Stable extrusion control system of 3D printing equipment

Abstract

The utility model provides a stable extrusion control system of 3D printing equipment, which comprises a rack, a 3D printer, a 3D printer, a 3D printer and a 3D printer, the mixing and extruding mechanism is arranged on the rack and comprises an extruding assembly which can transversely move and is arranged in the containing cavity, the extruding assembly comprises a material mixing bin body, a mixing cavity is formed in the material mixing bin body, a stirring assembly is arranged in the mixing cavity, and an extruding head is connected to the lower portion of the material mixing bin body; a plurality of second weighing modules are arranged at the bottom of the mixing chamber, the second weighing modules Mi are in communication connection with the control unit, the second weighing modules are used for detecting the levelness of the extrusion assembly in the feeding and mixing process and outputting corresponding signals to the control unit, and the control unit is used for receiving the signals output by the second weighing modules. The levelness of the extrusion assembly can be detected in the feeding process and the mixing process, and the situation that due to the levelness problem, the forming and printing precision of 3D printing products is affected, and material waste is caused is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of 3D printing equipment stable extrusion control system, applied to 3D printing field. BACKGROUND

[0002] Pottery clay printer is a kind of 3D printer, is specially used for printing ceramic materials, such as pottery clay, porcelain clay, purple sand clay etc. It has a wide range of applications in the fields of ceramic production, artistic creation, education and scientific research.

[0003] The raw material ratio mixing and conveying pottery clay 3D printing device with application No. 202422359039.4, since the equipment combines the mixing bin with the extruder, the working efficiency of the printer can be effectively improved, but since stirring is carried out above the extruder, the influence of the mixing process on the levelness of the extruder needs to be considered. If the levelness of the extruder is not enough, it will affect the molding and printing precision of the 3D printed product. Therefore, in view of the above problems, the utility model designs a kind of 3D printing equipment stable extrusion control system. UTILITY MODEL CONTENTS

[0004] The utility model provides a kind of 3D printing equipment stable extrusion control system, can effectively solve the above problems.

[0005] The utility model is realized as follows:

[0006] A kind of 3D printing equipment stable extrusion control system, comprising:

[0007] Frame, including printing chamber;

[0008] Mixed extrusion mechanism is set on the frame, the mixed extrusion mechanism includes the extrusion assembly that can be transversely moved and is arranged in accommodating chamber, the extrusion assembly includes mixing bin, the mixing bin is built-in with mixing chamber, the mixing chamber is provided with stirring assembly, the mixing bin is connected with extrusion head below, the mixing chamber bottom is provided with a plurality of second weighing modules, the second weighing module M i With control unit communication connection, a plurality of the second weighing modules are used to detect the levelness of the extrusion assembly in the feeding and mixing process, and output corresponding signal to control unit, the control unit is used to receive the signal output by second weighing module.

[0009] As a further improvement, define the weight detected by the second weighing module as M i Wherein, i is the second weighing module serial number, in the feeding process, one of the second weighing modules is taken as a reference, and the weight detected by other second weighing modules does not exceed the first threshold value A of the weight detected by the second weighing module. If so, continue feeding, otherwise, feedback signal to control unit.

[0010] As a further improvement, the detection weight of the second weighing module taken as a reference is M1, and the first threshold value A is M1±(5~8)%M1.

[0011] As a further improvement, in the mixing process, the detection weight of the other second weighing modules does not exceed the second threshold value B of the detection weight of the second weighing module taken as a reference, and the mixing is continuously carried out, otherwise a feedback signal is fed back to the control unit.

[0012] As a further improvement, the detection weight of the second weighing module taken as a reference is M1, and the second threshold value B is M1±(1~2)%M1.

[0013] As a further improvement, the second weighing module is 3, and the second weighing modules are equidistantly arranged in a circumferential array below the mixing bin body.

[0014] As a further improvement, the rack further comprises a containing chamber arranged above the printing chamber, and a raw material conveying mechanism is arranged in the containing chamber, and the raw material conveying mechanism is used for feeding the mixed extrusion mechanism.

[0015] As a further improvement, the rack further comprises a printing platform arranged in the printing chamber, and the printing platform is used for carrying the 3D printing product.

[0016] The beneficial effects of the utility model are as follows: through the second weighing modules arranged at the bottom of the mixing chamber, the second weighing module M1 is in communication connection with the control unit, the second weighing modules are used for detecting the levelness of the extrusion assembly in the feeding and mixing processes, and corresponding signals are output to the control unit, the control unit is used for receiving the signals output by the second weighing module, the second weighing module of the utility model can not only measure the levelness of the extrusion assembly in the feeding and mixing processes, but also prevent the levelness problem from affecting the forming and printing precision of the 3D printing product and causing the waste of materials. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of the drawings.

[0018] Figure 1 It is the whole machine structure schematic diagram provided by the utility model embodiment.

[0019] Figure 2is a schematic view of the structure of the raw material conveying mechanism provided by the embodiment of the utility model.

[0020] Figure 3 is a schematic view of the structure of the mixed extrusion mechanism provided by the embodiment of the utility model.

[0021] Figure 4 is a schematic view of the cross section structure of the mixed extrusion mechanism provided by the embodiment of the utility model.

[0022] Figure 5 is a schematic view of the process of the automatic detection of the blockage feedback system of the pipeline of the 3D printing equipment provided by the embodiment of the utility model.

[0023] Figure 6 is a schematic view of the process of the control system of the quantitative conveying no material feedback provided by the embodiment of the utility model.

[0024] Figure 7 is a schematic view of the process of the control system of the stable extrusion of the 3D printing equipment provided by the embodiment of the utility model.

[0025] The attached drawings are as follows:

[0026] 10, rack; 11, containing chamber; 12, printing chamber;

[0027] 20, raw material conveying mechanism; 21, conveying assembly; 211, raw material bin body; 212, first feeding bin body; 213, first spiral auger; 214, second feeding bin body; 22, first material sensor; 23, first weighing module;

[0028] 30, mixed extrusion mechanism; 31, extrusion assembly; 311, mixing bin body; 312, pipeline; 313, stirring assembly; 314, extrusion head; 32, second weighing module; 33, second material sensor;

[0029] 40, printing platform;

[0030] 50, control unit. Specific implementation

[0031] In order to make the purposes, technical schemes and advantages of the embodiments of the present application clearer, the technical schemes of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only to represent selected embodiments of the present application.

[0032] In the description of the present application, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified.

[0033] Referring to Figure 1 As shown in the figure, a kind of clay 3D printing device, including rack 10, the rack 10 inside including accommodating chamber 11 and printing chamber 12, the accommodating chamber 11 inside is provided with raw material conveying mechanism 20.

[0034] Referring to Figure 2 As shown in the figure, the raw material conveying mechanism 20 includes several conveying assemblies 21 arranged on the rack 10, in the present embodiment, the conveying assembly 21 is 2, the conveying assembly 21 includes raw material bin body 211, the first feeding bin body 212 is connected below the raw material bin body 211, the first feeding bin body 212 is provided with first spiral auger 213 for material stirring and conveying, the second feeding bin body 214 is connected below the first feeding bin body 212, and the second feeding bin body 214 is connected with mixing extrusion mechanism 30.

[0035] Referring to Figure 3 As shown in the figure, the mixing extrusion mechanism 30 includes extrusion assembly 31 movably arranged in the accommodating chamber 11 and communicated with the conveying assembly 21, the extrusion assembly 31 includes mixing bin body 311, the mixing bin body 311 is provided with mixing chamber, the mixing chamber is communicated with the conveying assembly 21 by pipeline 312, the mixing chamber is provided with stirring assembly 313, the extrusion head 314 is connected below the mixing bin body 311, and the extrusion head 314 is used for extruding material for printing.

[0036] A printing platform 40 is longitudinally slidably arranged in the printing chamber 12 for carrying a 3D printed product.

[0037] The utility model discloses a plurality of conveying assemblies 21 arranged above the rack 10 can effectively convey different raw materials to the mixed extrusion mechanism 30, first mixing and stirring in the mixing and stirring mechanism and then extruding through the extrusion assembly 31, and printing the 3D printing material into a preset shape, and the utility model directly prints the raw materials after mixing, which can greatly improve the efficiency.

[0038] The utility model further includes a control unit 50, and a first material sensor 22 arranged in the raw material bin body 211 and in communication connection with the control unit 50, the first material sensor 22 is the equipment for detecting material state, it can detect the position, quantity, weight, temperature of material and the like parameter, and these parameters are converted into electric signal and sent to the control unit 50. i The first weighing module 23 is in communication connection with the control unit 50, in this embodiment, the first weighing module 23 is 2, the detection weight of the first weighing module 23 is m1, m2 respectively, the first weighing module 23 is used for detecting the weight of material in the second feeding bin body 214, and the working principle of the weighing module is based on piezoresistive effect. When the force of the measured object is applied to the elastomer in the downward direction, the elastomer will produce deformation, and the deformation produces strain, and the strain is monitored by the piezoresistive resistance, and the utility model adopts the cantilever beam type weighing sensor, when the second feeding bin body 214 is placed at the free end of the cantilever beam, the gravity of the object will cause the cantilever beam to produce slight bending deformation. This deformation will cause the strain gauge to produce strain, and the resistance value of the strain gauge will change. The change of this resistance value will be converted into an electric signal, and an electric signal proportional to the weight of the object is output after signal processing part processing.

[0039] Further include a plurality of second weighing modules 32 arranged at the bottom of the mixing bin body 311, and the detection weight of the second weighing module 32 is M iThe second weighing module 32 is in communication connection with the control unit 50. In the embodiment, the second weighing module 32 is three, and the corresponding weighing displays of the three second weighing modules 32 are M1, M2 and M3 respectively. The three second weighing modules 32 are arranged in equidistant circumferential array under the mixing bin body 311. The second weighing module 32 can not only measure the weight of the material in the mixing bin body 311, but also detect the levelness of the mixing bin body 311. The extrusion head 314 is provided with a second material sensor 33, which is in communication connection with the control unit 50. The second material sensor 33 is used to detect the position, quantity, weight and other parameters of the material at the extrusion head 314.

[0040] With reference to Figure 5As shown, since the ceramic mud material may have the phenomenon of solidification, the overall material flow needs to be monitored during the printing process to prevent the problem of equipment blockage caused by material solidification during use. In view of the above problems, the utility model provides a kind of 3D printing equipment pipeline automatic detection blockage feedback system, since the structure mainly blocked in the ceramic mud 3D printing device is raw material bin 211, first feeding bin 212, second feeding bin 214, mixed extrusion mechanism 30 and the communication pipeline 312 between mixed extrusion mechanism 30 and second feeding bin 214, the system detects the above-mentioned part of material blockage and feedback by first material sensor 22, first weighing module 23, second weighing module 32, second material sensor 33, the working principle of the system is as follows: when the value of first material sensor 22 is not fluctuated, it indicates that raw material bin 211 is blocked, at this time, the warning light at this place is alarmed to remind;When first material sensor 22 fluctuates, the value of material sensor obviously decreases and then appears stable trend, and the value of first weighing module 23 obviously decreases, indicating that first feeding bin 212 is blocked, the warning light at this place is alarmed to remind;When the material sensor appears obvious decrease and then appears stable trend, and the value of first weighing module 23 appears unchanging trend, it indicates that second feeding bin 214 is blocked, the warning light at this place is alarmed to remind;When the value of first weighing module 23 presents decreasing trend, second weighing module 32 (the value here is the average value of second weighing module 32) does not obviously change, then the value of second material sensor 33 is judged, if the value of second material sensor 33 does not change, it indicates that extruder is blocked, then the warning light at this place is alarmed to remind;If the value of the second material sensor 33 changes, it indicates that the communication pipeline 312 between the mixing extrusion mechanism 30 and the second feeding bin body 214 is blocked, and the warning light at this position will alarm. Through the above method, the root cause of the material blockage can be accurately judged and investigated, which can not only effectively improve the processing efficiency of the abnormality, but also can reduce the cost by accurately detecting as much as possible without using sensors. In the embodiment, the first material sensor 22 and the second material sensor 33 are proximity sensing modules or liquid level sensors, and the first weighing module 23 and the second weighing module 32 use cantilever beam type weighing sensors, which have higher accuracy. Therefore, the cantilever beam type weighing sensor arranged below the second feeding bin body 214 and the mixing bin body 311 can not only accurately detect the weight of the mixed material, but also detect the blockage of the material. The reason for arranging the material sensor on the raw material bin body 211 and the extruder is that the material sensor can detect the position, quantity, weight and other parameters of the material, but its accuracy is not high, and its cost is relatively low. Therefore, arranging the material sensor on the raw material bin body 211 and the extruder head 314 can not only detect the blockage of the material in cooperation with the weighing sensor, but also effectively reduce the cost.

[0041] Referring to Figure 6As shown, the prior art by setting material sensor on the raw material bin 211, through the material sensor for raw material bin 211 no material detection, namely when the material reaches a certain threshold, prompting the whole machine to add material, but the clay 3D printing equipment and traditional stirring equipment, clay 3D printing equipment for the use of material is more accurate, through the material sensor can know the material remaining in the raw material bin 211, but cannot know the material remaining in the raw material conveying mechanism 20, if the use of material is not accurate, blindly add material, then in printing a piece of goods, need to print the next piece of goods, may cause the material in the bin solidification caused by the blockage, or difficult to clean problem, therefore, the utility model designs a kind of quantitative delivery no material feedback control system, it detects the material remaining in the raw material bin 211 by first material sensor 22, when first material sensor 22 detects the weight of material in raw material bin 211 is less than third threshold C, then alarm warning, the material remaining in second feeding bin 214 is monitored by first weighing module 23, when first weighing module 23 monitors the weight of material in second feeding bin 214 is less than fourth threshold D, then alarm warning again, when first weighing module 23 monitors the weight of material in second feeding bin 214 is less than fifth threshold E, then alarm stop, define the capacity of the raw material bin 211 as L1, the third threshold C=15~20%*L1, define the capacity of the second feeding bin 214 as L2, fourth threshold D=8~10%*L2, fifth threshold E=3~5%*L2, in one embodiment, the third threshold C=16%*L2, fourth threshold D=8%*L2, fifth threshold E=4%*L2, the advantage of such setting is that when the material sensor senses the third threshold C, the material needed for the remaining printing product can be prepared, but no material can be added at this time, until the second feeding bin 214 starts to issue a warning, at this time, the material can be added more accurately, to prevent the remaining material in the second feeding bin 214 from solidifying due to too much material preparation after printing the product, causing blockage or difficulty in cleaning, when first weighing module 23 detects that the material is less than fifth threshold E, the equipment automatically alarms and stops, the advantage of such setting is that if the staff forgets to add material, the equipment will automatically stop, and after adding the material, the equipment can be started and the previous printing step can be continued for 3D product printing, if there is no material, the 3D printer can only continue the program setting step for printing, when the material supply is restored, it cannot backtrack to the printing step when the material is broken, at this time, it can only be scrapped, increasing material loss and waste of printing time, therefore, through the method, the foolproofing is effective to prevent resource waste.

[0042] Reference Figure 7As shown, in order to detect the levelness of the mixed extrusion mechanism 30, the utility model provides a kind of control system for the stable extrusion of 3D printing equipment, including the second weighing module 32 of one of the present scheme as reference, the detection weight of the second weighing module 32 as reference is M1, during the feeding process, when the value shown by other second weighing module 32 exceeds first threshold value A, then display alarm warning state, during the mixing process, when the value shown by other second weighing module 32 exceeds second threshold value B, then display alarm warning state, the first threshold value A=M1±(5~8)%M1, the second threshold value B=M1±(1~2)%M1, in the embodiment, the first threshold value A=M1±5%M1, that is, during the feeding process, when M1+5%M1>M2>M1-5%M1, M1+5%M1>M3>M1-5%M1, then it indicates that mixing bin body 311 is in horizontal state, if the weight of M2, M3 exceeds this range, then it indicates that mixing bin body 311 is not in horizontal state, at this time, alarm warning is carried out, during the feeding process, since material is not mixed fully, and the number of material in the embodiment is 2, plus water for mixing and stirring, since the weight between material and is different, but mixing bin body 311 is provided in conical shape, material concentrates into bottom with conical structure, although there are numerous uncertainties during the feeding process, but the range of second weighing module 32 will not be too large error, therefore, the first threshold value A is set to M1±(5~8)%M1;In the embodiment, second threshold value B=M1±2%M1, that is, during the mixing process, when M1+2%M1>M2>M1-2%M1, M1+2%M1>M3>M1-2%M1, since material has been initially mixed during the mixing process, therefore, the range of second threshold value B is smaller, since it is necessary to improve work efficiency, usually, mixing starts when feeding, therefore, in the embodiment, mixing process is 5 minutes after feeding and stirring, by the setting between first threshold value A and second threshold value B, the levelness of mixing bin body 311 can be judged, since the equipment combines mixing bin body 311 with extruder, therefore, it is necessary to consider the influence of mixing process on the levelness of extruder, if the levelness of extruder is not enough, then it will affect the forming and printing precision of 3D printing product, the utility model can detect the levelness of mixing bin body 311 by the 3 second weighing modules 32 arranged at the bottom of mixing bin body 311 during the feeding and mixing process, prevent that the lack of levelness of extruder leads to manufacturing defective product, cause material and time waste.

[0043] The above only describes preferred embodiments of the utility model, and is not used to limit the utility model, for the person skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A stable extrusion control system for a 3D printing equipment, characterized in that, include: The rack (10) includes a receiving chamber (11) and a printing chamber (12); The mixing extrusion mechanism (30) is mounted on the frame (10). The mixing extrusion mechanism (30) includes an extrusion assembly (31) that can be laterally moved within the accommodating chamber (11). The extrusion assembly (31) includes a mixing chamber (311). An extrusion head (314) is connected below the mixing chamber (311). Several second weighing modules (32) are provided at the bottom of the mixing chamber (311). The second weighing modules (32) are communicatively connected to the control unit (50). The several second weighing modules (32) are used to detect the levelness of the extrusion assembly (31) during feeding and mixing, and output corresponding signals to the control unit (50). The control unit (50) is used to receive the signals output by the second weighing modules (32).

2. The stable extrusion control system for a 3D printing equipment according to claim 1, characterized in that, The weight detected by the second weighing module (32) is defined as M. i , where i is the serial number of the second weighing module (32). During the feeding process, one of the second weighing modules (32) is used as a reference. If the weight detected by other second weighing modules (32) does not exceed the first threshold A of the weight detected by the second weighing module (32), the feeding continues; otherwise, a feedback signal is sent to the control unit (50).

3. The stable extrusion control system for a 3D printing equipment according to claim 2, characterized in that, The weight detected by the second weighing module (32) as a reference is M1, and the first threshold A = M1 ± (5~8)%M1.

4. A stable extrusion control system for a 3D printing equipment according to claim 2, characterized in that, During the mixing process, if the weight detected by one of the second weighing modules (32) does not exceed the second threshold B of the weight detected by the other second weighing modules (32), the mixing continues; otherwise, a feedback signal is sent to the control unit (50).

5. A stable extrusion control system for a 3D printing equipment according to claim 4, characterized in that, The weight detected by the second weighing module (32) as a reference is M1, and the second threshold B = M1 ± (1~2)%M1.

6. A stable extrusion control system for a 3D printing equipment according to claim 1, characterized in that, There are three second weighing modules (32), which are arranged in an equidistant circular array below the mixing silo (311).

7. A stable extrusion control system for a 3D printing equipment according to claim 1, characterized in that, The frame (10) further includes a raw material conveying mechanism (20) disposed in the accommodating chamber (11), the raw material conveying mechanism (20) being used to feed material to the mixing extrusion mechanism (30).

8. A stable extrusion control system for a 3D printing equipment according to claim 1, characterized in that, The frame further includes a printing platform disposed within the printing chamber, the printing platform being used to support 3D printed products.

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