Film laminating device for kraft paper bag production

Abstract

The utility model belongs to the field of film covering devices, and particularly relates to a film covering device for kraft paper bag production, which comprises a shell and a film covering mechanism, the shell is provided with an inner cavity, the film covering mechanism comprises a coating mechanism and a tensioning mechanism, the coating mechanism comprises an air cylinder fixed at the top of the shell, and the tensioning mechanism is fixed at the top of the shell. The moving end of the air cylinder penetrates through the top of the shell, extends into the inner cavity and then is fixedly connected with a connecting frame, and the bottom of the connecting frame is fixedly connected with a glue storage box. Through cooperation of the stirring assembly and the coating roller, during use, along with rolling of dried kraft paper, rotation is driven by rolling of the kraft paper, then stirring blades rotate to conduct synchronous stirring treatment on glue in a glue storage box, and the layering phenomenon of the glue after standing in the glue storage box is effectively avoided; the glue components are fully mixed under the stirring action, so that the uniformity and stability of the glue are ensured, the laminating quality is improved, additional manual or electric driving is not needed, automatic stirring is realized, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of film laminating devices, in particular to a film laminating device for producing kraft paper bags. Background Art

[0002] Kraft paper typically retains its natural yellow-brown color and offers high strength. It's widely used in a variety of packaging products, including paper bags, tote bags, color boxes, and gift boxes. During the kraft paper tote bag production process, the surface of the kraft paper is coated with glue and covered with a transparent plastic film before being rolled up. This laminating process requires the use of a laminating device. A Chinese utility model patent (Announcement No. CN220075764U) discloses a laminating device for kraft paper bag production. This device dries the kraft paper and protective film during transport, simplifying the process and enabling the lamination of kraft paper and film of varying thicknesses. This improves efficiency by keeping the kraft paper and protective film consistently taut, allowing for evenly applied glue to the kraft paper, resulting in a smoother lamination and enhanced production quality.

[0003] However, the above device still has some shortcomings when used: the glue in the glue storage box is prone to stratification after standing still, and the different components in the glue are separated due to density differences, which affects the uniformity and use effect of the glue. This will not only reduce the laminating quality, but may also have an adverse effect on the subsequent processing and use of kraft paper bags. Therefore, a laminating device for kraft paper bag production is proposed to address the above situation. Utility Model Content

[0004] In order to overcome the problem that the prior art glue is prone to stratification after being left to stand, which affects the uniformity and use effect of the glue, the utility model proposes a laminating device for producing kraft paper bags.

[0005] The utility model solves the technical problem by adopting the following technical solution: a film laminating device for producing kraft paper bags, comprising a shell and a film laminating mechanism, wherein the shell has an inner cavity, and the film laminating mechanism comprises a coating mechanism and a tensioning mechanism.

[0006] The coating mechanism includes a cylinder fixed on the top of the shell, the movable end of the cylinder passes through the top of the shell and extends into the inner cavity and is fixedly connected to a connecting frame, the bottom of the connecting frame is fixedly connected to a glue storage box, the glue storage box has a material storage cavity, the bottom of the glue storage box is rotatably connected to a coating roller, the top of the glue storage box is equidistantly provided with a plurality of through holes, the cylinder also has a cavity, and an air outlet is provided on one side of the outer wall of the cylinder, and the air outlet is connected to the cavity.

[0007] The coating mechanism further includes a stirring component, the stirring component includes a perforated plate, there are two perforated plates, the two perforated plates are respectively fixed at both ends of the top of the glue storage box, a rotating shaft is rotatably connected to the two perforated plates, and a plurality of driving bevel gears are in interference fit at equal intervals on the rotating shaft.

[0008] The stirring component further includes stirring rods, there are multiple stirring rods, each stirring rod is rotatably fitted with a through hole respectively, a driven bevel gear is fixed at the top of each stirring rod, the driven bevel gear meshes with the driving bevel gear, and a stirring blade is fixed at one end of the stirring rod penetrating into the material storage cavity of the glue storage box.

[0009] The stirring component further includes connecting shafts, there are two connecting shafts, one connecting shaft is fixedly connected to one end of the rotating shaft, the other connecting shaft is fixedly connected to the end of the coating roller, pulley wheels are in interference fit on the two connecting shafts, and a belt is sleeved on the two pulley wheels.

[0010] A drying component is arranged on the housing, a branch pipe is arranged on the drying component, and one end of the branch pipe penetrating into the inner cavity extends into the cavity.

[0011] Preferably, both ends of the housing have openings, the openings are communicated with the inner cavity, a roller conveyor is arranged on the bottom surface of the inner wall of the inner cavity, and both ends of the roller conveyor pass through the openings and extend out of the inner cavity.

[0012] Preferably, the shape of the connecting frame is an inverted "U" shape.

[0013] Preferably, a hollowing hole is opened on the top of the housing, the hollowing hole is communicated with the inner cavity, and the moving end of the air cylinder is in clearance fit with the hollowing hole.

[0014] Preferably, the glue storage box is made of a heat-conducting metal material, an assembly hole is provided on one side of the outer wall of the glue storage box, and the assembly hole is in interference fit with the branch pipe.

[0015] Preferably, a through hole is provided on the top of the glue storage box, a glue injection pipe is in interference fit in the through hole, and a sealing cover is arranged on the glue injection pipe. ​​​​​

[0018] The utility model is beneficial in that:

[0019] 1. The present invention cooperates with the coating roller. When in use, as the dried kraft paper is rolled up, the rolling of the kraft paper drives the rotation, which in turn causes the stirring blade to rotate and synchronously stir the glue in the glue storage box. This effectively avoids the stratification of the glue after it has been left standing in the glue storage box. The glue components are fully mixed under the stirring action, ensuring the uniformity and stability of the glue, thereby improving the quality of the film coating. At the same time, no additional manual or electric drive is required, achieving automatic stirring and reducing production costs.

[0020] 2. Through the structural design of the cavity, air outlet and branch pipe, the utility model can deliver hot air into the cavity during the drying operation, thereby heating the glue storage box, improving the fluidity of the glue inside the glue storage box, and cooperating with the work of the stirring blade to further improve the mixing quality of the glue. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a structural schematic diagram of the laminating device;

[0023] Figure 2 Schematic diagram of the internal structure of the laminating device;

[0024] Figure 3 It is a schematic diagram of the assembly structure of the coating mechanism and the drying component;

[0025] Figure 4 Schematic diagram of the structure of the stirring component;

[0026] In the figure: 1. Shell; 101. Inner cavity; 102. Roller conveyor; 2. Cylinder; 201. Connecting frame; 202. Glue storage box; 2020. Through hole; 2021. Cavity; 2022. Air outlet; 203. Coating roller; 204. Stirring assembly; 2040. Orifice plate; 2041. Rotating shaft; 2042. Driving bevel gear; 2043. Stirring rod; 2044. Driven bevel gear; 2045. Stirring blade; 2046. Connecting shaft; 2047. Pulley; 2048. Belt; 3. Drying assembly; 301. Branch pipe. DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] The following is combined with Figure 1 —4 further details of this application,

[0029] The present application discloses a laminating device for producing kraft paper bags. Figure 1 、 Figure 2 、 Figure 3 and Figure 4 A laminating device for producing kraft paper bags includes a shell 1 and a laminating mechanism. The shell 1 has an inner cavity 101. The laminating mechanism includes a coating mechanism and a tensioning mechanism.

[0030] One side of the housing 1 is provided with an observation window, and the other side of the housing 1 is hinged with a door.

[0031] Among them, the tensioning mechanism is arranged on the bottom surface inside the inner cavity 101 and is on the same vertical plane as the coating mechanism. The composition structure of the tensioning mechanism is the same as the composition structure of the tensioning component in the prior art (Announcement No.: CN220075764U), which will not be elaborated here.

[0032] The laminating principle of the kraft paper by the laminating device is the same as that of the above-mentioned prior art, and will not be described in detail here.

[0033] The coating mechanism includes a cylinder 2 fixed on the top of the shell 1. The movable end of the cylinder 2 passes through the top of the shell 1 and extends into the inner cavity 101 and is fixedly connected to a connecting frame 201. The bottom of the connecting frame 201 is fixedly connected to a glue storage box 202. The glue storage box 202 has a material storage cavity. The bottom of the glue storage box 202 is rotatably connected to a coating roller 203. A plurality of through holes 2020 are equidistantly provided on the top of the glue storage box 202. The cylinder 2 also has a cavity 2021. An air outlet 2022 is provided on one side of the outer wall of the cylinder 2, and the air outlet 2022 is connected to the cavity 2021.

[0034] In order to increase the residence time of the hot air in the cavity 2021, baffles may be staggeredly arranged in the cavity 2021 to reduce the flow rate of the hot air.

[0035] The coating mechanism further includes a stirring component 204. The stirring component 204 includes a perforated plate 2040. There are two perforated plates 2040, and the two perforated plates 2040 are respectively fixed at both ends of the top of the glue storage box 202. A rotating shaft 2041 is rotatably connected to the two perforated plates 2040, and a plurality of driving bevel gears 2042 are in interference fit at equal intervals on the rotating shaft 2041.

[0036] The stirring component 204 further includes stirring rods 2043. There are multiple stirring rods 2043, and each stirring rod 2043 is rotatably fitted with the through hole 2020 respectively. A driven bevel gear 2044 is fixed at the top of each stirring rod 2043. The driven bevel gear 2044 meshes with the driving bevel gear 2042. A stirring blade 2045 is fixed at one end of the stirring rod 2043 penetrating into the material storage cavity of the glue storage box 202.

[0037] The stirring component 204 further includes connecting shafts 2046. There are two connecting shafts 2046. One connecting shaft 2046 is fixedly connected to one end of the rotating shaft 2041, and the other connecting shaft 2046 is fixedly connected to the end of the coating roller 203. Pulley wheels 2047 are in interference fit on the two connecting shafts 2046, and a belt 2048 is sleeved on the two pulley wheels 2047.

[0038] A drying component 3 is provided on the housing 1. A branch pipe 301 is provided on the drying component 3, and one end of the branch pipe 301 penetrating into the inner cavity 101 extends into the cavity 2021.

[0039] Refer to Figure 1 and Figure 2 , both ends of the housing 1 have openings, the openings are communicated with the inner cavity 101, a roller conveyor 102 is provided on the bottom surface of the inner wall of the inner cavity 101, and both ends of the roller conveyor 102 pass through the openings and extend out of the inner cavity 101.

[0040] Among them, the roller conveyor 102 is used to convey the kraft paper box protective film into and out of the inner cavity 101. In actual use, a winding device is provided on one side of the housing 1 for winding the processed kraft paper.

[0041] Refer to Figure 3 , the shape of the connecting frame 201 is an inverted "U".

[0042] Among them, the connecting frame 201 designed in an inverted "U" shape is for facilitating the assembly of the rotating shaft 2041, the driving bevel gear 2042 and the driven bevel gear 2044.

[0043] Refer to Figure 1 , Figure 2 and Figure 3 , a hollow hole is opened at the top of the housing 1, the hollow hole is communicated with the inner cavity 101, and the moving end of the cylinder 2 is in clearance fit with the hollow hole.

[0044] The hollow hole is provided as a movable channel for the moving end of the cylinder 2.

[0045] Reference Figure 3 The glue storage box 202 is made of a heat-conducting metal material. One side of the outer wall of the glue storage box 202 has an assembly hole, and the assembly hole is interference-fitted with the branch pipe 301.

[0046] Among them, the hot air entering the branch pipe 301 will enter the cavity 2021. Since the material making the glue storage box 202 has thermal conductivity, it can absorb a certain amount of heat, which has an insulating effect on the glue inside it, and at the same time cooperates with the stirring process to improve fluidity.

[0047] Reference Figure 3 The top of the glue storage box 202 has a through hole, a glue injection tube is interference fit in the through hole, and a sealing cover is provided on the glue injection tube.

[0048] Among them, after opening the sealing cover, glue can be injected into the glue injection tube to complete the addition of glue.

[0049] Reference Figure 1 and Figure 3 The drying component 3 includes a bellows arranged on the top of the shell 1, the bellows has an air inlet, a heating chamber and a fan inside the bellows, an electric heating wire inside the heating chamber, an air outlet pipe of the fan is connected to the heating chamber, and an exhaust pipe is connected to the other side of the heating chamber. The exhaust pipe penetrates into the inner cavity 101 and is connected to an exhaust hood, which is fixed on one side of the inner wall of the inner cavity 101. The exhaust hood has an exhaust port, and the exhaust port faces one side of the coating roller 203.

[0050] When in use, the power and switch of the electric heating wire and the fan are turned on, the electric heating wire works to heat the heating chamber, the fan transports the heat into the heating chamber for heating, and then transports it to the exhaust hood through the exhaust pipe, and then discharged from the exhaust hood to dry the coated kraft paper.

[0051] Reference Figure 3 The exhaust pipe is connected to a branch pipe 301, which is a rubber hose.

[0052] The rubber hose is provided to ensure that when the glue storage box 202 descends, the branch pipe 301 can follow the glue storage box 202 and the length of the branch pipe 301 should be adapted to the distance the glue storage box 202 descends.

[0053] Working principle: When in use, a winding device is set on one side of the shell 1, and the processed kraft paper is wound on the winding roller. The winding roller is driven by the motor to rotate to complete the winding process. At the same time, when the kraft paper in the winding operation moves on the roller conveyor 102, it will drive the coating roller 203 to rotate. The rotation of the coating roller 203 will cause the connecting shaft 2046 to rotate synchronously. Under the transmission action of the belt 2048, the rotating shaft 2041 rotates, and the rotation of the rotating shaft 2041 causes the driving bevel gear 2042 to rotate. Since the driving bevel gear 2042 is engaged with the driven bevel gear 2044, the driven bevel gear 2044 rotates. The rotation of the driven bevel gear 2044 drives the stirring rod 2043 to rotate, and then the stirring blade 2045 stirs the glue in the glue storage box 202.

[0054] At the same time, when the drying component 3 is working to dry the coated kraft paper, the hot air will be transported to the cavity 2021 through the branch pipe 301, and then discharged from the air outlet 2022. Through continuous hot air input, the fluidity of the glue inside the glue storage box 202 can be improved, and the stirring and mixing effect can be improved.

[0055] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. A film laminating device for producing kraft paper bags, comprising a housing (1), the housing (1) having an inner cavity (101), characterized in that: It also includes a film coating mechanism, which includes a coating mechanism and a tensioning mechanism. The coating mechanism includes a cylinder (2) fixed to the top of the housing (1). The moving end of the cylinder (2) passes through the top of the housing (1) and extends into the inner cavity (101) and is fixedly connected to a connecting frame (201). A glue storage box (202) is fixedly connected to the bottom of the connecting frame (201). The glue storage box (202) has a material storage cavity. A coating roller (203) is rotatably connected to the bottom of the glue storage box (202). A plurality of through holes (2020) are equidistantly arranged on the top of the glue storage box (202). The cylinder (2) also has a cavity (2021). An air outlet (2022) is arranged on one side of the outer wall of the cylinder (2), and the air outlet (2022) is communicated with the cavity (2021); The coating mechanism further includes a stirring component (204). The stirring component (204) includes a hole plate (2040). There are two hole plates (2040), and the two hole plates (2040) are respectively fixed to both ends of the top of the glue storage box (202). A rotating shaft (2041) is rotatably connected to the two hole plates (2040). A plurality of driving bevel gears (2042) are in interference fit on the rotating shaft (2041) at equal intervals; The stirring component (204) further includes stirring rods (2043). There are multiple stirring rods (2043), and each stirring rod (2043) is rotatably fitted with the through hole (2020). A driven bevel gear (2044) is fixed to the top of each stirring rod (2043). The driven bevel gear (2), and a stirring blade (2045) is fixed to one end of the stirring rod (2043) penetrating into the material storage cavity of the glue storage box (202); The stirring component (204) further includes connecting shafts (2046). There are two connecting shafts (2046). One connecting shaft (2046) is fixedly connected to one end of the rotating shaft (2041), and the other connecting shaft (2046) is fixedly connected to the end of the coating roller (203). Pulley wheels (2047) are in interference fit on the two connecting shafts (2046), and a belt (2048) is sleeved on the two pulley wheels (2047); A drying component (3) is arranged on the housing (1). A branch pipeline (301) is arranged on the drying component (3), and one end of the branch pipeline (301) penetrating into the inner cavity (101) extends into the cavity (2021).

2. The laminating device for producing kraft paper bags according to claim 1, characterized in that: Both ends of the housing (1) have openings, and the openings are communicated with the inner cavity (101). A roller conveyor (102) is arranged on the bottom surface of the inner wall of the inner cavity (101), and both ends of the roller conveyor (102) pass through the openings and extend outside the inner cavity (101).

3. The laminating device for producing kraft paper bags according to claim 1, characterized in that: The shape of the connecting frame (201) is an inverted "U".

4. The laminating device for producing kraft paper bags according to claim 2, characterized in that: A hollow hole is arranged on the top of the housing (1), and the hollow hole is communicated with the inner cavity (101). The moving end of the cylinder (2) is in clearance fit with the hollow hole.

5. The film laminating device for producing kraft paper bags according to claim 1, characterized in that: The glue storage box (202) is made of a heat-conducting metal material, and one side of the outer wall of the glue storage box (202) is provided with an assembly hole, and the assembly hole is interference-fitted with the branch pipe (301).

6. The laminating device for producing kraft paper bags according to claim 5, characterized in that: The top of the glue storage box (202) is provided with a through hole, a glue injection tube is interference-fitted in the through hole, and a sealing cover is provided on the glue injection tube.

7. The laminating device for producing kraft paper bags according to claim 1, characterized in that: The drying assembly (3) includes a bellows arranged on the top of the shell (1), the bellows having an air inlet, a heating chamber and a fan in the bellows, an electric heating wire in the heating chamber, an air outlet pipe of the fan connected to the heating chamber, an exhaust pipe connected to the other side of the heating chamber, the exhaust pipe penetrates into the inner cavity (101) and is connected to an exhaust hood, the exhaust hood is fixed to one side of the inner wall of the inner cavity (101), the exhaust hood has an exhaust port, and the exhaust port faces one side of the coating roller (203).

8. The film laminating device for producing kraft paper bags according to claim 7, characterized in that: The exhaust pipe is connected to a branch pipe (301), and the branch pipe (301) is a rubber hose.

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