Easily-demoulded forming structure of powder forming machine

Abstract

The utility model relates to the field of powder forming machines, and discloses an easy-to-demould forming structure of a powder forming machine, which comprises a mould frame, an upper module in sliding connection with the mould frame and an upper mounting seat, and an upper punching mould is matched with an upper concave part; the lower die set comprises a lower mounting seat which is in sliding connection with the die frame, and a lower punching die is matched with the lower concave part; the upper female die is slidably and elastically connected with the upper mounting seat, the upper demolding ejector rod can push the upper female die to move, and / or the lower female die is slidably and elastically connected with the lower mounting seat, and the lower demolding ejector rod can push the lower female die to move. In the demolding process, the punch is kept at the punching position, the ejector rod structure pushes the female die to demold, and the formed part is still in the state of being jacked by the punch, so that the female die does not adhere to the formed part during movement, demolding is easier, and the formed part is not prone to being damaged or forming burrs. In addition, due to elastic stretching of the female die, the upper die and the lower die do not need independent power assemblies any more, and the equipment structure and the manufacturing cost are reduced.

Description

Technical Field

[0001] The utility model relates to the field of powder forming machines, in particular to an easy-to-release forming structure of a powder forming machine. Background Art

[0002] Powder pressing is a basic process in powder metallurgy production. Its purpose is to make loose powder into semi-finished or finished products with predetermined geometric shape, size, density and strength. Among them, the most common way of powder forming is powder extrusion forming, which uses a powder pressing machine to rely on the pressure of the punch to squeeze the metal powder in the die through an extrusion die with the same cross-sectional size and shape as the product to form a dense rod or part. After pressing, the punch is detached and then the molded part and the die are separated. However, due to the certain adhesion between the molded part and the die, especially the hot pressing machine, the edge of the molded part will be damaged during demolding. Traditional molding machines reduce this adhesion by changing the material and surface treatment of the die, or use a pin structure. The cost of specially treated die materials and surface treatment is relatively high. The pin structure is not only expensive but also more complex. Utility Model Content

[0003] Based on the deficiencies of the prior art, the utility model provides an easy-to-demold forming structure of a powder forming machine.

[0004] A mold-ejecting molding structure for a powder molding machine, comprising: a mold frame, an upper mold group slidably connected to the mold frame, comprising: an upper mounting seat slidably connected to the mold frame, an upper punch and an upper concave mold assembled on the upper mounting seat, and the upper punch cooperates with the upper concave mold; a lower mold group slidably connected to the mold frame, comprising: a lower mounting seat slidably connected to the mold frame, a lower punch and a lower concave mold assembled on the lower mounting seat, and the lower punch cooperates with the lower concave mold; the upper concave mold slides and is elastically connected to the upper mounting seat, and also includes an upper demolding ejector rod that can push the upper concave mold to move, and / or the lower concave mold slides and is elastically connected to the lower mounting seat, and also includes a lower demolding ejector rod that can push the lower concave mold to move.

[0005] Preferably, the upper mounting seat is slidably connected to the mold frame via a first guide column, the upper die is slidably connected to the upper mounting seat via a second guide column, a first elastic member is provided between the upper die and the upper mounting seat, and during the pressing process, the upper die slides upward and pushes against the first elastic member.

[0006] Preferably, the upper die comprises a cavity die and a connecting plate, the connecting plate is fixedly connected to at least two of the second guide pillars, and two adjacent second guide pillars are connected by a T-block on a side away from the connecting plate.

[0007] Preferably, four second guide pillars are provided, the first elastic member is a spring, four spring mounting holes are provided on the upper mounting seat, one end of the spring is fixed in the mounting hole, and the lower end contacts the upper concave mold.

[0008] Preferably, the upper punch die comprises an upper punch head and an upper punch plate, the upper punch plate is fixedly connected to the upper mounting seat, and the connecting plate is provided with a guide groove matching the shape of the upper punch plate.

[0009] Preferably, the lower die is slidably connected to the first guide column, and the lower punch is fixedly mounted on a fixed plate. When the lower die slides downward, the lower punch can move up and down in the cavity of the lower die.

[0010] Preferably, the lower die is fixedly connected to a first connecting rod passing through the fixed plate, and a push rod mounting plate is slidably connected to the first connecting rod. The upper demoulding push rod is fixed on the push rod mounting plate, and the push rod mounting plate is connected to a second connecting rod on the side away from the lower die. By pulling the second connecting rod to drive the push rod mounting plate, the upper demoulding push rod can be pushed out of or retracted from the lower die.

[0011] Preferably, the upper die is provided with a pressing hole corresponding to the upper demoulding ejector rod, a vibration protrusion at a preset position is provided in the pressing hole, and the upper demoulding ejector rod is provided with a concave position matching with the vibration protrusion, the vibration protrusion is arc-shaped up and down, and the periphery of the concave position is arc-shaped and inclined.

[0012] Preferably, a second elastic member and a third guide column are provided between the lower concave die and the lower mounting seat, the second elastic member is sleeved outside the third guide column, and the lower demoulding ejector rod passes through the upper mounting seat and cooperates with the lower concave die.

[0013] The present application also provides a powder forming machine, including a shell, a feeding structure, a unloading structure and the easy-to-demold forming structure of the powder forming machine described above, wherein the feeding structure can move on the lower die and convey powder to it, and the unloading structure is used to remove the formed part from the lower die.

[0014] The easy demoulding structure provided by the present application is that after the pressing and forming, the die structure is elastically retractable. During demoulding, the punch maintains the stamping position, and the ejector structure pushes the die to demould. Since the molded part is still in the state of being pressed by the punch, the movement of the die will not stick to the molded part, making it easier to demould and the molded part is not easy to be damaged or burred. In addition, due to the elastic expansion and contraction of the die, the upper and lower dies no longer need separate power components, reducing the equipment structure and manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and other purposes, features and advantages of the present invention will become clearer through a more specific description of the preferred embodiments of the present invention shown in the accompanying drawings. The same reference numerals indicate the same parts in all the accompanying drawings, and the accompanying drawings are not deliberately scaled to the actual size, but the focus is on illustrating the main purpose of the present invention.

[0016] Figure 1 This is a three-dimensional diagram of the easy-to-demold molding structure of this application.

[0017] Figure 2 for Figure 1 Section view along AA direction.

[0018] Figure 3 This is a three-dimensional diagram of the module of this application.

[0019] Figure 4 for Figure 2 Section view along BB direction.

[0020] Figure 5 This is a bottom view of the module for this application.

[0021] Figure 6 This is an exploded view of the upper punch and upper die of this application.

[0022] Figure 7 This is a three-dimensional diagram of the module under this application.

[0023] Figure 8 for Figure 7 Section view along CC direction.

[0024] Fig. 9 This is an exploded view of the lower punch and lower die for this application.

[0025] In the figure: 1. mold frame; 11. first guide column; 2. upper mold assembly; 21. upper mounting seat; 22. upper punch; 221. upper punch; 222. upper punch plate; 23. upper die; 231. cavity mold; 232. connecting plate; 2321. guide groove; 233. top pressure hole; 24. upper demoulding ejector pin; 25. second guide column; 26. first elastic member; 27. T-block; 3. lower mold assembly; 31. lower mounting seat; 32. lower punch; 321. lower punch; 322. lower punch plate; 33. lower die; 34. fixing plate; 35. first connecting rod; 36. ejector mounting plate; 37. second connecting rod; 38. lower seat plate. DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the relevant drawings.

[0027] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to another element and integrated therewith, or there may be an intermediate element at the same time. The terms "installed", "one end", "the other end" and similar expressions used herein are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art. The terms used in the specification herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0029] An easy demoulding molding structure of a powder molding machine is installed in the shell of the molding machine and is used for pressing and demoulding the molded parts. The mold frame 1 is used for installing and fixing the die, punch and power assembly. The mold frame 1 includes a first guide column 11 and a connecting arm. The mold frame 1 is slidably connected to an upper mold group 2, and the upper mold group 2 includes an upper mounting seat 21, which is slidably connected to the first guide column 11 of the mold frame 1, and an upper punch 22 and an upper die 23 are mounted on the upper mounting seat 21, and the upper punch 22 cooperates with the upper die 23; a lower mold group 3 is slidably connected to the mold frame 1, and the lower mold group 3 includes a lower mounting seat 31, which is slidably connected to the mold frame 1, and a lower punch 32 and a lower die 33 are mounted on the lower mounting seat 31, and the lower punch 32 cooperates with the lower die; the upper die 23 is slidably and elastically connected to the upper mounting seat 21, and also includes an upper demolding ejector rod 24 that can push the upper die 23 to move, and / or the lower die 33 is slidably and elastically connected to the lower mounting seat 31, and also includes a lower demolding ejector rod that can push the lower die 33 to move. It should be noted that the upper punch 22 and the lower punch 32 can be set so that one of them is fixed, that is, only one punch moves to press during stamping, and since the die can be elastically retractable, the relative position of the die and the upper punch 22 will change when the die is retracted, so the upper and lower dies 32 do not need to be provided with separate power components. Of course, if both the upper punch 22 and the lower punch 32 are provided with separate power components, the stamping effect will be better, but the cost is higher and the structure is more complicated. During demoulding, the punch maintains the stamping position, and the ejector structure pushes the die to demould. Since the molded part is still in a state of being pressed by the punch, the movement of the die will not adhere to the molded part, making it easier to demould and the molded part is not easy to cause damage or form burrs. That is, the scope of disclosure of this specification includes three embodiments, the upper die 23 is elastically retractable, the lower die 33 is elastically retractable, and both can be elastically retractable. All three embodiments can achieve the effect of easy demoulding and not easy to damage the molded parts. Both of them can be elastically retracted. Since the upper and lower dies 33 have a certain pressure to close the mold, the elastic part is required to have a certain rigidity. Both the upper and lower dies 33 have a certain elastic retractable stroke, which makes demoulding easier. This specification takes the elastic retractability of the upper die 23 as an example to illustrate that the elastic retractable structure of the lower die 33 is basically the same as the elastic retractable principle structure of the upper die 23. A second elastic part and a third guide column are provided between the lower die 33 and the lower mounting seat 31. The second elastic part is sleeved outside the third guide column. The lower demoulding ejector rod passes through the upper mounting seat 21 and cooperates with the lower die 33. The structure is basically the same as the elastic structure of the upper die 23, and will not be repeated here.

[0030] Further, the upper die 23 is provided with a pressing hole 233 corresponding to the upper demoulding ejector 24, a vibration protrusion at a preset position is provided in the pressing hole 233, a concave position matching the vibration protrusion is provided on the upper demoulding ejector 24, the vibration protrusion is arc-shaped up and down, and the periphery of the concave position is arc-shaped and inclined, when demoulding, the upper demoulding ejector 24 rises and enters the pressing hole 233, and touches the vibration protrusion and further pushes into the concave position, the first function is positioning, and another function is that at the moment when the vibration protrusion enters the concave position, due to the change of matching and position space, a vibration force mainly in the up and down direction will be generated on the upper die 23, and this vibration can achieve the effect of removing adhesion and preliminary demoulding, then, the upper demoulding ejector 24 rises further, touches the bottom of the pressing hole 233, and takes the upper die 23 away from the molded part. The setting of the concave position shape is to improve the vibration effect, and of course to facilitate the separation of the pressing rod and the pressing hole 233 during resetting. It should also be noted that the lower slope of the concave position can be set to be larger, so that it is easy to disengage when resetting, and the upper slope is larger, so that the upper demoulding push rod 24 pushes the upper die 23 to move through the resistance between the vibrating protrusion and the concave position.

[0031] In a preferred embodiment, the upper mounting seat 21 is slidably connected to the mold frame 1 through the first guide column 11, and the upper die 23 is slidably connected to the upper mounting seat 21 through the second guide column 25. A first elastic member 26 is arranged between the upper die 23 and the upper mounting seat 21. The first elastic member 26 can be sleeved outside the second guide column 25 or can be arranged separately. This embodiment is described by taking the separate arrangement as an example. The second guide column 25 can be arranged in four pieces. The first elastic member 26 is a spring. Four spring mounting holes are arranged on the upper mounting seat 21. One end of the spring is fixed in the mounting hole, and the lower end contacts the upper die 23. During the pressing process, the power mechanism drives the upper mounting seat 21 to move, thereby driving the upper die 23 to move downward together. When the upper die 23 and the lower die 33 are in contact and molded, the upper mounting seat 21 moves further downward, and the lower die 33 contacts the upper die 23, so that the upper die 23 slides upward and pushes against the first elastic member 26. The first elastic member 26 is compressed. Since the upper die 23 moves upward, the upper punch 22 moves downward relative to the upper die 23 to punch the powder in the cavity below. It should be noted that the lower die 32 is fixed at this time. The upper punch 22 does not need a separate power assembly, which will greatly reduce the equipment structure. It only needs to move a power assembly of the upper mounting seat 21. In another embodiment, after the mold is closed, the upper mounting seat 21 moves to a preset position and no longer moves. At this time, the upper punch 22 is moved by a separate power assembly to complete the pressing molding. After molding, the upper ejector rod 24 touches the upper die 23 to compress the first elastic member 26, so that the upper die 23 is demolded. At this time, the upper punch 22 is fixed and cooperates with the lower punch 32 to support the molded components, so that demolding is easy and there will be no flash or even damage. After successful demolding, the power assembly moves the upper mounting seat 21 or moves the upper punch 22 alone to start the unloading process. In this specification, the power assembly of the upper mounting seat 21 is defined as the first power assembly, and the power assembly of the upper punch 22 is positioned as the second power assembly (which may not be required).

[0032] In a preferred embodiment, the upper die 23 includes a cavity die 231 and a connecting plate 232, the connecting plate 232 is fixedly connected to the second guide pillar 25, and two adjacent second guide pillars 25 are connected by a T-block 27 on the side away from the connecting plate 232. The function of the T-block 27 is to connect and fix the upper ends of the two guide pillars, so that the center of the guide pillars is better and not easy to deviate, and to ensure the smooth up and down movement of the upper mounting seat 21. In addition, the T-block 27 has another important function, which is to limit the position. After the first elastic member 26 resets the upper die 23 to move downward, the T-block 27 contacts the upper mounting seat 21 through the protruding end of the body to achieve the limit. The upper punch die 22 includes an upper punch head 221 and an upper punch plate 222. The upper punch plate 222 is fixedly connected to the upper mounting seat 21. The connecting plate 232 is provided with a guide groove 2321 that matches the shape of the upper punch plate 222. The function of the guide groove 2321 is not only to provide a downward travel space for the upper punch die 22, but also to guide the movement of the upper punch die 22.

[0033] In a preferred embodiment, the lower die 33 is fixedly mounted on the lower mounting seat 31, and the lower die 33 is slidably connected to the first guide column 11 through the lower mounting seat 31. The power assembly of the lower mounting seat 31 is defined as the third power assembly, which drives the lower die 33 to slide up and down. The upper part of the lower punch 32 cooperates with the lower die 33. The lower punch 32 includes a lower punch 321 and a lower punch plate 322. The lower punch plate 322 is fixedly mounted on a fixed plate 34. When the lower die 33 slides downward, the lower punch 32 can move up and down in the cavity of the lower die 33. Of course, the lower punch 32 can also be provided with a separate power assembly, which is positioned as the fourth power assembly. In a preferred embodiment, the lower die 33 (or the lower mounting seat 31) is fixedly connected with a first connecting rod 35 that passes through the fixed plate 34. The first connecting rod 35 is fixedly connected to the lower seat plate 38. The third power assembly drives the lower mounting seat 31 as a whole to slide on the first guide column 11 by driving the lower seat plate 38. A push rod mounting plate 36 is slidably connected to the first connecting rod 35, and the upper demoulding push rod 24 is fixed on the push rod mounting plate 36. The push rod mounting plate 36 is connected to a second connecting rod 37 on the side away from the lower concave die 33, and the second connecting rod 37 is connected to the fifth power assembly. By pulling the second connecting rod 37 to drive the push rod mounting plate 36, the upper demoulding push rod 24 can be pushed out of or retracted from the lower concave die 33. It should be noted that the first connecting rod 35 not only provides a connecting rod function for the lower concave die 33, but also has a guide column function for the push rod mounting plate 36.

[0034] The present application also provides a powder forming machine, including a shell, a feeding structure, a unloading structure and the easy-to-demold forming structure of the powder forming machine described above, wherein the feeding structure can move on the lower die 33 and convey powder to it, and the unloading structure is used to remove the formed part from the lower die 33.

[0035] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, in addition, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which should be considered to be within the scope of this specification.

Claims

1. An easy-to-release molding structure of a powder molding machine, characterized in that: include, A mold frame (1), an upper die set (2) slidably connected to the die frame (1), include, An upper mounting seat (21) is slidably connected to the mold frame (1), and is assembled with an upper punch (22) and an upper die (23) on the upper mounting seat (21), wherein the upper punch (22) and the upper die (23) cooperate with each other; A lower mold assembly (3) slidably connected to the mold frame (1), comprising: A lower mounting seat (31) is slidably connected to the mold frame (1), and is mounted on a lower punch (32) and a lower concave die (33) on the lower mounting seat (31), wherein the lower punch (32) cooperates with the lower concave die (33); The upper die (23) is slidably and elastically connected to the upper mounting seat (21), and further comprises an upper demoulding ejector rod (24) capable of pushing the upper die (23) to move, and / or, The lower concave die (33) is slidably and elastically connected to the lower mounting seat (31), and also comprises a lower demoulding ejector rod capable of pushing the lower concave die (33) to move.

2. The easy demoulding molding structure of the powder molding machine according to claim 1, characterized in that: The upper mounting seat (21) is slidably connected to the mold frame (1) via a first guide column (11), the upper die (23) is slidably connected to the upper mounting seat (21) via a second guide column (25), a first elastic member (26) is provided between the upper die (23) and the upper mounting seat (21), and during the pressing process, the upper die (23) slides upward and pushes against the first elastic member (26).

3. The easy demoulding molding structure of the powder molding machine according to claim 2, characterized in that: The upper die (23) comprises a cavity die (231) and a connecting plate (232), wherein the connecting plate (232) is fixedly connected to at least two of the second guide pillars (25), and two adjacent second guide pillars (25) are connected via a T-block (27) on a side away from the connecting plate (232).

4. The easy demoulding molding structure of the powder molding machine according to claim 3, characterized in that: The second guide pillars (25) are arranged in four pieces, the first elastic member (26) is a spring, four spring mounting holes are arranged on the upper mounting seat (21), one end of the spring is fixed in the mounting hole, and the lower end contacts the upper concave mold (23).

5. The easy demoulding molding structure of the powder molding machine according to claim 3, characterized in that: The upper punch die (22) comprises an upper punch head (221) and an upper punch plate (222); the upper punch plate (222) is fixedly connected to the upper mounting seat (21); and the connecting plate (232) is provided with a guide groove (2321) matching the shape of the upper punch plate (222).

6. The easy demoulding molding structure of the powder molding machine according to claim 2, characterized in that: The lower die (33) is slidably connected to the first guide column (11), and the lower punch (32) is fixedly mounted on a fixed plate (34). When the lower die (33) slides downward, the lower punch (32) can move up and down in the cavity of the lower die (33).

7. The easy demoulding molding structure of the powder molding machine according to claim 6, characterized in that: The lower die (33) is fixedly connected with a first connecting rod (35) penetrating the fixed plate (34); a push rod mounting plate (36) is slidably connected to the first connecting rod (35); the upper demoulding push rod (24) is fixed on the push rod mounting plate (36); a second connecting rod (37) is connected to the push rod mounting plate (36) at a side away from the lower die (33); the push rod mounting plate (36) can be driven by pulling the second connecting rod (37) to push the upper demoulding push rod (24) out of or retract from the lower die (33).

8. The easy-to-release molding structure of a powder molding machine according to claim 6, characterized in that: The upper concave die (23) is provided with a pressing hole (233) corresponding to the upper demoulding ejector rod (24); a vibration protrusion at a preset position is provided in the pressing hole (233); a concave position matching the vibration protrusion is provided on the upper demoulding ejector rod (24); the vibration protrusion is arc-shaped up and down, and the periphery of the concave position is arc-shaped and inclined.

9. The easy-to-release molding structure of a powder molding machine according to claim 1, characterized in that: A second elastic member and a third guide column are provided between the lower concave die (33) and the lower mounting seat (31); the second elastic member is sleeved outside the third guide column; and the lower demoulding ejector rod passes through the upper mounting seat (21) and cooperates with the lower concave die (33).

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