CN213261371U

CN213261371U - Packaging bag forming structure

Info

Publication number: CN213261371U
Application number: CN202021993068.1U
Authority: CN
Inventors: 蔡从文
Original assignee: Jiaxing Hexin Kailai Mechanical Equipment Co ltd
Current assignee: Jiaxing Hexin Kailai Mechanical Equipment Co ltd
Priority date: 2020-09-14
Filing date: 2020-09-14
Publication date: 2021-05-25
Anticipated expiration: 2030-09-14

Abstract

The packaging bag forming structure comprises a forming part, wherein a plastic film for manufacturing the packaging bag is coated on the outer surface of the forming part, the forming part comprises a first forming section with a rectangular cross section and a second forming section connected with the first forming section, the second forming section comprises two inclined planes which are oppositely arranged and extend towards the central axis direction of the forming part, and the two inclined planes are connected through two inner concave surfaces which are sunken towards the central axis direction of the forming part; and the outer sides of the two concave surfaces are respectively provided with a rolling wheel which is arranged in a rolling way, and the outer edge of the rolling wheel corresponds to the valley bottom of the concave surface.

Description

Packaging bag forming structure

Technical Field

The utility model particularly relates to a wrapping bag shaping structure.

Background

A packing bag forming device for a bag packing machine comprises a forming die, a frame is arranged outside the forming die, conveying rollers are elastically abutted to two sides of the lower portion of the forming die, the edges of the left side and the right side of the lower portion of the cylindrical forming die are provided with outwards extending edges, a front flattening roller and a rear flattening roller which are connected with the frame are elastically abutted to the front side and the rear side of the joint portion of the upper portion and the lower portion of the forming die respectively, the front flattening roller and the rear flattening roller are respectively arranged on a pair of swing rods which are hinged on the frame, the upper end of each swing rod is respectively provided with a convex tooth, the pair of swing rods provided with the front flattening roller and the pair of swing rods provided with the rear flattening roller are meshed one by one through the convex teeth, a spring is connected between the swing rods meshed at the upper ends of the two swing rods, a pawl with a ratchet is hinged on the frame, a convex edge matched with a ratchet is arranged at the front end of the swing rod provided with the front ratchet flattening roller, the right side of the forming die is respectively provided with a presser foot, the two presser feet are close to the forming die, the inner side and the outer side of the edge eaves at the lower part of the forming die are respectively provided with a paper stacking wheel, the paper stacking wheels are close to or attached to the edge eaves of the forming die, the left side and the right side below the forming die are respectively provided with a shaping presser foot, and the shaping presser feet are connected with a transmission device arranged on the rack. The packaging bag formed by the scheme has uneven crease lines, and the crease lines are inclined frequently, so that the whole packaging bag is deformed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, provide a structural design is reasonable, neat wrapping bag shaping structure of crease.

The utility model adopts the technical scheme that the packaging bag forming structure comprises a forming part, a plastic film for manufacturing the packaging bag is coated on the outer surface of the forming part, the forming part comprises a first forming section with a rectangular cross section and a second forming section connected with the first forming section, the second forming section comprises two inclined planes which are oppositely arranged and extend towards the central axis direction of the forming part, and two inner concave surfaces which are sunken towards the central axis direction of the forming part are connected between the two inclined planes; and the outer sides of the two concave surfaces are respectively provided with a rolling wheel which is arranged in a rolling way, and the outer edge of the rolling wheel corresponds to the valley bottom of the concave surface.

Wherein, the quantity of the gyro wheel that corresponds the interior concave surface of homonymy is 2 at least, and the gyro wheel rotates with the wheel seat and links to each other.

Wherein, still include and be the connecting rod that sets up with wheel seat is perpendicular.

And the valley bottom on the inner concave surface, which is close to the first molding section, extends towards the direction close to the central axis of the molding part when extending towards the direction far away from the first molding section.

And the third forming section is connected with the second forming section and comprises two planes, the two planes are connected with the inclined plane, and the two planes are connected by an inner concave surface.

Wherein, the two planes are arranged in parallel; the valley bottoms of the two concave surfaces are arranged in parallel.

The plastic film forming device comprises a first forming section and a second forming section, wherein the first forming section is provided with a plastic film, the second forming section is provided with a plastic film, the first forming section is provided with a first side surface and a second side surface, the first side surface and the second side surface are opposite to each other, the plastic film is arranged on the first forming section, the second.

The first forming section is provided with a first forming section, wherein a fixing plate is arranged on a boundary line of two adjacent side surfaces on the first forming section, the fixing plate is provided with an inclined surface, and the inclined surface inclines upwards from top to bottom.

Wherein, two adjacent side surfaces on the first forming section are respectively provided with a corresponding pinch roller.

Wherein, the part of the first forming section corresponding to the pinch roller sinks.

Compared with the prior art, the utility model discloses an useful part lies in: the utility model discloses a wrap up the tight setting with the plastic film at the forming part, thereby moving the in-process and exerting pressure the shaping wrapping bag that has three-dimensional form through the gyro wheel, the wrapping bag crease that adopts this structure to form is straight, and the appearance is neat.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the forming member of the present invention.

Fig. 3 is a schematic structural diagram of another embodiment of the first molding section according to the present invention.

Fig. 4 is a schematic structural view of the first molding section when the pressing wheel is provided.

Detailed Description

The present invention will be described in further detail below with reference to the accompanying drawings by way of specific embodiments.

As shown in fig. 1 and 4, the packaging bag forming structure of the present embodiment includes a forming member 1, a plastic film for manufacturing the packaging bag is coated on an outer surface of the forming member 1, the forming member 1 includes a first forming section 11 with a rectangular cross section, and a second forming section 12 connected to the first forming section 11, the second forming section 12 includes two inclined planes 121 which are oppositely disposed and extend toward a central axis direction of the forming member 1, and the two inclined planes 121 are connected by two inner concave planes 122 which are recessed toward the central axis direction of the forming member 1; the outer sides of the two concave surfaces 122 are respectively provided with a roller 3 which is arranged in a rolling way, and the outer edge of the roller 3 corresponds to the valley 120 of the concave surface 122. When the packaging bag is manufactured, the plastic film is tightly wrapped on the outer surface of the forming member 1, the plastic film moves from the first forming section 11 to the second forming section 12, and the plastic film conveying movement in the embodiment is completed by a traditional conveying mechanism, which is not described again. When the plastic film is in the first forming section 11, the first forming section 11 makes the plastic film be a rectangular tube-shaped structure, when the plastic film moves to the second forming section 12, because the two inclined planes 121 incline to the central axis direction, and the concave surface 122 is arranged between the two inclined planes 121, the roller 3 presses the plastic film to fall into the valley bottom 120, thereby forming the three-dimensional packaging bag. The packaging bag formed by adopting the structure is very straight and uniform in appearance.

In this embodiment, the number of the rollers 3 corresponding to the concave surfaces 122 on the same side is at least 2, and the rollers 3 are rotatably connected with the roller seat 31.

In this embodiment, a connecting rod perpendicular to the wheel seat 31 is further included.

In this embodiment, the valley bottom 120 of the concave surface 122 close to the first forming section 11 extends toward the central axis of the forming member 1 when extending away from the first forming section 11.

In this embodiment, the third forming section 13 connected to the second forming section 12, the third forming section 13 includes two flat surfaces 131, the two flat surfaces 131 are connected to the inclined surface 121, and the two flat surfaces 131 are connected by an inner concave surface 122'. The third forming section 13 in this embodiment is to change the neat bag in the second forming section 12 to the third forming section, so as to avoid the change of the shape of the plastic film after the plastic film is separated from the forming member 1. Preferably, in the present embodiment, the two planes 131 are arranged in parallel; the valleys 120 'of the two concave surfaces 122' are parallel to each other.

In this embodiment, the plastic film forming device further includes a pressing wheel 4 for pressing the plastic film against the first forming section 11, the pressing wheel 4 is rotatably disposed, specifically, the pressing wheel 4 is rotatably disposed on the wheel carrier 41, and the pressing wheel 4 is disposed at a boundary side of two adjacent side surfaces of the first forming section 11, that is, the pressing wheel 4 is located at a side of the side surface. The cross section of the first forming section 11 in this embodiment is rectangular, the plastic film is also rectangular after being coated on the first forming section 11, and the pinch roller 4 presses the plastic film on the side against the first forming section 11 to form a clear crease.

In this embodiment, a fixing plate 19 is disposed on a boundary line between two adjacent side surfaces of the first forming section 11, and the fixing plate 19 has an inclined surface that inclines upward from top to bottom. The shape-setting plate 19 in this case is convex with respect to the first profile section 11, and the plastic film in the stretched state is pressed again by the shape-setting plate 19 during the downward movement, forming a clear fold.

In this embodiment, two adjacent side surfaces of the first forming section 11 are respectively provided with a corresponding pressing wheel 4. Two press wheels 4 are adopted to form a balanced stress structure.

In this embodiment, the first forming section 11 sinks down at a position corresponding to the pressing wheel 4. That is, the side of the upper side of the first forming section 11 is depressed with respect to the reference surface of the first forming section 11, and has two regions not in the same horizontal plane, and the pinch roller 4 can form a more stable fold in the plastic film when pressing the plastic film in the regions.

The above description in this specification is only a distance description of the present invention. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. The packaging bag forming structure is characterized by comprising a forming part, wherein a plastic film for manufacturing the packaging bag is coated on the outer surface of the forming part, the forming part comprises a first forming section with a rectangular cross section and a second forming section connected with the first forming section, the second forming section comprises two inclined planes which are oppositely arranged and extend towards the central axis direction of the forming part, and the two inclined planes are connected by adopting two inner concave surfaces which are sunken towards the central axis direction of the forming part; and the outer sides of the two concave surfaces are respectively provided with a rolling wheel which is arranged in a rolling way, and the outer edge of the rolling wheel corresponds to the valley bottom of the concave surface.

2. The molding structure of packaging bag according to claim 1, wherein the number of rollers corresponding to the concave surfaces on the same side is at least 2, and the rollers are rotatably connected to the roller base.

3. The bag forming structure as claimed in claim 2, further comprising a connecting rod disposed perpendicular to the wheel base.

4. The bag forming structure of claim 1, wherein the valley in the concave surface adjacent the first forming section extends toward the central axis of the forming member as it extends away from the first forming section.

5. The bag forming structure as claimed in claim 1, wherein the third forming section is engaged with the second forming section, and the third forming section includes two flat surfaces engaged with the inclined surface, and the two flat surfaces are connected by the inner concave surface.

6. The bag forming structure as claimed in claim 5, wherein the two planes are parallel to each other; the valley bottoms of the two concave surfaces are arranged in parallel.

7. The bag forming structure as claimed in claim 1, further comprising a pressing roller for pressing the plastic film against the first forming section, wherein the pressing roller is rotatably disposed at a boundary side of two adjacent sides of the first forming section.

8. The structure of claim 7, wherein a shape-defining plate is provided on the first forming section at the boundary between the adjacent two sides, and the shape-defining plate has a slope that slopes upward and downward.

9. The bag forming structure as claimed in claim 7, wherein the first forming section has a corresponding pressing roller on each of two adjacent sides.

10. The bag forming structure as claimed in claim 7, wherein the first forming section is depressed at a portion corresponding to the pressing roller.