Precise deviation rectifying structure for film tape casting

Abstract

The utility model discloses an accurate deviation rectifying structure for film tape casting, which is characterized in that racks are mounted on two sides of a deviation rectifying mounting seat, a multi-tooth gear and a few-tooth gear which are fixedly mounted at two ends of a deviation rectifying roller mandrel are respectively meshed with the corresponding racks, and the difference between the number of teeth of the multi-tooth gear and the number of teeth of the few-tooth gear is at least one; the two ends of the deviation rectifying roller core shaft are hinged to the deviation rectifying roller supporting rods on the corresponding sides through spherical hinge structures, each spherical hinge structure comprises a core shaft spherical hinge inner ring fixedly installed on the deviation rectifying roller core shaft and a core shaft spherical hinge outer ring fixedly installed on the deviation rectifying roller supporting rods, and the outer convex spherical surface of the core shaft spherical hinge inner ring is slidably supported on the inner concave spherical surface of the core shaft spherical hinge outer ring; and the deviation rectifying roller supporting rod is movably supported on the deviation rectifying mounting seat. The same ends of the deviation rectifying roller mandrels are hinged to the deviation rectifying roller supporting rods on the same end sides through the corresponding spherical hinge structures in a supporting mode. The deviation rectifying structure can accurately regulate and control the running direction of the conveying belt, and is particularly suitable for the cast film forming machine with the conveying belt.

Description

Technical Field

[0001] The utility model relates to film casting production equipment, in particular to a conveyor belt deviation correction device with an extruded film conveyor belt. Background Art

[0002] Roller-type film casting machines primarily consist of a casting roll, a pull-off roll, and a wind-up roll. There are two main casting processes: embossing the roll first and then cooling and shaping it; or cooling and shaping it first and then embossing it. Regardless of which process is used, the film casting equipment relies on a rotating cooling roll for cooling. However, since the contact angle and arc length between the film and the cooling roll are always fixed, the ideal cooling and shaping effect can only be achieved by reducing the cooling roll speed to extend the cooling time. However, this reduction in cooling roll speed inevitably leads to a decrease in the operating efficiency of the casting machine. Therefore, the existing structure of relying on the cooling roll to cool and shape the extruded film has become a bottleneck in improving the production efficiency of the casting machine.

[0003] The cast film conveyor belt structure allows the molten film to be extruded onto the conveyor belt for cooling and shaping. This not only effectively prolongs and controls the shaping time of the cast film, but also prevents the molten film from sticking to the rollers. However, as the extruded film on the cast film conveyor belt moves along the conveyor belt, the tension on both sides of the conveyor belt fluctuates, which can easily cause the extruded cast film to deviate from its original straight path. This not only causes wrinkles and ribs in the middle of the film, but also creates zigzag lines on both sides of the cast film, increasing the amount of cutting required later, resulting in a decrease in the cast film yield and serious waste of raw materials. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a film casting precision correction structure that can accurately control the running direction of the conveyor belt.

[0005] In order to solve the above technical problems, the utility model provides a precise correction structure for film cast molding, including a correction mounting seat, with racks installed on both sides of the relative sides of the correction mounting seat, and the multi-tooth gear and the small-tooth gear fixedly installed at both ends of the correction roller core shaft are respectively engaged with the corresponding racks, and the number of teeth of the multi-tooth gear and the small-tooth gear differs by at least one tooth; the two ends of the correction roller core shaft are hinged to the correction roller support rod on the corresponding side through a ball hinge structure, and the ball hinge structure includes a core shaft ball hinge inner ring fixedly installed on the correction roller core shaft, and a core shaft ball hinge outer ring fixedly installed on the correction roller support rod, the outer convex spherical surface of the core shaft ball hinge inner ring is slidably supported on the inner concave spherical surface of the core shaft ball hinge outer ring; the correction roller support rod is movably supported on the correction mounting seat.

[0006] Preferably, there are two correcting roller core shafts and two correcting roller support rods, and the same end of the correcting roller core shaft is hinged to the correcting roller support rod on the same end side through a corresponding ball joint structure; a correcting roller sleeve is rotatably supported on the correcting roller core shaft.

[0007] Preferably, both ends of the rack are provided with rack mounting waist grooves, and the rack mounting pin movably passes through the rack mounting waist grooves to mount the rack on the deviation correction mounting seat.

[0008] Preferably, the rack mounting waist groove on the rack is an arc-shaped through groove, and the two sections of the rack mounting waist groove on the same rack are located on the same circumference.

[0009] Preferably, the two parallel deflection correction roller core shafts are connected through a core shaft transmission pair; the deflection correction roller core shafts are connected to the deflection correction motor through a deflection correction roller drive pair.

[0010] Preferably, the deviation-correcting mounting seat is a rectangular frame structure, and a detection sensor is installed on the deviation-correcting mounting seat;

[0011] Preferably, both of the two correcting roller support rods are provided with support rod waist grooves, and the support rod pin passes through the support rod waist grooves of the two correcting roller support rods to movably mount the correcting roller support rods on the correcting mounting seat.

[0012] In the technical solution of the present invention, since the film conveyor belt bypasses the conveyor belt correcting device during its circumferential operation, the correcting roller on the conveyor belt correcting device operates differentially with the help of the differential teeth of the multi-tooth gear and the small-tooth gear, thereby achieving precise micro-adjustment of the direction of the correcting roller, so that different tension forces are generated on both sides of the conveyor belt, thereby adjusting the running direction of the film, so that the running path of the film always remains in the same straight line direction, which not only avoids the uneven stretching and wrinkling of the film surface caused by the curved operation of the film, but also avoids the waste of film material caused by the deviation of the film edge and the increase in the cutting amount of the film edge, thereby effectively improving the film finished product rate and avoiding the waste of film raw materials. The precise deviation-correcting structure enables the film conveyor belt to be used on a roller-type casting machine, and the casting machine equipped with the film conveyor belt can feed the molten extruded film onto the film conveyor belt for temperature-controlled casting and shaping. The molten film can obtain sufficient film shaping time on the conveyor belt without being restricted by the cooling wrap angle size and wrap angle arc length of the cooling roller. This can greatly improve the conveying speed of the film on the conveyor belt, thereby greatly improving the casting operation efficiency of the casting machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The precise deviation-correcting structure for film casting of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0014] Figure 1 This is a structural diagram of a specific embodiment of the thin film casting precision correction structure of the utility model;

[0015] Figure 2 yes Figure 1 A-direction view;

[0016] Figure 3 yes Figure 1 Structural diagram of the center deviation correction mounting seat;

[0017] Figure 4 yes Figure 3 B-direction view;

[0018] Figure 5 yes Figure 4 Enlarged view of middle part I;

[0019] Figure 6 yes Figure 5 A top view of

[0020] Figure 7 yes Figure 1 Installation structure diagram of the middle deviation-correcting roller sleeve;

[0021] Figure 8 yes Figure 7 Top view of .

[0022] In the figure, 1 is the deviation correction mounting seat, 2 is the multi-tooth gear, 3 is the rack, 4 is the rack mounting pin, 5 is the small-tooth gear, 6 is the core shaft transmission pair, 7 is the support rod pin seat, 8 is the support rod pin, 9 is the support rod waist groove, 10 is the deviation correction roller support rod, 11 is the core shaft ball joint inner ring, 12 is the core shaft ball joint outer ring, 13 is the deviation correction roller core shaft, 14 is the deviation correction roller sleeve, 15 is the deviation correction roller drive pair, 16 is the deviation correction motor, 17 is the rack mounting waist groove, 18 is the detection sensor. DETAILED DESCRIPTION

[0023] like Figure 1 — Figure 8 The film casting precision correction structure shown includes a correction mounting base 1 with a rectangular frame structure. When installed, the correction mounting base 1 is fixedly mounted on the conveyor belt support. Two sections of racks 3 are respectively mounted on the two opposite frame beams of the correction mounting base 1, so a total of four sections of racks 3 are mounted on the correction mounting base 1. Arc-shaped rack mounting waist grooves 17 are provided at both ends of the rack 3, and the rack mounting waist grooves 17 at both ends of the same rack 3 are located on the same circumference. The rack mounting pin 4 movably passes through the rack mounting waist groove 17 and is fixedly screwed to the frame beam of the correction mounting base 1. The pin body section of the rack mounting pin 4 located in the rack mounting waist groove 17 is covered with a sliding sleeve so that the rack 3 can swing slightly relative to the frame beam of the correction mounting base 1.

[0024] Two parallel correction roller rods 10 and two parallel correction roller core shafts 13 are arranged above the correction mounting base 1. The correction roller rods 10 and the correction roller core shaft 13 are arranged perpendicular to each other. Both ends of the correction roller core shaft 13 are hinged to the correction roller rods 10 at the corresponding ends through a ball hinge structure. The ball hinge structure includes a core shaft ball hinge inner ring 11 fixedly mounted on the correction roller core shaft 13 and a core shaft ball hinge outer ring 12 fixedly mounted on the correction roller rod 10. The outer convex spherical surface of the core shaft ball hinge inner ring 11 slides on the concave spherical surface of the core shaft ball hinge outer ring 12. The core shaft ball hinge inner ring 11 and the core shaft ball hinge outer ring 12 are both made of organic wear-resistant materials such as nylon.

[0025] A multi-tooth gear 2 and a small-tooth gear 5 are fixedly mounted on the shaft necks extending from the correction roller support rod 10 at both ends of the correction roller core shaft 13. The two multi-tooth gears 2 on the two correction roller core shafts 13 are located on the same side, and the multi-tooth gears 2 on the same side are respectively meshed with the racks 3 on the frame beam of the correction mounting seat 1 on the corresponding side; similarly, the two small-tooth gears 5 at the other ends of the two correction roller core shafts 13 are also meshed with the corresponding racks 3. In this embodiment, the multi-tooth gear 2 has 46 teeth, and the small-tooth gear 5 has 44 teeth. The number of teeth of the multi-tooth gear 2 is at least one more than the number of teeth of the small-tooth gear 5. When the correction roller core shaft 13 rotates, due to the difference in the number of teeth between the multi-tooth gear 2 and the small-tooth gear 5 at the two ends of the same correction roller core shaft 13, the axis of the correction roller core shaft 13 will exhibit a clockwise or counterclockwise correction micro-swing as the gears rotate in the forward or reverse direction. Since the difference in the number of teeth between the multi-tooth gear 2 and the small-tooth gear 5 is very small, even one tooth, precise deviation correction can be achieved.

[0026] The extended end of one correcting mandrel 13 is connected to a correcting motor 16 via a correcting roller drive pair 15. The other, ipsilateral extended ends of the two correcting roller mandrels 13 are connected to each other via a mandrel drive pair 6. Both the correcting roller drive pair 15 and the mandrel drive pair 6 utilize synchronous toothed belt transmissions, and the correcting motor 16 is a servo motor.

[0027] A detection sensor 18 is mounted on the frame of the deviation-correcting mounting seat 1 . The detection sensor 18 is a photoelectric sensor for detecting the running edge position of the film on the film conveyor belt.

[0028] When the film deviates from the normal conveying path, the detection sensor 18 sends a signal to the web-correction controller, which instructs the web-correction motor 16 to operate. This motor drives the two web-correction roller mandrels 13 via the web-correction roller drive pair 15 and the mandrel transmission pair 6. Due to the difference in the number of teeth on the multi-tooth gear 2 and the small-tooth gear 5 fixed at each end of the web-correction mandrel 13, the web-correction mandrel 13 deflects, correcting the web-correction effect on the film conveyor belt and the film thereon.

[0029] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. Numerous modifications and variations are possible based on the contents of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. All other embodiments derived by those skilled in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

Claims

1. A precise deviation-correcting structure for film casting, characterized by: The invention comprises a correction mounting seat (1), racks (3) are installed on opposite sides of the correction mounting seat (1), multi-tooth gears (2) and small-tooth gears (5) fixedly installed at both ends of the correction roller core shaft (13) are respectively meshed with corresponding racks (3), and the number of teeth of the multi-tooth gears (2) and small-tooth gears (5) differ by at least one tooth; the two ends of the correction roller core shaft (13) are hinged to the correction roller support rod (10) on the corresponding side through a ball hinge structure, and the ball hinge structure comprises a core shaft ball hinge inner ring (11) fixedly installed on the correction roller core shaft (13), and a core shaft ball hinge outer ring (12) fixedly installed on the correction roller support rod (10), the outer convex spherical surface of the core shaft ball hinge inner ring (11) is slidably supported on the inner concave spherical surface of the core shaft ball hinge outer ring (12); the correction roller support rod (10) is movably supported on the correction mounting seat (1).

2. The film casting precision correction structure according to claim 1, characterized in that: There are two correcting roller core shafts (13) and two correcting roller support rods (10), and the same end of the correcting roller core shaft (13) is hinged to the correcting roller support rod (10) on the same end side through a corresponding ball joint structure; a correcting roller sleeve (14) is rotatably supported on the correcting roller core shaft (13).

3. The film casting precision correction structure according to claim 1, characterized in that: Both ends of the rack (3) are provided with rack mounting waist grooves (17), and the rack mounting pin (4) movably passes through the rack mounting waist grooves (17) to mount the rack (3) on the deviation correction mounting seat (1).

4. The precise deviation-correcting structure for film casting according to claim 3, characterized in that: The rack mounting waist groove (17) on the rack (3) is an arc-shaped through groove, and the two sections of the rack mounting waist groove (17) on the same rack (3) are located on the same circumference.

5. The film casting precision correction structure according to claim 1, characterized in that: Two mutually parallel deviation-correcting roller core shafts (13) are connected in transmission via a core shaft transmission pair (6); the deviation-correcting roller core shaft (13) is connected in transmission via a deviation-correcting roller drive pair (15) to a deviation-correcting motor (16).

6. The film casting precision correction structure according to claim 1, characterized in that: The deviation-correcting mounting seat (1) is in a rectangular frame structure, and a detection sensor (18) is mounted on the deviation-correcting mounting seat (1).

7. The film casting precision correction structure according to claim 1, characterized in that: The two deflection-correcting roller support rods (10) are both provided with support rod waist grooves (9), and the support rod pin shaft (8) passes through the support rod waist grooves (9) of the two deflection-correcting roller support rods (10) to movably mount the deflection-correcting roller support rods (10) on the deflection-correcting mounting seat (1).

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