摘要:
The invention relates to a welding device (1) for producing tubular bodies by the edge-side welding of two substrate edges (2, 3), in particular two laminate edges, said welding device having a continuous, circulating first contact belt (5) for coming into contact with the substrate (4), and an energy source (12, 13) for providing welding energy. According to the invention, the first contact belt (5) has a seamless polyimide contact surface (35) for coming into contact with the substrate (4).
摘要:
An apparatus for detecting the position of application of a sealing strip of heat-seal plastic material onto a multilayer web of packaging material for food products advanced along a predetermined path and including at least one base layer for stiffness and strength and one or more heat-seal plastic layers; the sealing strip has a first longitudinal portion, applied onto a longitudinal edge of the web, and a second longitudinal portion projecting laterally from the longitudinal edge. The apparatus comprises a light source for irradiating a transversal portion of the web during movement thereof along its path, and a sensor detecting a quantity related to different behavior of the materials forming the web and the sealing strip to light exposure and generating an output signal related to the width of the second portion of the sealing strip in a direction orthogonal to the web travelling direction and parallel to said web.
摘要:
A method having the following steps: feeding a plastic material in the area of an inner surface of the mold, conforming the material to the inner surface of the mold, feeding a tubular film into the mold so that the material is positioned between an outer surface of the tubular film and the mold, expanding the tubular film using pressure and/or a vacuum, applying a pressure above atmospheric pressure and/or heating the mold so that the material is partly or completely melted and is adapted to conform to an inner contour of the mold and an outer contour of the expanded tubular film. The tubular film is shaped before it is fed into the mold. The invention further relates to a tubular film (1) and a method for manufacturing the same.
摘要:
A method of producing a seal comprising forming an elongated strip of a thermoplastic material having laterally spaced, interlockable portions; bending such strip along a longitudinal line disposed between the spaced interlockable portions to position the interlockable portions in opposed relation; and interlocking the interlockable portions together when such portions are disposed in opposed relation to provide a bulb segment and a mount segment.
摘要:
A method of producing a seal. The method can include forming an elongated strip of a thermoplastic material having laterally spaced, interlockable portions; bending such strip along a longitudinal line disposed between the spaced interlockable portions to position the interlockable portions in opposed relation; and interlocking the interlockable portions together when such portions are disposed in opposed relation to provide a bulb segment and a mount segment.
摘要:
An embodiment of the invention provides an improvement to the seaming process used in forming sleeves of TDO shrink film, which provides the benefit of reducing the incidence of open or weak seams in the TDO shrink film sleeve. Another embodiment of this invention provides a device used to improve the seaming equipment. Another embodiment of this invention provides an improvement in consistency of the seam lip quality.
摘要:
The embodiments of the invention relate to a method for creating a force for a welding jaw of a vertical tubular bag machine. The welding jaw is moved back and forth along a path to strike a second welding jaw moving in the opposite direction. A tubular film is compressed between the second jaw and at least one sealing surface of the welding jaws, to weld the tubular film by ultrasonic vibrations applied thereto via the sealing surface at an applied pressure under a sealing force (Fs) within a sealing time (ts). The sealing force (Fs) is predetermined by a control unit such that the sealing force (Fs) runs along a sealing force curve within the sealing time (ts). The sealing force curve has a first relative sealing force maximum (Fs1) and at least one second relative sealing force maximum (Fs2), wherein (Fs1) is lower than (Fs2).
摘要:
Apparatus for manufacturing a tubular product comprising a tube forming means, a tube maintaining means, a drawing means and energy application means, in which the tube forming means comprises a formation aperture or series of apertures adapted to form a subject material drawn therethrough into a tubular shape, in which the tube maintaining means comprises a circular aperture or series of apertures adapted to maintain the subject material drawn therethrough in the tubular shape, in which the drawing means is adapted to draw the subject material through the tube forming means and the tube maintaining means, in which the energy application means is adapted to direct an energy to the subject material, or an energy absorbent component disposed thereon, such that the subject material is set in the tubular shape, and in which the tube maintaining means is adapted to maintain the subject material in the tubular shape during absorption of the energy.
摘要:
A slat or vane for use in a covering for an architectural opening is suitable for use in either a horizontal or vertical orientation and in a horizontal orientation will not sag or droop, and in a vertical orientation will rotate uniformly along its length when rotated from end thereof. The slat is formed in a tubular configuration and has a base material of glass fibers bonded together in a thermoformable resin so as to maintain the arcuate curvature desired for the tubular slat or vane. The slat can be repeatedly deformed and will always return to its original configuration.
摘要:
The invention relates to a method for generating a welding force and/or a welding pressure for a welding jaw, in particular a welding jaw of a cross-sealing station of a vertical tubular bag machine, in which the sealing force or a sealing parameter, which correlates with the sealing force, in particular the sealing pressure or the drive power of the drive, is predetermined by a control unit during the sealing time, such that the sealing force runs along a sealing force curve within the sealing time, such that the sealing force curve has a first relative sealing force maximum with a sealing force and at least one second relative sealing force maximum with a sealing force, such that the sealing force at the first sealing force maximum is higher than the sealing force at the second sealing force maximum.