CN114602600A

CN114602600A - Superfine grinding equipment and grinding method for polymer crystal plastic powder

Info

Publication number: CN114602600A
Application number: CN202210266280.5A
Authority: CN
Inventors: 孙浪
Original assignee: Jiangsu Langshi Plastic Powder Co ltd
Current assignee: Yichun Longpan Era Lithium Industry Technology Co ltd
Priority date: 2022-03-17
Filing date: 2022-03-17
Publication date: 2022-06-10
Anticipated expiration: 2042-03-17
Also published as: CN114602600B

Abstract

The invention discloses a polymer crystal plastic powder superfine grinding device and a grinding method, which comprises a shell, wherein a primary grinding device, a ball head grinding device and a plane grinding device are arranged in the shell, the ball head grinding device is positioned above the plane grinding device, the primary grinding device is positioned above the ball head grinding device, the primary grinding device comprises a first shell and a cylindrical roller positioned in the first shell, the outer wall of the cylindrical roller is provided with a plurality of grinding blocks according to a certain arrangement rule, and the plurality of grinding blocks are distributed in the same circumference of the cylindrical roller at equal angles. Meanwhile, equipment is not replaced, and the automation degree is high.

Description

Superfine grinding equipment and grinding method for polymer crystal plastic powder

Technical Field

The invention discloses a polymer crystal plastic powder superfine grinding device and a grinding method, and belongs to the technical field of plastic production.

Background

The plastic powder is a material of a plastic spraying process, and is simply sprayed to the surface of the material through air supplied by compressed air after being heated at high temperature; the molding powder as a novel decorative material has the advantages of good plastic spraying effect, low cost, positive color and good aesthetic property; therefore, the molding powder is developed rapidly, and has the characteristics of energy conservation, low pollution, high efficiency, high performance and the like. Especially, when the particle size of the molding powder is smaller, the grain of the surface of the decorative material obtained by plastic spraying is finer and smoother, the planeness is higher, and the product can be widely favored in the market.

The existing plastic powder grinding device is used for grinding plastic powder raw materials with different particle sizes in the same grinding device, and although the particle size of large-particle plastic powder can be reduced to a certain degree, the minimum particle size and grinding efficiency of plastic powder grinding are not ideal under the conditions that the action area of a grinding head is limited and the grinding mode is single and more plastic powder raw materials are put in at the same time.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a polymer crystal molding powder superfine grinding device and a grinding method.

The invention achieves the aim through the following technical scheme, and the superfine grinding equipment for the polymer crystal molding powder comprises a shell, wherein a primary grinding device, a ball head grinding device and a plane grinding device are arranged in the shell, the ball head grinding device is positioned above the plane grinding device, the primary grinding device is positioned above the ball head grinding device, the primary grinding device comprises a first shell and a cylindrical roller positioned in the first shell, the outer wall of the cylindrical roller is provided with a plurality of grinding blocks according to a certain arrangement rule, the grinding blocks are distributed in the same circumference of the cylindrical roller at equal angles, the grinding blocks have the same interval in the axial direction of the cylindrical roller and are arranged in a staggered mode according to steps, a driving mechanism for driving the cylindrical roller to rotate is arranged on the shell, and one end of each grinding block along the rotation direction of the cylindrical roller is provided with a first inclined surface and a second inclined surface, the thickness of the end is smaller than that of the other end of the end, the inner wall of the first shell is provided with a plurality of supporting blocks which are matched with the crushing blocks to crush plastic powder, the supporting blocks are distributed equidistantly along the axial direction of the cylindrical roller and distributed at equal angles in the circumferential direction, the first shell is provided with a feeding hopper penetrating out of the shell, a blanking port of the feeding hopper is higher than the crushing blocks, and a material receiving port is formed in the lower end of the shell.

Preferably, the ball head grinding device comprises a ball head roller and a second shell located on the outer side of the ball head roller, the second shell is fixedly connected with the first shell through a bolt, a discharge hole is formed in the lower end of the second shell, and the ball head roller is connected with the cylindrical roller through a fixing shaft.

Preferably, the plane grinding device comprises an upper plane roller and a lower plane roller, a feeding hole below the discharging hole is formed in the upper plane roller, the lower plane roller is detachably mounted on the shell, a positioning cone matched with the upper plane roller is formed in the lower plane roller, and a driven gear in transmission connection with a driving mechanism is arranged on the periphery of the upper plane roller.

Preferably, a plurality of scattering holes which are symmetrically distributed are formed in the upper plane roller, one end of each scattering hole is communicated with the feeding hole, the other end of each scattering hole is arranged in the direction of the axis far away from the upper plane roller, and a guide cone is further arranged in the center of the first feeding hole.

Preferably, one side of the upper plane roller, which is tightly attached to the lower plane roller, is provided with a plurality of equally divided grinding surfaces, and the plurality of grinding surfaces are provided with grinding grains in different directions.

Preferably, the driving mechanism comprises a motor, a transmission shaft, a driving gear, a belt and two belt pulleys, the two belt pulleys are respectively installed at one end of the transmission shaft and one end of the fixed shaft, the driving gear is installed at the other end of the transmission shaft and is in meshed transmission with the driven gear, and the transmission shaft is connected with an output shaft of the motor.

Preferably, the first shell and the outer side of the lower plane roller are provided with supports, the inner wall of the shell is provided with a fixed block, the fixed block is provided with a cone, and the supports are provided with mounting holes matched with the cone.

Preferably, the first shell comprises a left shell and a right shell, and the left shell, the right shell and the second shell are fixedly connected in pairs through bolts.

Preferably, a baffle for preventing oil leakage is installed on the inner side of the housing corresponding to the lower part of the driven gear.

A method for superfine grinding of polymer crystal molding powder comprises the following steps:

s1: the plastic powder raw material is fed from a feed hopper and then slides onto the crushing block by virtue of gravity, the cylindrical roller drives the crushing block to rotate to disperse the plastic powder raw material, and the plastic powder raw material is matched with a supporting block to carry out plane crushing treatment on the plastic powder raw material;

s2: the crushed plastic powder raw material freely falls into a second shell, and a fixed shaft drives a ball head roller to roll the plastic powder raw material to finish primary grinding;

s3: the plastic powder raw material after primary grinding falls into the feed inlet from the discharge port, and secondary grinding is completed through plane grinding treatment of the upper plane roller and the lower plane roller.

Compared with the prior art, the invention has the beneficial effects that:

1. the plastic powder raw material falls onto the supporting block of the next step from the first inclined plane by means of thrust generated by rotation and self gravity, and then is crushed by the second inclined plane and the supporting block under the extrusion action, and the plastic powder falls vertically at a lower speed.

2. The ground plastic powder freely falls into the ball head grinding device, and the plastic powder is subjected to rolling grinding treatment by the ball head roller, and the surface curvatures at different positions are different when the plastic powder is ground by the ball head roller, so that the acting force applied to the plastic powder is different, the particle size of the plastic powder after primary grinding is further reduced, and finally, the plastic powder is subjected to plane grinding treatment by the upper plane roller and the lower plane roller, so that the particle size of the plastic powder is thinner.

3. The grinding equipment realizes automatic feeding and blanking among different procedures from primary grinding to primary grinding and final plane grinding, only plastic powder raw materials are required to be put into the feed hopper, and after the whole principle is subjected to grinding and twice different grinding treatments, compared with the traditional device, the plastic powder particle size has the advantages of more superiority, higher grinding efficiency and quality, compact structure of the whole equipment, simple installation and disassembly and more practicability.

Drawings

FIG. 1 is a schematic structural diagram of an apparatus for ultra-fine grinding of polymer crystal molding powder according to the present invention;

FIG. 2 is a schematic view of the mounting structure of the components inside the housing according to the present invention;

FIG. 3 is a schematic structural view of a primary crushing device and a ball head grinding device in the invention;

FIG. 4 is a schematic diagram showing the arrangement and distribution of the crushing blocks and the supporting blocks in the present invention;

FIG. 5 is an enlarged view of a portion of FIG. 4 at A;

FIG. 6 is a schematic view of a flat grinder assembly according to the present invention;

FIG. 7 is a sectional view of the flat grinder assembly of the present invention;

FIG. 8 is a schematic view of the construction of the upper flat roll in the present invention;

fig. 9 is a schematic structural view of the housing of the present invention.

Reference numerals: 1. a drive mechanism; 2. a feed hopper; 3. a housing; 4. a material receiving port; 5. a belt; 6. a fixed shaft; 7. a right housing; 8. a second housing; 9. an upper flat roll; 10. a feed inlet; 11. a driven gear; 12. a lower flat roll; 13. a driving gear; 14. a drive shaft; 15. a left housing; 16. a belt pulley; 17. a motor; 18. a cone; 19. crushing the blocks; 20. a cylindrical roll; 21. a ball head roller; 22. a discharge port; 23. a support block; 24. a support; 25. a second inclined plane; 26. a bulk hole; 27. a material guide cone; 28. positioning a cone; 29. grinding the surface; 30. grinding the grains; 31. a first inclined plane; 32. and (5) fixing blocks.

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.

As shown in fig. 1-9, a superfine grinding equipment of polymer crystal moulding powder, including shell 3, wherein the inboard of shell 3 is provided with elementary powder device, bulb grinder and plane grinder, the three arranges according to from high to low in proper order, moulding powder raw materials are successively through shredding and twice different modes's grinding treatment, thereby make moulding powder particle diameter compare traditional device processing and have more the advantage, and grinding efficiency and quality are higher, and whole equipment compact structure, the installation is dismantled simply, more practical, moulding powder after the grinding is accomplished can follow and connect material mouthful 4 whereabouts.

The primary crushing device mainly comprises a first shell and a cylindrical roller 20, wherein the first shell is positioned outside the cylindrical roller 20, a feed hopper 2 is arranged on the first shell, the first shell is divided into a left shell 15 and a right shell 7 which are fixedly connected through bolts for facilitating the assembly of the cylindrical roller 20, and the left shell and the right shell are detachably arranged on the inner wall of the shell 3 through a support 24, a fixing block 32 and a cone 18, a plurality of crushing blocks 19 are arranged on the outer peripheral wall of the cylindrical roller 20, the crushing blocks 19 are distributed in an equal angle manner in the same circumference, and are staggered in a plurality of steps in the installation height direction of the cylindrical roller 20, so that plastic powder raw materials can fall onto the crushing blocks 19 with a lower height from the crushing blocks 19 with the upper height, a plurality of supporting blocks 23 are arranged on the inner wall of the first shell, the supporting blocks 23 are distributed in an equal angle manner in the same circumference and are arranged side by side in different heights, the plastic powder raw material can be crushed by interacting with the crushing block 19.

In order to smoothly ensure that the plastic powder raw material is fed and crushed, a first inclined surface 31 and a second inclined surface 25 are arranged on the crushing block 19, the first inclined surface 31 and the second inclined surface 25 are arranged at the same end of the crushing block 19, the end is arranged at the front end of the driving mechanism 1, which drives the cylindrical roller 20 to rotate through the fixed shaft 6, the thickness of the end is smaller than that of the other end, a gap is formed between the first inclined surface 31 and the bottom surface of the supporting block 23, so that the plastic powder raw material slides into the gap from the first inclined surface 31 under the pushing action of the rotation of the crushing block 19 and falls onto the surface of the supporting block 23 at the next level, at the moment, the second inclined surface 25 gradually reduces the distance between the adjacent supporting blocks 23 to carry out plane extrusion crushing treatment on the plastic powder raw material, in order to enhance the crushing effect, the surface of the supporting block 23 can be set into a rough surface for increasing the friction force, and more supporting blocks 23 and crushing blocks 19 are arranged side by side, so that the distance for crushing the plastic powder is larger, The time is longer, and its particle diameter is refined and even, and whole primary reducing mechanism's volume change is not big moreover, and the structure is compacter, and feeder hopper 2 extends to on the shell 3 in addition, can conveniently throw the material, moulds the powder raw materials simultaneously and get into first casing after, also can by homodisperse, can not pile up together, smash simultaneously, the volume of grinding is bigger to moulding the powder raw materials, and work efficiency is higher.

The ball head grinding device mainly comprises a ball head roller 21 and a second shell 8, the second shell 8 is a semispherical shell, which is connected with the left shell 15 and the right shell 7 by bolts in pairs, and the bottom of the shell is provided with a discharge hole 22, the whole body can be suspended above the plane grinding device by a bracket 24, the ball head roller 21 is connected with the cylindrical roller 20 through the fixed shaft 6, the plastic powder raw material is crushed by the supporting block 23 and the crushing block 19 and then freely falls into a gap between the ball head roller 21 and the second shell 8, because the gaps are also left between the supporting blocks 23 in the same circumference of the lowest position, the molding powder raw material can realize uniform automatic feeding without being accumulated at the same position to influence the grinding efficiency and quality, when the ball head roller 21 grinds the molding powder, the surface curvatures at different positions are different, so that the acting force applied to the molding powder is different, and the particle size of the molding powder after primary grinding is further reduced.

The main structure of the plane grinding device comprises an upper plane roller 9 and a lower plane roller 12, wherein the upper plane roller 9 is provided with a feed inlet 10 positioned below a discharge port 22, the lower plane roller 12 is detachably arranged on a shell 3, the lower plane roller 12 is provided with a positioning cone 28 matched with the upper plane roller 9 to realize accurate positioning, the periphery of the upper plane roller 9 is provided with a driven gear 11 in transmission connection with a driving mechanism 1, the driving mechanism 1 mainly comprises a motor 17, a transmission shaft 14, a driving gear 13, a belt 5 and two belt pulleys 16, the two belt pulleys 16 are respectively arranged at one end of the transmission shaft 14 and one end of a fixed shaft 6, the driving gear 13 is arranged at the other end of the transmission shaft 14 and is in meshing transmission with the driven gear 11, the transmission shaft 14 is connected with an output shaft of the motor 17, when the motor 17 drives the transmission shaft 14 to rotate, the belt pulley 16 drives the belt 5 to rotate, so that the fixed shaft 6 drives a grinding block 19 and a ball head roller 21 to rotate, so can realize moulding the crushing and the roll extrusion abrasive treatment of powder raw materials, and driving gear 13 can drive driven gear 11 and rotate, so make go up the plane roller 9 rotatable for lower plane roller 12, thereby realize moulding the plane abrasive treatment of powder raw materials, drive whole equipment work through same motor 17, its overall structure is compact, the equipment volume, the occupation of land space is littleer, rotate with the central point smoothly for guaranteeing to go up plane roller 9, and rely on the location awl 28 that sets up down on the plane roller 12, thereby prevent the dislocation skew.

The feeding port 10 is located below the discharging port 22, so that the plastic powder raw material ground by the ball head roller 21 freely falls into the feeding port 10, the upper plane roller 9 is provided with a plurality of material scattering holes 26 and material guiding cones 27, wherein the material scattering holes 26 are distributed at equal angles in the center of the upper plane roller 9, one end of each material scattering hole is close to the material guiding cone 27, the other end of each material scattering hole is arranged in the axial direction far away from the upper plane roller 9, and the material scattering holes 26 uniformly disperse the plastic powder raw material between the upper plane roller 9 and the lower plane roller 12 when the plastic powder raw material falls into the feeding port 10 and are guided to the peripheral material scattering holes 26 by the material guiding cones 27, so that uniform plane grinding treatment can be realized, meanwhile, one surface of the upper plane roller 9 and the lower plane roller 12 is provided with a plurality of equally divided grinding surfaces 29, and a plurality of grinding surfaces 29 are provided with grinding 30 in different directions, the plastic powder raw material can be subjected to resistance in different directions when the plastic powder raw material is subjected to plane grinding by utilizing different grinding lines 30, so that the plastic powder raw material is rolled and is extruded by a plane to further refine the particle size of the plastic powder raw material.

The invention also considers the assembly of the whole equipment, especially the installation of the primary crushing device and the plane grinding device, in order to facilitate the disassembly, assembly and replacement of parts, a bracket 24, a fixed block 32 and a cone 18 which have the same structure are arranged between the first shell and the lower plane roller 12 and the shell 3, wherein the cone 18 is positioned on the fixed block 32 and has 5-10 degrees of taper, and the bracket 24 is provided with a mounting hole matched with the cone 18, so that the upper plane roller 9 and the lower plane roller 12 can be vertically arranged on the inner side of the shell 3 after being assembled, the cone 18 and the mounting hole can realize automatic centering, the primary crushing device and the ball grinding device can be arranged on the inner side of the shell 3 in the same mounting mode after being pre-assembled, the cone 18 can limit the rotation freedom degree of the first shell and the lower plane roller 12 without adopting bolt fastening, and can ensure the normal operation of the equipment, so simplified the loaded down with trivial details step of artifical dismouting to in order to prevent that the lubricating oil on driving gear 13 and the driven gear 11 from polluting the moulding powder, increased the baffle on shell 3, avoid taking place the condition of oil leak, overall structure design benefit is reasonable.

s1: the plastic powder raw material is fed from a feed hopper 2 and then slides onto a crushing block 19 by virtue of gravity, the crushing block 19 is driven by a cylindrical roller 20 to rotate to disperse the plastic powder raw material, and the plastic powder raw material is matched with a supporting block 23 to carry out plane crushing treatment on the plastic powder raw material;

s2: the crushed molding powder raw material freely falls into the second shell 8, and then the fixed shaft 6 drives the ball head roller 21 to roll the molding powder raw material to complete primary grinding;

s3: the molding powder raw material after primary grinding falls into the feeding hole 10 from the discharging hole 22, and is subjected to plane grinding treatment by the upper plane roller 9 and the lower plane roller 12 to complete secondary grinding.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A polymer crystal molding powder superfine grinding device comprises a shell (3) and is characterized in that a primary grinding device, a ball head grinding device and a plane grinding device are arranged in the shell (3), the ball head grinding device is positioned above the plane grinding device, the primary grinding device is positioned above the ball head grinding device and comprises a first shell and a cylindrical roller (20) positioned in the first shell, the outer wall of the cylindrical roller (20) is provided with a plurality of grinding blocks (19) according to a certain arrangement rule, the grinding blocks (19) are distributed in an equal angle mode in the same circumference of the cylindrical roller (20), the grinding blocks have the same interval in the axial direction of the cylindrical roller (20) and are arranged in a staggered mode according to steps, and a driving mechanism (1) for driving the cylindrical roller (20) to rotate is arranged on the shell (3), smash piece (19) and have first inclined plane (31) and second inclined plane (25) along the one end of cylinder roller (20) direction of rotation to the thickness of this end is less than the thickness of its other end, the inner wall of first casing has a plurality of and smashes piece (19) cooperation in order to moulding the kibbling supporting shoe (23) of powder, a plurality of supporting shoe (23) are the equidistance along the axial direction of cylinder roller (20) and distribute to all be angular distribution such as equal in the circumferencial direction, be provided with on the first casing and wear out feeder hopper (2) of shell (3), the blanking mouth of feeder hopper (2) is higher than the height of smashing piece (19), the lower extreme of shell (3) is provided with material receiving mouth (4).

2. The superfine grinding equipment for polymer crystal molding powder according to claim 1, wherein the ball head grinding device comprises a ball head roller (21) and a second shell (8) positioned outside the ball head roller (21), the second shell (8) is fixedly connected with the first shell through bolts, a discharge hole (22) is formed in the lower end of the second shell (8), and the ball head roller (21) is connected with the cylindrical roller (20) through a fixed shaft (6).

3. The polymer crystal molding powder superfine grinding equipment according to claim 2, wherein the plane grinding device comprises an upper plane roller (9) and a lower plane roller (12), the upper plane roller (9) is provided with a feeding hole (10) below a discharging hole (22), the lower plane roller (12) is detachably mounted on the shell (3), the lower plane roller (12) is provided with a positioning cone (28) matched with the upper plane roller (9), and the periphery of the upper plane roller (9) is provided with a driven gear (11) in transmission connection with the driving mechanism (1).

4. The polymer crystal plastic powder superfine grinding equipment according to claim 3, wherein the upper plane roller (9) is provided with a plurality of symmetrically distributed material scattering holes (26), one end of each material scattering hole (26) is communicated with the feeding hole (10), the other end of each material scattering hole is arranged in the axial direction far away from the upper plane roller (9), and the center of the first feeding hole (10) is further provided with a material guide cone (27).

5. The polymer crystal molding powder superfine grinding device according to claim 3, wherein the side of the upper plane roller (9) close to the lower plane roller (12) is provided with a plurality of equally divided grinding surfaces (29), and the grinding surfaces (29) are provided with grinding grains (30) with different orientations.

6. The polymer crystal molding powder superfine grinding equipment according to claim 3, wherein the driving mechanism (1) comprises a motor (17), a transmission shaft (14), a driving gear (13), a belt (5) and two belt pulleys (16), the two belt pulleys (16) are respectively installed at one end of the transmission shaft (14) and one end of the fixed shaft (6), the driving gear (13) is installed at the other end of the transmission shaft (14) and is in meshed transmission with the driven gear (11), and the transmission shaft (14) is connected with an output shaft of the motor (17).

7. The polymer crystal molding powder superfine grinding equipment according to claim 3, wherein a support (24) is arranged on the outer side of the first shell and the lower plane roller (12), a fixing block (32) is arranged on the inner wall of the shell (3), a cone (18) is arranged on the fixing block (32), and a mounting hole matched with the cone (18) is arranged on the support (24).

8. The polymer crystal molding powder superfine grinding equipment according to claim 3, wherein the first shell comprises a left shell (15) and a right shell (7), and the left shell (15), the right shell (7) and the second shell (8) are fixedly connected in pairs through bolts.

9. The polymer crystal plastic powder superfine grinding equipment according to claim 3, characterized in that a baffle for preventing oil leakage is installed at the inner side of the housing (3) corresponding to the lower part of the driven gear (11).

10. A method for superfine grinding of polymer crystal molding powder is characterized by comprising the following steps:

s1: plastic powder raw materials are fed from a feed hopper (2) and then slide onto a crushing block (19) by virtue of gravity, the crushing block (19) is driven by a cylindrical roller (20) to rotate to disperse the plastic powder raw materials, and the plastic powder raw materials are matched with a supporting block (23) to carry out plane crushing treatment on the plastic powder raw materials;

s2: the crushed molding powder raw material freely falls into a second shell (8), and a fixed shaft (6) drives a ball head roller (21) to roll the molding powder raw material to finish primary grinding;

s3: the molding powder raw material after primary grinding falls into the feeding hole (10) from the discharging hole (22), and secondary grinding is completed through plane grinding treatment of the upper plane roller (9) and the lower plane roller (12).