Manufacturing method of pressure container comprising in-mold label and three-dimensional shape

A method of manufacturing a pressure container comprising an in-mold label and a three-dimensional (3D) portion, the method comprising:

• heating molds formed with a 3D groove, the 3D groove having a first shape corresponding to the 3D portion to be formed on a surface of the pressure container;
• separating the molds;
• attaching a label including a printing layer to internal surfaces of the molds to allow at least a portion of the label to cover the 3D groove, the printing layer having a second shape corresponding to the 3D portion, wherein the attaching the label includes aligning the printing layer with the 3D groove to match the first and second shapes;
• positioning a pre-form of the pressure container in a cavity of the molds;
• closing the molds and expanding the pre-form to be attached to the label by injecting air into the pre-form at a pressure in a specific range by using an air injection apparatus installed outside the molds;
• three-dimensionally deforming the printing layer of the label and a portion of the expanded pre-form attached to the printing layer to correspond to the 3D groove of the molds using the pressure of the infected air;
• injecting cooling air into the pressure container formed by the expanded pre-form, while the molds are being heated;
• and
• separating the molds and detaching the pressure container with the 3D portion and the printing layer of the label deformed to correspond to the 3D portion from the molds,
• wherein the expanding the ore-form including:
• infecting air at a first pressure into the pre-form to initially expand the pre-form;
• and
• injecting air at a second pressure greater than the first pressure into the pre-from to further expand the pre-form after the label is attached to the expanded ore-form, and
• wherein the pre-form includes an inlet through which external air is injected therein, the inlet facing bottoms of the molds.

A method of manufacturing a PET container comprising an in-mold label and a three-dimensional (3D) portion, the method comprising:

• heating molds formed with a 3D groove, the 3D groove having a first shape corresponding to the 3D portion to be formed on a surface of the PET container;
• separating the molds;
• attaching a label including a printing layer to internal surfaces of the molds to allow at least a portion of the label to cover the 3D groove, the printing layer having a second shape corresponding to the 3D portion, wherein the attaching the label includes aligning the printing layer with the 3D groove to match the first and second shapes;
• positioning a PET pre-form of the PET container in a cavity of the molds;
• closing the molds and expanding the PET pre-form to be attached to the label by injecting air into the PET pre-form at a pressure in a specific range while inserting a pipe of an air supplying apparatus positioned outside the molds into the PET pre-form;
• three-dimensionally deforming the printing layer of the label and a portion of the expanded PET pre-form attached to the printing layer to correspond to the 3D groove of the molds using the pressure of the injected air;
• injecting cooling air into the PET pre-form that is expanded and deformed to be the PET container, while the molds are being heated;
• and
• separating the molds and detaching the PET container with the 3D portion and the printing layer of the label deformed to correspond to the 3D portion from the molds,
• wherein the expanding the PET pre-form including:
• injecting air at a first pressure into the PET pre-form to initially expand the PET pre-form;
• and
• injecting air at a second pressure greater than the first pressure into the PET pre-form to further expand the PET pre-form after the label is attached to the expanded PET pre-form, and
• wherein the PET pre-form includes an inlet through which external air is injected therein, the inlet facing bottoms of the molds.