CN209920536U

CN209920536U - 3D printing equipment

Info

Publication number: CN209920536U
Application number: CN201920319486.3U
Authority: CN
Inventors: 冯玉林; 邓伟平
Original assignee: Shenzhen Ruifeng Technology Co Ltd
Current assignee: Shenzhen Ruifeng Technology Co Ltd
Priority date: 2019-03-11
Filing date: 2019-03-11
Publication date: 2020-01-10
Anticipated expiration: 2029-03-11

Abstract

The utility model discloses a 3D printing apparatus, include: the projection assembly comprises a light source, a light homogenizing device, a polarizing element, a display and a projection objective which are sequentially connected from top to bottom; the fixed plate is provided with a plurality of projection assemblies, and the projection surfaces of the projection assemblies are all positioned on the same horizontal plane and spliced to form a spliced projection surface; the liquid tank is arranged below the plurality of projection assemblies and comprises a first liquid tank and a second liquid tank; the fixing plate is arranged on the printing platform and used for driving the plurality of projection assemblies to move back and forth above the first liquid tank and the second liquid tank under the driving of the printing platform and respectively perform 3D printing on the first liquid tank and the second liquid tank. The utility model discloses simple structure, and can improve the efficiency that 3D printed.

Description

3D printing equipment

Technical Field

The utility model relates to a 3D prints technical field, more specifically says, relates to a 3D printing apparatus.

Background

The 3D printing technology is a novel manufacturing technology which takes a three-dimensional design model of a computer as a blueprint, and utilizes modes such as laser beams, hot melting nozzles and the like to stack and bond special materials such as metal powder, ceramic powder, plastics, cell tissues and the like layer by layer through a software layering dispersion and numerical control forming system, and finally, the materials are stacked and formed to manufacture solid products. Different from the traditional manufacturing industry in which the raw materials are shaped and cut through machining modes such as a die and a turn-milling mode to finally produce finished products, the 3D printing method changes a three-dimensional entity into a plurality of two-dimensional planes, and the three-dimensional entity is produced by processing the materials and superposing the materials layer by layer, so that the manufacturing complexity is greatly reduced. Therefore, the digital manufacturing mode has the natural advantages of simple process, low customization cost, short production period and the like, and can be extended to a wider production crowd.

With the continuous increase of personalized demands of people and the further expansion of customized processing and manufacturing economy, the market provides more challenges for the printing precision and the printing efficiency of the 3D printing technology, 3D printing manufacturers generally need to meet the customized demands of a large number of users in an extremely short production period, and the 3D printing equipment in the prior art is low in efficiency and difficult to meet the high efficiency requirement.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model provides a 3D printing apparatus aims at solving the lower technical problem of 3D printing apparatus efficiency among the prior art.

The utility model provides a pair of 3D printing apparatus, include:

the projection assembly comprises a light source, a light homogenizing device, a polarizing element, a display and a projection objective which are sequentially connected from top to bottom;

the fixed plate is provided with a plurality of projection assemblies, and the projection surfaces of the projection assemblies are all positioned on the same horizontal plane and spliced to form a spliced projection surface;

the liquid tank is arranged below the plurality of projection assemblies and comprises a first liquid tank and a second liquid tank;

the fixing plate is arranged on the printing platform and used for driving the plurality of projection assemblies to move back and forth above the first liquid tank and the second liquid tank under the driving of the printing platform and respectively perform 3D printing on the first liquid tank and the second liquid tank.

Optionally, a partition plate is arranged in the liquid tank, and the partition plate is vertically arranged in the liquid tank and used for dividing the liquid tank into the first liquid tank and the second liquid tank.

Optionally, a gap is formed between the partition plate and the bottom of the liquid tank, and the first liquid tank and the second liquid tank are communicated through the gap.

Optionally, a first scraper is arranged on the first liquid tank, a second scraper is arranged on the second liquid tank, and the first scraper and the second scraper alternately work to scrape off the liquid level of the first liquid tank and the liquid level of the second liquid tank.

Optionally, the light source is a laser light source, and the polarizing element includes a first polarizing plate.

Optionally, the light source is an LED light source, the polarizing element includes a second polarizing plate and a third polarizing plate, the second polarizing plate is disposed between the light uniformizing device and the display, and the third polarizing plate is disposed between the display and the projection objective.

Optionally, a heat sink is disposed on the top of the LED light source.

Optionally, the display is an LCD liquid crystal display.

According to the technical scheme provided by the utility model, the utility model discloses following beneficial effect has:

the utility model discloses in through the fixed plate simultaneously set up a plurality of projection subassemblies on the cistern, a plurality of projection subassemblies splice and carry out 3D to the cistern and print, increased the projection area, improved the efficiency that 3D printed; simultaneously, be provided with first cistern and second cistern, the projection subassembly can realize 3D printing at the top round trip movement in two cistocks under the drive of fixed plate, when the projection subassembly carries out 3D printing to one of them cistern, another cistern can be carried out the liquid level by the scraper and strickles the operation and the levelling of stewing for the projection subassembly can be in operating condition always, and need not wait for the liquid level to strickle and the levelling of stewing when every projection finishes one deck plane, projection subassembly's printing efficiency has been improved.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is a schematic structural diagram of a 3D printing apparatus according to a first example provided in an embodiment of the present invention;

fig. 2 is a front view of a 3D printing apparatus according to a first example provided by the present invention;

fig. 3 is a schematic structural diagram of a projection module fixed on a fixing plate according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a 3D printing apparatus according to a second example provided in the embodiment of the present invention;

fig. 5 is a front view of a 3D printing apparatus according to example two provided by the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. It should be noted that the terms of orientation such as left, right, up and down in the embodiments of the present invention are only relative to each other or are referred to the normal use state of the product, and should not be considered as limiting.

The photocuring 3D printing technology utilizes the principle that ultraviolet light beams irradiate liquid photosensitive resin to generate photopolymerization reaction and then cure, so that the material is formed in an accumulated manner point by point or layer by layer, and the photocuring 3D printing technology has the advantages of high efficiency and low cost, and becomes a mainstream branch of the 3D printing technology. The Stereolithography 3D printing technology is mainly classified into a stereo Stereolithography (SLA), a Digital Light Processing (DLP), or a Liquid Crystal Display (LCD) projection technology. The SLA technology is characterized in that laser beams are rapidly scanned point by point and irradiated on photosensitive resin to be cured and molded; DLP and LCD projection technology projects the whole layer of image onto photosensitive resin through a projection lens and forms the image layer by superposition.

As shown in fig. 1, fig. 1 is a schematic structural diagram of a 3D printing apparatus according to a first example provided by an embodiment of the present invention; fig. 2 is a front view of a 3D printing apparatus according to an example one provided by the present invention.

The utility model provides a pair of 3D printing apparatus, include: the projection assembly, the fixing plate 6 and the liquid tank 6; the projection assembly comprises a light source, a light homogenizing device 2, a polarizing element, a display 4 and a projection objective 5 which are sequentially connected from top to bottom, wherein all parts in the projection assembly are fixedly connected through a connecting element, and the connecting element comprises but is not limited to a screw, a nut, a clamping plate, a supporting plate and the like. The working principle of the projection assembly is as follows: firstly, a light source emits stable ultraviolet light and irradiates on a light uniformizing device 2, after the light uniformizing device 2 realizes optical fiber homogenization (namely light uniformization), the light passes through a polarizing element and becomes polarized light, the polarized light irradiates on an LCD, and the LCD is amplified by a projection objective 5 and then imaged on the top surface of a liquid tank 6; the image displayed on the LCD is imaged by the projection lens 5 onto the top surface of the liquid bath 6, and then the liquid resin is cured layer by layer for 3D printing. The light emitted by the light source is homogenized through the light homogenizing device 2, the light homogenizing device 2 can be composed of a focusing lens, a collimating lens and a diaphragm, wherein the focusing lens is a single-chip aspheric lens with a high numerical aperture, so that the utilization rate of light energy can be improved as much as possible, and the complexity and the cost of an optical structure are reduced. The display 4 may then be an LCD liquid crystal display 4.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a projection module fixed on a fixing plate according to an embodiment of the present invention. Simultaneously, the concatenation is installed a plurality ofly on the fixed plate 6 the projection subassembly, it is a plurality of the projection subassembly all can be installed on fixed plate 6 for detachably, and a plurality of projection subassemblies are projection objective 5 and install on fixed plate 6 down and vertically to ensure a plurality ofly the plane of projection subassembly all is located same horizontal plane and splices and constitutes the concatenation plane of projection. The number of the projection assemblies mounted on the fixing plate 6 may be determined according to actual conditions, and is not limited specifically herein. It can be understood that when a plurality of projection assemblies are spliced into a whole, the plurality of projection assemblies need to be projected to the liquid tank 6 below at the same time when performing 3D printing, and since the liquid level of the resin on the liquid tank 6 is horizontal, in order to ensure that the plurality of projection assemblies can perform 3D printing on the whole liquid level at the same time, the projection surfaces of the projection assemblies need to be ensured to be located on the same horizontal plane. In addition, in order to utilize the liquid level space as much as possible, the projection surfaces of a plurality of projection assemblies can be seamlessly spliced to form a whole spliced projection surface, so that the 3D printing space is utilized to the maximum extent. Specifically, the plurality of projection components may be mounted on the fixing plate 6 in a manner that mounting holes for the projection objective 5 to pass through are formed in the fixing plate 6, then the projection components assembled by the components vertically pass through the mounting holes, so that part of the structure of the projection objective 5 passes through the mounting holes, and finally the projection objective 5 is fixed on the mounting holes, thereby realizing the fixed mounting of the projection components. In an exemplary installation, the projection lens 5 may be fixed with a clamping plate in advance, and then the clamping plate is fixed on the fixing plate 6 by a fastener such as a screw, so as to install the projection module on the fixing plate 6.

In addition, the liquid tank 6 comprises a first liquid tank 61 and a second liquid tank 62, the first liquid tank 61 and the second liquid tank 62 are both arranged below the plurality of projection components, and the first liquid tank 61 and the second liquid tank 62 can be adjacently arranged side by side; the fixing plate 6 is disposed on a printing platform (not shown in the figure), and under the driving of the printing platform, the fixing plate 6 drives the plurality of projection assemblies to move back and forth above the first liquid tank 61 and the second liquid tank 62, and performs 3D printing on the first liquid tank 61 and the second liquid tank 62 respectively. Wherein, last elevating system and the translation mechanism of being provided with of print platform can drive fixed plate 6 and go up and down displacement and translation to the realization is printed the 3D of cistern 6, and specifically, print platform can adopt the print platform who commonly uses among the prior art, and here is no longer repeated.

It should be noted that, in the embodiment of the present invention, in addition to two liquid tanks, namely, the first liquid tank 61 and the second liquid tank 62, three liquid tanks, four liquid tanks, or more liquid tanks may be adopted, and when three liquid tanks are adopted, the liquid tanks may be arranged in a zigzag manner or a straight manner; when four liquid tanks are adopted, the liquid tanks can be arranged in a 'tian' -shape, the number of the adopted liquid tanks is not specifically limited, and in the actual printing process, the number of the adopted liquid tanks can be comprehensively determined according to the motion track of the projection assembly and the required liquid level smoothing time under the process conditions of adopting different liquid resins and the like, so that the printing efficiency of the projection assembly is improved as much as possible under the condition of low cost.

It can be understood that, in the actual 3D printing process, after the projection assembly performs projection curing on the liquid resin on the top surface of the liquid tank 6, the lifting assembly in the liquid tank 6 drives the cured resin layer to move towards the bottom of the liquid tank 6, so that the projection assembly can perform printing on the next layer of resin on the top surface of the liquid tank 6. Because liquid resin is comparatively sticky and its mobility is poor, consequently, after the resin layer after the lifting unit drive solidification moved towards cistern 6 bottom, the resin unevenness of cistern 6 top surface need adopt the scraper to strickle off cistern 6 top surface and after the slow levelling of resin of the moment of stewing, the projection subassembly could carry out next layer to cistern 6 and print. Generally speaking, it probably takes several seconds for the projection subassembly to carry out the projection solidification to a layer of liquid resin, and the scraper is strickleed off the cistern 6 top surface and is stood the levelling and then probably takes several seconds, ten seconds's time even, in strickleing off the liquid level and waiting for the time of the levelling of standing, the projection subassembly is in idle state in fact for entire system's efficiency is lower.

In the embodiment of the present invention, the first liquid tank 61 and the second liquid tank 62 are disposed below the projection component, when the projection component performs projection printing on the liquid level of the first liquid tank 61, the second liquid tank 62 can be scraped and leveled with a stationary liquid, and after the projection component completes projection of the resin layer of the first liquid tank 61, the projection component moves to the upper side of the second liquid tank 62, and performs projection printing on the second liquid tank 62; in a similar way, when projection subassembly carries out the projection to the liquid level of second liquid tank 62 and prints, can carry out the liquid level to first liquid tank 61 and strickle and the levelling of stewing, wait for after projection subassembly finishes the projection to the resin layer of second liquid tank 62, projection subassembly removes the top to first liquid tank 61 again, print first liquid tank 61 projection, so circulate, projection subassembly is in operating condition all the time, no longer need wait for the scraper to strickle the liquid level and the levelling of stewing, 3D printing's efficiency has greatly been improved.

Specifically, a partition plate 63 may be provided at an intermediate position inside the liquid tank 6, the partition plate 63 being vertically provided in the liquid tank 6 for dividing the liquid tank 6 into the first liquid tank 61 and the second liquid tank 62. Furthermore, the partition 63 is spaced from the bottom of the liquid tank 6 by a gap through which the first liquid tank 61 and the second liquid tank 62 communicate. The bottom of the first liquid tank 61 is communicated with the bottom of the second liquid tank 62, so that liquid resin in the first liquid tank 61 and liquid resin in the second liquid tank 62 can be communicated with each other, and the top surfaces of the first liquid tank 61 and the second liquid tank 62 are ensured to be at the same height; meanwhile, the bottoms of the first liquid tank 61 and the second liquid tank 62 are communicated, so that the interference of accumulated liquid on the scraper to the liquid levels of the first liquid tank 61 and the second liquid tank 62 can be eliminated.

In the embodiment of the present invention, in order to ensure that the first liquid tank 61 and the second liquid tank 62 can be independently used for leveling operation and do not affect each other, the first liquid tank 61 is provided with the first scraper 611, the second liquid tank 62 is provided with the second scraper 621, and the first scraper 611 and the second scraper 621 work alternately to level the liquid level of the first liquid tank 61 and the liquid level of the second liquid tank 62. The installation manner and the driving manner of the first scraper 611 and the second scraper 621 are the prior art, and are not described herein again.

Referring to fig. 1 and 2, in a first example provided by the embodiment of the present invention, the light source is a laser light source 11, and the polarizing element includes a first polarizer 31. When the light source is the laser light source 11, the laser itself has excellent polarization characteristics, so that the modulation of the light intensity can be realized only by arranging the first polarizing film 31 between the display 4 and the projection objective 5, and the energy utilization rate is improved.

Referring to fig. 4 and 5, fig. 4 is a schematic structural diagram of a 3D printing apparatus according to a second example provided by the embodiment of the present invention; fig. 5 is a front view of a 3D printing apparatus according to example two provided by the present invention.

In the second example provided by the embodiment of the present invention, the light source is an LED light source 12, the polarizing element includes a second polarizing film 32 and a third polarizing film 33, the second polarizing film 32 is disposed between the light uniformizing device 2 and the display 4, and the third polarizing film 33 is disposed between the display 4 and the projection objective 5. When the light source is the LED light source 12, the second polarizer 32 is required to be a polarizer and the third polarizer 33 is required to be an analyzer, which are respectively located at the upper and lower sides of the LCD. When unpolarized light emitted from the LED passes through the second polarizer 32, it becomes polarized light, and when the polarized light is modulated by the phase of the LCD, it forms a specific polarization distribution corresponding to the signal applied by the LCD, and then the polarization distribution is transmitted to the third polarizer 33, so as to realize the modulation of the light intensity. In addition, the top of the LED light source 12 is provided with the heat dissipation device 7, the heat dissipation device 7 is tightly attached to the top of the LED light source 12, heat of the LED light source 12 can be quickly conducted and dissipated to the outside, and quick heat dissipation is achieved. The heat dissipation device 7 may be a metal heat dissipation body with a plurality of heat dissipation fins, which belongs to the prior art and is not described herein again.

While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A3D printing apparatus, comprising:

2. The 3D printing apparatus according to claim 1, wherein a partition is provided in the liquid tank, the partition being vertically provided in the liquid tank for dividing the liquid tank into the first liquid tank and the second liquid tank.

3. The 3D printing apparatus according to claim 2, wherein the partition is spaced from the tank bottom by a gap through which the first tank communicates with the second tank.

4. The 3D printing device according to any of claims 1-3, wherein a first scraper is arranged on the first fluid bath and a second scraper is arranged on the second fluid bath, the first and second scrapers working alternately to scrape off the fluid level of the first and second fluid baths.

5. The 3D printing device according to claim 1, wherein the light source is a laser light source and the polarizing element comprises a first polarizer.

6. The 3D printing apparatus according to claim 1, wherein the light source is an LED light source, the polarizing element comprises a second polarizer and a third polarizer, the second polarizer is disposed between the light unifying device and the display, and the third polarizer is disposed between the display and the projection objective.

7. The 3D printing apparatus according to claim 6, wherein a heat sink is provided on top of the LED light source.

8. The 3D printing device according to claim 1, wherein the display is an LCD liquid crystal display.