Rapid demolding device for MIM product

Abstract

The utility model relates to an MIM product rapid demolding device, and belongs to the technical field of MIM product production, the MIM product rapid demolding device comprises an upper mold and a lower mold, the upper mold is located on the upper side of the lower mold, a mold groove is formed in the side, close to the upper mold, of the lower mold, and an injection hole communicated with the mold groove is formed in the upper mold in a penetrating mode; and the demolding mechanism is mounted on the lower mold, comprises an ejection groove formed in the bottom of the mold groove in a penetrating manner, and further comprises an ejection plate embedded into the ejection groove and an ejection assembly enabling the ejection plate to move in the direction away from the ejection groove. The demolding device has the effects of rapidly demolding the workpiece and improving the production efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of MIM product production, and in particular to a MIM product rapid demoulding device. Background Art

[0002] MIM is the abbreviation of Metal Injection Molding, which is usually used in the production of special-shaped parts. Its molding method is to inject a plasticized mixture of metal powder and its binder into a mold.

[0003] At present, relevant MIM product injection molds, such as the Chinese patent with authorization announcement number CN220050041U, disclose a MIM product injection mold including mold one, mold one is provided with mold two, mold two is provided with a mold groove, mold two is provided with an ejection assembly, mold one is provided with an injection hole one, and mold one is provided with an injection assembly.

[0004] After the workpiece in the related art is formed in the mold, it is difficult to demold quickly, which affects the production efficiency of the workpiece. Utility Model Content

[0005] In order to quickly demould the workpiece and improve production efficiency, the present application provides a MIM product rapid demoulding device.

[0006] The present application provides a MIM product rapid demoulding device adopts the following technical solution:

[0007] A MIM product rapid demoulding device comprises an upper mold and a lower mold, wherein the upper mold is located on the upper side of the lower mold, a mold groove is provided on a side of the lower mold close to the upper mold, an injection hole is provided through the upper mold and interpenetrates with the mold groove, and further comprises a demoulding mechanism installed on the lower mold, wherein the demoulding mechanism comprises an ejection groove through the bottom of the mold groove, and the demoulding mechanism further comprises an ejection plate embedded in the ejection groove and an ejection assembly for moving the ejection plate in a direction away from the ejection groove.

[0008] By adopting the above technical solution, when the workpiece in the lower mold needs to be demolded after being formed, the upper mold is moved away from the lower mold, and the ejector plate is ejected upward by the ejector assembly, so that the workpiece is ejected in a direction away from the mold groove, thereby achieving rapid demolding.

[0009] Optionally, the ejection assembly includes a through pipe connected to the ejection groove, the through pipe is installed on the side wall of the lower mold, a sleeve is installed on the end of the through pipe away from the lower mold, a piston plate is slidably installed in the sleeve, the axis of the piston plate and the axis of the sleeve are located in the same straight line, a vent hole is opened on the piston plate, a sealing plate that can seal the vent hole is hinged on the side of the piston plate close to the through pipe, a connecting rod is fixed on the side of the piston plate away from the through pipe, and the end of the connecting rod away from the piston plate extends out of the sleeve.

[0010] By adopting the above technical solution, when the piston plate is pulled by the pull rod to move in the direction away from the through pipe, the piston plate is away from the vent hole, allowing the outside air to enter the through pipe through the vent hole; when the piston plate moves in the direction close to the through pipe, the piston plate blocks the vent hole, allowing the air in the sleeve to enter the ejection groove through the through pipe, thereby ejecting the ejector plate, thereby achieving the effect of demolding the workpiece.

[0011] Optionally, a limiting ring is fixed to the inner wall of one end of the sleeve away from the through pipe to reduce the possibility that the piston plate completely separates from the sleeve.

[0012] By adopting the above technical solution, the limiting ring reduces the situation where the piston plate completely separates from the sleeve when sliding in the sleeve.

[0013] Optionally, the demolding mechanism also includes a limit assembly for limiting the up and down sliding of the ejector plate, the limit assembly includes a plurality of sliding rods fixed to the side of the ejector plate away from the mold groove, a plurality of limit plates are fixed in the ejector groove, and limit plates are installed on both sides of each sliding rod, and the sliding rod is slidably installed between two adjacent limit plates.

[0014] By adopting the above technical solution, the limiting plate limits the upward and downward sliding of the sliding rod, thereby limiting the upward and downward sliding of the ejector plate, ensuring stable ejection of the ejector plate and achieving a rapid demoulding effect.

[0015] Optionally, each of the limit plates is provided with a sliding groove, which is opened along the length direction of the limit plate. A slider is fixed on the side of the sliding rod close to the limit plate. The slider is located at the end of the sliding rod away from the ejection plate. The slider is located in the sliding groove and is slidably connected to the sliding groove.

[0016] By adopting the above technical solution, the slider is slidably installed in the slide groove, so that the slider is not easy to completely separate from the limit plate in the vertical direction, thereby reducing the situation where the ejection plate completely separates from the ejection groove in the vertical direction.

[0017] Optionally, the demolding mechanism also includes a reinforcing assembly for enhancing the ejection of the ejection plate, the reinforcing assembly including an abutment rod, the abutment rod being located on the side of the sliding rod away from the ejection plate, and the abutment rod being located between two adjacent limit plates, an ejection block being fixed to the side wall of the abutment rod, and the ejection block having an end close to the sliding rod having an inclined surface gradually tilted upward from the side close to the sliding rod to the side away from the sliding rod, the lower end of the sliding rod abuts against the side of the ejection block close to the inclined surface, and the end of the abutment rod away from the sliding rod passes through the through pipe and extends into the sleeve.

[0018] By adopting the above technical solution, the reinforcing component further enhances the ejection effect of the ejector plate. When the piston plate moves to the side close to the through pipe, the piston plate abuts against the abutment rod, causing the abutment rod to slide laterally, so that the lower end of the sliding rod gradually slides upward along the inclined surface on the ejection block, so that the ejector plate is ejected, achieving rapid demoulding.

[0019] Optionally, a spring is fixed to one end of the abutment rod away from the sleeve, one end of the spring is fixed to the inner wall of the ejection groove, and the other end is fixed to the abutment rod.

[0020] By adopting the above technical solution, the spring realizes the reset of the abutment rod. When the abutment rod slides toward one side of the through pipe under the action of the piston plate, the spring is compressed. When the piston plate moves away from the abutment rod, the spring resets the abutment rod to its initial position.

[0021] Optionally, a blocking block is fixed on the lower mold, and the blocking block is located on the outside of the mold groove. A blocking groove is opened on the upper mold, and the blocking block is arranged opposite to and embedded in the blocking groove.

[0022] By adopting the above technical solution, the blocking block and the blocking groove are interlocked with each other, which reduces the overflow of metal powder poured into the mold groove and facilitates the positioning of the upper mold and the lower mold.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. When the workpiece in the lower mold needs to be demolded after being formed, move the upper mold away from the lower mold, and use the ejector assembly to eject the ejector plate upward, so that the workpiece is ejected in the direction away from the mold groove to achieve rapid demolding;

[0025] 2. The limit plate limits the up and down sliding of the sliding rod, thereby limiting the up and down sliding of the ejector plate, ensuring the stable ejection of the ejector plate and achieving the effect of rapid demoulding;

[0026] 3. The strengthening component further enhances the ejection effect of the ejector plate. When the piston plate moves to the side close to the through pipe, the piston plate abuts against the abutment rod, causing the abutment rod to slide laterally, so that the lower end of the sliding rod gradually slides upward along the inclined surface on the ejection block, so that the ejector plate is ejected and rapid demoulding is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is an exploded diagram of the upper mold and the lower mold.

[0028] Figure 2 It is a structural schematic diagram of the upper mold.

[0029] Figure 3 It is a cross-sectional view of the lower mold.

[0030] Figure 4 is a cross-sectional view of the ejector assembly.

[0031] Figure 5 The limit components and reinforcement components are Figure 3 A partial enlarged view of point A in the middle.

[0032] Explanation of the reference numerals: 1. upper mold; 11. injection hole; 12. positioning groove; 13. blocking groove; 2. lower mold; 21. mold groove; 22. positioning block; 23. blocking block; 3. demoulding mechanism; 31. ejector groove; 32. ejector plate; 33. ejector assembly; 331. through pipe; 332. sleeve; 333. piston plate; 3331. vent hole; 3332. mounting groove; 334. sealing plate; 335. connecting rod; 336. mounting rod; 337. limiting ring; 34. limiting assembly; 341. sliding rod; 3411. slider; 342. limiting plate; 3421. slide groove; 35. reinforcing assembly; 351. abutting rod; 352. spring; 353. ejector block. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-5 This application is described in further detail.

[0034] The embodiment of the present application discloses a MIM product rapid demoulding device.

[0035] Reference Figure 1A MIM product rapid demoulding device comprises an upper mold 1 and a lower mold 2 located at the lower side of the upper mold 1. The upper mold 1 and the lower mold 2 are both square blocks. An injection hole 11 is opened through the middle of the upper mold 1, and a mold groove 21 is opened on the upper surface of the lower mold 2. The injection hole 11 is arranged opposite to the mold groove 21. Metal powder can be injected into the mold groove 21 through the injection hole 11. The shape of the mold groove 21 is the shape of a workpiece to be formed. The shape of the mold groove 21 in this embodiment is an I-shape. A demoulding mechanism 3 is also installed on the lower mold 2. The demoulding mechanism 3 can quickly remove the formed workpiece in the mold groove 21, thereby improving the production efficiency of the workpiece.

[0036] Reference Figure 1 and Figure 2 Positioning blocks 22 are vertically fixed at the four end corners of the lower mold 2. The positioning blocks 22 are located on the upper surface of the lower mold 2. Four positioning grooves 12 are fixed on the lower surface of the upper mold 1. The positioning blocks 22 are opposite to the positioning grooves 12 one by one and are plugged into each other, which is convenient for the positioning and installation of the upper mold 1 and the lower mold 2, and then convenient for the injection hole 11 to be aligned with the mold groove 21.

[0037] A blocking block 23 is also fixed on the lower mold 2, and the blocking block 23 is located at the outer edge of the mold groove 21. A blocking groove 13 is opened on the lower side of the upper mold 1. The blocking groove 13 has the same shape as the blocking block 23, and the blocking groove 13 and the blocking block 23 are interlocked.

[0038] The demolding mechanism 3 includes an ejector groove 31 opened in the lower mold 2. The shape of the ejector groove 31 is the same as the shape of the mold groove 21. The ejector groove 31 is located at the lower side of the mold groove 21 and is interconnected. The width of the ejector groove 31 is smaller than the width of the mold groove 21. An ejector plate 32 is embedded in the ejector groove 31. The shape of the ejector plate 32 is the same as the cross-section of the ejector groove 31. When the ejector plate 32 is embedded in the ejector groove 31, the bottom wall of the mold groove 21 is kept flush to ensure the molding effect of the workpiece.

[0039] The demoulding mechanism 3 further includes an ejection assembly 33 , which can eject the ejection plate 32 upwards, thereby facilitating the ejection of the formed workpiece from the lower mold 2 .

[0040] Reference Figure 3 and Figure 4The ejection assembly 33 includes a through pipe 331 horizontally mounted on the side wall of the lower mold 2, and the through pipe 331 is connected to the ejection groove 31, and a sleeve 332 is installed through the end of the through pipe 331 away from the lower mold 2, and the diameter of the sleeve 332 is larger than the diameter of the through pipe 331. A piston plate 333 is slidably installed in the sleeve 332, and the piston plate 333 can slide horizontally along the length direction of the sleeve 332. The axis of the piston plate 333 and the axis of the sleeve 332 are located in the same straight line. A vent hole 3331 is opened at the center of the piston plate 333, and the piston plate 333 is close to the through pipe. A mounting groove 3332 is provided on one side of the tube 331, and the mounting groove 3332 is connected to the vent hole 3331. The cross-sectional size of the mounting groove 3332 is larger than the cross-sectional size of the vent hole 3331. A sealing plate 334 is hinged in the mounting groove 3332. The size of the sealing plate 334 is the same as that of the mounting groove 3332, and the sealing plate 334 can rotate in the horizontal direction. Two connecting rods 335 are also vertically fixed on the piston plate 333. The two connecting rods 335 are parallel to each other and symmetrically arranged about the vent hole 3331. The connecting rod 335 extends horizontally out of the sleeve 332 in the direction away from the connecting tube.

[0041] A mounting rod 336 is fixed at one end of the connecting rod 335 away from the piston plate 333. The mounting rod 336 is fixed between the two connecting rods 335. The mounting rod 336 further facilitates the staff to pull the two connecting rods 335 and drive the piston plate 333 to reciprocate in the sleeve 332. A limiting ring 337 is fixed to the inner wall of the end of the sleeve 332 away from the connecting tube. The axis of the limiting ring 337 is located in the same straight line as the axis of the sleeve 332, which limits the reciprocating movement of the piston plate 333 and reduces the situation where the piston plate 333 is completely separated from the sleeve 332.

[0042] When the piston plate 333 moves in a direction away from the through pipe 331, outside air enters the sleeve 332 through the vent hole 3331, and the sealing plate 334 is in an open state. When the piston plate 333 moves in a direction close to the through pipe 331, the air in the sleeve 332 enters the ejection groove 31 through the through pipe 331, and ejects the ejection plate 32 in the ejection groove 31 upward, thereby achieving a quick demolding effect.

[0043] Reference Figure 3 and Figure 5The demolding mechanism 3 also includes a limit assembly 34, which limits the upward sliding of the ejection plate 32. The limit assembly 34 includes a plurality of sliding rods 341 fixed at intervals on the lower surface of the ejection plate 32. Both sides of each sliding rod 341 are vertically fixed with limit plates 342. The sliding rod 341 is clamped between two adjacent limit plates 342 to limit the upward sliding of the sliding rod 341. Each limit plate 342 is also provided with a sliding groove 3421, and the sliding groove 3421 is provided along the length direction of the limit plate 342. A slider 3411 is fixed on one side of the sliding rod 341 close to the sliding groove 3421. The slider 3411 is located at the lower end of the sliding rod 341. The slider 3411 is slidably connected to the sliding groove 3421 to reduce the situation where the sliding rod 341 is completely separated from the limit plate 342 in the vertical direction, thereby limiting the vertical sliding of the ejection plate 32.

[0044] Reference Figure 3 and Figure 5 The demoulding mechanism 3 also includes a reinforcing component 35, which further enhances the ejection effect of the ejection plate 32 and promotes rapid demoulding.

[0045] The reinforcing assembly 35 includes a horizontally arranged abutment rod 351, one end of which is fixed with a spring 352, one end of the spring 352 is fixedly connected to the abutment rod 351, and the other end is fixed to the side wall of the ejection groove 31, and one end of the abutment rod 351 away from the spring 352 passes through the through pipe 331 and extends into the sleeve 332. When the piston plate 333 moves to a side close to the through pipe 331, the piston plate 333 can abut against the abutment rod 351.

[0046] The abutment rod 351 is horizontally arranged on the lower side of the sliding rod 341, and the abutment rod 351 is located between two adjacent limit plates 342. A plurality of ejection blocks 353 are fixed at intervals in the length direction of the abutment rod 351. The ejection blocks 353 are located on the side of the sliding rod 341 close to the through pipe 331. The side of each ejection block 353 close to the sliding rod 341 has an inclined surface that gradually inclines upward from the side close to the sliding rod 341 to the side away from the sliding rod 341. The lower end of the sliding rod 341 abuts against the inclined surface of the ejection block 353.

[0047] When the piston plate 333 moves toward the direction of the abutting rod and pushes the abutting rod 351 to move toward the direction close to the spring 352, the sliding rod 341 slides upward under the action of the inclined surface on the ejection block 353, promoting the upward movement of the ejection plate 32, further improving the demolding efficiency; when the piston plate 333 moves away from the abutting rod 351, the spring 352 resets the abutting rod 351 to move toward the direction close to the piston plate 333, thereby achieving reset.

[0048] The implementation principle of a MIM product rapid demoulding device in the embodiment of the present application is as follows:

[0049] During the processing, the upper mold 1 and the lower mold 2 are pressed against each other, and metal powder is filled into the mold groove 21 through the injection hole 11. When demolding is performed after molding, the upper mold 1 is first moved away from the lower mold 2, and then the mounting rod 336 is manually pulled to make the piston plate 333 slide horizontally in the sleeve 332. The air in the sleeve 332 is rushed into the ejection groove 31 and then moves upward, so that the ejection plate 32 is ejected. The reinforcing component 35 further enhances the ejection effect of the ejection plate 32, and the limiting component 34 plays a limiting role in the up and down sliding of the ejector plate.

[0050] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A MIM product rapid demoulding device, comprising an upper mold (1) and a lower mold (2), wherein the upper mold (1) is located on the upper side of the lower mold (2), a mold groove (21) is provided on a side of the lower mold (2) close to the upper mold (1), and an injection hole (11) is provided through the upper mold (1) and is connected to the mold groove (21), wherein: The mold release mechanism (3) is also included and is mounted on the lower mold (2). The mold release mechanism (3) includes an ejection groove (31) extending through the bottom of the mold groove (21). The mold release mechanism (3) also includes an ejection plate (32) embedded in the ejection groove (31) and an ejection assembly (33) for moving the ejection plate (32) in a direction away from the ejection groove (31).

2. A MIM product rapid demoulding device according to claim 1, characterized in that: The ejection assembly (33) comprises a through pipe (331) connected to the ejection groove (31), the through pipe (331) being installed on the side wall of the lower mold (2), a sleeve (332) being installed on the through pipe (331) at one end away from the lower mold (2), a piston plate (333) being slidably installed in the sleeve (332), the axis of the piston plate (333) and the axis of the sleeve (332) being located in the same straight line, a vent hole (3331) being provided on the piston plate (333), a sealing plate (334) being hingedly connected to a side of the piston plate (333) close to the through pipe (331) for sealing the vent hole (3331), a connecting rod (335) being fixed to a side of the piston plate (333) away from the through pipe (331), an end of the connecting rod (335) away from the piston plate (333) extending out of the sleeve (332).

3. A MIM product rapid demoulding device according to claim 2, characterized in that: A limiting ring (337) is fixed to the inner wall of one end of the sleeve (332) away from the through pipe (331) to reduce the possibility that the piston plate (333) completely separates from the sleeve (332).

4. A MIM product rapid demoulding device according to claim 1, characterized in that: The demoulding mechanism (3) further comprises a limit assembly (34) for limiting the upward and downward sliding movement of the ejection plate (32); the limit assembly (34) comprises a plurality of sliding rods (341) fixed to a side of the ejection plate (32) away from the mold groove (21); a plurality of limit plates (342) are fixed in the ejection groove (31); a limit plate (342) is installed on both sides of each of the sliding rods (341); and the sliding rod (341) is slidably installed between two adjacent limit plates (342).

5. A MIM product rapid demoulding device according to claim 4, characterized in that: A sliding groove (3421) is formed on each of the limiting plates (342), and the sliding groove (3421) is formed along the length direction of the limiting plate (342). A sliding block (3411) is fixed on the side of the sliding rod (341) close to the limiting plate (342), and the sliding block (3411) is located at the end of the sliding rod (341) away from the ejection plate (32). The sliding block (3411) is located in the sliding groove (3421) and is slidably connected to the sliding groove (3421).

6. A MIM product rapid demoulding device according to claim 4, characterized in that: The demoulding mechanism (3) further comprises a reinforcing assembly (35) for reinforcing the ejection of the ejection plate (32). The reinforcing assembly (35) comprises an abutting rod (351). The abutting rod (351) is located on a side of the sliding rod (341) away from the ejection plate (32), and the abutting rod (351) is located between two adjacent limiting plates (342). An ejection block (353) is fixed to a side wall of the abutting rod (351). An end of the ejection block (353) close to the sliding rod (341) has an inclined surface that gradually tilts upward from a side close to the sliding rod (341) to a side away from the sliding rod (341). The lower end of the sliding rod (341) abuts against a side of the ejection block (353) close to the inclined surface. An end of the abutting rod (351) away from the sliding rod (341) passes through the through pipe (331) and extends into the sleeve (332).

7. A MIM product rapid demoulding device according to claim 6, characterized in that: A spring (352) is fixed to one end of the abutment rod (351) away from the sleeve (332); one end of the spring (352) is fixed to the inner wall of the ejection groove (31), and the other end is fixed to the abutment rod (351).

8. A MIM product rapid demoulding device according to claim 1, characterized in that: A blocking block (23) is fixed on the lower mold (2), and the blocking block (23) is located outside the mold groove (21). A blocking groove (13) is provided on the upper mold (1), and the blocking block (23) is arranged opposite to and fits with the blocking groove (13).

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