Glass panel unit manufacturing method, building component manufacturing method, glass panel unit manufacturing system, and glass panel unit
A glass panel unit manufacturing method includes a bonding step, a pressure reducing step, and a sealing step. The bonding step includes bonding together a first substrate and a second substrate with a first sealant to create an inner space. The pressure reducing step includes producing a reduced pressure in the inner space through an exhaust port that the first substrate has. The sealing step includes melting a second sealant inserted into the exhaust port by locally heating the second sealant, and deforming the second sealant by pressing the second sealant toward the second substrate, to seal the exhaust port up with the second sealant melted and deformed.
1. A glass panel unit manufacturing method comprising
an arrangement step of stacking a first substrate, including a glass pane, and a second substrate, including a glass pane, one upon the other with a first sealant in a frame shape interposed between the first substrate and the second substrate;
a bonding step of bonding together the first substrate and the second substrate with the first sealant to create an inner space surrounded with the first sealant between the first substrate and the second substrate;
a pressure reducing step of producing a reduced pressure in the inner space through an exhaust port that the first substrate has; and
a sealing step of sealing the exhaust port up while maintaining the reduced pressure in the inner space,
the sealing step including melting a solid second sealant inserted into the exhaust port by locally heating the second sealant, with the second sealant kept in direct contact with the second substrate, and deforming the second sealant by pressing the second sealant toward the second substrate, to seal the exhaust port up with the second sealant that has expanded in the inner space to bond the second sealant onto both of the first substrate and the second substrate.
2. The glass panel unit manufacturing method of claim 1 , wherein the sealing step includes pressing the second sealant toward the second substrate with a press member inserted into the exhaust port.
3. The glass panel unit manufacturing method of claim 1 , wherein the sealing step includes locally heating the second sealant by irradiating the second sealant with an infrared ray.
4. The glass panel unit manufacturing method of claim 1 , wherein the sealing step includes pressing the second sealant toward the second substrate with an electrically conductive press member inserted into the exhaust port and locally heating the second sealant with the press member being inductively heated.
5. The glass panel unit manufacturing method of claim 1 , wherein
the sealing step includes arranging a getter between the second sealant and the second substrate, the getter being used to adsorb a gas, and
pressing the second sealant and the getter toward the second substrate with a press member inserted into the exhaust port.
6. The glass panel unit manufacturing method of claim 5 , wherein
the getter has electrical conductivity, and
the sealing step includes locally heating the second sealant with the getter being inductively heated.
7. A glass panel unit manufacturing method comprising a second bonding step of bonding a third panel including a glass pane, via a third sealant in a frame shape, onto either a glass panel unit manufactured by the glass panel unit manufacturing method of claim 1 or a cut piece of the glass panel unit.
8. A building component manufacturing method comprising an assembling step of fitting a building component frame into either a glass panel unit manufactured by the glass panel unit manufacturing method of claim 1 or a cut piece of the glass panel unit.