CN115008747A - Photocuring three-dimensional printing device and printing method - Google Patents

Abstract

The invention relates to a photocuring three-dimensional printing device which comprises a cylinder sleeve and a light-transmitting piece, wherein a guide mechanism is also arranged on one side of the light-transmitting piece, which is provided with a photosensitive material, and is used for driving a guide part formed during printing and driving a model connected with the guide part to move towards a direction far away from the light-transmitting piece; the light-transmitting piece is characterized in that an auxiliary device is further arranged on one side, provided with the photosensitive material, of the light-transmitting piece, a groove is formed in the surface of the guide part or the model, and the auxiliary device is used for pressing an auxiliary material into the groove, so that the auxiliary material and the guide part or the model are combined into a whole. The invention also relates to a photocuring three-dimensional printing method. The invention can continuously print the model and realize the printing of the infinitely long composite material part.

Description

Photocuring three-dimensional printing device and printing method

This application is a divisional application filed for patent application 202110237620.7. The invention patent application 202110237620.7 entitled photo-curing three-dimensional printing device and printing method, entitled 03/04/2021.

Technical Field

The invention relates to the technical field of photocuring three-dimensional printing, in particular to a photocuring three-dimensional printing device without a forming platform and a printing method.

Background

A stereolithography three-dimensional (3D) printing apparatus prints a structure body model layer by layer on the basis of a digital model file. The three-dimensional model forming device mainly comprises a light source and a forming platform for fixing a model, wherein the forming platform moves through a driving mechanism (such as a screw rod driving mechanism) while the light source irradiates and forms, for example, ultraviolet light (UV) is adopted to selectively irradiate photosensitive resin layer by layer to form a three-dimensional model. For example, in a photo-curing three-dimensional printing apparatus with a built-in light source, as shown in fig. 12, a light beam 39 irradiates a photosensitive resin from bottom to top through a release film 33 to cure the photosensitive resin layer by layer on a forming platform 91 moving upward to form a mold 51, and then the mold 51 is removed from the forming platform 91, and the forming platform 91 needs to be moved down to the vicinity of the release film before the next mold can be printed. This process is unfavorable for the automation of production, gets the model process and the shaping platform moves down the reset process and makes the printing process interrupt, reduces printing efficiency. The process of taking the model off the forming platform is complicated, and the model is easy to damage. If the surface of the forming platform is not cleaned up, for example, the solidified structure remains, the printing precision or the establishment rate of the next model can be influenced, and when the forming platform moves down to reset, the protruding residue or burr on the surface of the forming platform easily damages the release film, thereby reducing the reliability of the printing equipment. In addition, the maximum upward movement stroke of the forming platform is limited by a driving mechanism or a guide rail and the like, so that the range of the printable height of the model is limited.

Disclosure of Invention

The invention aims to provide a photocuring three-dimensional printing device and a printing method, which can continuously print a model and can realize the printing of infinitely long parts.

The technical scheme adopted by the invention for solving the technical problem is as follows: the utility model provides a three-dimensional printing device of photocuring, including cylinder liner and printing opacity piece, the cylinder liner with printing opacity piece sealing connection forms prints the groove, one side of printing opacity piece is provided with and is located print the photosensitive material of inslot, be used for the three-dimensional light beam of printing of photocuring by printing opacity piece is relative the opposite side of photosensitive material sees through the printing opacity piece shines photosensitive material, printing opacity piece is provided with one side of photosensitive material still is provided with guide mechanism, guide mechanism is used for the drive to print the guide part that the time formed, and drive with the model that the guide part links to each other is to keeping away from the direction of printing opacity piece removes.

One side that the printing opacity piece was provided with photosensitive material still is provided with cutting device, cutting device is used for the cutting guide portion to when the cutting with guide portion synchronous movement or synchronous stop move.

The guide portion is a weakened position at a position to be cut.

The photocuring three-dimensional printing device further comprises a primer, one end of the primer is soaked in the photosensitive material and is away from the light-transmitting piece by a preset distance, the primer is matched with the guide mechanism, the guide part is combined with the end face of one end, soaked in the photosensitive material, of the primer, and the guide mechanism is used for driving the primer and driving the guide part combined with the primer to move in the direction away from the light-transmitting piece.

The surface of one side of the light-transmitting piece, which is provided with the photosensitive material, is provided with an isolation layer, and the isolation layer is used for preventing the light beam penetrating through the light-transmitting piece from irradiating the curing part formed by the photosensitive material and the light-transmitting piece from being combined.

The guide part is of a linear structure or an arc structure.

The guide mechanism is one or a combination of a plurality of guide wheels, guide belts and guide gears and is arranged on two sides of the guide part in pairs; when the guide mechanism is a guide belt, the guide belt is supported by at least 2 rollers and rotates, and the guide belt drives the guide part in a surface friction contact mode; when the guide mechanism is a guide gear, the guide part is a rack-shaped structure matched with the guide gear, and the guide gear is meshed with the guide part of the rack-shaped structure.

When the guide mechanism is a guide belt, the guide mechanism also comprises a strengthened light source, and the guide belt is made of a light-transmitting material; the intensified light beam emitted by the intensified light source is irradiated to the guide part through the guide belt.

The guide mechanism can be adjustable in position, number or form.

The guide part is directly connected with the model, or the guide part is connected with the model through a support part, or the guide part is a part of or the whole structure of the model.

The light-transmitting piece is characterized in that an auxiliary device is further arranged on one side, provided with the photosensitive material, of the light-transmitting piece, a groove is formed in the surface of the guide part or the model, and the auxiliary device is used for pressing an auxiliary material into the groove, so that the auxiliary material and the guide part or the model are combined into a whole.

An end cover is further arranged on one side, provided with the photosensitive material, of the light-transmitting piece, the end cover is sealed with the cylinder sleeve, a through hole is formed in the end cover, the through hole is in sliding fit with the guide portion and keeps sealed, and a sealed printing cavity is formed among the cylinder sleeve, the light-transmitting piece, the guide portion and the end cover; the printing cavity is communicated with a material source, and the material source is used for providing photosensitive material with pressure.

When the structure with the upper light source is adopted, the photosensitive material is arranged on the lower side of the light-transmitting piece, the guide mechanism drives the guide part to move downwards to be far away from the light-transmitting piece, and a material box is arranged below the cylinder sleeve; when the structure with the light source arranged below is adopted, the photosensitive material is arranged on the upper side of the light-transmitting piece, the guide mechanism drives the guide part to move upwards and away from the light-transmitting piece, and a material box is arranged above the end cover; when a horizontal light source type structure is adopted, the photosensitive material is arranged on the other side of the light beam injection side of the light transmission piece, the guide mechanism drives the guide part to be far away from the light transmission piece in the horizontal direction, and a material box is arranged below the guide part.

The technical scheme adopted by the invention for solving the technical problem is as follows: by adopting the photocuring three-dimensional printing device, the light beam selectively irradiates the photosensitive material from the other side of the light-transmitting piece relative to the photosensitive material through the light-transmitting piece to form the guide part and the model, the model is connected with the guide part or the guide part is the model, and the guide mechanism drives the guide part and drives the model to move in the direction away from the light-transmitting piece.

Before printing, one end of a primer is immersed into the photosensitive material and is away from the light-transmitting piece by a preset distance, and the primer is matched with the guide mechanism; the light beam penetrates through the light-transmitting piece to selectively irradiate the photosensitive material to form the guide part, the guide part is combined with the end face of one end, immersed in the photosensitive material, of the lead, the guide mechanism drives the lead to be away from the light-transmitting piece firstly, and drives the guide part combined with the lead to move together until the guide part is matched with the guide mechanism.

The utility model discloses a printing device, including a light-transmitting piece, a model, a light-sensitive material, a guide portion, a guide sleeve, a mould sliding sleeve and a mould, wherein the light-transmitting piece is arranged on the model, the guide portion is the model, when the appearance of the model is long tubular structure, the light-transmitting piece is provided with the guide sleeve is arranged on one side of the light-sensitive material, the guide sleeve is sleeved with the model sliding sleeve, and the printing process is more stable.

Advantageous effects

Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages and positive effects: according to the invention, the guide mechanism is added, and the guide part connected with the model is driven by the guide mechanism, so that the printed model can be away from the cylinder sleeve along with the guide part, thus the model is continuously printed, and the printing of infinite long parts is realized.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic diagram of a multiple model printing process in an embodiment of the present invention;

FIG. 3a is a view from direction A of FIG. 2 in one aspect of an embodiment of the present invention;

FIG. 3b is a view from the direction A of FIG. 2 in another aspect of an embodiment of the present invention;

FIG. 4 is a schematic view of a guide mechanism being a guide belt in an embodiment of the present invention;

FIG. 5a is a schematic view of a guide mechanism being a guide gear in an embodiment of the present invention;

FIG. 5b is a schematic view of the guide mechanism being a combination of a guide gear and a guide wheel in an embodiment of the present invention;

FIGS. 6a-6e are schematic diagrams of a printing process according to an embodiment of the present invention;

FIGS. 7a-7b are schematic views of a guide mechanism arrangement according to an embodiment of the present invention;

FIGS. 8a-8f are schematic views of a curved guide portion in an embodiment of the present invention;

FIG. 9 is a schematic view of an apparatus for forming a sealed printing chamber in accordance with an embodiment of the present invention;

FIG. 10 is a schematic view of an apparatus for forming a sealed printing chamber with a built-in light source in accordance with an embodiment of the present invention;

FIG. 11 is a schematic view of a configuration for printing an elongated tubular part using an embodiment of the present invention;

fig. 12 is a schematic structural diagram of a photocuring printing device with an underlying light source in the prior art.

Detailed Description

The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.

The embodiment of the invention relates to a photocuring three-dimensional printing device which comprises a cylinder sleeve and a light-transmitting piece, wherein the cylinder sleeve and the light-transmitting piece are connected in a sealing mode to form a printing groove, one side of the light-transmitting piece is provided with a photosensitive material positioned in the printing groove, the other side, opposite to the photosensitive material, of the light-transmitting piece is provided with a light source, one side, provided with the photosensitive material, of the light-transmitting piece is also provided with a guide mechanism, and the guide mechanism is used for driving a guide part formed in printing and driving a model connected with the guide part to move towards a direction far away from the light-transmitting piece. Wherein the model is the three-dimensional object to be printed.

Fig. 1 to 5 illustrate a photo-curing three-dimensional printing device without a forming platform, which includes a cylinder liner 21 and a light-transmitting member 30, which are combined and sealed to form a printing slot, in which a photosensitive material 5 is filled, so that one side of the light-transmitting member 30 has the photosensitive material 5, and the other side has a light source 37. For example, the light-transmitting member 30 is provided at the bottom of the cylinder liner 21, and the light-transmitting member 30 may be a light-transmitting release film or a light-transmitting release plate. The photocuring three-dimensional printing device further comprises a guide mechanism 10, wherein the guide mechanism 10 is arranged on one side of the light-transmitting member 30, and the guide mechanism 10 is formed by a pair of guide wheels. During printing, the light beam 39 emitted from the light source 37 selectively irradiates the photosensitive material 5 through the light-transmitting member 30, and selectively cures the photosensitive material to form a cured portion, wherein the cured portion includes a guiding portion 59 and a mold 51, the mold 51 is fixedly connected to the guiding portion 59, and may further include a supporting portion 52, for example, the mold 51 may be supported and connected to the guiding portion 59 through the supporting portion 52. The guide 59 cooperates with the guide mechanism 10 and is driven by the guide mechanism 10 to move along arrow 71 and move the former 51 together. For example, the guide mechanism 10 shown in fig. 1 and 2 is composed of a pair of guide wheels and rotates around respective axes along the arrows shown in the drawing, and the guide portions 59 are plate-like structures or columnar structures and are sandwiched between the pair of guide wheels, whereby the pair of rotating guide wheels drive the guide portions 59 to move away from the light-transmitting member 30 by friction or engagement, while the light beam 39 irradiates the photosensitive material 5 through the light-transmitting member 30 to form new solidified portions (i.e., solidified layers) which are combined with the mold 51 and the guide portions 59, and of course, may be combined with the support portions 52.

During the printing process, the guide mechanism 10 does not need to move synchronously with the movement of the model 51 away from the light-transmitting member 30 (upward in the figure), and the three-dimensional printing device only needs to drive the guide part 59 to move upwards through the guide mechanism 10, while the guide wheel 11 of the guide mechanism 10 can keep unmoving, and the guide part 59 can be driven to move only by rotating the guide part, and the guide part 59 is generated by irradiating the photosensitive material 5 with the light beam 39. Therefore, the printing process can be continuous, the model can be continuously printed, and parts with infinite length can be printed. In order to keep the guides 59 stable, it is also possible to use 4 pairs of guide wheels 11 grouped to drive 2 guides 59, respectively, of which 2 pairs drive one guide.

In the printing process of a plurality of patterns 51 illustrated in fig. 2, the patterns may be cut and removed after they have moved upwardly past the guide mechanism 10. The mold 51-1 may be removed, for example, by cutting with a cutter 61 at the double-dot chain line illustrated in the drawing, thereby removing the solidified structure of the upper portion, while the mold 51-2 is still in the printed state. The cutter 61 may be cut in various ways, for example, by a laser beam, and the cutting speed is high and avoids the force acting on the guide 59 and the interference with the printing portion. Of course, the cutter 61 may be a circular cutting saw, and the cutter 61 may be kept moving along the arrow 71 in synchronization with the guide 59 during cutting, or the guide 59 may be temporarily stopped during cutting, and the cutter 61 may be kept stopped in synchronization with the guide 59. The process of taking down the printed model and the printing process of other models can be carried out synchronously, so that the time wasted by taking down the model and recovering to the printing state of the three-dimensional printing device is reduced, and the utilization rate of the three-dimensional printing device can be greatly improved.

Fig. 2 and 3a also show that an isolation layer 49 is formed between the light-transmitting member 30 and the photosensitive material 5, and the isolation layer 49 is used for preventing the light beam penetrating through the light-transmitting member 30 from irradiating the cured part formed by the photosensitive material 5 and combining with the light-transmitting member 30, that is, the isolation layer 49 prevents the cured part of the cured photosensitive material from being adhered to the light-transmitting member 30, so that the cured part can move upwards more freely, and simultaneously, the new photosensitive material can flow back to the gap between the cured part and the light-transmitting member 30, so that the printing can be continuously performed. The isolation layer 49 can be implemented in a variety of ways, such as by providing a light transmissive liquid lubricant layer, or by providing a polymerization inhibitor such that a layer of the photosensitive material proximate to the light transmissive member 30 is not polymerized and cured by the light beam 39, or by providing additional light beams such that a layer of the photosensitive material proximate to the light transmissive member 30 is not polymerized and cured by the light beam 39. The light-transmitting member 30 is illustrated as being made of a semi-permeable membrane material, and a suppressing agent 79, such as oxygen, is disposed below the light-transmitting member 30, and the light-transmitting member 30 transmits light and oxygen, and the oxygen permeates upward through the light-transmitting member 30 and permeates into the photosensitive material 5, so that a layer of the photosensitive material adjacent to the light-transmitting member 30 is not polymerized and solidified when irradiated by the light beam 39, thereby forming a polymerization dead zone isolation layer 49. This allows the guide mechanism 10 to move continuously or at a constant rate to drive the guide 59 upward while the light beam 39 continues to irradiate the photosensitive material forming guide 59 and the curing mold 51 through the light-transmitting member 30, thereby achieving continuous printing.

The mold 51 may be connected to the guide 59 through the support 52, or the mold 51 may be directly coupled to the guide 59. The mold 51 is connected with the guide part 59 through a plurality of thin supporting parts 52, the mold 51 can be conveniently separated from the guide part 59 after printing is finished, and the printing process of a plurality of molds which are difficult to directly print or need additional supporting can be realized, such as the supporting parts 52 shown in fig. 7 b. In addition, fig. 3a-3b illustrate the schematic view of the direction a of fig. 2 in two cases, and fig. 3a illustrates that the mold 51 can be symmetrically arranged on both sides of the guiding portion 59, so as to facilitate the force balance of the guiding portion 59 and maintain the stability and the printing precision. It is of course also possible to have the guide 59 near the edge of the cylinder liner 21 as shown in fig. 3b, with the mould 51 being located on the side of the guide 59, which may facilitate printing larger moulds. Fig. 3a illustrates that a weakened position 55 may be formed at a position to be cut of the guide 59, for example, a hole or a grid or other structure for appropriately weakening the local strength may be provided at the position to be cut of the guide 59, so that the cutting may be facilitated without affecting the upward stable movement of the mold 51 carried by the guide 59.

Fig. 4 illustrates that the guide mechanism 10 may be a pair of guide belts 12. The guide belt 12 is supported by at least 2 rollers and rotated, and the guide portion 59 is moved upward by the guide belt 12. The guide belt 12 and the guide portion 59 can have a larger contact area, and the guide portion 59 can be driven to move more stably. The guiding belt 12 may also be transparent, and may be provided with an enhanced light source 78, a light beam emitted by the enhanced light source 78 irradiates the guiding portion 59 through the guiding belt 12, so that the photosensitive material liquid layer on the surface of the guiding portion 59 is cured and combined with the guiding belt 12, further enhancing the combining effect of the guiding portion 59 and the guiding belt, the guiding mechanism 10 may drive the guiding portion 59 more stably, and meanwhile, the guiding belt 12 may be torn off from the guiding portion 59 "at the upper part thereof.

Fig. 5 illustrates that the guide 59 may be a rack-like structure. The respective guide means 10 may be constituted by pairs of guide gears 13, as shown in fig. 5 a. Of course, the guiding mechanism 10 may be a guiding wheel corresponding to a guiding gear 13 as shown in fig. 5 b. The guide gear 13 is driven in a manner of being meshed with the rack-shaped guide portion 59, so that possible friction sliding of the guide gear can be avoided, and the guide gear is favorable for improving the displacement precision of driving and the precision and stability of printing.

Fig. 6a-6e illustrate the starting process of printing, the three-dimensional printing device in fig. 6a includes a printing tank formed by a cylinder 21 and a light-transmitting member 30, a photosensitive material 5 is filled in the printing tank, a guiding mechanism 10 is arranged above the printing tank, a pair of guiding wheels is shown to form a guiding part, in fig. 6b, a primer 19 is firstly assembled to match the guiding mechanism 10, one end of the primer 19 is immersed in the photosensitive material 5 and keeps a set gap, such as a gap with an initial layer thickness, with the light-transmitting member 30, then a starting light beam 39 irradiates the photosensitive material 5 through the end surface of the light-transmitting member 30 opposite to the end of the primer 19, a solidified part is formed to be combined with the end surface of one end of the primer 19, the driving mechanism 10 starts to drive the primer 19 to move upwards along an arrow 71, the solidified part is continuously increased along with the irradiation of the light beam 39 and the guiding mechanism 10 driving the primer 19 to move upwards, as shown in fig. 6c, while also irradiating according to the layer information of the mold 51, the mold 51 is produced, and the mold 51 is directly or indirectly coupled to the guide 59 to move upward together with the guide 59. When the guide 59 has formed a sufficient height, that is, the guide 59 is directly engaged with the guide mechanism 10, the primers 19 may be removed, as shown in fig. 6d, and then the light beam 39 dynamically adjusts the irradiation pattern according to the layer information, while the guide 59 continues to move the mold 51 upward until the mold completely passes above the guide mechanism 10, such as the mold 51-1 in fig. 6e, the cutter 61 may start cutting the guide 59, remove the printed mold 51-1, and simultaneously continue printing the mold 51-2, and the subsequent printing process may continue until all the printing operations for the mold to be printed are completed.

Fig. 7a-7b illustrate a top view of the printing apparatus and only show the photosensitive material 5, the former 51, the guide 59 and the guide mechanism 10, and fig. 7a shows that only one guide 50 may be used, and the former 51 (e.g., a leaf-shaped former) is directly coupled to the guide and moves with the guide mechanism. In addition, in order to improve the stability, as shown in fig. 7b, 2 guide portions may be respectively disposed at opposite corners of the cylinder liner, so that the mold 51 may be connected to the 2 guide portions 59, and the guide portions 59 may be driven by a plurality of corresponding guide mechanisms, respectively, so that the printing process may be more stable, and a plurality of support portions 52 may be further used to support the mold 51 to prevent deformation during the printing process. In addition, the figure also shows that the guide wheel of the guide mechanism 10 is a cylindrical structure with a ring groove structure on the periphery, and the guide part 59 is matched with the ring groove structure, so that the contact area between the guide wheel and the guide part 59 can be increased, the friction force is increased, the guide part 59 can be better restrained, the guide part 59 cannot slide along the axis direction of the guide wheel, the printing process is more stable, and the guide part is easier to be driven.

The guide mechanism 10 may adjust the position, number or form of the guide mechanism 10 according to the printing needs of different models. In particular, the form of the guiding mechanism 10 can be adjusted to one or a combination of several forms of guiding wheels, guiding gears, guiding belts or guiding sleeves, for example, the guiding mechanism formed by the combination of one guiding wheel and one guiding gear in fig. 5 b. The number of guide mechanisms 10 can also be adjusted, for example, fig. 3 and 7a can use 1 guide part for one set of guide mechanism, and fig. 7b shows that 2 guide parts for 2 sets of guide mechanism. The position of the guiding mechanism 10 can be adjusted, for example, the guiding mechanism can move or rotate in a direction parallel to the surface of the light-transmitting member 30 during the printing process, and the irradiation position of the corresponding light beam 39 can be adjusted synchronously and correspondingly, so that the printing of a special curing part can be realized, the phenomenon that the light-transmitting member 30 or the light source is partially strained due to long-term printing of the guiding part at a single position can be avoided, and the service life of the equipment is prolonged. The guide mechanism 10 may of course also be movable in a direction perpendicular to the surface of the light-transmitting member 30 to assist in the printing of the stack of cured portions (cured layers) or a particular model, and the spacing between the guide mechanism and the light-transmitting member may be adjusted, for example, according to different guides or models.

In addition, the guiding portion 59 may be a part of or the whole structure of the mold 51 to realize the manufacture of an extremely long part, for example, for a plate-like or tubular part with an internal grid or a certain structure, the outer wall thereof may be directly used as the guiding portion, a part with a long characteristic in a part such as a ladder may be used as the guiding portion, or a part with a shape similar to a chain may have a characteristic of regular change in the length direction thereof as the guiding portion acting like a rack, and a specific guiding gear may be customized accordingly as the guiding mechanism, so that the use amount of photosensitive material by the printing guiding portion 59 may be reduced and the material consumption may be reduced by using the characteristic of the part itself as the guiding portion as much as possible. The printing device has compact structure, does not have a forming platform for fixing the model and a driving mechanism thereof, and can realize the printing of very high or long models or the uninterrupted batch printing process of a plurality of models or a plurality of models.

Fig. 8a-8f illustrate embodiments where the guide is curved in an arc. Fig. 8a shows a printing device with a guide mechanism 10, which shows that the guide mechanism 10 is formed by 2 pairs of guide wheels 11. In fig. 8b, it is shown that an arc-shaped lead 19 is assembled in the printing apparatus and matched with 2 pairs of guide wheels, one end of the lead 19 is immersed in the photosensitive material 5 and matched with the light-transmitting member 30 with a preset gap, the lead 19 can be driven by 2 pairs of guide wheels to rotate along the arc direction shown by arrow 71, meanwhile, the light beam 39 irradiates the photosensitive material 5 through the end surface of the light-transmitting member 30 opposite to one end of the lead 19 to form a guide part 59 and is combined onto the end surface of one end of the lead 19, as shown in fig. 8c, along with the movement of the lead 19 along the arc track, i.e. the rotation around the arc center, the guide part 59 is formed by the irradiation of the light beam 39 layer by layer and is combined with the end surface of one end of the lead 19 to move along the arc track along with the lead 19, the cross-sectional shape of the formed guide part 59 can be the same as that of the lead 19, of course, the best matched with the guide mechanism 10 can be different from that of the lead 19, the guide 59 begins to engage the guide mechanism 10 and after the guide 59 has completely passed 2 pairs of guide wheels, the lead 19 can be removed as shown in figure 8 d. It is also possible for the guide 59 to be a mold itself, for example by printing in this way a ring-shaped part or a spiral-shaped spring-like part or the like, and for an auxiliary material, for example a fibrous material or a flowable paste-like material or the like, to be inserted onto this mold or guide 59 during the printing process, the auxiliary material being joined to the guide or mold by auxiliary means. As shown in fig. 8e, the auxiliary device may include a guide wheel 11a having a function of rolling auxiliary material, a groove 56 may be formed on the surface of the guide portion 59, i.e., the mold, and the carbon fiber 77 is pressed into the groove 56 along with the guide wheel 11 a. The auxiliary device can integrate the auxiliary material with the guide part or the mold by means of heating or light irradiation. For example, the auxiliary device may be a reinforcing light source, the photosensitive material in the groove 56 is irradiated and cured by a reinforcing light beam 78 emitted from the reinforcing light source, the carbon fibers 77 are cured on the guide portion 59, that is, the mold 51, or the carbon fibers 77 may have a heat-capacity coating layer, the auxiliary device may be a heating device, and the guide wheel 11a heats the carbon fibers 77 while pressing the carbon fibers 77 into the groove 56, so that the heat-capacity coating layer is melted and then cooled, and then is integrated with the guide portion 59. The solidified mold 51 may be printed simultaneously with the printing of the guide 59 and bonded to the guide 59, moving in an arc along with the guide 59, as shown in fig. 8 f. After the printed pattern 51 passes through the guide mechanism 10, the guide 59 may be cut off by a cutter to remove the pattern 51, similar to that shown in fig. 6 e. The auxiliary device in this embodiment includes a guide wheel 11a having a function of pressing the auxiliary material and a solidifying portion which may be a solidifying light source 78 or a heater (not shown), and it is worth mentioning that the auxiliary device may further include a scraper mechanism for scraping off the pasty material protruding from the guide portion or the mold surface if the auxiliary material is a pasty material such as a mixture of a photosensitive material and a powder material. The linear guides described in fig. 6a to 6e can also be similarly provided with an auxiliary material embedded in the guide or the mold.

Fig. 9, 10 and 11 illustrate that the guide 59 may also form a seal with the cylinder liner 21. For example, in fig. 9, the end cover 22 may be disposed above the cylinder liner 21, and the end cover 22 is fixedly connected to the cylinder liner 21 and maintains a seal, but the end cover 22 may also be a part of the cylinder liner 21. The end cap 22 is provided with a through hole with which the guide 59 is held in sliding engagement and sealed, for example by a sealing ring 25 between the guide 59 and the end cap 22. The cylinder liner 21, the end cover 22, the light-transmitting member 30 and the guide portion 59 form a sealed printing cavity, and a material source 4 can be arranged to be communicated with the printing cavity in the cylinder liner 21 and provide photosensitive material 5 with certain pressure in the printing cavity. The guide part 59 is driven by the guide mechanism 10 in the printing process, the light beam 39 penetrates through the light transmission piece 30, the photosensitive material 5 is irradiated by the light transmission piece 30 to continuously form the guide part 59 to be matched with the end cover 22 to keep sealing, the solidified model 51 is combined on the guide part 59 by irradiation, the light beam moves along with the guide part 59, the guide part 59 and the end cover are kept sealed, the pressure of the photosensitive material 5 in the printing cavity is favorably improved, the pressurized photosensitive material flows back to a gap between the solidified part and the light transmission piece 30 more easily, and the printing speed is favorably improved. The three-dimensional printing device illustrated in fig. 9 adopts a structure of a light source arranged below, the guide mechanism drives the guide portion 59 to move upwards, a material box 49 can be further arranged above the end cover 22, when the cutter 61 cuts the guide portion 59, the photosensitive material inside can flow out and flow to the material box 49, a printing transverse diaphragm structure can be arranged in the guide portion 59 at intervals, and after the cutter 61 cuts the guide portion 59, the pressure of the photosensitive material in the printing cavity can still be maintained. The pressure of the photosensitive material may be controlled so that the height of the photosensitive material 5 stored in the guide 59 is as low as possible below the position of the cutter 61 so as not to be overflowed by the photosensitive material when the cutter 61 cuts. Fig. 10 also shows that the three-dimensional printing device adopts an overhead light source type structure, the guide mechanism 10 drives the guide portion 59 to move downwards, and a bin 49 is arranged below the three-dimensional printing device, when the guide portion 59 is cut by a cutter 61, the flowing photosensitive material can directly flow into the bin 49. The source 4 may also be connected to the bin 49 by a conduit so that the light-sensitive material can be recycled.

The present embodiment can also be used for manufacturing long tubular components, and the outer contour of such components can be used as a guide part to cooperate with a guide mechanism, for example, the three-dimensional printing device illustrated in fig. 11 is of a horizontal structure, i.e., a horizontal light source type structure, the light beam 39 horizontally penetrates through the light-transmitting member 30 to selectively irradiate the photosensitive material 5 in the printing cavity to form a guide part 59 and a model 51, the guide part 59 illustrated in fig. 11 is also the model 51, i.e., the model 51 is of a long tubular structure, the internal structure of the model can be flexibly adjusted, and a bin 49 can be arranged below the position of the guide part corresponding to the cutter 61 for receiving the photosensitive material flowing out when the guide part is cut. In addition, fig. 11 also illustrates that a plurality of through holes can be formed in the end cover 22, and a plurality of guide portions or a plurality of models can be printed in parallel at the same time, the guide mechanism illustrated in fig. 11 can further include a guide sleeve 14, the guide portions 59 are restrained and positioned by the guide sleeve 14, the guide sleeve 14 and the guide portions 59 can be blocked from moving due to friction and other actions, the guide portions 59 can be pushed to move along an arrow 71 by controlling the volume of the photosensitive material 5 fed into the cylinder liner 21 through the material source 4, and certainly, in order to more accurately control the guide portions to move away from the light-transmitting member 30, a guide wheel 11 can be further arranged and drives the guide portions 59 to move at a preset speed. The object model manufactured by the traditional extrusion molding process is printed in a mode of pressurizing the photosensitive material, a long tubular part can be continuously manufactured by only customizing a cover plate 22 similar to an extrusion die in the method, and the internal structure of the part can be freely designed without the limitation of the cover plate 22.

The photosensitive material 5 in this embodiment may be a photosensitive resin, or any resin liquid or slurry that can initiate polymerization, or may be a mixture of a powder material or other liquid material, such as ceramic powder, metal powder, plastic powder or other powder material, mixed in a photosensitive resin liquid, or may be a mixture of cells, drugs, pigments, and the like, mixed in a resin.

The light source 37 or the light beam 39 in the present embodiment may be ultraviolet light with wavelength of 355nm or 405nm according to the specific characteristics of the photosensitive material, or visible light curing may be performed by using different light sources such as visible light with wavelength of 405nm to 600 nm. The light imaging device can be realized by adopting SLA (stereo Lithography apparatus), DLP (digital light processing) light source, Laser scanning (Laser), LED screen, LCD screen and other modes, and can also utilize screens such as mobile phone screen, IPAD screen, other display screens and the like as imaging light sources, and certainly, the light imaging device can also be matched with corresponding lens groups to adjust light.

In the present embodiment, the directional terms such as "above", "below", "left", "right", and the like are used for convenience of description based on the specific drawings, and are not intended to limit the present invention. In practical applications, the actual upper or lower position may differ from the figure due to the spatial variation of the structure as a whole. Such variations are intended to be within the scope of the invention.

Claims (11)

1. A photocuring three-dimensional printing device comprises a cylinder sleeve and a light-transmitting piece, wherein the cylinder sleeve and the light-transmitting piece are connected in a sealing mode to form a printing groove, a photosensitive material positioned in the printing groove is arranged on one side of the light-transmitting piece, and light beams for photocuring three-dimensional printing penetrate through the light-transmitting piece from the other side, opposite to the photosensitive material, of the light-transmitting piece to irradiate the photosensitive material; the light-sensitive material mould is characterized in that an auxiliary device is further arranged on one side, provided with the light-sensitive material, of the light-transmitting piece, a groove is formed in the surface of the guide portion or the mould, and the auxiliary device is used for pressing an auxiliary material into the groove, so that the auxiliary material and the guide portion or the mould are combined into a whole.

2. The photo-curable three-dimensional printing device according to claim 1, wherein the auxiliary material is a fibrous material or a paste-like material.

3. The photo-curing three-dimensional printing device according to claim 1, wherein the auxiliary device comprises a guide wheel having a function of rolling the auxiliary material.

4. The photocuring three-dimensional printing device of claim 1, wherein the auxiliary device integrates the auxiliary material with the guide or the mold by means of heat or light.

5. The photocuring three-dimensional printing apparatus according to claim 1, wherein the auxiliary device comprises a guide wheel having a function of laminating the auxiliary material, the auxiliary material being a fiber having a thermal mass coating layer, and a heating device, the guide wheel having the function of laminating the auxiliary material heating the fiber by the heating device while pressing the fiber into the groove, so that the thermal mass coating layer is melted and then cooled to be integrated with the guide portion or the mold.

6. The photocuring three-dimensional printing apparatus according to claim 1, wherein the auxiliary material is a paste-like material, the auxiliary apparatus further comprising a scraper mechanism that scrapes off the paste-like material protruding from the guide portion or the mold surface.

7. The photocuring three-dimensional printing device according to claim 1, wherein the guide mechanism is a guide belt made of a light-transmitting material; the guide part is provided with a guide belt, and the guide belt is provided with a guide part and a guide part.

8. The photocuring three-dimensional printing apparatus of claim 1, wherein the guide portion and the model are directly connected, or the guide portion and the model are connected through a support portion, or the guide portion is a partial structure or a whole structure of the model.

9. The photocuring three-dimensional printing device according to claim 1, wherein a cutting device is further arranged on the side, where the photosensitive material is arranged, of the light-transmitting member, and is used for cutting the guide part, and moving synchronously with the guide part or stopping moving synchronously with the guide part during cutting.

10. The photo-curable three-dimensional printing apparatus according to claim 1, wherein a surface of the side of the light-transmissive member on which the photosensitive material is disposed is provided with a spacer layer for preventing the light beam transmitted through the light-transmissive member from being irradiated to a cured portion formed by the photosensitive material to be bonded to the light-transmissive member.

11. A photocuring three-dimensional printing method, wherein, with the photocuring three-dimensional printing apparatus as claimed in any one of claims 1 to 10, during printing, the light beam selectively irradiates the photosensitive material from the other side of the light-transmitting member opposite to the photosensitive material through the light-transmitting member to form the guide part and the model, the guide part or the model surface forms a groove, the model is connected with the guide part or the guide part is the model, and the guide mechanism drives the guide part and drives the model to move away from the light-transmitting member; during the movement, the auxiliary device presses the auxiliary material into the groove, so that the auxiliary material is integrated with the guide or the mold.

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