A casting mold for a grooved pulley and a casting method thereof

Abstract

The present invention relates to the technical field of pulley casting molds, and discloses a grooved pulley casting mold and a casting method thereof, comprising a base plate and an adapted mold body, wherein a coaxially connected turntable and an adjusting roller are installed on the mold core column. In terms of workpiece forming and mold protection, the present invention uses the indentation plates staggered and evenly distributed on the side walls of the mold core column to achieve local and gradual separation of the mold core and the workpiece, thereby avoiding the problem of workpiece deformation caused by uneven force and effectively ensuring the forming quality of the grooved pulley; at the same time, through the linkage design of the adjusting roller, the sleeve and the spring plate, the deformation position of the spring plate gradually changes, thereby avoiding the impact force generated by the instantaneous separation of the workpiece and the mold core, and preventing the mold core from being damaged due to the concentration of demolding stress. This innovative design not only ensures the high-precision forming of the workpiece, but also significantly improves the durability of the mold, reduces the production loss and cost caused by poor workpieces and mold damage, and achieves a dual improvement in workpiece quality and mold life.

Description

Technical Field

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

[0002] Grooved pulley casting molds are specialized tools used to manufacture pulleys and play a vital role in the production of mechanical transmission components. Their quality and performance directly impact the pulley's precision, strength, and surface quality, and thus the transmission efficiency and stability of the mechanical equipment.

[0003] Traditional grooved pulley casting molds typically use a lifting method to separate the core from the workpiece during the demolding process. However, due to the large contact area between the core and the formed grooved pulley, uneven force is easily applied during the lifting process, causing workpiece deformation, seriously affecting the product's dimensional accuracy and surface quality, and reducing the product qualification rate. Furthermore, the high impact force generated by the instantaneous demolding can damage the core, causing wear and cracking of the mold. This not only increases mold maintenance costs, but also significantly reduces production efficiency and extends the production cycle due to frequent mold changes.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] To address the demolding issues of traditional grooved pulley casting molds, most often the core is lifted to separate the mold from the workpiece. However, due to the large contact area between the mold core and the formed grooved pulley, uneven force is easily applied during the lifting process, causing deformation of the workpiece, seriously affecting the dimensional accuracy and surface quality of the product, and reducing the product qualification rate. Furthermore, the large impact force generated by instant demolding can damage the core, causing wear and tear on the mold. This not only increases mold maintenance costs, but also requires frequent mold replacement, significantly impacting production efficiency and extending the production cycle. The basic concept of the technical solution adopted by the present invention is:

[0006] A casting mold for a grooved pulley comprises a base plate and an adapted mold body.

[0007] The mold body includes a left mold, a right mold and a mold core column placed on a base plate;

[0008] The side walls of the mold core column are staggeredly installed with a plurality of pairs of inward shrinking plates and spring plates;

[0009] A coaxially connected turntable and an adjusting roller are installed on the mold core column;

[0010] The turntable is provided with a combination groove, and the combination groove includes a circular groove, an outer side of the circular groove is provided with an incision groove in an inclined position, and a connecting rod connected to the retracting plate is slid on the incision groove, and the connecting rod is also connected to a pull rod connected to the spring plate, the rotating incision groove guides the connecting rod to slide horizontally, thereby causing the retracting plate to retract and separate from the workpiece, and also causing the pull rod to pull the spring plate to elastically deform and separate from the workpiece;

[0011] A spiral groove is provided on the adjusting roller, and a collar is engaged in the spiral groove. The collar is used to drive the pull rod to slide vertically and change the deformation position of the spring plate.

[0012] As a preferred embodiment of the present invention, four bases are installed at the bottom of the base plate, and anti-slip pads are detachably installed at the bottom of the four bases. The left mold and the right mold are slidably set on the base plate, and the mold core column is fixedly installed on the base plate. The left mold, the right mold and the mold core column are adapted to each other.

[0013] As a preferred embodiment of the present invention, a positioning seat is horizontally installed on the base plate, and a screw shaft is rotatably installed on the positioning seat. The screw shaft is provided with two screw threads with opposite rotation directions, and connecting plates are meshed on the two screw threads with different rotation directions. The two connecting plates are connected to the corresponding left mold and right mold. A rocker arm is installed at the end of the screw shaft, and a handle is installed on the rocker arm, and an anti-slip groove is provided on the handle.

[0014] As a preferred embodiment of the present invention, a positioning rod is installed on the surface of the left mold, and a positioning plate is installed on the surface of the right mold. The positioning plate is movably connected to the positioning rod. The side walls of the left mold and the right mold are both equipped with connecting seats for connecting bolts. Limiting rods are slidably provided on the left mold and the right mold, and the limiting rods are installed on the base plate. In addition, a liquid injection hole that is interconnected with the interior of the mold cavity is opened on the left mold.

[0015] As a preferred embodiment of the present invention, a transmission shaft is installed at the rotation center of the turntable and the adjustment roller. The transmission shaft movably passes through the mold core column and the base plate. A drive motor is installed at the bottom of the base plate, and the output end of the drive motor is interconnected with the transmission shaft.

[0016] As a preferred embodiment of the present invention, a limiting seat is slidingly provided on the side wall of the connecting rod, and the limiting seat is installed on the side wall of the mold core column. A limiting spring is sleeved on the connecting rod, and one end of the limiting spring is clamped on the limiting seat, and the other end of the limiting spring is clamped on the retracted plate. A sliding rod is installed at the end of the connecting rod, and the sliding rod is slidingly set in the cut-in groove.

[0017] As a preferred embodiment of the present invention, a synchronization rod is installed on the connecting rod, and a slide is slidably provided on the synchronization rod. Two pull rods are installed at both ends of the slide, and slide seats are installed at the ends of the two pull rods. The two slide seats are located on the spring plates on both sides of the retracted plate, and a guide rail is slidably provided on the slide seat, and the guide rail is vertically installed on the inner wall of the spring plate.

[0018] As a preferred embodiment of the present invention, a straight groove is provided at the bottom of the spiral groove, the central angle corresponding to the straight groove corresponds to the central angle corresponding to the incision groove, the ring is sleeved on the outer wall of the adjusting roller, and a pair of sliders are fixedly installed on the inner wall of the ring, and the pair of sliders are slidably arranged inside the straight groove.

[0019] As a preferred embodiment of the present invention, the side wall of the collar is provided with a plurality of pairs of sockets, each socket is provided with a plug rod movably inserted therein, a synchronization plate is installed at the end of the plug rod, and the end of the synchronization plate is connected to the pull rod.

[0020] As a preferred embodiment of the present invention, a casting method of a grooved pulley casting mold comprises the following steps:

[0021] Step 1: Slide the left mold and the right mold to both sides of the mold core column through the screw shaft and the connecting plate, use the positioning rod, positioning plate and limit rod to position them, and fix them through the connecting seat to form a mold cavity;

[0022] Step 2: inject casting liquid from the injection hole and cool it to solidify;

[0023] Step 3: Turn the screw shaft to open the left and right molds, and position the workpiece with the mold core column;

[0024] Step 4: Start the driving motor to drive the turntable and the adjusting roller to rotate. The turntable cuts into the groove and pushes the connecting rod to separate the inner shrink plate from the inner groove wall of the workpiece. At the same time, the spring plate is pulled apart from the outer groove wall. When the turntable rotates to the circular groove, the spiral groove of the adjusting roller drives the pull rod to slide vertically, changing the deformation position of the spring plate, and gradually completing the demoulding.

[0025] Step 5: Reset the left and right molds for the next round of casting.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] In terms of workpiece forming and mold protection, the present invention uses retracted plates evenly distributed across the side walls of the core column to achieve localized and gradual separation of the core from the workpiece, avoiding workpiece deformation due to uneven force and effectively ensuring the molding quality of the grooved pulley. At the same time, through the coordinated design of the adjusting roller, collar, and spring plate, the spring plate's deformation position gradually changes, avoiding the impact force generated by the instantaneous separation of the workpiece and core, and preventing mold core damage caused by concentrated demolding stress. This innovative design not only ensures high-precision forming of the workpiece, but also significantly improves the durability of the mold, reducing production losses and costs caused by workpiece defects and mold damage, achieving a dual improvement in workpiece quality and mold life.

[0028] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In the attached figure:

[0030] Figure 1 The figure is a schematic diagram of the three-dimensional structure of a casting mold for a grooved pulley;

[0031] Figure 2 It is a bottom view of a casting mold for a grooved pulley;

[0032] Figure 3 It is a cross-sectional view of a mold body of a grooved pulley casting mold;

[0033] Figure 4 This is a structural diagram of a grooved pulley casting mold after the mold body is disassembled;

[0034] Figure 5 Cross-section of the core column of a grooved pulley casting mold Figure 1 ;

[0035] Figure 6 Cross-section of the core column of a grooved pulley casting mold Figure 2 ;

[0036] Figure 7 A casting mold for a grooved pulley Figure 6 Enlarged view of point A in the middle;

[0037] Figure 8 This is a partial view of a casting mold for a grooved pulley;

[0038] Figure 9 A casting mold for a grooved pulley Figure 8 Enlarged view of point B in the middle;

[0039] Figure 10 This is a partial assembly drawing of a casting mold for a grooved pulley.

[0040] In the picture:

[0041] 1. Base plate; 11. Base; 111. Anti-slip pad; 12. Screw shaft; 121. Positioning seat; 122. Rocker arm; 123. Handle; 124. Connecting plate; 125. Limit rod; 126. Connecting seat;

[0042] 2. Mold body; 21. Left mold; 211. Positioning rod; 212. Injection hole; 22. Right mold; 221. Positioning plate; 23. Mold core column; 231. Retracting plate; 232. Spring plate;

[0043] 3. Turntable; 31. Drive motor; 311. Transmission shaft; 32. Combination groove; 321. Cut-in groove; 322. Annular groove; 33. Connecting rod; 331. Sliding rod; 332. Limit seat; 333. Limit spring; 334. Synchronous rod;

[0044] 4. Adjusting roller; 41. Spiral groove; 411. Linear groove; 42. Ring; 421. Slider; 43. Insert rod; 431. Synchronous plate; 432. Pull rod; 433. Slide seat; 434. Guide rail; 435. Slide plate. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0046] Example 1, as Figures 1 to 10 As shown, a casting mold for a grooved pulley includes a base plate 1 and an adapted mold body 2.

[0047] The mold body 2 includes a left mold 21, a right mold 22 and a mold core column 23 placed on the base plate 1;

[0048] Several pairs of inward-retracting plates 231 and spring plates 232 are staggeredly installed on the side walls of the mold core column 23;

[0049] The core column 23 is provided with a coaxially connected turntable 3 and an adjusting roller 4;

[0050] A combination groove 32 is provided on the turntable 3, and the combination groove 32 includes an annular groove 322. An inclined cutting groove 321 is provided on the outer side of the annular groove 322. A connecting rod 33 connected to the retracting plate 231 slides on the cutting groove 321. The connecting rod 33 is also connected to a pull rod 432 connected to the spring plate 232. The rotating cutting groove 321 guides the connecting rod 33 to slide horizontally, thereby causing the retracting plate 231 to retract and separate from the workpiece, and also causes the pull rod 432 to pull the spring plate 232 to elastically deform and separate from the workpiece.

[0051] A spiral groove 41 is formed on the adjusting roller 4 , and a collar 42 is engaged with the spiral groove 41 . The collar 42 is used to drive the pull rod 432 to slide vertically, thereby changing the deformation position of the spring plate 232 .

[0052] The above structural design brings significant advantages. Compared with traditional molds, the present invention realizes the layered and gradual demolding of the grooved pulley through the synergistic effect of the retracted plate 231 and the spring plate 232. Traditional molds are prone to uneven force during overall demolding, which can easily cause defects such as deformation and cracks in the pulley. However, the staggered retracted plates 231 in this mold can achieve partial separation between the mold core and the workpiece first, greatly reducing the demolding stress and effectively ensuring the dimensional accuracy and surface quality of the pulley. At the same time, this design avoids damage to the mold caused by excessive demolding impact force, greatly reducing the cost of mold replacement and maintenance during the production process.

[0053] like Figures 1 to 10 As shown, in a specific embodiment, four bases 11 are mounted on the bottom of the base plate 1. Each of the four bases 11 has a removable anti-slip pad 111 mounted on the bottom. The left mold 21 and the right mold 22 are slidably mounted on the base plate 1, and the mold core column 23 is fixedly mounted on the base plate 1. The left mold 21, the right mold 22, and the mold core column 23 are mutually adapted. The removable anti-slip pad 111 design allows for flexible replacement according to different production sites and equipment requirements, enhancing the stability of mold placement, effectively avoiding casting deviations caused by mold shaking, and further improving the stability of product quality.

[0054] like Figures 1 to 10 As shown, further, a positioning seat 121 is horizontally mounted on the base plate 1, and a screw shaft 12 is rotatably mounted on the positioning seat 121. The screw shaft 12 is provided with two screw threads with opposite rotation directions, and a connecting plate 124 is provided on the screw threads of the two rotation directions. The two connecting plates 124 are interconnected with the corresponding left mold 21 and right mold 22. A rocker arm 122 is installed at the end of the screw shaft 12, and a handle 123 is installed on the rocker arm 122, and an anti-slip groove is provided on the handle 123. This structure realizes the precise and convenient opening and closing of the left mold 21 and the right mold 22. The operator can easily control the sliding distance of the molds on both sides by rotating the screw shaft 12 through the rocker arm 122. Compared with the traditional manual opening and closing method, not only is the operation more labor-saving, but the positioning accuracy is also higher, which effectively improves the production efficiency and product consistency.

[0055] Example 2, based on Example 1, is different from this example in that: Figures 1 to 10As shown, a positioning rod 211 is installed on the surface of the left mold 21, and a positioning plate 221 is installed on the surface of the right mold 22. The positioning plate 221 is movably connected to the positioning rod 211. The side walls of the left mold 21 and the right mold 22 are both installed with a connecting seat 126 for connecting bolts. A limiting rod 125 is slidably provided on the left mold 21 and the right mold 22, and the limiting rod 125 is installed on the base plate 1. In addition, the left mold 21 is provided with an injection hole 212 that is interconnected with the interior of the mold cavity. The plug-in cooperation between the positioning rod 211 and the positioning plate 221, as well as the limiting effect of the limiting rod 125, further enhances the stability and accuracy of the mold during mold closing, effectively preventing the shape deviation of the pulley caused by mold misalignment during the casting process. At the same time, the reasonable arrangement of the injection hole 212 enables the casting liquid to evenly and quickly fill the mold cavity, avoiding casting defects such as air holes and shrinkage caused by poor injection, thereby improving the product yield.

[0056] like Figures 1 to 10 As shown, in a specific embodiment, a drive shaft 311 is mounted at the rotational center of the turntable 3 and the adjustment roller 4. The drive shaft 311 movably extends through the mold core column 23 and the base plate 1. A drive motor 31 is mounted at the bottom of the base plate 1, and the output end of the drive motor 31 is interconnected with the drive shaft 311. The drive motor 31 provides a stable and powerful power source for the mold demolding operation. By precisely controlling the motor's speed and direction, the demolding process can be precisely controlled, ensuring that the retracted plate 231 and the spring plate 232 complete the demolding action in a predetermined order and speed, thereby improving the automation and reliability of the production process.

[0057] like Figures 1 to 10 As shown, a limit seat 332 is slidably provided on the side wall of the connecting rod 33. The limit seat 332 is mounted on the side wall of the mold core column 23. A limit spring 333 is sleeved on the connecting rod 33. One end of the limit spring 333 is clamped on the limit seat 332, and the other end of the limit spring 333 is clamped on the retracting plate 231. A slide rod 331 is mounted on the end of the connecting rod 33, and the slide rod 331 is slidably disposed in the cut-in groove 321. The provision of the limit spring 333 provides a buffering function for the movement of the retracting plate 231. When demolding is completed, the limit spring 333 can automatically reset the retracting plate 231 to prepare for the next casting, reducing manual intervention and improving production efficiency.

[0058] Example 3, based on Example 2 and different from this example: Figures 1 to 10As shown, a synchronization rod 334 is mounted on the connecting rod 33. A slide 435 is slidably mounted on the synchronization rod 334. Two pull rods 432 are mounted at each end of the slide 435. Each pull rod 432 has a slide 433 mounted at its end. The two slides 433 are positioned on the spring plates 232 on either side of the retracted plate 231. Guide rails 434 are slidably mounted on the slides 433. The guide rails 434 are vertically mounted on the inner sidewalls of the spring plates 232. This structure ensures stable vertical sliding and precise control of the spring plates 232. The coordinated operation of the synchronization rod 334, slide 435, and other components ensures the synchronized movement of the spring plates 232 on both sides, ensuring uniform force on the pulleys during demolding, further improving product demolding quality and production stability.

[0059] like Figures 1 to 10 As shown, in a specific embodiment, a linear groove 411 is provided at the bottom of the spiral groove 41. The central angle corresponding to the linear groove 411 corresponds to the central angle corresponding to the incision groove 321. The collar 42 is sleeved on the outer wall of the adjusting roller 4, and a pair of sliders 421 are fixedly mounted on the inner wall of the collar 42. The pair of sliders 421 are slidably arranged within the linear groove 411. This ingenious structural design achieves precise coordination between the movement of the adjusting roller 4 and the turntable 3. During the demolding process, when the incision groove 321 of the turntable 3 drives the connecting rod 33 to slide horizontally, the slider 421 of the collar 42 slides within the linear groove 411, avoiding unnecessary vertical movement. When the turntable 3 rotates to the annular groove 322, the spiral groove 41 of the adjusting roller 4 drives the collar 42 to slide vertically, thereby achieving precise adjustment of the deformation position of the spring plate 232 and ensuring the orderly and efficient completion of the demolding process.

[0060] like Figures 1 to 10 As shown, the sidewall of the collar 42 is further defined by several pairs of sockets, each of which is movably fitted with a rod 43. A synchronization plate 431 is mounted at the end of the rod 43, which is then interconnected with a pull rod 432. This design provides a more flexible and reliable connection between the collar 42 and the pull rod 432. By adjusting the position of the rod 43 within the socket, the initial position and deformation range of the spring plate 232 can be quickly adjusted to suit pulley specifications. This enhances the mold's adaptability to different products, improving its versatility and production flexibility.

[0061] The present invention also discloses a casting method of a grooved pulley casting mold, which comprises the following steps:

[0062] Step 1: Slide the left mold 21 and the right mold 22 to both sides of the mold core column 23 through the screw shaft 12 and the connecting plate 124, use the positioning rod 211, the positioning plate 221 and the limit rod 125 to position them, and fix them through the connecting seat 126 to form a mold cavity;

[0063] Step 2: inject casting liquid from the injection hole 212 and cool and solidify;

[0064] Step 3: Rotate the screw shaft 12 to open the left mold 21 and the right mold 22, and the mold core column 23 positions the workpiece;

[0065] Step 4: Start the driving motor 31 to drive the turntable 3 and the adjusting roller 4 to rotate. The turntable 3 cuts into the groove 321 and pushes the connecting rod 33 to separate the retracted plate 231 from the inner groove wall of the workpiece, and at the same time pulls the spring plate 232 from the outer groove wall. When the turntable 3 rotates to the annular groove 322, the spiral groove 41 of the adjusting roller 4 drives the collar 42 to drive the pull rod 432 to slide vertically, changing the deformation position of the spring plate 232, and gradually completing the demolding.

[0066] Step 5: Reset the left mold 21 and the right mold 22 to proceed to the next round of casting.

[0067] The implementation principle of a grooved pulley casting mold of the present invention is as follows:

[0068] When casting a grooved pulley, the left mold 21 and the right mold 22 are first slid to appropriate positions on both sides of the mold core column 23 through the cooperation of the screw shaft 12 and the connecting plate 124. The mold positions are initially determined by the insertion of the positioning rod 211 and the positioning plate 221, and the sliding limit of the left mold 21 and the right mold 22 by the limiting rod 125. The left mold 21 and the right mold 22 are then fixed with bolts through the connecting seat 126 to form a closed casting mold cavity. Casting liquid is injected into the mold cavity through the liquid injection hole 212, and the casting liquid is cooled and solidified to form a shape.

[0069] After the casting liquid solidifies and forms, the rocker arm 122 rotates the screw shaft 12, and the screw threads on the screw shaft 12 rotate in opposite directions, driving the connecting plate 124 to slide the left mold 21 and the right mold 22 open in opposite directions. At this time, the mold core column 23 positions the formed grooved pulley product, preventing it from shifting or tipping due to the separation of the left and right molds, and ensuring the stability and safety of the subsequent demolding operation.

[0070] Subsequently, the drive motor 31 is started, and the drive motor 31 drives the transmission shaft 311 to rotate, thereby causing the turntable 3 and the adjustment roller 4 coaxially connected to the transmission shaft 311 to rotate synchronously. When the turntable 3 rotates, the cut-in groove 321 in its combined groove 32 guides the slide bar 331 on the connecting rod 33, pushing the connecting rod 33 to slide horizontally, causing the retracted plate 231 to retract toward the center of the core column 23, thereby separating from the inner groove wall of the workpiece; at the same time, the connecting rod 33 pulls the spring plate 232 through the pull rod 432 to elastically deform, causing the spring plate 232 to also separate from the outer groove wall of the workpiece. Compared with the traditional method of separating the mold core and the workpiece through jacking operation, this design of staggered and evenly distributed retracted plates 231 can avoid the problem of workpiece deformation caused by the large contact area between the mold core and the workpiece and uneven force during demolding, and realizes the partial and gradual separation of the mold core and the workpiece, effectively protecting the molding quality of the workpiece.

[0071] When the connecting rod 33 of the turntable 3 slides in the cut-in groove 321, the guiding effect of the cut-in groove 321 causes the connecting rod 33 to slide horizontally. The central angle of the linear groove 411, which connects to the bottom of the spiral groove 41 on the adjusting roller 4, corresponds to the central angle of the cut-in groove 321. The slider 421 on the inner wall of the collar 42 slides within the linear groove 411 and is not driven vertically by the spiral groove 41. As the connecting rod 33 slides in the annular groove 322 of the turntable 3, there is no horizontal guiding force from the cut-in groove 321. As the adjusting roller 4 continues to rotate, its spiral groove 41 engages with the slider 421 on the inner wall of the collar 42, driving the collar 42 to slide vertically along the axis of the adjusting roller 4. The collar 42 drives the pull rod 432 to slide vertically via the insert rod 43 and the synchronizing plate 431, thereby changing the deformation position of the spring plate 232, causing it to gradually separate from the workpiece at different heights. The design of the gradual change in the deformation position of the spring plate 232 can avoid the impact force caused by the instantaneous separation of the workpiece and the mold core, prevent the mold core from being damaged due to the concentrated demolding stress, and significantly improve the service life of the mold and the stability of production while ensuring the smooth demolding of the workpiece.

[0072] After demoulding is completed, the left mold 21 and the right mold 22 can be reset to perform the next round of casting operation.

Claims

1. A casting mold for a grooved pulley, comprising a base plate (1) and a matching mold body (2), characterized in that: The mold body (2) comprises a left mold (21), a right mold (22) and a mold core column (23) placed on the base plate (1); The side wall of the mold core column (23) is staggeredly provided with a plurality of pairs of inwardly contracted plates (231) and spring plates (232); The mold core column (23) is provided with a coaxially connected turntable (3) and an adjusting roller (4); The turntable (3) is provided with a combination groove (32), and the combination groove (32) includes an annular groove (322), and an incision groove (321) in an inclined position is provided on the outer side of the annular groove (322), and a connecting rod (33) connected to the retracting plate (231) is slidably provided on the incision groove (321), and a pull rod (432) connected to the spring plate (232) is also connected to the connecting rod (33), and the rotating incision groove (321) guides the connecting rod (33) to slide horizontally, thereby causing the retracting plate (231) to retract and separate from the workpiece, and also causing the pull rod (432) to pull the spring plate (232) to elastically deform and separate from the workpiece; The regulating roller (4) is provided with a spiral groove (41), the spiral groove (41) is engaged with a collar (42), and the collar (42) is used to drive the pull rod (432) to slide vertically, thereby changing the deformation position of the spring plate (232).

2. A casting mold for a grooved pulley according to claim 1, characterized in that: Four bases (11) are installed at the bottom of the base plate (1), and anti-slip pads (111) are detachably installed at the bottom of each of the four bases (11). The left mold (21) and the right mold (22) are slidably arranged on the base plate (1), and the mold core column (23) is fixedly installed on the base plate (1). The left mold (21), the right mold (22) and the mold core column (23) are adapted to each other.

3. A casting mold for a grooved pulley according to claim 2, characterized in that: A positioning seat (121) is horizontally mounted on the base plate (1), a screw shaft (12) is rotatably mounted on the positioning seat (121), two screw threads with opposite rotation directions are provided on the screw shaft (12), and connecting plates (124) are meshed on the two screw threads with opposite rotation directions, the two connecting plates (124) are connected to the corresponding left mold (21) and right mold (22), a rocker arm (122) is mounted on the end of the screw shaft (12), a handle (123) is mounted on the rocker arm (122), and an anti-slip groove is provided on the handle (123).

4. A casting mold for a grooved pulley according to claim 3, characterized in that: A positioning rod (211) is installed on the surface of the left mold (21), and a positioning plate (221) is installed on the surface of the right mold (22). The positioning plate (221) is movably connected to the positioning rod (211). The side walls of the left mold (21) and the right mold (22) are both installed with a connecting seat (126) for connecting bolts. The left mold (21) and the right mold (22) are slidably provided with a limiting rod (125), and the limiting rod (125) is installed on the base plate (1). The left mold (21) is provided with a liquid injection hole (212) that is interconnected with the interior of the mold cavity.

5. A casting mold for a grooved pulley according to claim 4, characterized in that: A transmission shaft (311) is installed at the rotation center of the turntable (3) and the regulating roller (4), and the transmission shaft (311) movably penetrates the mold core column (23) and the base plate (1). A driving motor (31) is installed at the bottom of the base plate (1), and the output end of the driving motor (31) is connected to the transmission shaft (311).

6. A casting mold for a grooved pulley according to claim 5, characterized in that: A limiting seat (332) is slidingly provided on the side wall of the connecting rod (33), and the limiting seat (332) is installed on the side wall of the mold core column (23). A limiting spring (333) is sleeved on the connecting rod (33), and one end of the limiting spring (333) is clamped on the limiting seat (332), and the other end of the limiting spring (333) is clamped on the retracted plate (231). A sliding rod (331) is installed at the end of the connecting rod (33), and the sliding rod (331) is slidably provided in the cut-in groove (321).

7. A casting mold for a grooved pulley according to claim 6, characterized in that: A synchronization rod (334) is installed on the connecting rod (33), and a slide plate (435) is slidably provided on the synchronization rod (334). Two pull rods (432) are installed at both ends of the slide plate (435), and a slide seat (433) is installed at the end of each of the two pull rods (432). The two slide seats (433) are located on the spring plates (232) on both sides of the retracted plate (231), and a guide rail (434) is slidably provided on the slide seat (433). The guide rail (434) is vertically installed on the inner wall of the spring plate (232).

8. The casting mold for a grooved pulley according to claim 7, characterized in that: The bottom of the spiral groove (41) is connected to a linear groove (411), the central angle of the linear groove (411) corresponds to the central angle of the cut-in groove (321), the collar (42) is sleeved on the outer wall of the regulating roller (4), and a pair of sliders (421) are fixedly mounted on the inner wall of the collar (42), and the pair of sliders (421) are slidably arranged inside the linear groove (411).

9. The casting mold for a grooved pulley according to claim 8, characterized in that: The side wall of the collar (42) is provided with a plurality of pairs of sockets, each socket having an insert rod (43) movably inserted therein, a synchronization plate (431) being installed at the end of the insert rod (43), and the end of the synchronization plate (431) being connected to the pull rod (432).

10. A method for casting a grooved pulley, characterized in that: The casting method of the grooved pulley casting mold according to claim 9 comprises the following steps: Step 1: Slide the left mold (21) and the right mold (22) to both sides of the mold core column (23) through the screw shaft (12) and the connecting plate (124), use the positioning rod (211), the positioning plate (221) and the limit rod (125) to position them, and fix them through the connecting seat (126) to form a mold cavity; Step 2: injecting casting liquid from the liquid injection hole (212) and cooling and solidifying; Step 3: Turn the screw shaft (12) to open the left and right molds, and the mold core column (23) positions the workpiece; Step 4: Start the driving motor (31) to drive the turntable (3) and the regulating roller (4) to rotate, the turntable (3) cuts into the groove (321) to push the connecting rod (33) to separate the inner retracted plate (231) from the inner groove wall of the workpiece, and at the same time pull the spring plate (232) to separate from the outer groove wall. When the turntable (3) rotates to the annular groove (322), the spiral groove (41) of the regulating roller (4) drives the collar (42) to drive the pull rod (432) to slide vertically, changing the deformation position of the spring plate (232), and gradually completing the demoulding; Step 5: Reset the left and right molds for the next round of casting.

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