CN102363354A - Mechanical-vision-based injection molding machine mold protecting system and method - Google Patents
Mechanical-vision-based injection molding machine mold protecting system and method Download PDFInfo
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- CN102363354A CN102363354A CN2011103412423A CN201110341242A CN102363354A CN 102363354 A CN102363354 A CN 102363354A CN 2011103412423 A CN2011103412423 A CN 2011103412423A CN 201110341242 A CN201110341242 A CN 201110341242A CN 102363354 A CN102363354 A CN 102363354A
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Abstract
The invention relates to a mechanical-vision-based injection molding machine mold protecting system, which comprises a master control board using an embedded chip, a camera, a near infrared light source and a magnetic fixed seat, wherein the master control board is connected with an injection molding machine through an input/output (I/O) signal interface and connected with the camera through the camera interface; the camera and the near infrared light source are arranged on the magnetic fixed seat; and the magnetic fixed seat is arranged around the injection molding machine, so that the camera can acquire an image in the mold after the injection molding machine mold is opened under the near infrared light source. The invention also relates to a mechanical-vision-based injection molding machine mold protecting method, which comprises the following steps of: judging whether a product is qualified by using the camera, shooting the mold again after blanking, judging whether the blanking is successful, and giving a detection result signal. The blanking condition is judged directly through the mold image acquired by the camera, and the un-falling residual product in the mold is intelligently analyzed, so that the method is quite reliable and the mold is safer.
Description
Technical field
The present invention relates to injection machine mould resist technology field, particularly relate to a kind of injection machine mould protecting and method based on computer vision.
Background technology
The most plastic products in the world today are injection mo(u)ldings, and the tool of production of injecting products then is injection machine and mould.The model of injection machine has only determined to produce the size of product, really influences product appearance and shape, then is injection mold.One overlaps in the complete injection-moulding device, though the shared volume of mould is very little, price but is very expensive.
Nowadays the most of injection machines on the market do not carry out safety detection and protection to mould when the production of plastic product.In full-automatic injection moulding process,, after product drops the tenth skill of a complete injection moulding process normally with after injection completion, the moulds open, carry out action of injection next time.But in this process, after the moulds open, do not drop from mould like fruit product, this moment, injection machine thought that mould has dropped and carries out mould assembling action next time; Then mould might be damaged by pressure by external force very much, produces breakage, distortion; Lack the limit even take out situation such as bar fracture, in case above-mentioned situation occurs, entire die possibly just scrapped; Also need the very long time even can repair, cause damp production, thereby manufacturing enterprise is caused the loss of great number.Therefore the just increasing concern that receives manufacturing enterprise of method of mould protection.
Carry out the blanking detection to producing the product of accomplishing in the existing technology, use electric eye to judge whether that product drops automatically after completion, thereby think whether mould inner wall is clean, whether decision carries out the production cycle of product next time.But because product not is a regular object when dropping, its process that drops might can't trigger the detection signal of electric eye, make injection machine think that product does not have and drop, thereby false alarm stops full-automatic injection moulding process, the production efficient of slowing down.Or some product drops but another part product does not drop, and drops and thinks that mould totally can carry out mould assembling action next time by mistake but electric eye has detected product, thereby cause the damage of mould.
Summary of the invention
Technical problem to be solved by this invention provides a kind of injection machine mould protecting and method based on computer vision, in order to the protection mould.
The technical solution adopted for the present invention to solve the technical problems is: a kind of injection machine mould protecting based on computer vision is provided; Comprise the master control borad, camera, near-infrared light source and the magnetic holder that adopt embedded chip; Said master control borad links to each other with injection machine through the I/O signaling interface, links to each other with said camera through camera interface; Said camera and near-infrared light source are installed on the magnetic holder; Said magnetic holder is arranged on around the said injection machine, the image in the mould after making camera under near-infrared light source, to collect injection moulding machine mould open; Said master control borad is used to receive the instruction of injection machine, sends instruction to injection machine, and the image of camera collection is analyzed and judged the blanking situation.
Have the filter that receives only infrared light on the said camera.
Said I/O signaling interface is that photoelectricity is isolated the I/O signal port.
Said magnetic holder is the support that the cylindrical clip of magnetic force band steering head is arranged.
The DSP6437 chip that embedded chip on the said master control borad produces for TI company.
The technical solution adopted for the present invention to solve the technical problems is: a kind of injection machine mold protecting method based on computer vision also is provided, may further comprise the steps:
(1) after the blanking release, injection machine informs that blanking finishes for I/O signal of mould protecting, requires mould protecting to whether safe blanking detects;
(2) after mould protecting receives that blanking detects the I/O signal, then take, and look like to compare with the empty die drawing that is stored in the protection system to working as front mold; Whether normally to detect blanking,, then notify injection machine to continue next injection cycle through the I/O signal like blanking; If detect unsafe blanking; Then, then notify injection machine to report to the police, stop action through the I/O signal.
Preceding further comprising the steps of in said step (1):
(A) before the demoulding began after injection moulding machine mould open finishes, injection machine carried out product quality inspection for I/O signal indicating of said mould protecting, and full-automatic pause in action;
(B) mould protecting is after receiving the I/O signal; Begin product is taken; And carry out the product quality situation and calculate, after the completion result of calculation is passed to injection machine through the I/O signal and inform that the quality of injecting products this time of injection machine is that non-defective unit still is poor article;
(C) after injection machine receives the I/O signal that is sent by mould protecting, the I/O signal being judged, is non-defective unit like fruit product, then by blanking screening washer or manipulator product is positioned over the non-defective unit storehouse, if be the difference article, then is positioned over difference article storehouse.
Beneficial effect
Owing to adopted above-mentioned technical scheme; The present invention compared with prior art; Have following advantage and good effect: the present invention directly gathers die drawing by camera and looks like to judge the blanking situation, and whether intellectual analysis goes out in the mould also residually to have product not drop, and it is more intelligent to detect electric eye with respect to existing blanking; More reliable, make mould safer.Under the situation of one-mold multiple-member, mould protection effect is more obvious, can not produce the situation that can't judge in the prior art that single product does not drop in certain fecund article mould.For producing the product of accomplishing; Can carry out product quality analysis by camera; If lack limit, overlap, situation such as inferior, imperfect, system will inform that it is substandard products that injection machine is this time produced product through the I/O interface, and injection machine can use actions such as manipulator or blanking screening that defect ware is isolated normal product; Simplify product greatly and detected step, improved production efficiency.
Description of drawings
Fig. 1 is a theory diagram of the present invention;
Fig. 2 is the elemental motion flow chart of injection machine in the prior art;
Fig. 3 is the injection machine action flow chart behind the adding mould protecting.
The specific embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in the restriction scope of the present invention.Should be understood that in addition those skilled in the art can do various changes or modification to the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment of the present invention relates to a kind of injection machine mould protecting based on computer vision, and is as shown in Figure 1, comprises a master control borad, optional mouse, touch-screen, display screen, near-infrared light source, filter, camera and magnetic holder.Said master control borad is provided with embedded chip, and is provided with a touch screen interface, display screen interface, camera interface, I/O signaling interface and mouse interface, and it is mainly in order to processing and analysis image and judge product quality and the blanking situation.The Leonardo da Vinci DSP6437 chip that embedded chip uses TI company to produce; Employing is up to the chip dominant frequency of 200MHz and dedicated video treatment channel efficiently; Has the high speed image disposal ability; And disposed memory chip up to 256M, make calling program can and high procedure quantity and rate request under carry out stable operation.Wherein, optional mouse is the mouse of PS2 interface, links to each other with master control borad through mouse interface.Touch-screen is a resistive touch screen, links to each other with master control borad through touch screen interface, and its touch area size is identical with display screen, makes mould protecting can carry out touch operation.Display screen is the color LCD screen of euchroic, and its resolution ratio is 800*600, can show 24 euchroic coloured silks, links to each other with master control borad through display screen interface, but makes the mould protecting full color show captured image and action.The adjustable brightness of near-infrared light source, filter receives only infrared light, can filter most visible light, cooperates with near-infrared light source, can reduce significantly in mould protection process, is changed and the interference of generation by extraneous light, improves protection stability.Filter is arranged on the camera, and camera is the camera of adjustable focal length, is connected with master control borad through camera interface.Camera and near-infrared light source all are installed on the magnetic holder; The magnetic holder is fixed on around the injection machine; The magnetic holder is the support that the cylindrical clip of magnetic force band steering head is arranged; Make camera and light source can be fixed in the injection machine diverse location, thereby make the image in the mould camera can collect injection moulding machine mould open under near-infrared light source after.But the magnetic force hand switch of magnetic holder is adsorbable on multiple different irony frame for movements such as plane or curved surface.The I/O signaling interface is that photoelectricity is isolated the I/O signaling interface, and protection system links to each other with injection machine through this I/O signaling interface, thereby realizes exchanges data with injection machine, avoids industry spot to disturb.This protection system can be judged end product quality and the blanking situation of plastics in mould, and the protection mould is avoided not carrying out next one action and mold damage under the blanking situation.
Be not difficult to find; This mould protecting has adopted the digitized image treatment technology; Detecting with product quality analysis and blanking is means, and its need are fixed a camera and an infrared light supply by the magnetic holder, and is arranged on the clear position around the injection machine mould; Because camera and light source are all very little, do not influence the running of whole injection machine and the production of product fully after therefore installing.After each production is accomplished; Mould protecting with the integrality of testing product and blanking after the security situation of mould; Inform then whether injection machine can carry out the production action of product next time, and can carry out good substandard products to product according to product quality and classify automatically.
As shown in Figure 2, injection machine elemental motion flow process comprises in the prior art: die sinking, seat stand advance, storing, injection, pressurize, seat stand move back, die sinking, thimble, blanking, prepare the injection moulding of product next time then.In this process; Most injection machines are the steps that do not have the mould protection; The part injection machine has adopted in the blanking stage and has placed electric eye, judges whether normal blanking, whether allows the carrying out of next mould action with I/O signaling interface notice injection machine; But say that from the production efficiency of plastic product several drawbacks are arranged in this process.
In the product injection mo(u)lding, after the die sinking, some factory adopts workman's naked eyes to judge whether the production product is qualified, when blanking, waits for then, and product is carried out excellent difference class.At first owing to people's fatigue, multiple factor such as repeat, the screening process efficient of this product quality is very low, and error rate is very high.A lot of producers have simply saved product quality this step of classification, go out defect ware by hand picking after in the end product gathers.
Secondly when blanking; Because blanking is irregular, electric eye is unstable, or even because the flaw of mould; Cause portioned product not fall down smoothly; Serious harm the security of mould, under the situation that also leaves product on the mould, produce the damage that causes mould probably once more, thereby cause serious loss.
Shown in Figure 3 is adds in the injection machine motion flow behind the mould protecting, has increased behind the good and bad classification of product, the blanking steps such as mold integral detection.Because the mould protector adopts the high-speed dsp chip, its image processing time only needs several milliseconds, can think the moment completion.Therefore the several steps that increases does not influence the production time.And in process of production; The die sinking signal passes to mould protecting with the I/O signal form, and mould protecting is analyzed in the quality of step 8 pair product then, and informs injection machine with the I/O signal; So when the product blanking; Molding machine will directly be classified to product, and good and bad article can separate automatically, improve the efficient of product later stage classification greatly.In step 11, behind the product blanking, injection machine informs with the I/O signal mould protecting need detect whether product drops fully in the mould.Mould protecting is taken mould after receiving the I/O signal, and the situation when analysing and comparing complete blanking provides testing result, informs injection machine with the I/O signal form.If current blanking is complete blanking, then injection machine stops, and produces to report to the police, and notifies the workman or produces the director and safeguard and adjust.Like normal blanking, then injection machine is prepared next mould production action, carries out next one circulation.
Use mould protecting, need carry out the mould learning motion when mounted, after mold injection product ordinary production, take a figure, behind normal blanking, take a figure then, after preserving automatically, self study is accomplished.Each mould of this kind study only need be learnt once, is accomplished by the professional, and data are kept in the master control borad, more can conveniently call behind the mold exchange later on, need not to learn again.
A kind of injection machine mold protecting method based on computer vision comprises the steps: complete injecting products is taken and learnt, with among picture information storage and the mould protecting; Before the demoulding began after injection moulding machine mould open finishes, injection machine can carry out product quality inspection for I/O signal indicating of mould protecting, and full-automatic pause in action; Mould protecting is after receiving the I/O signal; Begin product is taken; And carry out the product quality situation and calculate; After the completion result of calculation is passed to injection machine through the I/O signal and inform that the quality of injecting products this time of injection machine is that non-defective unit still is poor article, non-defective unit or difference article pass to injection machine by different I/O signal; Injection machine is judged the I/O signal after receiving the I/O signal that is sent by mould protecting, is non-defective unit like fruit product, then by blanking screening washer or manipulator product is positioned over the non-defective unit storehouse, differs from article then be positioned over to differ from the article storehouse if be; After the blanking release, injection machine informs that blanking finishes for once more I/O signal of mould protecting, requires mould protecting to whether safe blanking detects; After mould protecting receives that blanking detects the IO signal; Then take working as front mold, and compare with the image of empty mould, normally whether detection blanking; As blanking; Then continue next injection cycle,, stop action if detect unsafe blanking then report to the police through I/O signal notice injection machine through I/O signal notice injection machine.
After having increased mould protecting; Simplify the production product quality management, improved mould safety coefficient in process of production, can help enterprise; Especially use the enterprise of high-grade mould to save very big management and maintenance cost; Prevent that mould is damaged, increase the service life, improve production safety and efficient.Signal between mould protecting and the injection machine adopts IO to communicate by letter, and is convenient succinct, is easy to transplant.This guard method can effectively improve the fluency of injection machine automatic flow, reduces and reports to the police, speed production, protection mould.
Claims (7)
1. injection machine mould protecting based on computer vision; Comprise the master control borad, camera, near-infrared light source and the magnetic holder that adopt embedded chip; It is characterized in that said master control borad links to each other with injection machine through the I/O signaling interface, links to each other with said camera through camera interface; Said camera and near-infrared light source are installed on the magnetic holder; Said magnetic holder is arranged on around the said injection machine, the image in the mould after making camera under near-infrared light source, to collect injection moulding machine mould open; Said master control borad is used to receive the instruction of injection machine, sends instruction to injection machine, and the image of camera collection is analyzed and judged the blanking situation.
2. the injection machine mould protecting based on computer vision according to claim 1 is characterized in that, has the filter that receives only infrared light on the said camera.
3. the injection machine mould protecting based on computer vision according to claim 1 is characterized in that, said I/O signaling interface is that photoelectricity is isolated the I/O signal port.
4. the injection machine mould protecting based on computer vision according to claim 1 is characterized in that, said magnetic holder is the support that the cylindrical clip of magnetic force band steering head is arranged.
5. the injection machine mould protecting based on computer vision according to claim 1 is characterized in that, the DSP6437 chip that the embedded chip on the said master control borad produces for TI company.
6. a use based on the method for the injection machine mould protecting of computer vision, is characterized in that according to claim 1, may further comprise the steps:
(1) after the blanking release, injection machine informs that blanking finishes for I/O signal of mould protecting, requires mould protecting to whether safe blanking detects;
(2) after mould protecting receives that blanking detects the I/O signal, then take, and look like to compare with the empty die drawing that is stored in the protection system to working as front mold; Whether normally to detect blanking,, then notify injection machine to continue next injection cycle through the I/O signal like blanking; If detect unsafe blanking; Then, then notify injection machine to report to the police, stop action through the I/O signal.
7. the injection machine mold protecting method based on computer vision according to claim 6 is characterized in that, and is preceding further comprising the steps of in said step (1):
(A) before the demoulding began after injection moulding machine mould open finishes, injection machine carried out product quality inspection for I/O signal indicating of said mould protecting, and full-automatic pause in action;
(B) mould protecting is after receiving the I/O signal; Begin product is taken; And carry out the product quality situation and calculate, after the completion result of calculation is passed to injection machine through the I/O signal and inform that the quality of injecting products this time of injection machine is that non-defective unit still is poor article;
(C) after injection machine receives the I/O signal that is sent by mould protecting, the I/O signal being judged, is non-defective unit like fruit product, then by blanking screening washer or manipulator product is positioned over the non-defective unit storehouse, if be the difference article, then is positioned over difference article storehouse.
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| CN102814957A (en) * | 2012-08-10 | 2012-12-12 | 浙江工业大学 | Embedded type mold protection system and method based on ZigBee network |
| CN103949632A (en) * | 2014-05-12 | 2014-07-30 | 重庆市机电设计研究院 | Alloy demolding system control method based on machine vision |
| CN104441526A (en) * | 2014-09-24 | 2015-03-25 | 上海智觉光电科技有限公司 | Online mold monitoring and protecting system and method based on contour matching |
| CN106079338A (en) * | 2016-06-21 | 2016-11-09 | 电子科技大学中山学院 | Embedded mold protection device based on wavelet passivation and image processing method thereof |
| TWI616247B (en) * | 2015-04-29 | 2018-03-01 | Towa Corp | Article manufacturing device and manufacturing method |
| CN108700869A (en) * | 2015-12-18 | 2018-10-23 | 伯克希尔格雷股份有限公司 | For identification with the sensory perceptual system and method that handle various objects |
| CN112895362A (en) * | 2021-01-14 | 2021-06-04 | 珠海格力智能装备有限公司 | Linkage control method and device for injection molding machine tool and robot |
| US11494575B2 (en) | 2015-09-11 | 2022-11-08 | Berkshire Grey Operating Company, Inc. | Systems and methods for identifying and processing a variety of objects |
| US11826918B2 (en) | 2020-02-06 | 2023-11-28 | Berkshire Grey Operating Company, Inc. | Systems and methods for camera calibration with a fiducial of unknown position on an articulated arm of a programmable motion device |
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| US11986859B2 (en) | 2015-12-18 | 2024-05-21 | Berkshire Grey Operating Company, Inc. | Perception systems and methods for identifying and processing a variety of objects |
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| CN106079338B (en) * | 2016-06-21 | 2018-07-31 | 电子科技大学中山学院 | Embedded mold protection device based on wavelet passivation and image processing method thereof |
| US11826918B2 (en) | 2020-02-06 | 2023-11-28 | Berkshire Grey Operating Company, Inc. | Systems and methods for camera calibration with a fiducial of unknown position on an articulated arm of a programmable motion device |
| CN112895362A (en) * | 2021-01-14 | 2021-06-04 | 珠海格力智能装备有限公司 | Linkage control method and device for injection molding machine tool and robot |
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Application publication date: 20120229 |