JPH0541004Y2 - - Google Patents

Description

[Detailed explanation of the idea]

[Industrial Field of Application] The present invention relates to a sealing device for a tape with an articulating tool, which is equipped with a seal bar that thermally welds the tape with an articulating tool to a base film in a polymerized state. [Prior art] Bags (chuck bags) that can be opened and closed by providing a male and female belt-shaped interlocking device (fitting part) after opening the bag are used in many fields such as food, medical products, and miscellaneous goods. has been done. As a method for manufacturing this bag with an interlocking tool, there is a method in which a band-shaped tape with an interlocking tool is manufactured in advance and this tape is thermally welded to a base film forming the bag body. A sealing device for a tape with an articulating tool is used to thermally weld the tape with an articulating tool to a base film. A conventional articulating tape sealing device is shown in FIG. In FIG. 4, the tape with male type articulating tool 1 and the tape with female type articulating tool 2 are such that the articulating tools 1A, 2A at the tip end are fitted into each other, and base film 3 is attached to the tape parts 1B, 2B at the base, respectively. is polymerized. These base films 3
Two seal bars 50 are arranged facing each other. These seal bars 50 are attached to the base film 3
It has a recess 50A extending in the longitudinal direction on the opposite surface thereof, and a contact portion 50B on both sides of this recess 50A and seal receivers 51 arranged on both sides of the tapes 1 and 2 with both articulating tools The tape portions 1B, 2B of the attached tapes 1, 2 and the base film 3 are sandwiched and thermally welded. Here, in the conventional example shown in FIG. 4, the two upper and lower seal bars 5
0 and the seal receiver 51 constitute a tape sealing device with an articulating tool. [Problem that the invention attempts to solve] However, in the conventional example mentioned above,
In order to thermally weld the tapes 1 and 2 with articulating tools at room temperature and the base film 3 at the same time using the seal bar 50, if the tapes 1 and 2 are made of a resin with a high sealing temperature such as polypropylene, the seal bar 50 is used. 50, the heating temperature must be set high. Therefore, since the seal bar 50 is pressed against the base film 3 at room temperature at a high temperature of 155° C., there is a problem that the articulating tools 1A, 2A are thermally deformed.
Moreover, the temperature distribution of the seal bar 50 varies, such as high temperature near the heat source and low temperature far from the heat source, but the seal bar 50
If the heating temperature itself is high, there is a problem that the difference in the temperature distribution becomes large and the thermal welding becomes non-uniform. Further, in the conventional example, the recess 50 of the seal bar 50
The width of A is usually narrow, 3 to 4 mm, and the width of occlusal tools 1A and 2 is narrow.
A is brought close to the contact portion 50B, and when the tapes 1 and 2 with articulating tools and the base film 3 are sealed with the seal bar 50, the articulating tools 1A and 2A are deformed by heat. Furthermore, heat is accumulated in the recessed portion 50A during thermal welding, but there is also the problem that the articulating tools 1A, 2A are deformed by this accumulated heat. If the articulating tools 1A, 2A are thermally deformed, the bag cannot be opened or closed, causing the inconvenience that it no longer functions as a chuck bag. An object of the present invention is to provide a sealing device for a tape with an articulating tool that can be heat-welded to a base film without deforming even a tape with an articulating tool using a resin with a high sealing temperature. [Means for Solving the Problems] The sealing device for the tape with the articulating tool of the present invention heat-welds the tape with the articulating tool to the base film in a polymerized state, and also seals the tape on the surface facing the tape with the articulating tool and the base film. In a sealing device for a tape with an articulating tool, the sealing bar is divided along the longitudinal direction of the tape with an articulating tool into a preheating section and a heating section set at a higher temperature than the preheating section. The heating section is characterized by having a heat dissipation hole that communicates between the inside and outside of the recess. Here, a heat insulating layer may be formed between the preheating section and the heating section. Examples of this heat insulating layer include a gap formed between the preheating section and the heating section, or a heat insulating material interposed between the preheating section and the heating section. Further, the preheating section may have a heat dissipation hole that communicates between the inside and outside of the recess, and further, the sealing device for the tape with an articulating tool is located next to the heating section on the opposite side from the preheating section. The tape may be equipped with a cooling means for cooling the tape with an articulating tool and the base film heated by the heating section. [Function] In the present invention having such a configuration, first, the tape with an articulating tool and the base film, which are sent in the longitudinal direction in a superimposed state, are preheated in the preheating section of the seal bar, and then the preheated base film is heated. The material film, etc. is heated in the heating section. The heat accumulated in the recess of the heating part is released to the outside from the heat dissipation hole that communicates the inside and outside of the recess, so that little heat is applied to the articulator itself. Here, the heating part heats the preheated tape with the articulating tool, etc., so the temperature change of the tape with the articulating tool, etc. increases step by step, and the temperature of the heating part is raised to a high temperature like the set temperature of the conventional seal bar. It is possible to sufficiently heat weld the material without using it. In addition, if a heat radiation hole is formed in the preheating part that communicates the inside and outside of the recess, the heat accumulated in the recess of the preheating part will be released to the outside through the heat radiation hole, and the occlusal tool itself will be heated. is rarely added. Furthermore, if a heat insulating layer is formed between the preheating section and the heating section, high-temperature heat will not be transferred from the heating section to the preheating section, and the preheating section and the heating section can be maintained at a predetermined temperature. Furthermore, if a cooling means is provided next to the heating section to cool down the tape with the interlocking tool and the base film heated by the heating section, wrinkles, shrinkage, etc. that occur on the surface of the base film etc. due to heating can be suppressed. [Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. FIG. 1 shows a schematic configuration of an apparatus for manufacturing a bag with an interlocking device. In FIG. 1, a tape feed roll 10 is arranged on the right side. A polypropylene resin tape 1 with a male articulating tool and a tape 2 with a female articulating tool are wound around this tape feed roll 10 with the articulating tools 1A and 2A at the tips thereof fitted together (the 2 and 3), these tapes 1 and 2 are fed to a polymerization roll 12 via an idle roll 11. Also,
Film feed rolls 13 are arranged above and below the tape feed roll 10. These rolls 13
A single-layer or multi-layer synthetic resin base film 3 is wound around the base film 3, and this film 3 is fed to a polymerization roll 12 via an idle roll 14. The superposition roll 12 is adapted to feed the tape parts 1B and 2B of the tapes 1 and 2 with the base film 3 superimposed on them to the sealing device 15 for the tapes with the articulation tools. As shown in FIGS. 2 and 3, this sealing device 15 includes a pair of upper and lower seal bars 16 facing the base film 3, and is arranged on both sides of the articulating tools 1A and 2A of the articulating tool attached tapes 1 and 2. The seal bar 16 and the cooling bar 1 are provided with two rectangular bar-shaped seal receivers 17 and a pair of upper and lower cooling bars 18 as cooling means arranged on the left side of the seal bar 16 in the figure.
8 is configured to be close to and away from the seal receiver 17. The seal bar 16 is divided into a preheating section 19 set at a predetermined temperature along the longitudinal direction of the tapes 1 and 2, and a heating section 20 set at a temperature 20 to 40 degrees Celsius higher than the preheating section 19. ,
Each of them is heated by a heating means (not shown). This heating means is preferably an electric heat source, and has a structure in which, for example, the seal bar 16 has a sheathed heater or the like that can adjust the temperature. Further, the material of the seal bar 16 is not particularly limited, but metals such as iron and aluminum are preferable. These preheating part 19 and heating part 20 have a recess 16A having a width of 6 mm and extending in the longitudinal direction on the surface facing the base film 3, and the contact parts 16B on both sides of this recess 16A and the seal receiver 17 are connected to each other. The tape portions 1B and 2B of the tapes 1 and 2 with the articulating tools and the base film 3 are sandwiched and thermally welded. Further, the lengths of the preheating section 19 and the heating section 20 in the longitudinal direction (the lengths in the left-right direction in FIG. 2) are each equal to L.
Moreover, a gap S with a width of 1 mm is formed as a cross-sectional layer between them. The preheating section 19
The heating unit 20 has two heat dissipation holes 21 and 22 that communicate the inside and outside of the recess 16A, respectively. It is desirable that the areas of these heat dissipation holes 21 and 22 be increased within a range that does not impair the strength of the seal bar 16. The cooling bar 18 has a concave outer cross section similar to the seal bar 16, and has a longitudinal dimension L. Moreover, the cooling bar 18 is
It has a structure that allows cooling water to flow inside it. A sealing device and a content filling device are arranged on the left side of the sealing device 15 in FIG.
A bag is formed by sealing a predetermined position of the bag, and the bag is filled with contents such as food, medicine, miscellaneous goods, etc. In the manufacturing device of the bag with the articulating tool configured as above,
From the tape feeding roll 10 to the tape 1 with male type articulating tool
The female-type articulating tool attached tape 2 is fed out with the articulating tools 1A and 2A fitted together, while the base film 3 is fed out from the two film feeding rolls 13, respectively. These tapes 1, 2 and film 3 are sent to a polymerization roll 12. This polymerization roll 12 superposes the tape portions 1B, 2B of the tapes 1, 2 with the articulating tools and the base film 3, and also overlaps them intermittently by length L in the longitudinal direction of the tapes 1, 2 with the articulating tools. and send it to the sealing device 15 for the tape with an articulating tool. In this tape sealing device 15 with an articulating tool, a pair of upper and lower sealing bars 16 and a cooling bar 1 are provided.
8 are driven close to and away from the seal receiver 17, and the tapes 1 and 2 with the articulating tool and the base film 3 are first sent to the preheating section 19 and heated at a predetermined temperature, and then sent to the heating section 19. 20 and is heated by the preheating section 19 at a temperature of 20 to 40 degrees Celsius. At this time, the heat accumulated in the recess 16A of the seal bar 16 is released to the outside through the heat radiation holes 21 and 22.
The articulating tapes 1 and 2 and the base film 3 heated in the heating section 20 are sent to the cooling bar 18,
The surface is cooled. The tapes 1 and 2 with articulating tools and the base film 3 sealed by the tape sealing device 15 with articulating tools are
A bag is formed from the two base films 3 by being sent to a sealing device and a contents filling device (not shown), and contents such as food, medicine, miscellaneous goods, etc. are filled into the inside of this bag. According to this embodiment, the sealing bar 16 of the sealing device 15 for the tape with an articulating tool is attached to the preheating part 19 along the longitudinal direction of the tape with an articulating tool 1 and 2 at a temperature of 20 to 40°C from the preheating part 19. Since it is divided into a heating part 20 set at a high temperature, the tape with an articulating tool 1,
The temperature change increases step by step during thermal welding of the 2nd grade, and the temperature of the heating part 20 does not have to be as high as the set temperature of the conventional seal bar.
It is possible to prevent thermal deformation of A and 2A. Therefore, since the set temperature of the heating section 20 does not have to be high, uneven heating of the heating section 20 is reduced.
Thermal welding of tapes 1, 2, etc. with articulating tools can be uniformly performed. Moreover, the preheating section 19 and the heating section 20 are provided with a heat dissipation hole 2 that communicates between the inside and outside of the recess 16A.
1 and 22, the recess 16A of the heating section 20
The heat accumulated inside will be released to the outside from the heat radiation holes 21 and 22 that communicate the inside and outside of the recessed part 16A, and from this point as well, the articulating tools 1A and 2A are prevented from being thermally deformed. be able to. Also,
In this embodiment, a gap S is formed between the preheating section 19 and the heating section 20 as a heat insulating layer.
High temperature heat is not transferred from the heating section 20 to the preheating section 19 and the heating section 20 at a predetermined temperature. Furthermore, a cooling bar 18 is provided next to the heating section 20 on the opposite side from the preheating section 19 as a cooling means for cooling the tapes 1 and 2 with articulating tools and the base film 3 heated by the heating section 20. It is possible to suppress wrinkles, shrinkage, etc. that occur on the surface of the base film 3 etc. due to heating, and the appearance of the bag is not impaired. Furthermore, since the width of the concave part of the seal bar 16 is 6 mm, which is longer than the conventional 3 to 4 mm, the articulating tools 1A and 2A are located relatively far from the abutting part 16B, and the heat of the seal bar 16 is transferred to the articulating tool 1A. ,2
This makes it difficult for heat to be transmitted to A, thereby preventing thermal deformation of the articulating tools 1A and 2A. Next, an example will be described in order to confirm the effects of the above example. Example conditions: Tapes 1 and 2 with articulating tools were made of polypropylene and had a width of 12 mm (6 mm on each side). In addition,
The seal width was 2 mm. As the base film 3, a laminate film made of biaxially stretched nylon (ONP) with a thickness of 15 μm and unstretched polypropylene (OPP) with a thickness of 60 μm was used. The apparatus for manufacturing the bag with the interlocking device was manufactured by Seibu Kikai Co., Ltd., and the bag manufacturing speed was 40 shots/min. The temperature of the preheating section 19 is set to 110°C, and the length L in the longitudinal direction of the preheating section 19 and the heating section 20 is
It was set to 25mm. In addition, a preheating section 19 and a heating section 20
The ratio of the area of the heat radiation holes 21 and 22 to the area of the entire upper surface of the preheating part 19 and the heating part 20 is
It was set at 70%. The experimental results shown in Table 1 were obtained under the above conditions. In Table 1, the sealing property refers to the welding property between the articulating tapes 1 and 2 and the base film 3, and is rated as ○: good, ×: poor. In addition, the shape of the occlusal part refers to the occlusal tool 1A of the occlusal tool attached tapes 1 and 2,
2A refers to the degree of deformation, ○...no deformation, ×...deformation. Furthermore, the judgment refers to the overall evaluation, ○...Good, ×...Poor.

[Effect of idea]

According to the present invention as described above, there is an effect that even a tape with an interlocking device made of a resin having a high sealing temperature can be thermally welded to the base film without deformation.

[Brief explanation of the drawing]

Figure 1 is a schematic configuration diagram of a manufacturing device for a bag with an articulating tool;
FIG. 2 is a perspective view of an embodiment of the present invention, FIG. 3 is a sectional view taken along the line - in FIG. 2, and FIG. 4 is a perspective view of a conventional example. 1, 2... Tape with articulating tool, 1A, 2A... Articulating tool, 3... Base film, 15... Sealing device for tape with articulating tool, 16... Seal bar, 17...
... Seal receiver, 18 ... Cooling bar as cooling means, 19 ... Preheating section, 20 ... Heating section, 21, 2
2... Heat dissipation hole, S... heat insulation layer.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A tape with an articulating tool is thermally welded to a base film in a polymerized state, and a seal bar is provided with a recess formed on the surface facing the tape with an articulating tool and the base film. In the sealing device for a tape with an articulating tool, the seal bar is divided into a preheating part and a heating part set at a higher temperature than the preheating part along the longitudinal direction of the tape with an articulating tool, and this heating part is connected to the inside of the recess. A sealing device for a tape with an articulating tool, characterized by having a heat radiation hole communicating with the outside. (2) The sealing device for a tape with an articulating tool according to claim 1, characterized in that a heat insulating layer is formed between the preheating section and the heating section. (3) The sealing device for a tape with an articulating tool according to claim 1 or 2, wherein the preheating section has a heat dissipation hole that communicates between the inside and outside of the recess. (4) In any one of claims 1 to 3, a cooling means is provided adjacent to the heating section on the opposite side from the preheating section for cooling the tape with the articulating tool and the base film heated by the heating section. A sealing device for tape with an articulating tool.