JP2010159073A - Container sealing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To form a sturdy sealed part even at a filling port of a container consisting of a single material efficiently in a short time. <P>SOLUTION: In a sealing method for a container 10 in which a filling port 32 is held by a pinch bar 83 to be flattened in a plate to keep the flattened filling port 32 sealed, the fore end of the filling port 32 held by the pinch bar 83 is exposed, and the exposed fore end of the filling port 32 is heated and sealed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a container sealing method.

  As containers filled with contents such as detergent, a pouch formed by bonding synthetic resin sheets (Patent Document 1), or a container in which a synthetic resin container body is molded by a mold (Patent Documents 2 and 3) ) Has been proposed. In these containers, after filling the contents from the filling port portion of the container, the filling port portion is heat-sealed and sealed.

JP2001-213448 JP2002-193232 JP-A-11-130112

  Conventionally, heat sealing (bar seal, band seal or radiant heat seal) that is an external heating method, impulse seal or hot air seal, and ultrasonic sealing that is an internal heating method are used as methods for heat-sealing the filling port of the container. It is possible to do.

  The bar seal or band seal sandwiches the filling port part with a heated bar or band. When the filling port part is made of a single material such as HDPE (high density polyethylene), the inner resin is completely dissolved. Since the outer resin is completely dissolved first to be in a blown state, sealing cannot be realized.

  Impulse seals can be sealed without fusing by sandwiching the filling port with a seal type, instantaneously heating and cooling, and cooling as it is, but heating and cooling require a long time in the same process, and productivity is high. bad. In addition, since the sealed seal mold is kept being pressure-bonded, the thickness of the sealing seal portion is reduced, and pinholes are easily generated.

  Like the impulse seal, the hot air seal requires a large heating time and has poor productivity.

  In the ultrasonic seal, when the uneven thickness (for example, 400 ± 200 μm) of the filling port is large, the ultrasonic vibration is not propagated uniformly and cannot be sealed.

  Radiant heat seal using Nichrome heater (far infrared) heats the clamped filling port in a non-contact manner over time and cools the melted part by pressure bonding. This requires sharp edges at both ends of the sealing part.

  An object of the present invention is to form a strong and sealed seal portion efficiently in a short time even in a filling port portion of a container made of a single material.

  The invention of claim 1 is a container sealing method in which the filling port portion is flattened by pinching with a pinch bar, and the filling port portion sealed in this flat plate shape is sealed, and the tip of the filling port portion sandwiched between pinch bars The exposed tip of the filling port is heated and sealed.

1A and 1B show a container according to an embodiment of the present invention, in which FIG. 1A is a front view, FIG. 1B is a side view, and FIG. 1C is a perspective view showing a sealing seal portion provided in a filling port portion. FIG. 2 shows a container, (A) is a front view showing a state where the filling port part is dropped inside the container body, (B) is a partial front view showing a state before dropping the filling port part, and (C) is It is a fragmentary sectional view showing a state after dropping a filling mouth part. FIG. 3 shows a container manufacturing process, (A) is a front view showing the container supply process, (B) is a front view showing the filling port cutting process, (C) is a front view showing the contents filling process, (D ) Is a front view showing the filling port sealing step, and (E) is a front view showing the filling port reversing step. 4A and 4B show a cutting process of the filling port part, where FIG. 4A is a perspective view showing the filling port forming part sealed before cutting, and FIG. 4B shows the filling port forming part not sealed before cutting. The perspective view which shows, (C) is a perspective view which shows the cut filling port part. FIG. 5 shows a cutting state by an ultrasonic cutter, (A) is a plan view showing an ultrasonic cutter and a container, and (B) is a cross-sectional view showing the ultrasonic cutter and a filling port portion. FIG. 6 is a side view showing the ultrasonic cutter and the container. 7A and 7B show the sealing process of the filling port, where FIG. 7A is a perspective view showing the filling port before sealing, and FIG. 7B is a perspective view showing the sealed filling port. FIG. 8 shows a sealing process using a near-infrared heater, (A) is a front view showing the heater and the container, and (B) is a schematic diagram showing the heater. 9A and 9B show a sealing process using a near-infrared heater, where FIG. 9A is a side view showing a charged state of the container, and FIG. 9B is a side view showing a pressed state of the container by a clamp. 10A and 10B show a sealing process using a near-infrared heater, where FIG. 10A is a side view showing a pinch state of the filling port portion, and FIG. 10B is a side view showing a heating state of the filling port portion. 11A and 11B show a sealing process using a near-infrared heater, where FIG. 11A is a side view showing a pressure-bonded state of a filling port portion, and FIG. FIG. 12 is a side view showing a heating structure using a near infrared heater. FIGS. 13A and 13B show the filling port dropping process, wherein FIG. 13A is a perspective view showing the filling opening before dropping, and FIG. 13B is a perspective view showing the filling opening after dropping. 14A and 14B show a dropping process by the driving head, where FIG. 14A is a side view showing a charged state of the container, and FIG. 14B is a side view showing a holding state of the container by the driving guide. 15A and 15B show a dropping process by the driving head, FIG. 15A is a side view showing a pressing state of the container by the container clamp, and FIG. 15B is a side view showing a pressing state by the driving head. 16A and 16B show a dropping process by the driving head. FIG. 16A is a side view showing a state in which the container is pressed by the container clamp, and FIG. 16B is a side view showing a state in which the container is released by the driving guide. FIG. 17 is a side view showing a state where the filling port portion has been dropped. FIG. 18 is a schematic cross-sectional view showing a driving jig and a container. FIG. 19 is a perspective view showing the driving head. FIG. 20 shows a state in which a dent is formed in the reversing part of the container, (A) is a perspective view showing a pressing state by the dent forming tool, and (B) is a perspective view showing a reversing part of the container in which the dent is formed. .

  As an embodiment of the container of the present invention, the synthetic resin bag container 10 shown in FIG. 1 is formed into a hollow three-dimensional shape by blow molding such as direct blow molding or injection blow molding as molding by a mold. It is a thing. The bag container 10 is used as a container for enclosing a liquid agent, in particular, a hair cleaning agent, a whole body cleaning agent, a liquid detergent, a cleaning agent, or the like as the contents, and the bag container 10 is filled with the liquid agent and used, for example, Sometimes opened as a self-supporting bag for refilling to refill the contents in another container (Figure 2).

  The bag container 10 includes a spout forming portion 14 that protrudes from the shoulder portion 13 of the trunk portion 12 of the container body 11 and a filling port forming portion 16 that protrudes from the bottom portion 15 of the trunk portion 12.

  In addition, as a synthetic resin material for forming the bag container 10, polyolefin such as HDPE (high density polyethylene), LDPE (low density polyethylene), L-LDPE (linear low density polyethylene), OPP (oriented polypropylene), etc. A soft synthetic resin material such as a resin or a polyester resin such as PET (polyethylene terephthalate) can be used as a single layer. A laminated resin of these synthetic resins and other synthetic resins can also be employed. For example, a laminated resin in which LDPE or L-LDPE is used as the inner layer and the outer layer is HDPE (high density polyethylene) can be used. Also, EVOH resin (ethylene vinyl alcohol copolymer resin), EVA resin (ethylene vinyl acetate copolymer resin), resin laminated with nylon resin, etc., and resin such as EVA, EVOH, nylon, etc. with resin such as PE (polyethylene) A blended resin can also be employed.

  By blow molding using the above-mentioned synthetic resin material, the barrel portion 12 of the container body 11 has a cross-section crossing the barrel portion 12 and the side edge and the rear portion of the front portion 12A via the parting line 23 of the mold. By being continuous with the side edge of 12B, it has a rectangular hollow cross-sectional shape with an ellipse or a rounded corner, and is formed into a flat shape with a wide front view and a narrow back view.

  The bag container 10 has a bottom portion 15 formed integrally with the body portion 12 and the boundary portion 17 as a truncated cone-shaped reversing portion 30, and the filling port forming portion 16 protrudes from a pedestal portion 31 at the tip of the reversing portion 30. The filling port forming part 16 is cut to form a filling port part 32 that opens in a circular shape, and after the contents are filled and accommodated from the filling port part 32, the sealing base part 33 of the filling port part 32 is used. It is a bag-like container that is folded so as to crush the region on the front end side, forms a sealing seal portion 34 in which the filling port portion 32 is fusion-sealed and encloses the contents, and the filling port portion 32 is sealed. The sealing base portion 33 which is the boundary portion of the sealing portion 34 has a polygonal cross-sectional shape with an even number of angles in plan view, preferably a quadrangle, and more preferably a square cross-sectional shape. On the tip side (upper end side in FIG. 1), a cylindrical portion 5 the distal end side sectional changing portion 36 that changes its cross-sectional shape so as to be connected are provided with. Further, on the side of the pedestal portion 31 with respect to the sealing base portion 33, an isosceles triangular shape in which each side of the square cross-sectional shape is a base 37A, and both ridge lines 37B with both ends of the base 37A as base points is a hypotenuse. A plurality of (four in this embodiment) flat triangular panel portions 37 are provided continuously in the circumferential direction of the filling port portion 32, and when the filling port portion 32 is fusion sealed, a sealing base portion is provided. A pair of opposite corners of the square cross-sectional shape of the sealing base portion 33 before the fusion seal is formed at both ends of the sealing seal portion 34 after the fusion sealing by folding the region 33 on the tip side from the side. The part 33A is arranged (FIG. 1C).

  That is, the filling port portion 32 before the fusion seal includes a sealing base portion 33 having an even-numbered polygonal cross-sectional shape (square cross-sectional shape) and a cylindrical portion 35 provided on the front end side of the sealing base portion 33. A tip-side cross-section changing portion 36 that changes the cross-sectional shape so as to be connected to the sealing base 33 and the cylindrical portion 35 is provided between the sealing base 33 and the cylindrical portion 35. Between the sealing base portion 33 and the pedestal portion 31, each side of the polygonal cross-sectional shape with an even number of angles is a base 37A, and two ridge lines 37B with both ends of the base 37A as base points are two hypotenuses. A plurality of equilateral triangular flat triangular panel portions 37 are provided continuously in the circumferential direction of the filling port portion 32.

  In addition, the sealing base part 33 refers to the boundary part of the sealing seal part 34 to which the fusion sealing in the filling port part 32 is performed as described above. The sealing seal includes the sealing base portion 33, and is applied by a cylindrical portion 35 between the neck groove 38 or the neck ring 39 on the distal end side from the sealing base portion 33. This is because, when the fusion seal is applied, the filling port portion 32 is easily crushed so as to be folded flat, and the fusion seal can be applied with high accuracy in a stable state.

  Further, the portion of the filling port portion 32 closer to the container main body 11 than the sealing base portion 33 has a square cross-sectional shape portion (even-angle polygonal cross-sectional shape portion) 37C connecting the apexes of the four triangular panel portions 37. To the above-described pedestal portion 31 provided on the bottom portion 15 of the container body 11.

  As described above, the bag container 10 includes the reversing portion 30 that gradually decreases the cross-sectional area from the boundary step portion 17 to the body portion 12 toward the front end side, and the front end of the reversing portion 30. It has the base part 31 of the flat substantially elliptical plane shape which covers a part. The bottom portion 15 is filled with the contents in the container body 11 and forms a sealing seal portion 34 in which the filling port portion 32 is fused and sealed, and then reverses the reversing portion 30 as shown in FIG. By pressing the inside of the body part 12 to form a recess in the bottom part 15, a mounting part by the boundary step part 17 with the body part 12 is formed. As shown in FIG. 2, the bag container 10 enclosing the contents can be placed in a stable self-standing state (upright state) on the placement surface by being bottomed through the placement portion. It becomes possible. At this time, the body portion 12 and the bottom portion 15 of the container body 11 made of synthetic resin have a thickness of 100 μm or more so as to ensure stable independence when the contents are filled and accommodated and commercialized as a self-supporting bag. It is preferable to be molded. In addition, it has moderate flexibility, can be crushed, folded or bent, and can be generally flat, for example, a thickness of 700 μm or less, more preferably a thickness of 500 μm or less. It is preferable to be formed into a thin wall.

  The bag container 10 is connected to the spout forming portion 14 protruding from the central portion of the shoulder portion 13 of the trunk portion 12, and is connected to the base portion 20 and the distal end portion of the base portion 20 via the easily breakable portion 21, and the upper end of the base portion 20. It has the excision scheduled part 22 which obstruct | occludes opening (spout). The base 20 has a hollow, generally truncated cone shape that gradually tapers toward the tip.

  For example, the spout forming part 14 includes a base part 20 below and a part to be excised above the base part 20 by an easily breakable part 21 having a narrow groove-like concave part formed so as to surround the outer circumferential surface of the spout part 14. 22. After the bag container 10 is commercialized as a free-standing bag, the free-standing bag is released from the sealed state by forming the spout by separating the planned cutting portion 22 at the distal end region from the base 20 rather than the easily breakable portion 21. .

  The planned cutting portion 22 connected to the upper end portion of the base portion 20 via the easily breakable portion 21 has a disk shape, and is arranged so as to cover the upper end opening (spout port) of the base portion 20. The spout is closed by being integrally formed with the easily breakable portion 21. The easily breakable portion 21 has an opening knob piece extending in the diameter direction (side edge direction of the front surface portion 12A or the back surface portion 12B) along the parting line 23 by the molding die and having a locking hole 24. 25 is provided integrally on the upper surface of the disc-shaped excision scheduled portion 22. Here, the surface along the parting line 23 is a virtual surface including the parting line 23.

  Further, a presser knob piece 26 protrudes from the shoulder portion 13 in a state of being separated from the spout forming portion 14 on the shoulder portion 13 of the body portion 12 adjacent to the spout forming portion 14 on the side where the opening knob piece 25 projects. Provided.

  Hereinafter, regarding the manufacturing process of the bag container 10 after molding, (A) container supply step, (B) filling port cutting step, (C) content filling step, (D) filling port sealing step, (E) filling It demonstrates in order of a mouth inversion process.

(A) Container supply process (Fig. 3 (A))
The container body 11 of the molded bag container 10 is inserted and held from the shoulder portion 13 of the trunk portion 12 into the container carrier (袴) 1. The container carrier 1 stores the spout forming part 14 of the bag container 10 in the small-diameter bottom hole 1A, and loads the lower half of the trunk 12 of the bag container 10 into the large-diameter holding hole 1B. It is carried into a transfer conveyor at a container supply station of a container production line by a feeder. As a result, the bag container 10 is supplied to the container production line, and is sequentially positioned at the filling port cutting station, the content filling station, the filling port sealing station, and the filling port reversing station along the conveyor.

  The bag container 10 handled in this embodiment has a product size of about 85 mm on the surface of the container body 11, about 30 to 45 mm on the side surface, about 190 mm in height, and 360 ml of liquid (about 450 ml full capacity before sealing, bottom inversion) Later capacity is about 400ml), container weight is about 15g, wall thickness is about 400 ± 200μm, the material is pearl-like HDPE outer layer / white HDPE inner layer, and the decoration is thin in-mold label (front and back of bag container 10) (Thickness 50-80 μm).

  Note that the bag container 10 inserted and held in the container transporter 1 and supplied to the container production line seals the tip opening of the cylindrical portion 35 of the filling port forming unit 16 to prevent foreign matter from being mixed in the transport stage. It can also stop and can be set as the sealing part 35A (FIG. 4B).

(B) Filling port cutting process (Fig. 3 (B))
When the bag container 10 inserted and held in the container transporter 1 is positioned at the filling port cutting station of the container production line, the cutter 50 provided in the unillustrated cutting machine is shown in FIG. The cylindrical portion 35 of the filling port portion 32 in the filling port forming portion 16 shown in FIG. 4) is cleanly cut, and a certain flat surface as shown in FIG. 4 (C) suitable for the subsequent filling and sealing operations of the contents. The end surface shape is imparted to the cut surface of the cylindrical portion 35.

  As shown in FIGS. 5 and 6, the cutter 50 includes a base portion of a triangular panel portion 37 that contacts the filling port portion 32 in the filling port forming portion 16 of the bag container 10 held by the container carrier 1, and a cylindrical portion 35. In the state where each of the neck rings 39 is gripped by the lower gripper 61 and the upper gripper 62 operated by the air cylinder, the blade 51 formed by the two surfaces 51A and 51B intersecting at an acute angle is formed into a cylindrical filling port. The filling port forming portion 16 is cut by moving the portion 16 (cylindrical portion 35) from the lateral direction to form a filling port portion 32 that opens in a circular shape. The blade 51 of the cutter 50 is not limited to the one that fixes the filling port forming portion 16 (cylindrical portion 35), as long as the blade 51 of the cutter 50 cuts by relatively moving the filling port forming portion 16 (cylindrical portion 35). 50 may be fixed, or both may be moved relative to each other at different speeds. In the subsequent process, after filling the bag container 10 with the contents from the filling port portion 32, the filling port portion 32 is sandwiched by pinch bars 83 to form a flat plate, and the flat filling port portion 32 is sealed. To form a sealing seal 34.

  The cutting position of the filling port forming portion 16 by the cutter 50 (P in FIGS. 4A and 4B) is cylindrical depending on the position of the sealing seal portion 34 and the seal length S (FIG. 7B). It is determined at an appropriate position in the axial direction of the portion 35. The neck groove 38 of the cylindrical portion 35 is mainly a manually cut portion because the cut surface by the cutter 50 becomes thick and the aesthetic appearance is impaired.

  As shown in FIG. 5, the cutter 50 has a blade 51 screwed to the tip of a horn 53 provided on the vibrator 52, and the blade 51 is laterally moved to the filling port forming portion 16 (cylindrical portion 35) of the bag container 10. When the filling port forming portion 16 is cut by being pressed from the side, a minute vibration of, for example, 10 kHz or more is given to the blade 51. As a result, the frictional resistance of the blade 51 with respect to the filling forming portion 16 is reduced and the sharpness is sharpened. As a result, the cut surface of the filling port portion 32 is made smooth and the occurrence of burrs can be prevented. At this time, since the force applied to the filling port forming portion 16 can be minimized, there is no possibility of causing damage such as deformation and tearing.

(C) Contents filling process (Fig. 3 (C))
When the bag container 10 inserted and held in the container carrier 1 is positioned at the content filling station of the container production line, the filling nozzle 70 provided in the filling machine (not shown) is connected to the filling port portion 32 that has been cut in the previous step. Inserted into the opening and filled with a certain amount of contents.

(D) Filling port sealing process (Fig. 3 (D))
When the bag container 10 inserted and held in the container transporter 1 is positioned at the filling port sealing station of the container production line, the sealing machine 80 shows the filling port portion 32 filled with the contents in the previous process as shown in FIG. As shown, a sealing seal 34 is formed by sealing.

  As shown in FIGS. 8 to 11, the sealing machine 80 includes a heater 81, a container clamp 82, a pinch bar 83, and a crimping bar 84.

  As shown in FIG. 8, the sealing machine 80 forms a flat plate by sandwiching the filling port portion 32 with a pinch bar 83, and exposes the tip end portion of the flat filling port portion 32 to the outside of the pinch bar 83 to expose it. The front end portion of the filling port portion 32 is heated by the heater 81, and the front end portion of the heated filling port portion 32 is sandwiched between the crimping bars 84 to form a sealing seal portion 34.

  As shown in FIG. 8, the heater 81 is composed of a pair of left and right that heats the left and right flat surfaces of the flat end of the filling port portion 32 from the left and right. Each heater 81 is irradiated with a mirror 81A having a U-shaped reflective surface plated with gold, a heat source lamp 81B such as a halogen lamp disposed close to the top of the reflective surface of the mirror 81A, and a mirror irradiated with the heat source lamp 81B. And a transparent plate 81C that transmits the heat beam reflected by 81A. Each heater 81 condenses and heats the heat beam from the heat source lamp 81B in a linear shape (condensation line) at the flat end of the filling port portion 32 located at the apex of the mirror 81A.

  The heating method of the heater 81 uses infrared rays (including near infrared rays having a wavelength of 0.75 to 1000 μm, mid-infrared rays, and far infrared rays) emitted from the heat source lamp 81B, but preferably near infrared rays (wavelengths of 0.75 to 1.5 μm). Is used. Near-infrared rays are a kind of electromagnetic wave, and are not heat energy but light energy, and the light energy absorbed by the object to be heated is heated by heat generated by inducing molecular motion (vibration).

Hereinafter, the filling port sealing procedure by the sealing machine 80 will be described.
(1) The bag container 10 inserted and held in the container carrier 1 is introduced into the sealing machine 80 (FIG. 9A).

  (2) The upper half of the body 12 of the bag container 10 is pressed from the outside by a pair of left and right container clamps 82 to bleed the container body 11 (FIG. 9B).

  When the filling port portion 32 is dropped into the container body 11 by driving and reversing the reversing portion 30 in the subsequent step of the filling port sealing step, if the container body 11 contains a large amount of air, the reversing portion 30 is driven. It cannot be reversed. For this reason, a predetermined amount of air is vented from the container main body 11 before the sealing seal portion 34 is formed in the filling port sealing step. For example, the distance between the pair of left and right container clamps 82 is reduced from 46 mm to 20 to 28 mm, which is substantially the same as the side width of the container main body 11, that is, about 40 to 60% of the side width of the container main body 11. 30 is driven to enable reversal. Here, the appearance of the bag container 10 can be changed by adjusting the amount of air to be extracted. For example, if the amount of air to be extracted is considered to be large, the trunk portion 12 of the bag container 10 after the filling port portion 32 is dropped into the inside of the container body 11 by driving the reversing portion 30 and reversing is slightly present. It becomes a hollow shape, and can have an acute and slim appearance. Conversely, if the amount of air to be extracted is reduced, the bag container 10 after the filling port part 32 is dropped inside the container body 11 by driving the reversing part 30 and reversing the body part 12 slightly. It has a bulging shape, and can have a soft and rounded appearance.

  (3) The filling port portion 32 of the bag container 10 is sandwiched between a pair of left and right pinch bars 83 to form a flat plate shape, and the tip end portion of the flat filling port portion 32 is exposed to the outside of the pinch bar 83 (FIG. 10). (A)).

  The exposed length L (FIG. 12) of the front end portion of the filling port portion 32 is adjusted according to the seal length S (FIG. 7B) of the sealing seal portion 34, but is preferably 4 to 8 mm. Preferably it is 5-7 mm (FIG. 12).

  (4) The heater 81 is lowered from the standby position to the working position, the focus of the near-infrared heat beam of the heater 81 is aligned with the above-described plate-like tip of the filling port 32, and the tip of the filling port 32 is Heat (FIG. 10B).

  The focal points of the heat beams of the left and right heaters 81 are aligned with the surfaces of the left and right flat surfaces of the flat plate tip of the filling port portion 32, and the irradiation width x is 2 to 3 mm. The gap length y between the upper surface of the pinch bar 83 and the focal point of the heat beam is preferably 2 to 3 mm (FIG. 12). If the gap length y is not provided, the portion sandwiched between the pair of left and right pinch bars 83 may melt, and the filling port portion 32 may be deformed such as bending from the portion sandwiched by the pinch bars 83. Further, when the gap length y is larger than this range, the height of the filling port portion 32 as a whole increases, and even if the filling port portion 32 is pushed into the body portion 12, the filling port portion 32 protrudes from the bottom portion or the pinch bar 83 is sandwiched. May be weakened, and the sealing may be incomplete due to the focus of the heat beam deviating from the tip of the filling port portion 32 or the like.

  The heating time of the flat tip end portion of the filling port portion 32 by the left and right heaters 81 is preferably 1.0 to 3.5 seconds, and more preferably 2.0 to 3.0 seconds.

  (5) The heated tip of the filling port 32 is sandwiched between a pair of left and right crimping bars 84, and the tip of the filling port 32 is crimped and cooled to form a sealing seal 34 (FIG. 11A). )). The thickness z (FIG. 12) of the crimping bar 84 is preferably about 2.0 to 3.0 times the irradiation width x. If it is smaller than this range, the width of the sealing part 34 may be insufficient and sufficient sealing strength may not be obtained. On the contrary, the thickness z of the crimping bar 84 is too large and the tip part of the filling port part 32 If the exposed length L of the filler is exceeded, the most advanced end of the filling port portion 32 may be excessively dissolved, and the aesthetic appearance may be impaired. In the present embodiment, the thickness z of the crimping bar 84 is 5 mm with respect to the state where the irradiation width x is 2 to 3 mm and the exposed length L of the tip of the filling port portion 32 is about 6 mm. At this time, it was pressed by the container clamp 82 by releasing the pressing of the body portion 12 by the container clamp 82 immediately before, for example, 0.1 to 0.5 seconds before or at the same time as the front end of the filling port portion 32 is crimped by the crimping bar 84. The internal pressure of the body portion 12 is applied as an extra force to the seal seal portion 34, and the seal seal portion 34 is prevented from being damaged.

  The pressure applied to the crimping bar 84 is the clearance between the crimping bars 84 when the pair of left and right crimping bars 84 is closed without the bag container 10, the thickness z of the crimping bar 84, and the diameter of the filling port portion 32 before crimping. It is adjusted appropriately depending on the thickness and the like. As an example, when the pair of left and right crimping bars 84 is closed without the bag container 10, the clearance between the crimping bars 84 is 0.5 mm, the thickness z of the crimping bar 84 is 5 mm, and the diameter of the filling port portion 32 before crimping. When the thickness is about 25 mm and the thickness is about 400 μm, the pressure applied to the left and right sides of the crimping bar 84 is adjusted to about 90 to 150 N.

  The time for the crimping bar 84 to crimp and cool the tip of the filling port 32 is preferably 0.5 to 2.5 sec, more preferably 1.0 to 2.0 sec. For cooling, a room temperature of about 15 to 30 ° C. is sufficient, but if necessary, air at room temperature is blown to the sealing seal portion 34 or, for example, cold air of 0 to 10 ° C. is blown to the sealing seal portion 34. You may do it. Further, for example, a cooling bar adjusted to 5 to 25 ° C. may be brought into contact with the sealing seal portion 34. The clearance between the crimping bars 84 when the pair of left and right crimping bars 84 is closed without the bag container 10 is appropriately adjusted depending on the thickness of the bag container 10 and the pressure applied by the crimping bar, but preferably 0.3. ~ 1.0mm. If the clearance between the crimping bars 84 is smaller than this range, there is a risk that the sealing part 34 will be compressed and crushed. On the contrary, if it is larger than this range, there is a risk that sufficient sealing strength cannot be obtained at the sealing part 34.

  (6) The pinch bar 83 is clamped to the filling port portion 32, and the pressure bonding of the pressure bonding bar 84 is released, and the formation of the sealing seal portion 34 as shown in FIG. 7B is completed (FIG. 11B).

  The sealing machine 80 of this embodiment uses a high-infrared near infrared heater HYL20-6MR as the heater 81, voltage 100V, rated current 6A, rated power 600W, condensing line length 60mm, focal length a (FIG. 8B )) Was 20 mm. As the material of the pinch bar 83 and the pressure bonding bar 84, it is preferable to select a material that hardly absorbs near infrared rays. Here, aluminum is used to prevent the temperature rise.

According to the filling port sealing process of the present embodiment, the following operational effects can be obtained.
(a) The tip of the filling port 32 sandwiched between the pinch bars 83 is exposed, and the exposed tip of the filling port 32 is heated and sealed. Accordingly, the tip end portion exposed along the pinch bar 83 of the filling port portion 32 is a line-shaped flat end portion, and the line-shaped flat end portion is intensively heated. The tip end portion of the filling port portion 32 is efficiently heated in a short time to form a strong sealing seal portion 34.

  (b) By irradiating the tip of the filling port portion 32 with near infrared rays, light energy (not heat energy) is absorbed by the heated portion and induces molecular motion (vibration) to generate heat. The tip end portion of the filling port portion 32 is efficiently heated in a short time to form a strong sealing seal portion 34.

  (c) By providing a gap length between the upper surface of the pinch bar 83 and the focal point of the heat beam, the portion sandwiched by the pair of left and right pinch bars 83 is melted, and the filling port portion 32 is sandwiched by the pinch bar 83. It is possible to prevent deformation such as bending from a part.

  (d) Crimping is performed by sandwiching the tip of the heated filling port 32 with a crimping bar 84. Thereby, the front-end | tip part of the filling port part 32 is crimped | bonded reliably, and it is set as the stable strong seal part 34. FIG.

(E) Filling port reversal process (Fig. 3 (E))
When the bag container 10 inserted and held in the container transporter 1 is positioned at the filling port reversing station of the container production line, the reversing device 90 drives the reversing unit 30 and turns it over, and the filling port unit 32 is placed at the bottom of the container body 11 15 (FIG. 13). Thereby, the bag container 10 forms a recessed part in the bottom part 15 of the container main body 11, forms the mounting part by the boundary part 17 with the trunk | drum 12 in the bottom part 15, stackability of the container main body 11, and the packaging box Improves storage and aesthetic appearance.

  In the bag container 10, the container body 11 is filled with contents from the filling port portion 32 protruding from the container body 11 through the reversing unit 30 in the previous process until the filling port reversing step (content filling step). The portion 32 is sandwiched between pinch bars 83 to form a flat plate, and the filling port portion 32 formed into a flat plate is sealed to form a sealing seal portion 34 (filling port sealing step). In the filling port sealing step, as described above, after the container body 11 is pressed from the outside, the sealing seal portion 34 of the filling port portion 32 is formed, and the reversing portion 30 is driven and reversed in the filling port reversing step. We are trying to make sure.

  As shown in FIGS. 14 to 17, the reversing device 90 includes a container clamp 91, a driving guide 92, and a driving head 93.

Hereinafter, the filling port reversal procedure by the reversing device 90 will be described.
(1) The bag container 10 inserted and held in the container carrier 1 is introduced into the reversing device 90 (FIG. 14A).

  (2) The upper end of the body 12 of the container body 11 (on the side of the boundary 17 with the bottom 15) is sandwiched by a pair of left and right driving guides 92 to position the container body 11 (FIG. 14B).

  (3) A portion of the container body 11 away from the reversing part 30, in this embodiment, the upper half of the body 12 is appropriately pressed from the outside by a pair of left and right container clamps 91 to increase the internal pressure of the container body 11. (FIG. 15A). An appropriate internal pressure is applied to the container body 11 in advance so that the driving force applied by the driving head 93 does not buckle the container body 11.

  (4) While maintaining the pressing state of the container body 11 of (3) above by the container clamp 91, the pedestal portion 31 (the periphery of the filling port) formed between the reversing unit 30 and the filling port portion 32 by the driving head 93 Part) is pushed into the inside of the container main body 11, and the reversing part 30 is driven and reversed (FIG. 15B).

  In this embodiment, the peripheral portion of the filling port into which the driving head 93 pushes is the pedestal portion 31, but this peripheral portion of the filling port may be the head side portion in the truncated conical surface of the reversing portion 30. .

  As shown in FIGS. 18 and 19, the driving head 93 has a tapered tip end taper shape and pushes the pedestal portion 31. The driving head 93 is provided at the center of the push-in portion 93 </ b> A and protrudes to the center of the pedestal portion 31. A hole portion 93 </ b> B that receives the mouth portion 32 (including the sealing seal portion 34, the cylindrical portion 35, the distal end side cross-section changing portion 36, and the triangular panel portion 37) is provided. The length H (FIG. 18) of the driving portion 93 </ b> A of the driving head 93 is equal to the driving depth d (FIG. 18) of the reversing portion 30 (the height of the base portion 31 driven against the boundary portion 17 of the bottom portion 15). It is preferably 1.05 to 1.50 times, more preferably 1.15 to 1.40 times. By setting H to 1.05 times or more, the driving becomes sufficient, and it is possible to prevent the inversion portion 30 from returning outward and deforming to form a bulge after the driving is completed. By setting H to 1.50 times or less, more preferably 1.40 times or less, the container main body 11 can be securely held, and the container main body 11 falls off the container clamp 91 or the container main body 11 is rubbed against the container clamp 91. Can be prevented from being damaged or the sealing seal 34 can be broken. The vertical width w1 (FIG. 19) of the hole 93B of the driving head 93 is preferably 1.05 times or more, more preferably 1.2 times or more the length j (FIG. 13A) of the sealing seal portion 34. If w1 is 1.05 times or more, the sealing seal part 34 can be prevented from entering the hole 93B, the sealing seal part 34 can be bent or bent from the base, and the sealing seal part 34 and its surroundings can be damaged. It is possible to prevent such troubles. The lateral width w2 (FIG. 19) of the hole 93B of the driving head 93 is preferably 1.05 to 5.0 times, more preferably 1.5 to 3.0 times the thickness k (FIG. 13A) of the sealing seal 34. By making w2 smaller than 5.0 times, the area of the tip surface of the driving portion 93A is secured and driving is ensured, and by making w2 1.05 times or more, the sealing seal portion 34 surely enters the hole portion 93B. In addition, it is possible to prevent problems such as the sealing seal portion 34 being bent or bent from the base, and the sealing seal portion 34 and its surroundings being damaged.

  Before the driving head 93 pushes the pedestal portion 31 to drive the reversing portion 30 and reverses, the left and right truncated conical side portions of the reversing portion 30 are pushed by the left and right pushing bars 94 as shown in FIG. A recess R toward the inside of the main body 11 is formed. As a result, the recesses R (FIG. 20B) formed on the left and right side portions of the reversing portion 30 are provided along the boundary portion 17 of the bottom portion 15 and are thicker and harder because the perimeter is shorter than the trunk portion 12. The reversing unit 30 functions as a reversing guideline when the reversing unit 30 is pushed by the driving head 93 and reversed.

  (5) The container body 11 is released from being pressed by the container clamp 91 (FIG. 16A), and then the clamping by the driving guide 92 is released (FIG. 16B). By changing the order of releasing the container clamp 91 and the driving guide 92, the posture of the container body 11 can be prevented from being disturbed, and the phenomenon that the reversing part 30 returns to the outside and deforms to form a bulge can be prevented.

  (6) The pushing-in by the driving head 93 is released, and the driving / reversing of the reversing unit 30 is completed (FIGS. 13B and 17). By releasing the driving head 93 after releasing the container clamp 91 and the driving guide 92, it is possible to prevent the reversing portion 30 from deforming outward and deforming.

According to the filling port reversing process of the present embodiment, the following operational effects are obtained.
(a) Before sealing the filling port portion 32 of the container body 11, the standard outer shape of the container body 11 is pressed from the outside, and the filling port portion 32 is dropped into the inside of the container body 11 in a later process. The amount of air corresponding to the volume is discharged from the container body 11 in advance. Thereby, after sealing the filling port part 32 of the container main body 11 which discharged | emitted the air quantity corresponding to the dropping volume of the filling port part 32, the filling port part 32 can be stably dropped inside the container main body 11 without resistance. . And the container main body 11 after dropping the filling port part 32 exhibits a standard external shape.

  (b) A pedestal portion 31 as a filling port peripheral portion is formed between the reversing portion 30 and the filling port portion 32 of the container body 11, and the reversing portion 30 is reversed by pushing the pedestal portion 31 to the inside of the container body 11. Let By pushing the pedestal portion 31 as the peripheral portion of the filling port, the reversing unit 30 is reliably reversed without damaging the filling port portion 32 including the sealing seal portion 34, and the filling port portion 32 is placed inside the container body 11. Can be dropped.

  (c) When pressing the pedestal 31 as the peripheral portion of the filling port (b) described above, the container main body 11 is buckled by the pressing force of the pedestal 31 by keeping the internal pressure of the container main body 11 high. Therefore, the reversing unit 30 can be reliably reversed.

  (d) By pressing the upper half part of the trunk | drum 12 as a part away from the inversion part 30 of the container main body 11 of the above-mentioned (c) from the outside, it is as the state which raised the internal pressure of the container main body 11 reliably. I can leave.

  (e) By forming the recess R toward the inside of the container body 11 in the reversing part 30 of the above (c) and (d), the reversing part 30 can be easily reversed.

  According to the present invention, even a filling port portion of a container made of a single material can efficiently form a strong sealing seal portion in a short time.

DESCRIPTION OF SYMBOLS 10 Container 11 Container main body 16 Filling port formation part 30 Inversion part 31 Base part (filling port periphery part)
32 Filling port 34 Sealing seal 50 Cutter 51 Blade 51A, 51B Blade surface 52 Vibrator 53 Horn 70 Filling nozzle 80 Sealing machine 81 Heater 82 Container clamp 83 Pinch bar 84 Crimp bar 90 Reversing device 91 Container clamp 92 Driving guide 93 Driving head 94 Push bar

Claims (4)

It is a sealing method for a container that seals the filling port portion made flat by pinching the filling port portion with a pinch bar,
A container sealing method in which the tip of the filling port sandwiched between pinch bars is exposed, and the exposed tip of the filling port is heated and sealed.   The container sealing method according to claim 1, wherein the exposed tip of the filling port is heated by infrared irradiation.   The container sealing method according to claim 1 or 2, wherein a gap length is provided between the upper surface of the pinch bar and the focal point of the heat beam when the exposed tip of the filling port is heated by infrared irradiation.   The container sealing method according to claim 1, 2, or 3, wherein the container is crimped by sandwiching a tip end portion of the heated filling port with a crimping bar.

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