CN213860693U - Traction clamping roller control mechanism of film subsequent foaming device - Google Patents
Traction clamping roller control mechanism of film subsequent foaming device Download PDFInfo
- Publication number
- CN213860693U CN213860693U CN202021696819.3U CN202021696819U CN213860693U CN 213860693 U CN213860693 U CN 213860693U CN 202021696819 U CN202021696819 U CN 202021696819U CN 213860693 U CN213860693 U CN 213860693U
- Authority
- CN
- China
- Prior art keywords
- roller
- cylinder
- fixed
- movable
- bubble
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
A traction clamping roller control mechanism of a subsequent film foaming device comprises a first traction clamping roller and a second traction clamping roller, wherein the first traction clamping roller comprises a first fixed roller and a first movable roller, and is also provided with a first horizontal cylinder for driving the first movable roller to horizontally move; the second traction clamping roller comprises a second fixed roller and a second movable roller and is further provided with a second horizontal cylinder for driving the second movable roller to move horizontally, the second horizontal cylinder is a double-stroke cylinder, the double-stroke cylinder comprises two cylinder units, each cylinder unit comprises a cylinder body and a piston rod, the piston rods of the two cylinder units are opposite in direction relative to the corresponding cylinder body, the piston rods of the two cylinder units are located on the same straight line, the cylinder bodies of the two cylinder units are connected together, the position of the piston rod of the first cylinder unit is fixed, and the piston rod of the second cylinder unit is connected with the second movable roller. The utility model discloses can improve the bubble success rate, improve the bubble diameter degree of accuracy that the bubble obtained.
Description
Technical Field
The utility model belongs to the technical field of film production, concretely relates to follow-up blistering equipment's of film pull pinch roll control mechanism.
Background
The plastic film can be produced by a blown film process. During the production process of the film, the plastic melt is extruded upwards from the circular extrusion opening of the die head 91 and forms the film bubble 81, as shown in fig. 1, a vertical air inlet pipe 92 is arranged at the center of the die head, air can be blown into the film bubble 81 from the vertical air inlet pipe 92 at the center of the die head during the production process, so that the film bubble 81 is inflated, then the film bubble runs through a traction nip roller 93 above the die head to be flattened to form the film 80, and then the film 80 is wound. In the above production process, the bubble is formed only once, so it is also called single bubble process, and most of common thin films generally adopt single bubble process.
However, some other films (e.g. heat shrinkable films) cannot be fully formed in place by one-time inflation, or if the heat shrinkable films are formed by one-time inflation, the performance of the heat shrinkable films is poor, so the films generally need to be formed by multiple times of inflation, and each inflation requires to form one corresponding bubble, i.e. multiple double-bubble processes, such as a double-bubble process or even a triple-bubble process, are required.
In the multi-bubble process, the process of forming the bubble (first bubble for short) for the first time is completely the same as that of the single-bubble process. After the first bubble 81 (first bubble for short) is formed, the bubble is collapsed to form a film (referred to in the row as a "bubble"), after which the film needs to be re-foamed to form a second bubble 82, as shown in fig. 2, for continued inflation and continued stretching, the second bubble being referred to as a "second bubble", sometimes even a third bubble, and correspondingly, the third bubble is referred to as a "third bubble". Each subsequent puff, except the first one, is referred to as a subsequent puff.
The subsequent frothing process is different from the frothing process of the first froth. This is because, as shown in fig. 2, the first bubble 81 is extruded from the circular extrusion outlet of the die 1, that is, one end of the bubble 81 (first bubble) is planted in the die 1, and compressed air can be blown into the bubble 81 by using the vertical air inlet pipe 92 at the center of the die. When the film 80 is subsequently foamed, the upper end and the lower end of the film bubble 82 (the second bubble) are clamped by the traction nip rollers (the traction nip roller 1 and the traction nip roller 2), the die head 1 is not involved, and the vertical air inlet pipe 92 capable of directly blowing compressed air into the film bubble does not exist.
The structure of the existing equipment for subsequent foaming of the thin film is shown in fig. 2, and comprises a first traction nip roller 1 and a second traction nip roller 2, wherein the first traction nip roller 1 is positioned above the second traction nip roller 2, a heating box 4 is arranged between the first traction nip roller 1 and the second traction nip roller 2, and the heating box 4 is provided with a heating element; the first traction nip roller 1 comprises a first fixed roller 11 and a first movable roller 12, the first fixed roller 11 and the first movable roller 12 are parallel to each other, the vertical positions of the first fixed roller 11 and the first movable roller 12 are parallel and level, the position 11 of the first fixed roller is fixed, the first fixed roller 11 is provided with a first motor for driving the first fixed roller to rotate, the first traction nip roller is also provided with a first horizontal cylinder for driving the first movable roller 12 to horizontally move, and the first horizontal cylinder drives the first movable roller to leave or approach the first fixed roller; the second traction pinch roll 2 comprises a second fixed roll 21 and a second movable roll 22, the second fixed roll 21 and the second movable roll 22 are parallel to each other, the vertical positions of the second fixed roll 21 and the second movable roll 22 are parallel and level, the position 11 of the second fixed roll 21 is fixed, the second fixed roll 21 is provided with a second motor for driving the second fixed roll to rotate, a second horizontal cylinder 3 for driving the second movable roll 22 to horizontally move is further arranged, and the second horizontal cylinder 3 drives the second movable roll 22 to leave or approach the second fixed roll 21.
The subsequent foaming process of the existing film is as follows:
the first movable roller 12 and the first fixed roller 11 are opened, the film 80 is conveyed from an upstream station on the production line to the first traction nip roller, the film 80 foams after being foamed by other upstream stations on the production line and is folded into a double-layer film, as shown in fig. 3 (the double-layer film is in a ring shape before being folded into double layers), a worker pulls the film 80 to pass between the first fixed roller 11 and the first movable roller 12, then the first horizontal cylinder drives the first movable roller 12 to horizontally move towards the first fixed roller 11, the first movable roller 12 is clamped with the first fixed roller 11, and the first traction nip roller 1 starts to pinch the film to move downwards; the worker continues to pull the end of the film 80 to move downwards, the film passes through the heating box 4, then passes downwards between the second fixed roller 22 and the second movable roller 21 of the second pulling and clamping roller 2, then the worker tightens the end of the film 80, and utilizes an air gun to penetrate through a tightening opening at the end of the film and inflate the middle of the film, so that the film is expanded to form a second bubble 82, in the process, the heating box heats and heats the bubble, when the temperature of the bubble reaches a melting critical value, the second bubble 82 starts to be inflated and gradually increases in diameter, when the diameter of the second bubble 82 is inflated to a set value, the second horizontal air cylinder 3 drives the second movable roller 22 to horizontally move towards the second fixed roller 21, the second movable roller 22 and the second fixed roller 21 are clamped, the inner cavity of the bubble is completely sealed, the air in the inner cavity of the bubble is reserved, and the subsequent foaming process is completed.
However, the above foaming process has the following problems:
firstly, because the upstream film is continuously extruded and conveyed in the foaming process, if the time of the foaming process is too long, the film continuously conveyed in the upstream will be accumulated on the subsequent foaming equipment and cannot be timely led away and digested, and the film can be entangled to cause foaming failure. Thus, the shorter the time taken for the subsequent frothing process, the better. However, in the above-mentioned subsequent foaming apparatus, since the film must pass through between the second movable roller and the second fixed roller as soon as possible, and in order to allow the bubble, which is just broken and broken, to pass through and escape from between the second movable roller and the second fixed roller as soon as possible in the production process (so as to prevent the film from staying in the heating box for a long time and causing fire and other accidents), the opening width of the second movable roller and the second fixed roller is required to be large enough, which means that the opening width of the lower end of the bubble is large in the whole process of inflation, and the cylinder for driving the second movable roller is required to have a large stroke; the opening width of the lower end of the bubble is large, so that although the gas can be favorably and quickly introduced into the inner cavity of the bubble in the initial stage of inflation, the opening width of the lower end of the bubble is large along with the increase of the air pressure of the inner cavity of the bubble, the air in the inner cavity of the bubble is not favorably maintained, the time consumption of the whole inflation process is long, and the bubbling time length is not favorably shortened;
in the process, when the inflation is finished and the bubble is detected to be increased to a set diameter value, the second traction nip roller starts to fold; however, as mentioned above, the distance between the second movable roller and the second fixed roller is very large when the second movable roller is opened, the cylinder stroke of the second movable roller is relatively large, the film bubble generates relatively large deformation in the folding and clamping process of the second traction and clamping roller, the moving range of the second movable roller in the folding process is large, the moving time is long, namely, the distance between the time point when the diameter of the bubble is detected to be in accordance with the set value and the time point after the final actual folding is longer, so that the shape of the folded bubble is greatly changed relative to the shape of the bubble before folding (namely the shape of the bubble when the diameter of the bubble is detected to reach a set value), therefore, there may be a small difference between the bubble shape detected when the diameter meets the set value and the bubble shape after final closing, which means that the accuracy of bubble diameter control in the foaming process needs to be improved (the bubble diameter determines the volume of air inside the bubble and thus the bubble size in the foaming process).
For the reasons, the diameter control accuracy of the subsequent foaming of the film in the prior art is low, the foaming failure rate is high, and the film bubble can be successfully formed only by repeatedly foaming for many times.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned shortcoming and provide a follow-up foaming equipment's of film pull clamp roller control mechanism, it can improve the foaming success rate, improves the bubble diameter degree of accuracy that the foaming obtained.
The purpose can be realized according to the following scheme: a traction clamping roller control mechanism of a film subsequent foaming device comprises a first traction clamping roller and a second traction clamping roller, wherein the first traction clamping roller is positioned above the second traction clamping roller, a heating box is arranged between the first traction clamping roller and the second traction clamping roller, and the heating box is provided with an infrared heating element;
the first traction clamping roller comprises a first fixed roller and a first movable roller, the first fixed roller and the first movable roller are parallel to each other, the vertical positions of the first fixed roller and the first movable roller are parallel and level, the position of the first fixed roller is fixed, the first fixed roller is provided with a first motor for driving the first fixed roller to rotate, the first traction clamping roller is further provided with a first horizontal cylinder for driving the first movable roller to horizontally move, and the first horizontal cylinder drives the first movable roller to leave or approach the first fixed roller;
the second traction nip roller comprises a second fixed roller and a second movable roller, the second fixed roller and the second movable roller are parallel to each other, the vertical positions of the second fixed roller and the second movable roller are parallel and level, the position of the second fixed roller is fixed, the second fixed roller is provided with a second motor for driving the second fixed roller to rotate, the second fixed roller is also provided with a second horizontal cylinder for driving the second movable roller to horizontally move, and the second horizontal cylinder drives the second movable roller to leave or approach the second fixed roller;
the method is characterized in that: the second horizontal cylinder is a double-stroke cylinder which comprises two cylinder units, each cylinder unit comprises a cylinder body and a piston rod, the piston rods of the two cylinder units are opposite to the direction in which the corresponding cylinder bodies are pushed out, the piston rods of the two cylinder units are positioned on the same straight line, the cylinder bodies of the two cylinder units are connected together, the position of the piston rod of the first cylinder unit is fixed, and the piston rod of the second cylinder unit is connected with the second movable roller; when the piston rod of the first air cylinder unit is completely contracted relative to the cylinder body of the first air cylinder unit and simultaneously the piston rod of the second air cylinder unit is completely contracted relative to the cylinder body of the second air cylinder unit, the second movable roller is far away from the second fixed roller; when the piston rod of the first air cylinder unit is completely pushed out relative to the cylinder body of the first air cylinder unit and the piston rod of the second air cylinder unit is completely contracted relative to the cylinder body of the second air cylinder unit, the second movable roller is close to the second fixed roller, but a gap is reserved between the second movable roller and the second fixed roller; when the piston rods of the two cylinder units are completely pushed out relative to the corresponding cylinder bodies, the second movable roller is tightly attached to the second fixed roller.
An auxiliary compression roller and a compression roller driving cylinder for driving the auxiliary compression roller to move are further arranged below the second fixed roller, and the compression roller driving cylinder drives the auxiliary compression roller to move away from or close to the second fixed roller; the circumference surface of supplementary compression roller is formed with many ring shape breach grooves, and each ring shape breach groove extends along the circumferencial direction of supplementary compression roller, and each ring shape breach groove arranges along the axial of supplementary compression roller and arranges.
The utility model has the advantages of it is following and effect:
firstly, the utility model gradually reduces the width of the opening at the lower end of the film bubble according to the process of inflation in the process of inflating the film bubble, thus, in the early stage of inflation, because the internal air pressure of the film bubble is low, the opening is large, which is beneficial to accelerating the inflation speed, and in the later stage of inflation, because the internal air pressure of the film bubble is improved, the opening is gradually reduced, which is beneficial to reducing the outward reverse flow and leakage of the internal air of the film bubble, therefore, the inflation time length can be shortened on the whole, which is beneficial to accelerating the inflation process and shortening the bubbling time length;
when the film bubble is blown up, and the diameter obtained by the film bubble blowing up meets a set value, the second traction clamping roller starts to fold; the second movable roller before folding is close to the second fixed roller, so that the moving amplitude of the second movable roller is small in the folding process, the moving time is short, namely the distance between the time point when the diameter of the film bubble is detected to be in accordance with the set value and the time point after final actual folding is short; due to the two reasons, the diameter of the film bubble obtained by subsequent bubbling is more accurate.
When the film passes through the space between the second movable roller and the second fixed roller, the two piston rods of the double-stroke cylinder are completely contracted, and the opening width between the second movable roller and the second fixed roller can be large enough; on the other hand, in case of bubble breakage in the production process, the two piston rods of the double-stroke cylinder can also be completely contracted, so that the broken bubble can penetrate through the space between the second movable roller and the second fixed roller and escape as soon as possible, and accidents such as fire disasters and the like caused by the fact that the film stays in the heating box for a long time are avoided.
Fourth, the utility model discloses further add auxiliary compression roller, before heating the membrane bubble, auxiliary compression roller and second fixed roll can be fixed with the membrane bubble lower extreme clamp, the annular breach groove on auxiliary compression roller surface forms into ventilative passageway, thus, the upper and lower both ends of membrane bubble are all clamped fixedly before heating, and can utilize second fixed roll and auxiliary compression roller to pinch the membrane bubble down after clamping, stretch straight (flare) the membrane bubble from vertical from this, make the central axis position of membrane bubble stable, the membrane bubble can not scurry in disorder about under the compressed air impact, make membrane bubble diameter and volume control accurate; meanwhile, the situation that the film bubble with indefinite swing is too close to or even touches a heating element of the heating box is avoided, the local rupture of the film bubble is avoided, and the success rate of foaming is improved.
Drawings
FIG. 1 is a schematic diagram of a production apparatus and a production process of a single bubble method.
Fig. 2 is a schematic view of a production apparatus and a production process of a conventional double bubble method.
FIG. 3 is a schematic cross-sectional view of a film folded into two layers.
Fig. 4 is a schematic structural diagram of an embodiment of the present invention.
Fig. 5 is a schematic structural view of the double-stroke cylinder and the second movable roller in fig. 1.
Fig. 6 is a schematic structural view of the auxiliary pressing roller and the second fixing roller.
Fig. 7 is a schematic diagram of an intermediate state of step (2) of a method of using an embodiment of the present invention.
Fig. 8 is a diagram illustrating the state of the results of step (2) of a method of using an embodiment of the present invention.
Fig. 9 is a diagram illustrating the state of the result of step (3) of a method of using an embodiment of the present invention.
Fig. 10 is a diagram illustrating the state of the results of step (4) of a method of using an embodiment of the present invention.
Fig. 11 is a partially enlarged schematic view of fig. 10.
Fig. 12 is a diagram illustrating the state of the results of step (5) of a method of using an embodiment of the present invention.
Fig. 13 is a partially enlarged schematic view of fig. 12.
Fig. 14 is a diagram illustrating the state of the results of step (6) of a method of using an embodiment of the present invention.
Fig. 15 is a partially enlarged schematic view of fig. 14.
Fig. 16 is a schematic diagram of an intermediate state of step (8) of a method of using an embodiment of the present invention.
Fig. 17 is a partially enlarged schematic view of fig. 16.
Detailed Description
The drawing nip roller control mechanism of the film subsequent foaming device shown in fig. 4 comprises a first drawing nip roller 1 and a second drawing nip roller 2, wherein the first drawing nip roller 1 is positioned above the second drawing nip roller 2, a heating box 4 is arranged between the first drawing nip roller 1 and the second drawing nip roller 2, and the heating box is provided with an infrared heating element; the first traction nip roller 1 comprises a first fixed roller 11 and a first movable roller 12, the first fixed roller 11 and the first movable roller 12 are parallel to each other, the vertical positions of the first fixed roller 11 and the first movable roller 12 are parallel and level, the position 11 of the first fixed roller is fixed, the first fixed roller 12 is provided with a first motor for driving the first fixed roller to rotate, a first horizontal cylinder 13 for driving the first movable roller 12 to horizontally move is further arranged, and the first horizontal cylinder 13 drives the first movable roller 12 to leave or approach the first fixed roller 11; the second traction pinch roll 2 comprises a second fixed roll 21 and a second movable roll 22, the second fixed roll 21 and the second movable roll 22 are parallel to each other, the vertical positions of the second fixed roll 21 and the second movable roll 22 are parallel and level, the position of the second fixed roll 21 is fixed, the second fixed roll 21 is provided with a second motor for driving the second fixed roll to rotate, a second horizontal cylinder 3 for driving the second movable roll 22 to horizontally move is further arranged, and the second horizontal cylinder 3 drives the second movable roll 22 to leave or approach the second fixed roll; the second horizontal cylinder 3 is a double-stroke cylinder, as shown in fig. 5 and 13, the double-stroke cylinder has two strokes and can push the second movable roller 22 away by two different distances, the double-stroke cylinder includes two cylinder units, each cylinder unit includes a cylinder body and a piston rod, the cylinder body 32 of the first cylinder unit is connected with the cylinder body of the second cylinder unit 34, the piston rod 31 of the first cylinder unit is fixed in position (fixedly connected with the frame 90 of the device), and the piston rod 33 of the second cylinder unit is connected with the second movable roller 22; the piston rod 31 of the first cylinder unit and the piston rod 33 of the second cylinder unit are positioned on the same straight line, and the piston rods of the two cylinder units are opposite to each other in the extending direction relative to the corresponding cylinder bodies, specifically, in fig. 5, the extending direction of the piston rod 31 of the first cylinder unit relative to the cylinder body 32 of the first cylinder unit is towards the left of the drawing plane, and the extending direction of the piston rod 33 of the second cylinder unit relative to the cylinder body 34 of the second cylinder unit is towards the right of the drawing plane; when the piston rod 31 of the first cylinder unit is fully contracted with respect to the cylinder 32 of the first cylinder unit and simultaneously the piston rod 33 of the second cylinder unit is also fully contracted with respect to the cylinder 34 of the second cylinder unit, the two-stroke cylinder 3 is in a fully contracted state and the second movable roller 22 is away from the second fixed roller 21, as shown in fig. 9, 10 and 11; when the piston rod 31 of the first cylinder unit is completely pushed out relative to the cylinder body 32 of the first cylinder unit, and the piston rod 33 of the second cylinder unit is completely contracted relative to the cylinder body 34 of the second cylinder unit, the double-stroke cylinder 3 realizes the first stroke, and the second movable roller 22 is close to the second fixed roller 21, but a gap is left between the two rollers, as shown in fig. 12 and 13; when the piston rods of both cylinder units are fully extended with respect to the corresponding cylinder block (i.e. the piston rod 31 of the first cylinder unit is fully extended with respect to the cylinder block 32 of the first cylinder unit and at the same time the piston rod 33 of the second cylinder unit is also fully extended with respect to the cylinder block 34 of the second cylinder unit), the two-stroke cylinder 3 achieves the second stroke, and the second movable roller 22 abuts against the second fixed roller 21, as shown in fig. 16 and 17.
As shown in fig. 4, 6, 15 and 16, an auxiliary pressing roller 5 is further provided below the second fixed roller 21, a pressing roller driving cylinder 53 for driving the auxiliary pressing roller 5 to move is further provided, and the pressing roller driving cylinder 53 drives the auxiliary pressing roller 5 to move away from or close to the second fixed roller 21;
as shown in fig. 6, a plurality of circular annular notched grooves 51 are formed in the circumferential surface of the auxiliary pressing roller 5, each circular annular notched groove 51 extending in the circumferential direction of the auxiliary pressing roller 5, the circular annular notched grooves being arranged in line in the axial direction of the auxiliary pressing roller.
As shown in fig. 4, an ultrasonic diameter measuring instrument 6 for measuring the diameter of the film bubble is arranged between the lower end of the heating box 4 and the second traction nip roller 2; there is also a central controller to which the ultrasonic diameter measurement 6 is connected, which is connected to the two-stroke cylinder 3 and the press roller drive cylinder 53.
The use method of the embodiment comprises the following steps:
(1) preparing for foaming, keeping the first fixed roller 11 and the second fixed roller 21 rotating, opening the first movable roller 12 and the first fixed roller 11, keeping the double-stroke cylinder 3 in a fully contracted state, and enabling the auxiliary pressing roller 5 to leave the second fixed roller 21; the film 80 is conveyed from an upstream station on the production line to the first traction nip roller 1, and the film 80 is foamed after being foamed by other stations on the production line and is folded into a double-layer film, as shown in fig. 3 (the double-layer film is in a ring shape before being folded into double layers); the film 80 first travels to one end of the first pulling nip (end a in fig. 7, 8, 9, 10) referred to as the upstream end of the film;
(2) the worker pulls the upstream end of the film 80 downward through the space between the first fixed roller 11 and the first movable roller 12, as shown in fig. 7, then the first horizontal cylinder 13 drives the first movable roller 12 to move horizontally towards the first fixed roller 11, the first movable roller 12 is clamped with the first fixed roller 11, as shown in fig. 8, the first pulling nip roller 1 starts to pinch the film 80 downward, and the width value of the film 80 passing through the first pulling nip roller 1 is b (since the film 80 is double-layered, when the film is unfolded into a circular shape in the subsequent step, the total circumference length is 2b, as shown in fig. 3);
(3) the worker continues to pull the upstream end of the film 80 downward, the film 80 runs through the heating box 4, passes by the ultrasonic diameter measuring instrument 6, then passes downward between the second fixed roller 21 and the second movable roller 22 of the second pulling nip roller 2, and then passes between the second fixed roller 21 and the auxiliary pressing roller 5, as shown in fig. 9;
(4) after the film 80 passes through the space between the second fixing roller 21 and the auxiliary pressing roller 5, a worker tightens the upstream end of the film 80, and inflates air to the middle of the film 80 by passing through a tightening opening at the upstream end of the film through an air gun 7, so that the film positioned between the first traction nip roller 1 and the second traction nip roller 2 is expanded to form a bubble 82, the diameter of the bubble 82 is gradually increased, the upper end of the bubble 82 is clamped by the first traction nip roller 1, and the position of the upper end of the bubble 82 is fixed, as shown in fig. 10 and 11;
(5) the worker holds the air gun 7 to move and continues to pull the upstream end of the film 80 to travel downstream; when the diameter of the film bubble 82 measured by the ultrasonic diameter measuring instrument 6 reaches 2 b/pi x a1When (wherein a)1Is 0.60 to 0.80, and b is the width of the film 80 when passing through the first traction nip roll 1), the central controller commands the piston rod 31 of the first cylinder unit to be opposite to the first air cylinder unitThe cylinder body 32 of the cylinder unit is completely pushed out, and simultaneously the piston rod 33 of the second cylinder unit is kept completely contracted relative to the cylinder body 34 of the second cylinder unit, the double-stroke cylinder 3 realizes the first stroke, so that the second movable roller 22 is close to the second fixed roller 21, but a gap is still left between the two rollers, as shown in fig. 12 and 13;
(6) the worker continues to hold the air gun 7 to move and pull the upstream end of the film 80 to move towards the downstream of the production line, the air gun 7 continues to continuously inflate the film in the process, the inflated air also diffuses into the film bubble 82, the diameter of the film bubble 82 continues to increase, and when the diameter of the film bubble measured by the ultrasonic diameter measuring instrument 6 reaches 2 b/pi x a2When (wherein a)2The value range of (a) is 0.86-0.95), the pressing roller driving cylinder 53 drives the auxiliary pressing roller 5 to approach the second fixed roller 21, so that the auxiliary pressing roller 5 is attached to the second fixed roller 21, as shown in fig. 14 and 15; after the auxiliary pressure roller 5 is attached to the second fixed roller 21, the lower end of the film bubble 82 is clamped by the second fixed roller 21 and the auxiliary pressure roller 5, and the second fixed roller 21 and the auxiliary pressure roller 5 also start to assist in clamping and conveying the film to move downwards, so that the film bubble 82 is straightened, and the central axis position of the film bubble is stable; the air pressure generated by the air blown out by the air gun 7 is transmitted to the inner cavity of the film bubble 82 through the annular notch groove 51 of the auxiliary pressing roller 5;
(7) the worker continues to hold the air gun 7 to move and pulls the upstream end of the film to move towards the downstream of the production line, the heating box 4 heats the film bubble to enable the temperature of the film bubble 82 to rise, and when the temperature of the film bubble 82 reaches a melting critical value, the film bubble 82 starts to blow; after the film bubble 82 is blown, the volume of the inner cavity of the film bubble 82 is increased, and air blown out by an air gun is continuously inflated into the inner cavity of the film bubble 82 through a gap part between the auxiliary pressing roller 5 and the second fixing roller 21 (namely, the circular-ring-shaped notch 51 of the auxiliary pressing roller 5), so that the air pressure of the film bubble 82 is not correspondingly reduced due to the increase of the volume after the film bubble is blown;
(8) when the bubble diameter measured by the ultrasonic diameter measuring instrument is equal to the set bubble inflation diameter, the central controller commands the piston rod 31 of the first air cylinder unit to be completely pushed out relative to the cylinder body 32 of the first air cylinder unit, simultaneously the piston rod 33 of the second air cylinder unit is also completely pushed out relative to the cylinder body 34 of the second air cylinder unit, and the double-stroke air cylinder 3 realizes a second stroke to enable the second movable roller 22 to be tightly attached to the second fixed roller 21, as shown in fig. 16 and 17; the air gun 7 stops blowing air, and the subsequent foaming process is finished.
Claims (2)
1. A traction clamping roller control mechanism of a film subsequent foaming device comprises a first traction clamping roller and a second traction clamping roller, wherein the first traction clamping roller is positioned above the second traction clamping roller, a heating box is arranged between the first traction clamping roller and the second traction clamping roller, and the heating box is provided with an infrared heating element;
the first traction clamping roller comprises a first fixed roller and a first movable roller, the first fixed roller and the first movable roller are parallel to each other, the vertical positions of the first fixed roller and the first movable roller are parallel and level, the position of the first fixed roller is fixed, the first fixed roller is provided with a first motor for driving the first fixed roller to rotate, the first traction clamping roller is further provided with a first horizontal cylinder for driving the first movable roller to horizontally move, and the first horizontal cylinder drives the first movable roller to leave or approach the first fixed roller;
the second traction nip roller comprises a second fixed roller and a second movable roller, the second fixed roller and the second movable roller are parallel to each other, the vertical positions of the second fixed roller and the second movable roller are parallel and level, the position of the second fixed roller is fixed, the second fixed roller is provided with a second motor for driving the second fixed roller to rotate, the second fixed roller is also provided with a second horizontal cylinder for driving the second movable roller to horizontally move, and the second horizontal cylinder drives the second movable roller to leave or approach the second fixed roller;
the method is characterized in that: the second horizontal cylinder is a double-stroke cylinder which comprises two cylinder units, each cylinder unit comprises a cylinder body and a piston rod, the piston rods of the two cylinder units are opposite to the direction in which the corresponding cylinder bodies are pushed out, the piston rods of the two cylinder units are positioned on the same straight line, the cylinder bodies of the two cylinder units are connected together, the position of the piston rod of the first cylinder unit is fixed, and the piston rod of the second cylinder unit is connected with the second movable roller; when the piston rod of the first air cylinder unit is completely contracted relative to the cylinder body of the first air cylinder unit and simultaneously the piston rod of the second air cylinder unit is completely contracted relative to the cylinder body of the second air cylinder unit, the second movable roller is far away from the second fixed roller; when the piston rod of the first air cylinder unit is completely pushed out relative to the cylinder body of the first air cylinder unit and the piston rod of the second air cylinder unit is completely contracted relative to the cylinder body of the second air cylinder unit, the second movable roller is close to the second fixed roller, but a gap is reserved between the second movable roller and the second fixed roller; when the piston rods of the two cylinder units are completely pushed out relative to the corresponding cylinder bodies, the second movable roller is tightly attached to the second fixed roller.
2. The pulling nip control mechanism of a film post-foaming apparatus as set forth in claim 1, wherein: an auxiliary compression roller and a compression roller driving cylinder for driving the auxiliary compression roller to move are further arranged below the second fixed roller, and the compression roller driving cylinder drives the auxiliary compression roller to move away from or close to the second fixed roller; the circumference surface of supplementary compression roller is formed with many ring shape breach grooves, and each ring shape breach groove extends along the circumferencial direction of supplementary compression roller, and each ring shape breach groove arranges along the axial of supplementary compression roller and arranges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021696819.3U CN213860693U (en) | 2020-08-14 | 2020-08-14 | Traction clamping roller control mechanism of film subsequent foaming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021696819.3U CN213860693U (en) | 2020-08-14 | 2020-08-14 | Traction clamping roller control mechanism of film subsequent foaming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213860693U true CN213860693U (en) | 2021-08-03 |
Family
ID=77046417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021696819.3U Active CN213860693U (en) | 2020-08-14 | 2020-08-14 | Traction clamping roller control mechanism of film subsequent foaming device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213860693U (en) |
-
2020
- 2020-08-14 CN CN202021696819.3U patent/CN213860693U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112123746B (en) | Apparatus and method for subsequent foaming of film | |
| FI95110B (en) | Method and apparatus for making an extruded, stretched, seamless hose | |
| US4124351A (en) | Apparatus for the production of blowmolded synthetic-resin bodies | |
| US20120217324A1 (en) | Apparatus and method of manufacturing pressure compensator type drip irrigation tubes with desired molecular orientation and tubes obtained thereby | |
| US2544044A (en) | Apparatus and method for producing gusseted plastic tubing | |
| CN104002465B (en) | A kind of swollen-micro formula biaxial stretching pipe continuous shaping method and equipment | |
| IE32037B1 (en) | Method of and apparatus for stretching blown films longitudinally and transversely | |
| JPS5824253B2 (en) | Method and apparatus for producing double-walled plastic tubes having an outer wall with annular or helical folds | |
| HUT59852A (en) | Method and apparatus for producing continuously extruded spout of dropping | |
| US3577488A (en) | Manufacture of plastic tubular film | |
| CN203863998U (en) | Expansion-micro-shrinkage type biaxial stretching pipe continuous molding device | |
| GB1089863A (en) | Process and apparatus for the continuous production of biaxially stretched tubular films of linear polyesters | |
| US2559386A (en) | Manufacture of lay flat tubing | |
| US3466356A (en) | Method and apparatus for making plastic film | |
| US5932166A (en) | Method and apparatus for manufacturing joined tubes | |
| JP3854228B2 (en) | Method and apparatus for producing a double-walled thermoplastic tube with a connecting sleeve | |
| CN213860693U (en) | Traction clamping roller control mechanism of film subsequent foaming device | |
| US3320340A (en) | Controlled cooling of extruded plastic | |
| CN105599314A (en) | Continuous forming device of biaxial orientation polyvinyl chloride pipe and operating method | |
| CN109732876B (en) | Blow molding equipment for producing high-precision plastic barrel | |
| CN213261080U (en) | Film bubble clamping mechanism of film subsequent foaming device | |
| US20100143516A1 (en) | Device for producing blown films | |
| US5891480A (en) | Apparatus for the continuous production of biaxially-stretched blown plastic foil | |
| CN110142950B (en) | Film bubbling mechanism and bubbling control method thereof | |
| US3714309A (en) | Manufacture of plastic film |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |