METHOD AND DEVICE FOR MOLDING OF UNCOVERING APPLIANCE ON PACKING SHEET

• Main Authors: RENDINA ANTONIO, GUSTAFSSON PER
• Format: Patent
• Language: English
• Published: 10.01.2003
• Edition: 7
• Subjects: ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; CONVEYING; HANDLING THIN OR FILAMENTARY MATERIAL; PACKAGES; PACKAGING ELEMENTS; PACKING; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; STORING; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

FIELD: method and device for injection molding of uncovering appliance of plastic on a hole formed on a sheet of packing material. SUBSTANCE: the device has at least one first and one second moulds, duct for injection of heated thermoplastic material to the molding cavity formed in the closed position of the moulds, and a drive mechanism for selective motion of the moulds between the open and closed positions. The moulds are installed for taking the closed position, in which they are engageable with the sheet sides, and for taking the open position in which they are positioned at a distance from the sheet sides. The injection duct continues at least into one of the moulds so that the thermoplastic material is injected directly into the molding cavity in the place that is removed from the edge of the hole located in the molding cavity. At least one of the moulds has a pair of mould halves, each of them being made for motion between the open and closed positions in the direction including the component that is parallel with the sheet plane, and the component perpendicular to the sheet plane. Described also is the method for molding of the uncovering appliance, the uncovering appliance and the package for poured out food products. EFFECT: enhanced efficiency of molding of configured uncovering appliances. 15 cl, 8 dwg