阅读说明：本技术 Sla三维打印工件的树脂回收及表面清洁方法和系统 (Resin recycling and surface cleaning method and system for SLA three-dimensional printing workpiece ) 是由 齐攀峰 于 2020-09-15 设计创作，主要内容包括：本发明提供了一种SLA三维打印工件的树脂回收及表面清洁方法和系统,包括：步骤1：通过风吹工艺去除工件表面残留树脂,并通过回收池对残留树脂进行回收；步骤2：采用喷淋工艺进一步清洁工件表面残留的树脂；步骤3：通过自动化的物料输送平台进行上下料、树脂回收和清洁。本发明通过采用风吹-喷淋的组合工艺方法,解决了SLA打印树脂件表面清洗难、自动化程度底的问题,同时可以回收以前大量浪费的残留树脂,提高物料利用率,并提高了清洗液的利用率。(The invention provides a resin recycling and surface cleaning method and a system for an SLA three-dimensional printing workpiece, which comprises the following steps: step 1: removing residual resin on the surface of the workpiece through a wind blowing process, and recovering the residual resin through a recovery tank; step 2: further cleaning the residual resin on the surface of the workpiece by adopting a spraying process; and step 3: go on unloading, resin recovery and cleanness through automatic material conveying platform. By adopting the combined process method of blowing and spraying, the invention solves the problems of difficult surface cleaning and low automation degree of the SLA printing resin piece, and simultaneously can recycle a great amount of wasted residual resin in the past, improve the utilization rate of materials and improve the utilization rate of cleaning solution.)

1. A resin recycling and surface cleaning method for an SLA three-dimensional printing workpiece is characterized by comprising the following steps:

step 1: removing residual resin on the surface of the workpiece through a wind blowing process, and recovering the residual resin through a recovery tank;

step 2: further cleaning the residual resin on the surface of the workpiece by adopting a spraying process;

and step 3: go on unloading, resin recovery and cleanness through automatic material conveying platform.

2. The resin recycling and surface cleaning method for SLA three-dimensional printing workpieces according to claim 1, wherein the air blowing process comprises: blowing 5 cycles by adopting a preset small air quantity, and then blowing 5 cycles by adopting a preset large air quantity;

the spraying process comprises the following steps: spraying for 10 seconds in a preset intermittent spraying mode, meanwhile, enabling the workpiece to move repeatedly, and then washing for 30 seconds in a preset spraying mode.

3. The resin recycling and surface cleaning method for SLA three-dimensional printing workpieces according to claim 1, wherein the air blowing process comprises: adopting a preset large air volume mode, adjusting the distance between a blowing port and the workpiece to be 150mm, and blowing for 10 cycles;

the spraying process comprises the following steps: spraying for 5 seconds in a preset continuous spraying mode, enabling the workpiece to move repeatedly, and then washing for 20 seconds in a preset spraying mode.

4. The method for resin recovery and surface cleaning of an SLA three-dimensional printing workpiece according to claim 2 or 3, wherein the air volume is controlled by the frequency of a variable frequency fan, the cycle times are controlled by the forward and reverse rotation of a stepping motor of a linear module, and the interval time is controlled by a timer.

5. The method for resin recovery and surface cleaning of an SLA three-dimensional printed workpiece, according to claim 4, is characterized in that the air volume, the circulation times and the interval time are set in combination according to the characteristics of the workpiece.

6. A resin recycling and surface cleaning system for SLA three-dimensional printed workpieces, comprising:

module M1: removing residual resin on the surface of the workpiece through a wind blowing process, and recovering the residual resin through a recovery tank;

module M2: further cleaning the residual resin on the surface of the workpiece by adopting a spraying process;

module M3: go on unloading, resin recovery and cleanness through automatic material conveying platform.

7. The resin recycling and surface cleaning system for SLA three-dimensional printing workpieces according to claim 6, wherein the air blowing process comprises: blowing 5 cycles by adopting a preset small air quantity, and then blowing 5 cycles by adopting a preset large air quantity;

the spraying process comprises the following steps: spraying for 10 seconds in a preset intermittent spraying mode, meanwhile, enabling the workpiece to move repeatedly, and then washing for 30 seconds in a preset spraying mode.

8. The resin recycling and surface cleaning system for SLA three-dimensional printing workpieces according to claim 6, wherein the air blowing process comprises: adopting a preset large air volume mode, adjusting the distance between a blowing port and the workpiece to be 150mm, and blowing for 10 cycles;

the spraying process comprises the following steps: spraying for 5 seconds in a preset continuous spraying mode, enabling the workpiece to move repeatedly, and then washing for 20 seconds in a preset spraying mode.

9. The system for resin recovery and surface cleaning of SLA three-dimensional printing workpieces as set forth in claim 7 or 8, wherein the air volume is controlled by the frequency of the variable frequency fan, the cycle number is controlled by the forward and reverse rotation of the stepping motor of the linear module, and the interval time is controlled by the timer.

10. The system for resin recovery and surface cleaning of SLA three-dimensional printing workpieces as set forth in claim 9, wherein the air volume, the number of cycles and the interval time are set in combination according to the characteristics of the workpieces themselves.

Technical Field

The invention relates to the technical field of resin cleaning and recycling, in particular to a resin recycling and surface cleaning method and system for an SLA three-dimensional printing workpiece.

Background

The 3D printing technology has the advantages of high manufacturing speed, low cost, capability of manufacturing complex parts and capability of eliminating defects in advance. Because the printed workpiece has a complex structure and various forms, the cleaning of the surface of the workpiece is particularly difficult in the post-processing stage, and the conventional ultrasonic equipment and alcohol cleaning scheme is adopted in the industry at present. The automatic degree of the scheme is low, and workers often stand beside the ultrasonic pool and participate in the ultrasonic pool manually, so that the safety risk is high, and the injury to human bodies is serious. In addition, the surface of the workpiece is provided with a large amount of residual resin before cleaning, and the problems of low efficiency for a long time, serious pollution of cleaning liquid, unsatisfactory effect and the like can be caused if the pretreatment is not added through simple placement or direct cleaning.

At present, the 3D printing industry mostly adopts a conventional ultrasonic cleaning machine and combines alcohol for use, so that the safety risk is high and the environmental protection pressure is high. Meanwhile, the method is limited by conditions, a corresponding resin recovery scheme is not provided, resin residues are large before workpieces are cleaned, not only is material waste, but also serious pollution is caused to subsequent cleaning liquid, and the waste of the cleaning liquid increases the pressure of environmental pollution. The invention adopts the blowing scheme to recover the resin, can clean the surface of the workpiece, starts from various aspects such as environmental protection, materials, cleaning and the like, and has obvious improvement.

Patent document CN206201479U (application number: 201621213580.3) discloses a photocuring three-dimensional printing production system, which includes a conveying rail and a conveying mechanism reciprocating along the conveying rail; the photocuring three-dimensional printing devices are distributed along the side surface of the conveying track; the standby printing platform holding area and the resin recovery area are arranged corresponding to each photocuring three-dimensional printing device; the cleaning area is arranged at one end of the carrying track; the control system is in signal connection with the carrying mechanism and all the photocuring three-dimensional printing devices; the conveying mechanism completes the following actions under the control of the control system: taking a printing platform with a workpiece in the printed photocuring three-dimensional printing device and transferring the printing platform into a resin recovery area; placing the standby printing platform in the standby printing platform containing area into the photocuring three-dimensional printing device; and (5) conveying the printing platform after the resin is recovered to a cleaning area.

Disclosure of Invention

In view of the defects in the prior art, the invention aims to provide a resin recycling and surface cleaning method and system for SLA three-dimensional printing workpieces.

The resin recycling and surface cleaning method for the SLA three-dimensional printing workpiece provided by the invention comprises the following steps:

step 1: removing residual resin on the surface of the workpiece through a wind blowing process, and recovering the residual resin through a recovery tank;

step 2: further cleaning the residual resin on the surface of the workpiece by adopting a spraying process;

and step 3: go on unloading, resin recovery and cleanness through automatic material conveying platform.

Preferably, the air blowing process comprises: blowing 5 cycles by adopting a preset small air quantity, and then blowing 5 cycles by adopting a preset large air quantity;

the spraying process comprises the following steps: spraying for 10 seconds in a preset intermittent spraying mode, meanwhile, enabling the workpiece to move repeatedly, and then washing for 30 seconds in a preset spraying mode.

Preferably, the air blowing process comprises: adopting a preset large air volume mode, adjusting the distance between a blowing port and the workpiece to be 150mm, and blowing for 10 cycles;

the spraying process comprises the following steps: spraying for 5 seconds in a preset continuous spraying mode, enabling the workpiece to move repeatedly, and then washing for 20 seconds in a preset spraying mode.

Preferably, the air quantity is controlled through the frequency of the variable-frequency fan, the cycle times are controlled through the forward and reverse rotation of the stepping motor of the linear module, and the interval time is controlled through a timer.

Preferably, according to the characteristics of the workpiece, the air volume, the circulation times and the interval time are set in a combined mode.

The resin recycling and surface cleaning system for the SLA three-dimensional printing workpiece provided by the invention comprises:

module M1: removing residual resin on the surface of the workpiece through a wind blowing process, and recovering the residual resin through a recovery tank;

module M2: further cleaning the residual resin on the surface of the workpiece by adopting a spraying process;

module M3: go on unloading, resin recovery and cleanness through automatic material conveying platform.

Preferably, the air blowing process comprises: blowing 5 cycles by adopting a preset small air quantity, and then blowing 5 cycles by adopting a preset large air quantity;

the spraying process comprises the following steps: spraying for 10 seconds in a preset intermittent spraying mode, meanwhile, enabling the workpiece to move repeatedly, and then washing for 30 seconds in a preset spraying mode.

Preferably, the air blowing process comprises: adopting a preset large air volume mode, adjusting the distance between a blowing port and the workpiece to be 150mm, and blowing for 10 cycles;

the spraying process comprises the following steps: spraying for 5 seconds in a preset continuous spraying mode, enabling the workpiece to move repeatedly, and then washing for 20 seconds in a preset spraying mode.

Preferably, the air quantity is controlled through the frequency of the variable-frequency fan, the cycle times are controlled through the forward and reverse rotation of the stepping motor of the linear module, and the interval time is controlled through a timer.

Preferably, according to the characteristics of the workpiece, the air volume, the circulation times and the interval time are set in a combined mode.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, by adopting a wind blowing process method and combining an automatic driving technology, the problems that the amount of residual resin on the surface of an SLA printing resin piece is large, the waste is large, the resin piece cannot be recycled, and the automation degree is low are solved; in addition, by combining with a spraying process, 95% of resin on the surface of the workpiece can be cleaned;

2. according to the invention, by adopting a combined process of blowing and spraying and combining an automatic driving technology, the problems of difficulty in cleaning the complex surface of the SLA printed resin piece, low automation degree and large waste of resin and cleaning liquid are solved;

3. the method has high automation degree, simultaneously pays attention to safety and environmental protection, is suitable for popularization and application of SLA three-dimensional printing automatic factory construction, and has wide industrial application prospect.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a flow chart of the operation of an SLA three-dimensional printed matter resin recycling and surface cleaning device of the invention;

FIG. 2 is a schematic diagram of the operation of the resin recycling and surface cleaning apparatus for SLA three-dimensional prints according to the present invention;

FIG. 3 is a simplified schematic diagram of an SLA three-dimensional print resin recycling and surface cleaning apparatus of the present invention.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.

Example 1:

according to the preparation method of the SLA three-dimensional printed matter resin recycling and surface cleaning equipment provided by the invention, the preparation flow is shown in figure 1 and comprises the following steps:

step 1: and putting the workpieces printed by the SLA equipment into the cleaning equipment in a whole or in a dispersed manner.

Step 2: and selecting a scheme that the height of the workpiece is more than 300, and after the equipment is started, the horizontal feeding mechanism can automatically convey the workpiece to the air blowing station.

And step 3: according to the blowing strategy, according to the characteristics of the workpiece, 5 cycles of blowing with small air volume are adopted, and 5 cycles of blowing with large air volume are adopted, so that 80% of residual resin can be cleaned.

And 4, step 4: sending the workpiece to a spraying station, spraying for 10 seconds in an intermittent spraying mode, and enabling the workpiece to move repeatedly; and then the spraying mode is adopted to wash for 30 seconds, so that 95% of residual resin on the surface of the workpiece can be removed.

And 5: after cleaning, the workpiece is transported to an exit location.

By adopting the method of the comparative example, the workpieces are fully cleaned and the cleanliness can meet the SLA process requirement.

And (4) performing combined setting on the cycle times, the interval time and the wind volume through software.

The result of the validation is not a fixed single pattern based on the material and workpiece characteristics.

The air quantity is controlled by the frequency of the variable-frequency fan, the cycle times are controlled by the positive and negative rotation of the stepping motor of the linear module, the interval time is realized by a plurality of timers, and the data are set by a unified software platform.

Example 2:

the preparation method of the SLA three-dimensional printed matter resin recycling and surface cleaning equipment provided by the invention comprises the following steps:

step 1: and putting the workpieces printed by the SLA equipment into the cleaning equipment in a whole or in a dispersed manner.

Step 2: and selecting a scheme of workpieces with the height of less than 100mm, and after the equipment is started, automatically conveying the workpieces to an air blowing station by the horizontal feeding mechanism.

And step 3: the blowing strategy adopts a large air volume mode according to the characteristics of a workpiece, automatically adjusts the distance between air blowing ports to 150mm, and repeatedly blows for 10 cycles, so that 80% of residual resin can be cleaned.

And 4, step 4: and (5) sending the workpiece to a spraying station, spraying for 5 seconds in a continuous spraying mode, and simultaneously enabling the workpiece to move repeatedly. And then the spraying mode is adopted, and the washing is carried out for 20 seconds, so that 95% of residual resin on the surface of the workpiece can be removed.

And 5: after the cleaning is completed, the sample is transported to the outlet.

By adopting the method of the comparative example, the workpieces are fully cleaned and the cleanliness can meet the SLA process requirement.

Example 3:

the principle of the preparation method based on the three-dimensional printed piece resin recovery and surface cleaning equipment is shown in figure 2, and the preparation method specifically comprises the following steps: the equipment consists of three modules, which are respectively:

motion control system and operating software: the system comprises a motion controller, a touch screen integrated industrial personal computer, a PLC (programmable logic controller), a frequency converter, customized and developed process control software and the like;

cleaning, recovering and moving module: the device consists of a wind blowing process, a spraying process, a recovery tank and a movement module;

safety alarm and environmental monitoring system: the device consists of an atmosphere concentration detection and exhaust system and an alarm system; the equipment realizes the requirements of full-automatic control, modular design and safety and environmental protection.

Fig. 3 is a simple schematic diagram of an SLA three-dimensional printed matter resin recycling and surface cleaning device of the invention, which comprises the following functions:

A. conveying of the SLA printer screen plate is realized through a special lifting basket;

B. the horizontal reciprocating motion of the sample and the screen plate assembly is realized through the motion module;

C. the special air blowing pipeline and the air blowing nozzle combination scheme which is verified and tested can remove most of resin residues on the surface of the material, and the resin on the surface of the workpiece is recovered by combining the recovery tank, so that the resin waste and the pollution of cleaning liquid are reduced;

D. the special spray pipeline and the spray nozzle combination scheme which is verified and tested can further clean the resin on the surface of the workpiece which is not easy to clean;

E. the integrated environment detection sensor system and the exhaust system ensure that the equipment is safe and environment-friendly.

The logistics sequence through the components:

1. putting the workpiece into a lifting basket on the feeding mechanism;

2. the feeding mechanism moves horizontally to reach the position below the air blowing system;

3. completing blowing circulation according to a control scheme;

4. the spraying system moves forwards to adjust the station;

5 completing spraying circulation according to the control scheme;

6. the feeding mechanism conveys the workpiece to a feeding outlet, and the cleaning process is completed.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

Those skilled in the art will appreciate that, in addition to implementing the systems, apparatus, and various modules thereof provided by the present invention in purely computer readable program code, the same procedures can be implemented entirely by logically programming method steps such that the systems, apparatus, and various modules thereof are provided in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Therefore, the system, the device and the modules thereof provided by the present invention can be considered as a hardware component, and the modules included in the system, the device and the modules thereof for implementing various programs can also be considered as structures in the hardware component; modules for performing various functions may also be considered to be both software programs for performing the methods and structures within hardware components.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.