Glass panel unit assembly, and method for manufacturing glass panel unit
An assembly includes a plurality of partitions to partition an internal space, surrounded with a pair of glass substrates arranged to face each other and a the peripheral wall having a frame shape and provided between the pair of glass substrates, into an evacuation space and a ventilation space. The plurality of partitions includes a first partition and a second partition, of which lengths are defined in two different directions. An end of the second partition faces a side portion of the first partition with a predetermined gap left between them. A space between the end of the second partition and the side portion of the first partition constitutes an air passage to evacuate the evacuation space through an evacuation port. The second partition includes, at the end thereof, a swollen portion protruding toward the evacuation space at least along the width of the second partition.
1. A glass panel unit assembly comprising:
a pair of glass substrates arranged to face each other;
a peripheral wall having a frame shape and disposed between the pair of glass substrates;
a partition arranged to partition an internal space, surrounded with the pair of glass substrates and the peripheral wall, into an evacuation space and a ventilation space;
an evacuation port connecting the ventilation space to an external environment; and
an air passage provided to evacuate the evacuation space through the evacuation port,
an end of the partition facing the peripheral wall with a predetermined gap left between the partition and the peripheral wall,
the air passage being a space between the end of the partition and the peripheral wall,
the partition including, at the end thereof, a swollen portion protruding toward the evacuation space at least along a width of the partition.
2. A glass panel unit assembly comprising:
a pair of glass substrates arranged to face each other;
a peripheral wall having a frame shape and disposed between the pair of glass substrates;
a plurality of partitions arranged to partition an internal space, surrounded with the pair of glass substrates and the peripheral wall, into an evacuation space and a ventilation space;
an evacuation port connecting the ventilation space to an external environment; and
an air passage provided to evacuate the evacuation space through the evacuation port,
the plurality of partitions including a first partition and a second partition, of which lengths are defined in two different directions,
a first end of the second partition facing a side portion of the first partition with a predetermined gap left between the first partition and the second partition,
the air passage being a space between the first end of the second partition and the side portion of the first partition,
the second partition including, at the first end thereof, a swollen portion protruding toward the evacuation space at least along a width of the second partition.
3. The glass panel unit assembly of claim 2 , wherein the second partition has a second end, and the swollen portion protrudes toward both the first end and the second end along the width of the second partition.
4. The glass panel unit assembly of claim 3 , wherein the swollen portion has a spherical shape.
5. The glass panel unit assembly of claim 3 , wherein the swollen portion includes parts obliquely protruding from the end of the second partition toward both the first end and the second end along the width of the second partition.
6. A method for manufacturing a glass panel unit, the method comprising an assembling step, an evacuation step, and a sealing step,
the assembling step including providing the glass panel unit assembly according to claim 1 ,
the evacuation step including evacuating the evacuation space through the air passage, the ventilation space, and the evacuation port,
the sealing step including deforming the plurality of partitions to close the air passage.
7. The method of claim 6 , wherein
the assembling step includes an application step of applying a material for the second partition,
the application step includes forming the swollen portion by making a velocity at which the material is applied along a shorter side of the second partition lower than a velocity at which the material is applied along longer sides of the second partition.
8. The method of claim 6 , wherein the sealing step includes deforming the plurality of partitions while evacuating the evacuation space through the air passage, the ventilation space, and the evacuation port.
9. The method of claim 6 , further comprising a removing step, wherein the removing step includes removing a part including the ventilation space to obtain a glass panel unit as a part including the evacuation space.