CN112158382A - Fresh packaging machine - Google Patents

Abstract

The invention discloses a fresh food packaging machine which comprises a rack, an unreeling mechanism, a tunnel type heating device, a liftable upper electric heating block and a liftable lower electric heating block, wherein a film wrapping conveying belt and a film pulling mechanism are arranged on the rack. The film-wrapped conveyer belt can be used for conveying the tray filled with fresh food. The unwinding mechanism comprises an unwinding roller and a rotating roller, the unwinding roller and the rotating roller are both arranged on the rack, a plurality of puncture needles are arranged on the rotating roller, a film for releasing a roll is unwound, the puncture needles can puncture the film, and the film is turned to the right to form an upper half film and a lower half film. The film pulling mechanism is used for driving the upper half film and the lower half film to move above the film wrapping conveying belt along the conveying direction of the film wrapping conveying belt. Go up electric heat piece and electric heat piece down and all be the L type and all locate the frame, go up the electric heat piece and be in the place ahead and the right-hand side of wrapping up in the membrane conveyer belt, lower electric heat piece and last electric heat piece correspond the setting from top to bottom. The tunnel type heating device and the film wrapping conveying belt are arranged along the front-back direction. The packaging machine replaces manual film wrapping, is high in speed, and is suitable for large-batch fresh film wrapping.

Description

Fresh packaging machine

Technical Field

The invention relates to the field of packaging equipment, in particular to a fresh food packaging machine.

Background

Fresh products include fruits, vegetables and meat, and along with the improvement of people's standard of living, people sharply increase to the demand of fresh products, in order to keep fresh products's freshness, in time with the product transportation sell to consumer's hand, avoid the product to lose moisture and corruption too soon, so packaging, transportation, deposit and the sale of fresh products are a very big challenge. In order to be matched with products to be sold to consumers, a plurality of products are packaged in a quantitative small bag mode, a certain amount of products are placed in a tray, and then the products and the tray are coated together by films such as preservative films and the like.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a give birth to bright packagine machine can wrap up in the membrane with the tray that contains the give birth to bright.

The fresh food packaging machine comprises a rack, an unwinding mechanism, a liftable upper electric heating block, a liftable lower electric heating block and a tunnel type heating device, wherein a film wrapping conveying belt and a film pulling mechanism are arranged on the rack. The film wrapping conveying belt can be used for conveying a tray filled with fresh food. The unwinding mechanism is including unreeling and changeing the roller, unreel with it all locates to change the roller in the frame, it is equipped with many prick needles on the roller to change, unreel the membrane that is used for releasing the lapping, it is used for supporting to change the roller on the membrane, the prick needle can be pricked and worn the membrane, the membrane turns right to turn over and turns over in order to form first membrane and second membrane. The film pulling mechanism is used for driving the upper half film and the lower half film to move above the film wrapping conveying belt along the conveying direction of the film wrapping conveying belt. The upper electric heating block is L-shaped, and is arranged on the rack and positioned in front of and at the right of the film wrapping conveying belt; the lower electric heating block is L-shaped, the lower electric heating block is arranged on the rack, and the lower electric heating block and the upper electric heating block are arranged up and down correspondingly. The tunnel type heating device and the film wrapping conveying belt are arranged along the front-back direction, and the tunnel type heating device can be used for heating the film on the tray.

The film feeding direction is the same as the conveying direction of the film wrapping conveying belt, the film is folded rightwards along the width direction of the film wrapping conveying belt, so that an upper half film and a lower half film are formed, then the film is coiled into a roll shape, and the coiled film is placed on an unreeling machine. Unreel and be used for releasing the membrane, the membrane walk around change behind the roller by draw membrane mechanism pulling, draw membrane mechanism to order about first membrane and second membrane to be in wrap up in membrane conveyer belt top edge wrap up in the direction of delivery of membrane conveyer belt and remove, because change and be equipped with many prick needles on the roller, so prick needle and will first membrane and second membrane and prick and have worn a plurality of apertures. First membrane is in with second membrane wrap up in membrane conveyer belt top and follow when wrapping up in the direction of delivery of membrane conveyer belt and removing, arrange a plurality of trays in proper order in first membrane and second between the membrane, the tray will be half membrane pressure down on wrapping up in the membrane conveyer belt under the effect of gravity, wrap up in the membrane conveyer belt and can drive second membrane and tray and remove. Initially, the upper electric heating block is at the highest position, the lower electric heating block is at the lowest position, and the film-wrapped conveying belt is arranged between the upper electric heating block and the lower electric heating block.

The fresh food packaging machine provided by the embodiment of the invention at least has the following beneficial effects: the tray is in between half membrane and the lower half membrane and press when wrapping up in the membrane conveyer belt, goes up the decline of electric heat piece, and lower electric heat piece rises, goes up electric heat piece and lower electric heat piece butt joint half membrane and half membrane down respectively, goes up electric heat piece and electric heat piece down with half membrane from horizontal and vertical fusing and hot pressing together half membrane down for the front end of tray, the rear end tunic of right-hand member and another tray are sealed, analogize to this, finally make a tray wrap up in proper order the membrane. And because the upper half film and the lower half film are punctured with a plurality of small holes, air wrapped in the films can be discharged through the small holes, and the films are prevented from wrapping a large amount of air and the trays together. The tray wrapped with the film enters the tunnel type heating device, the tunnel type heating device heats the film, and the film is heated and shrunk so as to tightly wrap the tray. The packaging machine replaces manual film wrapping, is high in speed, and is suitable for large-batch fresh film wrapping.

According to some embodiments of the invention, the film wrapping conveying device further comprises an upper pressing frame and a lower pressing frame which can be opened and closed, the upper pressing frame is hinged on the frame and can be covered at the front end of the film wrapping conveying belt, the upper electric heating block is arranged on the upper pressing frame, the lower pressing frame is hinged on the frame and can be covered at the front end of the film wrapping conveying belt, and the lower electric heating block is arranged on the lower pressing frame.

According to some embodiments of the present invention, the upper electric heating block and the lower electric heating block are connected to the upper pressure frame and the lower pressure frame through a plurality of first elastic members and a plurality of second elastic members, respectively.

According to some embodiments of the present invention, the frame is further provided with a driving mechanism, and the driving mechanism is connected to the upper pressing frame and the lower pressing frame to drive the upper pressing frame and the lower pressing frame to open and close.

According to some embodiments of the present invention, the driving mechanism includes a rotating shaft disposed on the frame, the rotating shaft is provided with a first connecting rod and a second connecting rod, the first connecting rod and the second connecting rod are parallel to each other, the first connecting rod is hinged to a third connecting rod, the third connecting rod is hinged to the upper pressing frame, the second connecting rod is hinged to a fourth connecting rod, and the fourth connecting rod is hinged to the lower pressing frame.

According to some embodiments of the present invention, the driving mechanism further includes an air cylinder disposed on the frame, the rotating shaft is further provided with a fifth connecting rod, and a piston rod of the air cylinder is hinged to the fifth connecting rod.

According to some embodiments of the invention, the frame is further provided with a feeding conveyer belt, and the feeding conveyer belt and the film wrapping conveyer belt are arranged along the front-back direction.

According to some embodiments of the invention, an upper guide plate and a lower guide plate are respectively arranged above and below the feeding conveyor belt, and the upper guide plate and the lower guide plate can respectively guide the upper half film and the lower half film to respectively pass through the upper side and the lower side of the feeding conveyor belt.

According to some embodiments of the present invention, the unwinding roller and the rotating roller are both disposed at the left side of the feeding conveyor belt and are both parallel to the conveying direction of the feeding conveyor belt, the front side surface of the upper guide plate and the front side surface of the lower guide plate form an acute angle with the conveying direction of the feeding conveyor belt, and the front side surface of the upper guide plate and the front side surface of the lower guide plate can respectively abut against the upper half film and the lower half film, so that the conveying direction of the upper half film and the lower half film is the same as the conveying direction of the feeding conveyor belt.

According to some embodiments of the invention, the unreeling mechanism further comprises a support rod, two sliding grooves are formed in the rack, the two sliding grooves are parallel to each other, the sliding grooves and the unreeling are located on the same plane, third elastic pieces are arranged in the ends, far away from the unreeling, of the two sliding grooves, and two ends of the support rod are respectively slidably installed in the two sliding grooves and abut against the third elastic pieces.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of a fresh food packaging machine according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of the fresh food packaging machine shown in fig. 1;

fig. 3 is a schematic structural view of a film wrapping conveyer belt, an upper press frame and a lower press frame of the fresh food packaging machine shown in fig. 1;

fig. 4 is a schematic structural view of a film pulling mechanism of the fresh food packaging machine shown in fig. 1.

Reference numerals:

the film-wrapping machine comprises a frame 100, a film-wrapping conveying belt 110, an upper pressing frame 120, a first elastic part 121, a lower pressing frame 130, a second elastic part 131, a feeding conveying belt 140, an upper guide plate 141, a lower guide plate 142, a chute 150, an unreeling mechanism 200, an unreeling 210, a rotating roller 220, a pricking pin 221, a supporting rod 230, a film-pulling mechanism 300, a driving wheel 310, a driven wheel 320, a first auxiliary wheel 330, a second auxiliary wheel 340, an upper electric heating block 400, a lower electric heating block 500, a rotating shaft 600, a first connecting rod 610, a third connecting rod 611, a second connecting rod 620, a fourth connecting rod 621, a fifth connecting rod 630, an air cylinder 700, a waste material reeling 800, a tunnel type heating device 900 and a conveying roller way 910.

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 or similar 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 accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to the orientation description, such as the directions of up, down, front, rear, left, right, etc., may be based on those shown in the drawings, only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and more than, less than, more than, etc. are understood as excluding the present number, and more than, less than, etc. are understood as including the present number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1 to 3, the invention discloses a fresh food packaging machine, which comprises a frame 100, an unwinding mechanism 200, a tunnel type heating device 900, a liftable upper electric heating block 400 and a liftable lower electric heating block 500, wherein a film wrapping conveying belt 110 and a film pulling mechanism 300 are arranged on the frame 100.

Wherein, the film wrapping conveyer belt 110 can be used for conveying the tray containing the fresh food. Unwinding mechanism 200 is including unreeling 210 and changeing roller 220, unreels 210 and changes roller 220 and all locate frame 100 on, changes and is equipped with many prick needles 221 on the roller 220, unreels 210 and is used for releasing the membrane of lapping, changes roller 220 and is used for supporting on the membrane, and prick needle 221 can prick the membrane, and the membrane turns right to turn over in order to form half membrane and half membrane down. The film drawing mechanism 300 is used for driving the upper half film and the lower half film to move above the film wrapping conveying belt 110 along the conveying direction of the film wrapping conveying belt 110. The upper electric heating block 400 is L-shaped, and the upper electric heating block 400 is arranged on the rack 100 and is positioned in front of and at the right of the film wrapping conveying belt 110; the lower electric heating block 500 is L-shaped, the lower electric heating block 500 is disposed on the frame 100, and the lower electric heating block 500 and the upper electric heating block 400 are disposed up and down correspondingly. The tunnel heater 900 and the film wrapping conveyor 110 are arranged in the front-rear direction, and the tunnel heater 900 may be used to heat the film on the tray.

The film feeding direction is the same as the conveying direction of the film wrapping conveyor 110, the film is folded right along its own width direction to form an upper film half and a lower film half, and then the film is rolled up in a roll shape, and the rolled film is placed on the unwinding roll 210. Unreel 210 and be used for releasing the membrane, the membrane is walked around and is changeed the roller 220 back and is pulled by drawing membrane mechanism 300, draws membrane mechanism 300 and drives first membrane and second membrane and move along the direction of delivery of wrapping up in membrane conveyer belt 110 above wrapping up in membrane conveyer belt 110, because it is equipped with many prick needles 221 to change roller 220, so prick first membrane and second membrane and have a plurality of apertures. When the upper half film and the lower half film move above the film wrapping conveying belt 110 along the conveying direction of the film wrapping conveying belt 110, a plurality of trays are sequentially arranged between the upper half film and the lower half film, the lower half film is pressed on the film wrapping conveying belt 110 by the trays under the action of gravity, and the lower half film and the trays can be driven to move by the film wrapping conveying belt 110. Initially, the upper electric heating block 400 is at the highest position, the lower electric heating block 500 is at the lowest position, and the film wrapping tape 110 is between the upper electric heating block 400 and the lower electric heating block 500.

The tray is in between half membrane and the lower half membrane and when pressing on wrapping up in membrane conveyer belt 110, goes up electric heat block 400 and descends, and lower electric heat block 500 rises, goes up electric heat block 400 and lower electric heat block 500 butt half membrane and half membrane down respectively, goes up electric heat block 400 and electric heat block 500 with half membrane and half membrane down from horizontal and vertical fusing and hot pressing together for the front end of tray, the rear end capsule of right-hand member and another tray are sealed, so on and so on, make finally that a tray wraps up in the membrane in proper order. And because the upper half film and the lower half film are punctured with a plurality of small holes, air wrapped in the films can be discharged through the small holes, and the films are prevented from wrapping a large amount of air and the trays together. The tray wrapped with the film enters the tunnel heating device 900, the tunnel heating device 900 heats the film, and the film shrinks due to heating so as to tightly wrap the tray. The packaging machine replaces manual film wrapping, is high in speed, and is suitable for large-batch fresh film wrapping.

The tunnel type heating device 900 comprises a tunnel, an electric heating tube and a roller conveyor 910, the electric heating tube and the roller conveyor 910 are arranged in the tunnel, the film-wrapped conveying belt 110 and the roller conveyor 910 are arranged in the front-back direction, and the tray can be transferred to the roller conveyor 910 from the film-wrapped conveying belt 110. When the pallet is transported on the roller conveyor 910, the electric heating tube generates heat and heats the film, and the film shrinks due to heat so as to tightly wrap the pallet.

In some embodiments of the present invention, the packaging machine further includes an upper pressing frame 120 and a lower pressing frame 130, which are openable and closable, the upper pressing frame 120 is hinged to the frame 100 and can be covered on the front end of the film wrapping conveying belt 110, the upper electric heating block 400 is arranged on the upper pressing frame 120, the lower pressing frame 130 is hinged to the frame 100 and can be covered on the front end of the film wrapping conveying belt 110, and the lower electric heating block 500 is arranged on the lower pressing frame 130. When the upper pressing frame 120 and the lower pressing frame 130 are combined together, the upper electric heating block 400 and the lower electric heating block 500 can be abutted on the left, right and front of the front end of the film wrapping conveying belt 110, and the upper half film and the lower half film can be fused and hot pressed together along the transverse direction and the longitudinal direction of the upper electric heating block 400 and the lower electric heating block 500. The upper pressing frame 120 and the lower pressing frame 130 are both connected to the frame 100 in a hinged manner, that is, the upper pressing frame 120 and the lower pressing frame 130 can swing to open and close the upper pressing frame 120 and the lower pressing frame 130.

In some embodiments of the present invention, the upper and lower electric heating blocks 400 and 500 are connected to the upper and lower pressure frames 120 and 130 through the plurality of first and second elastic members 121 and 131, respectively. The first elastic member 121 and the second elastic member 131 both have a contracting function, and the arrangement of the plurality of elastic members can keep the upper electric heating block 400 and the lower electric heating block 500 horizontal when encountering external force, so as to finally ensure that the upper electric heating block 400 can be tightly attached to the lower electric heating block 500 to fuse the film and thermally fuse the upper half film and the lower half film together.

In some embodiments of the present invention, the first elastic member 121 and the second elastic member 131 may be both springs.

In some embodiments of the present invention, the frame 100 is further provided with a driving mechanism, and the driving mechanism is connected to the upper pressing frame 120 and the lower pressing frame 130 to drive the upper pressing frame 120 and the lower pressing frame 130 to open and close. The driving mechanism drives the upper pressing frame 120 and the lower pressing frame 130 to rotate around the hinge point, so that the upper electric heating block 400 and the lower electric heating block 500 can be driven to be close to or far away from each other, and the sealing of the front end film, the rear end film and the right end film of the tray is further completed. The whole upper pressing frame 120 and the whole lower pressing frame 130 do not need to be driven to integrally lift, so that the power requirement of the driving mechanism on the packaging machine is low.

It is understood that the upper frame 120 and the lower frame 130 may be symmetrically disposed with respect to the upper surface of the film wrapping tape 110, and when the upper frame 120 and the lower frame 130 are combined, the junction of the upper frame 120 and the lower frame 130 is flush with the upper surface of the film wrapping tape 110.

In some embodiments of the present invention, the upper pressing frame 120 includes a horizontal plate, and a left side plate and a right side plate disposed on two ends of the horizontal plate, both the left side plate and the right side plate are perpendicular to the horizontal plate, both an end of the left side plate away from the horizontal plate and an end of the right side plate away from the horizontal plate are hinged to the frame 100, the left side plate and the right side plate can be respectively located at the left and the right of the film-wrapping conveying belt 110, the horizontal plate can move to the front of the film-wrapping conveying belt 110, and the upper heating block 400 is disposed on. When the upper pressing frame 120 rotates to move the free end of the upper pressing frame 120 downward, i.e., the horizontal plate downward, the left side plate, the right side plate, and the horizontal plate are respectively located at the left, right, and front of the film wrapping conveying belt 110, i.e., the upper pressing frame 120 can be sleeved on the front end of the film wrapping conveying belt 110. The upper pressing frame 120 has a symmetrical structure, so that the upper pressing frame is balanced in stress and high in structural strength. Similarly, the lower press frame 130 may have the same or similar structure as the upper press frame 120.

It can also be understood that the upper pressing frame 120 and the lower pressing frame 130 are both U-shaped, the open end of the upper pressing frame 120 is hinged to the frame 100, the open end of the lower pressing frame 130 is also hinged to the frame 100, the upper pressing frame 120 and the lower pressing frame 130 can be sleeved on the front end of the film wrapping conveying belt 110, and when the upper half film and the lower half film clamp the pallet to enter the film wrapping conveying belt 110, the upper pressing frame 120 and the lower pressing frame 130 are combined immediately, so that the film wrapping of the pallet is completed.

In some embodiments of the present invention, the driving mechanism includes a rotating shaft 600 disposed on the frame 100, the rotating shaft 600 is provided with a first connecting rod 610 and a second connecting rod 620, the first connecting rod 610 and the second connecting rod 620 are parallel to each other, the first connecting rod 610 is hinged to a third connecting rod 611, the third connecting rod 611 is hinged to the upper pressing frame 120, the second connecting rod 620 is hinged to a fourth connecting rod 621, and the fourth connecting rod 621 is hinged to the lower pressing frame 130.

When the rotating shaft 600 rotates, the first link 610 and the second link 620 are driven to rotate, and the first link 610 and the second link 620 drive the upper pressing frame 120 and the lower pressing frame 500 to rotate through the third link 611 and the fourth link 621, respectively. Since the first link 610 and the second link 620 are parallel to each other, the rotation directions of the upper frame 120 and the lower frame 500 are opposite, that is, the upper frame 120 and the lower frame 500 are opened or closed.

In some embodiments of the present invention, the driving mechanism further includes a cylinder 700 disposed on the frame 100, a fifth connecting rod 630 is further disposed on the rotating shaft 600, and a piston rod of the cylinder 700 is hinged to the fifth connecting rod 630. The cylinder 700 drives the shaft 600 to rotate back and forth around its central axis through the fifth link 630, and the cylinder 700 itself drives the shaft to move back and forth or back and forth, which is most suitable for this purpose.

Specifically, two first links 610, two second links 620, two third links 611, and two fourth links 621 are provided. A first link 610, a second link 620, a third link 611, and a fourth link 621 are located to the left of the lower pressure frame 130; the other first link 610, the other second link 620, the other third link 611 and the other fourth link 621 are located at the right side of the lower pressure frame 130, such arrangement can make the left and right sides of the upper pressure frame 120 and the lower pressure frame 130 stressed in a balanced manner, avoid the upper pressure frame 120 and the lower pressure frame 130 from deforming, and prolong the service life of the upper pressure frame 120 and the lower pressure frame 130.

In some embodiments of the present invention, the frame 100 is further provided with a feeding conveyer belt 140, and the feeding conveyer belt 140 and the film wrapping conveyer belt 110 are arranged in the front-back direction. The tray containing fresh food can be directly put on the feeding conveyer belt 140, then the tray is fed between the upper half film and the lower half film through the feeding conveyer belt 140 and falls on the film wrapping conveyer belt 110, and the feeding conveyer belt 140 can conveniently put the tray.

In some embodiments of the present invention, the feeding conveyer belt 140 is provided above and below with an upper guide plate 141 and a lower guide plate 142, respectively, and the upper guide plate 141 and the lower guide plate 142 can guide the upper half film and the lower half film to pass above and below the feeding conveyer belt 140, respectively. The upper and lower film halves are as if the upper and lower film halves were wrapped around the feeding conveyor 140, i.e., the upper and lower film halves are wrapped around the pallet, so that the pallet is already sandwiched between the upper and lower film halves when it is transferred to the wrapping conveyor 110.

In some embodiments of the present invention, the unwinding roll 210 and the rotating roll 220 are both disposed at the left side of the feeding conveyor belt 140 and are both parallel to the conveying direction of the feeding conveyor belt 140, the front side surface of the upper guide plate 141 and the front side surface of the lower guide plate 142 form an acute angle with the conveying direction of the feeding conveyor belt 140, and the front side surface of the upper guide plate 141 and the front side surface of the lower guide plate 142 can respectively abut against the upper half film and the lower half film, so that the conveying direction of the upper half film and the lower half film is the same as the conveying direction of the feeding conveyor belt 140.

The upper half film and the lower half film pass above and below the feeding conveyer belt 140, respectively, and when a tray is placed on the feeding conveyer belt 140, the tray is already positioned between the upper half film and the lower half film. Because the front side of the upper guide plate 141 and the front side of the lower guide plate 142 form an acute angle with the conveying direction of the feeding conveyor belt 140, that is, the front of the front side of the upper guide plate 141 is a vacant area, a tray can be conveniently and directly placed in the vacant area. Because the membrane is folded in half to form the part between the upper half membrane and the lower half membrane, the connection part of the upper half membrane and the lower half membrane is a sealing area. Since the unwinding roll 210 and the rotating roll 220 are both disposed at the left of the feeding conveyor belt 140, the sealing area of the film released from the unwinding roll 210 faces the front of the feeding conveyor belt 140, and since the front side of the upper guide plate 141 and the front side of the lower guide plate 142 form an acute angle with the conveying direction of the feeding conveyor belt 140, the upper half film changes the conveying direction of the upper half film by reversing the inner side and the outer side in the area of the upper guide plate 141, and the lower half film changes the conveying direction of the upper half film by reversing the inner side and the outer side in the area of the lower guide plate 142.

In some embodiments of the present invention, the unwinding mechanism 200 further includes a supporting rod 230, two sliding slots 150 are disposed on the frame 100, the two sliding slots 150 are parallel to each other, the sliding slots 150 and the unwinding reel 210 are located on the same plane, a third elastic member is disposed in one end of each of the two sliding slots 150 far away from the unwinding reel 210, and two ends of the supporting rod 230 are slidably mounted in the two sliding slots 150 and abut against the third elastic member.

Since the chute 150 and the unwinding reel 210 are located on the same plane, that is, the length direction of the chute 150 is perpendicular to the length direction of the unwinding reel 210, the third elastic member pushes the supporting rod 230 toward the unwinding reel 210. When the rolled film is placed on the unwinding roll 210, the third elastic member drives the supporting rod 230 to press on the rolled film, so that the film is pressed, and resistance is provided to the release of the film, so that the film released by the film is kept in a tensioned state. The third elastic member may be a spring.

With further reference to fig. 4, the film drawing mechanism 300 includes a motor and a driven wheel 320 disposed on the frame 100, the motor is provided with a driving wheel 310 engaged with the driven wheel 320, and the driving wheel 310 and the driven wheel 320 are disposed at the right side of the film wrapping conveying belt 110 and can simultaneously clamp and drive the upper half film and the lower half film. The motor drives the driving wheel 310 and the driven wheel 320 to rotate, so that the upper half film and the lower half film are driven to move along the conveying direction of the film wrapping conveying belt 110.

When the upper half film and the lower half film are longitudinally fused and hot-pressed together by the upper electric heating block 400 and the lower electric heating block 500, the upper half film and the lower half film are fused, the upper half film and the lower half film at the part which is not wrapped by the tray are waste films, and the driving wheel 310 and the driven wheel 320 can clamp and pull the waste films.

It can be understood that the film drawing mechanism 300 further includes a first auxiliary wheel 330 and a second auxiliary wheel 340 disposed on the frame 100, a first belt is disposed around the driving wheel 310 and the first auxiliary wheel 330, a second belt is disposed around the driven wheel 320 and the second auxiliary wheel 340, the first belt and the second belt abut against each other and can clamp the upper film and the lower film, and the first belt and the second belt rotate to draw the films to move along the conveying direction of the film wrapping conveying belt 110.

In some embodiments of the present invention, a waste roll 800 is disposed on the rack 100, and the waste roll 800 can be used to receive waste films. Waste rolling 800 rolls up the waste film, avoids the waste film to occupy too much workshop space, makes things convenient for the collection and the unified processing of waste film.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (10)

1. A fresh food packaging machine, comprising:

the fresh food packaging machine comprises a rack (100), wherein a film wrapping conveying belt (110) is arranged on the rack (100), and the film wrapping conveying belt (110) can be used for conveying a tray containing fresh food;

the unwinding mechanism (200) comprises an unwinding roller (210) and a rotating roller (220), the unwinding roller (210) and the rotating roller (220) are both arranged on the rack (100), a plurality of puncturing needles (221) are arranged on the rotating roller (220), the unwinding roller (210) is used for releasing a coiled film, the film is folded to the right to form an upper half film and a lower half film, the rotating roller (220) is used for abutting against the film, and the puncturing needles (221) can puncture the film;

the film drawing mechanism (300) is arranged on the rack (100), and the film drawing mechanism (300) is used for driving the upper half film and the lower half film to move above the film wrapping conveying belt (110) along the conveying direction of the film wrapping conveying belt (110);

the lifting upper electric heating block (400), the upper electric heating block (400) is L-shaped, and the upper electric heating block (400) is arranged on the rack (100) and is positioned in front of and at the right of the film wrapping conveying belt (110);

the lifting lower electric heating block (500), the lower electric heating block (500) is L-shaped, the lower electric heating block (500) is arranged on the rack (100), and the lower electric heating block (500) and the upper electric heating block (400) are arranged up and down correspondingly;

a tunnel heating device (900), the tunnel heating device (900) and the film wrapping conveyor belt (110) are arranged along the front-back direction, and the tunnel heating device (900) can be used for heating the film on the tray.

2. The fresh food packaging machine as claimed in claim 1, wherein: still including last pressure frame (120) and the frame (130) that push down that can open and shut, go up pressure frame (120) articulate in frame (100) are gone up and can be covered and establish wrap up in the front end of membrane conveyer belt (110), go up electric heat piece (400) and locate go up on pressure frame (120), push down frame (130) articulate in frame (100) are gone up and can be covered and establish wrap up in the front end of membrane conveyer belt (110), electric heat piece (500) are located down on pressure frame (130).

3. The fresh food packaging machine as claimed in claim 2, wherein: the upper electric heating block (400) and the lower electric heating block (500) are respectively connected with the upper pressure frame (120) and the lower pressure frame (130) through a plurality of first elastic pieces (121) and a plurality of second elastic pieces (131).

4. The fresh food packaging machine as claimed in claim 2 or 3, wherein: the rack (100) is also provided with a driving mechanism, and the driving mechanism is connected with the upper pressing frame (120) and the lower pressing frame (130) to drive the upper pressing frame (120) and the lower pressing frame (130) to open and close.

5. The fresh food packaging machine as claimed in claim 4, wherein: the actuating mechanism is including locating pivot (600) in frame (100), be equipped with first connecting rod (610) and second connecting rod (620) on pivot (600), first connecting rod (610) with second connecting rod (620) are parallel to each other, it has third connecting rod (611) to articulate on first connecting rod (610), third connecting rod (611) with it is articulated to go up to press frame (120), it has fourth connecting rod (621) to articulate on second connecting rod (620), fourth connecting rod (621) with it is articulated to press frame (130) down.

6. The fresh food packaging machine as claimed in claim 5, wherein: the driving mechanism further comprises an air cylinder (700) arranged on the rack (100), a fifth connecting rod (630) is further arranged on the rotating shaft (600), and a piston rod of the air cylinder (700) is hinged to the fifth connecting rod (630).

7. The fresh food packaging machine as claimed in claim 1, wherein: the frame (100) is also provided with a feeding conveyer belt (140), and the feeding conveyer belt (140) and the film wrapping conveyer belt (110) are arranged along the front-back direction.

8. The fresh food packaging machine as claimed in claim 7, wherein: an upper guide plate (141) and a lower guide plate (142) are respectively arranged above and below the feeding conveying belt (140), and the upper guide plate (141) and the lower guide plate (142) can respectively guide the upper half film and the lower half film to respectively pass through the upper side and the lower side of the feeding conveying belt (140).

9. The fresh food packaging machine as claimed in claim 8, wherein: the unreeling device is characterized in that the unreeling device (210) and the rotating roller (220) are arranged on the left side of the feeding conveying belt (140) and are parallel to the conveying direction of the feeding conveying belt (140), the front side surface of the upper guide plate (141), the front side surface of the lower guide plate (142) and the conveying direction of the feeding conveying belt (140) form acute angles, and the front side surface of the upper guide plate (141) and the front side surface of the lower guide plate (142) can be respectively abutted against the upper half film and the lower half film, so that the conveying directions of the upper half film and the lower half film are the same as the conveying direction of the feeding conveying belt (140).

10. The fresh food packaging machine as claimed in claim 1, wherein: unwinding mechanism (200) still includes bracing piece (230), be equipped with two spout (150) on frame (100), two spout (150) are parallel to each other, spout (150) with unreel (210) and be in the coplanar, two spout (150) are kept away from all be equipped with the third elastic component in the one end of unreeling (210), the both ends of bracing piece (230) can install in two respectively with sliding and the butt in spout (150) the third elastic component.

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