Plastic bag film blowing equipment

Abstract

The utility model relates to the technical field of plastic film blowing, in particular to plastic bag film blowing equipment which comprises a rack, a smoothing assembly, a transmission assembly and a cutting assembly. The cutting assembly is composed of a second air cylinder, a support, a supporting wheel, a two-way screw, a clamping block, a cutting ring and a moving part. The output end of the second air cylinder is fixedly connected with the support. According to the plastic bag film blowing equipment, when the two-way screw rotates, as the directions of threads at the two ends of the two-way screw are opposite, the two moving pieces in threaded connection with the two-way screw can move towards the middle at the same time under the action of the thread pair. And the moving piece moves along the clamping groove in the clamping block, so that the linearity and the accuracy of movement are ensured. The moving part drives the cutting rings fixedly connected with the moving part to get close to the middle, the two cutting rings get close gradually and finally cut off the plastic film, and if the cutting edge is irregular, the moving speed or cutting force of the cutting rings can be finely adjusted, so that the product quality is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to plastic blowing film technical field, concretely relates to a plastic bag blowing film equipment. BACKGROUND

[0002] Blown film technology gradually emerged with the development of the plastics industry. Early blown film technology is relatively simple, and the equipment is also relatively simple, and the quality and performance of the produced plastic bags have certain limitations. With the continuous progress of science and technology, blown film equipment is constantly updated and replaced, and the degree of automation is getting higher and higher, and the production efficiency and product quality have been greatly improved. For example, from the traditional single screw extruder to the double screw extruder, the plasticizing effect and extrusion amount of plastic are improved; from manual control of blown film parameters to computer automatic control, the thickness, width, blow ratio and other parameters of the film can be accurately controlled, so that the quality of the film is more stable.

[0003] Plastic bag blowing film is to heat and melt plastic particles, then extrude them into a tubular shape through an extruder, then blow compressed air into the tube to inflate the tubular film to the desired size and thickness, and at the same time, under the action of the traction device, the film is cooled and shaped and wound into a roll. In this process, there are many links such as melting, extruding, blowing and cooling of plastic, and each link needs to accurately control the relevant parameters to ensure that the produced plastic bags have good performance and quality.

[0004] The utility model discloses a kind of winding devices for blown film plastic bag of application No. CN202420145062.0, including installation frame, the inner side bottom of the installation frame is respectively equipped with winding roller and transmission roller, the surface of the transmission roller is provided with limiting component, the limiting component includes the limiting ring that is symmetrically set in the outer portion of the transmission roller, the top of the transmission roller is provided with mounting screw rod;Through the design of limiting component, it is convenient for plastic bag to realize limiting conveying by transmission roller, it is convenient for the limiting of plastic bag of different width, so that plastic bag is not prone to issue deviation in the process of winding, it is convenient to improve the winding effect of plastic bag, and practicality is better;Through the design of functional component, it is convenient for plastic band to realize the function of tension adjustment in the winding process, so that plastic bag is not prone to wrinkle when conveying and winding, it is convenient to improve the compactness of plastic band winding, avoid the loose condition of plastic bag when winding, and practical effect is better.

[0005] The application limits the plastic bags of different widths by setting the limiting component, so that the plastic bags are not prone to deviation during winding. However, during the winding process of the plastic bag film, the corners are difficult to keep flat during processing, and it is more difficult to keep the plastic film corners at the same horizontal plane during winding, which affects the winding efficiency of the plastic film.

[0006] Therefore, it is necessary to provide a new technical solution to overcome the above-mentioned defects. Practical new content

[0007] The utility model discloses a plastic bag blowing film equipment can effectively solve the technical problem of above.

[0008] In order to achieve the purpose of the utility model, the following technical scheme is adopted:

[0009] A plastic bag blowing film equipment, it include: frame, smoothing subassembly, transmission subassembly, cutting assembly,

[0010] The cutting assembly is by second air cylinder, support, support wheel, bidirectional screw rod, clamping block, cutting ring, moving piece, the output of second air cylinder with support fixed connection, support with support wheel rotation is connected, bidirectional screw rod with support rotation is connected, clamping block with support fixed connection, cutting ring with moving piece fixed connection, moving piece with bidirectional screw rod screw connection, the clamping block is set up with the clamping groove convenient for moving piece movement in.

[0011] Further, the second air cylinder, support, cutting ring, moving piece are all along bidirectional screw rod long side midline place mirror image and are equipped with two groups.

[0012] Further, the transmission subassembly includes motor, winding roller, transmission wheel, the motor with winding roller is through the belt drive, winding roller with transmission wheel is through the belt and drives each other, and the inside of belt is equipped with rack, and winding roller and transmission wheel's end part are all equipped with gear.

[0013] Further, the smoothing subassembly is by bottom frame, first air cylinder, first drive wheel, second drive wheel, smoothing roller, the bottom frame with first air cylinder fixed connection, first drive wheel with second drive wheel side all fixed connection has gear, and two sets of gear interlock, and first drive wheel side prolongs and has extension plate, the output of first air cylinder with the extension plate fixed connection that first drive wheel prolongs, first drive wheel with second drive wheel middle axle place all fixed mounting has mounting bracket, and mounting bracket is rotationally installed smoothing roller on.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the utility model discloses a plastic bag blowing film equipment, when bidirectional screw rod rotates, because the thread direction of both ends is opposite, two moving pieces connected with bidirectional screw rod will move to the middle under the action of thread pair. The moving piece moves along the clamping groove in the clamping block, ensuring the linearity and accuracy of movement. The moving piece drives the cutting ring fixedly connected therewith to move to the middle, which is convenient for adjusting the distance between the cutting rings, so as to cut the uneven edges of the film during the winding process. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings are used to provide further understanding of the present application, and form a part of the specification, and are used to explain the present application together with embodiments of the present application, and do not constitute a limitation on the present application.

[0016] Figure 1 It is a structure schematic view of the plastic bag film blowing equipment of the present application;

[0017] Figure 2 It is a structure schematic view of the smoothing assembly of the plastic bag film blowing equipment of the present application;

[0018] Figure 3 It is a structure schematic view of the plastic bag film blowing equipment of the present application;

[0019] Figure 4 It is a structure schematic view of the transmission assembly of the plastic bag film blowing equipment of the present application;

[0020] Figure 5 It is a structure schematic view of the cutting assembly of the plastic bag film blowing equipment of the present application;

[0021] Figure 6 It is a structure schematic view of the plastic bag film blowing equipment of the present application; Figure 5 Large picture of A in the middle.

[0022] In the figure: 1, rack; 2, smoothing assembly; 21, base frame; 22, first cylinder; 23, first drive wheel; 24, second drive wheel; 25, smoothing roller; 3, transmission assembly; 31, motor; 32, winding roller; 33, transmission wheel; 4, clamping device; 5, cutting assembly; 51, second cylinder; 52, support; 53, support wheel; 54, bidirectional screw; 55, clamping block; 56, cutting ring; 57, moving piece. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below, obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments.

[0024] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "transverse", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the protection scope of the utility model. When a mechanism is referred to as being "fixed to" another mechanism, it can be directly on the other mechanism or a middle mechanism can also exist. When a mechanism is referred to as being "connected to" another mechanism, it can be directly connected to the other mechanism or a middle mechanism can also exist. When a mechanism is referred to as being "provided on" another mechanism, it can be directly provided on the other mechanism or a middle mechanism can also exist. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for illustrative purposes.

[0025] As shown in Figures 1 to 6 A plastic bag film blowing equipment, comprising: rack 1, smoothing assembly 2, transmission assembly 3, cutting assembly 5.

[0026] The smoothing assembly 2 is by the base frame 21, first air cylinder 22, first drive wheel 23, second drive wheel 24, smoothing roller 25;The base frame 21 with the first air cylinder 22 fixedly connected, the output end of the first air cylinder 22 with the first drive wheel 23 one side fixedly connected, the first drive wheel 23 with the second drive wheel 24 is engaged, the first drive wheel 23 and second drive wheel 24 middle shaft are fixedly installed with mounting bracket, and the mounting bracket is rotatably installed smoothing roller 25;The first drive wheel 23 side is equipped with extension rod, the extension rod with first air cylinder 22 fixedly connected, when the first air cylinder 22 starts, its output end will do linear reciprocating motion. Through the fixed connection with the first drive wheel 23, the linear motion is converted into the rotation of the first drive wheel 23, thereby providing power for subsequent gear transmission and smoothing roller 25 rotation, when the first drive wheel 23 is driven by the first air cylinder 22 and starts to rotate, due to the meshing effect between the gear, the second drive wheel 24 will be rotated together, when the first drive wheel 23 and the second drive wheel 24 rotate, their middle shaft will also rotate, in turn drive mounting bracket rotation. Since the smoothing roller 25 is rotatably installed on the mounting bracket, the rotation of the mounting bracket will drive the smoothing roller 25 to rotate. Smoothing roller 25 contacts with plastic film in the rotating process, and a certain pressure and friction force can be applied to the surface of the plastic film through the rolling of the smoothing roller 25, so that the wrinkles or uneven places on the surface of the plastic film are smoothed, and the plastic film can be wound flat.

[0027] The transmission assembly 3 comprises a motor 31, a winding roller 32 and a transmission wheel 33; the motor 31 is driven by a belt to drive the winding roller 32, and the winding roller 32 is driven by a belt to drive the transmission wheel 33, and a rack is arranged on the inner side of the belt, and gears are arranged on the ends of the winding roller 32 and the transmission wheel 33, and a clamping device 4 is arranged on the surface of the winding roller 32; the motor 31 serves as a power source to provide rotating power. The power of the motor 31 is transmitted to the winding roller 32 through the belt drive, so that the winding roller 32 can rotate to realize the winding operation of the plastic film and other materials. Compared with the ordinary belt drive, the belt drive with the rack and gear cooperation has higher transmission accuracy and stability. It can more accurately transmit power and avoid slipping phenomenon. The main function of the clamping device 4 is to fix or connect the material to be wound (such as plastic film), so that it can be firmly wound on the winding roller 32, preventing the material from slipping or falling off during winding;

[0028] In addition, when the winding material needs to be replaced or the equipment needs to be maintained, the material can be conveniently loosened and fixed, improving the convenience and efficiency of operation.

[0029] The cutting assembly 5 comprises a second cylinder 51, a support 52, a supporting wheel 53, a bidirectional screw 54, a clamping block 55, a cutting ring 56 and a moving piece 57; the output end of the second cylinder 51 is fixedly connected with the support 52, the support 52 is rotationally connected with the supporting wheel 53, the bidirectional screw 54 is rotationally connected with the support 52, the clamping block 55 is fixedly connected with the support 52, the cutting ring 56 is fixedly connected with the moving piece 57, the moving piece 57 is threadedly connected with the bidirectional screw 54, and a clamping groove is arranged in the clamping block 55 for the movement of the moving piece 57; the second cylinder 51, the support 52, the cutting ring 56 and the moving piece 57 are all mirror-imaged along the long edge center line of the bidirectional screw 54; the second cylinder 51 is started, the output end of the second cylinder 51 pushes the support 52 to move forward, so that the cutting assembly 5 approaches the plastic film. At the same time, the bidirectional screw 54 starts to rotate under the driving of the external driving motor, and when the bidirectional screw 54 rotates, the two moving pieces 57 threadedly connected with the bidirectional screw 54 will move towards the middle under the action of the screw pair. The moving piece 57 moves along the clamping groove in the clamping block 55, ensuring the linearity and accuracy of the movement. The moving piece 57 drives the cutting ring 56 fixedly connected therewith to move towards the middle, so as to adjust the distance between the cutting rings 56, so as to cut the uneven edges of the film during the winding process;

[0030] In addition: the device is usually equipped with quality detection devices such as film thickness detector, surface flatness detector, etc. to detect the quality of the plastic film in real time after winding. If the plastic film thickness is uneven, the surface has wrinkles or the cutting edge is not neat, etc. Quality detection device will feedback the signal to the control system. The control system adjusts the working parameters of the transmission assembly 3 and the cutting assembly 5 according to the feedback information. For example, if the film thickness is uneven, it can be improved by adjusting the motor 31 speed or winding tension; if the cutting edge is not neat, the moving speed or cutting force of the cutting ring 56 can be adjusted to improve the product quality and realize closed-loop control of the whole winding process.

[0031] Working principle:

[0032] When the first cylinder 22 starts, its output end will do linear reciprocating motion. Through the fixed connection with the first driving wheel 23, the linear motion is converted into the rotary motion of the first driving wheel 23, thereby providing power for the subsequent gear transmission and the rotation of the flattening roller 25. The flattening roller 25 contacts with the plastic film during rotation, and the rolling of the flattening roller 25 can exert a certain pressure and friction force on the surface of the plastic film, thereby flattening the wrinkles or unevenness on the surface of the plastic film, so that the plastic film can be wound flat. The motor 31 serves as a power source to provide rotating power. Through belt transmission, the power of the motor 31 is transmitted to the winding roller 32, so that the winding roller 32 can rotate to realize the winding operation of the plastic film and the like. At the same time, the bidirectional screw 54 starts to rotate under the driving of the motor 31. When the bidirectional screw 54 rotates, the two moving parts 57 connected with the bidirectional screw 54 by threads will move to the middle at the same time under the action of the thread pair, and the cutting ring 56 fixedly connected with the moving part 57 will move to the middle, and the two cutting rings 56 will gradually approach and finally cut off the plastic film.

[0033] The standard parts used in the utility model can be purchased from the market, and the special-shaped parts can be ordered according to the description and the drawings. The specific connection mode of each part adopts the conventional means such as bolts, rivets and welding in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The circuit connection adopts the conventional connection mode in the prior art, which will not be described in detail here. The contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0034] It should be understood that those skilled in the art can improve or change according to the above description, and all these improvements and changes shall belong to the protection scope of the appended claims of the utility model.

Claims

1. A plastic bag blown film device, characterized in that, Include: Frame, smoothing assembly, transmission assembly, cutting assembly; The cutting assembly is provided with a second cylinder, a support, a supporting wheel, a bidirectional screw rod, a clamping block, a cutting ring and a moving piece. The output end of the second cylinder is fixedly connected with the support. The support is rotationally connected with the supporting wheel. The bidirectional screw rod is rotationally connected with the support. The clamping block is fixedly connected with the support. The cutting ring is fixedly connected with the moving piece. The moving piece is threadedly connected with the bidirectional screw rod. The clamping block is provided with a clamping groove for facilitating the movement of the moving piece.

2. A plastic bag blowing apparatus as claimed in claim 1, wherein The second cylinder, the support, the cutting ring and the moving piece are all provided with two groups of mirror images along the center line of the long side of the bidirectional screw rod.

3. A plastic bag blowing apparatus as defined in claim 1 wherein, The transmission assembly includes a motor, a winding roller and a transmission wheel. The motor is driven by the winding roller through a belt. The winding roller and the transmission wheel are driven by each other through a belt. The inner side of the belt is provided with a rack. The end of the winding roller and the transmission wheel is provided with a gear.

4. A plastic bag blowing apparatus as defined in claim 1 wherein, The smoothing assembly is provided with a bottom frame, a first cylinder, a first driving wheel, a second driving wheel and a smoothing roller. The bottom frame is fixedly connected with the first cylinder. The side of the first driving wheel and the second driving wheel is fixedly connected with a gear. The two gears are meshed with each other. The side of the first driving wheel is extended with an extension plate. The output end of the first cylinder is fixedly connected with the extension plate extended by the first driving wheel. The central axis of the first driving wheel and the second driving wheel is fixedly installed with a mounting bracket. The mounting bracket is rotationally installed with the smoothing roller.

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