Paper container forming equipment

Abstract

The utility model discloses paper container forming equipment which comprises a machine frame and a pressing unit, the pressing unit comprises a pressing die and a pressed die which can be combined oppositely, the pressing die is in transmission connection with a pressing driving mechanism, the pressing driving mechanism comprises a driving motor, a lead screw synchronizing wheel, a vertical lead screw and a lead screw seat, and the output end of the driving motor is in transmission connection with the lead screw synchronizing wheel. The screw rod synchronizing wheel is fixedly connected with a vertical screw rod, the vertical screw rod is in threaded fit with a liftable screw rod seat, and the screw rod seat drives the pressing die to move up and down; a controller is arranged on the rack, the controller controls the driving motor to drive the pressing die in the pressing stroke in a segmented mode, the driving motor has a first driving state and a second driving state, and the driving motor drives the pressing die to move downwards along the acceleration section in the first driving state; in a second driving state, the driving motor drives the pressing die to move to a die closing end point along the speed reducing section; the stroke length of the acceleration section is larger than that of the deceleration section. The controller controls the driving motor of the pressing driving unit to drive the accelerating section of the pressing die to be longer than the decelerating section, so that the single pressing period is shortened, and the production efficiency is improved.

Description

A paper container forming equipment Technical Field

[0001] This utility model relates to the field of paper container forming, and in particular to a paper container forming equipment. Background Technology

[0002] Traditional paper container forming equipment uses hydraulic cylinders to drive the clamping mold and the receiving mold, which suffers from bottlenecks such as low efficiency and slow response. The hydraulic system relies on oil pumps and valves, and the hydraulic drive depends on the flow and pressure of hydraulic oil. The acceleration / deceleration strokes need to be symmetrically designed to maintain pressure stability, making it difficult to shorten the single forming cycle. At the same time, changes in oil temperature and valve lag can easily cause mold closing deviations, making it difficult to meet the high precision requirements of thin-walled and irregularly shaped paper bowls. Existing optimization methods (such as improving the pump station or proportional valve) are limited by the hydraulic principle, and the room for improvement in efficiency and speed is small. Summary of the Invention

[0003] This invention addresses the shortcomings of existing technologies by providing a paper container forming device that improves paper pressing efficiency while ensuring forming quality.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A paper container forming device includes a frame and a pressing unit. The pressing unit is mounted on the frame and includes a mating die and a receiving die. The die is driven by a pressing drive mechanism that drives its lifting and lowering. The pressing drive mechanism includes a drive motor, a lead screw synchronous pulley, a vertical lead screw, and a lead screw seat. The output end of the drive motor is driven by the lead screw synchronous pulley. The lead screw synchronous pulley is fixedly connected to the vertical lead screw. A liftable lead screw seat is threaded onto the vertical lead screw. The rod seat drives the pressing die to move up and down; the frame is equipped with a controller, which is connected to the drive motor. The controller controls the drive motor to drive the pressing die in segments during the pressing stroke. The drive motor has a first driving state and a second driving state. The first driving state corresponds to the stroke of the acceleration segment, and the second driving state corresponds to the stroke of the deceleration segment. In the first driving state, the drive motor drives the pressing die to move downward along the acceleration segment. In the second driving state, the drive motor drives the pressing die to move along the deceleration segment to the end of the mold closing segment. The stroke length of the acceleration segment is greater than the stroke length of the deceleration segment.

[0005] This invention utilizes a pressing drive unit to drive a pressing die downwards and close it with the receiving die, thereby achieving material pressing and forming. During the downward pressing stroke, the controller controls the driving motor of the pressing drive unit to drive the pressing die in an acceleration phase that is longer than the deceleration phase, shortening the single pressing cycle and thus improving production efficiency. The vertical lead screw and lead screw synchronous pulley, combined with the driving motor, provide high transmission efficiency and precise positioning of the driving motor-driven pressing die, ensuring molding quality.

[0006] Preferably, the controller sets the acceleration time and deceleration time, wherein the acceleration time is greater than the deceleration time, the drive motor is in a first driving state during the acceleration time, and the drive motor is in a second driving state during the deceleration time.

[0007] Preferably, the frame is also equipped with a controller and a position sensor. The controller is signal-connected to the position sensor, which detects the stroke position of the die in real time. The controller controls the drive mode of the drive motor based on the signal feedback from the position sensor. The position sensor senses the stroke position of the die, enabling precise control of the drive motor to drive the die in segments at the same switching point.

[0008] Furthermore, two lifting guide rods are fitted onto the mounting plate of the frame. The bottom of each lifting guide rod is fixedly connected to both ends of the lead screw seat. The lifting guide rods penetrate the mounting plate and extend beyond its top surface. A position sensor is mounted on the top of the mounting plate and is used to detect the position of the lifting guide rods. The lifting guide rods are fixedly connected to the lead screw seat, directly reflecting the displacement of the die. The position sensor detects the position of the die by detecting the top position of the lifting guide rods. The layout is reasonable, and the position sensor is located at the top, making debugging convenient.

[0009] Preferably, the frame has at least two forming stations, each equipped with an independent pressing unit and a corresponding pressing drive mechanism. Simultaneous operation of multiple stations improves work efficiency, and the same material can be pressed multiple times through multiple stations, increasing the yield.

[0010] Preferably, the pressure mold is fixedly mounted on the upper mold support plate, and the upper mold support plate is connected to the lead screw seat through a connecting rod assembly.

[0011] Based on the linkage assembly, the linkage assembly includes a pressure arm linkage, a left linkage, an upper left linkage, a lower left linkage, a right linkage, an upper right linkage, and a lower right linkage; the pressure arm linkage is fixedly installed at the bottom of the lead screw seat; the left and right linkages are respectively hinged to both ends of the pressure arm linkage; the other end of the left linkage is coaxially hinged to one end of the upper left linkage and the lower left linkage, the other end of the upper left linkage is hinged to the mounting plate of the frame, and the other end of the lower left linkage is hinged to the upper mold support plate; the other end of the right linkage is coaxially hinged to one end of the upper right linkage and the lower right linkage, the other end of the upper right linkage is hinged to the mounting plate of the frame, and the other end of the lower right linkage is hinged to the upper mold support plate.

[0012] Based on the linkage assembly, two sets of linkage assemblies are provided, and the linkage assemblies are respectively distributed at the front and rear ends of the lead screw seat.

[0013] Based on the connecting rod assembly, a vertical guide column is fixedly provided on the frame. The vertical guide column is located on both sides of the connecting rod assembly, and the upper mold support plate slides with the vertical guide column through a linear bearing.

[0014] Preferably, a plurality of adjustable positioning baffles are provided along the circumference of the compression mold. The positioning baffles are adjustable and fixed relative to the center position of the compression mold by an adjusting component. The positioning baffles form a positioning cavity to position the paper blank and ensure the yield rate.

[0015] Furthermore, the adjustment assembly includes a guide groove and a bolt. The positioning baffle has a guide groove and moves along the guide groove relative to the center position of the pressure mold. The bolt passes through the guide groove to fix the positioning baffle on the frame. Attached Figure Description

[0016] Figure 1 is a structural schematic diagram of this utility model.

[0017] Figure 2 is a perspective view of the paper pressing drive mechanism of this utility model.

[0018] Figure 3 is a schematic diagram of the multi-station paper pressing drive mechanism of this utility model.

[0019] The names of the body parts referred to by the numbers in the above attached diagrams are as follows:

[0020] The components include: 1. Frame; 101. Mounting plate; 2. Drive motor; 3. Lead screw and synchronous pulley; 4. Vertical lead screw; 5. Lead screw seat; 6. Position sensor; 7. Lifting guide rod; 8. Upper mold support plate; 9. Linkage assembly; 91. Pressure arm link; 92. Left link; 93. Upper left linkage rod; 94. Lower left linkage rod; 95. Right link; 96. Upper right linkage rod; 97. Lower right linkage rod; 10. Vertical guide rod; 11. Positioning baffle; 12. Vertical plate; 13. Pressing mold; 14. Pressure mold. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0022] A paper container forming device includes a frame 1 and a pressing unit. The pressing unit is mounted on the frame 1 and includes a mating die 13 and a receiving die 14. The die 13 is positioned above the receiving die 14. The die 13 is connected to a pressing drive mechanism that drives its lifting and lowering. The pressing drive mechanism drives the die 13 to move up and down relative to the receiving die 14, pressing the paper sheet into a paper container (paper bowl, paper box, etc.). The pressing drive mechanism includes a drive motor 2, a lead screw synchronous pulley 3, a vertical lead screw 4, and a lead screw seat 5. The output end of the drive motor 2 is connected to the lead screw synchronous pulley 3. The output end of the drive motor 2 is coaxially arranged with a drive wheel. The drive wheel and the lead screw synchronous pulley 3 are connected by a transmission belt. The lead screw synchronous pulley 3 is fixedly connected to the vertical lead screw 4 and is fixedly mounted at one end of the vertical lead screw 4, driving the vertical lead screw 4 to rotate. The vertical lead screw 4 is threaded with a liftable lead screw seat 5. The lead screw seat 5 drives the pressing die 13 to move up and down. The pressing die 13 can be directly set on the lead screw seat 5. In order to ensure that the pressing die 13 presses down in parallel, the pressing die 13 is fixedly set on the upper die support plate 8. The upper die support plate 8 and the lead screw seat 5 are connected by a connecting rod assembly 9. The pressing die 13 and the lead screw seat 5 are connected by a connecting rod assembly 9 to avoid the pressing die 13 being subjected to force at a single point, which would result in uneven thickness of the paper container wall. Specifically, the linkage assembly 9 includes a pressure arm linkage 91, a left linkage 92, a left upper linkage 93, a left lower linkage 94, a right linkage 95, a right upper linkage 96, and a right lower linkage 97; the pressure arm linkage 91 is fixedly mounted at the bottom of the lead screw seat 5; the left linkage 92 and the right linkage 95 are respectively hinged to both ends of the pressure arm linkage 91; the other end of the left linkage 92 is coaxially hinged to one end of the left upper linkage 93 and the left lower linkage 94, the other end of the left upper linkage 93 is hinged to the mounting plate 101 of the frame 1, and the other end of the left lower linkage 94 is hinged to the upper mold support plate 8; the other end of the right linkage 95 is coaxially hinged to one end of the right upper linkage 96 and the right lower linkage 97, the other end of the right upper linkage 96 is hinged to the mounting plate 101 of the frame 1, and the other end of the right lower linkage 97 is hinged to the upper mold support plate 8. The hinged arrangement between the connecting rods reduces the reverse impact force between the pressure mold 13 and the pressure-bearing mold 14 at the mold closing end, ensuring the service life of the drive motor 2. Furthermore, the arrangement of the left and right connecting rod units 95 prevents the pressure mold 13 from tilting, ensuring a high yield rate. To reduce the load on a single connecting rod assembly 9, two sets of connecting rod assemblies 9 are provided, respectively distributed at the front and rear ends of the lead screw seat 5.

[0023] The frame 1 is equipped with a controller, which is signal-connected to the drive motor 2. The controller controls the drive motor 2 to drive the die 13 in segments during the pressing stroke. The drive motor 2 has a first driving state and a second driving state. The first driving state corresponds to the acceleration segment, and the second driving state corresponds to the deceleration segment. In the first driving state, the drive motor 2 drives the die 13 to move downward along the acceleration segment. In the second driving state, the drive motor 2 drives the die 13 to move along the deceleration segment to the mold closing end point. The stroke length of the acceleration segment is greater than that of the deceleration segment. The drive motor 2 directly drives the vertical lead screw 4 to move the die 13 up and down, which has a fast response and can increase the stroke length of the acceleration segment during the pressing stroke, thereby shortening the single pressing cycle and improving production efficiency. In order to make the stroke length of the acceleration segment greater than that of the deceleration segment, the acceleration time and deceleration time can be set by the controller. By adjusting the ratio of the acceleration time and deceleration time of the drive motor 2, the acceleration time is made greater than the deceleration time. The stroke length of the acceleration segment of the die 13 during the pressing stroke can be adaptively greater than that of the deceleration segment, thus shortening the single pressing cycle. To accurately control the switching state of the drive motor 2, a position sensor 6 is also provided on the frame 1. The controller is signal-connected to the position sensor 6. The position sensor 6 detects the stroke position of the die 13 in real time, and the controller controls the drive state of the drive motor 2 based on the signal feedback from the position sensor 6. There is a switching point between the acceleration and deceleration sections. The position sensor 6 can be set to the position of the frame 1 corresponding to the switching point of the die 13 during the pressing stroke. The position sensor 6 detects whether the die 13 has reached the switching point and feeds the detection signal back to the controller, thereby achieving precise control of the drive motor 2 to switch its drive state. The position sensor 6 can also be set on the top of the frame 1. Specifically, two lifting guide rods 7 are sleeved on the mounting plate 101 of the frame 1. The bottom of the lifting guide rod 7 is fixedly connected to both ends of the lead screw seat 5. The lifting guide rod 7 passes through the mounting plate 101 and extends out of the top surface of the mounting plate 101. A first linear bearing is fixedly set on the mounting plate 101. The lifting guide rod 7 slides on the mounting plate 101 through the first linear bearing. The position sensor 6 is set on the top of the mounting plate 101. The position sensor 6 can be set on the mounting plate 101 through the upright plate 12. A vertical guide groove is opened on the upright plate 12. The position sensor 6 can be adjusted up and down on the upright plate 12 to adapt to different specifications of materials. The position of the position sensor 6 corresponds to the switching point position. The position sensor 6 is used to detect the position of the lifting guide rod 7. The position sensor 6 detects the top of the lifting guide rod 7 in real time. When the position sensor 6 can no longer detect the lifting guide rod 7, it feeds back to the controller. The controller controls the drive motor 2 to enter the second drive state to decelerate the mold 13. The position sensor 6 can be a photoelectric sensor or an encoder, installed at the end of the lead screw, and calculates the displacement of the die 13 by detecting the rotation angle of the lead screw.

[0024] To improve production efficiency, the frame 1 is equipped with at least two forming stations, each with an independent pressing unit and a corresponding pressing drive mechanism. Multiple forming stations can operate simultaneously, increasing work efficiency. Alternatively, the same material can be pressed and formed multiple times through the various stations by manual labor or a robotic arm, ensuring the quality of the finished product.

[0025] To ensure stable movement of the die 13, vertical guide columns are fixedly installed on the frame 1. These vertical guide columns are located on both sides of the connecting rod assembly 9, and the upper die support plate 8 is slidably engaged with the vertical guide columns via linear bearings. The vertical guide columns constrain the vertical movement of the upper die support plate 8, ensuring stable movement of the die 13.

[0026] To ensure the quality of material forming, several adjustable positioning baffles 11 are provided around the circumference of the pressure mold 14. Four sets of positioning baffles 11 are arranged around the circumference of the pressure mold 14. The positioning baffles 11 are adjustable and fixed relative to the center position of the pressure mold 14 via an adjusting assembly. Specifically, the adjusting assembly includes guide grooves and bolts. The positioning baffles 11 have guide grooves, and the positioning baffles 11 move along the guide grooves relative to the center position of the pressure mold 14. The bolts pass through the guide grooves to fix the positioning baffles 11 to the frame 1. The positioning baffles 11 on the left and right sides of the pressure mold 14 can move left and right, or the positioning baffles 11 on the front and rear sides of the pressure mold 14 can be adjusted back and forth in the front-rear direction. After adjustment, they are fixed by bolts. Alternatively, the adjusting assembly can be an automatic adjustment by a motor or cylinder. The circumferentially arranged positioning baffles 11 position the paper sheet to prevent it from shifting and affecting the yield.

[0027] The working principle of this utility model is described below with reference to the accompanying drawings: The pressing mold 13 is set above the receiving mold 14. In the initial state, the pressing mold 13 is in the initial position, and the paper sheet is placed between the positioning baffles 11. During operation, the drive motor 2 drives the lead screw synchronous wheel 3 and the vertical lead screw 4 to rotate, driving the lead screw seat 5 and the pressing mold 13 to descend rapidly. The controller controls the operation state of the drive motor 2 in segments according to the displacement signal of the pressing mold 13 fed back in real time by the position sensor 6. When the position sensor 6 at the switching point detects the lifting guide rod 7 in real time, the drive motor 2 is in the first driving state (acceleration state), driving the pressing mold 13 to accelerate downward; when the position sensor 6 at the switching point does not detect the lifting guide rod 7, it feeds back to the controller to control the drive motor 2 to switch to the second driving state (deceleration state), so that the pressing mold 13 gradually decelerates until the mold closing end point, and the paper container is pressed and formed. During the movement of the pressing mold 13, the vertical guide column and the linear bearing ensure the vertical movement accuracy of the pressing mold 13.

[0028] In the description of this invention, it should be understood that the terms "center," "length," "width," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] In summary, the above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall fall within the scope of the patent of the present utility model.

Claims

1. A paper container forming device, comprising a frame (1) and a pressing unit, wherein the pressing unit is disposed on the frame (1), the pressing unit comprising a mating die (13) and a pressing die (14), the die (13) being connected to a pressing drive mechanism for driving its lifting and lowering, characterized in that: The pressing drive mechanism includes a drive motor (2), a lead screw synchronous pulley (3), a vertical lead screw (4), and a lead screw seat (5). The output end of the drive motor (2) is connected to the lead screw synchronous pulley (3) for transmission. The lead screw synchronous pulley (3) is fixedly connected to the vertical lead screw (4). The vertical lead screw (4) is threaded with a liftable lead screw seat (5). The lead screw seat (5) drives the pressing die (13) to move up and down. A controller is provided on the frame (1). The controller is connected to the drive motor (2) for signal transmission. The controller controls the drive motor (2) to drive the pressing die (13) in segments during the pressing stroke. The drive motor (2) has a first driving state and a second driving state. The first driving state corresponds to the stroke of the acceleration segment, and the second driving state corresponds to the stroke of the deceleration segment. In the first driving state, the drive motor (2) drives the pressing die (13) to move downward along the acceleration segment. In the second driving state, the drive motor (2) drives the pressing die (13) to move along the deceleration segment to the mold closing end point. The stroke length of the acceleration segment is greater than the stroke length of the deceleration segment.

2. The paper container forming equipment according to claim 1, characterized in that: The acceleration time and deceleration time are set by the controller. The acceleration time is greater than the deceleration time. During the acceleration time, the drive motor (2) is in a first driving state. During the deceleration time, the drive motor (2) is in a second driving state.

3. The paper container forming equipment according to claim 1, characterized in that: The frame (1) is also equipped with a position sensor (6). The controller is connected to the position sensor (6) by signal. The position sensor (6) detects the stroke position of the pressure mold (13) in real time. The controller controls the driving state of the drive motor (2) according to the signal feedback from the position sensor (6).

4. The paper container forming equipment according to claim 3, characterized in that: Two lifting guide rods (7) are fitted on the mounting plate (101) of the frame (1). The bottom of the lifting guide rod (7) is fixedly connected to both ends of the lead screw seat (5). The lifting guide rod (7) passes through the mounting plate (101) and extends out of the top surface of the mounting plate (101). The position sensor (6) is installed on the top of the mounting plate (101). The position sensor (6) is used to detect the position of the lifting guide rod (7).

5. The paper container forming equipment according to claim 1, characterized in that: The frame (1) is provided with at least two forming stations, each forming station being equipped with an independent pressing unit and a corresponding pressing drive mechanism.

6. The paper container forming equipment according to claim 1 or 5, characterized in that: The die (13) is fixedly mounted on the upper die support plate (8), and the upper die support plate (8) is connected to the lead screw seat (5) through a connecting rod assembly (9).

7. The paper container forming equipment according to claim 6, characterized in that: The connecting rod assembly (9) includes a pressure arm connecting rod (91), a left connecting rod (92), a left upper connecting rod (93), a left lower connecting rod (94), a right connecting rod (95), a right upper connecting rod (96), and a right lower connecting rod (97); the pressure arm connecting rod (91) is fixedly mounted at the bottom of the lead screw seat (5); the left connecting rod (92) and the right connecting rod (95) are respectively hinged to both ends of the pressure arm connecting rod (91); the other end of the left connecting rod (92) is connected to the left upper connecting rod (93) and the left lower connecting rod (94). One end of the upper left linkage rod (93) is coaxially hinged, and the other end of the upper left linkage rod (94) is hinged to the mounting plate (101) of the frame (1). The other end of the lower left linkage rod (94) is hinged to the upper mold support plate (8). The other end of the right linkage rod (95) is coaxially hinged to one end of the upper right linkage rod (96) and the lower right linkage rod (97). The other end of the upper right linkage rod (96) is hinged to the mounting plate (101) of the frame (1). The other end of the lower right linkage rod (97) is hinged to the upper mold support plate (8).

8. The paper container forming equipment according to claim 6, characterized in that: A vertical guide column is fixed on the frame (1). The vertical guide column is located on both sides of the connecting rod assembly (9). The upper mold support plate (8) slides with the vertical guide column through a linear bearing.

9. The paper container forming equipment according to claim 1, characterized in that: A plurality of adjustable positioning baffles (11) are provided along the circumference of the pressure mold (14), and the positioning baffles (11) are adjustable and fixed relative to the center position of the pressure mold (14) by adjusting the component.

10. The paper container forming equipment according to claim 9, characterized in that: The adjustment assembly includes a guide groove and a bolt. The positioning baffle (11) has a guide groove. The positioning baffle (11) moves along the guide groove relative to the center position of the pressure mold (14). The bolt passes through the guide groove to fix the positioning baffle (11) on the frame (1).

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