Grooved belt pulley casting mold and casting method thereof

Abstract

The invention discloses a grooved belt pulley casting mold and a casting method thereof, and relates to the technical field of belt pulley casting. Comprising a bottom plate, a lower template is fixedly arranged in the middle of the top surface of the bottom plate, and an upper template is arranged above the lower template; the left side and the right side of the lower die plate are provided with a pair of semicircular die plates, and the upper die plate, the lower die plate and the pair of semicircular die plates are mutually closed to form a grooved belt pulley casting cavity. The upper mold plate, the lower mold plate and the pair of semicircular mold plates are arranged to be mutually closed to form the grooved belt pulley casting cavity, the combined mold plate is provided, the combined mold plate is more convenient to mount, dismount, clean and the like, and the combined mold plate is matched with a servo motor, a connecting rod assembly and other components, so that the production efficiency is improved. The upper mold plate, the lower mold plate and the pair of semicircular mold plates can be mutually closed or separated, so that casting and demolding of the belt pulley with the groove are automatically completed, the operation is simple, and the labor cost is low.

Description

Technical Field

[0001] The invention relates to the technical field of pulley casting, and in particular to a grooved pulley casting mold and a casting method thereof. Background Art

[0002] The pulley casting mold usually consists of an upper mold and a lower mold, which are used to form the outer shape of the pulley. The upper mold is generally located at the top of the mold, and the lower mold is located at the bottom. During the casting process, the molten metal is injected into the cavity composed of the upper mold and the lower mold.

[0003] Most of the pulley casting molds in the prior art need to be manually demoulded after casting, which is cumbersome to operate and has high labor costs. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a casting mold for a grooved pulley and a casting method thereof.

[0005] In order to solve the problems existing in the prior art, the present invention adopts the following technical solutions: The present invention provides a casting mold for a grooved pulley, comprising a bottom plate, a lower mold plate fixedly arranged in the middle of the top surface of the bottom plate, and an upper mold plate suspended above the lower mold plate; The rear side of the bottom plate is fixedly provided with a transversely distributed L-shaped horizontal plate, the middle of the L-shaped horizontal plate is provided with a pair of rectangular sliding holes, and the top of the back side of the upper template is fixedly provided with a pair of L-shaped sliding plates, and the bottom end of each L-shaped sliding plate is slidably inserted into the rectangular sliding hole on the corresponding side; A pair of symmetrically distributed semicircular templates are provided on the left and right sides of the lower template, and the upper template, the lower template, and the pair of semicircular templates are closed to form a casting cavity with a grooved pulley; A pair of symmetrically distributed U-shaped brackets are fixedly arranged on both sides of the top surface of the bottom plate, and each of the U-shaped brackets is connected to the semicircular template on the adjacent side through a connecting rod assembly.

[0006] Preferably, a casting nozzle is provided in the middle of the top surface of the upper template, and a plurality of casting holes connected to the casting nozzle are provided in the middle of the upper template; A pair of rectangular through holes are provided on both sides of the top surface of the bottom plate, and L-shaped supporting legs are fixedly provided on the two corners of the front side of the bottom surface of the bottom plate and the left and right sides of the bottom surface of the L-shaped cross plate.

[0007] Preferably, the opening inner top wall and the middle part of the U-shaped bracket are rotatably inserted with a penetrating fixed shaft, and the middle part of each fixed shaft is sleeved with a concentrically fixed notched gear, and a pair of notched gears are symmetrical up and down and meshingly connected.

[0008] Preferably, the connecting rod assembly comprises a first connecting rod and a second connecting rod, a U-shaped connecting plate is fixedly provided at the middle of the outer side surface of the semicircular template, two corners in the opening of the U-shaped connecting plate are rotatably inserted with driven connecting shafts that penetrate through, and a pair of first connecting rods that are staggered are fixedly provided at the outer ends of a pair of driven connecting shafts; A pair of staggered second connecting rods are fixedly arranged at the outer ends of the pair of fixed connecting shafts, and the outer end of each second connecting rod is movably hinged to the outer end of the first connecting rod on the corresponding side in a V-shape.

[0009] Preferably, a pair of fixed ear seats are fixedly provided on both sides of the top surface of the L-shaped horizontal plate, a fixed horizontal shaft is rotatably inserted between the pair of fixed ear seats and is distributed transversely therethrough, and a pair of concentrically fixed hollow worms are sleeved on both sides of the fixed horizontal shaft; A first coupling shaft is fixedly disposed at the rear end of the fixed coupling shaft located on the upper left side, and a concentrically fixed large-diameter notched worm gear is sleeved on the rear end of the first coupling shaft, and the large-diameter notched worm gear is meshedly connected with the hollow worm gear on the adjacent side; A second coupling shaft is fixed to the rear end of the fixed coupling shaft located at the lower right side. A concentrically fixed small-diameter notched worm gear is sleeved on the rear end of the second coupling shaft. The small-diameter notched worm gear is meshedly connected with the hollow worm gear on the adjacent side.

[0010] Preferably, a frame-shaped bracket is fixedly provided on the right side of the bottom surface of the base plate, a servo motor with the output end facing outward is fixedly provided in the opening of the frame-shaped bracket, a small-diameter pulley is concentrically fixedly provided on the end of the motor shaft of the servo motor, a large-diameter pulley is concentrically fixedly provided on the right end of the fixed horizontal axis, and the small-diameter pulley is connected to the large-diameter pulley through a driving belt.

[0011] Preferably, a T-shaped ear seat is fixedly provided in the middle part of the back side of the L-shaped horizontal plate, and a linkage shaft is rotatably inserted into the top end of the T-shaped ear seat, and a concentrically fixed widened linkage gear is sleeved on the front end of the linkage shaft, and a driven rack is fixedly provided on one side of the L-shaped slide plate, and the widened linkage gear is meshingly connected with the driven rack.

[0012] Preferably, an L-shaped connecting plate and an L-shaped heightening connecting plate are fixed to the rear side of the top surface of the bottom plate, respectively, a first sliding hole is opened at the outer end of the L-shaped connecting plate, a first L-shaped connecting rod is slidably inserted inside the first sliding hole, one end of the first L-shaped connecting rod is fixedly connected to the adjacent semicircular template, and the other end of the first L-shaped connecting rod is fixedly provided with a first rack, and the first rack is meshed and connected with the widening linkage gear; A second sliding hole is provided at the outer end of the L-shaped heightened connecting plate, a second L-shaped connecting rod is slidably inserted inside the second sliding hole, one end of the second L-shaped connecting rod is fixedly connected to the adjacent semicircular template, and the other end of the second L-shaped connecting rod is fixedly provided with a second rack, the second rack is meshedly connected to the widening linkage gear, and the first rack and the second rack are staggered.

[0013] Preferably, a fixing ring is fixedly provided in the middle part of the bottom surface of the base plate, a vortex wire groove is opened on the inner top wall of the fixing ring, a vortex wire liquid cooling tube is installed inside the vortex wire groove, and a liquid cooling circulation pump is fixedly provided on the bottom surface of the base plate, and the liquid inlet and outlet ends of the liquid cooling circulation pump are respectively connected to the two ends of the vortex wire liquid cooling tube.

[0014] The present invention also provides a casting method of a grooved pulley casting mold, using the above-mentioned grooved pulley casting mold, comprising the following steps: Step 1: Under the driving action of the servo motor, the motor shaft of the servo motor drives the small-diameter pulley to rotate synchronously at high speed, and the small-diameter pulley drives the large-diameter pulley, the fixed horizontal shaft and a pair of hollow worms to rotate at low speed through the driving belt; Step 2: The hollow worm gear on the left side meshes to drive the large-diameter notched worm wheel, the first coupling shaft and the corresponding fixed coupling shaft to rotate, and the hollow worm gear on the right side meshes to drive the small-diameter notched worm wheel, the second coupling shaft and the corresponding fixed coupling shaft to rotate; Step 3: The fixed connecting shaft drives the corresponding second connecting rod and the notched gear to rotate synchronously. Under the meshing relative rotation of the adjacent pair of notched gears, the fixed connecting shaft and the second connecting rod on the other side are driven to rotate relatively. Under the V-shaped hinge expansion of the second connecting rod and the first connecting rod, a pair of semicircular templates are driven to close synchronously toward the lower template. Step 4: The semicircular template on the left side drives the first L-shaped connecting rod and the first rack to slide along the first sliding hole, and the semicircular template on the right side drives the second L-shaped connecting rod and the second rack to slide along the second sliding hole. The first rack and the second rack are synchronously meshed to drive the widened linkage gear and the linkage shaft to rotate. Step 5: widen the linkage gear and mesh it again to drive the driven rack and a pair of L-shaped slide plates to slide downward along a pair of rectangular slide holes, and simultaneously drive the upper template toward the lower template and a pair of semicircular templates to close; Step 6: After the upper template, the lower template, and a pair of semicircular templates are closed to form a grooved pulley casting cavity, the metal liquid is poured into the casting nozzle, and the metal liquid flows evenly into the grooved pulley casting cavity along the casting nozzle and a plurality of casting holes, and the casting operation is stopped, and the grooved pulley after casting is cooled and formed; Step 7: Under the action of the liquid cooling circulation pump, the coolant in the vortex line liquid cooling pipe is driven to circulate along the vortex line liquid cooling pipe, and the grooved pulley after casting is cooled by heat transfer; Step eight, after the grooved belt pulley is cooled and formed, the motor shaft of the servo motor is controlled to rotate in the opposite direction, so that the upper template and a pair of semicircular templates are demoulded, and then the grooved belt pulley after cooling and forming is taken out.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, an upper template, a lower template and a pair of semicircular templates are provided to close each other to form a casting cavity for a grooved pulley, and a combined template is provided. This combined template is more convenient in installation, disassembly and cleaning operations. With the help of a servo motor, a connecting rod assembly and other components, the upper template, the lower template and a pair of semicircular templates can be closed or separated from each other, thereby realizing automatic completion of casting and demoulding of the grooved pulley, which is simple to operate and has low labor costs; 2. In the present invention, the grooved belt pulley casting cavity formed by the upper mold plate, the lower mold plate and a pair of semicircular mold plates closed together can provide a precise shape for the grooved belt pulley. This combined mold plate structure can closely fit the designed shape of the grooved belt pulley, so that the cast grooved belt pulley can well meet the expected size and contour requirements in appearance; 3. In the present invention, when casting a grooved pulley, the shape of the cavity is crucial to the molding quality of the pulley groove. Through this closed template structure, the size and depth of the pulley groove can be guaranteed to be uniform; because the template pre-designs the shape of the groove, after the metal liquid solidifies in the cavity, the regularity of the groove can be effectively guaranteed, so that the belt can be better fitted in the groove of the pulley, reducing the wear and deviation of the belt; 4. In the present invention, when the casting nozzle pours a proper amount of molten metal into the cavity, the molten metal flows and distributes more evenly in the cavity due to the regular shape of the closed casting cavity, which helps to avoid defects such as local metal accumulation or cavities; 5. In the present invention, the uniformly distributed metal liquid can form a dense internal structure during the solidification process, because in a stable cavity environment, the solidification of the metal liquid is carried out in an orderly manner, and there are no external factors interfering with its crystallization process, thereby reducing casting defects such as pores and shrinkage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a rear view schematic diagram of the overall structure of the present invention; Figure 3It is a schematic cross-sectional view of the overall structure of the present invention; Figure 4 It is an exploded schematic diagram of the overall structure of the present invention; Figure 5 It is a structural schematic diagram of the connecting rod assembly in the present invention; Figure 6 It is an exploded schematic diagram of the lower template, the upper template, and a pair of semicircular templates in the present invention; Figure 7 It is a rear exploded schematic diagram of the lower template, the upper template, and a pair of semicircular templates in the present invention; The serial numbers in the figure are: 1, bottom plate; 11, lower template; 12, upper template; 13, casting nozzle; 14, casting hole; 15, rectangular through hole; 16, servo motor; 17, driving belt; 2, L-shaped horizontal plate; 21, T-shaped ear seat; 22, widened linkage gear; 23, L-shaped slide plate; 24, driven rack; 3, semicircular template; 31, U-shaped connecting plate; 32, U-shaped bracket; 33, fixed shaft; 34, notched gear; 35, First connecting rod; 36, second connecting rod; 4, fixed ear seat; 41, fixed horizontal axis; 42, hollow worm; 43, first connecting shaft; 44, large diameter notched worm gear; 45, second connecting shaft; 46, small diameter notched worm gear; 5, liquid cooling circulation pump; 51, vortex line liquid cooling pipe; 52, L-shaped connecting plate; 53, first L-shaped connecting rod; 54, first rack; 55, L-shaped heightened connecting plate; 56, second L-shaped connecting rod; 57, second rack. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely 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.

[0018] Embodiment 1: This embodiment provides a casting mold for a grooved pulley, see Figure 1-7 , comprising a bottom plate 1, a lower template 11 is fixedly arranged in the middle of the top surface of the bottom plate 1, and an upper template 12 suspended above the lower template 11 is arranged; A transversely distributed L-shaped horizontal plate 2 is fixedly provided on the rear side of the bottom plate 1, a pair of rectangular sliding holes are opened in the middle of the L-shaped horizontal plate 2, and a pair of L-shaped sliding plates 23 are fixedly provided on the top of the back side of the upper template 12, and the bottom end of each L-shaped sliding plate 23 is slidably inserted into the rectangular sliding hole on the corresponding side; A pair of symmetrically distributed semicircular templates 3 are provided on the left and right sides of the lower template 11, and the upper template 12, the lower template 11, and the pair of semicircular templates 3 are closed together to form a casting cavity with a grooved pulley; A pair of symmetrically distributed U-shaped brackets 32 are fixedly provided on both sides of the top surface of the bottom plate 1 , and each U-shaped bracket 32 ​​is connected to the semicircular template 3 on an adjacent side through a connecting rod assembly.

[0019] It should be noted that: in this embodiment, a casting nozzle 13 is opened in the middle of the top surface of the upper template 12, and a plurality of casting holes 14 connected to the casting nozzle 13 are opened in the middle of the upper template 12. A proper amount of molten metal is poured into the casting nozzle 13, and the molten metal flows evenly into the casting cavity of the grooved pulley along the casting nozzle 13 and the plurality of casting holes 14; A pair of rectangular through holes 15 are provided on both sides of the top surface of the bottom plate 1, and L-shaped support legs are fixedly provided at the two corners of the front side of the bottom of the bottom plate 1 and the left and right sides of the bottom surface of the L-shaped cross plate 2; A fixing ring is fixedly provided in the middle of the bottom surface of the base plate 1, and a vortex wire groove is opened on the inner top wall of the fixing ring. A vortex wire liquid cooling tube 51 is installed inside the vortex wire groove. A liquid cooling circulation pump 5 is fixedly provided on the bottom surface of the base plate 1, and the liquid inlet and outlet ends of the liquid cooling circulation pump 5 are respectively connected with the two ends of the vortex wire liquid cooling tube 51; under the action of the liquid cooling circulation pump 5, the coolant in the vortex wire liquid cooling tube 51 can be driven to circulate along the vortex wire liquid cooling tube 51, and the grooved pulley after casting is cooled by heat transfer.

[0020] Embodiment 2: Based on Embodiment 1, this embodiment also includes the following contents: like Figure 3 and Figure 5 As shown, the top wall and the middle of the opening of the U-shaped bracket 32 ​​are rotatably inserted with fixed shafts 33 that penetrate through, and the middle of each fixed shaft 33 is sleeved with a concentric fixed notch gear 34, and a pair of notch gears 34 are symmetrical and meshed; The connecting rod assembly includes a first connecting rod 35 and a second connecting rod 36. A U-shaped connecting plate 31 is fixedly arranged in the middle of the outer side surface of the semicircular template 3. A driven connecting shaft is rotatably inserted into the two corners of the opening of the U-shaped connecting plate 31. A pair of staggered first connecting rods 35 are fixedly arranged at the outer ends of the pair of driven connecting shafts. A pair of staggered second connecting rods 36 are fixedly disposed at the outer ends of the pair of fixed connecting shafts 33, and the outer end of each second connecting rod 36 is hinged to the outer end of the first connecting rod 35 on the corresponding side in a V-shape. The fixed connecting shaft 33 can drive the corresponding second connecting rod 36 and the notched gear 34 to rotate synchronously. Since a pair of notched gears 34 are engaged and rotate relative to each other, the fixed connecting shaft 33 and the second connecting rod 36 on the other side are driven to rotate relative to each other. Under the action of the V-shaped hinge expansion of the second connecting rod 36 and the first connecting rod 35, a pair of semicircular templates 3 can be driven to close synchronously toward the lower template 11.

[0021] Embodiment 3: Based on Embodiment 2, this embodiment also includes the following contents: like Figure 2 and Figure 4As shown, a pair of fixed ear seats 4 are fixedly arranged on both sides of the top surface of the L-shaped horizontal plate 2, a fixed horizontal shaft 41 is rotatably inserted between the pair of fixed ear seats 4 and is distributed transversely therethrough, and a pair of concentrically fixed hollow worms 42 are sleeved on both sides of the fixed horizontal shaft 41; A first connecting shaft 43 is fixed to the rear end of the fixed connecting shaft 33 located on the upper left side. A large-diameter notched worm wheel 44 is sleeved on the rear end of the first connecting shaft 43 and fixedly connected thereto. The large-diameter notched worm wheel 44 is meshedly connected to the hollow worm 42 on the adjacent side. The hollow worm 42 located on the left side can meshly drive the large-diameter notched worm wheel 44, the first connecting shaft 43 and the corresponding fixed connecting shaft 33 to rotate. A second connecting shaft 45 is fixedly disposed at the rear end of the fixed connecting shaft 33 located at the lower right side. A small-diameter notched worm wheel 46 is sleeved and fixedly disposed at the rear end of the second connecting shaft 45. The small-diameter notched worm wheel 46 is meshedly connected with the hollow worm 42 on the adjacent side. The hollow worm 42 located on the right side can meshly drive the small-diameter notched worm wheel 46, the second connecting shaft 45 and the corresponding fixed connecting shaft 33 to rotate. A frame-shaped bracket is fixedly provided on the right side of the bottom surface of the base plate 1, and a servo motor 16 with an output end facing outward is fixedly provided in the opening of the frame-shaped bracket. A small-diameter pulley is concentrically fixedly provided on the end of the motor shaft of the servo motor 16, and the motor shaft of the servo motor 16 can drive the small-diameter pulley to rotate synchronously at high speed. A large-diameter pulley is concentrically fixedly provided on the right end of the fixed horizontal shaft 41, and the small-diameter pulley is connected to the large-diameter pulley through a driving belt 17. The small-diameter pulley can drive the large-diameter pulley, the fixed horizontal shaft 41 and a pair of hollow worms 42 to rotate at a low speed through the driving belt 17.

[0022] Embodiment 4: Based on Embodiment 3, this embodiment also includes the following contents: like Figure 2 and Figure 7 As shown, a T-shaped ear seat 21 is fixedly arranged at the middle of the back of the L-shaped horizontal plate 2, and a linkage shaft that is distributed through the top end of the T-shaped ear seat 21 is rotatably inserted, and a concentrically fixed widened linkage gear 22 is sleeved on the front end of the linkage shaft, and a driven rack 24 is fixedly arranged on the L-shaped slide plate 23 on one side, and the widened linkage gear 22 is meshed and connected with the driven rack 24, and the widened linkage gear 22 can mesh and drive the driven rack 24 and a pair of L-shaped slide plates 23 to slide downward along a pair of rectangular sliding holes, and synchronously drive the upper template 12 to move toward the lower template 11 and the pair of semicircular templates 3 to close; An L-shaped connecting plate 52 and an L-shaped heightening connecting plate 55 are fixed to the rear side of the top surface of the bottom plate 1, respectively. A first sliding hole is opened at the outer end of the L-shaped connecting plate 52, and a first L-shaped connecting rod 53 is slidably inserted inside the first sliding hole. One end of the first L-shaped connecting rod 53 is fixedly connected to the adjacent semicircular template 3, and the other end of the first L-shaped connecting rod 53 is fixedly provided with a first rack 54. The semicircular template 3 on the left side can drive the first L-shaped connecting rod 53 and the first rack 54 to slide along the first sliding hole, and the first rack 54 is meshed and connected with the widening linkage gear 22; A second sliding hole is provided at the outer end of the L-shaped heightening connecting plate 55, and a second L-shaped connecting rod 56 is slidably inserted inside the second sliding hole. One end of the second L-shaped connecting rod 56 is fixedly connected to the adjacent semicircular template 3, and the other end of the second L-shaped connecting rod 56 is fixedly provided with a second rack 57. The semicircular template 3 on the right side can drive the second L-shaped connecting rod 56 and the second rack 57 to slide along the second sliding hole. The second rack 57 is meshed and connected with the widening linkage gear 22, and the first rack 54 and the second rack 57 are staggered. The first rack 54 and the second rack 57 can be synchronously meshed to drive the widening linkage gear 22 and the linkage shaft to rotate.

[0023] Specifically, the working principle and operation method of the present invention are as follows: Step 1: Under the driving action of the servo motor 16, the motor shaft of the servo motor 16 drives the small-diameter pulley to rotate synchronously at a high speed, and the small-diameter pulley drives the large-diameter pulley, the fixed horizontal shaft 41 and a pair of hollow worms 42 to rotate at a low speed through the driving belt 17; Step 2: The hollow worm 42 on the left side meshes to drive the large-diameter notched worm wheel 44, the first connecting shaft 43 and the corresponding fixed connecting shaft 33 to rotate, and the hollow worm 42 on the right side meshes to drive the small-diameter notched worm wheel 46, the second connecting shaft 45 and the corresponding fixed connecting shaft 33 to rotate; Step 3: The fixed connecting shaft 33 drives the corresponding second connecting rod 36 and the notched gear 34 to rotate synchronously. Under the meshing relative rotation of the adjacent pair of notched gears 34, the fixed connecting shaft 33 and the second connecting rod 36 on the other side are driven to rotate relatively. Under the V-shaped hinge expansion of the second connecting rod 36 and the first connecting rod 35, the pair of semicircular templates 3 are driven to close synchronously toward the lower template 11. Step 4: The semicircular template 3 on the left side drives the first L-shaped connecting rod 53 and the first rack 54 to slide along the first sliding hole, and the semicircular template 3 on the right side drives the second L-shaped connecting rod 56 and the second rack 57 to slide along the second sliding hole. The first rack 54 and the second rack 57 are synchronously meshed to drive the widened linkage gear 22 and the linkage shaft to rotate. Step 5, widen the linkage gear 22 and mesh it to drive the driven rack 24 and a pair of L-shaped slide plates 23 to slide downward along a pair of rectangular slide holes, and synchronously drive the upper template 12 to close toward the lower template 11 and a pair of semicircular templates 3; Step 6: After the upper template 12, the lower template 11, and a pair of semicircular templates 3 are closed to form a grooved pulley casting cavity, a proper amount of molten metal is poured into the casting nozzle 13, and the molten metal flows evenly into the grooved pulley casting cavity along the casting nozzle 13 and a plurality of casting holes 14, and the casting operation is stopped, and the grooved pulley after casting is cooled and formed; Step 7: Under the action of the liquid cooling circulation pump 5, the coolant in the spiral line liquid cooling tube 51 is driven to circulate along the spiral line liquid cooling tube 51, and the grooved pulley after casting is cooled by heat transfer; Step eight, after the grooved belt pulley is cooled and formed, the motor shaft of the servo motor 16 is controlled to rotate in the opposite direction, so that the upper template 12 and a pair of semicircular templates 3 are demoulded, and then the grooved belt pulley after cooling and forming is taken out.

[0024] The present invention adopts a combined template, which is more convenient in installation, disassembly and cleaning operations. After casting is completed, the demoulding operation is relatively simple, does not require a complicated demoulding mechanism, and has a high degree of automation.

[0025] 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 casting mold for a grooved pulley, characterized in that: It comprises a bottom plate (1), a lower template (11) is fixedly arranged in the middle of the top surface of the bottom plate (1), and an upper template (12) is suspended above the lower template (11); A transversely distributed L-shaped horizontal plate (2) is fixedly provided on the rear side of the bottom plate (1), a pair of rectangular sliding holes are opened in the middle of the L-shaped horizontal plate (2), and a pair of L-shaped sliding plates (23) are fixedly provided on the top of the back side of the upper template (12), and the bottom end of each L-shaped sliding plate (23) is slidably inserted into the rectangular sliding hole on the corresponding side; A pair of symmetrically distributed semicircular templates (3) are provided on the left and right sides of the lower template (11); the upper template (12), the lower template (11), and the pair of semicircular templates (3) are closed together to form a casting cavity with a grooved pulley; A pair of symmetrically distributed U-shaped brackets (32) are fixedly provided on both sides of the top surface of the bottom plate (1), and each of the U-shaped brackets (32) is connected to the semicircular template (3) on an adjacent side via a connecting rod assembly.

2. A casting mold for a grooved pulley according to claim 1, characterized in that: A casting nozzle (13) is provided in the middle of the top surface of the upper mold plate (12), and a plurality of casting holes (14) connected to the casting nozzle (13) are provided in the middle of the upper mold plate (12); A pair of rectangular through holes (15) are provided on both sides of the top surface of the bottom plate (1), and L-shaped support legs are fixedly provided at the two corners of the front side edges of the bottom surface of the bottom plate (1) and the left and right sides of the bottom surface of the L-shaped cross plate (2).

3. A casting mold for a grooved pulley according to claim 2, characterized in that: The top wall and the middle of the opening of the U-shaped bracket (32) are both rotatably inserted with a penetrating fixed shaft (33), and the middle of each fixed shaft (33) is sleeved with a concentrically fixed notched gear (34), and a pair of notched gears (34) are symmetrical in upper and lower directions and meshingly connected.

4. A casting mold for a grooved pulley according to claim 3, characterized in that: The connecting rod assembly comprises a first connecting rod (35) and a second connecting rod (36); a U-shaped connecting plate (31) is fixedly provided at the middle of the outer side surface of the semicircular template (3); driven connecting shafts are rotatably inserted through the opening of the U-shaped connecting plate (31) at two corners; a pair of first connecting rods (35) are fixedly provided at the outer ends of the pair of driven connecting shafts in an alternating manner; A pair of staggered second connecting rods (36) are fixedly disposed at the outer ends of the pair of fixed connecting shafts (33), and the outer end of each second connecting rod (36) is movably hinged to the outer end of the first connecting rod (35) on the corresponding side in a V-shape.

5. A casting mold for a grooved pulley according to claim 4, characterized in that: A pair of fixed ear seats (4) are fixedly provided on both sides of the top surface of the L-shaped horizontal plate (2); a fixed horizontal shaft (41) is rotatably inserted between the pair of fixed ear seats (4) and is distributed transversely therethrough; and a pair of concentrically fixed hollow worm gears (42) are sleeved on both sides of the fixed horizontal shaft (41); A first connecting shaft (43) is fixedly disposed at the rear end of the fixed connecting shaft (33) located on the upper left side, and a large-diameter notched worm wheel (44) is sleeved and fixedly disposed concentrically at the rear end of the first connecting shaft (43), and the large-diameter notched worm wheel (44) is meshingly connected to the hollow worm (42) on the adjacent side; A second connecting shaft (45) is fixedly mounted on the rear end of the fixed connecting shaft (33) located at the lower right side. A small-diameter notched worm gear (46) is concentrically fixedly mounted on the rear end of the second connecting shaft (45). The small-diameter notched worm gear (46) is meshingly connected to the hollow worm (42) on the adjacent side.

6. A casting mold for a grooved pulley according to claim 5, characterized in that: A frame-shaped bracket is fixedly provided on the right side of the bottom surface of the base plate (1), and a servo motor (16) with an output end facing outward is fixedly provided in the opening of the frame-shaped bracket. A small-diameter belt pulley is concentrically fixedly sleeved on the motor shaft end of the servo motor (16), and a large-diameter belt pulley is concentrically fixedly sleeved on the right end of the fixed horizontal shaft (41), and the small-diameter belt pulley is transmission-connected to the large-diameter belt pulley via a driving belt (17).

7. A casting mold for a grooved pulley according to claim 6, characterized in that: A T-shaped ear seat (21) is fixedly provided at the middle of the back side of the L-shaped horizontal plate (2), a linkage shaft is rotatably inserted through the top end of the T-shaped ear seat (21), a front end of the linkage shaft is sleeved with a concentrically fixed widened linkage gear (22), a driven rack (24) is fixedly provided on one side of the L-shaped sliding plate (23), and the widened linkage gear (22) is meshingly connected with the driven rack (24).

8. The casting mold for a grooved pulley according to claim 7, characterized in that: An L-shaped connecting plate (52) and an L-shaped heightened connecting plate (55) are fixedly provided on the rear side of the top surface of the bottom plate (1), the outer end of the L-shaped connecting plate (52) is provided with a first sliding hole, a first L-shaped connecting rod (53) is slidably inserted into the interior of the first sliding hole, one end of the first L-shaped connecting rod (53) is fixedly connected to the adjacent semicircular template (3), the other end of the first L-shaped connecting rod (53) is fixedly provided with a first rack (54), and the first rack (54) is meshingly connected to the widening linkage gear (22); A second sliding hole is formed at the outer end of the L-shaped heightening connecting plate (55), a second L-shaped connecting rod (56) is slidably inserted into the interior of the second sliding hole, one end of the second L-shaped connecting rod (56) is fixedly connected to the adjacent semicircular template (3), and the other end of the second L-shaped connecting rod (56) is fixedly connected to a second rack (57), the second rack (57) is meshingly connected to the widening linkage gear (22), and the first rack (54) and the second rack (57) are arranged in a staggered manner.

9. A casting mold for a grooved pulley according to claim 8, characterized in that: A fixing ring is fixedly provided in the middle of the bottom surface of the base plate (1), a spiral wire groove is provided on the inner top wall of the fixing ring, a spiral wire liquid cooling pipe (51) is installed inside the spiral wire groove, and a liquid cooling circulation pump (5) is fixedly provided on the bottom surface of the base plate (1), and the liquid inlet and outlet ends of the liquid cooling circulation pump (5) are respectively connected to the two ends of the spiral wire liquid cooling pipe (51).

10. The casting method of a grooved pulley casting mold according to claim 9, characterized in that: The following steps are involved: Step 1: Under the driving action of the servo motor (16), the motor shaft of the servo motor (16) drives the small-diameter pulley to rotate synchronously at a high speed, and the small-diameter pulley drives the large-diameter pulley, the fixed horizontal shaft (41) and a pair of hollow worms (42) to rotate at a low speed through the driving belt (17); Step 2: The hollow worm (42) on the left side meshes to drive the large-diameter notched worm wheel (44), the first connecting shaft (43) and the corresponding fixed connecting shaft (33) to rotate, and the hollow worm (42) on the right side meshes to drive the small-diameter notched worm wheel (46), the second connecting shaft (45) and the corresponding fixed connecting shaft (33) to rotate; Step three, the fixed connecting shaft (33) then drives the corresponding second connecting rod (36) and the notched gear (34) to rotate synchronously, and under the meshing relative rotation of the adjacent pair of notched gears (34), the fixed connecting shaft (33) and the second connecting rod (36) on the other side are driven to rotate relatively, and under the V-shaped hinge expansion of the second connecting rod (36) and the first connecting rod (35), the pair of semicircular templates (3) are driven to close synchronously toward the lower template (11); Step 4: the semicircular template (3) on the left side drives the first L-shaped connecting rod (53) and the first rack (54) to slide along the first sliding hole, and the semicircular template (3) on the right side drives the second L-shaped connecting rod (56) and the second rack (57) to slide along the second sliding hole, and the first rack (54) and the second rack (57) are synchronously meshed to drive the widened linkage gear (22) and the linkage shaft to rotate; Step 5, widening the linkage gear (22) and then meshing to drive the driven rack (24) and a pair of L-shaped slide plates (23) to slide downward along a pair of rectangular slide holes, and synchronously drive the upper template (12) to close toward the lower template (11) and a pair of semicircular templates (3); Step 6, after the upper template (12), the lower template (11), and a pair of semicircular templates (3) are closed to form a grooved belt pulley casting cavity, molten metal is poured into the casting nozzle (13), and the molten metal flows evenly into the grooved belt pulley casting cavity along the casting nozzle (13) and a plurality of casting holes (14), and the casting operation is stopped, and the grooved belt pulley after casting is cooled and formed; Step seven, under the action of the liquid cooling circulation pump (5), the coolant in the spiral line liquid cooling tube (51) is driven to circulate along the spiral line liquid cooling tube (51), and the grooved pulley after casting is cooled by heat transfer; Step eight, after the grooved belt pulley is cooled and formed, the motor shaft of the servo motor (16) is controlled to rotate in the opposite direction, so that the upper template (12) and the pair of semicircular templates (3) are demoulded, and then the grooved belt pulley that has been cooled and formed is taken out.

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