Liquid level stabilizing system of SLA type 3D printer and 3D printer

Abstract

The liquid level stabilizing system of the SLA type 3D printer and the 3D printer comprise a main material tank, an auxiliary material tank, an adjusting pump and a control unit, the auxiliary material tank is arranged beside the main material tank, the adjusting pump is arranged between the auxiliary material tank and the main material tank, and the control unit controls the auxiliary material tank in the printing process. And the cross sectional area of the current printing layer of the model is calculated in real time according to the slicing data, and the adjusting pump is controlled to transfer resin between the main material groove and the auxiliary material groove. The liquid level adjusting device has the advantages that on the premise that no liquid level detection device needs to be installed, the control unit conducts real-time operation and controls the adjusting pump to conduct corresponding resin transfer between the main material tank and the auxiliary material tank, so that the liquid level height in the main material tank is kept stable, the liquid level adjusting process is faster and more accurate, and the working efficiency is improved. Therefore, the equipment printing efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to 3D printing technical field especially, it relates to a liquid level stabilizing system of SLA type 3D printer and 3D printer. BACKGROUND

[0002] SLA type 3D printer is through laser beam irradiation resin tank in resin instantaneous polymerization into solid, layer printing forming to construct three-dimensional object's equipment, because the height of laser focal point is fixed after debugging, therefore requires the liquid level in resin tank also to keep the same height as far as possible every time printing, this needs to have corresponding system to adjust in real time.

[0003] Prior art is through liquid level detection device measurement liquid level height variation, then through the volume of change of floating block immersed in liquid and adjust.This mode can exist following problem: first, liquid level height detection device is indispensable, and this kind of detection device is higher in accuracy requirement, so the cost is relatively higher, second, this kind of sensor is basically measured using laser reflection, even if liquid level has slight fluctuation, will influence the accuracy of measurement, more troublesome is because different color resin reflectivity is different, so if changed different color resin, the reading of sensor will also change greatly, even for some high transparency resin, ordinary sensor cannot be used, must replace the higher cost special sensor (the laser of ordinary sensor does not reflect to transparent liquid, causes sensor to have no reading), furthermore, this scheme is adjusted, must first measure liquid level height variation value, then passively carries out the reverse compensation of liquid, and compensation is also the process of up and down oscillation around target value (such as the depth of floating block needs to be repeatedly adjusted up and down), until liquid level error value reaches the set error range, will stop, cannot realize accurate quantitative adjustment, even if each adjustment only needs a few seconds, for the more layered big model, the whole printing process needs to be adjusted hundreds of times, accumulates also very long time, seriously influence the printing efficiency of equipment. SUMMARY

[0004] The utility model relates to the technical problem that the utility model wants to solve is in view of the deficiency of above-mentioned prior art, provide a kind of liquid level stabilizing system of SLA type 3D printer and 3D printer.

[0005] The technical scheme that the utility model solves above-mentioned technical problem is as follows: a kind of liquid level stabilizing system of SLA type 3D printer, including main tank, auxiliary tank, regulating pump and control unit, the auxiliary tank is arranged in the main tank side, and the regulating pump is arranged between the two, the main tank is provided with the forming platform and platform support frame required for printing.

[0006] The control unit can calculate the cross-sectional area of the current printing layer of the model in real time according to the slice data during the printing process.

[0007] The control unit can control the adjusting pump to transfer the resin between the main tank and the auxiliary tank.

[0008] The displacement of the adjusting pump is fixed.

[0009] The beneficial effects of the SLA type 3D printer are as follows: the change of the liquid level during the operation of the SLA type 3D printer is mainly caused by two factors: 1. the platform support frame is continuously lowered during the printing process, and the volume immersed in the resin is more and more, which causes the liquid level to rise; 2. when each cross section of the model is changed from liquid to solid, the volume changes before and after solidification due to the existence of material shrinkage, and the above two factors are superimposed, which causes the liquid level height in the resin tank to change after each layer is printed.

[0010] The liquid level stabilizing system of the SLA type 3D printer of the utility model, when in use, only needs to input the cross-sectional area of the platform support frame of the equipment, the layer height of the model slice, the current resin yield and other initial parameters in advance, calculates the cross-sectional area of each slice of the model and the cross-sectional area of the platform support frame through the control unit without the need to install any type of liquid level detection sensor, and then uses the layer height and the resin shrinkage rate in the initial parameters to accurately calculate the total change of the volume of the resin in the main tank after the solidification of the layer cross section (cross-sectional area x layer height = single layer volume), so as to control the adjusting pump to transfer the corresponding resin (increase or decrease) between the main tank and the auxiliary tank, and keep the liquid level in the main tank stable.

[0011] Compared with the prior art, the method can calculate the accurate change of the volume of the liquid in advance before the end of each layer printing, the adjustment process is quantitative, accurate and one-time, the system is not affected by the change of the resin color, the various liquid level detection devices can be cancelled through the utility model, the cost is saved, the liquid level adjustment process is faster and more accurate, and the printing efficiency of the equipment is improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 The utility model discloses a structure diagram of the liquid level stabilizing system of the SLA type 3D printer.

[0013] Figure 2 The utility model discloses a control logic diagram.

[0014] In the drawings, the components represented by each reference numeral are listed as follows:

[0015] 1, platform support frame, 2, forming platform, 3, control unit, 4, regulating pump, 5, auxiliary tank, 6, main tank. DETAILED DESCRIPTION

[0016] The principles and characteristics of the present application are described below in conjunction with the accompanying drawings, and the examples are only used to explain the present application and are not intended to limit the scope of the present application.

[0017] As Figure 1 shown, in one or more embodiments of the present application, the liquid level stabilizing system of the SLA type 3D printer comprises a main tank 6, an auxiliary tank 5, a regulating pump 4 and a control unit 3, the auxiliary tank 5 is arranged beside the main tank 6, and the regulating pump 4 is arranged between the two.

[0018] The main tank 6 is provided with a forming platform 2 and a platform support frame 1 required for printing.

[0019] The control unit 3 can calculate the cross-sectional area of the current printing layer model in real time according to the slice data during the printing process.

[0020] The control unit 3 can control the regulating pump 4 to transfer the resin between the main tank 6 and the auxiliary tank 5.

[0021] The displacement of the regulating pump 4 is fixed.

[0022] The liquid level stabilizing system of the SLA type 3D printer of the present application does not need to add other additional liquid level detection devices, and according to the layer height and the cross-sectional area of each layer slice, the control unit can calculate the volume of the current printing layer model (cross-sectional area x layer height), and then add the volume of the platform support frame sinking into the resin, so as to accurately calculate the accurate change amount of the resin volume after the layer model is solidified, and finally control the regulating pump to supplement or reduce the resin in the main tank, so as to keep the liquid level stable, and upgrade the liquid level regulation from the traditional qualitative and oscillation process to more accurate and efficient quantitative control.

[0023] The above is only a preferred embodiment of the present application, and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A liquid level stabilizing system for an SLA type 3D printer, characterized in that, It comprises a main tank, an auxiliary tank, an adjusting pump and a control unit, the auxiliary tank is arranged beside the main tank, and the adjusting pump is arranged between the two tanks; a forming platform and a platform support frame required for printing are arranged in the main tank.

2. The liquid level stabilization system for SLA type 3D printers according to claim 1, characterized in that, The control unit can calculate the cross-sectional area of the current printing layer of the model in real time according to the slicing data during the printing process.

3. The liquid level stabilization system for SLA type 3D printers according to claim 1, characterized in that, The control unit can control the adjusting pump to transfer the resin between the main tank and the auxiliary tank.

4. The liquid level stabilization system for SLA type 3D printers according to claim 1, characterized in that, The displacement of the adjusting pump is fixed. 5.A 3D printer, which comprises the liquid level stabilizing system of the SLA type 3D printer according to any one of claims 1-4.

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