TH30754B - Sealing unit for applying plastic foil to substrates. - Google Patents

Abstract

DC60 (08/06/54) This invention relates to a sealing unit (8) for applying a plastic foil (7) to a flat substrate material (1) by means of heat and pressure, by applying a sealing plate (11) to the active surface and a back plate (9) that is movable relative to the back plate, where the sealing unit (8) is bonded to the cutting unit of the mold (16), to the cutting knife of the mold (15), and to the opposite plate (21) for making subsequent cuts (6) at a chosen location in the flat substrate material (1) in the area of the plastic film used. To improve the sealing unit (8) according to previous scientific principles so that the cut edges of the mold are no longer frayed by the substrate or plastic, but are clean and free of protrusions, according to this invention. The sealing plate (11) of the sealing unit (8) has a convex area (14) and a recessed area (13) on the active surface of the sealing plate facing the back plate (9), and the position of the recessed area (13) in the sealing plate (11) corresponds to the position of the cutting knife of the mold (15) so that the cut (6) is performed at a position chosen in the substrate material (1), where, due to the recessed area (13) of the sealing plate (11), there is almost no heating of the substrate material (1) and lamination of the substrate material. This invention relates to a sealing unit (8) for the application of a plastic foil (7) to a flat substrate material (1) by means of heat and pressure applied to a sealing plate (11) against the active surface and a back plate (9) that is relative to the back plate, where the sealing unit (8) is bonded to a die-cutting unit (16) with a die-cutting knife (15) and an opposing plate (21) for making subsequent cuts (6) at selected locations in the flat substrate material (1) in the area of the plastic film used. To improve the previous sealing unit (8) so that the edges of the die would no longer be frayed by the substrate or plastic, but would be clean and free of protrusions, according to this invention, the sealing plate (11) of the sealing unit (8) will have convex (14) and concave (13) regions on the active surface of the sealing plate that is turned. The back plate (9) and the position of the indentation (13) in the sealing plate (11) are to correspond to the position of the die cutter (15) so that the cut (6) is performed at the position chosen in the substrate material (1), where, due to the indentation (13) of the sealing plate (11), there is almost no heating of the substrate material (1) and lamination of the substrate material.

Claims (10)

1. Sealing and cutting units for applying plastic foil to a flat substrate to form a laminate using heat and pressure; a sealing unit, a cutting unit of the mold, and a drive for moving the laminate from the sealing unit to the cutting unit; the sealing unit, which includes a sealing plate with a heated active surface and a back plate that moves relative to the cutting unit; the cutting unit, which includes a mold cutter with at least one cutting blade; and a backing plate for forming the mold section at a chosen location in the planar substrate in the area of the plastic foil used, where the sealing unit's sealing plate has at least one set of convex and concave surfaces facing the top of the back plate to form the heat-reducing area of the plastic foil or the concave area, and the drive for movement. The laminate material is prepared on the cutting unit of the mold so that the area of reduced heat corresponds to the location of the mold's cutting knife during cutting, ensuring that the cut is made only in the area of reduced heat. 2. The sealing unit and cutting unit as per claim 1, whereby the sealing unit and the cutting unit shall be comprised of a sealing unit welded to the cutting unit of the mold. 3. The sealing unit and cutting unit pursuant to claim paragraph 2 shall be positioned at the end of the sealing unit in the machine working direction of the substrate material at a predetermined distance from there, and the sealing unit and the mold unit shall be controlled in a coordinated manner so that the selected position in the substrate material in the sealing unit enters a position above the lowering area and subsequently enters a corresponding position under the mold cutting knife in the mold cutting unit. 4. The sealing unit and cutting unit pursuant to claim paragraph 3, where a certain number of indentations in the active surface of the sealing plate shall form a pattern which is an image of the cutting pattern of a certain number of die cuts of the die cutting unit so that the two patterns are aligned. 5. The sealing and cutting unit pursuant to claim paragraph 3, where planar substrate material is moved by a discontinuous drive path from the sealing unit into the cutting unit of the die. 6. The sealing unit and cutting unit under claim 2, where planar substrate material is moved by a discontinuous drive path from the sealing unit to the cutting unit of the die. 7. The sealing and cutting unit pursuant to claim paragraph 1, where the recessed area of the sealing plate is wider than the cutting blade of the cutting unit so that the heated area is de-heated around the body of the cutting unit on all sides. 8. The sealing and cutting unit pursuant to claim paragraph 1, where the sealing plate is formed from metal which is routed onto its active surface to form an indentation, and where the active surface is coated with a scratch-resistant plastic material. 9. The sealing and cutting unit pursuant to claim paragraph 1, which forms part of the forming assembly with an opening for the filling machine for packaging liquids and substrate materials, is a transport material sheet provided with one layer of multiple plastic layers with notches for the production of the packaging with a tear-off strip above the opening, and the shape for the cutting knife is circular. 10. Sealing and cutting units as per claim 1, where the upper part of the back plate is a flat section.