JP2012056105A - Receiving plate member and seal device using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a receiving plate member capable of properly thermocompression bonding overlapping plastic films at a relatively high temperature without holding the films between low-adhesion sheets.SOLUTION: The receiving plate member 31 is provided to a support block 30 holding overlapping plastic films F1, F2 to be thermocompression bonded between it and a pressure application block 20 and receives the plastic films F1, F2 to which the pressure is applied by the pressure application block 20. The receiving plate member includes a rubber plate member 31a formed of a heat resistant rubber, a heat resistant resin member 31b provided at one surface of the rubber plate member, and a heat resistant reinforcement member 31c provided at the other surface of the rubber plate member.

Description

  The present invention uses a receiving plate member that is provided on a support block that sandwiches an overlapping plastic film that is to be heated and pressure-bonded with a pressure block, and that receives the plastic film pressed by the pressure block, and the receiving plate member. The present invention relates to a sealing device.

  For example, in a bag making apparatus that manufactures a plastic film bag such as a pouch, a sealing apparatus that heat-processes overlapping plastic films is used. Conventionally, a structure in which a plastic film on which a heat seal bar covered with a low adhesive sheet (for example, a glass fiber reinforced fluororesin sheet) overlaps is pressed against a rubber (backing plate member) covered with a low adhesive sheet. Has been proposed (see Patent Document 1). In this sealing device, the rubber is attached to a rubber base heated by a heater, and an overlapping plastic film is pressed against the rubber by the heat seal bar while being sandwiched between two low-adhesive sheets. At that time, the plastic film is welded and heated at the welded portion by heating and pressurizing with the heat seal bar and heating from the rubber stand through the rubber. Since the plastic film to be heat-bonded is sandwiched between the two low-adhesive sheets in this way, when releasing the pressure of the heat seal bar and opening the space between the heat seal bar and the rubber, It is possible to prevent the welded portion of the film from sticking to the heat seal bar or rubber base. Moreover, the unevenness | corrugation pattern (for example, woven pattern of glass fiber) of the low-adhesion sheet pressed against the welding part of the plastic film can be attached, and the beauty of the sealing part can be improved.

JP 2001-310398 A

  By the way, in the conventional sealing device described above, the efficiency of heat transfer from the heat seal bar to the plastic film is sacrificed by the low adhesive sheet. For this reason, it is difficult to obtain high production efficiency. For example, when the set temperature of the heat seal bar is increased in order to improve the production efficiency, the life of the heat seal bar is shortened, and the cost is increased to maintain the long life. Further, when the set temperature of the heater provided on the rubber base to which the rubber (backing plate member) is attached is increased, the rubber heated only from the surface in contact with the rubber base may be warped or deformed. A proper seal cannot be guaranteed. Therefore, when you want to heat and pressure-bond plastic films with the heat seal bar and the rubber base set to the same temperature, if you set the temperature of the rubber base low enough that the rubber does not deform, you need to increase the heat seal bar set temperature further Occurs.

  The present invention has been made in view of such circumstances, and the pressed plastic film that enables appropriate thermocompression bonding at a relatively high temperature without sandwiching overlapping plastic films between low-adhesive sheets. The present invention provides a receiving plate member for receiving the same and a sealing device using the receiving plate member.

  The backing plate member according to the present invention is a backing plate member that is provided in a support block that sandwiches an overlapping plastic film that is to be thermocompression bonded with a pressure block, and that receives the plastic film that is pressurized by the pressure block, A rubber plate member formed of heat-resistant rubber; a heat-resistant resin member provided on one surface of the rubber plate member; and a heat-resistant reinforcing member provided on the other surface of the rubber plate member. It becomes composition.

  With such a configuration, since the rubber plate member made of heat-resistant rubber is provided, the cushioning property of the backing plate member to which the plastic film is pressed by the pressure block can be ensured. In addition, since the heat-resistant resin member is provided on one surface of the rubber plate member, if the plastic film is heat-pressed so as to abut against the heat-resistant resin member, the plastic film is heated after heating. It becomes easier to separate from the backing plate member (heat resistant resin member). Furthermore, since the heat-resistant reinforcing member is provided on the other surface of the rubber plate member, even when the receiving plate member is heated when the plastic film is heat-pressed at a higher temperature, the receiving plate member (rubber plate member) ) Can be prevented from being deformed.

  In the backing plate member according to the present invention, the thickness of the heat-resistant resin member is smaller than the thickness of the rubber plate member, and the thickness of the heat-resistant reinforcing member is smaller than the thickness of the rubber plate member. Can do.

  With this configuration, the thickness of the rubber plate member sandwiched between the heat-resistant resin member and the heat-resistant reinforcing member is set to be relatively large, so that the plastic film after heating is not impaired without impairing cushioning properties. The ease of separation can be maintained, and the effect of suppressing deformation such as warping can be maintained.

  The said heat resistant resin member and the said heat resistant reinforcement member can be comprised with the glass fiber reinforced heat resistant resin sheet of the same kind.

  The heat-resistant reinforcing member can be composed of a metal plate. In this case, deformation such as warping of the rubber plate member can be more reliably suppressed.

  A sealing device according to the present invention includes a pressure block and a support block disposed opposite to the pressure block, and is a seal that is thermocompression bonded with a plastic film overlapping between the pressure block and the support block interposed therebetween. The pressure block includes a press block that presses the plastic film against the support block, and a heating unit that heats the press block, and the support block receives any of the receiving blocks described above. It becomes the structure which has a board member and a heating part which heats this receiving board member.

  With such a configuration, the pressing block heated by the heating unit presses the overlapping plastic film against the receiving plate member heated by the heating unit in a state where the overlapping plastic film is sandwiched between the pressure block and the support block. . The overlapping plastic films heated from the receiving plate member side are thermocompression-bonded by heating and pressurizing the holding block. At this time, an appropriate thermocompression bonding can be performed by pressing the plastic film against the receiving plate member whose cushioning property is held by the rubber plate member in which deformation such as warping is suppressed by the heat resistant reinforcing member. And if it leaves | separates from the site | part by which the pressurization block overlaps the thermocompression bonding of the plastic film, this plastic film can leave | separate easily from the heat resistant resin member provided in the surface of the rubber plate member.

  In the sealing device according to the present invention, the heating portion of the support block includes a metal block and a heater provided in the metal block, and the receiving plate member is placed on the metal block. It can be.

  With such a configuration, the receiving plate member placed on the metal block is heated via the metal block heated by the heater. In this way, the receiving plate member placed on the metal block is prevented from being warped or deformed by the heat-resistant reinforcing member provided on the surface of the rubber plate member.

  Furthermore, in the sealing device according to the present invention, the heating unit of the pressure block and the heating unit of the support block may be set to the same heating temperature.

  Since the plastic film which overlaps at the temperature equivalent to the temperature from the pressure block side can be heated also from the support block side, the plastic film can be thermocompression bonded more efficiently.

  According to the backing plate member of the present invention, cushioning properties are ensured, the plastic film is more easily separated after heating, and deformation such as warping is effectively suppressed when the plastic film is thermocompression bonded at a higher temperature. As a result, it is possible to properly heat and pressure-bond the overlapping plastic films at a relatively high temperature without being sandwiched between the low-adhesive sheets.

It is a figure which shows the bag making apparatus with which the sealing apparatus which concerns on embodiment of this invention is applied. It is sectional drawing which shows the structure of the sealing device applied to the bag making apparatus shown in FIG. It is a fragmentary perspective view which shows the structure of the pressing block of the pressurization block in the sealing device shown in FIG. It is an enlarged view which shows the front end surface of the protrusion part of the presser block shown in FIG. It is sectional drawing which shows typically the external shape of the cross section of two holes (concave part) formed adjacent to a presser block, and the swelling part (convex part) formed in each edge. It is a fragmentary perspective view which shows the structure of the support block in the sealing device shown in FIG. It is sectional drawing which shows the state of the plastic film heat-pressed by the sealing apparatus shown in FIG. It is an enlarged view which expands and shows the crimping | compression-bonding part of the plastic film heat-pressed by the sealing apparatus shown in FIG. It is a top view which shows the external appearance of the bag manufactured by the bag making apparatus shown in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  A bag making apparatus to which a sealing device according to an embodiment of the present invention is applied is configured as shown in FIG.

  In FIG. 1, a bag making apparatus 200 includes a film supply unit 110 that supplies a raw material plastic film F that is a material of a bag (for example, a pouch) to be manufactured, and a raw material plastic film F that is supplied from the film supply unit 110. Is cut into two plastic films F1 and F2 having a predetermined width, and a film cutting processing unit 120 for sending each plastic film F1 and F2, and a plastic film F1 and F2 that are sent from the film cutting processing unit 120 and stacked one above the other. It has a seal processing part 100 that seals a predetermined part by thermocompression bonding, and a bag cutout part 130 that cuts the seal part of the plastic films F1 and F2 that are sealed and integrated to form a bag.

  The film supply unit 110 sends the raw plastic film F fed from the feed roller 111 to the film cutting processing unit 120 via the rotating rollers 112a, 112b, and 112c. The film cutting processing unit 120 includes a cutting machine 121. The cutting machine 121 cuts the raw plastic film F sent from the film supply unit 110 at the central portion in the width direction thereof, and the two plastic films F1. , And F2. One plastic film F1 is fed upward and supplied to the processing table 11 from above via rotating rollers 122a, 122b, and 122c, and the other plastic film F2 is fed downward and rotated by rotating rollers 123a, 123b, and 123c. Is supplied to the processing table 11 from below.

  On the processing table 11, the plastic film F <b> 1 from the upper side and the plastic film F <b> 2 from the lower side are overlapped and pass through the seal processing unit 100. In the seal processing section 100 on the processing table 11, a vertical sealing device 12a and a vertical cooling device 12b are installed, and a plurality of horizontal sealing devices 13a and a plurality of horizontal cooling devices 13b are installed. The vertical sealing device 12a seals the plastic film F1, F2 overlapped on the processing table 11 by heating and pressing the central part in the width direction in the longitudinal direction (conveying direction), and the vertical cooling device 12b is heat-pressed in the longitudinal direction. Cool the sealed part. Each of the plurality of horizontal sealing devices 13a seals the overlapping plastic films F1 and F2 in the width direction (the direction orthogonal to the conveying direction) by thermocompression at a predetermined interval in multiple stages, and each of the plurality of horizontal cooling devices 13b. Cools the seal portion that is heat-pressed in the width direction of the overlapping plastic films F1, F2. The plurality of horizontal sealing devices 13a heat-press the same part (the entire width direction) of the plastic films F1 and F2. Even if the heating temperature is set to the same temperature, for example, the downstream side in the transport direction It may be set so as to become gradually higher toward.

  The bag cutout unit 130 has a cutter 14. The cutter 14 continuously cuts the sealing part heat-pressed by the vertical sealing device 12a of the overlapping plastic films F1, F2, and intermittently cuts the sealing part heat-pressed by the horizontal sealing device 13a. As a result, as shown in FIG. 9, the seal portion heat-pressed by the vertical seal device 12a becomes the bottom seal portion 41, and the end facing the bottom seal portion 41 becomes the open end portion 42, and the horizontal seal device 13a Two bags 40 each having the sealed portions as side seal portions 43a and 43b are sequentially formed. A vertical sealing device may be provided at both ends in the width direction, and the center of the overlapping plastic films F1 and F2 may be continuously cut so that the open ends of the bags face each other. Further, a plurality of vertical sealing devices may be appropriately arranged to form three or more bags in the width direction.

  The vertical sealing device 12a and each horizontal sealing device 13a are configured as shown in FIG. 2, for example. In addition, since the vertical sealing device 12a and the horizontal sealing device 13a have the same structure, hereinafter, they are collectively referred to simply as a sealing device.

  In FIG. 2, the sealing device includes a pressure block 20 and a support block 30. The pressure block 20 is disposed on the upper side and the support block 30 is disposed on the lower side so as to face each other. Between the pressure block 20 and the support block 30, the plastic films F1 and F2 that overlap as described above are intermittently conveyed while being in sliding contact with the surface of the support block 30 (in FIG. 2, the vertical sealing device 12a). In this case, the transport direction is the direction A perpendicular to the paper surface. The plastic film F1 and F2 which the pressure block 20 to descend | fall and the fixed support block 30 overlap are pinched | interposed.

  The pressure block 20 has a structure in which a metal presser block 21 and a heat block 22 (heating unit) are integrally fixed. The presser block 21 is formed by a base portion 21b fixed to the heat block 22 and a rectangular parallelepiped protruding portion 21a protruding from the central portion of the base portion 21b. Two linear heaters 22 a and 22 b are provided in the heat block 22.

  A large number of fine holes (concave portions) 210 are formed on the distal end surface of the protruding portion 21a of the presser block 21 as shown in FIG. The large number of fine holes 210 are formed so as to press against the tip surface of the protruding portion 21a while rotating a knurled piece having a conical pointed protrusion (for example, a quadrangular pyramid-shaped protrusion) regularly formed on the surface. Formed by rolling process. For this reason, the numerous holes 210 formed in the tip surface of the protrusion 21a of the presser block 21 have a shape corresponding to the shape of the cone-shaped sharp protrusion of the knurled piece, and are arranged according to a rule corresponding to the arrangement rule. ing. For example, as shown in FIG. 4, a row of holes 210 arranged in the longitudinal direction (lateral direction in the drawing) at a predetermined pitch is shifted by a half pitch in the longitudinal direction on the distal end surface of the protrusion 21a of the presser block 21. However, they are formed so as to be arranged at a predetermined pitch in the width direction (vertical direction in the drawing). As a result of this arrangement, every three holes 210 are located at the vertices of an equilateral triangle. The longitudinal direction corresponds to the conveying direction A of the plastic films F1 and F2 to be heat-pressed in the vertical sealing device 12a, and the width direction is the plastic films F1 and F2 to be heat-pressed in the horizontal sealing device 13a. This corresponds to the transport direction B.

  As shown in FIG. 4, each hole 210 becomes a quadrangular concavity that opens in a rectangular shape corresponding to the shape of the sharp protrusion of the knurled piece, and the diagonal line of the opening shape matches the longitudinal direction or the width direction. (See the broken line in FIG. 4). Further, the sharp protrusions of the knurled piece are pressed against the tip surface of the protruding portion 21a to form each hole 210, so that the metal is accumulated around the hole 210 where the metal of the portion where the sharp protrusion is pressed is formed. Therefore, a swelled portion (convex portion) 211 that rises from the formation surface of the hole 210 (the tip end surface of the protruding portion 21a) is formed at the periphery of each hole 210. The arrangement of the holes 210 shown in FIG. 4 is an example, and may be located at the vertices of an isosceles triangle, or may be arranged without shifting the pitch. The arrangement direction does not need to match the longitudinal direction or the width direction, and may be inclined. In short, the holes 210 may be arranged in an orderly manner. Moreover, the opening shape corresponding to the shape of the sharp protrusion of the knurled piece is not limited to a rectangular shape, and may be a rhombus shape, a parallelogram shape, a turtle shell shape, or a circular shape.

  FIG. 5 is a cross-sectional view of two adjacent holes 210 (concave portions) formed on the front end surface of the protruding portion 21a of the presser block 21 and a raised portion 211 (convex portion) formed at each edge (one oblique point in FIG. 4). It is a figure which shows typically the outline (profile) of the cross section of a dashed line direction. As shown in FIG. 5, the height h1 of the raised portion 211 from the reference surface (the formation surface of the hole 210) is smaller than the depth h2 of each hole 210 from the reference surface. The depth h2 from the reference plane of each hole 210 is set within a range of 50 μm to 100 μm, for example. The height h1 of the raised portion 211 from the reference surface is, for example, about 10 μm to 20 μm, and is smaller than the thickness (for example, 100 μm) of the plastic films F1 and F2 to be heat-pressed. The pitch L2 of the holes 210 is set within a range of 0.4 to 1.0 mm, for example. The raised portions 211 formed at the peripheral edges of the adjacent holes 210 do not overlap, and the length L1 between the tops of the adjacent raised portions 211 is, for example, about 250 μm to 650 μm, and the opening diameter L2− of each hole 210 is L1 is, for example, about 160 μm to 300 μm.

  Fluorine resin-dispersed metal plating (so-called Teflon (registered trademark) plating) is applied to the distal end surface of the protruding portion 21a of the presser block 21 in which a large number of holes 210 are formed.

  Moreover, the support block 30 is provided with the receiving plate member 31 and the metal heat block 32 (heating part), as shown in FIG. 6 with FIG. The backing plate member 31 is formed by attaching a heat resistant resin sheet 31b (heat resistant resin member) to the surface of the plastic film F1, F2 side of a rubber plate member 31a made of silicon rubber (heat resistant rubber). It has a structure in which a heat resistant reinforcing sheet 31c (heat resistant reinforcing member) is attached to the surface opposite to the plastic films F1, F2. Both the heat-resistant resin sheet 31b and the heat-resistant reinforcing sheet 31c can be formed of a fluororesin (for example, Teflon (registered trademark)) sheet reinforced with the same type of glass fiber. The overall thickness of the backing plate member 31 is set, for example, within a range of 1 mm to 10 mm, and the thickness of each of the heat resistant resin sheet 31b and the heat resistant reinforcing sheet 31c is smaller than the thickness of the rubber plate member 31a. Is set.

  In the heat block 32, linear heaters 32a and 32b are provided as in the case of the pressure block 20. The support block 30 has a structure in which the receiving plate member 31 is placed on the heat block 32 without being fixed by bonding, screwing or the like, and is supported by the heat block 32 heated by the linear heaters 32a and 32b. Overlapping plastic films F1 and F2 to be heat-bonded are heated through a receiving plate member 31 to be heated. In addition, since the receiving plate member 31 is not fixed on the heat block 32, for example, replacement at the time of maintenance is easy, but of course, it may be fixed to the heat block 32 by screwing, a hook, or the like.

  In the sealing device as described above, the linear heaters 22a and 22b in the heat block 22 of the pressure block 20 are energized, and the presser block 21 is heated by the heat block 22 heated by the linear heaters 22a and 22b. And maintained at a predetermined temperature. The linear heaters 32a and 32b in the heat block 32 of the support block 30 are also energized, and the receiving plate member 31 is heated to a predetermined temperature by the heat block 32 heated by the linear heaters 32a and 32b. Maintained. In this state, when the pressure block 20 is lowered by a pressure mechanism (not shown) and the plastic films F1 and F2 where the pressure block 20 and the support block 30 overlap are sandwiched as shown in FIG. The plastic films F <b> 1 and F <b> 2 with which the tip surfaces of the protrusions 21 a of the presser block 21 of the block 20 overlap are pressed against the receiving plate member 31 of the support block 30.

  When the plastic films F1 and F2 with which the presser block 21 of the pressurizing block 20 overlaps are pressed against the receiving plate member 31 of the support block 30, as shown in an enlarged view in FIG. The raised portions 211 that rise from the respective edges of the numerous holes 210 formed on the surface bite into the plastic film F1. For this reason, the overlapping plastic films F1 and F2 are directly pressed by the presser block 21 of the pressurizing block 20 while their displacement is suppressed. As a result, the overlapping plastic films F1 and F2 are heat-bonded without any deviation as much as possible, and the generation of wrinkles or the like in the heat-bonded portion is minimized, and a more appropriate seal is possible.

  And since the raised part 211 which protrudes from the edge of the adjacent hole 210 does not overlap (refer FIG. 5), each raised part 211 comes to bite into the plastic film F1 independently. For this reason, each bulge part 211 can bite into the plastic film F1 reliably without being influenced by the other bulge part 211.

  In the sealing device described above, the heating temperature of the heat block 22 on the pressure block 20 side is set to a predetermined temperature within a range of 180 ° C. to 200 ° C., for example, when the inner surface of the plastic film is polypropylene, The heating temperature of the heat block 32 on the support block 30 side is also set to the same predetermined temperature as the pressure block 20 side. The heating temperature of the heat block 22 on the pressure block 20 side is the heating temperature of the pressure block in a conventional sealing device that heat-presses an overlapping plastic film between two low adhesive sheets, for example, 230 ° C. to Low compared to 260 ° C. However, since the presser block 21 heated by the heat block 22 directly contacts the plastic films F1 and F2, the pressure of the plastic films F1 and F2 and the temperature of the heated portion can be the same as or higher than the conventional one.

  Thus, even if the plastic films F1 and F2 are heated and pressurized at a relatively high temperature by the protruding portion 21a of the presser block 21, the distal end surface of the protruding portion 21a is subjected to fluororesin-dispersed metal plating. In addition, the air in each hole 210 expands and compresses the plastic films F1 and F2, and each hole 210 becomes a cone shape (quadrangular pyramid shape) and becomes narrower toward the back, and the plastic films F1 and F2 become each hole 210. It is difficult to enter the inside (see FIG. 8), and the height of the raised portion 211 formed at each edge of each hole 210 is smaller than the depth of each hole 210 and smaller than the thickness of the plastic films F1 and F2. In combination with the fact that excessive biting of each raised portion 211 into the plastic film F1 is prevented, etc. Plastic films F1, F2 tends further from the projecting portion 21a of the click 21.

  The heating temperature of the heat block 32 on the support block 30 side can be higher than the heating temperature in the conventional sealing device, for example, 100 ° C. to 130 ° C. Furthermore, since the receiving plate member 31 heated by the heat block 32 directly contacts the plastic films F1 and F2, the heating temperature from the receiving plate member 31 side of the plastic films F1 and F2 becomes considerably higher than the conventional one.

  Thus, even if the receiving plate member 31 is at a relatively high temperature, the glass fiber reinforced fluororesin sheet that becomes the heat resistant reinforcing sheet 31c attached to the opposite side of the plastic film of the rubber plate member 31a of the receiving plate member 31 is used. Therefore, deformation of the rubber plate member 31a is suppressed, and the deformation of the rubber plate member 31a is also caused by a glass fiber reinforced fluororesin sheet pasted as a heat resistant resin sheet 31b on the plastic film side of the rubber plate member 31a. Therefore, the overlapping plastic films F1 and F2 pressed by the presser block 21 can be properly received by the receiving plate member 31 while ensuring cushioning properties by the rubber plate member 31a. In addition, since the plastic film is relatively easily separated from the heat-resistant resin sheet 31b (glass fiber reinforced fluororesin sheet) attached to the plastic film side of the rubber plate member 31a of the backing plate member 31 that is relatively high temperature, The plastic films F1 and F2 are more easily separated from the receiving plate member 31.

  Thus, even if the plastic films F1 and F2 that are overlapped at a relatively high temperature by the pressurization block 20 and the support block 30 are heated and pressed, the plastic films F1 and F2 are not pressed into the pressurization block 20 (the protruding portion of the presser block 21). 21a) and the support block 30 (the receiving plate member 31) can be easily separated without sticking to each other, so that the plastic films F1 and F2 can be heat-bonded at a relatively high temperature. As a result, thermocompression bonding is possible in a short time, and the overlapping plastic films F1 and F2 can be thermocompression bonded more efficiently.

  In addition, since a large number of holes 210 are regularly arranged in the front end surface of the protruding portion 21a of the presser block 21 in the pressurizing block 20, the plastic that is pressed and thermocompressed by the front end surface. The thermocompression bonding portion of the sheet is provided with a concavo-convex pattern due to a large number of regularly arranged holes 210 (see FIG. 9), so that the beauty of the seal portion can be improved.

  In addition, as a heat-resistant reinforcement sheet 31c affixed on the opposite side to the plastic film of the rubber plate member 31a of the backing plate member 31, a metal plate, a glass fiber reinforced epoxy plate, etc. other than a glass fiber reinforced fluororesin sheet can be used. .

  In addition, the basic structure of each of the vertical cooling device 12b and the plurality of horizontal cooling devices 13b is the same as that of the sealing device described above. However, the pressure block 20 and the support block 30 are not provided with the linear heaters 22a, 22b, 32a, and 32b, and instead of the heat blocks 22 and 32, simple metal blocks are used. It is also possible to allow the coolant to pass through these metal blocks. In the pressure block 20, the presser block 21 having the above-described structure is fixed to a metal block used instead of the heat block 22. Further, in the support block 30, the receiving plate member 31 having the above-described structure is placed on a metal block used instead of the heat block.

  As described above, the backing plate member and the plate sealing device using the same according to the present invention can be appropriately heat-pressed at a relatively high temperature without sandwiching the overlapping plastic films between the low-adhesive sheets. And is useful as a backing plate member for a support block in a sealing device used for heat-pressing overlapping plastic films.

DESCRIPTION OF SYMBOLS 11 Processing stand 12a Vertical sealing apparatus 12b Vertical cooling apparatus 13a Horizontal sealing apparatus 13b Horizontal cooling apparatus 14 Cutter 20 Pressure block 21 Presser block 21a Protrusion part 21b Base part 22, 32 Heat block (heating part)
22a, 22b, 32a, 32b Linear heater 210 Hole (concave)
211 Swelling part (convex part)
30 support block 31 backing plate member 31a rubber plate member 31b heat resistant resin sheet (heat resistant resin member)
31c Heat-resistant reinforcement sheet (heat-resistant reinforcement member)
40 Bag 41 Bottom seal part 42 Open end part 43a, 43b Side seal part 100 Seal processing part 110 Film supply part 111 Delivery roller 112a, 112b, 112c, 122a, 122b, 122c, 123a, 123b,
123c Rotating roller 120 Film cutting part 121 Cutting machine 130 Bag cutting part 200 Bag making apparatus

Claims (9)

A support plate member that is provided on a support block that sandwiches an overlapping plastic film to be thermocompression bonded with a pressure block, and that receives the plastic film that the pressure block pressurizes,
A rubber plate member formed of heat-resistant rubber;
A heat resistant resin member provided on one surface of the rubber plate member;
A backing plate member having a heat resistant reinforcing member provided on the other surface of the rubber plate member.   The backing plate member according to claim 1, wherein a thickness of the heat resistant resin member is smaller than a thickness of the rubber plate member.   The backing plate member according to claim 1 or 2, wherein a thickness of the heat resistant reinforcing member is smaller than a thickness of the rubber plate member.   The backing plate member according to any one of claims 1 to 3, wherein the heat resistant resin member is a glass fiber reinforced heat resistant resin sheet.   The backing plate member according to any one of claims 1 to 4, wherein the heat resistant reinforcing member is a glass fiber reinforced heat resistant resin sheet.   The receiving plate member according to claim 1, wherein the heat resistant reinforcing member is a metal plate. A sealing device comprising a pressure block and a support block disposed opposite to the pressure block, wherein the pressure block and the support block sandwich a plastic film that overlaps the pressure block,
The pressing block is a pressing block that presses the plastic film against the support block;
A heating unit for heating the presser block,
The support block includes a backing plate member according to any one of claims 1 to 6,
And a heating device for heating the backing plate member. The heating part of the support block has a metal block and a heater provided in the metal block,
The sealing device according to claim 7, wherein the backing plate member is placed on the metal block.   The sealing device according to claim 7 or 8, wherein the heating unit of the pressure block and the heating unit of the support block are set to the same heating temperature.

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