A casting device for producing molds for seamless steel pipes

Abstract

The present invention relates to the technical field of casting, and in particular to a casting device for the production of molds for seamless steel pipes, comprising a cover plate, a positioning plate, a second cylinder, a third cylinder, a sand sleeve and a locking assembly; the cover plate is plugged into the upper sand box; the cover plate is connected to the positioning plate; a positioning hole is provided on the positioning plate; the positioning plate is slidably connected to the cylinder two; the cylinder three is fixedly connected to the cylinder two, and the cylinder three passes through the positioning hole. Through the cooperation of the cover plate and the positioning plate, the sand sleeve can be aligned with the riser by manually inserting the sand sleeve into the positioning hole, thus avoiding many problems caused by the misalignment of the sand sleeve with the riser. At the same time, the positioning plate used for positioning the sand sleeve is also used for blocking and limiting the cylinder two, thus avoiding the problem that the cylinder two and the cylinder three crush the sand mold block two due to the difficulty in controlling the direction of the force due to excessive force.

Description

Technical Field

[0001] The present invention relates to the technical field of casting, and more particularly to a casting device for producing a mold for a seamless steel pipe. Background Art

[0002] Seamless steel pipe is made by perforating a whole round steel bar, and there is no weld on the surface;

[0003] Metal molds are required in the production process of seamless steel pipes. When producing such metal molds, semi-finished molds are first made through a casting process, and then the semi-finished molds are processed by CNC machine tools to make metal molds;

[0004] When sand casting is performed on a metal mold, a pouring port and a riser need to be opened on the sand mold block, and a sand sleeve is bonded above the riser of the sand mold block. The pouring port and the riser are both connected to the cavity of the sand mold block. During casting, molten metal is first poured into the pouring port, and the molten metal flows into the cavity of the sand mold block through the pouring port, so that the gas in the cavity of the sand mold block is discharged from the riser, and then molten metal is poured into the sand sleeve, so that the riser is filled with molten metal. However, when the sand sleeve is manually bonded to the sand mold block, if the sand sleeve is not aligned with the riser of the sand mold block, the flow path of the molten metal will be blocked, causing turbulence, which will not only affect the shrinkage compensation efficiency of the molten metal, but may also aggravate the scouring of the sand mold by the molten metal, resulting in defects such as sand holes. Summary of the invention

[0005] In order to overcome the disadvantage that when the sand sleeve is manually bonded to the sand mold block, it is impossible to ensure that the risers of the sand sleeve and the sand mold block are completely aligned, the present invention provides a casting device for producing a mold for a seamless steel pipe.

[0006] The technical solution is as follows:

[0007] A casting device for the production of molds for seamless steel pipes, comprising a lower sand box, a cylinder one and an upper sand box; at least four cylinders one are fixedly connected to the lower sand box; the four cylinders one are commonly plugged into the upper sand box, and the upper sand box is in contact with the lower sand box; it also comprises a cover plate, a positioning plate, a cylinder two, a cylinder three, a sand sleeve and a locking assembly; the upper sand box is plugged with a cover plate; the cover plate is connected to the positioning plate; a positioning hole is provided on the positioning plate; the positioning plate is slidably connected with the cylinder two; the cylinder three is fixedly connected to the cylinder two through a connecting block, and the cylinder three passes through the positioning hole, and the center point of the cylinder three is aligned with the center point of the positioning hole; the cylinder two passes through the sand mold block two, and leaves a casting port on the sand mold block two; the cylinder three passes through the sand mold block two, and leaves a riser on the sand mold block two; the sand sleeve is plugged into the positioning plate, and the sand sleeve is located on the inner side of the positioning hole; the riser is aligned with the positioning hole; the cover plate is connected to the locking assembly, and the locking assembly is used to fix the cover plate on the upper sand box.

[0008] Furthermore, it is particularly preferred that at least two protrusions are provided on each of the lower flask and the upper flask.

[0009] In addition, it is particularly preferred that the locking assembly includes lock one and lock two; at least four locks one are fixedly connected to the upper sand box; at least four locks two are fixedly connected to the cover plate, and the locks two are engaged with the corresponding locks one.

[0010] In addition, it is particularly preferred that it also includes a splitting component; the splitting component is connected to the positioning plate; the splitting component includes a round rod, a shift block and a spring; the positioning plate is divided into two parts, front and rear, with the center point as the dividing line, and each part of the positioning plate is slidably connected to the cover plate; each part of the positioning plate is slidably connected to a round rod, and the round rod is plugged into the cover plate; each round rod is fixedly connected to a shift block, and the shift block is in contact with the positioning plate; each round rod is sleeved with a spring, one end of the spring is fixedly connected to the positioning plate, and the other end of the spring is fixedly connected to the corresponding shift block.

[0011] Furthermore, it is particularly preferred that the ends of the round rod are provided with chamfers.

[0012] In addition, it is particularly preferred that an auxiliary component is also included; the auxiliary component is connected to the positioning plate; the auxiliary component includes ring one, ring two and a fixing unit; ring one is inserted into the positioning plate; ring two is fixedly connected to ring one, and ring two is in contact with the positioning plate; the fixing unit is connected to the positioning plate, and the fixing unit is used to fix ring two.

[0013] In addition, it is particularly preferred that the fixing unit includes a fixing block and a latch; a fixing block is fixedly connected to each part of the positioning plate, and the fixing block is in contact with the second circular ring; each fixing block is slidably connected to a latch, and the latch is plugged into the second circular ring.

[0014] Furthermore, it is particularly preferred that the end of the latch pin is chamfered.

[0015] In addition, it is particularly preferred that a second shifting block is further included; each latch is fixedly connected to a second shifting block, and the second shifting block is in contact with the corresponding fixed block.

[0016] Furthermore, it is particularly preferred that the surfaces of the lower flask and the upper flask are coated with an anti-rust layer.

[0017] Beneficial effects of the present invention:

[0018] 1. Through the cooperation of the cover plate and the positioning plate, the sand sleeve can be aligned with the riser by inserting the sand sleeve into the positioning hole, thus avoiding many problems caused by the misalignment of the sand sleeve and the riser. At the same time, the position of the sand mold block 2 corresponding to the upper side of the cavity is limited by the cover plate to avoid the sand mold block 2 from bulging and deforming due to the casting of molten metal. At the same time, the positioning plate used to position the sand sleeve is also used to block and limit the cylinder 2, which can ensure that the end connected to the cylinder 2 and the cylinder 3 is ejected in a vertical state. After that, the human only needs to apply a relatively small pulling force to the ends of the cylinder 2 and the cylinder 3 to pull out the cylinder 2 and the cylinder 3, thus avoiding the problem that the cylinder 2 and the cylinder 3 crush the sand mold block 2 due to the difficulty in controlling the direction of the force due to excessive force;

[0019] Second, by dividing the positioning plate into two parts, the two parts of the positioning plate can be removed from the cover plate in a horizontal motion in opposite directions, thereby avoiding friction between the positioning plate and the sand sleeve, avoiding the sand sleeve from being pushed, and thus avoiding the problem of reduced bonding stability between the sand sleeve and the sand mold block 2 due to friction;

[0020] Third, the position of the positioning hole corresponding to the sand mold block 2 can be squeezed and limited by the circular ring 1, thereby avoiding the problem that the positioning plate presses and cracks the protrusion of the sand mold block 2, thereby avoiding interference with the sand sleeve bonding operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The schematic diagram of the structure of the casting equipment for producing the mold for seamless steel pipe of the present invention is shown;

[0022] Figure 2 An exploded view of a casting device for producing a mold for a seamless steel pipe according to the present invention is shown;

[0023] Figure 3 A schematic structural diagram of the locking assembly of the present invention is shown;

[0024] Figure 4 A schematic diagram of the structure of the split assembly of the present invention is shown;

[0025] Figure 5 Shows Figure 4 A local enlarged schematic diagram of the middle A;

[0026] Figure 6 A schematic diagram of the structure of the auxiliary component of the present invention is shown;

[0027] Figure 7 Shows Figure 6 A local enlarged schematic diagram of point B in the middle.

[0028] Meaning of the reference numerals in the figures:

[0029] 1-lower sand box, 2-cylinder one, 3-upper sand box, 4-cover plate, 5-positioning plate, 6-cylinder two, 7-cylinder three, 8-sand sleeve, 9-sand mold block one, 10-sand mold block two, 201-lock one, 202-lock two, 203-round rod, 204-shift block one, 205-spring, 206-ring one, 207-ring two, 208-fixed block, 209-latch, 2010-shift block two, 91-casting port, 92-riser, 93-positioning hole. DETAILED DESCRIPTION

[0030] Although the present invention may be described with respect to a particular application or industry, those skilled in the art will recognize the broader applicability of the present invention. Those of ordinary skill in the art will recognize that terms such as above, below, upward, downward, etc. are used to describe the drawings and do not represent limitations on the scope of the present invention as defined by the appended claims. Any numerical designations such as first or second are merely exemplary and are not intended to limit the scope of the present invention in any way.

[0031] Example 1

[0032] A casting device for producing a mold for a seamless steel pipe, such as Figure 1-Figure 4 As shown, it includes a lower sand box 1, a cylinder 2 and an upper sand box 3; four cylinders 2 are welded on the lower sand box 1, and the cylinder 2 is set to an alloy material; the four cylinders 2 are commonly plugged into the upper sand box 3, and the upper sand box 3 is in contact with the lower sand box 1; it also includes a cover plate 4, a positioning plate 5, a cylinder 2 6, a cylinder 3 7, a sand sleeve 8 and a locking assembly; the upper sand box 3 is plugged with a cover plate 4; the cover plate 4 is connected to the positioning plate 5; the positioning plate 5 is provided with a positioning hole 93; the positioning plate 5 is slidably connected to the cylinder 2 6; the cylinder 2 6 is connected by a connection The block is fixed with cylinder three 7, and cylinder three 7 passes through the positioning hole 93, and the center point of cylinder three 7 is aligned with the center point of the positioning hole 93; cylinder two 6 passes through the sand mold block two 10, and leaves a casting port 91 on the sand mold block two 10; cylinder three 7 passes through the sand mold block two 10, and leaves a riser 92 on the sand mold block two 10; a sand sleeve 8 is inserted into the positioning plate 5, and the sand sleeve 8 is located on the inner side of the positioning hole 93; the riser 92 is aligned with the positioning hole 93; a locking assembly is connected to the cover plate 4, and the locking assembly is used to fix the cover plate 4 on the upper sand box 3.

[0033] At least two protrusions are provided on the lower flask 1 and the upper flask 3, so that it is easier to lift and turn the lower flask 1 and the upper flask 3 manually.

[0034] The locking assembly includes a lock 1 201 and a lock 2 202; four locks 1 201 are bolted to the upper sand box 3; four locks 202 are bolted to the cover plate 4, and the locks 2 202 are engaged with the corresponding locks 1 201 to lock the cover plate 4 to the upper sand box 3.

[0035] First, manually unlock lock 1 201 and lock 2 202, then remove the cover plate 4 and the parts thereon from the upper sand box 3, and then drive the upper sand box 3 to move upward, so that the upper sand box 3 is away from the lower sand box 1 and the cylinder 1 2, so as to remove the upper sand box 3, and then manually pour sand into the lower sand box 1 and press it, and then put the cavity mold above the sand layer in the lower sand box 1, and spray talcum powder on the cavity mold. At this time, the upper half of the cavity mold exceeds the upper opening of the lower sand box 1, and then continue to pour sand into the lower sand box 1 and press it to obtain a sand mold block 9, and then spray talcum powder on the side of the cavity mold and the sand mold block 9. At this time, the lower half of the cavity mold is buried The sand mold block 1 is inserted into the sand mold block 1 9, and then the upper sand box 3 is manually re-fixed on the lower sand box 1, and then the cylinder 2 6 and the cylinder 3 7 are placed on the upper side of the sand mold block 1 9, and the cylinder 2 6 and the cylinder 3 7 are stabilized by another person, and then sand is poured into the upper sand box 3 and pressed to obtain the sand mold block 2 10, the casting port 91 and the riser 92. The position of the connecting block between the cylinder 2 6 and the cylinder 3 7 on the sand mold block 2 10 is formed with a flow channel, and then the cover plate 4 and the parts thereon are manually installed back on the upper sand box 3, and the lock 2 202 is re-fastened on the lock 1 201, so that the cover plate 4 and the parts thereon are locked on the upper sand box 3. At this time, the installation is completed as shown in the figure. Figure 1As shown, the upper sand box 3 is then manually taken out upward, and the upper sand box 3 drives the sand mold block 2 10 to move upward by friction. Since the contact positions of the cavity mold, the sand mold block 1 9 and the sand mold block 2 10 are all sandblasted with talcum powder, after the sand mold block 2 10 is away from the sand mold block 1 9 and the cavity mold, the cavity mold is still located in the sand mold block 1 9. Then the upper sand box 3 is manually turned over 180 degrees, so that the connecting block between the cylinder 2 6 and the cylinder 3 7 moves upward, and then the turned cylinder 2 6 and the cylinder 3 7 are pulled upward to move the cylinder 2 6 and the cylinder 3 7 toward the far The upper sand box 3 is turned back to its original position, and then the upper sand box 3 is re-fixed on the lower sand box 1. At this time, the sand block 1 9 is in contact with the sand block 2 10, and a cavity is formed between the sand block 1 9 and the sand block 2 10. The cavity, the casting port 91, the riser 92 and the runner are interconnected. Then, an adhesive is applied to the lower side of the sand sleeve 8, and the sand sleeve 8 is inserted into the positioning hole 93 of the positioning plate 5, so that the sand sleeve 8 is bonded to the sand block 2 10. Since the center of the positioning hole 93 is The center point of the sand sleeve 8 is aligned with the center point of the riser 92, so that the center point of the sand sleeve 8 is aligned with the center point of the riser 92, and then the counterweight is manually placed on the cover plate 4, the upper sand box 3 is pressed tightly on the lower sand box 1, and then the positioning plate 5 is taken out to avoid casting the molten metal on the positioning plate 5 and damaging it, and then the molten metal is poured into the casting port 91, and the molten metal flows into the mold cavity through the casting port 91 and the runner, and the air in the mold cavity is discharged from the runner, the riser 92 and the sand sleeve 8, and then the molten metal is poured into the sand sleeve 8, so that the molten metal completely fills the riser 92, and the casting operation is completed. During the process, the cover plate 4 is used to limit the position of the sand mold block 10 corresponding to the upper side of the mold cavity to prevent the sand mold block 10 from bulging and deforming due to the casting of molten metal. When in use, the cover plate 4 and the positioning plate 5 are coordinated so that the sand sleeve 8 can be aligned with the riser 92 by manually inserting the sand sleeve 8 into the positioning hole 93, thereby avoiding many problems caused by the misalignment of the sand sleeve 8 and the riser 92. At the same time, the cover plate 4 is used to limit the position of the sand mold block 10 corresponding to the upper side of the mold cavity to prevent the sand mold block 10 from bulging and deforming due to the casting of molten metal.

[0036] When manually pulling out the cylinder 2 6 and the cylinder 3 7, in the initial stage of the pulling out operation, since the cylinder 2 6 and the cylinder 3 7 are tightly pressed in the sand mold block 2 10, a relatively large force needs to be applied manually to pull the cylinder 2 6 and the cylinder 3 7. When the force applied manually is too large, it is difficult to ensure that the pulling force acting on the cylinder 2 6 and the cylinder 3 7 is completely upward. If the cylinder 2 6 and the cylinder 3 7 are pulled out at an angle, the cylinder 2 6 and the cylinder 3 7 will squeeze and deform the sand mold block 2 10, causing damage to the sand mold. The structural stability of the sand mold block 2 10 is affected. Therefore, after the upper sand box 3 is taken out manually, the upper sand box 3 is turned upside down on the ground. During this process, the cylinder 2 6 and the cylinder 3 7 touch the ground before the cover plate 4, so that the ground pushes the end of the cylinder 2 6 and the cylinder 3 7 connected to the sand mold block 2 10 out. At this time, the connection between the cylinder 2 6 and the cylinder 3 7 and the sand mold block 2 10 is loose. Manually, only a relatively small pulling force is applied to the end of the cylinder 2 6 and the cylinder 3 7 connected to the sand mold block 2 The second cylinder 6 and the third cylinder 7 are pulled out, avoiding the problem of difficulty in controlling the direction of the force due to excessive force, thereby avoiding crushing the sand mold block 2 10. In this process, since the positioning plate 5 and the second cylinder 6 are slidably connected, that is, the positioning plate 5 blocks and limits the second cylinder 6, and the second cylinder 6 and the third cylinder 7 are fixed together by the connecting block, the second cylinder 6 and the third cylinder 7 can only move in the vertical direction, which can prevent the ground from pushing the end of the second cylinder 6 and the third cylinder 7 connected to the sand mold block 2 10 out. When the sand mold block 2 10 is crushed, the positioning plate 5 for positioning the sand sleeve 8 is also used to block and limit the cylinder 2 6, which can ensure that the end connected to the cylinder 2 6 and the cylinder 3 7 is ejected in a vertical state. After that, only a relatively small pulling force needs to be applied to the ends of the cylinder 2 6 and the cylinder 3 7 to pull out the cylinder 2 6 and the cylinder 3 7, thereby avoiding the problem of the cylinder 2 6 and the cylinder 3 7 crushing the sand mold block 2 10 due to the difficulty in controlling the direction of the force applied due to excessive force.

[0037] Example 2

[0038] On the basis of Example 1, Figure 4 and Figure 5 As shown, it also includes a split component; the positioning plate 5 is connected to the split component; the split component includes a round rod 203, a shift block 204 and a spring 205; the positioning plate 5 is divided into a front and a rear part with the center point as the dividing line, and each part of the positioning plate 5 is slidably connected to the cover plate 4; each part of the positioning plate 5 is slidably connected to a round rod 203, the round rod 203 is plugged into the cover plate 4, and the positioning plate 5 is fixed to the cover plate 4 through the round rod 203; each round rod 203 is bolted with a shift block 204, and the shift block 204 is in contact with the positioning plate 5; each round rod 203 is sleeved with a spring 205, one end of the spring 205 is fixedly connected to the positioning plate 5, and the other end of the spring 205 is fixedly connected to the corresponding shift block 204, and the spring 205 is set to an alloy material.

[0039] The end of the round rod 203 is chamfered to make it easier for the round rod 203 to be inserted into the cover plate 4 .

[0040] In order to avoid damage to the positioning plate 5 due to the molten metal being cast on it during the casting process, the positioning plate 5 should be taken out before casting. During this process, if the positioning plate 5 is taken out by moving upward, the positioning plate 5 will slide upward on the surface of the sand sleeve 8, and the friction force generated will act on the sand sleeve 8. In addition, when the positioning plate 5 is taken out by moving upward, if the hand shakes manually, the positioning plate 5 will push the sand sleeve 8, thereby affecting the bonding stability between the sand sleeve 8 and the sand mold block 2 10. Therefore, the positioning plate 5 is divided into two parts, front and rear, and the positioning plate 5 is fixed to the cover plate 4 by a round rod 203. After the sand sleeve 8 is bonded, the shift block 1 204 is manually pulled to move. The spring 205 is stretched by a pair of 204, and the shift block 204 drives the round rod 203 to move, so that the round rod 203 is away from the cover plate 4, and then the two parts of the positioning plates 5 are manually pulled to move away from each other, and the positioning plates 5 are removed from the cover plate 4. During this process, no friction will be generated between the positioning plates 5 and the sand sleeve 8, and the sand sleeve 8 will not be pushed. When in use, the positioning plates 5 are divided into two parts, the front and rear parts, so that the two parts of the positioning plates 5 are removed from the cover plate 4 in a manner of moving horizontally away from each other, thereby avoiding the generation of friction between the positioning plates 5 and the sand sleeve 8, avoiding the pushing of the sand sleeve 8, and thus avoiding the problem of reduced bonding stability between the sand sleeve 8 and the sand mold block 10 due to the generation of friction.

[0041] Example 3

[0042] On the basis of Example 2, Figure 6 and Figure 7 As shown, it also includes an auxiliary component; the auxiliary component is connected to the positioning plate 5; the auxiliary component includes a ring 1 206, a ring 207 and a fixing unit; the ring 1 206 is inserted into the positioning plate 5; the ring 2 207 is welded on the ring 1 206, and the ring 2 207 is in contact with the positioning plate 5; the fixing unit is connected to the positioning plate 5, and the fixing unit is used to fix the ring 2 207.

[0043] The fixing unit includes a fixing block 208 and a latch 209; a fixing block 208 is welded on each part of the positioning plate 5, the fixing block 208 is in contact with the circular ring 207, and the fixing block 208 is set to an alloy material; each fixing block 208 is slidably connected with a latch 209, the latch 209 is plugged into the circular ring 207, and the circular ring 1 206 and the circular ring 2 207 are fixed by the latch 209.

[0044] The end of the latch pin 209 is chamfered to make it easier for the latch pin 209 to be inserted into the second ring 207 .

[0045] It also includes a second shift block 2010; each latch 209 is fixedly connected with a second shift block 2010, and the second shift block 2010 is in contact with the corresponding fixed block 208, so that the latch 209 can be driven to move by the second shift block 2010.

[0046] The surfaces of the lower flask 1 and the upper flask 3 are coated with an anti-rust layer for preventing rust.

[0047] After the sand mold block 2 10 is obtained, the cover plate 4 and the positioning plate 5 are tightly covered on the upper sand box 3. In the process, if there is a bulge on the upper part of the sand mold block 2 10, and the bulge is higher than the upper opening of the upper sand box 3, the cover plate 4 and the positioning plate 5 can further compact the sand mold block 2 10. If the position of the bulge of the sand mold block 2 10 is just aligned with the edge of the positioning hole 93, when the positioning plate 5 squeezes the local position of the bulge, the bulge will crack, which interferes with the bonding operation of the sand sleeve 8. Therefore, before the cover plate 4 and the positioning plate 5 are tightly covered on the upper sand box 3, the ring 1 206 is manually inserted into the positioning hole 93, and the ring 1 206 and the ring 2 207 are fixed on the positioning plate 5 cover by the latch 209. The lower side of the ring 1 206 is just flush with the lower side of the positioning plate 5. The cover plate 4 and the positioning plate 5 are tightly covered on the upper sand box 3, the positioning plate 5 drives the circular ring 1 206 to contact the sand mold block 2 10 together, that is, the position of the sand mold block 2 10 corresponding to the positioning hole 93 can be squeezed and limited by the circular ring 1 206, avoiding the problem that the positioning plate 5 presses and cracks the protrusion of the sand mold block 2 10, thereby avoiding interference with the bonding operation of the sand sleeve 8. Before bonding the sand sleeve 8, the shifting block 2010 is manually moved, and the shifting block 2010 drives the latch 209 to slide in the fixed block 208, so that the latch 209 is away from the circular ring 207, and then the circular ring 1 206 and the circular ring 207 are manually taken out, and then the bonding operation is performed. When in use, the position of the sand mold block 2 10 corresponding to the positioning hole 93 can be squeezed and limited by the circular ring 1 206, thereby avoiding the problem that the positioning plate 5 presses and cracks the protrusion of the sand mold block 2 10, thereby avoiding interference with the bonding operation of the sand sleeve 8.

[0048] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A casting device for producing a mold for a seamless steel pipe, comprising a lower flask (1); at least four cylinders (2) are fixedly connected to the lower flask (1); an upper flask (3) is commonly inserted into the four cylinders (2), and the upper flask (3) is in contact with the lower flask (1); wherein: The upper sand box (3) is plugged with a cover plate (4); the cover plate (4) is connected with a positioning plate (5); a positioning hole (93) is formed on the positioning plate (5); a second cylinder (6) is slidably connected to the positioning plate (5); a third cylinder (7) is fixedly connected to the second cylinder (6) via a connecting block, and the third cylinder (7) passes through the positioning hole (93), and the center point of the third cylinder (7) is aligned with the center point of the positioning hole (93); the second cylinder (6) passes through the second sand mold block (10) , and leaving a casting port (91) on the sand mold block 2 (10); the cylinder 3 (7) passes through the sand mold block 2 (10) and leaves a riser (92) on the sand mold block 2 (10); a sand sleeve (8) is inserted into the positioning plate (5), and the sand sleeve (8) is located inside the positioning hole (93); the riser (92) is aligned with the positioning hole (93); a locking assembly is connected to the cover plate (4), and the locking assembly is used to fix the cover plate (4) on the upper sand box (3); The invention also comprises a splitting component; the splitting component is connected to the positioning plate (5); the splitting component comprises a round rod (203); the positioning plate (5) is divided into two parts, front and rear, with the center point as the dividing line, and each part of the positioning plate (5) is slidably connected to the cover plate (4); each part of the positioning plate (5) is slidably connected to a round rod (203), and the round rod (203) is plugged into the cover plate (4); each round rod (203) is fixedly connected to a shifting block (204), and the shifting block (204) is in contact with the positioning plate (5); each round rod (203) is sleeved with a spring (205), one end of the spring (205) is fixedly connected to the positioning plate (5), and the other end of the spring (205) is fixedly connected to the corresponding shifting block (204).

2. A casting device for producing a mold for a seamless steel pipe according to claim 1, characterized in that: At least two protrusions are provided on the lower flask (1) and the upper flask (3).

3. A casting device for producing a mold for a seamless steel pipe according to claim 1, characterized in that: The locking assembly comprises a lock 1 (201); at least four locks 1 (201) are fixedly connected to the upper sand box (3); at least four locks 2 (202) are fixedly connected to the cover plate (4), and the locks 2 (202) are buckled with the corresponding locks 1 (201).

4. A casting device for producing a mold for a seamless steel pipe according to claim 1, characterized in that: The end of the round rod (203) is provided with a chamfer.

5. A casting device for producing a mold for a seamless steel pipe according to claim 1, characterized in that: The auxiliary component is also included; the auxiliary component is connected to the positioning plate (5); the auxiliary component includes a first circular ring (206); the first circular ring (206) is plugged into the positioning plate (5); a second circular ring (207) is fixedly connected to the first circular ring (206), and the second circular ring (207) is in contact with the positioning plate (5); and a fixing unit is connected to the positioning plate (5), and the fixing unit is used to fix the second circular ring (207).

6. A casting device for producing a mold for a seamless steel pipe according to claim 5, characterized in that: The fixing unit comprises a fixing block (208); each part of the positioning plate (5) is fixedly connected with a fixing block (208), and the fixing block (208) is in contact with the second circular ring (207); each fixing block (208) is slidably connected with a latch (209), and the latch (209) is plugged into the second circular ring (207).

7. A casting device for producing a mold for a seamless steel pipe according to claim 6, characterized in that: The end of the latch pin (209) is provided with a chamfer.

8. A casting device for producing a mold for a seamless steel pipe according to claim 6, characterized in that: It also includes a second shifting block (2010); each latch (209) is fixedly connected to a second shifting block (2010), and the second shifting block (2010) is in contact with the corresponding fixed block (208).

9. A casting device for producing a mold for a seamless steel pipe according to any one of claims 1 to 8, characterized in that: The surfaces of the lower sand box (1) and the upper sand box (3) are both coated with an anti-rust layer.

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