Portable polyurethane edge-covered sieve plate production device

Abstract

The invention belongs to the technical field of polyurethane processing, and discloses a portable polyurethane edge-covered sieve plate production device which comprises a workbench and a first electric telescopic rod which penetrates through the workbench and is fixedly connected with the workbench, and a first lower mold is fixedly mounted at the upper end of the first electric telescopic rod; a second lower mold matched with the first lower mold is fixed to the upper surface of the workbench, an edge covering groove is formed between the first lower mold and the second lower mold, and four grinding plates distributed around the first lower mold and a driving mechanism used for driving the grinding plates to move in a rectangular path are arranged above the workbench. Four second electric telescopic rods distributed around the second lower mold are vertically fixed to the upper surface of the workbench, a bearing table is fixedly installed at the upper ends of the second electric telescopic rods, and a linkage mechanism used for driving the grinding plate to rotate to be distributed parallel to the workbench is arranged above the workbench.

Description

Technical Field

[0001] The present invention belongs to the technical field of polyurethane processing, and specifically relates to a portable production device for polyurethane edge - wrapped sieve plates. Background Art

[0002] Polyurethane, whose full name is polycarbamate, is a polymer material formed by the polycondensation reaction of polyols and polyisocyanates and has excellent mechanical properties, with extremely strong plasticity.

[0003] The polyurethane edge - wrapped sieve is a process achieved by wrapping polyurethane materials around the edges or specific parts of the sieve plate. This design combines the structural strength of metals or other substrates with the wear - resistance, impact - resistance, etc. of polyurethane, and is widely used in screening equipment in industries such as mining, metallurgy, and construction.

[0004] In the existing production of polyurethane edge - wrapped sieve plates, the sieve plate is often placed in a mold adapted to it, and then liquid polyurethane material is poured into the mold to fill the edge - wrapped area, and it is cured at room temperature or by heating to form an elastic edge - wrapped layer. After the edge - wrapped layer is formed, the burrs on its surface need to be polished. Traditional manual polishing often consumes a large amount of labor. Summary of the Invention

[0005] To solve the problem of large labor consumption in manual polishing proposed in the above - mentioned background art, the present invention provides a portable production device for polyurethane edge - wrapped sieve plates.

[0006] To achieve the above object, the present invention provides the following technical solution: A portable production device for polyurethane edge - wrapped sieve plates, including a workbench, and an electric telescopic rod one penetrating through the workbench and fixedly connected to the workbench. The upper end of the electric telescopic rod one is fixedly installed with a lower mold one. The upper surface of the workbench is fixed with a lower mold two adapted to the lower mold one. A edge - wrapped groove is formed between the lower mold one and the lower mold two. Above the workbench, there are four grinding plates distributed around the lower mold one, and a driving mechanism for driving the grinding plates to move along a rectangular path. The upper surface of the workbench is vertically fixed with four electric telescopic rods two distributed around the lower mold two. The upper end of the electric telescopic rod two is fixedly installed with a bearing platform. Above the workbench, there is a linkage mechanism for driving the grinding plates to rotate and be parallel to the workbench.

[0007] Preferably, the driving mechanism includes an L - shaped plate and a round rod fixed on the upper surface of the workbench. The free end of the round rod is fixedly connected with a sliding rod one. A sliding sleeve one is sleeved on the sliding rod one and is slidably connected to it. The surface of the sliding sleeve one is vertically fixed with a sliding rod two. A sliding sleeve two is sleeved on the sliding rod two and is slidably connected to it.

[0008] Preferably, an annular shaft rotatably connected to the second sliding sleeve is sleeved on the second sliding sleeve, a mounting seat fixedly connected to the annular shaft is sleeved on the annular shaft, a first motor is mounted on the mounting seat, and a grinding plate is mounted on the output end of the first motor.

[0009] Preferably, a second motor is fixedly mounted on the L-shaped plate, a third sliding sleeve is mounted on the output end of the second motor, a third sliding rod telescopically connected to the third sliding sleeve penetrates through the third sliding sleeve, and a stop block is fixedly connected to one end of the third sliding rod.

[0010] Preferably, a first spring sleeved on the third sliding rod is fixedly connected between the stop block and the third sliding sleeve, and the stop block is rotatably connected to the second sliding sleeve.

[0011] Preferably, the linkage mechanism includes a vertical rod fixed to the surface of the second sliding sleeve, a circular seat is fixedly connected to the lower end of the vertical rod, a hollow shaft is rotatably connected to the inner wall of the circular seat, and a first gear fixedly connected to the hollow shaft is sleeved on the surface of the hollow shaft.

[0012] Preferably, two vertical rods are vertically fixed on the upper surface of the workbench, and the same rack is fixedly connected to the upper ends of the two vertical rods. The rack and the first gear are at the same horizontal height.

[0013] Preferably, a circular shaft vertically distributed with the second sliding sleeve is rotatably connected to the surface of the second sliding sleeve, a first bevel gear fixedly connected to the circular shaft is sleeved on the circular shaft, a second bevel gear fixedly connected to the annular shaft is sleeved on the annular shaft, and the second bevel gear meshes with the first bevel gear.

[0014] Preferably, a ratchet wheel fixedly connected to the circular shaft is sleeved on the lower end of the circular shaft, a ratchet tooth is rotatably connected to the inner wall of the hollow shaft, the ratchet tooth meshes with the ratchet wheel, a second spring is fixedly connected to the surface of the ratchet tooth, and the end of the second spring away from the ratchet tooth is fixedly connected to the inner wall of the hollow shaft.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The first electric telescopic rod can push the first lower mold to move in the vertical direction. After the first lower mold drives the sieve plate placed on its upper surface to move downward into the second lower mold, the liquid polyurethane material can be poured into the edge wrapping groove for pouring and edge wrapping. After the edge wrapping work is completed, the first electric telescopic rod can push the first lower mold and the sieve plate to move upward to complete the unloading work. By setting the driving mechanism, the grinding plate can be driven to move along a rectangular path and can also reciprocate along the horizontal direction. When the electric telescopic rod drives the lower die 1 to move upward to the same height as the grinding plate, directly place the screen plate to be edge-wrapped on the lower die 1. Drive the grinding plate to move horizontally through the driving mechanism, so that all four grinding plates move toward the side close to the lower die 1 and abut against the side walls of the lower die 1 and the screen plate, completing the positioning work of the screen plate, and enabling the screen plate to be at the center position between the lower die 1 and the lower die 2 before edge wrapping; After the edge wrapping work is completed, the electric telescopic rod 1 drives the lower die 1 and the screen plate to move upward to the same height as the grinding plate, and drives the grinding plate to move toward the side close to the screen plate through the driving mechanism, so that the grinding plate rotates while fitting against the side wall of the edge wrapping layer to perform grinding work on the side wall of the edge wrapping layer; And while the grinding plate is rotating, it is driven by the driving mechanism to move horizontally along the side wall of the edge wrapping layer; When the side wall of the edge wrapping layer of the screen plate is polished, it can be placed on the bearing platform; Drive the grinding plate to rotate 90 degrees through the connecting mechanism, so that the grinding plate is in a state parallel to the workbench. Then drive the bearing platform to move upward through the electric telescopic rod 2, so that the edge wrapping layer fits against the surface of the grinding plate. At this time, drive the grinding plate to rotate, and at the same time drive the grinding plate to move along a rectangular path through the driving mechanism, that is, move along the edge wrapping layer, and polish the upper surface of the edge wrapping layer; Then place the screen plate on the bearing platform in reverse, and let the grinding plate polish the other side of the edge wrapping layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic structural diagram of the combination of the lower die 1 and the lower die 2 in the present invention; Figure 3 is the present invention Figure 1 is an enlarged structural diagram of part B in the present invention; Figure 4 is a schematic structural diagram of the position of the rack in the present invention; Figure 5 is a schematic structural diagram of the position of the annular shaft in the present invention; Figure 6 is a schematic structural diagram of the mounting seat in the present invention; Figure 7 is a schematic structural diagram of the position of the hollow shaft in the present invention; Figure 8 is the present invention Figure 5 is an enlarged structural diagram of part A in the present invention.

[0017] In the figure: 1, workbench; 21, first electric telescopic rod; 22, first lower mold; 23, second lower mold; 24, edge wrapping groove; 3, grinding plate; 41, second electric telescopic rod; 42, bearing platform; 51, L-shaped plate; 52, round rod; 53, first sliding rod; 54, first sliding sleeve; 55, second sliding rod; 56, second sliding sleeve; 57, annular shaft; 58, mounting seat; 59, first motor; 510, second motor; 511, third sliding sleeve; 512, third sliding rod; 513, stop block; 514, first spring; 61, vertical rod; 62, annular seat; 63, hollow shaft; 64, first gear; 65, vertical rod; 66, rack; 67, round shaft; 68, first bevel gear; 69, second bevel gear; 610, ratchet wheel; 611, ratchet teeth; 612, second spring. Detailed implementation manner

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] As Figures 1 to 3 shown, the present invention provides a portable polyurethane edge-wrapped sieve plate production device, including a workbench 1, and a first electric telescopic rod 21 passing through and fixedly connected to the workbench 1. The upper end of the first electric telescopic rod 21 is fixedly installed with a first lower mold 22. A second lower mold 23 adapted to the first lower mold 22 is fixed on the upper surface of the workbench 1. An edge wrapping groove 24 is formed between the first lower mold 22 and the second lower mold 23.

[0020] Among them, the first electric telescopic rod 21 can push the first lower mold 22 to move in the vertical direction. After the first lower mold 22 drives the sieve plate placed on its upper surface to move downward into the second lower mold 23, liquid polyurethane material can be poured into the edge wrapping groove 24 for casting and edge wrapping. After the edge wrapping work is completed, the first electric telescopic rod 21 can push the first lower mold 22 and the sieve plate to move upward to complete the unloading work.

[0021] As Figure 1 shown, four grinding plates 3 distributed around the first lower mold 22 are arranged above the workbench 1, and a driving mechanism for driving the grinding plates 3 to move along a rectangular path is provided.

[0022] Among them, each grinding plate 3 corresponds to a driving mechanism; By setting the driving mechanism, the grinding plates 3 can be driven to move along a rectangular path and can also move reciprocally along the horizontal direction; When the electric telescopic rod 21 drives the lower die 22 to move upward to the same height as the grinding plate 3, the sieve plate to be edge-wrapped is directly placed on the lower die 22. The driving mechanism drives the grinding plate 3 to move horizontally, so that all four grinding plates 3 move toward the side close to the lower die 22 and abut against the side walls of the lower die 22 and the sieve plate, completing the positioning of the sieve plate and enabling the sieve plate to be centered between the lower die 22 and the lower die 23 before edge-wrapping; Subsequently, after the lower die 22 moves downward into the lower die 23, pouring and edge-wrapping are carried out; when the edge-wrapping work is completed, the electric telescopic rod 21 drives the lower die 22 and the sieve plate to move upward to the same height as the grinding plate 3, and the driving mechanism drives the grinding plate 3 to move toward the side close to the sieve plate, making the grinding plate 3 rotate while fitting against the side wall of the edge-wrapped layer to polish the side wall of the edge-wrapped layer; And while the grinding plate 3 is rotating, it is driven by the driving mechanism to move horizontally along the side wall of the edge-wrapped layer.

[0023] As Figure 1 shown, four electric telescopic rods 41 distributed around the lower die 23 are vertically fixed on the upper surface of the workbench 1. A bearing platform 42 is fixedly installed at the upper end of the electric telescopic rod 41. Above the workbench 1, a linkage mechanism is provided for driving the grinding plate 3 to rotate to be parallel to the workbench 1.

[0024] When the side wall of the edge-wrapped layer of the sieve plate is polished, it can be placed on the bearing platform 42; By driving the grinding plate 3 to rotate 90 degrees, the grinding plate 3 is in a state parallel to the workbench 1. Then, the electric telescopic rod 41 drives the bearing platform 42 to move upward, so that the edge-wrapped layer fits on the surface of the grinding plate 3. At this time, the grinding plate 3 is driven to rotate, and at the same time, the driving mechanism drives the grinding plate 3 to move along a rectangular path, that is, along the edge-wrapped layer, to polish the upper surface of the edge-wrapped layer; Then, the sieve plate is placed on the bearing platform 42 in reverse to let the grinding plate 3 polish the other side of the edge-wrapped layer.

[0025] As Figure 1 、 Figure 4 、 Figure 5 and Figure 6 shown, the driving mechanism includes an L-shaped plate 51 and a round rod 52 fixed on the upper surface of the workbench 1. The free end of the round rod 52 is fixedly connected with a first sliding rod 53. A first sliding sleeve 54 that is slidably connected to it is sleeved on the first sliding rod 53. A second sliding rod 55 is vertically fixed on the surface of the first sliding sleeve 54. A second sliding sleeve 56 that is slidably connected to it is sleeved on the second sliding rod 55.

[0026] With the above structure, the second sliding sleeve 56 can slide along the second sliding rod 55, and the second sliding rod 55 and the first sliding sleeve 54 can slide along the first sliding rod 53, so that the second sliding sleeve 56 can finally move in two different directions.

[0027] As Figure 5 and Figure 6 shown, a ring-shaped shaft 57 rotatably connected to the second sliding sleeve 56 is sleeved on the second sliding sleeve 56, a mounting seat 58 fixedly connected to the ring-shaped shaft 57 is sleeved on the ring-shaped shaft 57, a first motor 59 is installed on the mounting seat 58, and a grinding plate 3 is installed at the output end of the first motor 59.

[0028] By installing the grinding plate 3 on the ring-shaped shaft 57, the working angle of the grinding plate 3 can be changed, so that the grinding plate 3 can work perpendicular to the workbench 1 or parallel to the workbench 1.

[0029] As Figure 4 and Figure 5 shown, a second motor 510 is fixedly installed on the L-shaped plate 51, a third sliding sleeve 511 is installed at the output end of the second motor 510, a third sliding rod 512 telescopically connected to the third sliding sleeve 511 penetrates through the third sliding sleeve 511, one end of the third sliding rod 512 is fixedly connected with a stop block 513, a first spring 514 sleeved on the third sliding rod 512 is fixedly connected between the stop block 513 and the third sliding sleeve 511, and the stop block 513 is rotatably connected to the second sliding sleeve 56.

[0030] When the second motor 510 drives the third sliding sleeve 511 to rotate, the third sliding sleeve 511 can drive the third sliding rod 512 to rotate along with it. The third sliding rod 512 can drive the second sliding sleeve 56 to slide along the second sliding rod 55 through the stop block 513, and can also push the second sliding rod 55 and the first sliding sleeve 54 to slide along the first sliding rod 53 through the second sliding sleeve 56. Finally, the second sliding sleeve 56 can move along the path indicated by the arrow in Figure 4 and the second sliding sleeve 56 can drive the grinding plate 3 to move along with it through the ring-shaped shaft 57.

[0031] As Figure 7 shown, the linkage mechanism includes a vertical rod 61 fixed on the surface of the second sliding sleeve 56. The lower end of the vertical rod 61 is fixedly connected with an annular seat 62. A hollow shaft 63 is rotatably connected to the inner wall of the annular seat 62, and a first gear 64 fixedly connected to the hollow shaft 63 is sleeved on the surface of the hollow shaft 63.

[0032] As Figure 1 and Figure 4 shown, two vertical rods 65 are vertically fixed on the upper surface of the workbench 1, and the same rack 66 is fixedly connected to the upper ends of the two vertical rods 65. The rack 66 and the first gear 64 are at the same horizontal height.

[0033] Among them, the first gear 64 can be engaged with the rack 66 when it moves to the position of the rack 66.

[0034] Wherein, two vertical standpipes 65 fixed to the workbench 1 respectively correspond to the outside of each carrier 42.

[0035] As Figure 5 、 Figure 7 and Figure 8 shown, a circular shaft 67 vertically distributed therewith is rotatably connected to the surface of the second sliding sleeve 56. A first bevel gear 68 fixedly connected therewith is sleeved on the circular shaft 67. A second bevel gear 69 fixedly connected therewith is sleeved on the annular shaft 57. The second bevel gear 69 meshes with the first bevel gear 68.

[0036] As Figure 8 shown, a ratchet wheel 610 fixedly connected therewith is sleeved on the lower end of the circular shaft 67. A ratchet tooth 611 is rotatably connected to the inner wall of the hollow shaft 63. The ratchet tooth 611 meshes with the ratchet wheel 610. A second spring 612 is fixedly connected to the surface of the ratchet tooth 611. One end of the second spring 612 away from the ratchet tooth 611 is fixedly connected to the inner wall of the hollow shaft 63.

[0037] Working principle of the present invention: When the second motor 510 drives the third sliding sleeve 511 to rotate, the third sliding sleeve 511 can drive the third sliding rod 512 to rotate therewith. The third sliding rod 512 can drive the second sliding sleeve 56 to slide along the second sliding rod 55 through the block 513, and can also push the second sliding rod 55 and the first sliding sleeve 54 to slide along the first sliding rod 53 through the second sliding sleeve 56. Finally, the second sliding sleeve 56 can move along the path indicated by the arrow in Figure 4 , and the second sliding sleeve 56 can drive the grinding plate 3 to move therewith through the annular shaft 57; First, the first electric telescopic rod 21 drives the first lower mold 22 to move upward to the same height as the grinding plate 3, and directly place the sieve plate to be edge-wrapped on the first lower mold 22; Then drive the grinding plate 3 to move along the first sliding rod 53 toward the side close to the first lower mold 22, so that the four grinding plates 3 abut against the side walls of the first lower mold 22 and the sieve plate, completing the positioning work of the sieve plate, and enabling the sieve plate to be located at the center position between the first lower mold 22 and the second lower mold 23 before edge-wrapping; When the first lower mold 22 drives the sieve plate placed on its upper surface to move downward into the second lower mold 23, the liquid polyurethane material can be poured into the edge-wrapping groove 24 for casting edge-wrapping; After the edge-wrapping work is completed, the first electric telescopic rod 21 drives the first lower mold 22 and the sieve plate to move upward to the same height as the grinding plate 3. Then drive the grinding plate 3 to move along the first sliding rod 53 toward the side close to the first lower mold 22 again. The four grinding plates 3 abut against the side wall of the edge-wrapped layer, and drive the grinding plate 3 to rotate through the first motor 59, so that the grinding plate 3 grinds the side wall of the edge-wrapped layer; Moreover, while rotating, the grinding plate 3 is driven by the driving mechanism to move horizontally along the side wall of the edge wrapping layer, that is, to reciprocate along the second slide bar 55; When the grinding plate 3 is at the end of the second slide bar 55 away from the first sliding sleeve 54, the grinding plate 3 can only be at the central position of the edge of the sieve plate, such as Figure 1 the state shown. Then, when the grinding plate 3 moves along the second slide bar 55, it cannot finish grinding one edge of the edge wrapping layer; At this time, the external motor drives the first electric telescopic rod 21 to rotate 180 degrees. The first electric telescopic rod 21 drives the first lower mold 22 and the sieve plate to rotate 180 degrees accordingly, and then the remaining part of the edge wrapping layer is ground by the grinding plate 3; When the side wall of the edge wrapping layer of the sieve plate is ground well, it can be placed on the bearing table 42; Drive the second sliding sleeve 56 to drive the first gear 64 to move along the second slide bar 55 towards the side close to the first sliding sleeve 54, so that the first gear 64 meshes with the rack 66. At this time, since the ratchet wheel 610 does not rotate, then drive the second slide bar 55 and the first sliding sleeve 54 to reciprocate along the first slide bar 53. The second slide bar 55 can drive the first gear 64 to reciprocate along the first slide bar 53 through the second sliding sleeve 56. When the first gear 64 moves away from the round rod 52, since the first gear 64 and the rack 66 are in a meshing state, the first gear 64 will rotate when moving. The first gear 64 can drive the ratchet teeth 611 to rotate through the hollow shaft 63. The ratchet teeth 611 can drive the ratchet wheel 610 to rotate accordingly. The ratchet wheel 610 can drive the round shaft 67 and the first bevel gear 68 to rotate. The first bevel gear 68 can drive the second bevel gear 69 to rotate. The second bevel gear 69 can drive the annular shaft 57 to rotate. The annular shaft 57 can drive the mounting seat 58 and the grinding plate 3 to rotate accordingly, so that the grinding plate 3 rotates to a state parallel to the workbench 1; Then, the bearing table 42 is driven by the second electric telescopic rod 41 to move upward, so that the edge wrapping layer fits on the surface of the grinding plate 3. At this time, the first motor 59 drives the grinding plate 3 to rotate, and the upper surface of the edge wrapping layer is ground; Moreover, at the same time, the driving mechanism drives the grinding plate 3 to move along a rectangular path, that is, to move along the edge wrapping layer, and the upper surface of the edge wrapping layer is ground well; Then, turn the sieve plate over and place it on the bearing table 42, and let the grinding plate 3 grind the other side of the edge wrapping layer.

[0038] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0039] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A portable polyurethane edge - wrapped sieve plate production device, characterized in that: It includes a workbench (1), and an electric telescopic rod one (21) that penetrates through the workbench (1) and is fixedly connected to the workbench (1). A lower mold one (22) is fixedly installed at the upper end of the electric telescopic rod one (21). A lower mold two (23) adapted to the lower mold one (22) is fixed on the upper surface of the workbench (1). A hemming groove (24) is formed between the lower mold one (22) and the lower mold two (23). Above the workbench (1), there are four grinding plates (3) distributed around the lower mold one (22), and a driving mechanism for driving the grinding plates (3) to move along a rectangular path. Four electric telescopic rods two (41) distributed around the lower mold two (23) are vertically fixed on the upper surface of the workbench (1). A bearing platform (42) is fixedly installed at the upper end of the electric telescopic rod two (41). Above the workbench (1), there is a linkage mechanism for driving the grinding plates (3) to rotate and be parallel to the workbench (1).

2. The portable polyurethane edge - wrapped sieve plate production device according to claim 1, characterized in that: The driving mechanism includes an L-shaped plate (51) and a round rod (52) fixed on the upper surface of the workbench (1). A sliding rod one (53) is fixedly connected to the free end of the round rod (52). A sliding sleeve one (54) that is slidably connected to it is sleeved on the sliding rod one (53). A sliding rod two (55) is vertically fixed on the surface of the sliding sleeve one (54). A sliding sleeve two (56) that is slidably connected to it is sleeved on the sliding rod two (55).

3. A portable polyurethane edge - wrapped sieve plate production device according to claim 2, characterized in that: An annular shaft (57) that is rotatably connected to it is sleeved on the sliding sleeve two (56). A mounting seat (58) that is fixedly connected to it is sleeved on the annular shaft (57). A first motor (59) is installed on the mounting seat (58). A grinding plate (3) is installed at the output end of the first motor (59).

4. A portable polyurethane edge-sealed sieve plate production device according to claim 3, characterized in that: A second motor (510) is fixedly installed on the L-shaped plate (51). A sliding sleeve three (511) is installed at the output end of the second motor (510). A sliding rod three (512) that is telescopically connected to it penetrates through the sliding sleeve three (511). A stop block (513) is fixedly connected to one end of the sliding rod three (512).

5. The portable polyurethane edge - wrapped sieve plate production device according to claim 4, wherein: A first spring (514) sleeved on the sliding rod three (512) is fixedly connected between the stop block (513) and the sliding sleeve three (511). The stop block (513) is rotatably connected to the sliding sleeve two (56).

6. The portable polyurethane edge - wrapped sieve plate production device according to claim 3, characterized in that: The linkage mechanism includes a vertical rod (61) fixed on the surface of the sliding sleeve two (56). An annular seat (62) is fixedly connected to the lower end of the vertical rod (61). A hollow shaft (63) is rotatably connected to the inner wall of the annular seat (62). A first gear (64) that is fixedly connected to it is sleeved on the surface of the hollow shaft (63).

7. The portable polyurethane edge - wrapped sieve plate production device according to claim 6, wherein: Two vertical rods (65) are vertically fixed on the upper surface of the workbench (1). The upper ends of the two vertical rods (65) are jointly fixed with the same rack (66). The rack (66) and the first gear (64) are at the same horizontal height.

8. A portable polyurethane edge - wrapped sieve plate production device according to claim 7, characterized in that: A circular shaft (67) perpendicular to the surface of the second sliding sleeve (56) is rotatably connected thereto. A first bevel gear (68) fixedly connected thereto is sleeved on the circular shaft (67). A second bevel gear (69) fixedly connected thereto is sleeved on the annular shaft (57). The second bevel gear (69) meshes with the first bevel gear (68).

9. The portable polyurethane edge - wrapped sieve plate production device according to claim 8, wherein: A ratchet wheel (610) fixedly connected thereto is sleeved on the lower end of the circular shaft (67). A ratchet tooth (611) is rotatably connected to the inner wall of the hollow shaft (63). The ratchet tooth (611) meshes with the ratchet wheel (610). A second spring (612) is fixedly connected to the surface of the ratchet tooth (611). One end of the second spring (612) far from the ratchet tooth (611) is fixedly connected to the inner wall of the hollow shaft (63).

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