According to the present invention, means are provided for adhering and releasing a sheet of stretch wrap packaging material 30 to the holding member. According to one aspect of the invention, the means for adhering and releasing includes, as shown in Figs. 1a and 1b, an quickly managed compressor and vacuum pump motor 22, which happens to be linked to positioning fellow member 20 by hose 24 for supplying a vacuum by means of apertures 42 to stick the product packaging fabric 30 to retaining participant 20, as well as for preventing the effective use of a vacuum, or supplying a confident air flow via apertures 42 to release and blow the product packaging substance away from the holding member 20. Compressor and vacuum push 22 is managed by a controller 26 including a microprocessor or any other manage circuitry which gives timing functions in the method standard with stretch out wrapping equipment.
A stretch wrap dispenser is provided for dispensing a sheet of stretch wrap packaging material, according to the invention. As demonstrated in Figs. 1b and 1a, expand wrap dispenser 28 dispenses a page of extend wrap product packaging fabric 30 within a online form. Stretch out wrap dispenser 28 includes a install for a roll of stretch out wrap wrapping substance and could include rollers or some other products for stretching the extend wrap packing material longitudinally and/or transversely, as shown in U.S. Patent No. 5,161,349.
Means are provided for providing relative rotation between the dispenser and the load to wrap stretch wrap packaging material on the load, according to the present invention. As shown in Figs. 1a and 1b, the means for offering family member rotation involves an L-shaped left arm 32 for promoting dispenser 28 along with a motor driven showing 34 for driving a car the L-molded left arm 32 and dispenser 28 within a group of friends close to a load 36.
Means are provided for severing the packaging material between the load and the holding member while continuing to hold the stretch wrap packaging material with the holding member, according to the present invention. As shown in Figs. 1a and 1b, the method for severing incorporates a very hot wire 38 about the retaining member which functions to warmth and sever the film by warming when pulsed with electrical energy as instructed by controller 26. Very hot wire 38 is if possible recessed in the groove 44 running over the longitudinal time period of retaining fellow member 20. Information of an exemplary groove 44 for the popular wire 38 as well as the apertures 42 and thinner station is visible in Figs. 3a through three dimensional. Otherwise, the severing signifies can include a cutter placed on or aside from the positioning fellow member. The cutter may be fixed to or slidable on keeping associate.
Yet another embodiment from the present invention is demonstrated in Figs. 2b and 2a, by which similar numerals designate related components. As demonstrated in Fig. 2a, the method for offering comparable rotation between the dispenser 128 and the load 136 to wrap the stretch wrap wrapping substance about the weight incorporates a motor motivated turntable 133 fitted in base 135. Load 136 is rotated about a normally straight axis by turntable 133. Retaining associate 120 might be just like positioning fellow member 20 as detailed in respect to Fig. 1.
Keeping member 120, and also 20, can include a method for releasing and adhering, which includes an adhesive surface 121 on retaining member 120 which adheres stretch wrap wrapping fabric 130 to keeping participant 120. The adhesive surface could be a tacky surface and can include, for example, a cylinder covered with vinyl plastisol that has been created and machined as explained in United states Patent No. 5,186,981, which happens to be incorporated herein by guide. The option of tackiness depends on the application. Otherwise, the adhesive surface 121 of retaining member 120 might be a prickly or abnormal surface.
The path for releasing and adhering the stretch wrap packaging material from the holding participant 120 may include a motor driven actuator 146 that is connected to positioning fellow member 120. The actuator can rotate holding member 120 about its main vertical longitudinal axis in accordance with wrapping material 130 to alternately engage and launch packaging material 130 from keeping associate 120. Alternately, the actuator can slide holding participant 120 by language translation or pivoting to alternately participate and independent packing materials 130 from positioning fellow member 120. The positioning member 120 might be extended and retracted with a single movement and in one linear direction.
According to the present invention is shown in Fig a method for stretch wrapping a load. 1a. As shown, a load is conveyed by conveyor 48 to a wrapping station. By energizing vacuum pump 22 when stretch wrap packaging material 30 is proximate holding member 20, a leading end portion 30a of a sheet of stretch wrap packaging material is adhered to holding member 20. Otherwise, or together with this procedure of adhering, the stretch out wrap product packaging substance could be followed keeping participant 20 by utilization of a tacky surface 21 on positioning fellow member 20.
The page of expand wrap packaging fabric 30 is dispensed through the stretch out wrap dispenser 28 whilst offering general rotation between the dispenser 28 and the load 36 during the entire stretch out wrap packaging materials around the weight. As demonstrated in Fig. 1a, the comparable rotation is achieved by transferring dispenser 28 close to fill 36.
Following the extend wrap wrapping materials 30 is wrapped across the stress that it is protected towards the stress, as an example, by overwrapping, top rated end part 30a of the stretch out wrap packaging materials 30 is introduced through the keeping fellow member 20 by several of strategies such as the adhering to: quitting the vacuum through apertures 42 by stopping the vacuum from vacuum pump 22, blowing the extend wrap packaging material away from the keeping fellow member for example by reversing the vacuum and forcing pressurized air flow in the compressor and vacuum pump 22 by way of garden hose 24 and out apertures 42, or by turning or moving retaining participant 20 in accordance with stretch out wrap wrapping material 30 by utilizing motor-powered actuator 46. The general rotation persists until finally fill 36 is completely wrapped towards the specifications of your software. At the moment, a trailing end segment 30b in the expand wrap packaging substance is followed retaining fellow member 20 by actuating the vacuum by way of apertures 42 and/or contacting a tacky surface 21.
The packing materials between your weight 36 and also the holding associate 20 is severed by pulsing popular wire 38 although continuing to support stretch out wrap packing materials with the holding fellow member in order so as to once again start stretch out wrapping another fill with the portion of expand wrap packaging materials stretching involving the positioning member 20 and dispenser 28.
After wrapping, the trailing end of packaging substance could be attached towards the fill and cleaned downward by conventional wipedown mechanisms or by ionizing the atmosphere with the apertures.
Many of these functions may be managed by using a normal programmed microprocessor or any other control devices that are conventionally used with the expand wrapping apparatus.
Another embodiment in the provide invention is shown in Figs. 4a and 4b where dispenser 228 includes a roll of stretch out wrap packaging substance 230 placed on a diamond ring 234 to swivel about a side to side axis. Weight 236 can be personally placed in the wrapping region or communicated in to the wrapping location in ring 234 by conveyor 248, and keeping fellow member 220 is linearly retracted and extended into and out of your wrapping region by way of a motor driven actuator 246 like a rodless cylinder. By rotating holding member 220 so that cutter 239 engages packaging material 230, a cutter 239 is mounted on holding member 220 and is actuated.
Other path for supplying relative rotation, for dispensing the packaging material, and for severing the packaging fabric may be provided, like those displayed within the patents which are incorporated by reference. Other method for adhering and holding the wrapping substance may be provided, such as electrostatic, frictional and mechanical engagements by a keeping associate which engages and holds packaging fabric by having an unopposed or unclamped surface, or which engages just one area of your product packaging fabric.
The present invention reduces the need for capturing the film between multiple arms and the attendant complexity and movement of these units. The invention moreover cuts down on thecost and size, and unreliability in the assembly. Furthermore, it allows the keeping associate to get created to prolong up between your rollers of any curler conveyor and become retracted anytime.