Cold pressing equipment for producing diamond saw blade tool bit

Abstract

The invention discloses cold pressing equipment for producing a diamond saw blade tool bit, and relates to the technical field of saw blade manufacturing, the cold pressing equipment comprises a rack, a mold with a mold cavity and a feeding part for feeding materials into the mold cavity of the mold, the feeding part comprises a feeding tank and a material supply part, the feeding tank is provided with a tangential feeding port allowing mixed powder to enter and a bottom discharging port communicated with the mold cavity, an exhaust port is further formed in the upper portion of the tank body, and the feeding part is installed on the rack and used for feeding the mixed powder into the feeding port. A mixing and exhausting assembly used for evenly mixing powder in the cavity and exhausting gas in the cavity is arranged in the feeding pipe, and a driving assembly used for driving the feeding tank to move horizontally is further arranged on the machine body. The method has the effect of solving the problems of powder segregation and air back pressure.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of saw blade manufacturing, in particular to a cold pressing equipment for producing a diamond saw blade bit. BACKGROUND

[0002] The diamond saw blade bit is a core component made of a mixture of diamond abrasive and metal matrix powder (such as copper, iron, cobalt-based, etc.) through cold pressing forming and then hot pressing sintering. In the cold pressing forming process, the quality of the feeding link is crucial, which is responsible for filling the quantitatively and uniformly mixed powder into the mold cavity, and directly determines the density uniformity, organization consistency and use performance of the final bit product.

[0003] The mainstream process for producing diamond bits generally includes mixing, cold pressing forming, hot pressing sintering and other processes. Among them, the cold pressing forming is to press the mixture of diamond abrasive and metal matrix powder (such as copper, iron, cobalt-based, etc.). Currently, the commonly used diamond bit cold pressing equipment in the industry mainly works as follows: through an automatic mechanical, electrical and hydraulic system, the feeding, pressing and demolding cycle process is completed. Specifically, the equipment usually includes a rack, a hydraulic system, a mold device and a control system. When working, the mixed powder is accurately filled into the mold cavity by the feeding system; then the hydraulic system drives the upper punch (or simultaneously drives the upper and lower punches) to apply a huge pressure to the powder in the cavity, so that the loose powder is compacted into a shape; after a certain pressure maintaining time, the punch retreats, and the pressed bit green body is ejected from the mold through the demolding component, completing a working cycle.

[0004] The feeding component of the prior art cold pressing equipment usually adopts a reciprocating feeding shoe structure. However, in the production of high-performance diamond saw blade bits, this traditional feeding method faces a series of severe challenges. First, there is a significant density difference between diamond and metal matrix powder (the density of metal is much greater than that of diamond), which is prone to segregation phenomenon in the vibration and movement of the feeding process, resulting in uneven distribution of diamond particles, which seriously affects the sharpness and service life of the saw blade. Secondly, in order to improve the production efficiency and speed up the feeding speed, the rapidly falling powder will compress the air in the cavity, forming a strong air counter pressure, which hinders the full filling of the powder. Especially when filling deep cavity or complex shape mold, it is easy to cause defects in the green body. SUMMARY

[0005] The purpose of the present application is to provide a cold pressing equipment for producing a diamond saw blade bit, which can solve the problems of powder segregation and air counter pressure.

[0006] The cold pressing equipment for producing a diamond saw blade bit provided by the present application adopts the following technical scheme: The application relates to a feeding device for a moulding machine, which comprises a frame, a mould with a cavity and a feeding component for feeding material into the cavity of the mould, wherein the feeding component comprises a feeding tank and a feeding member, the feeding tank is provided with a tangential feeding port for feeding mixed powder and a bottom discharging port communicated with the cavity of the mould, an exhaust port is further arranged above the tank body, the feeding member is installed on the frame and is used for adding mixed powder into the feeding port, a mixing and exhaust assembly for uniformly mixing powder in the cavity and discharging gas in the cavity is arranged in the feeding pipe, and a driving assembly for driving the feeding tank to move horizontally is further arranged on the frame.

[0007] Optionally, the mixing and exhaust assembly comprises a fan blade and a driving member, the fan blade is coaxially and rotatably arranged on the inner wall of the feeding tank, the driving member is installed on the feeding pipe, and the driving member is used for driving the fan blade to rotate so as to drive gas in the tank body to flow.

[0008] Optionally, a separation membrane allowing gas to pass through but not allowing solid particles to pass through is further arranged in the feeding tank, the separation membrane divides the space in the feeding tank into a first region and a second region according to vertical space, the fan blade is located in the first region, and the feeding port is located in the second region.

[0009] Optionally, an ultrasonic generator is arranged in the first region, and an output end of the ultrasonic generator faces the filter membrane.

[0010] Optionally, a gas supply assembly is further arranged on the frame, the gas supply assembly is communicated with the feeding tank, and the gas supply assembly is used for adding different gases into the feeding tank.

[0011] Optionally, a sealing member is further arranged on the inner wall of the feeding tank, and the sealing member is used for keeping the feeding tank and the cavity of the mould in sealed communication.

[0012] Optionally, the sealing member is a rubber tube, one end of the rubber tube is sealingly connected with the outer wall of the feeding tank, when material is added into the cavity, the other end of the rubber tube abuts against the end face of the mould, and the opening of the cavity is located in the rubber tube.

[0013] Optionally, the sealing member and the feeding tank are detachably connected.

[0014] In conclusion, the application has at least one beneficial technical effect as follows: 1. When adding material, first make the discharge port on the feeding tank in sealed communication with the cavity by driving assembly and sealing, then start the driving part to drive the fan blade to rotate, the rotation of the fan blade evacuates most of the gas in the feeding tank and the cavity, then start the feeding part to add material in the feeding tank, when the material enters the feed port, part of the air will enter the feeding tank, and at this time the feeding tank can be regarded as a cyclone separation tank under the action of the fan blade, when the material and air enter the tank, the material with higher density is located at the inner wall of the feeding tank, and the air with lower density is located in the middle of the feeding tank, under the action of gravity, the material with higher density moves downward to the discharge port, and the gas with lower density moves upward to the exhaust port, thereby realizing the separation of gas and material, at this time there is a small amount of gas or even no gas in the cavity, so the material will directly fall into the cavity under the action of gravity, thereby avoiding the air back pressure, and the material can be relatively densely filled in the cavity, and when extruding subsequently, the air gap in the molded object is reduced due to the small amount of gas contained in the material and the dense material, thereby greatly improving the production quality of the object; in addition, when the material is separated in the feeding tank, the material will collide and rub with each other under the action of centrifugal force and airflow, so that the agglomerates in the material are broken, and the different material solid particles in the material are also mixed more uniformly under the action of centrifugal force and airflow, thereby making the material falling into the cavity relatively uniform, thereby further improving the production quality of the product; 2. The setting of the separation membrane not only protects the fan blade from being abraded by the material, but also avoids part of the material being discharged from the exhaust port with the airflow, thereby greatly reducing the waste of the material; 3. The setting of the ultrasonic generator can make the separation membrane vibrate, so that the powder particles adhered to the separation membrane can be shaken off, on the one hand, the effect of cleaning the separation membrane is achieved, on the other hand, the separation membrane can be prevented from being blocked by the powder particles, the powder particles shaken off by the ultrasonic generator can also fall into the cavity, thereby further reducing the waste of the material; in addition, if a small amount of gas remains in the feeding tank and the cavity, the ultrasonic waves emitted by the ultrasonic generator can also vibrate the material accumulated in the cavity to a certain extent, thereby further reducing the air gap between the materials; 4. When it is necessary to clean the inside of the cavity and the feeding tank, the separation membrane only needs to be disassembled, then the gas supply assembly injects gas into the feeding tank, and the rotation speed of the fan blade is increased, the gas will move wildly in the feeding tank and the cavity, thereby blowing off the material adhered between the inner wall of the feeding tank and the cavity, then due to the increase of the rotation speed of the fan blade, the fan blade will exert a strong suction force on the feeding tank and the cavity, the strong suction force will suck the gas and part of the material residues to the outside of the feeding tank, thereby achieving the purpose of cleaning the inside of the feeding tank and the cavity. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 is Figure 1 is a partial enlarged schematic diagram of part A in Figure 3 is Figure 1 is a partial enlarged schematic diagram of part B in Figure 4 is a schematic diagram of the overall structure of a charging tank in an embodiment of the present application; Figure 5 is Figure 4 is a partial enlarged schematic diagram of part C in In the figure, 1 is a frame; 2 is a mold; 21 is a punch; 22 is a lower mold base; 23 is a cavity; 3 is a charging component; 31 is a charging tank; 311 is a feeding port; 312 is a discharging port; 313 is an exhaust port; 314 is a first area; 315 is a second area; 32 is a feeding component; 321 is a storage tank; 322 is a feeding pipe; 3221 is a hose; 3222 is a metal pipe; 323 is a sliding block; 324 is a connecting column; 33 is a rubber tube; 4 is a driving assembly; 5 is a mixed exhaust assembly; 51 is a fan blade; 52 is a driving component; 53 is a separation membrane; 6 is an ultrasonic generator; 7 is a gas supply assembly; 71 is a gas supply pipe; 72 is a gas supply tank; 73 is a pump; 8 is a pressure sensor. DETAILED DESCRIPTION

[0016] The following will be described in detail in combination with the accompanying Figures 1-5 The present application will be described in further detail.

[0017] A cold pressing device for producing a diamond saw blade bit, with reference to Figure 1 , comprising a frame 1, a mold 2 with a cavity 23, and a charging component 3 for charging the mold 2 cavity 23.

[0018] The mold 2 in the embodiment includes a punch 21 and a lower die seat 22. The upper punch is arranged on the rack 1 and slides in the vertical direction. The rack 1 is provided with a hydraulic device for driving the punch 21 to move. The lower die seat 22 is fixedly installed on the rack 1 and is below the punch 21. An upper end surface of the lower die seat 22 is provided with a cavity 23 for placing the powder material. After the feeding component 3 adds a certain amount of powder material into the cavity 23, the hydraulic device drives the punch 21 to move downward, the punch 21 extends into the cavity 23, and the powder material in the cavity 23 is pressed into a specific-shaped object. The rack 1 is further provided with an ejection component (not shown in the figure) for ejecting the molded object in the cavity 23. After the object is molded, the hydraulic device drives the punch 21 to move back, and then the ejection component ejects the object in the cavity 23. Then, the staff or the mechanical arm takes away the molded object, and the above steps are repeated to complete the continuous production of the saw blade head. This is the prior art and will not be described in detail here.

[0019] Referring to Figures 1-5 The feeding component 3 in the embodiment includes a feeding tank 31 and a feeding member 32.

[0020] The feeding member 32 includes a storage tank 321 and a feeding pipe 322. The storage tank 321 is fixedly installed on the rack 1. One end of the feeding pipe 322 is communicated with the bottom of the storage tank 321. The part where the feeding pipe 322 is communicated with the storage tank is provided with an electromagnetic valve. The rack 1 is further provided with a sliding block 323. One side of the rack 1 is further provided with a driving assembly 4 for driving the sliding block 323 to move laterally. The driving assembly 4 in the embodiment is an electric push rod. The feeding tank 31 is fixedly arranged on one side of the sliding block 323 through a connecting column 324. The bottom of the feeding tank 31 in the embodiment is conical. A tangential feeding port 311 is formed on the sidewall of the feeding tank 31. A discharging port 312 is arranged on the bottom of the feeding tank 31. An exhaust port 313 is arranged on the upper end surface of the feeding tank 31. The bottom of the feeding tank 31 is in abutting relationship with the upper end surface of the lower die seat 22. The feeding tank 31 in the embodiment is arranged in the vertical direction. One end of the feeding pipe 322 away from the storage tank 321 is communicated with the feeding port 311 on the feeding tank 31. The part of the feeding pipe 322 close to the feeding tank 31 is a hard metal pipe 3222. A screw rod (not shown in the figure) for conveying the powder material is arranged in the metal pipe 3222. One end of the metal pipe 3222 is provided with a motor for driving the screw rod to rotate. The other part of the feeding pipe 322 is a flexible pipe 3221.

[0021] The inside of the feeding tank 31 is further provided with a mixing and exhaust assembly 5 for mixing the powder in the cavity 23 uniformly and exhausting the gas in the cavity 23. The mixing and exhaust assembly 5 in the embodiment includes a fan blade 51 and a driving member 52.

[0022] The fan blade 51 is located inside the feeding tank 31, and the fan blade 51 is coaxially fixedly installed on the inner wall of the feeding tank 31. The driving member 52 in the embodiment is provided with a rotating motor, the rotating motor is installed on the upper end surface of the feeding tank 31, the output shaft of the rotating motor extends into the inside of the feeding tank 31, and the output shaft of the rotating motor is coaxially fixedly connected with the fan blade 51. In the embodiment, the deflection angle of the fan blade 51 is specially designed. When the fan blade 51 rotates, the fan blade 51 can drive the gas in the feeding tank 31 to spiral upwards around the axis of the feeding tank 31.

[0023] When it is needed to produce a saw blade object, the electric push rod is started, the electric push rod drives the sliding block 323 to move, thereby driving the feeding tank 31 to move, until the feeding tank 31 is in a state that the discharge port 312 at the lower end of the feeding tank 31 is in communication with the mold cavity 23 on the lower mold seat 22, and the discharge port 312 of the feeding tank 31 completely covers the opening of the mold cavity 23, then the driving member 52 is started, the fan blade 51 rotates, the rotation of the fan blade 51 removes most of the gas in the feeding tank 31 and the mold cavity 23, at this time, the feeding tank 31 and the mold cavity 23 are in a relative negative pressure state, therefore, the feeding tank 31 can be better adsorbed on the upper end surface of the lower mold seat 22, and the sealing between the feeding tank 31 and the mold cavity 23 is further strengthened, then the electromagnetic valve on the feeding pipe 322 is opened and the motor connected with the screw is started, then part of the powder material and gas in the feeding pipe 322 enters the feeding tank 31 from the feeding port 311 on the feeding tank 31, after the quantitative material is added, the motor driving the screw to rotate is turned off, due to the special design of the feeding tank 31 in the embodiment and the effect of the fan blade 51, the feeding tank 31 in the embodiment can be regarded as a cyclone separation tank, that is, when the powder material and gas enter the feeding tank 31 from the feeding port 311, the powder material and gas are subjected to centrifugal force due to the gas flow in the feeding tank 31, because the density of the powder material is greater than that of the gas, the powder material is gathered at the inner wall of the feeding tank 31 under the action of the centrifugal force, and the gas is gathered at the center of the feeding tank 31, at the same time, due to the large density of the powder material, the powder material moves in a downward spiral trajectory under the action of gravity and centrifugal force, until the powder material is discharged from the discharge port 312, and the gas in the feeding tank 31 is lighter in density, and therefore floats upwards all the time, until the gas is discharged from the exhaust port 313 on the feeding tank 31, when the material is completely and stably dropped into the mold cavity 23, the driving member 52 stops driving the fan blade 51 to rotate, then the electric push rod moves back, thereby driving the sliding block 323 and the feeding tank 31 to move back, until the feeding tank 31 moves away from above the mold cavity 23, then the hydraulic device is started, thereby driving the punch 21 to move downwards, the punch 21 is inserted into the mold cavity 23 and applies pressure to the powder material in the mold cavity 23, after the powder material is pressed into a specific shape object, the hydraulic device drives the punch 21 to move back, the demolding component is started to eject the object in the mold cavity 23 out of the mold cavity 23, then the worker or the mechanical arm takes away the formed object, and then the above steps are repeated.

[0024] In the prior art, the powder material is usually directly input into the cavity 23 through a pipeline. However, due to the different materials of the particles in the powder material, the flow rates of the particles of different materials are different. Therefore, when the powder material flows into the cavity 23, the particles of the material with a fast flow rate will be accumulated first, and then the particles of the material with a slow flow rate will be accumulated later. Finally, the materials of different materials in the cavity 23 will be gathered into groups, which will greatly reduce the quality of the saw blade finally produced. In the embodiment, when the powder material enters the feeding tank 31 from the feeding port 311, the powder material will move downward in a spiral trajectory under the action of the fan blade 51. However, due to the different shapes and sizes of the particles in the powder material, the relative collision and friction between the particles in the powder will occur. Since the movement between the single particles in the powder is disordered, that is, the materials of different materials will not be gathered, so that the particles of various materials in the powder material can be relatively uniformly distributed in the cavity 23. In addition, since the relative collision between the particles in the powder material will occur, the agglomerates in the powder material can be broken, which further increases the uniformity of the particles of various materials in the powder material in the cavity 23, and thus improves the production quality of the saw blade.

[0025] In addition, since only part of the air is left in the cavity 23 and the feeding tank 31 before the material enters the feeding tank 31, and the gas in the feeding tank 31 and the cavity 23 will be further reduced or even no air under the separation action of the fan blade 51 and the feeding tank 31, the powder material will directly fall into the cavity 23 under the action of gravity, so that the air counterpressure will not occur. The material can be relatively densely filled in the cavity 23. At the same time, during subsequent extrusion, since the material contains less gas and the material is dense, the voids in the object extruded and formed are reduced, which greatly improves the production quality of the object. It should be noted that part of the gas needs to be left in the feeding pipe before the material enters the feeding tank 31, so as to ensure that the material and the gas in the feeding pipe can move spirally when entering. Therefore, the feeding tank 31 is further provided with a pressure sensor 8 inside to ensure that a certain amount of gas is left in the feeding tank 31.

[0026] The feeding tank 31 in the embodiment is further provided with a separation film 53 for protecting the fan blade 51.

[0027] In this embodiment, the separator 53 is circular and coaxially arranged inside the feeding tank 31. The separator 53 divides the internal space of the feeding tank 31 into a first region 314 and a second region 315 vertically. The fan blade 51 is located in the first region 314, and the feed inlet 311 is located in the second region 315. In this embodiment, the separator 53 is made of sintered stainless steel, which has excellent corrosion resistance, strength, toughness and wear resistance. Of course, in other optional embodiments, other materials with the same properties can also be selected. In addition, the feeding tank 31 in this embodiment is composed of two parts spliced ​​together in the vertical direction. The two parts are detachably connected by screws. When it is necessary to replace the separator membrane 53, the screws on the feeding tank 31 are removed, the separator membrane 53 in the upper part of the feeding tank 31 is removed, a new separator membrane 53 is reinstalled, and finally the upper part of the feeding tank 31 is spliced ​​together again by screws. This method facilitates the replacement of various parts inside the feeding tank 31. It should be noted that the separator membrane 53 in this embodiment is also installed inside the feeding tank 31 by snap-fit ​​to facilitate the replacement of the separator membrane 53.

[0028] When the powder material enters the feeding tank 31, it cannot enter the first region 314 due to the obstruction of the separator 53. Therefore, the powder material is unlikely to cause wear on the fan blade 51. In addition, electronic components such as the pressure sensor 8 can also be installed in the first region 314 to protect them. At the same time, the separator 53 in this embodiment can also prevent a small amount of light powder particles from being discharged from the exhaust port 313 with the gas, thus avoiding material waste.

[0029] Furthermore, an ultrasonic generator 6 is also provided in the first region 314 of this embodiment. The ultrasonic generator 6 in this embodiment is specifically a piezoelectric ceramic transducer, which can be installed on the upper inner wall of the feeding tank 31 in a small size. In this embodiment, there are two ultrasonic generators 6, both of which are installed on the upper inner wall of the feeding tank 31 and are arranged opposite to each other.

[0030] During the flow of powdered materials, some powder particles inevitably adhere to the separator membrane 53. These powder particles cannot be used, leading to waste of powdered materials. Therefore, before adding powdered materials to the feeding tank 31, the ultrasonic generator 6 can be activated to vibrate the separator membrane 53, shaking off the powder particles adhering to it. This achieves the effect of cleaning the separator membrane 53 and prevents it from being blocked by powder particles. The ultrasonic generator 6 shakes off the powder particles from the separator membrane 53, and the shaken-off powder particles can also fall into the cavity 23, further reducing material waste. In addition, if a small amount of gas remains in the feeding tank 31 and the cavity 23, the ultrasonic waves emitted by the ultrasonic generator 6 can also compact the material accumulated in the cavity 23 to a certain extent, further reducing the gaps between materials and thus further improving the production quality of the product.

[0031] In this embodiment, the frame 1 is also provided with an air supply assembly 7, which includes an air supply pipe 71, an air supply tank 72 and a pump 73.

[0032] In this embodiment, the gas supply pipe 71 is also configured as a flexible hose 3221. One end of the gas supply pipe 71 is connected to the top of the feeding tank 31, and a solenoid valve is provided at the connection between the gas supply pipe 71 and the feeding tank 31. The end of the gas supply pipe 71 away from the feeding tank 31 is connected to multiple auxiliary pipes. In this embodiment, multiple gas supply tanks 72 are also provided, and multiple auxiliary pipes correspond one-to-one with multiple auxiliary pipes. The end of the auxiliary pipe away from the gas supply pipe 71 is connected to the gas supply tank 72. A solenoid valve is also provided at the connection between the gas supply tank 72 and the auxiliary pipes. A pump 73 is also connected to the gas supply pipe 71 so that the pump 73 can send the gas in the gas supply tank 72 into the feeding tank 31. In this embodiment, the gas stored in different gas supply tanks 72 is different.

[0033] When a batch of items is completed, i.e. when the equipment is shut down, simply remove the separator membrane 53, open the solenoid valve on the gas supply tank 72 and one of the auxiliary pipes, start the pump 73, and gas will be injected into the feeding tank 31. At this time, the rotation speed of the fan blade 51 is increased by the control center, and the gas will circulate wildly in the feeding tank 31 and the cavity 23, thereby blowing off the material adhering to the inside of the feeding tank 31 and the inner wall of the cavity 23. Then, due to the increased rotation speed of the fan blade 51, the fan blade 51 will exert a strong suction force on the feeding tank 31 and the cavity 23. This strong suction force will draw the gas and some material residue to the outside of the feeding tank 31, thereby achieving the purpose of cleaning the inside of the feeding tank 31 and the cavity 23. The material residue discharged from the exhaust port 313 can be recovered through an external collection device.

[0034] It should be noted that the air supply component 7 in this embodiment can also inject air into the feeding tank 31 before the fan blade 51 is started. This replaces the air in the feeding tank 31 and the cavity 23. Then the fan blade 51 starts, and the fan blade 51 draws away most of the gas in the feeding tank 31 and the cavity 23. The remaining gas in the cavity 23 is a relatively inert gas that will not react with the powder material. Therefore, even if the powder particles collide violently in the feeding tank 31, it is difficult for a chemical reaction to occur, so that the powder material can still maintain a good state. Therefore, when pressing powder materials of different materials, different gases can be injected to ensure the chemical stability of the powder material. In addition, the electric push rod, solenoid valve, pressure sensor 8, ultrasonic generator 6, motor and hydraulic device in this embodiment are all electrically connected to the control center of this equipment. The control center in this embodiment is a PLC.

[0035] Finally, in this embodiment, a sealing element is also provided on the inner wall of the feeding tank 31. In this embodiment, the sealing element is a rubber tube 33. One end of the rubber tube 33 is sealed to the outer wall of the feeding tank 31. When material is added to the cavity 23, the other end of the rubber tube 33 abuts against the end face of the mold 2, and the opening of the cavity 23 is located inside the rubber tube 33. In this embodiment, the bottom of the rubber tube 33 is slightly lower than the bottom of the feeding tank 31. Therefore, during the process of the sliding block 323 driving the feeding tank 31 to move, it is the rubber tube 33 that slides against the lower mold base 22, while the feeding tank 31... The bottom does not need to have rigid friction with the upper surface of the lower mold base 22, thereby reducing the probability of wear on the feeding tank 31 and the lower mold base 22 and improving their service life. In addition, the rubber tube 33 and the outer wall of the feeding tank 31 in this embodiment can be bonded together with glue, so it is relatively convenient to replace the rubber tube 33. Since different sizes of saw blades require different lower mold bases 22, and the size of the cavity 23 on the lower mold base 22 is also different, a rubber tube 33 of the corresponding size is required to completely cover the upper opening of the cavity 23.

[0036] The working principle of a cold pressing device for producing diamond saw blade heads in this embodiment is as follows: When an object needs to be produced, the punch 21 is at its highest point, and the feeding tank 31 is not located at the upper end of the cavity 23. Then, the electric push rod is activated, which drives the sliding block 323 to move. The sliding block 323 drives the feeding tank 31 to move until the feeding tank 31 moves above the cavity 23, and the rubber tube 33 on the feeding tank 31 completely covers the opening above the cavity 23. The solenoid valves on the air supply pipe 71 and the auxiliary pipe are opened, and the pump 73 on the air supply pipe 71 is activated, supplying gas from the air tank 72. The gas enters the feeding tank 31 and the mold cavity 23. Simultaneously, the rotating motor is started, driving the fan blade 51 to rotate. The fan blade 51 extracts the gas from the feeding tank 31 and the mold cavity 23, thus replacing the gas in these two areas. Then, the gas supply pipe 71, the solenoid valve on the auxiliary pipe, and the pump 73 are closed. When the pressure sensor 8 detects that the gas pressure in the feeding tank 31 and the mold cavity 23 has dropped to a certain value, the solenoid valve on the conveying pipe 322 is opened, and the motor on the screw is started. Then, some of the material and gas in the conveying pipe 322 enters the feeding tank 31, and the solenoid valve on the conveying pipe 322 is closed. The material and gas entering the feeding tank 31 are separated by the motor on the screw. The powder material moves downward in a spiral motion, while the gas moves upward in a spiral motion. Finally, the gas is discharged from the exhaust port 313 on the feeding tank 31, and the powder material enters the mold cavity 23 from the discharge port 312 of the feeding tank 31. The particles in the powder material undergo relatively disordered movement within the feeding tank 31, so each particle in the powder material can be relatively evenly distributed inside the mold cavity 23. At the same time, when the powder material enters the mold cavity 23, because there is little or no gas in the mold cavity 23, the powder material... When the material enters the cavity 23, there is no back pressure of gas, and there is little or no gas in the powder material in the cavity 23. Therefore, there are fewer gaps in the powder material accumulated in the cavity 23, resulting in a relatively high quality of the produced object. After all the material has fallen into the cavity 23, the rotating motor stops running, and the electric push rod drives the sliding block 323 to move back, so that the feeding tank 31 also moves back to the initial position. The rubber tube 33 is no longer located above the cavity 23. Then the hydraulic device is activated, driving the punch to move down until the punch 21 is inserted into the cavity 23, extruding the powder material in the cavity 23 into an object.

[0037] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A cold pressing device for producing diamond saw blade heads, comprising a frame (1), a mold (2) with a cavity (23), and a feeding component (3) for feeding material into the cavity (23) of the mold (2), characterized in that, The feeding component (3) includes a feeding tank (31) and a feeding component (32). The feeding tank (31) is provided with a tangential feed port (311) for the mixed powder to enter and a bottom discharge port (312) communicating with the cavity (23) of the mold (2). An exhaust port (313) is also provided above the tank. The feeding component (32) is mounted on the frame (1) and is used to add mixed powder to the feed port (311). The feeding pipe is provided with a mixing exhaust component (5) for uniformly mixing the powder in the cavity (23) and discharging the gas inside the cavity (23). The machine body is also provided with a drive component (4) for driving the feeding tank (31) to move horizontally.

2. The cold pressing equipment for producing diamond saw blade heads according to claim 1, characterized in that, The mixed exhaust assembly (5) includes a fan blade (51) and a drive member (52). The fan blade (51) is coaxially rotatably mounted on the inner wall of the feeding tank (31). The drive member (52) is mounted on the feeding pipe and is used to drive the fan blade (51) to rotate so as to drive the gas inside the feeding tank (31) to flow.

3. A cold pressing device for producing diamond saw blade heads according to claim 2, characterized in that, The feed tank (31) is also provided with a separator (53) that allows gas to pass through but does not allow solid particles to pass through. The separator (53) divides the internal space of the feed tank (31) into a first region (314) and a second region (315) in a vertical space. The fan blade (51) is located in the first region (314), and the feed inlet (311) is located in the second region (315).

4. A cold pressing device for producing diamond saw blade heads according to claim 3, characterized in that, An ultrasonic generator (6) is provided in the first region (314), and the output end of the ultrasonic generator (6) is facing the separator (53).

5. A cold pressing device for producing diamond saw blade heads according to claim 1, characterized in that, The frame (1) is also provided with an air supply component (7), which is connected to the feeding tank (31). The air supply component (7) is used to add different gases into the feeding tank (31).

6. A cold pressing device for producing diamond saw blade heads according to claim 1, characterized in that, The inner wall of the feeding tank (31) is also provided with a sealing element, which is used to keep the feeding tank (31) and the cavity (23) on the mold (2) in a sealed communication state.

7. A cold pressing device for producing diamond saw blade heads according to claim 6, characterized in that, The sealing element is a rubber tube (33). One end of the rubber tube (33) is sealed to the outer wall of the feeding tank (31). When material is added to the cavity (23), the other end of the rubber tube (33) abuts against the end face of the mold (2), and the opening of the cavity (23) is located inside the rubber tube (33).

8. A cold pressing device for producing diamond saw blade heads according to claim 1, characterized in that, The seal is detachably connected to the feeding tank (31).

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