1. A pouch forming device (100) for forming an accommodation part (11b) accommodating an electrode assembly (12)in a pouch sheet (11), the pouch forming device (100) comprising: a lower die (110) which is disposed on a lower portion of the pouch sheet and in which a forming groove (111) is formed in an upper portion thereof; a punch unit(250) disposed above the pouch sheet (11) and comprising a punch pressing the pouch sheet in a direction of the forming groove (111) of the lower die (110) to form the accommodation part in the pouch sheet in a shape corresponding to the forming groove (111); a vacuum unit (130) connected to the forming groove (111) of the lower side to apply vacuum to the pouch sheet seated on a top surface of the lower die (110) so as to elongate the forming portion of the pouch sheet; a control unit adjusting pressing force for pressing the pouch sheet (11) through a stripper (221); and a punch moving part (252) allowing the punch (251) to vertically move, wherein the punch moving part (252) allows the punch (251) to descend so as to press the pouch sheet, wherein a vacuum passage (112, 113) serving as a passage connecting the forming groove (111) to the vacuum unit (130) is further formed in the lower die (110), wherein a suction hole (112a, 113a) of the vacuum passage (112, 113) connected to the forming groove (111) is provided in a lower portion of a side surface of the forming groove (111), wherein the suction hole (112a, 113a) of the vacuum passage (112, 113) is provided in plurality along the lower portion of the side surface of the forming groove (111), wherein, when the punch (251) is inserted into the forming groove (111) of the lower die (110) to press the pouch sheet, the control unit controls the stripper moving part (222) to allow the stripper (221) to ascend so that the stripper presses the pouch sheet, and wherein the control unit controls the punch moving part (252) and the stripper moving part (222) so that the stripper (221) gradually ascends, and simultaneously, the punch (251) gradually decreases in descending speed.

2. The pouch forming device (100) as claimed in claim 1, wherein the vacuum passage (112, 113) has a shape that gradually decreases in diameter toward the suction hole (112a, 113a).

3. The pouch forming device (100) as claimed in claim 1, wherein the vacuum unit (130) comprises a vacuum pump.

4. The pouch forming device (100) as claimed in claim 1, wherein an end of the punch is disposed at a position facing the forming groove (111) of the lower die (110), and the end of the punch is inserted into the forming groove (111) of the lower die (110) to press the pouch sheet (11) so as to form the accommodation part.

5. The pouch forming device (100) as claimed in claim 1, optionally comprising a stripper unit (220) comprising: a stripper (221) disposed above the pouch sheet (11) and pressing an outer portion of the accommodation part in the pouch sheet (11) to support the pouch sheet on the lower die (110); and a stripper moving part (222) allowing the stripper (221) to vertically move.

Description:same as enclosed , C , Claims:We claim;

1. A pouch forming device (100) for forming an accommodation part (11b) accommodating an electrode assembly (12)in a pouch sheet (11), the pouch forming device (100) comprising:
a lower die (110) which is disposed on a lower portion of the pouch sheet and in which a forming groove (111) is formed in an upper portion thereof;
a punch unit(250) disposed above the pouch sheet (11) and comprising a punch pressing the pouch sheet in a direction of the forming groove (111) of the lower die (110) to form the accommodation part in the pouch sheet in a shape corresponding to the forming groove (111);
a vacuum unit (130) connected to the forming groove (111) of the lower side to apply vacuum to the pouch sheet seated on a top surface of the lower die (110) so as to elongate the forming portion of the pouch sheet;
a control unit adjusting pressing force for pressing the pouch sheet (11) through a stripper (221); and
a punch moving part (252) allowing the punch (251) to vertically move, wherein the punch moving part (252) allows the punch (251) to descend so as to press the pouch sheet,
wherein a vacuum passage (112, 113) serving as a passage connecting the forming groove (111) to the vacuum unit (130) is further formed in the lower die (110),
wherein a suction hole (112a, 113a) of the vacuum passage (112, 113) connected to the forming groove (111) is provided in a lower portion of a side surface of the forming groove (111),
wherein the suction hole (112a, 113a) of the vacuum passage (112, 113) is provided in plurality along the lower portion of the side surface of the forming groove (111),
wherein, when the punch (251) is inserted into the forming groove (111) of the lower die (110) to press the pouch sheet, the control unit controls the stripper moving part (222) to allow the stripper (221) to ascend so that the stripper presses the pouch sheet, and
wherein the control unit controls the punch moving part (252) and the stripper moving part (222) so that the stripper (221) gradually ascends, and simultaneously, the punch (251) gradually decreases in descending speed.

2. The pouch forming device (100) as claimed in claim 1, wherein the vacuum passage (112, 113) has a shape that gradually decreases in diameter toward the suction hole (112a, 113a).

3. The pouch forming device (100) as claimed in claim 1, wherein the vacuum unit (130) comprises a vacuum pump.

4. The pouch forming device (100) as claimed in claim 1, wherein an end of the punch is disposed at a position facing the forming groove (111) of the lower die (110), and
the end of the punch is inserted into the forming groove (111) of the lower die (110) to press the pouch sheet (11) so as to form the accommodation part.

5. The pouch forming device (100) as claimed in claim 1, optionally comprising a stripper unit (220) comprising: a stripper (221) disposed above the pouch sheet (11) and pressing an outer portion of the accommodation part in the pouch sheet (11) to support the pouch sheet on the lower die (110); and a stripper moving part (222) allowing the stripper (221) to vertically move.