatively, there is one that measures the thickness of the film 1 from the amount of displacement of the spindle that is brought into contact with the film 1. Even in the case of inspecting the presence / absence of a fish eye and foreign matter, transparency, etc., it is not necessarily limited to the configuration of the above embodiment. For example, as a device for inspecting the presence or absence of fish eyes, etc., it is equipped with a scanner that irradiates a film with a laser beam and a light receiver, and when the laser beam is irradiated and scattered on the fish eyes in the film, the light receiver detects this. As a method for inspecting the transparency of a film, there is a method that includes a light irradiator and a light receiver and detects the transparency on the basis of the diffusion rate of the light with which the film is irradiated. Further, in the present invention, the auxiliary cutter 36 does not necessarily have to be provided. However, if this is provided, the effect as described above is obtained.

[Effect of device]

According to the present invention as described above, it is possible to accurately inspect the property of the blown film in the production line.

[Brief description of drawings]

FIG. 1 is a schematic configuration view showing a state in which an embodiment according to the present invention is arranged between an inflation molding machine and a film winding machine, and FIG. 2 is a front view showing a main part of the embodiment, Three
The drawing is a plan view thereof, and FIG. 4 is a right side view thereof. 1 ... Inflation film, 10 ... Inflation molding machine, 20 ... Film winder, 25 ... Film inspection device, 26 ... Cutter as cutting means, 30 ... Film inspection device, 32, 33, 34 ... ... the base that makes up the device body,
Frame and mounting plate, 40 ... cantilever roll as separation means, 46 ... film inspection means, 49 ... insertion member.

Claims (1)

[Scope of utility model registration request] 1. An inspection device for inspecting an inflation film which is operating in a line in a film production line from an inflation molding machine to a film winding machine,
Cutting means for cutting the flat tubular inflation film sent from the inflation molding machine into a sheet shape, and a separating means for separating the polymerized portions of the inflation film cut into a sheet shape by this cutting means in a direction away from each other. An inserting member for inserting the separating means into a superposed portion of an inflation film, and a film inspecting means for inspecting a property of the inflation film cut into a sheet by the cutting means, the separating means, the inserting member, and An inflation film inspection device, wherein the film inspection means is provided in the device body having casters.