Bent pottery pipe blank forming device

Abstract

The utility model relates to a bent earthenware pipe blank forming device which comprises an extruder, a rotary table and a model tray, the extruder can extrude a tubular blank, the rotary table can drive the model tray to rotate, and a shaping frame is arranged on the model tray. The model tray rotates by a circle, so that a blank extruded by the extruder is wound on the shaping frame to form an annular structure, and then the bent pipe with the zigzag angle is obtained through cutting; when the device is used for producing the bent pipe, the production efficiency can be improved, and meanwhile, the shaping procedure is reduced.

Description

Technical Field

[0001] This utility model relates to equipment for making gating systems, and more particularly to a forming device for making ceramic gating system blanks with curved pipe structures. Background Technology

[0002] In sand casting, the gating pipe serves as a channel for molten steel flow and is a commonly used consumable. It is generally made of refractory materials, and traditionally, gating pipes are made of ceramic. The process includes clay preparation, extrusion of the billet pipe, shaping, and firing. During billet pipe extrusion, a vacuum extruder is often used to extrude the clay into a straight tube. However, due to the complex and often crisscrossing arrangement of gating pipes in sand casting, elbows or bends are needed for connection or transition. Therefore, when preparing ceramic pipes with a certain degree of curvature, operators manually bend the pipes during the billet extrusion stage. Then, workers at the shaping station further adjust the curvature in a mold with a standard bending angle to ensure the bending angle meets design requirements. Each operator bends one pipe at a time, and the shaping station then places the bend into a mold to verify the bending points, resulting in low production efficiency and numerous steps. Utility Model Content

[0003] To improve the production efficiency of the aforementioned ceramic tube blanks with curved shapes and reduce the number of processes, the technical solution adopted by this utility model is as follows:

[0004] A bending ceramic tube blank forming device includes an extruder, a turntable, and a mold tray. A shaping frame is provided on the mold tray. The mold tray is positioned on the turntable and rotated by the turntable. During the rotation of the mold tray, the blank extruded by the extruder can wrap around the outer ring of the shaping frame and form a ring structure similar to the outline of the shaping frame.

[0005] Furthermore, the forming frame is provided with a cutting groove for positioning the blank cutting position.

[0006] Furthermore, a positioning groove is provided on the turntable, and a positioning block that mates with the positioning groove is provided on the model tray.

[0007] Furthermore, the positioning groove is an L-shaped through groove.

[0008] Furthermore, the turntable rotates.

[0009] Furthermore, a guide frame matching the outline of the shaping frame is provided at the bottom of the turntable. A driving wheel and a driven wheel that clamp the guide frame are respectively provided on the inner and outer walls of the guide frame. The driving wheel drives the guide frame to move the turntable so that the turntable moves along the outline trajectory of the shaping frame.

[0010] The above technical solution ensures that the bending part of the billet meets the design requirements after it is extruded from the extruder and wound around a pre-designed model with a standard bending arc. Furthermore, the bent tubes wound on the model can be cut to the required length at one time to obtain several compliant bent tubes, which improves production efficiency and reduces the forming process. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the present invention;

[0012] Figure 2 To create a schematic diagram of the curved turntable structure;

[0013] Figure 3 This is a schematic diagram of the tray structure of the arc-shaped bent pipe model of the present invention;

[0014] Figure 4 To adopt Figure 3 A schematic diagram of the state of the model tray winding blank;

[0015] Figure 5 From Figure 4 A schematic diagram showing the state of a partially bent tube after it has been cut from a model tray with blanks wrapped around it, and the shape of the bent tube obtained.

[0016] Figure 6 To create a schematic diagram of an L-shaped pipe bending turntable structure;

[0017] Figure 7 This is a schematic diagram of the L-shaped bend pipe model tray structure of the present invention;

[0018] Figure 8 To adopt Figure 7 A schematic diagram of the state of the model tray winding blank;

[0019] Figure 9 From Figure 8 A schematic diagram showing the state of a part of an L-shaped bend after cutting out a portion of the blank from a model with the blank wrapped around it, and the shape of the obtained L-shaped bend;

[0020] Figure 10 A schematic diagram of the forming tray structure used to produce blanks with a bending angle of less than 90°;

[0021] Figure 11 A schematic diagram of the forming tray structure used to produce blanks with a bending angle greater than 90°. Detailed Implementation

[0022] To better understand the concept of this invention, the technical solution of this invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1The forming apparatus shown includes an extruder 1, which can continuously extrude the prepared clay material into a tubular blank a through the exit die. In order to ensure the quality and density of the blank and avoid excessive gas in the blank, a vacuum extruder is often used to extrude the tubular blank.

[0024] A turntable 2 is provided at the output end of the extruder 1, which can rotate according to a set path.

[0025] A model tray 3 is provided on the turntable 2. The model tray 3 includes a pallet 3-1 that can be positioned on the turntable 2, and a shaping frame 3-2 provided on the pallet 3-1.

[0026] During operation, the extruder 1 extrudes the billet, and the turntable 2 drives the mold tray 3 to rotate. With the assistance of the operator, the billet is wound around the shaping frame 3-2 of the mold tray 3 for one revolution, and finally a billet with a basically connected ring structure is obtained. Due to the shaping by the shaping frame 3-2, the bending angle of each curved part of the billet wound on the mold tray 3 meets the design requirements. After that, the billet on the mold tray 3 is cut to obtain a standard curved tube billet with a curved arc.

[0027] The component structure that achieves the above functions will be described in further detail below.

[0028] like Figure 2 The turntable 2 shown includes a table surface 2-1, a rotating shaft 2-2 and a drive mechanism for driving the table surface 2-1 to rotate around the rotating shaft 2-2 at the bottom of the table surface 2-1. In this embodiment, the drive mechanism is a roller 2-3 driven by a motor.

[0029] A positioning mechanism is provided on the tabletop 2-1, such as the positioning groove 2-4 in this embodiment. Figure 3 The model tray 3 shown includes a tray plate 3-1. The bottom of the tray plate 3-1 is provided with a positioning block 3-3 that can be inserted into a positioning groove 2-4. The cooperation between the positioning block 3-3 and the positioning groove 2-4 positions the model tray 3 onto the turntable 2, allowing the model tray 3 to rotate along a certain trajectory. In this embodiment, the model tray 3 is used to make curved ceramic tube blanks. A circular shaping frame 3-2 is set at the center of the model tray 3. Figure 4 The extruded preform from the extruder 1 is wound around the outer ring of the shaping frame 3-2, so that the ceramic tube preform is wound into a ring-shaped structure similar to the outline of the shaping frame 3-2.

[0030] After the above winding is completed, the extruded billet from extruder 1 is cut, ensuring that the ends of the billet on mold tray 3 remain basically connected. Mold tray 3 is then removed from turntable 2, and the operator at the unloading station cuts out curved tubes that meet the specifications from mold tray 3 according to the requirements of the curved tube, obtaining... Figure 5The embodiment shown depicts a 1 / 4 arc-shaped curved pipe b. To facilitate cutting by the operator at the material cutting station, a cutting groove 3-4 can be pre-cut on the shaping frame 3-2. Using a wire rope cutter along the cutting groove 3-4, the required arc-shaped curved pipe can be cut quickly and accurately. Taking this embodiment as an example, four sections of arc-shaped curved pipe b with right-angle bends can be cut in one go, greatly improving efficiency. Moreover, the bending angle of the cut arc-shaped curved pipe b is constrained by the shaping frame 3-2 to meet the design requirements, and no further correction is required.

[0031] In the above embodiment, the outer surface of the shaping frame 3-2 for winding and shaping the billet is preferably tangent to the direction of the billet extrusion by the extruder 1. The rotation center of the turntable 2 is aligned with the center of the shaping frame 3-2 through a positioning mechanism to ensure that the shaping frame 3-2 rotates around the center. This ensures that the distance from the extruder 1 to the shaping frame 3-2 remains straight, preventing the billet from bending before winding and affecting the winding effect. It is also important to note that the rotation speed of the turntable 2 needs to be controlled to ensure that the linear velocity of the outer ring of the shaping frame 3-2 is basically consistent with the extrusion speed of the extruder 1 to prevent the billet from being torn or piling up. Therefore, in addition to driving the turntable 2 to rotate through a drive mechanism as given in this embodiment, the turntable 2 can also be allowed to rotate freely around the shaft 2-2 without being driven by a drive mechanism. When the extruder 1 extrudes the billet, the thrust of the extrusion drives the turntable 2 to rotate autonomously at the extrusion speed to achieve billet winding.

[0032] In addition to the aforementioned curved bends, ceramic tubes can also be designed as L-shaped bends, which consist of at least one straight section and one bend. The L-shaped bend forming device will be further described in detail below with reference to the attached drawings. Its basic working principle is the same as that of the curved bend. The blank extruded by the extruder 1 is wound onto the mold tray 3 for shaping and then cut into an L-shaped bend. Since the L-shaped bend has an additional straight section compared to the curved bend, the shape of the shaping frame 3-2 is slightly different, the movement trajectory of the mold tray 3 is also slightly different, and consequently the structure of the turntable 2 that controls the movement of the mold tray 3 is also different.

[0033] like Figure 6The turntable 2 shown includes a tabletop 2-1, the bottom of which is supported by several ball-headed pillars 2-6, enabling the turntable 2 to move and rotate in any direction. A guide frame 2-5 with the same shape and specifications as the shaping frame 3-2 is also provided at the bottom of the tabletop 2-1. The forming device needs to produce a blank with a long straight tube and an arc-shaped bend. Therefore, the guide frame 2-5 and the shaping frame 3-2 are made into rectangular shapes with arc-shaped chamfers. A driven wheel 2-7 and a driving wheel 2-8 are respectively provided on the symmetrical parts of the inner and outer walls of the guide frame 2-5 to clamp the guide frame 2-5. The driving wheel 2-8 is driven by a motor to move the turntable 2. The driven wheel 2-7 plays a positioning and guiding role. When the driving wheel 2-8 and the driven wheel 2-7 are in the curved arc section of the guide frame 2-5, the turntable 2 rotates. When the driving wheel 2-8 and the driven wheel 2-7 are in the straight section of the guide frame 2-5, the turntable 2 moves in a straight line. A positioning mechanism is also provided on the tabletop 2-1, such as positioning groove 2-4 in this embodiment. Figure 7 The model tray 3 shown has a positioning block 3-3 at the bottom of the tray 3-1. After the positioning block 3-3 is inserted into the positioning slot 2-4, the model tray 3 is positioned. The upper surface of the tray 3-1 is provided with a shaping frame 3-2. After positioning, the shaping frame 3-2 on the model tray 3 is basically in the same position as the guide frame 2-5 at the bottom of the table 2-1, so that the moving trajectory of the shaping frame 3-2 is consistent with the moving trajectory of the guide frame 2-5.

[0034] like Figure 8 As shown, when the model tray 3 moves under the drive of the turntable 2, the billet extruded by the extruder 1 is wound onto the shaping frame 3-2, forming a rectangular ring with an arc-shaped chamfer. It is important to note that to prevent the billet from bending and becoming difficult to adhere to the shaping frame 3-2 during the distance from the extrusion section of the extruder 1 to the model tray 3, the arc-shaped chamfer of the shaping frame 3-2 should rotate tangentially to the direction of the extruded billet, while the straight section of the shaping frame 3-2 should move in the same direction as the extruded billet. To ensure the integrity of the curved section of the billet and sufficient allowance for cutting to the specified length in the straight section, it is best to start winding the billet from the middle of the straight section of the shaping frame 3-2. After one turn of the billet, the extruded billet from the extruder 1 should be cut off, and the billet wound on the shaping frame 3-2 should be joined end to end to form a ring. Of course, if the straight section is relatively short, the turntable 2 and the model tray 3 can still be used to wind the billet by rotating around the center of the shaping frame 3-2.

[0035] It can be seen that, regardless of whether the model tray 3 in this embodiment involves both rotation and linear movement, the overall purpose is to enable the model tray 3 to rotate so that the blank can be wound onto the shaping frame. This can be considered as... Figure 4 The given embodiments operate in the same way.

[0036] like Figure 9After removing the mold tray 3 containing the wound blank from the turntable 2, it is cut according to specifications to obtain four L-shaped bend blanks as shown in the figure. Since the bends are shaped by the shaping frame 3-2, the specifications of the L-shaped bends meet the design requirements, and no further correction is needed. Similarly, to facilitate the quick cutting of L-shaped bends that meet the specifications, cutting grooves 3-4 are pre-set on the shaping frame (3-2) as marking points for the cutting area.

[0037] Of course, in addition to the above-mentioned shaped bends, bends with different bending angles can also be made according to design requirements. The method used is the same as the method for making bends described above. A shaping frame is prepared according to the required bend shape, and the extruded blank is wound around the shaping frame 3-2 times to form a ring. Then, it is cut along the required cutting area to obtain the desired bend blank. Here are two more model tray structures for making different bending angles, such as... Figure 10 The model bracket 3 shown is designed to create a bending angle of less than 90°, or as shown in the image. Figure 11 The model tray 3 shown is designed to create bending angles greater than 90°. When the blank is wound, the blank can be wound around the shaping frame once to form a ring by rotating the model tray. Then, the ring blank on the model tray is cut to obtain the required bent pipe.

[0038] Furthermore, to facilitate the loading and unloading of model tray 3, such as... Figure 6 The positioning groove 2-4 shown can be set as a positioning groove with right-angle guidance. The forming station pushes the forming tray 3 into the positioning groove 2-4 from one side of the positioning groove 2-4 for positioning. After the turntable rotates one revolution, the cutting and unloading station can pull out the model bracket 3 from the positioning groove 2-4 on the other side. This facilitates the continuous operation between the two stations and avoids excessive time delay when changing the model bracket 3 on the turntable 2, which would cause excessive ends to need to be cut off and discarded when the extruded blank is rewound.

Claims

1. A bending ceramic tube blank forming device, comprising an extruder (1), characterized in that: It also includes a turntable (2) and a model tray (3), on which a shaping frame (3-2) is provided; The model tray (3) is positioned on the turntable (2) and rotated by the turntable (2). During the rotation of the model tray (3), the blank extruded by the extruder (1) can be wrapped around the outer ring of the shaping frame (3-2) and form a ring structure similar to the outline of the shaping frame (3-2).

2. The bending ceramic tube blank forming device according to claim 1, characterized in that: The forming frame (3-2) is provided with a cutting groove (3-4) for positioning the blank cutting position.

3. The bending ceramic tube blank forming device according to claim 1, characterized in that: A positioning groove (2-4) is provided on the turntable (2), and a positioning block (3-3) that cooperates with the positioning groove (2-4) is provided on the model tray (3).

4. The bending ceramic tube blank forming device according to claim 3, characterized in that: The positioning groove (2-4) is an L-shaped through groove.

5. A bending ceramic tube blank forming device according to any one of claims 1 to 4, characterized in that: The turntable (2) rotates.

6. A bending ceramic tube blank forming device according to any one of claims 1 to 4, characterized in that: A guide frame (2-5) matching the contour of the shaping frame (3-2) is provided at the bottom of the turntable (2). A drive wheel (2-8) and a driven wheel (2-7) for clamping the guide frame (2-5) are respectively provided on the inner and outer walls of the guide frame (2-5). The drive wheel (2-8) drives the guide frame (2-5) to move the turntable, so that the turntable (2) moves along the contour trajectory of the shaping frame (3-2).

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