Adjustable three-layer co-extrusion film blowing machine

Abstract

The utility model discloses an adjustable three-layer co-extrusion film blowing machine which comprises a fixing frame arranged on one side of the film blowing machine and a plurality of forming rollers, forming channels for extruding a film are formed among the forming rollers, adjusting openings are formed in the two sides of the fixing frame, adjusting blocks are movably installed at the positions, right opposite to the forming rollers, of the adjusting openings, and the adjusting blocks are connected with the forming rollers. And positioning rods are installed on the roller shafts on one side, the positioning rods are sleeved with positioning sleeves, gears are installed on the end faces of the outer sides of the positioning sleeves, the gears are connected in a meshed mode, and blocking mechanisms for limiting the gears are arranged outside the multiple gears. The device is simple in structure, the gears can be directly disassembled after the baffles are opened, the distance between the forming rollers can be adjusted by installing the gears of different sizes, adaptability is improved, the forming rollers can be directly and synchronously driven after replacement, parts such as a synchronous belt do not need to be adjusted, and adaptability is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of film blowing machines, and in particular to an adjustable three-layer co-extrusion film blowing machine. Background Art

[0002] In the field of plastic processing, especially in the field of composite packaging film processing such as HDPE and LDPE, film blowing units are commonly used processing equipment. The products processed by them are widely used in food, medicine, health products, stationery, cosmetics and other fields. The film blowing machine heats and melts plastic particles and then blows them into thin films. There are many types of film blowing machines, including PE, POF, PVC, etc. The new materials blown out with brand new particles are uniform in color, clean, and the bags are well stretched.

[0003] After the film blowing machine drives the adjustment plate through the cylinder, only the size of the three film blowing outlets of the film blowing machine can be adjusted, and there is a lack of an effective distance adjustment structure between the two forming rollers, which makes it impossible to flexibly adjust the distance between the two forming rollers, thereby reducing the film pressing effect between the two forming rollers. In addition, after the adjustment, it is generally necessary to adjust the tightness of the synchronous belt, thereby reducing the practicality of the film blowing machine. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide an adjustable three-layer co-extrusion film blowing machine, which can quickly adjust the distance between the forming rollers and disassemble the forming rollers to solve the problems raised in the above background technology.

[0005] The utility model is realized through the following technical scheme: an adjustable three-layer co-extrusion film blowing machine, comprising a fixed frame and a plurality of molding rollers arranged on one side of the film blowing machine, the molding rollers are arranged inside the fixed frame, a molding channel for extruding a film is formed between the molding rollers, adjustment ports are arranged on both sides of the fixed frame, adjustment blocks are movably installed at the adjustment ports facing the molding rollers, sealed bearings are embedded at the centers of the adjustment blocks, roller shafts are installed at both ends of the molding rollers, both ends of the roller shafts are installed in the sealed bearings, and positioning rods are installed on the roller shafts on one side, positioning sleeves are sleeved on the outside of the positioning rods, gears are installed on the outer end faces of the positioning sleeves, the gears are meshed and connected, and blocking mechanisms for limiting the gears are arranged on the outsides of the plurality of gears.

[0006] As a preferred technical solution, the blocking mechanism includes a baffle and multiple ball bearings. The baffle is arranged on the outside of the multiple gears. The baffle is provided with multiple ball grooves. The balls are movably arranged in the ball grooves. Parts of the balls extend to the outside through the openings of the ball grooves and contact the outer side surfaces of the gears. The upper end of the baffle is bent to form a fixing portion, which extends to the outside of the fixing frame and is fixedly connected to the fixing frame through a hinge. A first screw hole is provided on the fixing portion, and a second screw hole is provided on the outer side surface of the fixing frame. Fixing bolts are threadedly connected in the first screw hole and the second screw hole.

[0007] As a preferred technical solution, slide grooves are vertically provided on both sides of the adjustment port, and sliders are installed on both sides of the adjustment block, and the sliders are slidably arranged in the slide grooves.

[0008] As a preferred technical solution, compression springs are installed on opposite end surfaces of the adjustment block, and the other ends of the compression springs are installed on the inner wall surface of the adjustment port.

[0009] As a preferred technical solution, a motor is installed on the adjustment block on one side, and the rotating shaft of the motor is fixedly connected to the corresponding roller shaft.

[0010] As a preferred technical solution, a plurality of straight slots are provided below the fixing frame.

[0011] The beneficial effects of the utility model are as follows: the utility model has a simple structure, and the gears can be directly disassembled after the baffle is opened. The distance between the forming rollers can be adjusted by installing gears of different sizes, thereby increasing adaptability. After replacement, the forming rollers can be directly driven synchronously without adjusting components such as synchronous belts, thereby greatly increasing adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a side view of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the utility model when the blocking mechanism is removed;

[0016] Figure 4 This is a schematic diagram of the structure of the utility model after the gears are further removed.

[0017] Among them, 1. fixed frame; 2. forming roller; 3. adjusting block; 4. roller shaft; 5. compression spring; 6. motor; 7. slide groove; 8. baffle; 9. gear; 10. ball bearing; 11. fixing bolt; 12. positioning sleeve; 13. positioning rod. DETAILED DESCRIPTION

[0018] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0019] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0020] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0021] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, an adjustable three-layer co-extrusion film blowing machine of the utility model comprises a fixed frame 1 and a plurality of forming rollers 2 arranged on one side of the film blowing machine, the forming rollers 2 are arranged inside the fixed frame 1, and a forming channel for extruding a film is formed between the forming rollers 2, and adjustment ports are arranged on both sides of the fixed frame 1, and adjustment blocks 3 are movably installed at the adjustment ports just opposite to the forming rollers 2, and sealed bearings are embedded at the center of the adjustment blocks 3, and roller shafts 4 are installed at both ends of the forming rollers 2, and both ends of the roller shafts 4 are installed in the middle of the sealed bearings, and positioning rods 13 are installed on the roller shafts 4 on one side, and positioning sleeves 12 are sleeved on the outside of the positioning rods 13, and gears 9 are installed on the outer end faces of the positioning sleeves 12, and the gears 9 are meshed and connected with each other, and blocking mechanisms for limiting the gears 9 are arranged on the outside of the plurality of gears 9;

[0022] Wherein, the cross section of the positioning rod and the cross section of the inner cavity of the positioning sleeve are both arranged in a rectangular structure.

[0023] In this embodiment, the blocking mechanism includes a baffle plate 8 and a plurality of balls 10. The baffle plate 8 is arranged on the outside of the plurality of gears 9. The baffle plate 8 is provided with a plurality of ball grooves. The balls 10 are movably arranged in the ball grooves. Parts of the balls 10 extend to the outside through the openings of the ball grooves and are in contact with the outer side surfaces of the gears 9. The upper end of the baffle plate 8 is bent to form a fixing portion. The fixing portion extends to the outside of the fixing frame 1 and is fixedly connected to the fixing frame 1 through a hinge. The fixing portion is provided with a first screw hole. The outer side surface of the fixing frame 1 is provided with a second screw hole. The first screw hole and the second screw hole are threadedly connected with fixing bolts 11.

[0024] The baffle can be positioned by fixing bolts so that the balls on the baffle can press the gears, thereby preventing the gears from disengaging due to outward movement, and reducing the friction between the balls and the gears through the rotation of the balls.

[0025] In this embodiment, slide grooves 7 are vertically provided on both sides of the adjustment port, and sliders are installed on both sides of the adjustment block 3. The sliders are slidably set in the slide grooves 7, so that the adjustment block can only move up and down along the slide grooves, thereby preventing the adjustment block from detaching from the adjustment port.

[0026] In this embodiment, compression springs 5 ​​are installed on opposite end surfaces of the adjustment block 3, and the other ends of the compression springs 5 ​​are installed on the inner wall surface of the adjustment port.

[0027] In this embodiment, a motor 6 is installed on the adjustment block 3 on one side, and the rotating shaft of the motor 6 is fixedly connected to the corresponding roller shaft 4 .

[0028] In this embodiment, a plurality of straight slots are provided below the fixing frame 1, and bolts can pass through the straight slots to fix the fixing frame to one side of the film blowing machine.

[0029] When adjusting the width of the forming channel, the fixing bolts can be screwed out. After the fixing of the fixing bolts is lost, the baffle can be opened outward with the hinge as the center. After the baffle is lost, the gear can be directly removed from the positioning rod and installed with gears of different sizes. After installing different gears, the roller shaft and the forming roller can be pushed outward by the mutual extrusion between the gears. Moreover, the gears after installation are still meshed together. There is no need to install components such as synchronous belts, and there is no need to adjust again, which greatly increases the convenience. The gears and the forming roller can be squeezed inward by the compression spring, so that there is an extrusion force between the forming rollers to extrude the film.

[0030] After the above is completed, the baffle can be re-covered so that the ball on the baffle can be pressed on the outer surface of the gear, thereby pressing the gear tightly and positioning it on the positioning rod, which greatly increases convenience;

[0031] After the motor is started, it can drive the forming roller and the roller shaft to rotate. The rotation of the roller shaft drives the positioning rod, the positioning sleeve and the gear. Through the meshing gears, the two forming rollers can rotate in opposite directions to complete the extrusion of the film.

[0032] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope defined in the claims.

Claims

1. An adjustable three-layer co-extrusion film blowing machine, characterized in that: The invention comprises a fixed frame (1) and a plurality of forming rollers (2) arranged on one side of the film blowing machine, wherein the forming rollers (2) are arranged inside the fixed frame (1), and a forming channel for extruding the film is formed between the forming rollers (2). Adjustment ports are arranged on both sides of the fixed frame (1), and adjustment blocks (3) are movably installed at the adjustment ports facing the forming rollers (2). A sealed bearing is embedded at the center of the adjustment block (3), and roller shafts (4) are installed at both ends of the forming rollers (2). Both ends of the roller shafts (4) are installed in the middle of the sealed bearings, and a positioning rod (13) is installed on the roller shafts (4) on one side, and a positioning sleeve (12) is sleeved on the outside of the positioning rods (13), and a gear (9) is installed on the outer end surface of the positioning sleeve (12), and the gears (9) are meshed and connected with each other, and a blocking mechanism for limiting the gears (9) is arranged on the outside of the plurality of gears (9).

2. The adjustable three-layer co-extrusion film blowing machine according to claim 1, characterized in that: The blocking mechanism comprises a baffle (8) and a plurality of balls (10). The baffle (8) is arranged on the outer sides of the plurality of gears (9). The baffle (8) is provided with a plurality of ball grooves. The balls (10) are movably arranged in the ball grooves. Parts of the balls (10) extend to the outside through the openings of the ball grooves and contact the outer side surfaces of the gears (9). The upper end of the baffle (8) is bent to form a fixing portion. The fixing portion extends to the outer side of the fixing frame (1) and is fixedly connected to the fixing frame (1) through a hinge. The fixing portion is provided with a first screw hole. The outer side surface of the fixing frame (1) is provided with a second screw hole. The first screw hole and the second screw hole are threadedly connected with fixing bolts (11).

3. The adjustable three-layer co-extrusion film blowing machine according to claim 1, characterized in that: Both sides of the adjustment opening are vertically provided with slide grooves (7), and both sides of the adjustment block (3) are provided with sliders, which are slidably arranged in the slide grooves (7).

4. The adjustable three-layer co-extrusion film blowing machine according to claim 1, characterized in that: Compression springs (5) are installed on opposite end surfaces of the adjustment block (3), and the other ends of the compression springs (5) are installed on the inner wall surface of the adjustment port.

5. The adjustable three-layer co-extrusion film blowing machine according to claim 1, characterized in that: A motor (6) is installed on the adjustment block (3) on one side, and the rotating shaft of the motor (6) is fixedly connected to the corresponding roller shaft (4).

6. The adjustable three-layer co-extrusion film blowing machine according to claim 1, characterized in that: A plurality of straight slots are arranged below the fixing frame (1).

Images