CN1162741A - Method for inspecting hermetically sealed package - Google Patents
Method for inspecting hermetically sealed package Download PDFInfo
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- CN1162741A CN1162741A CN 97102456 CN97102456A CN1162741A CN 1162741 A CN1162741 A CN 1162741A CN 97102456 CN97102456 CN 97102456 CN 97102456 A CN97102456 A CN 97102456A CN 1162741 A CN1162741 A CN 1162741A
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Abstract
An inspection method for inspecting hermetically sealed packages includes placing of a hermetically sealed package, in which a conducting content, such as food, fluid or powder, is packed in an electrically insulating film on a grounded support electrode with a side face portion of the hermetically sealed package in contact therewith, and a DC high voltage is applied between the support electrode and an electrode put into close contact with an inspection-object end portion of the hermetically sealed package to charge the contents. The earthling at the support electrodes is removed and the electrode put into contact with the inspection-object end portion is grounded, and a discharge current from the inspection-object end portion is detected with a discharge current detecting device, by which the presence or absence of pinholes is detected.
Description
The present invention relates to a kind of method of pin hole of the complete hermetically sealed package of checking food and medical consumables.
Packing is in order to content is remained in the sterilization state, current except that the medical consumables that are widely used for food and normal saline solution etc., also is used for other multiple commodity.And be used under the situation of food, if any pin hole, then Bao Zhuan content contacts with atmosphere and causes going bad, addling of food.In addition, as be used under the situation of medical consumables, for example infusion bottle, then can make content pollute, go bad.Therefore, the pin hole inspection of these hermetically sealed packages is crucial.Current inspection method as this pin hole, owing in hermetically sealed package, can not insert electrode, under the situation of food, then insert metal needle in the packing material after making, and with it as an electrode, the outer electrode that will contact with packing material is as the opposing party's electrode, and applies high voltage to check pin hole between two electrodes, by another operation pin hole sealed then.But this method is miscellaneous, but also essential sealing of hole operation.For eliminating this shortcoming, the method that also has is checked pin hole under the situation of not damaging hermetically sealed package, for example, such shown in the special public clear 50-6998 communique, food to be checked is sandwiched between the pair of electrodes, applies voltage between two electricity, it is poor greatly that the static capacity that each electrode and provision room are formed produces, electrode by detecting a side and the flashover current between the food, thus detect pin hole.
As mentioned above, by detecting because the electric current that arcing produces when detecting pin hole, is to detect whether pin hole to be arranged by the variation (size) that detects electric current in practical operation.At this moment, the quilt of atmosphere is picked up humidity and temperature around the thing and the influence of the micronic dust that swims makes the electric current of test section produce error owing to form to detect, so that misoperation takes place unavoidablely, also differentiates for pin hole is arranged even without pin hole.
The objective of the invention is, shortcoming in view of above-mentioned prior art, a kind of inspection method of hermetically sealed package is provided, this method will be clipped between the pair of electrodes with the hermetically sealed package of the content of the liquid with electric conductivity of electrical insulating property epithelium packing and powder or food, when applying high pressure then with the inspection pin hole, the misoperation that the atmosphere in the time of can preventing owing to inspection fully causes.
At this moment, be food as the hermetically sealed package of checking object, then its main article have every seal-packed columned sausage, are loaded on the disinfecting food in the flat, plastic bag film in addition; As be medical consumables, as prevent owing to pin hole cause contact with outer gas cause that content pollutes, rotten inspection object then has the infusion solution of containing the normal saline solution that is stated from the thin plastic infusion bottle and Lin Geer liquid etc., in addition, pack blood transfusion in polybag in addition into the Blood Preparations of blood and blood plasma etc.
In addition, the hermetically sealed package that the powder conducting objects such as iron powder of solid content are loaded in the foil-type plastic bag also may become the inspection object.
For reaching above-mentioned purpose, the inspection method of hermetically sealed package of the present invention comprises the following steps: will have content 1 parcel of the liquid of electric conductivity and powder or food to form hermetically sealed package 3 with electrical insulating property epithelium 3; With the lateral parts 31 contact mountings of sealing packing material 3 on the support electrode 4 of the shape that formalizes of the battery lead plate of ground connection etc.; Apply dc high voltage connecting airtight and closely be connected between the electrode 5 of tested end 3a of above-mentioned hermetically sealed package 3 and the above-mentioned support electrode 4, when there is pin hole tested end, make content 1 charging by this pin hole; Remove the ground connection of above-mentioned support electrode 4 then, make contacted above-mentioned electrode 5 ground connection of above-mentioned and tested end 3a simultaneously, with the discharge current of detection from tested end 3a, thus the pin hole of detection hermetically sealed package 3.
In view of the above, when the tested end 3a of hermetically sealed package 3 has pin hole, by and the tested end 3a of hermetically sealed package 3 connect airtight or closely connect the electrode 5 on opposite and be contacted with added dc high voltage between the support electrode 4 of side surface part part 31 of hermetically sealed package 3, by the content 1 of pin hole to hermetically sealed package, through the electrical isolation epithelium 2 that contacts with support electrode 4, to negative (-) charge generation of the support electrode of ground connection (+) ion and being charged just.Moreover the situation that closely connects on tested end 3a and electrode 5 opposites produces arcing because dc high voltage makes between the pin hole of electrode 5 and tested end, thereby the content 1 of hermetically sealed package is charged.As do not have pin hole, then no matter how humidity and atmosphere are not recharged.
Then, in the ground connection of removing above-mentioned support electrode 4, the above-mentioned electrode 5 that will contact (on tested end 3a and electrode 5 opposites approaching situation then for contacting) ground connection with above-mentioned tested end 3a, make the charge discharge that charges on foregoing thing 1, by detecting this discharge current to detect the pin hole of tested end 3a.
At this moment, the irrelevant ground of atmosphere when checking, when detected part does not have pin hole, 1 of content is not recharged fully, has pin hole just to be recharged, so can inerrably detect tested end 3a (promptly producing the place of pin hole) really whether pin hole is arranged.
In addition, as electrode 5, can adopt and to make with the conducting rubber that tested end 3a connects airtight.Promptly under the tested end and similar situation of using the volume production moulded products, utilize can keep necessarily or haply the elastic force of the conducting rubber of definite shape can be easy to electrode 5 is connected to the surface of tested end with the formation conducting.
Among the present invention, the electrical insulating property epithelium 2 of content 1 for the hermetically sealed package 3 of parcel examine has adopted plastic sheeting corresponding with content or thin plastic cement.
That is, be under the situation of fish meat sausage for example at content 1, adopt the bag of polyvinyl chloride film system, filled fish meat sausage grind the flesh of fish after, with aluminum steel both ends are clamped, carry out sterilization at heating kettle.In addition, in the disinfecting food, those article of bag that adopt internal layers not contain the laminated film (multilayer film) of aluminium foil also can be used as the hermetically sealed package of examine.At this moment, then adopt the bag of nylon and polypropylene or polyester and polypropylene, polyester and Polyvinylchloride and polyacrylic laminated film.On the other hand, transfusion such as normal saline solution and Lin Geer liquid in this way, then adopt respectively fixed thin plastic cement infusion bottle.
Moreover, as the liquid with electric conductivity of content 1, also can adopt the liquid of solid content, for example the electric conductivity powder of iron powder etc.
Fig. 1 is the pie graph of the of the present invention inspection method of hermetically sealed package when being the infusion bottle of normal saline solution etc.;
Fig. 2 is that hermetically sealed package is the pie graph of last stage that is bracing the sausage time-like inspection method of the present invention of end;
The pie graph of Fig. 3 is hermetically sealed package when being the adiabatic packed food of disinfecting food etc. last stage of inspection method of the present invention.
Among the figure, 1-content, 2-electrical insulating property epithelium, 3-hermetically sealed package, the tested end of 3a-, 4-support electrode, 5-electrode.
Followingly some embodiments of the present invention are described in detail with reference to accompanying drawing.
Embodiment 1
Fig. 1 shows the pie graph when hermetically sealed package 3 is used infusion bottle for the drop that has sealed normal saline solution.
This infusion bottle 3 has the body that is formed by thicker plastic cement epithelium 2, and its xsect is 65 millimeters * 90 millimeters a round rectangle, and height is 240 millimeters, and capacity is 1000 milliliters.Form easily the tested end 3a of pin hole, its peristome is 28 millimeters of external diameters, thick 8 millimeters section difference end, and the glue spigot 3b that inserts usefulness at the drop pin is provided with hermetic seal, is provided with suspension ring portion in opposite end.At tested end 3a, the place that is easy to generate pin hole even space be keeping glue spigot 3b the ring-type segment difference section periphery and keeping the peristome and the glue spigot 3b boundary member of the segment difference section of glue spigot 3b.
When the pin hole of the tested end 3a that checks this this infusion bottle 3, at first, apply dc high voltage between the support electrode 4 with it mounting in the electrode 5 that connects airtight with this tested end 3a and the side 31 that contacts infusion bottle 3.Connect airtight in the electrode 5 of this tested end 3a and have becket part that the separate section 51,51 of the shape that formalizes by being divided into constitutes, be embedded in this loop section and the sheet metal part 52 that connects airtight with above-mentioned glue spigot 3b with institute's uniform section.During use it and side and the place ahead of this tested end 3a are connected airtight.
On the other hand, the support electrode 4 of mounting infusion bottle 3 is a tabular, has the comprehensive institute sizing of the side 31 of supporting infusion bottle 3, by the bottom ground connection of a lead with this electrode 4, is connected to negative (-) end of DC high-voltage power supply 6 simultaneously.In addition, 5 at the electrode that connects airtight with tested end 3a is connected to just (+) end of this direct voltage source 6, between this electrode 5 and support electrode 4, apply fixed dc high voltage (0.6KV～30KV).In view of the above, tested end 3a there is content 1 charging in pin hole and even suitable therewith gap.
Then, the ground connection of the support electrode 4 of mounting hermetically sealed package 3 is removed, or with it move to the support electrode 4 that constitutes by insulating material '.Then, remove being connected of just (+) end of the electrode 5 of tested end 3a and DC high-voltage power supply, and with lead 8 ground connection of this electrode 5.This lead 8 is provided with and flows in the electric current of this lead 8 in order to detection and be wound in the discharge current pick-up unit 7 of the current detecting part 7a on this lead 8.Used in this current sensing means 7 fixed current transformer (CT), but also can adopt the electric current detector that is series between above-mentioned electrode 5 and the ground connection to detect electric current.
In view of the above, when tested end 3a has pin hole, the content 1 of hermetically sealed package 3 is recharged, make lead 8 streams that discharge current be arranged, this discharge current is detected by discharge current pick-up unit 7, and when not having pin hole, content 1 is not recharged, thereby lead 8 do not have discharge current, thereby the discharge current pick-up unit does not just detect discharge current.Therefore, the output of current sensing means is connected to appropriate display devices such as instrument, alarm buzzer and warning light, just knows whether tested end 3a has pin hole easily.
Fig. 2 shows the tested end survey 3a of portion of hermetically sealed package 3 for the brace portion of content 1 with the bag of electrical isolation epithelium 2 sealings, checking matter is applied the situation of dc high voltage.At this moment, the pin hole that electrical insulating property epithelium 2 takes place concentrate on tested end 3a near.
Content 1 for example is the fish meat sausage class, and electrical insulating property epithelium 2 is Polyvinylchloride monomer film, and is transparent and have shrinkability and good insulation performance, and the end of having filled the bag of content fraps with aluminum steel.The support electrode 4 of mounting checking matter by have corresponding to the arcuation inner face of checking matter the sheet metal of setting shape, the portion of bracing at two ends is tested 3a, 3a, electrode 5,5 and bracing with tested 3a connects airtight, make by porous conducting rubber respectively, one side of its central authorities is provided with the recess that can accommodate tested 3a, forms the cap shape that connects airtight with tested end 3a by the extruding force to tested end 3a.Above-mentioned support electrode 4 is in ground connection, be also connected to negative (-) end of DC high-voltage power supply 6, the a pair of cap- shaped electrode 5,5 at checking matter two ends then is connected with just (+) of DC high-voltage power supply 6 end, support electrode 4 with wear the then the same dc high voltage that is applied in 0.6KV～30KV between the electrode 5,5 of tested end 3a with above-mentioned first embodiment.Like this, as two tested end 3a of tested hermetically sealed package 3, when 3a has pin hole, content 1 is recharged, the same ground connection of removing support electrode 4 with the foregoing description, or it is moved on to the support electrode made from insulating material, then, the lead 8 of releasing pair of electrodes 5,5 is connected with the anode (+) of DC high-voltage power supply 6, and with it ground connection.
So the same with above-mentioned first embodiment, the discharge current pick-up unit 7 that utilizes current transformer (CT) etc. is with the flow through discharge current of lead 8 of detection, whether pin hole is arranged according to whether having discharge current just can detect sealed packing material 3.
Fig. 3 shows the situation of checking hermetically sealed packages 3 such as disinfecting food, the heat seal portion that wherein tested end 3a is a plastic film bag.In such hermetically sealed package, the pin hole of electrical insulating property epithelium concentrates on heat seal portion, near the promptly tested end 3a.
Content 1 is a food in the bag of disinfecting food etc., and electrical insulating property epithelium 2 does not contain the above-mentioned composite plastic thin (layered film) of aluminium foil for internal layer.With it mounting in the big or small corresponding flat support electrode 4 of checking matter on, this support electrode 4 is grounded by lead, is connected with negative (-) end of DC high-voltage power supply 6 simultaneously.The electrode 5 that connects airtight with tested end 3a is provided with on its central authorities one surface of being made by porous conductive rubber and the slit of the shape that formalizes of tested end 3a clamping can be opened the both sides in slit just and tested end 3a can be inserted wherein.By this electrode 5 is that tested end 3a, 3a clamp with the heat sealing part of the both sides of tested packing material 3 respectively, be connected to just (+) end of DC high-voltage power supply 6, thereby, between this electrode 5,5 that support electrode 4 and tested end 3a are connected airtight, apply the DC voltage of 0.6KV～30KV with the above embodiments sample.Then, remove the ground connection of support electrode 4, or it is moved on to the support electrode that is made of insulating material, remove the lead 8 and being connected that just (+) of DC high-voltage power supply 6 holds of pair of electrodes 5,5, and with it ground connection, the discharge current of lead 8 of ground connection of flowing through can give detection with the discharge current pick-up unit, and its way is identical with the above embodiments.Just can detect the heat seal position that is easy to generate pin hole of tested packing material 3 by detection near whether pin hole is arranged to discharge current.
As mentioned above, tested packing material is being charged, by detecting discharge current when checking, because if tested hermetically sealed package does not have pin hole just can never be recharged, so influence of the atmosphere when not being subjected to humidity and inspection, thereby the inspection mistake that the atmosphere in the time of can preventing owing to inspection fully causes can not take place there not being pin hole to think the situation of pin hole by mistake.
Moreover, in the above-described embodiment, when tested hermetically sealed package is applied dc high voltage, support electrode is connect (-) end of negative supply, and tested end connects just (+) end of power supply, but according to the content of tested packing material, also can (+), the connection of (-) end reverse.
In addition, except that the above embodiments, the inspection method of hermetically sealed package of the present invention can be applicable to the ampoule of parenteral solution and oral liquid too.For example, the body part mounting of ampoule class that will have circular-arc inner face is in support electrode, fore-end at the ampoule of the neck that comprises easy generation pin hole is put on electrode, between this electrode and support electrode, apply dc high voltage, detect the discharge current of ampoule then, thereby check whether pin hole is arranged.
The inspection method of hermetically sealed package of the present invention according to claim 1 is checking Sealing with the content of the liquid with electric conductivity of epithelium packing and powder and food etc. During the pin hole of packing material, when only in tested section pin hole being arranged just to tested hermetically sealed package charging, Mat detects its discharge current and detects pin hole again, like this, and just can not be to quilt as prior art The inspection thing applies high voltage, when being subjected to humidity and inspection when carrying out the detection of pin hole by electric current The impact of atmosphere, thus can prevent the generation of misoperation fully, and be to the easiest generation pin The tested end at the position in hole checks, so can improve the effect that the pin hole of hermetically sealed package checks Rate.
Again, when a plurality of checking matters are applied high voltage and check, the quilt that only has those to be recharged The inspection thing has just detected pin hole, and the number of the checking matter that usually is recharged is seldom, even and quilt Charging, required electric energy also seldom, so check dangerous low, degree of safety is high.
The present invention according to claim 2 is when the easiest generation pin hole of hermetically sealed package Tested end for a large amount of produce product, it is shaped as one regularly, utilization is made by conducting rubber The elasticity of electrode make it to connect airtight with tested end, just can easily carry out the inspection of hermetically sealed package Look into.
Claims (2)
1. the inspection method of a hermetically sealed package is characterized in that comprising the following steps:
To have the liquid of electric conductivity and the content (1) of powder or food etc. wraps up with electrical insulating property epithelium (2), the hermetically sealed package (3) of gained is positioned on the support electrode (4) with the shape that formalizes of grounding electrode plate etc., the side (31) of sealing thing (3) is contacted with this support electrode (4);
And the tested end (3a) of sealing packing material (3) connect airtight or closely connect between the electrode (5) on opposite and the described support electrode (4) and apply dc high voltage, by this pin hole content (1) is charged when pin hole being arranged with the tested end of box lunch;
Remove the ground connection of above-mentioned support electrode (4), simultaneously above-mentioned electrode (5) ground connection that will contact with described tested end;
Detection is from the discharge current of tested end (3a), thus the pin hole of detection hermetically sealed package (3).
2. the inspection method of hermetically sealed package as claimed in claim 1 is characterized in that, described electrode (5) is can connect airtight with tested end (3a) and the conducting rubber that forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97102456 CN1162741A (en) | 1996-02-16 | 1997-02-15 | Method for inspecting hermetically sealed package |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53816/96 | 1996-02-16 | ||
| CN 97102456 CN1162741A (en) | 1996-02-16 | 1997-02-15 | Method for inspecting hermetically sealed package |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1162741A true CN1162741A (en) | 1997-10-22 |
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ID=5166291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97102456 Pending CN1162741A (en) | 1996-02-16 | 1997-02-15 | Method for inspecting hermetically sealed package |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1162741A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1975360B (en) * | 2005-11-30 | 2010-05-26 | 株式会社石田 | Package seal checker |
| CN101341400B (en) * | 2005-12-20 | 2012-01-11 | 利乐拉瓦尔集团及财务有限公司 | Sealing status inspecting apparatus and sealing status inspecting method |
| CN103162921A (en) * | 2011-12-12 | 2013-06-19 | 中国科学院沈阳自动化研究所 | Pinhole detection method for sealed package |
-
1997
- 1997-02-15 CN CN 97102456 patent/CN1162741A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1975360B (en) * | 2005-11-30 | 2010-05-26 | 株式会社石田 | Package seal checker |
| CN101341400B (en) * | 2005-12-20 | 2012-01-11 | 利乐拉瓦尔集团及财务有限公司 | Sealing status inspecting apparatus and sealing status inspecting method |
| CN103162921A (en) * | 2011-12-12 | 2013-06-19 | 中国科学院沈阳自动化研究所 | Pinhole detection method for sealed package |
| CN103162921B (en) * | 2011-12-12 | 2015-12-09 | 中国科学院沈阳自动化研究所 | The Pinhole method of hermetically sealed package |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |