Coil cup forming device

Abstract

The utility model discloses a rolling cup forming device which comprises a rack and a forming mechanism, the forming mechanism comprises an upper forming die, a lower forming die and a first driving part used for driving the upper forming die to move towards the side away from / close to the lower forming die, and the lower forming die is installed on the rack; the creasing mechanism comprises an upper creasing die, a lower creasing die and a second driving part used for driving the upper creasing die to move towards the side away from / close to the lower creasing die, the upper creasing die can move relative to the upper forming die, the lower creasing die is installed on the rack, a forming cavity is formed in the lower creasing die, and the second driving part is used for driving the upper creasing die to move towards the side away from / close to the lower creasing die. And the forming lower die is accommodated in the forming cavity. By additionally arranging the second driving piece, the pressing force on the crease upper die except for the gravity of the crease upper die is increased, then certain die closing force is achieved when the crease upper die and the crease lower die are closed, the paper crease forming effect is improved, and the paper crease forming device is particularly suitable for crease forming of paper with certain thickness or hardness.

Description

Technical Field

[0001] This application relates to the technical field of paper cup manufacturing, and in particular to a rolling cup forming apparatus. Background Technology

[0002] Rolled-top cups are commonly used as disposable water cups and containers for cakes, etc. Especially when used as containers, the cup body itself needs a certain strength. In order to improve the strength of the cup body, crease paper cups have appeared on the market. Their shape and structure can be referred to as a "pleated paper cup" disclosed in Chinese design patent application No. CN306791468S. The cup body and the rolled-top all adopt a folded pleated structure to improve its strength.

[0003] To achieve the aforementioned pleated structure, a corresponding forming mold is used. For example, Chinese utility model patent CN202367999U discloses "a rolled-edge cup mold," which includes an upper mold, an upper mold outer sleeve, an upper mold inner core, a lower mold, and a lower mold inner sleeve. During the paper cup manufacturing process, the cup body's pleated structure is first formed by the closure between the upper mold outer sleeve and the lower mold. Then, the upper mold inner core moves towards the lower mold inner sleeve to stretch and form the cup body. Finally, when the upper mold moves downward and closes with the lower mold inner sleeve, a rolled edge structure is formed at the outer edge of the cup body. The surfaces of the upper mold outer sleeve and the lower mold are designed as circumferentially distributed crease surfaces to form the pleated structure. The two crease surfaces are misaligned and merged to fold the paper and form the creases.

[0004] In the above-mentioned forming mold structure, the upper mold has a stepped surface, and the inner hole of the upper mold outer sleeve has a limiting groove. The upper mold lifts up synchronously with the upper mold outer sleeve through the contact between the stepped surface and the limiting groove. When the upper mold outer sleeve descends, it descends with the upper mold due to its own gravity. Furthermore, the pressing force on the paper when the upper mold outer sleeve and the lower mold are closed also comes from the gravity of the upper mold outer sleeve itself. This results in a decrease in the crease forming effect when the paper material has a certain hardness or thickness. To achieve a crease forming effect, it is necessary to improve the quality of the upper mold outer sleeve, which increases the manufacturing cost of the entire forming mold and also increases the size of the mold itself. Utility Model Content

[0005] In order to improve the crease treatment effect on paper with a certain degree of hardness or thickness, this application provides a cup forming device.

[0006] The rolling cup forming device provided in this application adopts the following technical solution:

[0007] A cup forming apparatus, comprising:

[0008] frame,

[0009] A forming mechanism, comprising an upper forming die, a lower forming die, and a first driving member for driving the upper forming die to move away from / closer to the lower forming die, the lower forming die being mounted on a frame; and

[0010] A crease mechanism, comprising an upper crease die, a lower crease die, and a second driving member for driving the upper crease die to move away from / closer to the lower crease die. The upper crease die can be displaced relative to the upper forming die. The lower crease die is mounted on a frame and has a forming cavity, which is received within the forming cavity.

[0011] By adopting the above technical solution, the upper crease die is driven by the second driving component to achieve the mold closing and mold opening actions with the lower crease die. Due to the addition of the second driving component, when the upper crease die closes with the lower crease die, in addition to relying on the gravity of the upper crease die itself, the driving force of the second driving component is also increased, which increases the pressing force on the paper. It is suitable for crease forming of paper with a certain thickness or hardness.

[0012] Preferably, the second driving member has a pressure-holding state that applies a clamping force to the upper crease mold and a pressure-releasing state that unloads the clamping force applied to the upper crease mold. When the upper crease mold and the lower crease mold are closed, the second driving member is in the pressure-holding state; when the upper crease mold and the lower crease mold are closed and the forming upper mold is displaced relative to the upper crease mold, the second driving member is in the pressure-releasing state.

[0013] By adopting the above technical solution, when the upper and lower crease dies are closed, the second driving component is in a pressure-holding state and continuously provides the pre-tightening force of the upper crease die. When the upper and lower crease dies are in the closed state and the forming upper die undergoes relative displacement, the second driving component is in a pressure-releasing state, releasing the pre-tightening force on the upper crease die, reducing the pressing force due to the closed state of the upper and lower crease dies, making it easier for the paper to be driven by the forming upper die to form the cup body, and reducing the possibility of paper breakage.

[0014] Preferably, the first driving element includes:

[0015] Drive motor;

[0016] reducer;

[0017] A rotating arm, which is connected to the output shaft of the reducer;

[0018] A drive arm, one end of which is connected to a rotating arm;

[0019] The timing frame is slidably connected to the machine frame, the other end of the drive arm is connected to the timing frame, and the upper forming mold is connected to the timing frame.

[0020] By adopting the above technical solution, the drive motor increases its torque after passing through the reducer and drives the rotating arm to rotate. One end of the drive arm rotates synchronously with the rotation of the rotating arm, and the other end of the drive arm drives the synchronous frame to slide relative to the machine frame. The crank rocker mechanism is used to drive the upper forming mold to move, thereby improving the reliability and accuracy of the movement process.

[0021] Preferred options also include:

[0022] The control module, electrically connected to the second drive unit, is used to send execution signals to the second drive unit to force it to switch between a pressure-holding state and a pressure-releasing state; and

[0023] The signal acquisition module is electrically connected to the control module. The signal acquisition module includes a photoelectric sensor mounted on the reducer and a signal plate mounted on the rotating arm. When the signal plate passes the photoelectric sensor, the photoelectric sensor can send an acquisition signal to the control module.

[0024] The rotation path of the rotating arm includes a pressure-holding section and a pressure-relieving section. When the rotating arm is in the pressure-holding section, the second driving member is in a pressure-holding state; when the rotating arm is in the pressure-relieving section, the second driving member is in a pressure-relieving state.

[0025] By adopting the above technical solution, when the rotating arm rotates, the signal plate on the rotating arm rotates to the position of the photoelectric sensor and sends an electrical signal to the control module. Since the rotation path of the rotating arm is determined, the upper and lower molds of the forming upper and lower molds have the same upper and lower strokes when they close and separate. Therefore, the pressure holding section and pressure releasing section of the rotating arm on the rotation path can be limited by calculation. In the pressure holding section, the control module maintains the pressure holding state of the second drive component, so that the upper and lower molds of the crease provide a certain mold closing force. When the rotating arm is in the pressure releasing section, the upper and lower molds of the crease complete the paper crease forming operation, and the second drive component is in the pressure releasing state. Combined with the crank-slider mechanism formed between the rotating arm and the drive arm, which has the characteristics of high transmission accuracy, the two processes of paper crease and forming are more stable.

[0026] Preferably, the second driving component is a cylinder, and the cup forming device further includes a pneumatic system connected to the second driving component. The pneumatic system includes an air source, a pressure regulating valve, a solenoid valve, and an accumulator. The air source, pressure regulating valve, and solenoid valve are connected in sequence. The outlet of the solenoid valve is connected to the rodless chamber of the second driving component. The accumulator is connected to the outlet of the solenoid valve and the pressure regulating valve. When the second driving component is in a pressure-holding state, the solenoid valve cuts off the connection between the inlet and outlet. When the second driving component is in a pressure-relieving state, the solenoid valve opens the connection between the inlet and outlet.

[0027] By adopting the above technical solution, when the second driving component is in the pressure-holding state, the solenoid valve cuts off the connection between the inlet and outlet air ports, keeping the gas in the rodless chamber to maintain pressure on the piston rod and continuously providing preload force to the upper die of the crease. When the second driving component is in the depressurization state, the solenoid valve opens the connection between the inlet and outlet air ports. At this time, the gas in the rodless chamber can be discharged through the outlet of the solenoid valve to achieve the depressurization effect. At the same time, the gas discharged from the solenoid valve enters the accumulator for energy storage. In addition to protecting the safety of pneumatic components when returning gas in the depressurization state, it can also reduce the fluctuation of the pressure value in the rodless chamber and stabilize the magnitude of the preload force in the pressure-holding state.

[0028] Preferably, the second drive component is mounted on a synchronization frame.

[0029] By adopting the above technical solution, since the second driving component is installed on the synchronous frame, the upper crease mold can be driven by the first driving component to lift one end of its stroke, which can reduce the stroke range of the second driving component and reduce the purchase cost of the component.

[0030] Preferably, the assembly also includes a seaming mechanism, which includes an upper seaming die and a lower seaming die. The upper seaming die is connected to a timing frame and can be displaced relative to the forming upper die. The lower seaming die is slidably connected to the frame.

[0031] By adopting the above technical solution, after the paper completes the crease and cup body formation, the closing of the upper and lower die of the rolling edge realizes the rolling edge process at the outer edge of the paper. The three processes of paper are realized in one forming device, which improves production efficiency.

[0032] Preferably, the crease mechanism also includes a fixing seat, which connects the upper crease mold and the second driving member.

[0033] By adopting the above technical solution, the preload of the second driving component is transmitted to the upper die of the crease through the fixed seat. First, the preload load on the upper die of the crease can be distributed, reducing the damage caused by stress concentration. Second, the fixed seat can be easily replaced and processed separately, reducing the cost of maintenance or repair.

[0034] In summary, this application includes at least one of the following beneficial technical effects:

[0035] 1. By adding a second driving component, the clamping force on the upper crease die is increased in addition to its own weight, so that the upper crease die and the lower crease die have a certain clamping force when they are closed, which improves the effect of paper crease forming, especially suitable for crease forming of paper with a certain thickness or hardness.

[0036] 2. By combining the running trajectory of the first driving component, the stroke range of the second driving component for holding and releasing pressure is limited, so that the cup body is formed without affecting the forming mechanism while completing the crease forming;

[0037] 3. The pneumatic system allows for adjustment of the holding pressure, i.e., the clamping force on the upper die of the crease, thus improving the applicability. At the same time, the addition of an accumulator reduces the fluctuation of the holding pressure during the holding state and protects other pneumatic components during the depressurization state. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of the cup forming device.

[0039] Figure 2 This is a schematic diagram showing the structure between the forming mechanism and the crease mechanism;

[0040] Figure 3 This diagram mainly illustrates the installation between the photoelectric sensor and the signal chip;

[0041] Figure 4 This is a schematic diagram showing the distribution of the pressure-holding and pressure-relieving sections of the rotating arm along the rotation path;

[0042] Figure 5 This is a schematic diagram showing the connection between the pneumatic system and the second drive component.

[0043] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Upper forming die; 21. Tie rod; 22. Limiting block; 3. Lower forming die; 4. Upper crease die; 5. Lower crease die; 6. Upper roll die; 61. Connecting sleeve; 7. Lower roll die; 8. Drive motor; 81. Reducer; 811. Photoelectric sensor; 82. Rotating arm; 821. Signal piece; 822. Pressure holding section; 823. Pressure releasing section; 83. Drive arm; 84. Synchronizing frame; 85. Guide rail; 86. Slide; 9. Second driving component; 91. Fixed seat; 92. Rodless chamber; 10. Air source; 20. Pressure regulating valve; 30. Solenoid valve; 40. Accumulator. Detailed Implementation

[0044] The present application will be further described in detail below with reference to the accompanying drawings.

[0045] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0047] Figure 1 and Figure 2 The structure of a cup forming apparatus is shown, including a frame 1, a forming mechanism, a rim-rolling mechanism, and a crease-forming mechanism. The forming mechanism is used to form the cup body of the cup, the rim-rolling mechanism is used to form the rim portion of the cup, and the crease-forming mechanism is used to form the creases on the cup body.

[0048] The molding mechanism includes an upper molding die 2, a lower molding die 3, and a first driving component connected to the upper molding die 2. The lower molding die 3 is mounted on the frame 1. The upper molding die 2 is positioned above the upper molding die 2 and is driven by the first driving component to move closer to or further away from the lower molding die 3. After the upper molding die 2 and the lower molding die 3 are closed, a cavity portion of the cup body is formed between them.

[0049] The first driving component includes a drive motor 8, a reducer 81, a rotating arm 82, a drive arm 83, and a timing frame 84. The drive motor 8 is connected to the reducer 81, which is mounted on the frame 1. In this embodiment, the reducer 81 is a worm gear reducer. The rotating arm 82 is connected to the output shaft of the reducer 81. One end of the drive arm 83 is connected to the rotating arm 82, so that the drive arm 83 can swing downwards driven by the rotating arm 82. The other end of the drive arm 83 is connected to the timing frame 84, which is connected to a slide block 86. The slide block 86 is connected to a guide rail 85 mounted on the frame 1, thereby realizing relative sliding between the timing frame 84 and the frame 1. The entire first driving component forms a crank-slider mechanism.

[0050] The curling mechanism includes an upper curling die 6 and a lower curling die 7. The lower curling die 7 is fitted onto the lower forming die 3, and the two can slide relative to each other. An elastic element is provided between the lower curling die 7 and the frame 1 to keep the lower curling die 7 in its original position when sliding relative to the lower forming die 3. The upper curling die 6 is fitted onto the upper forming die 2 and positioned above the lower curling die 7. Grooves are provided on the end faces of both the upper curling die 6 and the lower curling die 7. When the upper curling die 6 and the lower curling die 7 are closed, the grooves are used to curl the outer edge of the paper to form a curled edge structure.

[0051] Meanwhile, the upper die 6 can slide relative to the upper forming die 2. The upper die 6 is connected to the timing frame 84 via a connecting sleeve 61. A pull rod 21 is connected to the upper end of the upper forming die 2. The pull rod 21 is slidably connected inside the connecting sleeve 61, and one end of the pull rod 21 is threadedly connected to a limit block 22. The limit block 22 can abut against the timing frame 84. Thus, when the timing frame 84 moves downward, it can synchronously drive the upper forming die 2 and the upper die 6 to move. When the upper forming die 2 and the lower forming die 3 are closed, due to the sliding of the pull rod 21 relative to the connecting sleeve 61, the upper die 6 can be displaced relative to the upper forming die 2 and continue to move downward to close with the lower die 7. When the timing frame 84 is raised, the upper die 6 is driven upward through the connecting sleeve 61. The upper forming die 2 is raised by the pull rod 21 through the limit block 22 and the timing frame 84.

[0052] The crease mechanism includes an upper crease die 4, a lower crease die 5, and a second drive component 9. The lower crease die 5 is fixed on the frame 1. The upper crease die 4 surrounds the upper die 6 at the roll end. The end faces of both the upper crease die 4 and the lower crease die 5 are several trapezoidal surfaces distributed circumferentially. When the two crease dies are closed, they are pressed together by the two trapezoidal surfaces to form creases in the paper.

[0053] In this embodiment, the second driving component 9 is a cylinder, although a hydraulic cylinder can be used when a larger clamping force is required. The second driving component 9 is mounted on the synchronous frame 84 and can rise and fall with the synchronous frame 84. The piston rod of the second driving component 9 is connected to a fixed seat 91, which is connected to the upper crease die 4. The fixed seat 91 has a certain surface area to distribute the clamping force load provided by the second driving component 9, so that the clamping force on the upper crease die 4 is more uniform.

[0054] Combination Figure 3 and Figure 4The molding apparatus also includes a control module and a signal acquisition module. The control module is a PLC or a microcontroller, and is electrically connected to the signal acquisition module and the second drive component 9. The signal acquisition module includes a photoelectric sensor 811 mounted on the reducer 81 and a signal plate 821 located on one side of the rotating arm 82. The signal plate 821 is made of metal and can send an electrical signal to the control module when the rotating arm 82 rotates to the side of the photoelectric sensor 811. In this embodiment, when the rotating arm 82 rotates to the vertical position, the signal plate 821 is below the photoelectric sensor 811. In this state, the drive arm 83 is in a vertical position, and the upper forming die 2, the upper rolling die 6, and the upper folding die 4 are all at their highest points. The path of one rotation of the rotating arm 82 is a circle, which includes a pressure holding section 822 and a pressure releasing section 823. The corresponding second driving member 9 has a pressure holding state that applies pressure to the upper die 4 of the crease and a pressure releasing state that removes the pressure. When the rotating arm 82 is on the pressure holding section 822, the second driving member 9 is in the pressure holding state. When the rotating arm 82 is on the pressure releasing section 823, the second driving member 9 is in the pressure releasing state.

[0055] Furthermore, the rotating arm 82 takes the signal piece 821 being below the photoelectric sensor 811 as its starting point. When it is in the pressure holding section 822, the upper crease die 4 closes with the lower crease die 5 earlier than the upper forming die 2. The second drive member 9 is in the pressure holding state, providing the closing force for both. When the rotating arm 82 rotates from the pressure holding section 822 to the pressure release section 823, the upper forming die 2 continues to descend in the closed state of the upper crease die 4 and the lower crease die 5. At this time, the second drive member 9 is in the pressure release state. The continued descent of the synchronous frame 84 can compress the piston rod of the second drive member 9 to release the clamping force on the upper crease die 4, thereby reducing the possibility of paper tearing due to excessive closing force.

[0056] It should be noted that, under the control of the control module, the turning point between the pressure holding section 822 and the pressure releasing section 823 can be calculated by combining the rotation parameters of the selected drive motor 8 and reducer 81 with the stroke of the rotating arm 82 and drive arm 83. As long as the distance converted from the arc of the pressure holding section 822 is less than or equal to the stroke distance required when the upper forming mold 2 moves to the lower forming mold 3 for mold closing, it is acceptable.

[0057] Combination Figure 5The molding apparatus also includes a pneumatic system connected to the second driving member 9. The pneumatic system includes an air source 10, a pressure regulating valve 20, and a solenoid valve 30 connected in sequence. The outlet of the solenoid valve 30 is connected to the rodless chamber 92 of the second driving member 9. At the same time, an accumulator 40 is connected between the inlet of the solenoid valve 30 and the outlet of the pressure regulating valve 20. The solenoid valve 30 is also electrically connected to the control module. When the second driving member 9 is in a pressure-holding state, the solenoid valve 30 cuts off the connection between the inlet and outlet. When the second driving member 9 is in a pressure-relief state, the solenoid valve 30 opens the connection between the inlet and outlet.

[0058] When this forming device is working, the paper is placed on the lower crease mold 5 beforehand. The drive motor 8 drives the rotating arm 82 to rotate after the torque is increased by the reducer 81. When the signal piece 821 on the rotating arm 82 passes the photoelectric sensor 811, the control module sends an electrical signal to the solenoid valve 30 to cut off the connection between the inlet and outlet. At this time, the second drive component 9 is in the pressure holding state. When the rotating arm 82 rotates to a certain angle and enters the pressure relief section 823, the solenoid valve 30 receives the electrical signal and opens the connection between the inlet and outlet. At this time, as the synchronous frame 84 continues to descend, the piston rod of the second drive component 9 retracts and pushes out the gas in the rodless chamber 92. The gas passes through the solenoid valve 30 and is stored by the accumulator 40. After the cup body is formed, the upper die 6 and the lower die 7 close to complete the die rolling process. After the whole process is completed, the synchronous frame 84 is lifted and reset.

[0059] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A cup forming apparatus with rolled rim, characterized in that, include: Rack (1), A molding mechanism, comprising an upper molding die (2), a lower molding die (3), and a first driving member for driving the upper molding die (2) to move away from / closer to the lower molding die (3), the lower molding die (3) being mounted on a frame (1); and The crease mechanism includes an upper crease die (4), a lower crease die (5), and a second drive member (9) for driving the upper crease die (4) to move away from / closer to the lower crease die (5). The upper crease die (4) can be displaced relative to the upper forming die (2). The lower crease die (5) is mounted on the frame (1) and has a forming cavity. The lower forming die (3) is housed in the forming cavity.

2. The cup forming apparatus according to claim 1, characterized in that, The second driving member (9) has a pressure-holding state that applies pressure to the upper crease mold (4) and a pressure-releasing state that unloads the pressure applied to the upper crease mold (4). When the upper crease mold (4) and the lower crease mold (5) are closed, the second driving member (9) is in the pressure-holding state; when the upper crease mold (4) and the lower crease mold (5) are closed and the forming upper mold (2) is displaced relative to the upper crease mold (4), the second driving member (9) is in the pressure-releasing state.

3. The cup forming apparatus according to claim 2, characterized in that, The first driving element includes: Drive motor (8); Reducer (81); Rotating arm (82), which is connected to the output shaft of reducer (81); Drive arm (83), one end of which is connected to rotating arm (82); The timing frame (84) is slidably connected to the frame (1), the other end of the drive arm (83) is connected to the timing frame (84), and the upper forming mold (2) is connected to the timing frame (84).

4. The cup forming apparatus according to claim 3, characterized in that, Also includes: The control module is electrically connected to the second drive unit (9) and is used to send an execution signal to the second drive unit (9) to force the second drive unit (9) to switch between the pressure holding state and the pressure release state; as well as The signal acquisition module is electrically connected to the control module. The signal acquisition module includes a photoelectric sensor (811) installed on the reducer (81) and a signal chip (821) installed on the rotating arm (82). When the signal chip (821) passes the photoelectric sensor (811), the photoelectric sensor (811) can send an acquisition signal to the control module. The rotation path of the rotating arm (82) includes a pressure holding section (822) and a pressure relief section (823). When the rotating arm (82) is in the pressure holding section (822), the second driving member (9) is in the pressure holding state; when the rotating arm (82) is in the pressure relief section (823), the second driving member (9) is in the pressure relief state.

5. The cup forming apparatus according to claim 2, characterized in that, The second driving component (9) is a cylinder. The cup forming device also includes a pneumatic system connected to the second driving component (9). The pneumatic system includes an air source (10), a pressure regulating valve (20), a solenoid valve (30), and an accumulator (40). The air source (10), the pressure regulating valve (20), and the solenoid valve (30) are connected in sequence. The outlet of the solenoid valve (30) is connected to the rodless chamber (92) of the second driving component (9). The accumulator (40) is connected to the outlet of the solenoid valve (30) and the pressure regulating valve (20). When the second driving component (9) is in a pressure-holding state, the solenoid valve (30) cuts off the connection between the inlet and outlet. When the second driving component (9) is in a pressure-relief state, the solenoid valve (30) opens the connection between the inlet and outlet.

6. The cup forming apparatus according to claim 3, characterized in that, The second drive unit (9) is mounted on the timing frame (84).

7. The cup forming apparatus according to claim 3, characterized in that, It also includes a seaming mechanism, which includes an upper seaming die (6) and a lower seaming die (7). The upper seaming die (6) is connected to a timing frame (84). The upper seaming die (6) can be displaced relative to the forming upper die (2). The lower seaming die (7) is slidably connected to the frame (1).

8. The cup forming apparatus according to claim 1, characterized in that, The crease mechanism also has a fixed base (91), which connects the upper crease mold (4) and the second drive member (9).

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