WO2016138857A1 - 3d printer - Google Patents

3d printer Download PDF

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Publication number
WO2016138857A1
WO2016138857A1 PCT/CN2016/075314 CN2016075314W WO2016138857A1 WO 2016138857 A1 WO2016138857 A1 WO 2016138857A1 CN 2016075314 W CN2016075314 W CN 2016075314W WO 2016138857 A1 WO2016138857 A1 WO 2016138857A1
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WO
WIPO (PCT)
Prior art keywords
tray
lever
printer
resin container
hinged
Prior art date
Application number
PCT/CN2016/075314
Other languages
French (fr)
Chinese (zh)
Inventor
蔡东濠
Original Assignee
蔡东濠
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Filing date
Publication date
Application filed by 蔡东濠 filed Critical 蔡东濠
Publication of WO2016138857A1 publication Critical patent/WO2016138857A1/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C67/00Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B33ADDITIVE MANUFACTURING TECHNOLOGY
    • B33YADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00Apparatus for additive manufacturing; Details thereof or accessories therefor

Definitions

  • the present invention relates to the field of three-dimensional printing technology, and in particular to a 3D printer.
  • Laser stereo printer that is, a 3D printer, must use a photosensitive resin as a curing material during operation, and the photosensitive resin used has a relatively high liquid concentration and viscosity.
  • the resin container containing the photosensitive resin and the modeling platform for modeling the product are in a state of being absolutely balanced and absolutely flat.
  • the surface of the resin container has a film of glue which is irradiated to the photosensitive resin when the film is level with the modeling platform.
  • the photosensitive resin needs to be layer-by-layer formed by laser irradiation layer by layer, it is necessary to raise the modeling platform in the Z-axis direction according to the thickness to be formed for each layer, so that the product to be printed has sufficient space to be cured layer by layer. forming.
  • the film on the surface of the container is forcibly pulled, causing the printing to fail, or causing structural damage to the 3D printer due to excessive long-term hard pulling.
  • the 3D printer can be used for a long time, and the success of the printed product becomes an urgent problem to be solved in the technical field.
  • the person skilled in the art generally directly uses a stepping motor with a screw rod to directly pull the modeling platform.
  • this method can achieve the desired separation effect, the stepping motor is very different in the case of different forces. Prone to "walking" The situation has greatly affected the accuracy of the printed products, and it also needs to be adjusted and maintained frequently, which causes considerable inconvenience to the user.
  • the mechanical structure of the 3D printer will also undergo large deformation, which will eventually lead to The chain reaction makes the printed products less than the required precision.
  • the above structure can only be applied to printing products of a small area, and since it is impossible to adjust the pulling force by itself, only one setting can be made.
  • the object of the present invention is to provide a 3D printer capable of achieving smooth separation of the film on the surface of the modeling platform and the resin container, and avoiding the film. It is easily damaged due to pulling, ensuring the accuracy and quality of printed products. And long-term use will not damage the overall structure of the 3D printer.
  • a 3D printer comprising a modeling platform and a resin container
  • the utility model further comprises: a tray fixedly connected to the resin container; a lever pulling device; an eccentric structure whose one end is hinged with a movable end of the lever pulling device; and the other end of the eccentric structure forms a moving pair with one side of the tray.
  • the lever traction structure includes a power unit, a transmission structure, and an execution structure.
  • the power device is one of a stepping motor, a servo motor, a DC motor, an AC motor, and a pneumatic motor.
  • the transmission structure is a gear transmission structure, and the gear transmission structure includes a driving gear coupled to the output end of the power unit and a driven gear engaged with the driving gear.
  • the execution structure includes a connecting rod, a fixing frame and a lever; a center of the driven gear is hinged to the fixing frame; one end of the connecting rod is hinged at a center of the proximal driven gear to obtain a larger Torque; one end of the lever is hinged to the other end of the connecting rod, the fulcrum of the lever is hinged to the fixed frame, and the other end of the lever serves as the movable end of the lever pulling device.
  • the eccentric structure is an unequal triangle, and one end of the unequal triangle has a hinge point hinged to the movable end of the lever pulling device, and the other end has at least two guide rods or sliders, and is movable
  • the ground is mounted in a chute or rail on one side of the fixed rack.
  • the positional relationship of the three corners of the unequal square is determined according to the length of the tray, the liquid concentration of the resin, the viscosity, and the positional relationship of the gear transmission structure.
  • a plurality of fixed shafts for supporting the tray are further included.
  • the moving pair is composed of one or more holes on one side of the tray hinged with the eccentric structure.
  • the lever pulling device of the 3D printer of the present invention can pull down the tray by the principle of the lever, thereby lowering the resin container, and then causing the left and right swings between the lowered resin container and the modeling platform by the eccentric structure, thereby The separation between the modeling platform and the surface of the resin container is further increased.
  • the driven gear, the connecting rod, the fulcrum of the fixing frame and the end of the lever actually constitute a link mechanism, and the stepping motor drives the driving gear to drive the driven gear to rotate one week.
  • the lever pulls the unequal triangle with the driven gear first pulls down the tray and then drives the tray to shake left and right under the action of the surface tension and adhesion of the film and the modeling platform, the modeling platform and After the film separation rises, the whole stroke is completed, the lever returns to the initial position, and the unequal triangle is driven, and then the tray is dragged to return to the horizontal state.
  • the "unloading force" buffer acts to avoid damage to the overall structure of the 3D printer due to repeated heavy traction.
  • the mobile pair one end of the eccentric structure is hinged to the lever pulling device and the other end forms a moving pair with one side of the tray), thereby moving the pull-up force to the side, causing the tray to be bent at a corner, and a certain resilience,
  • the tray will be pulled back to the original straight state, the whole process is to bring out the flexibility of the twisting, so that when printing a large flat product, the modeling platform can be angled with the resin container and the film on the resin container.
  • the motor and the entire structure achieve the finest strain and long machine life.
  • the motor can generate more tension with only a small gear.
  • the body size can be small but it can print larger workpieces than other brands.
  • FIG. 1 is a schematic view showing the composition of a direction of a 3D printer of the present invention, in which a Z-axis with a lead screw for adjusting the modeling platform 9 to slide up and down in a fixed plane is omitted.
  • FIG. 2 is a schematic view showing the composition of a partial perspective process in another direction of the 3D printer of the present invention.
  • FIG 3 is a schematic view showing the composition of the partial perspective processing in the other direction of the 3D printer of the present invention, and the position of the stepping motor 18 can be seen.
  • 4(a) is a cross-sectional view showing still another direction of the 3D printer of the present invention, in which the modeling platform and the resin container are in a parallel state.
  • Figure 4(b) A cross-sectional view of still another direction of the 3D printer of the present invention, wherein the modeling platform and the resin container have an angled inclination.
  • the 3D printer of the invention adopts a technology combining the central axis deviation and the lever swing unloading separation, and the specific working principle and structure thereof are as follows:
  • the working principle of the digital light processor 3D printer is to use a laser to layer the liquid photosensitive resin, so that the photosensitive resin in the resin container 8 is layer-by-layer cured on the surface of the modeling platform 9 on the vertical Z-axis.
  • the modeling platform 9 needs to drive the photosensitive resin which has just been cured in the previous layer to be separated from the surface film 13 of the resin container 8, and then rise to the level of the next layer that has been set.
  • the laser is then irradiated to the modeling substrate 9 to illuminate the liquid photosensitive resin to cure another layer, and so on. After multiple layers of curing, the product can be molded, and some products may be cured by up to 10,000 layers.
  • both the modeling platform 9 and the resin container 8 are capable of accurately printing in an absolute horizontal fit, but must be subjected to multiple steps of layer-by-layer separation and printing, to be successfully clutched without Breaking the surface film 13 of the resin container 8, Printing can be completed and is the core purpose of the present invention.
  • the structure of the 3D printer of the present invention comprises: a modeling platform 9 and a resin container 8; further comprising: a tray 6 fixedly connected to the resin container 8; a lever pulling device; and an eccentric structure hinged at one end to a movable end of the lever pulling device; The other end of the eccentric structure forms a moving pair with one side of the tray 6 (indicating that any two members remain in contact with each other and can move relative to each other in one direction).
  • the lever traction structure includes a stepping motor 18 as a power unit, a transmission structure, and an execution structure.
  • the transmission structure is a gear transmission structure including a driving gear 15 and a driven gear 16 connected to an output end of the stepping motor 18.
  • the execution structure includes a connecting rod 14, a fixing frame 17, and a lever 12; the center of the driven gear 16 is hinged to the fixing frame 17; one end of the connecting rod 14 is hingedly fixed to the center of the driven gear 16, and is specifically designed to ensure Under the premise that the moving gear 16 and the associated gear shaft do not suffer from breakage damage, the aforementioned hinge point is as close as possible to the axial center position of the driven gear 16.
  • One end of the lever 12 is hinged to the other end of the connecting rod 14, the fulcrum of the lever 12 is hinged to the fixed frame 17, and the other end of the lever 12 serves as the movable end of the lever pulling device.
  • the eccentric structure is an equilateral triangular plate 11 having a hinge point at one end and hinged with the movable end of the lever pulling device, and the other end has at least two guiding rods, and is movably mounted on the sliding groove on one side of the fixed frame.
  • the unequal triangle plate 11 is for twisting the bottom plate of the tray 6, so the length of the upper side of the unequal triangle plate 11 is not too short, and the tray is made of 2 mm thick stainless steel, which is about 6:1, that is, the unequal triangle plate 11
  • the length of the upper side is about 1/6 of the bottom plate of the tray 6.
  • the positional relationship of the three corners of the an equilateral triangular plate 11 depends on the length of the tray 6 to be pulled down and the required pulling force (this pulling force depends on the liquid concentration of the photosensitive resin, the viscosity, and the positional relationship of the gear transmission structure). For example, in one design, assuming that the 3D printer can be applied to a commonly used photosensitive resin, the left side angle is about 45°, the right side angle is about 32°, and the lower angle is about 103°. But it should be noted that the above design is just one of the designs. The design of the unequal triangular plate 11 for pulling the bottom plate of the tray 6 is within the scope of the present invention.
  • the resin container 8 must be separated from each other by the modeling platform 9 on the vertical Z-axis, raised, and then attached to print the next layer.
  • each layer If each layer is raised, it must be pushed by the stepping motor 13 by the Z axis with the lead screw. Let the modeling platform 9 rise up step by step.
  • the resin container 8 is pressed against the tray 6 of the resin container 8 by a plurality of press plates 7.
  • the resin container 8 can be easily pulled down to drive the driving gear 15 through the stepping motor 18, and then drive the assembly between the driven gear 16 and the tray 6 without the equilateral triangle 11, the lever 12,
  • the connecting rod 14 and the fixing frame 17 constitute a link mechanism, so that the link mechanism can be pulled down by the lever principle, and the resin container 8 can be angularly separated from the modeling platform 9.
  • the equilateral square plate 11 can pull the entire tray 6 downward and then pull it left and right to generate a swing because it is mounted at the center point of one side of the tray 6, and the equilateral triangle plate 11 is located in the chute of the tray 6 because it is located.
  • the two sides of the triangle formed by the two pin shafts and the hinge points of the unequal triangle plate 11 and the lever 12 are of an unequal ratio structure, so that when the tray 6 is pulled to a certain strength, the triangular unequal proportion structure exerts a left and right unloading force reaction.
  • the tray 6 is swung up and down together, and after the separation operation is completed, the tray 6 and the resin container 8 are automatically returned to the original position by the action of the lever 12, so that the cured layer can be accurately re-printed each time.
  • the surface film 13 of the resin container 8 is absolutely horizontally bonded and printing is continued until completion.
  • the moving pair is provided by one or more holes on one side of the tray, such as elliptical holes 20A, 20B, It is composed of an articulated structure.
  • the non-equal triangle plate 11 pulls down the entire tray 6, the above-mentioned triangular unequal proportion structure moves along the gap left by the elliptical hole positions 20A, 20B. Therefore, the tray 6 is swayed and pulled down from left to right. Since the tray 6 has a certain flexibility, the pull-down width can be automatically adjusted according to the adhesive force of the resin to prevent the pulling force from being excessively pulled and the surface adhesive film 13 from being pulled.
  • the function of the positioning shaft 19 is to strengthen the protection. If the connection between the equilateral triangle plate 11 and the lever 12 is broken, the positioning shaft 19 can be used to support the tray 6 and the resin container 8. To prevent the two from falling. In addition, the connection position of the positioning shaft 19 and the tray 6 has a certain gap, and the tray 6 can be appropriately swayed from side to side.
  • the invention produces a stepping motor 18, a driving gear 15, a driven gear 16, a connecting rod 14, and a fixing frame 17,
  • the lever 12, the unequal triangle plate 11, the pressure plate 7, the fixed shaft 19, the elliptical hole positions 20A, 20B and the tray 6 are assembled, and are mainly driven by a stepping motor to generate a lever pulling force to cause the modeling platform 9 to be pulled.
  • the equilateral triangular plate 11 can swing left and right.
  • the modeling platform 9 is oscillated to be separated from the resin container 8.
  • the invention has completed a number of practical tests and applications, and the printing and separation effects are good, and the printing accuracy can be made up to 0.01 mm per layer. From experience, The opportunity of error is obviously improved by the prior art.
  • the present invention discloses the above structure, and the specific testing process should be well known to those skilled in the art, and according to the specific working principle described above, those skilled in the art should be able to easily It is understood that the above-described printing accuracy and the chance of error are inevitably achieved by the above structure. Therefore, the specific products for the actual test and application process and printing are not described again.
  • the present invention mainly utilizes the principle of lever to pull out the pulling force to cause a natural physical reaction phenomenon, and effectively resolves the tension and the adhesive force generated between the surface adhesive film 13 of the resin container 8 and the modeling platform 9.
  • the invention is based on the use of a motor (such as a stepping motor) to drive the lever 12 through the transmission device, and generates a pulling force to pull the unequal triangle plate 11, which causes the unequal edge triangular plate 11 to naturally swing, when the pulling force is sufficient for the modeling platform 9 and just
  • the cured photosensitive resin is separated from the surface adhesive film 13, and only an appropriate pulling force is generated, but when the pull-up force is insufficient to separate the modeling platform 9 and the newly cured photosensitive resin from the adhesive film 13, the equilateral triangular plates 11 naturally interact with each other.
  • the present invention utilizes physical natural phenomena, and the principle of leverage achieves different tension and adhesion conditions. Automatically generate physical stress changes according to different tension and bonding strength, thereby relieving high tension and adhesion to achieve the desired effect.
  • the structure of the present invention is mainly designed by using natural physical phenomena, the fabrication and installation are simple, the durability is extremely low, the cost is low, the effect is large, the tension and the tension can be dealt with, the maintenance is extremely easy, and the market acceptance is extremely high.
  • this technology can greatly improve the printing production speed, reduce the user's often caused by the film being broken and cause printing failure, greatly reducing the loss of time and money.
  • the separation structure of the 3D printer of the present invention requires almost no maintenance, can be used for a long time, and has low production cost, and is technically integrated with various advantages.
  • the tray 6 may be made of a metal material or other suitable hard materials, which is not limited by the present invention.
  • the unequal triangular plate 11 is only used to illustrate the eccentric structure.
  • the present invention is not limited to the eccentric structure adopting the structure. According to actual working conditions, the eccentric structure can also be designed by other methods.
  • the triangular plate structure can be used without using the triangular structure.
  • the rigid rods of unequal length are connected end to end to make an eccentric structure.
  • the eccentric structure is not limited to a specific geometric member, and the eccentric structure and the moving pair of the tray are not limited to being realized by the guide rod and the chute, but also by providing the slider and the guide rail.
  • one end is hinged to the movable end of the lever pulling device, and the other end forms a moving pair with the center of one side of the tray, and one side in the moving direction of the moving pair forms an unequal with the hinge point.
  • Triangles are all within the scope of the present invention.
  • the connecting rod 14 and the fixing frame 17 are only used to illustrate the lever pulling device.
  • the invention is not limited to the lever pulling device adopting the structure.
  • a servo motor, a DC motor, and an alternating current can be used.
  • the motor, the air motor, and the like provide power, which is not limited by the present invention.
  • the transmission form is also not limited to gear transmission, and transmission modes such as belt drive, chain drive or worm gear can also be used.
  • the driven gear corresponding to the rocker in the connecting rod structure can also be realized by other means, such as changing to a rigid rod or a cam structure, as long as the connecting structure can be driven to complete a complete stroke, the invention is not limited thereto.
  • the structure of the lever including the length, the ratio of the force arms, and the angle between them, are determined according to the mechanism of the actual 3D printer. Since the knowledge involved is common knowledge in the mechanical field, it will not be described again.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)

Abstract

A 3D printer, comprising a modeling platform (9) and a resin container (8); and also comprising: a tray (6) fixedly connected to the resin container (8); a lever traction apparatus; and an eccentric structure with one end hinged to a movable end of the lever traction apparatus, wherein the other end of the eccentric structure and one side of the tray (6) form a moving pair. The printer can realize the stable separation of a modeling platform from an adhesive film on the surface of a resin container, thereby avoiding the adhesive film against the damage caused by the tension, and guaranteeing the precision and the quality of a printed product. Even if the 3D printer is used for a long time, the integral structure of the 3D printer cannot be damaged.

Description

一种3D打印机 a 3D printer
技术领域Technical field
本发明涉及三维打印技术领域,具体涉及一种3D打印机。 The present invention relates to the field of three-dimensional printing technology, and in particular to a 3D printer.
背景技术Background technique
激光立体打印机(Laser 3D Printer),即3D打印机,在工作时,须用光敏树脂作为固化材料,采用的光敏树脂的液体浓度、粘度都比较高。在打印时,盛装光敏树脂的树脂容器及建模出产品的建模平台,两者处于需绝对平衡及绝对互贴平的状态。树脂容器的表面具有一层胶膜,当所述胶膜与建模平台贴平后激光才会对光敏树脂进行照射。因光敏树脂需逐层通过激光照射固化逐层成型,所以必须根据每一层需成型的厚度,将建模平台在Z轴方向向上升高,使要打印的产品有足够的空间去逐层固化成型。而要把原本绝对贴平的树脂容器的表面胶膜及建模平台向上垂直逐层拉高分离,需要很大的力量,由于光敏树脂固化后粘贴力仍相当高,加上光敏树脂本身浓度高,这就使树脂容器及建模平台之间产生很大的张力,由于要打印的产品大都有几百甚至几千层,如经过不断的重复竖直向上大力拉开的操作,有可能把树脂容器表面的胶膜强行拉破,使打印失败,又或者令3D打印机因过度长期硬拉而造成结构损坏。为要解决以上张力问题确保3D打印机可长期使用,令打印的产品更易成功成为本技术领域内迫切需要解决的问题。 Laser stereo printer (Laser 3D Printer), that is, a 3D printer, must use a photosensitive resin as a curing material during operation, and the photosensitive resin used has a relatively high liquid concentration and viscosity. At the time of printing, the resin container containing the photosensitive resin and the modeling platform for modeling the product are in a state of being absolutely balanced and absolutely flat. The surface of the resin container has a film of glue which is irradiated to the photosensitive resin when the film is level with the modeling platform. Since the photosensitive resin needs to be layer-by-layer formed by laser irradiation layer by layer, it is necessary to raise the modeling platform in the Z-axis direction according to the thickness to be formed for each layer, so that the product to be printed has sufficient space to be cured layer by layer. forming. However, it is necessary to pull the surface film and the modeling platform of the resin container which is absolutely flattened up and down vertically, and it requires a lot of force. Since the photosensitive resin is cured, the adhesive force is still quite high, and the photosensitive resin itself has a high concentration. This creates a large tension between the resin container and the modeling platform. Since the products to be printed have hundreds or even thousands of layers, it is possible to resin the resin after repeated repeated vertical upward pulling operations. The film on the surface of the container is forcibly pulled, causing the printing to fail, or causing structural damage to the 3D printer due to excessive long-term hard pulling. In order to solve the above tension problem, it is ensured that the 3D printer can be used for a long time, and the success of the printed product becomes an urgent problem to be solved in the technical field.
目前,本领域技术人员一般直接采用带有丝杆的步进电机,直接拉动建模平台,这种方式虽然可达到想要的分离效果,但由于步进电机在不同受力的情况下,很容易出现“走步” 的情况,大大影响了打印的产品精度,同时也需经常调整及维护,给用户造成了相当的不便,另外由于长久使用上述结构,3D打印机的机械架构也会出现较大的变形,最终会导致连锁反应,使所打印出的产品也达不到要求的精度。除此之外,上述结构也只能适用于打印较小面积的产品,由于没法自行调整拉力,所以只能作一种设定。At present, the person skilled in the art generally directly uses a stepping motor with a screw rod to directly pull the modeling platform. Although this method can achieve the desired separation effect, the stepping motor is very different in the case of different forces. Prone to "walking" The situation has greatly affected the accuracy of the printed products, and it also needs to be adjusted and maintained frequently, which causes considerable inconvenience to the user. In addition, due to the long-term use of the above structure, the mechanical structure of the 3D printer will also undergo large deformation, which will eventually lead to The chain reaction makes the printed products less than the required precision. In addition, the above structure can only be applied to printing products of a small area, and since it is impossible to adjust the pulling force by itself, only one setting can be made.
上述直接拉动建模平台的例子,可参考<<CN 104191625 / DLP光固化3D打印机的工作台组件>>, 当中的实施例一和图一便显示了一种由马达推动的凸轮11直接拉动连杆12造成分离的例子。For an example of the above direct pull modeling platform, refer to <<CN 104191625 / The table assembly of the DLP light-curing 3D printer>>, the first embodiment and the figure 1 show an example in which the motor-driven cam 11 directly pulls the link 12 to cause separation.
另外,还有一些其他的本领域技术人员使用左右推动的方式,通过大幅度动作依靠瞬间推力将建模平台撞出,也同样能达到想要的分离效果,但由于动作幅度大而容易引致3D打印机的整体机械架构变形及连接件的松脱,大大增加维修成本,而盛装在树脂容器内的光敏树脂也容易溢出,增加树脂容器的破损机率以及浪费光敏树脂原料。In addition, there are some other technicians in the field who use the left and right push method to break the modeling platform by a momentary action by a large-scale action, and also achieve the desired separation effect, but it is easy to cause 3D due to the large motion range. The deformation of the overall mechanical structure of the printer and the looseness of the connecting member greatly increase the maintenance cost, and the photosensitive resin contained in the resin container is also likely to overflow, increasing the probability of damage of the resin container and wasting the photosensitive resin raw material.
如上所述,虽然业内技术人员已尝试各种方式解决前述的问题,但都不能够达到理想的效果。As described above, although the skilled person has tried various ways to solve the aforementioned problems, it has not been able to achieve the desired effect.
发明内容Summary of the invention
针对上述技术问题,及现阶段本领域技术人员所采取的技术手段的不足,本发明的目的在于提供一种3D打印机,能够实现建模平台与树脂容器表面的胶膜的平稳分离,避免胶膜因受拉而容易损坏,保证打印的产品精度和质量。且长期使用也不会损坏3D打印机的整体结构。In view of the above technical problems, and the deficiencies of the technical means adopted by those skilled in the art at this stage, the object of the present invention is to provide a 3D printer capable of achieving smooth separation of the film on the surface of the modeling platform and the resin container, and avoiding the film. It is easily damaged due to pulling, ensuring the accuracy and quality of printed products. And long-term use will not damage the overall structure of the 3D printer.
为实现上述目的,本发明采取的技术方案是:In order to achieve the above object, the technical solution adopted by the present invention is:
一种3D打印机,包括一建模平台及一树脂容器;A 3D printer comprising a modeling platform and a resin container;
还包括:固定连接所述树脂容器的一托盘;一杠杆牵引装置;一端与杠杆牵引装置的一活动端铰接的一偏心结构;所述偏心结构的另一端与托盘的一侧形成一移动副。The utility model further comprises: a tray fixedly connected to the resin container; a lever pulling device; an eccentric structure whose one end is hinged with a movable end of the lever pulling device; and the other end of the eccentric structure forms a moving pair with one side of the tray.
进一步地,所述杠杆牵引结构包括一动力装置、一传动结构及一执行结构。Further, the lever traction structure includes a power unit, a transmission structure, and an execution structure.
进一步地,所述动力装置为步进电机、伺服电机、直流电机、交流电机、气动马达中的一种。Further, the power device is one of a stepping motor, a servo motor, a DC motor, an AC motor, and a pneumatic motor.
进一步地,所述传动结构为一齿轮传动结构,所述齿轮传动结构包括与动力装置的输出端连接的一主动齿轮及与所述主动齿轮啮合的一从动齿轮。Further, the transmission structure is a gear transmission structure, and the gear transmission structure includes a driving gear coupled to the output end of the power unit and a driven gear engaged with the driving gear.
进一步地,所述执行结构包括一连接杆、一固定架、一杠杆;所述从动齿轮的中心铰接于固定架;所述连接杆的一端铰接于偏近从动齿轮中心处以获得较大的扭力;所述杠杆的一端与连接杆的另一端铰接,所述杠杆的支点铰接于固定架,所述杠杆的另一端作为杠杆牵引装置的活动端。Further, the execution structure includes a connecting rod, a fixing frame and a lever; a center of the driven gear is hinged to the fixing frame; one end of the connecting rod is hinged at a center of the proximal driven gear to obtain a larger Torque; one end of the lever is hinged to the other end of the connecting rod, the fulcrum of the lever is hinged to the fixed frame, and the other end of the lever serves as the movable end of the lever pulling device.
进一步地,所述偏心结构为一不等边三角板,所述不等边三角板的一端具有一铰支点,与杠杆牵引装置的活动端铰接,另一端具有至少两个导杆或滑块,可移动地安装于固定机架的一侧的滑槽或导轨内。Further, the eccentric structure is an unequal triangle, and one end of the unequal triangle has a hinge point hinged to the movable end of the lever pulling device, and the other end has at least two guide rods or sliders, and is movable The ground is mounted in a chute or rail on one side of the fixed rack.
进一步地,所述不等边三角板的三个角的位置关系是根据所述托盘的长度、树脂的液体浓度、粘度及齿轮传动结构的位置关系决定的。Further, the positional relationship of the three corners of the unequal square is determined according to the length of the tray, the liquid concentration of the resin, the viscosity, and the positional relationship of the gear transmission structure.
进一步地,还包括用以支撑托盘的多个固定轴。Further, a plurality of fixed shafts for supporting the tray are further included.
进一步地,所述移动副由托盘一侧的一个或以上的孔与偏心结构铰接而组成。Further, the moving pair is composed of one or more holes on one side of the tray hinged with the eccentric structure.
通过采取上述结构,本发明的3D打印机的杠杆牵引装置能够通过杠杆原理将托盘下拉,进而使树脂容器下降,再通过偏心结构使下降后的树脂容器与建模平台之间产生左右摆动,从而使建模平台与树脂容器表面的胶膜分离再上升,从动齿轮、连接杆、固定架的支点及杠杆的一端实际上构成一连杆机构,步进电机驱动主动齿轮再带动从动齿轮转动一周为一个完整的行程,该行程中,杠杆随着从动齿轮牵引不等边三角板,先下拉托盘再在受胶膜与建模平台表面张力和粘力作用下带动托盘左右晃动,建模平台与胶膜分离上升后,完成一整个行程,杠杆回复初始位置,同时带动不等边三角板,再拖动托盘回复水平状态。利用简单的机械结构,即可实现建模平台与胶膜的平稳分离,保证了打印的产品的精度,且不会产生大的冲击,在分离过程中,杠杆牵引装置和偏心结构配合能够起到“卸力”缓冲的作用,避免因反复的大力牵引而对3D打印机的整体结构造成损坏。By adopting the above configuration, the lever pulling device of the 3D printer of the present invention can pull down the tray by the principle of the lever, thereby lowering the resin container, and then causing the left and right swings between the lowered resin container and the modeling platform by the eccentric structure, thereby The separation between the modeling platform and the surface of the resin container is further increased. The driven gear, the connecting rod, the fulcrum of the fixing frame and the end of the lever actually constitute a link mechanism, and the stepping motor drives the driving gear to drive the driven gear to rotate one week. For a complete stroke, in the stroke, the lever pulls the unequal triangle with the driven gear, first pulls down the tray and then drives the tray to shake left and right under the action of the surface tension and adhesion of the film and the modeling platform, the modeling platform and After the film separation rises, the whole stroke is completed, the lever returns to the initial position, and the unequal triangle is driven, and then the tray is dragged to return to the horizontal state. With a simple mechanical structure, the smooth separation of the modeling platform and the film can be achieved, the precision of the printed product can be ensured, and no large impact is generated. In the separation process, the lever pulling device and the eccentric structure can play together. The "unloading force" buffer acts to avoid damage to the overall structure of the 3D printer due to repeated heavy traction.
原理及优点总结如下:The principles and advantages are summarized as follows:
1. 运用齿轮、杠杆牵引装置及偏心结构原理拉动移动副可带动出更大的拉力,力度足以产生扭力轻松地扭动托盘。1. Using the gear, lever traction device and eccentric structure principle to pull the moving pair can drive a larger pulling force, enough to generate torque and easily twist the tray.
2. 当打印细小的工件时齿轮、杠杆牵引装置及偏心结构原理所得出的力度已足够轻松令建模平台与树脂容器产生角度而与树脂容器上之胶膜分离。 但当打印一个大面积件时, 建模平台与树脂容器之间存在很大的张力, 齿轮、杠杆牵引装置及偏心结构原理所得出的力度足以拉破胶膜去分离。 为免产生此情形, 特意构思移动副(偏心结构的一端与杠杆牵引装置铰接而另一端与托盘的一侧形成一移动副),从而把上下拉力往边移动,令托盘在一角被拉弯下, 而因本身带有一定的回弹力, 令托盘会被拉回原本平直状态, 整个过程是带动出有柔韧度的扭动, 令打印很大平面的产品时也可令建模平台与树脂容器产生角度而与树脂容器上之胶膜成功分离。 令电机及整个架构达致最细的劳损,机器寿命长。2. When the small workpiece is printed, the force obtained by the gear, the lever pulling device and the eccentric structure principle is enough to make the modeling platform and the resin container angled and separated from the film on the resin container. But when printing a large area, There is a great tension between the modeling platform and the resin container. The strength of the gear, lever traction device and eccentric structure principle is enough to break the film to separate. In order to avoid this situation, Deliberately conceived the mobile pair (one end of the eccentric structure is hinged to the lever pulling device and the other end forms a moving pair with one side of the tray), thereby moving the pull-up force to the side, causing the tray to be bent at a corner, and a certain resilience, The tray will be pulled back to the original straight state, the whole process is to bring out the flexibility of the twisting, so that when printing a large flat product, the modeling platform can be angled with the resin container and the film on the resin container. Successful separation. The motor and the entire structure achieve the finest strain and long machine life.
3. 有了杠杆拉力的辅助,本电机只需应用小小的齿轮便可产生更大的拉力。 机身尺寸可细小但却可打印比其它品牌更大尺寸工件。3. With the aid of lever tension, the motor can generate more tension with only a small gear. The body size can be small but it can print larger workpieces than other brands.
附图说明DRAWINGS
图1为本发明的3D打印机的一方向的组成示意图,其中,省略了带有丝杠用以调节建模平台9在固定平面上下滑动的Z轴。1 is a schematic view showing the composition of a direction of a 3D printer of the present invention, in which a Z-axis with a lead screw for adjusting the modeling platform 9 to slide up and down in a fixed plane is omitted.
图2为本发明的3D打印机的另一方向的局部透视处理的组成示意图。2 is a schematic view showing the composition of a partial perspective process in another direction of the 3D printer of the present invention.
图3为本发明的3D打印机的另一方向的局部透视处理的组成示意图,可以淸楚看见步进电机18的位置。3 is a schematic view showing the composition of the partial perspective processing in the other direction of the 3D printer of the present invention, and the position of the stepping motor 18 can be seen.
图4(a) 为本发明的3D打印机的又一方向的剖面示意图,其中,建模平台和树脂容器处于平行状态。4(a) is a cross-sectional view showing still another direction of the 3D printer of the present invention, in which the modeling platform and the resin container are in a parallel state.
图4(b) 为本发明3D打印机的的又一方向的剖面示意图,其中,建模平台和树脂容器之间具有一定角度的倾斜。Figure 4(b) A cross-sectional view of still another direction of the 3D printer of the present invention, wherein the modeling platform and the resin container have an angled inclination.
附图标记说明:6-托盘;7-压板;8-树脂容器;9-建模平台;11-不等边三角板;12-杠杆;13-表面胶膜;14-连接杆;15-主动齿轮;16-从动齿轮;17-固定架;18-步进电机;19-固定轴; 20A, 20B-椭圆孔位。DESCRIPTION OF REFERENCE NUMERALS: 6-tray; 7-platen; 8-resin container; 9-modeling platform; 11-unequal triangle; 12-lever; 13-surface film; 14-linker; ; 16-driven gear; 17-fixing frame; 18-stepping motor; 19-fixed shaft; 20A, 20B - elliptical hole position.
具体实施方式detailed description
为使本发明的上述特征和优点能更明显易懂,下文特举实施例,并配合所附图作详细说明如下。The above described features and advantages of the invention will be apparent from the following description.
本发明的3D打印机采用中轴偏离与杠杆摇摆卸力分离相结合的技术,其具体的工作原理及结构介绍如下:The 3D printer of the invention adopts a technology combining the central axis deviation and the lever swing unloading separation, and the specific working principle and structure thereof are as follows:
如图1至图3及图4(a)、图4(b)所示,SLA(Stereo lithography Appearance) 立体光固化成型法及DLP(Digital Light Processing) 数字光处理器3D打印机的工作原理是运用激光进行分层照射液态光敏树脂,使树脂容器8中的光敏树脂逐层固化在垂直Z轴上的建模平台9表面。每次要进行下一层打印时,建模平台9就需要带动前一层已刚刚固化的光敏树脂与树脂容器8的表面胶膜13分离,再升高到已设定的下一层高度让激光再向建模平台9照射于液态光敏树脂以固化另一层,如此类推,经多层固化,产品方可成型,有的产品可能经过高达过万层的固化。SLA (Stereo lithography) as shown in Figures 1 to 3 and 4(a) and 4(b) Appearance) Stereolithography and DLP (Digital Light Processing) The working principle of the digital light processor 3D printer is to use a laser to layer the liquid photosensitive resin, so that the photosensitive resin in the resin container 8 is layer-by-layer cured on the surface of the modeling platform 9 on the vertical Z-axis. Each time the next layer of printing is to be performed, the modeling platform 9 needs to drive the photosensitive resin which has just been cured in the previous layer to be separated from the surface film 13 of the resin container 8, and then rise to the level of the next layer that has been set. The laser is then irradiated to the modeling substrate 9 to illuminate the liquid photosensitive resin to cure another layer, and so on. After multiple layers of curing, the product can be molded, and some products may be cured by up to 10,000 layers.
当每层打印时建模平台9与树脂容器8的表面胶膜13垂直分离时会因光敏树脂的粘力及两平面贴平而产生巨大张力。When the molding platform 9 is vertically separated from the surface film 13 of the resin container 8 at the time of printing, the tensile force of the photosensitive resin and the flatness of the two planes generate a large tension.
但上文已提及过,建模平台9与树脂容器8两者必为绝对水平贴合才可精确地打印,却又必须经过多次的逐层分离再打印的步骤,要成功离合而不破损树脂容器8的表面胶膜13, 并可完成打印是本发明的核心目的。However, as mentioned above, both the modeling platform 9 and the resin container 8 are capable of accurately printing in an absolute horizontal fit, but must be subjected to multiple steps of layer-by-layer separation and printing, to be successfully clutched without Breaking the surface film 13 of the resin container 8, Printing can be completed and is the core purpose of the present invention.
以下结合附图对本发明的3D打印机的结构及工作过程做详细地介绍:The structure and working process of the 3D printer of the present invention will be described in detail below with reference to the accompanying drawings:
本发明的3D打印机的结构:包括建模平台9及树脂容器8;还包括:固定连接树脂容器8的托盘6;杠杆牵引装置;一端与杠杆牵引装置的一活动端铰接的一偏心结构;所述偏心结构的另一端与托盘6的一侧形成一移动副(表示任何两个构件一直保持相互接触,且可在一个方向上互相移动)。所述杠杆牵引结构包括作为动力装置的步进电机18、一传动结构及一执行结构。所述传动结构为一齿轮传动结构,所述齿轮传动结构包括与步进电机18的输出端连接的主动齿轮15及从动齿轮16。所述执行结构包括连接杆14、固定架17、杠杆12;从动齿轮16的中心铰接于固定架17;连接杆14的一端铰接固定于接近从动齿轮16中心处,具体设计时,保证从动齿轮16及相关齿轮轴不会发生断裂损坏的前提下,将前述铰接点尽可能靠近从动齿轮16的轴心位置。杠杆12的一端与连接杆14的另一端铰接,杠杆12的支点铰接于固定架17,杠杆12的另一端作为杠杆牵引装置的活动端。The structure of the 3D printer of the present invention comprises: a modeling platform 9 and a resin container 8; further comprising: a tray 6 fixedly connected to the resin container 8; a lever pulling device; and an eccentric structure hinged at one end to a movable end of the lever pulling device; The other end of the eccentric structure forms a moving pair with one side of the tray 6 (indicating that any two members remain in contact with each other and can move relative to each other in one direction). The lever traction structure includes a stepping motor 18 as a power unit, a transmission structure, and an execution structure. The transmission structure is a gear transmission structure including a driving gear 15 and a driven gear 16 connected to an output end of the stepping motor 18. The execution structure includes a connecting rod 14, a fixing frame 17, and a lever 12; the center of the driven gear 16 is hinged to the fixing frame 17; one end of the connecting rod 14 is hingedly fixed to the center of the driven gear 16, and is specifically designed to ensure Under the premise that the moving gear 16 and the associated gear shaft do not suffer from breakage damage, the aforementioned hinge point is as close as possible to the axial center position of the driven gear 16. One end of the lever 12 is hinged to the other end of the connecting rod 14, the fulcrum of the lever 12 is hinged to the fixed frame 17, and the other end of the lever 12 serves as the movable end of the lever pulling device.
所述偏心结构为不等边三角板11,其一端具有一铰支点,与杠杆牵引装置的活动端铰接,另一端具有至少两个导杆,可移动地安装于固定机架的一侧的滑槽内。不等边三角板11是用以扭动托盘6的底板的, 因此不等边三角板11上边的长度不可太短,以托盘为2mm厚不锈钢为例,大约为6:1, 即不等边三角板11上边的长度是托盘6的底板的大约1/6。不等边三角板11的三个角的位置关系是取决于要拉下托盘6的长度及需要的拉力(此拉力取决于光敏树脂的液体浓度、粘度及齿轮传动结构的位置关系)。举例而言,其中一种设计下,假设3D打印机可适用于一般常用的光敏树脂, 左面的角大约为45°, 右面的角大约为32°, 下面的角大约为103°。但要注意的是上述的设计只是其中一种设计,
Figure 4efc
何以不等边三角板11用以拉动托盘6的底板的设计均在本发明的保护范围之内。
The eccentric structure is an equilateral triangular plate 11 having a hinge point at one end and hinged with the movable end of the lever pulling device, and the other end has at least two guiding rods, and is movably mounted on the sliding groove on one side of the fixed frame. Inside. The unequal triangle plate 11 is for twisting the bottom plate of the tray 6, so the length of the upper side of the unequal triangle plate 11 is not too short, and the tray is made of 2 mm thick stainless steel, which is about 6:1, that is, the unequal triangle plate 11 The length of the upper side is about 1/6 of the bottom plate of the tray 6. The positional relationship of the three corners of the an equilateral triangular plate 11 depends on the length of the tray 6 to be pulled down and the required pulling force (this pulling force depends on the liquid concentration of the photosensitive resin, the viscosity, and the positional relationship of the gear transmission structure). For example, in one design, assuming that the 3D printer can be applied to a commonly used photosensitive resin, the left side angle is about 45°, the right side angle is about 32°, and the lower angle is about 103°. But it should be noted that the above design is just one of the designs.
Figure 4efc
The design of the unequal triangular plate 11 for pulling the bottom plate of the tray 6 is within the scope of the present invention.
本发明的3D打印机的工作过程:The working process of the 3D printer of the present invention:
1.树脂容器8必须与垂直Z轴上的建模平台9作每层分离、升高、然后再贴合打印下一层的动作。1. The resin container 8 must be separated from each other by the modeling platform 9 on the vertical Z-axis, raised, and then attached to print the next layer.
2.如升高每一层, 必需靠带有丝杠的Z轴通过步进电机13配合推动, 让建模平台9可向上逐层精确地升高。2. If each layer is raised, it must be pushed by the stepping motor 13 by the Z axis with the lead screw. Let the modeling platform 9 rise up step by step.
3.要把建模平台9与树脂容器8分离时所产生的巨大张力卸走,要靠树脂容器8下面的一组零件压板7,托盘6, 不等边三角板11, 杠杆12, 固定架17, 连接杆14, 从动齿轮16, 主动齿轮15,步进电机18及固定轴19共同作用来达成。3. To remove the huge tension generated when the modeling platform 9 is separated from the resin container 8, it is necessary to rely on a set of part pressing plates 7 below the resin container 8, the tray 6, The unequal square plate 11, the lever 12, the fixed frame 17, the connecting rod 14, the driven gear 16, the driving gear 15, the stepping motor 18 and the fixed shaft 19 work together.
4.树脂容器8通过多个压板7压贴在承托树脂容器8的托盘6上。4. The resin container 8 is pressed against the tray 6 of the resin container 8 by a plurality of press plates 7.
5.要轻易把树脂容器8拉下可通过步进电机18驱动主动齿轮15,再带动从动齿轮16及托盘6之间的组件不等边三角板11, 杠杆12, 连接杆14和固定架17组成连杆机构, 令该连杆机构发挥杠杆原理,便能轻易把托盘6往下拉,令树脂容器8与建模平台9形成角度分离。5. The resin container 8 can be easily pulled down to drive the driving gear 15 through the stepping motor 18, and then drive the assembly between the driven gear 16 and the tray 6 without the equilateral triangle 11, the lever 12, The connecting rod 14 and the fixing frame 17 constitute a link mechanism, so that the link mechanism can be pulled down by the lever principle, and the resin container 8 can be angularly separated from the modeling platform 9.
6.由于每个产品都有着不同的轮廓,会导致每层固化时产生的张力及粘力都有所不同, 要让树脂容器8可完全轻松地脱离建模平台9, 则要倚靠不等边的三角板11把整个托盘6向下拉再左右牵引摆动,令已固化在建模平台9上的产品与树脂容器8的表面胶膜13轻柔地分离。6. Since each product has a different profile, the tension and adhesion generated during each layer will be different. To allow the resin container 8 to be completely separated from the modeling platform 9, Then, the entire tray 6 is pulled down by the unequal triangles 11 and then pulled up and down, so that the product which has been solidified on the modeling platform 9 is gently separated from the surface film 13 of the resin container 8.
7.不等边三角板11能把整个托盘6向下拉再左右牵引产生摆动,是因为因它安装在托盘6的一边的中心点,而不等边三角板11由于其位于托盘6的滑槽中的两个销轴与不等边三角板11与杠杆12的铰接点构成的三角形的两边为不等比例结构,令托盘6被拉至某力度时,上述三角不等比例结构会发挥左右卸力反应,从而把托盘6一起左右摆动拉下,完成分离动作后,再在杠杆12的作用下,使让托盘6及树脂容器8自动反回原位,令每次打印完的固化层都能准确地再与树脂容器8的表面胶膜13绝对水平贴合再继续打印至完成为止。7. The equilateral square plate 11 can pull the entire tray 6 downward and then pull it left and right to generate a swing because it is mounted at the center point of one side of the tray 6, and the equilateral triangle plate 11 is located in the chute of the tray 6 because it is located. The two sides of the triangle formed by the two pin shafts and the hinge points of the unequal triangle plate 11 and the lever 12 are of an unequal ratio structure, so that when the tray 6 is pulled to a certain strength, the triangular unequal proportion structure exerts a left and right unloading force reaction. Therefore, the tray 6 is swung up and down together, and after the separation operation is completed, the tray 6 and the resin container 8 are automatically returned to the original position by the action of the lever 12, so that the cured layer can be accurately re-printed each time. The surface film 13 of the resin container 8 is absolutely horizontally bonded and printing is continued until completion.
8. 在另一实施例当中,所述移动副由托盘一侧的一个或以上的孔, 例如椭圆孔位20A、20B, 与偏心结构铰接而组成。当不等边三角板11把整个托盘6向下拉时, 上述三角不等比例结构会沿椭圆孔位20A、20B留下的空隙移动, 从而把托盘6一起左右摆动拉下,由于托盘6有一定柔韧性,能根据树脂粘力自动调节拉下幅度,避免拉下力度过大而拉破表面胶膜13。8. In another embodiment, the moving pair is provided by one or more holes on one side of the tray, such as elliptical holes 20A, 20B, It is composed of an articulated structure. When the non-equal triangle plate 11 pulls down the entire tray 6, the above-mentioned triangular unequal proportion structure moves along the gap left by the elliptical hole positions 20A, 20B. Therefore, the tray 6 is swayed and pulled down from left to right. Since the tray 6 has a certain flexibility, the pull-down width can be automatically adjusted according to the adhesive force of the resin to prevent the pulling force from being excessively pulled and the surface adhesive film 13 from being pulled.
上述工作过程中,定位轴19的作用是加强保障,如不等边三角板11与杠杆12之间的连接断开,定位轴19可以用来承托托盘6和树脂容器8, 以避免二者倒下。另外,定位轴19与托盘6的连接位具有一定的间隙,可以供托盘6有适当的空间左右摆动。During the above work, the function of the positioning shaft 19 is to strengthen the protection. If the connection between the equilateral triangle plate 11 and the lever 12 is broken, the positioning shaft 19 can be used to support the tray 6 and the resin container 8. To prevent the two from falling. In addition, the connection position of the positioning shaft 19 and the tray 6 has a certain gap, and the tray 6 can be appropriately swayed from side to side.
本发明制作出步进电机18, 主动齿轮15, 从动齿轮16, 连接杆14, 固定架17, 杠杆12,不等边三角板11,压板7、固定轴19、椭圆孔位20A、20B和托盘6多个配件,即可组装,主要用步进电机来驱动产生杠杆拉力令建模平台9被拉下, 不等边三角板11可左右摆动, 令建模平台9摆动与树脂容器8分离。本发明已完成多项实际测试及应用,打印及分离的效果良好,能够使打印精确度达每层0.01mm。从经验所得, 出错机会以现有技术有明显进步,当然,本发明公布上述结构的基础上,具体的测试过程对本领域技术人员应是公知的,且根据前文叙述的具体工作原理,本领域技术人员应能轻易理解,通过上述结构必然能够达到上述的打印精度及减少出错机会。故此对于具体的实际测试及应用流程与打印对应的具体产品不再赘述介绍。The invention produces a stepping motor 18, a driving gear 15, a driven gear 16, a connecting rod 14, and a fixing frame 17, The lever 12, the unequal triangle plate 11, the pressure plate 7, the fixed shaft 19, the elliptical hole positions 20A, 20B and the tray 6 are assembled, and are mainly driven by a stepping motor to generate a lever pulling force to cause the modeling platform 9 to be pulled. under, The equilateral triangular plate 11 can swing left and right. The modeling platform 9 is oscillated to be separated from the resin container 8. The invention has completed a number of practical tests and applications, and the printing and separation effects are good, and the printing accuracy can be made up to 0.01 mm per layer. From experience, The opportunity of error is obviously improved by the prior art. Of course, the present invention discloses the above structure, and the specific testing process should be well known to those skilled in the art, and according to the specific working principle described above, those skilled in the art should be able to easily It is understood that the above-described printing accuracy and the chance of error are inevitably achieved by the above structure. Therefore, the specific products for the actual test and application process and printing are not described again.
本发明主要是利用杠杆原理来牵引出拉力,以使其产生自然物理反应现象的一种原理,有效地化解树脂容器8的表面胶膜13与建模平台9间所产生的张力及粘力。本发明是基于使用电机(如步进电机)经过传动装置带动杠杆12, 产生拉力拉动不等边三角板11, 这牵引力令不等边三角板11产生自然摆动,当拉力足以令建模平台9及刚刚固化的光敏树脂与表面胶膜13分离,只会产生上下适当的拉力,但当上下拉力不足以令建模平台9及刚固化的光敏树脂与胶膜13分离时不等边三角板11自然地相互受到下拉拉力而继续向下拉动,运行的同时由于是不等比三角结构,在向下的拉力作用下,自然会将拉力
Figure 7f37
向比例较少的一边,再拉动托盘6,再产生相应的内应力,并使托盘6产生非平均性的弯曲,根据树脂容器8表面胶膜与建模平台9间所产生的张力及粘贴力的程度不同, 会产生相应不同程度的弯曲,最终以达至抵销相关的张力及粘贴力,令树脂容器8表面的胶膜与建模平台9间完全不被破损并有效地分开,与此同时又不构成机械架构性的变形及破坏,对其加工出的产品也能达至最佳的精度,完成打印。
The present invention mainly utilizes the principle of lever to pull out the pulling force to cause a natural physical reaction phenomenon, and effectively resolves the tension and the adhesive force generated between the surface adhesive film 13 of the resin container 8 and the modeling platform 9. The invention is based on the use of a motor (such as a stepping motor) to drive the lever 12 through the transmission device, and generates a pulling force to pull the unequal triangle plate 11, which causes the unequal edge triangular plate 11 to naturally swing, when the pulling force is sufficient for the modeling platform 9 and just The cured photosensitive resin is separated from the surface adhesive film 13, and only an appropriate pulling force is generated, but when the pull-up force is insufficient to separate the modeling platform 9 and the newly cured photosensitive resin from the adhesive film 13, the equilateral triangular plates 11 naturally interact with each other. Pulling down the pulling force and continuing to pull down, while running, because it is not equal to the triangular structure, under the downward pulling force, it will naturally pull
Figure 7f37
Pulling the tray 6 to the side with less proportion, and then generating corresponding internal stress, and causing the tray 6 to produce non-average bending, according to the tension and adhesion force generated between the surface film of the resin container 8 and the modeling platform 9. Different degrees, different degrees of bending will occur, and finally the offset and adhesion force will be offset to make the film on the surface of the resin container 8 and the modeling platform 9 completely unbroken and effectively separated. At the same time, it does not constitute mechanical deformation and damage, and the processed products can achieve the best precision and complete printing.
综上,本发明利用物理自然现象,杠杆原理达致在不同的张力、粘力情况下, 自动根据不同张力及粘贴力度产生物理应力变化,从而化解高张力及粘力以达到预期的效果。In summary, the present invention utilizes physical natural phenomena, and the principle of leverage achieves different tension and adhesion conditions. Automatically generate physical stress changes according to different tension and bonding strength, thereby relieving high tension and adhesion to achieve the desired effect.
由于本发明的结构主要是运用自然物理现象来设计,其制作及安装简单,非常耐用损耗极少,成本低、功效大,可应对不同张力及拉力,维护极易,市场认受性极高。对各业界用户来说,该技术可大大提高打印生产速度,减少用户常因膜被拉破而导致打印失败的情况,大大减少用户在时间、金钱上的损失。绝对可帮助未来巨大的3D打印市场发展。且本发明的3D打印机的分离结构几乎不需维护,可长久使用,制作成本低,其在技术上完全集多种优点于一身。Since the structure of the present invention is mainly designed by using natural physical phenomena, the fabrication and installation are simple, the durability is extremely low, the cost is low, the effect is large, the tension and the tension can be dealt with, the maintenance is extremely easy, and the market acceptance is extremely high. For users in various industries, this technology can greatly improve the printing production speed, reduce the user's often caused by the film being broken and cause printing failure, greatly reducing the loss of time and money. Absolutely help the future of the huge 3D printing market. Moreover, the separation structure of the 3D printer of the present invention requires almost no maintenance, can be used for a long time, and has low production cost, and is technically integrated with various advantages.
需说明的是,托盘6可选用金属材质,也可以选用其他适用的硬质材质,本发明对此不作限定。It should be noted that the tray 6 may be made of a metal material or other suitable hard materials, which is not limited by the present invention.
上文中的不等边三角板11仅用来说明偏心结构,本发明并不仅限于采用此结构的偏心结构,根据实际工况,还可以通过其他方式设计偏心结构,如可不采用三角板结构,直接使用三根不等长的刚性杆首尾依次连接制作偏心结构。总之,偏心的结构并不限定于特定的几何形状构件,偏心结构与托盘的移动副也不仅限于通过导杆和滑槽实现,还可通过设置滑块和导轨的方式实现。总之,只要采用的偏心结构为一端与杠杆牵引装置的活动端铰接,另一端与托盘的一侧中心处形成一移动副,且该移动副的移动方向上的一边与铰接点构成一不等边三角形,则都在本发明的保护范围之内。The unequal triangular plate 11 is only used to illustrate the eccentric structure. The present invention is not limited to the eccentric structure adopting the structure. According to actual working conditions, the eccentric structure can also be designed by other methods. For example, the triangular plate structure can be used without using the triangular structure. The rigid rods of unequal length are connected end to end to make an eccentric structure. In short, the eccentric structure is not limited to a specific geometric member, and the eccentric structure and the moving pair of the tray are not limited to being realized by the guide rod and the chute, but also by providing the slider and the guide rail. In short, as long as the eccentric structure is used, one end is hinged to the movable end of the lever pulling device, and the other end forms a moving pair with the center of one side of the tray, and one side in the moving direction of the moving pair forms an unequal with the hinge point. Triangles are all within the scope of the present invention.
上文中的组件:步进电机18、主动齿轮15、从动齿轮16、杠杆12、 连接杆14和固定架17仅用来说明杠杆牵引装置,本发明并不仅限于采用此结构的杠杆牵引装置,根据实际工况,除步进电机外,还可以采用例如伺服电机,直流电机,交流电机,气动马达等提供动力,本发明对此并不做限定。传动形式也不限于齿轮传动,还可以采用带传动、链传动或蜗轮蜗杆等传动方式。连杆结构中相当于摇杆的从动齿轮也可通过其他方式实现,如改为一刚性杆,或一凸轮结构,只要能够带动连接结构完成一完整的行程,本发明对此不作限定。杠杆的结构,包括力臂的长度、比例及相互之间的夹角,均根据实际3D打印机的机构确定,由于涉及的知识均为机械领域的公知常识,因此不再赘述。The above components: stepper motor 18, drive gear 15, driven gear 16, lever 12, The connecting rod 14 and the fixing frame 17 are only used to illustrate the lever pulling device. The invention is not limited to the lever pulling device adopting the structure. According to the actual working condition, in addition to the stepping motor, for example, a servo motor, a DC motor, and an alternating current can be used. The motor, the air motor, and the like provide power, which is not limited by the present invention. The transmission form is also not limited to gear transmission, and transmission modes such as belt drive, chain drive or worm gear can also be used. The driven gear corresponding to the rocker in the connecting rod structure can also be realized by other means, such as changing to a rigid rod or a cam structure, as long as the connecting structure can be driven to complete a complete stroke, the invention is not limited thereto. The structure of the lever, including the length, the ratio of the force arms, and the angle between them, are determined according to the mechanism of the actual 3D printer. Since the knowledge involved is common knowledge in the mechanical field, it will not be described again.
总之,以上结构和原理仅用以说明本发明的技术方案而非限制,尽管参照上述结构和原理对本发明进行了详细说明,本领域的普通技术人员应当理解,在本发明说明书公布内容的基础上,可以对本发明的技术方案进行修改或者等同替换,而不脱离本发明技术方案和权利要求的精神和范围。这样的修改或者等同替换都在本发明的保护范围之内。In conclusion, the above structures and principles are only used to illustrate the technical solutions of the present invention and are not intended to be limiting, and the present invention will be described in detail with reference to the above-described structures and principles, and those of ordinary skill in the art should understand that The technical solutions of the present invention may be modified or equivalently substituted without departing from the spirit and scope of the present invention and the claims. Such modifications or equivalent substitutions are within the scope of the invention.

Claims (11)

  1. 一种3D打印机,包括一建模平台及一树脂容器;其特征在于,还包括:A 3D printer includes a modeling platform and a resin container; and the method further includes:
    固定连接所述树脂容器的一托盘;一杠杆牵引装置;一端与杠杆牵引装置的一活动端铰接的一偏心结构;所述偏心结构的另一端与托盘的一侧形成一移动副。a tray fixedly connected to the resin container; a lever pulling device; an eccentric structure hinged at one end to a movable end of the lever pulling device; and the other end of the eccentric structure forming a moving pair with one side of the tray.
  2. 如权利要求1所述的3D打印机,其特征在于,所述杠杆牵引结构包括一动力装置、一传动结构及一执行结构。The 3D printer of claim 1 wherein said lever traction structure comprises a power unit, a transmission structure and an actuator structure.
  3. 如权利要求2所述的3D打印机,其特征在于,所述动力装置为步进电机、伺服电机、直流电机、交流电机、气动马达中的一种。The 3D printer according to claim 2, wherein the power unit is one of a stepping motor, a servo motor, a DC motor, an AC motor, and a pneumatic motor.
  4. 如权利要求2所述的3D打印机,其特征在于,所述传动结构为一齿轮传动结构,所述齿轮传动结构包括与动力装置的输出端连接的一主动齿轮及与所述主动齿轮啮合的一从动齿轮。A 3D printer as claimed in claim 2, wherein said transmission structure is a gear transmission structure, said gear transmission structure comprising a drive gear coupled to the output end of the power unit and a meshing engagement with said drive gear Driven gear.
  5. 如权利要求2所述的3D打印机,其特征在于,所述执行结构包括一连接杆、一固定架、一杠杆;所述从动齿轮的中心铰接于固定架;所述连接杆的一端铰接于接近从动齿轮中心处;所述杠杆的一端与连接杆的另一端铰接,所述杠杆的支点铰接于固定架,所述杠杆的另一端作为杠杆牵引装置的活动端。The 3D printer according to claim 2, wherein the execution structure comprises a connecting rod, a fixing frame and a lever; a center of the driven gear is hinged to the fixing frame; and one end of the connecting rod is hinged to Near the center of the driven gear; one end of the lever is hinged to the other end of the connecting rod, the fulcrum of the lever is hinged to the fixed frame, and the other end of the lever acts as the movable end of the lever pulling device.
  6. 如权利要求5所述的3D打印机,其特征在于,所述偏心结构为一不等边三角板,所述不等边三角板的一端具有一铰支点,与杠杆牵引装置的活动端铰接,另一端具有至少两个导杆或滑块,可移动地安装于固定机架的一侧的滑槽或导轨内。A 3D printer according to claim 5, wherein said eccentric structure is an equilateral triangular plate, and one end of said equilateral triangular plate has a hinge point hinged to the movable end of the lever pulling device, and the other end has At least two guides or sliders are movably mounted in the chute or rail on one side of the fixed frame.
  7. 如权利要求6所述的3D打印机,其特征在于,所述不等边三角板的三个角的位置关系是根据所述托盘的长度、树脂的液体浓度、粘度及齿轮传动结构的位置关系决定的。The 3D printer according to claim 6, wherein the positional relationship of the three corners of the unequal square is determined according to the length of the tray, the liquid concentration of the resin, the viscosity, and the positional relationship of the gear transmission structure. .
  8. 如权利要求1所述的3D打印机,其特征在于,所述树脂容器通过若干压板固定于所述托盘。A 3D printer according to claim 1, wherein said resin container is fixed to said tray by a plurality of press plates.
  9. 如权利要求1所述的3D打印机,其特征在于,还包括与所述托盘连接的多个固定轴,用以支撑托盘。A 3D printer according to claim 1, further comprising a plurality of fixed shafts coupled to said tray for supporting the tray.
  10. 如权利要求8所述的3D打印机,其特征在于,所述固定轴与托盘连接处具有空隙。The 3D printer of claim 8 wherein said fixed shaft has a gap at the junction with the tray.
  11. 如权利要求1所述的3D打印机,其特征在于,所述移动副由托盘一侧的一个或以上的孔与偏心结构铰接而组成。The 3D printer of claim 1 wherein said moving pair is formed by articulating one or more apertures on one side of the tray with the eccentric structure.
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CN204172356U (en) * 2014-10-14 2015-02-25 上海联泰三维科技有限公司 For separating mechanism and this shaped device of end projection photocureable rapid shaping
CN204674034U (en) * 2015-03-02 2015-09-30 蔡东濠 A kind of 3D printer

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CN108162383A (en) * 2018-02-07 2018-06-15 中国科学院福建物质结构研究所 A kind of automatic 3D printing device and method
CN108162383B (en) * 2018-02-07 2023-05-12 中国科学院福建物质结构研究所 Automatic 3D printing device and method
CN109228310A (en) * 2018-10-15 2019-01-18 浙江大学台州研究院 A kind of five colors 3D printer
CN109570450A (en) * 2019-01-17 2019-04-05 贵州航天风华精密设备有限公司 A kind of resin sand sand core 3D printing device convenient for batch production
CN109605752A (en) * 2019-01-29 2019-04-12 陕西理工大学 The 3D printing platform and implementation method of single motor driving
CN109605752B (en) * 2019-01-29 2023-10-03 陕西理工大学 Single-motor-driven 3D printing platform and implementation method
CN109910295A (en) * 2019-04-09 2019-06-21 苏州慧通汇创科技有限公司 A kind of light weight and high-intensitive DLP laser fast shaping 3D printer support construction
CN109910295B (en) * 2019-04-09 2024-04-26 苏州慧通汇创科技有限公司 Light-weight and high-strength DLP laser rapid prototyping 3D printer supporting structure
CN115246219A (en) * 2022-09-23 2022-10-28 山东交通学院 Automatic 3D printing apparatus of drawing of patterns
CN115246219B (en) * 2022-09-23 2022-11-25 山东交通学院 Automatic 3D printing apparatus of drawing of patterns

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