Packaging bag film blowing mechanism of film blowing machine

Abstract

The utility model relates to the technical field of film blowing machines, in particular to a packaging bag film blowing mechanism of a film blowing machine, which comprises a main body, a stand column, a baffle, a cavity and a circular ring, an annular runner for extruding materials is formed on the main body, an air duct is arranged in the center of the main body, the annular runner surrounds the air duct, and the stand column is vertically arranged on the main body. The baffle is installed on the main body and arranged in the circumferential direction of the annular runner, the baffle is used for abutting against the side face of a film to avoid excessive expansion of the film, the cavity is annularly installed on the stand column and located above the baffle, balls are embedded in the contact face of the cavity and the film and can rotate on the cavity to form a spherical pair with the cavity, and the circular ring is installed on the stand column and located above the cavity. A water absorption fabric layer is arranged on the contact face of the circular ring and the film, the wet balls are arranged to make contact with the film, it can be ensured that the film is fully cooled and hardened, scratches are prevented from being formed on the surface of the film, meanwhile, the wet balls are small in friction force, and the film can be protected from being damaged due to violent friction in the conveying process.

Description

TECHNICAL FIELD

[0001] The utility model relates to a blown film machine field especially is concerned with a blown film machine's packing bag blown film mechanism. BACKGROUND

[0002] The plastic film made by the blown film machine has the excellent performance such as tear resistance, waterproof, moisture resistance, weather resistance and plays a vital role in the production of plastic packing bag, the blown film machine is through the plastic particle heating melting, then through the extrusion, stretching etc. Processing technology is made into the film. This process involves multiple key steps, including the preparation of plastic raw material, heating melting, extruding into film, cooling and shaping and cutting.

[0003] The molten material is extruded from the runner to form a bubble, and then expands under the action of airflow to form a bagged film. At this time, the film surface is easy to be scratched and form scratches during the conveying process due to insufficient cooling and certain residual temperature. The purpose of the utility model is to provide a structure to solve the above technical problems and improve the appearance of the produced packing bag. UTILITY MODEL CONTENT

[0004] The utility model discloses a blown film machine's packing bag blown film mechanism to solve the problems mentioned in the background art.

[0005] To achieve the above object, the utility model provides the following technical scheme: including main part, stand, baffle, cavity and circular ring, the annular runner that the main part is formed with extruding material, the main part center is provided with the air cylinder, the annular runner surrounds the air cylinder, the air cylinder side is provided with the through -hole that passes through the airflow, the air cylinder is communicated with the outside air -blowing equipment through the air -blowing device of the main part side, the stand is vertically arranged on the main part bottom and is fixed with the main part, the baffle is installed on the main part and is arranged along the circumference of the annular runner, the baffle is used to resist the side of the film and avoid the film excessive expansion, the cavity is installed on the stand and is located above the baffle, the cavity is embedded with the ball bearing on the contact surface with the film, the ball bearing can rotate on the cavity and form a spherical pair with the cavity, the cavity outside is provided with the water inlet pipe, the air inlet pipe connected with the air -blowing equipment, water pump respectively, the circular ring is installed on the stand and is located above the cavity, and the circular ring is provided with the water -absorbing fabric layer on the contact surface with the film.

[0006] To optimize the above technical scheme, further measures are taken: the air cylinder is located at the center of the baffle, and the axis of the air cylinder coincides with the axis of the baffle, to ensure that the bubble extruded from the annular runner under the action of airflow can expand uniformly and fit the shape of the baffle.

[0007] As a further improvement of the above technical solution: still includes the moisture absorption sponge ring, the moisture absorption sponge ring is located in the cavity and is annular, the moisture absorption sponge ring is in contact with the ball, the purpose of the moisture absorption sponge layer is to avoid the water flow and air flow pumped by the water inlet pipe and air inlet pipe directly impacting the gap between the ball and the cavity, so as to avoid the water flow splashed from the gap between the ball and the cavity from perforating or damaging the film, and the purpose of the pumped air flow is to provide power to make the water flow seep from the gap between the ball and the cavity.

[0008] As a further improvement of the technical solution: still includes the ion wind rod, the ion wind rod is installed on the stand above the ring, and the purpose of the ion wind rod is to dry the water stains remaining on the film, and the positive and negative charges generated in the process can neutralize static electricity, so as to avoid the film adhering to the surface of the equipment under the action of static electricity and help to inhibit the wear phenomenon.

[0009] As an improvement of the foregoing technical solution: the ion wind rod is adjacent to the film and does not contact the film, and the purpose of the ion wind rod is to avoid the film being distorted and deformed due to the contact between the ion wind rod and the surface of the film.

[0010] From the above description of the structure of the utility model, compared with the prior art, the utility model has the following advantages:

[0011] The packaging bag film blowing mechanism of the film blowing machine provided by the utility model can ensure that the film is fully cooled and hardened by setting the wet ball in contact with the film, can avoid scratches on the surface of the film, and can protect the film from being damaged by severe friction in the conveying process due to the small friction of the wet ball. BRIEF DESCRIPTION OF DRAWINGS

[0012] The accompanying drawings, which form a part of this application, are intended to provide further understanding of the utility model and serve to explain the utility model together with the specification and are not intended to constitute an inappropriate limitation to the utility model. In the drawings:

[0013] Figure 1 is a three-dimensional structure schematic view of the utility model;

[0014] Figure 2 is a local cross-section structure schematic view of the utility model;

[0015] Figure 3 is Figure 2 is a local structure schematic view;

[0016] In the drawings: main body-1, annular flow channel-101, air duct-102, through hole-103, air nozzle-104, stand-2, baffle-3, cavity-4, ball-401, water inlet pipe-402, air inlet pipe-403, ring-5, water absorption fabric layer-501, moisture absorption sponge ring-6, ion wind rod-7 DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0018] Embodiments

[0019] Please refer to Figures 1-3 The utility model provides a kind of packaging bag film blowing mechanism of film blowing machine, including main body 1, stand 2, baffle 3, cavity 4, circular ring 5, hygroscopic sponge ring 6 and ion wind stick 7, annular runner 101 for material extrusion is formed on main body 1, the center of main body 1 is provided with wind cylinder 102, annular runner 101 surrounds wind cylinder 102, through-hole 103 for air flow to flow through is set in the side surface of wind cylinder 102, wind cylinder 102 is communicated with external air-blast equipment by the air outlet 104 of the side of main body 1.

[0020] Stand 2 is vertically arranged on the bottom end of main body 1 and is fixed with main body 1.

[0021] Baffle 3 is installed on main body 1 and is arranged along the circumference of annular runner 101, baffle 3 is used to resist thin film side to avoid excessive expansion of thin film, wind cylinder 102 is located at the center of baffle 3 and the axis of wind cylinder 102 coincides with the axis of baffle 3.

[0022] Cavity 4 is annularly installed on stand 2 and is located above baffle 3, ball 401 is embedded on the contact surface between cavity 4 and thin film, ball 401 can rotate on cavity 4 and form spherical pair with cavity 4, inlet pipe 402 and air inlet pipe 403 connected with air-blast equipment and water pump are respectively arranged on the outside of cavity 4.

[0023] Circular ring 5 is installed on stand 2 and is located above cavity 4, water-absorbing fabric layer 501 is arranged on the contact surface between circular ring 5 and thin film.

[0024] Ion wind stick 7 is installed on stand 2 and is located above circular ring 5, ion wind stick 7 is adjacent to thin film and does not contact with thin film.

[0025] Working principle: material is extruded from annular runner 101 to form bubble, air flow is sprayed from wind cylinder 102 and through-hole 103 on the side of through-hole 103, which can drive bubble to expand to form bagged thin film, and baffle 3 can limit bubble to avoid excessive expansion and rupture during the process.

[0026] When the film passes through the cavity 4, the air flow pumped from the air inlet pipe 403 and the water droplets pumped from the water inlet pipe 402 can act on the balls 401 to ensure that the surfaces of the balls 401 are kept wet, the wet balls 401 can cool the film to ensure that the film is sufficiently cooled and hardened, and meanwhile, the wet surfaces of the balls 401 have a small friction coefficient, so that the film surface can be prevented from being scratched.

[0027] After the film leaves the surface of the cavity 4, the film is conveyed to the circular ring 5, the water absorption fabric layer 501 on the inner side of the circular ring 5 can absorb the water stains attached to the film surface, then the water stains will be dried under the action of the ion wind rod 7, to ensure that the film is sufficiently dried, and meanwhile, the positive and negative charges generated by the ion wind rod 7 can also eliminate static electricity, so that the film is prevented from being tightly attached to the surface of a component under the action of static electricity to cause abrasion.

[0028] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A bag film blowing mechanism of a film blowing machine, characterized by comprising: The utility model relates to a kind of film blowing machine, including: Main body (1), annular flow channel (101) is formed on main body (1) for material extrusion, wind cylinder (102) is arranged in the center of main body (1), annular flow channel (101) surrounds wind cylinder (102), through-hole (103) for air flow to pass through is opened in the side of wind cylinder (102), wind cylinder (102) is communicated with external air-blast equipment by the air-blast nozzle (104) of the side of main body (1); Stand (2), stand (2) is vertically arranged on main body (1) upper end and is fixed with main body (1); Baffle (3), baffle (3) is installed on main body (1) and is arranged along annular flow channel (101) circumferentially, baffle (3) is used to resist thin film side and avoid thin film excessive expansion; Cavity (4), cavity (4) is installed on stand (2) and is located above baffle (3), ball (401) is embedded in the contact surface of cavity (4) and thin film, ball (401) can rotate on cavity (4) and form spherical pair with cavity (4), inlet pipe (402) and air inlet pipe (403) connected with air-blast equipment and water pump are respectively arranged outside cavity (4); Circular ring (5), circular ring (5) is installed on stand (2) and is located above cavity (4), water-absorbing fabric layer (501) is arranged on the contact surface of circular ring (5) and thin film.

2. A bag film blowing mechanism of a film blowing machine according to claim 1, characterized in that: Wind cylinder (102) is located in the center of baffle (3), and the axis of wind cylinder (102) coincides with the axis of baffle (3).

3. A bag film blowing mechanism of a film blowing machine according to claim 1, characterized in that: It also includes moisture-absorbing sponge ring (6), which is annular in cavity (4), and is in contact with ball (401).

4. A bag film blowing mechanism of a film blowing machine according to any one of claims 1 to 3, characterized in that: It also includes ion wind stick (7), which is installed on stand (2) and is located above circular ring (5).

5. A bag film blowing mechanism of a film blowing machine according to claim 4, characterized in that: Ion wind stick (7) is adjacent to the film and does not contact the film.

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