KR860001982B1 - Bonding method of film piece - Google Patents

Abstract

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Description

Bonding method of film piece

1 is a partial cutaway front view of an example of a metal tube with a tube formed by the method of the present invention.

2 is a longitudinal sectional view showing an example of an apparatus for practicing the method of the present invention.

FIG. 3 is a cross sectional view taken along the line III-III of FIG. 2;

The present invention relates to a method for adhering a film piece, and more particularly, to a method for cutting a film piece of a predetermined length from a long wound web and attaching the film piece to a cylindrical outer peripheral surface such as a tubular body. It is about.

The seamless upper tube 2, as shown in FIG. 1, and the respective open ends 2a and 3a of the seamless lower tube 3 are also fitted through the adhesive layer 4 and bonded together. It has been proposed that the metal plate 1 having the circumferential surface joining portion 5 is suitable for a pressure-resistant container which accommodates carbonated drinks, beer, and the like in particular.

In this case, as a method of forming the adhesive layer 4, application of a liquid adhesive such as a thermosetting adhesive or a slurry adhesive or electrostatic application of a powdery adhesive to the opening end before fitting can also be considered. However, the method of applying and heating a tape-like film piece made of a heat-adhesive plastic to the opening end portion 3a to be made inward is preferable because an adhesive layer without defects such as pores of uniform thickness is stably obtained. Do.

The inventor of the present invention previously proposed in Japanese Patent Application Laid-Open No. 58-152082, a device for automatically thermally bonding a tape piece made of such a heat-adhesive plastic film to the outer circumferential surface of an open end of a hollow cylinder such as a tubular body. did.

In the embodiment of the apparatus, in a tape piece supplying roll that rotates intermittently, the web is cut into a film piece of a predetermined length, and then the film piece is sent out at a predetermined interval from the supply roll to the thermal bonding roll. Although the rotation of the supply roller is an intermittent movement, there is a limit to the delivery speed, which is not suitable for high speed production.

On the other hand, a method of continuously rotating the supply roll, sending the vacuum-adsorbed web on the supply roll circumferential surface by the predetermined interval, cutting the web on the circumferential surface to form a film piece of the predetermined length, and sending the film piece also Although proposed at the same time, when the width of the web is narrow (for example, 4-10 mm) and thin (for example, 30-150 μm), it is made of a thermoplastic plastic film, the web is stretched at the time of feeding, and the length precision of the film piece after cutting is increased. The problem of falling easily arises.

Moreover, the thermal bonding of the tape piece by this apparatus is performed in the state which hold | maintained the hollow cylinder which intermittently revolves in the fixed position in a thermal bonding station. Therefore, there is a limit to the production speed, there was a problem that is unsuitable for high speed production.

An object of the present invention is to send a long wound web continuously, cut into film pieces, and send the film pieces to adhesive rolls such as thermal adhesive rolls at predetermined intervals, and send the film pieces on the adhesive rolls of the cylindrical body. It is to provide a method for bonding to the outer peripheral surface.

Another object of the present invention is to provide the above method, wherein the web is narrow in width and thin in thickness, but the film piece can be cut to a predetermined length with high dimensional accuracy while continuously sending the web.

It is still another object of the present invention to cut a film piece of a predetermined length with a high dimensional accuracy from a long wound web, and to heat bond the film piece continuously at a predetermined interval without causing problems such as breaking or deformation of the film piece. It is providing a method of sending out to an adhesive roll, such as a roll, and adhering to the outer circumferential surface of the cylindrical body which continuously rotates the film piece on the adhesive roller while continuing to revolve.

According to the present invention, it is provided with at least three segments which are spaced apart from each other while being on a common imaginary circumferential surface in an expanded state, and having at least three segments having an arcuate circumferential surface adjacent to each other in a contracted state, and continuously rotating The web of the film is supplied to the circumferential surface of this segment in the contracted state of the film piece feeding device at the web feeding station, and the web is cut between these adjacent segments at the web cutting station to form a film piece. Then, the segment is placed in an expanded state, and at the film piece feeding station, the film piece is sent out on an adhesive roll, and a method of bonding the film piece on the adhesive roll to the outer peripheral surface of the cylindrical body is provided.

In addition, according to the present invention, the adhesion rotates simultaneously while continuously rotating the cylindrical body in the direction opposite to the rotational direction of the adhesive roll, and when the cylindrical body comes to a position substantially opposite to the adhesive roller, the cylindrical body Is moved in the substantially radial direction of this revolution, and the outer peripheral surface of this cylindrical body is contacted with this film piece on this adhesion roller under pressure, and the method of sticking this film piece to this outer peripheral surface is provided.

FIG. 2 shows an apparatus 6 for thermally bonding a tape-like film piece to the opening end 3a of the lower tube 3 of the type shown in FIG. 1 to which the method of the present invention is applied. The heat bonding apparatus 6 is provided with the web supply apparatus 7, the film piece supply apparatus 8, the heat adhesion roll apparatus 9, and the tubular conveyance apparatus 10. As shown in FIG.

The web supply apparatus 7 includes a delivery rail 12 and a looper 13 for the web 11. As in the case where the film piece 11a cut | disconnected in the web 11 forms the adhesive bond layer 4 of FIG. 1, it is narrow (for example, 4-10 mm) and thin (for example, 30-150 micrometers). In the case of a thermoplastic film, when the web 11 is wound on the segment 14 of the film piece feeder 8 while being tensioned, the film surface 11a is elastically shrunk after cutting to be described later. There is a fear that the film piece 11a will not be obtained. The looper 13 has a particularly large tension applied to the web 11 between the delivery rail 12 and the pinch roll 15 provided in the film piece feeding device 8, which adversely affects the web 11. It is installed to prevent.

13a ₁ , 13a ₂ , and 13a ₃ are in-position guide rolls. 13b ₁ and 13b ₂ are vertically movable guide rolls, and are rotatably attached to the movable support 13c which can slide up and down along the fixed vertical axis 13d. When a large tension is applied to the web 11 due to a time delay of the control mechanism at the start or stop of the discharging rail 12, the guide rollers 13b ₁ and 13b ₂ are raised to relax the tension. have.

And, 16 is a proximity switch which emits a signal for stopping the rotation of the delivery rail 12 when the movable support body 13c reaches the position (lower limit position) which opposes.

As shown in FIG. 3, the film piece feeding device 8 is provided with a rotating plate 20 and a vacuum switching roll 21 axially supported by the housing plate 17 and the fixed cam plate 18 through the horizontal shaft 19. As shown in FIG. ) And a vacuum switching valve 22 fixed to the housing plate 17. The horizontal axis 19 is continuously rotated at constant speed by the motor which is not visible through the gear 23, and thus the turntable 20 is also rotated at constant speed in the direction of arrow X, that is, clockwise (FIG. 2).

Four sets of guide rails 24 are provided in the turntable 20 at intervals of 90 degrees, and four segments 14a, 14b, 14c, and 14d are horizontal axes along the guide rails 24, respectively. (19) It is installed so that it slides radially while revolving around it. This sliding movement is performed through the cam roller 25 and the cam shaft 26 in accordance with the timing determined by the profile 27 of the cam groove 18a provided in the cam plate 18.

In the outer peripheral surface 28 of each segment 14, the recessed groove 28a in which the web 11 and the film piece 11a are fitted is formed. And the segment 14 is located in the outermost part of the radial direction, ie, the state of the segment 14c located in the film piece delivery station C (henceforth a delivery station) of FIG. 2 (it is an expanded state in this specification). When each segment 14 is located at the same time, the circular arc bottom face of the concave groove 28a, ie, the circumferential surface 29 (in this specification, the portion of the outer peripheral surface 28 in contact with the web 11 and the film piece 11a) Circumferential surface) is formed on the common virtual circumferential surface 30 with a predetermined circumferential direction distance l. In addition, the circumferential length of the circumferential surface 29 is determined substantially equal to the outer circumferential length of the opening end portion 3a of the tubular body 3.

In the state where the segment 14 is located at the innermost side in the radial direction (referred to as a contraction state in the present specification), the circumferential surfaces 29 of adjacent segments 14 are adjacent to each other (in this specification) The segment 14 is formed so as to be adjacent, including the case where the gap 29b of about 5 mm or less is formed and approaching as shown in FIG.

And the cam profile 27 is the segment 14a in web supply station A (henceforth supply station), and the segment 14b in valve cutting stay line B (henceforth cutting station) located downstream. And the segment 14d located upstream of the supply station A is in the contracted state, and the segment 14c in the delivery station C is in the expanded state.

In the peripheral surface 29 of the segment 14, the vacuum hole 31 for vacuum-suctioning the web 11 and the film piece 11a, and holding it in the recessed groove 28a is opened. The vacuum hole 31 is connected to a vacuum apparatus (not shown) through the flexible pipe 32, the vacuum switching roll 21, the vacuum switching valve 22, and the conduit 33.

In the vacuum switching valve 22, a vacuum circumferential groove 22a connected to the conduit 33 is provided in the path from the supply station A to the delivery station C in the direction of the arrow, The path from immediately afterward to the direction immediately before the supply station A in the arrow X direction is formed so as to be connected to the coating 21a of the vacuum switching roll 21 in an unillustrated atmospheric circumferential groove open to the atmosphere.

The pinch roll 15 provided in the supply station A is a segment 14a for the web 11 supplied to the film piece supply apparatus 8 by the air cylinder 34 (it may be another protozoic press mechanism, such as a spring mechanism). On the circumferential surface (29).

In addition, the rotating plate 20 has a circumferential surface 29 of each segment 14 in which the web cutting device 35 is contracted with the segment 14 and the same number (four segments 14a, 14b, 14c, 14d in FIG. 2). It is fixed at a position corresponding to the front end 29a of the. The web cutting device 35 includes a rotary solenoid 37, a rotor 37a of the solenoid 37, and a blade 36 fixed to the tip thereof, and has a gap 29b of the circumferential surface 29. ) Reaches the cutting station B, the rotor 37a rotates in response to a signal of a proximity switch (not shown), and the blade 36 cuts the portion of the web 11 on the gap 29b in the width direction thereof. It is comprised so that the film piece 11a of predetermined length (substantially equal to the length of the circumferential surface 29) may be formed on the segment 14b. At this time, the web is held on the circumferential surfaces of both segments 14a and 14b by vacuum adsorption, so there is no fear of slipping during cutting. The blade 36 may be operated by a mechanical mechanism such as a cam mechanism.

The segment 14b arrives at the sending station C by idling but is in an extended state until then. In the expanded state, the circumferential spacing between the film piece 11a on the preceding segment 14b and the film piece 11a on the subsequent segment 14a is equal to the circumference length l.

The thermal bonding roll apparatus 9 is provided with the fixed shaft 48 and the adhesive roller 39 which rotates continuously in the direction of an arrow Y. The adhesive roll 39 has an outer cylinder 41 made of a metal inner cylinder 40 and a heat resistant elastic rubber (for example, silicone rubber), and the outer cylinder 14 includes a segment 41a. ) And the same number (the same number in the figure, but may not necessarily be the same number), and the small diameter portion 41a located between the adjacent heat bonding portions 41b. . The circumferential length between each thermal bonding part 41a and the adjacent thermal bonding part 11a is substantially equal to the length of the film piece, and the circumferential length l, respectively. The diameter of the small diameter part 41b is smaller than the diameter of the thermal bonding part 41a.

Moreover, the adhesive roll 39 is arrange | positioned on the outer peripheral surface of the thermal bonding part 41a so that a delivery station C may pass. The latter is such that the circumferential velocity of the outer circumferential surface of the thermal bonding portion 41a is equal to the circumferential velocity of the circumferential surface 29 of the segment 14c in the expanded state or the former is in a range in which permanent elongation does not occur in the film piece 11a. The adhesive roll 39 is rotated by a drive mechanism not shown so as to be slightly faster.

The portion corresponding to the path from the dispensing station C between the adhesive roll 39 and the fixed shaft 38 to the thermal bonding station D at a position substantially opposite to the dispensing station C along the arrow Y direction or counterclockwise direction is provided. The vacuum chamber 42 is formed, and the vacuum chamber 42 is connected to the vacuum apparatus which is not shown through the fixed shaft 38 coating 43 and the center hole 44. As shown in FIG.

In the heat bonding portion 41a, a plurality of vacuum holes 45 extending radially to the vacuum chamber 42 are formed, so that the film piece 11a sent to the adhesive roll 39 in the feeding station C is the heat bonding portion 41a. Is vacuum-adsorbed on the outer circumferential surface of the C) and held until the heat adhesion is completed.

And the film piece supply apparatus 8 is equipped with the space | interval adjustment mechanism (not shown) of each segment 14 and the adhesive roll 39 for smoothly sending out the film piece 11a to the adhesive roll 39, and have.

The tubular conveying apparatus 10 continuously rotates in the same flow direction as the adhesive roll 39 in the tubular feeder turret 46 which rotates continuously in the direction of arrow Z, and in the direction W of the arrow (clockwise). Tube transfer battery 47 for resonating (3) Combined tube feeder that rotates continuously in the synapse V direction, and the (lower) tube 3 which is circulated continuously in the direction of the combining table U, and contacts Infinite to rotate continuously in the R direction (clockwise), that is, in the same flow direction as the revolving direction of the tubular body 3, such that the circumferential velocity of the opening end portion 3a is approximately equal to the circumferential velocity of the outer circumferential surface of the thermal bonding portion 41a. The circulation valve 49 is provided.

In the tubular transfer battery 47, a plurality of tubular holders 50 are arranged at equal intervals along the circumferential direction. The tubular holder 50 is fixed to the core rod 51 which holds the tubular body 3 so that the axis can be rotated, the support body 52 of the core rod 51, the base of the support body 52, and the bearing 56 And a cam roller 54 provided at the lower end of the slide shaft 53. The cam roller 54 is engaged with the cam groove (not shown) which has the cam curve 55 formed in the cam plate which is not shown in figure.

Most of the cam curve 55 has a circumference centered around the center of the central axis 47a of the tubular transfer battery 47, but the thermal bonding station D (the thermal bonding start point D ₁ and the end point D ₂ , At the position opposite to the point D ₁ to D ₂ ), as illustrated, the trajectory 60 of the shaft center 3b of the tubular body 3 is coaxial with the adhesive roll 39, the radius of which is The later stage of the thermal bonding portion 41a which is slightly smaller than the radius of the outer circumferential surface of the thermal bonding portion 41a of the adhesive roll 39, the thickness of the film piece 11a, and the radius of the outer circumferential surface of the opening end portion 3a of the tubular body. As small as the value corresponding to the compression value due to the pressure of; the tube body 3 is moved in the approximately radial direction of revolution so as to be a part of the virtual cylindrical surface, which is usually about 0.055-1.00 mm. It is formed so that a constant pressure is applied along the 3a) and the heat-adhesive part 41a outer peripheral surface.

The value of the circumferential length l is determined so that the front end of the film piece 11a on the thermal bonding portion 41a and the opening end 3a simultaneously reach the starting point D ₁ of the thermal bonding station D. Therefore, l is represented by a predetermined value satisfying V ₁ p ≒ V ₂ (l + l _F ). Where V ₁ is the circumferential velocity of the thermal bonding portion 41a, V ₂ is the circumferential velocity of the tube shaft 3b just before the starting point D ₁ , l _F is the length of the film piece 11a, and p is the starting point D _1. The distance between the circumferential axis | shafts between the tube body and subsequent adjacent tube body in is shown.

Accordingly, in accordance with the continuous rotation of the tubular transfer battery 47, the rotor 3 revolves in the direction of the arrow W, and the tubular body 3 in which the opening end portion 3a is heated by the thermal coil 57 to be described later is a thermal bonding station D. When the thermal bonding start point D ₁ is reached, it shifts slightly in the radially inward direction of the revolution, and in the thermal bonding station D, the film surface 11a on the thermal bonding portion 41a contacts with the opening end part under predetermined pressure while rotating. The film piece 11a is heat-sealed to 3a).

Each support 52 is provided with an arc-shaped high frequency induction heating coil 57 facing the opening / end 3a of the tubular body 3 from the front, and the heating coil 57 is a tubular body 3 with a belt ( At the same time as starting rotation (rotation) in contact with 49), it is energized through a rotation transformer or the like not shown, and the opening end portion 3a is heated almost uniformly to a heat-adhesive temperature until reaching the thermal bonding station D. And off at the same time as the end of thermal bonding.

In the above-mentioned thermal bonding apparatus 6, the thermal bonding of the film piece 11a to the opening edge part 3a of the tubular body including delivery of the film piece 11a is performed as follows.

Heat-adhesive plastics such as modified linear polyester, nylon 11 or 12, carboxylic acid-modified polyolefin, etc., have a relatively low melting point, and have a predetermined width composed of a plastic having a polar group. The web 11 of thickness starts from the delivery rail 12, passes through the looper 13, contacts the pinch roll 15, and does not generate wrinkles or the like by the action of the pinch roll 15, In the web supply station A, it smoothly enters the recessed groove 28a of the segment 14a and is vacuum-sucked.

When the segment 14a continuously revolves and the front end 29a of the circumferential surface 29 reaches the cutting station B as shown in FIG. 2, the web cutting device 35 operates, and the web 11 It is cut at the front end 29a.

Further, when the segment 14a revolves and the rear end of the circumferential surface 29 reaches the cutting station B, that is, when the segment 14a reaches the position of the segment 14b in FIG. 2, the web cutting device 35 again returns. In operation, the web 11 is cut at this trailing end.

Since no tension is applied to the web 11 at the time of cutting, it is substantially the same as the length of the circumferential surface 29, and therefore is substantially the same as the outer peripheral length of the opening end 3a of the tubular body 3 (preferably About 1-5 mm longer than this outer periphery length In this case, the film piece 11a of predetermined length is formed with high numerical precision, also in this specification.

The segment 14a continues to be idle, and is expanded by the operation of the cam roller 25 (state of segment 14c in FIG. 2) until the front end 29a of the circumferential surface 29 reaches the delivery station C. To reach And the vacuum of the vacuum hole 31 opened in the circumferential surface 29 part which passed through the sending station C is canceled | released, and the film piece 11a on this peripheral surface part is the heat bonding part of the adhesive roll 39 in the sending station C. It moves onto 41a and is held by vacuum suction on its outer peripheral surface. The front end 29a of the circumferential surface 29 of the segment 14 and the front end of the outer circumferential surface of the thermal bonding portion 41a simultaneously move on the thermal bonding portion 41a of the adhesive roll 39 in the feeding station C. It is held by vacuum adsorption on its outer peripheral surface. And the initial position adjustment of the adhesive roller 939 is performed so that the front end 29a of the circumferential surface 29 of the segment 14 and the front end of the outer peripheral surface of the heat attachment part 41a may reach | attain the feeding station C simultaneously. In this way, the film piece 11a of predetermined length is sent out from the film piece supply apparatus 8 to the thermal bonding roll apparatus 9 by the predetermined space l.

On the other hand, the tubular body 3 is fed from the tubular feeder 46 to the core rod 51 of the tubular conveying battery 47, and at the same time as the revolution in the arrow W direction, the belt 49 directs the arrow R direction. While the opening end portion 3a is inductively heated to a heat bondable temperature by the heating coil 57 while reaching the heat bonding station D. The tubular body 3 continues to rotate, and the film piece 11a on the thermal bonding part 41a is heat-sealed under predetermined pressure to the opening edge part 3a to which the primer (not shown) was previously apply | coated.

The heating coil 57 is turned off at almost the same time as the end of the thermal bonding, and the tube body 3 in which the film piece 11a is thermally bonded to the opening end portion 3a continues to revolve in the arrow W direction, while the tube feeder 48 ) Is sent to the next step.

This invention is not restrict | limited by the above example, For example, the method of this invention can be applied also in order to adhere | attach (including adhesiveness, glue paste, etc.) of film pieces, such as a seal tape, to the outer peripheral surface of cylindrical bodies other than a tubular body. will be. Therefore, paper, metal foil, a woven fabric, or a laminated body thereof is selected according to the purpose of the web.

In addition, the number of segments 14 should just be provided one minimum and three totals corresponding to both cutting stations, and a sending station. The larger the number of segments, the closer the outer circumferential surface is to the circular shape in the contracted state, so the pinch roll is less jumping and advantageous to high speed revolution of the segment. However, if the number of segments is too large, the device becomes excessive, so the appropriate number is appropriate. It is preferable to select.

Further, depending on the application, the length of the circumferential surface and the interval between the adjacent segments may not be uniform. In addition, as a web cutting device, an appropriate type of laser may be used depending on the application such as a laser (when the circumferential surface of adjacent segments is in contact with) or a heating wire. In addition, the web may be held on the segment circumferential surface by light adhesion, electrostatic adsorption, or the like.

Moreover, you may adhere | attach the film piece sent to the adhesive roll by the cutting | disconnection and delivery method of this invention to the outer peripheral surface of cylindrical bodies, such as a tubular body which intermittently revolves, as described in Unexamined-Japanese-Patent No. 58-15082.

Claims (10)

At least three segments spaced apart from each other on a common imaginary circumferential surface in the expanded state, and having an arcuate circumferential surface adjacent to each other in the contracted state; On the circumferential surface of this segment, a web of film is supplied at the web supply station, and the web is cut between these adjacent segments at the web cutting station to form a film piece, and then the segment is extended. And sending the film piece onto the adhesive roll at the film piece feeding station, and bonding the film piece on the adhesive roll to the outer circumferential surface of the cylindrical body. At least three segments spaced apart from one another on a common circumferential surface in the extended state and spaced apart from each other in a constricted state, the segment being in the contracted state of the continuously rotating film piece feeder. In the web supply station, a web of film is supplied at a web supply station, and the web is cut between these adjacent segments at a web cutting station to form a film piece, and then the segment is placed in an expanded state. In the feeding station, the film piece is sent out on the adhesive roll, while the cylindrical body is rotated at the same time while continuously rotating in the opposite direction to the rotation direction of the adhesive roll, so that the cylindrical body is at a position substantially opposite to the adhesive roll. At this time, this cylindrical body is moved in the substantially radial direction of this revolution, and the outer peripheral surface of this cylindrical body is easily bonded A film piece bonding method, wherein the film piece is brought into contact with the wool film under pressure, and the film piece is bonded to the outer peripheral surface thereof. The method for adhering a film piece according to claim 1, wherein the cylindrical body is a metal tube. The method for adhering a film piece according to claim 1, wherein the outer circumferential surface is an outer circumferential surface of the opening end of the metal tube. The method of claim 1, wherein the web is made of a thermoplastic plastic tape. The method for adhering a film piece according to claim 4, wherein the web is made of a thermoplastic tape having a narrow width and a thin thickness. The method of adhering a film piece according to claim 2, wherein the cylindrical body is a metal tube. The method for adhering a film piece according to claim 2, wherein the outer circumferential surface is an outer circumferential surface of the opening end of the metal tube. The method for adhering a film piece according to claim 2, wherein the web is made of a thermoplastic plastic tape. 9. A method of adhering a film piece according to claim 8, wherein the web is made of a thermoplastic tape having a narrow width and a thin thickness.

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