Automatic folding jig and folding method

Abstract

The application discloses an automatic edge folding jig and an edge folding method. The automatic edge folding jig comprises a bottom die assembly, a side die assembly and a top die assembly. The bottom die assembly comprises a base for supporting a to-be-packaged piece, a first driving mechanism mounted on the base and a first edge folding part mounted on an output end of the first driving mechanism. The side die assembly comprises a flat plate, at least two side supports fixed on the flat plate, at least two second driving mechanisms respectively mounted on the side supports and at least two second edge folding parts respectively mounted on output ends of the second driving mechanisms. The second driving mechanisms can drive the second edge folding parts to move so as to fold the upper end and the lower end of a mesh cloth to the top and the bottom of the to-be-packaged piece respectively. The top die assembly comprises a connecting seat and a third edge folding part protruding from the connecting seat. The third edge folding part can move to fold the mesh cloth on the top of the to-be-packaged piece. The first driving mechanism can drive the first edge folding part to move to fold the mesh cloth on the bottom of the to-be-packaged piece.

Description

Technical Field

[0001] This invention relates to the field of packaging equipment structure technology, and in particular to an automatic folding fixture and folding method. Background Technology

[0002] Currently, for products with a square structure, such as square speakers, the grille frame needs to be wrapped with a layer of mesh fabric after production. This covers the four sides, top, and bottom of the grille frame to prevent it from being damaged by bumps and knocks, and also to make the grille frame look more high-end.

[0003] When wrapping the mesh fabric, it is usually done manually. The top and bottom of the mesh frame have cavities and grooves, and the mesh fabric is manually folded along the edge of the mesh frame. Alternatively, two sets of fixtures can be used. In this case, the mesh fabric can be pre-attached to the outer walls of the mesh frame, with the top and bottom ends of the mesh fabric protruding outside the mesh frame. One set of fixtures can first fold the top and bottom ends of the mesh fabric on the mesh frame, folding the top and bottom ends of the mesh fabric to the top and bottom of the mesh frame respectively. Then, the other set of fixtures completes the inward sealing and pressure holding of the top and bottom mesh fabric of the mesh frame, which is completed in two steps.

[0004] However, the production efficiency of the two methods mentioned above is still very low, and the quality of the product after the mesh is wrapped around the frame is unstable. Summary of the Invention

[0005] This invention provides an automatic folding fixture and folding method, aiming to solve the technical problem that in order to wrap a layer of mesh fabric on the outside of the mesh frame, it is generally possible to manually wrap and fold the fabric, or to use two sets of fixtures to fold the fabric on the mesh frame in two separate processes. Both of these methods still have very low production efficiency and the product quality is unstable after the fabric is wrapped around the mesh frame.

[0006] This invention is implemented as follows:

[0007] This invention provides an automatic folding fixture for folding the edges of a mesh fabric adhered to the outside of a packaged item. The mesh fabric is adhered to the outer wall of the packaged item, with both its upper and lower ends protruding beyond the packaged item. The automatic folding fixture includes:

[0008] The bottom mold assembly includes a base for supporting the packaged item, a first drive mechanism mounted on the base, and a first folded edge mounted on the output end of the first drive mechanism.

[0009] The side mold assembly includes a flat plate, at least two side brackets fixed on the flat plate, at least two second drive mechanisms respectively mounted on each of the side brackets, and at least two second folding portions respectively mounted on the output end of each of the second drive mechanisms. Each second folding portion is arranged around the outer periphery of the base. The second drive mechanism can drive the second folding portion to reciprocate in the horizontal direction to fold the upper end of the mesh fabric to the top of the item to be packaged and fold the lower end of the mesh fabric to the bottom of the item to be packaged.

[0010] The top mold assembly includes a connecting seat and a third folded edge portion protruding from the connecting seat. The third folded edge portion is disposed opposite to the base. The third folded edge portion can reciprocate in the vertical direction to fold the mesh fabric at the top of the item to be packaged. The first driving mechanism can drive the first folded edge portion to reciprocate in the vertical direction to fold the mesh fabric at the bottom of the item to be packaged.

[0011] Furthermore, the flat plate has a through hole running vertically through it, and the bottom mold assembly passes through the through hole.

[0012] Furthermore, the bottom of the packaged item is provided with a groove, and the base includes a base plate, a plurality of first guide rods and a support seat for inserting into the groove. One end of the first guide rod is fixed to the base plate and the other end is connected to the bottom of the support seat.

[0013] The first driving mechanism is mounted on the base plate, and the first folded edge is slidably mounted on the first guide rod and located between the base plate and the support seat. The first driving mechanism can drive the first folded edge to squeeze and fold the mesh fabric toward the inside of the groove.

[0014] Furthermore, the first folding portion includes a first support plate mounted on the output end of the first drive mechanism and a first annular pressure plate for squeezing and folding the mesh fabric into the groove. The first support plate is slidably mounted on the first guide rod, and the first annular pressure plate protrudes from the side of the first support plate away from the bottom plate.

[0015] Furthermore, the item to be packaged has a square structure, and there are four of each of the side bracket, the second driving mechanism, and the second folded edge. The four second folded edges are arranged around the outer periphery of the support base and are respectively arranged corresponding to the four corners of the item to be packaged.

[0016] Furthermore, the second folding portion includes a second support plate mounted on the output end of the second drive mechanism, two opposing side support plates, and two V-shaped pressure plates for bending and folding the upper and lower ends of the mesh fabric, respectively. The side support plates are mounted on the second support plate, and the side of the side support plate away from the second support plate is provided with a V-shaped groove that matches the side edge of the item to be packaged. The V-shaped pressure plate protrudes from the inner wall of the V-shaped groove.

[0017] Furthermore, the side mold assembly also includes a plurality of second guide rods, one end of which is slidably mounted on the side bracket and the other end is fixed to the second folded edge.

[0018] Furthermore, the top of the item to be packaged is provided with a recess, and the third folded edge includes a third support plate installed on the connecting seat and a second annular pressure plate for squeezing and folding the mesh fabric into the recess. The second annular pressure plate protrudes from the third support plate on the side away from the connecting seat.

[0019] The present invention also provides a folding method, employing the automatic folding fixture as described above, the folding method comprising:

[0020] Step S1: Install the bottom mold assembly and the side mold assembly on the platform at the bottom of the external machine, and install the top mold assembly on the output end of the telescopic mechanism at the top of the external machine. The first drive mechanism, the second drive mechanism, and the telescopic mechanism are all in the retracted state.

[0021] Step S2: Install the packaged item with the mesh fabric attached onto the base;

[0022] Step S3: Activate the second driving mechanism, which drives the second folding part to move horizontally to bend and fold the upper and lower ends of the mesh fabric on the item to be packaged; activate the telescopic mechanism, which drives the third folding part to move vertically to fold the mesh fabric at the top of the item to be packaged; activate the first driving mechanism, which drives the first folding part to move vertically to fold the mesh fabric at the bottom of the item to be packaged.

[0023] Step S4: After the folding is completed, the first driving mechanism, the second driving mechanism and the telescopic mechanism are reset, and the packaged item wrapped with the mesh fabric is taken out.

[0024] Further, in step S3, the telescopic mechanism drives the third folding portion to move vertically to squeeze and fold the mesh fabric at the top of the packaged item into the cavity at the top of the packaged item; the first driving mechanism drives the first folding portion to move vertically to squeeze and fold the mesh fabric at the bottom of the packaged item into the groove at the bottom of the packaged item.

[0025] Compared with the prior art, the beneficial effects of the present invention include at least the following:

[0026] In the automatic folding fixture of the present invention, the packaged item can be placed on a base. At this time, the packaged item is covered with a mesh fabric. The second driving mechanism is activated, which drives the second folding part to move horizontally to fold the upper and lower ends of the mesh fabric on the packaged item. The first driving mechanism is activated, which drives the first folding part to move vertically to fold the bottom of the mesh fabric on the packaged item. The telescopic mechanism is activated, which drives the third folding part to move vertically to fold the top of the mesh fabric on the packaged item. Compared with the previous manual packaging and the use of two sets of fixtures, the cost of one set of fixtures can be saved, the production cost is reduced, the production efficiency is improved, and the quality of the packaged product is more stable. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a packaged item with a mesh fabric attached, placed inside an open automatic folding fixture, according to an embodiment of the present invention.

[0028] Figure 2 for Figure 1 explosion Figure 1 ;

[0029] Figure 3 for Figure 1 explosion Figure 2 ;

[0030] Figure 4 This is a schematic diagram of the structure of a packaged item with a mesh fabric pasted on it, provided in an embodiment of the present invention. Figure 1 ;

[0031] Figure 5 This is a schematic diagram of the structure of a packaged item with a mesh fabric pasted on it, provided in an embodiment of the present invention. Figure 2 ;

[0032] Figure 6 An exploded view of a packaged item with a mesh fabric pasted on it, provided in an embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram of the structure of the automatic folding fixture provided in this embodiment of the invention after folding the edge of the packaged item with the mesh fabric attached.

[0034] Figure 8 for Figure 7 Sectional view along line AA;

[0035] Figure 9 for Figure 8 A magnified view of a portion of point B in the middle;

[0036] Figure 10 for Figure 8 A magnified view of a portion of point C in the middle;

[0037] Figure 11 This is a schematic diagram of the structure of the bottom mold assembly provided in an embodiment of the present invention;

[0038] Figure 12 for Figure 11 Exploded view;

[0039] Figure 13 This is a schematic diagram of the structure of the side mold assembly provided in an embodiment of the present invention;

[0040] Figure 14 This is a schematic diagram of the structure after the second folded edge and the second guide rod are combined, as provided in an embodiment of the present invention.

[0041] Figure 15 This is a schematic diagram of the top mold assembly provided in an embodiment of the present invention.

[0042] In the picture:

[0043] 10. Item to be packaged; 11. Cavity; 12. Groove; 13. Protrusion; 20. Mesh fabric; 30. Bottom mold assembly; 31. Base; 311. First guide rod; 312. Base plate; 313. Support seat; 3131. Positioning groove; 32. First drive mechanism; 33. First folded edge; 331. First pallet; 3311. First guide hole; 332. First annular pressure plate; 40. Side mold assembly; 41. Flat plate; 411. Through hole; 42. Side bracket; 43. Second drive mechanism; 44. Second folded edge; 441. Second pallet; 442. Side support plate; 4421. V-groove; 443. V-shaped pressure plate; 45. Second guide rod; 50. Top mold assembly; 51. Connecting seat; 52. Third folded edge; 521. Third pallet; 522. Second annular pressure plate. Detailed Implementation

[0044] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0045] Please see Figures 1 to 10As shown, this embodiment of the invention discloses an automatic folding fixture for folding the mesh fabric 20 pasted on the outside of the packaged item 10. The packaged item 10 can be a square mesh frame component in a speaker. The top of the packaged item 10 has a cavity 11, and the bottom of the packaged item 10 has a groove 12. In the initial state, the mesh fabric 20 is pasted on the four outer side walls of the packaged item 10, and the upper and lower ends of the mesh fabric 20 protrude outside the packaged item 10. The automatic folding fixture of this embodiment needs to be installed on an external machine for use. Using this folding fixture can save the cost of a set of fixtures and speed up production efficiency. The folding fixture folds the fabric first and then holds the pressure, which is done in one go, and can also make the quality of the product more stable after wrapping the fabric.

[0046] In this embodiment, the automatic folding fixture includes a bottom mold assembly 30, a side mold assembly 40, and a top mold assembly 50. The bottom mold assembly 30 includes a base 31 for supporting the packaged item 10, a first drive mechanism 32 mounted on the base 31, and a first folding part 33 mounted on the output end of the first drive mechanism 32. At this time, the base 31 is partially inserted into the groove 12 of the packaged item 10. A mesh fabric 20 is adhered to the outer wall of the packaged item 10, and the upper and lower ends of the mesh fabric 20 protrude from the packaged item 10.

[0047] The side mold assembly 40 includes a flat plate 41 for mounting on the bottom platform of an external machine, at least two side brackets 42 fixed on the flat plate 41, at least two second drive mechanisms 43 respectively mounted on each side bracket 42, and at least two second folding portions 44 respectively mounted on the output end of each second drive mechanism 43. Each second folding portion 44 is arranged around the outer periphery of the base 31. The second drive mechanism 43 can drive the second folding portion 44 to reciprocate in the horizontal direction to simultaneously bend and fold the upper and lower ends of the mesh fabric 20, that is, fold the upper end of the mesh fabric 20 to the top of the package 10 and fold the lower end of the mesh fabric 20 to the bottom of the package 10.

[0048] The top mold assembly 50 includes a connecting seat 51 for mounting on the output end of a telescopic mechanism on the top of an external machine and a third folded edge portion 52 protruding from the connecting seat 51. The third folded edge portion 52 is disposed opposite to the base 31. The telescopic mechanism can drive the third folded edge portion 52 to reciprocate in the vertical direction to squeeze and fold the mesh fabric 20 at the top of the packaged item 10 toward the inner side of the cavity 11 and maintain pressure. At the same time, the first drive mechanism 32 can drive the first folded edge portion 33 to reciprocate in the vertical direction to squeeze and fold the mesh fabric 20 at the bottom of the packaged item 10 toward the inner side of the groove 12 and maintain pressure, thereby wrapping the mesh fabric 20 onto the outer wall of the packaged item 10. One set of fixtures is used instead of the traditional two sets of fixtures, which reduces production costs and improves production efficiency. The first drive mechanism 32, the second drive mechanism 43 and the telescopic mechanism can all be cylinders.

[0049] It should be noted that in this embodiment, the square mesh frame is installed on the support base 313 in reverse during packaging. That is, the bottom of the square mesh frame is the side closer to the third folding edge 52, and the top of the square mesh frame is the side closer to the first driving mechanism 32. Therefore, it can also be considered that when the packaged item 10 is a mesh frame, the first driving mechanism 32 can drive the first folding edge 33 to squeeze and fold the mesh fabric 20 at the top of the mesh frame, and the telescopic mechanism can drive the third folding edge 52 to squeeze and fold the mesh fabric 20 at the bottom of the mesh frame.

[0050] In some embodiments, a through hole 411 is vertically provided in the middle of the plate 41, and the bottom mold assembly 30 passes through the through hole 411. Each second folded edge portion 44 is arranged around the outer periphery of the bottom mold assembly 30. Initially, the first driving mechanism 32, the second driving mechanism 43 and the telescopic mechanism are all in a retracted state so that the packaged item 10 can be fixed to the bottom mold assembly 30 in the middle by hand.

[0051] Please refer to further information. Figures 3 to 12 The base 31 includes multiple first guide rods 311, a base plate 312 for mounting on the bottom platform of an external machine, and a support seat 313 for inserting into the groove 12. The support seat 313 is located above the base plate 312 and is spaced apart from the base plate 312. There are four first guide rods 311, which are vertically arranged. One end of the first guide rod 311 is fixed to the base plate 312, and the other end is connected to the bottom of the support seat 313. The support seat 313 and the base plate 312 are located on the upper and lower sides of the flat plate 41, respectively.

[0052] The first drive mechanism 32 is mounted on the base plate 312, and the first folded edge portion 33 is slidably mounted on the first guide rod 311 and located between the base plate 312 and the support seat 313. The inner wall of the groove 12 is spaced apart from the support seat 313 at least on the side near the groove opening, so that the first drive mechanism 32 can drive the first folded edge portion 33 to squeeze and fold the mesh fabric 20 toward the inside of the groove 12.

[0053] The first folding section 33 includes a first support plate 331 mounted on the output end of the first drive mechanism 32 and a first annular pressure plate 332 for pressing and folding the mesh fabric 20 into the groove 12. The first support plate 331 is slidably mounted on the first guide rod 311. Specifically, the first support plate 331 is provided with a plurality of first guide holes 3311. The first guide rod 311 is slidably mounted in the first guide holes 3311. The first annular pressure plate 332 protrudes from the side of the first support plate 331 away from the bottom plate 312. The outer diameter of the first annular pressure plate 332 is smaller than the inner diameter of the groove 12. When the lower end of the mesh fabric 20 of the packaged item 10 is bent to the bottom of the packaged item 10, the first annular pressure plate 332 extends directly into the groove 12. Under the action of the first drive mechanism 32, the first annular pressure plate 332 presses and folds the mesh fabric 20 toward the side of the groove 12.

[0054] In some embodiments, the outer diameter of the first annular pressure plate 332 is smaller than the outer diameter of the first support plate 331. When the first annular pressure plate 332 is inserted into the groove 12, the first support plate 331 can abut against the bottom of the second folded edge portion 44 to limit the first folded edge portion 33.

[0055] In some embodiments, the top of the base 31 is recessed with at least one positioning groove 3131 for engaging with a protrusion 13 in the groove 12 of the package 10, so as to prevent the package 10 from moving left or right during the folding process.

[0056] Please refer to further information. Figures 3 to 10 ,as well as Figures 13 to 15 In this embodiment, the packaged item 10 has a square structure. There are four side supports 42, four second drive mechanisms 43, and four second folding edges 44. The four second folding edges 44 are arranged around the outer periphery of the support base 313 and are respectively arranged to correspond to the four corners of the packaged item 10, so that the upper and lower ends of the mesh fabric 20 can be bent and folded at the same time.

[0057] The second folding section 44 includes a second support plate 441 mounted on the output end of the second drive mechanism 43, two opposing side support plates 442, and two V-shaped pressure plates 443 for bending and folding the upper and lower ends of the mesh fabric 20, respectively. The side support plates 442 are mounted on the second support plate 441. The side of the side support plate 442 away from the second support plate 441 is provided with a V-shaped groove 4421 that matches the side of the package 10. The V-shaped pressure plates 443 protrude from the inner wall of the V-shaped groove 4421. The V-shaped groove 4421 will abut against two adjacent sides of the package 10. The two V-shaped pressure plates 443 will act on the upper and lower ends of the mesh fabric 20, respectively, folding the upper end of the mesh fabric 20 to the top of the package 10 and folding the lower end of the mesh fabric 20 to the bottom of the package 10.

[0058] In some embodiments, the side mold assembly 40 further includes a plurality of second guide rods 45, and the side bracket 42 is provided with a plurality of second guide holes. One end of the second guide rod 45 is slidably mounted on the second guide hole of the side bracket 42, and the other end is fixed on the second folded edge portion 44. The second guide rod 45 is slidably connected to the side bracket 42 to play a certain supporting and guiding role.

[0059] In this embodiment, the third folding portion 52 includes a third support plate 521 mounted on the connecting seat 51 and a second annular pressure plate 522 for pressing and folding the mesh fabric 20 into the cavity 11. The second annular pressure plate 522 protrudes from the third support plate 521 on the side away from the connecting seat 51. The outer diameter of the second annular pressure plate 522 is smaller than the inner diameter of the cavity 11. When the upper end of the mesh fabric 20 of the package to be packaged is folded to the top of the package to be packaged, the second annular pressure plate 522 extends directly into the cavity 11. Under the action of the telescopic mechanism, the second annular pressure plate 522 presses and folds the mesh fabric 20 toward the side of the cavity 11.

[0060] In some embodiments, the outer diameter of the second annular pressure plate 522 is smaller than the outer diameter of the third support plate 521. When the second annular pressure plate 522 is inserted into the cavity 11, the third support plate 521 can abut against the top of the second folded edge portion 44 to limit the third folded edge portion 52.

[0061] Please continue reading. Figures 1 to 10 The present invention also discloses a folding method, which uses the automatic folding fixture as described above. The folding method includes the following steps:

[0062] Step S1: Install the bottom mold assembly 30 and the side mold assembly 40 on the platform at the bottom of the external machine, and install the top mold assembly 50 on the output end of the telescopic mechanism at the top of the external machine. The first drive mechanism 32, the second drive mechanism 43 and the telescopic mechanism are all in the retracted state to achieve the fixed installation of the automatic folding fixture.

[0063] Step S2: Use a human hand or a robotic arm to install the packaged item 10 with the mesh fabric 20 attached onto the base 31. At this time, the mesh fabric 20 is attached to the four outer side walls of the packaged item 10, and the upper and lower ends of the mesh fabric 20 protrude from the packaged item 10.

[0064] Step S3: Activate the second drive mechanism 43, which drives the second folding part 44 to move horizontally to bend and fold the upper and lower ends of the mesh fabric 20 of the package 10. At this time, the upper end of the mesh fabric 20 is folded to the top of the package 10, and the lower end of the mesh fabric 20 is folded to the bottom of the package 10. Then, activate the telescopic mechanism, which drives the third folding part 52 to move vertically to fold the top of the mesh fabric 20 of the package 10. At the same time, activate the first drive mechanism 32, which drives the first folding part 33 to move vertically to fold the bottom of the mesh fabric 20 of the package 10.

[0065] Step S4: After the folding is completed, the first drive mechanism 32, the second drive mechanism 43 and the telescopic mechanism are reset, and the packaged item 10 wrapped with the mesh fabric 20 can be taken out.

[0066] In some embodiments, in step S3 above, the telescopic mechanism drives the third folding portion 52 to move vertically to press and fold the mesh fabric 20 at the top of the package 10 into the cavity 11 at the top of the package 10, thus pressing and folding the mesh fabric 20 at the top of the package 10. The first driving mechanism 32 drives the first folding portion 33 to move vertically to press and fold the mesh fabric 20 at the bottom of the package 10 into the groove 12 at the bottom of the package 10, thus pressing and folding the mesh fabric 20 at the bottom of the package 10. This results in faster production efficiency and more stable quality.

[0067] Installation method of the folding fixture:

[0068] First, install both the side mold assembly 40 and the bottom mold assembly 30 onto the platform at the bottom of the machine and secure them with screws. Place the packaged item 10 onto the support base 313 in the bottom mold assembly 30 for positioning. Then, place the top mold assembly 50 on the packaged item 10. Start the machine to lower the telescopic mechanism at the top of the machine to the position of the top mold assembly 50 and secure it with screws. Start the machine again to allow the telescopic mechanism at the top of the machine to bring the top mold assembly 50 back to the top, thus completing the installation of the folding fixture.

[0069] Working principle of folding jig:

[0070] First, the packaged item 10 with the mesh fabric 20 attached is fixed to the support base 313 in the bottom mold assembly 30 and the machine is started. At this time, the mesh fabric 20 is attached to the four outer side walls of the packaged item 10, and the upper and lower ends of the mesh fabric 20 protrude from the packaged item 10. The four second drive mechanisms 43 on the side mold assembly 40 push the four second folding parts 44 to move in the horizontal direction to bend and fold the upper and lower ends of the mesh fabric 20, that is, fold the upper end of the mesh fabric 20 to the top of the packaged item 10 and fold the lower end of the mesh fabric 20 to the bottom of the packaged item 10. Then, the first drive mechanism 32 on the bottom mold assembly 30 pushes the first folding part 33 upward while the telescopic mechanism at the top of the machine drives the top mold assembly 50 downward. The first folding part 33 and the third folding part 52 push the mesh fabric 20 at the corresponding positions to complete the folding and sealing of the mesh fabric 20 of the packaged item 10.

[0071] In summary, the automatic folding fixture of the present invention allows the packaged item 10 to be placed on the base 31, with a mesh fabric 20 adhered to the outside of the packaged item 10. Activating the second drive mechanism 43 drives the second folding part 44 to move horizontally, simultaneously folding the upper and lower ends of the mesh fabric 20 on the packaged item 10. Activating the first drive mechanism 32 drives the first folding part 33 to move vertically, folding the bottom of the mesh fabric 20 on the packaged item 10. Activating the telescopic mechanism drives the third folding part 52 to move vertically, folding the top of the mesh fabric 20 on the packaged item 10. Compared to manual packaging and the use of two sets of fixtures, this method saves the cost of one set of fixtures, reduces production costs, improves production efficiency, and ensures more consistent product quality after packaging.

[0072] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. An automatic folding fixture for folding the edges of mesh fabric to be pasted onto the outside of a package, wherein, The mesh fabric is adhered to the outer side wall of the item to be packaged, with both the upper and lower ends of the mesh fabric protruding from the item. The automatic folding fixture comprises: The bottom mold assembly includes a base for supporting the packaged item, a first drive mechanism mounted on the base, and a first folded edge mounted on the output end of the first drive mechanism. The side mold assembly includes a flat plate, at least two side brackets fixed on the flat plate, at least two second drive mechanisms respectively mounted on each of the side brackets, and at least two second folding portions respectively mounted on the output end of each of the second drive mechanisms. Each second folding portion is arranged around the outer periphery of the base. The second drive mechanism can drive the second folding portion to reciprocate in the horizontal direction to fold the upper end of the mesh fabric to the top of the item to be packaged and fold the lower end of the mesh fabric to the bottom of the item to be packaged. The top mold assembly includes a connecting seat and a third folded edge portion protruding from the connecting seat. The third folded edge portion is disposed opposite to the base. The third folded edge portion can reciprocate in the vertical direction to fold the mesh fabric at the top of the item to be packaged. The first driving mechanism can drive the first folded edge portion to reciprocate in the vertical direction to fold the mesh fabric at the bottom of the item to be packaged. The bottom of the packaged item is provided with a groove. The base includes a base plate, a plurality of first guide rods and a support seat for inserting into the groove. One end of the first guide rod is fixed to the base plate and the other end is connected to the bottom of the support seat. The first driving mechanism is mounted on the base plate, and the first folded edge is slidably mounted on the first guide rod and located between the base plate and the support seat. The first driving mechanism can drive the first folded edge to squeeze and fold the mesh fabric toward the inside of the groove.

2. The automatic hemming fixture according to claim 1, characterized in that, The flat plate has a through hole running vertically through it, and the bottom mold assembly passes through the through hole.

3. The automatic hemming fixture according to claim 1, characterized in that, The first folding portion includes a first support plate mounted on the output end of the first drive mechanism and a first annular pressure plate for squeezing and folding the mesh fabric into the groove. The first support plate is slidably mounted on the first guide rod, and the first annular pressure plate protrudes from the side of the first support plate away from the bottom plate.

4. The automatic hemming fixture according to claim 1, characterized in that, The item to be packaged has a square structure. There are four side supports, four second drive mechanisms, and four second folded edges. The four second folded edges are arranged around the outer periphery of the support base and correspond to the four corners of the item to be packaged.

5. The automatic hemming fixture according to claim 1, characterized in that, The second folding section includes a second support plate mounted on the output end of the second drive mechanism, two opposing side support plates, and two V-shaped pressure plates for bending and folding the upper and lower ends of the mesh fabric, respectively. The side support plates are mounted on the second support plate, and the side of the side support plate away from the second support plate is provided with a V-shaped groove that matches the side of the item to be packaged. The V-shaped pressure plate protrudes from the inner wall of the V-shaped groove.

6. The automatic hemming fixture according to claim 1, characterized in that, The side mold assembly also includes a plurality of second guide rods, one end of which is slidably mounted on the side bracket and the other end is fixed to the second folded edge.

7. The automatic hemming fixture according to claim 1, characterized in that, The top of the packaged item is provided with a recessed cavity. The third folded edge portion includes a third support plate mounted on the connecting seat and a second annular pressure plate for squeezing and folding the mesh fabric into the recessed cavity. The second annular pressure plate protrudes from the third support plate on the side away from the connecting seat.

8. A folding method, employing the automatic folding fixture as described in claim 1, characterized in that, The folding method includes: Step S1: Install the bottom mold assembly and the side mold assembly on the platform at the bottom of the external machine, and install the top mold assembly on the output end of the telescopic mechanism at the top of the external machine. The first drive mechanism, the second drive mechanism, and the telescopic mechanism are all in the retracted state. Step S2: Install the packaged item with the mesh fabric attached onto the base; Step S3: Activate the second driving mechanism, which drives the second folding part to move horizontally to bend and fold the upper and lower ends of the mesh fabric on the item to be packaged; activate the telescopic mechanism, which drives the third folding part to move vertically to fold the mesh fabric at the top of the item to be packaged; activate the first driving mechanism, which drives the first folding part to move vertically to fold the mesh fabric at the bottom of the item to be packaged. Step S4: After the folding is completed, the first driving mechanism, the second driving mechanism and the telescopic mechanism are reset, and the packaged item wrapped with the mesh fabric is taken out.

9. The folding method according to claim 8, characterized in that, In step S3, the telescopic mechanism drives the third folding part to move vertically to squeeze and fold the mesh fabric at the top of the packaged item into the cavity at the top of the packaged item; the first driving mechanism drives the first folding part to move vertically to squeeze and fold the mesh fabric at the bottom of the packaged item into the groove at the bottom of the packaged item.

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