Film blowing device convenient to clean

Abstract

The utility model discloses a film blowing device convenient to clean, which comprises a film blowing seat, an air suction pipe and a scraping mechanism, the air suction pipe is vertically arranged in the middle of the top end of the film blowing seat, penetrates through the film blowing seat downwards and then is communicated with an exhaust fan, and the top end of the film blowing seat is sequentially provided with an inner blowing groove, a film blowing groove and an outer blowing groove from inside to outside. The scraping mechanism comprises an annular mounting block arranged at the edge of the top end of the film blowing seat, an annular hollow cavity is formed in the annular mounting block, an annular through hole communicating with the annular hollow cavity is formed in the inner side wall of the annular mounting block, an annular rotating block is movably arranged in the annular hollow cavity, and a plurality of first teeth are circumferentially arranged on the outer side wall of the annular rotating block; a supporting plate penetrating through the annular through hole is arranged on the inner side wall of the annular rotating block, one end of the supporting plate is rotationally connected with one end of a scraper, and a scraper assembly is arranged at the other end of the scraper. The scraping plate is driven by the annular rotating block to rotate, and the scraper assembly at the bottom end of the scraping plate can scrape off excess materials at the film blowing groove.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic film blowing machines, in particular to a film blowing device which is easy to clean. Background Art

[0002] The film blowing machine is a device used to produce plastic film. During the production process, the plastic melt is extruded upward from the circular extrusion port to form a film bubble. The film bubble is pulled upward continuously, and the cooling mechanism continuously blows out cooling air to cool the film bubble and condense the film bubble. Most of the cooling methods choose internal cooling, which blows out centrifugal cooling air from the circular air outlet to cool the film bubble from the inside.

[0003] In the film production process, since the plastic particles melt due to heat, it is easy for residual material to remain at the film blowing position. The accumulation of too much residual material garbage will not only damage the production equipment, but also affect the production quality of the film. Therefore, it is necessary to stop the machine regularly for cleaning. When cleaning the residual material garbage, workers need to manually shovel the film blowing position with a shovel. The whole cleaning time is long, and the temperature of the cleaned material blown out is high. Manually shoveling away the residual material is not only time-consuming and laborious, but also requires prevention of burns at all times. For this reason, we propose a film blowing device that is easy to clean. Summary of the invention

[0004] The problem that the utility model aims to solve is that manually removing the residual material is time-consuming and laborious and is easy to cause burns.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a film blowing device that is easy to clean, comprising a film blowing seat, an air suction pipe, and a scraping mechanism, wherein the air suction pipe is vertically arranged at the middle of the top end of the film blowing seat and penetrates downward through the film blowing seat and is connected to the exhaust fan, and the top end of the film blowing seat is provided with an inner blowing slot, a film blowing slot, and an outer blowing slot in sequence from the inside to the outside, and the blowing slot, the film blowing slot, and the outer blowing slot are all annular slots, and the scraping mechanism comprises an annular mounting block arranged at the edge of the top end of the film blowing seat, an annular hollow cavity is arranged inside the annular mounting block, an annular through hole communicating with the annular hollow cavity is arranged on the inner side wall of the annular mounting block, an annular rotating block is movably arranged in the annular hollow cavity, a plurality of first teeth are circumferentially arranged on the outer side wall of the annular rotating block, a support plate passing through the annular through hole is arranged on the inner side wall of the annular rotating block, one end of the support plate is rotatably connected to one end of the scraper through a rotating shaft, and a scraper assembly is arranged at a position corresponding to the film blowing slot at the bottom of the other end of the scraper.

[0006] As a preferred solution of the easy-to-clean film blowing device described in the utility model, the scraper assembly includes a blade mounting block arranged at the bottom end of the scraper, the cross-section of the blade mounting block is an isosceles trapezoid, blades are respectively fixed on both sides of the blade mounting block, and the bottom end of the blade is in contact with the surface of the film blowing groove.

[0007] As a preferred solution of the easy-to-clean film blowing device described in the utility model, the top ends of the support plate and the scraper are respectively provided with a first locking block and a second locking block, the middle parts of the first locking block and the second locking block are provided with mounting holes of the same size, and a pin is slidably inserted in the mounting hole.

[0008] As a preferred solution of the easy-to-clean film blowing device described in the utility model, the bottom wall, top wall and inner wall of the annular hollow cavity are circumferentially provided with a plurality of ball grooves, balls are movably arranged in the ball grooves, and the bottom wall, top wall and inner wall of the annular rotating block are all in contact with the balls.

[0009] As a preferred solution of the easy-to-clean film blowing device described in the utility model, an opening is provided at a position on the outer wall of the annular mounting block corresponding to the annular rotating block, a driving assembly is provided on the outer wall of the film blowing seat, the driving assembly includes a mounting plate arranged on the outer wall of the film blowing seat, a rotating motor is arranged on the mounting plate, a gear is arranged at the output end of the rotating motor, and the gear passes through the opening and meshes with a plurality of first teeth.

[0010] As a preferred solution of the easy-to-clean film blowing device described in the utility model, an annular blowing hood is arranged on the outside of the inner blowing slot, a cover plate is arranged on the top of the annular blowing hood, and a plurality of blowing holes are evenly distributed on the outer wall of the annular blowing hood.

[0011] The beneficial effects of the utility model are as follows: the utility model fixes the positional relationship between the support plate and the scraper plate by inserting a pin into the mounting holes of the first locking block and the second locking block; the annular rotating block drives the scraper plate to rotate through the support plate when it is rotated under force; the scraper assembly at the bottom end of the scraper plate can scrape off the residual material at the film blowing groove, avoiding the time-consuming and labor-intensive manual shoveling of residual material and easy burns. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0013] Figure 1 A straightforward diagram of a film blowing device that is easy to clean.

[0014] Figure 2 The present invention is a structural diagram of the cooperation between a film blowing seat and an air suction pipe in a film blowing device which is easy to clean.

[0015] Figure 3The present invention is a schematic diagram of the cooperation between the annular rotating block and the scraper assembly in a film blowing device which is easy to clean.

[0016] Figure 4 The present invention is a cross-sectional view of an annular rotating block in a film blowing device which is easy to clean.

[0017] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0018] Figure 6 The present invention is a schematic diagram of the structure of the cooperation between a scraper and a scraper assembly in a film blowing device which is easy to clean. DETAILED DESCRIPTION

[0019] The utility model is specifically introduced below in conjunction with the accompanying drawings and embodiments.

[0020] Reference Figures 1 to 6 The present embodiment is a film blowing device that is easy to clean, comprising a film blowing seat 100, an air suction pipe 200, and a scraping mechanism 300. The air suction pipe 200 is vertically arranged at the middle of the top of the film blowing seat 100 and penetrates downward through the film blowing seat 100 and is connected to the exhaust fan. The top of the film blowing seat 100 is provided with an inner blowing slot 101, a film blowing slot 102, and an outer blowing slot 103 from the inside to the outside. The blowing slot 101, the film blowing slot 102, and the outer blowing slot 103 are all annular slots. The scraping mechanism 300 comprises an annular mounting block 301 arranged at the edge of the top of the film blowing seat 100. The annular mounting block 301 is provided at the top of the film blowing seat 100. 01, an annular hollow cavity S is provided inside, an annular through hole 302 connected to the annular hollow cavity S is provided on the inner wall of the annular mounting block 301, an annular rotating block 303 is movably arranged in the annular hollow cavity S, a plurality of first teeth 303a are circumferentially arranged on the outer wall of the annular rotating block 303, a supporting plate 303b passing through the annular through hole 302 is provided on the inner wall of the annular rotating block 303, one end of the supporting plate 303b is rotatably connected to one end of the scraper 304 through a rotating shaft 303c, and a scraper assembly 305 is provided at a position corresponding to the film blowing groove 102 at the bottom of the other end of the scraper 304.

[0021] The inner blowing slot 101 and the outer blowing slot 103 are respectively connected to the air outlet of the external cooling fan, and the film blowing slot 102 is connected to the external extruder. When the film blowing in the film blowing slot 102 is completed, there will be residual material remaining around the film blowing slot 102, affecting the next film blowing operation. A rotational force is provided to the annular rotating block 303 in the annular hollow cavity S to rotate the annular rotating block 303. When the annular rotating block 303 rotates, it drives the support plate 303b and the scraper 304 to rotate, and the scraper assembly 305 at the bottom end of the scraper 304 scrapes the material around the film blowing slot 102.

[0022] In this embodiment, the scraper assembly 305 includes a blade mounting block 305a arranged at the bottom end of the scraper plate 304, the cross-section of the blade mounting block 305a is an isosceles trapezoid, and blades 305b are fixed on both sides of the blade mounting block 305a, and the bottom end of the blade 305b is in contact with the surface of the film blowing groove 102.

[0023] Since the cross section of the blade mounting block 305a is an isosceles trapezoid, the blades 305b on both sides of the blade mounting block 305a are inclined, making it easier to scrape off the residual material.

[0024] In this embodiment, the top of the support plate 303b and the scraper plate 304 are respectively provided with a first locking block 303d and a second locking block 304a, and the middle of the first locking block 303d and the second locking block 304a is provided with mounting holes of the same size, and a pin 305c is slidably inserted in the mounting hole.

[0025] When the film blowing seat 100 is performing the film blowing operation, the scraper 304 is rotated upward to press against one side of the annular mounting block 301 to avoid obstructing the film blowing operation. After the film blowing operation is completed, there is residual material around the film blowing groove 102, and the scraper 304 is rotated to be flush with the support plate 303b. At this time, the blade 305b at the bottom end of the scraper 304 is also in contact with the surface of the film blowing groove 102, and the pin 305c is inserted into the mounting holes of the first locking block 303d and the second locking block 304a to fix the positional relationship between the support plate 303b and the scraper 304, so as to avoid rotation between the support plate 303b and the scraper 304 so that the blade 305b no longer fits the surface of the film blowing groove 102.

[0026] In this embodiment, the bottom wall, top wall, and inner wall of the annular hollow cavity S are circumferentially provided with a plurality of ball grooves 306, in which balls 306a are movably arranged, and the bottom wall, top wall, and inner wall of the annular rotating block 303 are all in abutment against the balls 306a.

[0027] When the annular rotating block 303 is rotated by force, since the bottom wall, the top wall, and the inner wall of the annular rotating block 303 are all against the ball 306a, the friction force on the annular rotating block 303 is not large and can be easily rotated.

[0028] In this embodiment, an opening 301a is provided on the outer wall of the annular mounting block 301 at a position corresponding to the annular rotating block 303, and a driving assembly 307 is provided on the outer wall of the film blowing seat 100. The driving assembly 307 includes a mounting plate 307a arranged on the outer wall of the film blowing seat 100, and a rotating motor 307b is arranged on the mounting plate 307a. A gear 307c is provided at the output end of the rotating motor 307b, and the gear 307c passes through the opening 301a and meshes with the plurality of first teeth 303a.

[0029] The rotating motor 307b is turned on, and the rotating motor 307b drives the gear 307c to rotate. Since the gear 307c is meshed with the plurality of first teeth 303a on the outer side wall of the annular rotating block 303, the annular rotating block 303 can be driven to rotate.

[0030] In this embodiment, an annular blowing cover 104 is arranged outside the inner blowing slot 101 , a cover plate 104 a is arranged on the top of the annular blowing cover 104 , and a plurality of blowing holes 104 b are evenly distributed on the outer wall of the annular blowing cover 104 .

[0031] The wind blown out of the inner blowing slot 101 is blown evenly toward the film bubble through the blowing holes 104b evenly distributed on the annular blowing cover 104, so that the film bubble is formed more evenly.

[0032] Working principle: the inner blowing slot 101 and the outer blowing slot 103 are respectively connected to the air outlet of the external cooling fan, and the film blowing slot 102 is connected to the external extruder. When the film blowing seat 100 is performing film blowing operation, the scraper 304 is rotated upward to abut against the side of the annular mounting block 301 to avoid hindering the film blowing operation. When the film blowing slot 102 is finished, there will be residual material remaining around the film blowing slot 102, affecting the next film blowing operation. The scraper 304 is rotated to be flush with the support plate 303b. At this time, the blade 305b at the bottom of the scraper 304 is also in contact with the surface of the film blowing slot 102, and the first locking block 303d and the second locking block 304 are inserted through the latch 305c. The positional relationship between the support plate 303b and the scraper 304 is fixed in the mounting hole of a to prevent the support plate 303b and the scraper 304 from rotating so that the blade 305b is no longer in contact with the surface of the film blowing groove 102. Then, the rotating motor 307b is turned on, and the rotating motor 307b drives the gear 307c to rotate. Since the gear 307c is engaged with the multiple first teeth 303a on the outer side wall of the annular rotating block 303, the annular rotating block 303 can be driven to rotate. When the annular rotating block 303 rotates, it drives the support plate 303b and the scraper 304 to rotate. The blades 305b on both sides of the blade mounting block 305a at the bottom end of the scraper 304 can scrape off the excess material around the film blowing groove 102.

[0033] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A film blowing device that is easy to clean, characterized in that: The invention comprises a film blowing seat (100), an air suction pipe (200), and a scraping mechanism (300), wherein the air suction pipe (200) is vertically arranged at the middle of the top of the film blowing seat (100) and penetrates downwardly through the film blowing seat (100) and is connected to an exhaust fan, and the top of the film blowing seat (100) is provided with an inner blowing groove (101), a film blowing groove (102), and an outer blowing groove (103) in sequence from the inside to the outside, and the blowing groove (101), the film blowing groove (102), and the outer blowing groove (103) are all annular grooves, and the scraping mechanism (300) comprises an annular mounting block (301) arranged at the edge of the top of the film blowing seat (100), and an annular hollow cavity (101) is provided inside the annular mounting block (301). S), an annular through hole (302) communicating with the annular hollow cavity (S) is formed on the inner side wall of the annular mounting block (301), an annular rotating block (303) is movably arranged in the annular hollow cavity (S), a plurality of first teeth (303a) are circumferentially arranged on the outer side wall of the annular rotating block (303), a supporting plate (303b) passing through the annular through hole (302) is arranged on the inner side wall of the annular rotating block (303), one end of the supporting plate (303b) is rotatably connected to one end of a scraper (304) via a rotating shaft (303c), and a scraper assembly (305) is arranged at a position corresponding to the film blowing groove (102) at the bottom of the other end of the scraper (304).

2. The film blowing device that is easy to clean according to claim 1, characterized in that: The scraper assembly (305) comprises a blade mounting block (305a) arranged at the bottom end of the scraper plate (304); the cross section of the blade mounting block (305a) is an isosceles trapezoid; blades (305b) are respectively fixed on both sides of the blade mounting block (305a); and the bottom end of the blade (305b) is in contact with the surface of the film blowing groove (102).

3. A film blowing device that is easy to clean as claimed in claim 2, characterized in that: A first locking block (303d) and a second locking block (304a) are respectively provided at the top ends of the support plate (303b) and the scraper plate (304); mounting holes of the same size are provided in the middle of the first locking block (303d) and the second locking block (304a); and latches (305c) are slidably inserted into the mounting holes.

4. The easy-to-clean film blowing device according to claim 1, characterized in that: The bottom wall, top wall, and inner side wall of the annular hollow cavity (S) are all circumferentially provided with a plurality of ball grooves (306), and balls (306a) are movably arranged in the ball grooves (306). The bottom wall, top wall, and inner side wall of the annular rotating block (303) are all in contact with the balls (306a).

5. The film blowing device that is easy to clean according to claim 1, characterized in that: An opening (301a) is provided at a position of the outer wall of the annular mounting block (301) corresponding to the annular rotating block (303); a driving assembly (307) is provided on the outer wall of the film blowing seat (100); the driving assembly (307) comprises a mounting plate (307a) arranged on the outer wall of the film blowing seat (100); a rotating motor (307b) is provided on the mounting plate (307a); a gear (307c) is provided at the output end of the rotating motor (307b); the gear (307c) passes through the opening (301a) and meshes with the plurality of first teeth (303a).

6. The easy-to-clean film blowing device according to claim 1, characterized in that: An annular blowing cover (104) is arranged outside the inner blowing slot (101), a cover plate (104a) is arranged at the top of the annular blowing cover (104), and a plurality of blowing holes (104b) are evenly distributed on the outer wall of the annular blowing cover (104).

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