Special steel casting device convenient to demould

Abstract

The invention discloses a special steel casting device convenient to demould, and belongs to the technical field of casting equipment, the special steel casting device convenient to demould comprises a bottom plate, the bottom plate is provided with a first splicing assembly and a second splicing assembly, by arranging the first splicing assembly and the second splicing assembly, splicing square plates can be quickly spliced and separated, and a closed casting cavity is formed or released; compared with the prior art, the demolding process is obviously simplified, the manual operation time is shortened, and therefore the casting efficiency is greatly improved, through the synergistic effect of the self-locking unit and the linkage unit, fixing between the splicing square plate and the position adjusting round frame is firmer, the leakproofness and stability of the casting cavity in the pouring and cooling process are guaranteed, and the casting quality is improved. The problem of looseness or leakage in the casting process is effectively prevented, the position adjusting round frame and the splicing square plate can be flexibly adjusted and replaced according to the size of special steel to be cast, the device can meet the casting requirements of various specifications, and the universality and practicability of the device are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of casting equipment, and in particular to a special steel casting device facilitating demolding. Background Art

[0002] In the field of special steel casting, traditional casting devices usually adopt a fixed mold structure, and the demolding process relies on manual operation or simple mechanical assistance, having problems such as low efficiency and high labor intensity. Especially when casting special steel with complex shapes or large sizes, the splicing and separation of the molds often require multiple adjustments, which not only consume time and effort but also easily lead to mold misalignment or leakage due to improper operation, affecting the quality of the castings. In addition, the versatility of traditional molds is poor, it is difficult to meet the production requirements of castings with different specifications, and when replacing the molds, disassembly and recombination are required, further increasing the production cycle and cost. Therefore, the present invention provides a special steel casting device facilitating demolding. Summary of the Invention

[0003] Aiming at the defects in the prior art, the present invention provides a special steel casting device facilitating demolding, overcoming the problems that the splicing and separation of the molds often require multiple adjustments and it is also difficult to meet the production requirements of castings with different specifications.

[0004] To achieve the above object, the present invention provides the following technical solution: A special steel casting device facilitating demolding, including a bottom plate, on which an upper support frame and a lower support frame are fixedly installed. On the bottom plate, a first splicing component and a second splicing component are provided. The first splicing component includes two symmetrically arranged adjustment circular frames slidably installed on the bottom plate. The second splicing component includes four adjustment rotating plates rotatably installed on the bottom plate in a circumferential array. On each adjustment rotating plate, an adjustment circular frame is slidably installed. On the end faces of the adjustment circular frames, splicing square plates are movably arranged. A closed casting chamber is formed by splicing between the six splicing square plates. A self-locking unit is provided between the splicing square plate and the corresponding adjustment circular frame, and the self-locking unit is used to fix the splicing square plate and the corresponding adjustment circular frame. A linkage unit is provided between the adjustment rotating plate and the corresponding adjustment circular frame, and the linkage unit is used to adjust the positions between the adjustment circular frame and the adjustment rotating plate.

[0005] Furthermore, the two adjustment circular frames in the first splicing component are respectively slidably installed on the upper support frame and the lower support frame. On each adjustment circular frame, an adjustment gear is fixedly installed. On the upper support frame and the lower support frame, an adjustment gear one is rotatably installed. The adjustment gear one and the corresponding adjustment gear mesh to form a gear-rack pair.

[0006] Further, annular limiting plates are fixedly arranged on the splicing square plates. The inner diameter of the annular limiting plates is equal to the outer diameter of the position-adjusting circular frame. Four limiting short columns are also fixedly arranged on the splicing square plates in a circumferential array. Four through holes cooperating with the limiting short columns are arranged on the position-adjusting circular frame in a circumferential array. The annular limiting plates and the limiting short columns are used for auxiliary positioning between the splicing square plates and the position-adjusting circular frame.

[0007] Each self-locking unit includes four fixed blocks and four sector-shaped strip plates. The four fixed blocks are fixedly installed on the splicing square plates in a circumferential array. Four linkage gears are rotatably installed on the position-adjusting circular frame in a circumferential array. The sector-shaped strip plates are fixedly installed on the sides of the corresponding linkage gears. Arc-shaped sliding grooves cooperating with the sector-shaped strip plates are arranged on the fixed blocks. The fixed blocks and the sector-shaped strip plates are used to fix the splicing square plates and the position-adjusting circular frame.

[0008] Further, a circular sliding plate is slidably installed on the position-adjusting circular frame. A spring is arranged between the circular sliding plate and the position-adjusting circular frame. A limiting circular plate is fixedly installed on the position-adjusting circular frame. The limiting circular plate is used to limit the position of the circular sliding plate. Four linkage racks are fixedly installed on the circular sliding plate in a circumferential array. The linkage racks and the corresponding linkage gears are engaged to form a gear-rack pair.

[0009] Further, four support plates one are fixedly installed on the bottom plate in a circumferential array. Four support plates two are fixedly installed on the bottom plate in a circumferential array. The support plates one and the support plates two are used to limit the rotation positions of the corresponding position-adjusting rotating plates.

[0010] Further, the linkage unit includes linkage belt pulleys. The linkage belt pulleys are rotatably connected to the corresponding position-adjusting rotating plates. A torsion spring is arranged between the linkage belt pulleys and the corresponding position-adjusting rotating plates. Position-adjusting gears two are rotatably installed on the position-adjusting rotating plates. The position-adjusting gears two and the corresponding position-adjusting gears are engaged to form a gear-rack pair. A transmission group is arranged between the linkage belt pulleys and the corresponding position-adjusting gears two. A gear group is arranged between the 4 linkage belt pulleys.

[0011] Further, L-shaped sliding plates are fixedly installed on the ends of the position-adjusting gears in the second splicing assembly that are farthest from the corresponding circular sliding plates. The L-shaped sliding plates are slidably matched with the position-adjusting rotating plates. When the L-shaped sliding plates are in contact with the corresponding support plates two, they are slidably matched. The L-shaped sliding plates are used to limit the positions between the corresponding position-adjusting rotating plates and the bottom plate.

[0012] Further, auxiliary pushing blocks are fixedly arranged on both the upper support frame and the lower support frame. Square slot holes for accommodating the movement of the auxiliary pushing blocks are arranged on the limiting circular plates in the first splicing assembly. Arc-shaped strip plates are fixedly installed on the support plates one. Arc-shaped slot holes for accommodating the movement of the arc-shaped strip plates are arranged on the limiting circular plates in the second splicing assembly. The auxiliary pushing blocks and the arc-shaped strip plates are respectively used to push the corresponding linkage gears to move.

[0013] The beneficial effects of the present invention compared with the prior art are as follows: (1) By setting the first splicing component and the second splicing component, the present invention can quickly splice and separate the splicing square plates to form or release a sealed casting chamber, significantly simplifying the demolding process and reducing the manual operation time, thereby greatly improving the casting efficiency. (2) Through the synergistic effect of the self-locking unit and the linkage unit, the fixation between the splicing square plate and the position-adjusting circular frame is made more firm, ensuring the tightness and stability of the casting chamber during pouring and cooling, and effectively preventing loosening or leakage problems during the casting process. (3) The position-adjusting circular frame and the splicing square plate in the present invention can be flexibly adjusted and replaced according to the size of the special steel to be cast, enabling the device to adapt to various specifications of casting requirements and improving the versatility and practicality of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 It is a schematic diagram of the structure of the first splicing component of the present invention.

[0016] Figure 3 It is Figure 2 a partial enlarged schematic diagram at A in

[0017] Figure 4 It is a schematic diagram of the structure of the second splicing component of the present invention.

[0018] Figure 5 It is a schematic diagram of the structure at the arc-shaped strip plate of the present invention.

[0019] Figure 6 It is Figure 5 a partial enlarged schematic diagram at B in

[0020] Figure 7 It is a schematic diagram of the structure at one place of the support plate of the present invention.

[0021] Figure 8 It is Figure 7 a partial enlarged schematic diagram at C in

[0022] Figure 9 It is a schematic diagram of the structure of the self-locking unit of the present invention.

[0023] Figure 10 It is a side view of the structure at the position-adjusting circular frame of the present invention.

[0024] Reference numerals: 101 - bottom plate; 102 - upper support frame; 103 - splicing square plate; 104 - liquid inlet pipe; 105 - lower support frame; 106 - linkage gear ring; 107 - annular limiting plate; 108 - limiting short column; 109 - fixing block; 110 - limiting circular plate; 111 - adjusting circular frame; 112 - adjusting gear; 113 - first adjusting gear; 114 - adjusting motor; 115 - auxiliary pushing block; 116 - square slot; 117 - driving gear; 118 - driving motor; 119 - driven gear; 120 - gear box; 121 - arc-shaped strip plate; 122 - first support plate; 123 - second support plate; 124 - arc-shaped slot; 125 - second adjusting gear; 126 - adjusting rotating plate; 127 - L-shaped sliding plate; 128 - linkage pulley; 129 - linkage belt; 130 - driven pulley; 131 - circular sliding plate; 132 - linkage gear; 133 - linkage rack; 134 - sector strip plate. Detailed implementation manners

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0026] Embodiment: Refer to Figures 1-10 , a special steel casting device convenient for demolding, including a bottom plate 101, an upper support frame 102 and a lower support frame 105 are fixedly installed on the bottom plate 101, a first splicing component and a second splicing component are arranged on the bottom plate 101, the first splicing component includes two symmetrically arranged adjusting circular frames 111 slidably installed on the bottom plate 101, the second splicing component includes four circumferentially arrayed adjusting rotating plates 126 rotatably installed on the bottom plate 101, the adjusting circular frames 111 are slidably installed on the adjusting rotating plates 126, splicing square plates 103 are movably arranged on the end faces of the adjusting circular frames 111, a closed casting chamber is formed by splicing between the six splicing square plates 103, and a self-locking unit is arranged between the splicing square plate 103 and the corresponding adjusting circular frame 111, and the self-locking unit is used to realize the fixation between the splicing square plate 103 and the corresponding adjusting circular frame 111.

[0027] The two adjusting circular frames 111 in the first splicing component are respectively slidably installed on the upper support frame 102 and the lower support frame 105, liquid inlet pipes 104 are symmetrically arranged on the splicing square plates 103 corresponding to the upper support frame 102, adjusting gears 112 are fixedly installed on the adjusting circular frames 111, first adjusting gears 113 are rotatably installed on the upper support frame 102 and the lower support frame 105, the first adjusting gears 113 and the corresponding adjusting gears 112 are meshed to form a gear-rack pair, adjusting motors 114 are fixedly installed on the upper support frame 102 and the lower support frame 105, the output shafts of the adjusting motors 114 are fixedly connected to the corresponding first adjusting gears 113, and the projections of the two splicing square plates 103 in the first splicing component on the lower surface of the bottom plate 101 coincide.

[0028] An annular limiting plate 107 is fixedly arranged on each splicing square plate 103. The inner diameter of the annular limiting plate 107 is equal to the outer diameter of the position-adjusting circular frame 111. Four limiting short columns 108 are also fixedly arranged on the splicing square plate 103 in a circumferential array. Four through holes cooperating with the limiting short columns 108 are arranged on the position-adjusting circular frame 111 in a circumferential array. The annular limiting plate 107 and the limiting short columns 108 are used for auxiliary positioning between the splicing square plate 103 and the position-adjusting circular frame 111.

[0029] Each self-locking unit includes four fixing blocks 109 and four sector-shaped strip plates 134. The four fixing blocks 109 are fixedly installed on the splicing square plate 103 in a circumferential array. Four linkage gears 132 are rotatably installed on the position-adjusting circular frame 111 in a circumferential array. The sector-shaped strip plates 134 are fixedly installed on the sides of the corresponding linkage gears 132. The circumferential directions of the sector-shaped strip plates 134 and the corresponding linkage gears 132 are the same. Arc-shaped sliding grooves cooperating with the sector-shaped strip plates 134 are arranged on the fixing blocks 109. The fixing blocks 109 and the sector-shaped strip plates 134 are used to fix between the splicing square plate 103 and the position-adjusting circular frame 111.

[0030] A circular sliding plate 131 is slidably installed on the position-adjusting circular frame 111. A spring is arranged between the circular sliding plate 131 and the position-adjusting circular frame 111. A limiting circular plate 110 is fixedly installed on the position-adjusting circular frame 111. The limiting circular plate 110 is used to limit the position of the circular sliding plate 131. Four linkage racks 133 are fixedly installed on the circular sliding plate 131 in a circumferential array. The linkage racks 133 and the corresponding linkage gears 132 are engaged to form a gear-rack pair.

[0031] In the initial position, the limiting short columns 108 and the corresponding through holes on the position-adjusting circular frame 111 are all engaged. At this time, the annular limiting plate 107 and the position-adjusting circular frame 111 are in an engaged state. The spring between the position-adjusting circular frame 111 and the circular sliding plate 131 is not compressed. At this time, the circular sliding plate 131 is located at the position closest to the limiting circular plate 110. Under the action of the linkage gear 132 and the linkage rack 133, at this time, the sector-shaped strip plate 134 and the arc-shaped sliding groove on the corresponding fixing block 109 are in an engaged state. Furthermore, under the action of the fixing block 109 and the sector-shaped strip plate 134, the position-adjusting circular frame 111 and the corresponding splicing square plate 103 are in a fixed state.

[0032] Four first support plates 122 are fixedly installed on the bottom plate 101 in a circumferential array. Four second support plates 123 are fixedly installed on the bottom plate 101 in a circumferential array. The first support plates 122 and the second support plates 123 are used to limit the rotation positions of the corresponding position-adjusting rotating plates 126.

[0033] A linkage unit is provided between the position-adjusting rotating plate 126 and the corresponding position-adjusting circular frame 111. The linkage unit is used to adjust the positions between the position-adjusting circular frame 111 and the position-adjusting rotating plate 126. The linkage unit includes a linkage belt pulley 128, and the linkage belt pulley 128 is rotatably connected to the corresponding position-adjusting rotating plate 126. A torsion spring is provided between the linkage belt pulley 128 and the corresponding position-adjusting rotating plate 126. One end of the torsion spring is fixedly connected to the linkage belt pulley 128, and the other end of the torsion spring is fixedly connected to the corresponding position-adjusting rotating plate 126. Position-adjusting gear two 125 is rotatably installed on each position-adjusting rotating plate 126, and the position-adjusting gear two 125 meshes with the corresponding position-adjusting gear 112 to form a gear-rack pair. A transmission group is provided between the linkage belt pulley 128 and the corresponding position-adjusting gear two 125. The transmission groups each include a linkage belt 129 and a driven belt pulley 130. The driven belt pulley 130 is rotatably installed on the side of the corresponding position-adjusting gear two 125. A torsion spring is provided between the driven belt pulley 130 and the corresponding position-adjusting gear two 125. One end of the torsion spring is fixedly connected to the driven belt pulley 130, and the other end of the torsion spring is fixedly connected to the position-adjusting gear two 125. The linkage belt 129 is provided between the linkage belt pulley 128 and the corresponding driven belt pulley 130.

[0034] A gear group is provided between the 4 linkage belt pulleys 128. The gear group includes 1 linkage gear ring 106, 4 gear boxes 120, and 4 driven gears 119. The linkage gear ring 106 is rotatably installed on the bottom plate 101. The gear boxes 120 are all fixedly installed on the bottom plate 101. Two bevel gears are provided inside the gear box 120, and the two bevel gears inside the gear box 120 mesh to form a gear pair. The output end of the gear box 120 is fixedly connected to the corresponding linkage belt pulley 128. The driven gears 119 are fixedly installed on the input ends of the gear boxes 120, and the driven gears 119 all mesh with the linkage gear ring 106 to form a gear pair. A driving motor 118 is fixedly installed on the bottom plate 101, and a driving gear 117 is fixedly installed on the output shaft of the driving motor 118. The driving gear 117 meshes with the linkage gear ring 106 to form a gear pair.

[0035] In the initial position, the splicing square plates 103 in the second splicing assembly are all in the vertical state, that is, at this time, the position-adjusting rotating plates 126 are in the vertical state. The position-adjusting rotating plates 126 are all in contact with the support plate two 123, and the relatively arranged splicing square plates 103 are in the position farthest apart. The torsion springs between the linkage belt pulleys 128 and the position-adjusting rotating plates 126 are not compressed.

[0036] At this time, the drive motor 118 is started to drive the drive gear 117 to rotate, the linkage gear ring 106 rotates, and then the four driven gears 119 rotate synchronously. Under the action of the gearbox 120, the four linkage belt pulleys 128 rotate synchronously. Under the action of the linkage belt 129 and the driven belt pulley 130, and under the action of the torsion spring between the position adjustment gear two 125 and the driven belt pulley 130, the four position adjustment gears two 125 rotate synchronously. Under the action of the support plate two 123, the position adjustment rotating plate 126 cannot continue to rotate, and the torsion spring between the position adjustment rotating plate 126 and the linkage belt pulley 128 is compressed, that is, the linkage belt pulley 128 rotates relative to the position adjustment rotating plate 126. Then, under the action of the position adjustment gear 112, the two opposite position adjustment circular frames 111 move towards each other, and finally the splicing square plates 103 are spliced to form a casting chamber. When the two opposite splicing square plates 103 cannot move further, the linkage belt pulley 128 continues to rotate. At this time, the torsion spring between the driven belt pulley 130 and the position adjustment gear two 125 is compressed.

[0037] L-shaped sliding plates 127 are fixedly installed on the outermost ends of the position adjustment gears 112 in the second splicing assembly away from the corresponding circular sliding plates 131. The L-shaped sliding plates 127 are in sliding fit with the position adjustment rotating plates 126 and are in sliding fit when the L-shaped sliding plates 127 contact the corresponding support plates two 123. The L-shaped sliding plates 127 are used to limit the positions between the corresponding position adjustment rotating plates 126 and the bottom plate 101.

[0038] When the position adjustment rotating plate 126 is in a vertical state and the splicing square plates 103 on the position adjustment rotating plate 126 are at the farthest positions, at this time, the L-shaped sliding plates 127 do not contact the support plates two 123. When the drive linkage belt pulley 128 rotates to make the two opposite splicing square plates 103 move towards each other, the L-shaped sliding plates 127 and the support plates two 123 are engaged. Under the action of the support plates two 123 and the L-shaped sliding plates 127, at this time, the position adjustment rotating plate 126 cannot rotate relative to the bottom plate 101, that is, the position of the position adjustment rotating plate 126 is restricted.

[0039] Auxiliary push blocks 115 are fixedly arranged on both the upper support frame 102 and the lower support frame 105. Square slot holes 116 for accommodating the movement of the auxiliary push blocks 115 are arranged on the limit circular plates 110 in the first splicing component. Start the position adjustment motor 114 to drive the first position adjustment gear 113 to rotate, so that the two splicing square plates 103 in the first splicing component move away from each other. First, make the auxiliary push blocks 115 engage with the square slot holes 116 on the limit circular plates 110. The two splicing square plates 103 continue to move away from each other. When the auxiliary push block 115 contacts the corresponding circular sliding plate 131, the circular sliding plate 131 slides relative to the position adjustment circular frame 111, and the spring between the circular sliding plate 131 and the position adjustment circular frame 111 is compressed. Then, under the action of the linkage rack 133, the linkage gear 132 rotates, that is, the sector strip 134 rotates, so that the sector strip 134 disengages from the engagement with the fixed block 109, thereby releasing the fixation between the position adjustment circular frame 111 and the splicing square plate 103.

[0040] Arc-shaped strips 121 are fixedly installed on both the first support plates 122. Arc-shaped slot holes 124 for accommodating the movement of the arc-shaped strips 121 are arranged on the limit circular plates 110 in the second splicing component. The auxiliary push blocks 115 and the arc-shaped strips 121 are respectively used to push the corresponding linkage gears 132 to move. When the position adjustment rotating plate 126 is in the vertical state and the splicing square plate 103 corresponding to the position adjustment rotating plate 126 is at the farthest position, start the driving motor 118 to drive the linkage pulley 128 to rotate. Under the action of the torsion spring between the linkage pulley 128 and the position adjustment rotating plate 126, the end of the position adjustment rotating plate 126 that is farthest from the lower surface of the bottom plate 101 rotates in a direction away from the axis of the linkage gear ring 106, and the components on the position adjustment rotating plate 126 rotate synchronously. First, make the arc-shaped strip 121 contact the arc-shaped slot hole 124 on the corresponding limit circular plate 110. The position adjustment rotating plate 126 continues to rotate. Under the action of the arc-shaped strip 121, the circular sliding plate 131 slides relative to the position adjustment circular frame 111, and finally the sector strip 134 disengages from the engagement with the fixed block 109. At this time, the position adjustment rotating plate 126 is in the horizontal state, and the position adjustment rotating plate 126 contacts the first support plate 122 and cannot move further. The first support plate 122 provides auxiliary support for the current position of the position adjustment rotating plate 126, and the splicing square plate 103 corresponding to the position adjustment rotating plate 126 is also in the horizontal state, so that it is convenient to replace the splicing square plate 103.

[0041] Working principle: Select the required splicing square plate 103 according to the size of the special steel to be cast, and then start the positioning motor 114 and the drive motor 118 respectively, and replace the splicing square plates 103 on each positioning circular frame 111 respectively, and then use the positioning motor 114 and the drive motor 118 to splice the 6 splicing square plates 103 to form a closed casting chamber, and then pour into the casting chamber through the liquid inlet pipe 104 on the splicing square plate 103 corresponding to the upper support frame 102.

[0042] After cooling is completed, first start the two positioning motors 114 to make the two splicing square plates 103 in the first splicing assembly disengage from the contact with the casting. At this time, the casting is in a fixed state under the action of the four splicing square plates 103 in the second splicing assembly, and then make the two splicing square plates 103 in the first splicing assembly contact with the casting, and then start the driving motor 118 to make the four splicing square plates 103 in the second splicing assembly disengage from the contact with the casting, and then start the positioning motor 114 on the upper support frame 102 to make the corresponding splicing square plates 103 disengage from the contact with the casting. At this time, the cast special steel is located on the splicing square plates 103 corresponding to the lower support frame 105, and the automatic demolding of the casting is completed.

[0043] The present invention is not limited to the above-mentioned specific implementation modes. Various changes made by technicians in the relevant technical field based on the above-mentioned conception without creative work all fall within the protection scope of the present invention.

Claims

1. A special steel casting device convenient for demolding, including a bottom plate (101), on which an upper support frame (102) and a lower support frame (105) are fixedly installed. It is characterized in that: A first splicing component and a second splicing component are arranged on the bottom plate (101). The first splicing component includes two symmetrically arranged positioning circular frames (111) slidably installed on the bottom plate (101). The second splicing component includes four positioning rotating plates (126) rotatably installed on the bottom plate (101) in a circumferential array. The positioning circular frames (111) are slidably installed on the positioning rotating plates (126). Splicing square plates (103) are movably arranged on the end faces of the positioning circular frames (111). A closed casting chamber is formed by splicing between the six splicing square plates (103). A self-locking unit is arranged between the splicing square plate (103) and the corresponding positioning circular frame (111), and the self-locking unit is used to fix the splicing square plate (103) and the corresponding positioning circular frame (111). A linkage unit is arranged between the positioning rotating plate (126) and the corresponding positioning circular frame (111), and the linkage unit is used to adjust the positions between the positioning circular frame (111) and the positioning rotating plate (126).

2. The special steel casting device convenient for mold removal according to claim 1, wherein: The two positioning circular frames (111) in the first splicing component are respectively slidably installed on the upper support frame (102) and the lower support frame (105). Positioning gears (112) are fixedly installed on the positioning circular frames (111). Positioning gears one (113) are rotatably installed on the upper support frame (102) and the lower support frame (105). The positioning gear one (113) and the corresponding positioning gear (112) are engaged to form a rack and pinion pair.

3. The special-shaped steel casting device convenient for demolding according to claim 2, wherein: Circular limiting plates (107) are fixedly arranged on the splicing square plates (103). The inner diameter of the circular limiting plate (107) is equal to the outer diameter of the positioning circular frame (111). Four limiting short columns (108) are also fixedly arranged on the splicing square plates (103) in a circumferential array. Four through holes matching the limiting short columns (108) are arranged on the positioning circular frame (111) in a circumferential array. The circular limiting plate (107) and the limiting short column (108) are used to assist in positioning between the splicing square plate (103) and the positioning circular frame (111).

4. The special-shaped steel casting device convenient for demolding according to claim 3, characterized in that: Each self-locking unit includes four fixing blocks (109) and four sector-shaped strip plates (134). The four fixing blocks (109) are fixedly installed on the splicing square plate (103) in a circumferential array. Four linkage gears (132) are rotatably installed on the positioning circular frame (111) in a circumferential array. The sector-shaped strip plates (134) are fixedly installed on the sides of the corresponding linkage gears (132). Arc-shaped sliding grooves matching the sector-shaped strip plates (134) are arranged on the fixing blocks (109). The fixing blocks (109) and the sector-shaped strip plates (134) are used to fix the splicing square plate (103) and the positioning circular frame (111).

5. The special-shaped steel casting device convenient for demolding according to claim 4, wherein: A circular sliding plate (131) is slidably mounted on the position-adjusting circular frame (111). A spring is provided between the circular sliding plate (131) and the position-adjusting circular frame (111). A limiting circular plate (110) is fixedly mounted on the position-adjusting circular frame (111). The limiting circular plate (110) is used to limit the position of the circular sliding plate (131). Four linkage racks (133) are fixedly mounted on the circular sliding plate (131) in a circumferential array. The linkage racks (133) are engaged with the corresponding linkage gears (132) to form a gear-rack pair.

6. The special-shaped steel casting device convenient for demolding according to claim 5, characterized in that: Four first support plates (122) are fixedly mounted on the bottom plate (101) in a circumferential array. Four second support plates (123) are fixedly mounted on the bottom plate (101) in a circumferential array. The first support plates (122) and the second support plates (123) are used to limit the rotational positions of the corresponding position-adjusting rotating plates (126).

7. The special-shaped steel casting device convenient for demolding according to claim 6, characterized in that: The linkage unit includes linkage pulleys (128). The linkage pulleys (128) are rotatably connected to the corresponding position-adjusting rotating plates (126). A torsion spring is provided between the linkage pulleys (128) and the corresponding position-adjusting rotating plates (126). Position-adjusting gears II (125) are rotatably mounted on the position-adjusting rotating plates (126). The position-adjusting gears II (125) are engaged with the corresponding position-adjusting gears (112) to form a gear-rack pair. A transmission group is provided between the linkage pulleys (128) and the corresponding position-adjusting gears II (125). A gear group is provided between the 4 linkage pulleys (128).

8. The special-shaped steel casting device convenient for demolding according to claim 7, wherein: L-shaped sliding plates (127) are fixedly mounted on the ends of the position-adjusting gears (112) in the second splicing assembly that are farthest from the corresponding circular sliding plates (131). The L-shaped sliding plates (127) are slidably matched with the position-adjusting rotating plates (126). When the L-shaped sliding plates (127) contact the corresponding second support plates (123), they are slidably matched. The L-shaped sliding plates (127) are used to limit the positions between the corresponding position-adjusting rotating plates (126) and the bottom plate (101).

9. The special-shaped steel casting device convenient for demolding according to claim 8, wherein: Auxiliary pushing blocks (115) are fixedly provided on both the upper support frame (102) and the lower support frame (105). Square slot holes (116) for accommodating the movement of the auxiliary pushing blocks (115) are provided on the limiting circular plates (110) in the first splicing assembly. Arc-shaped strip plates (121) are fixedly mounted on the first support plates (122). Arc-shaped slot holes (124) for accommodating the movement of the arc-shaped strip plates (121) are provided on the limiting circular plates (110) in the second splicing assembly. The auxiliary pushing blocks (115) and the arc-shaped strip plates (121) are respectively used to push the corresponding linkage gears (132) to move.

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