JP2018203593A - Molding bag for glass laminate - Google Patents

Abstract

To provide a molding bag for glass laminate which is improved that opening and closing operations of an aperture can be done quickly compared to prior art without deteriorating good airtightness when closed.SOLUTION: In a molding bag for glass laminate having a pair of bag bodies 2 and 3, and an aperture K formed by an outer periphery parts 2a and 3a of the bodies 2 and 3 and capable of changing an opening state and a closing state, a seal part S consisting of a first seal material 10 attached to one outer periphery part 2a and a second seal material 11 attached to another outer periphery part 3a is arranged, the closing state of the aperture K is made by contact of both seal materials 10 and 11 and the opening state of the aperture K is made by canceling contact of both seal materials 10 and 11, at least one 10 of both seal materials 10 and 11 is made of a rubber magnet, and the first seal material 10 and the second seal material 11 are magnetically adhered at the closing state of the aperture K.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a laminated bag for laminated glass used for producing glass for building materials, windshields of automobiles, and the like.

  In the windshield of automobiles and window glass of high-rise buildings, laminated glass is used in which broken pieces do not scatter when broken. Laminated glass is a glass with a structure in which a glass film and a glass plate are provided with a heat-meltable polymer film such as polyvinyl butyral. It is.

  Laminated glass is produced by the following method. A strong and flexible bag that can reduce the internal pressure to near vacuum after providing a polymer film that bonds the glass plates between two glass plates, that is, a molded bag for laminated glass (Hereinafter simply referred to simply as a molded bag).

  Next, the molded bag is generally heat-treated in a hot atmosphere of 100 to 130 ° C. for 10 to 15 minutes, and during this time, the air in the molded bag is continuously sucked between the two glass plates. Deaeration is performed to remove a minute amount of air contained in the polymer film. In this way, the two glass plates are sandwiched between the bag walls by the pressure difference and heat generated inside and outside the molded bag and heated under pressure to produce a laminated glass.

  When the laminated glass is taken out of the molded bag after the heating, suction, and pressurizing steps of the unbonded glass plate placed in the molded bag, the next unbonded glass plate is formed into the molded bag. The same process as described above is performed, and the molded bag is used repeatedly. In order to advance the production process efficiently, it is important to smoothly and quickly perform decompression by vacuum, that is, evacuation, which occupies most of the work, and for this purpose, quick closing operation of the opening and reliable operation in the closed state are important. High adhesion (air tightness) is required.

As a conventional means for closing the molded bag, as disclosed in Patent Document 1, there is a means for providing a continuous airtight fastener at each opening edge of the bag.
Further, as disclosed in Patent Document 2, there is also a means using a seal member in which a ridge extending along the opening and a ridge that can be engaged with the ridge are distributed to a pair of bag bodies. is there.

JP 2003-321257 A JP 2006-182581 A

  The means using the airtight fastener disclosed in Patent Document 1 has a problem that it takes time and labor to open and close the molded bag because it requires a considerable amount of force to open and close because of its airtight structure.

  In the sealing member disclosed in Patent Document 2, since a series of protrusions and recesses are sequentially pushed in from the end and engaged, considerable work and time are required for the operation. In addition, there are problems such as the protrusions and recesses being slightly deformed in length due to the engaging operation while being handled strongly, and they do not match well, the engagement is easily disengaged, and foreign objects are easily caught. Yes, it was not an easy task.

  An object of the present invention is to provide a molded bag for laminated glass which has been improved by further earnest research so that opening and closing operations can be performed more quickly than before without impairing good airtightness when closed. is there.

The present invention includes a pair of bag main bodies 2 and 3 and an opening K that is formed by outer edge portions 2a and 3a of the bag main bodies 2 and 3 and can be switched between an open state and a closed state. In laminated glass molded bags,
There is provided a seal portion S composed of a first seal material 10 attached to one outer edge portion 2a and a second seal material 11 attached to the other outer edge portion 3a, and the closed state of the opening K is the both The contact between the sealing materials 10 and 11, and the open state of the opening K is due to the contact release between the sealing materials 10 and 11,
At least one of the sealing materials 10 and 11 is made of a rubber magnet, and the first sealing material 10 and the second sealing material 11 are magnetized when the opening K is closed. It is characterized by that.

In the second aspect of the present invention, in the molded bag for laminated glass according to the present invention,
The first sealing material 10 and the second sealing material 11 are both made of rubber magnets R.

The third aspect of the present invention is a laminated bag for laminated glass according to the second aspect of the present invention,
One of the first sealing material 10 and the second sealing material 11 is magnetized in the N pole and the other is magnetized in the S pole.

4th this invention is the shaping | molding bag for laminated glasses by 1st-3rd this invention,
The rubber magnet R is characterized in that ferrite powder is mixed with rubber.

5th this invention is the shaping | molding bag for laminated glasses by 1st-4th this invention,
The seal portion S is provided on the first seal member 12 made of rubber attached to the bag body 2 inside the bag relative to the first seal material 10, and on the bag body 3 inside the bag relative to the second seal material 11. It has an inner seal portion S2 formed by a rubber second seal member 13 to be attached,
In the closed state of the opening K, the first seal member 12 and the second seal member 13 abut, and in the open state of the opening K, the first seal member 12 and the second seal member 13 Is configured to release contact.

According to the present invention, one of the first and second sealing materials provided at the outer edge of the bag body is made of a rubber magnet, and the closed state of the opening is concealed by the magnetic adhesion between the two sealing materials. . According to this configuration, when the first sealing material and the second sealing material are relatively moved closer to each other, the two sealing materials are magnetically attached to each other by magnetic force when approached to some extent.
In other words, in order to close the opening in the open state, it is only necessary to bring the first sealing material and the second sealing material close to each other, that is, one bag body and the other bag body, and a simple operation is sufficient. Become.
Moreover, since the first sealing material and the second sealing material are magnetized in the closed state, the closed state can be maintained and good sealing performance can be continued. In order to open the opening, the first sealing material and the second sealing material need only be peeled off, that is, the outer edge of the bag body may be separated.
As a result, it is possible to provide a molded bag for laminated glass which is improved so that the opening and closing operation can be performed more quickly than before without impairing the favorable airtightness in the closed state of the opening.

  According to the second aspect of the present invention, since both the first and second sealing materials are composed of rubber magnets, the magnetizing force is stronger than when only one is a rubber magnet, and better sealing performance is achieved. A molded bag can be provided.

  According to the third aspect of the present invention, since one seal material is magnetized at the N pole and the other seal material is magnetized at the S pole, there is no positional deviation when the two seal materials are overlapped, and the initial state is as it is. The first sealing material and the second sealing material can be overlapped at the relative position, and good sealing performance can be exhibited. For example, when general “single-sided multipole magnetization” in which N poles and S poles are alternately magnetized is performed, when the first sealing material and the second sealing material are superposed at regular relative positions, N and S poles overlap each other, and as a result, there is a disadvantage that N and S are slightly displaced so that they overlap each other. However, if “double-sided magnetization” is performed in which one is N and the other is S, There is an advantage that such inconvenience does not occur.

  According to the fourth aspect of the present invention, since ferrite powder is used as a magnetic material to be kneaded with rubber, it can withstand a heat treatment such as vulcanization while exhibiting a good magnetic force, and the magnetic force does not drop even at a high temperature. There is an effect that it is possible to provide a rubber magnet suitable for a molded bag that performs heating and pressurization.

  According to the invention of claim 5, since the inner seal portion by the first seal member and the second seal member arranged inside the bag of the first and second seal members is added, leakage is caused by the two seals inside and outside. There is an advantage that vacuuming can be performed more efficiently while realizing simple opening / closing operation of the molded bag.

Plan view of molded glass bag Plane showing the opened state of the molding bag of FIG. AA sectional view of FIG. 1 is a cross-sectional view taken along line B-B in FIG. 1, (a) in a closed state, (b) in an open state An enlarged plan view of the main part showing the structure near the suction nozzle

  Below, embodiment of the shaping | molding bag for laminated glasses by this invention is described referring to drawings as what is used for manufacture of the laminated glass for building materials.

  As shown in FIGS. 1 and 2, the molded bag (molded bag for laminated glass) 1 is formed by a pair of bag main bodies 2 and 3 and outer edge portions 2 a and 3 a of the bag main bodies 2 and 3 and is in an open state. And an opening K that can be switched to a closed state, and a seal portion S that can be switched between opening and closing of the opening K. The seal portion S includes an outer seal portion S1 formed on the outer edge of the bag and an inner seal portion S2 provided in the vicinity of the inner side of the outer seal portion S1.

  FIG. 1 shows the molded bag 1 in a closed state in which the opening K is closed. In this closed state, the seal portion S, that is, the seal state in which the outer seal portion S1 and the inner seal portion S2 are in close contact with each other. ing. FIG. 2 shows the molded bag 1 in an open state in which the opening K is opened. In this open state, the outer seal portion S1 and the inner seal portion S2 are both in an unsealed state in which the close contact is released. .

The bag bodies 2 and 3 are integrated only at the bottom, which is the long side of the base side of each other, and almost the entire region of the front side and the short sides of each bag body 2 and 3, that is, three sides Opened so that it can be opened and closed.
The forming bag 1 has a front end opening Ks which is a long side portion on the front end side, and one side and other side openings Ki and Kt which are open except for the end portion on the base side and which are both short side portions. That is, the molded bag 1 having a rectangular shape as a whole has an opening K (Ki, Ks, Kt) that can be opened and closed in three of the four directions.

  As shown in FIG. 1 to FIG. 3, the bag bodies 2 and 3 are made of an EPDM laminated fabric (ethylene propylene rubber laminated) having a front rubber layer and a back rubber layer laminated with ethylene propylene rubber on both sides of the polyester fiber cloth. Cloth). Each of the bag bodies 2 and 3 is configured by connecting and integrating the opening cloths 2B and 3B around the main body cloths 2A and 3A using the connecting cloths 2C and 3C. It is good. A film sheet 5 made of a fluororesin is pressure-bonded to at least the surface (main body cloth 2A, 3A) on the inner surface side of the bag main bodies 2 and 3. The material of the bag bodies 2 and 3 is preferably EPDM, but may be other than EPDM such as CR (chloroprene), fluorine rubber, and acrylic rubber.

  Inside the molded bag 1, twisted ropes 7 positioned in the front, rear, left and right directions are provided by a plurality of loop-shaped cloths 8 on the inner surface side of one bag body 2 which is the lower side when used as the molded bag 1. . The loop-shaped cloth 8 is attached to the bag body 2 by using a cover cloth 15 or the like. The torsion rope 7 and the gap between the twisted rope 7 and the air passage serve as air passages, so that vacuuming by decompression of the molded bag 1 using the suction nozzle 9 is performed smoothly. The connection cloths 2C and 3C, the loop cloth 8 and the cover cloth 15 are preferably made of the same material (EPDM laminated cloth 4) as the bag bodies 2 and 3, but may be made of other materials.

  As shown in FIGS. 1 to 3 and 5, the twisted rope 7 is formed by arranging one rope in a loop shape in the molded bag 1, and both rope ends 7 a and 7 b are sucked. The both ends of the proximal end pipe 6 of the nozzle 9 are locked by using an insulation lock 16 or the like. The suction nozzle 9 includes a nozzle main body portion 9A having a proximal end pipe 6 and a nozzle portion 9B that projects laterally from the nozzle main body portion 9A.

  As shown in FIGS. 2 and 3, the outer seal portion S <b> 1 includes a first seal member 10 attached to the outer edge portion 2 a of one bag body 2 on the lower side and the other bag body 3 on the upper side. And a second seal member 11 attached to the outer edge 3a. Both the first and second sealing materials 10 and 11 are made of a rubber magnet (also called magnetic rubber or bond magnet) R in which ferrite powder is kneaded and magnetized with NBR (nitrile rubber) and has a flat rectangular cross section. It forms in strip | belt shape and is attached to the inner surface of outer edge part 2a, 3a of the corresponding bag main bodies 2 and 3. The hardness of the NBR forming the sealing materials 10 and 11 is desirably 70 to 90 (Sure A), and is attached to the bag bodies 2 and 3 by an adhesive rubber layer 14 (by vulcanization adhesion) as an example.

  In the outer seal portion S1, the state in which the outer surfaces 10A and 11A of the respective sealing materials 10 and 11 are in close contact with each other is the closed state of the opening K, and the first outer surface 10A and the second outer surface 11A are separated from each other. Is configured to be in the open state of the opening K. The outer seal portion S1 has a configuration in which the first seal material 10 and the second seal material 11 are magnetically attached by a magnetic force, whereby the first and second outer surfaces 10A and 11A are in close contact with each other. Thus, the closed state of the opening K can be maintained. One of the first sealing material 10 and the second sealing material 11 is magnetized to the N pole, and the other is magnetized to the S pole.

  As shown in FIGS. 2 and 3, the inner seal portion S <b> 2 includes a first seal member 12 attached to one bag body 2 in the vicinity of the inside of the first seal material 10, and an inner side of the second seal material 11. A second seal member 13 attached to the other bag body 3 is provided in the vicinity. The first and second seal members are both made of rubber (synthetic rubber), more specifically, made of EPDM and formed in a strip shape having a flat rectangular cross section, and immediately inside the corresponding seal materials 10 and 11 (5 mm). It is attached to the bag bodies 2 and 3 at a certain distance. The hardness of EPDM forming the seal members 12 and 13 is preferably 40 to 60 (Sure A), and is attached to the bag bodies 2 and 3 by an adhesive rubber layer 17 (by vulcanization adhesion) as an example.

  In the inner seal portion S2, the state in which the upper surfaces 12A and 13A of the seal members 12 and 13 are in close contact with each other is the closed state of the opening K, and the first upper surface 12A and the second upper surface 13A are separated from each other. Is configured to be in the open state of the opening K. The first and second seal members 12 and 13 are set to be softer than the first and second seal members 10 and 11, so that the upper surfaces 12A and 13A are simply brought into contact with each other without any gaps. It is configured such that a small amount of surface contact is obtained and a good sealing state is obtained. The first and second sealing materials 10 and 11 are configured so that when the inside of the molding bag 1 is depressurized to some extent, the first and second sealing materials 10 and 11 are firmly adhered to each other without a gap, and the closed state of the opening K can be satisfactorily maintained only by the inner seal portion S2. Has been.

  As shown in FIGS. 4A and 4B, the first and second sealing materials 10 and 11 are connected to the bag main bodies 2 and 3, that is, at the bottom which is the long side of each base. It is integrated over a certain width. That is, the adhesive rubber layer 14 (by vulcanization adhesion) is configured to have a first base end portion 10B and a second base end portion 11B that are integrated with each other. Therefore, when the molding bag 1 is opened widely, as shown in FIG. 4B, the end of the first and second base end portions 10B and 11B (end on the front end opening Ks side) is used as a virtual fulcrum. The main bodies 2 and 3 are opened and swung.

  Next, the point of the heating and pressurization by the molding bag 1 is demonstrated. When the laminated glass G (see FIG. 1) is put into the opened molding bag 1 shown in FIG. 2, the upper bag body 3 is held and the lower bag body 2 is covered. In this covering operation, the second seal member 11 is changed to the first seal member 10 and the second seal member 13 is changed to the first seal member 12 in each of the front end opening Ks, the one side and the other side openings Ki, Kt. It is an operation that covers each position. In short, the upper bag body 3 may simply be placed over the lower bag body 2 so that the outlines of the bag bodies 2 and 3 match in the vertical direction.

  After the bag bodies 2 and 3 are put together and all the openings Ki, Ks, Kt are closed, and the molded bag 1 is sealed, the air in the molded bag 1 is extracted from the suction nozzle 9 by a pump (not shown) to reduce the pressure. A vacuuming process is performed. At the start of this evacuation step, the inside and outside of the bag are well sealed by the outer seal portion S1 in which the first outer surface 10A and the second outer surface 11A are in close contact with each other by magnetic force, and air from the outside is removed. It is depressurized quickly without inhaling.

  When the air is extracted to some extent and the air pressure in the bag is lowered, the contact force between the first upper surface 12A and the second upper surface 13A is increased, and the function of the inner seal portion S2 is brought into a completely sealed state. Is started. That is, the inner seal portion S2 is set so as to exhibit excellent sealing performance by an adhesion force stronger than that of the outer seal portion S1. Therefore, at the time of the action as the molded bag 1 when the inside of the bag is depressurized close to vacuum (at the time of heating and pressurizing), a sufficient sealing performance is substantially exhibited only by the inner seal portion S2, and the outer seal portion. It can be said that S1 has a function as a preliminary seal until the inner seal portion S2 performs a full-scale seal function.

  While the molding bag 1 is evacuated for a predetermined time, the molding bag 1 is heated to a predetermined high temperature by heating means (not shown) such as a heater. Accordingly, the laminated glass G (see FIG. 1) placed in the bag is pressed and heated strongly between the bag bodies 2 and 3 by the bag bodies 2 and 3, and a pair of glasses. The polymer film existing between them is also deaerated, and the laminated glass G is firmly integrated.

  As described above, in the molded bag 1 according to the present invention, the outer and inner surfaces 10A and 11A and the upper surfaces 12A and 13A are the same between the outer surfaces 10A and 11A, which are both flat surfaces. It is comprised by contact | abutting. Therefore, in order to close the molded bag 1, the upper bag body 3 may be placed on the lower bag body 2 so that the outlines of the molded bags 1 overlap with each other, and a simple and effortless closing operation is realized. ing.

  The seal portion S is required to have a good sealability at the start of evacuation and an excellent sealability that can withstand negative pressure due to reduced pressure. Since the outer seal portion S1 is adhered by magnetic adhesion simply by overlapping the first and second seal materials 10, 11 which are rubber magnets R, sufficient airtightness can be achieved even when the bag is not depressurized such as atmospheric pressure. The state is maintained, and evacuation is performed quickly without causing initial leakage at the start of pressure reduction. When the pressure is reduced to some extent, the first sealing material 10 and the second sealing material 11 are more firmly adhered to each other by the negative pressure, and the outer seal portion S1 can exhibit excellent sealing performance. Therefore, it is possible to exhibit sufficient sealing performance even with the seal portion S having only the outer seal portion S1.

  In the seal part of the outer edge of the bag in the conventional molded bag, the adhesion is not perfect, it takes a lot of time for vacuuming, and many clips are often used together to improve the adhesion. Productivity was not good. The molded bag according to the present invention has an effect of improving the adhesion of the seal portion without using a clip and performing the vacuuming operation efficiently and easily.

  In the molded bag 1 according to the first embodiment, since the inner seal portion S2 having smaller rubber hardness and better adhesion than the outer seal portion S1 is provided, the leakage is almost completely eliminated. While realizing a simple opening and closing operation, evacuation can be performed more efficiently.

[Another embodiment]
The molded bag 1 having the seal part S only by the outer seal part S1 may be used. In this case, it is better to use the sealing materials 10 and 11 using rubber (soft) whose hardness is slightly smaller than that of the outer seal portion S1 according to the first embodiment.

  The outer seal part S1 (seal part S) has one of the sealing materials 10 made of a rubber magnet R and the other sealing material 11 made of iron powder or nickel powder kneaded with rubber or has flexibility. The metal plate may be made of a material that does not have a magnetic force but can be magnetized.

DESCRIPTION OF SYMBOLS 2 One bag main body 2a Outer edge part 3 Other bag main body 3a Outer edge part 10 1st sealing material 11 2nd sealing material 12 1st sealing member 13 2nd sealing member K Opening part R Rubber magnet S Sealing part S2 Inner sealing part

Claims (5)

A laminated bag for laminated glass comprising a pair of bag bodies and an opening formed by outer edges of the bag bodies and switchable between an open state and a closed state,
There is provided a seal portion including a first seal material attached to one of the outer edge portions and a second seal material attached to the other outer edge portion, and the closed state of the opening portion is in contact with the two seal materials. And the open state of the opening is due to the contact release of the sealing materials,
A molded bag for laminated glass in which at least one of the sealing materials is a rubber magnet, and the first sealing material and the second sealing material are magnetically attached in the closed state of the opening.   The molded bag for laminated glass according to claim 1, wherein both the first sealing material and the second sealing material are made of rubber magnets.   The molded bag for laminated glass according to claim 2, wherein either one of the first sealing material and the second sealing material is magnetized in the N pole and the other is magnetized in the S pole.   The molded bag for laminated glass according to any one of claims 1 to 3, wherein the rubber magnet is formed by mixing ferrite powder with rubber. The seal portion is a first seal member made of a synthetic resin attached to the bag body inside the bag than the first seal material, and a rubber made of rubber attached to the bag body inside the bag than the second seal material. An inner seal portion formed by the second seal member;
The first seal member and the second seal member are in contact with each other when the opening is closed, and the first seal member and the second seal member are released from contact with each other when the opening is open. The molded bag for laminated glass according to any one of claims 1 to 4.

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