Forage film blown film production process

Abstract

A blown film production process for hay film includes the following steps: multiple extruders continuously extrude plastic material into a blown film die head, which continuously extrudes multi-layered composite annular hay film; the annular hay film is flattened laterally to form a folded hay film, and then the front and rear ends of the folded hay film are cut open respectively; subsequently, the two hay films are peeled off, so that the peel line of the two hay films is lower than the horizontal clamping rollers; during the above process, the real-time tension f of one of the hay films after peeling is continuously detected; a fixed industrial camera continuously captures images of the hay film near the peel line, and the vertical position of the peel line is judged and analyzed in real time based on the captured video images, thereby determining the real-time vertical distance h between the peel line and the horizontal plane where the center axes of the left and right guide rollers are located; the real-time adhesive force F of the two hay films is continuously calculated according to the following formula: F=fsin(x / 2), x=2arctan(m / 2h). This invention can measure and control the adhesive force of hay film online.

Description

Technical Field

[0001] This invention belongs to the technical field of plastic film production processes, specifically relating to a blown film production process for pasture film. Background Technology

[0002] Livestock farming requires large quantities of forage throughout the year, but natural grasses wither in autumn and winter, leading to a shortage of forage supply in winter and spring. Therefore, a certain amount of forage needs to be stored during the summer and autumn for use in winter and spring; this is known in the industry as silage. Fresh forage for silage needs to be wrapped and sealed in plastic film to maintain an anaerobic environment. Otherwise, if a large amount of air seeps in, yeast and mold will multiply rapidly, not only consuming the sugars and lactic acid in the silage but also decomposing cellulose and other cell wall components, producing harmful metabolic substances and significantly reducing the nutrient content of the silage. For these reasons, forage silage requires specialized plastic film, known in the industry as forage film. This film must be adhesive, and this adhesiveness must be maintained for at least one year. It must also be opaque, puncture-resistant, and have high tensile strength. Controlling the adhesive strength of the forage film within a qualified range is crucial. This is because if the adhesive strength of the hay film is insufficient, the sealing effect after wrapping will be poor, which is not conducive to the silage preservation of hay; however, the adhesive strength of the hay film cannot be too strong, otherwise it will be inconvenient to unfold and wrap during use, and the unfolding process may be damaged due to excessive force.

[0003] Forage film can be produced using a multi-layer co-extrusion blown film method. The existing blown film production process for forage film includes the following steps: (1) Multiple extruders continuously extrude plastic materials through the extruder barrel into the blown film head. The plastic materials converge at the blown film head 1 and are then continuously extruded from the annular extrusion port 10 of the blown film head to form a multi-layer composite annular forage film 8, such as... Figure 1 As shown, the plastic material extruded by each extruder corresponds to one layer of material in the annular pasture film 8; in the above process, the extruder corresponding to the inner layer of the annular pasture film also uses a gear pump to continuously inject polyisobutylene glue (i.e., PIB glue) into the barrel, so that the inner layer of the annular pasture film becomes an adhesive layer with adhesive properties; (2) the annular pasture film 8 is flattened laterally by the herringbone clamp 2 to become a folded pasture film 81, as shown Figure 5 As shown; then, using the cutter 3, the front and rear ends of the folded pasture film 81 are cut open respectively, so that the folded pasture film 81 becomes two pieces of pasture film simply stacked together (this state of pasture film is called the superimposed pasture film 82), as shown. Figure 6As shown, inside the stacked pasture film 82, the longitudinal ends of the two pasture films are no longer connected as one, but the adhesive layers of the two pasture films are still stuck together; (3) the stacked pasture film 82 is passed vertically downward through the horizontal clamping roller 4; after passing through the clamping line of the horizontal clamping roller, the two pasture films are immediately peeled off, the left pasture film 83 runs through the left guide roller 51 and is wound up by the left winding shaft 61, while the right pasture film 84 runs through the right guide roller 52 and is wound up by the right winding shaft 62, as shown Figure 1 As shown, the production process is completed. During the above process, because the lateral clearance between the left and right guide rollers is sufficiently large, the opening angle of the two hay films during peeling is sufficiently large, and the horizontal component of the tension generated by the two hay films is much greater than the adhesive force between them. Therefore, the two hay films can be peeled off immediately after passing the horizontal clamping roller line. The peeled left hay film 83 continues to move around the left guide roller 51 at an angle, and the peeled right hay film 84 continues to move around the right guide roller 52 at an angle, as shown... Figure 1 As shown, the peeling line is located very close to the horizontal pinch line but higher than the lowest point of the horizontal pinch line. Figure 2 (M point / N point in the middle).

[0004] Figure 2 As shown, in the field of blown film production technology, the horizontal clamping roller 4 consists of two clamping roller bodies. The circumferential surfaces of the two clamping roller bodies are pressed together to clamp the plastic film. The part where the two clamping roller bodies are pressed together is a straight line segment, which is called the horizontal clamping roller clamping line. On a cross-section perpendicular to the central axis of the clamping roller body, the horizontal clamping roller clamping line is the clamping point, which is also the tangent point of the circumferential contours of the two clamping roller bodies, as shown in the figure. Figure 2 As shown in point A. In the production process of blown film for pasture, the peeling part of the two pasture films is a line segment, so the peeling part of the two pasture films is called the peeling line. The peeling line is a point on the cross section perpendicular to the clamping line of the horizontal clamping roller, commonly known as the peeling point.

[0005] In the production of hay film, the adhesive material is not applied to the surface of the hay film like ordinary adhesive tape. Instead, PIB adhesive is injected into the extruder and stirred. This allows the PIB adhesive to penetrate evenly into the hay film (not just on the surface) and slowly seep out to the surface during subsequent use, ensuring that the adhesion can be maintained for more than a year. However, because PIB adhesive is a gel-like liquid, it cannot be added to the extruder from above the hopper like other powdered plastic raw materials. It can only be injected from the side into the middle section of the extruder barrel using pressure. The weight proportion of PIB adhesive in the hay film is relatively low. The amount of PIB adhesive injected is positively correlated with the adhesive strength of the hay film; that is, the greater the amount of PIB adhesive injected, the greater the adhesive strength.

[0006] In the production process of multilayer co-extrusion blown film, various process parameters of the entire production line are often adjusted according to the specific conditions on site. For example, changes in workshop temperature will cause changes in cooling rate, which in turn requires adjustment of plastic film extrusion speed and travel speed. Changes in plastic film travel speed will cause changes in plastic film tension. For another example, adjusting plastic film extrusion speed requires adjusting extruder pressure. When extruder pressure changes, the amount of PIB adhesive injected will be affected and fluctuate accordingly, thus causing fluctuations in the adhesion of the finished forage film.

[0007] To control the adhesion of PIB (pill-in-brush) film, while theoretically the amount of adhesive injected can be measured using a metering pump, in practice, metering pumps are often inaccurate when measuring the flow rate of PIB adhesive. This is because the theoretical basis of metering pumps is the volume of fluid propelled per unit time by the rotation of the pump core. The main calculations are based on the pump core rotation speed and the effective volume of the pump body. However, PIB adhesive has a very high viscosity. After being injected into the pump body, some of it becomes stuck inside, reducing the actual effective volume and the effective transport volume. This often results in a situation where "the pump core rotates, but not all the adhesive in the pump body flows forward in time," leading to inaccurate measurement and control of the actual amount of PIB adhesive injected, resulting in either too strong or too weak adhesion of the PIB film. Currently, existing technologies only allow for sampling and measurement of adhesion after the entire roll of PIB film has been produced. This is merely post-production monitoring and sample checking; even if deviations in adhesion are found after sampling, there is no opportunity for timely correction. Summary of the Invention

[0008] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a forage film blown film production process that can measure and control the adhesion of the forage film online.

[0009] The objective can be achieved through the following scheme: a forage film blowing production process, comprising the following steps: (1) Multiple extruders continuously squeeze plastic material into the blown film head, and the blown film head continuously extrudes multi-layer composite annular pasture film. The plastic material extruded by each extruder forms one layer of the annular pasture film. During the above process, glue is continuously injected into the barrel of the extruder corresponding to the inner layer of the annular pasture film, so that the inner layer of the annular pasture film becomes an adhesive layer with adhesive properties. (2) Flatten the circular pasture film in the transverse direction to form a folded pasture film. Then cut open the front and rear ends of the folded pasture film to make the folded pasture film into two pasture films stacked together. The adhesive layers of the two pasture films stacked together are glued together. (3) The two pieces of straw film stacked together pass vertically downward through the longitudinally extending horizontal clamping roller. After that, the two pieces of straw film are peeled off. After peeling, the straw film on the left moves through the left guide roller and is wound up, and the straw film on the right moves through the right guide roller and is wound up. The left and right guide rollers are arranged symmetrically about the vertical plane passing through the clamping line of the horizontal clamping roller, so that the peeling line of the two pieces of straw film is located directly below the clamping line of the horizontal clamping roller. Its features include: a preset lateral clearance between the left and right guide rollers that is less than half the vertical distance between the horizontal clamping line of the horizontal clamping rollers and the horizontal plane containing the central axes of the left and right guide rollers, so that the peeling lines of the two hay films are lower than the horizontal clamping rollers; During the above process, the real-time tension f of one of the hay films after peeling is continuously monitored; a stationary industrial camera is used to continuously capture images of the hay film near the peeling line, and the vertical position of the peeling line is analyzed in real time based on the captured video images, thereby determining the real-time vertical distance h between the peeling line and the horizontal plane containing the central axes of the left and right guide rollers; the real-time adhesive force F of the two hay films is continuously calculated according to the following formula: F=fsin(x / 2), x=2arctan(m / 2h), where m is the lateral net distance between the right and left guide rollers, and x represents the angle between the two hay films when peeling; the amount of glue injected is adjusted and controlled online based on the calculated real-time adhesive force F.

[0010] If the calculated real-time adhesive force F exceeds the preset upper limit of the adhesive force threshold, the amount of adhesive injected is reduced; if the calculated real-time adhesive force F is lower than the preset lower limit of the adhesive force threshold, the amount of adhesive injected is increased.

[0011] The shooting direction of the industrial camera is perpendicular to the horizontal clamping line of the clamping rollers.

[0012] Industrial cameras shoot horizontally.

[0013] The present invention has the following advantages and effects: During the production process, the horizontal component of the tension generated by the two hay films downstream of the peeling line maintains a dynamic balance with the adhesive force between the two hay films. If the adhesive force of the hay film fluctuates, the vertical position of the peeling line between the two hay films will also fluctuate. Therefore, the vertical position of the peeling line can reflect the adhesive force between the two hay films. Furthermore, based on the vertical position of the peeling line and the magnitude of the plastic film tension f, the real-time adhesive force F of the two hay films at the peeling line position can be calculated relatively accurately. Finally, the amount of glue injected can be adjusted and controlled online based on the calculated real-time adhesive force F, thereby controlling the adhesive force between the two hay films within a preset threshold range. Therefore, this invention can calculate and control the adhesive force of the hay film online, so that the adhesive force of the entire roll of hay film produced can be monitored from beginning to end, and any abnormalities can be corrected in time, thereby avoiding large-scale and wide-area deviations in adhesive force. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the traditional blown film production process for pasture film.

[0015] Figure 2 This is a schematic diagram of a horizontal clamping roller structure in the field of blown film production technology.

[0016] Figure 3 This is a schematic diagram of the blown film production process of pasture film according to a specific embodiment of the present invention.

[0017] Figure 4 This is a schematic diagram of the cross-section of a ring-shaped pasture film obtained by the blown film production process.

[0018] Figure 5 This is a schematic diagram of the process in blown film production where a circular forage film is flattened into a folded forage film.

[0019] Figure 6 This is a schematic diagram of the process of cutting folded forage film into stacked forage film in the blown film production process.

[0020] Figure 7 yes Figure 3 A magnified view of a portion of the image.

[0021] Figure 8 yes Figure 7 A partial three-dimensional structural diagram of the relevant components.

[0022] Figure 9 yes Figure 7 A schematic diagram illustrating the geometric positional relationship between the horizontal clamping roller and the left and right guide rollers.

[0023] Figure 10 yes Figure 7 A schematic diagram showing the change in the state after the angle between the two hay films on the left and right sides decreases.

[0024] Figure 11 yes Figure 7 A schematic diagram showing the change in the state after the angle between the two hay films on the left and right sides increases. Detailed Implementation

[0025] Figure 3 The illustrated process for producing blown film for forage includes the following steps: (1) Multiple extruders continuously extrude plastic materials into the blown film head 1. The plastic materials converge inside the blown film head 1 and are then continuously extruded upwards from the annular extrusion port 10 of the blown film head and inflated to form a multi-layered composite annular pasture film 8. The cross-sectional structure of the resulting annular pasture film 8 is as follows: Figure 4 As shown, the film comprises multiple layers of plastic material layered together, with the innermost layer being the innermost layer 80 of the annular pasture film. The plastic material extruded by each extruder forms one layer of the annular pasture film 8. During the process, a gear pump continuously injects PIB adhesive into the barrel of the extruder corresponding to the inner layer 80 of the annular pasture film. The injected PIB adhesive is mixed with other plastic materials in the barrel of the extruder, making the inner layer 80 of the annular pasture film an adhesive layer. (2) Using the herringbone clamp 2, the circular pasture film 8 is gradually flattened laterally to become a folded pasture film 81, as shown. Figure 3 , Figure 5 As shown; the folded pasture film 81 is composed of two planar pasture films folded together. The front and rear ends of the two pasture films are connected by fold lines, so in the cross-section perpendicular to the length of the pasture film, it is still a loop connected end to end, and its front and rear ends have fold lines (the fold lines are in... Figure 5 , Figure 6 The two sections of the pasture film (represented by points P and Q) are called folded pasture film. Inside the folded pasture film 81, the adhesive layers of the two sections of pasture film face each other and are bonded together. Then, the cutter 3 is used to cut the front and rear ends of the folded pasture film 81 (i.e., Figure 6 The ends of the membrane containing point P and point Q are cut open respectively, so that the folded pasture membrane becomes two overlapping pieces of pasture membrane, as shown below. Figure 6 As shown; the two pieces of pasture film stacked together are called the stacked pasture film 82; in the stacked pasture film 82, the front ends of the two pieces of pasture film are no longer connected as one, and the rear ends are no longer connected as one, and there are no fold lines, but the adhesive layers of the two pieces of pasture film are still stuck together. (3) The stacked hay film 82 (i.e., two hay films stacked together) passes vertically downward through the longitudinally extending horizontal clamping roller 4, as shown. Figure 3 , Figure 7 , Figure 8 , Figure 2As shown, the two hay films are then peeled off. The hay film 83 on the left tilts downward to the left and runs through the left guide roller 51, while the hay film 84 on the right tilts downward to the right and runs through the right guide roller 52. After the hay film 83 on the left runs through the left guide roller 51, it is wound up by the left take-up shaft 61, and after the hay film 84 on the right runs through the right guide roller 52, it is wound up by the right take-up shaft 62. Figure 2 , Figure 7 , Figure 9 As shown, the left guide roller 51 and the right guide roller 52 are positioned relative to the horizontal clamping line (at... Figure 2 , Figure 7 The vertical plane (i.e., represented by point A) Figure 2 , Figure 9 The plane n in the middle is arranged symmetrically on the left and right sides, so that the peeling lines of the two hay films are located directly below the clamping line of the horizontal clamping rollers; and the preset lateral net distance m between the left guide roller 51 and the right guide roller 52 is less than the horizontal plane where the clamping line of the horizontal clamping rollers and the center axes of the left and right guide rollers are located (e.g., ...). Figure 9 Vertical distance (as shown in the midplane g) Figure 7 Half of the medium-sized line H) so that the peel lines of the two hay films (in) Figure 7 This is represented by point B. Figure 8 The CD line is lower than the horizontal clamping roller 4 (i.e., lower than the lowest point of the horizontal clamping roller 4, as shown in the image). Figure 2 (As shown by points M / N in the diagram). The right guide roller 52 is equipped with a tension detector and becomes a tension detection roller. During the above process, the tension detection roller continuously detects the real-time tension f of a piece of pasture film 84 on the right side after peeling and transmits the real-time tension detection result to the central processing unit. A stationary industrial camera 7 is also used to continuously film the straw film near the peeling line. This industrial camera 7 is located to the left of the stacked straw film 82, and its shooting direction (e.g., Figure 7 The middle arrow (a) indicates a horizontal direction pointing to the right, that is, a plane perpendicular to the plane directly above the peeling line where the overlapped forage film 82 is located. This also means that the shooting direction of the industrial camera is perpendicular to the horizontal clamping line of the clamping rollers. Figure 3 , Figure 7 , Figure 8 As shown; The central processing unit analyzes the vertical position of the peeling line in real time based on the video images captured by the industrial camera 7, thereby determining the horizontal plane in which the peeling line is located relative to the center axes of the left and right guide rollers (e.g., ...). Figure 9The real-time vertical distance between the two hay films (as shown in the mid-plane g) is calculated, and the real-time adhesive force F of the two hay films at the peeling line position is continuously measured according to the following formula: F=fsin(x / 2), x=2arctan(m / 2h), where m is the lateral net distance between the left guide roller 51 and the right guide roller 52, x represents the angle between the two hay films when peeling, and h is the real-time vertical distance between the peeling line and the horizontal plane containing the central axis of the left and right guide rollers. Figure 7 As shown, the central processing unit adjusts and controls the amount of PIB adhesive injected online based on the calculated real-time adhesive force F. Specifically, it pre-sets the upper and lower limits of the adhesive force threshold. When the calculated real-time adhesive force F exceeds the pre-set upper limit of the adhesive force threshold, the amount of adhesive injected is reduced. When the calculated real-time adhesive force F is lower than the pre-set lower limit of the adhesive force threshold, the amount of adhesive injected is increased.

[0026] The principle of use of the present invention will be explained below with reference to embodiments: There is an adhesive force between the two hay films before peeling, and this adhesive force is positively correlated with the amount of glue injected; on the other hand, the lateral clearance m between the left and right guide rollers is less than the horizontal plane where the clamping line of the horizontal clamping rollers and the center axes of the left and right guide rollers are located (e.g., Figure 9 Vertical distance (as shown in the midplane g) Figure 7 Half of the medium dimension line H (as shown) means Figure 9 The included angle formed by the right edge point E of the middle left guide roller, the clamping point A of the horizontal clamping roller, and the left edge point F of the right guide roller ( Figure 9 ∠EAF is small enough, such as Figure 9 As shown, this ensures that the peeling lines of the two hay films are below the horizontal clamping rollers (specifically, below the lowest point of the horizontal clamping rollers), allowing the position of the peeling lines to change vertically according to fluctuations in adhesive force and be captured by the industrial camera. In other words, because the lateral clearance between the left and right guide rollers is small enough, if the two hay films immediately turn towards the corresponding guide rollers after leaving the clamping line of the horizontal clamping rollers, the horizontal component of the tension in the hay film will be less than the adhesive force between the two hay films. Therefore, the two hay films cannot actually peel off smoothly near the clamping line of the horizontal clamping rollers, and the vertical position of the actual peeling line (actual turning point) will be forced to move downwards by a certain distance. Only when the vertical position of the peeling line moves downwards, increasing the angle between the two hay films to a certain value, and the horizontal component of the tension in the hay film is exactly equal to the adhesive force between the two hay films, can the two hay films be peeled off. After peeling, the left hay film no longer continues to wrap around the left guide roller, and the right hay film also no longer continues to wrap around the right guide roller.

[0027] Furthermore, since the peel lines of the two hay films are far from the horizontal clamping rollers, the vertical position of the peel lines is no longer limited by the horizontal clamping rollers. Moreover, the horizontal component of the tension generated by the hay film is exactly equal to the adhesive force between the two hay films. Therefore, when the adhesive force of the hay film fluctuates, the vertical position of the peel lines will continuously fluctuate to maintain a dynamic balance between the horizontal component of the tension and the adhesive force between the two hay films. Specifically, assuming the adhesive force of the hay film increases during production, the two hay films cannot continue to peel smoothly from their original peeling positions. As a result, the vertical position of the peel lines will decrease, and the angle between the two hay films will increase. The increased angle leads to an increase in the horizontal component of the tension generated by the hay film to cope with the increased adhesive force, until a new balance is restored. The state after the angle increases is as follows: Figure 11 As shown; conversely, assuming that the adhesive force of the straw film decreases during production, and the horizontal component of the straw film tension is greater than the adhesive force between the two straw films, the original dynamic equilibrium will also be broken. Therefore, the vertical position of the peel line will shift upwards, reducing the angle between the two straw films. The horizontal component of the plastic film tension will then decrease until a new equilibrium is restored. The state after the angle decreases is shown in the figure. Figure 10 As shown.

[0028] On the other hand, since the straw film on the upper and lower sides of the peeling line extends in different directions (the overlapping straw film above the peeling line extends vertically, while the single-layer straw film below the peeling line extends diagonally downward), the brightness of the overlapping straw film above the peeling line and the single-layer straw film below the peeling line is different in the image captured by the industrial camera. Moreover, there is a transition line with a sudden change in light angle at the junction of the two (peeling line). Therefore, the central processing unit can analyze the position of the junction line between the two (overlapping straw film and single-layer straw film), and the vertical position of the junction line is equivalent to the vertical position of the peeling line.

[0029] Furthermore, since the vertical positions of the left and right guide rollers are fixed, after analyzing the spatial position of the peeling line, the central processing unit can calculate the vertical distance h between the peeling line and the plane containing the central axes of the left and right guide rollers, where h is a variable. The angle value x obtained by simplifying the calculation using the formula x=arctan(m / 2h) is very close to the angle between the two hay films during peeling; where m is the lateral clearance between the right and left guide rollers, equal to the lateral distance b between the central axes of the two guide rollers minus the sum of the radii r of the two guide rollers. Figure 7 As shown, m is a fixed value.

[0030] Finally, after calculating the real-time angle between the two hay films when they are peeled off, the horizontal component of the tension of the hay film and the adhesive force between the two hay films are dynamically balanced. Therefore, the real-time adhesive force F of the two hay films at the peel line position can be continuously calculated using the formula F=fsin(x / 2), and the amount of glue injected can be adjusted and controlled online according to the calculated real-time adhesive force F.

Claims

1. A process for producing blown film for forage grass, comprising the following steps: (1) Multiple extruders continuously squeeze plastic material into the blown film head, and the blown film head continuously extrudes multi-layer composite annular pasture film. The plastic material extruded by each extruder forms one layer of the annular pasture film. The glue is continuously injected into the barrel of the extruder corresponding to the inner layer of the circular pasture film, so that the inner layer of the circular pasture film becomes an adhesive layer. (2) Flatten the circular pasture film in the transverse direction to form a folded pasture film. Then cut open the front and rear ends of the folded pasture film to make the folded pasture film into two pasture films stacked together. The adhesive layers of the two pasture films stacked together are glued together. (3) The two pieces of pasture film stacked together pass vertically downward through the longitudinally extending horizontal clamping roller. After that, the two pieces of pasture film are peeled off. After peeling, the piece of pasture film on the left moves through the left guide roller and is wound up, and the piece of pasture film on the right moves through the right guide roller and is wound up. The left guide roller and the right guide roller are symmetrically arranged about the vertical plane passing through the clamping line of the horizontal clamping roller, so that the peeling line of the two pieces of pasture film is located directly below the clamping line of the horizontal clamping roller. Its features include: a preset lateral clearance between the left and right guide rollers that is less than half the vertical distance between the horizontal clamping line of the horizontal clamping rollers and the horizontal plane containing the central axes of the left and right guide rollers, so that the peeling lines of the two hay films are lower than the horizontal clamping rollers; The real-time tension f of one of the hay films after peeling is continuously monitored. A stationary industrial camera continuously captures images of the hay film near the peeling line, and the vertical position of the peeling line is analyzed in real time based on the captured video images. This allows the determination of the real-time vertical distance h between the peeling line and the horizontal plane containing the central axes of the left and right guide rollers. The real-time adhesive force F of the two hay films is continuously calculated using the following formula: F=fsin(x / 2), x=2arctan(m / 2h), where m is the lateral net distance between the right and left guide rollers, and x represents the angle between the two hay films during peeling. The amount of glue injected is adjusted and controlled online based on the calculated real-time adhesive force F.

2. A forage film blown film production process according to claim 1 characterised in that: If the calculated real-time adhesive force F exceeds the preset upper limit of the adhesive force threshold, the amount of adhesive injected is reduced; if the calculated real-time adhesive force F is lower than the preset lower limit of the adhesive force threshold, the amount of adhesive injected is increased.

3. A forage film blown film production process according to claim 1 or 2, characterised in that: The shooting direction of the industrial camera is perpendicular to the horizontal clamping line of the clamping rollers.

4. A forage film blown film production process according to claim 3, characterized in that: Industrial cameras shoot horizontally.

Images