JPH1110752A - Method and apparatus for removing unnecessary rapping window from carton paper board web - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and apparatus capable of being operated smoothly and manufactured at low cost for removing an unnecessary rapping window from a continuously moving carton paper board web. SOLUTION: A juxtaposedly arranged parallel pair of cylinders 12, 16 having shafts disposed in the intersecting direction relative to the web moving direction operate to receive a moving web 24, and to fillip out rapped window parts by an expansion on one cylinder being meshed with an recess on the other cylinder. The expansion and recess are accorded with each other, and also accorded with rapped windows.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to a rotating mechanism used for removing unnecessary portions of a material to be die-cut placed on a web of continuously moving carton paperboard material.

[0002]

2. Description of the Related Art Rotating punching of a window is a widely used method for removing unnecessary portions from a carton paperboard web. In a conventional web-feeding carton press, the web is unreeled, fed through a row of printheads, die-cut, punched, separated,
And finally pile up. More specifically, the present invention relates to a punching operation in all steps of paper board processing.

[0003] The punching of the window portion of the die-cut sheet material is performed in order to remove unnecessary die holes from the web. The unwanted window piece is held on the die-cut web by "notches" which hold the window piece to the adjacent web. Each notch is like a fine bridge of material connecting the window piece and the web and is formed by small cuts at the cutting edge of the die rule. Each window can have several notches. "Window" punches are mainly used as hanging holes or viewing windows in carton boxes. When actually used as a window, the punched hole is usually covered later by a transparent plastic plate with an adhesive.

There are two main methods for punching windows.
That is, a flat type and a rotary type. The planar method consists of a reciprocating platen that has a properly positioned punching tool and moves perpendicular to the direction of web travel.
This type of stripper requires a brief stoppage of the web so that the set of punches can penetrate without breaking the web. On the other hand, rotary punching tools are used for continuously moving webs,
This allows operation at higher line speeds than flat punching tools. Conventional rotary punching tools are often referred to as "rotary pin strippers" because they are designed to pierce a window piece with a unique pin formed as a tool.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an apparatus which is less expensive than the above-mentioned conventional method for removing unnecessary die-cutting windows from a carton paperboard web, and which uses such equipment. To provide a removal method that enables more rapid operation and a device for performing the method.

[0006]

SUMMARY OF THE INVENTION A novel feature of the present invention is that, instead of using pins, an intermeshed convex image plate, one of which is male and the other is female, is generally, but not necessarily, a flexible photosensitive element. (Made of conductive resin) are rotatably engaged so that unnecessary members can be flipped out. Each convex image plate is mounted on a separate cylinder surface such that the perimeter of the composite obtained in this way coincides with the perimeter of the printed copy of the part to be stamped. These two cylinders are located in relation to each other and are also mutually separated by a punching mechanism and the web so that a synchronized registration of the window and the convex image to be removed from the die-cutting web takes place. It is located at a position related to.

In a first embodiment of the system, a continuous die-cut web having a plurality of indented unwanted portions (windows) is provided with a mating convex image mounted on two cylinders. Through a set of plates having Unnecessary parts stamped out of the carton, except that the images on the plate with the male and female images are slightly different to allow for misalignment, play, and draft at the shoulders of the images of the mating plate It is adapted to the shape. Generally, the male convex image plate is mounted on a cylinder on the upper side of the web and the female plate is mounted on a cylinder on the lower side of the web, where it is possible to apply pressure during the punching process. The vacuum support device is connected to the female plate. The notch that tethers the windowless part to the other part needs to be cut off, and the mating action of the mating image plate provides the positional movement to make this cut off. By this step, the unnecessary portion is pushed out of the moving web, and the unnecessary portion is removed until the cylinder on which the female plate is attached is rotated to a position where the unnecessary portion falls from the cavity of the female plate. Or be repelled from the cavity of the female plate. The garbage thus deposited can be collected and removed from the punching mechanism by any suitable means, such as, for example, a conveyor, airflow, or vacuum device.

[0008] In a second embodiment of the system, the male plate remains intact, but the female plate is not provided with a predetermined opening in register with the protrusion of the male plate. A substantially uniform thickness outer layer of an elastomeric polymer material is provided. The outer layer made of the elastic polymer material is sufficiently elastically deformed so that when the protruding male portion pushes the unnecessary window portion, at least a part of the protruding portion of the male plate is received together with the unnecessary window portion. To fit.

The advantages of the present system over the conventional method are as follows. The equipment required for the system (drums, plates, etc.) is less expensive than either conventional flat or rotary punching equipment.・ Higher-speed operation is possible than a flat-type punching device.・ There is less switching time between tasks. -Less occupied space than conventional equipment.・ The time required for tool production is short. Therefore, the leading time can be reduced. Similarly, tool changes / repairs can be made faster and at a lower cost. Equipped with punching means more effective than pins (windows are completely removed compared to piercing types). • On-the-fly tool-to-tool registration in both the lateral and longitudinal directions. With the arrangement of the present invention, it is possible to power the rotary punching unit and to register with the main press by means of various mechanical / electrical / servo mechanisms.

More specifically, the present invention provides a method of removing unwanted die-cut windows from a continuously moving carton paperboard web, comprising the following steps. That is, a step of preparing a pair of parallel cylinders arranged in parallel with an axis arranged in a direction transverse to the web moving direction; a step of passing the web between these cylinders; Pressing the unnecessary windows in the direction toward the other cylinder by means of radially outwardly projecting and removing the unnecessary windows, and receiving the unnecessary windows in the outer layer of the other cylinder. It comprises.

Further, the present invention provides an apparatus for removing unnecessary cutting windows from a continuously moving carton paperboard web, the apparatus being arranged in a direction transverse to the web moving direction. A pair of parallel cylinders arranged side by side with a set axis and guide means for the web to pass between these cylinders.

In one of the cylinders having means protruding radially outward to press and remove the unnecessary window portion in a direction toward the other cylinder, and in the outer layer of the other cylinder, Means adapted to receive the unnecessary window.

[0013]

Embodiments of the present invention will be described with reference to the accompanying drawings. Throughout the drawings, the same numbers indicate the same members.

[0014] As pointed out above, the purpose of the apparatus disclosed herein is to remove unwanted window areas from the die cutting web.

FIG. 1 shows a typical die-cut carton 2 held on a web 4 serving as a substrate. The window 6 is shown still held on the web 4. The member 8 is an unnecessary window after being removed from the web 4. The portion of the waste web 10 that is continuous in the longitudinal direction and short in the lateral direction is called a matrix, and is mainly removed from each carton at a position subsequent to the rotary punching machine. The overall shape of the matrix is generally ladder-shaped.

FIG. 2 shows a first embodiment of the present invention, in which an upper cylinder 12 having a plate (male) 14 having a convex image attached thereto is replaced with a plate (female) 18 having a convex image.
Is engaged with the lower cylinder 16. These two plates 14 and 18 are formed such that the convex image surface and the concave portion are complementary. This allows these two surfaces to mesh without interference. If a photosensitive resin plate is used for this part, the attachment of the plates 14 and 18 to each cylinder is performed by a double-sided tape (called "sticky back" in the printing industry). The convex image 20 on the upper cylinder 12 is
It is formed in accordance with the unnecessary window area so that the unnecessary window can be removed from the carton. Similarly, the concave portion 22 on the lower plate 18 is also formed in accordance with the unnecessary window portion. These recesses 22 are generally sized so that there is a slight edge gap between the mating male convex images. At the start of the operation, the upper cylinder 12 and the lower cylinder 16 are separated from each other so that the web 24 to be die-cut can pass freely. When these two upper cylinders 12 and lower cylinders 16 are synchronized with each other and registered as a pair with the stamped form on the web 24, a convex (male) image 20 disposed on the upper cylinder 12 becomes a web line. The upper cylinder 12 and the lower cylinder 16 are engaged with each other so that the unnecessary window portion 26 is pushed into the counterpart concave portion 22 disposed on the lower plate 18 through the lower window 18. Each perforated (removed) window 26 is recessed in the lower plate 18 until the position of the recess 22 on the lower cylinder 16 is approximately a half turn.
Held within 22. And at this position, the unnecessary window 26
Removed from the recess 22 by gravity and / or air jet flow. By using the rotary type in this way, this step of successively removing the unnecessary windows 26 is continuously performed without interruption. After being removed from these recesses 22, the respective unnecessary windows 26 can be sucked by a vacuum device or dropped into a container or a conveyor.

The plate 14 for punching out the unnecessary window 26,
18 can be formed of any suitable material, such as, for example, iron, aluminum, plastic, and the like. In particular, using a photosensitive resin plate exposed to ultraviolet light has an excellent advantage because the exposure technique and the image forming technique are common to the printing field. In fact, a similar material used for printing plates may be used for punching unnecessary windows.

After the window is punched out, the matrix 32 holding the carton travels along a linear path to a pair of driven nip rollers, an upper nip roller 28 and a lower nip roller 30, and at this position. As a result, the matrix 32 is pulled downward beyond the lower nip roller 30, and is drawn into the cutting device. At the same time, the individual cartons 34 are pulled forward by a transport mechanism (not shown) having the following functions. That is, the functions of the transport mechanism are as follows.

A) applying tension to the carton 34 to break the notches holding the carton 34 in the matrix 32;

B) separating the separated carton 34 into the following processing steps:
That is, sending to the transport / stretching / stacking stage.

After punching, the upper nip roller 28 and the lower nip roller 30 are preferably driven and the surface between the longitudinal axes of these nip rollers 28, 30 is carton
34 can be turned forward / reverse while bending in an arc to facilitate punching. The "pushing out" action provided by these paired nip rollers 28, 30 assists in punching. Upper and lower cylinders 12, 16 for punching windows
It is preferable that the speed of the pair of nip rollers 28 and 30 for performing the punching can be changed with respect to the speed of.

As another configuration, as shown by a dashed line 36 (FIG. 2B), the matrix 32 may be punched out as soon as it comes out of the lower cylinder 16.

FIG. 3 shows another configuration, in which the lower female plate 18 is not only adapted to receive a stamped window, but
It also "flicks up" the carton 34 while the matrix 32 is punched out of the lower cylinder 16. Thereby, two operations are simultaneously obtained from the punching operation of these plates 14 and 18. A) removing the unnecessary windows 26 from the carton 34;

B) punching out the carton 34 from the matrix 32;

As a result, there is no need to set an auxiliary nip roller for punching the matrix 32. In practice, the lower plate 18 will be both male and female depending on the nature of the web in a particular area (ie, window / carton / matrix). In this configuration, the matrix 32 exits the female lower cylinder 16 and is stamped to the same radial depth as the bottom of the recess. On the other hand, in the structure shown in FIG. 2, when punched from the lower cylinder 16, the matrix 32 is removed from the outer diameter of the lower plate 18, that is, from the region where the recess is not formed. The processing of the unnecessary window 26 is the same as the configuration shown in FIG.

FIG. 4 shows a second embodiment of the present invention, in which the upper cylinder 12 with the male plate attached thereto has a continuous flexible polymeric material 38 attached to the female plate. Instead of the lower cylinder 16. In this case, the convex image 20 portion on the upper plate 14 acts to push the window portion down into the flexible resin surface of the lower cylinder 16. The portion of the web 24 without a window is supported by the resin surface of the lower cylinder 16 without the plate 14 acting. As a result, the notch of the window portion is cut off, and an extruding behavior occurs in which the unnecessary window portion 26 is separated from the carton paperboard as the base material. Unnecessary window 26 has two upper and lower cylinders
When it comes out of the punching line between 12 and 16, it tends to stick to the resin surface of the lower cylinder 16 due to electrostatic attraction. Such a window unnecessary portion 26 may be formed by using, for example, an antistatic rod or an air jet,
An annular groove is formed on the surface, and the teeth of the comb member cooperating with the surface follow the annular groove (without contacting the annular groove) so that the unnecessary window 26 is dropped. For example, it is possible to remove from the surface of the lower cylinder 16 by many means.

In this embodiment, the matrix 32 is located at the position of the nip roller for separation as described above.
Alternatively, immediately after exiting from the lower cylinder 16, it is punched from the carton.

This embodiment has several advantages over the configuration described above. That is: a) Cost fluctuations in the lower (female) plate can be avoided. In addition, the lower cylinder provided with the resin sheathing material can be used for any printing repetition, unlike a structure using a plate material that requires a cylinder of a different diameter every time printing is repeated. The cost for equipment preparation can be greatly reduced.

B) Since the lower cylinder has a smooth surface, there is no need to lower the lower cylinder to release engagement with the male upper cylinder. This greatly simplifies the device for positioning the lower cylinder and reduces costs.

C) Due to the behavior of the male convex image on the resin surface of the lower cylinder, there is no need to drive the lower cylinder in synchronization with the upper cylinder. In fact, the lower cylinder may be an idler. If necessary, this idler can also be driven. In this case, the cost can be further reduced.

D) Unwanted windows are more easily removed from the smooth cylinder surface than if they were removed from recesses in the lower female plate as used in the configuration shown in FIGS. .

The above-mentioned disclosure shows a configuration for punching out a window in which an unnecessary window is punched out for a lower cylinder attached below the web. However, punching is also performed for the upper cylinder. Is desirable. However, such a configuration cannot expect a great advantage because the unnecessary window portion is located at a position against gravity.

Even though the use of a polymeric material such as polyurethane is expected to provide some wear resistance, one possible material for the outer layer used on the lower cylinder is nitrile. It is. The nitrile used has an A-type Shore hardness of 35.

In developing the present invention, test plates of various durometers and of various thicknesses were used for the upper cylinder. That is, a test was performed using a plate having a thickness of 0.067 inch to 0.125 inch, and good results were obtained. However, it is envisaged that the thickness of the plate may be outside this range. In conducting this experiment, an A + type plate durometer having a Shore hardness of 45 to 90 was used.

In order to achieve optimum performance, it is preferred that the depth of engagement between the two plates for window punching can be varied during operation. For example, over-engagement (i.e., interference) will stop the flow of the entire web between the two upper and lower cylinders, and this cylinder action for window punching will bite. This causes a displacement and web breakage. All that is required is that the male convex image "project" through the window from the web.

Although some of the embodiments of the present invention have been described with reference to the accompanying drawings, various modifications and changes can be made without departing from the spirit of the present invention, as shown in the appended claims. Some will be apparent to those skilled in the art.

[Brief description of the drawings]

FIG. 1 illustrates the components of a typical die-cut carton paperboard web.

FIG. 2 shows a first embodiment of the invention consisting of an upper cylinder plate with a convex image area coinciding with the window / unwanted area of the carton. The lower cylinder has a female plate with a recess that meshes with the male plate of the upper cylinder. (A) is a perspective view, (b) is a side sectional view.

FIG. 3 shows a modification of the first embodiment of the present invention comprising a carton and an upper cylinder plate with a convex image area coinciding with the window / unwanted area of the unneeded matrix. The lower cylinder has a plate with a convex image area that matches the carton shape. The recesses (or washed-down lows) in each plate are adapted to mesh with the male areas in the other mating plate. (A) is a perspective view, (b) is a side sectional view.

FIG. 4 shows a second embodiment of the invention consisting of an upper cylinder plate with a convex image area coinciding with the window / unwanted area of the carton. The lower cylinder has a flexible continuous polymeric shell. (A) is a perspective view, (b) is a side sectional view.

[Explanation of symbols]

 2 Carton 4 Web 6 Window 8 Unnecessary window 10 Unnecessary web 12 Upper cylinder 14 Plate 16 Lower cylinder 18 Plate 20 Convex image 22 Recess 24 Web 26 Unnecessary window 28 Upper nip roller 30 Lower nip roller 32 Matrix 34 Carton 36 One point Chain line 38 High polymer material sheath material

Claims (12)

[Claims] A step of preparing a pair of parallel cylinders having axes arranged in a direction transverse to a web moving direction; and a step of passing the web between the cylinders. Pressing the unnecessary window portion in the direction toward the other cylinder by using a means protruding radially outward on the cylinder, and receiving the unnecessary window portion in the outer layer of the other cylinder. And removing the unmoulded window from the continuously moving carton paperboard web. 2. The method of claim 2, wherein receiving said unwanted window is a recessed means disposed in said outer layer and opening outwardly, said sizing being configured to at least partially receive said outwardly projecting means with said unwanted window. 2. The method according to claim 1, wherein said means is adapted to be adapted and adapted.
The method of removing unnecessary cutting windows from a continuously moving carton paperboard web as described. 3. The method of claim 1, wherein the receiving of the unnecessary window is performed by deformation of the outer layer, the outer layer being made of an elastic material. How to remove the window. 4. A pair of parallel cylinders arranged side by side having axes arranged transversely to the direction of web movement, guide means for passing the web between the cylinders, and the other cylinder. One of the cylinders having means protruding outward in the radial direction to press and remove the unnecessary window in the direction toward, and receiving the unnecessary window in the outer layer of the other cylinder. Means adapted to remove unwanted stamping windows from a continuously moving carton paperboard web. 5. The method according to claim 5, wherein the means for receiving the unnecessary window is a recessed means disposed in the outer layer and open outwardly, and at least partially receiving the outwardly projecting means together with the unnecessary window. 5. Apparatus for removing unmoulded window sections from a continuously moving carton paperboard web as defined in claim 4, wherein the apparatus comprises sized and adapted recess means. 6. The method according to claim 6, wherein the outer layer of the other cylinder has a substantially uniform thickness, and also comprises a resilient material, wherein the outwardly projecting means pushes out the unwanted window. 5. A continuously moving carton paperboard as claimed in claim 4, comprising a resilient material adapted to elastically deform sufficiently to at least partially receive said outwardly projecting means with said unwanted window. A device for removing unnecessary mold removal windows from webs. 7. Apparatus according to claim 6, wherein said elastic material is a polymeric material having an A-type Shore hardness of 35. 8. The method of claim 7, wherein the polymeric material is selected from the group consisting of nitriles and polyurethanes. Equipment. 9. An outer cylindrical plate is attached to one of said cylinders, and said outwardly projecting means comprises:
5. Apparatus for removing unmoulded windows from a continuously moving carton paperboard web as defined in claim 4, including at least one radially outwardly projecting portion secured to said cylindrical plate. 10. The means for receiving the unnecessary window is a recessed means disposed in the outer layer and opening outward, wherein the means for projecting outwardly is at least partially received with the unnecessary window. 10. Apparatus for removing unmoulded window sections from continuously moving carton paperboard webs as defined in claim 9, wherein the apparatus comprises sized and adapted recess means. 11. The outer layer of the other cylinder has a substantially uniform width and is also a resilient polymeric material and the outwardly projecting means extrudes unwanted windows. An elastic polymer material adapted to elastically deform sufficiently to at least partially receive the outwardly projecting means together with the unwanted window portion, wherein the polymer material has an A-type Shore hardness of about 10. The method of claim 9, wherein said polymeric material is selected from the group consisting of nitriles and polyurethanes to remove unwanted mold windows from continuously moving carton paperboard webs. apparatus. 12. Apparatus according to claim 4, including adjusting means for changing the distance between said axes of said two cylinders, for removing unnecessary cutting windows from a continuously moving carton paperboard web. .