RU197563U1 - FILM SHELL WELDING MECHANISM FOR PACKING A STACK OF ITEMS ON A PALLET - Google Patents

Abstract

The utility model relates to mechanisms, devices for welding and segments of a film sheath in the form of a cap from a roll of shrink film for packaging various products that are stacked on a pallet. It can be used for packaging glass containers, bricks, ceramic products and other products. The mechanism of welding a film shell for packing a stack of objects on a pallet contains a frame, two fixed and two movable clamps supplied in the vertical plane of the film. The lower fixed clip is made in the form of a welding knife and is equipped with an element for heating its working surface, above it there is an upper fixed clip, the working surface of which is covered with a plate of elastic material. The working surfaces of two movable clamps are covered with plates of elastic material and mounted on a carriage suspended in the upper part on an axis mounted on the frame with the possibility of turning the carriage around the axis by a pneumatic cylinder until the film is pressed by the upper movable clamp to the upper fixed clamp. The working surface of the lower movable clamp to the working surface of the welding knife with the possibility of heating it with the formation of a weld along the entire width of the film, the pneumatic cylinder returns the carriage to its original position. The welding knife is made of an aluminum alloy of two components, each of which is made in the form of a parallelepiped, on the side of which a longitudinal channel with a cross-section along the radius is made. The working surface is formed by the apex of a trapezoidal rib placed on the smaller side of the box. The components are turned to each other and rigidly bonded to each other with the formation of the longitudinal channels of the hole and the installation of a heating element in it of two working surfaces of the welding knife formed in the same plane. The working surfaces of the welding knife are made with the possibility of adjusting the pressing force of the film to them by the working surface of the lower movable clamp and its heating with the formation of two welds along the entire width of the film. The welding knife is connected to the frame by a threaded connection with the possibility of its movement and regulation of the pressing force of the film to the two working surfaces of the welding knife by the working surface of the lower movable clamp, covered with a plate of elastic material. EFFECT: increased stability of high-quality execution by the welding mechanism of welding seams in the manufacture of a film sheath providing high-quality packaging of a wide range of packaged items. 1 s.p. f-ly, 4 ill.

Description

The utility model relates to mechanisms (devices) for welding and segments of a film sheath in the form of a cap from a roll of shrink film for packaging various products mounted on a pallet stacked. It can be used for packaging glass containers, bricks, ceramic products and other products.

The most simple and cost-effective method, providing a sufficiently high strength characteristics of the joints by welding of polymeric materials, including shrink film in the packaging industry, is contact - heat welding. An electrode made of heat-conducting material serves as a heater in this welding method. The welding time and its quality with a constantly heated electrode corresponds to the time of its contact with the film being welded and the pressure exerted on it. ("Directory of polymer materials" under the general editorship of KI Zaitsev and LN Matsyuk. Moscow. "Engineering", 1988)

Known RF Patent for the invention No. 2247065, application No. 200116681, dated 04.06.2003, the construction of which uses the contact-heat welding method in the manufacture of a film sheath for packaging. In the well-known patent for "Installation of manufacturing a film shell for a stack of objects" on a stack of objects mounted on a pallet, put on a film shell made by welding mechanisms and segments in the form of a cap of heat-shrinkable film supplied by rollers from a roll of heat-shrinkable material wound and folded, according to the generally accepted pattern, with folds on the sides of the sleeve installed in the roll holder of the installation.

Known design "Machines for the manufacture and dressing of a bag semi-automatic", manufactured according to TU 5171-023-00244535-2016 at LPU-109.03.

The manufacture of a packaging bag (film shell in the form of a cap) in this design is made of heat-shrink film (GOST RF 25951-83 “Heat-shrink film”, sleeve with folding).

The mechanism for welding a film sheath for packing a stack of objects on a pallet of the “Semi-automatic bag making and dressing machine” described in the “Operation Guide” contains a frame, two fixed and two movable clamps supplied to the welding mechanism in the vertical plane of the film. The lower fixed clip is made in the form of a welding knife and is equipped with an element for heating its working surface, above it there is an upper fixed clip, the working surface of which is covered with a plate of elastic material.

The working surfaces of two movable clamps are covered with plates of elastic material and mounted on a carriage suspended in the upper part on an axis mounted on the frame with the possibility of turning the carriage around the axis by a pneumatic cylinder until the film is pressed by the upper movable clamp to the upper fixed clamp, and the working surface of the lower movable clamp to the working surface of the welding knife with the possibility of heating it with the formation of a weld along the entire width of the film. After the formation of the weld, the film sheath made by the mechanism of the segments is cut from the film supplied from the roll. The pneumatic cylinder welding mechanism returns the carriage with two movable clamps to their original position.

The prototype has several disadvantages.

The upper fixed and upper and lower movable clamps are equipped with plates of elastic material, characterized by return "elastic deformation" (rubber, rubber, etc.) and tend to change in structure over time, affecting the reduction of elastic properties. Which, as a result, causes a decrease in the pressing force (pressure) exerted on the film during welding and reduces the quality of the welds of the manufactured film sheath.

In addition, the thickness and quality of the film used for the manufacture of film shells, a change in the range of packaged items, increased safety requirements increase the stability requirements for the quality of the welds of the manufactured film shell.

The purpose of the utility model is to eliminate these drawbacks, namely, to increase the stability of high-quality manufacture of a film shell for packing a stack of items on a pallet, which ensures high-quality packaging of a wide range of manufactured items, and the stability of the quality of welds.

The problem is solved in that the mechanism of welding a film shell for packing a stack of objects on a pallet containing a frame, two fixed and two movable clamps supplied in the vertical plane of the film, wherein, the lower stationary clamp is made in the form of a welding knife and is equipped with an element for heating its working surface , above it there is a fixed upper clamp, the working surface of which is covered with a plate of elastic material, and the working surfaces of two movable clamps are covered with plates of elastic material and mounted on a carriage suspended in the upper part on an axis fixed to the frame with the possibility of turning the carriage around the axis by pneumatic the cylinder until the film is pressed by the upper movable clip to the upper fixed clip, and the working surface of the lower movable clip to the working surface of the welding knife with the possibility of heating it with the formation of a weld along the entire width of the film, returning the carriage with the pneumatic cylinder to its original position.

According to a utility model, the welding knife is made of an aluminum alloy of two components, each of which is made in the form of a parallelepiped, on the side of which a longitudinal channel with a cross-section along the radius is made, and the working surface is formed by the top of a trapezoid rib located on the smaller side parallelepiped, while the components are turned to each other and rigidly bonded to each other with the formation of the longitudinal channels of the hole and the installation of a heating element in it of two working surfaces of the welding knife formed in the same plane, while the working surfaces of the welding knife are made with the possibility of adjusting the pressing force of the film to the working surface of the lower movable clamp and its heating with the formation of two welds along the entire width of the film.

In addition, according to the utility model, in that the welding knife is connected to the frame by a threaded connection with the possibility of moving and adjusting the pressing force of the film to the two working surfaces of the welding knife with the working surface of the lower movable clamp covered with a plate of elastic material.

The utility model is illustrated by the drawings: FIG. 1. - a schematic view of the mechanism of welding a film sheath for packing a stack of objects on a pallet in its original position. (The shrink film supplied to the mechanism is shown by thin lines in the drawing) In FIG. 2 - view along arrow A in FIG. 1. In FIG. 3. - section along BB in FIG. 2. (Rotated)

In FIG. 4. - a schematic view of the mechanism of welding of the film membrane for packing a stack of objects on a pallet in the working position.

In FIG. 1 - shows a schematic view of the welding mechanism of the film sheath "Machines for the manufacture and dressing of a bag semi-automatic" in the initial position. Pos.1 - frame of the welding mechanism (the contours of the frame in Fig. Are shown conditionally), pos. 14 - shrink film supplied to the welding mechanism in a vertical plane by the feeder "Semi-automatic bag making and dressing machines" (the feed mechanism is not shown in the figures). On the frame 1 of the welding mechanism, a lower fixed film clip is installed, made in the form of a welding knife 2 (Fig. 1, 3, 4.), which is equipped with a heating element 4 of its two working surfaces 3 (Fig. 2, 3). Above the welding knife 2 on the frame 1 there is a fixed clamp 5, the working surface of which is covered with a plate of elastic material 6. On the other side of the film 14, an axis 12 is fixed in the upper part of the frame 1 (Fig. 1). The carriage 11 is suspended on the axis 12, on which mounted the upper movable clamp 7 of the film 14, and the lower movable clamp 8 of the film 14. The working surfaces of the movable clamps pos.7 and pos.8 are covered with elastic plates pos.9 and pos.10, respectively. The carriage And can be rotated around the axis 12 by a pneumatic cylinder 13 (Fig. 1, 4), pivotally connected to the frame and the carriage. Moreover, the carriage rotates until the film 14 is pressed by the upper movable clip 7 to the upper stationary mode 5, and the working surface of the lower movable clip 8, covered with a plate of elastic material 10, to two working surfaces 3 of the welding knife 2.

The welding knife 2 is made of an aluminum alloy of two components pos.15 (Fig. 3), each of which is made in the form of a parallelepiped, on the side of which there is a longitudinal channel made along the radius of pos. 16 (Fig. 3), and the working surface 3 is formed by the top of the trapezoidal rib placed on the smaller side of the box. The components are rotated to each other and rigidly fastened together (as an example: a threaded connection pos. 17 of Fig. 3), with the formation of a longitudinal hole and the installation of a heating element 4 (Fig. 1, 3) of two formed in one plane , working surfaces 3 of the welding knife 2.

A welding knife 2 mounted on the frame 1 is connected to the frame by a threaded connection 18 (Fig. 1, 4) with the possibility of linear movement of the welding knife to regulate the pressing force of the film to the two working surfaces 3 of the welding knife 2 by the working surface of the lower movable clamp 8 with a coated plate of elastic material Pos. 10 (Figs. 1, 4)

The mechanism of welding a film shell for packing a stack of objects on a pallet works as follows.

In the initial position of FIG. 1, the carriage 11 is in its highest position. The film 14, supplied in a vertical plane to the welding mechanism, of a certain size along the length of the film sheath being produced, is set by the feed mechanism of the “Semi-automatic bag making and dressing machine” (the feeding mechanism is not shown in the figures) and is placed in the gap between the stationary upper clamp 5, welding knife 2 and the carriage 11 with the upper 7, lower 8 movable clamps.

In the working position (Fig. 4), the carriage 11 is rotated around the axis 12 by a pneumatic cylinder 13 (Figs. 1, 4) until the film is pressed by the upper movable clamp 7 to the upper stationary mode 5, and the working surface of the lower movable clamp 8 is covered with a plate of elastic material 10, to two working surfaces 3 of the welding knife and its heating with the formation of two welds along the entire width of the film.

The made film sheath is cut off by the mechanism of cuts from the film supplied by the feeder of the “Semi-automatic bag making and dressing machine”. (Not shown in the figures).

After that, the mechanism of welding the film membrane for packing a stack of objects on a pallet returns to its original position.

The adjustment of the pressing force (pressure) exerted on the film during welding, which ensures the quality of the welds of the manufactured film sheath, is performed when the welding mechanism is installed in the working position (Fig. 4).

At the same time, the welding knife 2 by the threaded connection 18 (Fig. 1, 4) is moved by the operator in the direction of the plate of elastic material 10, which covers the lower movable clamp 8, pressed against its two working surfaces 3. Moving the welding knife puts pressure on the plate of elastic material 10 , affects its deformation and creates sufficient pressure (pressure) exerted on the film during welding during its heating by two working surfaces 3 of the welding knife 2. The adequacy of the movement of the welding knife is determined by the quality control of welding two welds along the entire width of the film of the film sheath being made.

The technical result from a utility model, obtained as a result of improving the design of the mechanism of welding a film shell for packing a stack of items on a pallet, is to increase the stability of the quality of the welding mechanism used for welding seams in the manufacture of a film shell that provides high-quality packaging for a wide range of packaged items.

Claims (2)

1. The mechanism of welding a film sheath for packing a stack of objects on a pallet containing a frame, two fixed and two movable clamps supplied in the vertical plane of the film, the lower fixed clamp made in the form of a welding knife and equipped with an element for heating its working surface, the upper fixed one is placed over it clamp, the working surface of which is covered with a plate of elastic material, and the working surfaces of two movable clamps are covered with plates of elastic material and mounted on a carriage suspended in the upper part on an axis mounted on the frame with the possibility of turning the carriage around the axis by a pneumatic cylinder until the film is pressed by the upper movable clamp to the upper fixed clamp, and the working surface of the lower movable clamp to the working surface of the welding knife with the possibility of heating it with the formation of a weld along the entire width of the film, the pneumatic cylinder returns the carriage to its original position, characterized in that the welding knife made of an aluminum alloy of two components, each of which is made in the form of a parallelepiped, on the side of which a longitudinal channel with a cross-section along the radius is made, and the working surface is formed by the top of a trapezoidal rib placed on the smaller side of the parallelepiped, while the components are rotated each other to each other and rigidly bonded to each other with the formation of longitudinal channels of the hole and installation of a heating element in it of two working surfaces of the welding knife formed in the same plane, while the working surfaces of the welding knife are made with the possibility of adjusting the pressing force of the film to them by the working surface of the lower movable clamp and its heating with the formation of two welds along the entire width of the film. 2. The welding mechanism of the film sheath according to claim 1, characterized in that the welding knife is connected to the frame by a threaded connection with the possibility of its movement and regulation of the pressing force of the film to two working surfaces of the welding knife with the working surface of the lower movable clamp covered with a plate of elastic material.

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