CN114985120B

CN114985120B - Centrifugal machine for dental 3D printing resin separation

Info

Publication number: CN114985120B
Application number: CN202210643871.XA
Authority: CN
Inventors: 刘大鹏
Original assignee: Shanghai Maiya Technology Co ltd
Current assignee: Shanghai Maiya Technology Co ltd
Priority date: 2022-06-08
Filing date: 2022-06-08
Publication date: 2024-04-05
Anticipated expiration: 2042-06-08
Also published as: CN114985120A

Abstract

The invention discloses a centrifugal machine for separating dental 3D printing resin, and belongs to the technical field of centrifugal machines. The centrifugal machine comprises a base, a damping mechanism, a centrifugal cylinder, a separating mechanism, a power mechanism, a brake mechanism and a positioning component, wherein the damping mechanism is arranged on the base and is connected with a damping disk; the centrifugal barrel is used for receiving the separated resin; the separation mechanism is positioned in the centrifugal cylinder, a main shaft is connected to the separation mechanism, and the main shaft is rotatably arranged on the damping disc; the power mechanism is arranged on the damping disc and used for driving the main shaft to rotate, and the main shaft drives the separating mechanism to rotate; the brake mechanism is arranged on the damping disc and used for controlling the main shaft to stop rotating; the positioning component comprises a first positioning component and a second positioning component and is used for detecting the rotation angle of the main shaft. The centrifugal machine can meet the requirements of resin separation procedures during mass production of dental model 3D printing.

Description

Centrifugal machine for dental 3D printing resin separation

Technical Field

The invention relates to the technical field of centrifuges, in particular to a centrifuger for separating dental 3D printing resin.

Background

The 3D printing technology is widely applied to the field of dental correction, and in order to manufacture appliance dental models in batches, the prior art carries out large-scale production in an automatic assembly line mode. In the 3D printing process of the appliance dental cast, a plurality of printed appliance dental cast are usually carried on the same tray, and then blanking and conveying are carried out on the tray along with the whole tray in a production line so as to facilitate the next procedure. The 3D printed dental model has a large amount of resin material attached to the surface, and needs to be removed in advance to prepare for others.

At present, for removing resin on the surface of a 3D printing product, a commonly used method is to put a 3D printed model into a centrifugal machine by adopting a centrifugal method, and throw out the resin on the surface of the model in a centrifugal mode, so that the purpose of removing the resin is achieved. However, the tray carrying the dental casts is usually supported by a metal material, in order to be able to print a plurality of dental casts in the same dental cast tray, it is necessary to ensure that the tray has a sufficient surface area and a certain thickness, so that the weight of the tray is relatively large, and the weight of each dental cast tray is usually tens or even tens of kilos, so that the requirement on the centrifuge is high. However, in a large-scale dental model 3D printing process, it is difficult for the existing centrifuge to meet the working requirements of dental model resin separation, and for this purpose, a centrifuge for dental 3D printing resin separation was designed.

Disclosure of Invention

The invention provides a centrifugal machine for separating dental 3D printing resin, which is used for meeting the requirement of resin separation in a large-scale dental model 3D printing process.

To achieve the above object, the present invention provides a centrifuge for dental 3D printing resin separation, comprising:

a base;

the damping mechanism is arranged on the base and is connected with a damping disc;

a centrifugal cartridge for receiving the separated resin;

the separation mechanism is positioned in the centrifugal cylinder, a main shaft is connected to the separation mechanism, and the main shaft is rotatably arranged on the damping disc;

the power mechanism is arranged on the damping disc and used for driving the main shaft to rotate, and the main shaft drives the separating mechanism to rotate;

the brake mechanism is arranged on the damping disc and used for controlling the main shaft to stop rotating;

and the positioning component comprises a first positioning component and a second positioning component and is used for detecting the rotation angle of the main shaft.

Further, the separating mechanism comprises a chassis, a plurality of connecting columns and a plurality of limiting plates, wherein the chassis and the limiting plates or the limiting plates and the limiting plates are connected through the connecting columns, and the main shaft is connected with the chassis.

Further, a plurality of limiting grooves are formed in the limiting disc, the limiting grooves are connected end to form a regular polygon, and the limiting grooves are symmetrically arranged along the center of the axis of the limiting disc.

Further, the upper surface of chassis is equipped with many first spacing grooves, place the tooth mould charging tray in the spacing recess after, the base edge of tooth mould charging tray is in first spacing groove, the side edge of tooth mould charging tray is in the spacing recess of each spacing dish.

Further, a plurality of limiting blocks are arranged between the chassis and the limiting disc adjacent to the upper side of the chassis, a second limiting groove is formed in the surface of each limiting block in the vertical direction, and after the dental model material disc is placed in each limiting groove, the side edge of the dental model material disc is positioned in the second limiting groove.

Further, a plurality of first limiting parts are arranged at the positions of each limiting groove, each first limiting part comprises a first limiting head and a first limiting spring, limiting holes are formed in the limiting plates, the first limiting springs are arranged in the limiting holes, one ends of the first limiting springs are fixed in the limiting holes, the other ends of the first limiting springs are connected with the first limiting heads, and one part of each first limiting head extends out of each limiting hole and is in abutting contact with the dental model material plates.

Further, a supporting disc is arranged on the damping disc through a plurality of supporting columns, a bearing is arranged between the main shaft and the centrifugal cylinder, and the bearing is in contact with the supporting disc. The brake mechanism comprises a brake disc, a brake, a control element and a first driving piece, wherein the brake disc is arranged on the main shaft, the brake, the control element and the first driving piece are arranged on the damping disc, and when the brake is carried out, the brake is meshed with the brake disc to stop the main shaft.

Further, the first positioning component is an encoder, the encoder is arranged at the lower end of the main shaft, the second positioning component comprises a code disc and a photoelectric switch, the code disc is arranged on the main shaft, the photoelectric switch is arranged on the damping disc, and the photoelectric switch determines the rotation angle of the main shaft by detecting the code disc.

Further, the centrifugal machine further comprises a shell and a cover body, wherein the shell is hinged with the cover body, and the centrifugal cylinder is arranged on the shell.

The beneficial effects are that: the centrifugal machine provided by the invention comprises a base, a damping mechanism, a centrifugal cylinder, a separating mechanism, a power mechanism, a brake mechanism and a positioning component, when large-scale dental cast resin separation is carried out, a large number of dental cast trays are placed in the separating mechanism, the separating mechanism is driven to rotate by the power mechanism, and excessive resin on dental cast is thrown out by utilizing centrifugal force, so that resin separation is realized. The separating mechanism utilizes the chassis and the limiting plate, the weight can be greatly reduced through the structural form of the combined connection of the connecting columns, a plurality of trays can be placed in the separating mechanism, the eccentricity of the structural form of the separating mechanism can be reduced as much as possible, the separating mechanism is stable, and the separating mechanism is suitable for large-scale production. In addition, the brake mechanism can enable the centrifugal machine to brake at any time, so that the feeding and discharging of the centrifugal machine are convenient, and meanwhile, the centrifugal machine can be stopped in time when in fault. Simultaneously, still set up positioning component, this positioning component has first positioning component and second positioning component, through twice detection, can carry out more accurate testing point position to the rotation angle of separation mechanism, the material loading of being convenient for more and unloading. Through the structure, the centrifugal machine is more suitable for mass production and resin separation of dental molds.

Drawings

Fig. 1 is a schematic perspective view of a part of the structure (hidden part of the casing) of a centrifuge according to a preferred embodiment of the present invention.

Fig. 2 is a schematic plan view of the internal structure of the centrifuge.

Fig. 3 is an enlarged view of a portion of fig. 2 at a (hidden support column).

Fig. 4 is a partial enlarged view at B in fig. 2.

Fig. 5 is a schematic view of the structure of the separating mechanism with the dental model trays placed therein.

Fig. 6 is a schematic view of the structure of the separating mechanism without the dental model trays.

Fig. 7 is a partial enlarged view at C in fig. 6.

Fig. 8 is a partial enlarged view at D in fig. 6.

Fig. 9 is a schematic structural view of the connection column.

Fig. 10 is a schematic structural view of the first stopper.

Fig. 11 is a schematic plan view of the stopper plate.

Fig. 12 is a schematic plan view of the chassis.

Reference numerals: 100. a base; 110. a damping disc; 111. a support column; 112. a support plate; 113. a reinforcing column; 114. a cross column; 115. a first telescopic member; 200. a housing; 210. a cover body; 220. a centrifugal barrel; 221. a resin outlet; 214. a telescoping member; 300. a damping mechanism; 400. a power mechanism; 421. a main shaft; 422. a second transmission pulley; 423. a first drive pulley; 424. a plurality of wedge belts; 425. a second bearing; 426. a first bearing; 500. a brake mechanism; 510. a brake disc; 520. a brake; 530. a control element; 540. a first driving member; 600. a separation mechanism; 610. a chassis; 611. a first limit groove; 612. a limiting block; 6121. the second limit groove; 620. a limiting disc; 621. a limit groove; 622. a first limiting member; 6221. a first positioning head; 6222. a first limit spring; 623. a limiting hole; 630. a connecting column; 631. an external thread; 632. an internal thread; 633. a boss; 710. an encoder; 720. an optoelectronic switch; 730. a code wheel; 800. tooth mould charging tray.

Detailed Description

The technical solution of the present invention will be more clearly and completely explained by the description of the preferred embodiments of the present invention with reference to the accompanying drawings.

As shown in fig. 1, the centrifuge according to the present invention includes a base 100, a housing 200, a centrifuge bowl 220, a cover 210, a power mechanism 400, a shock absorbing mechanism 300, a braking mechanism 500, and a separating mechanism 600. The centrifugal cylinder 220 is a cylindrical structure having only a lower bottom surface and no upper bottom surface, and is fixedly coupled to the housing 200.

As shown in fig. 1 and 2, the base 100 has a plate shape, the damper mechanism is provided on the base, and the damper disc 110 is provided at an upper end of the damper mechanism. The damping mechanism 300 may be a spring damper or a hydraulic damper, and the damping mechanism 300 is disposed vertically as a whole and has a plurality of damping mechanisms. The top and bottom of the shock absorbing mechanism 300 are fixedly coupled to the lower surface of the shock absorbing disc 110 and the upper surface of the base 100, respectively. The power mechanism 400, the brake mechanism 500, and the separation mechanism 600 are mounted on the damper disc 110. The shock absorbing mechanism 300 can prevent vibration from being directly transmitted to the base 100 and the housing 200 when the power mechanism 400, the brake mechanism 500, the separation mechanism 600, and the like are operated, and the shock absorbing mechanism 300 is used to absorb vibration to the base 100 and the housing 200.

As shown in fig. 2 and 3, the power mechanism 400 includes a main shaft 421, a motor, and a transmission mechanism. The motor is fixed to the damper disc 110 and may be a general motor or a servo motor. The spindle 421 may be coupled to the damper disc 110 through a first bearing 426, and the first bearing 426 may be a bearing set composed of a pair of bearings. Similarly, the top position of the spindle 421 is connected to the lower bottom surface position of the centrifugal cylinder 220 via a second bearing 425, and the spindle 421 rotates with respect to the centrifugal cylinder 220 via a bearing. The top of the spindle 421 penetrates the lower bottom surface of the centrifugal cylinder 220, the separation mechanism 600 is fixed at the top position of the spindle 421 by a flange, the whole separation mechanism 600 is positioned in the cylinder of the centrifugal cylinder 220, and the separation mechanism 600 rotates synchronously with the rotation of the spindle 421. After the separation mechanism 600 is rotated by the power mechanism 400, the excessive resin is thrown to the inner wall of the centrifugal barrel 220 and finally discharged from the resin outlet 221 at the bottom of the centrifugal barrel 220.

The transmission mechanism can adopt belt transmission, chain transmission, gear transmission and the like, in the embodiment, a multi-wedge belt 424 is adopted, a first transmission belt pulley 423 is arranged on a rotating shaft of the motor, a second transmission belt pulley 422 is arranged on the main shaft 421, the rotating shaft of the motor drives the main shaft 421 and the separation mechanism 600 connected with the main shaft 421 through flanges to rotate sequentially through the first transmission belt pulley 423, the multi-wedge belt 424 and the second transmission belt pulley 422, and the purpose of separating resin is achieved.

As shown in fig. 2, considering that the overall weight of the separating mechanism 600 after the dental model tray 800 is carried is large, several tens or even hundreds of jin, a plurality of support columns 111 are fixed on the upper surface of the damping disk 110 in the vertical direction, the support disks 112 are commonly fixed on top of the plurality of support columns 111, and the second bearings 425 are in contact with the upper surface of the support disks 112. The centrifuge main shaft 421 passes through the supporting disc 112, and the supporting disc 112 not only can limit the bearing position between the centrifuge tube and the main shaft 421, but also can play a certain limiting role on the main shaft, so as to avoid the main shaft disturbance caused by overlarge mass of the separating mechanism when the whole separating mechanism is supported by one main shaft.

As shown in fig. 2 and 4, the positioning member is positioned at the bottom of the spindle 421, wherein in this embodiment, the positioning member includes a first positioning member and a second positioning member for detecting the rotation angle of the spindle 421. The first positioning device is an encoder 710, a shaft of the encoder 710 is coaxially connected with the spindle 421, and when the spindle 421 rotates, the encoder 710 feeds back a signal to a control system of the centrifugal machine. The second positioning component comprises a photoelectric switch 720 and a code disc 730, the code disc 730 is arranged on the main shaft 421, when the photoelectric switch 720 scans convex teeth or grooves at the side edge of the code disc 730, signals are fed back to a control system of the centrifugal machine, and the main shaft can be rotated to be more accurately positioned in a rotating mode through the first positioning component and the second positioning component, so that the control system of the centrifugal machine can control the brake mechanism 500 according to two positioning signals, and the separating mechanism is stopped at a specific position, so that feeding and discharging of the separating mechanism are facilitated.

Although the rotation of the spindle 421 is positioned, the rotation of the separating mechanism 600 fixedly connected to the spindle 421 is actually positioned. Because in the separating mechanism 600, a plurality of dental model trays 800 are usually placed, and the plurality of dental model trays 800 are loaded at a specific angle, and when the dental model trays 800 are loaded, they are loaded one by one, and when one is loaded, they are rotated at a specific angle, and then loaded. And because the weight ratio of separating mechanism 600 is great, when rotation angle, can lead to the pivoted angle inaccurate because of factors such as inertia to the charging tray at the back is difficult to put into accurately, consequently cooperates through two locating part, makes separating mechanism 600 can rotate accurate position, and in time brake stall by brake mechanism 500, makes things convenient for loading and unloading.

As shown in fig. 3, the brake mechanism 500 includes a brake disc 510, a brake 520, a control element 530, and a first driver 540. The brake disc 510 is arranged on the spindle 421, the brake disc 510 is always in the engagement area of the brake 520, and the brake 520, the control element 530, and the first driver 540 are all on the damper disc 110. In the present invention, the hydraulic brake 520 is used as the brake 520, the first driving member 540 may be a thin cylinder, and the control member 530 may be a piston valve. When braking, the thin cylinder stretches out to jack the piston valve, then hydraulic oil enters the brake 520, and the brake 520 is meshed with the brake pad, so that braking is performed, and the separation mechanism 600 stops rotating.

The support column 111 is designed to avoid the position of the brake mechanism 500, and to reserve enough space for the brake mechanism 500.

As shown in fig. 1, two reinforcement columns 13 are provided with a cross column 114, a cover 210 is hinged above a housing 200 by a hinge, a first telescopic member 115 is jointly arranged between the cross column 114 and the lower surface of the cover 210, the first telescopic member 115 can be an electric push rod, one end of the first telescopic member 115 is hinged on the cover 210, the other end is hinged on the cross column 114, when the first telescopic member 115 extends, the cover 210 is opened, and when the first telescopic member 115 retracts, the cover 210 is closed.

The separation mechanism 600 is a core design point of the present invention, and is specifically designed for mass production. The design points are as follows: 1. the centrifuge has stable working capacity on the premise that the dental model supporting plate has large weight. 2. The tooth die supporting plate is guaranteed to be stable when the centrifugal machine works, and the eccentric working condition of the centrifugal machine can not occur.

As shown in fig. 1 and 5-12, the separating mechanism 600 is approximately cylindrical in shape, and the axes of the separating mechanism 600 and the centrifugal barrel 220 are all in the vertical direction and are collinear with each other. The separation mechanism 600 includes a chassis 610, a plurality of limiting plates 620 sequentially arranged along the vertical direction, and a plurality of connecting posts 630 capable of being detachably connected with each other. The bottom plate 610 is at the bottom, and the bottom is connected to the spindle 421 through a flange. Both the bottom plate 610 and the limit plate 620 may be circular; the connecting column 630 has a cylindrical structure, and is provided with an internal thread 632 at one end and an external thread 631 at the other end, and a cylindrical boss 633 at one end of the external thread 631. During assembly, the connection post 630 passes through the limit plate 620, the limit plate 620 is in contact with the boss 633, then the external thread 631 is connected with the internal thread 632 of the other connection post 630, and meanwhile, the end surface of the other connection post 630 presses the limit plate 620, so that the limit plate 620 is fixed. The external threads 631 on the uppermost coupling post 630 may be directly screwed with the uppermost limit plate 620, and the internal threads 632 on the lowermost coupling post 630 may be engaged with a corresponding type of bolt, directly coupled to the base plate 610 using the bolt. The assembled separation mechanism is shown in fig. 6.

As shown in fig. 5, 6, 7 and 11, a plurality of limiting grooves 621 are provided on each limiting plate 620, and the plurality of limiting grooves 621 are symmetrically distributed along the center point of the limiting plate 620. Moreover, the planar shape of the plurality of limiting grooves 621 formed by connecting the end to end is a regular polygon, such as a regular triangle, a regular quadrangle or a regular pentagon, etc. The present embodiment adopts a regular quadrangle. When each dental cast tray is vertically placed into the separating mechanism 600, the side edges of the dental cast tray are contacted with the side edges of the limiting grooves 621 in the same vertical direction on each limiting tray, and the dental cast tray is limited by the limiting grooves. The reason of this design is also because the weight of tooth mould charging tray is very big, makes every tooth mould charging tray along the center of spacing dish 620, is central symmetry setting, just makes each tooth mould charging tray be regular polygon and places yet, and weight distribution is even, just is in order to prevent the eccentric work's of centrifuge production during operation condition, and tooth mould charging tray is regular polygon and places, guarantees the stable, the reliable operation of centrifuge.

As shown in fig. 6 and 8, a plurality of stoppers 612 are provided between the chassis 610 and a stopper plate 620 adjacent to the upper side thereof. The second limiting groove 6121 is formed on the surface of the limiting block 612 along the vertical direction, and after the dental model trays are vertically placed into the limiting grooves 621 of the limiting trays 620, the position of the lateral edge of the dental model tray, which is close to the bottom, is located in the second limiting groove 6121. Meanwhile, a first limit groove 611 is formed on the upper surface of the chassis 610, and second limit grooves 6121 on two adjacent limit blocks 612 face the first limit groove 611, and the second limit grooves 6121 on two adjacent limit blocks are respectively connected with two ends of the first limit groove 611. After the foregoing dental model trays are vertically placed into the limiting grooves 621 of the respective limiting trays 620, the bottom edges of the dental model trays are positioned in the first limiting grooves 611. Because the plurality of limiting grooves 621 are designed as regular polygons, the shape of each first limiting groove 611 on the upper surface of the chassis 610 is also naturally regular polygons corresponding to the limiting grooves 621. The lower side position of the dental model tray is limited by the first limit groove 611 and the second limit groove 6121, so that the stability and the reliability of the separating mechanism 600 when working in a heavy-weight environment are improved.

In addition, as shown in fig. 7 and 10, a plurality of first limiting members 622 are further disposed on the limiting plate 620, the first limiting members 622 are disposed in the respective limiting grooves 621, and the first limiting members 622 may be disposed in a central symmetry along the center of the limiting plate 620. Because the tooth mould charging tray inserts in the spacing recess 621, there is little clearance between tooth mould charging tray and the spacing dish, but separating mechanism when rotatory, tooth mould charging tray can take place to rock because the existence of clearance, through setting up first locating part 622, withstands a surface of tooth mould charging tray after tooth mould charging tray inserts, avoids tooth mould charging tray to rock because the existence of clearance for centrifugal process is more stable.

As shown in fig. 10, the first limiting member 622 includes a first limiting head 6221 and a first limiting spring 6222, and the limiting plate 620 is provided with a limiting hole 623, where the limiting hole 623 is disposed along a horizontal direction. The first spacing spring 6222 is disposed in the spacing hole 623, one end of which is fixed in the spacing hole 623, and the other end of which is fixedly connected to the first spacing head 6221. When the tray is inserted, the tray contacts the first spacing head 6221, the first spacing head 6221 is compressed into the spacing hole 623, and under the action of the spring force, the first spacing head 6221 is always pressed on the tray, thereby further spacing the tray.

The centrifugal machine designed for the resin separation process in the large-scale dental model 3D printing process comprises a base 100, a shell 200, a centrifugal barrel 220, a cover 210, a power mechanism 400, a damping mechanism 300, a brake mechanism 500 and a separation mechanism 600, and the design of each component, especially the design of the separation mechanism, can be simultaneously transferred into a large number of dental models, has good stability and can be applied to large-scale dental model production.

The above detailed description is merely illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention. Various modifications, substitutions and improvements of the technical scheme of the present invention will be apparent to those skilled in the art from the description and drawings provided herein without departing from the spirit and scope of the invention. The scope of the invention is defined by the claims.

Claims

1. A centrifuge for dental 3D printing resin separation, comprising:

a base;

a centrifugal cartridge for receiving the separated resin;

the separating mechanism is positioned in the centrifugal barrel, the main shaft is connected to the separating mechanism, the main shaft is rotationally arranged on the damping disc, the separating mechanism comprises a chassis, a plurality of connecting columns and a plurality of limiting discs, the chassis, the limiting discs or the limiting discs and the limiting discs are connected through the connecting columns, the main shaft is connected with the chassis, a plurality of limiting grooves are formed in the limiting discs, the limiting grooves are connected end to end and encircle to form a regular polygon, the limiting grooves are symmetrically arranged along the axis center of the limiting discs, a plurality of first limiting grooves are formed in the upper surface of the chassis, after the dental mould material discs are placed in the limiting grooves, the bottom edge of the dental mould material discs is positioned in the first limiting grooves, the side edge of the dental mould material discs is positioned in the limiting grooves of the limiting discs, a plurality of limiting blocks are arranged between the chassis and the limiting discs adjacent to the upper side of the chassis, the limiting blocks are provided with second limiting grooves along the vertical direction, and after the dental mould material discs are placed in the limiting grooves, the side edges of the dental mould material discs are positioned in the second limiting grooves;

2. The centrifuge for separating dental 3D printing resin according to claim 1, wherein a plurality of first limiting members are provided at each of the limiting groove positions, each of the first limiting members comprises a first limiting head and a first limiting spring, a limiting hole is provided in the limiting plate, the first limiting springs are disposed in the limiting holes, one end of each of the first limiting springs is fixed in the limiting hole, the other end of each of the first limiting springs is connected with the first limiting head, and a part of each of the first limiting heads extends out of the limiting hole and abuts against the dental model material plate.

3. The centrifuge for dental 3D printing resin separation according to claim 1, wherein a support disc is provided on the damping disc through a plurality of support columns, a bearing is provided between the spindle and the centrifuge tube, and the bearing is in contact with the support disc.

4. The centrifuge for dental 3D printing resin separation of claim 1, wherein the brake mechanism comprises a brake disc, a brake, a control element and a first driver, the brake disc being disposed on the spindle, the brake, the control element and the first driver being disposed on the damper disc, the brake engaging the brake disc to stall the spindle when braking.

5. The centrifuge for dental 3D printing resin separation according to claim 1, wherein the first positioning member is an encoder provided at a lower end of the spindle, the second positioning member includes a code wheel provided on the spindle and a photoelectric switch provided on the damper disc, and the photoelectric switch determines a spindle rotation angle by detecting the code wheel.

6. The centrifuge for dental 3D printing resin separation according to any one of claims 1 to 5, further comprising a housing and a cover, the housing being hinged to the cover, the centrifuge bowl being provided on the housing.