A hot cutting device for the handle of a single-sided or double-sided non-filmed woven bag

Abstract

The present invention provides a single-sided or double-sided non-laminated woven bag handle mouth hot cutting device, which includes a waste pressing and positioning mechanism, a hot cutting mechanism, and a hollow base; the waste pressing and positioning mechanism includes a first fixed mounting seat, a thimble mounting block, and a thimble downward pushing mechanism; the hot cutting mechanism includes an annular heating block and a hollow annular hot cutting knife, and the hollow annular hot cutting knife is used to perform hot cutting on the handle mouth of the woven bag; the hollow base is located directly below the hollow annular hot cutting knife, and the waste pressing and positioning mechanism is sleeved inside the hollow annular hot cutting knife. When the lower part of the thimble cylinder is not blocked by the woven bag, the thimble can extend from the lower part of the hollow annular hot cutting knife under the push of the thimble downward pushing mechanism. During the hot punching and cutting process of the handle mouth by this device, the waste is penetrated and fixed by the thimble, thereby achieving high-quality and stable cutting of the handle mouth; after cutting, the downward and upward movements of the thimble can solve the problem of waste removal, enabling the hot cutting process to proceed continuously.

Description

Technical Field

[0001] The present invention relates to the technical field of woven bag processing, and in particular to a hot cutting device for the handle opening of single-sided or double-sided non-coated woven bags. Background Art

[0002] Existing woven bags in the market are classified according to film coating, mainly divided into three categories: double-sided non-coated, single-sided coated, and double-sided coated. All of the above three types of woven bags have handle openings (as shown in Figure 12 ), and the handle openings are used to facilitate the grasping of the woven bags. For double-sided coated bag types, the technology for punching the handle openings has been relatively mature, mainly using a mold and a cylinder for cold punching. For double-sided non-coated and single-sided coated bag types, when cold punching the handle openings, since the outer periphery of the edge of the handle opening is not covered by a film, the plastic woven flat filaments along the edge of the handle opening will be scattered (disordered). If the flat filaments are scattered, it does not meet the packaging requirements of the woven bag. Therefore, for the handle openings of these two bag types, the process requires hot punching. The current method of hot punching the handle openings of double-sided non-coated and single-sided coated bag types is to manually punch the handle openings one by one. When manually hot punching the handle openings, there is a problem that the hot cutting waste is not easy to separate from the cutting knife. When the waste adheres to the cutting knife, it needs to be manually removed, which greatly reduces the cutting efficiency. At the same time, when manually using a circular hot cutting knife for cutting, if the plastic woven bag is in an ideal flat state (that is, the woven bag is in a high-strength tension state and very flat), then when the circular hot cutting knife moves down for cutting the plastic woven bag, the synchronous cutting of the edge of the handle opening can be achieved, thus realizing the cutting process of the handle opening. However, due to processing conditions, before cutting the woven bag, its tension and flatness have certain defects, resulting in the circular hot cutting knife being unable to achieve the synchronous cutting of the edge of the handle opening during the downward cutting process. After one part of the handle opening is cut off, the waste below the circular hot cutting knife no longer maintains a tension state, so when continuing to cut, the waste moves down to a certain extent with the cutting knife, making the cutting knife unable to completely cut off the waste. Summary of the Invention

[0003] The purpose of the present invention is to provide a hot cutting device for the handle opening of single-sided or double-sided non-coated woven bags. During the hot punching process of the handle opening, the waste is fixed by the thimble passing through it, thus realizing high-quality and stable cutting of the handle opening. After cutting, the waste is pressed by the thimble under the waste baffle. When the thimble rises, the waste baffle realizes the separation of the thimble and the waste, effectively solving the problem of waste removal and enabling the hot cutting process to proceed continuously.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a single-sided or double-sided non-film-covered woven bag handle hot cutting device, including a waste pressing and positioning mechanism, a hot cutting mechanism, and a hollow base; the waste pressing and positioning mechanism includes a first fixed mounting seat, an ejector mounting block, and an ejector downward pushing mechanism, a plurality of ejectors are arranged at the lower part of the ejector mounting block, each of the ejectors includes an ejector column and an ejector head, the ejector head is fixedly arranged at the lower part of the ejector column, and the ejector downward pushing mechanism is used to realize the sliding connection between the ejector mounting block and the first fixed mounting seat; the hot cutting mechanism includes an annular heating block and a hollow annular hot cutting knife, and the hollow annular hot cutting knife is vertically fixedly sleeved on the In the middle part of the annular heating block, the hollow annular hot cutter is used to realize the hot cutting of the handle of the woven bag; the hollow base is located directly below the hollow annular hot cutter, and a waste baffle is arranged on the hollow base, and there is an annular opening corresponding to the bottom of the hollow annular hot cutter at the upper and lower parts of the waste baffle, and an oblong hole for the ejector pin to pass through is arranged on the waste baffle, and a plurality of retaining teeth for blocking the waste from moving up are arranged on the two side walls of the oblong hole; the waste pressing and positioning mechanism is sleeved in the hollow annular hot cutter, and when the lower part of the ejector pin column is not blocked by the woven bag, the ejector pin can extend from the lower part of the hollow annular hot cutter under the push of the ejector pin downward pushing mechanism.

[0005] Preferably, the device further comprises a peripheral pressing and positioning mechanism, which is used to achieve the pressing and positioning of the peripheral part of the woven bag at the cutting position during cutting.

[0006] Furthermore, the device also includes a hot-cut driving mechanism, which can drive the waste pressing and positioning mechanism and the hot-cut mechanism to perform a reciprocating cycle of descending, stationary, descending, and ascending movements in sequence.

[0007] Furthermore, the ejector downward pushing mechanism includes a first guide rod and a first pushing spring, the two first guide rods are located on both sides of the lower part of the first fixed mounting seat, and the first guide rod is slidably connected to the first fixed mounting seat, the lower part of the first guide rod is fixedly connected to the upper part of the ejector mounting block, and the first pushing spring is sleeved on the first guide rod and clamped between the first fixed mounting seat and the ejector mounting block.

[0008] Furthermore, the first fixed mounting seat and the hollow annular hot cutting knife are fixedly connected to a connecting plate.

[0009] Furthermore, the device also includes a whole machine support, the hot-cut driving mechanism includes a supporting base, a driving motor, a groove cam, a roller, a first transmission plate, and a second transmission plate, the supporting base is arranged on the whole machine support, the driving motor is arranged on the supporting base, the groove cam is a circular structure, and an irregular arc groove distributed around the center of the groove cam is arranged on the rear side wall of the communication cam, the output shaft of the driving motor is fixedly connected to the rear side wall of the groove cam, and the output shaft is coaxially distributed with the central axis of the groove cam, the roller is sleeved in the irregular arc groove, when the driving motor drives the groove cam to rotate one circle, the roller drives the irregular arc groove to perform descending, stationary, descending, and ascending motion processes in sequence, the two sides of the first transmission plate are sleeved on two vertical guide rails arranged on the supporting base, the roller is used to drive the first transmission plate to move, the second transmission plate is fixedly arranged at the lower part of the first transmission plate, and the connecting plate is fixedly connected to the second transmission plate.

[0010] Furthermore, the hollow base is arranged in a groove on the support platform of the whole machine bracket, and the upper plane of the hollow base is flush with the upper plane of the support platform.

[0011] Furthermore, the peripheral pressing and positioning mechanism includes an annular strut and an annular pressure rod, the annular strut is fixedly connected to the second transmission plate through a plurality of connecting rods, and the annular strut is located at the lower periphery of the hollow annular hot cutting knife; two second guide rods are fixedly arranged on the upper part of the annular pressure rod, the upper part of the second guide rod is slidably sleeved on the second transmission plate, a second spring is sleeved on the second guide rod, and the second spring always applies an elastic force to the annular pressure rod; the annular pressure rod is located at the periphery of the annular strut, and in the initial working state, the bottom plane of the annular pressure rod is lower than the bottom plane of the annular strut.

[0012] Furthermore, two first rollers are arranged at the rear of the support platform, and the two first rollers are used to clamp the woven bag up and down. A second roller is arranged at the front of the support platform, and the second roller is used to support the bottom of the woven bag.

[0013] The beneficial effects of the present invention are as follows: The present invention uses a mechanical automation method to replace manual labor in the hot cutting process of the handle opening of woven bags. It can greatly improve the cutting efficiency and the cutting quality is stable. At the same time, it can greatly reduce the manual labor intensity. During the cutting process, within a period of time when the hollow ring hot cutting knife is driven by the hot cutting drive mechanism and remains relatively stationary with the woven bag, the process of warming the woven bag is realized. After the woven bag is warmed, it is beneficial for the subsequent hollow ring hot cutting knife to perform hot punching on it. And because the hollow ring hot cutting knife is also in a high-temperature state during the punching process, during the cutting process, the hot melting of the broken ends of the plastic flat filaments around the handle opening can be realized. After the hot-melted broken ends of the flat filaments cool and solidify, the entire edge of the handle opening is hot-melt sealed, thereby preventing the broken ends of the flat filaments around the handle opening from spreading, ensuring the hot cutting quality of the handle opening. In the initial stage of the cutting process, the tip of the ejector pin penetrates the middle of the waste material. Subsequently, during the cutting process, it can prevent the waste material from moving. At the same time, the lower part of the ejector pin cylinder presses against the upper surface of the waste material, making the waste material in a pressed and tensioned state, and then facilitating the subsequent effective cutting of the tensioned woven bag by the hollow ring hot cutting knife. After cutting, the waste material moves under the push of the ejector pin cylinder to the lower part of the waste material baffle. When the ejector pin rises, the waste material is separated from the ejector pin by the blocking action of the waste material baffle. The waste material separated from the ejector pin directly falls into the waste material box under the action of gravity, thus realizing the effective cleaning of the waste material and ensuring the smooth progress of the cutting work. The hot cutting drive mechanism can drive the waste material pressing and positioning mechanism and the hot cutting mechanism to perform a reciprocating cyclic motion of descending, stationary, descending, and ascending movement processes in sequence, thereby ensuring the intermittent and orderly progress of the cutting work, and then facilitating the realization of the mechanical automation of the handle opening hot cutting work and greatly improving the hot cutting efficiency. The peripheral pressing and positioning mechanism can ensure the stable pressing and positioning of the woven bag during the cutting process, making the woven bag always in a tensioned state, thereby helping to improve the cutting quality of the handle opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some preferred embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 It is a side view of the overall structure of the present invention;

[0017] Figure 3 It is a schematic diagram of the structure of the hollow ring hot cutting knife;

[0018] Figure 4It is a schematic structural diagram of a waste pressing and positioning mechanism;

[0019] Figure 5 It is a combined schematic diagram of a roller and a grooved cam;

[0020] Figure 6 It is a schematic diagram of the tuberculosis distribution of an annular heating block, a hollow annular hot cutting knife and a waste pressing and positioning structure;

[0021] Figure 7 It is a schematic structural diagram of a waste baffle;

[0022] Figure 8 It is a schematic structural diagram of a hollow base;

[0023] Figure 9 It is a schematic diagram of the blocking state of the ejector pin when the woven bag is not cut during the process of the woven bag being heated;

[0024] Figure 10 It is a schematic diagram of the state where the ejector pin presses the waste under the waste baffle after the woven bag is completely cut;

[0025] Figure 11 For Figure 1 The enlarged view of part A in

[0026] Figure 12 It is a schematic structural diagram of a woven bag with a handle opening;

[0027] In the figure: 11 The first fixed mounting base, 12 The ejector pin mounting block, 13 The ejector pin downward pushing mechanism, 131 The first guide rod, 132 The first pushing spring, 14 The ejector pin, 21 The annular heating block, 22 The hollow annular hot cutting knife, 221 The cutting blade, 3 The hollow base, 31 The waste baffle, 311 The long circular hole, 312 The retaining teeth, 313 The annular opening, 314 The slit opening, 41 The annular support rod, 411 The connecting rod, 42 The annular pressing rod, 421 The second guide rod, 422 The second spring, 51 The support base, 511 The vertical guide rail, 52 The driving motor, 53 The grooved cam, 531 The irregular arc groove, 54 The roller, 55 The first transmission plate, 56 The second transmission plate, 561 The connecting plate, 6 The whole machine support, 61 The support platform, 611 The groove, 7 The first roller shaft, 8 The second roller shaft, 9 The woven bag, 91 The waste, 101 The handle opening. Specific embodiments

[0028] Next, specific embodiments will be combined with the attached Figure 1-12 The technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some preferred embodiments of the present invention, rather than all embodiments. Those skilled in the art can make similar deformations without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0029] The present invention provides a single-sided or double-sided non-film coated woven bag handle hot cutting device (such as Figure 1As shown in the figure, it includes a waste pressing and positioning mechanism, a hot cutting mechanism, and a hollow base 3; the waste pressing and positioning mechanism includes a first fixed mounting base 11, a thimble mounting block 12, and a thimble downward probing and pushing mechanism 13. A number of thimbles 14 are provided at the lower part of the thimble mounting block 12. In practical applications, the number of thimbles 14 can be set to 3 - 7. In this specific embodiment, the number of thimbles 14 is set to 3. Each thimble 14 includes a thimble cylinder 141 and a thimble head 142. The thimble head 142 is fixedly arranged at the lower part of the thimble cylinder 141. In the actual application process, the diameter of the thimble cylinder 141 is at least more than twice larger than the diameter of the thimble head 142. Both the thimble cylinder 141 and the thimble head 142 are processed from high-temperature resistant materials. When pressing and positioning the waste, the thimble head 142 is used to penetrate the waste. When the thimble head 142 is inserted into the waste, it can effectively prevent the waste from moving along the radial direction of the thimble head 142. The lower end face of the thimble cylinder 141 pushes the waste after the waste is cut off from the woven bag; the thimble downward probing and pushing mechanism 13 is used to realize the sliding connection between the thimble mounting block 12 and the first fixed mounting base 11, that is, under the connection action of the thimble pushing mechanism 13, the thimble mounting block 12 can freely slide up and down relative to the first fixed mounting 11; the hot cutting mechanism includes an annular heating block 21 and a hollow annular hot cutting knife 22. The annular heating block 21 is a commonly used heating device in the field, and it generates heat through electric energy. The heat generation working principle of the annular heating block 21 will not be introduced in detail here; the hollow annular hot cutting knife 22 is vertically and fixedly sleeved in the middle of the annular heating block 21. When the annular heating block 21 continuously generates heat, the hollow annular hot cutting knife 22 located inside it is heated by heat transfer. In practical applications, the lower end of the hollow annular hot cutting knife 22 is a cutting end, and a circle of cutting blades 221 is provided on its lower outer edge. Since the hollow annular hot cutting knife 22 is used for cutting the handle opening 101, the lower shape of the hollow annular hot cutting knife 22 can be processed according to the size of the handle opening 101 to complete the cutting of the required size of the handle opening 101; the hollow base 3 is located directly below the hollow annular hot cutting knife 22. A waste baffle 31 is provided on the hollow base 3. There is an annular opening 313 corresponding to the bottom of the hollow annular hot cutting knife 22 above and below the waste baffle 31. Due to the existence of the annular opening 313, the hollow annular hot cutting knife 22 can cut the woven bag 9 in a suspended state, that is, when the woven bag 9 is tensioned and attached to the upper plane of the hollow base 3, there is an annular opening 313 between the woven bag 9 and the waste baffle 31, so that the lower part of the woven bag 9 is in a suspended state.When the cutting edge 221 of the hollow annular hot cutting knife 22 cuts the woven bag, since the middle part of the waste material is fixed by the ejector pin 14, during the downward pressing and cutting process of the hollow annular hot cutting knife 22, the smooth cutting of the woven bag is realized. Because the hollow annular hot cutting knife 22 performs suspended cutting, its cutting wear degree is small, which can greatly improve the service life of the hollow annular hot cutting knife 22. A long circular hole 311 for the ejector pin 14 to pass through downward is provided on the waste material baffle 31, and a number of retaining teeth 312 for preventing the waste material 91 from moving upward are provided on both side walls of the long circular hole 311; the waste material pressing and positioning mechanism is sleeved inside the hollow annular hot cutting knife 22. When the lower part of the ejector pin cylinder 141 is not blocked by the woven bag 9, the ejector pin 14 can extend out from the lower part of the hollow annular hot cutting knife 22 under the push of the ejector pin downward pushing mechanism 13. That is, at the initial stage of cutting, when the cutting edge 221 of the hollow annular hot cutting knife 22 does not contact the woven bag 9, at this time, the ejector pin head 142 has penetrated through the woven bag 9. At the same time, through the tension and blocking effect of the woven bag 9, the ejector pin downward pushing mechanism 13 pushes the lower end face of the ejector pin cylinder 141 to closely fit with the upper plane of the woven bag 9 (as Figure 9 shown); after the hollow annular hot cutting knife 22 continues to move downward to cut the woven bag 9, at this time the waste material 91 has been separated from the woven bag 9, so that the waste material 91 loses the blocking and limiting effect on the ejector pin cylinder 141. At this time, the ejector pin cylinder 141 continues to move downward relative to the hollow annular hot cutting knife 22 under the push of the ejector pin downward pushing mechanism 13. During the downward movement of the ejector pin cylinder 141, it drives the waste material 91 to synchronously pass through the long circular hole 311 and move to the lower part of the waste material baffle 31 (as Figure 10 shown; because the waste material 91 is a part of the woven bag 9 and has strong deformability under pressure, during the downward pressing process, it can deform and penetrate through the gap 314 between two opposite retaining teeth 312); when the ejector pin 14 moves upward synchronously with the hollow annular hot cutting knife 22, through the blocking effect of the retaining teeth 312 on the waste material 91, the waste material 91 can be separated from the ejector pin head 142, so that the waste material 91 is left under the waste material baffle 31. The waste material 91 can fall into the corresponding collection box under the action of gravity, and then the collection of the waste material 91 is realized. By using the above waste material pressing and positioning mechanism, hot cutting mechanism, and the structure of the hollow base 3, the effective positioning of the waste material 91 before cutting can be realized, which is convenient for realizing its subsequent effective cutting. And after cutting is completed, the effective removal and collection of the waste material 91 can be realized, which is convenient for improving the processing quality and processing efficiency of the handle opening 101.

[0030] Based on the above embodiments, during the cutting process, to facilitate the tensioning of the woven bag 9 around the cutting area, here, the hot cutting mechanism further includes a peripheral pressing and positioning mechanism; further, to facilitate the automation of the cutting of the handle opening 101, here, the hot cutting mechanism further includes a hot cutting driving mechanism. The hot cutting driving mechanism can drive the waste pressing and positioning mechanism and the hot cutting mechanism to perform a reciprocating cyclic motion of descending, stationary, descending, and ascending movement processes in sequence. When the hot cutting mechanism is in a stationary state, at this time, the cutting edge 221 of the hollow annular hot cutting knife 22 does not contact the woven bag 9. During the stationary period, the hollow annular hot cutting knife 22 realizes the heat warming process of the woven bag 9 below it. When the stationary state ends, the hollow annular hot cutting knife 22 continues to move downward, and during the downward movement, the waste 91 is cut.

[0031] Based on the above embodiments, the specific implementation manner of the hot cutting driving mechanism is as follows: The device further includes a whole machine bracket 6. The hot cutting driving mechanism includes a support base 51, a driving motor 52, a grooved cam 53, a roller 54, a first transmission plate 55, and a second transmission plate 56. The support base 51 is arranged on the whole machine bracket 6, and the driving motor 52 is arranged on the support base 51. To facilitate the precise control of the operation of the hot cutting driving mechanism, here, the driving motor 52 is a servo motor; the grooved cam 53 has a circular structure, and on the rear side wall of the grooved cam 53, there is an irregular arc-shaped groove 531 distributed around the center of the grooved cam 53. The output shaft of the driving motor 52 is fixedly connected to the rear side wall of the grooved cam 53, and the output shaft is coaxially distributed with the central axis of the grooved cam 53. The grooved cam 53 can be stably rotated by the driving motor 52. The roller 54 is sleeved in the irregular arc-shaped groove 531, and the roller 54 is stuck in the irregular arc-shaped groove 531. When the grooved cam 53 rotates, the roller 54 moves under the drive of the irregular arc-shaped groove 531. In this specific embodiment, to facilitate the hot cutting driving mechanism to drive the hollow annular hot cutting knife 22 to perform a descending, stationary, descending, and ascending cyclic motion, here, when the driving motor 52 drives the grooved cam 53 to rotate one circle, the roller 54 performs a descending, stationary, descending, and ascending movement process in sequence under the drive of the irregular arc-shaped groove 531. The two sides of the first transmission plate 55 are sleeved on two vertical guide rails 511 arranged on the support base 51. The roller 54 is used to drive the first transmission plate 55 to move. In practical applications, the other end of the roller 54 is connected to the first transmission plate 55, and the movement of the roller 54 drives the first transmission plate 55 to move synchronously; the second transmission plate 56 is fixedly arranged below the first transmission plate 55.

[0032] Further, on the basis of the above embodiments, the specific implementation manner of the thimble downward pushing mechanism 13 is as follows: The thimble downward pushing mechanism 13 includes a first guide rod 131 and a first pushing spring 132. The two first guide rods 131 are located on both sides of the lower part of the first fixed mounting seat 11, and the first guide rod 131 is slidably connected to the first fixed mounting seat 11. The lower part of the first guide rod 131 is fixedly connected to the upper part of the thimble mounting block 12. The first pushing spring 132 is sleeved on the first guide rod 131 and is clamped between the first fixed mounting seat 11 and the thimble mounting block 12. During the synchronous downward movement of the first fixed mounting seat 11 and the thimble mounting block 12, when the thimble mounting block 12 is blocked by the woven bag 9, it stops moving downward. At this time, as the first fixed mounting seat 11 continues to move downward, the upper end of the first guide rod 131 moves upward relative to the first fixed mounting seat 11, and at the same time, the first pushing spring 132 is compressed. After the woven bag 9 is cut, the blockage received by the thimble mounting block 12 is released. At this time, the thimble mounting block 12 continues to move downward under the push of the first pushing spring 132, and during the downward movement, the process of moving the waste 91 below the waste baffle 31 is completed, and then the removal of the waste 91 is completed; To facilitate the fixed connection between the hollow annular cutting knife 22 and the first fixed mounting seat 11, here, the first fixed mounting seat 11 and the hollow annular hot cutting knife 22 are fixedly connected by a connecting plate 561. Further, to facilitate the second transmission plate 56 to drive the hollow annular hot cutting knife 22 to move synchronously, here, the second transmission plate 56 is fixedly connected to the connecting plate 561.

[0033] Furthermore, on the basis of the above embodiments, the specific implementation manner of the peripheral pressing and positioning mechanism is as follows: The peripheral pressing and positioning mechanism includes an annular support rod 41 and an annular pressing rod 42. The annular support rod 41 is fixedly connected to the second transmission plate 56 through a plurality of connecting rods 411, and the annular support rod 41 is located at the lower periphery of the hollow annular hot cutter 22. Two second guide rods 421 are fixedly arranged on the upper part of the annular pressing rod 42. The upper parts of the second guide rods 421 are slidably sleeved on the second transmission plate 56. A second spring 422 is sleeved on the second guide rods 421, and the second spring 422 always exerts an elastic force on the annular pressing rod 42. The annular pressing rod 42 is located at the periphery of the annular support rod 41. In the initial working state, the bottom plane of the annular pressing rod 42 is lower than the bottom plane of the annular support rod 41. That is, in the process of the second transmission plate 56 driving the annular support rod 41 and the annular pressing rod 42 to move downward, the annular pressing rod 42 first contacts the woven bag 9, so as to realize the first pressing and positioning of a large range of the woven bag at the periphery of the cutting part. As the second transmission plate 56 continues to descend, the annular support rod 41 realizes the second pressing and positioning of a small range of the woven bag at the periphery of the cutting part. In the process of the annular support rod 41 pressing the woven bag 9, the hollow annular hot cutter 22 completes the cutting process of the handle opening 101.

[0034] Before cutting the handle opening 101, in order to facilitate the woven bag 9 to maintain a flat and tensioned state, here, the hollow base 3 is arranged in a groove 611 on the support platform 61 of the whole machine bracket 6, and the upper plane of the hollow base 3 is flush with the upper plane of the support platform 61. By using the support of the support platform 61 for the woven bag, the effective flat unfolding of the woven bag 9 is realized. Further, in order to facilitate the woven bag to stably maintain a flat unfolding state, here, two first roller shafts 7 are arranged at the rear part of the support platform 61. The two first roller shafts 7 are used to clamp the woven bag 9 up and down. A second roller shaft 8 is arranged at the front part of the support platform 61. The second roller shaft 8 is used to support the bottom of the woven bag 9.

[0035] In the initial cutting state, the hollow annular hot cutting knife 22, the ejector pin 14, the annular support rod 41 and the annular pressure rod 42 are all kept at a high position driven by the roller 54. After the groove cam 53 starts to rotate, the hollow annular hot cutting knife 22, the ejector pin 14, the annular support rod 41 and the annular pressure rod 42 all synchronously perform the first-stage descending action. After the first-stage descending action is completed in place, the annular pressure rod 42 presses and fixes the woven bag 9. At the same time, the ejector head 142 of the ejector pin 14 penetrates through the woven bag 9, and the lower end surface of the ejector pin cylinder 141 presses against the woven bag. When the first-stage descending action moves in place, at this time, during the continuous rotation of the groove cam 53, the hollow annular hot cutting knife 22, the ejector pin 14 and the annular support rod 41 remain stationary. During this stationary process, the hollow annular hot cutting knife 22 realizes the heat-warming process of the woven bag 9. As the groove cam 53 continues to rotate, the roller 54 continues to perform the second-stage descending action (at this time, the heat-warming process ends). During the second-stage descending process, the hollow annular hot cutting knife 22, the ejector pin 14 and the annular support rod 41 continue to move downward. After moving in place, the hollow annular hot cutting knife 22 cuts the woven bag 9. During the cutting process, the annular support rod 41 presses and positions the woven bag 9. After the cutting is completed, the ejector pin 14 pushes the waste downward. As the groove cam 53 continues to rotate, the second-stage descending action of the roller 54 ends, and then the roller 54 performs the ascending action. During the ascending action, the waste baffle 31 blocks the waste, thereby realizing the removal of the waste 91. When the roller 54 moves to the highest position, at this time, the hollow annular hot cutting knife 22, the ejector pin 14, the annular support rod 41 and the annular pressure rod 42 all return to the initial working position. When the next woven bag 9 arrives, the above work process is repeated, so as to realize the cutting process of the next handle opening 101.

[0036] In practical applications, to facilitate the groove cam 53 to drive the roller 54 to perform descending, stationary, descending and ascending movements during rotation, here, the irregular arc groove includes a first descending arc segment, a stationary arc segment, a second descending arc segment and an ascending arc segment. During the continuous rotation of the groove cam 53, when the roller 54 enters the first descending arc segment, the roller 54 performs the first-stage descending action. When the roller 54 enters the stationary arc segment, the roller 54 remains stationary up and down relative to the groove cam 53. When the roller 54 enters the second descending arc segment, the roller 54 performs the second-stage descending action. When the roller 54 enters the ascending arc segment, the roller 54 performs the ascending action.

[0037] During the actual working process, the highest position of the roller 54 can be located and detected by an optoelectronic detection switch. In the application, the optoelectronic detection switch is arranged on the support base 51, and a detection block is arranged on the output shaft of the driving motor 52. As the groove cam 53 rotates, when the groove cam 53 drives the roller 54 to move to the highest position, at this time, the optoelectronic detection switch just detects the detection block. After the controller receives the detection signal of the optoelectronic detection switch, it stops the rotation of the driving motor 52, and then realizes the stop of the roller 54 at the highest position.

[0038] In the present invention, "left" and "right" are relative positions adopted for the convenience of describing the position relationship, so they cannot be understood as absolute positions to limit the protection scope.

[0039] Except for the technical features described in the specification, they are all known technologies to those skilled in the art.

[0040] As described above, the preferred embodiments and examples of the present invention have been described in detail in conjunction with the drawings. However, the present invention is not limited to the above embodiments and examples. For those of ordinary skill in the art in this technical field, without departing from the concept of the present invention, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A single-sided or double-sided non-filmed woven bag handle hot cutting device, characterized in that: It includes a waste pressing and positioning mechanism, a hot cutting mechanism, and a hollow base; the waste pressing and positioning mechanism includes a first fixed mounting seat, a thimble mounting block, and a thimble downward pushing mechanism. A number of thimbles are provided at the lower part of the thimble mounting block. Each thimble includes a thimble cylinder and a thimble head. The thimble head is fixedly arranged at the lower part of the thimble cylinder. The thimble downward pushing mechanism is used to realize the sliding connection between the thimble mounting block and the first fixed mounting seat; the hot cutting mechanism includes an annular heating block and a hollow annular hot cutting knife. The hollow annular hot cutting knife is vertically and fixedly sleeved in the middle of the annular heating block. The hollow annular hot cutting knife is used to realize the hot cutting of the handle opening of the woven bag. The hollow base is located directly below the hollow annular hot cutting knife. A waste baffle is arranged on the hollow base. There is an annular opening corresponding to the bottom of the hollow annular hot cutting knife above and below the waste baffle. A long circular hole for the thimble to pass through is arranged on the waste baffle. A number of retaining teeth for preventing the waste from moving up are arranged on both side walls of the long circular hole; the waste pressing and positioning mechanism is sleeved in the hollow annular hot cutting knife. When the lower part of the thimble cylinder is not blocked by the woven bag, the thimble can extend from the lower part of the hollow annular hot cutting knife under the push of the thimble downward pushing mechanism.

2. The single-sided or double-sided non-film coated woven bag handle hot cutting device according to claim 1 is characterized in that: The device also includes a peripheral pressing and positioning mechanism, which is used to realize the pressing and positioning of the peripheral part of the cutting part of the woven bag during cutting.

3. The device for hot cutting the handle of a single-sided or double-sided non-film-coated woven bag according to claim 2 is characterized in that: The device also includes a hot cutting driving mechanism, which can drive the waste pressing and positioning mechanism and the hot cutting mechanism to perform a reciprocating cyclic motion of the motion process of descending, staying still, descending, and ascending in sequence.

4. The device for hot cutting the handle of a single-sided or double-sided non-film-coated woven bag according to claim 3 is characterized in that: The thimble downward pushing mechanism includes a first guide rod and a first pushing spring. The two first guide rods are located on both sides of the lower part of the first fixed mounting seat, and the first guide rod is slidably connected with the first fixed mounting seat. The lower part of the first guide rod is fixedly connected with the upper part of the thimble mounting block. The first pushing spring is sleeved on the first guide rod and is clamped between the first fixed mounting seat and the thimble mounting block.

5. The device for hot cutting the handle of a single-sided or double-sided non-film-coated woven bag according to claim 4 is characterized in that: Both the first fixed mounting seat and the hollow annular hot cutting knife are fixedly connected to a connecting plate.

6. The device for hot cutting the handle of a single-sided or double-sided non-film-coated woven bag according to claim 5 is characterized in that: The device also includes a whole machine support, and the hot-cut driving mechanism includes a supporting base, a driving motor, a groove cam, a roller, a first transmission plate, and a second transmission plate. The supporting base is arranged on the whole machine support, and the driving motor is arranged on the supporting base. The groove cam is a circular structure, and an irregular arc groove distributed around the center of the groove cam is arranged on the rear side wall of the groove cam. The output shaft of the driving motor is fixedly connected to the rear side wall of the groove cam, and the output shaft is coaxially distributed with the central axis of the groove cam. The roller is sleeved in the irregular arc groove. When the driving motor drives the groove cam to rotate one circle, the roller performs a descending, stationary, descending, and ascending motion process in sequence under the drive of the irregular arc groove. Both sides of the first transmission plate are sleeved on two vertical guide rails arranged on the supporting base. The roller is used to drive the first transmission plate to move. The second transmission plate is fixedly arranged at the lower part of the first transmission plate, and the connecting plate is fixedly connected to the second transmission plate.

7. The device for hot cutting the handle of a single-sided or double-sided non-film-coated woven bag according to claim 6 is characterized in that: The hollow base is arranged in a groove on the support platform of the whole machine bracket, and the upper plane of the hollow base is flush with the upper plane of the support platform.

8. The device for hot cutting the handle of a single-sided or double-sided non-film-coated woven bag according to claim 6 is characterized in that: The peripheral pressing and positioning mechanism includes an annular support rod and an annular pressure rod. The annular support rod is fixedly connected to the second transmission plate through a plurality of connecting rods, and the annular support rod is located at the lower periphery of the hollow annular hot cutting knife; two second guide rods are fixedly arranged on the upper part of the annular pressure rod, and the upper part of the second guide rod is slidably sleeved on the second transmission plate, and a second spring is sleeved on the second guide rod, and the second spring always applies an elastic force to the annular pressure rod; the annular pressure rod is located at the periphery of the annular support rod, and in the initial working state, the bottom plane of the annular pressure rod is lower than the bottom plane of the annular support rod.

9. The device for hot cutting the handle of a single-sided or double-sided non-film coated woven bag according to claim 7, characterized in that: Two first rollers are arranged at the rear of the support platform, and the two first rollers are used to clamp the woven bag up and down. A second roller is arranged at the front of the support platform, and the second roller is used to support the bottom of the woven bag.

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