Molding powder grinding equipment

Abstract

The utility model relates to molding powder grinding equipment. The device comprises a cylinder body, an upper cover plate, a bottom plate, a rotating shaft and a motor, a plurality of fixed millstones which are vertically distributed at intervals are fixed to the inner wall of the cylinder body, a plurality of vertically-through material leaking areas are arranged on the fixed millstones, and the upper surfaces and the lower surfaces of the fixed millstones are rough; the rotating millstone is composed of a plurality of single polishing pieces distributed in a circumferential array mode, the upper surfaces and the lower surfaces of the single polishing pieces are rough, the rotating millstone and the fixed millstone are sequentially and alternately distributed up and down, a polishing gap is formed between the rotating millstone and the fixed millstone, the polishing gap is gradually reduced from top to bottom, a feeding hopper is arranged on the upper cover plate, and a discharging opening is formed in the bottom plate. Plastic particles can be ground by a plurality of grinding gaps in the plastic particle grinding device, and the grinding gaps are gradually narrowed from top to bottom, so that the plastic particles can be ground for multiple times, powdering is better after grinding each time, and large particles occupy less.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of grinding equipment, in particular to a kind of plastic powder grinding equipment. BACKGROUND

[0002] Plastic powder is the material of plastic spraying process, simply speaking, it is that plastic powder is sprayed to material surface by compressed air after high-temperature heating;As a new type of decorative material, plastic powder has the advantages of good spraying effect, low cost, color and good appearance;Therefore, plastic powder develops rapidly, and it also has the characteristics of energy saving, low pollution, high efficiency and high performance.Especially when the particle size of plastic powder is smaller, the surface texture of the decorative material obtained by spraying is more delicate, the flatness is higher, and the product can also be widely favored in the market.

[0003] Plastic powder needs to go through a grinding process during processing and production, that is, plastic particles are ground into powder by grinding equipment.The common grinding equipment generally grinds by grinding disc, and the longer the grinding time or the more the grinding times of plastic particles on the grinding disc, the better the fineness of the plastic powder and the higher the powder degree.However, the existing grinding equipment is limited by its own structural design, and often only has single grinding effect, resulting in poor fineness of plastic powder grinding, high proportion of large particles after filtration, and low grinding efficiency. SUMMARY

[0004] The utility model provides a kind of plastic powder grinding equipment;Solve the problem that the existing grinding equipment only has single grinding effect in prior art, resulting in poor fineness of plastic powder grinding.

[0005] The above technical problems of the utility model are mainly solved by the following technical scheme: a kind of plastic powder grinding equipment, characterized by: including the cylinder structure of cylinder body, the upper cover plate of the upper side of the cylinder body, the bottom plate of the lower side of the cylinder body, the vertical coaxial rotation connection in the cylinder body of rotating shaft and the motor of the low-speed rotation of rotating shaft, the inner wall of the cylinder body is fixed with several up-and-down interval distribution fixed grinding disc, the fixed grinding disc is equipped with several up-and-down through leakage area, the upper and lower surfaces of the fixed grinding disc are rough setting, the rotating shaft is coaxially fixed with several up-and-down interval distribution rotating grinding disc, the rotating grinding disc is composed of several circumferential array distribution monomer polishing piece, the upper and lower surfaces of the monomer polishing piece are rough setting, the rotating grinding disc and the fixed grinding disc are up-and-down distribution alternately, and the grinding gap is formed between the two, the grinding gap is gradually reduced from top to bottom, the upper cover plate is equipped with feeding hopper, and the bottom plate is equipped with discharge port.

[0006] The working principle of the utility model is as follows: the plastic particles are put into the feeding hopper, and the plastic particles will fall into the inside of the barrel body, because the fixed grinding disc is provided with a material leakage area, and the adjacent single body polishing pieces on the rotating grinding disc are also hollow, so the plastic particles will easily roll down along the hollow areas, whenever the plastic particles roll down to the junction area of the fixed grinding disc and the rotating grinding disc, the plastic particles will be brought into the polishing gap under the driving of the rotating grinding disc, in the polishing gap, the plastic particles will continuously be subjected to shearing force and friction force and gradually be broken, in the falling process of the plastic particles, the plastic particles will be polished in multiple polishing gaps, and the polishing gaps are gradually narrowed from top to bottom, so the plastic particles can be ground multiple times, and the powderization after each grinding is better, the proportion of large particles is less, and the plastic powder after grinding is finally discharged from the discharge port.

[0007] Further, the fixed grinding disc comprises an outer ring part fixedly sleeved on the inner wall of the barrel body and a plurality of fan-shaped polishing pieces fixed on the inner side of the outer ring part, the material leakage area is formed between adjacent fan-shaped polishing pieces, and the upper and lower surfaces of the fan-shaped polishing pieces are provided with a plurality of arc-shaped polishing grooves; the rotating grinding disc further comprises an inner ring part fixedly sleeved on the rotating shaft, the roots of the single body polishing pieces are fixed on the outer side wall of the inner ring part, and the upper and lower surfaces of the single body polishing pieces are provided with a plurality of polishing convex ribs in straight line radial distribution. The distribution direction of the arc-shaped polishing groove and the trend of the polishing convex rib need to keep a certain angle, so that the shearing grinding effect can be enhanced.

[0008] Further, the outer ring gaskets are arranged between adjacent outer ring parts, the inner ring gaskets are arranged between adjacent inner ring parts, and the thicknesses of the two kinds of ring gaskets are gradually thinned from top to bottom. In this way, only a plurality of inner ring gaskets and outer ring gaskets with different thicknesses need to be prepared, so that the distance between the fixed grinding disc and the rotating grinding disc can be easily adjusted, and the sizes and shapes of different fixed grinding discs and rotating grinding discs are the same, so that the production and manufacturing of the utility model are facilitated, and the production cost is reduced.

[0009] Further, the lower side of the inner wall of the barrel body is provided with an outer limiting step, the outer circular ring pad or the outer circular ring part can form up-down abutting and limiting with the outer limiting step, the outer wall of the barrel body on the upper side of the outer limiting step is provided with a plurality of vertical outer guide ribs, the outer side wall of the outer circular ring pad and the outer circular ring part is provided with an outer clamping groove matched with the outer guide rib; the lower end of the rotating shaft is provided with an inner limiting step, the inner circular ring pad or the inner circular ring part can form up-down abutting and limiting with the inner limiting step, the outer wall of the rotating shaft on the upper side of the inner limiting step is provided with a plurality of vertical inner guide ribs, the outer side wall of the inner circular ring pad and the inner circular ring part is provided with an inner clamping groove matched with the inner guide rib; the outer limiting ring is further fixed on the inner wall of the barrel body, and the inner limiting ring is further fixed on the outer wall of the rotating shaft. The outer limiting step and the inner limiting step bear the circular ring pad and the circular ring part on the upper side thereof, the guide ribs and the clamping grooves are clamped to prevent relative rotation, and the outer limiting ring and the inner limiting ring are used for limiting the circular ring pad and the circular ring part on the lower side thereof, so that the polishing gap is fixed and unchanged during the grinding process.

[0010] Therefore, compared with the prior art, the utility model has the following characteristics: 1. The plastic particles in the utility model will experience multiple polishing gaps, and these polishing gaps gradually narrow from top to bottom, so that the plastic particles can be ground multiple times, and the powderization after each grinding will be better, and the proportion of large particles will be less; 2. The rotating speed of the motor is low, which can reduce the heat generated during the grinding process and avoid the phenomenon that the temperature of the grinding area is too high to cause the plastic particles to stick; 3. The utility model adjusts the distance between the fixed grinding disc and the rotating grinding disc by preparing multiple inner circular ring pads and outer circular ring pads with different thicknesses, and the size and shape of the fixed grinding disc and the rotating grinding disc are the same, which facilitates the production and manufacturing of the utility model and reduces the production cost. BRIEF DESCRIPTION OF DRAWINGS

[0011] ATTACHMENT Figure 1 It is a structural schematic diagram of the utility model;

[0012] ATTACHMENT Figure 2 It is a partial structure explosion diagram of the utility model;

[0013] ATTACHMENT Figure 3 It is a transverse sectional view of the barrel body. DETAILED DESCRIPTION

[0014] The technical scheme of the utility model will be further specifically explained below by examples and in combination with the drawings.

[0015] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0016] Example 1: see Figure 1 and Figure 2 A plastic powder grinding device, comprising a cylindrical structure of a barrel 100, an upper cover plate 110 provided on the upper side of the barrel, a bottom plate 120 provided on the lower side of the barrel, a rotating shaft 200 vertically and coaxially connected in the barrel and a motor 300 driving the rotating shaft to rotate at low speed, four fixed grinding plates 400 spaced apart upward and downward are fixed on the inner wall of the barrel, corresponding to fixed grinding plate one 401, fixed grinding plate two 402, fixed grinding plate three 403 and fixed grinding plate four 404, eight upward and downward through material leakage areas 410 are provided on the fixed grinding plate, the upper and lower surfaces of the fixed grinding plate are rough, three rotating grinding plates 500 spaced apart upward and downward are coaxially fixed on the rotating shaft, corresponding to rotating grinding plate one 501, rotating grinding plate two 502 and rotating grinding plate three 503, the rotating grinding plate is composed of eight single polishing pieces 510 arranged in a circumferential array, the upper and lower surfaces of the single polishing piece are rough, the rotating grinding plate and the fixed grinding plate are alternately upward and downward, and a polishing gap 600 is formed therebetween, the corresponding polishing gap of the upper and lower sides of the rotating grinding plate one is 1.2mm, the corresponding polishing gap of the upper and lower sides of the rotating grinding plate two is 0.8mm, and the corresponding polishing gap of the upper and lower sides of the rotating grinding plate one is 0.3mm, a feeding hopper 130 is provided on the upper cover plate, a discharging port 140 is provided on the bottom plate, a paddle 150 is further fixed at the bottom of the rotating shaft, the bottom of the paddle is attached to the upper surface of the bottom plate, and a guide groove 160 is provided at the bottom of the discharging port.

[0017] see Figure 2 The fixed grinding plate comprises an outer circular ring part 420 fixedly sleeved on the inner wall of the barrel and eight fan-shaped polishing pieces 430 fixed on the inner side of the outer circular ring part, the material leakage area is formed between adjacent fan-shaped polishing pieces, and the upper and lower surfaces of the fan-shaped polishing piece are provided with a plurality of arc-shaped polishing grooves 440; the rotating grinding plate further comprises an inner circular ring part 520 fixedly sleeved on the rotating shaft, the roots of the single polishing pieces are fixed on the outer side wall of the inner circular ring part, and the upper and lower surfaces of the single polishing piece are provided with a plurality of polishing convex ribs 530 radially distributed in a straight line.

[0018] see Figure 1 and Figure 3, the outer circular ring pads 710 are arranged between the adjacent outer circular ring parts, the inner circular ring pads 720 are arranged between the adjacent inner circular ring parts, the thicknesses of the two kinds of circular ring pads are gradually reduced from top to bottom; the lower side of the inner wall of the barrel body is provided with an outer limiting step 170, the outer circular ring pad or the outer circular ring part can be in limiting abutment with the outer limiting step from top to bottom, a plurality of vertical outer guide ribs 180 are arranged on the inner wall of the barrel body on the upper side of the outer limiting step, outer clamping grooves are arranged on the outer side wall of the outer circular ring pad and the outer circular ring part and are matched with the outer guide ribs; the lower end of the rotating shaft is provided with an inner limiting step 210, the inner circular ring pad or the inner circular ring part can be in limiting abutment with the inner limiting step from top to bottom, a plurality of vertical inner guide ribs 220 are arranged on the outer wall of the rotating shaft on the upper side of the inner limiting step, inner clamping grooves are arranged on the outer side wall of the inner circular ring pad and the inner circular ring part and are matched with the inner guide ribs; the outer limiting ring 730 is further fixed on the inner wall of the barrel body, and the inner limiting ring 740 is further fixed on the outer wall of the rotating shaft. Since the parts of the grinding equipment will be worn after long-term use, especially the fixed grinding disc and the rotating grinding disc, the structure design is adopted, so that the parts which need to be replaced can be conveniently disassembled and replaced.

[0019] The working principle of the embodiment is as follows: the plastic particles are put into the feeding hopper, and the plastic particles fall into the inside of the barrel body. Since the fixed grinding disc is provided with a material leakage area, and the adjacent single grinding pieces on the rotating grinding disc are also hollow, the plastic particles can easily roll down along the hollow areas. When the plastic particles roll down to the junction area of the fixed grinding disc and the rotating grinding disc, the plastic particles are driven into the grinding gap by the rotating grinding disc. In the grinding gap, the plastic particles are continuously subjected to shearing force and friction force and are gradually broken. In the falling process of the plastic particles, the plastic particles can be ground in multiple grinding gaps, and the grinding gaps are gradually narrowed from top to bottom, so that the plastic particles can be ground multiple times, and the powderization after each grinding is better, and the proportion of large particles is small. The plastic powder after grinding finally falls on the bottom plate and is pushed to the discharge port by the rotating paddle, and is finally discharged from the guide chute.

[0020] It is obvious to those skilled in the art that the utility model can be changed in many ways, and such changes are not considered to be out of the scope of the utility model. All such modifications obvious to those skilled in the art will be included in the scope of the present claims.

Claims

1. A powder grinding device, characterized in that: The device includes a cylindrical body, an upper cover plate covering the upper side of the body, a bottom plate covering the lower side of the body, a rotating shaft vertically and coaxially connected inside the body, and a motor driving the rotating shaft to rotate at low speed. Several fixed grinding discs are fixedly arranged vertically and at intervals on the inner wall of the body. Each fixed grinding disc has several vertically penetrating material leakage areas. The upper and lower surfaces of the fixed grinding discs are roughened. Several rotating grinding discs are coaxially fixed to the rotating shaft, arranged vertically and at intervals. Each rotating grinding disc is composed of several circumferentially arranged individual grinding blades. The upper and lower surfaces of each individual grinding blade are roughened. The rotating grinding discs and the fixed grinding discs are alternately arranged vertically, forming a grinding gap between them. The grinding gap gradually decreases from top to bottom. A feeding hopper is provided on the upper cover plate, and a discharge port is provided on the bottom plate.

2. The powder grinding equipment according to claim 1, characterized in that: The fixed grinding disc includes an outer ring portion fixedly sleeved on the inner wall of the cylinder and a plurality of fan-shaped grinding discs fixed on the inner side of the outer ring portion. The material leakage area is formed between adjacent fan-shaped grinding discs. The upper and lower surfaces of the fan-shaped grinding discs are provided with a plurality of arc-shaped grinding grooves. The rotating grinding disc also includes an inner ring portion fixedly sleeved on the rotating shaft. The root of the individual grinding disc is fixed on the outer wall of the inner ring portion. The upper and lower surfaces of the individual grinding discs are provided with a plurality of grinding ribs that are radially distributed in a straight line.

3. The powder grinding equipment according to claim 2, characterized in that: An outer ring pad is placed between adjacent outer ring portions, and an inner ring pad is placed between adjacent inner ring portions. The thickness of both ring pads gradually decreases from top to bottom.

4. The powder grinding equipment according to claim 3, characterized in that: The lower side of the inner wall of the cylinder is provided with an outer limiting step. The outer ring pad or the outer ring portion can form an upper and lower abutment limit with the outer limiting step. The inner wall of the cylinder above the outer limiting step is provided with several vertical outer guide ribs. The outer walls of the outer ring pad and the outer ring portion are provided with outer slots that are adapted to the outer guide ribs. The lower end of the rotating shaft is provided with an inner limiting step. The inner ring pad or the inner ring portion can form an upper and lower abutment limit with the inner limiting step. The outer wall of the rotating shaft above the inner limiting step is provided with several vertical inner guide ribs. The outer walls of the inner ring pad and the inner ring portion are provided with inner slots that are adapted to the inner guide ribs. An outer limiting ring is also fixed on the inner wall of the cylinder, and an inner limiting ring is also fixed on the outer wall of the rotating shaft.

5. The powder grinding equipment according to claim 1, characterized in that: The bottom of the rotating shaft is also fixed with a paddle, the bottom of which is in contact with the upper surface of the base plate, and the bottom of the discharge port is provided with a guide groove.

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