Quantitative powder feeding mechanism of powder forming machine and powder forming machine

Abstract

The utility model relates to the technical field of powder forming, and discloses a quantitative powder feeding mechanism of a powder forming machine and the powder forming machine. The quantitative powder feeding mechanism comprises a feeding frame, a feeding piece and a feeding piece are arranged on the feeding frame, and a discharging hole communicating with a feeding pipe is formed in an upper concave part of the feeding piece; the quantifying piece is provided with a material quantifying hole and a material pushing piece; the feeding piece moves on the quantifying piece, a material storage hole is formed in the feeding piece, the feeding piece and / or the feeding piece are / is provided with a material scraping end, the material pushing piece pushes the material powder in the material fixing hole into the material storage hole, and the material powder is pushed to the position of the discharging hole through the feeding piece so that the material powder can fall into a female die cavity below. The material fixing holes are preset according to the actual material using amount of products, the feeding amount each time can exceed the actual material using amount, redundant materials are scraped off by pushing the feeding piece or the feeding piece, and it can be guaranteed that the feeding amount each time is accurate. And the structure is simpler, the working process is simplified, the equipment cost is reduced, and the feeding efficiency is improved.

Description

Technical Field

[0001] The utility model relates to powder forming machine equipment, in particular to a quantitative powder feeding mechanism of a powder forming machine and a powder forming machine. Background Art

[0002] A powder forming machine is a mechanical device specially used for pressing and molding powder products. It can compress powder particles into a dense body with the desired shape and size in a mold by applying high pressure. It is widely used in the production process of powder metallurgy, ceramics, plastics and other industries. When the powder forming machine presses and molds powder products, it is necessary to accurately control the amount of powder. The existing technology discloses that a quantitative hole is set to accommodate a quantitative powder, and then the quantitative powder is transferred to the concave mold through a transfer structure.

[0003] For example, utility model patent CN106825555A discloses a quantitative powder feeding device and powder forming equipment, the principle of which is to set a quantitative hole to accommodate a quantitative powder, and the volume of the quantitative hole can be adjusted by adjusting the amount of insertion of the quantitative rod into the quantitative hole according to the actual use of the powder, so that the amount of powder contained in the quantitative hole can be changed very conveniently, improving the adaptability to the production of products with different powder requirements. It has the following disadvantages:

[0004] 1. It does not take into account the deviation of the amount of material discharged each time, and cannot guarantee a certain amount of material discharged each time. Although the size of the quantitative hole is pre-set according to the actual product, it cannot guarantee that the material is discharged to a specific preset position every time when discharging. For example, when filling, the required amount of material is met, but how to ensure that the quantitative hole can be accurately filled every time? If it is guaranteed to be filled every time, it is easy to overflow, so the actual feeding amount will be too large, and the overflow will also affect the sealing between the components.

[0005] 2. Its structure is complex, requiring not only the arrangement of quantitative plates, quantitative rods, material storage tanks, bottom plates and other structures, but also the arrangement of feeding rods, powder baffles and other structures; and multiple driving mechanisms are required, for example, a sliding drive device drives the quantitative plate, a powder supply drive device drives the powder storage tank, a quantitative drive device drives the quantitative rod, and the material baffle plate also requires a drive device; and multiple material holes are also required, such as powder storage holes, quantitative holes, material holes, quantitative rod holes, powder feeding holes, powder feeding holes, powder feeding holes, powder feeding rod holes, etc.

[0006] 3. The process of achieving quantitative feeding is also very complicated. Utility Model Content

[0007] In view of the above problems, the utility model provides a quantitative powder feeding mechanism for a powder forming machine and a powder forming machine, which not only have a simpler structure but also can achieve more accurate quantitative powder feeding.

[0008] The utility model is realized by the following scheme:

[0009] A quantitative powder feeding mechanism for a powder forming machine, used for conveying powder to a concave die of the powder forming machine, comprising: a feeding arm, the feeding arm is connected to a feeding rack, a feeding piece, located on the feeding rack, the feeding piece is connected to a feeding pipe for conveying powder, the bottom of the feeding piece has a recessed portion, the recessed portion is provided with a feed hole connected to the feed pipe; a quantitative piece, which can be installed above the concave die of the powder forming machine, the quantitative piece is provided with a quantitative hole of a preset capacity and a pushing piece movable in the quantitative hole, the quantitative piece is also provided with a discharge hole, when feeding, the powder enters the quantitative hole through the discharge hole The material hole; a feeding piece is located on the feeding rack and can move on the quantitative piece, and a storage hole matching with the quantitative hole is arranged on it. The bottom of the feeding piece and / or the bottom of the feeding piece is provided with a scraping end matching with the quantitative piece, which is used to scrape off excess material powder above the quantitative hole, and then the pushing piece pushes the material powder in the quantitative hole into the storage hole, and the feeding piece pushes the material powder to the discharge hole position so that it falls into the concave model cavity below. The feeding piece and the feeding piece are both located on the feeding rack and are rotatably connected to the feeding rack, and the feeding arm is rotatably connected to the feeding rack.

[0010] Preferably, the metering member is provided with a non-through trough for collecting excess powder cooperating with the scraper end, the trough is located behind the metering hole and has at least two, and is also provided with a brush or a blowing vent for cleaning excess powder in the trough.

[0011] Preferably, the metering member is provided with a through material trough cooperating with the scraping end, the material trough is located behind the metering hole, and a material box or a material bag is connected below the material trough.

[0012] Preferably, a mounting groove is provided at the bottom of the feeding member, the scraping end is mounted in the mounting groove, and the scraping end is a flexible member.

[0013] Preferably, the scraper end comprises a flexible scraper plate and scraper bristles, the scraper plate is arranged in a cone shape with a thick upper part and a thin lower part, and the scraper bristles are located on both sides of the scraper plate and protrude from the scraper plate.

[0014] Preferably, the feeding piece is located at the front part of the feeding piece, a scraper end is provided on at least one side of the front and rear of the recessed part, the quantitative piece is in the shape of a plate, the quantitative hole is provided on the side close to the feeding arm, and the discharge hole cooperating with the storage hole is provided on the side away from the feeding arm.

[0015] Preferably, a detection element for detecting the position of the pushing piece is arranged in the material fixing hole.

[0016] The present application also provides a powder forming machine, including the quantitative feeding mechanism of the powder forming machine mentioned above, and: a silo, which is connected to the feed pipe; an upper die group, which includes an upper die base and an upper die, the upper die is located above the upper die base, the quantitative piece is fixed on the upper die base, the upper die base is provided with a through upper die hole corresponding to the discharge hole, and the upper die can move up and down in the discharge hole and the upper die hole; a lower die group, which includes a lower die base and a lower die, the lower die is located below the lower die base, a concave die is fixed on the lower die base, and when feeding, the material storage hole is connected with the cavity of the concave die through the discharge hole, and the lower die can move up and down in the cavity.

[0017] Preferably, it also includes an upper mold cover that cooperates with the female mold, the female mold has a cavity, a convex block is arranged on the upper part of the female mold, a groove is arranged on the convex block, and a convex position corresponding to the convex block and the groove is arranged on the upper mold cover.

[0018] After adopting the above technical solution, the utility model has the following beneficial effects:

[0019] 1. Set a certain amount of parts, and set a metering hole on the quantitative part. The size of the metering hole is preset according to the actual material amount of the product. The feeding amount each time can be slightly more than the actual material amount, and then the excess material is scraped off through the scraper end on the feeding part or the feeding part. This can ensure that the feeding amount is accurate each time and can meet the production of components with higher specifications.

[0020] 2. The structure is simpler, which simplifies the work process, reduces equipment costs and improves feeding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and other purposes, features and advantages of the present invention will become more apparent through the detailed description of the preferred embodiments of the present invention shown in the accompanying drawings. The same reference numerals in all the accompanying drawings indicate the same parts, and the drawings are not deliberately scaled to the actual size, but the focus is on illustrating the subject matter of the present invention.

[0022] Figure 1 This is a schematic diagram of the structure of the powder forming machine of the utility model;

[0023] Figure 2 It is a three-dimensional structural schematic diagram of the powder forming machine of the utility model;

[0024] Figure 3 It is a structural diagram of the quantitative powder feeding mechanism of the utility model (including the upper and lower module structures);

[0025] Figure 4 This is a schematic diagram of the structure of the quantitative powder feeding mechanism of the utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the feeding rack of the utility model;

[0027] Figure 6 This is a bottom view of the feeding rack of the utility model;

[0028] Figure 7 for Figure 6 Partial schematic diagram of the middle scraper end;

[0029] Figure 8 It is a structural schematic diagram of the quantitative component of the utility model;

[0030] Fig. 9 It is a cross-sectional view of the quantitative member of the utility model;

[0031] Fig.10 The schematic diagram of the partial structure of the upper and lower modules of the utility model Figure 1 ;

[0032] Fig.11 The schematic diagram of the partial structure of the upper and lower modules of the utility model Figure 2 ;

[0033] Fig.12 for Fig.11 sectional view of;

[0034] Fig.13 It is a structural diagram of the lower module of the utility model.

[0035] Figure numerals: 1. feeding arm; 11. feeding rack; 12. rotating shaft; 2. feeding piece; 21. feeding pipe; 22. discharge hole; 23. recessed portion; 24. scraping end; 241. scraper; 242. scraping; 3. feeding piece; 31. storage hole; 4. quantitative piece; 41. quantitative hole; 42. pushing piece; 43. discharge hole; 44. trough; 45. detection element; 5. silo; 6. upper die assembly; 61. upper die seat; 62. upper die; 63. upper die cover; 631. convex position; 7. lower die assembly; 71. lower die seat; 72. lower die; 73. concave die; 731. cavity; 732. convex block; 733. groove. DETAILED DESCRIPTION

[0036] The technical solution of the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the utility model and implement it, but the embodiments are not intended to limit the utility model.

[0037] The utility model provides a quantitative powder feeding mechanism for a powder forming machine, which is used to feed powder to the powder forming machine. The function of the powder forming machine is to press and form powder products, so the amount of powder during pressing is directly related to the specifications of the finished product. For components with stricter requirements, the allowed specification error is very small, which requires the accuracy of the powder feeding amount each time. However, there is currently no good way to strictly control the powder feeding amount. It is very difficult to directly detect the amount of material discharged from the feeding pipe each time, and the error of the detection result is large. By adding a quantitative hole, the material is first fed into the quantitative hole each time, and then the powder in the quantitative hole is transferred to the die. Although the feeding amount can be controlled more accurately. However, there are also certain error problems. For components with more stringent requirements, the requirements cannot be met because the feeding error makes it impossible to ensure that it is filled or filled to a certain scale position each time. Even if the filling is filled to a preset position each time, the top of the powder is not flat and has a bulge, so the feeding amount each time will also have an error. This application defines the die direction as the front and the feeding arm direction as the rear.

[0038] refer to Figure 1-13 The quantitative powder feeding mechanism provided by the utility model includes: a feeding arm 1, the feeding arm 1 is connected to a feeding frame 11, the feeding arm 1 can be driven by a cylinder or a motor, and then the feeding arm 1 can drive the feeding frame 11 to move. The quantitative powder feeding mechanism also includes a feeding member 2, the feeding member 2 is located on the feeding frame 11, the feeding member 2 is connected to a feeding pipe 21 for conveying powder, the feeding member 2 has a recessed portion 23 at the bottom, the recessed portion 23 is provided with a feeding hole 22 connected to the feeding pipe 21, which is convenient for feeding and can accommodate powder, and the powder falls from the feeding hole 22 through the feeding pipe 21; the quantitative powder feeding mechanism also includes a fixed amount member 4, which is located above the die 73 and is used to control the feeding amount each time. The fixed amount member 4 is also located on the feeding frame 11, and the fixed amount member 4 is provided with a fixed amount hole 41 and a pushing member 42 that can move in the fixed amount hole 41. The capacity of the dosing hole 41 is preset according to the size of the component to be formed. The dosing hole 41 can be a standard shape such as a circle or a square, which is convenient for calculating the capacity. The amount of powder that fills the dosing hole 41 is the standard amount. When feeding, the discharge hole 22 transports the powder into the dosing hole 41 and fills the dosing hole 41. In order to ensure that the dosing hole 41 is filled to the same degree each time, the discharge amount can be controlled to slightly exceed the standard amount each time, and some powder will overflow outside the dosing hole 41.

[0039] The quantitative powder feeding mechanism also includes a feeding member 3, which can move on the quantitative member 4. The feeding member 3 and the quantitative member 4 cooperate with each other, and the contact surfaces of both sides can be mirror-finished to reduce friction resistance. The feeding member and the quantitative member may not contact each other, and a certain gap is also possible, but it is preferred to contact each other, which will reduce the powder from entering between the matching surfaces of the two. The feeding member 3 and / or the feeding member 2 are provided with a scraper end 24 that cooperates with the quantitative member 4. The scraper end 24 can be a separate component, or it can be the lower edge of the feeding member 3 or the feeding member 2, which is used to scrape off the excess powder above the dosing hole 41. The direction of the die 73 is defined as the front, and the direction of the feeding arm 1 is defined as the rear.

[0040] The feed piece 2 and the feeding piece 3 are both located on the feeding rack 11, and are both rotatably connected to the feeding rack 11. The feeding rack 11 moves forward and backward to press and drive the feed piece 2 and the feeding piece 3 to move back and forth on the quantitative piece 4. The feed piece 2 and the feeding piece 3 can be connected to the feeding rack 11 by a rotating shaft 12. The first purpose of the rotating connection is to better match the surface of the quantitative piece 4. If it is fixed, it is easy to cause a gap between the matching surfaces after wear. The second purpose is to facilitate the removal of excess powder. Some powder will accumulate under the feeding piece 3 and the feed piece 2, which can be more conveniently cleaned by rotation. The third purpose is that the feed piece 2 can be rotated to better cooperate with the metering hole 41. Because the feed pipe 21 generally has a certain inclination, and when a recessed portion 23 is set under the feed piece 2, the front is the scraper end 24, and the rear can be rotated to a certain angle and then fixed, that is, the scraper end 24 is not needed at the rear, but a material trough 44 is needed at the rear of the metering piece 4. The rear end of the feed piece 2 and the metering piece 4 can have a certain gap, so as to adjust the angle of the feed hole relative to the metering hole 41, so as to achieve the purpose of better filling the metering hole 41 and reduce overflow of powder.

[0041] One situation is that both the feed piece 2 and the feeding piece 3 are located on the feeding frame 11, the feed piece 2 is at the back and the feeding piece 3 is at the front. First, the feed piece 2 moves to the position of the fixed material hole 41 to fill the fixed material hole 41, and then the feeding frame 11 is pulled back. At this time, the rear end of the feeding piece 3 is set as the scraper end 24, and the excess material powder outside the fixed material hole 41 is hung to the back. When it moves to the point where the storage hole 31 is connected with the quantitative hole, the fixed material hole 41 cooperates with the storage hole 31, and the pushing piece 42 pushes the material powder in the fixed material hole 41 into the storage hole 31, and the feeding piece 3 pushes the material powder into the mold cavity 731, which can ensure that the material powder in the storage hole 31 is the standard amount. It should be noted that at this time, the scraper end 24 will not protrude from the storage hole 31, that is, no gap can be formed between the storage hole 31 and the quantitative piece 4, and the edge of the bottom of the feeding piece 3 can be set as the scraper end 24.

[0042] In another case, a scraper end 24 is provided below the feed member 2. In this case, the scraper end 24 can be a separate component, or the protruding edge of the recessed portion 23 of the feed member 2 can be provided as the scraper end 24. The lower portion of the feed member 2 is provided with a recessed portion 23, and the front portion of the recessed portion 23 is provided as the scraper end 24. When the feeding arm 1 is pulled back, the front end of the feed member 2 scrapes away the excess powder, and the amount of powder in the fixed material hole 41 can be ensured to be constant each time. It is certain that, at this time, the rear end of the feed member 2 can also be provided as the scraper end 24, that is, both ends of the feed member 2 are scraper ends 24, so that the excess powder can be scraped forward when the next stroke advances, and part of the powder is scraped into the fixed material hole 41, thereby achieving the effect of recycling. At this time, most of the excess powder will be located in the recessed portion 23 at the lower portion of the feed member 2, and the powder outside the recessed portion 23 can be scraped away by the scraper end 24 on the feed member 3. That is, the scraper end 24 can be provided on the feeding member 3 alone, or provided on the front end and / or rear end of the feeding member 2 alone, or provided on both the feeding member 3 and the feeding member 2 at the same time, so as to scrape off the excess powder and realize the effect of quantitative powder feeding. It should be noted that the scraper end 24 not only has the function of scraping off the excess powder, but also has the function of scraping the powder in the fixed material hole 41 flat.

[0043] The quantitative member 4 is provided with a trough 44 for storing excess powder in cooperation with the scraper end 24. The trough 44 is arranged behind the quantitative hole 41, that is, behind the feeding stroke of the feeding member 3. Of course, it can also be arranged in front, in which case it needs to be arranged in front of the discharge hole 43. In this case, the scraper needs to move a long distance and then pull back to transport the powder, which is less efficient. The trough 44 can be set to two or more, which is more conducive to scraping the powder. In the above embodiment, especially in the case where only the scraper end 24 is provided below the feeding member 3, since most of the excess powder will be pushed between the feeding member 3 and the feed member 2 by the scraper end 24, although it can also satisfy the purpose of scraping away the excess powder outside the metering hole 41 and basically not affecting the reciprocating stroke, further, a blowing structure can be added to blow the excess powder to the waste hopper below after scraping, but the effect is not very good. For this reason, on the metering member 4, it is preferred to open a material trough 44 behind the metering hole 41, so that when the feeding arm 1 is pulled back, the scraper end 24 of the feeding member 3 or the feed member 2 can scrape the excess waste into the material trough 44, and further, a blowing device can be provided on one side of the material trough 44, and the blowing air outlet (not shown) blows the powder in the material trough 44 to the hopper below for recycling. Of course, a material brush can also be provided. At a preset time, such as when the material trough 44 is almost full, a movable material brush can be used to clean the material powder in the material trough 44 to the hopper below. The material brush is also a relatively common structure. By providing a cylinder or a motor, a brush handle and a brush head can be driven to move in the material trough 44. The structure is not described in detail here. As another preferred embodiment, the material trough 44 can be provided as a through trough, so that the scraping end 24 can directly scrape off the excess material powder. A material box or a material bag (not shown) is connected below the material trough 44, so there is no need to provide a material brush or a blowing vent, and there is no need to clean the material trough 44 frequently.

[0044] The bottom of the feeding member 2 has a recessed portion 23, i.e., a groove. The feeding hole 22 is opened in the recessed portion 23. At least one side of the front and rear edges of the recessed portion 23 is set as a scraper end 24. The side of the front and rear edges where the scraper end 24 is set determines the moving direction of the feeding member after feeding. For example, if a scraper is set at the rear side, then after feeding, it moves forward and scrapes the excess powder into the material trough 44 in front. The setting position of the scraper end 24 is determined by the moving direction after feeding and the position of the material trough 44. In addition, regardless of the position and moving direction of the material trough 44, the front and rear ends can be set as the scraper end 24 at the same time.

[0045] It should be noted that when a scraper end 24 is provided under the feed piece 2, it is not necessary to provide a material trough 44. Excess powder will be scraped back and forth by the front and rear scraper ends 24 under the feed piece 2. When there is a lot of excess powder, when the feed piece 2 moves to the unloading position, a considerable portion of the powder will be scraped into the fixed material hole 41 again. Therefore, there will be no problem of excessive powder under the feed piece 2.

[0046] When the scraper end 24 is a separate component, a mounting groove can be provided at the bottom of the feed member 2, and the scraper end 24 is installed in the mounting groove, and the scraper end 24 is a flexible component. The scraper end 24 is a separate component, so it can be replaced, and the scraping effect of the flexible component is better. Further, the scraper end 24 includes a flexible scraper 241 and scraper bristles 242, and the scraper 241 is set in a cone shape with a thick top and a thin bottom, and the scraper bristles 242 are located on both sides of the scraper 241 and protrude from the scraper 241. Note that if the feed member 3 is also provided with a separate scraper end 24, the entire bottom of the feed member 3 can only be set as the scraper end 24, because the storage hole 31 cannot form a gap with the quantitative member 4. When feeding or scraping, the feed arm 1 is pressed down, the bristles are deformed, and the scraper 241 contacts the quantitative member 4. The scraper 241 not only scrapes the material, but also has a sealing effect, and the bristles can better clean the material powder.

[0047] In a preferred embodiment, the quantitative member 4 is in the shape of a plate, the quantitative hole 41 is arranged on the side close to the feeding arm 1, and the discharge hole 43 cooperating with the storage hole 31 is arranged on the side away from the feeding arm 1. Specifically, it can be a plate with a flat surface. The lower part of the feeding member 2 and the feeding member 3 is also arranged to be flat, and both can be subjected to mirror processing. The powder enters the cavity 731 of the concave mold 73 through the discharge hole 43. The feeding member 3 is directly pushed on the quantitative member 4. After the pushing member 42 pushes the quantitative powder into the storage hole 31, that is, after the storage hole 31 is completely separated from the quantitative hole 41, the pushing member 42 can go down and push the feeding member 3. The upper surface of the quantitative member 4 seals the bottom of the storage hole 31. When the storage hole 31 and the discharge hole 43 are connected, the powder falls directly into the cavity 731 of the concave mold 73.

[0048] In a preferred embodiment, a detection element 45 for detecting the position of the pusher 42 is provided in the metering hole 41. In the case where the metering hole 41 is filled to reach the standard amount, the detection element 45 does not need to be provided, and the quantitative effect can be achieved. It is certain that the pusher 42 has an initial standard position, such as a position that is exactly flush with the bottom of the metering hole 41. However, in the case where the standard amount cannot be filled, there are two ways to deal with it. The first is to raise the pusher 42 until the standard amount just fills the metering hole 41 as the initial standard position; the other is that because the metering hole 41 is a standard shape, the amount of powder can be controlled by detecting the position of the powder. When it is detected that the powder reaches the preset position, the feeding is stopped. Of course, at this time, the amount of the material can be relatively accurate. Although the top of the powder is irregular and the actual amount will be less, there will be a certain amount of powder falling due to a certain delay in stopping. In this way, the two complement each other and there will not be too much error. A through hole is provided inside the quantitative member 4, and the through hole passes through the dosing hole 41. A detection element 45 is provided at the inner edge of the dosing hole 41 in the through hole. The detection element 45 can be a thermal or optical component, such as an infrared detection element. Of course, the size of the through hole matches the shape of the detection element 45, and the outer edge of the detection element 45 matches the shape of the dosing hole 41, so as to minimize the impact on the capacity of the dosing hole 41. In order to further improve the detection accuracy, multiple groups of detection elements 45 can be provided above and below. Since the principle of the detection element 45 is a common technical means, it can be easily obtained by skilled technicians, and will not be described in detail here.

[0049] The present application also provides a powder forming machine, including the above-mentioned feeding mechanism, the feeding mechanism includes a feeding arm 1, the feeding arm 1 is connected to a feeding rack 11; a feeding piece 2, located on the feeding rack 11, the feeding piece 2 is connected to a feeding pipe 21 for conveying powder, and a discharge hole 22 connected to the feeding pipe 21 is provided on the feeding piece 2; a fixed amount piece 4, located on the feeding rack 11, the fixed amount piece 4 is provided with a fixed hole 41 and a pushing piece 42 movable in the fixed hole 41, when feeding, the discharge hole 22 conveys the powder to the fixed hole 41, and is also provided with a A discharge hole 43 is provided; a feeding piece 3 cooperates with the quantitative piece 4 and can move on the quantitative piece 4, and is provided with a storage hole 31 that cooperates with the quantitative hole 41; the feeding piece 3 and / or the feed piece 2 are provided with a scraper end 24 that cooperates with the quantitative piece 4, which is used to scrape off excess material powder above the quantitative hole 41, and then the pushing piece 42 pushes the material powder in the quantitative hole 41 into the storage hole 31, and the feeding piece 3 pushes the material powder to the position of the discharge hole 43 so that it falls into the cavity 731 of the die 73 below. The principle of the feeding mechanism is shown in the above description of the manual and will not be described in detail here. The molding machine also includes a silo 5, which is used to hold powder raw materials. The silo 5 is connected to the feed pipe 21, that is, the silo 5 and the feed piece 2 are connected through the feed pipe 21; an upper die group 6, which includes an upper die base 61 and an upper die 62, and the upper die 62 is located above the upper die base 61 and is driven by a power mechanism to move up and down. The upper die 62 can also be referred to as an upper die punch, and the quantitative member 4 is fixed on the upper die base 61; a lower die group 7, which includes a lower die base 71 and a lower die 72, and the lower die 72 is located below the lower die base 71 and is driven by a power mechanism to move up and down. The lower die 72 can also be referred to as a lower die punch, and a concave die 73 is fixed on the lower die base 71, and the concave die 73 has a cavity 731. When feeding, the material storage hole 31 is connected with the cavity 731 of the concave die 73 through the discharge hole 43. The upper die seat 61 is provided with a through upper die hole (not shown) corresponding to the discharge hole 43, the upper die 62 can move up and down in the discharge hole 43 and the upper die hole, and the lower die 72 can move up and down in the cavity 731. During the pressing operation, the upper die 62 can penetrate the discharge hole 43 and the upper die hole and then enter the cavity 731 to cooperate with the lower die 72 to complete the stamping.

[0050] In a preferred embodiment, it further comprises an upper die cover 63 cooperating with the die 73, the die 73 having a cavity 731, a convex block 732 disposed on the upper portion of the die 73, a groove disposed on the convex block 732, and a convex position 631 corresponding to the convex block 732 and the groove disposed on the upper die cover 63. Since the pressure during stamping is very large, it is easy for the die or punch to shake. In order to reduce the shaking, the upper die cover 63 cooperates with the die 73 to prevent displacement during stamping and play a fixing role. Of course, the upper die cover 63 is also provided with a through hole for the upper die 62 to pass through and cooperate with the die 73. During stamping, the upper die 62 passes through the quantitative member 4, the upper die seat 61 and the upper die cover 63, and then enters the cavity 731 of the lower die 73, and cooperates with the lower die 72 to stamp each other.

[0051] It should be noted that there may be a gap between the feed member 2 and the metering member 4, or they may contact each other, the scraper end 24 may be set at the bottom of the feed member 2 or the feeding member 3, or both, and the position of the material trough 44 may be opened between the metering hole 41 and the discharge hole 43, or between the metering hole 41 and the feeding rack 11. All of them can achieve the purpose of this application, and all of them belong to the protection scope covered by the technical scope of this application. It is only necessary to reasonably configure the position or movement procedure according to the relationship between the above-mentioned features, and this specification will no longer describe each situation in detail.

[0052] The general working process of the powder forming machine of the present application is as follows: the feeding arm 1 moves to the unloading position, and the powder in the hopper 5 falls into the metering hole 41 of the metering member 4 from the unloading hole 22 located in the recessed part 23 of the feeding member 2 through the feeding pipe 21. The powder is slightly excessive, so the excess powder will overflow the metering hole 41. The feeding arm 1 is pulled back to perform the scraping and transfer quantitative powder procedure. The powder in the metering hole 41 is scraped flat through the scraping end 24 at the bottom of the feeding member 2 and / or the feeding member 3, and the excess powder can be scraped away and scraped to the metering hole 4. 1 and then falls into the material bag below. The material trough 44 can also be set as multiple strips. When the feeding member 3 is pulled back and moved until its storage hole 31 and the fixed material hole 41 are connected, the pulling back is stopped, and the pushing member 42 pushes the powder in the fixed material hole 41 into the storage hole 31. The feeding arm 1 is pushed forward, and the feeding member 3 moves to the storage hole 31 and the discharge hole 43 are connected. The powder falls into the cavity 731 of the concave die 73 below, and the feeding arm 1 returns to the initial feeding position. The punches of the upper and lower dies stamp and form the powder in the cavity 731 of the concave die 73.

[0053] The feeding piece 3 and the feed piece 2 are both arranged on a feeding rack 11, with the feed piece 2 at the back and the feeding piece 3 at the front, and a scraper end 24 is arranged at the bottom of the feed piece 2 and the feeding piece 3, and the feeding piece 3 and the feed piece 2 are directly matched with the fixed hole 41, the feeding and scraping strokes are integrated, and the material transfer and feeding strokes are integrated. For example, when feeding, the feeding rack 11 moves forward, the discharge hole 22 is connected with the fixed hole 41 for feeding, and then the feeding rack 11 is pulled back, not only for the material storage hole 31 of the feeding piece 3 and the fixed hole 41 to be connected for transferring the material powder, but also for the scraping end 24 at the bottom of the feeding piece 3 and the feeding piece 2, and the two processes are completed in one. A recessed portion 23 is intentionally provided at the bottom of the feed piece 2 of the present patent, and a discharge hole 22 connected to the feed pipe 21 is provided in the recessed portion 23, so that the discharge hole 22 of the feed pipe 21 can be made smaller than the metering hole 41, and the discharge hole 22 can extend from the recessed portion 23 as close to the top of the metering hole 41 as possible, which not only ensures that the discharge hole 22 can accurately discharge the powder into the metering hole 41 to reduce external scattering, but the recessed portion 23 can also accommodate the tip of the powder protruding from the metering hole 41, further reducing the overflow of the powder to the outside of the metering hole 41 and ensuring the accurate quantitative measurement of the powder after scraping.

[0054] The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention. The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A quantitative powder feeding mechanism for a powder forming machine, used for feeding powder to a concave die of a powder forming machine, characterized in that: include: A feeding arm (1), wherein the feeding arm (1) is connected to a feeding frame (11); A feeding member (2) is located on the feeding frame (11), the feeding member (2) is connected to a feeding pipe (21) for conveying powder, the bottom of the feeding member (2) has a recessed portion (23), and a feeding hole (22) communicating with the feeding pipe (21) is arranged in the recessed portion (23); A dosing member (4) can be installed above the concave die of the powder forming machine. The dosing member (4) is provided with a dosing hole (41) of a preset capacity and a pushing member (42) that can move in the dosing hole (41). The dosing member (4) is also provided with a discharge hole (43). When feeding, powder exceeding the preset capacity enters the dosing hole (41) through the discharge hole (22); A feeding member (3) is located on the feeding frame (11), cooperates with the quantitative member (4) and can move on the quantitative member (4), and is provided with a storage hole (31) that cooperates with the quantitative hole (41). The bottom of the feeding member (3) and the bottom of the feeding member (2) are provided with a scraping end (24) that cooperates with the quantitative member (4) and is used to scrape off excess material powder above the quantitative hole (41). The pushing member (42) pushes the material powder in the quantitative hole (41) into the storage hole (31), and the feeding member (3) pushes the material powder to the position of the discharge hole (43) so that the powder falls into the concave mold cavity below. The feed piece (2) and the feeding piece (3) are both located on the feeding rack (11) and are rotatably connected to the feeding rack (11), with the feed piece (2) being at the rear and the feeding piece (3) being at the front, and the feeding arm (1) being rotatably connected to the feeding rack (11).

2. The quantitative powder feeding mechanism of the powder forming machine according to claim 1, characterized in that: The metering member (4) is provided with a non-through material trough (44) for collecting excess material powder in cooperation with the scraping end (24); the material trough (44) is located behind the metering hole (41) and has at least two troughs; a material brush or a material blowing vent for cleaning excess material powder in the material trough (44) is also provided.

3. The quantitative powder feeding mechanism of the powder forming machine according to claim 1, characterized in that: The metering member (4) is provided with a through material groove (44) cooperating with the scraping end (24); the material groove (44) is located behind the metering hole (41); and a material box or a material bag is connected below the material groove (44).

4. The quantitative powder feeding mechanism of the powder forming machine according to claim 1, characterized in that: The bottom of the feeding member (2) is provided with a mounting groove, in which the scraping end (24) is mounted, and the scraping end (24) is a flexible member.

5. The quantitative powder feeding mechanism of the powder forming machine according to claim 1, characterized in that: The scraper end (24) comprises a flexible scraper plate (241) and scraper bristles (242); the scraper plate (241) is arranged in a conical shape with a thick top and a thin bottom; the scraper bristles (242) are located on both sides of the scraper plate (241) and protrude from the scraper plate (241).

6. The quantitative powder feeding mechanism of the powder forming machine according to claim 1, characterized in that: The feeding member (3) is located in front of the feeding member (2); a scraper end (24) is provided at least on one side of the front and rear of the recessed portion (23); the quantitative member (4) is in the shape of a plate; the quantitative hole (41) is provided on the side close to the feeding arm (1); and the discharge hole (43) cooperating with the storage hole (31) is provided on the side away from the feeding arm (1).

7. The quantitative powder feeding mechanism of the powder forming machine according to claim 1, characterized in that: A detection element (45) for detecting the position of the material pushing member (42) is arranged in the material setting hole (41).

8. A powder forming machine, characterized in that: The invention comprises the quantitative powder feeding mechanism of the powder forming machine as claimed in claim 1, and: a silo (5), the silo (5) being in communication with the feed pipe (21); an upper die assembly (6), the upper die assembly (6) comprising an upper die seat (61) and an upper die (62), the upper die (62) being located above the upper die seat (61), the quantitative member (4) being fixed on the upper die seat (61), the upper die seat (61) being provided with a through upper die hole corresponding to the discharge hole (43), the upper die (62) being movable up and down in the discharge hole (43) and the upper die hole; A lower die assembly (7), the lower die assembly (7) comprising a lower die base (71) and a lower die (72), the lower die (72) being located below the lower die base (71), a concave die (73) being fixed on the lower die base (71), the concave die (73) having a cavity (731), when feeding, the material storage hole (31) is connected with the cavity (731) of the concave die (73) through the discharge hole (43), and the lower die (72) can move up and down in the cavity (731).

9. The powder forming machine according to claim 8, characterized in that: It also includes an upper mold cover (63) that cooperates with the concave mold (73), the upper part of the concave mold (73) is provided with a convex block (732), the convex block (732) is provided with a concave groove (733), and the upper mold cover (63) is provided with a convex position (631) corresponding to the convex block (732) and the concave groove.

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