A molding press for manhole cover processing

Abstract

The present invention relates to the technical field of manhole cover die-casting forming equipment, and a forming die-casting machine for manhole cover processing, which includes a base, two pairs of legs, a limiting component, a jacking component, a pair of reversing structures, a die-forming structure, and a pressing-down structure. One end of each of the two pairs of legs is fixedly arranged on the lower wall of the base and is located at the four corner positions. The limiting component is fixedly arranged on the upper wall of the base and is located at the four corner positions. The jacking component is fixedly arranged in the middle of the lower wall of the base. A pair of reversing structures are respectively arranged on the lower walls at the front and rear ends of the base and are symmetrical to each other. The die-forming structure is fixedly arranged on the lower wall of the base and is located at the position of the moving groove. The pressing-down structure is fixedly arranged in the middle of the upper wall of the base. The present invention is compatible with rectangular and circular manhole covers. Through the detachable and flip design of the first template and the second template, the rectangular die groove and the annular die groove can be quickly switched, meeting the processing requirements of rectangular and circular manhole covers, realizing multi-purpose use of one machine, making the die switching more convenient, and shortening the production preparation time.

Description

Technical Field

[0001] The present invention relates to the technical field of manhole cover die-casting forming equipment, and specifically relates to a forming die press for manhole cover processing. Background Art

[0002] Although the existing manhole cover processing and forming equipment has significant advantages in production efficiency and forming accuracy, there are still some disadvantages and limitations. The existing equipment has high costs, insufficient flexibility, and complex die replacement. For example, in the production of manhole covers, a corresponding manhole cover frame is required for installing and bearing the manhole cover. Therefore, two sets of equipment need to be purchased or the die needs to be disassembled and replaced during production. The die replacement process is complex and time-consuming, reducing the flexibility of the equipment and production efficiency. Moreover, some manhole covers are circular or rectangular in shape. Summary of the Invention

[0003] The purpose of the present invention is to solve the above-mentioned technical problems of high equipment costs and complex die replacement in the existing technology, and provide a forming die press for manhole cover processing. To achieve the purpose of the present invention, the following technical solutions are adopted.

[0004] To achieve the above-mentioned problem-solving purpose, the present invention provides the following technical solution: A forming die press for manhole cover processing, including a base, two pairs of legs, a limiting component, a jacking component, a pair of reversing structures, a forming die structure, and a pressing-down structure. Five jacking holes are vertically penetrated through the middle of the base, and moving grooves are respectively opened in the middle of the left and right ends of the base. One end of each of the two pairs of legs is fixedly arranged on the lower wall of the base and located at the four corner positions. The limiting component is fixedly arranged on the upper wall of the base and located at the four corner positions. The jacking component is fixedly arranged in the middle of the lower wall of the base. A pair of reversing structures are respectively arranged on the lower walls of the front and rear ends of the base and are symmetrical to each other. The forming die structure is fixedly arranged on the lower wall of the base and located at the position of the moving groove. The pressing-down structure is fixedly arranged in the middle of the upper wall of the base. The limiting component is used to limit the forming die structure, the jacking component is used for demolding, a pair of reversing structures are used to change the shape of the die, and the pressing-down structure is used to apply pressure for forming.

[0005] Preferably, the limiting component includes two pairs of first hydraulic cylinders and two pairs of top claws; the two pairs of first hydraulic cylinders are respectively inclined and arranged on the upper wall of the base and respectively correspond to the diagonals of the base. The two pairs of top claws are both L-shaped. The two pairs of top claws are respectively fixedly arranged on the telescopic ends of the first hydraulic cylinders, and the top claws are symmetrical to each other.

[0006] Preferably, the jacking assembly includes a support frame, a second hydraulic cylinder, a bracket, and five jack columns; the support frame is fixedly arranged in the middle of the lower wall of the base, one end of the second hydraulic cylinder is fixedly arranged on the support frame, the middle of the bracket is fixedly arranged on the telescopic end of the second hydraulic cylinder, and the bracket is located below the base. One end of each of the five jack columns is fixedly arranged on the bracket, and the other end of each jack column movably penetrates through the jacking holes.

[0007] Preferably, the commutation structure includes a first shaft rod, a gear, a carriage, a rack, a cylinder frame, and a third hydraulic cylinder; the top end of the first shaft rod movably penetrates through the base and is located on the center line at the front end of the base. The first shaft rod is located on the front side of the moving groove. The gear is fixedly sleeved on the bottom end of the first shaft rod. The carriage is fixedly arranged on the lower wall of the base and is located on the left side of the gear. The rack is movably sleeved on the carriage and meshes with the gear. The cylinder frame is fixedly arranged on the lower wall of the base and is located in front of the carriage. One end of the third hydraulic cylinder is fixedly arranged on the cylinder frame, and the telescopic end of the third hydraulic cylinder is connected to one end of the rack.

[0008] Preferably, the mold forming structure includes a pair of electric slide rails, a pair of frames, a pair of motors, a pair of second shaft rods, two pairs of first templates, two pairs of second templates, two pairs of fixing bolts, an embedded frame, and a pressing frame; the pair of electric slide rails are respectively fixedly arranged on the lower walls at the left and right ends of the base. The electric slide rails are located at the rear side of the moving groove. The pair of frames are respectively fixedly arranged on the electric slide rails and move left and right. The top ends of the frames are movably inserted into the moving groove. The pair of motors are respectively fixedly arranged in the middle of the inner lower walls of the frames. One end of each of the pair of second shaft rods movably penetrates through the middle of the top ends of the frames, and the other end of each second shaft rod is connected to the driving end of the motor. The two pairs of first templates are both convex, and symmetrically provided with sockets in the middle of one end. The middle parts of the lower walls of the two pairs of first templates are respectively fixedly sleeved on the top end of the first shaft rod and one end of the second shaft rod, and the first templates are respectively parallel to the four sides of the base. Among them, the lengths of the first templates at the front and rear ends are less than the lengths of the first templates at the left and right ends. The two ends of the two pairs of first templates are respectively relatively and adhesively connected. One end of each of the two pairs of second templates is movably inserted into the socket parts of the first templates. The other ends of the two pairs of second templates are both arc-shaped structures with the same diameter. The two pairs of fixing bolts are respectively movably screwed into the middle parts of the first templates and tightened against one end of the second templates. The embedded frame is rectangular and provided with five insertion columns on the lower wall. The embedded frame is detachably arranged in the middle of the upper wall of the base, and the insertion columns are movably inserted into the jacking holes. The embedded frame is located inside the two pairs of first templates. The pressing frame is a rectangular frame. The pressing frame is detachably arranged on the lower wall of the rectangular pressing plate and fixed by bolts.

[0009] Preferably, the pressing-down structure includes a gantry, a pair of fourth hydraulic cylinders, a rectangular pressing plate, a pair of fifth hydraulic cylinders, a cross plate, and a pressing column; both ends of the gantry are fixedly arranged on the middle parts of the upper walls at the front and rear ends of the base respectively, one ends of the pair of fourth hydraulic cylinders are symmetrically arranged on the inner upper wall of the gantry respectively, the rectangular pressing plate is fixedly arranged between the telescopic ends of the fourth hydraulic cylinders, and the rectangular pressing plate corresponds to the middle part of the base plate, one ends of the pair of fifth hydraulic cylinders are fixedly arranged on the upper wall of the rectangular pressing plate and are located at one pair of corner parts, the cross plate is fixedly arranged between the telescopic ends of the fifth hydraulic cylinders, one end of the pressing column movably penetrates between the rectangular pressing plates, and the other end of the pressing column is fixedly connected to the middle part of the cross plate.

[0010] Preferably, one end of the pressing column is located below the rectangular pressing plate or the lower wall of the pressing column is on the same horizontal plane as the lower wall of the rectangular pressing plate.

[0011] Preferably, a rectangular die groove is formed in the middle after the first templates are butted against each other or a circular die groove is formed in the middle after the second templates are butted against each other.

[0012] Preferably, the top claws are respectively attached to one ends of a pair of first templates and are located at the corner parts.

[0013] A molding press for manhole cover processing proposed by the present invention has the beneficial effects as follows:

[0014] 1. The present invention is compatible with rectangular and circular manhole covers. Through the detachable and flip design of the first template and the second template, the rectangular die groove and the annular die groove can be quickly switched, meeting the processing requirements of rectangular and circular manhole covers, realizing multi-purpose use of one machine, making the die switching more convenient, and shortening the production preparation time.

[0015] 2. The first template and the second template of the present invention adopt a detachable design, which is convenient for disassembly, replacement and maintenance, reduces the maintenance cost of the equipment. Through the adjustment of the pressing-down structure and die-casting molding, the dimensions and shape accuracy of the manhole cover and the manhole cover seat can be ensured, improving the product quality. The splicing and flip design of the first template and the second template ensure the stability of the die groove and reduce the error during the molding process.

[0016] 3. Through the flip and splicing design of the first template and the second template, the present invention reduces the number of special molds, reduces the mold cost, is not only applicable to ordinary rectangular and circular manhole covers, but also can adapt to the processing of other special-shaped manhole covers by adjusting the templates and the pressing-down structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the assembly structure schematic diagram of the present invention;

[0018] Figure 2 is the assembled display structure schematic diagram of the present invention;

[0019] Figure 3 Schematic diagram of the split structure of the commutation structure;

[0020] Figure 4 Schematic diagram of the enlarged structure of the commutation structure;

[0021] Figure 5 Schematic diagram of the split structure of the mold forming structure;

[0022] Figure 6 Schematic diagram of the split structure of the downward pressing structure;

[0023] Figure 7 is Figure 3 Partial enlarged view of position A in

[0024] In the figure: 1, base; 2, leg; 3, limiting component; 31, first hydraulic cylinder; 32, top claw; 4, jacking component; 41, support frame; 42, second hydraulic cylinder; 43, bracket; 44, top column; 5, commutation structure; 51, first shaft rod; 52, gear; 53, carriage; 54, rack; 55, cylinder frame; 56, third hydraulic cylinder; 6, mold forming structure; 61, electric slide rail; 62, frame; 63, motor; 64, second shaft rod; 65, first template; 66, second template; 67, fixing bolt; 68, embedded frame; 69, downward pressing frame; 7, downward pressing structure; 71, gantry; 72, fourth hydraulic cylinder; 73, rectangular pressing plate; 74, fifth hydraulic cylinder; 75, cross plate; 76, pressing column; 8, moving groove; 9, jacking hole; 10, socket; 11, inserting column. Detailed implementation manners

[0025] The following will make a detailed description of the specific implementation manners of the present invention in conjunction with the accompanying drawings.

[0026] As Figures 1-7 shown, the present invention provides a technical solution: a molding press for manhole cover processing, including a base 1, two pairs of legs 2, a limiting component 3, a jacking component 4, a pair of commutation structures 5, a mold forming structure 6 and a downward pressing structure 7. Five jacking holes 9 are penetrated through the middle of the base 1, and moving grooves 8 are respectively opened in the middle of the left and right ends of the base 1. One ends of the two pairs of legs 2 are respectively fixedly arranged on the lower wall of the base 1 and located at the four corner positions. The limiting component 3 is fixedly arranged on the upper wall of the base 1 and located at the four corner positions. The jacking component 4 is fixedly arranged in the middle of the lower wall of the base 1. A pair of commutation structures 5 are respectively arranged on the lower walls at the front and rear ends of the base 1 and are symmetrical to each other. The mold forming structure 6 is fixedly arranged on the lower wall of the base 1 and located at the position of the moving groove 8. The downward pressing structure 7 is fixedly arranged in the middle of the upper wall of the base 1. The legs 2 are used to support the base 1. The limiting component 3 is used to limit the mold forming structure 6. The jacking component 4 is used for demolding. A pair of commutation structures 5 are used to change the shape of the mold. The downward pressing structure 7 is used to apply pressure for forming.

[0027] As a further solution of the present invention, as Figure 3 shown, the limit component 3 includes two pairs of first hydraulic cylinders 31 and two pairs of top claws 32; the two pairs of first hydraulic cylinders 31 are respectively inclined and arranged on the upper wall of the base 1 and respectively correspond to the diagonals of the base 1. The two pairs of top claws 32 are both L-shaped. The two pairs of top claws 32 are respectively fixedly arranged on the telescopic ends of the first hydraulic cylinders 31, and the top claws 32 are symmetric to each other. The first hydraulic cylinders 31 drive the top claws 32 to perform locking and fixing.

[0028] As a further solution of the present invention, as Figure 3 shown, the lifting component 4 includes a support frame 41, a second hydraulic cylinder 42, a bracket 43 and five top columns 44; the support frame 41 is fixedly arranged in the middle of the lower wall of the base 1. One end of the second hydraulic cylinder 42 is fixedly arranged on the support frame 41. The middle of the bracket 43 is fixedly arranged on the telescopic end of the second hydraulic cylinder 42, and the bracket 43 is located below the base 1. One ends of the five top columns 44 are respectively fixedly arranged on the bracket 43, and the other ends of the top columns 44 respectively pass through the lifting holes 9 movably; the second hydraulic cylinder 42 carried by the support frame 41 drives the five top columns 44 on the bracket 43 to lift through the lifting holes 9 to assist in demolding.

[0029] As a further solution of the present invention, as Figure 3 、 Figure 4 and Figure 7 shown, the commutation structure 5 includes a first shaft 51, a gear 52, a carriage 53, a rack 54, a cylinder frame 55 and a third hydraulic cylinder 56; the top end of the first shaft 51 movably passes through the base 1 and is located on the front center line of the base 1. The first shaft 51 is located on the front side of the moving groove 8. The gear 52 is fixedly sleeved on the bottom end of the first shaft 51. The carriage 53 is fixedly arranged on the lower wall of the base 1 and is located on the left side of the gear 52. The rack 54 is movably sleeved on the carriage 53, and the rack 54 meshes with the gear 52. The cylinder frame 55 is fixedly arranged on the lower wall of the base 1 and is located in front of the carriage 53. One end of the third hydraulic cylinder 56 is fixedly arranged on the cylinder frame 55, and the telescopic end of the third hydraulic cylinder 56 is connected to one end of the rack 54; the third hydraulic cylinder 56 drives the rack 54 to move under the limiting action of the carriage 53, and the rack 54 drives the gear 52 and the first shaft 51 to rotate.

[0030] As a further solution of the present invention, as Figure 5As shown in the figure, the molding structure 6 includes a pair of electric slide rails 61, a pair of frames 62, a pair of motors 63, a pair of second shaft rods 64, two pairs of first templates 65, two pairs of second templates 66, two pairs of fixing bolts 67, an embedded frame 68 and a pressing frame 69; a pair of electric slide rails 61 are respectively fixedly arranged on the lower walls at the left and right ends of the base 1, the electric slide rails 61 are located at the rear side of the moving groove 8, a pair of frames 62 are respectively fixedly arranged on the electric slide rails 61 and the frames 62 move left and right, the top ends of the frames 62 are movably inserted into the moving groove 8, a pair of motors 63 are respectively fixedly arranged in the middle of the inner lower walls of the frames 62, one ends of a pair of second shaft rods 64 respectively movably penetrate through the middle of the top ends of the frames 62, and the other ends of the second shaft rods 64 are respectively connected with the driving ends of the motors 63. Both pairs of first templates 65 are convex, and sockets 10 are symmetrically opened in the middle of one ends. The middle parts of the lower walls of the two pairs of first templates 65 are respectively fixedly sleeved on the top ends of the first shaft rods 51 and one ends of the second shaft rods 64, and the first templates 65 are respectively parallel to the four sides of the base 1. Among them, the lengths of the first templates 65 at the front and rear ends are less than the lengths of the first templates 65 at the left and right ends. The two ends of the two pairs of first templates 65 are respectively relatively and fittingly connected. One ends of the two pairs of second templates 66 are respectively movably inserted into the socket 10 parts of the first templates 65. The other ends of the two pairs of second templates 66 are both arc-shaped structures with the same diameter. The two pairs of fixing bolts 67 are respectively movably screwed into the middle parts of the first templates 65 and press against one ends of the second templates 66. The embedded frame 68 is rectangular and five insertion posts 11 are arranged on the lower wall. The embedded frame 68 is detachably arranged in the middle of the upper wall of the base 1 and the insertion posts 11 are movably inserted into the jacking holes 9. The embedded frame 68 is located inside the two pairs of first templates 65. The pressing frame 69 is a rectangular frame. The pressing frame 69 is detachably arranged on the lower wall of the rectangular pressing plate 73 and is fixed by bolts. The electric slide rails 61 drive the two first templates 65 and the second templates 66 to move in opposite directions, separating from the other two first templates 65 and the second templates 66, thereby prompting the other two first templates 65 to turn over and change the surface without obstruction by means of the first shaft rod 51. The motors 63 drive the second shaft rods 64 to rotate to prompt one pair of first templates 65 to rotate and change the surface. The embedded frame 68 and the pressing frame 69 cooperate to produce the well cover seat. A rectangular mold groove is formed in the middle after the first templates 65 are butted or a circular mold groove is formed in the middle after the second templates 66 are butted, which is used for processing well covers or well seats of different shapes. The top claws 32 respectively fit against one ends of a pair of first templates 65 and are located at the corner parts, which are used for fixing the first templates 65 after butting.

[0031] As a further solution of the present invention, as Figure 6As shown in the figure, the pressing structure 7 includes a gantry 71, a pair of fourth hydraulic cylinders 72, a rectangular pressing plate 73, a pair of fifth hydraulic cylinders 74, a cross plate 75, and a pressing column 76. Both ends of the gantry 71 are fixedly arranged at the middle parts of the upper walls of the front and rear ends of the base 1. One ends of the pair of fourth hydraulic cylinders 72 are symmetrically arranged on the inner upper wall of the gantry 71. The rectangular pressing plate 73 is fixedly arranged between the telescopic ends of the fourth hydraulic cylinders 72, and the rectangular pressing plate 73 corresponds to the middle part of the base plate. One ends of the pair of fifth hydraulic cylinders 74 are fixedly arranged on the upper wall of the rectangular pressing plate 73 and are located at one pair of corner parts. The cross plate 75 is fixedly arranged between the telescopic ends of the fifth hydraulic cylinders 74. One end of the pressing column 76 movably penetrates between the rectangular pressing plates 73, and the other end of the pressing column 76 is fixedly connected to the middle part of the cross plate 75. The rectangular pressing plate 73 is driven by the fourth hydraulic cylinder 72 to descend for processing rectangular manhole covers, or the fifth hydraulic cylinder 74 is driven to make the pressing column 76 pass through the rectangular pressing plate 73 for extrusion molding of circular manhole covers. One end of the pressing column 76 is located below the rectangular pressing plate 73 or the lower wall of the pressing column 76 is on the same horizontal plane as the lower wall of the rectangular pressing plate 73, which is used for processing manhole covers of different shapes.

[0032] The detailed connection means are well-known techniques in the art. The following mainly introduces the working principle and process, and the specific work is as follows.

[0033] The equipment is supported and fixed by the legs 2 on the lower wall of the base 1, and the base 1 is supported at a certain height. After the equipment is powered on, the driving limit component 3, the commutation structure 5, and the molding structure 6 are driven according to the requirements of processing manhole covers. That is, the first hydraulic cylinder 31 in the driving limit component 3 contracts, and the top claw 32 is disengaged from the first template 65 to unlock. Then, the two electric slide rails 61 in the molding structure 6 are driven to drive two of the first templates 65 to move away from each other relatively, that is, the driving of the electric slide rail 61 drives the frame 62 and the second shaft rod 64 to move along the moving groove 8. Then, the third hydraulic cylinder 56 on the cylinder frame 55 in the commutation structure 5 extends and retracts, and the third hydraulic cylinder 56 drives the rack 54 to move under the limiting action of the carriage 53. Furthermore, the first shaft rod 51 is driven to rotate in the base 1 through the engagement of the rack 54 and the gear 52, so as to drive the other two first templates 65 to rotate 180 degrees. Secondly, the motor 63 in the frame 62 is controlled to drive the first template 65 on the second shaft rod 64 to rotate 180 degrees as well, so that the first template 65 realizes the relative wall surface change, and then it is reset for docking and connection.

[0034] Since one side of the first template 65 is fixed to the second template 66 by fastening bolts, when the first template 65 is inside the second template 66 relative to each other, a circular space is formed relative to the second template 66, and composite materials can be put in for the processing of circular manhole covers; when the second template 66 is located outside the first template 65 after splicing, the first template 65 forms a rectangular space for the processing of rectangular manhole covers; the embedded frame 68 can also be inserted into the jacking hole 9 by means of the insertion post 11, and then the four side walls of the embedded frame 68 are respectively corresponding to the first template 65 to form a rectangular frame space, and the pressing frame 69 can be installed under the lower pressing structure 7 on the lower wall of the rectangular pressing plate 73 for fitting and corresponding, for extruding and forming the manhole seat of the rectangular frame.

[0035] When processing circular manhole covers, the fourth hydraulic cylinder 72 on the driving gantry 71 is extended, and at the same time, the fifth hydraulic cylinder 74 is driven to drive the pressing column 76 on the cross plate 75 to pass through the rectangular pressing plate 73, so as to drive the pressing column 76 to descend into the circular space formed by the splicing of the second template 66 for the forming of circular manhole covers.

[0036] When processing rectangular manhole covers, the fourth hydraulic cylinder 72 is driven to drive the rectangular pressing plate 73 to descend and insert into the rectangular space formed by the first template 65 for forming, and at the same time, the lower wall of the pressing column 76 is fitted with the lower wall of the rectangular pressing plate 73 by means of the fifth hydraulic cylinder 74 to form a plane.

[0037] Since the two ends of the first template 65 are not stable after being butt-jointed respectively and are prone to deformation under the action of downward pressure extrusion, it is necessary to control the top claws 32 to be stuck at the butt-joint of the two first templates 65 for limit locking; after the forming process, after the pressing column 76 or the rectangular pressing plate 73 is raised and reset, the second hydraulic cylinder 42 on the support frame 41 in the jacking assembly 4 can be driven to extend, driving the jacking column 44 on the bracket 43 to pass through the jacking hole 9 to assist in demoulding or to first separate the embedded frame 68, and then driving two of the first templates 65 on the electric slide rail 61 to move away from each other to facilitate demoulding; since the second template 66 in this equipment is fixed to the socket 10 part of the first template 65 by fastening bolts, it can be removed and replaced due to wear, etc., and during demoulding, the two first templates 65 or the second template 66 can also be separated in advance by means of the electric slide rail 61 to help apply force for demoulding and reduce wear; the equipment can also first drive the pressing column 76 to pass through the rectangular pressing plate 73 and fit with the upper wall of the base 1 in the middle between the first templates 65, and then a circular shielding object is formed in the middle of the rectangular space formed by the splicing of the first templates 65. Then, after the material is put in, the fifth hydraulic cylinder 74 and the fourth hydraulic cylinder 72 are driven simultaneously, so that the pressing column 76 remains stationary while the rectangular pressing plate 73 descends to form a rectangular manhole cover frame with a circular hollow.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A forming press for manhole cover processing, characterized in that: It includes a base (1), two pairs of legs (2), a limiting component (3), a jacking component (4), a pair of reversing structures (5), a mold-forming structure (6), and a pressing-down structure (7). Five jacking holes (9) are vertically penetrated through the middle of the base (1), and moving grooves (8) are formed in the middle of the left and right ends of the base (1). One end of each of the two pairs of legs (2) is fixedly arranged on the lower wall of the base (1) and located at the four corner positions. The limiting component (3) is fixedly arranged on the upper wall of the base (1) and located at the four corner positions. The jacking component (4) is fixedly arranged in the middle of the lower wall of the base (1). A pair of reversing structures (5) are respectively arranged on the lower walls of the front and rear ends of the base (1) and are symmetrical to each other. The mold-forming structure (6) is fixedly arranged on the lower wall of the base (1) and located at the position of the moving groove (8). The pressing-down structure (7) is fixedly arranged in the middle of the upper wall of the base (1). The limiting component (3) is used to limit the mold-forming structure (6). The jacking component (4) is used for demolding. A pair of reversing structures (5) are used to change the shape of the mold. The pressing-down structure (7) is used to apply pressure for forming; The reversing structure (5) includes a first shaft rod (51), a gear (52), a sliding frame (53), a rack (54), a cylinder frame (55), and a third hydraulic cylinder (56); The top end of the first shaft rod (51) movably penetrates through the base (1) and is located on the front center line of the base (1). The first shaft rod (51) is located on the front side of the moving groove (8). The gear (52) is fixedly sleeved on the bottom end of the first shaft rod (51). The sliding frame (53) is fixedly arranged on the lower wall of the base (1) and is located on the left side of the gear (52). The rack (54) is movably sleeved on the sliding frame (53), and the rack (54) engages with the gear (52). The cylinder frame (55) is fixedly arranged on the lower wall of the base (1) and is located in front of the sliding frame (53). One end of the third hydraulic cylinder (56) is fixedly arranged on the cylinder frame (55), and the telescopic end of the third hydraulic cylinder (56) is connected to one end of the rack (54); The mold-forming structure (6) includes a pair of electric slide rails (61), a pair of machine frames (62), a pair of motors (63), a pair of second shaft rods (64), two pairs of first templates (65), two pairs of second templates (66), two pairs of fixing bolts (67), an embedded frame (68), and a pressing-down frame (69); A pair of the electric slide rails (61) are respectively fixedly arranged on the lower walls at the left and right ends of the base (1). The electric slide rails (61) are located at the rear side of the moving groove (8). A pair of the frames (62) are respectively fixedly arranged on the electric slide rails (61) and move left and right. The top ends of the frames (62) are movably inserted into the moving groove (8). A pair of the motors (63) are respectively fixedly arranged in the middle of the inner lower walls of the frames (62). One ends of a pair of the second shaft rods (64) respectively movably penetrate through the middle of the top ends of the frames (62), and the other ends of the second shaft rods (64) are respectively connected to the driving ends of the motors (63). Two pairs of the first templates (65) are both convex, and sockets (10) are symmetrically arranged in the middle of one ends. The middle parts of the lower walls of two pairs of the first templates (65) are respectively fixedly sleeved on the top ends of the first shaft rods (51) and one ends of the second shaft rods (64), and the first templates (65) are respectively parallel to the four sides of the base (1). Among them, the lengths of the first templates (65) at the front and rear ends are less than the lengths of the first templates (65) at the left and right ends. The two ends of two pairs of the first templates (65) are respectively relatively and fittingly connected. One ends of two pairs of the second templates (66) are respectively movably inserted into the sockets (10) of the first templates (65). The other ends of two pairs of the second templates (66) are both arc-shaped structures with the same diameter. Two pairs of the fixing bolts (67) are respectively movably screwed into the middle parts of the first templates (65) and press against one ends of the second templates (66). The embedded frame (68) is rectangular and five insertion posts (11) are arranged on the lower wall. The embedded frame (68) is detachably arranged in the middle of the upper wall of the base (1) and the insertion posts (11) are movably inserted into the jacking holes (9). The embedded frame (68) is located inside two pairs of the first templates (65). The pressing-down frame (69) is a rectangular frame. The pressing-down frame (69) is detachably arranged on the lower wall of the rectangular pressing plate (73) and fixed by bolts; The pressing-down structure (7) includes a gantry (71), a pair of fourth hydraulic cylinders (72), a rectangular pressing plate (73), a pair of fifth hydraulic cylinders (74), a cross plate (75) and a pressing column (76); Two ends of the gantry (71) are respectively fixedly arranged in the middle of the upper walls at the front and rear ends of the base (1). One ends of a pair of the fourth hydraulic cylinders (72) are respectively symmetrically arranged on the inner upper wall of the gantry (71). The rectangular pressing plate (73) is fixedly arranged between the telescopic ends of the fourth hydraulic cylinders (72), and the rectangular pressing plate (73) corresponds to the middle of the substrate. One ends of a pair of the fifth hydraulic cylinders (74) are respectively fixedly arranged on the upper wall of the rectangular pressing plate (73) and located at one pair of diagonal positions. The cross plate (75) is fixedly arranged between the telescopic ends of the fifth hydraulic cylinders (74). One end of the pressing column (76) movably penetrates between the rectangular pressing plates (73), and the other end of the pressing column (76) is fixedly connected to the middle of the cross plate (75).

2. The forming die machine for manhole cover processing according to claim 1, characterized in that: The limiting component (3) includes two pairs of first hydraulic cylinders (31) and two pairs of top claws (32); the two pairs of the first hydraulic cylinders (31) are respectively inclined and arranged on the upper wall of the base (1) and respectively correspond to the diagonals of the base (1). The two pairs of the top claws (32) are both L-shaped. The two pairs of the top claws (32) are respectively fixedly arranged on the telescopic ends of the first hydraulic cylinders (31), and the top claws (32) are symmetrical to each other.

3. The forming press for manhole cover processing according to claim 2, wherein: The jacking component (4) includes a support frame (41), a second hydraulic cylinder (42), a bracket (43) and five jacking columns (44); The support frame (41) is fixedly arranged in the middle of the lower wall of the base (1). One end of the second hydraulic cylinder (42) is fixedly arranged on the support frame (41). The middle of the bracket (43) is fixedly arranged on the telescopic end of the second hydraulic cylinder (42), and the bracket (43) is located below the base (1). One ends of the five jacking columns (44) are respectively fixedly arranged on the bracket (43), and the other ends of the jacking columns (44) respectively pass through the jacking holes (9) movably.

4. The forming die machine for manhole cover processing according to claim 3, wherein: One end of the pressing column (76) is located below the rectangular pressing plate (73) or the lower wall of the pressing column (76) is on the same horizontal plane as the lower wall of the rectangular pressing plate (73).

5. The forming die machine for manhole cover processing according to claim 4, characterized in that: A rectangular die groove is formed in the middle after the first templates (65) are butted against each other, or a circular die groove is formed in the middle after the second templates (66) are butted against each other.

6. The forming press for manhole cover processing according to claim 5, wherein: The top claws (32) are respectively attached to one ends of a pair of first templates (65) and are located at the corner parts.

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