Plastic inner pipe conveying device

Abstract

The invention discloses a plastic inner pipe conveying device, and relates to the technical field of plastic product production, the plastic inner pipe conveying device comprises a supporting wheel and a lower pressing wheel, a plastic inner pipe is sequentially wound on the supporting wheel and the lower pressing wheel, and the lower pressing wheel can rotate around the circle center of the supporting wheel; the lower pressing wheel downwards presses the plastic inner pipe under the action of gravity, so that the plastic inner pipe is in a tensioning state in the conveying process; the plastic inner pipe tensioning device has the beneficial effects that the lower pressing wheel can rotate around the circle center of the supporting wheel, the plastic inner pipe is pressed downwards under the action of gravity, the plastic inner pipe is controlled to be kept in a tensioning state in real time, then the phenomena such as deviation of the plastic inner pipe in the subsequent forming process are avoided, and the production forming quality is prevented from being reduced; the proportion between the first force arm and the second force arm can be adjusted, and then the pressure applied to the plastic inner pipe by the lower pressing wheel is adjusted, so that the plastic inner pipe is prevented from being damaged or broken.

Description

Technical Field

[0001] The invention relates to the technical field of plastic product production, in particular to a plastic inner tube conveying device. Background Art

[0002] During the processing of aluminum-plastic composite tubes, it is necessary to convey the plastic inner tube and the aluminum strip at the same time, and convey the plastic inner tube and the aluminum strip to the subsequent aluminum tube forming device respectively. However, the conveying speed of the plastic inner tube and the aluminum strip changes in real time during the conveying process. For example, when a single roll of aluminum strip needs to be replaced after use, this will inevitably lead to a slowdown in the conveying speed of the aluminum strip, so that the conveying speed of the plastic inner tube does not match the conveying speed of the aluminum strip. At this time, it is necessary to control the conveying speed of the plastic inner tube to be slowed down accordingly. However, there is a certain time difference between controlling the slowing down of the conveying speed of the plastic inner tube and the slowing down of the conveying speed of the aluminum strip. During this period of time, the conveying speed of the plastic inner tube is faster than the conveying speed of the aluminum strip, which makes the part of the plastic inner tube that has not been conveyed to the aluminum tube forming device too loose, thereby affecting the subsequent forming quality. Summary of the invention

[0003] The object of the present invention is to provide a plastic inner tube conveying device to solve the problems raised in the above background technology.

[0004] The present invention is achieved through the following technical solutions.

[0005] A plastic inner tube conveying device comprises a supporting wheel and a lower pressing wheel, wherein the plastic inner tube is sequentially wound around the supporting wheel and the lower pressing wheel, and the lower pressing wheel can rotate around the center of the supporting wheel. The lower pressing wheel presses the plastic inner tube downward under the action of gravity so that the plastic inner tube is in a tensioned state during the conveying process.

[0006] As a further improvement of the present invention, it also includes a rotating rod, the support wheel is arranged at one end of the rotating rod and is concentric with the rotating rod, a pressing rod is passed through the rotating rod, and the pressing wheel is arranged at one end of the pressing rod away from the rotating rod.

[0007] As a further improvement of the present invention, the end of the lower pressure rod passing through the rotating rod is a first force arm, the end of the lower pressure rod not passing through the rotating rod is a second force arm, the lower pressure wheel is arranged on the second force arm, and the ratio of the first force arm to the second force arm is adjustable.

[0008] As a further improvement of the present invention, a sliding rod is slidably arranged on the lower pressure rod, and the lower pressure wheel is arranged on the sliding rod and is concentric with the sliding rod.

[0009] As a further improvement of the present invention, it also includes a lateral steering unit, and the lateral steering unit is used to drive the supporting wheel and the lower pressure wheel to rotate lateraly.

[0010] As a further improvement of the present invention, the lateral steering unit includes a connecting seat, a steering seat is arranged on the connecting seat, the steering seat can be rotated laterally relative to the connecting seat, a mounting plate is arranged on the steering seat, and the rotating rod can be rotatably arranged on the mounting plate.

[0011] As a further improvement of the present invention, a rotation angle measuring device is provided on the mounting plate, and the rotation angle measuring device is used to measure the rotation angle of the rotating rod.

[0012] As a further improvement of the present invention, the steering seat includes a connecting plate and ear plates arranged at both ends of the connecting plate, and the mounting plate is arranged on the connecting plate and away from one side of the ear plate.

[0013] As a further improvement of the present invention, the ear plate includes an arc-shaped arc portion arranged at one end away from the connecting plate, an inclined extension portion connected with the arc portion and extending toward the connecting plate, and an arc-shaped abutment platform adapted to the arc portion is arranged on the connecting seat, and at least one end of the arc-shaped abutment platform is provided with an abutting arc-shaped protrusion for abutting the connection between the arc-shaped portion and the inclined extension portion when the steering seat rotates to a preset position.

[0014] As a further improvement of the present invention, a limit rod extending toward one side of the support wheel is provided on the side wall of the mounting plate, and a push rod is provided on the side wall of the rotating rod. When the rotating rod is rotated to a predetermined angle, the limit rod and the push rod abut against each other to limit the rotating rod from continuing to rotate.

[0015] Beneficial effects of the present invention: 1. In the present invention, the lower pressing wheel can rotate around the center of the supporting wheel and press the plastic inner tube downward under the action of gravity, and control the plastic inner tube to maintain a tensioned state in real time, thereby avoiding the phenomenon of the plastic inner tube being offset in the subsequent molding process, so as to avoid the reduction of production molding quality.

[0016] 2. In the present invention, the ratio between the first force arm and the second force arm can be adjusted, thereby adjusting the pressure applied by the lower pressure wheel to the plastic inner tube, thereby avoiding damage or breakage of the plastic inner tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to help understand the purpose and advantages of the present invention, wherein: Figure 1 It is a schematic diagram of the structure of an embodiment of the present invention; Figure 2 Schematic diagram of point A, point B and point C in an embodiment of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the conveying device in an embodiment of the present invention; Figure 4 Schematic diagram of the ear plate structure in an embodiment of the present invention.

[0018] Numbers in the figure: Support wheel 1, lower pressure wheel 2, plastic inner tube 3, rotating rod 4, lower pressure rod 5, first force arm 501, second force arm 502, sliding rod 6, connecting seat 7, arc-shaped abutment platform 701, abutment arc-shaped protrusion 702, steering seat 8, mounting plate 9, connecting plate 801, ear plate 802, arc-shaped portion 8011, inclined extension portion 8012, limiting rod 10, abutment rod 11, and rotation angle measuring device 12. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below based on the accompanying drawings and implementation examples.

[0020] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. The words "inside" and "outside" refer to the direction toward or away from the geometric center of a specific component, respectively. They are relative concepts, and therefore may change accordingly according to different locations and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0021] refer to Figures 1 to 4 , the embodiments of the present invention disclose: A plastic inner tube conveying device comprises a supporting wheel 1 and a lower pressing wheel 2, wherein a plastic inner tube 3 is sequentially wound around the supporting wheel 1 and the lower pressing wheel 2, wherein the lower pressing wheel 2 can rotate around the center of the supporting wheel 1, and the lower pressing wheel 2 is subjected to the action of gravity to press the plastic inner tube 3 downward so that the plastic inner tube 3 is in a tensioned state during the conveying process; the plastic inner tube 3 is sequentially wound around the supporting wheel 1 and the lower pressing wheel 2, and when the conveying speed of the plastic inner tube 3 does not match the conveying speed of the aluminum strip, specifically as follows Figure 2As shown, in this embodiment, point A, point B, and point C are respectively provided, point A corresponds to the supporting wheel 1, point C corresponds to the lower pressing wheel 2, and point B corresponds to the aluminum tube forming device in the subsequent process, the plastic inner tube 3 is input to point A at a first initial speed, and the plastic inner tube 3 is output from point B at a second initial speed. In normal operation, the first initial speed is equal to the second initial speed. At this time, the plastic inner tube 3 is in a taut state between point A and point B, and supports the lower pressing wheel 2 at point C. When a single roll of aluminum strip needs to be replaced after use (the replacement time is 2-3 seconds), at this time, the output speed of point B is reduced in a short time (that is, the forming speed at the aluminum tube forming device is controlled to slow down), and at this time, point A will still normally input the plastic inner tube 3 at the original initial speed, and the plastic inner tube 3 between point A and point B has a surplus, so that the plastic inner tube 3 becomes loose and droops. At this time, C The lower pressing wheel 2 at point C droops due to the action of gravity and continues to press down the plastic inner tube 3, so that the plastic inner tube 3 remains in a tensioned state; and when the aluminum strip at point B is connected, the output speed of point B gradually recovers (the forming speed at the aluminum tube forming device is controlled to gradually recover), but at this time, only the lower pressing wheel 2 at point C can be guaranteed not to drop any more. Therefore, after the strip connection at point B is completed, the speed at point B is controlled to be greater than that at point A for transportation. At this time, the plastic inner tube 3 will be re-tensioned, and the lower pressing wheel 2 will be gradually lifted to reset the lower pressing wheel 2, and then the output speed at point B can be adjusted to be the same as the input speed at point A. In this embodiment, the lower pressing wheel 2 can rotate around the center of the supporting wheel 1 and press the plastic inner tube 3 downward under the action of gravity, and control the plastic inner tube 3 to remain in a tensioned state in real time, thereby avoiding the phenomenon of displacement of the plastic inner tube 3 in subsequent molding processes, so as to avoid a reduction in production molding quality.

[0022] Specifically, in the present embodiment, a rotating rod 4 is provided, the supporting wheel 1 is provided at one end of the rotating rod 4 and is concentric with the rotating rod 4, a pressing rod 5 is passed through the rotating rod 4, and the pressing wheel 2 is provided at the end of the pressing rod 5 away from the rotating rod 4; and in the present embodiment, the rotating rod 4 can be relatively rotated, so that the end of the pressing rod 5 away from the rotating rod 4 can fall under the action of gravity, thereby causing the pressing wheel 2 to press the plastic inner tube 3.

[0023] In this embodiment, due to the different bearing capacities of plastic inner tubes 3 of different sizes, if the gravity exerted by the lower pressure wheel 2 carried by the plastic inner tube 3 on the plastic inner tube 3 is too heavy, it is easy to cause damage to the plastic inner tube 3 or even cause the plastic inner tube 3 to break. Based on this, in this embodiment, the end of the lower pressure rod 5 passing through the rotating rod 4 is a first force arm 501, and the end of the lower pressure rod 5 not passing through the rotating rod 4 is a second force arm 502. The lower pressure wheel 2 is arranged on the second force arm 502, and the ratio of the first force arm 501 to the second force arm 502 is adjustable. As shown in the figure, the rotating rod 4 can rotate relatively, and has the first lever arm 501 and the second lever arm 502 on both sides thereof, and the three form a lever structure with the rotating rod 4 as the fulcrum. It can be seen that the longer the length of the first lever arm 501 without the lower pressure wheel 2 is adjusted, the shorter the length of the second lever arm 502 is. At this time, the pressure applied by the lower pressure wheel 2 arranged on the second lever arm 502 to the plastic inner tube 3 can also be reduced accordingly (the plastic inner tube 3 can be pressed down so that the plastic inner tube 3 is in a tensioned state), thereby avoiding damage or breakage of the plastic inner tube 3.

[0024] Correspondingly, according to the principle of the lever, the position of the lower pressure wheel 2 on the sliding rod 6 can also be adjusted to adjust the gravity applied by the lower pressure wheel 2 to the plastic inner tube 3. In the present embodiment, a sliding rod 6 is slidingly arranged on the lower pressure rod 5, and the lower pressure wheel 2 is arranged on the sliding rod 6 and is concentric with the sliding rod 6. The sliding rod 6 can be slid to a predetermined position of the lower pressure rod 5 and then locked by bolts. The structure is simple and the adjustment is convenient.

[0025] In addition, the present embodiment also includes a lateral steering unit, which is used to drive the support wheel 1 and the lower pressure wheel 2 to rotate laterally; the lateral steering unit includes a connecting seat 7, and a steering seat 8 is arranged on the connecting seat 7, and the steering seat 8 can rotate laterally relative to the connecting seat 7. In the present embodiment, the connecting seat 7 is used to be fixedly connected and installed on the output end of the plastic inner tube 3 conveying device, and the steering seat 8 is rotatably arranged on the connecting seat 7, and a mounting plate 9 is arranged on the steering seat 8. The rotating rod 4 can be rotatably arranged on the mounting plate 9, so that the rotating rod 4 can be controlled to be directed toward the aluminum tube forming device in the subsequent process.

[0026] Specifically implemented in this embodiment is that the steering seat 8 includes a connecting plate 801 and ear plates 802 arranged at both ends of the connecting plate 801, the mounting plate 9 is arranged on the connecting plate 801 and away from the ear plate 802, and one end of the connecting seat 7 is hinged between the ear plates 802 at both ends.

[0027] Since in the present embodiment, the steering seat 8 is relatively rotatably arranged on the connecting seat 7, but during the rotation process, the lower pressure rod 5 will drive the plastic inner tube 3 to move. If it rotates excessively, it will pull the plastic inner tube 3 and make the pulling inner tube tighten in the lateral direction, which may further cause the pulling inner tube to be damaged or broken. Based on this, the ear plate 802 includes an arc-shaped arc portion 8011 arranged at one end away from the connecting plate 801, and an inclined extension portion 8012 connected with the arc portion 8011 and extending toward the connecting plate 801. The connecting seat 7 is provided with an arc-shaped abutting platform 701 adapted to the arc portion 8011, and at least one end of the arc-shaped abutting platform 701 is provided with an abutting arc-shaped protrusion 702 for abutting the connection between the arc portion 8011 and the inclined extension portion 8012 when the steering seat 8 is rotated to a preset position; Figure 3 As shown, the arc-shaped abutment platform 701 has an inwardly recessed arc-shaped groove, which is adapted to the arc-shaped portion 8011 so that the arc-shaped portion 8011 can rotate in the arc-shaped groove, while the inclined extension portion 8012 is completely located outside the arc-shaped groove. When the steering seat 8 rotates to a preset position, the abutting arc-shaped protrusion 702 on at least one side of the arc-shaped groove can abut the connection between the arc-shaped portion 8011 and the inclined extension portion 8012, thereby limiting the steering seat 8 from continuing to rotate, thereby preventing the plastic inner tube 3 from being damaged or broken due to excessive tension.

[0028] A limit rod 10 extending toward one side of the support wheel 1 is provided on the side wall of the mounting plate 9, and a push rod 11 is provided on the side wall of the rotating rod 4. When the rotating rod 4 rotates to a predetermined angle, the limit rod 10 and the push rod 11 abut against each other to limit the rotating rod 4 from continuing to rotate.

[0029] A rotation angle measuring device 12 (rotation angle measuring instrument) is provided on the mounting plate 9. The rotation angle measuring device 12 is used to measure the rotation angle of the rotating rod 4. Specifically, the sensing end of the rotation angle measuring device matches the end of the rotating rod 4 close to the mounting plate 9. The rotation angle of the rotating rod 4 is measured. The rotation angle of the rotating rod 4 is measured. The rotation angle measuring device 12 has a signal transmission unit for transmitting information. In this embodiment, a controller is also provided on one side of the transmission device for processing the information transmitted by the rotation angle measuring device 12.

[0030] Finally, it should be noted that the above implementation cases are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned implementation cases, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned implementation cases, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the implementation cases of the present invention.

Claims

1. A plastic inner tube conveying device, characterized in that: It comprises a support wheel (1) and a lower pressing wheel (2), wherein a plastic inner tube (3) is arranged around the support wheel (1) and the lower pressing wheel (2) in sequence, and the lower pressing wheel (2) can rotate around the center of the support wheel (1). The lower pressing wheel (2) presses the plastic inner tube (3) downward under the action of gravity, so that the plastic inner tube (3) is in a tensioned state during the conveying process.

2. A plastic inner tube conveying device according to claim 1, characterized in that: It also comprises a rotating rod (4), the supporting wheel (1) being arranged at one end of the rotating rod (4) and being concentric with the rotating rod (4), a pressing rod (5) being passed through the rotating rod (4), and the pressing wheel (2) being arranged at one end of the pressing rod (5) away from the rotating rod (4).

3. A plastic inner tube conveying device according to claim 2, characterized in that: The end of the pressing rod (5) passing through the rotating rod (4) is a first lever arm (501), and the end of the pressing rod (5) not passing through the rotating rod (4) is a second lever arm (502). The pressing wheel (2) is arranged on the second lever arm (502), and the ratio of the first lever arm (501) to the second lever arm (502) is adjustable.

4. A plastic inner tube conveying device according to claim 3, characterized in that: A sliding rod (6) is slidably arranged on the lower pressure rod (5), and the lower pressure wheel (2) is arranged on the sliding rod (6) and is concentric with the sliding rod (6).

5. A plastic inner tube conveying device according to claim 2, characterized in that: It also comprises a lateral steering unit, which is used to drive the supporting wheel (1) and the lower pressure wheel (2) to rotate in a lateral direction.

6. A plastic inner tube conveying device according to claim 5, characterized in that: The lateral steering unit comprises a connecting seat (7), a steering seat (8) is arranged on the connecting seat (7), the steering seat (8) can be laterally rotated relative to the connecting seat (7), a mounting plate (9) is arranged on the steering seat (8), and the rotating rod (4) can be rotatably arranged on the mounting plate (9).

7. A plastic inner tube conveying device according to claim 6, characterized in that: A rotation angle measuring device is provided on the mounting plate (9), and the rotation angle measuring device is used to measure the rotation angle of the rotation rod (4).

8. A plastic inner tube conveying device according to claim 6, characterized in that: The steering seat (8) comprises a connecting plate (801) and ear plates (802) arranged at both ends of the connecting plate (801); the mounting plate (9) is arranged on the connecting plate (801) and away from a side of the ear plate (802).

9. A plastic inner tube conveying device according to claim 8, characterized in that: The ear plate (802) comprises an arc-shaped arc portion (8011) provided at one end away from the connecting plate (801), and an inclined extension portion (8012) connected with the arc portion (8011) and extending toward the connecting plate (801); an arc-shaped abutment platform (701) adapted to the arc portion (8011) is provided on the connecting seat (7); and at least one end of the arc-shaped abutment platform (701) is provided with an abutting arc-shaped protrusion (702) for abutting the connection between the arc portion (8011) and the inclined extension portion (8012) when the steering seat (8) rotates to a preset position.

10. A plastic inner tube conveying device according to claim 9, characterized in that: A limiting rod (10) is provided on the side wall of the mounting plate (9) and extends toward one side of the supporting wheel (1), and a resisting rod (11) is provided on the side wall of the rotating rod (4). When the rotating rod (4) is rotated to a predetermined angle, the limiting rod (10) and the resisting rod (11) resist each other to limit the rotating rod (4) from further rotation.

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