阅读说明：本技术 粉末注射成形生坯用的去毛刺装置 (Deburring device for powder injection molding green body ) 是由 林高欲 张善寿 尹学荣 于 2021-08-27 设计创作，主要内容包括：本发明公开了一种粉末注射成形生坯用的去毛刺装置,其用于对粉末注射成形生坯进行去毛刺,其包括：磁力发生机构；支架,其一端与所述磁力发生机构固定连接；悬吊单元,其能转动地连接在所述支架的另一端上；多个装料容器,多个所述装料容器沿周向均匀分布地设置在所述悬吊单元上,任一所述装料容器内设有多个具有导磁性的研磨介质。本方案具有在确保生坯去毛刺效率的前提下避免生坯受损的优点。(The invention discloses a deburring device for powder injection molding green bodies, which is used for deburring the powder injection molding green bodies and comprises: a magnetic force generating mechanism; one end of the bracket is fixedly connected with the magnetic force generating mechanism; a suspension unit rotatably connected to the other end of the bracket; the plurality of charging containers are uniformly distributed on the suspension unit along the circumferential direction, and a plurality of grinding media with magnetic permeability are arranged in any one of the charging containers. This scheme has avoids the impaired advantage of unburned bricks under the prerequisite of ensureing unburned bricks burring efficiency.)

1. A deburring apparatus for powder injection molded green bodies for deburring powder injection molded green bodies, comprising:

a magnetic force generating mechanism;

one end of the bracket is fixedly connected with the magnetic force generating mechanism;

a suspension unit rotatably connected to the other end of the bracket;

a plurality of charging containers which are uniformly distributed on the suspension unit along the circumferential direction, wherein a plurality of grinding media with magnetic permeability are arranged in any one charging container;

the bracket comprises a base and a supporting rod, the base is fixedly connected with the magnetic force generating mechanism, one end of the supporting rod is fixedly connected with the base, and the other end of the supporting rod is rotatably connected with the suspension unit through a bearing;

a plurality of mounting holes for accommodating the charging containers are formed in the suspension unit, the number of the mounting holes is consistent with that of the charging containers, a boss is arranged on the outer wall of any charging container, the outer size of the boss is larger than the inner size of the mounting hole, so that the charging container is suspended in the mounting hole through the boss, and the outer size of the part, penetrating into the mounting hole, of the charging container is smaller than the inner size of the mounting hole, so that the charging container can rotate relative to the suspension unit;

the deburring device for the powder injection molding green body further comprises a motor, the motor is arranged on the support, and the motor is used for driving the suspension unit to rotate in the direction opposite to the magnetic field when the magnetic force generation mechanism generates the magnetic field.

2. A deburring apparatus for a powder injection molded green body as claimed in claim 1, wherein a distance between a bottom of said charging container and said base is 5 to 10 mm.

3. A deburring apparatus for powder injection molded green bodies as claimed in claim 1, wherein said grinding medium comprises a main body and at least one projection provided on said main body, an end of said projection remote from said main body having an included angle, said included angle being less than or equal to 30 °.

4. The apparatus for deburring powder injection molded green bodies of claim 1 wherein said grinding media is made of one or more of 304 stainless steel, 316 stainless steel, 304L stainless steel or 316L stainless steel.

5. A deburring apparatus for powder injection molded green bodies as claimed in claim 1, characterized in that a liquid medium comprising one or more of water, an organic solution is further provided in said charging vessel.

Technical Field

The invention relates to the technical field of powder injection molding, in particular to a deburring device for a powder injection molding green body.

Background

The basic process of powder injection molding is as follows: firstly, solid powder and organic binder are uniformly mixed, are granulated and are injected into a die cavity by an injection molding machine in a heating and plasticizing state for curing and molding, then the binder in a molded blank is removed by a chemical or thermal decomposition method, and finally, a final product is obtained by sintering and densifying. Powder injection molded green bodies may be used to refer to intermediate products that have not been densified by sintering in the above-described process.

Since the gap between the sliding mechanism boundary and the parting surface formed by the die surface of the product is inevitably existed, in the injection molding process, high pressure and high speed are acted on the molten material, especially the feeding material of inorganic powder (metal or ceramic, etc.) mixed with high molecular polymer, and after the feeding material is filled at high pressure and high speed, the gap of the mechanism boundary can generate the phenomenon of material micro-overflow, so-called injection green body burr is formed. In addition to affecting the appearance of the product, the burr, once cured, becomes a hard blade and is prone to significant product defects. Therefore, the problem to be solved by those skilled in the art is how to avoid the formation of sharp edges by burrs when the powder injection molded green body is cured at high temperature into a product, which may hurt people or prevent assembly smoothness.

Disclosure of Invention

In order to overcome the defects in the prior art, the embodiment of the invention provides a deburring device for powder injection molding green bodies, which is used for solving the problems.

The embodiment of the application discloses: a deburring apparatus for a powder injection molded green body for deburring the powder injection molded green body, comprising:

a magnetic force generating mechanism;

one end of the bracket is fixedly connected with the magnetic force generating mechanism;

a suspension unit rotatably connected to the other end of the bracket;

the plurality of charging containers are uniformly distributed on the suspension unit along the circumferential direction, and a plurality of grinding media with magnetic permeability are arranged in any one of the charging containers.

Specifically, the support includes base and bracing piece, the base with mechanism fixed connection takes place for the magnetic force, the one end of bracing piece with base fixed connection, the other end of bracing piece be used for with hang in midair the unit and rotate and be connected.

Specifically, the suspension unit is connected to the support rod through a bearing.

Specifically, the distance between the bottom of the charging container and the base is 5-10 mm.

Specifically, the suspension unit is provided with a plurality of mounting holes for accommodating the charging containers, the number of the mounting holes is consistent with that of the charging containers, a boss is arranged on the outer wall of any one of the charging containers, and the outer size of the boss is larger than the inner size of the mounting hole, so that the charging container is suspended in the mounting hole through the boss.

Specifically, the charging container can be movably sleeved in a mounting hole of the suspension unit.

Specifically, the grinding medium comprises a main body and at least one protrusion part arranged on the main body, wherein an included angle is formed at one end, far away from the main body, of the protrusion part, and the included angle is smaller than or equal to 30 degrees.

Specifically, the grinding media is made of one or more of 304 stainless steel, 316 stainless steel, 304L stainless steel, or 316L stainless steel.

Specifically, a liquid medium is also arranged in the charging container, and the liquid medium comprises one or more of water and an organic solution.

Specifically, the deburring device for the powder injection molding green body further comprises a motor, and the motor is arranged on the support to drive the suspension unit to rotate.

The invention has at least the following beneficial effects:

1. the deburring device is used for deburring powder injection molding green bodies, so that burrs can be removed at the initial stage, and the burrs are prevented from being changed into one part of a product through high-temperature curing; because the strength of the green compact is smaller than that of the sintered product, in order to avoid the damage caused by mutual extrusion and impact among the green compacts due to the fact that too many green compacts are loaded in the charging container, the volume of the charging container of the embodiment is controlled within a certain range; in addition, in order not to influence the deburring efficiency of the deburring device, the charging containers capable of working simultaneously are arranged in the embodiment, so that a large amount of green bodies can be deburred when the deburring device works once.

2. The suspension unit of this embodiment rotates very smoothly.

3. The plurality of charging containers of the embodiment can not only revolve along with the suspension unit, but also the single charging container can rotate relative to the suspension unit, so that the deburring efficiency of the deburring device of the embodiment can be greatly improved.

4. The charging container and the suspension unit are not fixedly connected, so that the charging container can be quickly placed on the suspension unit or quickly taken down from the suspension unit, and convenience in operation is improved.

5. The motor of this embodiment can drive and suspend the unit in midair and rotate, can adjust the rotational speed and the turning to of suspending the unit in midair according to the burring demand, so, can improve the deburring effect of unburned bricks.

In order to make the aforementioned and other objects, features and advantages of the invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of a deburring apparatus for powder injection molded green bodies in an embodiment of the present invention;

fig. 2 is another structural schematic view of the suspension unit in the embodiment of the present invention;

FIG. 3 is a schematic view of a suspension unit in cooperation with a charging container in an embodiment of the invention;

FIGS. 4-7 are schematic cross-sectional views of grinding media according to embodiments of the present invention;

fig. 8 is a schematic view of the connection of the motor to the suspension unit in the embodiment of the present invention.

Reference numerals of the above figures: 1. a support; 11. a base; 12. a support bar; 2. a suspension unit; 21. mounting holes; 3. a charging container; 31. a boss; 4. a grinding media; 5. a bearing; 6. an electric motor.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The deburring device for a powder injection-molded green compact of the present embodiment is used for deburring a powder injection-molded green compact.

Referring to fig. 1 and 2, the deburring apparatus for powder injection-molded green bodies of the present embodiment includes: a magnetic force generating mechanism (not shown), a bracket 1, a suspension unit 2, a plurality of charging containers 3, and a plurality of grinding media 4 having magnetic permeability. The magnetic force generating mechanism is used for generating a magnetic field, can be a magnetic grinding device on the market, and can generate a strong magnetic field with low rotation; one end of the bracket 1 is fixedly connected with the magnetic force generating mechanism, and the suspension unit 2 is rotatably connected to the other end of the bracket 1, in other words, the suspension unit 2 is connected with the other end of the bracket 1 and the suspension unit 2 can rotate relative to the bracket 1; the plurality of charging containers 3 are uniformly distributed on the suspension unit 2 along the circumferential direction, a plurality of grinding media 4 with magnetic conductivity are arranged in any charging container 3, the grinding media 4 can be stainless steel needles with the radial size of 0.3-0.5 mm and the axial size of 5-8 mm, the stainless steel needles can be made of one or more of 304 stainless steel, 316 stainless steel, 304L stainless steel or 316L stainless steel, the stainless steel has weak magnetism, and can rotate under the action of a magnetic field generated by a magnetic force generating mechanism to further impact a powder injection molding green body, so that the deburring effect on the powder injection molding green body is achieved.

The deburring device for the powder injection molding green body has the working principle that: when the charging container 3 is arranged on the bracket 1 through the suspension unit 2, the plurality of grinding media 4 in the charging container 3 are attracted by the low-gyration strong magnetic field generated by the magnetic force generating mechanism and play around to impact the powder injection molded green body, so that the deburring purpose of the powder injection molded green body is realized; because the connected mode of hanging in midair unit 2 and support 1 is rotationally connected, when a plurality of grinding media 4 produced circumferential motion under the effect of rotating magnetic field, hang in midair unit 2 and can take place to rotate for support 1 under grinding media 4's drive, consequently, the burr can be fallen to the bottom of container for the centrifugal rotation after being struck away from the unburned bricks by grinding media 4, so, can avoid the burr that drops to produce the influence to grinding media 4's motion, the impact rate of grinding media 4 and other burr that have not yet disengaged from the unburned bricks has been improved, be favorable to improving burring efficiency and effect.

More specifically, the charging container 3 of this embodiment, its volume is less than traditional magnetic grinding equipment's charging bucket, so, can avoid packing into too much powder injection molding unburned bricks in same charging container 3 too much and lead to striking each other between the unburned bricks, and then lead to the unburned bricks to appear damaging, in addition, because the sectional area of charging container 3 is less, so, can be so that grinding medium 4 is shorter along the stroke of circumferential motion under the magnetic field effect, consequently, be favorable to grinding medium 4 to play in charging container 3 repeatedly, improve burring efficiency. Since the volume of the single charging container 3 is small, in order to avoid the inefficiency of the deburring device at the time of a single operation, the present embodiment employs a plurality of charging containers 3 simultaneously provided in the suspension unit 2 to improve the production efficiency of a single operation of the magnetic force generating mechanism.

With the adoption of the scheme, the deburring device for the powder injection molding green body has the following advantages:

the deburring device of this embodiment is used for burring powder injection molding unburned bricks, can make the burr just can get rid of at the initial stage, it becomes part of product to avoid the burr to pass through high temperature curing, because the intensity of unburned bricks is less than the intensity of sintered product, for avoid loading too many unburned bricks in the container 3 of charging and lead to squeezing each other between the unburned bricks, the striking and appear damaging, the volume control of the container 3 of charging of this embodiment is in certain within range, in addition, in order not to influence deburring device's deburring efficiency, this embodiment has set up a plurality of containers 3 of charging that can the simultaneous working, also can burring to a relatively large amount of unburned bricks when ensuring deburring device single operation.

Specifically, as shown in fig. 1, the stand 1 of the present embodiment may include a base 11 and a support bar 12. The base 11 is used for being fixedly connected with the magnetic force generating mechanism, one end of the supporting rod 12 is fixedly connected with the base 11, and the other end of the supporting rod 12 is used for being rotatably connected with the suspension unit 2. Further, in order to improve the smoothness of the rotation of the suspension unit 2 during the operation, the support rod 12 and the suspension unit 2 may be connected by a bearing 5.

In particular, when the container 3 is mounted on the suspension unit 2, its bottom is at a distance from the base 11 of the frame 1, which may be between 5 and 10 mm. The distance ensures that the charging container 3 is not too small from the base 11, which leads to interference between the bottom of the charging container 3 and the base 11 of the support 1 when the suspension unit 2 is inclined at a certain angle, thereby affecting the rotation of the charging container 3 (or the suspension unit 2), and simultaneously, the distance ensures that the charging container 3 is not too large from the base 11, which leads to insufficient force of a low rotating magnetic field on the grinding medium 4 in the charging container 3, thereby affecting the deburring effect.

Specifically, as shown in fig. 2 and 3, the suspension unit 2 of the present embodiment is provided with a plurality of (for example, 2 to 6) mounting holes 21 for accommodating the charging containers 3, the number of the plurality of mounting holes 21 corresponds to the number of the plurality of charging containers 3, and a boss 31 may be provided on an outer wall of any one of the charging containers 3, and an outer dimension of the boss 31 is larger than an inner dimension of the mounting hole 21, so that the charging container 3 may be suspended in the mounting hole 21 by the boss 31. More specifically, the suspension unit 2 may be substantially a plate member having a uniform thickness, and a plurality of mounting holes 21 are uniformly provided (distributed in the circumferential direction) in the plate member, so that when the charging container 3 containing an equal amount of green bodies and grinding media 4 is placed in each mounting hole 21, the suspension unit 2 is easily kept balanced from being inclined to be affected in its rotation. Preferably, the mounting hole 21 of the present embodiment may be a circular through hole, the charging container 3 may be a cylindrical shape, a boss 31 is disposed near the opening of the charging container 3, the outer diameter of the portion of the charging container 3 for penetrating the mounting hole 21 may be slightly smaller than the aperture of the mounting hole 21, and the outer diameter of the boss 31 is larger than the aperture of the mounting hole 21, so that when deburring is required, only the charging container 3 containing green bodies and grinding media 4 is required to be inserted into the mounting hole 21, and the charging container 3 may be lapped on the suspension unit 2 through the boss 31, at this time, the charging container 3 and the suspension unit 2 are not fixedly connected, but can move relatively therebetween.

With the above arrangement, when the grinding media 4 in the charging container 3 are subjected to magnetic force and move, the charging container 3 can also rotate relative to the suspension unit 2 by the movement of the grinding media 4, that is, the plurality of charging containers 3 of the present embodiment can not only revolve with the suspension unit 2, but also the single charging container 3 can rotate relative to the suspension unit 2. By adopting the scheme, the deburring efficiency of the deburring device can be greatly improved. In addition, the charging container 3 and the suspension unit 2 of the present embodiment are not fixedly connected, so that the charging container 3 can be quickly placed on the suspension unit 2 or quickly removed from the suspension unit 2, which is beneficial to improving the convenience of operation.

Specifically, as shown in fig. 4 to 7, the grinding media 4 of the present embodiment may be cylindrical or non-cylindrical. The grinding media 4 may comprise a body and at least one protrusion provided on the body, the protrusion having an included angle α at an end remote from the body, the included angle α being less than or equal to 30 °. More specifically, the grinding medium 4 of the present embodiment may have a circular, triangular, drop-shaped, star-shaped cross section, etc. to meet the deburring requirements of green bodies of different shapes.

Specifically, the charging container 3 of the present embodiment may further include a liquid medium, and the liquid medium may be one or more of water and an organic solution, and the organic solution may be ethanol. By adopting the scheme, the deburring effect of the device can be improved. Specifically, the grinding medium 4 is a small mass that can be attracted by magnetic force, and it is guided by the rotation direction of the magnetic force generating mechanism to rotate rapidly and drive the liquid medium to rotate, and in the charging container 3, the injection-molded green body surface with large mass is impacted by the majority of grinding medium 4 and the liquid medium to generate the effect of grinding and removing the material burr.

Specifically, the total volume of the components charged in the charging container 3 of the present embodiment is not more than 70% of the volume of the charging container 3. Preferably, the green compact in the charging vessel is: grinding medium: the liquid medium =20:5:40, and when the mass of the individual green compact is large, it is possible to further reduce the number of green compacts in the charging container 3 (even, only one green compact is placed in one charging container 3). So, to avoid filling into too much unburned bricks in same container 3 and lead to striking each other between the unburned bricks, and then lead to the unburned bricks to appear damaging, simultaneously, also can avoid the material in the container 3 that charges to splash.

Specifically, as shown in fig. 8, the deburring device for powder injection molding of green bodies of the present embodiment further includes a motor 6, the motor 6 may be disposed on the bracket 1 to be connected to the suspension unit 2, and the motor 6 may drive the suspension unit 2 to rotate. Under the condition of no external force, along with the movement of the grinding medium 4, the rotating direction and the rotating speed of the suspension unit 2 are mainly determined by the acting force of a revolving magnetic field generated by the magnetic force generating mechanism on the grinding medium 4, and the rotating speed and the rotating direction of the suspension unit 2 can be adjusted according to the deburring requirement by adopting the motor 6 to drive the suspension unit 2 to rotate (the rotating direction can be adjusted to be opposite to the rotating direction of the revolving magnetic field), so that the deburring effect of the green bodies can be improved. More specifically, the motor 6 can drive the suspension unit 2 to rotate slowly, so that the rotation direction of the suspension unit 2 is opposite to the direction of the magnetic force generating mechanism, and the speed difference generated by the rotation direction and the magnetic force generating mechanism can increase the accelerated impact of the grinding media 4 in the charging container 3, thereby improving the effect of impact grinding of burrs on the surface of the green body.

The principle and the implementation mode of the invention are explained by applying specific embodiments in the invention, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.