Isostatic pressing graphite heavy carbon block forming die and forming method

Abstract

The invention belongs to the field of isostatic pressing graphite processing, and discloses an isostatic pressing graphite heavy carbon block forming die which comprises a die body. A die-casting machine pressure head; the pressure head of the die-casting machine is supported by a plurality of support pillars and is positioned above the opening of the die body; the bolt assembly comprises a bolt matched with the die body for use, a finger cylinder movably connected with the bolt, and a stroke cylinder for driving the bolt and the finger cylinder to do telescopic motion together; the discharging device comprises a base plate used for receiving the graphite heavy carbon block forming products, base plate stand columns and base plate driving air cylinders, the base plate stand columns are arranged on the base plate at intervals, and the base plate driving air cylinders are arranged on the two sides of the base plate and used for driving the base plate to enter and exit from the bottom of the mold body. The invention further provides a forming method. The forming mold is simple in structure, high in demolding efficiency and convenient, simple and controllable to operate.

Description

Technical Field

[0001] The invention belongs to the field of graphite heavy carbon block processing, and in particular relates to an isostatically pressed graphite heavy carbon block forming die. Background Art

[0002] Static graphite is an artificial graphite material obtained by baking and graphitization after the green body is formed by isostatic pressing process. With the development of photovoltaic market, the demand for isostatic graphite materials for thermal field materials is getting larger and larger. The solid green body formed by conventional process is very easy to crack during the heat treatment process due to its large size, which makes the production cost high. With the development of static graphite production industry, the high labor cost and production safety are becoming more and more urgent problems to be solved. The operation process after the existing static graphite production is completed is to manually pull the pin to lock the pressure head and mold of the die casting machine, and then lift the pressure head of the punching machine to drive the mold to lift, and then manually place four pads in the gap between the base of the die casting machine and the four corners below the mold, and then manually place the bottom plate on the base of the die casting machine, and then the pressure head of the die casting machine presses the heavy finished carbon block out of the mold and falls on the artificial prevention floor, and then manually pull out the bottom plate and carbon block to complete the demoulding work. This working mode has had two pain points for a long time. The first is that a large amount of manpower is spent guarding the unloading station of the die-casting machine, which is inefficient. The second is that during the manual operation, the air near the feeding port is too dusty and there is a safety risk. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies and defects mentioned in the above background technology and provide an isostatic graphite heavy carbon block forming mold and forming method with simple structure and high demoulding efficiency.

[0004] In order to solve the above technical problems, the technical solution proposed by the present invention is: an isostatic graphite heavy carbon block forming die, comprising: Mold body; The die-casting machine ram is supported by a plurality of top columns and is located above the opening of the die body; A latch assembly, comprising a latch used in conjunction with the mold body, a finger cylinder movably connected to the latch, and a travel cylinder driving the latch and the finger cylinder to move telescopically together; The discharging device includes a pad, pad columns and pad driving cylinders for receiving graphite heavy carbon block molding products, the pad columns are arranged on the pad at intervals, and the pad driving cylinders are arranged on both sides of the pad to drive the pad in and out of the bottom of the mold body; During die-casting, the finger cylinder clamps the pin when it is in a closed state, the stroke cylinder extends, and the pin locks the mold body and the die-casting machine pressure head. During demoulding, the finger cylinder releases the pin, and the pin is separated from the finger cylinder. The pin moves upward with the mold body, and the pad is driven by the pad drive cylinder to move to the bottom of the mold body. After the die-casting machine pressure head presses out the graphite heavy carbon block molded product, the graphite heavy carbon block molded product follows the pad to move for discharge.

[0005] In one embodiment, the finger cylinder includes a first finger and a second finger, and a clamping head is provided at the end of the latch. The first finger and the second finger move closer to or farther from each other to achieve the clamping or release of the clamping head of the finger cylinder.

[0006] In one embodiment, the latch assembly further includes a support frame and a guide rod, the support frame includes a lower base and an upper base, two parallel columns fixed on the lower base and the upper base, and the guide rod is connected to the upper base.

[0007] In one embodiment, there are two guide rods, which are connected to the upper base through linear bearings respectively; the latch assembly includes a push plate arranged at one end of the finger cylinder close to the stroke cylinder, and the two guide rods and the stroke cylinder are connected to the push plate.

[0008] In one embodiment, there are four pad columns, and the pad and the pad columns are integrally formed.

[0009] In one embodiment, a four-axis robot arm grasping device is also included, and the four-axis robot arm grasping device includes a connecting flange arranged at the end of the robot arm and a plurality of vacuum suction cups fixed on the connecting flange, which are used to suck the isostatically pressed graphite heavy carbon block molded products after discharge.

[0010] In one embodiment, an automatic powder loader is further included, and a discharge port of the automatic powder loader is located above the opening of the mold body.

[0011] In one embodiment, the mass of the graphite heavy carbon block molded product is greater than or equal to 128 kg and less than or equal to 200 kg.

[0012] Based on the same inventive concept, the present invention also provides a molding method using the isostatic graphite heavy carbon block molding die as described above, comprising the steps of: Injecting graphite molding powder into the mold body; Start the stroke cylinder, control the finger cylinder to drive the latch to move toward the mold body, the finger cylinder clamps the latch, and the latch locks the mold body and the die-casting machine pressure head; The die-casting machine's pressure head moves up and down to die-cast the powder to obtain a graphite heavy carbon block molding product; The finger cylinder releases the latch, and the stroke cylinder moves in the opposite direction, driving the finger cylinder to move in the opposite direction, and the latch moves upward along with the mold body; The pad driving cylinder drives the pad to move to the bottom of the mold body, and the pad column is aligned with the mold body; The die-casting machine pressure head presses down the graphite heavy carbon block molding product; the graphite heavy carbon block molding product falls onto the pad after being separated from the mold body, and the pad driving cylinder drives the pad to move out.

[0013] In one embodiment, the step is also included: sucking the graphite heavy carbon block molded product by multiple vacuum suction cups of a four-axis robot arm grasping device, and rotating the four-axis robot arm grasping device. When the graphite heavy carbon block molded product is facing the stacking station, the pressure of the vacuum suction cup is released, and the graphite heavy carbon block molded product is transferred to the stacking station.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the isostatic graphite heavy carbon block forming die of the present application, the latch assembly includes a latch used in conjunction with the die body, the latch is controlled by the connected finger cylinder and the stroke cylinder, the finger cylinder is in a closed state, the latch is clamped, and the die-casting machine pressure head moves up and down to die-cast the powder to obtain a graphite heavy carbon block forming product; when demolding, the finger cylinder and the latch are released, the stroke cylinder drives the finger cylinder to retract, and the latch moves upward with the die body, at this time the pad moves to the bottom of the die body, the pad column is directly opposite to the corner below the die body, the pad column supports the die body, and the die-casting machine pressure head presses down the forming product. There is space for the force to move, and the forming product can be separated from the die body and fall on the pad, completing the demolding and unloading work. The entire device can be fully automatically operated, and has a simple structure, low operating cost and high efficiency. Especially for heavy carbon blocks, it saves time and effort, and avoids safety risks caused by manual labor too close to the working area. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the structure of an isostatic graphite heavy carbon block forming die according to one embodiment; Figure 2 The invention is a schematic structural diagram of a latch assembly of an isostatic graphite heavy carbon block forming die according to an embodiment. DETAILED DESCRIPTION

[0017] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively and meticulously below in conjunction with the accompanying drawings and preferred embodiments of the present invention, but the protection scope of the present invention is not limited to the following specific embodiments.

[0018] Unless otherwise defined, all professional terms used below have the same meanings as those generally understood by those skilled in the art. The professional terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of the present invention.

[0019] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present invention can be purchased from the market or prepared by existing methods.

[0020] See also Figure 1-2 , an isostatic graphite heavy carbon block forming die, comprising: a die body 10, a die-casting machine ram 20, a latch assembly 30 and a discharging device 40. Specifically, in one embodiment, the die body 10 forms a hollow cavity for containing graphite molding powder. The die-casting machine ram 20 is supported by a plurality of top columns 22. The die-casting machine ram 20 is located above the opening of the die body, and the graphite molding powder is die-casted by moving up and down along the top columns 22. The latch assembly 30 includes a latch 32 used in conjunction with the die body 10, a finger cylinder 34 movably connected to the latch 32, and a travel cylinder 38 that drives the latch 32 and the finger cylinder 34 to telescope together. The discharging device 40 includes a pad 42, pad columns 44 and pad driving cylinders 46 for receiving graphite heavy carbon block molded products. The pad columns 44 are arranged at intervals on the pad 42, and the pad driving cylinders 46 are arranged on both sides of the pad 42 to drive the pad 42 in and out of the bottom of the mold body 10.

[0021] During die-casting, the stroke cylinder 38 extends, and the finger cylinder 34 clamps the pin 32 when it is in a closed state. The pin 32 locks the mold body 10 and the die-casting machine ram 20. During demolding, the finger cylinder 34 releases the pin 32, and the pin 32 is separated from the finger cylinder 34. The pin 32 moves upward with the mold body 10, and the pad 42 is driven by the pad driving cylinder 46 to move to the bottom of the mold body 10. After the die-casting machine ram 20 presses out the graphite heavy carbon block molded product, the graphite heavy carbon block molded product follows the pad 42 to move and discharge, completing demolding.

[0022] The isostatic graphite heavy carbon block forming die of the present application, the latch assembly 30 includes a latch 32 used in conjunction with the die body 10, the latch 32 is controlled by the connected finger cylinder 34 and the stroke cylinder 38, the finger cylinder 34 is in a closed state, the latch 32 is clamped, and the die-casting machine pressure head 20 moves downward to die-cast the powder to obtain a graphite heavy carbon block forming product; when demolding, the finger cylinder 34 and the latch 34 are loosened, the stroke cylinder 38 drives the finger cylinder 34 to retract, and the latch 32 moves upward with the die body 10, at this time the pad 4 2 is moved to the bottom of the mold body 10, and the pad column 44 is directly opposite to the corner below the mold body 10. The pad column 44 supports the mold body 10, and the die-casting machine pressure head 20 can have a force movement space when pressing the molded product, so that the molded product can be separated from the mold body 10 and fall on the pad 42, completing the demoulding and unloading work. The whole device can realize full-automatic operation, and has a simple structure, low operating cost and high efficiency. Especially for heavy carbon blocks, it saves time and labor, and avoids safety risks caused by manual labor too close to the working area.

[0023] Specifically, in one embodiment, the latch assembly 30 further includes a support frame 31 and a guide rod 36 movably connected to the support frame 31. The latch assembly 30 includes a latch 32 used in conjunction with the mold body 10, a finger cylinder 34 connected to the latch 32, and a stroke cylinder 38 that drives the latch 32, the finger cylinder 34, and the guide rod 36 to telescope together; wherein, when the finger cylinder 34 is in a closed state, the latch 32 is clamped, the stroke cylinder 38 extends, and the latch 32 locks the mold body and the die-casting machine pressure head. When demolding, the finger cylinder 34 releases the latch 32, the latch 32 is separated from the finger cylinder 34, and the latch 32 moves upward with the mold body 10. The latch assembly 30 of the present application has a simple structure, and when used in conjunction with the mold body 10, the operation is also very simple and controllable.

[0024] Specifically, in one embodiment, the support frame 31 includes a lower base 311, an upper base 312 and a column 313, the column is fixed on the lower base 311 and the upper base 312, and there are two columns 313, which are arranged in parallel on the lower base 311 and the upper base 312. The guide rod 36 is connected to the upper base 312. Preferably, the support frame 31 is a steel component with a stable and reliable structure. Two column fixing seats 314 are provided on the lower base 311, which are respectively used to fix the two columns 313 on the lower base 311 more stably.

[0025] Preferably, in one embodiment, there are two guide rods 36, which are respectively connected to the upper base 312 through linear bearings 35. The latch assembly 30 also includes a push plate 37 disposed at one end of the finger cylinder 34 close to the stroke cylinder 38, and the two guide rods 36 and the stroke cylinder 38 are both connected to the push plate 37. The guide rods 36 and the stroke cylinder 38 are both connected to the push plate 37 and then connected to the finger cylinder 34, so that the operation of the finger cylinder 34 can be controlled more smoothly. The use of the stroke cylinder 38 drive has a simple structure and precise control.

[0026] Specifically, in one embodiment, a clamping head 322 is provided at the end of the latch 32, and the finger cylinder 34 includes a first finger 341 and a second finger 342. The first finger 341 and the second finger 342 are moved closer or farther away from each other to achieve the clamping or loosening of the clamping head 322 of the latch 32 by the finger cylinder 34. That is, when the first finger 341 and the second finger 342 are moved closer to each other, the clamping head 322 can be clamped, and the stroke cylinder 38 is extended, and the latch 32 is inserted into the insertion hole of the mold to compress the mold and the die-casting machine. When the first finger 341 and the second finger 342 are moved away from each other, the clamping head 322 is released, and the stroke cylinder 38 is retracted, and the latch 32 remains in the insertion hole of the mold and moves upward with the mold body to achieve demolding. In one embodiment, preferably, the stroke of the stroke cylinder is 300 mm and the cylinder diameter is 50 mm.

[0027] Specifically, in one embodiment, the isostatically pressed graphite heavy carbon block is square, the pad 42 is square, and there are four pad columns 44, which are respectively located at the edges of the pad. The pad 42 and the pad columns 44 are integrally formed, which is convenient for entering and exiting the bottom of the mold body 10 at the same time, simplifying the action process. In other embodiments, when the isostatically pressed graphite heavy carbon block is a cylinder, the mold body 10 is correspondingly annular, and the pad columns 44 can be other numbers. The pad columns 44 are arranged around the mold body 10 on the pad 42. Preferably, the stroke of the pad driving cylinder 46 is 1000mm and the cylinder diameter is 80mm. The pad driving cylinder 46 is used to drive the pad 42, which has a simple structure and precise control.

[0028] In one embodiment, the isostatic graphite heavy carbon block forming mold also includes an automatic powder feeder 50, and the discharge port 52 of the automatic powder feeder 50 is located above the opening of the mold body 10. In one embodiment, the isostatic graphite heavy carbon block forming mold also includes a four-axis robotic arm grasping device 60, and the four-axis robotic arm grasping device 60 can rotate 360 ​​degrees. The four-axis robotic arm grasping device 60 includes a connecting flange 62 arranged at the end of the robotic arm and a plurality of vacuum suction cups 64 fixed on the connecting flange, which are used to suck the isostatic graphite heavy carbon block molded product after discharge. In one embodiment, the mass of the graphite heavy carbon block molded product is greater than or equal to 128kg and less than or equal to 200kg. The device is particularly suitable for heavy carbon block molding, and the overall operation is simple and efficient. For the heavy carbon block molded product, a plurality of vacuum suction cups 64 can provide sufficient pressure to suck the molded product so that it will not fall during the movement.

[0029] The isostatic graphite heavy carbon block forming die also includes an electric control cabinet for electrically connecting with various components, so as to control the operation of various components.

[0030] Based on the same inventive concept, the present invention also provides a molding method using the isostatic graphite heavy carbon block molding die as described above, comprising the steps of: S10, injecting graphite molding powder into the mold body 10.

[0031] Specifically, the powder can be fed by an automatic powder feeder 50 . The discharge port 52 of the automatic powder feeder 50 faces the opening of the mold body 10 .

[0032] S20, start the stroke cylinder 38, control the finger cylinder 34 to drive the latch 32 to move toward the mold body 10, the finger cylinder 34 clamps the latch 32, and the latch 32 locks the mold body and the die-casting machine ram 20.

[0033] S30, the die-casting machine pressure head 20 moves downward to die-cast the powder to obtain a graphite heavy carbon block molding product.

[0034] Specifically, the die-casting machine ram 20 is driven by hydraulic pressure to move up and down along the path where the top column 22 is located.

[0035] S40 , the finger cylinder 34 releases the latch 32 , the stroke cylinder 38 moves in the reverse direction to drive the finger cylinder 34 to move in the reverse direction, and the latch 32 moves upward along with the mold body 10 .

[0036] Specifically, after the powder is molded, a molded product is obtained, and the demolding process begins. The finger cylinder 34 releases the latch 32, and the stroke cylinder 38 moves in the reverse direction to drive the finger cylinder 34 to move in the reverse direction, and the latch 32 moves upward along with the mold body 10.

[0037] S50 , the pad driving cylinder 46 drives the pad 42 to move to the bottom of the mold body 10 , and the pad column 44 is aligned with the mold body 10 .

[0038] After the mold body 10 moves upward, the pad 42 moves to the bottom of the mold body 10 and supports the mold body 10 through the pad column 44 to form a certain space range, so that the product has enough space to fall.

[0039] S60, the die casting machine pressure head 20 presses down the graphite heavy carbon block forming product; the graphite heavy carbon block forming product falls onto the pad 42 after leaving the die body 10, and the pad driving cylinder 46 drives the pad 42 to move out. At this time, the product leaves the bottom of the die body 10 together with the pad 42.

[0040] In one embodiment, the step is also included: S70, the graphite heavy carbon block molded product is sucked by multiple vacuum suction cups 64 of the four-axis robot arm grasping device 60, and the four-axis robot arm grasping device 64 is rotated. When the graphite heavy carbon block molded product is facing the stacking station, the pressure of the vacuum suction cup 64 is released, and the graphite heavy carbon block molded product is transferred to the stacking station.

[0041] According to the molding method of the graphite heavy carbon block molding product, the entire molding process from feeding to product molding and discharging is fully automatic. This has important industrial production value for the production of heavy carbon blocks, greatly reducing labor costs and the risk of inhaling dust. Furthermore, the entire operation is simple, low-cost and highly efficient.

Claims

1. An isostatic graphite heavy carbon block forming die, characterized in that: include: Mold body; The die-casting machine ram is supported by a plurality of top columns and is located above the opening of the die body; A latch assembly, comprising a latch used in conjunction with the mold body, a finger cylinder movably connected to the latch, and a travel cylinder driving the latch and the finger cylinder to move telescopically together; The discharging device includes a pad, pad columns and pad driving cylinders for receiving graphite heavy carbon block molding products, the pad columns are arranged on the pad at intervals, and the pad driving cylinders are arranged on both sides of the pad to drive the pad in and out of the bottom of the mold body; During die-casting, the stroke cylinder extends and the finger cylinder is in a closed state to clamp the pin, which locks the mold body and the die-casting machine pressure head. During demoulding, the finger cylinder releases the pin, and the pin is separated from the finger cylinder. The pin moves upward with the mold body, and the pad is driven by the pad drive cylinder to move to the bottom of the mold body. After the die-casting machine pressure head presses out the graphite heavy carbon block molded product, the graphite heavy carbon block molded product follows the pad to move for discharge.

2. The isostatic graphite heavy carbon block forming die according to claim 1, characterized in that: The finger cylinder comprises a first finger and a second finger, and a clamping head is provided at the end of the latch. The first finger and the second finger move closer to or farther from each other to achieve the clamping or release of the clamping head of the latch by the finger cylinder.

3. The isostatic graphite heavy carbon block forming die according to claim 1, characterized in that: The latch assembly also includes a support frame and a guide rod. The support frame includes a lower base and an upper base, two parallel columns fixed on the lower base and the upper base, and the guide rod is connected to the upper base.

4. The isostatic graphite heavy carbon block forming die according to claim 3, characterized in that: There are two guide rods, which are respectively connected to the upper base through linear bearings; the latch assembly includes a push plate arranged at one end of the finger cylinder close to the stroke cylinder, and the two guide rods and the stroke cylinder are connected to the push plate.

5. The isostatic graphite heavy carbon block forming die according to claim 1, characterized in that: There are four pad columns, and the pad and the pad columns are integrally formed.

6. The isostatic graphite heavy carbon block forming die according to claim 1, characterized in that: It also includes a four-axis robot arm grasping device, which includes a connecting flange arranged at the end of the robot arm and a plurality of vacuum suction cups fixed on the connecting flange, and is used to suck the isostatically pressed graphite heavy carbon block molded products after discharge.

7. The isostatic graphite heavy carbon block forming die according to claim 1, characterized in that: It also includes an automatic powder feeder, and the discharge port of the automatic powder feeder is located above the opening of the mold body.

8. The isostatic graphite heavy carbon block forming die according to claim 1, characterized in that: The mass of the graphite heavy carbon block molded product is greater than or equal to 128 kg and less than or equal to 200 kg.

9. A molding method using the isostatic graphite heavy carbon block molding die according to any one of claims 1 to 8, characterized in that: Includes steps: Injecting graphite molding powder into the mold body; Start the stroke cylinder, control the finger cylinder to drive the latch to move toward the mold body, the finger cylinder clamps the latch, and the latch locks the mold body and the die-casting machine pressure head; The die-casting machine's pressure head moves up and down to die-cast the powder to obtain a graphite heavy carbon block molding product; The finger cylinder releases the latch, and the stroke cylinder moves in the opposite direction, driving the finger cylinder to move in the opposite direction, and the latch moves upward along with the mold body; The pad driving cylinder drives the pad to move to the bottom of the mold body, and the pad column is aligned with the mold body; The die-casting machine pressure head presses down the graphite heavy carbon block molding product; the graphite heavy carbon block molding product falls onto the pad after being separated from the mold body, and the pad driving cylinder drives the pad to move out.

10. The molding method according to claim 9, characterized in that: The method also includes the following steps: sucking the graphite heavy carbon block molded product by multiple vacuum suction cups of a four-axis robot arm grasping device, and rotating the four-axis robot arm grasping device. When the graphite heavy carbon block molded product is facing the stacking station, the pressure of the vacuum suction cup is released, and the graphite heavy carbon block molded product is transferred to the stacking station.

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