Glass fiber chopped material grinding device

Abstract

The invention relates to the technical field of glass fiber processing equipment, and particularly discloses a glass fiber chopped material grinding device which comprises a columnar shell, an outer grinding ring block is fixed to the inner wall of the columnar shell, and the inner ring wall of the outer grinding ring block is formed by sequentially connecting an upper ring face, a first conical face, a grinding groove face, a second conical face and a lower ring face from top to bottom. A centrifugal scattering disc, a pressing and cutting discharging ring and a rotary disc are concentrically arranged in the outer grinding ring block, a circular plate is concentrically arranged between the centrifugal scattering disc and the pressing and cutting discharging ring, a through hole is formed in the circular plate, a first spring is connected between the pressing and cutting discharging ring and the circular plate, and the upper surface of the pressing and cutting discharging ring is connected with a guide column penetrating through the through hole. The upper end of the guide column is connected with a roller which acts with the guide closed-loop groove; according to the grinding device, the problem that an existing grinding machine is prone to unsmooth feeding in the glass fiber chopped material machining process is effectively solved, the whole grinding device can operate stably, and the machining efficiency of the grinding device is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of glass fiber processing equipment, and in particular discloses a glass fiber chopped material grinding device. Background Art

[0002] In the process of glass fiber recycling, the cleaned and dried materials need to be chopped and then ground into powder according to their use. The obtained glass fiber powder can be widely used in various fields such as plastics, rubber, and coatings.

[0003] At present, most manufacturers use traditional grinding machines to grind glass fiber chopped materials. However, due to the different shape of glass fiber chopped materials and ordinary granular materials, normal glass fiber chopped materials are in the form of threads with a length of about 3 to 5 cm. This makes it impossible for them to roll smoothly from the feeding ring gap to the grinding gap between the grinding blocks like ordinary granular materials, which easily causes the feeding ring to be blocked before grinding. Using traditional grinding machines to grind them often requires operators to frequently clear the feeding ring channel, which greatly increases the workload of operators and reduces the grinding efficiency.

[0004] For example, patent application number 2022114442717 discloses a ceramic raw material grinding device, comprising a housing assembly and a motor drive assembly, a grinding assembly disposed inside the housing assembly for grinding the ceramic raw material, and a support assembly disposed on the motor drive assembly. The grinding assembly comprises a mating block fixedly connected to the inner wall of the housing; a grinding block disposed inside the mating block, and the grinding block is open at the top and bottom. When the grinding device disclosed in this patent grinds the material, the material flows downward along the annular gap between the mating block and the grinding block, and is finely ground as the grinding gap gradually decreases. However, when the device is used to grind glass fiber chopped material, since the glass fiber chopped material is in the form of strands of a certain length, when the glass fiber chopped material is centrifugally thrown off and radially overlaps the upper end of the gap between the two, the chopped material cannot smoothly enter the grinding gap, and this also hinders the smooth entry of subsequent chopped material into the annular gap, resulting in poor feeding. Furthermore, the glass fiber chopped material cannot be fully ground into powder in one go during the grinding process, and the grinding equipment cannot screen the chopped material for secondary grinding. As a result, some filamentous materials are still mixed into the powder after the glass fiber chopped material is ground, affecting the quality of the finished product. Therefore, in order to address the technical problems existing in the traditional grinding equipment for grinding glass fiber chopped material, this application proposes a glass fiber chopped material grinding device that can solve the above problems. Summary of the Invention

[0005] The present invention aims to provide a grinding device for chopped glass fiber materials, so as to solve the technical problems that in the process of grinding the chopped glass fiber materials by existing grinding equipment, due to the shape of the chopped glass fiber materials, feeding blockage is likely to occur and the primary grinding is insufficient.

[0006] The present invention is realized through the following technical solutions: A grinding device for chopped glass fiber materials includes a columnar outer shell. A feeding hopper is arranged at the upper end of the columnar outer shell, and a blanking guide plate is arranged at the lower end. An outer grinding ring block is fixed on the inner wall of the columnar outer shell. The inner circumferential wall of the outer grinding ring block is sequentially connected from top to bottom by an upper ring surface, a first conical surface, a grinding groove surface, a second conical surface, and a lower ring surface. Inside the outer grinding ring block, a centrifugal spreading disc, a pressure-cut blanking ring, and a rotating disc that are respectively flush with the upper ring surface, the first conical surface, and the grinding groove surface are concentrically arranged. A driving device for driving the centrifugal spreading disc and the rotating disc to rotate is arranged on the columnar outer shell. A grinding wheel that acts on the grinding groove surface is arranged on the rotating disc; A circular plate fixedly connected to the columnar outer shell is concentrically arranged between the centrifugal spreading disc and the pressure-cut blanking ring. Through holes are formed in the circular plate. A first spring is connected between the pressure-cut blanking ring and the circular plate. A guide post penetrating through the through hole is connected to the upper surface of the pressure-cut blanking ring. A roller is connected to the upper end of the guide post. A ring plate extending downward is arranged on the centrifugal spreading disc. A guide closed-loop groove that acts on the roller is formed in the ring plate. The guide closed-loop groove is sequentially composed of a horizontal arc section and a concave section. A ring cutter perpendicular to the first conical surface is arranged on the pressure-cut blanking ring.

[0007] During the operation of the grinding device for chopped glass fiber materials disclosed in the present invention, the chopped glass fiber materials are introduced onto the upper surface of the centrifugal spreading disc by the feeding hopper. Then, under the action of centrifugal force during the rotation of the centrifugal spreading disc, the chopped glass fiber materials are evenly scattered around. The scattered chopped glass fiber materials enter the gap between the ring plate and the upper ring surface, and enter the gap between the first conical surface and the pressure-cut blanking ring along this gap.

[0008] Meanwhile, during the rotation of the centrifugal material spreading disc, the guiding closed-loop groove on its ring plate will also rotate synchronously. At this time, the roller connected to the pressing and cutting material discharging ring will move up and down continuously under the action of the guiding closed-loop groove. During the upward movement of the pressing and cutting material discharging ring, the feeding gap is opened, and at the same time, the short-cut glass fiber material above is in a continuous moving state, so that it can smoothly enter the feeding gap. Then, during the downward movement of the pressing and cutting material discharging ring, the short-cut glass fiber material is pressed and cut by the ring knife. On the one hand, the short-cut glass fiber material can be further cut into shorter states. On the other hand, during the downward pressing and cutting process of the ring knife, the material can be pushed downward, so that the short-cut glass fiber material can smoothly fall into the grinding groove surface. Then, the short-cut glass fiber material falling into the grinding groove surface is ground into powder under the rolling action of the grinding wheel. Finally, the glass fiber powder material gathers towards the middle along the second conical surface and then falls from the lower ring surface onto the material discharging guide plate, and is discharged and collected by the material discharging guide plate.

[0009] As a further setting of the above solution, a screening mechanism is connected to the lower end of the outer grinding ring block. The material discharging guide plate is arranged directly below the fine material outlet of the screening mechanism. The coarse material outlet end of the screening mechanism is connected to a return screw device located outside the columnar housing. The upper end of the return screw device is connected to a return pipe facing the upper surface of the centrifugal material spreading disc.

[0010] As a further setting of the above solution, the screening mechanism includes a mesh sieve hopper fixedly connected to the lower end of the outer grinding ring block. The outer side of the mesh sieve hopper is connected with a telescopic outer tube. The lower end of the telescopic outer tube is connected with a material guiding hopper. The center of the mesh sieve hopper is connected with a telescopic inner tube. The lower end of the telescopic inner tube is provided with a coarse material discharge pipe connected to the return screw device.

[0011] The present invention also passes through the above-set screening mechanism and return screw device. After one-time grinding and processing, the material falls into the mesh sieve hopper. Then, during the process of moving and gathering towards the center along the mesh sieve hopper, the completely ground fine powder can pass through the surface sieve holes and fall into the material guiding hopper, and is discharged to the material discharging guide plate by the material guiding hopper. While the incompletely ground material gathers in the telescopic inner tube, then moves downward along the coarse material discharge pipe to the lower end of the return screw device. Finally, the return screw device lifts it to the top, and then the material is discharged onto the upper surface of the centrifugal material spreading disc again by the return pipe for secondary grinding and processing, thus fully ensuring the grinding quality of the short-cut glass fiber material.

[0012] As a further setting of the above solution, a sliding rod and a second spring are connected between the material guiding hopper and the upper end of the mesh sieve hopper. A conical block is arranged in the material guiding hopper, and the lower conical surface of the conical block is fitted with the inner conical surface of the material guiding hopper. A telescopic driving part for realizing the up and down movement of the conical block is arranged at the bottom of the columnar housing.

[0013] The present invention further makes an improved design on the basis of the above screening mechanism. After the screening mechanism operates for a period of time, the telescopic driving member actively pulls the conical block downward. During the downward movement of the conical block, it first fits against the inner wall of the feeding hopper to seal its opening, and then stretches the telescopic outer tube downward to increase its internal volume and reduce the pressure. Under the negative pressure inside the mesh sieve hopper, some sieve holes blocked by powder on the mesh sieve hopper are dredged, and the dredged powder falls into the feeding hopper. After the dredging is completed, the telescopic driving member is controlled to extend again to push the conical block upward until the conical block separates from the feeding hopper to form a normal feeding channel, and the telescopic outer tube shortens and resets again under the action of the sliding rod and the second spring.

[0014] As a further setting of the above solution, a rotating bracket is fixedly connected to the lower ring surface in the outer grinding ring block. A grinding rotating shaft is concentrically arranged on the turntable. The lower end of the grinding rotating shaft is connected to the rotating bracket, and the upper end extends into the driving device. A hollow rotating shaft with its upper end extending into the driving device is concentrically arranged on the centrifugal material spreading disk, and the grinding rotating shaft penetrates through the hollow rotating shaft.

[0015] As a further setting of the above solution, the driving device includes a transmission box and a motor. A second bevel gear is arranged at the end of the grinding rotating shaft extending into the transmission box. A first bevel gear is arranged at the end of the hollow rotating shaft extending into the transmission box. A vertical bevel gear that meshes with both the first bevel gear and the second bevel gear is arranged on the motor shaft of the motor. The above is one of the specific rotation driving methods for the centrifugal material spreading disk and the turntable. During the process of the motor driving the vertical bevel gear to rotate, its upper and lower ends respectively mesh with the first bevel gear and the second bevel gear. Then, under the action of the hollow rotating shaft and the grinding rotating shaft, the two can rotate in opposite directions synchronously. During the rotation of the centrifugal material spreading disk, the material can be thrown down by centrifugal force, and during the rotation of the turntable, the material can be fully ground through the action of the grinding wheel and the grinding groove surface.

[0016] As a further setting of the above solution, the circular plate is fixedly connected to the lower end of the upper ring surface through a plurality of radial connecting rods. A plurality of through holes are evenly arranged along the outer edge of the circular plate. A plurality of guide posts penetrating through the corresponding through holes are evenly arranged on the upper surface of the blanking cutting ring. A roller radially outward is rotatably connected to the top of each guide post.

[0017] As a further setting of the above solution, the ring plate extends downward from the outer circular surface of the centrifugal material spreading disk. The guiding closed-loop groove is composed of a plurality of horizontal arc segments and a plurality of concave segments connected in sequence.

[0018] As a further setting of the above solution, the outer circular side of the blanking cutting ring opposite to the first conical surface is arranged as a conical surface. A plurality of ring knives are fixedly arranged at intervals on the conical surface of the blanking cutting ring.

[0019] As a further setting of the above solution, a plurality of grinding wheels are provided, and the plurality of grinding wheels are circumferentially and uniformly arranged on the outer circumferential surface of the turntable.

[0020] Compared with the prior art, the present invention has the following beneficial effects: The glass fiber chopped strand grinding device disclosed by the present invention is provided with a relatively fixed circular plate and a pressing and cutting blanking ring between the centrifugal feeding disk and the turntable, and through the action between the roller at the upper end of the guiding column and the guiding closed-loop groove on the ring plate, the centrifugal feeding disk can make the pressing and cutting blanking ring move up and down reciprocally during the rotation process. And during the downward movement process, through the action between the ring knife and the first conical surface on the outer grinding ring block, the glass fiber chopped strand is pressed and cut. On the one hand, the glass fiber chopped strand is cut shorter and is in a moving state, so as to realize smooth blanking. On the other hand, during the downward pressing process of the ring knife, there is a downward pushing force on the material, so as to force the material into the grinding gap between the lower grinding groove surface and the grinding wheel to complete the grinding process; the structural design of the entire glass fiber chopped strand grinding device is novel and ingenious, effectively solving the problem of easy feeding blockage in the prior grinding machine during the processing of glass fiber chopped strands, enabling the entire grinding device to operate stably and effectively improving its processing efficiency.

[0021] The present invention is provided with a screening mechanism with a special structure below the outer grinding ring block, so that the ground glass fiber powder is screened through the mesh sieve hopper, enabling the completely ground fine powder to be discharged normally, while the uncompletely ground coarse material is sent back to the centrifugal feeding disk again through the return auger device for secondary grinding processing, effectively ensuring the powder processing quality of the glass fiber chopped strand; in addition, the lower end of the telescopic outer tube can be sealed first by the downward movement of the conical block, and then the telescopic outer tube is extended to form a negative pressure inside, and the blocked sieve holes on the mesh sieve hopper are automatically dredged by the negative pressure, ensuring the screening effect of the mesh sieve hopper on the glass fiber powder. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a schematic three-dimensional structure diagram of the first angle of the exterior of the present invention; Figure 2 It is a schematic three-dimensional structure diagram of the second angle of the exterior of the present invention; Figure 3 It is a schematic plan structure diagram of the interior of the present invention; Figure 4Schematic three-dimensional structure diagram when the external grinding ring block, turntable, grinding wheel, etc. cooperate in the present invention; Figure 5 Exploded three-dimensional view of the external grinding ring block, turntable, pressing and cutting blanking ring, etc. in the present invention; Figure 6 Exploded three-dimensional view of the centrifugal feeding tray, turntable, circular plate, etc. in the present invention; Figure 7 For the present invention Figure 3 Enlarged structural schematic diagram of part A in the present invention; Figure 8 For the present invention Figure 5 Enlarged structural schematic diagram of part B in the present invention; Figure 9 Schematic three-dimensional structure diagram of the screening mechanism in the present invention; Figure 10 Schematic internal structure diagram of the three-dimensional cross-section of the screening mechanism in the present invention. Detailed implementation manners

[0024] In order to enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0025] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will refer to the attached Figures 1 to 10 drawings and describe this application in detail in conjunction with the embodiments. Embodiment 1

[0026] Embodiment 1 discloses a grinding and powdering device for processing chopped glass fiber materials. Referring to the attached Figure 1 drawings, its main body includes a columnar outer shell 1 arranged vertically. A control console 2 is connected to the lower end of the side surface of the columnar outer shell 1. A driving device 3 is arranged at the center of the top of the columnar outer shell 1. A feeding hopper 4 communicating with the inside is arranged beside the driving device 3. Finally, a protruding blanking guide plate 5 is arranged at the lower end of the columnar outer shell 1.

[0027] Referring to the attached Figures 3 to 6, an external grinding ring block 6 is fixed at the upper end of the inner wall of the columnar housing 1. The inner circumferential wall of the external grinding ring block 6 is sequentially connected from top to bottom by an upper ring surface 601, a first conical surface 602, a grinding groove surface 603, a second conical surface 604, and a lower ring surface 605. A rotating disk 7 is arranged in the inner circle of the external grinding ring block 6 flush with the grinding groove surface 603. Then, a plurality of grinding wheels 701 are circumferentially and evenly rotatably connected in the outer circular surface of the rotating disk 7. The number of grinding wheels 701 is determined according to the size of the rotating disk 7, generally set between 8 and 20. The plurality of grinding wheels 701 extend into the grinding groove surface 603 and cooperate with it to complete the grinding process of the chopped glass fiber material. A rotating support 8 is fixedly connected to the lower ring surface 605 below the rotating disk 7. A grinding rotating shaft 9 concentrically connected to the rotating disk 7 is rotatably arranged in the rotating support 8, and the top of the grinding rotating shaft 9 passes through the columnar housing 1 and extends into the driving device 3 for transmission connection therewith.

[0028] An eccentric material spreading disk 10 flush with the upper ring surface 601 is arranged in the external grinding ring block 6. A hollow rotating shaft 11 connected to the center of the eccentric material spreading disk 10 passes through the columnar housing 1 and extends into the driving device 3, and the grinding rotating shaft 9 passes through the inner cavity of the hollow rotating shaft 11. In order to enable the driving device 3 to drive the rotating disk 7 and the eccentric material spreading disk 10 to rotate synchronously and in opposite directions, a first bevel gear 111 is connected to the end of the hollow rotating shaft 11 extending into the driving device 3, and a second bevel gear 901 is connected to the end of the grinding rotating shaft 9 extending out of the hollow rotating shaft 11. Then, the driving device 3 is composed of a transmission box and a motor, and a vertical bevel gear meshing with both the first bevel gear 111 and the second bevel gear 901 is arranged at the inner end of the motor shaft extending into the transmission box.

[0029] A circular plate 12 is concentrically arranged in the external grinding ring block 6 below the eccentric material spreading disk 10, and the diameter of the circular plate 12 is set to be smaller than that of the eccentric material spreading disk 10 to prevent the chopped glass fiber material from falling from the eccentric material spreading disk 10 onto the circular plate 12. The circular plate 12 is fixedly connected to the lower end of the upper ring surface 601 through a plurality of radial connecting rods 121 in the circumferential direction. Then, a plurality of through holes 122 are evenly formed at the outer edge of the circular plate 12. A pressing and cutting material discharging ring 13 flush with the first conical surface 602 is concentrically arranged in the external grinding ring block 6. The outer circular side of the pressing and cutting material discharging ring 13 corresponding to the first conical surface 602 is also set as a conical surface, and a plurality of ring knives 131 perpendicular to the first conical surface 602 are fixed on the conical surface of the pressing and cutting material discharging ring 13 (refer to Appendix Figure 7 and Appendix Figure 8). A plurality of first springs 14 are evenly connected between the blanking ring 13 and the circular plate 12. Then, a guide post 132 passing through the through hole 122 is connected to the upper surface of the blanking ring 13, and a roller 133 radially outward is rotatably connected to the top of the guide post 132. At the same time, a ring plate 101 extends downward on the outer circumferential surface of the centrifugal feeding disc 10, and a guiding closed-loop groove interacting with the roller 133 is formed on the inner circumferential wall of the ring plate 101. The guiding closed-loop groove 102 is composed of a plurality of horizontal arc segments 102 and a plurality of concave segments 103 connected in sequence.

[0030] Finally, a converging hopper is fixedly arranged inside the columnar housing 1 directly below the outer grinding ring block 6, and the inner end of the blanking guide plate 5 is arranged directly below the converging hopper.

[0031] When the pulverizing device disclosed in this Embodiment 1 is used for processing glass fiber short cut materials, the glass fiber short cut materials are put into the feeding hopper 4 by a hoist and fall onto the upper surface of the centrifugal feeding disc 10 under the guiding action of the feeding hopper 4. At the same time, the driving device 3 drives the centrifugal feeding disc 10 and the outer grinding ring block 6 to rotate in opposite directions. During the rotation of the centrifugal feeding disc 10, the glass fiber short cut materials will fall into the annular gap between the outer grinding ring block 6 and the centrifugal feeding disc 10 under the action of centrifugal force and fall along the first conical surface 602 towards the grinding groove surface 603. However, since the glass fiber short cut materials are filamentous materials with a certain length, it is difficult to directly roll down along the first conical surface 602. At this time, since the ring plate 101 rotates synchronously with the centrifugal feeding disc 10, the interaction between the guiding closed-loop groove 102 and the roller 133 will cause the blanking ring 13 to move up and down reciprocally. During the downward movement of the blanking ring 13, on the one hand, the plurality of ring knives 131 on its outer circumferential surface will press the glass fiber short cut materials downward, and on the other hand, they will cooperate with the first conical surface 602 to press the glass fiber short cut materials into a shorter material state, so that the glass fiber short cut materials can smoothly fall into the grinding groove surface 603. At this time, under the action of the high-speed rotating grinding wheel 701 and the grinding groove surface 603, they are ground into powder. Finally, the powder material falls from the lower end of the outer grinding ring block 6 and falls onto the blanking guide plate 5 under the action of the converging hopper, and finally the blanking guide plate 5 discharges it from the columnar housing 1 for collection. Embodiment 2

[0032] Embodiment 2 discloses a glass fiber short cut material pulverizing device which is further optimized on the basis of the technical solution in Embodiment 1, and the same parts as those in Embodiment 1 will not be described again.

[0033] Refer to the attached Figure 1 、attached Figure 3 、attached Figure 9 and attached Figure 10, in the present Embodiment 2, a screening mechanism 15 is provided inside the columnar housing 1 directly below the external grinding ring block 6 to replace the converging hopper, and the blanking guide plate 5 is arranged directly below the screening mechanism 15. Meanwhile, the coarse material outlet end of the screening mechanism 15 is connected to a return auger device 16 located outside the columnar housing 1.

[0034] Specifically, the screening mechanism 15 includes a mesh sieve hopper 151 fixedly connected to the lower end of the external grinding ring block 6. A large number of sieve holes are formed on the conical surface of the mesh sieve hopper 151, and a telescopic inner tube 152 is connected to the center of the mesh sieve hopper 151. An outer telescopic tube 153 that sleeves the mesh sieve hopper 151 inside is connected to the outer circumferential surface at the top of the mesh sieve hopper 151. A funnel-shaped guide hopper 154 is connected to the lower end of the telescopic outer tube 153, and the lower opening of the guide hopper 154 is arranged directly facing the blanking guide plate 5. A vertical downward sliding rod 155 is arranged at the top of the mesh sieve hopper 151, and the lower end of the sliding rod 155 penetrates through the outer edge of the guide hopper 154. Then, a second spring 156 is sleeved outside the sliding rod 155, and both ends of the second spring 156 are respectively connected to the mesh sieve hopper 151 and the guide hopper 154.

[0035] A downwardly inclined coarse material discharge pipe 157 is connected to the lower end of the telescopic inner tube 152. The lower end of the coarse material discharge pipe 157 extends out of the guide hopper 154, and the lower end of the coarse material discharge pipe 157 is connected to the lower feed inlet of the return auger device 16 through a hose. Meanwhile, a downwardly inclined return pipe 161 is connected to the upper end of the return auger device 16, and the end of the return pipe 161 passes through the top wall of the columnar housing 1 and is arranged towards the upper surface of the centrifugal spreading disk 10.

[0036] Finally, a telescopic driving member 17 is arranged on the bottom wall of the columnar housing 1. Specifically, the telescopic driving member 17 can be one of a cylinder, a hydraulic cylinder, or an electric pusher. The upper end of the telescopic driving member 17 penetrates through the blanking guide plate 5 and extends into the guide hopper 154. Then, a conical block 18 is connected to the top end of the telescopic driving member 17. The lower conical surface of the conical block 18 fits with the inner conical surface of the guide hopper 154, and its upper end is arranged in a conical shape.

[0037] During the processing of the glass fiber chopped stock grinding device disclosed in this Embodiment 2, the powder material falling from the lower end of the outer grinding ring block 6 directly falls into the mesh sieve hopper 151, and then gathers towards the telescopic inner tube 152 at the center along the surface of the mesh sieve hopper 151. At this time, the finely ground powder that has been completely ground can pass through the sieve holes on the surface of the mesh sieve hopper 151 and fall into the material guiding hopper 154, and then fall into the blanking guide plate 5 through the material guiding hopper 154. Finally, the blanking guide plate 5 discharges it to the columnar housing 1 for collection; while the unground glass fiber coarse material converges into the telescopic inner tube 152, and then enters the return auger device 16 along the coarse material discharge pipe 155. Then, the return auger device 16 lifts it upward, and finally discharges it to the upper surface of the centrifugal spreading disc 10 again through the return pipe 161 for secondary grinding processing.

[0038] In addition, after the entire grinding device operates for a period of time, the telescopic driving member 17 is started once. When the telescopic driving member 17 operates, it first controls itself to shorten, thereby pulling the conical block 18 downward. During the downward movement of the conical block 18, it first fits with the inner wall of the material guiding hopper 154 to seal the lower end, and then stretches the telescopic outer tube 153 downward to increase its internal volume and reduce the pressure. At this time, some sieve holes on the mesh sieve hopper 151 blocked by powder can be automatically unclogged under the negative pressure. After the unclogging is completed, control the telescopic driving member 17 to extend and reset until the conical block 18 separates from the material guiding hopper 154 to form a normal blanking channel.

[0039] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A glass fiber chopped strand grinding device, comprising a columnar outer shell, wherein a feeding hopper is arranged at the upper end of the columnar outer shell, and a blanking guide plate is arranged at the lower end, and is characterized in that, An external grinding ring block is fixed on the inner wall of the columnar housing, and the inner circumferential wall of the external grinding ring block is sequentially connected from top to bottom by an upper ring surface, a first conical surface, a grinding groove surface, a second conical surface and a lower ring surface. An eccentric material spreading disc, a cutting and blanking ring and a rotating disc are concentrically arranged inside the external grinding ring block and are flush with the upper ring surface, the first conical surface and the grinding groove surface respectively. A driving device for driving the eccentric material spreading disc and the rotating disc to rotate is arranged on the columnar housing, and a grinding wheel acting on the grinding groove surface is arranged on the rotating disc. A circular plate fixedly connected with the columnar housing is concentrically arranged between the eccentric material spreading disc and the cutting and blanking ring, and through holes are formed in the circular plate. A first spring is connected between the cutting and blanking ring and the circular plate, and a guide post penetrating through the through hole is connected to the upper surface of the cutting and blanking ring. The upper end of the guide post is connected with a roller. A ring plate extending downward is arranged on the eccentric material spreading disc, and a guide closed loop groove acting on the roller is formed in the ring plate. The guide closed loop groove is sequentially connected by a horizontal arc section and a concave section. A ring knife perpendicular to the first conical surface is arranged on the cutting and blanking ring.

2. The glass fiber chopped strand grinding device according to claim 1, wherein The lower end of the external grinding ring block is connected with a screening mechanism. The blanking guide plate is arranged directly below the fine material outlet of the screening mechanism. The coarse material outlet end of the screening mechanism is connected with a return auger device located outside the columnar housing, and the upper end of the return auger device is connected with a return pipe facing the upper surface of the eccentric material spreading disc.

3. The glass fiber chopped stock grinding device according to claim 2, characterized in that, The screening mechanism includes a mesh sieve hopper fixedly connected to the lower end of the external grinding ring block. An expansion outer tube is connected to the outer side of the mesh sieve hopper. The lower end of the expansion outer tube is connected with a guide hopper. A telescopic inner tube is connected to the center of the mesh sieve hopper, and a coarse material discharge pipe connected with the return auger device is arranged at the lower end of the telescopic inner tube.

4. The glass fiber chopped stock grinding device according to claim 3, characterized in that, A slide bar and a second spring are connected between the guide hopper and the upper end of the mesh sieve hopper. A conical block is arranged in the guide hopper, and the lower conical surface of the conical block is attached to the inner conical surface of the guide hopper. A telescopic driving part for moving the conical block up and down is arranged at the bottom of the columnar housing.

5. The glass fiber chopped stock grinding device according to claim 1, characterized in that, A rotating bracket fixedly connected with the lower ring surface is arranged in the external grinding ring block. A grinding rotating shaft is concentrically arranged on the rotating disc. The lower end of the grinding rotating shaft is connected with the rotating bracket, and the upper end extends into the driving device. A hollow rotating shaft with the upper end extending into the driving device is concentrically arranged on the eccentric material spreading disc, and the grinding rotating shaft penetrates through the hollow rotating shaft.

6. The chopped glass fiber powder grinding device according to claim 5, characterized in that, The driving device includes a transmission box and a motor. A second bevel gear is arranged at the end of the grinding rotating shaft extending into the transmission box. A first bevel gear is arranged at the end of the hollow rotating shaft extending into the transmission box. A vertical bevel gear meshing with both the first bevel gear and the second bevel gear is arranged on the motor shaft of the motor.

7. The glass fiber chopped stock grinding device according to claim 1, characterized in that, The circular plate is fixedly connected with the lower end of the upper ring surface through a plurality of radial connecting rods. The plurality of through holes are uniformly arranged along the outer edge of the circular plate. A plurality of guide posts penetrating through the corresponding through holes are uniformly arranged on the upper surface of the cutting and blanking ring, and a roller radially outward is rotatably connected to the top of each guide post.

8. The chopped glass fiber powder grinding device according to claim 7, characterized in that, The ring plate extends downward from the outer circular surface of the centrifugal material scattering disc, and the guiding closed-loop groove is composed of a plurality of horizontally curved segments and a plurality of concave segments connected in sequence.

9. The glass fiber chopped stock grinding device according to claim 1, characterized in that, The outer circular side of the pressure-cutting and blanking ring opposite to the first conical surface is arranged as a conical surface, and a plurality of the ring knives are fixedly arranged at intervals on the conical surface of the pressure-cutting and blanking ring.

10. The glass fiber chopped stock grinding device according to claim 1, characterized in that, A plurality of grinding wheels are provided, and the plurality of grinding wheels are circumferentially and evenly arranged on the outer circular surface of the turntable.

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