A casting device for ball valve castings

Abstract

The present invention relates to the field of casting equipment, and particularly to a casting equipment for ball valve castings. The technical problem is that the existing sand casting method has a low die matching efficiency, and it is difficult for the upper die to be fully aligned with the lower die during the die matching process, which affects the die clamping quality. A casting equipment for ball valve castings includes a housing, a discharge table is connected to the housing, a slide plate is slidably connected to the discharge table, a box door is rotatably connected to the housing, two conveyor belts are provided on one side of the housing, and two guiding frames are connected to the housing. The upper die and the lower die will slide along the guiding frames to the first support plate and the second support plate respectively. The movement of the second support plate drives the lower die to move together, so that the lower die falls on the housing. The first support plate drives the upper die to move together. Subsequently, the upper die will contact the lower die. After the first support plate is separated from the upper die, the upper die and the lower die will be clamped. In this way, the continuous clamping work of the upper die and the lower die can be realized, and the work efficiency can be improved.

Description

Technical Field

[0001] The present invention relates to the field of casting equipment, and particularly to a casting equipment for ball valve castings. Background Art

[0002] The ball valve is a commonly used key component in the fluid control system, and the ball valve casting is one of the important components of the ball valve. The ball valve casting is made of high-strength and corrosion-resistant materials such as stainless steel, carbon steel or alloy steel. Common methods include investment casting, lost foam casting and sand casting. In sand casting, a special molding sand is used to form the cavity and core of the casting in the mold, then the prepared molds are assembled, and the molten metal liquid is poured into the mold to form the casting. In the existing sand casting method during the mold assembly process, usually a crane is used to lift the upper mold and move it above the lower mold to engage the upper and lower molds, resulting in low mold assembly efficiency. Moreover, during the mold assembly process, it is difficult for the upper mold to be fully aligned with the lower mold, affecting the quality of mold engagement. Summary of the Invention

[0003] Aiming at the defects in the prior art, the purpose of the present invention is to provide a casting equipment for ball valve castings that can realize the continuous engagement of the upper mold and the lower mold, improve work efficiency, and can correct the positions of the upper mold and the lower mold during the engagement process of the upper mold and the lower mold, thereby improving the engagement quality of the upper mold and the lower mold.

[0004] The technical solution is as follows: A casting equipment for ball valve castings includes a housing, a discharge table is connected to the housing, a sliding plate is slidably connected to the discharge table, a box door is rotatably connected to the housing, two conveyor belts are provided on one side of the housing, two guiding frames are connected to the housing, the two guiding frames are respectively connected to two conveying platforms, and a lifting mechanism, a guiding mechanism and a locking mechanism are provided on the housing.

[0005] As a further preferred solution, the lifting mechanism includes a sliding frame. Two groups of sliding frames are slidably connected inside the housing. Two supporting plates one are connected between one group of sliding frames, and two supporting plates two are connected between the other group of sliding frames. Four electric hydraulic cylinders one and four electric hydraulic cylinders two are connected inside the housing. The two supporting plates one are respectively connected to the four electric hydraulic cylinders two, and the two supporting plates two are respectively connected to the four electric hydraulic cylinders one. Four limiting frames are connected inside the housing. The two supporting plates one are respectively slidably connected to the four limiting frames, and the two supporting plates two are respectively slidably connected to the four limiting frames. The upper mold is placed on the two supporting plates one, and the lower mold is placed on the two supporting plates two.

[0006] As a further preferred solution, the guiding mechanism includes a positioning frame. The positioning frame is slidably connected to the housing. Three compression springs are connected between the positioning frame and the housing. Limiting strips are connected to both the two supporting plates one and the two supporting plates two. A buffer plate is slidably connected to each limiting strip, and a first return spring is connected between the buffer plate and the limiting strip.

[0007] As a further preferred solution, four lock holes are provided on the positioning frame.

[0008] As a further preferred solution, the locking mechanism includes guide rods. Two guide rods are slidably connected to the outer shell. Two lock rods are connected to each of the two guide rods. The four lock rods are slidably connected to the outer shell. Two positioning columns are connected to each of the two supporting plates II.

[0009] As a further preferred solution, a correction mechanism is further included. The correction mechanism includes a top block. Two top blocks are connected inside the outer shell. Mounting blocks are connected to each of the two supporting plates I. Correction rods are slidably connected to each of the two mounting blocks. Positioning rods are connected to each of the two correction rods. A second return spring is connected between the correction rod and the mounting block.

[0010] As a further preferred solution, the plate surfaces of the correction rod and the positioning rod on the same supporting plate I are kept on the same horizontal plane.

[0011] As a further preferred solution, a column gear is further included. A column gear is connected to the box door, and a rack is connected to the sliding plate.

[0012] The present invention has the following advantages: 1. The upper die and the lower die will slide along the guide frame to the supporting plate I and the supporting plate II respectively. The movement of the supporting plate II drives the lower die to move together. After the lower die contacts the outer shell, the two supporting plates II are separated from the lower die, so that the lower die falls on the outer shell. The supporting plate I drives the upper die to move together. Subsequently, the upper die will contact the lower die. After the supporting plate I is separated from the upper die, the first return spring resets to drive the buffer plate on the supporting plate I to reset. The upper die and the lower die will be clamped together. In this way, the continuous clamping work of the upper die and the lower die can be realized, and the work efficiency can be improved.

[0013] 2. During the movement of the supporting plate II, it will move along the sliding groove on the limiting frame. During the movement of the lower die, it will move to the middle of the positioning frame. The positioning frame will gradually contact the lower die, so that the position of the lower die will be corrected. The limiting frame will gradually squeeze the supporting plate I, so that the two supporting plates I will move in the direction away from each other. The upper die moves to between the positioning frames. Under the action of the positioning frame, the upper die will be aligned with the lower die. In this way, the positions of the upper die and the lower die can be corrected during the clamping process of the upper die and the lower die, and the clamping quality of the upper die and the lower die can be improved.

[0014] 3. During the process of the supporting plate I driving the upper die to move towards the lower die, the correction rod on the supporting plate I will be squeezed by the top block, so that the two correction rods will move towards each other. The second return spring is compressed. The movement of the two correction rods will drive the positioning rod to move, so that the two correction rods will correct the position of the lower die, and the two positioning rods will correct the position of the upper die. In this way, the clamping quality of the upper die and the lower die can be further improved. Description of the Drawings

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention.

[0016] Figure 2 This is a three-dimensional structural schematic diagram of the housing, unloading platform and sliding plate of the present invention.

[0017] Figure 3 This is a three-dimensional structural schematic diagram of the housing and guiding frame of the present invention.

[0018] Figure 4 This is a three-dimensional structural schematic diagram of the first electric hydraulic cylinder, the second electric hydraulic cylinder and the sliding frame of the present invention.

[0019] Figure 5 This is a three-dimensional structural schematic diagram of the limiting frame, guiding rod and positioning frame of the present invention.

[0020] Figure 6 This is a three-dimensional structural schematic diagram of the positioning frame, pressure spring, mounting block and correction rod of the present invention.

[0021] Figure 7 This is an exploded three-dimensional structural schematic diagram of the lifting mechanism of the present invention.

[0022] Figure 8 This is a three-dimensional structural schematic diagram of the second support plate, positioning column, locking rod and guiding rod of the present invention.

[0023] Figure 9 This is a three-dimensional structural schematic diagram of the top block, positioning frame and pressure spring of the present invention.

[0024] Figure 10 This is a three-dimensional structural schematic diagram of the limiting strip, buffer plate and first return spring of the present invention.

[0025] Figure 11 This is an exploded three-dimensional structural schematic diagram of the guiding mechanism of the present invention.

[0026] Figure 12 This is an exploded three-dimensional structural schematic diagram of the locking mechanism of the present invention.

[0027] Figure 13 This is an exploded three-dimensional structural schematic diagram of the correction mechanism of the present invention.

[0028] Figure 14 This is a three-dimensional structural schematic diagram of the sliding plate, rack, box door and column gear of the present invention.

[0029] Figure 15 For the present invention Figure 1 An enlarged three-dimensional structural schematic diagram at position A in

[0030] Wherein: 1 - outer shell, 2 - unloading platform, 3 - sliding plate, 4 - box door, 41 - conveyor belt, 5 - guiding frame, 61 - sliding frame, 62 - pallet 1, 63 - pallet 2, 64 - electric hydraulic cylinder 1, 65 - electric hydraulic cylinder 2, 66 - limiting frame, 7 - upper die, 8 - lower die, 91 - positioning frame, 92 - pressure spring, 93 - limiting bar, 94 - buffer plate, 95 - reset spring 1, 101 - guiding rod, 102 - locking rod, 103 - positioning post, 111 - ejector block, 112 - mounting block, 113 - correcting rod, 114 - positioning rod, 115 - reset spring 2, 12 - cylindrical gear, 13 - rack. Detailed implementation mode

[0031] The following will further illustrate the present invention in conjunction with specific embodiments. It should also be noted that unless otherwise clearly defined and limited, terms such as: setting, installation, connection, and coupling should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0032] Embodiment 1: A casting device for ball valve castings, as Figures 1 - 12 shown, includes an outer shell 1, an unloading platform 2 is connected to the outer shell 1, a sliding plate 3 is slidably connected to the unloading platform 2, a box door 4 is rotatably connected to the outer shell 1, two conveyor belts 41 are provided on one side of the outer shell 1, two guiding frames 5 are connected to the outer shell 1, the two guiding frames 5 are respectively connected to the two conveying platforms, and a lifting mechanism, a guiding mechanism and a locking mechanism are provided on the outer shell 1. The lifting mechanism is used to drive the casting mold to move, the guiding mechanism is used to assist the alignment of the casting mold, and the locking mechanism is used to fix the lifting mechanism.

[0033] The lifting mechanism includes a sliding frame 61. Two groups of sliding frames 61 are slidably connected inside the housing 1. Each group has two sliding frames 61, so there are a total of four sliding frames 61. Between one group of sliding frames 61, two first supporting plates 62 are connected. The two first supporting plates 62 are symmetrically arranged. Between the other group of sliding frames 61, two second supporting plates 63 are connected. The two second supporting plates 63 are symmetrically arranged. Four first electric hydraulic cylinders 64 and four second electric hydraulic cylinders 65 are connected inside the housing 1. The two first supporting plates 62 are respectively bolted to the four second electric hydraulic cylinders 65. The two second supporting plates 63 are respectively bolted to the four first electric hydraulic cylinders 64. Four limiting frames 66 are bolted inside the housing 1. Two chutes are provided on each limiting frame 66. The two first supporting plates 62 are respectively slidably connected to the upper chutes of the four limiting frames 66. The two second supporting plates 63 are respectively slidably connected to the lower chutes of the four limiting frames 66. An upper die 7 is placed on the two first supporting plates 62, and a lower die 8 is placed on the two second supporting plates 63.

[0034] The guiding mechanism includes a positioning frame 91. The positioning frame 91 is slidably connected to the housing 1. The positioning frame 91 is used to correct the casting mold. Three compression springs 92 are connected between the positioning frame 91 and the housing 1. Limiting bars 93 are respectively bolted to the two first supporting plates 62 and the two second supporting plates 63. A buffer plate 94 is slidably connected to each limiting bar 93. A first return spring 95 is connected between the buffer plate 94 and the limiting bar 93.

[0035] Four locking holes are provided on the positioning frame 91 for locking the positioning frame 91.

[0036] The locking mechanism includes guide rods 101. Two guide rods 101 are slidably connected to the housing 1. Two locking rods 102 are connected to each of the two guide rods 101. The locking rods 102 are used to lock the positioning frame 91. The four locking rods 102 are slidably connected to the housing 1. Two positioning columns 103 are fixedly connected to each of the two second supporting plates 63.

[0037] At first, the locking rod 102 is inserted into the locking hole of the positioning frame 91, and the positioning frame 91 is restricted. The user moves the upper mold 7 formed by sand casting onto the upper conveyor belt 41 and the lower mold 8 formed by sand casting onto the lower conveyor belt 41. Under the action of the conveyor belt 41, the upper mold 7 and the lower mold 8 move towards the direction close to the guiding frame 5 respectively. After the upper mold 7 and the lower mold 8 contact the two guiding frames 5 respectively, the guiding frame 5 will conduct preliminary position guiding on the upper mold 7 and the lower mold 8. Subsequently, the upper mold 7 and the lower mold 8 will slide onto the first support plate 62 and the second support plate 63 respectively along the guiding frame 5. The upper mold 7 and the lower mold 8 sliding onto the first support plate 62 and the second support plate 63 will squeeze the buffer plate 94. When the buffer plate 94 is squeezed, it will extend into the limiting strip 93, and the first reset spring 95 is compressed, thereby buffering the upper mold 7 and the lower mold 8. After the upper mold 7 and the lower mold 8 stop on the first support plate 62 and the second support plate 63, the user first controls the retraction of the telescopic rod of the second electric hydraulic cylinder 65. The retraction of the telescopic rod of the second electric hydraulic cylinder 65 drives two of the sliding frames 61 to move towards the direction close to the second electric hydraulic cylinder 65. The movement of the sliding frames 61 will drive the two second support plates 63 to move together. The movement of the second support plates 63 will drive the lower mold 8 to move. During the movement of the second support plates 63, they will move along the sliding grooves on the limiting frame 66. During the movement of the lower mold 8, it will move to the middle of the positioning frame 91, and the positioning frame 91 will gradually contact the lower mold 8, so that the position of the lower mold 8 will be corrected. The second support plates 63 continue to drive the lower mold 8 to move together. The two second support plates 63 will be gradually squeezed by the limiting frame 66, so that the two second support plates 63 will move away from each other, and the second support plates 63 will gradually separate from the lower mold 8. After the lower mold 8 contacts the housing 1, the two second support plates 63 and the lower mold 8 separate. The reset of the first reset spring 95 drives the buffer plate 94 on the second support plate 63 to reset, so that the lower mold 8 falls on the housing 1. The user shuts down the first electric hydraulic cylinder 64 and controls the retraction of the telescopic rod of the second electric hydraulic cylinder 65. The retraction of the telescopic rod of the second electric hydraulic cylinder 65 will drive the other two sliding frames 61 to move towards the direction close to the second electric hydraulic cylinder 65. The movement of the sliding frames 61 drives the first support plate 62 and the upper mold 7 to move together. The two first support plates 62 move along the sliding grooves of the limiting frame 66. During the movement of the upper mold 7 towards the direction close to the lower mold 8, the limiting frame 66 will gradually squeeze the first support plate 62, so that the two first support plates 62 will move away from each other. The upper mold 7 moves between the positioning frames 91. Under the action of the positioning frame 91, the upper mold 7 will be aligned with the lower mold 8. Subsequently, the upper mold 7 will contact the lower mold 8. After the first support plate 62 and the upper mold 7 separate, the reset of the first reset spring 95 drives the buffer plate 94 on the first support plate 62 to reset, and the upper mold 7 and the lower mold 8 will be clamped. Then the user controls the further retraction of the telescopic rod of the first electric hydraulic cylinder 64 and the second support plate 63 continues to move. The positioning post 103 on the second support plate 63 will be inserted into the guiding rod 101. The continuous movement of the positioning post 103 will squeeze the guiding rod 101, so that the two guiding rods 101 will move towards each other. The movement of the guiding rods 101 drives the locking rod 102 to move, so that the locking rod 102 will disengage from the locking hole of the positioning frame 91.When the second pallet 63 continues to move, it will contact the positioning frame 91. The positioning frame 91 will be squeezed by the second pallet 63 and extend into the housing 1. After the pressure spring 92 is compressed and the positioning frame 91 completely extends into the housing 1, the user controls the telescopic rods of the first electric hydraulic cylinder 64 and the second electric hydraulic cylinder 65 to stop retracting. Then, the user opens the box door 4, slides the slide plate 3 into the housing 1, so that the slide plate 3 connects the unloading platform 2 and the housing 1. The user can move the engaged upper die 7 and lower die 8 out of the housing 1 through the slide plate 3. Subsequently, after the user removes the engaged upper die 7 and lower die 8, the user resets the slide plate 3 and closes the box door 4. Then, the user controls the telescopic rods of the first electric hydraulic cylinder 64 and the second electric hydraulic cylinder 65 to reset. The reset of the telescopic rods of the first electric hydraulic cylinder 64 and the second electric hydraulic cylinder 65 drives the sliding frame 61, the first pallet 62 and the second pallet 63 to reset. The second pallet 63 gradually disengages from the positioning frame 91. The reset of the pressure spring 92 drives the positioning frame 91 to reset and extend out of the housing 1. The reset of the second pallet 63 drives the positioning column 103 to reset. The reset of the positioning column 103 drives the guide rod 101 and the locking rod 102 to reset, so that the locking rod 102 is reinserted into the locking hole of the positioning frame 91, restricting the positioning frame 91 again. After the first pallet 62 and the second pallet 63 are reset, the first electric hydraulic cylinder 64 and the second electric hydraulic cylinder 65 stop operating, completing one engagement operation of the upper die 7 and the lower die 8. In this way, the continuous engagement of the upper die 7 and the lower die 8 can be realized, improving the work efficiency, and the positions of the upper die 7 and the lower die 8 can be corrected during the engagement process of the upper die 7 and the lower die 8, improving the engagement quality of the upper die 7 and the lower die 8.,

[0038] Embodiment 2: On the basis of Embodiment 1, as Figures 6 - 15 shown, it further includes a correction mechanism. A correction mechanism is provided on the first pallet 62. The correction mechanism is used to further align the casting mold. The correction mechanism includes a top block 111. Two top blocks 111 are connected to the inside of the housing 1 by bolts. Installation blocks 112 are connected to both of the two first pallets 62 by bolts. Correction rods 113 are slidably connected to both of the two installation blocks 112. Positioning rods 114 are connected to both of the two correction rods 113 by bolts. A second return spring 115 is connected between the correction rod 113 and the installation block 112.

[0039] The plate surfaces of the correction rod 113 and the positioning rod 114 on the same first pallet 62 are kept on the same horizontal plane.

[0040] It further includes a column gear 12. The column gear 12 is connected to the box door 4. A rack 13 is connected to the slide plate 3 by bolts.

[0041] During the process of the first pallet 62 driving the upper die 7 to move towards the lower die 8, the correction rods 113 on the first pallet 62 will be squeezed by the top blocks 111, causing the two correction rods 113 to move towards each other, and the second reset spring 115 to be compressed. The movement of the two correction rods 113 will drive the positioning rods 114 to move, enabling the two correction rods 113 to correct the position of the lower die 8, and the two positioning rods 114 to correct the position of the upper die 7. Since the plate surfaces of the positioning rods 114 and the correction rods 113 are flush, the upper die 7 and the lower die 8 will be further aligned. After the correction rods 113 and the top blocks 111 are separated, the second reset spring 115 resets to drive the correction rods 113 to reset. In this way, the engagement quality of the upper die 7 and the lower die 8 can be further improved. During the unloading process, when the user opens the box door 4, the rotation of the box door 4 drives the column gear 12 to rotate. The rotation of the column gear 12 meshes with the rack 13, causing the slide plate 3 to be driven by the rack 13 to slide into the housing 1. When closing the box door 4, the reverse rotation of the column gear 12 drives the rack 13 and the slide plate 3 to reset. In this way, it can be avoided that the user forgets to slide the slide plate 3 to reset.

[0042] The above-described embodiments only represent the preferred embodiments of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the present invention.

[0043] It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications, improvements, and substitutions can be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A casting device for ball valve castings, characterized in that: The invention comprises a shell (1), a discharge platform (2) is connected to the shell (1), a slide plate (3) is slidably connected to the discharge platform (2), a box door (4) is rotatably connected to the shell (1), two conveyor belts (41) are provided on one side of the shell (1), two guide frames (5) are connected to the shell (1), the two guide frames (5) are respectively connected to the two conveyor platforms, and a lifting mechanism, a guiding mechanism, a locking mechanism and a correction mechanism are provided on the shell (1); The lifting mechanism comprises a sliding frame (61), wherein two groups of sliding frames (61) are slidably connected in the housing (1), wherein two first support plates (62) are connected between one group of sliding frames (61), and two second support plates (63) are connected between the other group of sliding frames (61), an upper mold (7) is placed on the two first support plates (62), and a lower mold (8) is placed on the two second support plates (63); The correction mechanism comprises a top block (111), two top blocks (111) are connected inside the housing (1), two support plates (62) are connected to mounting blocks (112), the two mounting blocks (112) are slidably connected to correction rods (113), the two correction rods (113) are connected to positioning rods (114), and a second return spring (115) is connected between the correction rods (113) and the mounting blocks (112); When the support plate 1 (62) drives the upper mold (7) to move toward the lower mold (8), the correction rod (113) on the support plate 1 (62) is squeezed by the top block (111), so that the two correction rods (113) move toward each other, and the return spring 2 (115) is compressed. The movement of the two correction rods (113) drives the positioning rod (114) to move, so that the two correction rods (113) correct the position of the lower mold (8), and the two positioning rods (114) correct the position of the upper mold (7).

2. A casting device for ball valve castings according to claim 1, characterized in that: The lifting mechanism also includes an electric hydraulic cylinder 1 (64), four electric hydraulic cylinders 1 (64) and four electric hydraulic cylinders 2 (65) are connected inside the outer shell (1), two support plates 1 (62) are connected to the four electric hydraulic cylinders 2 (65) respectively, two support plates 2 (63) are connected to the four electric hydraulic cylinders 1 (64) respectively, four limit frames (66) are connected inside the outer shell (1), two support plates 1 (62) are slidably connected to the four limit frames (66) respectively, and two support plates 2 (63) are slidably connected to the four limit frames (66) respectively.

3. A casting device for ball valve castings according to claim 2, characterized in that: The guide mechanism comprises a positioning frame (91), the positioning frame (91) is slidably connected to the housing (1), three pressure springs (92) are connected between the positioning frame (91) and the housing (1), two support plates 1 (62) and two support plates 2 (63) are connected to limit strips (93), each limit strip (93) is slidably connected to a buffer plate (94), and a return spring 1 (95) is connected between the buffer plate (94) and the limit strip (93).

4. A casting device for ball valve castings according to claim 3, characterized in that: The positioning frame (91) is provided with four locking holes.

5. A casting device for ball valve castings according to claim 3, characterized in that: The locking mechanism comprises a guide rod (101), two guide rods (101) are slidably connected to the housing (1), two locking rods (102) are connected to the two guide rods (101), the four locking rods (102) are slidably connected to the housing (1), and two positioning columns (103) are connected to the two support plates (63).

6. A casting device for ball valve castings according to claim 5, characterized in that: The plate surfaces of the correction rod (113) and the positioning rod (114) located on the same support plate (62) are maintained at the same horizontal plane.

7. A casting device for ball valve castings according to claim 6, characterized in that: It also includes a column gear (12), the box door (4) is connected to the column gear (12), and the slide plate (3) is connected to a rack (13).

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