CN111619106A

CN111619106A - Intelligent feeding system of LCD printer

Info

Publication number: CN111619106A
Application number: CN202010418141.0A
Authority: CN
Inventors: 许扬; 施伟利; 刘小俊; 匡鑫
Original assignee: Huanggang Normal University
Current assignee: Huanggang Normal University
Priority date: 2020-05-18
Filing date: 2020-05-18
Publication date: 2020-09-04
Also published as: CN115008736A

Abstract

An intelligent feeding system of an LCD printer, comprising: the device comprises an upper cover, a bottle body, an L-shaped partition plate, a motor, a rotary baffle plate with holes, a guide pipe, a detection arm, an LED infrared probe, a controller, a power supply and a bottom plate with a sucker; the LED infrared probe consists of an LED infrared transmitter and a receiver. According to the invention, the LED emitter emits an infrared signal, and the LED receiver receives the infrared signal after the liquid level of the liquid resin is reduced; the controller outputs a motor forward rotation driving signal, the motor drives the rotating baffle with holes to rotate forward by 45 degrees, holes of the rotating baffle with holes are overlapped with holes arranged on the L-shaped partition plate, and liquid resin in the bottle body sequentially passes through the holes and then flows out of the guide pipe; and when the liquid level of the liquid resin rises to submerge the LED receiver again so that the LED receiver stops receiving the infrared signal, the controller outputs a motor reverse rotation driving signal, and after the motor drives the rotating baffle with the hole to rotate reversely for 45 degrees, the liquid resin stops flowing out. The invention can effectively improve the working efficiency of the LCD printer and reduce the manual supervision cost and the printing failure probability.

Description

Intelligent feeding system of LCD printer

Technical Field

The invention relates to the field of raw material feeding of 3D printers, in particular to an intelligent feeding system of an LCD printer.

Background

The 3D printer is used as an important rapid forming means, the basic principle of additive manufacturing has great potential in the aspects of energy conservation, emission reduction, raw material conservation and the like, and the wide range of forming printing materials brings great market and advantages for the printer. The equipment that adopts multiple 3D to print the principle at present can print all kinds of materials. The material comprises various metal materials, plastic materials, transparent semitransparent materials, casting materials, cement structures, sand models and other materials with different functions and different performances. The LCD printer based on the principle of photocuring technology has the features of high precision, fast printing speed, low shrinkage of cured product, low cost, etc. and is used widely in various industries.

When the LCD printer works, photosensitive resin raw materials are poured into a bottom trough, and light waves with specific wavelengths are used for irradiating the resin from the bottom through a transparent bottom plate of a material box to enable the resin to be cured layer by layer. The prior art LCD printer carriage is generally a clear-bottomed, uncovered box. In actual operation, the printer trough is not designed too high to influence the forming height, and the liquid photosensitive resin poured into the trough is easily influenced by moisture in the air. Therefore, the amount of the photosensitive resin in the material box is reduced on the premise of ensuring the resin consumption required by the printed finished product. However, since the actual amount of resin is difficult to estimate, the resin is fed many times during printing, so that the actual operation is complicated.

The existing solutions have two kinds, one is to design a cavity with variable volume inside the LCD platform to store photosensitive resin, and gradually reduce the cavity volume with the consumption of resin during printing to convey the resin into the trough. This solution allows to continuously supply the photosensitive resin while maintaining the minimum quantity required for the photosensitive resin printing in the tank. However, this solution is complicated in structure, and occupies space of the LCD and light source of the printer, which affects heat dissipation. The corresponding structural design should be completed at the beginning of the printer design, and the manufactured finished LCD printer is difficult to further utilize the solution. And secondly, a feeding barrel is attached to the surface of the LCD platform, a laser probe or a pressure probe is used for detecting the material storage, and a self-sucking pump is used for assisting in feeding. This method is relatively simple in structure, but it is bulky and requires a large amount of LCD platform space. It is also necessary to complete the corresponding structure design at the beginning of the design of LCD printer. Is difficult to be applied to most of the commercial finished LCD printers.

Disclosure of Invention

Aiming at the problems, the invention provides an intelligent feeding system of an LCD printer. Meanwhile, the system is compatible with a finished product LCD printer, and is convenient for upgrading and utilizing the scheme.

The technical scheme of the device is that the intelligent feeding device applied to the LCD printer comprises: the device comprises an upper cover, a bottle body, an L-shaped partition plate, a motor, a rotary baffle plate with holes, a guide pipe, a detection arm, an LED infrared probe, a controller, a power supply and a bottom plate with a sucker; the LED infrared probe consists of an LED infrared transmitter and an LED infrared receiver.

The upper cover is arranged at the top of the bottle body; the bottom plate with the sucker is arranged at the bottom of the bottle body; the lower side of the interior of the bottle body is divided into two areas by an L-shaped partition plate, the upper area is used for storing liquid resin, and the lower area is respectively provided with the power supply, the controller and the motor; the detection arm and the catheter are fixed on the same side face of the bottle body, and the tail end of the detection arm is provided with an LED infrared probe; a hole is formed in the middle of the L-shaped partition plate and corresponds to the hole of the rotary baffle plate with the hole; a guide pipe is arranged at a position corresponding to the outer side of the hole arranged at the middle position of the L-shaped partition plate; the LED infrared probe is arranged above a resin trough of the LCD printer;

the motor is connected with the rotary baffle plate with the hole through a bearing; the controller is respectively connected with the LED infrared transmitter, the LED infrared receiver and the motor in a wired mode; the power supply is respectively connected with the controller and the motor in sequence in a wired mode.

The technical scheme of the invention is an intelligent feeding method applied to an LCD printer, which comprises the following steps:

step 1: the controller controls the LED emitter to emit infrared signals intermittently, and after the liquid level of liquid resin in a resin tank of the LCD printer is reduced, the controller receives the infrared signals through the LED receiver;

step 2: the controller outputs a motor forward rotation driving signal, controls the motor to rotate forward to drive the perforated rotating baffle to rotate forward for a certain angle, the hole of the perforated rotating baffle is superposed with the hole arranged in the middle of the L-shaped partition plate, and the liquid resin in the bottle body sequentially passes through the hole arranged in the middle of the L-shaped partition plate and the hole of the perforated rotating baffle and flows out of the guide pipe to a resin trough of an LCD printer;

and step 3: and when the liquid level of the liquid resin in the resin tank of the LCD printer rises to submerge the LED receiver again, the LED receiver stops receiving the infrared signal, the controller outputs a motor reverse rotation driving signal to control the motor to rotate reversely so as to drive the rotary baffle with holes to rotate reversely for a certain angle, the holes of the rotary baffle with holes are separated from the holes arranged in the middle of the L-shaped partition plate, and the liquid resin in the bottle body stops flowing out to the LCD resin tank.

The intelligent feeding system provided by the invention utilizes the large-torque micro speed reducing motor as a valve system, utilizes the LED infrared emitter and the detector to detect the liquid level height, combines a cavity with a certain volume to store and intelligently supply the raw materials for the trough printing of the LCD photocuring 3D printer, effectively improves the convenience and the working efficiency of the LCD printer, and reduces the manual maintenance cost and the printing failure probability.

Drawings

FIG. 1: overall structure and circuit block diagram;

FIG. 2: the rotating baffle with holes rotates to control whether the resin flows out or not.

The device comprises an upper cover (1), a bottle body (2), an L-shaped partition plate (3), a motor (4), a rotary baffle plate with holes (5), a guide pipe (6), a detection arm (7), an LED infrared probe (8), a controller (9), a power supply (10) and a bottom plate with a sucker (11).

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further 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. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

An intelligent feeding device applied to an LCD printer is shown in figure 1. The method comprises the following steps: the device comprises an upper cover (1), a bottle body (2), an L-shaped partition plate (3), a motor (4), a rotary baffle plate (5) with a hole, a guide pipe (6), a detection arm (7), an LED infrared probe (8), a controller (9), a power supply (10) and a bottom plate (11) with a sucker; the LED infrared probe (8) consists of an LED infrared transmitter and an LED infrared receiver;

the device is fixed on the table top of the LCD printer in an adsorption way through a sucker on a bottom plate, and a guide pipe (6) and a detection arm (7) are both positioned in a resin trough of the LCD printer.

As shown in fig. 1, the upper cover (1) is placed on the top of the bottle body (2); the bottom plate (11) with the sucker is arranged at the bottom of the bottle body (2); as shown in fig. 2, the lower side of the interior of the bottle body (2) is divided into two areas by an L-shaped partition (3), the upper area is used for storing liquid resin, and the lower area is respectively provided with the power supply (10), the controller (9) and the motor (4); the detection arm (7) and the catheter (6) are fixed on the same side surface of the bottle body (2), and the tail end of the detection arm (7) is provided with an LED infrared probe (8); a hole is formed in the middle of the L-shaped partition plate (3) and corresponds to the hole of the rotary baffle plate (5) with the hole; a guide pipe (6) is arranged at the position corresponding to the outer side of the hole arranged at the middle position of the L-shaped partition plate (3); the LED infrared probe (8) is arranged in a resin trough of the LCD printer;

the motor (4) is connected with the rotary baffle plate (5) with the hole through a bearing; the controller (9) is respectively connected with the LED infrared transmitter, the LED infrared receiver and the motor (4) in a wired mode; the power supply (10) is respectively connected with the controller (9) and the motor (4) in sequence in a wired mode.

The motor (4) is a 12V motor (4), the LED infrared probe (8) is an LED infrared probe (8) with a working wave peak of 940nm, and the controller (9) is selected to be an STM32F 407;

the invention is described in detail with reference to the accompanying drawings, and is an intelligent feeding method applied to an LCD printer, comprising the following steps:

step 1: the controller (9) controls the LED emitter to emit infrared signals every 3 minutes, and when the liquid level of liquid resin in the LCD resin trough is reduced to 3mm, the controller (9) receives the infrared signals through the LED receiver;

step 2: the controller (9) outputs a forward rotation driving signal of the motor (4), controls the motor (4) to drive the perforated rotating baffle (5) to rotate forwards for 45 degrees, and then the hole of the perforated rotating baffle (5) is superposed with the hole arranged at the middle position of the L-shaped partition plate (3), and the liquid resin in the bottle body (2) sequentially passes through the hole arranged at the middle position of the L-shaped partition plate (3) and the hole of the perforated rotating baffle (5) and flows out of the guide pipe (6);

and step 3: submerging the LED receiver again when the liquid level of liquid resin in the LCD resin trough rises to enable the LED receiver to stop receiving infrared signals, outputting a reverse rotation driving signal by the motor (4) through the controller (9), controlling the motor (4) to drive the perforated rotating baffle (5) to rotate reversely for 45 degrees, separating the hole of the perforated rotating baffle (5) from the hole formed in the middle of the L-shaped partition plate (3), and stopping the liquid resin in the bottle body (2) from flowing out to the LCD resin trough.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the invention relates may modify, supplement or substitute the specific embodiments described, without however departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. An intelligent feeding method device of an LCD printer comprises the following steps:

2. An intelligent feeding device of an LCD printer applied to the intelligent feeding method of the LCD printer according to claim 1, comprising:

the device comprises an upper cover, a bottle body, an L-shaped partition plate, a motor, a rotary baffle plate with holes, a guide pipe, a detection arm, an LED infrared probe, a controller, a power supply and a bottom plate with a sucker; the LED infrared probe consists of an LED infrared transmitter and an LED infrared receiver;