Grinding wheel piece casting cooling demolding device and demolding method based on air pressure jacking

Abstract

The invention relates to the technical field of casting demolding, in particular to a grinding wheel piece casting cooling demolding device and demolding method.The grinding wheel piece casting cooling demolding device comprises a lifting plate and a fixing column fixedly installed on the lifting plate, a fixed mold is fixed to the end of the fixing column, a groove is formed in the bottom of the fixed mold, and a pneumatic pipe is fixed to the bottom of the fixed mold; the piston cylinder is fixedly mounted on the lifting plate, a hollow pipe penetrating through the air pressure pipe is rotationally mounted at the end of the piston cylinder, and an ejection plate is slidably mounted in the fixed mold; the rotation limiting mechanism is arranged in the air pressure pipe and connected with the ejection plate and the hollow pipe, and a temperature control pressurization assembly is further arranged in the air pressure pipe; the air pumping cooling mechanism is arranged on the piston cylinder and connected with the hollow pipe, and the air pumping cooling mechanism can pump air in the piston cylinder into the fixed mold when the hollow pipe rotates; according to the casting mold, the casting can be cooled firstly and then ejected out to be demolded, so that casting production is assisted.

Description

Technical Field

[0001] The invention relates to the technical field of casting demoulding, in particular to a grinding wheel casting cooling demoulding device and a demoulding method based on air pressure lifting. Background Art

[0002] Sand casting is a casting method that uses sand as the main molding material to prepare the mold. Sand casting is the most traditional casting method. Due to its own characteristics (not limited by the shape, size, complexity and alloy type of parts, short production cycle and low cost), sand casting is still the most widely used casting method in casting production, especially for single or small batch castings.

[0003] The production process mainly includes the selection and proportioning of raw materials, grinding of raw materials, and molding of grinding wheels. After the raw materials are ground, they need to be molded, which is usually done using a cold press or a hot press. During molding, it is necessary to pay attention to the control of pressure and temperature to ensure that the hardness and wear resistance of the final product can meet the use requirements.

[0004] As far as hot pressing is concerned, it is necessary to apply a certain pressure to the grinding wheel casting at a certain temperature, and the grinding wheel is heated and pressed to obtain the final product, which requires demolding after the grinding wheel is cooled. The existing cooling demolding usually takes away the heat through natural cooling or accelerated air circulation, and then ejects the mold. In this process, it is impossible to judge whether the cooling is completed. The mold may be ejected before the cooling is completed, resulting in damage to the grinding wheel, or the cooling is completed but the mold is not demolded in time, resulting in reduced subsequent production efficiency. Summary of the invention

[0005] The object of the present invention is to provide a grinding wheel casting cooling demoulding device and demoulding method based on air pressure lifting to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A grinding wheel casting cooling and demoulding device based on air pressure lifting, comprising:

[0008] A lifting plate, and a fixing column fixedly mounted on the lifting plate, a fixed mold is fixed to the end of the fixing column, a groove is provided at the bottom of the fixed mold, and a pneumatic tube is fixed to the bottom of the fixed mold;

[0009] Also includes:

[0010] A piston cylinder is fixedly mounted on the lifting plate, a hollow tube penetrating the air pressure tube is rotatably mounted on the end of the piston cylinder, and an ejector plate is slidably mounted in the fixed mold;

[0011] A rotation limiting mechanism is arranged in the air pressure tube and connected to the ejection plate and the hollow tube. A temperature control and pressurization component is also arranged in the air pressure tube. The temperature control and pressurization component can be activated when the pressure of the air pressure tube changes, so as to drive the hollow tube to rotate through the rotation limiting mechanism.

[0012] A pump air cooling mechanism, which is arranged on the piston cylinder and connected to the hollow tube, and the pump air cooling mechanism can pump the gas in the piston cylinder into the fixed mold when the hollow tube rotates;

[0013] The conductive ejection mechanism is arranged in the hollow tube and connected to the ejection plate. When the air pressure in the air pressure tube changes, the conductive ejection mechanism can adjust the conductive state of the piston cylinder and drive the ejection plate to rotate and move in a direction away from the lifting plate.

[0014] As a further solution of the present invention: the rotation limiting mechanism includes a limit tooth fixedly mounted on the ejection plate, a follower tooth matched with the limit tooth is fixed at the end of the hollow tube, a first spiral groove is provided on the circumferential outer wall of the hollow tube, and a guide assembly connected to the first spiral groove is arranged in the air pressure tube.

[0015] As a further solution of the present invention: the guide assembly includes a second guide column fixedly installed in the pneumatic tube, a movable disk slidably installed on the second guide column and slidably connected to the hollow tube, a third limit block slidably engaged with the first spiral groove is fixed to the inner wall of the movable disk, and a third spring abutting against the movable disk is sleeved on the hollow tube.

[0016] As a further solution of the present invention: the temperature control and boost assembly includes a plurality of air storage pipes connected to the air pressure pipe and equidistantly distributed around the circumference, a second fixed ring and a support sleeve are fixed in the air storage pipe, a support rod is slidably installed in the support sleeve, a movable ring that abuts against the second fixed ring is fixed at the end of the support rod, and a second spring that abuts against the movable ring is sleeved on the support sleeve and the support rod.

[0017] As a further solution of the present invention: the pump air cooling mechanism includes a rotating plate fixedly mounted on the hollow tube, a sealing ring rotatably connected to the groove is fixed on the rotating plate, an air outlet groove cooperating with the sealing ring is opened on the fixed mold, a conduit fixedly connected to the sealing ring is connected to the piston cylinder, and an air supply assembly is arranged in the piston cylinder.

[0018] As a further solution of the present invention: the air supply assembly includes a rotating rod rotatably installed in the piston cylinder, the circumferential outer wall of the rotating rod is provided with an annular groove, a first guide column symmetrically arranged is fixed in the piston cylinder, a piston disk slidably connected to the rotating rod is slidably installed on the first guide column, and a first limit block slidably engaged with the annular groove is fixed to the inner wall of the piston disk.

[0019] As a further solution of the present invention: the conductive ejection mechanism includes a first fixed ring fixedly installed in the hollow tube, a rotating sleeve is fixed on the ejection plate, a first spring is sleeved on the rotating sleeve, two ends of the first spring are respectively abutted against the ejection plate and the first fixed ring, and a pushing assembly connected to the rotating sleeve is arranged in the hollow tube.

[0020] As a further solution of the present invention: the pushing assembly includes a first conducting hole opened at the top of the piston cylinder, a second conducting hole is opened at the bottom of the hollow tube and is conductively matched with the first conducting hole, a sealing ring is installed in the sliding seal in the hollow tube, a support column passing through the hollow tube and the piston cylinder is fixed on the sealing ring, and a driven structure connected to the sealing ring is arranged in the rotating sleeve.

[0021] As a further solution of the present invention: the driven structure includes a vertical groove and a second spiral groove opened on the inner wall of the rotating sleeve, a follower ring slidably connected to the rotating sleeve is fixed on the sealing ring, and a second limit block slidably engaged with the vertical groove and the second spiral groove is fixed on the outer wall of the follower ring.

[0022] A demoulding method of a grinding wheel casting cooling demoulding device based on air pressure lifting, comprising the following steps:

[0023] Step 1: Place the grinding wheel piece into the fixed mold and place it on the ejector plate for hot pressing;

[0024] Step 2: Under the action of the ejector plate, the rotation of the hollow tube is limited by the rotation limiting mechanism, and under the action of temperature, the pressure in the air pressure tube increases, thereby driving the temperature control and boosting component to move;

[0025] Step 3: After the hot pressing forming is completed, under the action of the conduction ejection mechanism, the rotation limiting mechanism is controlled by the ejection plate to no longer limit the rotation of the hollow tube. At this time, under the action of the temperature control and booster assembly, the hollow tube is driven to rotate through the rotation limiting mechanism;

[0026] Step 4: The hollow tube will drive the pump air cooling mechanism to move to gradually cool the grinding wheel. After the cooling is completed, the air pressure in the hollow tube returns to the initial state, so that the pump air cooling mechanism no longer pumps gas;

[0027] Step 5: When the air pressure in the piston cylinder rises, the ejector plate is controlled to rotate by the ejector mechanism and moves in a direction away from the lifting plate.

[0028] Compared with the prior art, the beneficial effect of the present invention is that the present invention can perform demolding after the grinding wheel casting is cooled after hot pressing forming. Specifically, during hot pressing forming, the ejector plate fits with the bottom of the fixed mold, so that the hollow tube is controlled to be in a fixed state through the rotation limiting mechanism. As the temperature of the fixed mold gradually increases, the air pressure in the air pressure tube gradually increases, thereby driving the temperature control and boosting component to move. After the hot pressing forming is completed, under the action of the conductive ejector mechanism, the ejector plate moves a certain distance in the direction away from the lifting plate, so that the rotation limiting mechanism no longer limits the rotation of the hollow tube. At the same time, under the action of the temperature control and boosting component, the rotation limiting mechanism is driven to move by air pressure to control the movement of the pump air cooling mechanism, thereby cooling the grinding wheel casting. After cooling is completed, the air pressure in the air pressure tube decreases. Under the action of the pump air cooling mechanism, the conductive ejector mechanism is controlled to move to eject the grinding wheel casting through the ejector plate, thereby achieving the effect of automatically ejecting the casting after cooling is completed.

[0029] Before the grinding wheel casting is ejected, the ejection plate is controlled to reciprocate by a certain angle under the action of the second spiral groove and the second limit block to prevent the grinding wheel casting from being adhered to the fixed mold during the cooling process, thereby preventing the grinding wheel casting from being damaged during the ejection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The present invention is a schematic structural diagram of an embodiment of a grinding wheel casting cooling and demoulding device based on air pressure lifting.

[0031] Figure 2 The present invention is a schematic cross-sectional structure diagram of a fixed mold, an air pressure tube, and a piston cylinder in one embodiment of a cooling and demoulding device for a grinding wheel casting based on air pressure lifting.

[0032] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at point A in the middle.

[0033] Figure 4 It is a schematic diagram of a partial half-section structure of an embodiment of a grinding wheel casting cooling and demoulding device based on air pressure lifting.

[0034] Figure 5 The present invention is a schematic diagram of a half-section structure of a partially conductive ejection mechanism and a hollow tube in an embodiment of a grinding wheel casting cooling and demoulding device based on air pressure lifting.

[0035] Figure 6 for Figure 5 A magnified schematic diagram of the structure at point B in the middle.

[0036] Figure 7 The present invention is a schematic diagram of the exploded structure of a partially conductive ejection mechanism and a partially rotation limiting mechanism in one embodiment of a grinding wheel casting cooling and demoulding device based on air pressure lifting.

[0037] Figure 8 The present invention is a schematic structural diagram of a piston cylinder and a first conducting hole in an embodiment of a grinding wheel casting cooling and demoulding device based on air pressure lifting.

[0038] Fig. 9 The present invention is a schematic diagram of the exploded structure of a part of the pump air cooling mechanism in one embodiment of a grinding wheel casting cooling and demoulding device based on air pressure lifting.

[0039] In the figure: 1, lifting plate; 2, fixing column; 3, fixed mold; 301, groove; 4, piston cylinder; 401, first conducting hole; 5, rotating rod; 501, annular groove; 6, piston plate; 7, first limit block; 8, first guide column; 9, hollow tube; 901, second conducting hole; 902, first fixing ring; 903, follower tooth; 904, first spiral groove; 10, sealing ring; 1001, supporting column; 11, follower ring; 12, second limit block; 13, rotating Movable sleeve; 1301, vertical groove; 1302, second spiral groove; 14, first spring; 15, ejector plate; 16, limit tooth; 17, air pressure tube; 18, movable disk; 19, third limit block; 20, second guide column; 21, rotating plate; 22, blocking ring; 23, conduit; 24, air outlet slot; 25, air storage pipe; 2501, second fixed ring; 26, support sleeve; 27, support rod; 28, second spring; 29, movable ring; 30, third spring. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0042] See also Figures 1 to 9In an embodiment of the present invention, a grinding wheel casting cooling and demoulding device based on air pressure lifting comprises:

[0043] A lifting plate 1, and a fixing column 2 fixedly mounted on the lifting plate 1, a fixed mold 3 is fixed to the end of the fixing column 2, a groove 301 is opened at the bottom of the fixed mold 3, and a pneumatic tube 17 is fixed to the bottom of the fixed mold 3;

[0044] Also includes:

[0045] The piston cylinder 4 is fixedly mounted on the lifting plate 1, and a hollow tube 9 penetrating the air pressure tube 17 is rotatably mounted on the end of the piston cylinder 4, and an ejector plate 15 is slidably mounted in the fixed mold 3;

[0046] See also Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 7 , a rotation limiting mechanism is arranged in the air pressure tube 17 and is connected to the ejection plate 15 and the hollow tube 9, the rotation limiting mechanism includes a limiting tooth 16 fixedly mounted on the ejection plate 15, a follower tooth 903 cooperating with the limiting tooth 16 is fixed at the end of the hollow tube 9, a first spiral groove 904 is opened on the circumferential outer wall of the hollow tube 9, a guide assembly connected to the first spiral groove 904 is arranged in the air pressure tube 17, wherein the guide assembly includes a second guide column 20 fixedly mounted in the air pressure tube 17, a movable disk 18 slidably connected to the hollow tube 9 is slidably mounted on the second guide column 20, a third limiting block 19 slidably engaged with the first spiral groove 904 is fixed on the inner wall of the movable disk 18, and a third spring 30 abutting against the movable disk 18 is sleeved on the hollow tube 9.

[0047] In detail, the movable disk 18 divides the air pressure tube 17 into two spaces, and the space located in the direction of the ejector plate 15 is filled with expansion gas. In the initial state, the temperature in the air pressure tube 17 is at room temperature, so that the expansion gas is in a contracted state, and the third spring 30 is in a compressed state, so that the movable disk 18 is located at the end of the stroke in the direction of the ejector plate 15, and the third limit block 19 is located at the end of the stroke on one side of the first spiral groove 904. The ejector plate 15 is slidably sealed and connected to the fixed mold 3. When the grinding wheel casting is processed, the raw material can be added into the fixed mold 3 and fall on the ejector plate 1 5, at this time, the fixed mold 3 can be entered through the movable mold to perform hot pressing molding on the raw materials. Under the action of the downward pressure, the ejector plate 15 will move toward the bottom of the fixed mold 3, thereby driving the limit clamping teeth 16 to move. When the ejector plate 15 moves to the position of fitting with the bottom of the fixed mold 3, the ejector plate 15 will no longer move, and the limit clamping teeth 16 will be engaged with the follower clamping teeth 903, thereby limiting the rotation of the hollow tube 9. Since the grinding wheel casting is hot-pressed, the temperature in the fixed mold 3 will increase, and the heat will be conducted to the air pressure tube 17, so that the temperature in the air pressure tube 17 increases. At this time, the expanding gas Expansion will occur, and under the action of the limit latch 16 and the follower latch 903, the hollow tube 9 cannot rotate, so that the position of the movable disk 18 is controlled to remain unchanged by the third limit block 19 and the first spiral groove 904. Therefore, under the action of air pressure, the temperature control and booster assembly will move to convert and store the thrust generated by the gas expansion. When the grinding wheel casting is pressed and formed, the movable mold will be separated from the fixed mold 3. Under the action of the conduction ejection mechanism, the ejection plate 15 moves a certain distance in the direction away from the air pressure tube 17 to drive the limit latch 16 and the follower latch 903. Separated, the hollow tube 9 can rotate freely. At this time, under the action of the temperature control and boosting component, the air pressure in the air pressure tube 17 is controlled to increase again, thereby pushing the movable disk 18 to move along the length direction of the second guide column 20 and compressing the third spring 30. The second guide column 20 has a guiding function to ensure that the movable disk 18 does not rotate during movement. The movable disk 18 will also drive the third limit block 19 to move, so as to control the hollow tube 9 to rotate a certain angle through the first spiral groove 904, thereby driving the pump air cooling mechanism to move, so as to cool the grinding wheel casting on the ejection plate 15.

[0048] Preferably, since the grinding wheel casting is hot-pressed, and during the pressing process, the ejector plate 15 is subjected to downward pressure, which drives the limit latch 16 to move to the engaging position with the follower latch 903 to ensure that the hollow tube 9 does not rotate during the pressing process, thereby avoiding the problem that the pump air cooling mechanism supplies air to the fixed mold 3 during pressing, causing the temperature to drop, and resulting in poor hot pressing effect. The working state of the pump air cooling mechanism can be automatically controlled by the temperature change in the air pressure tube 17.

[0049] See also Figure 2 , Figure 3 A temperature control and boosting assembly is also provided in the air pressure tube 17. The temperature control and boosting assembly can be activated when the pressure in the air pressure tube 17 changes, so as to drive the hollow tube 9 to rotate through the rotation limiting mechanism. The temperature control and boosting assembly includes a plurality of air storage tubes 25 connected to the air pressure tube 17 and distributed equidistantly around the circumference. A second fixing ring 2501 and a supporting sleeve 26 are fixed in the air storage tube 25. A supporting rod 27 is slidably installed in the supporting sleeve 26. A movable ring 29 that abuts against the second fixing ring 2501 is fixed at the end of the supporting rod 27. A second spring 28 that abuts against the movable ring 29 is sleeved on the supporting sleeve 26 and the supporting rod 27.

[0050] It should be noted that, in the initial state, the second spring 28 is in a compressed state, so that the movable ring 29 and the second fixed ring 2501 are in abutment state, and the support rod 27 is located at the end of the stroke away from the support sleeve 26. At this time, the connection size between the air storage pipe 25 and the air pressure pipe 17 is the smallest. When the grinding wheel casting is processed, the limit clamping tooth 16 and the follower clamping tooth 903 will be in a clamping state. At this time, the hollow tube 9 will not rotate. As the temperature increases, the air pressure in the air pressure pipe 17 increases. Since the movable disk 18 does not move, the air pressure will push the movable ring 29 to move toward the support sleeve 26, thereby driving the support rod 27 to move toward the support sleeve 26. The movable ring 29 is pushed toward the initial position to increase the air pressure in the air pressure tube 17. Under the action of the air pressure, the movable disk 18 is pushed toward the direction away from the ejection plate 15 to control the rotation of the hollow tube 9 through the third limit block 19 and the first spiral groove 904, thereby driving the pump air cooling mechanism to move. Under the action of the pump air cooling mechanism, the grinding wheel casting is cooled by air supply.

[0051] Preferably, when the expansion gas expands, the air pressure first acts on the second spring 28, so that the second spring 28 plays the role of energy storage, and after the pressing of the grinding wheel casting is completed, the second spring 28 is elastically released, thereby achieving the effect of force conversion, which can prevent the pressure in the air pressure tube 17 from being excessively high and causing damage, and can also achieve the effect of quickly controlling the pump air cooling mechanism to cool and demold the grinding wheel casting after the pressing of the grinding wheel casting is completed.

[0052] See also Figure 1 , Figure 2 , Figure 4 , Figure 8 , Fig. 9, a pumping air cooling mechanism is arranged on the piston cylinder 4 and connected to the hollow tube 9. The pumping air cooling mechanism can pump the gas in the piston cylinder 4 into the fixed mold 3 when the hollow tube 9 rotates. The pumping air cooling mechanism includes a rotating plate 21 fixedly mounted on the hollow tube 9, a blocking ring 22 rotatably connected to the groove 301 is fixed on the rotating plate 21, an air outlet groove 24 cooperating with the blocking ring 22 is opened on the fixed mold 3, a conduit 23 fixedly connected to the blocking ring 22 is connected to the piston cylinder 4, and an air supply component is arranged in the piston cylinder 4, wherein the air supply component includes a rotating rod 5 rotatably mounted in the piston cylinder 4, an annular groove 501 is opened on the circumferential outer wall of the rotating rod 5, and a first guide column 8 symmetrically arranged is fixed in the piston cylinder 4, a piston disc 6 slidably connected to the rotating rod 5 is slidably mounted on the first guide column 8, and a first limit block 7 slidably engaged with the annular groove 501 is fixed on the inner wall of the piston disc 6.

[0053] Further, four one-way valves are installed on the piston cylinder 4, two of which are connected to the conduit 23, the third one-way valve is connected to the outside air, and the last one-way valve is connected to the conductive ejection mechanism. Under the action of the one-way valves, air can only enter the piston cylinder 4 through the outside and be discharged through the conduit 23. The annular groove 501 is composed of two symmetrically arranged spiral grooves, and the ends of the spiral grooves are connected to each other. The number of spiral turns is half a turn. In the initial state, the conduit 23 and the air outlet groove 24 are in a separated state. Therefore, the conduit 23 is in a blocked state. The first limit block 7 is located at the end of the stroke on one side of the annular groove 501, so that the piston disc 6 is located at the end of the stroke facing the side of the lifting plate 1. When the grinding wheel casting is pressed, under the action of the conductive ejection mechanism, the ejection plate 15 drives the limit clamping tooth 16 to separate from the follower clamping tooth 903. Under the action of air pressure, the hollow tube 9 is controlled to rotate. Thereby, the rotating plate 21 is driven to move, and the rotating plate 21 also drives the sealing ring 22 to move, so that the conduit 23 moves to the position connected with the air outlet slot 24. At this time, the rotating rod 5 rotates, and under the action of the annular groove 501 and the first limit block 7, the piston disc 6 is controlled to move in the direction away from the lifting plate 1, so that the gas in the piston cylinder 4 is blown to the surface of the grinding wheel casting with a higher temperature through the conduit 23 and the air outlet slot 24, thereby increasing the air circulation on the casting surface to cool the grinding wheel casting. When the first limit block 7 moves to the end of the stroke on the other side of the annular groove 501, the piston disc 6 moves to the end of the stroke away from the lifting plate 1, and the gas pumping in the piston cylinder 4 is completed. At this time, under the action of the rotating rod 5, the piston disc 6 moves toward the initial position to absorb air into the piston cylinder 4 again, and the above steps are repeated to continuously perform air supply cooling treatment on the grinding wheel casting.

[0054] Preferably, the rotation of the rotating rod 5 can be controlled by an external motor. This is an application of the prior art and will not be elaborated in this application. If the grinding wheel casting is demolded before being cooled, the grinding wheel surface may be damaged or of poor quality. Therefore, under the action of air supply cooling by the duct 23 and the air outlet slot 24, the grinding wheel casting can be cooled. When the cooling is completed, the expanded gas in the air pressure tube 17 gradually contracts. Under the action of the third spring 30, the movable disk 18 is controlled to move toward the initial position to control the hollow tube 9 to rotate toward the initial angle. At the same time, the hollow tube 9 will also drive the rotating plate 21 and the sealing ring 22 to move, so that after cooling is completed, the control duct 23 and the air outlet slot 24 are separated again. At this time, the piston disk 6 continues to move, so that the air pressure in the piston cylinder 4 rises, thereby driving the conduction ejection mechanism to move, so that it will be gradually ejected through the ejection plate 15.

[0055] See also Figure 2 , Figure 4-Figure 7 , a conduction ejection mechanism is arranged in the hollow tube 9 and connected to the ejection plate 15. The conduction ejection mechanism can adjust the conduction state of the piston cylinder 4 when the air pressure in the air pressure tube 17 changes, and drive the ejection plate 15 to rotate while moving in a direction away from the lifting plate 1. The conduction ejection mechanism includes a first fixed ring 902 fixedly installed in the hollow tube 9, a rotating sleeve 13 is fixed on the ejection plate 15, and a first spring 14 is sleeved on the rotating sleeve 13. The two ends of the first spring 14 are respectively in contact with the ejection plate 15 and the first fixed ring 902. A pushing component connected to the rotating sleeve 13 is arranged in the hollow tube 9, wherein the pushing component includes a first fixed ring 902 opened at the top of the piston cylinder 4 A first conducting hole 401 is provided at the bottom of the hollow tube 9, and a second conducting hole 901 is provided to conduct with and cooperate with the first conducting hole 401. A sealing ring 10 is installed in the hollow tube 9 for sliding sealing. A supporting column 1001 that passes through the hollow tube 9 and the piston cylinder 4 is fixed on the sealing ring 10. A driven structure connected with the sealing ring 10 is provided in the rotating sleeve 13. The driven structure mentioned above includes a vertical groove 1301 and a second spiral groove 1302 provided on the inner wall of the rotating sleeve 13. A follower ring 11 that is slidably connected with the rotating sleeve 13 is fixed on the sealing ring 10, and a second limit block 12 that is slidably engaged with the vertical groove 1301 and the second spiral groove 1302 is fixed on the outer wall of the follower ring 11.

[0056] Furthermore, the fourth one-way valve cooperates with the first conducting hole 401, and the second spiral groove 1302 is composed of a plurality of symmetrically arranged spiral grooves, and is arranged in a wave shape. During the hot pressing process of the grinding wheel casting, the hollow tube 9 remains in a fixed state. At this time, the first conducting hole 401 and the second conducting hole 901 are in a conducting state. Since no cooling treatment is required at this time, the rotating rod 5 is in a stationary state. The sealing ring 10 and the support column 1001 are heavy. Under the action of gravity, the sealing ring 10 and the second conducting hole 901 are tightly fitted, so that the second limit block 12 is controlled by the follower ring 11 to be located in the vertical groove 1301 away from the second spiral groove 1302. At the end of the stroke on the side, during hot pressing, the ejector plate 15 fits with the bottom of the fixed mold 3, thereby compressing the first spring 14. When the hot pressing is completed, the first spring 14 is elastically released, so that the ejector plate 15 moves a certain distance away from the lifting plate 1, so that the limit latch 16 is separated from the follower latch 903. At the same time, under the action of air pressure, the hollow tube 9 is controlled to rotate, thereby driving the second conducting hole 901 to move to a position separated from the first conducting hole 401. At this time, the conduit 23 and the air outlet slot 24 are in a conducting state to cool the grinding wheel casting. As the temperature of the grinding wheel casting gradually decreases, the air pressure in the air pressure tube 17 gradually decreases, so that The hollow tube 9 is rotated toward the initial angle. When the temperature drops to the required value, the conduit 23 and the air outlet slot 24 will be separated, thereby blocking the conduit 23. At the same time, the hollow tube 9 will drive the second conducting hole 901 to move to a position matching with the first conducting hole 401. When the piston disc 6 moves in a direction away from the lifting plate 1, the gas in the piston cylinder 4 can be transported to the hollow tube 9 through the first conducting hole 401 and the second conducting hole 901 to promote the movement of the sealing ring 10 and the support column 1001. The sealing ring 10 will also drive the follower ring 11 to move, thereby driving the second limit block 12 to move. The second limit block 12 will slide along the vertical slot 1301. When the second limit block 12 leaves the vertical groove 1301 and enters the second spiral groove 1302, under the action of the second limit block 12 and the second spiral groove 1302, the rotating sleeve 13 is controlled to reciprocate by a certain angle, thereby driving the ejection plate 15 to rotate. When the second limit block 12 moves to the end of the stroke of the second spiral groove 1302, the ejection plate 15 is driven by the rotating sleeve 13 to move in a direction away from the fixed mold 3, thereby ejecting the grinding wheel casting. A pressure relief valve is also provided on the hollow tube 9. After the grinding wheel is ejected, the pressure relief valve can be opened to return the pressure in the hollow tube 9 to a normal value. Under the action of gravity, the sealing ring 10 is reset to facilitate the subsequent production of grinding wheels.

[0057] Preferably, by switching the conduction position of the piston cylinder 4, the movement of the sealing ring 10 can be automatically controlled to eject the grinding wheel casting after the cooling of the grinding wheel casting is completed. In order to ensure that the grinding wheel casting can be ejected smoothly, before the grinding wheel casting is ejected, the ejection plate 15 is controlled to reciprocate by a certain angle under the action of the second spiral groove 1302 and the second limit block 12 to prevent the grinding wheel casting from sticking to the fixed mold 3 during the cooling process, thereby causing damage to the grinding wheel casting during the ejection process.

[0058] A demoulding method of a grinding wheel casting cooling demoulding device based on air pressure lifting, comprising the following steps:

[0059] Step 1: Place the grinding wheel piece and raw material into the fixed mold 3, and drop it onto the ejector plate 15 for hot pressing;

[0060] Step 2: Under the action of the ejector plate 15, the rotation of the hollow tube 9 is limited by the rotation limiting mechanism, and under the action of temperature, the pressure in the air pressure tube 17 is increased, thereby driving the temperature control and boosting component to move;

[0061] Step 3: After the hot pressing is completed, under the action of the conduction ejection mechanism, the ejection plate 15 controls the rotation restriction mechanism to no longer restrict the rotation of the hollow tube 9. At this time, under the action of the temperature control and pressurization component, the rotation restriction mechanism drives the hollow tube 9 to rotate;

[0062] Step 4: The hollow tube 9 will drive the pump air cooling mechanism to move, so as to gradually cool the grinding wheel. After the cooling is completed, the air pressure in the hollow tube 9 returns to the initial state, so that the pump air cooling mechanism no longer pumps gas;

[0063] Step 5: When the air pressure in the piston cylinder 4 rises, the ejection plate 15 is controlled to rotate by the conduction ejection mechanism and move in a direction away from the lifting plate 1 .

[0064] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0065] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A grinding wheel casting cooling and demoulding device based on air pressure lifting, comprising: A lifting plate (1), and a fixing column (2) fixedly mounted on the lifting plate (1), a fixed mold (3) being fixed at the end of the fixing column (2), a groove (301) being provided at the bottom of the fixed mold (3), and a pneumatic tube (17) being fixed at the bottom of the fixed mold (3); It is characterized by further comprising: A piston cylinder (4) is fixedly mounted on the lifting plate (1), a hollow tube (9) penetrating the air pressure tube (17) is rotatably mounted on the end of the piston cylinder (4), and an ejection plate (15) is slidably mounted in the fixed mold (3); A rotation limiting mechanism is arranged in the air pressure tube (17) and is connected to the ejection plate (15) and the hollow tube (9). A temperature control and pressurizing component is also arranged in the air pressure tube (17). The temperature control and pressurizing component can be activated when the pressure of the air pressure tube (17) changes, so as to drive the hollow tube (9) to rotate through the rotation limiting mechanism. a pump air cooling mechanism, which is arranged on the piston cylinder (4) and connected to the hollow tube (9), and is capable of pumping the gas in the piston cylinder (4) into the fixed mold (3) when the hollow tube (9) rotates; A conductive ejection mechanism is arranged in the hollow tube (9) and connected to the ejection plate (15). When the air pressure in the air pressure tube (17) changes, the conductive ejection mechanism can adjust the conductive state of the piston cylinder (4) and drive the ejection plate (15) to rotate and move in a direction away from the lifting plate (1).

2. The device for cooling and demoulding a grinding wheel casting based on air pressure lifting according to claim 1, characterized in that: The rotation limiting mechanism comprises a limit latch (16) fixedly mounted on the ejection plate (15); a follower latch (903) cooperating with the limit latch (16) is fixedly mounted on the end of the hollow tube (9); a first spiral groove (904) is provided on the circumferential outer wall of the hollow tube (9); and a guide assembly connected to the first spiral groove (904) is provided in the air pressure tube (17).

3. The device for cooling and demoulding a grinding wheel casting based on air pressure lifting according to claim 2, characterized in that: The guide assembly includes a second guide column (20) fixedly installed in the air pressure tube (17), a movable disk (18) slidably installed on the second guide column (20) and slidably connected to the hollow tube (9), a third limit block (19) slidably engaged with the first spiral groove (904) is fixed to the inner wall of the movable disk (18), and a third spring (30) abutting against the movable disk (18) is sleeved on the hollow tube (9).

4. The device for cooling and demoulding a grinding wheel casting based on air pressure lifting according to claim 1, characterized in that: The temperature control and boost component comprises a plurality of air storage pipes (25) connected to the air pressure pipe (17) and equidistantly distributed around the circumference, wherein a second fixing ring (2501) and a supporting sleeve (26) are fixed inside the air storage pipe (25), a supporting rod (27) is slidably installed inside the supporting sleeve (26), a movable ring (29) abutting against the second fixing ring (2501) is fixed at the end of the supporting rod (27), and a second spring (28) abutting against the movable ring (29) is sleeved on the supporting sleeve (26) and the supporting rod (27).

5. The device for cooling and demoulding a grinding wheel casting based on air pressure lifting according to claim 1, characterized in that: The pump air cooling mechanism comprises a rotating plate (21) fixedly mounted on the hollow tube (9), a sealing ring (22) rotatably connected to the groove (301) being fixed on the rotating plate (21), an air outlet groove (24) cooperating with the sealing ring (22) being provided on the fixed mold (3), a conduit (23) fixedly connected to the sealing ring (22) being connected to the piston cylinder (4), and an air supply component being arranged inside the piston cylinder (4).

6. The device for cooling and demoulding a grinding wheel casting based on air pressure lifting according to claim 5, characterized in that: The air supply assembly comprises a rotating rod (5) rotatably mounted in the piston cylinder (4), an annular groove (501) being provided on the circumferential outer wall of the rotating rod (5), a symmetrically arranged first guide column (8) being fixed in the piston cylinder (4), a piston disc (6) slidably connected to the rotating rod (5) being slidably mounted on the first guide column (8), and a first limit block (7) slidably engaged with the annular groove (501) being fixed on the inner wall of the piston disc (6).

7. The device for cooling and demoulding a grinding wheel casting based on air pressure lifting according to claim 1, characterized in that: The conductive ejection mechanism comprises a first fixed ring (902) fixedly mounted in the hollow tube (9); a rotating sleeve (13) is fixed on the ejection plate (15); a first spring (14) is sleeved on the rotating sleeve (13); two ends of the first spring (14) are respectively in contact with the ejection plate (15) and the first fixed ring (902); and a pushing assembly connected to the rotating sleeve (13) is arranged in the hollow tube (9).

8. The device for cooling and demoulding a grinding wheel casting based on air pressure lifting according to claim 7, characterized in that: The pushing assembly comprises a first conducting hole (401) provided at the top of the piston cylinder (4); a second conducting hole (901) which is in conduction with and matches the first conducting hole (401) is provided at the bottom of the hollow tube (9); a sealing ring (10) is installed as a sliding seal in the hollow tube (9); a supporting column (1001) which passes through the hollow tube (9) and the piston cylinder (4) is fixed on the sealing ring (10); and a driven structure connected to the sealing ring (10) is provided in the rotating sleeve (13).

9. The device for cooling and demoulding a grinding wheel casting based on air pressure lifting according to claim 8, characterized in that: The driven structure comprises a vertical groove (1301) and a second spiral groove (1302) provided on the inner wall of the rotating sleeve (13); a follower ring (11) slidably connected to the rotating sleeve (13) is fixed on the sealing ring (10); and a second limit block (12) slidably engaged with the vertical groove (1301) and the second spiral groove (1302) is fixed on the outer wall of the follower ring (11).

10. A demoulding method of a grinding wheel casting cooling demoulding device based on air pressure lifting, using the grinding wheel casting cooling demoulding device based on air pressure lifting as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Place the grinding wheel piece and raw material into the fixed mold (3), and drop it onto the top of the ejection plate (15) for hot pressing; Step 2: Under the action of the ejection plate (15), the rotation of the hollow tube (9) is limited by the rotation limiting mechanism, and under the action of temperature, the pressure in the air pressure tube (17) is increased, thereby driving the temperature control and boosting component to move; Step 3: After the hot pressing molding is completed, under the action of the conduction ejection mechanism, the ejection plate (15) controls the rotation restriction mechanism to no longer restrict the rotation of the hollow tube (9). At this time, under the action of the temperature control and boosting component, the rotation restriction mechanism drives the hollow tube (9) to rotate; Step 4: The hollow tube (9) will drive the pump air cooling mechanism to move, so as to gradually cool the grinding wheel. After the cooling is completed, the air pressure in the hollow tube (9) returns to the initial state, so that the pump air cooling mechanism no longer pumps gas; Step 5: When the air pressure in the piston cylinder (4) rises, the ejection plate (15) is controlled to rotate by the ejection mechanism and move in a direction away from the lifting plate (1).

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