CN112791638A

CN112791638A - Miniature ball mill

Info

Publication number: CN112791638A
Application number: CN201911115887.8A
Authority: CN
Inventors: 谢贤聚; 白玉兴; 王红梅; 杨昊
Original assignee: Beijing Stomatological Hospital
Current assignee: Beijing Stomatological Hospital
Priority date: 2019-11-14
Filing date: 2019-11-14
Publication date: 2021-05-14

Abstract

The invention discloses a micro ball mill which comprises a stirring drum, an electric device and a stirring ball, wherein the electric device is used for driving the stirring drum to linearly reciprocate, the stirring drum is internally provided with a stirring chamber, the drum wall is of a double-layer structure, the inner layer is an agate layer, the outer layer is a plastic layer, and the stirring ball is an agate stirring ball and is movably placed in the stirring chamber. Drive churn straight reciprocating motion through electric actuator, make the stirring ball and the inside wall of agitator chamber mutually support the extrusion and wait to stir the resin to churn inlayer and stirring ball all are agate material, do not take place chemical reaction with compound resin, can carry out the treatment of small dose sample, and the mixing uniformity is high.

Description

Miniature ball mill

Technical Field

The invention relates to a mixing device, in particular to a micro ball mill.

Background

Before use, the high-viscosity composite resin needs to be fully stirred to fully mix the organic phase and the inorganic phase. The reason why the mixing process of the solid inorganic powder and the liquid organic resin is complicated is that it is difficult to sufficiently mix them into a paste due to the high mass fraction of the filler. The existing mixing method is either manual stirring or mechanical stirring. The manually stirred test piece has low precision, and the solid-liquid two phases of the resin are very difficult to mix, so the test pieces for manufacturing a group of test pieces are very long and have high cost. The stirring machine generally uses an agate ball mill, a machine body is cylindrical, a spherical grinding body and a material are arranged in the machine body, the centrifugal force and the friction force generated when the machine body rotates bring the material and the grinding body to a certain height and then fall down, the material is ground into fine powder through continuous mutual impact and friction, and the mixing effect is achieved.

However, the conventional stirring machine is expensive and limited by the principle, is difficult to handle a small-dose sample, requires a large amount of material for each operation, is suitable for commercial resin production, and is not suitable for the case where a laboratory preparation of a resin or a preliminary experiment or the like is required in research. Especially, in the case of preliminary experiments, various raw materials required for preparing the resin are expensive, and if each group prepares the resin according to the above-mentioned commercialized instrument, a large amount of material is wasted.

Disclosure of Invention

The invention provides a micro ball mill which overcomes the defects in the background technology. The technical scheme adopted by the invention for solving the technical problems is as follows:

the miniature ball mill comprises a mixing drum, an electric device and a mixing ball, wherein the electric device is used for driving the mixing drum to linearly reciprocate, the mixing drum is internally provided with a mixing chamber, the drum wall is of a double-layer structure, the inner layer is an agate layer, the outer layer is a plastic layer, and the mixing ball is an agate mixing ball and is movably arranged in the mixing chamber.

In a preferred embodiment: the mixing drum comprises a drum body and a drum cover, the drum body and the drum cover are connected together in a threaded screwing mode to form the mixing chamber, and the drum cover and the drum body are of a double-layer structure.

In a preferred embodiment: the thread is provided on an outer plastic layer.

In a preferred embodiment: the plastic layer is formed outside the agate layer in a 3D printing mode.

In a preferred embodiment: the plastic layer is connected to the exterior of the agate layer in an injection molding mode.

In a preferred embodiment: the plastic layer is a nylon layer or polytetrafluoroethylene.

In a preferred embodiment: the electric device comprises a motor, a rotary table, a moving shaft and a connecting rod, the motor drives the rotary table to rotate, one end of the connecting rod is hinged to the eccentric position of the rotary table, the other end of the connecting rod is hinged to the moving shaft, and the moving shaft is connected with the plastic layer of the mixing drum.

In a preferred embodiment: the electric device further comprises a frame through which the moving shaft slides.

Compared with the background technology, the technical scheme has the following advantages:

drive churn straight reciprocating motion through electric actuator, make the stirring ball and the inside wall of agitator chamber mutually support the extrusion and wait to stir the resin to churn inlayer and stirring ball all are agate material, do not take place chemical reaction with compound resin, can carry out the treatment of small dose sample, and the mixing uniformity is high.

The churn adopts bilayer structure, and inlayer hardness is greater than outer hardness, produces the piece when preventing agate ball striking, leads to the precision to reduce after sneaking into the resin, and outer plastic layer shaping is easy, is connected simply with electric actuator.

Drawings

The invention is further illustrated by the following figures and examples.

FIG. 1 is a schematic view showing the structure of the micro ball mill according to the present invention.

Detailed Description

Referring to fig. 1, the micro ball mill includes a mixing drum 10, an electric device 20 for driving the mixing drum to reciprocate linearly, and a mixing ball 30. The stirring drum 10 is internally provided with a stirring chamber 12, the wall of the stirring drum 10 is of a double-layer structure, the inner layer is an agate layer 14, and the outer layer is a plastic layer 16. The mixing balls 30 are agate mixing balls and are movably placed in the mixing chamber 12. Preferably, the plastic layer 16 is a nylon layer, and may also be polytetrafluoroethylene. In the process of high-speed movement of the mixing drum 10, the mixing balls 30 and the agate layer 14 extrude the resin to be mixed, and the mixing speed and the mixing force can be correspondingly adjusted according to the sample to be mixed.

This churn 10 adopts the bilayer structure of inlayer agate layer, outer plastic layer, and agate layer hardness is big, plays the guard action to the plastic layer, produces the piece even hits the bad plastic layer when can preventing that stirring ball 30 from striking with the plastic layer, leads to the precision to reduce after sneaking into the resin. In addition, the plastic layer 16 may be formed according to the outer surface of the agate layer 14, or may be customized individually, and may be flexible in design. The mixing drum 10 comprises a drum body and a drum cover, the drum body and the drum cover are connected together in a threaded screwing mode to form the mixing chamber 12, the drum cover and the drum body are of a double-layer structure, and therefore the periphery of the whole mixing chamber 12 is provided with the agate layer 14. The threads are provided on an outer plastic layer 16.

The plastic layer 16 is provided with the threads, the process is simple, the threads on the plastic layers of the barrel body and the barrel cover can be screwed with each other, the plastic layer 16 can play a good protection role on the agate layer, and compared with the method of carving agate threads on agates, the manufacturing cost is greatly reduced.

The plastic layer 16 is formed outside the agate layer 14 by means of 3D printing. Of course, the plastic layer 16 may be attached to the exterior of the agate layer 14 by injection molding.

The electric device 20 comprises a motor, a rotary disc 22, a moving shaft 24 and a connecting rod 26, the motor drives the rotary disc 22 to rotate, one end of the connecting rod 26 is hinged on the eccentric position of the rotary disc 22, the other end of the connecting rod is hinged with the moving shaft 24, and the moving shaft 24 is connected with the plastic layer 16 of the mixing drum 10. Since the mixing drum 10 moves at a high speed, the electric device 20 further includes a frame 28, and the moving shaft 24 slides through the frame 28 to ensure stable movement.

The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, which is defined by the appended claims and their equivalents.

Claims

1. A miniature ball mill is characterized in that: the stirring device comprises a stirring drum, an electric device and a stirring ball, wherein the electric device is used for driving the stirring drum to linearly reciprocate, the stirring drum is internally provided with a stirring chamber, the drum wall is of a double-layer structure, the inner layer is an agate layer, the outer layer is a plastic layer, and the stirring ball is an agate stirring ball and is movably placed in the stirring chamber.

2. The micro ball mill according to claim 1, characterized in that: the mixing drum comprises a drum body and a drum cover, the drum body and the drum cover are connected together in a threaded screwing mode to form the mixing chamber, and the drum cover and the drum body are of a double-layer structure.

3. The micro ball mill according to claim 2, characterized in that: the thread is provided on an outer plastic layer.

4. The micro ball mill according to claim 1, characterized in that: the plastic layer is formed outside the agate layer in a 3D printing mode.

5. The micro ball mill according to claim 1, characterized in that: the plastic layer is connected to the exterior of the agate layer in an injection molding mode.

6. The micro ball mill according to any one of claims 1 to 5, characterized in that: the plastic layer is a nylon layer or polytetrafluoroethylene.

7. The micro ball mill according to claim 1, characterized in that: the electric device comprises a motor, a rotary table, a moving shaft and a connecting rod, the motor drives the rotary table to rotate, one end of the connecting rod is hinged to the eccentric position of the rotary table, the other end of the connecting rod is hinged to the moving shaft, and the moving shaft is connected with the plastic layer of the mixing drum.

8. The micro ball mill according to claim 7, characterized in that: the electric device further comprises a frame through which the moving shaft slides.