Feed preparation device and method for injection molding of high-fluidity metal powder

Abstract

The invention discloses a feed preparation device and method for injection molding of high-fluidity metal powder, and relates to the technical field of metal powder. According to the feed preparation device and method for high-fluidity metal powder injection molding, a bottom plate and a preparation tank arranged above the bottom plate are included, a plurality of supporting legs are fixedly arranged on the bottom face of the bottom plate, a mixing mechanism is arranged in the preparation tank, and a supporting mechanism is arranged between the preparation tank and the bottom plate; the mixing mechanism is positioned above the supporting mechanism; the mixing mechanism comprises a mixing part and an auxiliary part, the mixing part comprises two mixing plates, two springs and two dampers, the technical effect is that a driving rod of the mixing mechanism drives a rotating frame to rotate, then the mixing plates rotate along with the rotating frame, centrifugal force generated in the rotating process of the mixing plates enables the mixing plates to be opened outwards, and the mixing plates are driven to rotate along with the rotating frame. The mixing range of the high-fluidity metal powder and the binding agent can be effectively expanded, and it is ensured that materials are in full contact in a larger space.

Description

Technical Field

[0001] The invention relates to the technical field of metal powders, in particular to a feeding preparation device and method for high-fluidity metal powder injection molding. Background Art

[0002] Metal powder injection molding technology is a product of the integration of multiple disciplines such as plastic molding technology, polymer chemistry, powder metallurgy technology and metal materials science. It uses molds to inject molded blanks and quickly manufactures high-density, high-precision, three-dimensional complex-shaped structural parts through sintering. This process technology not only has the advantages of conventional powder metallurgy processes such as fewer steps, no cutting or less cutting, and high economic benefits, but also overcomes the shortcomings of traditional powder metallurgy products, uneven materials, low mechanical properties, difficulty in forming thin walls, and complex structures. It is particularly suitable for mass production of small, complex and special metal parts;

[0003] The key to metal powder injection molding technology is feed with excellent performance. The traditional method of preparing feed is to evenly mix solid powder with organic binder;

[0004] The existing metal powder mixing device has a relatively simple mixing method and low mixing efficiency. It is difficult to quickly and evenly mix metal powders of different particle sizes with binders, resulting in unstable feeding quality, which in turn affects the molding accuracy and performance of the product. Therefore, a feeding preparation device and method for high-fluidity metal powder injection molding is proposed. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] In view of the shortcomings of the prior art, the present invention provides a feeding preparation device and method for high-fluidity metal powder injection molding, which solves the problem of low mixing efficiency and difficulty in quickly and evenly mixing metal powders of different particle sizes with binders, resulting in unstable feeding quality, which in turn affects the molding accuracy and performance of the product.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented by the following technical solutions: comprising a bottom plate and a preparation tank arranged above the bottom plate, a plurality of support legs being fixedly arranged on the bottom surface of the bottom plate, a mixing mechanism being arranged inside the preparation tank, and a support mechanism being arranged between the preparation tank and the bottom plate;

[0009] The mixing mechanism is located above the supporting mechanism;

[0010] The mixing mechanism comprises a mixing part and an auxiliary part;

[0011] The mixing part includes two mixing plates, two springs and two dampers, and the auxiliary part includes a gear ring and a gear;

[0012] A fixing frame is fixedly provided on the top surface of the bottom plate, and a driving rod is rotatably provided on the inner top surface of the fixing frame through a bearing seat, and the bottom surface of the driving rod passes through the top surface of the preparation tank and extends to the inside of the preparation tank, and a rotating frame is fixedly provided on the bottom surface of the driving rod, and two moving blocks are slidably provided on the inner side surface of the rotating frame, and two moving sleeves are fixedly provided on the outer walls of the two moving blocks respectively, and the bottom surfaces of the two moving sleeves are fixedly connected to the top surfaces of two mixing plates respectively, and a discharge pipe is fixedly provided on the bottom surface of the preparation tank and extends to the inside of the preparation tank, and the two mixing plates are used to stir the high-fluidity metal powder in the preparation tank.

[0013] Preferably, the supporting mechanism includes a supporting rail, the bottom surface of the supporting rail is fixedly connected to the top surface of the base plate, and the surface of the supporting rail is respectively slidably sleeved with a plurality of supporting sleeves, and the top surfaces of the plurality of supporting sleeves are fixedly connected to the bottom surface of the preparation tank. During the rotation of the preparation tank, the supporting sleeve moves on the supporting rail, thereby providing stable support and limiting for the preparation tank, ensuring that the equipment will not shake or deviate during operation, thereby ensuring the stability of the mixing process.

[0014] Preferably, a motor is fixedly provided on the top surface of the bottom plate, a rotating rod is fixedly provided on the top surface of the motor output end, the outer wall of the rotating rod is fixedly connected to the inner side surface of the gear, the inner side surface of the gear ring is fixedly connected to the outer wall of the preparation tank, the tooth surface of the gear is meshed with the tooth surface of the gear ring, and the meshing of the gear and the gear ring makes the rotation directions of the preparation tank and the mixing plate opposite. This design of rotating in opposite directions allows the material to be more strongly stirred during relative motion, thereby improving the mixing efficiency.

[0015] Preferably, two pulleys are fixedly sleeved on the outer wall of the rotating rod and the outer wall of the driving rod respectively, and the two pulleys are connected by belt transmission. The motor drives the rotating rod to rotate, and the driving rod is synchronously rotated through the pulley transmission.

[0016] Preferably, the outer wall fixed sleeve of the rotating frame is provided with a fixed sleeve, a fixed rod is fixedly provided on the bottom surface of the fixed sleeve, a sliding sleeve is provided on the outer wall of the fixed rod, and two control plates are hingedly provided on the outer wall of the sliding sleeve, and the outer walls of the two control plates are hingedly provided with one side surface of the two mixing plates respectively. When the sliding sleeve moves up and down, the two mixing plates can be moved in opposite directions through the two control plates.

[0017] Preferably, two extrusion plates are fixedly provided on the bottom surface of the sliding sleeve, and the fixed sleeve on the outer wall of the fixed rod is provided with a fixed frame, and the top surface of the fixed frame is fixedly connected to the two springs and the bottom surfaces of the two dampers respectively, and the top surfaces of the two springs and the two dampers are fixedly connected to the bottom surfaces of the two extrusion plates respectively, and the two springs are initially in a compressed state. After the stirring is completed, the centrifugal force disappears, and the structure composed of the springs and the dampers comes into play. The springs and the dampers prompt the sliding sleeve to move downward, and the two mixing plates are driven closer to each other through the control plate, thereby reducing the occupied area of ​​the mixing plates in the preparation tank.

[0018] Preferably, a limit rod is fixedly arranged on the bottom surface of the fixed rod, and the sliding sleeve on the outer wall of the limit rod is provided with two limit sleeves, and the top surfaces of the two limit sleeves are respectively fixedly connected to the bottom surfaces of the two mixing plates, and the stability of the two mixing plates can be enhanced by the limit rod and the two limit sleeves.

[0019] Preferably, the bottom surface of the discharge pipe passes through the top surface of the bottom plate and extends to below the bottom plate. A valve is provided inside the discharge pipe, and the metal powder in the preparation tank can be discharged through the discharge pipe.

[0020] Preferably, multiple rollers are rotatably arranged on the inner sides of the multiple support sleeves through multiple sets of bearing seats, and the outer walls of the multiple rollers are slidably connected to the top surface of the support rail. This design reduces the friction when the support sleeve rotates on the support rail, effectively reducing the wear between the support components during the operation of the equipment.

[0021] A method for preparing a feeding device for high-fluidity metal powder injection molding, comprising the following steps:

[0022] Step 1: First, prepare two metal powders of different particle sizes and mix them in a specific ratio;

[0023] Step 2: Next, prepare a specific binder, and put the binder and the mixed metal powder into the preparation tank;

[0024] Step 3: Turn on the mixing mechanism. After the mixing mechanism is turned on, the binder and metal powder in the preparation tank can be mixed;

[0025] Step 4: After the mixing is completed, open the valve inside the discharge pipe. After the valve is opened, the mixed metal powder will be discharged through the discharge pipe.

[0026] (III) Beneficial effects

[0027] The invention provides a feeding material preparation device and method for high-fluidity metal powder injection molding.

[0028] It has the following beneficial effects:

[0029] 1. The driving rod of the mixing mechanism drives the rotating frame to rotate, and then the mixing plate rotates accordingly. The centrifugal force generated by the mixing plate during the rotation causes it to open outward, which can effectively expand the mixing range of high-fluidity metal powder and binder, ensure that the materials are fully contacted in a larger space, and improve the uniformity of mixing.

[0030] 2. The motor drives the rotating rod to rotate, and the driving rod rotates synchronously through the pulley transmission. At the same time, the meshing of the gear and the gear ring makes the preparation tank and the mixing plate rotate in opposite directions. This design of rotating in opposite directions allows the material to be more strongly agitated during relative motion, improves the mixing efficiency, and can complete high-quality mixing in a shorter time.

[0031] 3. After the stirring is completed, the centrifugal force disappears, and the structure composed of the spring and the damper comes into play. The spring and the damper cause the sliding sleeve to move downward, and the two mixing plates are driven closer to each other through the control plate, thereby reducing the area occupied by the mixing plates in the preparation tank. This allows the metal powder in the preparation tank to be discharged more smoothly through the discharge pipe during discharge, thus avoiding the discharge blockage problem caused by the obstruction of the mixing plate.

[0032] 4. The support mechanism consists of a support track and multiple support sleeves. During the rotation of the preparation tank, the support sleeve moves on the support track to provide stable support and limit for the preparation tank, ensuring that the equipment will not shake or deviate during operation, thereby ensuring the stability of the mixing process and improving the mixing effect.

[0033] 5. Multiple rollers are arranged on the inner side of the support sleeve through the bearing seat, and the outer wall of the roller is slidably connected with the top surface of the support track. This design makes the friction of the support sleeve smaller when it rotates on the support track, effectively reduces the wear between the supporting components during the operation of the equipment, extends the service life of the equipment components, and reduces the maintenance cost of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0035] Figure 2 This is a schematic diagram of the structure inside the preparation tank of the present invention;

[0036] Figure 3 It is a structural schematic diagram of the mixing mechanism of the present invention;

[0037] Figure 4 It is a schematic diagram of the structure inside the rotating frame of the mixing mechanism of the present invention;

[0038] Figure 5 It is a schematic diagram of the structure inside the support sleeve in the support mechanism of the present invention;

[0039] Figure 6 For the present invention Figure 3 Schematic diagram of the structure of the enlarged area A in the middle;

[0040] Figure 7 For the present invention Figure 5 Schematic diagram of the enlarged structure of area B in the middle.

[0041] In the figure: 1, bottom plate; 2, preparation tank; 3, mixing mechanism; 31, fixed frame; 32, mixing plate; 33, sliding sleeve; 34, fixed rod; 35, discharge pipe; 36, gear ring; 37, motor; 38, gear; 39, rotating rod; 310, pulley; 311, control board; 312, rotating frame; 313, moving block; 314, damper; 315, spring; 316, fixed frame; 317, limit rod; 318, limit sleeve; 319, driving rod; 320, fixed sleeve; 321, moving sleeve; 322, extrusion plate; 4, supporting mechanism; 41, supporting track; 42, supporting sleeve; 43, roller; 5, supporting leg. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Embodiment 1:

[0044] See also Figure 1-7 The present invention provides a technical solution: comprising a bottom plate 1 and a preparation tank 2 arranged above the bottom plate 1, a plurality of support legs 5 are fixedly arranged on the bottom surface of the bottom plate 1, a mixing mechanism 3 is arranged inside the preparation tank 2, and a support mechanism 4 is arranged between the preparation tank 2 and the bottom plate 1;

[0045] The mixing mechanism 3 is located above the supporting mechanism 4;

[0046] The mixing mechanism 3 includes a mixing part and an auxiliary part;

[0047] The mixing part includes two mixing plates 32, two springs 315 and two dampers 314, and the auxiliary part includes a gear ring 36 and a gear 38;

[0048] The top surface of the bottom plate 1 is fixedly provided with a fixing frame 31, and the inner top surface of the fixing frame 31 is rotatably provided with a driving rod 319 through a bearing seat, and the bottom surface of the driving rod 319 passes through the top surface of the preparation tank 2 and extends to the inside of the preparation tank 2, and the bottom surface of the driving rod 319 is fixedly provided with a rotating frame 312, and the inner side surface of the rotating frame 312 is slidably provided with two moving blocks 313, and the outer walls of the two moving blocks 313 are respectively fixedly provided with two moving sleeves 321, and the bottom surfaces of the two moving sleeves 321 are respectively fixedly connected to the top surfaces of the two mixing plates 32, and the bottom surface of the preparation tank 2 is fixedly penetrated. A discharge pipe 35 is provided to extend into the preparation tank 2, two mixing plates 32 are used to stir the high-fluidity metal powder in the preparation tank 2, a motor 37 is fixedly provided on the top surface of the bottom plate 1, a rotating rod 39 is fixedly provided on the top surface of the output end of the motor 37, the outer wall of the rotating rod 39 is fixedly connected to the inner side surface of the gear 38, the inner side surface of the gear ring 36 is fixedly connected to the outer wall of the preparation tank 2, the tooth surface of the gear 38 is meshed with the tooth surface of the gear ring 36, the outer wall of the rotating rod 39 and the outer wall of the driving rod 319 are respectively fixedly sleeved with two pulleys 310, and the two pulleys 31 0 is connected by belt transmission, the outer wall of the rotating frame 312 is fixedly provided with a fixed sleeve 320, the bottom surface of the fixed sleeve 320 is fixedly provided with a fixed rod 34, the outer wall of the fixed rod 34 is slidingly provided with a sliding sleeve 33, the outer wall of the sliding sleeve 33 is respectively hinged with two control plates 311, the outer walls of the two control plates 311 are respectively hinged with the side surfaces of the two mixing plates 32, the bottom surface of the sliding sleeve 33 is fixedly provided with two extrusion plates 322, the outer wall of the fixed rod 34 is fixedly provided with a fixed frame 316, the top surface of the fixed frame 316 is respectively connected with two springs 31 5 and the bottom surfaces of the two dampers 314 are fixedly connected, the two springs 315 and the top surfaces of the two dampers 314 are respectively fixedly connected to the bottom surfaces of the two extrusion plates 322, the two springs 315 are initially in a compressed state, a limit rod 317 is fixedly arranged on the bottom surface of the fixed rod 34, and two limit sleeves 318 are provided on the sliding sleeve of the outer wall of the limit rod 317, and the top surfaces of the two limit sleeves 318 are respectively fixedly connected to the bottom surfaces of the two mixing plates 32, the bottom surface of the discharge pipe 35 passes through the top surface of the bottom plate 1 and extends to the bottom of the bottom plate 1, and a valve is arranged inside the discharge pipe 35;

[0049] The supporting mechanism 4 includes a supporting rail 41, the bottom surface of the supporting rail 41 is fixedly connected to the top surface of the bottom plate 1, and a plurality of supporting sleeves 42 are slidingly sleeved on the surface of the supporting rail 41, and the top surfaces of the plurality of supporting sleeves 42 are fixedly connected to the bottom surface of the preparation tank 2, and the inner sides of the plurality of supporting sleeves 42 are rotatably provided with a plurality of rollers 43 through a plurality of sets of bearing seats, and the outer walls of the plurality of rollers 43 are slidingly connected to the top surface of the supporting rail 41.

[0050] Embodiment 2:

[0051] like Figure 1-7 As shown, based on the same concept as the above-mentioned embodiment 1, this embodiment also proposes a method for preparing a feeding device for high-fluidity metal powder injection molding, comprising the following steps:

[0052] Step 1: First, prepare two metal powders of different particle sizes and mix them in a specific ratio;

[0053] Step 2: Next, prepare a specific binder, and put the binder and the mixed metal powder into the preparation tank 2;

[0054] Step 3: Turn on the mixing mechanism 3. After the mixing mechanism 3 is turned on, the binder and the metal powder in the preparation tank 2 can be mixed;

[0055] Step 4: After the mixing is completed, the valve inside the discharge pipe 35 is opened. After the valve is opened, the mixed metal powder will be discharged through the discharge pipe 35.

[0056] When in use, first prepare two metal powders of different particle sizes before preparation, and mix them in a specific ratio; secondly prepare a specific binder, and put the binder and the mixed metal powder into the preparation tank 2;

[0057] When the motor 37 is turned on, the output end of the motor 37 rotates and the rotating rod 39 can be driven to rotate. When the rotating rod 39 rotates, the driving rod 319 can be driven to rotate through the pulley 310. When the driving rod 319 rotates, the two mixing plates 32 can be driven to rotate through the rotating frame 312. The centrifugal force generated by the two mixing plates 32 during the rotation process can cause them to open outward, thereby expanding the mixing range. During the mixing process, the gear 38 and the gear ring 36 are engaged to make the preparation tank 2 rotate in opposite directions to the two mixing plates 32. By making the preparation tank 2 rotate in opposite directions to the two mixing plates 32, the stirring efficiency can be improved.

[0058] After the stirring is completed, the centrifugal force disappears, and at this time, the sliding sleeve 33 can be moved downward by the two springs 315 and the two dampers 314. When the sliding sleeve 33 moves downward, the two mixing plates 32 can be moved closer to each other through the two control plates 311. After the two mixing plates 32 are moved closer to each other, their occupied area can be reduced, so that the metal powder in the preparation tank 2 can be discharged more smoothly;

[0059] After the mixing is completed, the valve inside the discharge pipe 35 is opened, and after the valve is opened, the mixed metal powder will be discharged through the discharge pipe 35;

[0060] During the rotation of the preparation tank 2, multiple support sleeves 42 can be driven to move above the support track 41. When the multiple support sleeves 42 move above the support track 41, the preparation tank 2 can be limited, and the friction force of the multiple support sleeves 42 when rotating above the support track 41 can be reduced through multiple rollers 43.

[0061] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0062] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A feeding preparation device for high-fluidity metal powder injection molding, comprising a base plate (1) and a preparation tank (2) arranged above the base plate (1), wherein a plurality of supporting legs (5) are fixedly arranged on the bottom surface of the base plate (1), characterized in that: A mixing mechanism (3) is provided inside the preparation tank (2), and a supporting mechanism (4) is provided between the preparation tank (2) and the bottom plate (1); The mixing mechanism (3) is located above the supporting mechanism (4); The mixing mechanism (3) comprises a mixing part and an auxiliary part; The mixing part includes two mixing plates (32), two springs (315) and two dampers (314), and the auxiliary part includes a gear ring (36) and a gear (38); A fixing frame (31) is fixedly arranged on the top surface of the bottom plate (1), and a driving rod (319) is rotatably arranged on the inner top surface of the fixing frame (31) through a bearing seat, and the bottom surface of the driving rod (319) passes through the top surface of the preparation tank (2) and extends into the interior of the preparation tank (2), and a rotating frame (312) is fixedly arranged on the bottom surface of the driving rod (319), and two moving blocks (313) are slidably arranged on the inner side surface of the rotating frame (312), and two moving sleeves (321) are fixedly sleeved on the outer walls of the two moving blocks (313), and the bottom surfaces of the two moving sleeves (321) are fixedly connected to the top surfaces of the two mixing plates (32), respectively, and a discharge pipe (35) is fixedly arranged on the bottom surface of the preparation tank (2) and extends into the interior of the preparation tank (2), and the two mixing plates (32) are used to stir the high-fluidity metal powder in the preparation tank (2).

2. A feeding material preparation device for high fluidity metal powder injection molding according to claim 1, characterized in that: The support mechanism (4) comprises a support track (41), the bottom surface of the support track (41) is fixedly connected to the top surface of the bottom plate (1), a plurality of support sleeves (42) are slidably sleeved on the surface of the support track (41), and the top surfaces of the plurality of support sleeves (42) are fixedly connected to the bottom surface of the preparation tank (2).

3. A feeding material preparation device for high fluidity metal powder injection molding according to claim 1, characterized in that: A motor (37) is fixedly arranged on the top surface of the bottom plate (1), a rotating rod (39) is fixedly arranged on the top surface of the output end of the motor (37), the outer wall of the rotating rod (39) is fixedly connected to the inner side surface of the gear (38), the inner side surface of the gear ring (36) is fixedly connected to the outer wall of the preparation tank (2), and the tooth surface of the gear (38) is meshed with the tooth surface of the gear ring (36).

4. A feeding material preparation device for high fluidity metal powder injection molding according to claim 3, characterized in that: Two pulleys (310) are fixedly sleeved on the outer wall of the rotating rod (39) and the outer wall of the driving rod (319), respectively, and the two pulleys (310) are connected by belt transmission.

5. A feeding material preparation device for high fluidity metal powder injection molding according to claim 1, characterized in that: The outer wall of the rotating frame (312) is fixedly provided with a fixing sleeve (320), the bottom surface of the fixing sleeve (320) is fixedly provided with a fixing rod (34), the outer wall of the fixing rod (34) is slidably provided with a sliding sleeve (33), the outer wall of the sliding sleeve (33) is respectively hingedly provided with two control plates (311), and the outer walls of the two control plates (311) are respectively hingedly connected to the side surfaces of the two mixing plates (32).

6. A feeding material preparation device for high fluidity metal powder injection molding according to claim 5, characterized in that: Two extrusion plates (322) are fixedly arranged on the bottom surface of the sliding sleeve (33); a fixing frame (316) is provided on the outer wall fixing sleeve of the fixing rod (34); the top surface of the fixing frame (316) is fixedly connected to the bottom surfaces of two springs (315) and two dampers (314) respectively; the top surfaces of the two springs (315) and the two dampers (314) are fixedly connected to the bottom surfaces of the two extrusion plates (322) respectively; and the two springs (315) are both in a compressed state in an initial state.

7. A feeding material preparation device for high fluidity metal powder injection molding according to claim 5, characterized in that: A limiting rod (317) is fixedly arranged on the bottom surface of the fixing rod (34), and two limiting sleeves (318) are provided on the sliding sleeve of the outer wall of the limiting rod (317), and the top surfaces of the two limiting sleeves (318) are respectively fixedly connected to the bottom surfaces of the two mixing plates (32).

8. The high-fluidity metal powder injection molding feed preparation device according to claim 1, characterized in that: The bottom surface of the discharge pipe (35) passes through the top surface of the bottom plate (1) and extends to below the bottom plate (1), and a valve is arranged inside the discharge pipe (35).

9. A feeding material preparation device for high fluidity metal powder injection molding according to claim 2, characterized in that: The inner side surfaces of the plurality of support sleeves (42) are rotatably provided with a plurality of rollers (43) through a plurality of sets of bearing seats, and the outer walls of the plurality of rollers (43) are slidably connected to the top surface of the support track (41).

10. A method for preparing a feeding device for high-fluidity metal powder injection molding, characterized in that: The following steps are involved: Step 1: First, prepare two metal powders of different particle sizes and mix them in a specific ratio; Step 2: Next, prepare a specific binder, and put the binder and the mixed metal powder into the preparation tank (2); Step 3: Open the mixing mechanism (3), after which the mixing mechanism (3) can mix the binder and the metal powder in the preparation tank (2); Step 4: After the mixing is completed, the valve inside the discharge pipe (35) is opened. After the valve is opened, the mixed metal powder will be discharged through the discharge pipe (35).

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