JP2004050399A - End processing method and end processing device for hollow resin plate material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simply seal an end of a hollow resin plate material without requiring much time and labor. <P>SOLUTION: A heating welding part 78 is provided at an inner side of a cutting blade 46 for punching the hollow resin plate material 2 to a predetermined shape. The heating welding part 78 is supported to a galvanized sheet iron 74 through a plywood 70 and a heat insulation material 72 as well as the cutting blade 46 and is heated by a heater 76 through the galvanized sheet iron 74. Further, the heat welding part 78 is butted to a cutting end until the cutting blade 46 completely finishes to cut the hollow resin plate material 2 and clamps the cutting end with a frame body 56 disposed just below it from both front and back sides to seal it. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an end processing method and an end processing apparatus for a hollow resin plate material having a number of ribs interposed between a pair of parallel liner plates.
[0002]
[Prior art]
Conventionally used cardboard made of paper is light and inexpensive, but is very brittle in material and deteriorates drastically, and its strength is extremely reduced when wet with rainwater, so that repeated use cannot be expected. Therefore, recently, a sheet material made of a synthetic resin has been used in place of the paper cardboard. This synthetic resin plate material is formed of a synthetic resin such as polypropylene (PP). As shown in FIG. 12, a large number of ribs 6 are arranged in parallel between a pair of liner plates 4 arranged opposite to each other. It is a plate material 2 having a hollow cross section (hereinafter, referred to as a hollow resin plate material) having a structure similar to that of a conventional cardboard made of paper. The box manufactured using such a hollow resin plate 2 has an extremely high strength as compared with a box made of paper, and has an excellent point that it is extremely lightweight because it is formed to have a hollow cross section. Have. In addition, since it is formed of a synthetic resin, its strength does not decrease even when it is wet with rainwater, and can be repeatedly washed and used. It can be used for a long time as a tray or the like.
[0003]
However, since the hollow resin plate has a large number of openings at its ends, foreign substances such as rainwater, dirt, and dust may enter through the openings during repeated use. In addition, when washing is performed, water and a detergent component enter the hollow portion from the opening, and there is a problem that the liquid component remains in a normal drying process, which is unsanitary. In particular, the translucent or transparent hollow resin plate material has a problem that the invading foreign matter is visible from the outside and the appearance is deteriorated. In order to prevent foreign matter from entering, end processing for sealing the opening is conventionally performed.
[0004]
As a method of the end treatment, there are known a method in which the end of the hollow resin plate material is sandwiched between upper and lower portions by a hot plate and sealed by heat welding, and a method in which the sealing is performed by ultrasonic heat welding. In addition, besides this, a method of bending and sealing the end of the hollow resin plate (see, for example, Patent Document 1), and a method of melting the end of the hollow resin plate to form a predetermined shape and seal ( For example, refer to Patent Document 2.
[0005]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2000-190384 (Pages 1-7, FIGS. 1-4)
[0006]
[Patent Document 2]
JP-A-2000-158530 (pages 1-7, FIG. 1-6)
[0007]
[Problems to be solved by the invention]
However, these end processing methods require accurate positioning with respect to the hollow resin plate in order to perform processing on the end of the hollow resin plate, which is extremely troublesome. In addition, each end must be individually processed, which requires a great deal of labor and labor, resulting in a significant increase in cost. On the other hand, in order to solve such a problem, it has been proposed to perform the end treatment on each end at the same time. However, in this method, a separate welding device is required for each end, and equipment is required. A new problem has arisen in that the costs increase significantly. Also, when the hollow resin plate material is cut and then processed at the end, the shape of the end is broken by heating during the end processing, and the shape is adjusted later, or high accuracy is required for the welding temperature. And other problems.
[0008]
The present invention has been made in view of such circumstances, and an object thereof is to provide an end portion of a hollow resin plate material that can easily seal the end portion of the hollow resin plate material without much labor and effort. An object of the present invention is to provide a processing method and an end processing device.
[0009]
[Means for Solving the Problems]
In order to achieve such an object, in the method for treating an end portion of a hollow resin plate material according to the present invention, a hollow resin plate material having a number of ribs interposed between a pair of parallel liner plates is predetermined by a cutting blade. In the method of punching into a shape, a heat welding portion is provided on the inside or both inside and outside of the cutting blade, and at the time of the punching, the liner plates are welded to each other by the heat welding portion at the same time, and obtained by the punching. A seal portion is provided at an end of the hollow resin plate material (claim 1).
[0010]
Further, in the end processing apparatus of the hollow resin plate material according to the present invention, a cutting blade for punching a hollow resin plate material having a number of ribs between a pair of parallel liner plates into a predetermined shape, A heat-welding portion disposed on the inner side or both inside and outer sides of the cutting blade, wherein the heat-welding portion welds the liner plates to each other at the time of the punching, and obtains a hollow resin obtained by the punching. A seal portion is provided at an end of the plate material (claim 5).
[0011]
In these methods or devices, a heat welding portion is provided on the inside or inside and outside of the cutting blade, and when the hollow resin plate material is punched into a predetermined shape, the liner plates are mutually welded by the heat welding portion. Since the seal portion is provided at the end of the hollow resin plate material obtained by punching, accurate positioning of the hollow resin plate material is not required in the end processing as in the conventional case, and the end portions are individually formed for each end. Since there is no need to perform processing, a great deal of labor and labor can be greatly reduced, and a significant cost reduction can be achieved. Also, since the seal is formed at the same time as the cutting, the shape collapses during welding as in the past, and it is not necessary to adjust the shape later. An edge treatment can be applied.
[0012]
Further, in the method, an elastic body is provided on both sides of the cutting blade and the heat welding portion or on both sides of the pair of heat welding portions, respectively. It is preferable that the hollow resin plate is pressed by a body (claim 2). In the apparatus, the cutting blade and the heat welding portion are disposed on both sides or the pair of heat welding portions on both sides, and the elasticity that presses the hollow resin plate material during the welding and punching is provided. Preferably, the body is provided (claim 6). If such an elastic body is provided, the position can be prevented by pressing the hollow resin plate during welding and punching.
[0013]
Further, in the method, another heat-welding portion facing the heat-welding portion is provided, the hollow resin plate material is sandwiched between these heat-welding portions, and the sealing is performed by heating from both upper and lower surfaces. It is preferable to provide a portion (claim 3). Further, in the above-mentioned apparatus, it is preferable that the apparatus further includes another heat welding portion which is disposed opposite to the heat welding portion, and the sealing portion is provided by sandwiching the hollow resin plate between the heat welding portion and the sealing portion. Preferred (claim 7). If such another heat welding portion is provided, the hollow resin plate material can be heated from both upper and lower surfaces, and a good sealing portion can be provided.
[0014]
Further, in these methods or apparatuses, the another heat-welding section is constituted by a frame made of a high heat conductive material provided along a cutting line of the cutting blade, and heat supplied from a heater. It is preferable to heat the hollow resin plate material by the method (claims 4 and 8).
[0015]
In this way, the another heat welding portion is constituted by a frame made of a high heat conductive material provided along the cutting line of the cutting blade, and by heating the hollow resin plate by the heat provided from the heater, The desired portion can be heated with a very simple configuration. In other words, it is not necessary to prepare a heater for the shape of the punching die for each die, and the heater can be implemented very economically.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a method of processing an end portion of a hollow resin plate material and an end processing device according to the present invention, and a method of manufacturing a case blank and a method of manufacturing a box will be described as typical examples. 1 to 8 illustrate an embodiment of the present invention. 1 shows an embodiment of the case blank, FIG. 2 shows the appearance of the end of the case blank, FIGS. 3 to 6 show one embodiment of a method and an apparatus for manufacturing the case blank, FIG. 7 shows a state in which a box is manufactured using the case blank, and FIG. 8 shows an appearance of the manufactured box.
[0017]
First, the case blank manufactured here will be described. The case blank 10 is a box component for forming a box, and is manufactured from, for example, a hollow resin plate 2 as shown in FIG. As described above, the hollow resin plate 2 is formed of various synthetic resins such as polypropylene (PP), and has a hollow cross section having the same structure as a conventional paper cardboard. A pair of liner plates 4 arranged in parallel to each other, and a number of ribs 6 interposed in the gap between the liner plates 4 by connecting the liner plates 4 to each other. The ribs 6 are arranged linearly in parallel with the plate surface direction of the hollow resin plate material 10 and in parallel with an interval therebetween, and a tubular hollow portion 8 is formed between the ribs 6.
[0018]
As shown in FIG. 1, the case blank 10 has two side plates 12a and 12b forming side plates of a box, and two upper surfaces integrally and continuously provided on the upper side of each of the side plates 12a. Flaps 14a, 14b, two lower flaps 16a, 16b which are also provided integrally and continuously on the lower sides of these side plates 12a, 12a, respectively, and are integrated with the sides of one side plate 12a. And a joining margin portion 18 provided continuously in a continuous manner.
[0019]
Notches 36 are provided along the boundaries between the upper flaps 14a and 14b and between the lower flaps 16a and 16b. Between the upper surface flaps 14a, 14b and the side plate portions 12a, 12b, between the lower surface flaps 16a, 16b and the side plate portions 12a, 12b, between the side plate portion 12a and the joining portion 18, and between the side plate portions 12a , 12b are formed with bent portions 20, 22, 24, 26 along their boundaries, respectively. In addition, seal portions 28, 30, 32, and 34 for closing the end openings are respectively provided on the outer edges of the upper surface flaps 14a and 14b, the lower surface flaps 16a and 16b, and the joining margin portion 18. (A hatched portion) is provided.
[0020]
FIG. 2 shows an embodiment of the seal portions 28, 30, 32, and 34, respectively. As shown in FIG. 2, the seal portions 28, 30, 32, 34 are formed by welding the ends of the liner plates 4a, 4b on both the upper and lower sides to each other over a predetermined width.
In the case blank 10, since such seal portions 28, 30, 32, and 34 are continuously formed along the outer edge thereof, foreign matters such as rainwater, dust, dust, and cleaning liquid enter the inside. Can be reliably prevented.
In the present embodiment, as for the bent portions 20, 22, 24, and 26, similarly to the seal portions 28, 30, 32, and 34, the liner plates 4a and 4b on both the upper and lower sides mutually cross over a predetermined width. It is provided by being welded and joined.
[0021]
A method and an apparatus for manufacturing such a case blank 10 will be described.
3 to 6 show one embodiment of the manufacturing apparatus. This manufacturing apparatus is an apparatus for manufacturing a case blank 10 by punching a hollow resin plate material 2 into a predetermined shape. In the present embodiment, furthermore, in the present embodiment, at the same time as the punching, the sealing portion 28 , 30, 32, 34, etc. can be provided.
[0022]
As shown in FIG. 3, the apparatus includes an upper die 42 and a lower die 44. The upper die 42 has a cutting blade 46 for punching the hollow resin plate 2 into a predetermined shape, a punching die 48, A part 50, a heat insulating part 52, and an upper support part 54 are provided. On the other hand, the lower die 44 is provided with a frame body 56, a low heat conductive material (82) (not shown), a lower heating unit 58, a heat insulating unit 60, and a lower support unit 62. In this apparatus, the hollow resin plate material 2 is sandwiched between the upper mold 42 and the lower mold 44 and cut.
[0023]
FIG. 4 shows a state of a cutting section of the apparatus. As shown in FIG. 4A, the cutting blade 46 is supported by a tin 74 via a plywood 70 and a heat insulating material 72. A heater 76 is provided on the tin 74, and the cutting blade 46 is heated by the heater 76 via the tin 74.
[0024]
Inside the cutting blade 46, a heat welding portion 78 is provided adjacent thereto. The heat welding portion 78 is supported by a tin 74 via a plywood 70 and a heat insulating material 72, similarly to the cutting blade 46, and is heated by the heater 76 via the tin 74. Then, when the cutting blade 46 cuts the hollow resin plate material 2, the heat welding portion 78 forms the seal portions 28, 30, 32, 34 at the end of the case blank 10 obtained by the cutting. ing.
[0025]
Further, the tip of the cutting blade 46 protrudes from the tip of the heat welding portion 78. That is, a step M is provided between the tip of the cutting blade 46 and the tip of the heat welding portion 78 as shown in FIG. 4B. The step M is provided at the end of the case blank 10 to form the seal portions 28, 30, 32, and 34. Set to dimensions. In this embodiment, it is 0.3 mm. A practically preferable range is about 0.1 mm to 1.0 mm.
[0026]
Further, a pair of elastic bodies 80 are arranged on both sides of the cutting blade 46 and the heat welding portion 78 so as to sandwich them. The elastic body 80 is formed of various rubber materials including silicon rubber and other elastic materials, and is provided to protect the cutting blade 46 and the heat welding portion 78 from the outside. The surface of the hollow resin plate 2 is brought into contact with the surface of the hollow resin plate 2 to be pressed. In the present embodiment, the elastic body 80 has a step of about 4 mm between the elastic body 80 and the heat-welded portion 78.
[0027]
On the other hand, the lower die 44 is provided with a frame 56 corresponding to the cutting blade 46 and the heat welding portion 78. The frame 56 is formed of a material having high thermal conductivity such as a metal such as iron, and is disposed on the lower heating unit 58. The lower heating section 58 is a planar heater, and heats the frame 56. As a result, the frame body 56 is configured to sandwich the hollow resin plate 2 together with the above-described heat welding portion 78 of the upper mold 42 from above and below at the time of cutting and heat-weld the frame member 56.
[0028]
FIG. 5 shows an arrangement state of the cutting blade 46, the heat welding portion 78, and the elastic body 80. FIG. 6 shows an arrangement state of the frame body 56. As shown in FIG. 5, the cutting blade 46 is arranged corresponding to the contour of the case blank 10 in order to punch the case blank 10 from the hollow resin plate 2. Further, in the present embodiment, the cutting blades 46 are arranged corresponding to the cut portions 36 of the case blank 10. On the other hand, the heat welding portion 78 is arranged inside or on both sides of the cutting blade 46 along the inner periphery thereof, and in the present embodiment, also corresponds to the bent portions 20, 22, 24, 26 of the case blank 10. It is arranged. The elastic body 80 is arranged along both sides of the cutting blade 46 and the heat welding portion 78 so as to sandwich the cutting blade 46 and the heat welding portion 78. In the present embodiment, the bent portions 20, 22, 24 of the case blank 10 are provided. , 26 are arranged along both sides thereof, corresponding to the heat welding portions 78 arranged.
[0029]
On the other hand, as shown in FIG. 6, the frame body 56 is arranged corresponding to the arrangement position of the cutting blade 46 and the heat welding portion 78 described above. That is, the frame body 56 is arranged corresponding to the contour of the case blank 10 and also arranged corresponding to the cut portion and the bent portion of the case blank 10.
[0030]
When cutting the hollow resin plate 2, the upper mold 42 is lowered so as to be in close contact with the lower mold 44. Then, first, the elastic body 80 comes into contact with the upper surface of the hollow resin plate material 2 and further lowers the upper die, whereby the elastic body 80 is gradually compressed. By this compression, the hollow resin plate 2 is pressed and fixed by the upper mold 42 via the elastic body 80. When the upper die 42 is further lowered, the cutting blade 46 comes into contact with the hollow resin plate 2 to cut the hollow resin plate. Further, before the cutting blade 46 completes the cutting of the hollow resin plate material 2, the heat welding portion 78 abuts on the cut end and sandwiches the end together with the frame 56 of the lower mold 44 from both upper and lower sides. As a result, the liner plates 4a, 4b on the upper and lower sides are welded to each other and joined to each other at the cut end, thereby forming the seal portions 28, 30, 32, and 34 as described above.
[0031]
Therefore, at the same time as the case blank 10 is punched out of the hollow resin plate material 2 and manufactured, the outer edge of the case blank 10 can also be sealed, whereby the case blank 10 whose end is sealed can be removed once. It can be easily obtained in the process.
[0032]
In addition, when the lower heating section 58 is configured by a planar heater, a general-purpose flat heater can be employed, thereby making it possible to configure the apparatus very inexpensively. This makes it possible to heat a desired portion with a very simple configuration, and therefore, it is not necessary to separately prepare a heater suitable for the shape of the punching die, and it is very economical to carry out. it can.
[0033]
In the above-described embodiment, the elastic body 80 is continuously provided along both sides of the cutting blade 46 or the heat welding portion 78. However, the present invention is not limited to such a case. Instead, it may be arranged on both sides of the cutting blade 46 or the heat welding portion 78 so as to be partially divided.
[0034]
Further, inside the frame 56, a low thermal conductive material such as asbestos, an inorganic material having thermal conductivity similar thereto, or veneer may be disposed so as to cover the lower heating portion 58. By arranging the low thermal conductive material in this manner, the hollow resin plate 2 can be supported from below, thereby preventing the hollow resin plate 2 from causing a problem such as warpage. . In particular, when the inner area of the frame body 56 is large, the hollow resin plate 2 can be sufficiently prevented from warping only by disposing the low thermal conductive material partially at the center or the like.
[0035]
When a box made of synthetic resin is manufactured using the case blank 10 thus manufactured, the two case blanks 10a and 10b are joined to each other via a margin 18 as shown in FIG. Connect together. Here, the joining portion 18 is arranged outside the box. This is because if the joining portion 18 is inside the box, foreign substances such as dust, dust, and cleaning agents may enter between the joining portion and the side plate portions 12b of the case blanks 10a and 10b. is there. On the other hand, the upper flaps 14a and 14b and the lower flaps 16a and 16b are folded inward via the bent portions 20 and 22, respectively, and overlap each other to form the bottom and the lid of the box.
[0036]
FIG. 8 shows one embodiment of the manufactured box 50. As shown in FIG. 8, by opening the top flaps 14a and 14b, various items such as food can be stored inside the box 50.
[0037]
As described above, in this embodiment, the hollow portions 2, 30, 32, and 34 can be provided on the peripheral portion of the case blank 10 at the same time as the case blank 10 is obtained by punching the hollow resin plate 2. In addition, the end processing does not require accurate positioning of the hollow resin plate material 2 and the end processing does not need to be performed individually for each end, so that a great deal of labor and labor is greatly reduced. , And a significant cost reduction can be achieved. In addition, the end processing can be performed very easily without the need for the shape to be lost during welding as in the prior art and the shape to be adjusted later, and the welding temperature to be required to have high accuracy.
[0038]
In the above-described embodiment, a box is manufactured by using two case blanks 10 having the same size and shape. However, the present invention is not limited to this, and one or three or more cases are manufactured. A box may be manufactured using the case blank 10. Further, in the hollow resin plate material according to the present invention, a hollow resin plate material having another cross-sectional shape may be used in addition to the above-described ones.
[0039]
Further, in the present embodiment, the heat welding portion 78 is provided only inside the cutting blade 46, that is, only on one side. However, the present invention is not limited to such a case. It may be arranged on both sides of the inside and outside. Further, the low thermal conductive material 82 is provided only inside the frame 56. However, the present invention is not limited to such a case. It may be provided so as to cover the entire surface of the portion 58.
[0040]
Further, as the form of the sealing portion of the hollow resin plate material 2 according to the present invention, in addition to the form shown in FIG. 2, the ends of the liner plates 4a and 4b on the upper and lower sides as shown in FIG. The plate material 2 may be welded and joined in the vicinity of substantially the center of the plate thickness.
[0041]
Further, as shown in FIG. 10, a sealing material 82 having high heat resistance may be provided between the heat welding portion 78 and the cutting blade 46 so as to fill a gap therebetween. By providing the sealing material 82 in this manner, it is possible to prevent the end portion of the hollow resin plate 2 from entering the gap between the two when the hollow resin plate 2 is cut, thereby preventing burrs and the like. It is preferable to use a material having excellent heat resistance, such as solder, as the sealing material.
[0042]
Further, the heat welding portion 78 and the cutting blade 46 may be integrally formed. FIG. 11 shows an embodiment in which these are integrated. The integral blade 90 has a sharply pointed blade portion 92 as a cutting blade, and a flat sealing portion 94 provided as a heat-welded portion adjacent to the blade portion 92 and in close contact with the end of the hollow resin plate 2 for sealing. And The hollow resin plate 2 such as the case blank 10 may be manufactured by using such an integral blade 90.
[0043]
【The invention's effect】
According to the present invention, a heat welding portion is provided on the inside or both inside and outside of the cutting blade, and when the hollow resin plate material is punched into a predetermined shape, the liner plates are welded to each other by the heat welding portion and obtained by punching. Since the sealing portion is provided at the end of the hollow resin plate material to be used, accurate positioning of the hollow resin plate material is not required for the end processing as in the conventional case, and it is necessary to perform the end processing individually for each end. Since there is no need, a great deal of labor and labor can be greatly reduced, and a significant cost reduction can be achieved. Also, since the seal is formed at the same time as the cutting, the shape collapses during welding as in the past, and it is not necessary to adjust the shape later. An edge treatment can be applied.
[Brief description of the drawings]
FIG. 1 is a plan view showing one embodiment of a case blank manufactured by a manufacturing method according to the present invention.
FIG. 2 is a partially enlarged cross-sectional view showing one embodiment of an end portion of a case blank manufactured by the manufacturing method according to the present invention.
FIG. 3 is an external view showing an embodiment of an end processing apparatus for a hollow resin plate material according to the present invention.
FIG. 4 is an explanatory diagram illustrating a cutting section of the device shown in FIG.
FIG. 5 is a plan view showing an arrangement state of a cutting blade, a heat welding portion, and an elastic body.
FIG. 6 is a plan view showing an arrangement state of a frame.
FIG. 7 is a perspective view showing an embodiment when a box is manufactured using a case blank manufactured by the manufacturing method according to the present invention.
FIG. 8 is a perspective view showing one embodiment of a box manufactured by the manufacturing method according to the present invention.
FIG. 9 is an enlarged cross-sectional view showing another embodiment of the seal portion provided on the hollow resin plate material according to the present invention.
FIG. 10 is a cross-sectional view showing another embodiment of the cutting portion of the manufacturing apparatus according to the present invention.
FIG. 11 is a cross-sectional view showing an embodiment when the cutting blade and the welding heating unit are integrated.
FIG. 12 is a partial cross-sectional perspective view showing one embodiment of a hollow resin plate material according to the present invention.
[Explanation of symbols]
2 Hollow resin plate material 4 Liner plate 6 Rib 10 Case blank 12a, 12b Side plate portion 14a, 14b Upper surface flap 16a, 16b Lower surface flap 18 Joint margin portions 20, 22, 24, 26 Bent portions 28, 30, 32, 34 , Seal portion 36 cut portion 42 upper die 44 lower die 46 cutting blade 56 frame body 60 heat insulating material 78 heat welding portion 80 elastic body 82 sealing material 90 integral blade

Claims (8)

In a method of punching a hollow resin plate material having a large number of ribs between a pair of parallel liner plates into a predetermined shape by a cutting blade,
Heat welding portions are provided on the inside or both inside and outside of the cutting blade, and at the time of the punching, the liner plates are welded to each other by the heat welding portion at the same time, at the end of the hollow resin plate material obtained by the punching. A method for treating an end of a hollow resin plate material, comprising providing a seal portion. Elastic bodies are provided on both sides of the cutting blade and the heat welding part or on both sides of the pair of heat welding parts, respectively, and when the welding and punching are performed, the hollow resin plate material is pressed by these elastic bodies. The method for treating an end portion of a hollow resin plate material according to claim 1, wherein: Another heat welding portion facing the heat welding portion is provided, the hollow resin plate material is sandwiched between these heat welding portions, and the seal portion is provided by heating from both upper and lower surfaces. Item 3. The method for treating an end portion of a hollow resin plate material according to item 1 or 2. The another heat welding portion is configured by a frame made of a high heat conductive material provided along a cutting line of the cutting blade, and heats the hollow resin plate material by heat provided from a heater. 4. The method for treating an end portion of a hollow resin plate material according to claim 3, wherein A cutting blade for punching a hollow resin plate material having a large number of ribs between a pair of parallel liner plates into a predetermined shape, and a heating welding portion disposed on the inside or both inside and outside of the cutting blade. ,
The heat welding portion is characterized in that at the time of the punching, the liner plates are welded to each other, and a seal portion is provided at an end portion of the hollow resin plate material obtained by the punching, wherein an end portion of the hollow resin plate material is provided. Processing equipment. An elastic body is provided on both sides of the cutting blade and the heat welding portion or on both sides of the pair of heat welding portions, and presses the hollow resin plate at the time of the welding / punching. An apparatus for treating an end of a hollow resin plate material according to claim 5. 7. A heat welding part provided opposite to the heat welding part and provided with the seal part by sandwiching the hollow resin plate between the heat welding part and the heat welding part. An end processing apparatus for a hollow resin plate material according to item 1. The another heat welding portion is configured by a frame made of a high heat conductive material provided along a cutting line of the cutting blade, and heats the hollow resin plate material by heat provided from a heater. The end processing apparatus for a hollow resin plate material according to claim 7, wherein

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