CN212290644U

CN212290644U - End sealing device of heat shrink packaging machine

Info

Publication number: CN212290644U
Application number: CN202020948211.9U
Authority: CN
Inventors: 虞文; 张少兰; 陆林; 冯银才
Original assignee: Chongqing Heping Pharmaceutical Co ltd
Current assignee: Chongqing Heping Pharmaceutical Co ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2021-01-05
Anticipated expiration: 2030-05-29

Abstract

The utility model belongs to the medicine packing field specifically discloses a box charge thermal contraction packagine machine tip sealing device, which comprises a frame, conveying mechanism and processing agency, conveying mechanism includes silo down and the board of placing that is located the silo below, place and be equipped with the runner on the board in proper order, push rod and baffle, push rod one end is articulated with the runner, the other end articulates there is the swash plate, be equipped with compression spring between swash plate and push rod, be connected with elastic reset device between baffle and frame, processing agency is including arranging the splint of push rod both sides and the discharge opening that is located the baffle below in, be equipped with positioning spring between the splint, be equipped with the spout on the splint, the both sides of swash plate are equipped with the slider with spout sliding connection, the one end that splint are close to the baffle is equipped with a diaphragm plate. By adopting the technical scheme, the conveying of the to-be-processed objects is completed through the conveying mechanism and the processing mechanism, the film folding and heat sealing of the end parts of the to-be-processed objects are realized simultaneously, the structure is simple, and automatic feeding can be realized after the processing is completed.

Description

End sealing device of heat shrink packaging machine

Technical Field

The utility model belongs to the technical field of pharmaceutical packaging, a heat shrink packaging machine end sealing device is related to.

Background

The heat shrinkable film is a packaging material, is widely applied to the outer packaging of various products such as food, medicines, disinfected tableware, cultural and sports goods, handicraft gifts, printed matters, hardware and plastic products, telephones, electronic and electric appliances and the like at present, and can meet the functions of moisture and dust prevention, touch and stealing prevention, transparent display and the like of the commodities and increase the appearance attractiveness of the products particularly in the aspect of combined packaging of the irregularly-shaped articles or the commodities.

However, in the existing heat shrinkable film packaging equipment for the medicine packaging box, when the box body stops moving, the two ends of the film tube are folded by using a power mechanism to match with a push block with a specific shape, and the two ends of the film tube are folded and heat-sealed at the same time. And the cylinder is inclined to instantaneous action, and its instantaneous effort is great, and the action is unstable inadequately, often because the effort is too big and destroy the film, destroys the outward appearance of medicine packing carton even, and its heat-seal effect is unsatisfactory. Meanwhile, after heat sealing is completed, the medicine packaging box is fed by an additional conveying mechanism, and the transportation cost is increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a heat shrink packaging machine end sealing device accomplishes the transport of treating the processing thing, realizes treating the book membrane heat-seal of processing thing tip simultaneously, has simplified the device structure, and moves more stably, can also autoloading after the processing is accomplished.

In order to achieve the above object, the basic scheme of the utility model is: a sealing device for the end part of a heat shrink packaging machine comprises a frame, a conveying mechanism and a processing mechanism;

the conveying mechanism comprises a blanking groove, a placing plate, a push rod and a baffle plate, the blanking groove is fixedly connected with the rack, an opening and closing mechanism is arranged at the notch of the blanking groove, the placing plate is fixedly connected with the rack, the placing plate is positioned below the blanking groove, the push rod is positioned between the placing plate and the blanking groove, one end of the push rod is connected with a control device for controlling the push rod to horizontally and linearly reciprocate, the baffle plate is positioned at the edge of one side of the placing plate, which is far away from the control device, and a slow rebound resetting device is connected between the baffle plate and the rack;

the processing agency is including arranging the splint of push rod both sides and setting up the discharge opening in the baffle below, splint are relative with the both ends of treating the packing material, and the one end that the baffle was kept away from to splint rotates with the frame to be connected, and one side that splint are close to the push rod is equipped with the spout, and one side that the push rod is close to the baffle is equipped with the push pedal, and the both sides of push pedal are equipped with the slider with spout sliding connection, and the slider is close to one side fixedly connected with buffer spring of baffle, and the one end fixedly connected with that splint are close to the baffle rolls over the lamina membranacea, rolls over the opposite face that the lamina membranacea is located the splint, the discharge opening is located the baffle and places between the board.

The working principle and the beneficial effects of the basic scheme are as follows: the blanking groove can limit the position of the object to be packaged falling on the placing plate, and the reasonable arrangement is favorable for the subsequent packaging process. The control device can control the push rod to move horizontally back and forth, and then the push rod can push the object to be packaged falling on the placing plate. The push rod will promote to treat the packing material to placing the board edge, makes and treats that the packing material offsets with the baffle, then the push rod continues to remove to baffle place one side, treats the interact power of packing material according to push rod and baffle, guarantees to treat that the packing material receives the centre gripping and can not drop to the discharge opening. And splint are connected with the push pedal, and the push pedal removes along with the push rod, and the push pedal removes to different positions and drives splint rotation different angles, and when the push rod removed to baffle one side, the push pedal drove splint and removes to being close to push rod one side to inside centre gripping, when removing to the limit until the push rod, the folded film board on the splint offsets with the both ends of treating the packing material just, realizes treating folding into of packing material both ends film. The baffle is moved to keeping away from placing board one side to the push pedal, and the reset device that kick-backs slowly receives the baffle and removes and the effect of the pressure that produces, and the reset device that kick-backs slowly is in compression state. Simultaneously, the buffer spring arranged on the sliding block offsets with the end part of the sliding groove, the buffer spring is in a compression state, the sliding block is prevented from directly colliding with the end part of the sliding groove, the buffer action is transmitted to the clamping plate through the pushing plate, the clamping plate is prevented from being damaged by a device due to the fact that large mechanical impact is generated due to the sudden stop of the pushing plate, therefore, the film folding plate can not be driven by the mechanical impact of the clamping plate to generate large instantaneous acting force, the film on the packaging material is guaranteed not to be damaged by the film folding plate, and the film folding action is more stable.

When the film folding of the object to be packaged is finished, the control device controls the push rod to reset towards one side far away from the baffle plate, the push plate also resets along with the push rod, the clamping plate is changed into an open state again, and the film folding plate leaves the end part of the object to be packaged. Because the slow resilience characteristic of the slow resilience resetting device, the baffle slowly resets, the packing material is no longer clamped by the push plate and the baffle at the moment, the packing material falls into the discharge hole under the action of self gravity, and the two ends of the packing material are subjected to the heat sealing action of the air heater to complete the packaging process. The slow rebound resetting device can also perform elastic buffering on the baffle plate, and avoids the damage to the object to be packaged due to the rigid collision between the object to be packaged and the baffle plate.

Furthermore, the slow rebound resetting device comprises a piston cylinder, a piston plate and a piston rod, wherein the piston cylinder is arranged on one side of the baffle plate and is far away from the placing plate, the piston plate is connected with the piston cylinder in a sealing and sliding mode, the piston rod is arranged between the piston plate and the baffle plate, an air hole is formed in the baffle plate and is communicated with one side, close to the baffle plate, of the piston cylinder, the air hole inclines downwards towards the discharge hole from top to bottom, airtight gas is filled between one side, far away from the baffle plate, of the piston cylinder and the piston plate, one end of the piston.

According to the above-mentioned in-process, when the baffle moved to keeping away from and placing board one side, the baffle drove piston rod synchronous motion, and the piston rod makes the piston board move to keeping away from the one side of placing the board, is located the space increase that the piston board is close to baffle one side in the piston cylinder, and this space is in the negative pressure state, and this side space of piston cylinder treats the packing material through the gas pocket of connecting and applies suction, avoids treating that the packing material is attached on the push pedal and along with the push pedal reset movement to placing on the board. The closed gas in the space of the piston plate far away from the baffle in the piston cylinder is extruded by the piston plate and has opposite acting force on the piston plate.

When the push rod resets, the baffle no longer receives the pressure effect of push pedal transmission, then piston rod and piston plate do not receive the pressure of baffle again, and the piston plate no longer exerts the extrusion force to the airtight gas in the piston cylinder, and airtight gas makes the piston plate slowly reset to the effort of piston plate, and the piston plate drives the piston rod and slowly resets even the baffle slowly resets. In the slow resetting process of the piston plate, the negative pressure state of the space in the piston cylinder, which is at the negative pressure, is gradually weakened, the suction force applied to the object to be packaged through the air hole is weakened, and the object to be packaged automatically falls into the discharge hole under the action of the gravity of the object to be packaged.

Further, the push plate is perpendicular to the push rod, the top of the push rod is fixedly connected with the push rod, an inclined plate is arranged on one side, close to the baffle, of the push plate, the inclined plate is hinged to the push rod, a supporting spring is arranged between the inclined plate and the push rod, and the inclined plate inclines towards the baffle from top to bottom.

The swash plate is used for accepting the packing material of treating of the notch department whereabouts of unloading groove, reduces the distance of treating the direct whereabouts of packing material, plays the cushioning effect, treats like this that the packing material can directly fall on the swash plate and not with place the board contact, reduces and treats the packing material and remove the in-process and place the friction damage between the board. When the packing material was waited in the promotion simultaneously and the baffle offseted, the swash plate received the thrust of push rod and the reverse effort that the baffle passes through waiting the packing material transmission simultaneously to become the state parallel with the push pedal from the tilt state gradually, directly compare with the pushing pedal with waiting that the packing material offsets like this, make the board more gentle with the action of waiting the packing material to offset.

Furthermore, the opening and closing mechanism comprises a metal sliding door arranged at the notch of the discharging groove and a magnet arranged at the top of the push plate, and the metal sliding door can attract the magnet.

The metal sliding door moves along with the movement of the magnet on the push plate, when the push plate is located on one side, away from the baffle, of the lower trough, the magnet on the push plate drives the metal sliding door to move towards the side where the push plate is located, the notch of the lower trough is opened, automatic blanking is performed, and when the push plate moves towards one side, away from the baffle, of the lower trough, the push plate attracts the metal sliding door to move towards the metal sliding door, so that the notch of the metal sliding door is closed. The control of the feeding amount at one time can be realized according to the size specification design of the feeding groove and the object to be packaged.

Furthermore, the side surface of the discharge hole, which is not provided with the air heater, is provided with a plurality of balls.

Compared with the conventional plane, the curved surface of the ball has smaller friction force to the object to be packaged, and the possibility of friction loss of the film on the object to be packaged is reduced.

Furthermore, the side surfaces of the discharging groove corresponding to the two ends of the object to be packaged are provided with openings.

Therefore, the two ends of the object to be packaged are prevented from abutting against the side wall of the blanking groove, and the error crease is generated on the film which is not subjected to film folding and heat sealing.

Drawings

Fig. 1 is a front cross-sectional view of an embodiment of the end sealing device of the heat shrink packaging machine of the present invention;

fig. 2 is a plan view of the processing mechanism of the embodiment of the end sealing device of the heat shrink packaging machine of the present invention.

Reference numerals in the drawings of the specification include: the blanking groove 1, the runner 2, the connecting rod 3, the push rod 4, the limiting hole 5, the push plate 6, the inclined plate 7, the placing plate 8, the baffle 9, the piston cylinder 10, the piston plate 11, the piston rod 12, the discharging hole 13, the air pipe 14, the air hole 15, the clamping plate 16, the sliding groove 17, the diaphragm plate 18 and the air heater 19.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or may be connected between two elements through an intermediate medium, or may be directly connected or indirectly connected, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

As shown in figure 1: the utility model discloses a heat shrink packaging machine tip sealing device, including frame, conveying mechanism and processing agency.

Conveying mechanism includes unloading groove 1, places board 8, push rod 4 and baffle 9, and unloading groove 1 and frame fixed connection, unloading groove 1 and the side that the both ends of treating the packing material correspond are equipped with the opening, and the notch department of unloading groove 1 is equipped with the mechanism that opens and shuts. Place board 8 and frame welding, place board 8 level setting, place board 8 and be located the below of unloading groove 1. The push rod 4 is positioned between the placing plate 8 and the blanking groove 1, and one end of the push rod 4 is connected with a control device for controlling the horizontal linear reciprocating motion of the push rod 4. The baffle 9 is located and places the edge that board 8 keeps away from control device one side, is connected with the slow resilience reset device between baffle 9 and the frame.

As shown in the attached drawing 2, the processing mechanism comprises a clamping plate 16 arranged on two sides of a push rod 4 and a discharge hole 13 arranged below the baffle 9, the clamping plate 16 is opposite to two ends of a packaged object, one end, far away from the baffle 9, of the clamping plate 16 is rotatably connected with a rack (such as pin connection), a sliding groove 17 parallel to the push rod 4 is formed in the side wall, close to the push rod 4, of the push rod 4, a push plate 6 is welded on one side, close to the baffle 9, of the push plate 4, the push plate 6 is perpendicular to the push rod 4, the top of the push rod 4 is welded with the push rod 4, an inclined plate 7 is arranged on one side, close to the baffle 9, the inclined plate 7 is hinged to the push rod 4. The both sides welding of push pedal 6 has the slider with spout 17 sliding connection, and the slider has buffer spring near the one side welding of baffle 9, and the one end fixed connection (like welding or riveting etc.) that splint 16 is close to baffle 9 has a membrane folding plate 18, and membrane folding plate 18 is located the opposite face between splint 16. The discharge opening 13 is located between the baffle 9 and the placing plate 8, the two sides of the discharge opening 13 are respectively provided with an air heater 19, the air heaters 19 are opposite to the two ends of the object to be processed, and the side surface of the discharge opening 13, which is not provided with the air heater 19, is provided with a plurality of balls. In this embodiment, the length of the push plate 6 is preferably greater than the distance between the clamping plates 16 near the end of the control device, so that when the push rod 4 is located far away from the placing plate 8 and far away from the baffle 9, the clamping plates 16 are in an open state, and the clamping plates 16 are prevented from interfering with the placement of the objects to be packaged on the placing plate 8.

The opening and closing mechanism comprises a metal sliding door arranged at the notch of the discharging groove 1 and a magnet arranged at the top of the push plate 6, and the metal sliding door is made of a metal material which is attracted with the magnet, such as iron. This embodiment can be according to the setting of the notch of unloading groove 1 to the distance of placing board 8, the length of unloading groove 1's notch, width and treat the long, the relative setting between the width of processing thing, the relation between the time difference of unloading groove 1 in push pedal 6 reciprocating motion in-process in addition, the quantity of the processing thing that drops on swash plate 7 in the control unloading groove 1 once transport process.

In this embodiment, the thing of treating in the feed chute 1 can the level place also can vertically place, if treat that the processing thing level is placed, the notch width of preferred feed chute 1 with treat that the processing thing width is the same, the big terminal surface of the thing of treating processing of feed chute 1 faces the notch of feed chute 1 downwards, one end touches with the inclined plane when treating the whereabouts of processing thing, the other end continues to fall to wanting the contact with swash plate 7, thereby make the big terminal surface and the swash plate 7 laminating of treating the thing, guarantee to treat the stability of processing thing in the propelling movement process. If the object to be processed is vertically placed, preferably, the width of the notch of the blanking groove 1 is the same as that of the object to be processed, the blanking groove 1 drops one object to be processed at a time, the bottom end of the object to be processed drops on the inclined plate 7, and if the top end of the object to be processed is inclined towards the inclined plate 7, namely, the large end face of the object to be processed is attached to the inclined plate 7; if the top orientation of treating the processing thing is emptyd by placing board 8, swash plate 7 promotes like this and treats the processing thing, makes and treats the processing thing and place on placing board 8 one end and offset with

baffle

9, and 7 bottoms of swash plate offset with baffle 9 through treating the processing thing this moment, and the upper end of swash plate 7 receives the combined action of push rod 4 and push pedal 6 and becomes vertical state gradually simultaneously to will treat that the processing thing becomes vertical state.

The control device comprises a rotating wheel 2, a connecting rod 3 and a limiting hole 5, the rotating wheel 2 is rotatably connected with the rack, the rotating wheel 2 is connected with a power source for controlling the rotation of the rotating wheel, and a motor is preferably selected as the power source. One end of the connecting rod 3 is hinged with the edge of the rotating wheel 2, the other end of the connecting rod 3 is hinged with the push rod 4, the side wall of the limiting hole 5 is welded with the rack, the push rod 4 penetrates through the limiting hole 5, and the limiting hole 5 ensures that the push rod 4 keeps linear motion, so that the principle of the connecting rod is the same as that of a crank sliding block mechanism.

In the present embodiment, the slow rebound resetting device means that the rebound is not instantly completed, but is realized within a certain time, and for example, a control method of realizing the operation speed of the piston of the cylinder by controlling the air pressure or the air density or the friction coefficient between the piston plate and the inner wall of the piston cylinder may be adopted. The specific slow resilience resetting device can comprise a piston cylinder 10 which is arranged on one side of a baffle plate 9 far away from a placing plate 8, a piston plate 11 which is in sealing sliding connection in the piston cylinder 10 and a piston rod 12 which is arranged between the piston plate 11 and the baffle plate 9, wherein an air hole 15 is formed in the baffle plate 9, the air hole 15 is communicated with one side, close to the baffle plate 9, of the piston cylinder 10 through an air pipe 14, the air hole 15 inclines downwards from the top towards a discharge hole 13, airtight gas is filled between one side, far away from the baffle plate 9, of the piston cylinder 10 and the piston plate 11, one end of the piston rod 12 is welded with the piston plate 11.

Initial state: the push rod 4 is in the state of retracting, and push pedal 6 is located the silo 1 one side of keeping away from baffle 9 down, and splint 16 is in the state of opening, and buffer spring is in natural state, and swash plate 7 is located the side below of silo 1 down, and supporting spring is in the micropressure state. The metal sliding door is positioned on one side of the discharging groove 1 close to the push plate 6, and the notch of the discharging groove 1 is in an open state. The object to be processed in the blanking groove 1 falls on the inclined plate 7 or the placing plate 8, and the top of the object to be processed on the inclined plate 7 is abutted against the bottom of the object to be processed in the blanking groove 1. The baffle 9 is positioned at the edge of the placing table, and the airtight gas in the piston cylinder 10 is in a natural state.

The specific operation process comprises the following steps: the power supply is started, the power supply drives the rotating wheel 2 to rotate, the rotating wheel 2 drives the connecting rod 3 to move, the connecting rod 3 controls the push rod 4 to horizontally move on one side of the baffle 9, then the push plate 6 and the inclined plate 7 move along with the push rod 4, and the inclined plate 7 pushes the falling object to be packaged. The swash plate 7 will promote to treat the packing material to placing 8 edges of board, makes and treats packing material and baffle 9 counterbalance, and the swash plate 7 receives the thrust of push rod 4 and baffle 9 simultaneously through the reverse acting force of treating the packing material transmission to become the state parallel with push pedal 6 from the tilt state gradually. Then the push rod 4 continues to move to one side where the baffle 9 is located, and the object to be packaged is guaranteed to be clamped and not to fall to the discharge hole 13 according to the interaction force of the push rod 4 and the baffle 9. In the moving process of the push rod 4, the clamping plate 16 is connected with the push plate 6, the push plate 6 moves along with the push rod 4, and the push plate 6 moves to drive the clamping plate 16 to rotate towards one side close to the push rod 4. When the push rod 4 moves to the limit, the film folding plates 18 on the clamping plates 16 are just propped against the two ends of the object to be packaged, so that the films at the two ends of the object to be packaged are folded. Meanwhile, a buffer spring arranged on the sliding block is abutted against the end part of the sliding groove 17, and the buffer spring is in a compressed state.

When the baffle 9 is pushed to move towards the side far away from the placing plate 8, the baffle 9 drives the piston rod 12 to move synchronously, the piston rod 12 enables the piston plate 11 to move towards the side far away from the placing plate 8, the space in the piston cylinder 10, which is located at the side, close to the baffle 9, of the piston plate 11 is increased and is in a negative pressure state, and the space at the side of the piston cylinder 10 applies suction to the object to be packaged through the connected air hole 15. The airtight gas in the space of the piston cylinder 10 on the side of the piston plate 11 away from the baffle plate 9 is pressed by the piston plate 11, and has an opposite force to the piston plate 11.

After the film folding of the object to be packaged is finished, the rotating wheel 2 controls the push rod 4 to reset to the side far away from the baffle 9, the push plate 6 also resets along with the push rod 4, the clamping plate 16 is changed into the opening state again, and the film folding plate 18 leaves the end part of the object to be packaged. Baffle 9 no longer receives the pressure effect of push pedal 6 transmission, piston rod 12 and piston plate 11 are no longer receiving the pressure of baffle 9 equally, and piston plate 11 no longer exerts the extrusion force to the airtight gas in the piston cylinder 10, and airtight gas makes piston plate 11 slowly reset to the effort of piston plate 11, and piston plate 11 drives piston rod 12 and slowly resets, and piston rod 12 resets baffle 9 to the one side removal that is close to and places board 8, realizes the slow resetting of baffle 9. In the process, the to-be-packaged objects are not clamped by the push plate 6 and the baffle plate 9, the negative pressure state of the space in the piston cylinder 10 under the negative pressure is gradually weakened, the suction force applied to the to-be-packaged objects through the air holes 15 is weakened, the to-be-packaged objects automatically fall into the discharge hole 13 under the action of self gravity, and the two ends of the to-be-packaged objects are subjected to the heat sealing action of the hot air heater 19 to finish the packaging process.

In the moving process of the push rod 4, the metal sliding door moves along with the movement of the magnet on the push plate 6, when the push plate 6 moves towards one side of the discharging groove 1 away from the baffle 9, the magnet on the push plate 6 drives the metal sliding door to move towards the side of the push plate 6, the notch of the discharging groove 1 is opened, and automatic discharging is realized; when the push plate 6 moves towards one side of the discharging groove 1 far away from the baffle 9, the push plate 6 attracts the metal sliding door to move towards the metal sliding door, so that the metal sliding door closes the notch.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An end sealing device of a heat shrink packaging machine is characterized by comprising a frame, a conveying mechanism and a processing mechanism;

2. The end sealing device of a heat-shrinkable packing machine as claimed in claim 1, wherein the slow-rebound resetting device comprises a piston cylinder disposed on one side of the baffle plate far from the placing plate, a piston plate hermetically and slidably connected in the piston cylinder, and a piston rod disposed between the piston plate and the baffle plate, the baffle plate is provided with an air hole, the air hole is communicated with one side of the piston cylinder close to the baffle plate, the air hole is inclined from top to bottom toward the discharge hole, one side of the piston cylinder far from the baffle plate and the piston plate are filled with airtight gas, one end of the piston rod is fixedly connected with the piston plate, and the other end of the piston rod extends out of the.

3. The end sealing device of a heat shrink packaging machine as claimed in claim 1, wherein the push plate is perpendicular to the push rod, the top of the push rod is fixedly connected with the push rod, an inclined plate is provided at a side of the push plate close to the baffle, the inclined plate is hinged to the push rod, a support spring is provided between the inclined plate and the push rod, and the inclined plate is inclined from top to bottom and toward the baffle.

4. The end sealing device of a heat shrink packaging machine as claimed in claim 1, wherein said opening and closing mechanism comprises a metal sliding door provided at the notch of the chute and a magnet provided on the top of the push plate, the metal sliding door being attracted to the magnet.

5. The end seal arrangement of a heat shrink wrapping machine as claimed in claim 1 wherein the side of said discharge opening not provided with a heat gun is provided with a plurality of balls.

6. The end seal arrangement of a heat shrink wrapping machine as claimed in claim 1 wherein said infeed chute is provided with openings at sides corresponding to the ends of the articles to be wrapped.