Jig for changing the diameter of a green

Abstract

The present application relates to a kind of clamp for changing the diameter of clay blank, including bottom plate, front pressing plate, rear pressing plate, left pressing plate, right pressing plate, first driving device and second driving device, the bottom plate is opened with opening;Clay blank is put into the opening of clamp, first driving device starts, first driving device drives front pressing plate and rear pressing plate to each other, and front extrusion part and rear extrusion part form clay blank first extrusion mechanism by each other, clay blank first extrusion mechanism is pre-extruded to clay blank, then second driving device starts, when second driving device drives left pressing plate and right pressing plate respectively to each other in the direction of opening, front extrusion part and rear extrusion part form clay blank second extrusion mechanism by each other, while left clamp opening and right clamp opening form molding clamp opening, molding clamp opening clamps clay blank, cause the diameter of clay blank in clamping position to produce change, to form the clay blank of variable diameter, to realize the automatic variable diameter processing of clay blank.

Description

Technical Field

[0001] This invention relates to the field of ceramic production, and in particular to a clamp for changing the diameter of clay blanks. Background Technology

[0002] In the existing automated porcelain molding production line, the feeding device cuts the clay column into clay segments of a certain length and then puts them into the mold conveying device. The rolling device rolls the clay column into the required shape to obtain the porcelain semi-finished product. Then, the drying device removes the excess water from the porcelain semi-finished product. The demolding device separates the porcelain semi-finished product from the mold. The edge washing device washes the edges of the porcelain semi-finished product to obtain the finished porcelain product.

[0003] In the aforementioned automated porcelain forming production line, if it is necessary to manufacture porcelain with large diameter differences, a mold with diameter differences needs to be matched. Since the feeding device can only cut clay segments of a certain length, but cannot change the diameter of the clay segments, it is difficult to put the clay segments into the mold. If the clay segments are forcibly squeezed into the mold, a lot of clay residue will be generated, which is difficult to clean. Summary of the Invention

[0004] The purpose of this invention is to provide a clamp for changing the diameter of the clay blank.

[0005] The objective of this invention is achieved as follows: A clamp for changing the diameter of a clay blank includes a base plate, a front pressure plate, a rear pressure plate, a left pressure plate, a right pressure plate, a first driving device, and a second driving device, wherein the base plate has an opening; The front pressure plate is slidably mounted on the base plate, with one end of the front pressure plate facing the opening direction to form a front extrusion section. The rear pressure plate is slidably mounted on the base plate, with one end of the rear pressure plate facing the opening direction to form a rear extrusion section. The front pressure plate and the rear pressure plate are respectively connected to the first driving device. The left pressure plate is slidably mounted on the base plate, with one end of the left pressure plate facing the opening direction to form a left extrusion part, and the left extrusion part is provided with a left clamping opening. The right pressure plate is slidably mounted on the base plate, with one end of the right pressure plate facing the opening direction to form a right extrusion part, and the right extrusion part is provided with a right clamping opening. The left pressure plate and the right pressure plate are respectively connected to the second driving device. When the first driving device drives the front pressure plate and the rear pressure plate to move towards the opening direction at the same time, the front extrusion section and the rear extrusion section move towards each other to form a primary extrusion mechanism for clay blanks. When the second driving device drives the left and right pressure plates to move closer to the opening direction, the front extrusion section and the rear extrusion section move closer to each other to form a two-stage extrusion mechanism for clay blanks, while the left clamp and the right clamp form a shaping clamp.

[0006] When the clay blank is placed into the opening of the clamp, the first drive device is activated, causing the front and rear pressure plates to move closer together. The front and rear extrusion sections move closer together to form the first-stage extrusion mechanism for the clay blank, which pre-extrudes the clay blank. Then, the second drive device is activated, causing the left and right pressure plates to move closer together towards the opening. The front and rear extrusion sections move closer together to form the second-stage extrusion mechanism for the clay blank. At the same time, the left and right clamps form a shaping clamp, which clamps the clay blank, causing the diameter of the clay blank at the clamping position to change, thus forming a variable-diameter clay blank. This achieves automatic diameter change processing of the clay blank. The principle is simple and reliable. Moreover, the diameter change process of the clay blank is smoother because the clay blank is pre-extruded before being clamped and extruded, resulting in a higher yield.

[0007] The objective of this invention can also be achieved by the following technical measures: Furthermore, both the left and right clamps are arc-shaped, and they converge to form a circular clamping opening. Because the clamping opening is circular, the clamped portion of the clay blank is cylindrical, meeting user needs. If the user requires a different shape, simply replace the shapes of the left and right clamps; the operation is simple.

[0008] Furthermore, the first driving device includes a first cylinder, a front connecting plate, a rear connecting plate, a first slide rail, a front slider, and a rear slider. The first slide rail is vertically arranged on the surface of the base plate, and the front slider and the rear slider are respectively slidably arranged on the first slide rail. The front connecting plate is placed on the base plate and connected to the front slider. The front connecting plate can slide along the first slide rail. The front connecting plate is provided with a front connecting foot. The base plate has a front movable opening corresponding to the position of the front connecting foot. The front connecting foot extends through the front movable opening to the back of the base plate. The front movable opening limits the sliding distance of the front connecting foot, thereby limiting the sliding distance of the front connecting plate. The front pressure plate is connected to the front connecting plate. The rear connecting plate is placed on the base plate and connected to the rear slider. The rear connecting plate can slide along the first slide rail. The rear connecting plate is provided with a rear connecting foot. The base plate has a rear movable opening corresponding to the position of the rear connecting foot. The rear connecting foot extends through the rear movable opening to the back of the base plate. The rear movable opening limits the sliding distance of the rear connecting foot, thereby limiting the sliding distance of the rear connecting plate. The rear pressure plate is connected to the rear connecting plate. The first cylinder includes a cylinder body and a first piston rod. The first piston rod is connected to the front connecting foot, and the cylinder body is connected to the rear connecting foot. When the first cylinder works, it causes the front connecting plate and the rear connecting plate to move closer to each other or further away from each other, thereby causing the front pressure plate and the rear pressure plate to move closer to each other or further away from each other.

[0009] The first piston rod of the first cylinder is connected to the front connecting foot, and the cylinder body of the first cylinder is connected to the rear connecting foot. When the first cylinder body is working, the first piston rod extends outward to push the front connecting foot and the front connecting plate, thereby moving the front pressure plate. When the front connecting plate moves into position, the cylinder body extends outward to push the rear connecting foot and the rear connecting plate, thereby moving the rear pressure plate until the rear connecting plate moves into position. At this time, the front pressure plate and the rear pressure plate move closer to each other. Therefore, the movement of the front pressure plate and the rear pressure plate can be controlled by the first cylinder, reducing costs.

[0010] Furthermore, the second driving device includes a second cylinder, a third cylinder, a left connecting plate, a right connecting plate, a second slide rail, a third slide rail, a left slider, and a right slider. The second slide rail is arranged laterally on the left side of the base plate. The left slider is slidably arranged on the second slide rail. The left connecting plate is arranged on the left side of the base plate and connected to the left slider. The left connecting plate can slide along the second slide rail. The left pressure plate and the left connecting plate are connected. The second cylinder is fixed on the left side of the base plate. The second piston rod of the second cylinder is connected to the left connecting plate. The second cylinder drives the left connecting plate to move, thereby driving the left pressure plate to move.

[0011] The third slide rail is arranged horizontally on the right side of the base plate, the right slider is slidably arranged on the third slide rail, and the right connecting plate is arranged on the right side of the base plate and connected to the right slider. The right connecting plate can slide along the third slide rail. The right pressure plate and the right connecting plate are connected. The third cylinder is fixed on the right side of the base plate. The third piston rod of the third cylinder is connected to the right connecting plate. The third cylinder drives the right connecting plate to move, thereby driving the right pressure plate to move.

[0012] The second cylinder pushes the left pressure plate to move through the left connecting plate, and the third cylinder pushes the right pressure plate to move through the right connecting plate, thereby enabling the left and right pressure plates to move closer to or separate from each other, thus clamping or releasing the clay blank. The principle is simple and reliable.

[0013] Furthermore, it also includes a clay blank cutting device, which includes a clay blank cutter and a fourth cylinder. The clay blank cutter is slidably mounted on the base plate and located below the left and right pressure plates. One end of the clay blank cutter is connected to the fourth piston rod of the fourth cylinder, and the other end of the clay blank cutter faces the opening. The fourth cylinder drives the clay blank cutter to extend and retract.

[0014] During the process of changing the diameter of the clay blank, excess clay blank is squeezed out. At this time, the fourth cylinder drives the clay blank cutter to move towards the opening to remove the excess clay blank, thus completing the cleaning of the excess clay blank.

[0015] Furthermore, the clay cutter has a clay residue drop outlet. When the clay cutter extends towards the opening, the shaping clamp, the clay residue drop outlet, and the opening are connected. During the clay blank diameter change process, excess clay blank is squeezed out. At this time, the fourth cylinder drives the clay cutter to move towards the opening to cut off the excess clay blank. When the shaping clamp, the clay residue drop outlet, and the opening are connected, the excess clay blank falls along the shaping clamp and the clay residue drop outlet towards the opening, completing the clay blank collection.

[0016] Furthermore, the clay blank cutting device also includes a support plate, which is set on the base plate. The fourth cylinder is fixed on the support plate, and the clay blank cutter is slidably set on the support plate and connected to the fourth piston rod of the fourth cylinder.

[0017] The beneficial effects of this invention are as follows: This invention involves placing a clay blank into the opening of a clamp. A first driving device is activated, causing the front and rear pressure plates to move closer together, forming a primary extrusion mechanism. This mechanism pre-extrudes the clay blank. Then, a second driving device is activated, causing the left and right pressure plates to move closer towards the opening. This forms a secondary extrusion mechanism, simultaneously forming a shaping clamp with the left and right jaws. The shaping clamp clamps the clay blank, causing a change in the diameter of the clay blank at the clamping position, resulting in a variable-diameter clay blank. This achieves automatic diameter reduction processing of the clay blank. The principle is simple and reliable. Furthermore, the diameter reduction process involves pre-extrusion of the clay blank before clamping and extrusion, resulting in a smoother diameter reduction process and a higher yield.

[0018] In this invention, the first piston rod of the first cylinder is connected to the front connecting foot, and the cylinder body of the first cylinder is connected to the rear connecting foot. When the first cylinder body is working, the first piston rod extends outward to push the front connecting foot and the front connecting plate, thereby moving the front pressure plate. When the front connecting plate is in place, the cylinder body extends outward to push the rear connecting foot and the rear connecting plate, thereby moving the rear pressure plate until the rear connecting plate is in place. At this time, the front pressure plate and the rear pressure plate move closer to each other. Therefore, the movement of the front pressure plate and the rear pressure plate can be controlled by the first cylinder, reducing costs.

[0019] In this invention, excess clay is extruded during the clay blank diameter change process. At this time, the fourth cylinder drives the clay blank cutter to move towards the opening to remove the excess clay blank. When the molding clamp, the clay slag drop outlet and the opening are connected, the excess clay blank falls along the molding clamp and the clay slag drop outlet towards the opening, thus completing the clay blank collection. Attached Figure Description

[0020] Figure 1 A schematic diagram of a clamp for changing the diameter of a clay blank (the front and rear pressure plates are separated from each other, and the left and right pressure plates are separated from each other).

[0021] Figure 2Another angle diagram of the clamp used to change the diameter of the clay blank (the front and rear pressure plates are separated from each other, and the left and right pressure plates are separated from each other).

[0022] Figure 3 A top view of the fixture used to change the diameter of the clay blank (with the front and rear pressure plates separated from each other, and the left and right pressure plates separated from each other).

[0023] Figure 4 Left view of the fixture for changing the diameter of the clay blank (front and rear pressure plates separated from each other, left and right pressure plates separated from each other).

[0024] Figure 5 A schematic diagram of a clamp for changing the diameter of a clay blank (the front and rear pressure plates are separated from each other, the left and right pressure plates are separated from each other, and the clay blank is placed into the opening).

[0025] Figure 6 for Figure 5 A sectional view.

[0026] Figure 7 A schematic diagram of a clamp for changing the diameter of a clay blank (the front and rear pressure plates are close together, and the left and right pressure plates are close together).

[0027] Figure 8 Another angle diagram of the clamp used to change the diameter of the clay blank (the front and rear pressure plates are close to each other, and the left and right pressure plates are close to each other).

[0028] Figure 9 A top view of the fixture used to change the diameter of the clay blank (with the front and rear pressure plates close together, and the left and right pressure plates close together).

[0029] Figure 10 Left view of the fixture for changing the diameter of the clay blank (front and rear pressure plates close together, left and right pressure plates close together).

[0030] Figure 11 A schematic diagram of a clamp for changing the diameter of a clay blank (with the front and rear pressure plates close together, and the left and right pressure plates close together, and the clay blank is placed into the opening).

[0031] Figure 12 for Figure 11 A sectional view.

[0032] Figure 13 An exploded view of the fixture used to change the diameter of the clay blank.

[0033] Figure 14 Another exploded view of the fixture used to change the diameter of the clay blank. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments: Implementation examples, in conjunction with Figures 1 to 14 As shown, a clamp for changing the diameter of a clay blank includes a base plate 1, a front pressure plate 2, a rear pressure plate 3, a left pressure plate 4, a right pressure plate 5, a first driving device 6, and a second driving device 7. The base plate 1 has an opening 11. The front pressure plate 2 is slidably mounted on the base plate 1. One end of the front pressure plate 2 forms a front extrusion section 21 facing the opening 11. The rear pressure plate 3 is slidably mounted on the base plate 1. One end of the rear pressure plate 3 forms a rear extrusion section 31 facing the opening 11. The front pressure plate 2 and the rear pressure plate 3 are respectively connected to the first driving device 6. The left pressure plate 4 is slidably mounted on the base plate 1. One end of the left pressure plate 4 forms a left extrusion part facing the opening 11. The left extrusion part is provided with a left clamping opening 41. The right pressure plate 5 is slidably mounted on the base plate 1. One end of the right pressure plate 5 forms a right extrusion part facing the opening 11. The right extrusion part is provided with a right clamping opening 51. The left pressure plate 4 and the right pressure plate 5 are respectively connected to the second driving device 7. When the first driving device 6 drives the front pressure plate 2 and the rear pressure plate 3 to move towards the opening 11 at the same time, the front extrusion part 21 and the rear extrusion part 31 move towards each other to form a primary extrusion mechanism for clay blanks. When the second driving device 7 drives the left pressure plate 4 and the right pressure plate 5 to move closer to the opening 11, the front extrusion part 21 and the rear extrusion part 31 move closer to each other to form a two-stage extrusion mechanism for clay blanks. At the same time, the left clamping opening 41 and the right clamping opening 51 form a shaping clamping opening 9.

[0035] Furthermore, the left clamp 41 is an arc-shaped clamp, the right clamp 51 is an arc-shaped clamp, and the left clamp 41 and the right clamp 51 are brought together to form a circular clamp 9.

[0036] Furthermore, the first driving device 6 includes a first cylinder 61, a front connecting plate 62, a rear connecting plate 63, a first slide rail 64, a front slider 65, and a rear slider 66. The first slide rail 64 is vertically arranged on the surface of the base plate 1, and the front slider 65 and the rear slider 66 are respectively slidably arranged on the first slide rail 64. The front connecting plate 62 is placed on the base plate 1 and connected to the front slider 65. The front connecting plate 62 can slide along the first slide rail 64. The front connecting plate 62 is provided with a front connecting foot 621. The base plate 1 has a front movable opening 12 corresponding to the position of the front connecting foot 621. The front connecting foot 621 extends through the front movable opening 12 to the back of the base plate 1. The front movable opening 12 limits the sliding distance of the front connecting foot 621, thereby limiting the sliding distance of the front connecting plate 62. The front pressure plate 2 is connected to the front connecting plate 62. The rear connecting plate 63 is placed on the base plate 1 and connected to the rear slider 66. The rear connecting plate 63 can slide along the first slide rail 64. The rear connecting plate 63 is provided with a rear connecting foot 631. The base plate 1 has a rear movable opening 13 corresponding to the position of the rear connecting foot 631. The rear connecting foot 631 extends through the rear movable opening 13 to the back of the base plate 1. The rear movable opening 13 limits the sliding distance of the rear connecting foot 631, thereby limiting the sliding distance of the rear connecting plate 63. The rear pressure plate 3 is connected to the rear connecting plate 63. The first cylinder 61 includes a cylinder body 611 and a first piston rod 612. The first piston rod 612 is connected to the front connecting foot 621, and the cylinder body 611 is connected to the rear connecting foot 631. When the first cylinder 61 works, it drives the front connecting plate 62 and the rear connecting plate 63 to move closer or further apart, thereby driving the front pressure plate 2 and the rear pressure plate 3 to move closer or further apart.

[0037] Furthermore, the second driving device 7 includes a second cylinder 71, a third cylinder 72, a left connecting plate 73, a right connecting plate 74, a second slide rail 75, a third slide rail 76, a left slider 77, and a right slider 78. The second slide rail 75 is arranged laterally on the left side of the base plate 1. The left slider 77 is slidably arranged on the second slide rail 75. The left connecting plate 73 is arranged on the left side of the base plate 1 and connects to the left slider 77. The left connecting plate 73 can slide along the second slide rail 75. The left pressure plate 4 and the left connecting plate 73 are connected. The second cylinder 71 is fixed on the left side of the base plate 1. The second piston rod of the second cylinder 71 is connected to the left connecting plate 73. The second cylinder 71 drives the left connecting plate 73 to move, thereby driving the left pressure plate 4 to move.

[0038] The third slide rail 76 is arranged horizontally on the right side of the base plate 1, the right slider 78 is slidably arranged on the third slide rail 76, and the right connecting plate 74 is arranged on the right side of the base plate 1 and connected to the right slider 78. The right connecting plate 74 can slide along the third slide rail 76. The right pressure plate 5 and the right connecting plate 74 are connected. The third cylinder 72 is fixed on the right side of the base plate 1. The third piston rod of the third cylinder 72 is connected to the right connecting plate 74. The third cylinder 72 drives the right connecting plate 74 to move, thereby driving the right pressure plate 5 to move.

[0039] Furthermore, it also includes a clay blank cutting device 8, which includes a clay blank cutter 81 and a fourth cylinder 82. The clay blank cutter 81 is slidably mounted on the base plate 1 and located below the left pressure plate 4 and the right pressure plate 5. One end of the clay blank cutter 81 is connected to the fourth piston rod 821 of the fourth cylinder 82, and the other end of the clay blank cutter 81 faces the opening 11. The fourth cylinder 82 drives the clay blank cutter 81 to extend and retract.

[0040] Furthermore, the clay cutting blade 81 has a clay slag drop opening 811. When the clay cutting blade 81 extends toward the opening 11, the shaping clamp 9, the clay slag drop opening 811 and the opening 11 are connected.

[0041] Furthermore, the clay blank cutting device 8 also includes a support plate 83, which is disposed on the base plate 1. The fourth cylinder 82 is fixed on the support plate 83, and the clay blank cutter 81 is slidably disposed on the support plate 83 and connected to the fourth piston rod 821 of the fourth cylinder 82.

[0042] Working principle: The clay blank 100 is placed into the opening 11 of the fixture, and then the first cylinder 61 is started. The first cylinder 61 drives the front pressure plate 2 and the rear pressure plate 3 to move towards the opening 11 to form the first-stage extrusion mechanism of the clay blank 100. The first-stage extrusion mechanism of the clay blank 100 pre-extrudes the clay blank 100.

[0043] Then, the second cylinder 71 is started, which drives the left pressure plate 4 to move towards the opening 11. The third cylinder 72 is started, which drives the right pressure plate 5 to move towards the opening 11. When the left pressure plate 4 and the right pressure plate 5 approach each other, the left clamping opening 41 and the right clamping opening 51 approach each other to form a circular shaping clamping opening 9. The shaping clamping opening 9 clamps the clay blank 100, causing the diameter of the clay blank 100 at the clamping position to change, thereby forming a clay blank 100 with a variable diameter.

[0044] Finally, the fourth cylinder 82 is activated, and the fourth cylinder 82 drives the clay blank 100 cutter 81 to extend towards the opening 11 to cut off the excess clay blank 100. When the shaping clamp 9, the clay slag drop outlet 811 and the opening 11 are connected, the excess clay blank 100 falls into the opening 11 along the shaping clamp 9 and the clay slag drop outlet 811.

Claims

1. A clamp for changing the diameter of a clay blank, comprising a base plate, a front pressure plate, a rear pressure plate, a left pressure plate, a right pressure plate, a first driving device, and a second driving device, wherein the base plate has an opening; The front pressure plate is slidably mounted on the base plate, with one end of the front pressure plate facing the opening direction to form a front extrusion section. The rear pressure plate is slidably mounted on the base plate, with one end of the rear pressure plate facing the opening direction to form a rear extrusion section. The front pressure plate and the rear pressure plate are respectively connected to the first driving device. The left pressure plate is slidably mounted on the base plate, with one end of the left pressure plate facing the opening direction to form a left extrusion part, and the left extrusion part is provided with a left clamping opening. The right pressure plate is slidably mounted on the base plate, with one end of the right pressure plate facing the opening direction to form a right extrusion part, and the right extrusion part is provided with a right clamping opening. The left pressure plate and the right pressure plate are respectively connected to the second driving device. When the first driving device drives the front pressure plate and the rear pressure plate to move towards the opening direction at the same time, the front extrusion section and the rear extrusion section move towards each other to form a primary extrusion mechanism for clay blanks. When the second driving device drives the left and right pressure plates to move closer to the opening direction, the left extrusion section and the right extrusion section move closer to each other to form a two-stage extrusion mechanism for clay blanks, while the left clamp and the right clamp form a shaping clamp.

2. The apparatus of claim 1 wherein: The left clamp is an arc-shaped clamp, the right clamp is an arc-shaped clamp, and the left and right clamps are brought together to form a circular clamp shape.

3. The apparatus of claim 1 wherein: The first driving device includes a first cylinder, a front connecting plate, a rear connecting plate, a first slide rail, a front slider, and a rear slider. The first slide rail is vertically arranged on the surface of the base plate, and the front slider and the rear slider are respectively slidably arranged on the first slide rail. The front connecting plate is placed on the base plate and connected to the front slider. The front connecting plate can slide along the first slide rail. The front connecting plate is provided with a front connecting foot. The base plate has a front movable opening corresponding to the position of the front connecting foot. The front connecting foot extends through the front movable opening to the back of the base plate. The front movable opening limits the sliding distance of the front connecting foot, thereby limiting the sliding distance of the front connecting plate. The front pressure plate is connected to the front connecting plate. The rear connecting plate is placed on the base plate and connected to the rear slider. The rear connecting plate can slide along the first slide rail. The rear connecting plate is provided with a rear connecting foot. The base plate has a rear movable opening corresponding to the position of the rear connecting foot. The rear connecting foot extends through the rear movable opening to the back of the base plate. The rear movable opening limits the sliding distance of the rear connecting foot, thereby limiting the sliding distance of the rear connecting plate. The rear pressure plate is connected to the rear connecting plate. The first cylinder includes a cylinder body and a first piston rod. The first piston rod is connected to the front connecting foot, and the cylinder body is connected to the rear connecting foot. When the first cylinder works, it causes the front connecting plate and the rear connecting plate to move closer to each other or further away from each other, thereby causing the front pressure plate and the rear pressure plate to move closer to each other or further away from each other.

4. The apparatus of claim 1 wherein: The second driving device includes a second cylinder, a third cylinder, a left connecting plate, a right connecting plate, a second slide rail, a third slide rail, a left slider, and a right slider. The second slide rail is arranged laterally on the left side of the base plate. The left slider is slidably mounted on the second slide rail. The left connecting plate is located on the left side of the base plate and connected to the left slider. The left connecting plate can slide along the second slide rail. The left pressure plate and the left connecting plate are connected. The second cylinder is fixed on the left side of the base plate. The second piston rod of the second cylinder is connected to the left connecting plate. The second cylinder drives the left connecting plate to move, thereby driving the left pressure plate to move. The third slide rail is arranged horizontally on the right side of the base plate, the right slider is slidably arranged on the third slide rail, and the right connecting plate is arranged on the right side of the base plate and connected to the right slider. The right connecting plate can slide along the third slide rail. The right pressure plate and the right connecting plate are connected. The third cylinder is fixed on the right side of the base plate. The third piston rod of the third cylinder is connected to the right connecting plate. The third cylinder drives the right connecting plate to move, thereby driving the right pressure plate to move.

5. The apparatus of claim 1 wherein: It also includes a clay blank cutting device, which includes a clay blank cutter and a fourth cylinder. The clay blank cutter is slidably mounted on the base plate and located below the left and right pressure plates. One end of the clay blank cutter is connected to the fourth piston rod of the fourth cylinder, and the other end of the clay blank cutter faces the opening. The fourth cylinder drives the clay blank cutter to extend and retract.

6. The fixture for changing the diameter of the green according to claim 5, wherein: The clay cutter has a clay slag drop opening. When the clay cutter extends toward the opening, the shaping clamp, the clay slag drop opening, and the opening are connected.

7. The fixture for changing the diameter of the green according to claim 6, wherein: The clay blank cutting device also includes a support plate, which is set on the base plate. The fourth cylinder is fixed on the support plate, and the clay blank cutter is slidably set on the support plate and connected to the fourth piston rod of the fourth cylinder.

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