A quantitative powder feeding mechanism and powder feeding method capable of automatically adjusting the powder filling amount

Abstract

The present invention discloses a quantitative powder feeding mechanism and powder feeding method capable of automatically adjusting the powder filling amount, which comprises a powder receiving plate, a hopper mounted on the powder receiving plate, a first powder baffle plate fitted between the hopper and the powder receiving plate and movable horizontally, a powder feeding plate fitted on the lower surface of the powder receiving plate and movable horizontally, a second powder baffle plate fitted below the powder feeding plate and movable horizontally, a quantitative ejector rod located below the second powder baffle plate, and a driving member driving the quantitative ejector rod to move up and down; the first powder baffle plate, the powder receiving plate, the powder feeding plate, and the second powder baffle plate are respectively provided with a plurality of first powder leakage holes, powder receiving holes, second powder leakage holes, and third powder leakage holes. When feeding powder, the above-mentioned hole structures are connected up and down, and the driving member controls the depth of the quantitative ejector rod to be inserted upward into the powder receiving plate to realize the control of the powder filling amount. The present invention can realize quantitative powder feeding and can also flexibly and automatically adjust the amount of powder feeding to meet the powder quantity requirements of various powder forming products.

Description

Technical Field

[0001] The invention belongs to the technical field of powder forming equipment, and in particular relates to a quantitative powder feeding mechanism and a powder feeding method capable of automatically adjusting the powder filling amount. Background Art

[0002] A powder forming machine is a device that stamps metal powder into a product of a fixed shape and is widely used in the manufacturing industry. A powder forming machine generally includes an upper mold assembly, a lower mold assembly, a drive assembly that drives the upper and lower molds to close and open, and a powder feeding unit. The powder feeding amount of the traditional powder feeding unit cannot be quantitatively delivered, resulting in uneven quality of stamped products; the patent application number 201320157228.X in the prior art discloses a powder forming mold with quantitative powder feeding. Although it realizes the function of quantitative powder feeding, the amount of powder fed each time is fixed. If the product type changes, the powder feeding module needs to be replaced, which is time-consuming and material-intensive. In the prior art, the patent publication number CN106825555B discloses a quantitative powder feeding device and a powder molding device. Although the powder filling amount is adjustable, there are the following disadvantages: 1) The powder storage box is movable, which is easy to cause powder leakage and get stuck in the gap between the contact plates, affecting the smooth movement of the movable plates; 2) In the whole device, there are too many plates that move relatively, and the required driving parts are also increased, which increases the cost and the structure is complicated; 3) In terms of its action process, although the quantitative adjustment during powder filling is achieved according to the disclosed structure, it is impossible to truly achieve that after the powder is filled into the quantitative plate, it enters the material hole, then enters the powder feeding hole, and finally enters the mold, because, in this process, after the powder enters the powder feeding hole, it must be misaligned with the powder feeding hole to ensure that the powder will not leak down, and when the misalignment occurs, the quantitative rod cannot penetrate the powder feeding hole and the powder feeding hole at the same time, and the powder feeding hole needs to be blocked so that the powder stays in the powder feeding hole and moves, and this technical problem is not solved in the patent, so it is impossible to truly complete the complete powder filling amount adjustment and quantitative powder feeding.

[0003] Therefore, it is necessary to provide a new quantitative powder feeding mechanism and powder feeding method that can automatically adjust the powder filling amount to solve the above problems. Summary of the invention

[0004] One of the main purposes of the present invention is to provide a quantitative powder feeding mechanism that can automatically adjust the powder filling amount, which can realize quantitative powder feeding and can also flexibly and automatically adjust the amount of powder fed to meet the powder quantity requirements of various powder molding products.

[0005] The present invention achieves the above-mentioned purpose through the following technical scheme: a quantitative powder feeding mechanism capable of automatically adjusting the powder filling amount, comprising a powder receiving plate, a hopper mounted on the powder receiving plate, a first powder baffle plate fitted between the bottom of the hopper and the powder receiving plate and controlling whether the powder in the hopper leaks down, a horizontally movably fitted on the lower surface of the powder receiving plate, a second powder baffle plate fitted under the powder feeding plate and controlling whether the powder in the powder feeding plate leaks down, a quantitative push rod located under the second powder baffle plate, and a driving member driving the quantitative push rod to move up and down; the first powder baffle plate, the powder receiving plate, the powder feeding plate, and the second powder baffle plate are respectively provided with a plurality of first powder leakage holes, powder receiving holes, second powder leakage holes, and third powder leakage holes. When feeding powder, the above-mentioned hole structures are connected up and down, and the driving member controls the depth of the quantitative push rod to be inserted upward into the powder receiving hole to realize powder filling amount control.

[0006] Furthermore, the second powder leakage hole is connected or blocked with the powder receiving hole as the powder feeding plate moves horizontally relative to the powder receiving plate; the third powder leakage hole is connected or blocked with the second powder leakage hole as the second powder blocking plate moves horizontally relative to the powder feeding plate.

[0007] Furthermore, the hopper includes a bottom plate, and a plurality of openings penetrating the upper and lower surfaces are arranged on the bottom plate.

[0008] Furthermore, it also includes a first cylinder that drives the first powder baffle plate to perform horizontal linear motion. The first powder leakage hole is connected or blocked with the opening as the first powder baffle plate moves horizontally relative to the bottom plate, thereby realizing automatic control of whether the powder in the hopper is output.

[0009] Furthermore, it also includes a movable plate that is horizontally movable and is attached to the lower surface of the powder receiving plate, and a driving component that drives the movable plate to perform horizontal linear motion. The powder feeding plate is embedded in the movable plate and the surfaces of the two are flush.

[0010] Furthermore, it also includes a second cylinder fixed on the movable plate and driving the second powder baffle plate to perform horizontal linear motion.

[0011] Furthermore, the driving assembly includes a second driving member located above the movable plate, a swing arm driven by the second driving member to rotate around its rotation axis, and a transmission rod with one end hinged to the swing arm and the other end hinged to the movable plate.

[0012] Furthermore, it also includes a lifting plate, which is driven by the driving member to move up and down, and the quantitative ejector rod is integrally fixed on the lifting plate.

[0013] Furthermore, it also includes a third cylinder fixed below the lifting plate, and a powder filling guide shaft driven by the third cylinder to move up and down and capable of penetrating into the powder receiving plate.

[0014] Another main object of the present invention is to provide a powder feeding method, which comprises the following steps:

[0015] 1) providing a powder receiving plate and a plurality of quantitative ejectors that move up and down, inserting the quantitative ejectors into the powder receiving plate from below, and controlling the insertion depth according to the amount of powder;

[0016] 2) dropping powder from a hopper into the powder receiving plate, and then closing the hopper;

[0017] 3) The quantitative ejector pin is moved downward so that the powder in the powder receiving plate falls into a feeding plate, and a second powder blocking plate is arranged below the powder feeding plate. At this time, the quantitative ejector pin passes through the second powder blocking plate and the top of the ejector pin blocks the bottom of the feeding plate;

[0018] 4) The second powder blocking plate and the powder feeding plate are displaced so that the second powder blocking plate blocks the bottom of the powder feeding plate;

[0019] 5) The quantitative ejector pin is moved downward to be separated from the second powder blocking plate, and the relative position of the second powder blocking plate and the powder feeding plate is fixed;

[0020] 6) The powder feeding plate and the second powder blocking plate are synchronously moved to the position of the forming mold, and the second powder blocking plate is moved to cancel the blockage of the bottom of the second powder blocking plate to complete the powder feeding;

[0021] 7) The powder feeding plate and the second powder blocking plate are synchronously moved back to the powder receiving position for the next round of powder receiving action.

[0022] Compared with the prior art, the quantitative powder feeding mechanism and powder feeding method of the present invention which can automatically adjust the powder filling amount have the following beneficial effects: by setting a quantitative push rod and using a driving motor to drive it to move up and down, the insertion height of the quantitative push rod in the powder receiving plate is accurately controlled, thereby controlling and adjusting the powder amount in the powder receiving plate; after closing the powder feeding, as the quantitative push rod continues to descend, the powder in the powder receiving plate is introduced into the powder feeding plate, and then finally fed into the forming mold by the powder feeding plate, thereby greatly improving the versatility of the powder forming machine and realizing the online adjustment of the powder feeding amount. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0024] Figure 2 It is a schematic diagram of the explosion structure of an embodiment of the present invention;

[0025] Figure 3 It is a schematic diagram of the explosion structure of the upper part of the powder receiving plate according to an embodiment of the present invention;

[0026] Figure 4 It is a schematic diagram of the explosion structure of the lower part of the powder receiving plate according to an embodiment of the present invention;

[0027] The numbers in the figure represent:

[0028] 100 Quantitative powder feeding mechanism which can automatically adjust the powder filling amount;

[0029] 1 powder receiving plate, 11 powder receiving hole, 12 limiting guide roller;

[0030] 2 hopper, 21 bottom plate, 22 baffle plate, 23 cover plate, 24 opening;

[0031] 3 door control unit, 31 first cylinder, 32 first powder baffle, 33 first powder leakage hole;

[0032] 4 powder feeding unit, 41 movable plate, 42 powder feeding plate, 421 second powder leakage hole, 43 second cylinder, 44 second powder blocking plate, 441 third powder leakage hole, 45 driving assembly, 451 second driving member, 452 swing arm, 453 transmission rod;

[0033] 5 powder quantity adjustment unit, 51 first driving member, 52 lifting plate, 53 quantitative ejector pin, 54 third cylinder, 55 powder filling guide shaft, 56 guide rod, 57 guide sleeve. DETAILED DESCRIPTION Example

[0034] Please refer to Figure 1-Figure 4 The present embodiment is a quantitative powder feeding mechanism 100 capable of automatically adjusting the powder filling amount, which comprises a powder receiving plate 1 provided with a plurality of powder receiving holes 11, a hopper 2 mounted on the powder receiving plate 1, a gate control unit 3 located between the hopper 2 and the powder receiving plate 1 and controlling whether the powder in the hopper 2 leaks down, a powder feeding unit 4 located below the powder receiving plate 1, and a powder amount adjusting unit 5 located below the powder feeding unit 4 and capable of adjusting the powder filling amount up and down.

[0035] The hopper 2 includes a bottom plate 21, a baffle plate 22, and an openable cover plate 23. The bottom plate 21 is provided with a plurality of openings 24 that pass through the upper and lower surfaces. In this embodiment, the openings 24 are strip-shaped openings and four strips are arranged in parallel. In other embodiments, the openings 24 can also be set in other shapes, and the present case does not limit the shape thereof.

[0036] In this embodiment, the hopper 2 is quantitatively filled with powder and then supplied to the powder receiving plate 1. In other embodiments, a separate automatic powder supply device may be provided, the output port of which is connected to the hopper 2 through a pipeline to realize automatic replenishment, and the gate control unit 3 is used to control whether the hopper 2 outputs powder.

[0037] The gate control unit 3 includes a first cylinder 31, and a first powder baffle plate 32 driven by the first cylinder 31 to move horizontally and arranged corresponding to the bottom plate 21. The first powder baffle plate 32 is horizontally movably arranged between the bottom plate 21 of the hopper 2 and the powder receiving plate 1. The lower surface of the bottom plate 21 is recessed upward and provided with a slide groove (not marked in the figure) for guiding the linear motion trajectory of the first powder baffle plate 32. The first powder baffle plate 32 is provided with a plurality of first powder leakage holes 33. The first powder leakage holes 33 are connected or blocked with the opening 24 as the first powder baffle plate 32 moves horizontally relative to the bottom plate 21, thereby realizing automatic control of whether the powder in the hopper 2 is output.

[0038] The powder feeding unit 4 includes a movable plate 41 which is horizontally movable and is fitted on the lower surface of the powder receiving plate 1, a powder feeding plate 42 which is embedded in the movable plate 41, a second cylinder 43 fixed on the movable plate 41, a second powder blocking plate 44 which is driven by the second cylinder 43 to perform horizontal linear motion and is fitted under the powder feeding plate 42, and a driving component 45 which drives the movable plate 41 to perform horizontal linear motion.

[0039] A plurality of second powder leakage holes 421 and a third powder leakage holes 441 are respectively provided on the powder feeding plate 42 and the second powder blocking plate 44; the second powder leakage holes 421 are connected or blocked with the powder receiving holes 11 as the movable plate 41 moves horizontally relative to the powder receiving plate 1; the third powder leakage holes 441 are connected or blocked with the second powder leakage holes 421 as the second powder blocking plate 44 moves horizontally relative to the powder feeding plate 42.

[0040] The powder feeding plate 42 is flush with the surface of the movable plate 41. In this embodiment, the powder feeding plate 42 and the movable plate 41 are designed as two structures, which is convenient for disassembling the powder feeding plate 42 for timely replacement, maintenance, or cleaning. In other embodiments, the powder feeding plate 42 and the movable plate 41 can also be designed as an integrated structure.

[0041] Four limiting guide rollers 12 are arranged below the powder receiving plate 1 . The limiting guide rollers 12 are divided into two pairs and symmetrically located on both sides of the movable plate 41 to limit and guide the movement trajectory of the movable plate 41 .

[0042] A pair of L-shaped supporting plates are provided on the lower surface of the movable plate 41 to form a slide groove, and the second powder blocking plate 44 is supported by the L-shaped supporting plates and slides in the slide groove.

[0043] The driving assembly 45 includes a second driving member 451 located above the movable plate 41, a swing arm 452 driven by the second driving member 451 to rotate around its rotation axis, and a transmission rod 453 hinged at one end to the swing arm 452 and hinged at the other end to the movable plate 41. The swing arm 452 is driven by the second driving member 451 to swing, thereby realizing the horizontal linear motion of the movable plate 41. The second driving member 451 is separately arranged at the top, away from the powder filling module, and the horizontal linear motion of the movable plate 41 is realized by rotating the swing arm, which can effectively prevent the powder from getting stuck in the driving member and affecting the service life of the driving member. In other embodiments, the driving assembly 45 can also be directly driven by a cylinder.

[0044] The powder quantity regulating unit 5 comprises a first fixed driving member 51, a lifting plate 52 driven by the first driving member 51 to move up and down, a plurality of quantitative ejectors 53 fixed on the lifting plate 52, a third cylinder 54 fixed below the lifting plate 52, and a powder filling guide shaft 55 driven by the third cylinder 54 to move up and down. When filling powder, the powder filling guide shaft 55 is in an ejection state and passes through the lifting plate 52, the second powder baffle plate 44, the powder feeding plate 42 and the powder receiving plate 1 in sequence, ensuring that the holes for powder leakage in the lifting plate 52, the second powder baffle plate 44, the powder feeding plate 42 and the powder receiving plate 1 are connected up and down, preventing the quantitative ejector 53 from being damaged due to the inadequate position of one of the above plates during the rising process, and damaging the first driving member 51, thereby protecting the first driving member 51.

[0045] When filling powder, the opening 24, the first powder leakage hole 33, the powder receiving hole 11, the second powder leakage hole 421, and the third powder leakage hole 441 are connected from top to bottom, and the quantitative ejector pin 53 passes through them, and the amount of powder received in the powder receiving hole 11 is controlled by the insertion depth of the quantitative ejector pin 53 in the powder receiving hole 11.

[0046] A plurality of guide rods 56 are provided below the powder receiving plate 1 , and the lifting plate 52 moves up and down on the guide rods 56 via guide sleeves 57 .

[0047] This embodiment also provides a quantitative powder feeding method capable of automatically adjusting the powder filling amount, which comprises the following steps:

[0048] In the initial state, the first powder leakage hole 33 is blocked from the opening 24, the powder feeding plate 42 is located at the powder receiving position, and the second powder leakage hole 421 is connected to the third powder leakage hole 441; the hopper 2 is filled with powder, or the powder automatic feeding unit automatically supplies the powder to the hopper 2;

[0049] 1) The third air cylinder 54 drives the powder filling guide shaft 55 to be pushed out to the conducting through position, and detects whether the powder feeding plate 42 and the second powder leakage plate 44 are moved to the position;

[0050] 2) The first driving member 51 drives the lifting plate 52 to rise, so that the quantitative ejector pin 53 rises to the powder receiving position, and the top of the quantitative ejector pin 53 is flush with the opening of the second powder leakage hole 421;

[0051] 3) The first cylinder 31 drives the first powder baffle plate 32 to move, so that the first powder leakage hole 33 is connected to the opening 24, and a part of the powder in the hopper 2 leaks down from the opening 24 to the powder receiving hole 11 in the powder receiving plate 1 and fills it;

[0052] 4) The first driving member 51 drives the lifting plate 52 to rise again, so that the top of the quantitative ejector pin 53 rises to the quantitative position, so that the powder in the powder receiving hole 11 reaches the set total amount. At this time, the top of the quantitative ejector pin 53 stays at the set height of the powder receiving hole 11;

[0053] 5) The first cylinder 31 drives the first powder baffle 32 to move and close the opening 24 to feed powder;

[0054] 6) The third cylinder 54 drives the powder filling guide shaft 55 to retract;

[0055] 7) The first driving member 51 drives the lifting plate 52 to descend so that the top end of the quantitative ejector pin 53 extends into the second powder blocking plate 44. At this time, the second cylinder 43 is in the exhaust state;

[0056] 8) The second driving member 451 drives the powder feeding plate 42 to move forward, so that the second powder leakage hole 421 and the third powder leakage hole 441 are misaligned and blocked. Since the second cylinder 43 is in a non-working state, the second powder blocking plate 44 does not move forward synchronously with the powder feeding plate 42 under the blocking effect of the quantitative ejector pin 53, thereby achieving misalignment;

[0057] 9) The first driving member 51 drives the lifting plate 52 to continue to descend so that the quantitative ejector pin 53 is separated from the second powder blocking plate 44;

[0058] 10) The second air cylinder 43 is started to fix the position of the second powder blocking plate 44 to ensure that the second powder leakage hole 421 is closed;

[0059] 11) The second driving member 451 drives the powder feeding plate 42 to enter the powder filling position of the mold;

[0060] 12) The second air cylinder 43 drives the second powder leakage plate 44 to move, so that the second powder leakage hole 421 is connected with the third powder leakage hole 441, and the powder feeding is completed;

[0061] 13) The powder feeding plate 42 returns to the powder receiving position to carry out the next cycle action.

[0062] In order to ensure that powder does not leak to the outside when the quantitative push rod 53 moves up and down, firstly, in this embodiment, the aperture sizes of the powder receiving hole 11 in the powder receiving plate 1, the second powder leakage hole 421 in the powder feeding plate 42, and the third powder leakage hole 441 are designed to be the same, and the difference with the outer diameter of the quantitative push rod 53 is very small. It can be designed according to the diameter of the powder particles. Under the premise of ensuring that the quantitative push rod 53 can move up and down between the powder receiving plate 1 and the second powder blocking plate 44, the gap is minimized to avoid leakage of powder; secondly, the lower diameter of the quantitative push rod 53 is larger than the inner diameter of the third powder leakage hole 441.

[0063] The quantitative powder feeding mechanism and powder feeding method of the present embodiment can automatically adjust the powder filling amount. By setting a quantitative push rod and using a driving motor to drive it to move up and down, the insertion height of the quantitative push rod in the powder receiving plate is accurately controlled, thereby controlling and adjusting the powder amount in the powder receiving plate; after closing the powder feeding, as the quantitative push rod continues to descend, the powder in the powder receiving plate is introduced into the powder feeding plate, and then finally fed into the molding mold by the powder feeding plate, which greatly improves the versatility of the powder molding machine and can realize the online adjustment of the powder feeding amount.

[0064] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A quantitative powder feeding mechanism capable of automatically adjusting the powder filling amount, characterized in that: The powder collecting plate comprises a powder receiving plate, a hopper mounted on the powder receiving plate, a first powder baffle plate fitted between the bottom of the hopper and the powder receiving plate and controlling whether the powder in the hopper leaks down, a powder feeding plate fitted on the lower surface of the powder receiving plate and movably arranged horizontally, a second powder baffle plate fitted under the powder feeding plate and controlling whether the powder in the powder feeding plate leaks down, a quantitative push rod located under the second powder baffle plate, and a driving member driving the quantitative push rod to move up and down; the first powder baffle plate, the powder receiving plate, the powder feeding plate and the second powder baffle plate are respectively provided with a plurality of first powder leakage holes, powder receiving holes, second powder leakage holes and third powder leakage holes. When feeding powder, the above-mentioned hole structures are connected up and down, and the driving member controls the The depth of the quantitative push rod inserted upward into the powder receiving hole realizes the control of the powder filling amount; the hopper includes a bottom plate, and a plurality of openings penetrating the upper and lower surfaces are arranged on the bottom plate; the first powder leakage hole realizes connection or blockage with the opening as the first powder baffle plate moves horizontally relative to the bottom plate; the second powder leakage hole realizes connection or blockage with the powder receiving hole as the powder feeding plate moves horizontally relative to the powder receiving plate; the third powder leakage hole realizes connection or blockage with the second powder leakage hole as the second powder baffle plate moves horizontally relative to the powder feeding plate; after closing the powder feeding, as the quantitative push rod continues to descend, the powder in the powder receiving plate is introduced into the powder feeding plate, and then finally fed into the forming mold by the powder feeding plate.

2. The quantitative powder feeding mechanism capable of automatically adjusting the powder filling amount as claimed in claim 1, characterized in that: It also includes a first cylinder for driving the first powder baffle to perform horizontal linear motion.

3. The quantitative powder feeding mechanism capable of automatically adjusting the powder filling amount as claimed in claim 1, characterized in that: It also includes a movable plate that is horizontally movable and is attached to the lower surface of the powder receiving plate, and a driving component that drives the movable plate to perform horizontal linear motion. The powder feeding plate is embedded in the movable plate and the surfaces of the two are flush.

4. The quantitative powder feeding mechanism capable of automatically adjusting the powder filling amount as claimed in claim 3, characterized in that: It also includes a second cylinder fixed on the movable plate and driving the second powder baffle plate to perform horizontal linear motion.

5. The quantitative powder feeding mechanism capable of automatically adjusting the powder filling amount as claimed in claim 3, characterized in that: The driving assembly comprises a second driving member located above the movable plate, a swing arm driven by the second driving member to rotate around its rotation axis, and a transmission rod hinged at one end to the swing arm and at the other end to the movable plate.

6. The quantitative powder feeding mechanism capable of automatically adjusting the powder filling amount as claimed in claim 1, characterized in that: It also includes a lifting plate, which is driven by the driving member to move up and down, and the quantitative ejector rod is integrally fixed on the lifting plate.

7. The quantitative powder feeding mechanism capable of automatically adjusting the powder filling amount as claimed in claim 6, characterized in that: It also includes a third cylinder fixed below the lifting plate, and a powder filling guide shaft driven by the third cylinder to move up and down and capable of penetrating to the powder receiving plate.

8. A powder feeding method, characterized in that: The quantitative powder feeding mechanism capable of automatically adjusting the powder filling amount according to claim 1 is implemented, and comprises the following steps: 1) providing a powder receiving hole and a plurality of quantitative ejectors that move up and down, inserting the quantitative ejectors into the powder receiving hole from below, and controlling the insertion depth according to the amount of powder; 2) dropping powder from a hopper into the powder receiving hole, and then closing the hopper; 3) The quantitative ejector pin is moved downward so that the powder in the powder receiving hole falls into a feeding plate, and a second powder blocking plate is arranged below the powder feeding plate. At this time, the quantitative ejector pin passes through the second powder blocking plate and the top of the ejector pin blocks the bottom of the feeding plate; 4) The second powder blocking plate and the powder feeding plate are displaced so that the second powder blocking plate blocks the bottom of the powder feeding plate; 5) The quantitative ejector pin is moved downward to be separated from the second powder blocking plate, and the relative position of the second powder blocking plate and the powder feeding plate is fixed; 6) The powder feeding plate and the second powder blocking plate are synchronously moved to the position of the forming mold, and the second powder blocking plate is moved to cancel the blockage of the bottom of the second powder blocking plate to complete the powder feeding; 7) The powder feeding plate and the second powder blocking plate are synchronously moved back to the powder receiving position for the next round of powder receiving action.

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