Compensator and powder molding press

Abstract

The utility model relates to the technical field of powder pressing, and discloses a compensator and a powder forming press, and the compensator is characterized in that a plurality of working cavities are formed in a cylinder body; the multiple pressing rods correspond to the multiple working cavities in a one-to-one mode, the pressing rods are arranged in the working cavities in a sliding mode and divide the working cavities into back pressure cavities and ventilation cavities, the multiple back pressure cavities communicate with one another, the multiple ventilation cavities communicate with one another, and the ventilation cavities communicate with the external environment; the pressure control assembly communicates with the back pressure cavity and is suitable for providing pressure for the back pressure cavity. According to the utility model, the backpressure cavities are communicated with one another, so that the backpressure borne by each pressing rod is the same, the pressing force of each pressing rod on powder is the same, and the pressed powder forms an equal-density block body; and the ventilation cavity is communicated with the external environment, so that the situation that the pressing rod slides and the powder pressing quality is influenced due to negative pressure (or positive pressure) generated by the ventilation cavity when the pressing rod floats upwards (or downwards) is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of powder pressing, in particular to a compensator and a powder forming press. Background Art

[0002] In the nuclear industry, pharmaceuticals, food and other fields, powders often need to be pressed into blocks to facilitate the operation of the next process. When pressing powders, powder molding presses are often used. Existing molding presses include multi-station presses, which produce multiple products through one pressing. However, when the powder fillers are not equal, the density of the products produced by the multi-station press is slightly different. Utility Model Content

[0003] In view of this, the utility model provides a compensator and a powder forming press to solve the problem of slightly different product densities when the powder fillers are unequal.

[0004] In the first aspect, the utility model provides a compensator, comprising: a cylinder body, a working chamber is formed inside, and a plurality of the working chambers are provided; a plurality of pressure rods are provided, and the plurality of pressure rods are arranged in a one-to-one correspondence with the plurality of working chambers, and the pressure rods can be slidably arranged in the working chamber, and divide the working chamber into a back pressure chamber and a ventilation chamber, the plurality of the back pressure chambers are connected to each other, the plurality of the ventilation chambers are connected to each other, and the ventilation chamber is connected to the external environment; a pressure control component is connected to the back pressure chamber and is suitable for providing pressure to the back pressure chamber.

[0005] Beneficial effect: By connecting the back pressure chambers to each other, the back pressure on each pressing rod is the same, so as to ensure that the pressing force of each pressing rod on the powder is the same, and the pressed powder forms a block of equal density; the ventilation chamber is connected to the external environment to prevent the ventilation chamber from generating negative pressure (or positive pressure) when the pressure rod floats upward (or downward), affecting the sliding of the pressure rod and affecting the quality of powder pressing.

[0006] In an optional embodiment, the back pressure chamber contains liquid, the pressure control assembly includes a booster and a pressure supply structure, the booster forms a cavity, the booster includes a piston portion, the piston portion is slidably disposed in the cavity, and the cavity is divided into a first pressure chamber and a second pressure chamber, the first pressure chamber contains liquid, the first pressure chamber is connected to the back pressure chamber, and the second pressure chamber is connected to the pressure supply structure.

[0007] Beneficial effect: The delivery pressure of the pressure supply structure can be adjusted to achieve pressure adjustment of the second pressure chamber. The pressure of the second pressure chamber is transmitted to the first pressure chamber through the piston part, thereby achieving pressure adjustment of the back pressure chamber.

[0008] In an optional implementation, a cavity cross-sectional area of ​​the second pressure chamber is greater than a cavity cross-sectional area of ​​the first pressure chamber.

[0009] Beneficial effect: The cavity cross-sectional area of ​​the second pressure chamber is greater than the cavity cross-sectional area of ​​the first pressure chamber, and a pressurization effect proportional to the cavity cross-sectional area is obtained, thereby increasing the pressure provided by the pressure supply structure.

[0010] In an optional embodiment, the supercharger also includes a main body, which is arranged on the cylinder body and forms the cavity. The pressure supply structure includes a spring, which is arranged in the second pressure chamber, one end of the spring is connected to the piston part, and the other end of the spring is connected to the main body.

[0011] Beneficial effect: By adjusting the compression force of the spring, the pressure provided by the spring to the piston part is adjusted, thereby adjusting the pressure in the back pressure chamber.

[0012] In an optional embodiment, the second pressure chamber contains gas, and the pressure supply structure includes a gas source station, which is connected to the second pressure chamber.

[0013] In an optional embodiment, the back pressure chamber contains liquid, and the pressure control component includes a hydraulic station, which is connected to the back pressure chamber; or, the back pressure chamber contains gas, and the pressure control component includes an air source station, which is connected to the back pressure chamber.

[0014] In an optional embodiment, the back pressure chamber contains liquid, and the pressure control assembly includes an accumulator, which is connected to the back pressure chamber.

[0015] Beneficial effects: The accumulator is used as a pressure source, no external power source is required, and the compensator has a simple structure, which reduces the risk of leakage and reduces production costs.

[0016] In an optional embodiment, the compensator further includes a sealing ring, a groove is provided on the pressure rod, the sealing ring is sleeved in the groove, and the sealing ring abuts against the cavity wall of the working cavity.

[0017] Beneficial effect: By setting the sealing ring, the sealing inside the compensator is improved, preventing the gas or liquid in the back pressure chamber and the ventilation chamber from leaking into the cavity.

[0018] In an optional embodiment, the compensator further includes a filter, wherein the filter is disposed on the cylinder body and is communicated with the ventilation cavity.

[0019] Beneficial effect: By setting the filter, dust and impurities in the outside air are prevented from entering the ventilation cavity, causing environmental pollution in the working cavity and affecting the sliding of the pressure rod.

[0020] In a second aspect, the utility model also provides a powder forming press, comprising the above-mentioned compensator. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a structural schematic diagram of a compensator when the pressure source in the embodiment of the utility model is an air source station or a hydraulic station (the air source station or the hydraulic station is not shown);

[0023] Figure 2 It is a structural schematic diagram of the compensator when the pressure source in the embodiment of the utility model is a gas source type supercharger (the gas source station is not shown);

[0024] Figure 3 This is a structural schematic diagram of a compensator when the pressure source is a spring-type supercharger in an embodiment of the utility model;

[0025] Figure 4 This is a schematic structural diagram of the compensator when the pressure source is an accumulator in an embodiment of the utility model.

[0026] Description of reference numerals:

[0027] 10. Cylinder body; 11. Cylinder body; 12. Cylinder head; 13. Back pressure chamber; 14. Vent chamber; 20. Pressure rod; 30. Supercharger; 31. Main body; 32. Piston; 33. Spring; 34. First pressure chamber; 35. Second pressure chamber; 40. Accumulator; 50. Sealing ring; 60. Filter. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0029] Combine the following Figures 1 to 4 , describing an embodiment of the utility model.

[0030] According to an embodiment of the utility model, on the one hand, a compensator is provided, including: a cylinder body 10, a pressure rod 20 and a pressure control assembly. A working chamber is formed inside the cylinder body 10, and a plurality of working chambers are provided; a plurality of pressure rods 20 are provided, and a plurality of pressure rods 20 are provided in a one-to-one correspondence with a plurality of working chambers, and the pressure rods 20 are slidably arranged in the working chamber, and the working chamber is divided into a back pressure chamber 13 and a ventilation chamber 14, and a plurality of back pressure chambers 13 are interconnected, and a plurality of ventilation chambers 14 are interconnected, and the ventilation chamber 14 is connected to the external environment; the pressure control assembly is connected to the back pressure chamber 13, and is suitable for providing pressure to the back pressure chamber 13.

[0031] By applying the compensator of this embodiment, the back pressure chambers 13 are interconnected so that each pressure rod 20 is subjected to the same back pressure, thereby ensuring that each pressure rod 20 has the same pressing force on the powder, thereby forming a block of equal density after pressing; the ventilation chamber 14 is connected to the external environment to prevent the ventilation chamber 14 from generating negative pressure (or positive pressure) when the pressure rod 20 floats upward (or downward), thereby affecting the sliding of the pressure rod 20 and affecting the quality of powder pressing.

[0032] Specifically, the sizes of the pressure rods 20 in this embodiment are the same.

[0033] It should be noted that when the pressing rod 20 presses the powder, it will receive a reaction force from the powder. When the reaction force of the powder received by the pressing rod 20 is equal to the back pressure, the pressing rod 20 retracts and floats.

[0034] It should be noted that the pressure control component has a unloading function. When the reaction force of the powder exerted on one or more pressure rods 20 is greater than the back pressure, the unloading function of the pressure control component starts to unload the pressure to ensure that the back pressure in the back pressure chamber 13 is stable; when the back pressure in the back pressure chamber 13 is less than the set value, the pressure control component adds pressure to the back pressure chamber 13 to ensure that the back pressure in the back pressure chamber 13 is stable.

[0035] It should be noted that the back pressure refers to the pressure exerted on the pressure rod 20 by the gas or liquid in the back pressure chamber 13 .

[0036] Specifically, the cylinder body 10 includes a cylinder body 11 and a cylinder cover 12. A plurality of grooves are formed inside the cylinder body 11. The cylinder body 11 is connected to the cylinder cover 12 to form a plurality of working chambers.

[0037] In one embodiment, Figure 2As shown, the back pressure chamber 13 contains liquid, the pressure control assembly includes a booster 30 and a pressure supply structure, the booster 30 is formed with a cavity, the booster 30 includes a piston portion 32, the piston portion 32 is slidably disposed in the cavity, and divides the cavity into a first pressure chamber 34 and a second pressure chamber 35, the first pressure chamber 34 contains liquid, the first pressure chamber 34 is connected to the back pressure chamber 13, and the second pressure chamber 35 is connected to the pressure supply structure.

[0038] It is worth noting that the liquid in the first pressure chamber 34 and the back pressure chamber 13 is stored in a closed space to reduce the risk of liquid leakage.

[0039] It is worth noting that the supply pressure of the pressure supply structure can be adjusted to achieve pressure adjustment of the second pressure chamber 35 , and the pressure of the second pressure chamber 35 is transmitted to the first pressure chamber 34 through the piston portion 32 , thereby achieving pressure adjustment of the back pressure chamber 13 .

[0040] In one embodiment, Figure 2 As shown, the cavity cross-sectional area of ​​the second pressure cavity 35 is greater than the cavity cross-sectional area of ​​the first pressure cavity 34 .

[0041] It is worth noting that the cavity cross-sectional area of ​​the second pressure chamber 35 is larger than the cavity cross-sectional area of ​​the first pressure chamber 34, obtaining a pressurization effect proportional to the cavity cross-sectional area, thereby increasing the supply pressure of the pressure supply structure.

[0042] In yet another embodiment, Figure 3 As shown, the supercharger 30 also includes a main body 31, which is arranged on the cylinder body 10. The main body 31 forms a cavity. The pressure supply structure includes a spring 33, which is arranged in the second pressure chamber 35. One end of the spring 33 is connected to the piston part 32, and the other end of the spring 33 is connected to the main body 31.

[0043] It should be noted that different springs 33 may be selected or the compression amount of the spring 33 may be adjusted to adjust the compression force of the spring 33 and further adjust the pressure in the back pressure chamber 13 .

[0044] It is worth noting that the pressure provided by the spring 33 to the piston portion 32 is adjusted by adjusting the compression force of the spring 33 , thereby adjusting the pressure in the back pressure chamber 13 .

[0045] In one embodiment, Figure 2 As shown, the second pressure chamber 35 contains gas, and the pressure supply structure includes a gas source station, which is connected to the second pressure chamber 35 .

[0046] It should be noted that the output air flow of the air source station is adjustable.

[0047] In yet another embodiment, the back pressure chamber 13 is filled with liquid, and the pressure control assembly includes a hydraulic station, which is connected to the back pressure chamber 13 .

[0048] It should be noted that the hydraulic station has a unloading valve.

[0049] It should be further explained that when the reaction force of the powder exerted on one or more pressure rods 20 is greater than the back pressure, the pressure rods 20 retract and float. At this time, the unloading valve returns liquid to ensure that the back pressure in the back pressure chamber 13 is stable; when the back pressure in the back pressure chamber 13 is less than the set value, the hydraulic station injects liquid into the back pressure chamber 13 to ensure that the back pressure in the back pressure chamber 13 is stable.

[0050] In yet another embodiment, the back pressure chamber 13 is filled with gas, and the pressure control assembly includes a gas source station, which is connected to the back pressure chamber 13 .

[0051] It should be noted that the gas source station has a unloading valve.

[0052] It should be further explained that when the reaction force of the powder exerted on one or more pressure rods 20 is greater than the back pressure, the pressure rods 20 retract and float. At this time, the unloading valve returns air to ensure that the back pressure in the back pressure chamber 13 is stable; when the back pressure in the back pressure chamber 13 is less than the set value, the hydraulic station intakes air into the back pressure chamber 13 to ensure that the back pressure in the back pressure chamber 13 is stable.

[0053] In yet another embodiment, Figure 4 As shown, the back pressure chamber 13 contains liquid, and the pressure control assembly includes an accumulator 40 , which is connected to the back pressure chamber 13 .

[0054] Specifically, when the force applied to one or more pressure rods 20 is greater than the back pressure, the pressure rod 20 overcomes the back pressure and returns, and the liquid in the back pressure chamber 13 enters the accumulator 40 through the channel, compressing the gas in the accumulator 40; when the force applied to the pressure rod 20 is less than the back pressure, the liquid returns to the back pressure chamber 13 under the action of the accumulator 40, ensuring that the pressure rod 20 is in an extended state.

[0055] For details, please refer to Figure 4 In this embodiment, the accumulator 40 is disposed outside the cylinder body 10 .

[0056] Of course, in other alternative implementations, an energy storage chamber may be provided inside the cylinder body 10 , and the energy accumulator 40 is disposed inside the cylinder body 10 .

[0057] It is worth noting that the accumulator 40 is used as a pressure source, and no external power source is required. The compensator has a simple structure, which reduces the risk of leakage and reduces production costs.

[0058] In one embodiment, Figures 1 to 4As shown, the compensator further includes a sealing ring 50. A groove is provided on the pressure rod 20. The sealing ring 50 is sleeved in the groove, and the sealing ring 50 abuts against the cavity wall of the working cavity.

[0059] It should be noted that a plurality of sealing rings 50 may be provided to further improve the sealing performance of the overall structure.

[0060] It is worth noting that, by providing the sealing ring 50 , the sealing performance inside the compensator is improved, thereby preventing the gas or liquid in the back pressure chamber 13 and the ventilation chamber 14 from leaking into the chamber.

[0061] In one embodiment, Figures 1 to 4 As shown, the compensator further includes a filter 60 , which is disposed on the cylinder body 10 and communicates with the ventilation chamber 14 .

[0062] It is worth noting that, by providing the filter 60 , dust and impurities in the outside air are prevented from entering the ventilation cavity 14 , causing environmental pollution in the working cavity and affecting the sliding of the pressure rod 20 .

[0063] According to an embodiment of the present utility model, on the other hand, a powder forming press is provided, comprising the above-mentioned compensator.

[0064] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A compensator, characterized in that: include: A cylinder body (10) has a working chamber formed inside, wherein a plurality of working chambers are provided; A plurality of pressure rods (20) are provided, and the plurality of pressure rods (20) are provided in one-to-one correspondence with the plurality of working chambers. The pressure rods (20) are slidably provided in the working chamber, and divide the working chamber into a back pressure chamber (13) and a ventilation chamber (14). The plurality of back pressure chambers (13) are interconnected, and the plurality of ventilation chambers (14) are interconnected, and the ventilation chamber (14) is connected to the external environment; A pressure control component is communicated with the back pressure chamber (13) and is suitable for providing pressure to the back pressure chamber (13).

2. The compensator according to claim 1, characterized in that The back pressure chamber (13) contains liquid, and the pressure control component includes a booster (30) and a pressure supply structure. The booster (30) is formed with a cavity. The booster (30) includes a piston portion (32). The piston portion (32) is slidably disposed in the cavity and divides the cavity into a first pressure chamber (34) and a second pressure chamber (35). The first pressure chamber (34) contains liquid, and the first pressure chamber (34) is connected to the back pressure chamber (13), and the second pressure chamber (35) is connected to the pressure supply structure.

3. The compensator according to claim 2, characterized in that: The cavity cross-sectional area of ​​the second pressure cavity (35) is greater than the cavity cross-sectional area of ​​the first pressure cavity (34).

4. The compensator according to claim 3, characterized in that: The supercharger (30) further comprises a main body (31), wherein the main body (31) is arranged on the cylinder body (10), and the cavity is formed on the main body (31); the pressure supply structure comprises a spring (33), and the spring (33) is arranged in the second pressure chamber (35); one end of the spring (33) is connected to the piston part (32), and the other end of the spring (33) is connected to the main body (31).

5. The compensator according to claim 3, characterized in that: The second pressure chamber (35) contains gas, and the pressure supply structure comprises a gas source station, which is connected to the second pressure chamber (35).

6. The compensator according to claim 1, characterized in that The back pressure chamber (13) contains liquid, and the pressure control component includes a hydraulic station, which is connected to the back pressure chamber (13); or, the back pressure chamber (13) contains gas, and the pressure control component includes an air source station, which is connected to the back pressure chamber (13).

7. The compensator according to claim 1, characterized in that: The back pressure chamber (13) contains liquid, and the pressure control component comprises an accumulator (40), which is in communication with the back pressure chamber (13).

8. The compensator according to any one of claims 1 to 7, characterized in that: The compensator further comprises a sealing ring (50), the pressure rod (20) is provided with a groove, the sealing ring (50) is sleeved in the groove, and the sealing ring (50) abuts against the cavity wall of the working cavity.

9. The compensator according to any one of claims 1 to 7, characterized in that: The compensator further comprises a filter (60), wherein the filter (60) is arranged on the cylinder body (10), and the filter (60) is in communication with the ventilation chamber (14).

10. A powder forming press, characterized in that: A compensator comprising the compensator as claimed in any one of claims 1 to 9.

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