Paper bowl waterline forming machine

Abstract

The invention relates to the technical field of paper product processing machinery, and discloses a paper bowl waterline forming machine which comprises a support, a hemming tank arranged in the middle of the support, a paper bowl arranged on the inner side of the hemming tank, a plurality of driving blocks arranged at the bottom of the support in an annular array and a line expanding mechanism arranged at the bottom of the support. The telescopic mechanism is arranged on the inner side of the wire expanding mechanism and is used for assisting wire expanding; the wire expanding mechanism comprises upper pressing blocks arranged at the bottoms of the driving blocks, two lifting rods symmetrically and movably arranged on the two upper pressing blocks in a penetrating mode and rotary knobs arranged on the lifting rods, and the bottom ends of the rotary knobs are in threaded connection with the corresponding driving blocks. By means of the telescopic mechanism, when the pressing block expands and presses the paper bowl, supplementary extrusion is conducted on the edge gap part synchronously, the structure ensures that a waterline is completely formed on the surface of the paper bowl and is not broken or lost, the telescopic mechanism enables the pressing block to have a larger expansion range, and the waterline pressing requirements of the paper bowls with different diameters can be met.

Description

Technical Field

[0001] This invention relates to the field of paper product processing machinery technology, and in particular to a paper bowl water-line forming machine. Background Technology

[0002] The paper bowl water level line forming machine is a core piece of equipment in paper bowl production. It is mainly used to accurately press water level line marks on the bowl wall. Its function is to quickly and evenly press clear water level markings on the inside of the paper bowl through the mold, ensuring that the marking position of each paper bowl is consistent and avoiding printing deviations. At the same time, this process not only improves the practicality of the product, but also makes it convenient for users to intuitively judge the amount of water injected.

[0003] Water-line forming machines are widely used in paper bowl manufacturing, but due to limitations in their structure and working principle, they often suffer from some significant problems. Traditional paper bowl forming machines typically use rotary rolling to form the bowl body. This involves mechanically rolling the paper against the mold shape during high-speed rotation to form the bowl structure. However, this method has a significant drawback when pressing the water line: due to uneven stress during rolling, the paper is prone to stretching or compression deformation at the water line during edge forming, leading to blurred, misaligned, or even broken water lines, affecting the strength of the paper bowl. This deformation not only reduces the product's appearance quality but may also impact the user experience. Therefore, traditional rolling paper bowl machines exhibit poor stability in the water-line forming process. Summary of the Invention

[0004] In view of the problem that the existing forming machine easily deforms the paper bowl during the edge rolling process after rolling the water line, a paper bowl water line forming machine is proposed.

[0005] Its purpose is to imprint water lines during the edge rolling of the forming machine, and to form different water lines at the same time.

[0006] The technical solution of the present invention is a paper bowl water-line forming machine, including a support, a rolled edge tank disposed in the middle of the support, a paper bowl disposed inside the rolled edge tank, a plurality of driving blocks disposed in a circular array at the bottom of the support, and a wire raising mechanism disposed at the bottom of the support, and a telescopic mechanism disposed inside the wire raising mechanism for assisting wire raising. The wire raising mechanism includes an upper pressure block located at the bottom of the drive block, two lifting rods symmetrically and movably mounted on the two upper pressure blocks, a knob mounted on the lifting rod with its bottom end threadedly connected to the corresponding drive block, the bottom of the lifting rod extending into the corresponding moving groove and slidably connected to it, a slider slidably mounted at the bottom of the upper pressure block, a limiting block mounted on the side of the slider away from the nearest lifting rod, a lower pressure block mounted at the bottom of the limiting block, a moving groove on the side of the lower pressure block near the limiting block, and mounting grooves symmetrically mounted on the top of the lower pressure block. A telescopic rod is rotatably mounted inside the mounting groove, with both ends of the telescopic rod connected to two adjacent lower pressure blocks, and an expansion unit mounted between two adjacent upper pressure blocks.

[0007] Furthermore, the telescopic rod is rotatably connected to both ends of a support shaft, the bottom of which is fixedly connected to a corresponding lower pressure block. The telescopic rod consists of a sleeve and a telescopic shaft, with the outer wall of the telescopic shaft slidably connected to the inner wall of the sleeve.

[0008] Furthermore, a crossbar is provided at the top of the lifting rod, and a limit hole is opened at the end of the crossbar near the knob. The knob is rotatably connected to the inner wall of the limit hole.

[0009] Furthermore, the expansion unit includes a lead screw disposed on the side of the upper pressure block near the slider, a splined shaft disposed on the end of the lead screw away from the upper pressure block, a bushing disposed on the outside of the splined shaft, a gear set disposed on several bushings close to one end of each other, and a housing disposed on the outside of the gear set.

[0010] Furthermore, the gear set consists of several small bevel gears and one large bevel gear. The small bevel gears are fixedly connected to the bushing, and the large bevel gear is rotatably connected to the inner wall of the outer casing. The spline shaft is hexagonal prism in shape, and the bushing has a hexagonal groove at the end away from the outer casing. The hexagonal groove is slidably connected to the spline shaft.

[0011] Furthermore, any two adjacent upper and lower pressure blocks are connected by a telescopic mechanism. The telescopic mechanism includes two “6”-shaped receiving cavities opened inside the two adjacent upper pressure blocks, and the two receiving cavities on the two adjacent upper pressure blocks are symmetrical. A short shaft is provided inside the receiving cavity, and a rotating sleeve is rotatably sleeved on the short shaft. The telescopic mechanism also includes a coil spring, and the two ends of the coil spring are respectively connected to the two rotating sleeves.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting up a line expansion mechanism, watermark forming is achieved through the expansion of the pressure block during the edge curling process. This mechanism allows the edge curling and water line pressing to be completed simultaneously, eliminating the paper stretching and deformation problems caused by the step-by-step processing in traditional processes. The pressure block expands precisely within the mold to ensure the water line position is fixed, preventing paper displacement or breakage. This integrated forming method maintains the structural stability of the paper cup, ensures clear water lines, and improves production efficiency. The application of the line expansion mechanism solves the defect of easy deformation at the water line position in traditional rolling processes, ensuring that the quality of the finished product meets the standards.

[0013] 2. By setting up a telescopic mechanism, when the pressure block expands and presses the paper bowl, it simultaneously supplements the compression of the edge gaps. This structure ensures that the water line is completely formed on the surface of the paper bowl without breakage or gaps. The telescopic mechanism allows the pressure block to have a larger expansion range, which can adapt to the water line pressing needs of paper bowls with different diameters. By compensating for the pressing force, it solves the problem of pressure loss caused by gaps at the edges during the expansion of the equipment, ensuring that the water line of paper bowls of various specifications is clear and continuous. This design improves the versatility of the equipment and achieves a stable and efficient water line forming effect.

[0014] 3. By setting up an expansion unit, two sets of pressure blocks are configured at the top and bottom. The expansion range of the lower pressure block is changed by mechanical adjustment, so that the edges of the upper and lower pressure blocks form a position difference. When the upper pressure block is fixed to form the upper water line, the lower pressure block can adjust the expansion amount according to the inclination of the bowl wall to ensure that the lower water line is completely formed. This mechanical adjustment method allows the two sets of pressure blocks to adapt to the inclination changes of different sections of the bowl wall. While maintaining synchronous pressing, it ensures the continuity of the two water lines on the bowl wall with varying angles. The position difference of the edges of the upper and lower pressure blocks directly corresponds to the difference in the inclination of the bowl wall, realizing the water line formation of paper bowls with different inclination angles. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the entire invention; Figure 2 This is a schematic diagram of the paper bowl and rolled-edge can of the present invention; Figure 3 This is a schematic diagram showing the relative positions of the bracket and the drive block in this invention; Figure 4 This is an exploded view of the wire raising mechanism of the present invention; Figure 5 This is a schematic diagram of the overall exploded structure of the propulsion component of the present invention; Figure 6 This is a schematic diagram showing the connection between the drive block and the upper pressure block of the present invention; Figure 7 This is a schematic diagram showing the connection between the telescopic rod and the drive block of the present invention; Figure 8 This is a schematic diagram showing the connection between the upper pressure block and the telescopic rod of the present invention; Figure 9This is a schematic diagram showing the connection between the lower pressure block and the telescopic rod of the present invention; Figure 10 This is a schematic diagram showing the connection between the slider and the limiting block of the present invention; Figure 11 This is a schematic diagram showing the connection between the housing and the gear set of the present invention; Figure 12 This is a schematic diagram of the telescopic rod structure of the present invention; Figure 13 This is a schematic diagram of the upper and lower pressure blocks of the present invention; Figure 14 This is a schematic diagram of the coiled spring structure of the present invention.

[0016] In the picture: 1. Bracket; 2. Rolled edge can; 3. Paper bowl; 4. Drive block; 5. Wire lifting mechanism; 6. Telescopic mechanism; 51. Upper pressure block; 52. Lifting rod; 53. Knob; 54. Slider; 55. Limit block; 56. Lower pressure block; 57. Moving slot; 58. Mounting slot; 59. Telescopic rod; 510. Lead screw; 511. Splined shaft; 512. Bushing; 513. Gear set; 514. Housing; 61. Receiving cavity; 62. Short shaft; 63. Rotating sleeve; 64. Coil spring. Detailed Implementation

[0017] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0018] Example 1, referring to Figures 1-12The first embodiment of the present invention provides a paper bowl water-line forming machine, including a support 1, a rolled edge tank 2 fixedly connected to the middle of the support 1, a paper bowl 3 placed inside the rolled edge tank 2, a plurality of drive blocks 4 slidably connected to the bottom of the support 1 in a circular array, and a wire-stretching mechanism 5 installed at the bottom of the support 1, and a telescopic mechanism 6 installed inside the wire-stretching mechanism 5 for assisting wire stretching; the wire-stretching mechanism 5 includes an upper pressure block 51 fixedly connected to the bottom of the drive block 4, two lifting rods 52 symmetrically and movably connected to the two upper pressure blocks 51, and a knob 53 rotatably connected to the lifting rods 52, the bottom end of the knob 53 being connected to the corresponding drive block 4. The upper pressure block 51 has a threaded connection and a sliding block 54 at the bottom of the upper pressure block 51. A limiting block 55 is slidably connected to the side of the slider 54 away from the nearest lifting rod 52. A lower pressure block 56 is fixedly connected to the bottom of the limiting block 55. A moving groove 57 is opened on the side of the lower pressure block 56 near the limiting block 55. The bottom of the lifting rod 52 extends into the corresponding moving groove 57 and the two are slidably connected. A mounting groove 58 is symmetrically opened on the top of the lower pressure block 56. A telescopic rod 59 is rotatably installed inside the mounting groove 58. The two ends of the telescopic rod 59 are respectively connected to two adjacent lower pressure blocks 56 and an expansion unit that is assembled between two adjacent upper pressure blocks 51.

[0019] Specifically, the pressure sensor on the bracket 1 moves the drive block 4 away from each other by squeezing it. The upper pressure block 51 moves together with the drive block 4. The upper pressure block 51 expands and squeezes the paper bowl 3 to press out the water line. The knob 53 can be rotated to move it up and down. When the knob 53 moves, it drives the lifting rod 52 to move at the same time. When the lifting rod 52 moves up and down, it drives the lower pressure block 56 connected to it to move. Since the lower pressure block 56 is connected by the telescopic rod 59, all the lower pressure blocks 56 will move at the same time. The moving groove 57 is slidably connected to the bottom of the lifting rod 52. When the lower pressure block 56 moves horizontally, the maximum range of movement cannot exceed the length of the moving groove 57. The mounting groove 58 accommodates the telescopic rod 59 to move inside. The telescopic rod 59 can adapt to the positional movement between different lower pressure blocks 56 and keep different lower pressure blocks 56 at the same horizontal height.

[0020] Reference Figure 9 and Figure 12 The telescopic rod 59 is rotatably connected to two ends of a support shaft, and the bottom of the support shaft is fixedly connected to the corresponding lower pressure block 56. The telescopic rod 59 is composed of a sleeve and a telescopic shaft, and the outer wall of the telescopic shaft is slidably connected to the inner wall of the sleeve.

[0021] Specifically, the two ends of the telescopic rod 59 are limited by corresponding support shafts, so that the two ends can only rotate around the corresponding support shafts. Furthermore, the telescopic rod 59 can change its length by extending and retracting inside the sleeve through the telescopic shaft, thus adapting to the positional changes caused by the expansion and contraction of different lower pressure blocks 56.

[0022] Reference Figure 7 The top of the lifting rod 52 is provided with a crossbar, and a limit hole is opened at one end of the crossbar near the knob 53. The knob 53 is rotatably connected to the inner wall of the limit hole.

[0023] Specifically, when the knob 53 moves, it transmits force to the crossbar, which in turn drives the lifting rod 52 to move synchronously. The knob 53 can only make the lifting rod 52 move up and down.

[0024] Reference Figure 8 and Figure 11 The expansion unit includes a lead screw 510 rotatably connected to the upper pressure block 51 near the slider 54, a spline shaft 511 fixedly connected to the end of the lead screw 510 away from the upper pressure block 51, a bushing 512 sleeved on the outside of the spline shaft 511, a gear set 513 fixedly connected to several bushings 512 close to each other, and a housing 514 rotatably connected to the outside of the gear set 513.

[0025] Specifically, the rotation of the lead screw 510 will drive the slider 54 to move, and the movement of the slider 54 will drive the limit block 55 to move. The limit block 55 will drive the pressure block 56 to move. The rotation of the gear set 513 will cause the bushing 512 to rotate at the same time. The bushing 512 will cause the lead screw 510 to rotate through the spline shaft 511. The gear set 513 will be constrained by the outer shell 514 to maintain a specific relative position.

[0026] Reference Figure 10 and Figure 11 The gear set 513 consists of several small bevel gears and one large bevel gear. The small bevel gears are fixedly connected to the bushing 512, and the large bevel gear is rotatably connected to the inner wall of the outer shell 514. The spline shaft 511 is hexagonal prism in shape. The bushing 512 has a hexagonal groove at the end away from the outer shell 514, and the hexagonal groove is slidably connected to the spline shaft 511.

[0027] Specifically, the large bevel gear can drive several small bevel gears to rotate simultaneously, and the small bevel gears drive the corresponding bushings 512 to rotate.

[0028] Example 2, refer to Figures 1-14 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that any two adjacent upper pressure blocks 51 and lower pressure blocks 56 are connected by a telescopic mechanism 6. The telescopic mechanism 6 includes two “6”-shaped receiving cavities 61 opened inside the two adjacent upper pressure blocks 51. The two receiving cavities 61 on the two adjacent upper pressure blocks 51 are symmetrical in structure. A short shaft 62 is provided inside the receiving cavity 61. A rotating sleeve 63 is rotatably sleeved on the short shaft 62. The telescopic mechanism 6 also includes a coil spring 64. The two ends of the coil spring 64 are respectively connected to the two rotating sleeves 63.

[0029] Specifically, the interior of the receiving cavity 61 can accommodate the coiled spring 64, providing sufficient space for deformation. The short shaft 62 limits the position of the rotating sleeve 63, allowing it to rotate only in place. The rotating sleeve 63 constrains the end of the coiled spring 64, which coils around the rotating sleeve 63 when storing power. The coiled spring 64 utilizes its elastic deformation to adapt to the positional changes of different upper pressure blocks 51. When two adjacent upper pressure blocks 51 and lower pressure blocks 56 merge, the two receiving cavities 61 on their adjacent sides are connected, and the corresponding coiled spring 64 adapts to the positional changes between the two upper pressure blocks 51 through the coiling at both ends. The same applies to the coiled spring 64 corresponding to the lower pressure block 56, which fills the gap between the edges of the upper pressure blocks 51. The coiled spring 64 can also work with the upper pressure blocks 51 to squeeze the paper bowl 3, maintaining the continuity of the waterline forming. Different lower pressure blocks 56 also cooperate with the corresponding coiled spring 64 to achieve the continuity of the waterline forming of the lower pressure blocks 56. The remaining structure is the same as that of Embodiment 1.

[0030] Based on embodiments 1-2, the working principle of this invention is as follows: During the pressing of the water line, the pressure rod of the bracket 1 moves down to squeeze the driving block 4, causing the driving block 4 to expand outward. Simultaneously, the upper pressure block 51 expands along with it. The upper pressure block 51 moves the slider 54 via the lead screw 510, and the slider 54 expands the lower pressure block 56 via the limiting block 55, thus forming a double water line. As the upper pressure block 51 expands, the gap between the edges of different pressure blocks increases. At this time, the upper pressure block 51 drives the coiled spring 64 to move via the short shaft 62 and the bushing 512. Due to the increased distance between adjacent upper pressure blocks 51, the coiled spring 64 extends and engages with the edge of the upper pressure block 51, squeezing the paper bowl 3 to form the water line. When the upper pressure blocks 51 converge, the coiled spring 64 contracts until it retracts into the receiving cavity 61 connected at both ends. The coiled spring 64 connected to the lower pressure block 56 operates in the same manner as described above. When it is necessary to adjust the distance between the two water lines, the knob 53 is turned. The knob 53 drives the connected lifting rod 52 to move upward. The lifting rod 52 drives the connected lower pressure block 56 to move upward. The moving lower pressure block 56 transmits force through the telescopic shaft, so that all the lower pressure blocks 56 move upward at the same time. Reversing the knob 53 will make all the lower pressure blocks 56 move downward, thereby adjusting the distance between the upper pressure plate and the lower pressure block 56. When water line forming of bowl walls with different slopes, the gear set 513 is turned to drive all the bushings 512 to rotate. The bushings 512 drive the lead screw 510 to rotate through the spline shaft 511. The lead screw 510 drives the limit block 55 to move through the slider 54. The limit block 55 drives the lower pressure block 56 to move, so that the edge of the lower pressure block 56 and the edge of the upper pressure plate are not on the same vertical line. By controlling the expansion and contraction of the lower pressure block 56, water line forming of paper bowl walls with different slopes can be achieved at the same time.

[0031] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A paper bowl forming machine, comprising a support (1), a rolled edge tank (2) disposed in the middle of the support (1), a paper bowl (3) disposed inside the rolled edge tank (2), and a plurality of drive blocks (4) arranged in a circular array at the bottom of the support (1), characterized in that: It also includes a wire raising mechanism (5) located at the bottom of the support (1), and a telescopic mechanism (6) located inside the wire raising mechanism (5) for assisting wire raising. The wire raising mechanism (5) includes an upper pressure block (51) disposed at the bottom of the drive block (4), two lifting rods (52) symmetrically and movably disposed on the two upper pressure blocks (51), a knob (53) disposed on the lifting rod (52), the bottom end of the knob (53) being threadedly connected to the corresponding drive block (4), a slider (54) slidably disposed at the bottom of the upper pressure block (51), a limiting block (55) disposed on the side of the slider (54) away from the nearest lifting rod (52), and a limiting block (55) disposed at the bottom of the limiting block (55). The lower pressure block (56) has a moving groove (57) on the side of the lower pressure block (56) near the limiting block (55). The bottom of the lifting rod (52) extends into the corresponding moving groove (57) and the two are slidably connected. The mounting groove (58) is symmetrically opened on the top of the lower pressure block (56). The mounting groove (58) is rotatably provided with a telescopic rod (59). The two ends of the telescopic rod (59) are respectively connected to two adjacent lower pressure blocks (56) and an expansion unit is provided between two adjacent upper pressure blocks (51).

2. The paper bowl water-line forming machine according to claim 1, characterized in that: The telescopic rod (59) is rotatably connected to two ends of a support shaft. The bottom of the support shaft is fixedly connected to the corresponding lower pressure block (56). The telescopic rod (59) consists of a sleeve and a telescopic shaft. The outer wall of the telescopic shaft is slidably connected to the inner wall of the sleeve.

3. The paper bowl water-line forming machine according to claim 1, characterized in that: The top of the lifting rod (52) is provided with a crossbar, and a limit hole is opened at one end of the crossbar near the knob (53). The knob (53) is rotatably connected to the inner wall of the limit hole.

4. The paper bowl water-line forming machine according to claim 1, characterized in that: The expansion unit includes a lead screw (510) disposed on the side of the upper pressure block (51) near the slider (54), a spline shaft (511) disposed on the end of the lead screw (510) away from the upper pressure block (51), a bushing (512) disposed on the outside of the spline shaft (511), a gear set (513) disposed on several bushings (512) close to each other, and a housing (514) disposed on the outside of the gear set (513).

5. The paper bowl water-line forming machine according to claim 4, characterized in that: The gear set (513) consists of several small bevel gears and one large bevel gear. The small bevel gears are fixedly connected to the bushing (512), and the large bevel gear is rotatably connected to the inner wall of the outer shell (514). The spline shaft (511) is hexagonal prism in shape. The bushing (512) has a hexagonal groove at the end away from the outer shell (514), and the hexagonal groove is slidably connected to the spline shaft (511).

6. The paper bowl water-line forming machine according to claim 1, characterized in that: Any two adjacent upper pressure blocks (51) and lower pressure blocks (56) are connected by a telescopic mechanism (6). The telescopic mechanism (6) includes two “6”-shaped receiving cavities (61) opened inside the two adjacent upper pressure blocks (51), and the two receiving cavities (61) on the two adjacent upper pressure blocks (51) are symmetrical in structure. A short shaft (62) is provided inside the receiving cavity (61), and a rotating sleeve (63) is rotatably sleeved on the short shaft (62). The telescopic mechanism (6) also includes a coil spring (64), and the two ends of the coil spring (64) are respectively connected to the two rotating sleeves (63).

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