CN110509558A - A 3D printer supported by a saturated NaCl solution - Google Patents

Abstract

The invention discloses a 3D printer supported by a saturated NaCl solution, including a 3D printer, a solution pump is installed through the lower surface of the 3D printer, and a solution storage tank is connected to the input end of the solution pump. The inner wall of the printer is provided with a liquid level sensor, the liquid level sensor and the solution pump are connected to the external control system, and the medium is pumped into the 3D printer through the solution pump, and the support in the traditional 3D printing is replaced by the medium, which greatly It facilitates the printing of part models with suspended structures, saves the printing time of supporting materials and supporting materials, improves the printing accuracy and printing efficiency to a certain extent, and also saves the material cost of 3D printing. Through the setting of the sealing plate, it makes During the printing process, the internal medium will not flow out, and after the printing is completed, the gear rack is driven by rotating the gear, so as to control the opening of the sealing plate and take out the printed items conveniently.

Description

A 3D printer supported by a saturated NaCl solution

technical field

The invention relates to the technical field of 3D printing, and specifically relates to a 3D printer supported by a saturated NaCl solution.

Background technique

The existing 3D printing is to divide the parts into several layers in the direction of the fixed horizontal pallet surface, and layer by layer superimposed materials to manufacture the entity. Support, when using a 3D printer to print a model, when the angle between a certain surface of the model and the vertical line is greater than 45° and the suspension is greater than 5mm or the model is a bridge structure suspension greater than 5mm, the material will fall before solidification. At this time, a support structure needs to be designed. Otherwise, without support, it will not be possible to stack and form, and the printing will collapse, and the required model cannot be printed. Therefore, support must be added to the part with suspended structure. However, after the model is formed, the support material is not needed and needs to be removed. In this way, if the part is complex, a lot of support material will be needed, which becomes A waste of material also increases the material cost. At the same time, the surface quality of the model surface in contact with the support material is generally poor, and it is difficult to meet the higher precision requirements. In addition, the process of removing the support material is not very easy. Everyone who has done 3D printing has a deep understanding of the time-consuming and labor-intensive process of removing the support: if the strength is not enough, the support is difficult to remove; if the force is too large, the model will be damaged.

The common methods of adding support mainly include adding support manually and adding support by software. However, adding support manually is cumbersome and has some disadvantages: due to the influence of human factors, the quality of support addition depends on the experience and experience of equipment operators. Responsibility, so the quality of support addition is difficult to guarantee, and adding support manually is not very flexible, and some parameters need to be changed. Supports are automatically generated by software, which often requires a lot of calculations by the system, and the cost of raw materials consumed by the support mechanism is not low. It will also cause unsatisfactory surface quality of the contact surface between the model and the support when the parts are manufactured and separated from the support. Case.

Contents of the invention

The object of the present invention is to provide a 3D printer supported by a saturated NaCl solution to solve the problems raised in the above-mentioned background technology.

In order to achieve the above object, the present invention provides the following technical solutions: a 3D printer supported by a saturated NaCl solution, including a 3D printer, the lower surface of the 3D printer is provided with a solution pump, and the input end of the solution pump is connected to There is a solution storage tank, and the inner wall of the 3D printer is provided with a liquid level sensor, and both the liquid level sensor and the solution pump are connected to an external control system.

Preferably, one side wall of the 3D printer is provided with an opening, the side wall of the opening is slidably connected with a sealing plate, the outer surface of the sealing plate is provided with a rack, and the outer surface of the 3D printer is provided with a second A motor, the output shaft of the first motor is fixedly connected with a gear, and the gear meshes with the rack.

Preferably, the inner side wall of the opening is provided with a trapezoidal chute, and the inner side wall of the trapezoidal chute is provided with a gasket, and the side wall of the sealing plate is trapezoidal at the inner wall of the trapezoidal chute, and Match with the trapezoidal chute.

Preferably, the inner and lower surface of the 3D printer is provided with a tray guide rod, the outer wall of the tray guide rod is slidably connected with a support plate, the upper surface of the support plate is provided with a tray, and the outer and lower surface of the 3D printer is A second motor is fixedly connected, the output shaft of the second motor passes through the lower side wall of the 3D printer and is connected with a screw rod, the end surface of the support plate is provided with a through hole, and the screw rod passes through the through hole , and the inner wall of the through hole is provided with an internal thread matched with the screw rod.

Preferably, four corners of the support plate are penetrated with leveling bolts, and the leveling bolts are all screwed to the pallet.

Preferably, a spring is provided on the outer side wall of the leveling bolt and between the support plate and the tray.

Preferably, a saturated NaCl solution is placed inside the solution storage tank.

Compared with the prior art, the beneficial effect of the present invention is: a 3D printer supported by a saturated NaCl solution, pumps the medium into the 3D printer through the solution pump, and replaces the support in the traditional 3D printing with the medium, greatly It facilitates the printing of part models with suspended structures, saves the printing time of supporting materials and supporting materials, improves the printing accuracy and printing efficiency to a certain extent, and also saves the material cost of 3D printing. Through the setting of the sealing plate, it makes During the printing process, the internal medium will not flow out, but after the printing is completed, the gear rack is driven by rotating the gear, thereby controlling the opening of the sealing plate, which is convenient for taking out the printed items, and also facilitates the maintenance and repair of the device. The setting of the tray, during the printing process, the tray is raised and then lowered layer by layer, so that when the medium is used as a support, the liquid level only needs to be kept at the same level all the time, without having to be adjusted along with the printing, so that The liquid level sensor only needs to be set at the height of the required support, that is, the part above it, which is safe and reliable.

Description of drawings

Fig. 1 is the front view sectional structure schematic diagram of the present invention;

Fig. 2 is the front view structure schematic diagram of the present invention;

Fig. 3 is a top structural schematic view of the sealing plate of the present invention.

In the figure: 1-3D printer, 2-solution pump, 3-liquid level sensor, 4-opening, 5-sealing plate, 6-rack, 7-first motor, 8-gear, 9-trapezoidal chute, 10 -sealing gasket, 11-tray guide rod, 12-support plate, 13-tray, 14-second motor, 15-screw rod, 16-through hole, 17-spring, 18-solution storage tank, 19-leveling bolt .

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Figures 1-3, the present invention provides a technical solution: a 3D printer supported by a saturated NaCl solution, including a 3D printer 1, the 3D printer 1 is a conventionally known device on the market, and will not be described in detail herein. The lower surface of the 3D printer 1 is provided with a solution pump 2, the input end of the solution pump 2 is connected to a solution storage tank 18, and the solution pump 2 can pump the solution in the solution storage tank 18 into the 3D printer. In the printing room of the printer, the solution in the 3D printer can also be reversely pumped back into the solution storage tank 18. The inner wall of the 3D printer 1 is provided with a liquid level sensor 3, and the liquid level sensor 3 is a The spiral water level sensing line is stretched according to the required length and then suspended vertically in the solution. The water level of the solution is detected by induction. The water level signal is transmitted to the digital display water level automatic control alarm through the two-wire water level sensor. Display the water level, three independent switch outputs are provided by the automatic water level control relay, the ultra-high water level alarm relay, and the ultra-low water level alarm relay. There are two automatic water level control relays. In the closed case of the 3D printing device; the second relay controls the connection of the solution pump 2 to pump the solution back from the closed case of the 3D printing device back to its solution storage room, and the liquid level sensor 3 and the solution pump 2 are connected to the outside world The control system is connected, and the liquid level sensor 3 transmits the electrical signal to the external control device, and the control device also processes and calculates the signal, thereby controlling the automatic water level control relay to realize the liquid level control in the 3D printer 1 .

Specifically, one side wall of the 3D printer 1 is provided with an opening 4, the side wall of the opening 4 is slidably connected with a sealing plate 5, the outer surface of the sealing plate 5 is provided with a rack 6, and the 3D printer 1 The outer surface of the printer 1 is provided with a connection seat, the surface of the connection seat is provided with a first motor 7, the output shaft of the first motor 7 is fixedly connected with a gear 8, and the gear 8 meshes with the rack 6, Through the rotation of the gear 8, the rack 6 can be driven, so that the sealing plate 5 can slide up and down, and the opening and closing of the 3D printer 1 can be realized.

Specifically, the inner side wall of the opening 4 is provided with a trapezoidal chute 9, and the inner side wall of the trapezoidal chute 9 is provided with a gasket 10, and the side wall of the sealing plate 5 is located in the trapezoidal chute 9 The inner wall of the chute is in a trapezoidal shape that matches the trapezoidal chute 9. By setting the chute into a trapezoidal shape, the sliding connection can be made tighter, so that the seal can be achieved while sliding freely, so as to avoid internal The solution flows out from the slip joint.

Specifically, the inner and lower surface of the 3D printer 1 is provided with a tray guide 11, and the bottom of the tray guide 11 is connected to the lower surface of the 3D printer 1 by a limit block provided at the bottom thereof. The outer side wall of 11 is slidably connected with a support plate 12, the end surface of the support plate 12 is provided with a guide rod seat, and the guide rod seat is slidably connected with the tray guide rod 11, and the guide rod seat is a cylindrical cavity , increasing the contact area with the tray guide rod 11, thereby making the sliding process more stable, the upper surface of the support plate 12 is provided with a tray 13, and the 3D printer 1 is placed on the tray 13 For 3D printing, the outer and lower surface of the 3D printer 1 is fixedly connected with a second motor 14, and there are two second motors 14, and the output shaft of the second motor 14 runs through the lower side wall of the 3D printer 1 Connected with a screw 15, the end surface of the support plate 12 is provided with a through hole 16, the screw 15 passes through the through hole 16, and the inner side wall of the through hole 16 is provided with a Cooperating internal thread, when the second motor 14 rotates, the second motor 14 drives the screw rod 15 to rotate, because the support plate 12 is limited by the tray guide rod 11 and the screw rod 15, only It can slide up and down, and when the screw rod 15 rotates, the function of rising and falling of the support plate 12 is realized by the internal thread matched with it. When printing, the support plate 12 rises to the designated position and then descends layer by layer The method of printing is carried out, so that the printing nozzle only needs to do two-dimensional movement of the plane. The advantage of this is that during the printing process, the upper surface of the printed object is always at the same height. When printing a structure that needs support, the solution only needs to rise to At the same height as the printed object, there is no need to gradually adjust the liquid level height along with the printing process, so that only one water level switch A is set at the same height of the upper surface of the printed object, and the other water level switch is placed at the low water level B position (the normal height of the liquid level when the solution does not need to be supported), when a suspended structure is encountered during the 3D printing process and needs to be supported, the first relay is closed. Enter the solution; when the water rises to the high water level A position, the relay is disconnected, the water pump or solenoid valve is powered off, the switch of the solution channel tube is closed, and the liquid level remains unchanged. A very thin support plate (required for the suspended structure), after the support plate is printed, the printed model moves into the solution, causing the liquid level to rise, and the liquid level exceeds the water level switch A, the solution channel switch is opened, and the second relay of the water level controller is closed. The solution pump pumps the solution back, and then the solution goes to the low water level B position, continuously reciprocating, and the solution height is controlled by the water level controller, so that the position accuracy of the solution water level is strictly guaranteed, and the position accuracy of the support structure is also ensured. Thus, the printing accuracy of the printing model is guaranteed.

Specifically, the four corners of the support plate 12 are provided with leveling bolts 19, and the leveling bolts 19 are all screwed to the tray 13. By rotating the leveling bolts 19, the support plate can be adjusted. 12 Perform leveling.

Specifically, a spring 17 is provided on the outer wall of the leveling bolt 19 and between the support plate 12 and the tray 13, and the spring 17 makes the thread of the leveling bolt 19 and the thread of the tray tight. Fit, increase friction, so that the bolts will not loosen during the working process of the device.

Specifically, a saturated NaCl solution is placed inside the solution storage tank 18 , because the saturated NaCl solution has a greater buoyancy, thereby providing a greater supporting force.

Working principle: when the present invention works, the second motor 14 connected to the screw rod 15 is started, and under the action of the screw rod 15 and the tray guide rod 11, the support plate 12 and the tray 13 are driven upward to the designated position, and the nozzle returns to the zero position at the same time And start preheating. After the temperature reaches the melting point of the photosensitive resin, melt the material. According to the algorithm trajectory specified by the printer, the melted material will be piled up layer by layer. During the process, if there is a need for support during printing, Start the first motor 7, work through the gear 8 and the rack 6, close the liftable closed door and press the seal tightly, after the sealing is completed, the solution pump 2 starts to work, and the saturated NaCl solution is pumped into the cabinet from the solution storage tank 18, At this time, the liquid level sensor 3 starts to work. When the water level reaches the sensor monitoring position, that is, the required water level, the solution pump stops working. Due to the density difference between the liquid photosensitive resin and saturated saline, the nozzle can print on the liquid surface. A layer of 2mm-thick small plane is used as a support plate. After the printing is completed, the solution pump 2 starts to pump the solution in the chassis back to the storage box. Print parts.

In the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

The standard parts used in the present invention can be purchased from the market, and the special-shaped parts can be customized according to the instructions and the records of the accompanying drawings. The specific connection methods of each part adopt mature bolts, rivets, welding, etc. in the prior art. Conventional means, machinery, parts and equipment all adopt conventional models in the prior art, plus circuit connections adopt conventional connection methods in the prior art, and will not be described in detail here.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (7)

1. a kind of 3D printer for making to support with saturation NaCl solution, including 3D printer (1), it is characterised in that: the 3D is beaten The lower surface of print machine (1), which is run through, is equipped with solution pump (2), and the input end pipe of the solution pump (2) is connected with solution storage case (18), The inner wall of the 3D printer (1) is equipped with liquid level sensor (3), and the liquid level sensor (3) and the solution pump (2) are and outside The connection of boundary's control system.

2. a kind of 3D printer for making to support with saturation NaCl solution according to claim 1, it is characterised in that: the 3D The side side wall of printer (1) is equipped with opening (4), and the side walls of the opening (4) are connected with sealing plate (5), the sealing The outer surface of plate (5) is equipped with rack gear (6), and the outer surface of the 3D printer (1) is equipped with first motor (7), the first motor (7) output shaft is fixedly connected with gear (8), and the gear (8) is engaged with the rack gear (6).

3. a kind of 3D printer for making to support with saturation NaCl solution according to claim 2, it is characterised in that: described to open The inner sidewall of mouth (4) is equipped with ladder chute (9), and the inner sidewall of the ladder chute (9) is equipped with gasket (10), the sealing The side wall of plate (5) and it is located at trapezoidal at the inner wall of the ladder chute (9), and matches with the ladder chute (9).

4. a kind of 3D printer for making to support with saturation NaCl solution according to claim 1, it is characterised in that: the 3D The interior lower surface of printer (1) is equipped with pallet guide rod (11), and the lateral wall of the pallet guide rod (11) slidably connects support plate (12), the upper surface of the support plate (12) is equipped with pallet (13), and the outer lower surface of the 3D printer (1) is fixedly connected with the Two motors (14), lower wall of the output shaft of second motor (14) through the 3D printer (1) are connected with screw rod (15), The end face of the support plate (12) is equipped with through-hole (16), and the screw rod (15) passes through the through-hole (16), and the through-hole (16) Inner sidewall be equipped with the internal screw thread that matches with the screw rod (15).

5. a kind of 3D printer for making to support with saturation NaCl solution according to claim 4, it is characterised in that: the branch The quadrangle of fagging (12), which is run through, is equipped with leveling bolt (19), and the leveling bolt (19) is spirally connected with the pallet (13).

6. a kind of 3D printer for making to support with saturation NaCl solution according to claim 5, it is characterised in that: the tune The lateral wall of flat bolt (19) and between the support plate (12) and the pallet (13) be equipped with spring (17).

7. a kind of 3D printer for making to support with saturation NaCl solution according to claim 1, it is characterised in that: described molten The inside of liquid storage bin (18) is placed with saturation NaCl solution.