32 results about "Roll slitting" patented technology

A method for automatic sleeve filling of a winding shaft on roll cutting and winding machines is provided in which, in an exemplified embodiment, in a first step at least two empty winding sleeves are slid onto a free end of a winding shaft so that the winding sleeves are adjacent to one another, in a second step the last winding sleeve slid on by a freely positionable fork piece of a freely programmable draw-off plate along the winding shaft is slid over the winding shaft until the last winding sleeve has reached a predetermined position, in a third step the next-to-last winding sleeve slid on is grasped by tongs freely positionable along the winding shaft and is slid over the winding shaft to the point where in a fourth step the fork piece can dip into the gap produced by the tongs so that the next-to-last winding sleeve is positionable along the winding shaft by the fork piece.

The invention discloses a closed roller gap threading and rolling method for a double-rack cold-rolling mill. The control sequence of the threading process of the double-rack cold-rolling mill and the pressing-down sequence of a hydraulic pressing-down cylinder are adjusted, rolling and threading can be achieved under the closed roller gap predetermined value and belt pressure, strip steel deflection can be avoided by dynamically adjusting a pressing-down system, different roller bending force and tension are used for adjusting strip steel, and accordingly smooth closed roller gap threading and rolling of various specifications of products can be guaranteed; the lubricating and cooling effect of emulsified liquid is used for improving the rolling condition so as to lower rolling force. The method comprises the following steps that first, strip steel information is called-in or input, the production plan is made and then is sent to a computer, rolling parameters needed by rolling are obtained through a model in the computer, and the computer sends the rolling parameters to a process control VME system to be used as control parameters; second, strip steel threading is conducted, when a threading and rolling strip steel head reaches a coiling machine jaw, the length is preset, production begins according to the normal rolling sequence, and it is guaranteed that double-rack rolling stability can be achieved and the yield of the double-rack cold-rolling mill can be improved at the same time.

The invention discloses a production technology for a heat shrinkable polyester film and relates to the package material field. The production technology comprises the following technologies: slicing, vacuum drying, melt extrusion, quenching slice casting, biaxial tension, cooling and rolling slitting. Amorphous polyethylene glycol terephthalate is selected as a raw material, amorphous polyethylene glycol terephthalate is easy to recycle, nontoxic and odourless, has good mechanical properties, and meets environment protection requirements. Heat is transferred to materials to be dried through a drier shell under the vacuum environment, and therefore the purpose of drying reinforcement is achieved. The softening point of polymers is raised effectively, adhesion and agglomeration of resin particles are avoided during the drying and melt extrusion processes, moisture in resins can be removed, and hydrolytic degradation and bubble generation of polymers containing ester groups are prevented during the melt extrusion process. The ways of segmented heating and segmented processing are beneficial for fusion of molecules, and avoid material deterioration caused by too fast heating. the intensity of the produced shrinkable film is raised, and the shrinkable film has impact resistance.