A material clamping mechanism for a rotary table blister machine

Abstract

The utility model discloses a kind of material clamping mechanisms for rotary table blister machine, it is related to double-layer blister production equipment technical field, including rotary table frame, the operation port circumferential of rotary table frame is movably installed with multiple clamping jaw parts, power drive device is fixed on the rotary table frame, the power drive device can provide driving force for the deflection of clamping jaw part, the clamping jaw part can form material clamping state with rotary table frame, the utility model is movably installed with multiple clamping jaw parts on the operation port circumferential of rotary table frame, and realizes the clamping of material sheet by the material clamping state of clamping jaw part controlled by power drive device, to be able to realize the clamping of thermoplastic plastic sheet at the bottom of rotary table, simple and convenient to operate, easy to maintain, with good practicability.

Description

Technical Field

[0001] This utility model relates to the technical field of double-layer vacuum forming production equipment, specifically to a clamping mechanism for a rotary vacuum forming machine. Background Technology

[0002] A rotary vacuum forming machine is a forming device that heats and softens thermoplastic sheets, then uses negative pressure to vacuum form them onto a corresponding mold. The machine is equipped with a rotary table that transfers the thermoplastic sheets at various stations. The rotary table has working openings that are compatible with the molds on the machine. The thermoplastic sheets cover the working openings, and the rotary table is equipped with corresponding clamping mechanisms to hold and fix the edges of the thermoplastic sheets.

[0003] The existing method of clamping sheet material involves pressing the sheet material against the edge of a vertically moving pressing frame on a turntable, thereby fixing the sheet material on the working port of the turntable. However, this method has the drawback that, due to the structural design of the pressing frame itself, thermoplastic sheets can only be fed from above the turntable, making the entire feeding process of thermoplastic sheets cumbersome and not simple enough. To solve the above problems, we have designed a new solution. Utility Model Content

[0004] The purpose of this invention is to provide a clamping mechanism for a rotary vacuum forming machine to address the aforementioned shortcomings in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A material clamping mechanism for a rotary vacuum forming machine includes a rotary frame. Multiple gripper portions are movably mounted on the working opening of the rotary frame in a circumferential direction. A power drive device is fixed on the rotary frame. The power drive device can provide driving force for the deflection of the gripper portions, and the gripper portions can form a clamping state with the rotary frame.

[0007] Preferably, a force-bearing seat corresponding to the gripper portion is fixed on the turntable frame, and there is a clamping space between the force-bearing seat and the gripper portion.

[0008] Preferably, the force-bearing seat has a groove, and the gripper has a rib that can be fitted and engaged with the groove. The groove and the rib can cause the sheet material to deform at the clamping position.

[0009] Preferably, the cross-section of the gripper portion is a triangular structure, and the gripper portion is hinged to the force-bearing seat.

[0010] Preferably, a transmission shaft that receives the output drive of a power drive device is rotatably mounted on the turntable frame. A first protrusion is fixed on the shaft body, and a second protrusion is hinged to the protruding movable end of the first protrusion. The protruding end of the second protrusion is movably hinged to the gripper portion.

[0011] Preferably, the first protrusion is a cam structure and the second protrusion is a connecting rod structure. When the force-bearing seat and the gripper are in the clamping state, the first protrusion and the second protrusion are at the deflection dead point position.

[0012] Preferably, the circumferential outline of the working port of the turntable frame is rectangular, the bottom end of the working port of the turntable frame is provided with a downward protrusion, and the force-bearing part is provided with a slot that is fixedly engaged with the downward protrusion.

[0013] Preferably, a plurality of bearing seats are movably sleeved on the transmission shaft, and each bearing seat is fixed to the turntable frame.

[0014] Preferably, the gripper portion is a long cylindrical structure, and a heat absorption port is provided on the cylindrical part of the gripper portion.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] In this invention, multiple gripper parts are movably installed around the working opening of the turntable frame, and the gripping state of the gripper parts is controlled by a power drive device to achieve the clamping of the material sheet. This allows for the clamping of thermoplastic plastic sheets at the bottom of the turntable. The operation is simple and convenient, easy to maintain, and has good practicality.

[0017] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0018] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 This is a top view of the rotary frame structure of the clamping mechanism for a rotary vacuum forming machine according to the present invention;

[0021] Figure 2This is a side view of the position of the gripper part of the clamping mechanism of the rotary vacuum forming machine on the rotary frame according to the present invention;

[0022] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 This is a schematic diagram of the cross-sectional structure of the gripper portion of the clamping mechanism for a rotary vacuum forming machine according to the present invention;

[0024] Figure 5 This is a partial side view of a clamping mechanism for a rotary vacuum forming machine according to the present invention.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Turntable frame; 2. Gripper part; 2.1. First protruding ridge; 2.2. Second protruding ridge; 2.3. Third protruding ridge; 3. Power drive device; 4. Force-bearing seat; 5. Rib groove; 6. Rib; 7. Drive shaft; 8. First protruding part; 9. Second protruding part; 10. Lowering part; 11. Slot part; 12. Bearing seat; 13. Working port; 14. Heat absorption port. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0028] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "comprising" or "including," and similar terms used in this disclosure, mean that an element or object preceding the term encompasses the elements or objects listed following the term and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0029] A rotary vacuum forming machine is a device used to process thermoplastic sheets into various shapes and attach them to the surface of products. Its rotary table is equipped with a corresponding clamping mechanism, which can automatically clamp and fix the sheet on the rotary table, so that the sheet can rotate with the rotary table to various workstations.

[0030] Specifically, the current automatic sheet feeding method involves using a suction cup plate with multiple suction cups to lift the sheet to a designated height. The suction cup plate then moves horizontally to directly above the feeding position of the turntable, where the sheet is placed on the working opening of the turntable. After the suction cup plate is removed, the turntable rotates to the position of the pressing frame, where the pressing frame presses against the edge of the sheet, thus fixing the sheet on the working opening of the turntable. However, in the existing solution, due to the structural design of the pressing frame, thermoplastic sheets can only be fed from above the turntable, making the entire thermoplastic sheet feeding process cumbersome and not concise, adding multiple steps and slowing down the overall processing rhythm. To solve the above problems, we have designed a new solution.

[0031] Please see Figures 1-5 This utility model provides a clamping mechanism for a turntable vacuum forming machine, including a turntable frame 1. Multiple gripper parts 2 are movably installed in the working port 13 of the turntable frame 1. A power drive device 3 is fixed on the turntable frame 1. The power drive device 3 can provide driving force for the deflection of the gripper parts 2. The gripper parts 2 can form a clamping state with the turntable frame 1.

[0032] Specifically, the turntable frame 1 is a circular frame parallel to the horizontal plane. The outline edge of the working port 13 of the turntable frame 1 is rectangular. The middle part of the turntable frame 1 is installed with the rotation drive platform of the turntable vacuum forming machine. The turntable frame 1 can be driven by the turntable vacuum forming machine and can rotate intermittently on the horizontal plane. The turntable frame 1 and the turntable vacuum forming machine are existing equipment and will not be described in detail.

[0033] In actual use, the thermoplastic sheet located at the bottom of the turntable frame 1 is in a state parallel to the horizontal plane. The thermoplastic sheet will be referred to as the sheet hereafter. Then, under the action of the suction cup loading robot, the sheet moves closer to the bottom surface of the turntable frame 1, thereby completely covering the working port 13 on the turntable frame 1. At this time, the power drive device 3 drives forward, so that the gripper 2 and the turntable frame 1 form a clamping state. The gripper 2 clamps and fixes the sheet on the bottom surface of the turntable frame 1. Similarly, when it is necessary to release the sheet, the power drive device 3 can be driven in reverse.

[0034] In other words, multiple gripper parts 2 are installed upward around the working port 13 of the turntable frame, and the clamping state of the gripper parts is controlled by the power drive device 3 to achieve the clamping of the material sheet. Thus, thermoplastic plastic sheets can be clamped at the bottom of the turntable, and thermoplastic plastic sheets can be fed from below the turntable. This greatly simplifies the number of steps in the sheet feeding process, making it simpler, easier to operate and maintain, and more practical.

[0035] In another embodiment of this utility model, a force-bearing seat 4 corresponding to the gripper part 2 is fixed on the turntable frame 1. The force-bearing seat 4 is fixed at the bottom position of the turntable frame 1. There is a clamping space between the force-bearing seat 4 and the gripper part 2. When the gripper part 2 and the force-bearing seat 4 are pressed together, the gripper part 2 is in the clamping state on the turntable frame 1.

[0036] Among them, a transmission shaft 7 is rotatably mounted on the turntable frame 1 to receive the output drive of the power drive device 3. The number of transmission shafts 7 is consistent with the number of edge lines of the working port 13. For example, when the edge line of the working port 13 is rectangular, the axis of each transmission shaft 7 is parallel to the corresponding edge line of the working port 13. A first protrusion 8 is fixed on the rod body of each transmission shaft 7. There are multiple first protrusions 8. The protruding movable end of the first protrusion 8 is hinged to a second protrusion 9. The protruding end of the second protrusion 9 is movably hinged to the gripper part 2.

[0037] The first protrusion 8 is a cam structure, and the second protrusion 9 is a connecting rod structure. When the force-bearing seat 4 and the gripper 2 are in the clamping state, the first protrusion 8 and the second protrusion 9 are at the deflection dead point position, thereby improving the firmness of the clamping state. The circumferential outline of the working opening 13 of the turntable frame 1 is a rectangular structure. Furthermore, a downward protrusion 10 is provided at the bottom edge of the working opening 13 of the turntable frame 1. The downward protrusion 10 is fixed to the bottom edge of the working opening 13 of the turntable frame 1. The downward protrusion 10 is a long columnar structure with a rectangular cross-section. The length of the probe 10 is aligned with the edge of the corresponding working opening 13. The force-bearing part 4 is provided with a slot 11 that is fixedly engaged with the lower probe 10. The slot 11 can be engaged and fixed with the lower probe 10. For example, after the slot 11 can be engaged and fixed with the lower probe 10, it can be further limited by corresponding limit bolts or pins. In addition, multiple bearing seats 12 are movably sleeved on the transmission shaft 7. Each bearing seat 12 is fixed to the turntable frame 1, so that the bearing seats 12 can ensure that the transmission shaft 7 can rotate axially.

[0038] In practical use, when the edge of the sheet material reaches the clamping space, the power drive device 3 drives in the forward direction, causing the transmission shaft 7 to rotate in the forward direction. The transmission shaft 7 drives the gripper 2 to deflect in the forward direction through the first protrusion 8 and the second protrusion 9, thereby putting the force seat 4 and the gripper 2 into a clamping state, thus clamping and fixing the sheet material in the clamping space. Similarly, when the power drive device 3 drives in the reverse direction, the transmission shaft 7 rotates in the reverse direction, and the transmission shaft 7 drives the gripper 2 to deflect in the reverse direction through the first protrusion 8 and the second protrusion 9, thereby putting the force seat 4 and the gripper 2 into a loose state, thus releasing the clamping of the sheet material in the clamping space.

[0039] In another embodiment of this utility model, the power drive device 3 is preferably a servo motor, which is easy to control. The output shaft of the servo motor is connected to the rod of the transmission shaft 7. The servo motor can accurately control the deflection speed and deflection angle of the transmission shaft 7, which is easy to operate.

[0040] In another embodiment of this utility model, the power drive device 3 can be selected as a linear drive mechanism such as a cylinder or an electric cylinder. In this linear drive mechanism, a corresponding rack is coaxially fixed on the output shaft, and a corresponding gear is adapted to mesh on the rack. The gear is coaxially fixed with the rod body of the transmission shaft 7, thereby providing driving force for the forward and reverse deflection of the gripper 2.

[0041] In another embodiment of this utility model, the length direction line of the force-bearing seat 4 is parallel to the axis of the transmission shaft 7, and the number of force-bearing seats 4 is the same as the number of transmission shafts 7. The force-bearing seat 4 is provided with a groove 5, the length direction line of the groove 5 is parallel to the length direction line of the force-bearing seat 4, and the gripper part 2 is provided with a rib 6 that can be adapted to and engaged with the groove 5. The groove 5 and the rib 6 can cause the sheet material to deform at the clamping position, thereby improving the clamping tightness of the sheet material in the clamping state. At the same time, during the clamping process, the sheet material is subjected to a certain pulling force on the horizontal plane, and the sheet material is in a flat state when clamped, which helps to improve the flatness of the sheet material in the clamping state, which is convenient for subsequent vacuum forming on the mold. In addition, compared with the traditional frame extrusion clamping method, this clamping method has the advantages of small clamping area and high clamping tightness. The small clamping area means that it is beneficial to improve the utilization rate of the sheet material, reduce material waste, save production costs, and is also conducive to green environmental protection.

[0042] In another embodiment of this utility model, the cross-section of the gripper 2 is a triangular structure, and the entire gripper 2 is a long column structure. Heat absorption ports 14 are provided on the column of the gripper 2. The number of heat absorption ports 14 is several. The heat absorption ports 14 facilitate rapid heat absorption by the sheet material in contact with the gripper 2, thereby accelerating the softening and deformation of the part of the sheet material in contact with the gripper 2, reducing clamping resistance, and making the clamping more secure. The length direction of the gripper 2 is parallel to the length direction of the force-bearing seat 4. The gripper 2 is hinged to the force-bearing seat 4. Specifically, the triangular structure on the cross-section of the gripper 2 consists of a first protruding ridge 2.1, a second protruding ridge 2.2, and a third protruding ridge 2.3. The ridge 6 is fixed to the first protruding ridge 2.1, the second protruding ridge 2.2 is hinged to the force-bearing seat 4, and the third protruding ridge 2.3 is hinged to the second protruding extension 9.

[0043] In practical use, when the drive shaft 7 rotates in the opposite direction, the second protruding part 9 generates a pulling force, causing the position of the second protruding ridge 2.2, which is hinged between the gripper part 2 and the force-bearing seat 4, to deflect in the opposite direction. The distance between the first protruding ridge 2.1 of the gripper part 2 and the force-bearing seat 4 increases until the straight plane between the first protruding ridge 2.1 and the second protruding ridge 2.2 is perpendicular to the horizontal plane. This is the endpoint of the reverse rotation of the drive shaft 7. At this point, the force-bearing seat 4 and the gripper part 2 are in a relaxed state, thus releasing the clamping force on the sheet material located in the clamping space. Similarly, when the drive shaft 7 rotates in the opposite direction... When the moving shaft 7 rotates in the forward direction, the second protrusion 9 generates a pushing force, which causes the position of the second protruding ridge 2.2, which is hinged to the gripper 2 and the force-bearing seat 4, to deflect in the forward direction. The distance between the first protruding ridge 2.1 of the gripper 2 and the force-bearing seat 4 decreases, and the first protruding ridge 2.1 and the force-bearing seat 4 are squeezed together, thereby clamping and fixing the sheet material located in the clamping space. It should be noted that, preferably, the heat absorption port 14 is located on the ridge of the first protruding ridge 2.1, thereby shortening the distance to the sheet material and accelerating the heat conduction to the clamped position of the sheet material.

[0044] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A clamping mechanism for a rotary vacuum forming machine, comprising a rotary frame (1), wherein the rotary frame (1) is provided with circumferentially distributed working openings (13), characterized in that: The turntable frame (1) has multiple gripper parts (2) movably mounted on the working port (13) in the circumferential direction. A power drive device (3) is fixed on the turntable frame (1). The power drive device (3) can provide driving force for the deflection of the gripper parts (2). The gripper parts (2) can form a clamping state with the turntable frame (1).

2. The clamping mechanism for a rotary vacuum forming machine according to claim 1, characterized in that, The turntable frame (1) is fixed with a force-bearing seat (4) corresponding to the gripper part (2), and there is a clamping space between the force-bearing seat (4) and the gripper part (2).

3. The clamping mechanism for a rotary vacuum forming machine according to claim 2, characterized in that, The force-bearing seat (4) is provided with a groove (5), and the gripper (2) is provided with a rib (6) that can be adapted to and engaged with the groove (5). The groove (5) and the rib (6) can cause the sheet material to deform at the clamping position.

4. The clamping mechanism for a rotary vacuum forming machine according to claim 2, characterized in that, The cross-section of the gripper (2) is a trident-shaped structure, and the gripper (2) is hinged to the force-bearing seat (4).

5. The clamping mechanism for a rotary vacuum forming machine according to claim 3, characterized in that, The turntable frame (1) is rotatably mounted with a transmission shaft (7) that receives the output drive from the power drive device (3). A first protrusion (8) is fixed on the shaft body of the transmission shaft (7). A second protrusion (9) is hinged to the protruding movable end of the first protrusion (8). The protruding end of the second protrusion (9) is movably hinged to the gripper part (2).

6. The clamping mechanism for a rotary vacuum forming machine according to claim 5, characterized in that, The first protrusion (8) is a cam structure, and the second protrusion (9) is a connecting rod structure. When the force seat (4) and the gripper (2) are in the clamping state, the first protrusion (8) and the second protrusion (9) are in the deflection dead point position.

7. The clamping mechanism for a rotary vacuum forming machine according to claim 2, characterized in that, The working port (13) of the turntable frame (1) has a rectangular outline. The bottom end of the working port (13) of the turntable frame (1) is provided with a downward protrusion (10). The force-bearing seat (4) is provided with a slot (11) that is fixedly engaged with the downward protrusion (10).

8. The clamping mechanism for a rotary vacuum forming machine according to claim 5, characterized in that, Multiple bearing seats (12) are movably sleeved on the transmission shaft (7), and each bearing seat (12) is fixed to the turntable frame (1).

9. The clamping mechanism for a rotary vacuum forming machine according to claim 1, characterized in that, The gripper part (2) is a long column structure, and a heat absorption port (14) is provided on the column of the gripper part (2).

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