Grooved belt pulley casting mold and casting method thereof

Abstract

The invention relates to the technical field of belt pulley casting molds, and discloses a grooved belt pulley casting mold and a casting method thereof.The grooved belt pulley casting mold comprises a base plate and a mold body matched with the base plate, and a rotary disc and an adjusting roller which are coaxially connected are installed on a mold core column. In the aspects of workpiece forming and mold protection, the mold core and a workpiece are locally and gradually separated through the inward shrinkage plates which are evenly distributed on the side wall of the mold core column in a staggered mode, the problem of workpiece deformation caused by uneven stress is avoided, and the forming quality of the belt pulley with the groove is effectively guaranteed; meanwhile, through the linkage design of the adjusting roller, the lantern ring and the elastic plate, the deformation position of the elastic plate is gradually changed, impact force generated by instant separation of the workpiece and the mold core is avoided, and mold core damage caused by demolding stress concentration is prevented. According to the innovative design, high-precision forming of the workpiece is guaranteed, the durability of the die is remarkably improved, production loss and cost caused by poor workpieces and die damage are reduced, and the quality of the workpiece and the service life of the die are both improved.

Description

Technical Field

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

[0002] The grooved belt pulley casting mold is a special tool for manufacturing belt pulleys and occupies an important position in the production of mechanical transmission components. Its quality and performance directly affect the accuracy, strength, and surface quality of the belt pulley, and thus are related to the transmission efficiency and stability of mechanical equipment.

[0003] In the demolding process of traditional grooved belt pulley casting molds, most of them adopt the method of jacking up the core to separate the core from the workpiece. However, due to the large contact area between the core and the formed grooved belt pulley, it is very easy to have uneven stress during the jacking process, resulting in deformation of the workpiece, seriously affecting the dimensional accuracy and surface quality of the product, and reducing the product qualification rate. At the same time, the large impact force generated by instant demolding will damage the core, causing problems such as wear and cracking of the mold, which not only increases the maintenance cost of the mold, but also greatly affects the production efficiency by frequently replacing the mold and prolongs the production cycle.

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

[0005] To solve the technical problems that in the demolding process of traditional grooved belt pulley casting molds, most of them adopt the method of jacking up the core to separate the core from the workpiece. However, due to the large contact area between the core and the formed grooved belt pulley, it is very easy to have uneven stress during the jacking process, resulting in deformation of the workpiece, seriously affecting the dimensional accuracy and surface quality of the product, and reducing the product qualification rate. At the same time, the large impact force generated by instant demolding will damage the core, causing problems such as wear and cracking of the mold, which not only increases the maintenance cost of the mold, but also greatly affects the production efficiency by frequently replacing the mold and prolongs the production cycle, the basic concept of the technical solution adopted by the present invention is:

[0006] A grooved belt pulley casting mold includes a base plate and a matching mold body.

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

[0008] A number of pairs of retractable plates and elastic plates are alternately installed on the side wall of the core column;

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

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

[0011] The adjusting roller is provided with a spiral groove, the spiral groove is meshed with a collar, and the collar is used to drive the pull rod to slide vertically to 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, and 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, and 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 arranged on the left mold and the right mold, and the limiting rods are installed on the base plate. The left mold is provided with an injection hole that is interconnected with the interior of the mold cavity.

[0015] As a preferred embodiment of the present invention, a transmission shaft is installed at the rotation center of the turntable and the adjusting 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. 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 slidably 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, 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 slidably set in the cut-in groove.

[0017] As a preferred embodiment of the present invention, a synchronizing rod is installed on the connecting rod. A sliding plate is slidably arranged on the synchronizing rod. Two pull rods are installed at both ends of the sliding plate. Sliding seats are installed at the ends of the two pull rods. The two sliding seats are located on the elastic plates on both sides of the retracting plate. A guide rail is slidably arranged on the sliding seat, and the guide rail is vertically installed on the inner side wall of the elastic plate.

[0018] As a preferred embodiment of the present invention, a straight groove is communicated with the bottom of the spiral groove. The central angle corresponding to the straight groove corresponds to the central angle corresponding to the cutting groove. The collar is sleeved on the outer side wall of the adjusting roller, and a pair of sliders are fixedly installed on the inner side wall of the collar. The pair of sliders are slidably arranged inside the straight groove.

[0019] As a preferred embodiment of the present invention, a plurality of pairs of insertion holes are formed in the side wall of the collar. A plug rod is movably inserted into each insertion hole. A synchronizing plate is installed at the end of the plug rod, and the end of the synchronizing plate is connected to the pull rod.

[0020] As a preferred embodiment of the present invention, a casting method for a grooved pulley casting mold is as follows:

[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, position them by using the positioning rod, the positioning plate and the limiting rod, and fix them through the connecting seat to form a mold cavity;

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

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

[0024] Step 4: Start the driving motor to drive the turntable and the adjusting roller to rotate. The cutting groove of the turntable pushes the connecting rod to separate the retracting plate from the inner groove wall of the workpiece, and at the same time pulls the elastic plate to separate from the outer groove wall. When the turntable rotates to the circular ring groove, the spiral groove of the adjusting roller drives the collar to drive the pull rod to slide vertically, changing the deformation position of the elastic plate, and gradually completing the demolding;

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

[0026] The present invention has the following beneficial effects compared with the prior art:

[0027] In terms of workpiece forming and mold protection, the present invention enables the mold core and the workpiece to be gradually separated locally through the retractable plates evenly distributed in a staggered manner on the side wall of the mold core column, 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 collar and the elastic plate, the deformation position of the elastic plate gradually changes, 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 concentrated 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 losses and costs caused by defective workpieces and mold damage, and realizes the double improvement of workpiece quality and mold life.

[0028] The following further describes in detail the specific implementation manners of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In the drawings:

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

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

[0032] Figure 3 is a sectional view of the mold body of a casting mold for a grooved pulley;

[0033] Figure 4 is a structural diagram of the split mold body of a casting mold for a grooved pulley;

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

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

[0036] Figure 7 is a Figure 6 magnified view of part A in a casting mold for a grooved pulley;

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

[0038] Figure 9 is a Figure 8 magnified view of part B in a casting mold for a grooved pulley;

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

[0040] In the figure:

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

[0042] 2. Mold body; 21. Left mold; 211. Positioning rod; 212. Liquid injection hole; 22. Right mold; 221. Positioning plate; 23. Mold core column; 231. Retracted plate; 232. Elastic plate;

[0043] 3. Turntable; 31. Driving motor; 311. Transmission shaft; 32. Combination groove; 321. Cutting groove; 322. Circular groove; 33. Connecting rod; 331. Slide bar; 332. Limiting seat; 333. Limiting spring; 334. Synchronous rod;

[0044] 4. Adjusting roller; 41. Spiral groove; 411. Linear groove; 42. Collar; 421. Slide block; 43. Insert rod; 431. Synchronous plate; 432. Pull rod; 433. Slide seat; 434. Guide rail; 435. Slide plate. Detailed implementation manners

[0045] To make the objectives, 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 with reference to the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0046] Embodiment 1, as Figures 1 to 10 shown, a grooved pulley casting mold includes a substrate 1 and a matching 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 substrate 1;

[0048] A number of pairs of retracted plates 231 and elastic plates 232 are alternately installed on the side wall of the mold core column 23;

[0049] A turntable 3 and an adjusting roller 4 are coaxially connected and installed on the mold core column 23;

[0050] A combination groove 32 is formed on the turntable 3, and the combination groove 32 includes a circular groove 322. An inclined cutting groove 321 is formed outside the circular groove 322. A connecting rod 33 connected to the retracted plate 231 slides on the cutting groove 321, and a pull rod 432 connected to the elastic plate 232 is further connected to the connecting rod 33. The rotating cutting groove 321 guides the horizontal sliding of the connecting rod 33, so that the retracted plate 231 retracts and separates from the workpiece, and also makes the pull rod 432 pull the elastic plate 232 to generate elastic deformation and separate from the workpiece;

[0051] The adjusting roller 4 is provided with a spiral groove 41, and a collar 42 is engaged with the spiral groove 41. The collar 42 is used to drive the vertical sliding of the pull rod 432 and change the deformation position of the elastic 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 retracting plate 231 and the elastic plate 232. Due to uneven stress during overall demolding in traditional molds, defects such as deformation and cracks are likely to occur in the pulley. In this mold, the staggered retracting plates 231 can enable the mold core and the workpiece to be partially separated first, greatly reducing the demolding stress, 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, and significantly reduces the mold replacement and maintenance costs during the production process.

[0053] As Figures 1 to 10 shown, in the specific embodiment, four pedestals 11 are installed at the bottom of the substrate 1, and anti-slip pads 111 are detachably installed at the bottoms of the four pedestals 11. The left mold 21 and the right mold 22 are slidably arranged on the substrate 1, and the mold core column 23 is fixedly installed on the substrate 1. The left mold 21, the right mold 22 and the mold core column 23 are mutually adapted. The design of the detachable anti-slip pads 111 can be flexibly replaced according to different production sites and equipment requirements, enhancing the stability of the mold placement, effectively avoiding casting deviations caused by mold shaking, and further improving the stability of product quality.

[0054] As Figures 1 to 10 shown, further, a positioning seat 121 is horizontally installed on the substrate 1. A lead screw shaft 12 is rotatably installed on the positioning seat 121. Two lead screw threads with opposite helix directions are provided on the lead screw shaft 12, and connecting plates 124 are engaged with the two lead screw threads with opposite helix directions. The two connecting plates 124 are connected to the corresponding left mold 21 and right mold 22 respectively. A rocker arm 122 is installed at the end of the lead 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 two molds by rotating the lead screw shaft 12 through the rocker arm 122. Compared with the traditional manual opening and closing method, it is not only more labor-saving in operation, but also has higher positioning accuracy, effectively improving the production efficiency and product consistency.

[0055] Embodiment 2, different from Embodiment 1 in that: As Figures 1 to 10As shown in the figure, 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 inserted into the positioning rod 211. Connecting seats 126 for connecting bolts are installed on the side walls of both the left mold 21 and the right mold 22. A limiting rod 125 is slidably arranged on the left mold 21 and the right mold 22, and the limiting rod 125 is installed on the substrate 1. A liquid injection hole 212 communicating with the inside of the mold cavity is opened on the left mold 21. The insertion fit between the positioning rod 211 and the positioning plate 221, as well as the limiting effect of the limiting rod 125, further enhance the stability and accuracy when the mold is closed, effectively preventing the shape deviation of the pulley caused by the misalignment of the mold during the casting process. At the same time, the reasonable setting of the liquid injection hole 212 enables the casting liquid to uniformly and quickly fill the mold cavity, avoiding casting defects such as air holes and shrinkage porosity caused by poor liquid injection, and improving the yield rate of the product.

[0056] As Figures 1 to 10 shown, in the specific implementation manner, a transmission shaft 311 is installed at the rotation centers of the turntable 3 and the adjusting roller 4. The transmission shaft 311 movably penetrates through the mold core column 23 and the substrate 1. A driving motor 31 is installed at the bottom of the substrate 1, and the output end of the driving motor 31 is connected to the transmission shaft 311. The driving motor 31 provides a stable and powerful power source for the demolding operation of the mold. By precisely controlling the rotation speed and direction of the motor, the precise control of the demolding process can be achieved, ensuring that the inner retracting plate 231 and the elastic plate 232 complete the demolding action in accordance with the predetermined sequence and speed, improving the automation degree and reliability of the production process.

[0057] As Figures 1 to 10 shown, further, a limiting seat 332 is slidably arranged on the side wall of the connecting rod 33. 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. 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 inner retracting plate 231. A sliding rod 331 is installed at the end of the connecting rod 33, and the sliding rod 331 is slidably arranged in the cutting groove 321. The setting of the limiting spring 333 provides a buffering function for the movement of the inner retracting plate 231. When the demolding is completed, the limiting spring 333 can automatically reset the inner retracting plate 231, preparing for the next casting, reducing manual intervention, and improving the production efficiency.

[0058] Example 3. The difference between this example and Example 2 is: As Figures 1 to 10As shown in the figure, a synchronizing rod 334 is installed on the connecting rod 33. A sliding plate 435 is slidably arranged on the synchronizing rod 334. Two pull rods 432 are installed at both ends of the sliding plate 435. Sliding seats 433 are installed at the ends of the two pull rods 432. The two sliding seats 433 are located on the elastic plates 232 on both sides of the retracting plate 231. A guide rail 434 is slidably arranged on the sliding seat 433. The guide rail 434 is vertically installed on the inner side wall of the elastic plate 232. This structure realizes the stable sliding and precise control of the elastic plate 232 in the vertical direction. Through the linkage of components such as the synchronizing rod 334 and the sliding plate 435, it can ensure that the elastic plates 232 on both sides move synchronously, making the pulley receive uniform force during the demolding process, further improving the demolding quality of the product and the production stability.

[0059] As Figures 1 to 10 shown, in the specific implementation manner, a linear groove 411 is communicated 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 cutting groove 321. The collar 42 is sleeved on the outer side wall of the adjusting roller 4, and a pair of sliders 421 are fixedly installed on the inner side wall of the collar 42. The pair of sliders 421 are slidably arranged inside the linear groove 411. This ingenious structural design realizes the precise cooperation between the adjusting roller 4 and the turntable 3. During the demolding process, when the cutting groove 321 of the turntable 3 drives the connecting rod 33 to slide horizontally, the slider 421 of the collar 42 slides in the linear groove 411, avoiding unnecessary vertical movement; when the turntable 3 rotates to the circular ring groove 322, the spiral groove 41 of the adjusting roller 4 drives the collar 42 to slide vertically, so as to realize the precise adjustment of the deformation position of the elastic plate 232, ensuring the orderly progress and efficient completion of the demolding process.

[0060] As Figures 1 to 10 shown, further, a number of pairs of insertion holes are formed on the side wall of the collar 42. A plug rod 43 is movably inserted into each insertion hole. A synchronizing plate 431 is installed at the end of the plug rod 43. The end of the synchronizing plate 431 is connected to the pull rod 432. This design makes the connection between the collar 42 and the pull rod 432 more flexible and reliable. By adjusting the position of the plug rod 43 in the insertion hole, according to the requirements of different specifications of pulleys, the initial position and deformation range of the elastic plate 232 can be quickly changed, enhancing the adaptability of the mold to different products and improving the versatility and production flexibility of the mold.

[0061] The present invention also discloses a casting method for a grooved pulley casting mold, and the steps are as follows:

[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 rod shaft 12 and the connecting plate 124, position them by using the positioning rod 211, the positioning plate 221 and the limiting rod 125, and fix them through the connecting seat 126 to form a mold cavity;

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

[0064] Step 3: Rotate the lead 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 drive motor 31 to drive the turntable 3 and the adjusting roller 4 to rotate. The cutting groove 321 in the turntable 3 pushes the connecting rod 33 to separate the retractable plate 231 from the inner groove wall of the workpiece, and at the same time pulls the elastic plate 232 to separate from the outer groove wall. When the turntable 3 rotates to the circular ring 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 elastic plate 232, and gradually completing the demolding.

[0066] Step 5: Reset the left mold 21 and the right mold 22 for 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, first slide the left mold 21 and the right mold 22 to appropriate positions on both sides of the mold core column 23 through the cooperation of the lead screw shaft 12 and the connecting plate 124. Use the insertion of the positioning rod 211 and the positioning plate 221, and the sliding limit of the limiting rod 125 on the left mold 21 and the right mold 22 to initially determine the position of the mold, and then fix the left mold 21 and the right mold 22 with bolts through the connecting seat 126 to form a closed casting cavity. Pour the casting liquid into the cavity from the liquid injection hole 212, and wait for the casting liquid to cool and solidify.

[0069] When the casting liquid solidifies and forms, rotate the lead screw shaft 12 through the rocker arm 122, and use the lead screw threads with opposite helix directions on the lead screw shaft 12 to drive the connecting plate 124 to slide the left mold 21 and the right mold 22 in the reverse direction to open. At this time, the mold core column 23 positions the formed grooved pulley product to prevent the product from being displaced or toppled due to the separation of the left and right molds, ensuring the stability and safety of the subsequent demolding operation.

[0070] Subsequently, start the drive motor 31. The drive motor 31 drives the transmission shaft 311 to rotate, and further makes the turntable 3 and the adjusting roller 4 coaxially connected to the transmission shaft 311 rotate synchronously. When the turntable 3 rotates, the cutting groove 321 in its combined groove 32 guides the sliding rod 331 on the connecting rod 33, pushing the connecting rod 33 to slide horizontally, so that the retractable plate 231 retracts towards the center of the mold core column 23, thus separating from the inner groove wall of the workpiece; at the same time, the connecting rod 33 pulls the elastic plate 232 to deform elastically through the pull rod 432, so that the elastic plate 232 also separates from the outer groove wall of the workpiece. This design of the retractable plate 231 with staggered and uniform distribution, compared with the traditional method of separating the mold core and the workpiece through jacking operation, 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, realize the local and gradual separation of the mold core and the workpiece, and effectively protect the forming quality of the workpiece.

[0071] When the connecting rod 33 of the turntable 3 slides in the cutting groove 321, due to the guiding effect of the cutting groove 321 at this time, the connecting rod 33 slides horizontally. The central angle corresponding to the straight groove 411 communicated with the bottom of the spiral groove 41 on the adjusting roller 4 corresponds to the central angle corresponding to the cutting groove 321. The slider 421 on the inner side wall of the collar 42 slides in the straight groove 411 at this time and will not generate a vertical displacement due to the drive of the spiral groove 41. When the connecting rod 33 slides in the circular ring groove 322 of the turntable 3, there is no guiding force in the horizontal direction of the connecting rod 33 by the cutting groove 321 at this time. During the continuous rotation of the adjusting roller 4, its spiral groove 41 meshes with the slider 421 on the inner side wall of the collar 42, driving the collar 42 to slide vertically along the axial direction of the adjusting roller 4. The collar 42 drives the pull rod 432 to slide vertically through the insertion rod 43 and the synchronous plate 431, thereby changing the deformation position of the elastic plate 232, so that the elastic plate 232 is gradually separated from the workpiece at different height positions. This design with a gradually changing deformation position of the elastic plate 232 can avoid the impact force generated by the instantaneous separation of the workpiece from the mold core, prevent the mold core from being damaged due to the concentration of demoulding stress, and significantly improve the service life of the mold and the stability of production while ensuring the smooth demoulding of the workpiece.

[0072] After the 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 grooved pulley casting mold, comprising a base plate (1) and a matching mold body (2), characterized in that: 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); A number of pairs of retractable plates (231) and elastic plates (232) are alternately installed on the side wall of the mold core column (23); A turntable (3) and an adjusting roller (4) are coaxially connected and installed on the mold core column (23); A combination groove (32) is formed on the turntable (3), and the combination groove (32) includes an annular groove (322). An incision groove (321) in an inclined position is formed outside the annular groove (322). A connecting rod (33) connected to the retractable plate (231) slides on the incision groove (321), and a pull rod (432) connected to the elastic plate (232) is further connected to the connecting rod (33). The rotating incision groove (321) guides the horizontal sliding of the connecting rod (33), so that the retractable plate (231) retracts and separates from the workpiece, and also makes the pull rod (432) pull the elastic plate (232) to generate elastic deformation and separate from the workpiece; A spiral groove (41) is formed on the adjusting roller (4), and the spiral groove (41) meshes with a collar (42), and the collar (42) is used to drive the vertical sliding of the pull rod (432) to change the deformation position of the elastic plate (232).

2. The casting mold of a grooved pulley according to claim 1, wherein, Four pedestals (11) are installed at the bottom of the base plate (1), and anti-slip pads (111) are detachably installed at the bottoms of the four pedestals (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 mutually adapted.

3. The casting mold of a grooved pulley according to claim 1, wherein A positioning seat (121) is horizontally installed on the base plate (1), a lead screw shaft (12) is rotatably installed on the positioning seat (121), two lead screw threads with opposite helix directions are formed on the lead screw shaft (12), and two connecting plates (124) are engaged on the two lead screw threads with opposite helix directions. The two connecting plates (124) are respectively connected to the corresponding left mold (21) and right mold (22). A rocker arm (122) is installed at the end of the lead screw shaft (12), a handle (123) is installed on the rocker arm (122), and an anti-slip groove is formed on the handle (123).

4. A grooved pulley casting mold according to claim 1, characterized in that, A positioning rod (211) is installed on the surface of the left mold (21), a positioning plate (221) is installed on the surface of the right mold (22), the positioning plate (221) is movably inserted into the positioning rod (211), connecting seats (126) for connecting bolts are installed on the side walls of the left mold (21) and the right mold (22), a limiting rod (125) is slidably arranged on the left mold (21) and the right mold (22), and the limiting rod (125) is installed on the base plate (1). A liquid injection hole (212) communicating with the inside of the mold cavity is formed on the left mold (21).

5. The casting mold of a grooved pulley according to claim 1, characterized in that, A transmission shaft (311) is installed at the rotation centers of the turntable (3) and the adjusting roller (4). The transmission shaft (311) movably penetrates through the die core column (23) and the substrate (1). A driving motor (31) is installed at the bottom of the substrate (1), and the output end of the driving motor (31) is connected to the transmission shaft (311).

6. A grooved pulley casting mold according to claim 1, characterized in that, A limit seat (332) is slidably arranged on the side wall of the connecting rod (33). The limit seat (332) is installed on the side wall of the die 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 retracted plate (231). A sliding rod (331) is installed at the end of the connecting rod (33), and the sliding rod (331) is slidably arranged in the cutting groove (321).

7. A grooved pulley casting mold according to claim 1, characterized in that, A synchronizing rod (334) is installed on the connecting rod (33). A sliding plate (435) is slidably arranged on the synchronizing rod (334). Two pull rods (432) are installed at both ends of the sliding plate (435). Sliding seats (433) are installed at the ends of the two pull rods (432). The two sliding seats (433) are located on the elastic plates (232) on both sides of the retracted plate (231). A guide rail (434) is slidably arranged on the sliding seat (433), and the guide rail (434) is vertically installed on the inner side wall of the elastic plate (232).

8. A grooved pulley casting mold according to claim 1, characterized in that, A linear groove (411) is communicated with the bottom of the spiral groove (41). The central angle corresponding to the linear groove (411) corresponds to the central angle corresponding to the cutting groove (321). The collar (42) is sleeved on the outer side wall of the adjusting roller (4), and a pair of sliders (421) are fixedly installed on the inner side wall of the collar (42). The pair of sliders (421) are slidably arranged inside the linear groove (411).

9. The casting mold of a grooved pulley according to claim 1, characterized in that, A plurality of pairs of insertion holes are formed in the side wall of the collar (42). A plug rod (43) is movably inserted into each insertion hole. A synchronizing plate (431) is installed at the end of the plug rod (43), and the end of the synchronizing plate (431) is connected to the pull rod (432).

10. A casting method for a grooved pulley, characterized in that, Applied to a grooved pulley casting mold according to any one of claims 1 to 9, a casting method of the grooved pulley casting mold is as follows: Step 1: Slide the left mold (21) and the right mold (22) to both sides of the die core column (23) through the screw shaft (12) and the connecting plate (124), position them by using the positioning rod (211), the positioning plate (221) and the limiting rod (125), and fix them through the connecting seat (126) to form a mold cavity; Step 2: Inject casting liquid from the liquid injection hole (212) and cool and solidify it; Step 3: Rotate the screw shaft (12) to open the left and right molds, and the die core column (23) positions the workpiece; Step 4: Start the drive motor (31) to drive the turntable (3) and the adjusting roller (4) to rotate. The turntable (3) cuts into the groove (321) to push the connecting rod (33), separating the retractable plate (231) from the inner groove wall of the workpiece. At the same time, the elastic plate (232) is pulled away from the outer groove wall. When the turntable (3) rotates to the circular ring 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 elastic plate (232), and gradually completing the demolding; Step 5: Reset the left and right molds to perform the next round of casting.

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