Method for processing middle frame of folding machine

Abstract

The invention relates to the technical field of metal processing, and discloses a method for processing a middle frame of a folding machine, which comprises the following steps of: A1, providing a plate; a2, a third forming area and a fourth forming area are machined on the third machining area and the fourth machining area correspondingly, and a lower injection molding groove is formed in the third forming area; a3, injecting plastic liquid into each lower injection molding groove to form a lower plastic structure; a4, a lower back plate, a lower rotating shaft groove and a lower inner side face are machined, and the material connecting area is disconnected to form two second forming blanks; and A5, processing a lower side plate and each lower hole structure to form a lower middle frame. The third machining area and the fourth machining area are symmetrically formed, so that the two lower middle frames can be formed after machining is completed, and the machining efficiency is improved to a certain degree; the third forming area and the fourth forming area are machined gradually through sequential grooving, machining of the lower middle frame is completed in a thinning mode, and machining is reasonable and orderly completed.

Description

Technical Field

[0001] The invention relates to the technical field of metal processing, and in particular to a method for processing a middle frame of a folding machine. Background Art

[0002] The middle frame of foldable electronic products is an important part of foldable screen electronic products. It supports the screen and internal structure of foldable mobile phones, and affects the appearance design and durability of mobile phones. Foldable electronic products are used to support the screen and internal structure, which can effectively protect the screen from external impact and scratches. The final condition after careful polishing and design can enhance the appearance of the mobile phone and make users more comfortable during use. In order to ensure the high strength of the middle frame and meet the durability of foldable screen electronic products, it is usually made of metal.

[0003] The middle frame includes an upper middle frame and a lower middle frame, which are connected by a rotating shaft so that they can be folded. When the middle frame is in use, internal parts such as batteries need to be installed inside. Therefore, the inner side structure of the middle frame is complex and changeable. How to process the middle frame structure in an orderly manner becomes the key. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a method for processing a middle frame of a folding machine to solve the problem that the middle frame is difficult to process.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is: providing a folding machine middle frame processing method including processing a lower middle frame, and the processing of the lower middle frame includes the following steps:

[0006] A1. Provide a plate, wherein the plate comprises a material connection region and a third processing region and a fourth processing region symmetrically distributed on opposite sides of the material connection region along the length direction of the plate, wherein the third processing region and the fourth processing region both comprise a third side surface and a fourth side surface relatively distributed along the thickness direction of the plate;

[0007] A2. A third molding area adapted to one side of the lower back plate of the lower middle frame is processed on the third side surface of the third processing area and the fourth processing area, and a fourth molding area adapted to the lower inner side surface of the lower middle frame is processed on the fourth side surface, and a lower injection molding groove penetrating the fourth molding area is opened on the third molding area along the thickness direction of the plate;

[0008] A3. Injecting plastic liquid into each lower injection molding tank to form a lower plastic structure;

[0009] A4, processing a lower back plate and a lower shaft groove on the third molding area and the lower plastic structure, processing a lower inner side surface on the third molding area and the lower plastic structure, and then disconnecting the connecting area to form two second molding blanks;

[0010] A5. Process the lower side plate and lower hole structures on the second molded blank to form a lower middle frame.

[0011] Furthermore, the step A2 includes the following sub-steps:

[0012] A21. A seventh processing groove adapted to the lower back plate and recessed relative to the third side surface is processed on the third processing area and the third side surface of the fourth processing area. The two seventh processing grooves penetrate the connecting area in the length direction of the plate to form a third molding area.

[0013] A22, a lower injection molding groove is machined on the groove edge of the seventh processing groove and penetrates the fourth molding area along the thickness direction of the plate, and the lower injection molding groove includes a third injection molding part machined on one side of the seventh processing groove away from the material connection area and two fourth injection molding parts respectively machined on two side edges of the seventh processing groove that are oppositely distributed along the width direction of the plate;

[0014] A23. An eighth processing groove matching the lower inner side surface is processed along the thickness direction at the position of the fourth side surface of the third processing area and the fourth processing area corresponding to the seventh processing groove, and a ninth processing groove is processed along the thickness direction from the eighth processing groove to be recessed in the eighth processing groove, a second convex portion is formed in the eighth processing groove and outside the ninth processing groove, and the lower plastic structure passes through the second convex portion, thereby forming a fourth molding area.

[0015] Furthermore, in step A22: thinning is performed along the thickness direction of the plate on one side of the two seventh processing grooves close to the connecting material area and on the connecting material area to form a stepped lower step groove on one side of the two seventh processing grooves close to the connecting material area.

[0016] Furthermore, the A4 step includes the following sub-steps:

[0017] A41, processing a rough blank of a rotating shaft groove on the lower step groove suitable for the rotating shaft of the folding machine;

[0018] A42, on the third side surface and outside the notch of the seventh processing groove, the lower side plate corresponding to the lower middle frame is thinned along the thickness direction of the third side surface and the lower plastic structure in the seventh processing groove, so as to process a first lower side edge surrounded outside the notch of the seventh processing groove and a second panel surface located inside the first lower side edge and adapted to the lower back panel, the lower plastic structure is a part of the second panel surface and is distributed around the first lower side edge, and a part of the lower plastic structure is located on the first lower side edge;

[0019] A43, on the fourth side surface and outside the notch of the eighth processing groove, the lower side plate corresponding to the lower middle frame is thinned along the thickness direction of the fourth side surface and the lower plastic structure in the eighth processing groove, so as to process a second lower side edge surrounded outside the notch of the eighth processing groove, the first lower side edge corresponds to the second lower side edge in the thickness direction of the plate, and part of the lower plastic structure is located on the second lower side edge;

[0020] A44. A tenth processing groove and an eleventh processing groove are processed on the second convex portion and the lower plastic structure along the thickness direction of the plate, and are recessed in the eighth processing groove. The tenth processing groove and the eleventh processing groove are distributed on both sides of the ninth processing groove along the length direction of the plate. The tenth processing groove is processed corresponding to the lower inner side surface of the lower middle frame to form a second inner groove surface and a plurality of second through holes penetrating the second plate surface along the thickness direction of the plate, so as to form a lower inner side surface of the lower middle frame;

[0021] A45. The connecting area is cut on both sides along the length direction of the plate to form two second blanks.

[0022] Furthermore, the step A5 includes the following sub-steps:

[0023] A51, processing a lower side plate around the first lower side edge and the second lower side edge in the thickness direction;

[0024] A52. Process a lower functional hole on the lower side corresponding to the tenth processing groove.

[0025] The folding machine middle frame processing method of the present invention further includes processing the upper middle frame, and the processing of the upper middle frame includes the following steps:

[0026] S1. Provide a plate, wherein the plate comprises a material connection region and a first processing region and a second processing region symmetrically distributed on opposite sides of the material connection region along the length direction of the plate, wherein the first processing region and the second processing region both comprise a first side surface and a second side surface that are oppositely distributed along the thickness direction of the plate;

[0027] S2, a first molding area adapted to one side of the upper back plate of the upper middle frame is processed on the first side of the first processing area and the second processing area, and a second molding area adapted to the upper inner side of the upper middle frame is processed on the second side, and an upper injection molding groove penetrating the second molding area is opened on the first molding area along the thickness direction of the plate;

[0028] S3, injecting plastic liquid into each upper injection molding groove to form an upper plastic structure;

[0029] S4, processing an upper back plate and an upper shaft groove on the first molding area and the plastic structure, processing an upper inner side surface on the second molding area and the upper plastic structure, and then disconnecting the connecting area to form two first molding blanks;

[0030] S5, processing the upper side plate and each upper hole structure on the first molded blank to form an upper middle frame.

[0031] Furthermore, the step S2 includes the following sub-steps:

[0032] S21, processing first processing grooves adapted to the upper back plate of the upper middle frame and recessed relative to the first side surface on the first processing area and the second processing area, wherein the two first processing grooves penetrate the connecting area in the length direction of the plate toward each other to form a first molding area;

[0033] S22, processing an upper injection molding groove on the groove edge of the first processing groove and penetrating the second molding area along the thickness direction of the plate, the upper injection molding groove comprising a first injection molding portion processed on a side of the first processing groove away from the material connection area and two second injection molding portions respectively processed on two side edges of the first processing groove oppositely distributed along the width direction of the plate;

[0034] S23. A second processing groove adapted to the upper inner side surface is processed along the thickness direction at the position corresponding to the first processing groove on the second side surfaces of the first processing area and the second processing area, a third processing groove is processed along the thickness direction from the second processing groove to be recessed in the second processing groove, and a fourth processing groove is opened on the second processing groove and is located outside the third processing groove close to the material connecting area along the thickness direction of the plate. A first convex portion adapted to the upper inner side surface is processed on the side of the third processing groove close to the first processing groove, and a first partition is formed on the second processing groove between the third processing groove and the fourth processing groove to separate the second molding area, the first injection molding part penetrates the third processing groove, and a part of the second injection molding part penetrates the third processing groove and the other part penetrates the second processing groove located outside the two sides of the third processing groove that are relatively distributed along the width direction of the plate.

[0035] Furthermore, in the step S22: one side of the two first processing grooves close to the connecting area and the connecting area are processed along the thickness direction of the plate, the connecting area is thinned, and a stepped upper step groove is formed on one side of the two first processing grooves close to the connecting area.

[0036] Furthermore, the S4 step includes the following sub-steps:

[0037] S41, processing a rough upper shaft groove on the upper step groove adapted to the shaft of the folding machine;

[0038] S42, thinning the upper plastic structure on the first side surface and outside the notch of the first processing groove and in the first processing groove along the thickness direction of the upper side plate corresponding to the upper middle frame, so as to process a first upper side edge arranged outside the notch of the first processing groove and a first board surface located inside the first upper side edge and adapted to the upper back plate, wherein the upper plastic structure is a part of the first board surface and is distributed around the first upper side edge, and a part of the upper plastic structure is located on the first upper side edge;

[0039] S43, thinning the second side surface and the upper plastic structure in the second processing groove along the thickness direction of the upper side plate corresponding to the upper middle frame on the second side surface and outside the notch of the second processing groove, so as to process a second upper side edge surrounded outside the notch of the second processing groove, wherein the first upper side edge corresponds to the second upper side edge in the thickness direction of the plate, and part of the upper plastic structure is located on the second upper side edge;

[0040] S44, a fifth processing groove is processed on one side of the second processing groove close to the material connection area, and a sixth processing groove is processed on both sides of the second processing groove outside the fourth processing groove in the width direction of the plate, a first convex portion protruding in the thickness direction of the plate is processed on the third processing groove, and a first inner groove surface and a plurality of first through holes penetrating the first plate surface in the thickness direction of the plate are processed on the first convex portion corresponding to the upper inner side surface, so as to form an upper inner side surface of the upper middle frame;

[0041] S45, cutting the connecting area on both sides along the length direction of the plate to form two first forming blanks.

[0042] Furthermore, the step S5 includes the following sub-steps:

[0043] S51, processing an upper side plate around the first upper side edge and the second upper side edge along the thickness direction, and forming an upper partition strip on the upper back plate with an upper plastic structure;

[0044] S52, processing upper functional holes on the upper side corresponding to the first processing groove, the second processing groove, the third processing groove and the sixth processing groove respectively;

[0045] S53, performing a hole drilling process in the upper shaft groove rough blank to form the upper shaft groove.

[0046] The folding machine middle frame processing method of the present invention has at least the following beneficial effects: by symmetrically forming the third processing area and the fourth processing area, two lower middle frames can be formed after the processing is completed, thereby accelerating the processing efficiency to a certain extent; by gradually realizing the processing of the third molding area and the fourth molding area through sequential grooving, the processing of the lower middle frame is completed in a thinning manner, so that the processing is completed reasonably and orderly. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0048] Figure 1 It is a flowchart of the overall processing flow of the lower middle frame of the present invention;

[0049] Figure 2 It is a flowchart of the sub-steps of step A2 in the present invention;

[0050] Figure 3 This is a schematic diagram of the structure after processing in step A22 of the present invention;

[0051] Figure 4 This is a schematic diagram of the structure after processing in step A223 of the present invention;

[0052] Figure 5 This is a schematic diagram of the structure after processing in step A3 of the present invention;

[0053] Figure 6 It is a flowchart of the sub-steps of step A4 in the present invention;

[0054] Figure 7 This is a schematic diagram of the structure after processing in step A4 of the present invention;

[0055] Figure 8 It is a schematic diagram of the structure at another angle after processing in step A4 of the present invention;

[0056] Fig. 9 is a sub-step flow chart of step A5 in the present invention;

[0057] Fig.10 This is a schematic diagram of the structure after processing in step A5 of the present invention;

[0058] Fig.11 It is a schematic diagram of the structure at another angle after processing in step A5 of the present invention;

[0059] Fig.12 It is a flowchart of the overall processing flow of the upper middle frame in the present invention;

[0060] Fig.13 It is a flowchart of the sub-steps of step S2 in the present invention;

[0061] Fig.14 This is a schematic diagram of the structure after processing in step S22 of the present invention;

[0062] Fig.15 This is a schematic diagram of the structure after processing in step S23 of the present invention;

[0063] Fig.16This is a schematic diagram of the structure of the S3 step processing in the present invention;

[0064] Fig.17 It is a flowchart of the sub-steps of step S4 in the present invention;

[0065] Fig.18 This is a schematic diagram of the structure after processing in step S4 of the present invention;

[0066] Fig.19 It is a schematic diagram of the structure at another angle after processing in step S4 of the present invention;

[0067] Fig. 20 It is a flowchart of the sub-steps of step S5 in the present invention;

[0068] Fig.21 This is a schematic diagram of the structure after processing in step S5 of the present invention;

[0069] Fig. 22 This is a schematic diagram of the structure from another angle after processing in step S5 in this hairstyle.

[0070] The meanings of the symbols in the accompanying drawings are:

[0071] Plate 1, connecting area 11, first processing area 12, second processing area 13, first side 14, second side 15, first molding area 16, second molding area 17, upper injection molding groove 18, first injection molding part 181, second injection molding part 182, upper extension groove 183, first processing groove 191, positioning groove 192, first material reduction groove 193, upper step groove 194, second processing groove 195, third processing groove 196, fourth processing groove 197, first convex portion 198, first positioning hole 1981, first partition 199, first upper side 20, first plate surface 21, second upper side 22, convex strip structure 23, fifth processing groove 24, sixth processing groove 25, first molding blank 26, upper plastic structure 30, upper back plate 31, upper shaft groove 32, first protruding structure 331, second protruding structure 332, third protruding structure 333, card holder hole 341, power hole 342, volume hole 343, mute key hole 344, upper Partition strip 35, upper side plate 36, upper inner groove 37, upper back groove 38, upper inner side surface 39, third processing area 41, fourth processing area 42, third side surface 43, fourth side surface 44, third molding area 45, fourth molding area 46, lower injection molding groove 47, third injection molding part 471, fourth injection molding part 472, lower extension groove 473, seventh processing groove 481, second material reduction groove 482, lower step groove 483, eighth processing groove 484, ninth processing groove 485 , second protrusion 486, second positioning hole 4861, second molded blank 49, second plate surface 50, first lower side edge 51, second lower side edge 52, tenth processing groove 53, eleventh processing groove 54, lower plastic structure 60, lower back plate 61, lower shaft groove 62, fourth protrusion structure 631, fifth protrusion structure 632, sixth protrusion structure 633, lower inner side surface 64, lower back groove 65, lower side plate 66, lower partition strip 67, USB hole 681, volume hole 682. DETAILED DESCRIPTION

[0072] The present invention will be further described below in conjunction with the accompanying drawings.

[0073] The folding machine middle frame of the present invention comprises an upper middle frame and a lower middle frame.

[0074] The upper middle frame includes a square upper back plate 31 and upper side plates 36 arranged around three adjacent side edges of the upper back plate 31, and adjacent upper side plates 36 are chamfered. One side of the upper back plate 31 is recessed relative to the upper side plate 36 to form an upper back groove 38, and the other side of the upper back plate 31 is recessed relative to the upper side plate 36 to form an upper inner side surface. An upper shaft groove 32 recessed relative to the upper back plate 31 is formed on one side of the lower back plate 61 where the upper side plate 36 is not provided, and a plurality of uneven first protruding structures are processed in the upper shaft groove 32. A second protruding structure protruding relative to the upper back plate 31 is provided on the upper back plate 31, and the second protruding structure is flush in the thickness direction of the back plate. A first functional hole is provided along the width direction of the back plate on an upper side plate 36 where the upper back plate 31 is located, and the first functional hole includes a card holder hole 341 and a power hole 342. A second functional hole is provided along the width direction of the upper back plate 31 on the other opposite upper side plate 36, and the second functional hole includes a volume hole 343 and a mute key hole 344. A plurality of uneven third protruding structures 333 are provided on one side where the upper inner side surface of the upper back plate 31 is located.

[0075] The lower middle frame includes a lower back plate 61 in the direction and a lower side plate 66 arranged around three adjacent side edges of the upper back plate 31, and the adjacent lower side plates 66 are chamfered. One side of the lower back plate 61 is recessed relative to the upper side plate 36 to form a lower back groove 65, and the other side of the lower back plate 61 is recessed relative to the lower side plate 66 to form a lower inner side 64. Among them, a lower shaft groove 62 recessed relative to the lower back plate 61 is formed on one side of the lower back plate 61 where the lower side plate 66 is not provided, and a plurality of uneven fourth protruding structures are provided in the lower shaft groove 62. A fifth protruding structure protruding relative to the lower back plate 61 is provided on the lower back plate 61, and the fifth protruding structure is flush in the thickness direction of the back plate. A third functional hole is provided on a lower side plate 66 of the lower back plate 61 away from the lower shaft groove 62 along the length direction of the lower back plate 61 along the width direction of the back plate, and the third functional hole includes a USB hole 681 and a volume hole 343. A plurality of sixth protruding structures 633 having uneven shapes are formed on the lower inner side surface 64 of the lower back plate 61 .

[0076] Please refer to Figures 1 to 22 The middle frame processing method of the present invention includes processing the upper middle frame and processing the lower middle frame. Please refer to Figures 12 to 22 , the processing of the upper middle frame includes the following steps:

[0077] S1. Provide a plate 1, wherein the plate 1 includes a connecting area 11 and a first processing area 12 and a second processing area 13 symmetrically distributed on opposite sides of the connecting area 11 along the length direction of the plate 1, wherein the first processing area 12 and the second processing area 13 both include a first side surface 14 and a second side surface 15 relatively distributed along the thickness direction of the plate 1.

[0078] In this step, the plate 1 can be an aluminum extrusion material or a die-cast material. The plate 1 is in a rectangular shape and is processed with length, width and thickness. The plate 1 is divided into three areas, the middle position is the material connection area 11, and the parts of the plate 1 outside the material connection area 11 on both sides along the length direction of the plate 1 are respectively divided into a first processing area 12 and a second processing area 13, so that the material connection area 11 facilitates the fixation of the plate 1 while processing two upper middle frames together.

[0079] S2, please refer to Figures 12 to 15 A first molding area 16 adapted to one side of the upper back plate 31 of the upper middle frame is processed on the first side surfaces 14 of the first processing area 12 and the second processing area 13, and a second molding area 17 adapted to the upper inner side surface of the upper middle frame is processed on the second side surface 15, and an upper injection molding groove 18 penetrating the second molding area 17 is opened on the first molding area 16 along the thickness direction of the plate 1.

[0080] The S2 step includes the following sub-steps:

[0081] S21. A first processing groove 191 adapted to the upper back plate 31 of the upper middle frame and recessed relative to the first side surface 14 is processed on the first processing area 12 and the second processing area 13. The two first processing grooves 191 penetrate the connecting area 11 in opposite directions along the length direction of the plate 1 to form a first molding area 16.

[0082] In this step, the plate 1 is first double-sided ground, and then the first side surface 14 is processed after the plate 1 is fixed. When the thickness of the plate 1 is fixed, the first side surface 14 is thinned in sequence using CNC processing equipment, and the first processing area 12, the second processing area 13 and the connecting area 11 are thinned together to form a groove structure, so that the first processing area 12 and the second processing area 13 are processed to form a first processing groove 191 that penetrates each other. In this step, the four sides of the plate 1 are processed with concave positioning grooves 192 to facilitate the subsequent positioning of the plate 1. The depth of the positioning groove 192 is relatively shallow, and the processing position and area of ​​the upper middle frame are reserved in each positioning groove 192. A first material reduction groove 193 that penetrates the connecting area 11 is opened on the connecting area 11 along the thickness direction of the plate 1 to facilitate the subsequent processing of the connecting area 11 and the positioning of the plate 1. After processing, the side groove wall of the first processing groove 191 facing the second side surface 15 along the thickness direction of the plate 1 corresponds to a part of the upper back plate 31.

[0083] S22. An upper injection molding groove 18 is machined on the groove edge of the first machining groove 191 and penetrates the second molding area 17 along the thickness direction of the plate 1. The upper injection molding groove 18 includes a first injection molding portion 181 machined on the side of the first machining groove 191 away from the material connection area 11 and two second injection molding portions 182 respectively machined on the two side edges of the first machining groove 191 that are relatively distributed along the width direction of the plate 1.

[0084] In this step: the two first processing grooves 191 are processed along the thickness direction of the plate 1 on one side close to the material connection area 11 and on the material connection area 11, the material connection area 11 is thinned, and a stepped upper step groove 194 is formed on one side close to the material connection area 11 of the two first processing grooves 191. During processing, the two first processing grooves 191 are processed on the opposite side and the material connection area 11 by CNC processing to form the first slot structure, and then the two first processing grooves 191 and the material connection area 11 are further thinned relative to the middle of the first slot structure to form a second slot structure, and the first slot structure and the second slot structure form the upper step groove 194.

[0085] In this step, the structure of the upper injection molding groove 18 is a special-shaped structure. Since the plate 1 is made of metal, the all-metal structure is easy to cause the electrical signal to be shielded and unable to be sent during use. For this reason, the upper plastic structure 30 is mainly used to separate the metal and ensure its connection so that the electrical signal can be sent. In order to ensure the normal use of the first function hole and the second function hole in the corresponding function key of the folder, the upper injection molding groove 18 is opened on the three groove edges of the first processing groove 191. The side corresponding to the upper step groove 194 is used to open the upper shaft groove 32, so there is no need to set the upper plastic structure 30. For this reason, the first injection molding part 181 is located on the side away from the upper step groove 194 along the length direction of the plate 1, and the two second injection molding parts 182 are opened on both sides of the first processing groove 191 along the width direction of the plate 1. The structures of the first injection molding part 181 and the second injection molding part 182 are both adapted to the third protruding structure 333 on the inner side of the upper middle frame. Among them, an upper extension groove 183 is processed on the side groove wall of the second processing groove 195 on both the first injection molding part 181 and the second injection molding part 182. The upper extension groove 183 is a part of the upper injection molding groove 18, and the upper extension groove 183 penetrates the plate 1 along the thickness direction of the plate 1. It should be noted that the upper extension groove 183 extends away from the first processing groove 191 and is opened to exceed the reserved part of the plate 1 adapted to the upper middle frame, so as to separate the metal part when the upper plastic structure 30 is subsequently formed by injection molding. In this embodiment, the first processing groove 191 is opened corresponding to the upper back groove 38.

[0086] S23, a second processing groove 195 adapted to the upper inner side surface is processed along the thickness direction at the position of the second side surface 15 of the first processing area 12 and the second processing area 13 corresponding to the first processing groove 191, a third processing groove 196 is processed along the thickness direction from the second processing groove 195 to be recessed in the second processing groove 195, and a fourth processing groove 197 is opened on the second processing groove 195, the fourth processing groove 197 is located outside the third processing groove 196 close to the material connection area 11 along the thickness direction of the plate 1, and is close to the third processing groove 196 A first protrusion 198 adapted to the upper inner surface is processed on one side close to the first processing groove 191, and a first partition plate 199 is formed on the second processing groove 195 between the third processing groove 196 and the fourth processing groove 197 to separate and form a second molding area 17, the first injection molding part 181 penetrates the third processing groove 196, and a part of the second injection molding part 182 penetrates the third processing groove 196, and the other part penetrates the second processing groove 195 located on both sides of the third processing groove 196 that are relatively distributed along the width direction of the plate 1.

[0087] In this step, the second processing groove 195 is formed corresponding to the upper inner groove 37. During processing, after the CNC processing equipment processes the second processing groove 195 along the thickness direction of the plate 1, the second processing groove 195 is processed near the first side surface 14, and the third processing groove 196 is first processed on the side away from the material connection area 11, and the third protrusion structure 333 is partially avoided from processing, so that after the third processing groove 196 is completed, a protruding first protrusion 198 is formed in the third processing groove 196. The part between the second processing groove 195 and the third processing groove 196 is not connected to form the first partition 199. After the processing of this step is completed, it is fully inspected and polished to remove burrs, and then E treatment is performed before entering the next step. In this step, in order to ensure that the connection between the upper plastic structure 30 and the inner wall of the upper injection molding groove 18 is more stable after injection molding, uneven hanging grooves and hanging protrusions are processed on the inner wall of the upper injection molding groove 18. In this step, in order to prevent interference with the subsequent processing of the upper side plate 36 , a first positioning hole 1981 is opened on the first protrusion 198 .

[0088] S3, please refer to Fig.16 , plastic liquid is injected into each upper injection molding groove 18 to form an upper plastic structure 30. After this step is completed, the plate 1 is fully inspected to prevent unqualified products from entering the next processing step.

[0089] S4, please refer to Figures 17 to 19 An upper back plate 31 and an upper shaft groove 32 are processed on the first molding area 16 and the plastic structure, and an upper inner side surface is processed on the second molding area 17 and the upper plastic structure 30 , and then the connecting area 11 is disconnected to form two first molding blanks 26 .

[0090] The S4 step includes the following sub-steps:

[0091] S41, machining a rough upper shaft groove 32 adapted to the shaft of the folding machine on the upper step groove 194.

[0092] In this step, the upper step groove 194 on the first processing area 12 and the second processing area 13 is processed corresponding to the first groove structure to form a first protrusion structure 331. The first protrusion structure 331 processes a plurality of first bosses of the same height, at least two of which need to be processed with hole structures, and the other first protrusion structures 331 are lower than the first bosses and are further processed. Then, the second groove structure is processed until a rough upper shaft groove 32 is formed that is consistent with the structure of the upper shaft groove 32. At this time, since part of the hole structure is not processed, it is called a rough upper shaft groove 32.

[0093] S42, thinning the first side surface 14 along the thickness direction of the upper side plate 36 on the first side surface 14 and outside the notch of the first processing groove 191 and corresponding to the upper middle frame, and thinning the upper plastic structure 30 in the first processing groove 191, so as to process the first upper side edge 20 arranged outside the notch of the first processing groove 191 and the first board surface 21 located in the first upper side edge 20 and adapted to the upper back plate 31, the upper plastic structure 30 is a part of the first board surface 21 and is distributed around the first upper side edge 20, and a part of the upper plastic structure 30 is located on the first upper side edge 20.

[0094] In this step, the upper plastic structure 30 is processed to correspond to the second protruding structure 332, and only a part of the upper side plate 36 structure is processed for the first upper side edge 20, so as to preliminarily determine the position of the upper side plate 36, and retain the positioning groove 192 outside the plate 1 to facilitate fixing the plate 1 during further processing. In this step, the first upper side edge 20 is processed with only three edges corresponding to the upper side plate 36, and the upper extension groove 183 is processed on the first upper side edge 20 to separate the upper plastic structure 30 from the first upper side edge 20.

[0095] S43, the second side surface 15 is thinned in the thickness direction on the upper side plate 36 which is located outside the notch of the second processing groove 195 and corresponds to the upper middle frame, and the upper plastic structure 30 in the second processing groove 195 is thinned to process a second upper side edge 22 which is surrounded outside the notch of the second processing groove 195, wherein the first upper side edge 20 corresponds to the second upper side edge 22 in the thickness direction of the plate 1, and part of the upper plastic structure 30 is located on the second upper side edge 22.

[0096] In this step, the processing of the upper plastic structure 30 is to remove the redundant part of the upper plastic structure 30, that is, the plastic part located in the feed port or the exhaust structure during injection molding, so that the second processing groove 195 can form the upper inner groove 37. The second upper side 22 has the same function as the first upper side 20, except that the convex strip structure 23 is retained on the second side 15 on the side close to the material connection area 11, and the two ends of the convex strip structure 23 are respectively connected to the two second upper sides 22 to form a closed frame structure, and the second processing groove 195 is located in the second upper side 22 and the convex strip structure 23.

[0097] S44. A fifth processing groove 24 is processed on one side of the second processing groove 195 close to the material connection area 11, and a sixth processing groove 25 is processed on both sides of the second processing groove 195 outside the fourth processing groove 197 along the width direction of the plate 1, and a first convex portion 198 protruding along the thickness direction of the plate 1 is processed on the third processing groove 196, and a first inner groove surface and a plurality of first through holes penetrating the first plate surface 21 along the thickness direction of the plate 1 are processed on the first convex portion 198 corresponding to the upper inner surface 39 to form an upper inner surface of the upper middle frame.

[0098] In this step, the fifth processing groove 24 and the sixth processing groove 25 are set independently of the third processing groove 196 and the fourth processing groove 197, respectively. The fifth processing groove 24 is opened corresponding to the connection structure of the battery and connected to the fourth processing groove 197. The sixth processing groove 25 is opened corresponding to the positions of the first function hole and the second function hole, and four are opened. Each sixth processing groove 25 is through along the width direction of the plate 1, so as to form the card holder hole 341, the power hole 342, the volume hole 343 and the mute key hole 344 respectively after the upper side plate 36 is processed, so as to facilitate the subsequent installation of the card holder key, the power key, etc. The first inner groove surface is processed on the first convex portion 198 corresponding to the upper inner side surface 39, and the third processing groove 196 and the fourth processing groove 197 are processed to form the upper inner side surface 39. The first perforation is formed by fine processing on the basis of the first positioning hole 1981.

[0099] S45, cutting the connecting region 11 on both sides along the length direction of the plate 1 to form two first blanks 26.

[0100] In this step, the first molded blank 26 has been processed with the structures of the upper back plate 31, the upper back groove 38, the upper inner groove 37 and the upper inner side surface 39. After this step, the first molded blank 26 is polished to remove burrs and then cleaned.

[0101] S5, please refer to Figure 20 to Figure 22 The upper side plate 36 and the upper hole structures are processed on the first molded blank 26 to form an upper middle frame.

[0102] The S5 step includes the following sub-steps:

[0103] S51 , an upper side plate 36 is processed around the first upper side edge 20 and the second upper side edge 22 along the thickness direction, and an upper partition strip 35 is formed on the upper back plate 31 by the upper plastic structure 30 .

[0104] In this step, the first molded blank 26 is fixed by the first positioning hole 1981, and the excess part of the plate 1 is cut off to form an upper side plate 36. The upper plastic structure 30 corresponds to the three upper side plates 36 respectively, that is, upper extension grooves 183 are provided on the three upper side plates 36. The corresponding upper plastic structure 30 forms an upper partition band 35 on the three upper side plates 36 to prevent the upper middle frame from being made of all metal and affecting signal transmission. After this step, the upper side plates 36 are cleaned and fully inspected, and then polished.

[0105] S52, upper functional holes are processed on the upper side corresponding to the first processing groove 191, the second processing groove 195, the third processing groove 196 and the sixth processing groove 25 respectively.

[0106] In this step, the upper functional holes include the first functional holes and the second functional holes. After the upper side plate 36 is formed, each of the first functional holes and the second functional holes penetrates the upper side plate 36 along the width direction of the plate 1. After the burrs are removed from the grinding area, the whole inspection is performed again, and then the second grinding is performed by fine grinding. After the whole inspection, anodizing treatment is performed, and then a whole inspection is performed. Each processing of the functional holes requires a whole inspection.

[0107] S53, performing a hole drilling process in the rough blank of the upper shaft groove 32 to form the upper shaft groove 32.

[0108] After this step, continue grinding to remove burrs and conduct a full inspection. After laser engraving the required marks, assemble the auxiliary materials, conduct a full inspection and packaging, and finally ship out.

[0109] Please refer to Figures 1 to 11 The processing of the lower middle frame of the present invention includes the following steps:

[0110] A1. Provide a plate 1, wherein the plate 1 includes a connecting area 11 and a third processing area 41 and a fourth processing area 42 symmetrically distributed on opposite sides of the connecting area 11 along the length direction of the plate 1, and the third processing area 41 and the fourth processing area 42 both include a third side surface 43 and a fourth side surface 44 relatively distributed along the thickness direction of the plate 1.

[0111] In this step, the plate 1 can be an aluminum extrusion material or a die-cast material. The plate 1 is in a rectangular shape and is processed with length, width and thickness. The plate 1 is divided into three areas, the middle position is the material connection area 11, and the parts of the plate 1 outside the material connection area 11 on both sides along the length direction of the plate 1 are respectively divided into a third processing area 41 and a fourth processing area 42, so that the material connection area 11 facilitates the fixation of the plate 1 while processing two lower middle frames together.

[0112] A2, please refer to Figures 1 to 4 A third molding area 45 adapted to one side of the lower back plate 61 of the lower middle frame is processed on the third side surface 43 of the third processing area 41 and the fourth processing area 42, and a fourth molding area 46 adapted to the lower inner side surface 64 of the lower middle frame is processed on the fourth side surface 44, and a lower injection molding groove 47 penetrating the fourth molding area 46 is opened on the third molding area 45 along the thickness direction of the plate 1;

[0113] The A2 step includes the following sub-steps:

[0114] A21. A seventh processing groove 481 adapted to the lower back plate 61 and recessed relative to the third side surface 43 is processed on the third processing area 41 and the fourth processing area 42. The two seventh processing grooves 481 penetrate the connecting area 11 in opposite directions along the length direction of the plate 1 to form a third molding area 45.

[0115] In this step, the plate 1 is first double-sided ground, and then the third side 43 is processed after the plate 1 is fixed. After the plate 1 is fixed, the third side 43 is thinned in sequence using CNC processing equipment, and the third processing area 41, the fourth processing area 42 and the connecting area 11 are thinned together to form a groove structure, so that the third processing area 41 and the fourth processing area 42 are processed to form a seventh processing groove 481 that penetrates each other. In this step, the four sides of the plate 1 are also processed with recessed positioning grooves 192 to facilitate the subsequent positioning of the plate 1. A second material reduction groove 482 that penetrates the connecting area 11 is opened on the connecting area 11 along the thickness direction of the plate 1 to facilitate the subsequent processing of the connecting area 11 and the positioning of the plate 1. After processing, the groove wall of the seventh processing groove 481 along the thickness direction of the plate 1 toward the fourth side 44 corresponds to a part of the lower back plate 61.

[0116] A22. A lower injection molding groove 47 is machined on the groove edge of the seventh processing groove 481 and passes through the fourth molding area 46 along the thickness direction of the plate 1. The lower injection molding groove 47 includes a third injection molding portion 471 machined on the side of the seventh processing groove 481 away from the material connection area 11 and two fourth injection molding portions 472 machined on the two side edges of the seventh processing groove 481 which are relatively distributed along the width direction of the plate 1. The side edges of the two seventh processing grooves 481 close to the material connection area 11 and the material connection area 11 are thinned along the thickness direction of the plate 1 to form a stepped lower step groove 483 on the side edges of the two seventh processing grooves 481 close to the material connection area 11.

[0117] In this step: the side of the two seventh processing grooves 481 close to the material connection area 11 and the material connection area 11 are processed along the thickness direction of the plate 1, the material connection area 11 is thinned, and a stepped lower step groove 483 is formed on the side of the two seventh processing grooves 481 close to the material connection area 11. During processing, CNC processing is used to process the opposite side of the two seventh processing grooves 481 and the material connection area 11 together until the third groove structure is processed as a whole, and then the two seventh processing grooves 481 and the material connection area 11 are further thinned relative to the middle of the third groove structure to form a fourth groove structure, and the third groove structure and the fourth groove structure form the lower step groove 483.

[0118] In this step, the structure of the lower injection molding groove 47 is a special-shaped structure, because the plate 1 is made of metal. In order to ensure the normal use of each third functional hole in the corresponding function key of the folder, the lower injection molding groove 47 is opened on the three groove sides of the first processing groove 191, and the side corresponding to the lower step groove 483 is used to open the lower shaft groove 62, so there is no need to set the upper plastic structure 30. For this reason, the third injection molding part 471 is located on the side away from the upper step groove 194 along the length direction of the plate 1, and the two fourth injection molding parts 472 are opened on both sides of the seventh processing groove 481 along the width direction of the plate 1. The structures of the third injection molding part 471 and the fourth injection molding part 472 are both adapted to the sixth protrusion structure 633 on the lower inner side 64 of the lower middle frame. Among them, a lower extension groove 473 is processed on the side groove wall of the eighth processing groove 484 on both the third injection molding part 471 and the fourth injection molding part 472, and the lower extension groove 473 is a part of the lower injection molding groove 47, and the lower extension groove 473 passes through the plate 1 along the thickness direction of the plate 1. It should be noted that the lower extension groove 473 is arranged in the same manner as the upper extension groove 183 so as to separate the metal part when the lower plastic structure 60 is subsequently formed by injection molding. In this embodiment, the seventh processing groove 481 is opened corresponding to the upper back groove 38.

[0119] A23. An eighth processing groove 484 adapted to the lower inner side surface 64 is processed along the thickness direction at a position on the fourth side surface 44 of the third processing area 41 and the fourth processing area 42 that is opposite to the seventh processing groove 481, and a ninth processing groove 485 is processed along the thickness direction from the eighth processing groove 484 to be recessed in the eighth processing groove 484, a second protrusion 486 is formed in the eighth processing groove 484 and outside the ninth processing groove 485, and the lower plastic structure 60 passes through the second protrusion 486, thereby forming a fourth molding area 46.

[0120] In this step, the eighth processing groove 484 is formed corresponding to the lower inner groove. During processing, after the CNC processing equipment processes the eighth processing groove 484 along the thickness direction of the plate 1, the eighth processing groove 484 is processed near the third side 43. First, the eighth processing groove 484 is processed on the side away from the material connection area 11, and the sixth protrusion structure 633 is partially avoided from processing, so that after the eighth processing groove 484 is completed, a second protrusion 486 protruding relative to the ninth processing groove 485 is formed in the eighth processing groove 484 and outside the ninth processing groove 485. After the processing of this step is completed, it is fully inspected and polished to remove burrs, and then E treatment is performed before entering the next step. In this step, in order to ensure that the lower plastic structure 60 is more firmly connected to the inner wall of the upper injection molding groove 18 after injection molding, the inner wall of the lower injection molding groove 47 is also processed with uneven hanging grooves and hanging protrusions. And a second positioning hole is opened on the second protrusion 486.

[0121] A3. Please refer to Figure 5 , plastic liquid is injected into each lower injection molding groove 47 to form a lower plastic structure 60.

[0122] After this step is completed, the plate 1 is fully inspected to prevent unqualified products from entering the next processing step.

[0123] A4, please refer to Figures 6 to 8 , a lower back plate 61 and a lower shaft groove 62 are processed on the third molding area 45 and the lower plastic structure 60 , a lower inner side surface 64 is processed on the third molding area 45 and the lower plastic structure 60 , and then the connecting area 11 is disconnected to form two second molding blanks 49 ;

[0124] The A4 step includes the following sub-steps:

[0125] A41. A rough lower shaft groove 62 is machined on the lower step groove 483 to be suitable for the folding machine shaft.

[0126] In this step, the lower step groove 483 on the third processing area 41 and the fourth processing area 42 is processed corresponding to the third groove body structure to form a fourth protruding structure 631, and then processed corresponding to the fourth groove body structure until a lower shaft groove 62 rough blank consistent with the structure of the lower shaft groove 62 is formed. At this time, since part of the hole structure is not processed, it is called a lower shaft groove 62 rough blank.

[0127] A42. On the third side surface 43 and outside the notch of the seventh processing groove 481 and corresponding to the lower side plate 66 of the lower middle frame, the third side surface 43 is thinned in the thickness direction, and the lower plastic structure 60 in the seventh processing groove 481 is thinned, so as to process the first lower side edge 51 surrounded by the notch of the seventh processing groove 481 and the second panel surface 50 located in the first lower side edge 51 and adapted to the lower back panel 61, the lower plastic structure 60 is a part of the second panel surface 50 and is distributed around the first lower side edge 51, and a part of the lower plastic structure 60 is located on the first lower side edge 51.

[0128] In this step, the lower plastic structure 60 is processed to correspond to the fourth protruding structure 631, and only a part of the lower side plate 66 structure is processed for the first lower side edge 51, so as to preliminarily determine the position of the lower side plate 66, and retain the positioning groove 192 outside the plate 1 to facilitate fixing the plate 1 during further processing. In this step, the first lower side edge 51 is also processed with only three edges corresponding to the lower side plate 66, and the lower extension groove 473 is processed on the first lower side edge 51 to separate the lower plastic structure 60 from the first lower side edge 51.

[0129] A43. On the fourth side surface 44 and outside the notch of the eighth processing groove 484 and corresponding to the lower side plate 66 of the lower middle frame, the fourth side surface 44 is thinned along the thickness direction, and then the lower plastic structure 60 in the eighth processing groove 484 is continuously thinned to machine out the second lower side edge 52 surrounded outside the notch of the eighth processing groove 484, wherein the first lower side edge 51 corresponds to the second lower side edge 52 in the thickness direction of the plate 1, and part of the lower plastic structure 60 is located on the second lower side edge 52.

[0130] In this step, the processing of the lower plastic structure 60 is to remove the redundant part of the lower plastic structure 60 so that the eighth processing groove 484 can form a lower inner groove. The second lower side 52 has the same function as the first lower side 51, except that the convex strip structure 23 is also retained on the side of the fourth side 44 close to the material connection area 11, and the two ends of the convex strip structure 23 are respectively connected to the two second lower sides 52 to form a closed frame structure, and the eighth processing groove 484 is located in the second lower side 52 and the convex strip structure 23.

[0131] A44. A tenth processing groove 53 and an eleventh processing groove 54 recessed in the eighth processing groove 484 are processed on the second protrusion 486 and the lower plastic structure 60 along the thickness direction of the plate 1. The tenth processing groove 53 and the eleventh processing groove 54 are distributed on both sides of the ninth processing groove 485 along the length direction of the plate 1. The tenth processing groove 53 is processed to form a second inner groove surface and a plurality of second through holes penetrating the second plate surface 50 along the thickness direction of the plate 1 corresponding to the lower inner side surface 64 of the lower middle frame, so as to form the lower inner side surface 64 of the lower middle frame.

[0132] In this step, the tenth processing groove 53 is formed by processing the second protrusion 486 and the second inner groove surface is formed corresponding to the structure of the lower inner side surface 64 of the folder. The ninth processing groove 485 is used to install the battery, and the tenth processing groove 53 is used to install various circuit structures. The eleventh processing groove 54 is connected to the ninth processing groove 485 for installing the charging structure of the battery, and the second perforation is finely processed on the basis of the second positioning hole 4861. The second inner groove surface, the ninth processing groove 485 and the tenth processing groove 53 together form the lower inner side surface 64.

[0133] A45, the connecting area 11 is cut on both sides along the length direction of the plate 1 to form two second blanks 49.

[0134] A5. Please refer to Figures 9 to 11 The lower side plate 66 and the lower hole structures are processed on the second molded blank 49 to form a lower middle frame.

[0135] The A5 step includes the following sub-steps:

[0136] A51 , a lower side plate 66 is processed around the first lower side edge 51 and the second lower side edge 52 along the thickness direction, and the lower plastic structure 60 forms a lower partition belt 67 on the lower back plate 61 .

[0137] A52, a lower functional hole is machined on the lower side corresponding to the tenth machining groove 53.

[0138] In this step, the lower functional hole is the third functional hole, including a USB hole 681 and a volume hole 343 opened on the lower side plate 66. The USB hole 681 and the volume hole 343 are both opened on the lower side plate 66 on the side of the plate 1 away from the lower shaft groove 62 along the length direction of the plate 1 and connected to the tenth processing groove 53.

[0139] A53. Perform hole drilling in the rough blank of the lower shaft groove 62 to form the lower shaft groove 62.

Claims

1. A method for processing a middle frame of a folding machine, characterized in that: The process includes processing the lower middle frame, wherein the processing of the lower middle frame includes the following steps: A1. Provide a plate, wherein the plate comprises a material connection region and a third processing region and a fourth processing region symmetrically distributed on opposite sides of the material connection region along the length direction of the plate, wherein the third processing region and the fourth processing region both comprise a third side surface and a fourth side surface relatively distributed along the thickness direction of the plate; A2. A third molding area adapted to one side of the lower back plate of the lower middle frame is processed on the third side surface of the third processing area and the fourth processing area, and a fourth molding area adapted to the lower inner side surface of the lower middle frame is processed on the fourth side surface, and a lower injection molding groove penetrating the fourth molding area is opened on the third molding area along the thickness direction of the plate; A3. Injecting plastic liquid into each lower injection molding tank to form a lower plastic structure; A4, processing a lower back plate and a lower shaft groove on the third molding area and the lower plastic structure, processing a lower inner side surface on the third molding area and the lower plastic structure, and then disconnecting the connecting area to form two second molding blanks; A5. Process the lower side plate and lower hole structures on the second molded blank to form a lower middle frame.

2. The method for processing the middle frame of a folding machine according to claim 1, characterized in that: The A2 step includes the following sub-steps: A21. A seventh processing groove adapted to the lower back plate and recessed relative to the third side surface is processed on the third processing area and the third side surface of the fourth processing area. The two seventh processing grooves penetrate the connecting area in the length direction of the plate to form a third molding area. A22, a lower injection molding groove is machined on the groove edge of the seventh processing groove and penetrates the fourth molding area along the thickness direction of the plate, and the lower injection molding groove includes a third injection molding part machined on one side of the seventh processing groove away from the material connection area and two fourth injection molding parts respectively machined on two side edges of the seventh processing groove that are oppositely distributed along the width direction of the plate; A23. An eighth processing groove matching the lower inner side surface is processed along the thickness direction at the position of the fourth side surface of the third processing area and the fourth processing area corresponding to the seventh processing groove, and a ninth processing groove is processed along the thickness direction from the eighth processing groove to be recessed in the eighth processing groove, a second convex portion is formed in the eighth processing groove and outside the ninth processing groove, and the lower plastic structure passes through the second convex portion, thereby forming a fourth molding area.

3. The method for processing the middle frame of a folding machine according to claim 2, characterized in that: In the step A22: thinning is performed along the thickness direction of the plate on one side of the two seventh processing grooves close to the connecting material area and on the connecting material area to form a stepped lower step groove on one side of the two seventh processing grooves close to the connecting material area.

4. The method for processing the middle frame of a folding machine according to claim 3, characterized in that: The A4 step includes the following sub-steps: A41, processing a rough blank of a lower shaft groove on the lower step groove to be adapted to the shaft of the folding machine; A42, on the third side surface and outside the notch of the seventh processing groove, the lower side plate corresponding to the lower middle frame is thinned along the thickness direction of the third side surface and the lower plastic structure in the seventh processing groove, so as to process a first lower side edge surrounded outside the notch of the seventh processing groove and a second panel surface located inside the first lower side edge and adapted to the lower back panel, the lower plastic structure is a part of the second panel surface and is distributed around the first lower side edge, and a part of the lower plastic structure is located on the first lower side edge; A43, on the fourth side surface and outside the notch of the eighth processing groove, the lower side plate corresponding to the lower middle frame is thinned along the thickness direction of the fourth side surface and the lower plastic structure in the eighth processing groove, so as to process a second lower side edge surrounded outside the notch of the eighth processing groove, the first lower side edge corresponds to the second lower side edge in the thickness direction of the plate, and part of the lower plastic structure is located on the second lower side edge; A44. A tenth processing groove and an eleventh processing groove are processed on the second convex portion and the lower plastic structure along the thickness direction of the plate, and are recessed in the eighth processing groove. The tenth processing groove and the eleventh processing groove are distributed on both sides of the ninth processing groove along the length direction of the plate. The tenth processing groove is processed corresponding to the lower inner side surface of the lower middle frame to form a second inner groove surface and a plurality of second through holes penetrating the second plate surface along the thickness direction of the plate, so as to form a lower inner side surface of the lower middle frame; A45. The connecting area is cut on both sides along the length direction of the plate to form two second blanks.

5. The method for processing the middle frame of a folding machine according to claim 4, characterized in that: The A5 step includes the following sub-steps: A51, processing a lower side plate around the first lower side edge and the second lower side edge in the thickness direction, and the lower plastic structure forms a lower partition belt on the lower back plate; A52, machining a lower functional hole on the lower side corresponding to the tenth machining groove; A53. Perform hole drilling in the rough blank of the lower shaft groove to form the lower shaft groove.

6. The method for processing the middle frame of a folding machine according to claim 1, characterized in that: The method further includes processing the upper middle frame, wherein the processing of the upper middle frame includes the following steps: S1. Provide a plate, wherein the plate comprises a material connection region and a first processing region and a second processing region symmetrically distributed on opposite sides of the material connection region along the length direction of the plate, wherein the first processing region and the second processing region both comprise a first side surface and a second side surface that are oppositely distributed along the thickness direction of the plate; S2, a first molding area adapted to one side of the upper back plate of the upper middle frame is processed on the first side of the first processing area and the second processing area, and a second molding area adapted to the upper inner side of the upper middle frame is processed on the second side, and an upper injection molding groove penetrating the second molding area is opened on the first molding area along the thickness direction of the plate; S3, injecting plastic liquid into each upper injection molding groove to form an upper plastic structure; S4, processing an upper back plate and an upper shaft groove on the first molding area and the plastic structure, processing an upper inner side surface on the second molding area and the upper plastic structure, and then disconnecting the connecting area to form two first molding blanks; S5, processing the upper side plate and each upper hole structure on the first molded blank to form an upper middle frame.

7. The method for processing the middle frame of a folding machine according to claim 6, characterized in that: The S2 step includes the following sub-steps: S21, processing first processing grooves adapted to the upper back plate of the upper middle frame and recessed relative to the first side surface on the first processing area and the second processing area, wherein the two first processing grooves penetrate the connecting area in the length direction of the plate toward each other to form a first molding area; S22, processing an upper injection molding groove on the groove edge of the first processing groove and penetrating the second molding area along the thickness direction of the plate, the upper injection molding groove comprising a first injection molding portion processed on a side of the first processing groove away from the material connection area and two second injection molding portions respectively processed on two side edges of the first processing groove oppositely distributed along the width direction of the plate; S23. A second processing groove adapted to the upper inner side surface is processed along the thickness direction at the position corresponding to the first processing groove on the second side surfaces of the first processing area and the second processing area, a third processing groove is processed along the thickness direction from the second processing groove to be recessed in the second processing groove, and a fourth processing groove is opened on the second processing groove and is located outside the third processing groove close to the material connecting area along the thickness direction of the plate. A first convex portion adapted to the upper inner side surface is processed on the side of the third processing groove close to the first processing groove, and a first partition is formed on the second processing groove between the third processing groove and the fourth processing groove to separate the second molding area, the first injection molding part penetrates the third processing groove, and a part of the second injection molding part penetrates the third processing groove and the other part penetrates the second processing groove located outside the two sides of the third processing groove that are relatively distributed along the width direction of the plate.

8. The method for processing the middle frame of a folding machine according to claim 7, characterized in that: In the step S22: one side of the two first processing grooves close to the connecting area and the connecting area are processed along the thickness direction of the plate, the connecting area is thinned, and a stepped upper step groove is formed on one side of the two first processing grooves close to the connecting area.

9. The method for processing the middle frame of a folding machine according to claim 8, characterized in that: The S4 step includes the following sub-steps: S41, processing a rough upper shaft groove on the upper step groove adapted to the shaft of the folding machine; S42, thinning the upper plastic structure on the first side surface and outside the notch of the first processing groove and in the first processing groove along the thickness direction of the upper side plate corresponding to the upper middle frame, so as to process a first upper side edge arranged outside the notch of the first processing groove and a first board surface located inside the first upper side edge and adapted to the upper back plate, wherein the upper plastic structure is a part of the first board surface and is distributed around the first upper side edge, and a part of the upper plastic structure is located on the first upper side edge; S43, thinning the second side surface and the upper plastic structure in the second processing groove along the thickness direction of the upper side plate corresponding to the upper middle frame on the second side surface and outside the notch of the second processing groove, so as to process a second upper side edge surrounded outside the notch of the second processing groove, wherein the first upper side edge corresponds to the second upper side edge in the thickness direction of the plate, and part of the upper plastic structure is located on the second upper side edge; S44, a fifth processing groove is processed on one side of the second processing groove close to the material connection area, and a sixth processing groove is processed on both sides of the second processing groove outside the fourth processing groove in the width direction of the plate, a first convex portion protruding in the thickness direction of the plate is processed on the third processing groove, and a first inner groove surface and a plurality of first through holes penetrating the first plate surface in the thickness direction of the plate are processed on the first convex portion corresponding to the upper inner side surface, so as to form an upper inner side surface of the upper middle frame; S45, cutting the connecting area on both sides along the length direction of the plate to form two first forming blanks.

10. The method for processing the middle frame of a folding machine according to claim 9, characterized in that: The S5 step includes the following sub-steps: S51, processing an upper side plate around the first upper side edge and the second upper side edge along the thickness direction, and forming an upper partition strip on the upper back plate with an upper plastic structure; S52, processing upper functional holes on the upper side corresponding to the first processing groove, the second processing groove, the third processing groove and the sixth processing groove respectively; S53, performing a hole drilling process in the upper shaft groove rough blank to form the upper shaft groove.

Images