Pre-drying mechanism for plastic film

Abstract

The utility model discloses a plastic film pre-drying mechanism which comprises a drying box, film conveying holes are formed in the left side face and the right side face of the drying box, a hot air box is arranged at the rear end of the drying box, and the plastic film pre-drying mechanism further comprises a guide mechanism. The guiding mechanism comprises an upper adjusting plate, a first guiding column, a lower adjusting plate and a second guiding column, the upper adjusting plate is slidably connected to the upper end of the interior of the drying box, the lower end of the upper adjusting plate is rotationally connected with the first guiding column through a first rotating shaft, and the lower adjusting plate is slidably connected to the lower end of the interior of the drying box; according to the pre-drying mechanism for the plastic film, the plastic film is guided to move in the drying box along a snakelike track, the length of the snakelike track of the plastic film is adjustable, the conveying speed of the plastic film is not changed, meanwhile, the conveying speed of the plastic film is not changed, and meanwhile the conveying efficiency of the plastic film is improved. The pre-drying time of the plastic film can be conveniently prolonged according to needs, and the pre-drying effect of the plastic film is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to food packaging film technical field, concretely is a kind of pre-drying mechanism of plastic film. BACKGROUND

[0002] Food packaging film is a kind of film for wrapping food, the main purpose is to isolate microbial bacteria and extraneous contaminants, prevent and prolong food metamorphic, it is composed of plastic, paper and biodegradable material etc., with higher strength and anti-permeability, can effectively protect food from pollution and spoilage of external environment, wherein plastic film is one of common types of food packaging film, in plastic film production, in order to guarantee the quality of plastic film, before being rolled up to plastic film, it needs to use drying mechanism to pre-dry plastic film, avoid the influence of moisture on the quality of plastic film;In prior art, hot air drying method is a common plastic film drying method, in the conveying process of plastic film, hot air is used to blow the upper and lower surfaces of plastic film, and plastic film can be quickly and cleanly dried, but according to the different material of plastic film, the time required for drying is different, and the conveying speed of traditional plastic film is adjusted to adjust the drying time, but it will increase the time required for plastic film rolling, and affect the production efficiency of plastic film. UTILITARIAN CONTENT

[0003] The utility model solves the technical problem of overcoming the defects of the prior art, provides a kind of pre-drying mechanism of plastic film, guide plastic film to move along the serpentine trajectory in drying box, the serpentine trajectory length of plastic film is adjustable, without changing the conveying speed of plastic film, it is convenient to extend the pre-drying time of plastic film as required, improve the pre-drying effect of plastic film, and effectively solve the problems in the background art.

[0004] To achieve the above object, the utility model provides the following technical scheme: a kind of pre-drying mechanism of plastic film, including drying box, the left and right side of the drying box is equipped with film conveying hole, the rear end of drying box is equipped with hot air box, still include guiding mechanism;

[0005] Guiding mechanism: it includes upper adjusting plate, guide column one, lower adjusting plate and guide column two, the upper adjusting plate is slidably connected to the inner upper end of drying box, the lower end of upper adjusting plate is rotatably connected with guide column one by pivot one respectively, the lower adjusting plate is slidably connected to the inner lower end of drying box, the upper end of lower adjusting plate is rotatably connected with guide column two by pivot two respectively, guide column one and guide column two are transversely spaced distribution, guide plastic film to move along the serpentine trajectory in drying box, the serpentine trajectory length of plastic film is adjustable, without changing the conveying speed of plastic film, it is convenient to extend the pre-drying time of plastic film as required, improve the pre-drying effect of plastic film.

[0006] Further, the upper surface of the drying box is provided with a single-chip microcomputer, the input end of the single-chip microcomputer is electrically connected to an external power supply, and the starting and stopping of the whole device are controlled.

[0007] Further, the guide mechanism further comprises sealing rubber pads, the sealing rubber pads are arranged at the left and right ends of the upper adjusting plate and the lower adjusting plate respectively, and the sealing rubber pads are attached to the inner walls of the drying box to seal the left and right sides of the upper adjusting plate and the lower adjusting plate and the inner walls of the drying box.

[0008] Further, the guide mechanism further comprises elastic rubber pads, the elastic rubber pads are arranged at the front and rear ends of the upper adjusting plate and the lower adjusting plate respectively, and the other ends of the elastic rubber pads are fixedly connected to the inner walls of the drying box to guide the hot air.

[0009] Further, the support columns are rotatably connected between the front and rear inner walls of the film conveying hole through shafts, and the support columns provide support for the left and right ends of the plastic film.

[0010] Further, the screw rods are rotatably connected between the upper and lower inner walls of the drying box, the thread directions of the upper and lower ends of the screw rods are opposite, the screw holes in the surfaces of the upper adjusting plate and the lower adjusting plate are threadedly connected with the adjacent screw rods, the upper ends of the drying box are respectively provided with motors, the lower ends of the output shafts of the motors are fixedly connected with the adjacent screw rods, and the input ends of the motors are electrically connected to the output end of the single-chip microcomputer to provide power for the movement of the upper adjusting plate and the lower adjusting plate.

[0011] Further, the electric heating pipes are arranged at the front ends of the hot air boxes, the electric fans are arranged at the rear ends of the hot air boxes, and the input ends of the electric heating pipes and the electric fans are electrically connected to the output end of the single-chip microcomputer to provide hot air for the pre-drying of the plastic film.

[0012] Compared with the prior art, the pre-drying mechanism for the plastic film has the following advantages.

[0013] The plastic film is guided to move along a snakelike track in the drying box, the length of the snakelike track of the plastic film is adjustable, the pre-drying time of the plastic film can be prolonged according to the need without changing the conveying speed of the plastic film, and the pre-drying effect of the plastic film is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is a structural schematic view of the whole device of the utility model;

[0015] Fig. 2 It is a structural schematic view of the whole device of the utility model in a side view section;

[0016] Fig. 3 It is a structural schematic view of the whole device of the utility model in a front view section.

[0017] In the figure: 1 drying box, 2 hot air box, 3 film conveying hole, 4 guide mechanism, 41 upper adjusting plate, 42 guide column one, 43 lower adjusting plate, 44 guide column two, 45 sealing rubber pad, 46 elastic rubber pad, 5 support column, 6 screw rod, 7 motor, 8 electric heating tube, 9 electric fan, 10 single-chip microcomputer. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0019] Please refer to Figs. 1-3 The embodiment provides a technical scheme: a pre-drying mechanism for plastic film, which comprises a drying box 1, which provides space for pre-drying of the plastic film. The left and right sides of the drying box 1 are each provided with a film conveying hole 3, which facilitates the plastic film to pass through the inside of the drying box 1. The rear end of the drying box 1 is provided with a hot air box 2, which provides hot air for pre-drying of the plastic film. The upper surface of the drying box 1 is provided with a single-chip microcomputer 10, the input end of which is electrically connected to an external power supply, to control the start and stop of the device. The front and rear inner walls of the film conveying hole 3 are each connected to a support column 5 through a rotating shaft, to provide support for the left and right ends of the plastic film. The inside of the front end of the hot air box 2 is provided with an electric heating tube 8, to heat the air. The inside of the rear end of the hot air box 2 is provided with an electric fan 9, to send hot air into the inside of the drying box 1. The input ends of the electric heating tube 8 and the electric fan 9 are each electrically connected to the output end of the single-chip microcomputer 10. The pre-drying mechanism further comprises a guide mechanism 4.

[0020] The guiding mechanism 4 comprises an upper adjusting plate 41, guiding columns one 42, a lower adjusting plate 43 and guiding columns two 44. The upper adjusting plate 41 is slidingly connected to the upper end of the inside of the drying box 1. The lower end of the upper adjusting plate 41 is rotatably connected with the guiding columns one 42 through rotating shafts one respectively. The lower adjusting plate 43 is slidingly connected to the lower end of the inside of the drying box 1. The upper end of the lower adjusting plate 43 is rotatably connected with the guiding columns two 44 through rotating shafts two respectively. The guiding columns one 42 and the guiding columns two 44 are transversely and spacedly distributed. The plastic film passes through two film conveying holes 3 during conveying. At this time, the guiding columns one 42 are located at the lower side of the guiding columns two 44. The film conveying holes 3 are located between the guiding columns one 42 and the guiding columns two 44. By relatively separating the upper adjusting plate 41 and the lower adjusting plate 43, the guiding columns one 42 move upward and the guiding columns two 44 move downward, guiding the plastic film to be conveyed along a serpentine trajectory between the upper adjusting plate 41 and the lower adjusting plate 43, increasing the length of the plastic film in the drying box 1. According to the different distance between the upper adjusting plate 41 and the lower adjusting plate 43, the length of the serpentine trajectory of the plastic film is adjusted, and the pre-drying time of the plastic film is changed. The guiding mechanism 4 further comprises sealing rubber pads 45. The sealing rubber pads 45 are respectively arranged at the left and right ends of the upper adjusting plate 41 and the lower adjusting plate 43. The sealing rubber pads 45 are attached to the inner wall of the drying box 1, sealing the left and right sides of the upper adjusting plate 41 and the lower adjusting plate 43 and the inner wall of the drying box 1, blocking the leakage of hot air to the upper and lower ends of the drying box 1. The guiding mechanism 4 further comprises elastic rubber pads 46. The elastic rubber pads 46 are respectively arranged at the front and rear ends of the upper adjusting plate 41 and the lower adjusting plate 43. The other ends of the elastic rubber pads 46 are fixedly connected with the inner wall of the drying box 1. During the upward and downward movement of the upper adjusting plate 41 and the lower adjusting plate 43, the elastic rubber pads 46 are deformed, guiding the hot air to accurately enter between the upper adjusting plate 41 and the lower adjusting plate 43. Screws 6 are rotatably connected between the upper and lower inner walls of the drying box 1. The thread directions of the upper and lower ends of the screws 6 are opposite. The screw holes on the surfaces of the upper adjusting plate 41 and the lower adjusting plate 43 are respectively threadedly connected with the adjacent screws 6. Motors 7 are arranged at the upper end of the drying box 1 respectively. The lower ends of the output shafts of the motors 7 are fixedly connected with the adjacent screws 6 respectively. The input ends of the motors 7 are electrically connected with the output end of the single-chip microcomputer 10. When the motors 7 are started, the output shafts of the motors 7 drive the screws 6 to rotate. Through the thread connection between the screws 6 and the screw holes on the surfaces of the upper adjusting plate 41 and the lower adjusting plate 43, the upper adjusting plate 41 and the lower adjusting plate 43 are driven to move upward and downward respectively under the influence of the opposite thread directions of the upper and lower ends of the screws 6. The moving directions of the upper adjusting plate 41 and the lower adjusting plate 43 are opposite.

[0021] The working principle of the pre-drying mechanism of the plastic film is as follows: when the plastic film is rolled up, the plastic film passes through two film conveying holes 3 in the conveying process, at this time the guide column one 42 is located at the lower side of the guide column two 44, the film conveying hole 3 is located between the guide column one 42 and the guide column two 44, then the single-chip microcomputer 10 starts the motor 7, the output shaft of the motor 7 drives the screw rod 6 to rotate, the screw rod 6 is screw-threadedly connected with the screw holes on the surfaces of the upper adjusting plate 41 and the lower adjusting plate 43, under the influence of the opposite screw thread directions of the upper and lower ends of the screw rod 6, the upper adjusting plate 41 and the lower adjusting plate 43 are relatively separated, the guide column one 42 moves upwards, the guide column two 44 moves downwards, and the plastic film is guided to be conveyed along a serpentine trajectory between the upper adjusting plate 41 and the lower adjusting plate 43, then the heating tube 8 and the electric fan 9 are started to heat air and guide hot air into the inside of the drying box 1, under the guidance of the elastic rubber pad 46, the hot air accurately enters between the upper adjusting plate 41 and the lower adjusting plate 43, the hot air contacts the plastic film along the serpentine trajectory, and the plastic film is pre-dried, according to the different distances between the upper adjusting plate 41 and the lower adjusting plate 43, the length of the serpentine trajectory of the plastic film is adjusted, and the pre-drying time of the plastic film is changed.

[0022] It is worth noting that the single-chip microcomputer 10 disclosed in the above embodiment can be selected as a PIC16F1823-I / P type single-chip microcomputer, the motor 7, the heating tube 8 and the electric fan 9 can be freely configured according to actual application scenarios, the motor 7 can be selected as a 3M57-42A type stepping motor, the heating tube 8 can be selected as a 306 type heating tube, and the electric fan 9 can be selected as a 6028 type guide fan, and the single-chip microcomputer 10 controls the motor 7, the heating tube 8 and the electric fan 9 to work by using a method commonly used in the prior art.

[0023] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process conversion by using the contents of the utility model specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection range of the utility model.

Claims

1. A pre-drying mechanism for plastic film, comprising a drying box (1), film conveying holes (3) are arranged on the left and right sides of the drying box (1), and a hot air box (2) is arranged at the rear end of the drying box (1), characterized in that: It also includes a guide mechanism (4); The guide mechanism (4) comprises an upper adjusting plate (41), guide posts one (42), a lower adjusting plate (43) and guide posts two (44). The upper adjusting plate (41) is slidingly connected to the upper end of the inside of the drying box (1). The lower end of the upper adjusting plate (41) is rotatably connected with the guide posts one (42) through rotating shafts one. The lower adjusting plate (43) is slidingly connected to the lower end of the inside of the drying box (1). The upper end of the lower adjusting plate (43) is rotatably connected with the guide posts two (44) through rotating shafts two. The guide posts one (42) and the guide posts two (44) are transversely and spacedly distributed.

2. The pre-baking mechanism of claim 1, wherein: The upper surface of the drying box (1) is provided with a single-chip microcomputer (10), and the input end of the single-chip microcomputer (10) is electrically connected to an external power source.

3. The pre-baking mechanism of claim 1, wherein: The guide mechanism (4) further comprises sealing rubber pads (45), which are arranged at the left and right ends of the upper adjusting plate (41) and the lower adjusting plate (43), respectively. The sealing rubber pads (45) are attached to the inner walls of the drying box (1).

4. The prebaking mechanism of claim 1, wherein: The guide mechanism (4) further comprises elastic rubber pads (46), which are arranged at the front and rear ends of the upper adjusting plate (41) and the lower adjusting plate (43), respectively. The other ends of the elastic rubber pads (46) are fixedly connected to the inner walls of the drying box (1).

5. The prebaking mechanism of claim 1, wherein: The front and rear inner walls of the film conveying hole (3) are rotatably connected with support posts (5) through rotating shafts three.

6. The prebaking mechanism of claim 2, wherein: The upper and lower inner walls of the drying box (1) are rotatably connected with screw rods (6). The screw threads at the upper and lower ends of the screw rods (6) are opposite in direction. The screw holes on the surfaces of the upper adjusting plate (41) and the lower adjusting plate (43) are threadedly connected with the adjacent screw rods (6), respectively. The upper end of the drying box (1) is provided with a motor (7), and the lower end of the output shaft of the motor (7) is fixedly connected with the adjacent screw rod (6). The input end of the motor (7) is electrically connected to the output end of the single-chip microcomputer (10).

7. The prebaking mechanism of claim 2, wherein: The front end of the inside of the hot air box (2) is provided with an electric heating tube (8), and the rear end of the inside of the hot air box (2) is provided with an electric fan (9). The input ends of the electric heating tube (8) and the electric fan (9) are electrically connected to the output end of the single-chip microcomputer (10).

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