A ductile iron pipe processing and forming die

Abstract

The present invention relates to the field of mold technology, and in particular to a ductile iron pipe processing and forming mold, comprising a mold body, a retaining ring is coaxially slidably installed in the inner hole of the mold body, a fixed cylinder is coaxially fixed on one side of the retaining ring, an annular groove is coaxially opened on the outer surface of the fixed cylinder, a driving ring is coaxially slidably installed in the annular groove, the driving ring is transmission-connected with a first driving unit, the first driving unit is used to drive the driving ring to rotate in the annular groove, and a plurality of friction devices are circumferentially fixed on the surface of the driving ring. The present invention can quickly complete the removal of paint from the surface of the inner hole of the mold by axially installing a retaining ring in the inner hole of the mold body, and circumferentially arranging a plurality of grinders that can perform circular motion on the fixed cylinder connected to the retaining ring, and each grinder has a self-cleaning function, which can automatically remove paint debris attached to the surface.

Description

Technical Field

[0001] The invention relates to the technical field of molds, in particular to a ductile iron pipe processing and forming mold. Background Art

[0002] One of the main production methods of existing ductile iron pipes is to use centrifugal casting. This production method requires the use of a centrifugal casting machine. Its working process is as follows: the forming mold is driven by a power head and rotates at high speed. First, a layer of paint is sprayed evenly on the surface of the inner hole of the forming mold (the paint has heat insulation and thermal insulation effects). After the paint is dried, molten iron is cast. Under the action of centrifugal force, the molten iron is evenly attached to the surface of the inner hole of the mold, and after cooling, a casting blank is formed. After the blank is removed from the mold, the residual paint on the surface of the inner hole of the mold must be cleaned before the next casting, otherwise the thickness of the paint layer will be uneven during the next spraying, and casting defects will occur during the next blank casting.

[0003] The existing method of removing paint from the inner hole of the mold is mainly to use a tool to extend into the inner hole of the mold, move along the central axis of the inner hole, and use a wire brush on the tool to clean the surface of the inner hole of the mold. The reason why the inner hole surface of the mold is mainly cleaned with a wire brush is mainly because using a grinding wheel or other high-speed grinding tools, if not properly controlled, is prone to over-grinding, causing the shape of the inner hole of the mold to be damaged, affecting the subsequent molding effect. However, this results in low efficiency when using a wire brush for cleaning, and the hair bundles on the surface of the wire brush are easily accumulated during the grinding process. The paint debris polished off is easily accumulated on the hair bundles, resulting in a decrease in the cleaning effect of the wire brush. At the same time, during the long-term friction process, the single part of the wire brush rubs against the surface of the inner hole of the mold for a long time, and is easily deformed due to the high temperature generated by the friction, resulting in a further decrease in the cleaning effect and service life of the wire brush. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art that the paint is removed by a wire brush, which is inefficient and easily leads to poor cleaning effect due to the adhesion of debris, and to propose a ductile iron pipe processing and forming mold.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A ductile iron pipe processing and forming mold is designed, comprising a mold body, a retaining ring is coaxially slidably installed in the inner hole of the mold body, a fixing cylinder is coaxially fixed on one side of the retaining ring, an annular groove is coaxially opened on the outer surface of the fixing cylinder, a driving ring is coaxially slidably installed in the annular groove, the driving ring is transmission-connected with a first driving unit, the first driving unit is used to drive the driving ring to rotate in the annular groove, and a plurality of friction devices are fixed on the surface of the driving ring along the circumferential direction;

[0007] The friction device includes two limit plates, a rotating cylinder, a sleeve, a friction ring, an elastic pawl, and an inner ratchet tooth groove. A rotating cylinder is coaxially arranged between the two limit plates. A sleeve is coaxially rotatably connected to each of the two ends of the rotating cylinder. The sleeves are fixedly connected to the corresponding limit plates. The outer diameter of the sleeve is larger than the outer diameter of the rotating cylinder. A friction ring is coaxially sleeved between the two sleeves. A plurality of elastic pawls are circumferentially fixed to the outer surface of the rotating cylinder between the two sleeves. A plurality of inner ratchet tooth grooves corresponding to the elastic pawls are circumferentially formed on the inner surface of the friction ring. The rotating cylinder is transmission-connected to a driving unit, and the driving unit is used to drive the rotating cylinder to perform reciprocating rotational motion.

[0008] Preferably, the driving unit includes a rotor, a cylindrical cavity, an oblique exhaust hole, a counterweight magnet, and an inflation module. A rotor is coaxially placed in the rotating drum, and both ends of the rotor are coaxially rotatably connected to two limit plates respectively. The rotor is cylindrical, and a cylindrical cavity is coaxially opened in the rotor. A plurality of oblique exhaust holes are opened circumferentially through the surface of the rotor. The rotating drum is made of ferromagnetic material, and a counterweight magnet is embedded and fixed on the surface of the rotor to make the rotor eccentric. The counterweight magnet and the rotating drum attract each other, and the inflation module is connected to the cylindrical cavity, and the inflation module is used to inflate the cylindrical cavity.

[0009] Preferably, the inflation module includes an annular cavity, a first air hole, a second air hole, a connecting pipe, a transverse tube, and a conduit. An annular cavity corresponding to the annular groove is coaxially opened on the fixed cylinder, a plurality of first air holes connected to the annular cavity are circumferentially opened on the inner wall of the annular groove, a plurality of second air holes are circumferentially opened on the surface of the drive ring, the first air holes and the second air holes are arranged one by one, a connecting pipe is fixedly connected to the first air hole, a transverse tube connected to the interior of the connecting pipe is fixedly connected to the connecting pipe, the transverse tube is coaxially fixedly connected to the adjacent limit plate, a conduit connected to the interior of the rotor is coaxially fixedly fixed near one end of the transverse tube, and the conduit is connected to the transverse tube.

[0010] Preferably, the friction ring comprises a ring body and a steel wire bundle, a plurality of steel wire bundles are fixed to the outer surface of the ring body along the circumferential direction, a second air outlet hole is formed through the surface of the ring body, and a plurality of air holes are formed through the surface of the rotating drum and the ring body.

[0011] Preferably, the first driving unit comprises a gear ring, which is coaxially fixedly connected to the driving ring, a gear meshing with the gear ring is provided on one side of the gear ring, and the gear is transmission-connected to a motor.

[0012] Preferably, a plurality of slots are circumferentially penetrated on one side of the retaining ring close to the fixing tube, and a positioning column is inserted into each of the slots, and the positioning column is fixedly connected to the mold body.

[0013] The ductile iron pipe processing and forming die proposed by the present invention has the following beneficial effects:

[0014] A retaining ring is installed in the inner hole of the mold body in an axially sliding manner, and a plurality of grinders capable of performing circular motion are arranged in the circumferential direction on a fixed cylinder connected to the retaining ring, so that the paint on the surface of the inner hole of the mold can be quickly removed;

[0015] Each grinder is provided with a rotor driven by airflow. The rotor can drive the friction ring on the surface of the grinder to continuously change the extrusion position with the inner hole surface of the mold by means of magnetic attraction, thereby avoiding the high temperature generated by long-term contact with a single position. After the rotor is ejected from the airflow, it can also be ejected from the inside of the grinder to the outside, thereby blowing out the paint attached to the steel wire hair bundle on the surface of the friction ring with the help of the ejected airflow, reducing the amount of paint attached.

[0016] In addition, due to the driving method between the rotor and the friction ring, the inner ratchet teeth are used in conjunction with the elastic pawl for driving, and the rotor is eccentrically designed, so that the rotor can be reset in the opposite direction after rotation, so that the elastic pawl can reciprocate with the inner ratchet teeth on the rotating drum to generate high-frequency vibration, so that the entire friction device also vibrates, further shaking off the paint on the surface of the steel wire bundle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a ductile iron pipe processing and forming mold proposed by the present invention;

[0018] Figure 2 Schematic diagram of the retaining ring and fixing cylinder structure of a ductile iron pipe processing and forming mold proposed by the present invention Figure 1 ;

[0019] Figure 3 Schematic diagram of the retaining ring and fixing cylinder structure of a ductile iron pipe processing and forming mold proposed by the present invention Figure 2 ;

[0020] Figure 4 A schematic diagram of the friction structure of a ductile iron pipe processing and forming mold proposed by the present invention Figure 1 ;

[0021] Figure 5 A schematic diagram of the friction structure of a ductile iron pipe processing and forming mold proposed by the present invention Figure 2 ;

[0022] Figure 6 A schematic diagram of the rotor position structure of a ductile iron pipe processing and forming die proposed by the present invention;

[0023] Figure 7 A schematic cross-sectional view of the friction device of a ductile iron pipe processing and forming mold proposed by the present invention Figure 1 ;

[0024] Figure 8 A schematic cross-sectional view of the friction device of a ductile iron pipe processing and forming mold proposed by the present invention Figure 2 ;

[0025] Fig. 9 for Figure 8 Schematic diagram of the local structure at B;

[0026] Fig.10 This is a schematic cross-sectional structure diagram of a fixed cylinder of a ductile iron pipe processing and forming mold proposed by the present invention;

[0027] Fig.11 for Fig. 9 Schematic diagram of the local structure at point A.

[0028] In the figure: 1. mold body; 2. retaining ring; 3. fixing cylinder; 4. annular groove; 5. driving ring; 6. friction device; 61. limiting plate; 62. rotating cylinder; 63. sleeve; 64. friction ring; 6401. ring body; 6402. wire bundle; 65. elastic pawl; 66. inner ratchet tooth groove; 67. rotor; 68. columnar cavity; 69. oblique exhaust hole; 610. counterweight magnetic block; 611. annular cavity; 612. first air hole; 613. second air hole; 614. connecting pipe; 615. transverse pipe; 616. conduit; 7. gear ring. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] Example 1: Reference Figure 1-3 A ductile iron pipe processing and forming mold comprises a mold body 1, a retaining ring 2 is coaxially slidably installed in the inner hole of the mold body 1, the retaining ring 2 is used to prevent molten iron from flowing out of the mold body 1, a fixed cylinder 3 is coaxially fixed to one side of the retaining ring 2, an annular groove 4 is coaxially opened on the outer surface of the fixed cylinder 3, a driving ring 5 is coaxially slidably installed in the annular groove 4, the driving ring 5 is transmission-connected with a first driving unit, the first driving unit is used to drive the driving ring 5 to rotate in the annular groove 4, and a plurality of friction devices 6 are circumferentially fixed on the surface of the driving ring 5; a sealing structure can be provided on the retaining ring 2 to prevent the leakage of molten iron. The first driving unit comprises a gear ring 7, the gear ring 7 is coaxially fixedly connected to the driving ring 5, a gear meshing with the gear ring 7 is provided on one side of the gear ring 7, and a motor is transmission-connected with the gear.

[0031] The friction device 6 includes two limit plates 61, a rotating cylinder 62, a sleeve 63, a friction ring 64, an elastic pawl 65, and an inner ratchet tooth groove 66. The rotating cylinder 62 is coaxially arranged between the two limit plates 61. The two ends of the rotating cylinder 62 are respectively coaxially rotatably connected with a sleeve 63. The sleeves 63 are fixedly connected to the corresponding limit plates 61. The outer diameter of the sleeve 63 is larger than the outer diameter of the rotating cylinder 62, so that a gap can be left between the outer wall of the rotating cylinder 62 between the two sleeves 63 and the inner wall of the friction ring 64, so that the elastic pawl 65 on the surface of the rotating cylinder 62 can have a layout space. At the same time, the gap can gather the airflow sprayed from the rotating cylinder 62, so that the air holes on the friction ring 64 do not need to be aligned with the air holes on the rotating cylinder 62, and the gas sprayed thereon can be received. A friction ring 64 is coaxially sleeved between the two sleeves 63, a plurality of elastic pawls 65 are fixed along the circumferential direction on the outer surface of the rotating cylinder 62 between the two sleeves 63, a plurality of inner ratchet tooth grooves 66 corresponding to the elastic pawls 65 are opened along the circumferential direction on the inner surface of the friction ring 64, and the rotating cylinder 62 is connected to the second driving unit for driving the rotating cylinder 62 to perform reciprocating rotation. The elastic pawl 65 is made of thin sheet metal with good toughness. The transmission between the rotating cylinder 62 and the friction ring 64 is realized in the form of transmission between the elastic pawl 65 and the inner ratchet tooth groove 66, in order to utilize the principle that the elastic pawl 65 will be repeatedly squeezed and bounced by the inner ratchet tooth groove 66 when rotating in the reverse direction, so as to utilize the elastic pawl 65 to generate vibration, and then utilize the vibration to vibrate the entire friction device 6 to shake off the paint remaining on it.

[0032] A plurality of slots are also provided along the circumferential direction on the side of the retaining ring 2 close to the fixing cylinder 3, and a positioning column is inserted in each slot, and the positioning column is fixedly connected to the mold body. The slot is arranged parallel to the central axis of the inner hole of the mold, and the retaining ring is limited on the inner wall of the mold body by arranging the slot and the positioning column, so that when the mold body rotates at a high speed, the retaining ring can rotate synchronously with the mold body without lateral displacement.

[0033] Example 2: Reference Figure 3-11As another preferred embodiment of the present invention, the difference from the embodiment 1 is that the second driving unit includes a rotor 67, a columnar cavity 68, an oblique exhaust hole 69, a counterweight magnetic block 610, and an inflatable module. A rotor 67 is coaxially placed in the rotating drum 62, and the two ends of the rotor 67 are respectively connected to the two limit plates 61 coaxially for rotation. The rotor 67 is cylindrical, and a columnar cavity 68 is coaxially opened in the rotor 67. A plurality of oblique exhaust holes 69 are opened on the surface of the rotor 67 along the circumferential direction. The rotating drum 62 is made of iron. Made of magnetic material, a counterweight magnet 610 is embedded and fixed on the surface of the rotor 67. The counterweight magnet 610 and the drum 62 attract each other to make the rotor 67 eccentric. The counterweight magnet 610 can make the weight of the lower half of the rotor 67 greater than the mass of the upper half. In this way, when the rotor 67 rotates to the end and its counterweight magnet 610 is in the upper half of the rotor 67, the rotor 67 will automatically flip under the action of gravity to make the counterweight magnet 610 rotate to the lower half again. The inflation module is connected to the columnar cavity 68, and the inflation module is used to inflate the columnar cavity 68 so that when the gas is discharged through the oblique exhaust hole 69 on the surface of the rotor 67, the rotor 67 can be driven to rotate.

[0034] The inflatable module includes an annular cavity 611, a first air hole 612, a second air hole 613, a connecting pipe 614, a transverse pipe 615, and a conduit 616. The fixed cylinder 3 is coaxially provided with an annular cavity 611 corresponding to the annular groove 4. The inner wall of the annular groove 4 is circumferentially provided with a plurality of first air holes 612 connected to the annular cavity 611. The surface of the driving ring 5 is circumferentially provided with a plurality of second air holes 613. The first air holes 612 and the second air holes 613 are arranged one by one. A connecting pipe 614 is fixedly connected to the first air hole 612. A transverse pipe 615 connected to the inside of the connecting pipe 614 is fixedly connected to the connecting pipe 614. The transverse pipe 615 is coaxially fixedly connected to the adjacent limiting plate 61. A conduit 616 connected to the inside of the rotor 67 is coaxially fixedly connected to the rotor 67 near one end of the transverse pipe 615. The conduit 616 is connected to the transverse pipe 615. When the inflatable module is in use, the high-pressure gas generated by the gas in the annular cavity 611 after being heated is used as the gas source. After the gas in the annular cavity 611 is completely ejected, the first driving unit only needs to be controlled to keep the first air hole 612 aligned with the second air hole 613 so that external gas can enter the annular cavity 611, thereby restoring the air pressure in the annular cavity 611 to a balance.

[0035] The friction ring 64 includes a ring body 6401 and a steel wire bundle 6402 . A plurality of steel wire bundles 6402 are fixed to the outer surface of the ring body 6401 along the circumferential direction. A plurality of air holes are formed through the surfaces of the rotating drum 62 and the ring body 6401 .

[0036] When the gas entering the rotor 67 is discharged, it still has a certain amount of energy. For this reason, a number of air holes are opened on the surface of the rotating drum 62 and the ring body 6401 to utilize the gas ejected from the rotor 67 to reversely impact the steel wire bundle 6402 on its surface from the inside of the friction device 6, thereby blowing out the paint on the steel wire bundle 6402 through the reverse airflow.

[0037] The overall workflow of the present invention is as follows:

[0038] When the mold body 1 completes the molding process of a cast iron pipe and needs to clean the residual paint in the inner hole of the mold body 1, the operator uses the hydraulic rod, electric push rod and other tools arranged in the workshop to reach into the inner hole of the mold body 1, and then pushes the retaining ring 2 and the fixing cylinder 3 to move slowly along the central axis along the inner hole of the mold body 1. During the movement, the operator starts the first driving unit, and the first driving unit drives the gear ring 7 to rotate, and the gear ring 7 drives the driving ring 5 to rotate in the annular groove 4;

[0039] During the rotation of the driving ring 5, on the one hand, it will drive the multiple friction devices 6 arranged thereon to rub against the inner hole of the mold body 1, thereby rubbing off the residual paint in the inner hole of the mold body 1; on the other hand, during the rotation of the driving ring 5, the second air hole 613 on the driving ring 5 is intermittently aligned with the first air hole 612 on the annular groove 4. Whenever the first air hole 612 is aligned with the second air hole 613, the internal gas of the annular cavity 611 expands due to heat during the casting process. The expanded gas will be sprayed into the connecting pipe 614 through the second air hole 613 and the first air hole 612, and then enter the cross pipe 615 through the connecting pipe 614, and then enter the columnar shape of the rotor 67 through the cross pipe 615 and the conduit 616. In the cavity 68, at this time, since the surface of the rotor 67 is provided with a plurality of oblique holes, when the gas is ejected from the oblique holes, an oblique force will be applied to the rotor 67, thereby driving the rotor 67 to rotate. The rotating rotor 67 will drive the drum 62 to rotate in the positive direction through the counterweight magnetic block 610 thereon. Since the outer surface of the drum 62 is provided with a plurality of elastic pawls 65, the elastic pawls 65 cooperate with the inner ratchet tooth grooves 66 provided on the inner wall of the friction ring 64 to drive the friction ring 64 to rotate. During the rotation of the friction ring 64, different parts of the friction ring 64 will contact the inner hole wall of the mold body 1, so as to avoid the problem that the friction ring 64 always rubs against the inner hole wall of the mold body 1 at one part, resulting in excessive paint remaining on its surface affecting the cleaning effect; In addition, since a plurality of air holes are provided on the rotating cylinder 62 of the friction ring 64, the gas ejected from the rotor 67 will also be ejected to the outside of the friction device 6 through the air holes. In this process, the ejected gas can blow out the paint remaining on the surface of the steel wire bundle 6402 on the surface of the friction ring 64, so that the friction ring 64 can be kept clean. Since the first air hole 612 and the second air hole 613 are aligned for a short time, less gas is filled into the rotor 67, and the rotation angle of the rotor 67 is small, usually not exceeding 90 degrees, and the counterweight magnetic block 610 at the bottom of the rotor 67 makes the mass of the bottom of the rotor 67 larger. When the first air hole 612 and the second air hole 613 are staggered and no gas enters the rotor 67, the rotor 67 is under the gravity. Under the action, it rotates in the reverse direction to reset the counterweight magnetic block 610. At this time, the rotating drum 62 rotates in the reverse direction synchronously with the rotor 67. During the reverse rotation, the elastic pawl 65 on the rotating drum 62 cannot mesh with the inner ratchet tooth groove 66 on the friction ring 64, and cannot drive the friction ring 64 to rotate. However, when the elastic pawl 65 passes through the inner ratchet tooth groove 66, the inner wall of the friction ring 64 is wavy due to the inner ratchet tooth groove 66. After the elastic pawl 65 is repeatedly squeezed by the wavy inner wall, it will continuously knock up and down the inner wall of the friction ring 64, causing the inner wall of the friction ring 64 to vibrate at a high frequency, and further transmit the vibration to the steel wire bundle 6402 on the friction ring 64, and the residual paint on the steel wire bundle 6402 is further removed by the vibration.

[0040] After the paint is removed, reset the drive ring, manually clean the inner holes of the mold that have not been cleaned, and finally use compressed air to blow out the paint that has been rubbed off from the inner holes of the mold.

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A ductile iron pipe processing and forming die, comprising a die body (1), characterized in that: A retaining ring (2) is coaxially slidably mounted in the inner hole of the mold body (1); a fixing cylinder (3) is coaxially fixed to one side of the retaining ring (2); an annular groove (4) is coaxially formed on the outer surface of the fixing cylinder (3); a driving ring (5) is coaxially slidably mounted in the annular groove (4); the driving ring (5) is transmission-connected to a first driving unit; and a plurality of friction devices (6) are fixed to the surface of the driving ring (5) along the circumferential direction; The friction device (6) comprises two limiting plates (61), a rotating cylinder (62), a sleeve (63), a friction ring (64), an elastic pawl (65), and an inner ratchet tooth groove (66). A rotating cylinder (62) is coaxially arranged between the two limiting plates (61). Two ends of the rotating cylinder (62) are respectively coaxially rotatably connected with a sleeve (63). The sleeves (63) are fixed on the corresponding limiting plates (61). The outer diameter of the sleeve (63) is larger than the outer diameter of the rotating cylinder (62). A friction ring (64) is coaxially sleeved between the two sleeves (63). A plurality of elastic pawls (65) are fixed to the outer surface of the rotating cylinder (62) between the two sleeves (63) along the circumferential direction. A plurality of inner ratchet tooth grooves (66) corresponding to the elastic pawls (65) are formed on the inner surface of the friction ring (64) along the circumferential direction. The rotating cylinder (62) is drivingly connected with a second driving unit. The second driving unit is used to drive the rotating cylinder (62) to perform reciprocating rotational motion. The second driving unit comprises a rotor (67), a columnar cavity (68), an oblique exhaust hole (69), a counterweight magnetic block (610), and an inflation module. A rotor (67) is coaxially placed in the rotating cylinder (62). Two ends of the rotor (67) are respectively connected to two limit plates (61) for coaxial rotation. The rotor (67) is cylindrical. A columnar cavity (68) is coaxially opened in the rotor (67). A plurality of oblique exhaust holes (69) are opened on the surface of the rotor (67) along the circumferential direction. The rotating cylinder (62) is made of ferromagnetic material. A counterweight magnetic block (610) is embedded and fixed on the surface of the rotor (67) so that the rotor (67) is eccentric. The counterweight magnetic block (610) and the rotating cylinder (62) attract each other. The inflation module is connected to the columnar cavity (68). The inflation module is used to inflate the columnar cavity (68).

2. The ductile iron pipe processing and forming mold according to claim 1, characterized in that: The inflation module comprises an annular cavity (611), a first air hole (612), a second air hole (613), a connecting pipe (614), a transverse pipe (615), and a guide tube (616); the fixing cylinder (3) is coaxially provided with an annular cavity (611) corresponding to the annular groove (4); the inner wall of the annular groove (4) is circumferentially provided with a plurality of first air holes (612) in communication with the annular cavity (611); the surface of the driving ring (5) is circumferentially provided with a plurality of second air holes (613); The first air holes (612) and the second air holes (613) are arranged in a one-to-one correspondence; a connecting tube (614) is fixedly connected to the first air hole (612); a transverse tube (615) connected to the interior of the connecting tube (614) is fixedly connected to the connecting tube (614); the transverse tube (615) is coaxially fixedly connected to an adjacent limiting plate (61); a conduit (616) connected to the interior of the rotor (67) is coaxially fixedly connected to one end of the rotor (67) close to the transverse tube (615); the conduit (616) is connected to the transverse tube (615).

3. The ductile iron pipe processing and forming mold according to claim 1, characterized in that: The friction ring (64) comprises a ring body (6401) and a steel wire bundle (6402); a plurality of steel wire bundles (6402) are fixed to the outer surface of the ring body (6401) along the circumferential direction; and a plurality of air holes are provided through the surfaces of the rotating drum (62) and the ring body (6401).

4. The ductile iron pipe processing and forming mold according to claim 1, characterized in that: The first drive unit comprises a gear ring (7), the gear ring (7) being coaxially fixedly connected to the drive ring (5), a gear meshing with the gear ring (7) being provided on one side of the gear ring (7), and the gear transmission being connected to a motor.

5. The ductile iron pipe processing and forming mold according to claim 1, characterized in that: A plurality of slots are also provided along the circumferential direction on a side of the retaining ring (2) close to the fixing cylinder (3), and a positioning column is inserted into each of the slots. The positioning column is fixedly connected to the mold body (1).

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