Notch pressing tool for paper straw

Abstract

The utility model provides a notch pressing tool for a paper straw, which comprises a base plate, and a main shaft and an auxiliary shaft are respectively and rotatably connected in the base plate; a feeding shaft and a pressing shaft are fixedly installed at the front end of the main shaft and the front end of the auxiliary shaft respectively. The feeding shaft and the pressing shaft are attached to each other. A plurality of containing grooves used for containing the paper straws are formed in the outer side wall of the feeding shaft in a circumferential array mode. A pressing assembly capable of pressing the cross section of the spine part of the paper straw into a gourd shape is arranged between the interior of the containing groove and the material pressing shaft. The main shaft and the auxiliary shaft rotate at the same time through a driving device installed on the back of the base plate, and continuous pressing of the paper straw is achieved. The first pressing part and the second pressing part are used for carrying out secondary processing on the paper straw, the obtuse-angle pressing part is used for carrying out two-way progressive extrusion on the straw wall, a gourd-shaped section with the inwards-concave middle and the outwards-convex two sides is formed, and the bending strength of the spine part is effectively improved compared with that of a traditional design.

Description

Technical Field

[0001] This utility model relates to the field of straw processing equipment, and in particular to a cutting and pressing tool for paper straws. Background Technology

[0002] Paper straws have significant technical problems in practical applications: their pointed ends, which are used to pierce the sealing film of beverage packaging, are prone to bending, cracking, or even failure of the entire straw due to their weak structure when used repeatedly or subjected to force. This problem directly affects the user experience and limits the promotion of paper straws in high-frequency use scenarios, such as food delivery and pre-packaged beverages.

[0003] While existing technologies can improve local strength by increasing the number of paper layers or the grammage, this leads to decreased straw flexibility, increased costs, and is inconsistent with environmental protection principles. Utility Model Content

[0004] To address the issue of structural weakness in existing paper straws used for piercing beverage packaging sealing films, this invention provides a cutting and pressing tool for paper straws.

[0005] The present invention provides a cutting and pressing fixture for paper straws, which adopts the following technical solution:

[0006] A cutting and pressing fixture for paper straws includes a base plate, with a main shaft and a secondary shaft rotatably connected inside the base plate; a feed shaft and a pressing shaft are fixedly mounted at the front ends of the main shaft and the secondary shaft, respectively; the feed shaft and the pressing shaft are in contact with each other; the outer side wall of the feed shaft has several grooves arranged in a circumferential array to prevent the paper straws from being placed; a pressing assembly is provided between the placement groove and the pressing shaft to press the cross-section of the paper straw's pointed end into a "gourd" shape; the main shaft and the secondary shaft rotate simultaneously via a drive device mounted on the back of the base plate to achieve continuous pressing of the paper straws;

[0007] Furthermore, the drive device includes a feeding gear, a pressing gear, and a servo motor; a feeding gear is installed at the end of the main shaft away from the feeding shaft; a pressing gear is installed at the end of the secondary shaft away from the pressing shaft; the feeding gear and the pressing gear mesh with each other; a servo motor is installed on the back of the substrate by bolts; a transmission device capable of driving the secondary shaft to rotate is provided between the output end of the servo motor and the secondary shaft;

[0008] Furthermore, the transmission device can be a combination of a transmission wheel and a transmission belt, or a combination of a chain and a sprocket;

[0009] Furthermore, the pressing assembly includes a first pressing part and a second pressing part; the first pressing part is welded into each of the placement slots and is disposed at one end of the spike of the paper straw in the placement slot; the second pressing parts are distributed in a circumferential array on the outer wall of the pressing shaft; when the pressing shaft and the feeding shaft rotate simultaneously, the second pressing part continuously engages with the placement slot and cooperates with the first pressing part to press and deform the paper straw;

[0010] Furthermore, the first pressing part is welded tightly to the inner wall of the placement groove and extends outward to form a pressing angle with an obtuse angle; the cross-section of the second pressing part is a right trapezoidal structure, with one obtuse angle set as the pressing angle, and the two pressing angles relative to each other compress the paper straw to achieve deformation when the first pressing part and the second pressing part mesh.

[0011] Furthermore, a straightening wheel is rotatably connected to the outer wall of the substrate; the straightening wheel is in close contact with the feeding shaft; the straightening wheel is located on the upper side of the feeding shaft, and when the paper straw is placed in the placement groove, the straightening wheel first presses the paper straw firmly into the placement groove.

[0012] Furthermore, the outer wall of the substrate is rotatably connected to an auxiliary wheel; there are two auxiliary wheels; the auxiliary wheels are tightly fitted with the feeding shaft; the two auxiliary wheels are respectively arranged on the upper and lower sides of the pressing shaft. When the paper straw passes the straightening wheel, it is first further compacted by one auxiliary wheel, then deformed by the pressing shaft, and then falls off by its own gravity after passing through the other auxiliary wheel.

[0013] In summary, the beneficial effects of this utility model are as follows:

[0014] This invention utilizes a first pressing section and a second pressing section to perform secondary processing on paper straws. The obtuse-angle pressing section applies bidirectional progressive extrusion to the straw wall, forming a "gourd-shaped" cross-section with a concave center and convex sides. This effectively improves the bending strength of the spikes compared to traditional designs and greatly extends the bending life. Furthermore, this invention is based on synchronous gear drive and continuous meshing pressing, resulting in a short processing cycle, effectively ensuring production capacity, and making it suitable for high-speed automated production lines.

[0015] Importantly, the straw processing method of this invention is entirely physical, requiring no chemical additives, and the paper fibers remain intact, meeting the requirements for food contact materials. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the back of the overall structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the overall structure of the pressing component of this utility model;

[0019] Figure 4 This utility model Figure 2 An enlarged schematic diagram of part A in the middle;

[0020] Figure 5 This is a schematic diagram of the straw deformation process pressed by this utility model.

[0021] As shown in the figure: 1-substrate, 2-main shaft, 3-feed shaft, 4-feed gear, 5-placement groove, 51-first pressing part, 6-pressing shaft, 61-second pressing part, 7-sub-shaft, 8-pressing gear, 9-servo motor, 91-transmission device, 10-straightening wheel, 101-auxiliary wheel, 12-paper straw, 121-spiky part, 122-deformation part. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 1-5 The present invention will be further described in detail below:

[0023] This utility model discloses a cutting and pressing fixture for paper straws, such as... Figure 1 , 2 As shown in Figure 5, a cutting and pressing fixture for paper straws includes a base plate 1. A main shaft 2 and a secondary shaft 7 are rotatably connected inside the base plate 1. A feed shaft 3 and a pressing shaft 6 are fixedly mounted at the front ends of the main shaft 2 and the secondary shaft 7, respectively. The feed shaft 3 and the pressing shaft 6 are in contact with each other. The outer wall of the feed shaft 3 is circumferentially arrayed with several placement grooves 5 for preventing the paper straws 12 from falling. A pressing assembly is provided between the placement grooves 5 and the pressing shaft 6 to press the cross-section of the sharp part 121 of the paper straw 12 into a "gourd" shape. The main shaft 2 and the secondary shaft 7 are connected by a mounting plate... The drive device mounted on the back of the substrate 1 rotates simultaneously to achieve continuous pressing of the paper straw 12. In this embodiment, the substrate 1 is a tooling main support structure, and the main shaft 2 and the secondary shaft 7 are rotatably connected inside by bearings or bushings. The feed shaft 3 is installed at the front end of the main shaft 2, and the pressure shaft 6 is installed on the secondary shaft 7. The two fit together to form a clamping and conveying channel for the straw 12. The main shaft 2 and the secondary shaft 7 rotate synchronously in opposite directions under the drive of the drive device. The feed shaft 3 carries the straw 12 through the placement groove 5, and the pressure shaft 6 completes the deformation processing by cooperating with the feed shaft 3 through the pressing component.

[0024] like Figure 2As shown, the drive device includes a feeding gear 4, a pressing gear 8, and a servo motor 9; the feeding gear 4 is installed at the end of the main shaft 2 away from the feeding shaft 3; the pressing gear 8 is installed at the end of the secondary shaft 7 away from the pressing shaft 6; the feeding gear 4 and the pressing gear 8 mesh with each other; the servo motor 9 is installed on the back of the base plate 1 by bolts; a transmission device 91 that can drive the secondary shaft 7 to rotate is provided between the output end of the servo motor 9 and the secondary shaft 7; in this embodiment, the servo motor 9 is the power source, which drives the secondary shaft 7 through the transmission device 91. The pressing gear 8 on the secondary shaft 7 meshes with the feeding gear 4 of the main shaft 2 to achieve synchronous reverse rotation of the two shafts; when the motor starts; the transmission device 91 drives the secondary shaft 7 to rotate; then the pressing gear 8 meshes with the feeding gear 4; the main shaft 2 rotates in the opposite direction, and the two shafts rotate at the same speed but in opposite directions; the gear meshing ensures that the speed is strictly synchronized, avoiding jamming of the suction tube 12;

[0025] The transmission device 91 can be one of the following: a combination of a transmission wheel and a transmission belt, or a combination of a chain and a sprocket.

[0026] like Figure 3 , 4 As shown, the pressing assembly includes a first pressing part 51 and a second pressing part 61. The first pressing part 51 is welded into each placement groove 5 and is disposed at one end of the spike 121 of the paper straw 12 in the placement groove 5. The second pressing parts 61 are distributed in a circumferential array on the outer wall of the pressing shaft 6. When the pressing shaft 6 and the feeding shaft 3 rotate simultaneously, the second pressing parts 61 continuously mesh with the placement groove 5 and cooperate with the first pressing part 51 to press and deform the paper straw 12. The first pressing part 51 is welded tightly to the inner wall of the placement groove 5 and extends outward to form a pressing angle with an obtuse angle. The cross-section of the second pressing part 61 is a right trapezoidal structure, with one of the obtuse angles set as... The pressing angles, when the first pressing part 51 and the second pressing part 61 engage, relatively squeeze the deformation point 122 of the paper straw 12 to achieve deformation. In this embodiment, the first pressing part 51 is fixed in the placement groove 5 of the feeding shaft 3 and has an obtuse pressing angle, which presses against the spike end of the straw 12 from the inside. The second pressing part 61 is distributed on the surface of the pressing shaft 6 and has a right trapezoidal cross section. The obtuse pressing angle is opposite to the first pressing part 51. When the straw 12 enters the placement groove 5, the two shafts rotate to make the two pressing parts engage. The obtuse angle squeezes the wall of the straw 12 to form a "gourd" shaped cross section. The final "gourd" structure formed by the straw 12 can increase the moment of inertia of the cross section and enhance the bending resistance.

[0027] It is worth noting that the obtuse angle provides progressive compression, avoiding stress concentration that could cause paper tearing; the right-angled trapezoidal second pressing part 61 guides the deformation of the straw 12 through the inclined surface; when the pressing parts engage, the obtuse angle surface applies pressure gradually, and the wall of the straw 12 is compressed in both directions and concave inward, forming a symmetrical gourd-shaped profile.

[0028] like Figure 1As shown, a straightening wheel 10 is rotatably connected to the outer wall of the substrate 1; the straightening wheel 10 is tightly fitted with the feeding shaft 3; the straightening wheel 10 is located on the upper side of the feeding shaft 3. When the paper straw 12 is placed in the placement groove 5, it is first pressed firmly into the placement groove 5 by the straightening wheel 10; two auxiliary wheels 101 are rotatably connected to the outer wall of the substrate 1; the auxiliary wheels 101 are tightly fitted with the feeding shaft 3; the two auxiliary wheels 101 are respectively located on the upper and lower sides of the pressing shaft 6. When the paper straw 12 passes the straightening wheel 10, it is first further pressed by one of the auxiliary wheels 101, and then passes through the pressing shaft. 6. After being pressed and deformed, the straw 12 falls off under its own weight after passing through another auxiliary wheel 101. In this embodiment, the straightening wheel 10 is located above the feeding shaft 3 and presses the straw 12 into the placement groove 5 to ensure initial positioning. The auxiliary wheels 101 are distributed on both sides of the pressing shaft 6 to further compact the straw 12 and prevent it from shifting during the pressing process. When the straw 12 is placed in the placement groove 5, the straightening wheel 10 presses it down to fix it, and then it is pre-tightened by the first auxiliary wheel 101. Finally, it is pressed and deformed by the pressing shaft 6 and then compacted again by the second auxiliary wheel 101 before falling off. The gravity falling design simplifies the collection process and improves the degree of automation.

[0029] The implementation principle of this utility model embodiment is as follows:

[0030] SP1. Feeding: Paper straws 12 are placed into the feeding shaft 3 and the placement slot 5, and the straightening rollers 10 are used to press and position them.

[0031] SP2. Conveying: The dual-axis rotate synchronously, and the suction tube 12 enters the pressing area.

[0032] SP3. Pressing: The first pressing part 51 and the second pressing part 61 press the deformation part 122 of the paper straw 12, and engage to form a gourd cross section. The auxiliary wheel 101 prevents deviation.

[0033] SP4. Discharge: The straw 12 automatically detaches after being compacted twice.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. The various components mentioned in this utility model are common technologies in the existing field. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A cutting and pressing fixture for paper straws, comprising a substrate (1), characterized in that: The substrate (1) is rotatably connected to a main shaft (2) and a secondary shaft (7); the front ends of the main shaft (2) and the secondary shaft (7) are respectively fixedly installed with a feeding shaft (3) and a pressing shaft (6); the feeding shaft (3) and the pressing shaft (6) are in close contact with each other; the outer side wall of the feeding shaft (3) is provided with a number of placement grooves (5) for preventing paper straws from being placed in a circular array; a pressing component is provided between the placement groove (5) and the pressing shaft (6) to press the cross section of the paper straw spike into a "gourd" shape; the main shaft (2) and the secondary shaft (7) rotate simultaneously through a drive device installed on the back of the substrate (1) to realize continuous pressing of the paper straw.

2. A cutting and pressing fixture for paper straws according to claim 1, characterized in that... The drive device includes a feed gear (4), a pressure gear (8), and a servo motor (9); the feed gear (4) is installed at the end of the main shaft (2) away from the feed shaft (3); the pressure gear (8) is installed at the end of the secondary shaft (7) away from the pressure shaft (6); the feed gear (4) and the pressure gear (8) mesh with each other; the servo motor (9) is installed on the back of the base plate (1) by bolts; a transmission device (91) that can drive the secondary shaft (7) to rotate is provided between the output end of the servo motor (9) and the secondary shaft (7).

3. A cutting and pressing fixture for paper straws according to claim 2, characterized in that... The transmission device (91) is one of the following: a combination of a transmission wheel and a transmission belt, or a combination of a chain and a sprocket.

4. A cutting and pressing fixture for paper straws according to claim 1, characterized in that... The pressing assembly includes a first pressing part (51) and a second pressing part (61); the first pressing part (51) is welded into each of the placement slots (5) and is disposed at one end of the spike of the paper straw in the placement slot (5); the second pressing part (61) is distributed in a circumferential array on the outer wall of the pressing shaft (6); when the pressing shaft (6) and the feeding shaft (3) rotate simultaneously, the second pressing part (61) continuously meshes with the placement slot (5) and cooperates with the first pressing part (51) to press and deform the paper straw.

5. A cutting and pressing fixture for paper straws according to claim 4, characterized in that... The first pressing part (51) is welded tightly to the inner wall of the placement groove (5) and extends outward to form a pressing angle with an obtuse angle; the cross section of the second pressing part (61) is a right trapezoidal structure, with one obtuse angle set as the pressing angle. When the first pressing part (51) and the second pressing part (61) mesh, the two pressing angles relatively squeeze the paper straw to achieve deformation.

6. A cutting and pressing fixture for paper straws according to claim 1, characterized in that... The outer wall of the substrate (1) is rotatably connected to a straightening wheel (10); the straightening wheel (10) is closely fitted with the feeding shaft (3); the straightening wheel (10) is located on the upper side of the feeding shaft (3). When the paper straw is placed in the placement groove (5), the paper straw is first pressed into the placement groove (5) by the straightening wheel (10).

7. A cutting and pressing fixture for paper straws according to claim 1, characterized in that... The outer wall of the substrate (1) is rotatably connected to an auxiliary wheel (101); there are two auxiliary wheels (101); the auxiliary wheels (101) are closely fitted with the feed shaft (3); the two auxiliary wheels (101) are respectively set on the upper and lower sides of the pressing shaft (6). When the paper straw passes the straightening wheel (10), it is first further compacted by one auxiliary wheel (101), then pressed and deformed by the pressing shaft (6), and then further passes by another auxiliary wheel (101) before falling off by its own gravity.

Images